Casual Articles
#1 in Business Subscribe Email Print

You are here: Home > Business > Industrial Mechanical > Pcm In Textiles

Tags

  • company
  • bodythe
  • finishing
  • protection however
  • micro encapsulation
  • protective clothing

  • Links

  • Do you Live to Work, or Work to Live?
  • Low Carb Diet Menus- The Awful Truth About Hidden Carbohydrates
  • 5 Things To Look For In A Mortgage Broker
  • Casual Articles - Pcm In Textiles

    More Than a Guarantee
    A guarantee of satisfaction can be an absolutely fantastic loyalty builder, whether yours is a consumer-oriented company or it sells to other businesses. But it can also be an instant turn off if it’s wordy or difficult to understand. Whatever you choose to guarantee – personal satisfaction, quality or both – keep in mind that before offering any guarantee it should be reviewed by your attorney because it will have legal implications.Let’s check out a few real-life guarantees for their loyalty building potential. Example 1 isn’t too wordy, it’s easy to understand, and it actually sells itself. And, in the minds of its customers, it represents the personality of that merchant.“Guaranteed” exclaims its headline in bold letters. And, beneath it, “You Have Our Word®” Here’s a company that’s so proud of those five words that they trademarked them. And why not? They seems straight forward, down to earth, and capable of being easily understand by virtually anyone.But there’s more to the guarantee, in smaller type under those first two lines, and here it is: “Our products are guaranteed to give 100% satisfaction in every way. Return anything purchased from us at any time if it proves otherwise. We do not want you to have anything from (ABC Co) that is not completely satisfactory.”How’s that for being all-inclusive? Now that you’ve read the entire guarantee, that earlier description still seems to apply, right? Straight forward, down to earth, capable of being easily understood by virtually anyone. The additional words leave you with an almost warm fuzzy feeling in the pit of your stomach, like here’s a company that truly cares.OK, here’s Example No. 2: “GUARANTEED. PERIOD.®” Boy, there's no mistaking what this retailer means. Or is there? This company features that headline in all caps. They, too, went so far as to register their guarantee as a trademark. Talk about serious, huh?But while this example seems as simple as it gets, what does it mean? How far will the company go to stand behind that rather all-encompassing headline? As it happens, they explain that very well. Not as part of the trademark, but usually positioned very close to it is the following explanation:”The world is full of guarantees, no two alike. As a rule, the more w
    of the clothing is decreased during physical activity, a part of the generated heat can be removed by convection, thus the body is not needed expected to perspire so much.

    The quality of insulation in a garment in terms of heat and cold will be widely managed by the thickness and density of its component fabrics. High thickness and low density make insulation better. It is observed in many cases that thermal insulation is offered by air gaps between the garment layers.

    However, the external temperature also influences the effectiveness of the insulation. The more extreme the temperature, be it very high or very low, the less effective the insulation becomes. Thus, a garment designed for its capability to protect against heat or cold is chosen by its wearer on the expectation of the climate in which the garment is to be worn.

    Though, a garment produced from a thick fabric will have more weight, and the freedom of movement of the wearer will be restricted. Clearly then a garment designed from an intelligent fabric, whose nature can change according the external temperature, can offer superior protection. However, such a garment must be comfortable for the wearer.

    Temperature change effect of PCMs PCM microcapsules can create small, transitory heating and cooling effects in garment layers when the temperature of the layers reaches the PCM transition temperature. The effect of phase change materials on

    Self Confidence Building for Job Hunters
    One crucial factor to the success of your job search is confidence. Being unaware of your own potential, or being too timid to apply for suitable could result in your ending up in a job which does not stretch you and will become boring very quickly.No-one feels supremely confident all the time and a little anxiety before a job interview is perfectly normal. So is the thought that other people might be better qualified that you. However, being so anxiety that you don’t apply for any jobs, or jobs for which you are over-qualified shows a lack of self-esteem. It’s important to remember also that no-one is confident in every aspect of their lives. A student who is an excellent basketball play may be confident on the court but completely lacking in confidence when he has to write an academic assignment.How can you improve your self-esteem and use it your advantage when looking for a job? Here are a few tips to help you:Talk to someone who is familiar with your abilities and who has encouraged and motivated you in the past. This could be a family member, a friend or colleague.Find activities about which you already feel confident, no matter how insignificant or unrelated to work they may seem. So if you can sing, cook great meals, bake delicious cakes, play a sport well or have a hobby in which you are skilled, do it more often and allow yourself to be conscious of the feeling of confidence it brings. Allow yourself to enhance that feeling by basking in it afterwards.Make a list of your achievements. These can be successes you’ve had as a student, in previous jobs or in any other aspect of your life. This will help you to feel better about yourself and add to the feelings of confidence.List your transferable skills. This will give you a more realistic view of your capabilities and you may be surprised to realize just how many skills you have. Include soft skills, such as communication skills, team building skills and the ability to work on your own initiative. These may not seem very important, but in fact, employers state that soft skills are the ones in which candidates are most lacking. So if you have good soft skills, you are very much in demand in the marketplace.You can also increase your chances of getting an interview by taking the time to produce a
    Phase Change Materials (PCM) in Textiles In textile industry, protection from extreme environmental conditions is a very crucial requirement. Clothing that protects us from water, extreme cold, intensive heat, open fire, high voltage, propelled bullets, toxic chemicals, nuclear radiations, biological toxins, etc are some of the illustrations.

    Such clothing is utilized as sportswear, defense wear, firefighting wear, bulletproof jackets and other professional wear. Textile products can be made more comfortable when the properties of the textile materials can adjust with all types of environments.

    At present, for fulfilling the above requirement Phase Change Materials (PCM) is one such intelligent material. It absorbs, stores or discharges heat in accordance with the various changes in temperature and is more often applied to manufacture the smart textiles.

    Phase Change Materials 'Phase Change' is the process of going from one stat to another, e.g. from solid to liquid. Any material that experiences the process of phase change is named as Phase Change Materials (PCM).

    Such materials collect, discharge or absorb heat as they oscillate between solid and liquid form. They discharge heat as they transform to a solid state and absorb as they go back to a liquid state. There are three basic phases of matter solid, liquid and gas, but others like crystalline, colloid, glassy, amorphous and plasma phases are also considered to exist.

    This fundamental phenomenon of science was initially developed and used for building space suits for astronauts for the US Space Program. These suits kept the astronauts warm in the black void of space and cool in the solar glare. Phase Change Materials are compounds, which melt and solidify at specific temperatures and correspondingly are able to retain or discharge large amounts of energy.

    The storage of thermal energy by changing the phase of a material at a constant temperature is classified as 'latent heat', i.e., changing from a liquid state to a solid state. When a PCM experiences a phase change, a huge amount of energy is needed. The most significant characteristic of latent heat is that it involves the transfer of much larger amounts of energy than sensible heat transfer.

    Quiet a few of these PCMs change phases within a temperature range just above and below human skin temperature. This characteristic of some substances is used for making protective all-season outfits, and for abruptly changing environment. Fibre, fabric and foam with built-in PCMs store the warmth of body and then release it back to the body, as the body requires it. Since the procedure of phase change is dynamic, the materials are continually shifting from solid to liquid and back according to the physical movement of the body and outside temperature. Furthermore, Phase Change Materials are used, but they never get used up.

    Phase Change Materials are waxes that have the distinctive capacity to soak and emit heat energy without altering the temperature. These waxes include eicosane, octadecane, Nonadecane, heptadecane and hexadecane. They all possess different freezing and melting points and when mixed in a microcapsule it will accumulate heat energy and release heat energy and maintain their temperature range of 30-34°C, which is very comfortable for the body.

    The amount of heat absorbed by a PCM in the actual phase change with the amount of heat absorbed in an ordinary heating procedure can be evaluated by taking water as a PCM. The melting of ice into water leads to the absorption of latent heat of nearly 335 J/g. If water is further boiled, a sensible heat of only 4 J/g is absorbed, while the temperature increases by one degree. Hence, the latent heat absorption in the phase change from ice into water is about 100 times greater than the sensible heat absorption.

    How to assimilate PCMs in fabrics? The micro encapsulated PCM can be combined with woven, non woven or knitted fabrics.

    The capsules can be added to the fabric in various ways such as:

    Microcapsules: Microcapsules of various shapes - round, square and triangular within fibres at the polymer stage. The PCM microcapsules are permanently fixed within the fibre structure during the wet spinning procedure of fibre manufacture. Micro encapsulation gives a softer hand, greater stretch, more breathability and air permeability to the fabrics.

    Matrix coating during the finishing process: The PCM microcapsules are embedded in a coating compound like acrylic, polyurethane, etc, and are applied to the fabric. There are many coating methods available like knife-over-roll, knife-over-air, pad-dry-cure, gravure, dip coating and transfer coating.

    Foam dispersion: Microcapsules are mixed into a water-blown polyurethane foam mix and these foams are applied to a fabric in a lamination procedure, where the water is removed from the system by the drying process.

    Body and clothing systems The needed thermal insulation of clothing systems mainly depends on the physical activity and on the surrounding conditions such as temperature and relative humidity. The amount of heat produced by humans depends a lot on the physical activity and can differ from 100W while resting to over 1000W during maximum physical performance.

    Specially, during the cooler seasons (approx 0°C), the suggested thermal insulation is defined in order to make sure that the body is adequately warm when resting. At extreme activity, which is often a case with winter sports, the body temperature rises with enhanced heat production. To make this increase within a certain limit, the body perspires in order to withdraw energy from the body by evaporative cooling. If the thermal insulation of the clothing is decreased during physical activity, a part of the generated heat can be removed by convection, thus the body is not needed expected to perspire so much.

    The quality of insulation in a garment in terms of heat and cold will be widely managed by the thickness and density of its component fabrics. High thickness and low density make insulation better. It is observed in many cases that thermal insulation is offered by air gaps between the garment layers.

    However, the external temperature also influences the effectiveness of the insulation. The more extreme the temperature, be it very high or very low, the less effective the insulation becomes. Thus, a garment designed for its capability to protect against heat or cold is chosen by its wearer on the expectation of the climate in which the garment is to be worn.

    Though, a garment produced from a thick fabric will have more weight, and the freedom of movement of the wearer will be restricted. Clearly then a garment designed from an intelligent fabric, whose nature can change according the external temperature, can offer superior protection. However, such a garment must be comfortable for the wearer.

    Temperature change effect of PCMs PCM microcapsules can create small, transitory heating and cooling effects in garment layers when the temperature of the layers reaches the PCM transition temperature. The effect of phase change materials on

    Interviewing & Becoming President
    Interviewing is often perceived as being about the candidate. Makes sense – the candidate is the person being interviewed after all… True, but the interviewer is the person making the decision. Who are the most important persons in an electoral debate? Is it the two presidential candidates that are debating each other? Wrong! Why are those candidates on television? To convince each member of the electorate that will eventually cast a vote on Election Day.“The person making the decision is the most important person. It’s that simple.”Although this comparison is imperfect, it shows a nuance too often missed by candidates attending job interviews, who tend to put too much focus on themselves. What does that mean? It means that answering questions correctly is not sufficient. To “win a job”, a candidate has to do more than answering questions correctly. He or she also has to leave his or her mark. How can a candidate do that? By paying close attention to the interviewers’ demeanors and reactions. Only by being attentive to your audience will you be able to connect with it and pass your message through.“Don’t focus only on your answers. Instead, focus on the image you want to project of yourself and the interviewers’ reactions.”The key is to have interviewers that are receptive. They will be receptive if you show real interest in the position and if you can engage in a real conversation – as opposed to only answering questions.As in a real election, once you are chosen, you will gain your power back (the winning president will be given the mandate to lead the country for his term in office). Until then, you are nothing more than a salesman.“What you say is not the only thing that matters. It’s also how you say it.”Don’t forget to smile!
    also considered to exist.

    This fundamental phenomenon of science was initially developed and used for building space suits for astronauts for the US Space Program. These suits kept the astronauts warm in the black void of space and cool in the solar glare. Phase Change Materials are compounds, which melt and solidify at specific temperatures and correspondingly are able to retain or discharge large amounts of energy.

    The storage of thermal energy by changing the phase of a material at a constant temperature is classified as 'latent heat', i.e., changing from a liquid state to a solid state. When a PCM experiences a phase change, a huge amount of energy is needed. The most significant characteristic of latent heat is that it involves the transfer of much larger amounts of energy than sensible heat transfer.

    Quiet a few of these PCMs change phases within a temperature range just above and below human skin temperature. This characteristic of some substances is used for making protective all-season outfits, and for abruptly changing environment. Fibre, fabric and foam with built-in PCMs store the warmth of body and then release it back to the body, as the body requires it. Since the procedure of phase change is dynamic, the materials are continually shifting from solid to liquid and back according to the physical movement of the body and outside temperature. Furthermore, Phase Change Materials are used, but they never get used up.

    Phase Change Materials are waxes that have the distinctive capacity to soak and emit heat energy without altering the temperature. These waxes include eicosane, octadecane, Nonadecane, heptadecane and hexadecane. They all possess different freezing and melting points and when mixed in a microcapsule it will accumulate heat energy and release heat energy and maintain their temperature range of 30-34°C, which is very comfortable for the body.

    The amount of heat absorbed by a PCM in the actual phase change with the amount of heat absorbed in an ordinary heating procedure can be evaluated by taking water as a PCM. The melting of ice into water leads to the absorption of latent heat of nearly 335 J/g. If water is further boiled, a sensible heat of only 4 J/g is absorbed, while the temperature increases by one degree. Hence, the latent heat absorption in the phase change from ice into water is about 100 times greater than the sensible heat absorption.

    How to assimilate PCMs in fabrics? The micro encapsulated PCM can be combined with woven, non woven or knitted fabrics.

    The capsules can be added to the fabric in various ways such as:

    Microcapsules: Microcapsules of various shapes - round, square and triangular within fibres at the polymer stage. The PCM microcapsules are permanently fixed within the fibre structure during the wet spinning procedure of fibre manufacture. Micro encapsulation gives a softer hand, greater stretch, more breathability and air permeability to the fabrics.

    Matrix coating during the finishing process: The PCM microcapsules are embedded in a coating compound like acrylic, polyurethane, etc, and are applied to the fabric. There are many coating methods available like knife-over-roll, knife-over-air, pad-dry-cure, gravure, dip coating and transfer coating.

    Foam dispersion: Microcapsules are mixed into a water-blown polyurethane foam mix and these foams are applied to a fabric in a lamination procedure, where the water is removed from the system by the drying process.

    Body and clothing systems The needed thermal insulation of clothing systems mainly depends on the physical activity and on the surrounding conditions such as temperature and relative humidity. The amount of heat produced by humans depends a lot on the physical activity and can differ from 100W while resting to over 1000W during maximum physical performance.

    Specially, during the cooler seasons (approx 0°C), the suggested thermal insulation is defined in order to make sure that the body is adequately warm when resting. At extreme activity, which is often a case with winter sports, the body temperature rises with enhanced heat production. To make this increase within a certain limit, the body perspires in order to withdraw energy from the body by evaporative cooling. If the thermal insulation of the clothing is decreased during physical activity, a part of the generated heat can be removed by convection, thus the body is not needed expected to perspire so much.

    The quality of insulation in a garment in terms of heat and cold will be widely managed by the thickness and density of its component fabrics. High thickness and low density make insulation better. It is observed in many cases that thermal insulation is offered by air gaps between the garment layers.

    However, the external temperature also influences the effectiveness of the insulation. The more extreme the temperature, be it very high or very low, the less effective the insulation becomes. Thus, a garment designed for its capability to protect against heat or cold is chosen by its wearer on the expectation of the climate in which the garment is to be worn.

    Though, a garment produced from a thick fabric will have more weight, and the freedom of movement of the wearer will be restricted. Clearly then a garment designed from an intelligent fabric, whose nature can change according the external temperature, can offer superior protection. However, such a garment must be comfortable for the wearer.

    Temperature change effect of PCMs PCM microcapsules can create small, transitory heating and cooling effects in garment layers when the temperature of the layers reaches the PCM transition temperature. The effect of phase change materials on

    Franchise Rule Staff Report RF511003-1 at the FTC completely flawed
    Having been in the franchising industry for some time now, I always find it fascinating when a regulator arbitrarily decides that we need more laws. As if we do not have enough laws impeding commerce there is always some regulator somewhere who says we need more rules. I cannot think of any reason why unless maybe the work for Al Queda and want to cripple America’s economic might; no maybe they do not work for the International Terrorists group. Maybe they just want to insure job security now and later when the get a real job in the private sector defending businesses against the insanity of government regulations?So you think I am anti-consumer? No, not even close, I love my customers and I do not wish to over charge them to make up for all the money I spend in complying with bogus regulations, which help no free man or free enterprise entrepreneur or corporation. It is for this reason that I am commenting on the Use of the words “Cost-Effective” when discussing the current Franchise Disclosure Documents in the Federal Trade Commission’s report on franchising.I first would like to formally announce that entrepreneurs when commenting on public regulatory policy should in fact forgo the niceties and compliments that so often accompany letters to the Federal Trade Commission. I do not believe they are deserved, I sincerely hope the Commission understands the absurdity of the bureaucracy they create and purport as Justice. I believe professionalism and respect must be earned, I do not feel the commission has ever earned that, nor do I believe they are capable of earning such respect after 15 years of studying the Franchising Division of the Federal Trade Commission. In my opinion the Federal Trade Commission’s Franchising Division Efforts to the common good of America would better be classified as far closer to International Terrorism than anything resembling Truth, Justice or the American Way or the contrived notion of supporting free markets.What is the Federal Trade Commission’s justification for further rule making in franchising and specifically in this letter on a comment made, found on page 21 of the special franchise report concerning “Cost-Effective” nature of the disclosure documents themselves. My concerns come from many different directions and the costs associated wi
    y never get used up.

    Phase Change Materials are waxes that have the distinctive capacity to soak and emit heat energy without altering the temperature. These waxes include eicosane, octadecane, Nonadecane, heptadecane and hexadecane. They all possess different freezing and melting points and when mixed in a microcapsule it will accumulate heat energy and release heat energy and maintain their temperature range of 30-34°C, which is very comfortable for the body.

    The amount of heat absorbed by a PCM in the actual phase change with the amount of heat absorbed in an ordinary heating procedure can be evaluated by taking water as a PCM. The melting of ice into water leads to the absorption of latent heat of nearly 335 J/g. If water is further boiled, a sensible heat of only 4 J/g is absorbed, while the temperature increases by one degree. Hence, the latent heat absorption in the phase change from ice into water is about 100 times greater than the sensible heat absorption.

    How to assimilate PCMs in fabrics? The micro encapsulated PCM can be combined with woven, non woven or knitted fabrics.

    The capsules can be added to the fabric in various ways such as:

    Microcapsules: Microcapsules of various shapes - round, square and triangular within fibres at the polymer stage. The PCM microcapsules are permanently fixed within the fibre structure during the wet spinning procedure of fibre manufacture. Micro encapsulation gives a softer hand, greater stretch, more breathability and air permeability to the fabrics.

    Matrix coating during the finishing process: The PCM microcapsules are embedded in a coating compound like acrylic, polyurethane, etc, and are applied to the fabric. There are many coating methods available like knife-over-roll, knife-over-air, pad-dry-cure, gravure, dip coating and transfer coating.

    Foam dispersion: Microcapsules are mixed into a water-blown polyurethane foam mix and these foams are applied to a fabric in a lamination procedure, where the water is removed from the system by the drying process.

    Body and clothing systems The needed thermal insulation of clothing systems mainly depends on the physical activity and on the surrounding conditions such as temperature and relative humidity. The amount of heat produced by humans depends a lot on the physical activity and can differ from 100W while resting to over 1000W during maximum physical performance.

    Specially, during the cooler seasons (approx 0°C), the suggested thermal insulation is defined in order to make sure that the body is adequately warm when resting. At extreme activity, which is often a case with winter sports, the body temperature rises with enhanced heat production. To make this increase within a certain limit, the body perspires in order to withdraw energy from the body by evaporative cooling. If the thermal insulation of the clothing is decreased during physical activity, a part of the generated heat can be removed by convection, thus the body is not needed expected to perspire so much.

    The quality of insulation in a garment in terms of heat and cold will be widely managed by the thickness and density of its component fabrics. High thickness and low density make insulation better. It is observed in many cases that thermal insulation is offered by air gaps between the garment layers.

    However, the external temperature also influences the effectiveness of the insulation. The more extreme the temperature, be it very high or very low, the less effective the insulation becomes. Thus, a garment designed for its capability to protect against heat or cold is chosen by its wearer on the expectation of the climate in which the garment is to be worn.

    Though, a garment produced from a thick fabric will have more weight, and the freedom of movement of the wearer will be restricted. Clearly then a garment designed from an intelligent fabric, whose nature can change according the external temperature, can offer superior protection. However, such a garment must be comfortable for the wearer.

    Temperature change effect of PCMs PCM microcapsules can create small, transitory heating and cooling effects in garment layers when the temperature of the layers reaches the PCM transition temperature. The effect of phase change materials on

    There's No Place Like Home To Start A Women Owned Business
    Women are taking control of their financial destinies and careers by starting and running their own business. Women owned business opportunities are often of the work-at-home type due to several reasons.When you work from home, there is usually little start-up costs involved in getting your business going. You already have a living accommodation that can double as your office, so you save from paying office rental.There's the freedom to set your own work schedule. No more having a boss telling you what, when and how to do your work. You don't need to travel in bad weather or being stucked in a traffic jam.You don't have to pay childcare costs or travel expenses such as gas and automobile maintenance. Many women in business are deciding to work from home so that they can spend more time with their children and family.Potential SetbacksDue to the fact that you have the flexibility to set your own schedule, it can be very tempting not follow it at times. You may become distracted and lose track of time. This will put you behind in your work and set the stage for stress and aggravation. Other distractions, such as the television, radio or telephone can interfere with your ability to maintain a schedule and get your work completed on time.There may be household distractions such as the dishes that need to be washed or the floor that needs to be mopped and this is why it is important to prioritize. You can be distracted by friends dropping by unannounced to hang out because they don't understand that even though you are at home, you still have a business to run.Overcoming setbacksYou must cultivate a strong commitment and self-discipline when running a women home based business. Set your hours that you are going to work and stay as close to your schedule as possible. With a small child you can expect to have some unplanned interruptions so allow extra time for your projects to account for this. When the workday has ended, spend some quality time with your family even though you still have unfinished work.Don't overload yourself with work. Once in a while you may receive a big project that will take extra time, but keep this to a minimum. You don't want to do this on a regular basis where you are constantly struggling to keep up. Remember to tak
    apsulation gives a softer hand, greater stretch, more breathability and air permeability to the fabrics.

    Matrix coating during the finishing process: The PCM microcapsules are embedded in a coating compound like acrylic, polyurethane, etc, and are applied to the fabric. There are many coating methods available like knife-over-roll, knife-over-air, pad-dry-cure, gravure, dip coating and transfer coating.

    Foam dispersion: Microcapsules are mixed into a water-blown polyurethane foam mix and these foams are applied to a fabric in a lamination procedure, where the water is removed from the system by the drying process.

    Body and clothing systems The needed thermal insulation of clothing systems mainly depends on the physical activity and on the surrounding conditions such as temperature and relative humidity. The amount of heat produced by humans depends a lot on the physical activity and can differ from 100W while resting to over 1000W during maximum physical performance.

    Specially, during the cooler seasons (approx 0°C), the suggested thermal insulation is defined in order to make sure that the body is adequately warm when resting. At extreme activity, which is often a case with winter sports, the body temperature rises with enhanced heat production. To make this increase within a certain limit, the body perspires in order to withdraw energy from the body by evaporative cooling. If the thermal insulation of the clothing is decreased during physical activity, a part of the generated heat can be removed by convection, thus the body is not needed expected to perspire so much.

    The quality of insulation in a garment in terms of heat and cold will be widely managed by the thickness and density of its component fabrics. High thickness and low density make insulation better. It is observed in many cases that thermal insulation is offered by air gaps between the garment layers.

    However, the external temperature also influences the effectiveness of the insulation. The more extreme the temperature, be it very high or very low, the less effective the insulation becomes. Thus, a garment designed for its capability to protect against heat or cold is chosen by its wearer on the expectation of the climate in which the garment is to be worn.

    Though, a garment produced from a thick fabric will have more weight, and the freedom of movement of the wearer will be restricted. Clearly then a garment designed from an intelligent fabric, whose nature can change according the external temperature, can offer superior protection. However, such a garment must be comfortable for the wearer.

    Temperature change effect of PCMs PCM microcapsules can create small, transitory heating and cooling effects in garment layers when the temperature of the layers reaches the PCM transition temperature. The effect of phase change materials on

    The Important Function of Metal Stamping Dies
    Metal stamping dies are the devices used in metal stamping machines. Each metal stamping machine can have one or more than one dies depending on the kind of machine. Dies are the main components in metal stamping machines that do the actual casting, punching, cutting and shaping of the metal sheet.The basic die operations are drawing, shearing and bending. In metal stamping, the metal sheets are placed in a die or a press tool which has a specially designed cavity that gives the preferred shape to the metal sheet. The upper part of the die connects to the press slide while the lower component connects to the press bed. A specific component known as the punch pushes the metal sheet through the die, thus performing the actual shaping operation. The patterns on the dies can be used to emboss or give three-dimensional lettering on the final product.Dies are placed in sheet metal panels either alone or as a series of presses in a press line. Metal stamping dies and presses can have different input variables on the bases of tonnage, press parallelism, shut height, nitrogen pressure in dies, counterbalance pressure and press speed. These variables can influence the quality of the stamping panel, particularly during die setup. The same stamping press can be reused by replacing one set of dies with another.The placement of dies in a press is known as die setup. Die setup decides the shut height and binder force. The number of components produced in a die setup is known as a batch.There are many different kinds of dies such as single station dies, multiple station dies, compound dies, progressive dies and tandem press lines. Most dies are designed by the metal stamping companies who use advanced technologies like CAD to design them according to customer specifications. Another classification of dies is draw dies, trim dies and cam-pierce dies.
    of the clothing is decreased during physical activity, a part of the generated heat can be removed by convection, thus the body is not needed expected to perspire so much.

    The quality of insulation in a garment in terms of heat and cold will be widely managed by the thickness and density of its component fabrics. High thickness and low density make insulation better. It is observed in many cases that thermal insulation is offered by air gaps between the garment layers.

    However, the external temperature also influences the effectiveness of the insulation. The more extreme the temperature, be it very high or very low, the less effective the insulation becomes. Thus, a garment designed for its capability to protect against heat or cold is chosen by its wearer on the expectation of the climate in which the garment is to be worn.

    Though, a garment produced from a thick fabric will have more weight, and the freedom of movement of the wearer will be restricted. Clearly then a garment designed from an intelligent fabric, whose nature can change according the external temperature, can offer superior protection. However, such a garment must be comfortable for the wearer.

    Temperature change effect of PCMs PCM microcapsules can create small, transitory heating and cooling effects in garment layers when the temperature of the layers reaches the PCM transition temperature. The effect of phase change materials on the thermal comfort of protective clothing systems is likely to be highest when the wearer is frequently going through temperature transients (ie, going back and forth between a warm and cold environment) or from time to time touching or handling cold objects. The temperature of the PCM garment layers must vary frequently for the buffering effect to continue.

    The most obvious example is changing of water into ice at 0° and to steam at 100°. There are many products that change phase near body temperature and are now being integrated in fibres and laminates, or coating substrates, that will alter phase at or near body temperature and so support the equilibrium of the body temperature and keep it more constant. It is for athletes in extreme conditions and people who are involved in extreme sports such as mountaineering and trekking. It is going to be used in industrial applications where people are very mobile, for example, in and out of cool rooms.

    Effects on fabrics

    When the condensed PCM is heated to the melting point, it absorbs heat energy as it moves from a solid state to a liquid state. This phase change produces a short-term cooling effect in the clothing layers. The heat energy may come from the body or from a warm environment. Once the PCM has totally melted the storage of heat stops

    If the PCM garment is worn in a cold environment where the temperature is below the PCM's freezing point and the fabric temperature drops below the transition temperature, the micro encapsulated liquid PCM will come back to a solid state, generating heat energy and a momentary warming effect. The developers assert that this heat exchange makes a buffering effect in clothing, minimize changes in skin temperature and continue the thermal comfort of the wearer.

    The clothing layer(s) consisting PCMs must go through the transition temperature range before the PCMs change phase and either produce or absorb heat. Therefore, the wearer has to make some effort for the temperature of the PCM fabric to change. PCMs are transient phenomena. They have no effect in steady state thermal environment.

    Active microclimate cooling systems need batteries, pumps, circulating fluids and latest control devices to give satisfactory body cooling, but their performance can be adjusted and made to continue for long period of time. They are, however, costly and complicated. Present passive microclimate devices use latent phase change; either by liquid to gas evaporation of water (Hydroweave), a solid to liquid phase shift by a cornstarch/water gel, or with a paraffin that is contained in plastic bladders.

    The liquid evaporation garment is cheaper, but will only give minimum or short-term cooling in the high humid environment found in protective clothing. They must also be re-wetted to revitalize the garments for re-application. The water/ starch gel-type cooling garment is presently preferred by the military, and can offer both satisfactory and long time cooling near 32°F (0 degree Celsius), but it can also feel very cold to the skin and needs a very cold freezer (5°F) to completely recharge or rejuvenate the garment. When completely charged, its gel-PCMs are somewhat rigid blocks, and the garment has limited breathability.

    The other paraffin PCM garments are comparatively cheaper, but their plastic bladders can split, thus dripping their contents or leading to a serious fire hazard. In addition, their paraffin PCM melts about 65°F (18°C) and must be recharged at temperatures below 50°F (10°C) in a refrigerator or ice-chest. Their rate of cooling also reduces with time because paraffin blocks are thermal insulators and control the heat that can be transmitted into or out of them. The plastic bladders used to contain the PCM also strictly limit airflow and breathability of the garment, thus reducing their comfort.

    Uses of PCM

    Automotive textiles

    The scientific theory of temperature control by PCMs has been deployed in various ways for the manufacturing of textiles. In summer, the temperature inside the passenger compartment of an automobile can increase significantly when the car is parked outside. In order to regulate the interior temperature while driving the car, many cars are equipped with air conditioning systems; though, providing adequate cooling capacity needs a lot of energy. Hence the application of Phase Change Material technology in various uses for the automotive interior could offer energy savings, as well as raising the thermal comfort of the car interior.

    Apparel active wears

    Active wear is expected to provide a thermal equilibrium between the heat produced by the body while performing a sport and the heat released into the environment. Normal active wear garments do not satisfy these needs always. The heat produced by the body in laborious activity is often not discharged into the environment in the required amount, thus resulting in thermal stress situation. On the other hand, in the periods of rest between activities, less heat is produced by the human body. Considering the same heat release, hypothermia is likely to occur. Application of PCM in clothing supports in regulating the thermal shocks, and thus, thermal stress to the wearer, and supports in increasing his/ her efficiency of work under high stress.

    Lifestyle apparel - elegant fleece vests, men's and women's hats, gloves and rainwear.

    Outdoor sports - apparel jackets and jacket linings, boots, golf shoes, running shoes, socks and ski and snowboard gloves.

    From genuine uses in space suits and gloves, phase change materials are also used in consumer products.

    Aerospace textiles

    Phase Change Materials used in current consumer products primaril

    HTTP = HTML link (for blogs, profiles,phorums):
    <a href="http://www.casualarticles.com/article/20211/casualarticles-Pcm-In-Textiles.html">Pcm In Textiles</a>

    BB link (for phorums):
    [url=http://www.casualarticles.com/article/20211/casualarticles-Pcm-In-Textiles.html]Pcm In Textiles[/url]

    Related Articles:

    Beware the Syndromes-Heading Off Workplace Injuries

    Job Search Advice for Desperate Job Seekers

    Increase Your Chances of Repeat-Funding By Staying In Touch With Grant Makers

    Bookmark it: del.icio.us digg.com reddit.com netvouz.com google.com yahoo.com technorati.com furl.net bloglines.com socialdust.com ma.gnolia.com newsvine.com slashdot.org simpy.com shadows.com blinklist.com