1. Polyester: Polyester is an important variety of synthetic fibers, is the trade name of polyester fiber in China.
It is refined terephthalic acid (PTA) or dimethyl terephthalate (DMT) and ethylene glycol (EG) as raw materials by esterification or ester exchange and polycondensation reaction and the production of fibre-forming polymers - polyethylene terephthalate (PET), by spinning and post-processing of fibers made. Polyester has a wide range of uses, and is used in large quantities in the manufacture of clothing fabrics and industrial products.
Polyester has excellent shaping properties. Polyester yarn or fabric after shaping the generation of flat, fluffy form or tucks, etc., in the use of many times after washing, can still be durable.
Performance 1, high strength. The strength of short fiber is 2.6~5.7cN/dtex, and the strength of high fiber is 5.6~8.0cN/dtex.
Because of the low moisture absorption, the wet strength is basically the same as the dry strength. The impact strength is 4 times higher than nylon and 20 times higher than viscose fiber.
2, good elasticity. The elasticity is close to wool, and can be almost fully recovered when elongated by 5%~6%.
Wrinkle resistance exceeds other fibers, that is, the fabric is not wrinkled, good dimensional stability. The modulus of elasticity is 22~141cN/dtex, 2~3 times higher than nylon.
3, good heat resistance. 4, polyester surface smooth, internal molecular arrangement of close, intermolecular lack of hydrophilic structure, so the moisture return rate is very small, poor hygroscopicity.
5, good abrasion resistance. Abrasion resistance is second only to the best wear-resistant nylon, better than other natural fibers and synthetic fibers.
6, good light resistance. Light resistance is second only to acrylic.
7, corrosion resistance. Resistant to bleach, oxidizers, hydrocarbons, ketones, petroleum products and inorganic acids.
Resistant to dilute alkali, not afraid of mold, but hot alkali can make it decompose. 8, poor dyeing 2. Spandex: spandex fiber is the abbreviation of polyurethane fiber, trade names are Lycra (Lycra, the United States, Britain, the Netherlands, Canada, Brazil), Neolon (Neolon, Japan), Dorlastan (Dorlastan, Germany) and so on.
It was first successfully researched by Bayer in 1937, and DuPont started industrialized production in 1959. At present, there are nearly 40 factories, seven lines of production, the total annual output of about 100,000 tons, China's existing production capacity of about 10,000 tons.
Spandex is a synthetic fiber, composed of substances containing more than 85% of the components of polyurethane. Spandex fiber *** there are two varieties, one by the aromatic bis-isoaminoacidase and contains hydroxyl polyester chain segment mosaic **** polymer (referred to as polyester-type spandex), the other by the aromatic bis-isocyanate and contains hydroxyl polyether chain segment mosaic **** polymer (referred to as polyether-type spandex).
Spandex fibers with elastic polyolefin fibers and elastic composite fibers collectively referred to as elastic fibers. Synthetic fibers with high elongation at break (more than 400%), low modulus and high elastic recovery.
The Chinese trade name for multiblock polyurethane fibers. Also known as elastic fiber.
Spandex has high elongation (500%~700%), low modulus of elasticity (200% elongation, 0.04~0.12 g/dan) and high elastic recovery (200% elongation, 95%~99%). In addition to greater strength, other physical and mechanical properties are very similar to natural latex yarn.
It is more resistant to chemical degradation than latex yarn, has a moderate thermal stability, softening temperature of about 200 ℃ above. Most of the dyes and finishing agents used for synthetic and natural fibers are also suitable for dyeing and finishing of spandex.
Spandex is resistant to sweat, seawater and a variety of dry cleaning agents and most sunscreens. It will fade with prolonged exposure to sunlight or chlorine bleach, but the degree of fading varies greatly with the type of spandex.
The spandex fiber has such a high elasticity because its polymer chain is composed of low melting point, amorphous "soft" chain segments as the parent and high melting point, crystalline "hard" chain segments embedded in it. Flexible chain segments of the molecular chain to a certain crosslinks to form a certain mesh structure, due to the small interaction force between the molecular chain, can be free to stretch, resulting in a large elongation properties.
Rigid chain segment molecular chain binding force is relatively large, the molecular chain will not be unlimited elongation, resulting in high resilience. Radon filament cross-section is mostly dog-bone-shaped (dog-bone-shaped), but there are some filaments with smooth or serrated surface.
Fracture strength in all textile fibers is the lowest, only 0.44 ~ 0.88CN / dtex (polyether type strength is higher than polyester type). Moisture absorption range is small, generally 0.3-1.2% (compound silk moisture absorption rate is slightly higher than monofilament).
Heat resistance varies greatly depending on the species, most of the fibers in the range of 90 ~ 150 ℃ for a short period of time, the fiber will not be damaged, the safe ironing temperature of 150 ℃ or less, can be warmed up to interfere with the wet wash. Dyeing performance is better, can be dyed into a variety of Dun color, dyes on the fiber affinity, can be adapted to the majority of varieties of dyes, and has a good chemical resistance, resistance to most of the acids and alkalis, chemicals, organic solvents, dry cleaning agents and bleach, as well as resistance to sunlight and wind and snow, but does not tolerate oxides, easy to make the fibers turn yellow and strength reduction.
Spandex is generally not used alone, but a small amount of mixed into the fabric. This fiber has both rubber properties and fiber properties, most used in spandex as the core yarn core yarn, known as elastic core yarn, the main features of this yarn, one can get a good feel and appearance, composed of natural fibers to the outer fiber moisture absorption is good; two is only 1-10% of spandex filament can produce high-quality elastic yarn; three is the elasticity percentage control range from 10% to 20%, can be used in different applications. Thirdly, the elasticity percentage can be controlled from 10% to 20%, and different elasticity values can be selected according to the usage of the products.
It is easy to spin 25~2500 denier yarns of different thicknesses, so it is widely used to make elastic knitted fabrics, such as hosiery, furniture covers, ski jackets, sportswear, medical fabrics, belts, munitions equipment, and elastic parts of astronauts' suits, etc. With the new demands on fabrics, people are looking for a new way to produce elastic yarns. As people put forward new requirements for fabrics, such as light weight, wearing a comfortable fit, soft texture, etc., low-fiber spandex fabrics in synthetic fabrics accounted for a growing proportion.
There are also spandex naked silk and spandex and other fibers combined twisted twisted silk, mainly used for a variety of warp knitting, weft knitting fabrics, woven fabrics and elastic fabrics, etc. 3. carding: carding is the use of cover-type or roller card, with the aid of the needle surface movement, combing small bundles of cotton into a single-fiber state, and further removal of impurities and non-spinnable staple fibers, so that the fibers parallel to straighten the last made of sliver coiled into the cylinder. Sliver disk into the cylinder.
4. Cotton: 1. Cotton fabrics Cotton fabrics are woven from cotton yarn, fabric varieties, different colors. Cotton fabrics, breathable, hygroscopic, comfortable to wear, but there is a prominent disadvantage - warp.
2. Knitted fabric shrinkage test process (method \ time \ dry way)
and everyone to discuss. There are incorrect or insufficient places, welcome to put forward Oh
First of all, and the fiber is definitely related. But there's no聼 said such related knowledge (----- this is my reply to Midnight Cat. That's my reply to Midnight Cat), so maybe I just haven't heard it (I'm not very knowledgeable).
Shrinkage is controllable: dry-steam a typical fabric and wash it. Then you can calculate the shrinkage rate! Measured and calculated, the data provided to the master paper pattern, they refer to the appropriate amount of release. It is OK.
The above is the basic process.
The specific practice is (I mainly say the following dry steaming and washing):
A: dry steaming ------ is also above the fish said "hot shrinkage"
1) in the fabric to be measured and calculated (to be large enough), draw a fixed length and width of 2 pieces, ------ take knitted underwear, the general 40 * 40CM can be. General 40 * 40CM can be, meant to leave about 2CM above the seam allowance, because underwear (~ like ***), the area is not large, but the shrinkage of knitted fabric and a lot. Like spandex, modal, etc., if the shape is not set properly, it may shrink horribly.
2) will be the 2 pieces of drawing a good fixed size of the fabric opposite, with a flat car in the drawing of the traces of the car, so that the front of the fabric on the road outside, but also easy to look at the color difference, color fastness, and so on, to save material. When you stay out along the 2CM above the sewing position with a locking machine to lock the edges.
3) Now comes the key moment of dry steaming! Take this piece of cloth to the ironing place to steam it! Pay attention to grasp the time . General knitted fabrics about 5 minutes on the OK. Shrinkage of large fabrics you can also see with the eyes in the steam when it shrinks it! Hey ... That kind of fabric is not good!
Special attention Oh:: steam, do not let the iron and fabric contact! That is to say, not to people ironing clothes like to iron this piece of cloth! But the distance should be far away from the cloth! One inch or so! That's good. But also at any time to give it doubled over, moving position, so that the heat is uniform, can be calculated accurately! Also, try to open the machine's suction ...
4) Steam finished, get a ventilated place to dry it, please note that not to get the sun dry oh! This calculation is also ineffective!
5) After drying is calculated, pay attention to the distribution of material in the direction of the warp and weft. Warp direction is also straight yarn, dimensional direction on the yarn across the yarn. (The exception is twill) For example: the warp is now shrinking to 38CM, take is 38-40=2 /40=0.05*100%=5%. That is to say, the shrinkage rate of the warp direction of this fabric is 5%.... Dimension to the calculation of hair is also the same>>
6) Finally, dry steam this part is basically finished. In addition to providing the data to the paper sample side, the other thing to do is to keep your original sample (aka test fabric)...
Now we come to B: washing: . (Again, take knitted fabric as an example, because what I did in my previous company was knitted,)
The previous steps are the same as 1) and 2) of dry steaming above, and also the same test samples are made....
3) washing, it is more complicated . It's not the algorithm for wash shrinkage that's complicated, it's the fact that there are so many ways to wash it!
But these are based on the characteristics of the fabric and customer requirements! Here are a few names for washing shrinkage:
Dry Cleaning
Machine Washable
Commercial Wash Do not have mercially Launder
Home Launder
Hand Wash Wash
Cold Wash
Warm Wash
Hot Wash
Hot Wash
Focus on machine washing, machine washing, although only you press the button to operate, but the time should be selected, the previous company has a special test washer used to do the test, not the kind of home. Different time and washing method to wash out the fabric shrinkage is not the same!
According to the time to be divided, generally have a standard wash, family wash, ultra-short wash, extended wash, immersion wash ... different machines have different say.
Above the various washing methods, but also according to the guests and fabric characteristics of the need to choose in the washing process whether to use the drum,? How much water temperature? Whether to dry (generally do the fabric shrinkage can not be dried, do the finished product test can be ...) etc. .....
4) After washing, generally air dry, do not sun dry!
5) Calculate the shrinkage rate, and the same algorithm as the previous dry steaming. Under normal circumstances, the fabric dry steam shrinkage is smaller than the shrinkage of the wash....
6) Do the same as before.... Provide the results in writing to the technical department for your own records...
3. Hello, I would like to know about the relevant knowledge of clothing fabrics, such as pure cotton, combed cotton,
Only say the market commonly used for clothing fabrics, raw materials, special raw materials are no longer discussed
1 pilling. Theoretically, long fibers are not pilling. So polyester and nylon, viscose fiber long fiber as raw material fabrics will not be pilling. However, the raw materials of these ingredients can also be made of short fiber, or long fiber raw materials of fabrics made of abrasion, scratching and other hair treatment (hair treatment is the destruction of the fibers, out of the hair are disconnected from the fibers), this time it will be pilling, due to the raw materials of synthetic fibers after friction static electricity is very strong, so the degree of hairball will be very strong. Cotton is a staple fiber, although the hairball, but not as easy as chemical fiber static electricity, so the degree of hairball to light.
2 Washing deformation. Viscose fiber is the most easily deformed. Cotton is okay, as long as the shaping and finishing is not a big problem, and the fabric organization is not part of the easy deformation of the weave, not big deformation. Other polyester, nylon is not easy to deform.
3 Shrinkage rate Viscose shrinkage is the most powerful, all viscose knitted fabric, shrinkage often exceed 10%. Others, such as cotton, polyester, nylon are okay. Conventional fabrics can be controlled within 3%
4 Elasticity. Needless to say, Lycra is spandex, the most elastic. Polyester according to different spinning and processing methods, the degree of elasticity can vary greatly. Other fibers are less elastic.
5 yellowing and fading Strictly speaking, yellowing and fading are two concepts. Yellowing is the color change, fading is the color fastness strength. Polyester is the best, the other not far behind. But cotton and several other fibers than, dyeing vividness is quite inferior.
6 moisture absorption cotton and viscose fiber is the best, viscose is better than cotton. Other fibers are almost non-absorbent (except for special treatment)
7 breathability Needless to say, cotton is the best, the other are not. Relatively speaking, viscose is slightly better.
Why didn't you mention Lycra earlier? Lycra is actually a brand name. Is the first production of elastic fibers DuPont (now DuPont management Lycra of this department sold, the new company called Invista) for their elastic fibers ---- spandex fibers registered trademark. Now non-Lycra spandex fibers, but due to Lycra brand promotion, and is the first, many people will Lycra as an elastic fiber spandex synonymous with Hong Kong people Cantonese people like to call elastic fibers as "pull frame", but also Lycra (LYCRA) of the Cantonese translation.
The elastic fiber spandex, just to increase the elasticity of the fabric and a small amount of spinning other yarns to weave, basically in the fabric composition accounted for a small proportion of the fabric above the physical properties of the impact is not great (in addition to the elasticity and shrinkage, there is a little bit of spandex shrinkage). So the front not to mention spandex.
To add, chemical fibers, synthetic fibers and other non-natural fibers, can be made in the form of staple fiber and long fiber form, staple fiber form, physical properties, feel and so on will be closer to the long fiber form than the short natural fibers (chemical characteristics of the basic long staple fibers have nothing to do).
4. How to test the fabric, specifically what kind of test standards
1), the color difference exceeds the permissible range
2), the continuity of the pilling, or obvious folds or repair marks
3), the specification error +- more than 5% of the printing blemish (refers to the regularity or batch) finished product specifications do not meet
4), the length less than 25 Yards of knotted yarn more than 1 place, in large quantities allowed more than e799bee5baa6e997aee7ad9431333431366366 knotted yarn but its spacing shall not be less than 25 yards of uncooked cotton or bad cotton affect the appearance of the finished product.
5), knotting yarn distance of less than 25 yards have obvious color difference, appearance, specifications, density, soft are, cloth edge, color.
Expanded:
Four-point scale:
This scoring method is mainly used for knitted fabrics, but can also be applied to woven fabrics. The basic concepts and patterns of the "4-point scale" and the "+point scale" are very similar, except for the difference in the number of points awarded for defects. The evaluation method is the same as the "+ point system", the inspector checks the defects of each fabric according to the defect scoring standard, records them on the report form, and gives the penalized score as the evaluation of the grade of the fabric.
1. Points are awarded according to the length of the defects.
1 point for 1"-3" 3"-6" 2 points.
3 points for 6"-9" 4 points for more than 9".
2. The scoring principle of defects:
A. All the defects in the same code in the direction of the warp and weft of the deduction of no more than 4 points.
B, the hole is not asked the size of the deduction of 4 points.
C. No points will be deducted within one inch of the edge of the fabric.
D. Continuous defects must be cut or downgraded.
E, any hole larger than a pinhole will be deducted 4 points.
F, on the warp or weft, no matter what defects, the principle of visible, and according to the defects scoring to give the correct deduction.
G, except for special provisions (such as coating on the rubberized fabric), usually only need to check the front of the cloth.
Baidu Encyclopedia - Textile Fabrics
5. bag material fabric knowledge
Bag material is generally divided into the main material, accessories, the main material can be divided into: the composition of the fabric: the glue Yarn: the definition of the number of deniers of the yarn (fixed-length): take the length of 9,000 meters of the yarn, if the weight of the 70G called 70D If the yarn weighs 70G, it is called 70D; if it weighs 210G, it is called 210D, and so on. The higher the denier, the thicker the yarn, and the thicker the cloth (usually used for long fiber yarns). Definition of yarn count: take 1 pound of yarn, its length is 840 yards of several times the length of the yarn, that is called several yarn, if the length of 840 yards of 10 times the length of the yarn that is called 10, if there are 840 yards of 20 times the length of the yarn that is called 20, and so on, the larger the number of counts indicates that the yarn is more fine (usually used for short staple fiber yarns). Types of yarn A. According to the material points: 1. natural fibers: 1) plant fibers: cotton (COTTON) hemp (JUTE, LINEN, RAMIE) 2) animal fibers: wool (WOOL) silk (SILK) 2. synthetic fibers: nylon (nylon) (NYLON) TETRON (polyester) (POLYESTER also known as TETRON) acrylic (ACRYLIC) polypropylene (POPPYLIC) ACRYLIC) Polypropylene (PP) Polyethylene (PE) 3. Man-made fibers: Rayon (RAYON), also known as rayon Rayon (VISCOSE) 4. Blended fibers: long/staple fiber blended yarns, there are two kinds of T / R T / C B. To the brightness of the points: semi-glossy yarn / glossy yarn / triangular bright yarn C. To the processing of the points: 1. Raw silk (unprocessed): UDY (non-extension) POY (semi-extension) FOY (full extension) FOY (full extension) 2. processed silk 3. spinning yarn 4. wrapped yarn D. by the number of strands of yarn: single strand double strand multi-strand Yarn material differentiation: 1. Cotton: immediate combustion, flame stabilization, gradual extinguishing, white smoke, burnt smell, gray ash, SOFT. 2. Rayon: immediate combustion, flame stabilization, immediate extinguishing, white smoke, burnt smell, no ash, SOFT. 3. nylon: first shrinkage Curl melting, gradually burning, raw white smoke, like celery flavor, gray hard lumps, glossy.4. Tetrolon: first contraction curl melting, gradually burning, raw black smoke, foul smell, black hard lumps, no luster.5. PE:: first contraction curl melting and then immediately after the combustion, raw black smoke, paraffin flavor, yellowish-brown hard lumps.6. PP: first melting and then quickly burning, flame jumping, raw black smoke, pungent flavor, black irregular hard lumps . Blanket: A. According to the weaving method (different looms): 1. Knitted Fabric: Mesh Fabric Meijia Fabric Plush Shearling Abrasion-resistant Fabric KEVLA L LYCRA. 2. Flat Knitted Fabric: Taffeta Oxford CORDURA BALLISTIC. 3. Twill Fabric: 3/1 Twill 2/2 Twill Large Twill Cross Jacquard Plaid Fabric Satin Fabric 4. Jacquard Fabric: Color Yarn Plaid Cabinet Fabric LOGO Jacquard Bed Sheet Table Cloth 5. 5. non-woven fabric: Lixin cloth needle ginned cotton (pay attention to the thickness / yardage weight / grain / color) plain weave, twill, jacquard are woven by the warp and weft yarns up and down the cross woven into its fabric structure. Different materials/numbers of warp and weft yarns and different weaving methods can produce a variety of different specifications. Its specifications are expressed as follows: 420D (warp denier)*420D (weft denier)/50T (warp yarns)*36T (weft yarns) Knitted fabrics are made of warp and weft yarns that are knitted together by means of thread loops and are usually classified into two types of knitted fabrics: warp knitted fabrics and weft knitted fabrics. The specifications are often expressed in terms of denier/yard weight/width. Common specifications of nylon fabric: 70D: 70D*170T+PU1 70D*190T+0.3MM PVC 70D diamond check+PU2+WR/210D:210D*116T+PU1 210D*116T+PU2 210D*118T+0.35MM Plain PVC420D:420D*86T+PU2 420D*86T+0.4MM PVC420D: 420D*86T+PU2 420D*86T+0.4MM PVC420D: 420D*86T+PU2 420D*86T+0.4MM PVC420D: 420D*86T+PU2 86T+0.4MM PVC 420D big diagonal+PU2+WR 420D cross jacquard PU2+WR840D+PU2/PVC 1680D+PU2/PVC CORDURA:500D+PU2+WR/PVC 1000D+PU2+WR/PVC Common Specification of TETRON Fabric:75D Printing Fabric+0.3MM PVC 150D herringbone slant+PU1 300D*110T+PU2/0.3MM PVC600D*300D*64T+0.5MM PVC 600D*64T+0.55MM PVC 600D*76T+PU2+WR1200D+PU2+WR/0.6MM PVC 1800D+0.65MM PVC Other commonly used fabric types Specification: 1. PP cloth: 1000D PP plain weave + PU2+WR 1200D PP twill + PU2+WR 350D PP twill + PU2+WR The characteristics of PP cloth are light weight, good fastness and color fastness, good strength and heat resistance, anti-staining, anti-bacterial, and can be decomposed naturally. 2. PE lamination cloth: also known as PE plastic cloth is PE plain weave cloth with PE lamination on the top and bottom sides. 3. Warp and weft yarn mixed fabric: 420D*300D N/T two-color cross jacquard + PU2 (two-color effect) T / linen: 300D*12'S/2 + 0.4MM PVC (imported into the U.S. tariffs are lower) Dyeing and finishing process: embryo cloth → coloring → fabric matching → fabric rolling → casting dyeing (fading / refining / dyeing) → stereotypes (resin / splash) → packaging and then sent to the printing / gluing or Gluing 1. coloring is to be considered after processing paste PVC 2. dyeing is divided into room temperature (nylon) high temperature (tetoron / plain weave / crinkle cloth), to pay attention to color fastness (sunlight / washing / friction / ultraviolet resistance) and non-azo dyes (Europe **** the same body requires that all the fabrics can not contain azo dyes) 3. will be dyed out of the color of the fabric into the shaping machine, the high temperature of 140 ~ 190 ℃ will be the organization of the yarn is fixed to control the width, hand feel (resin / splash) → packaging after sending printing / gluing or Control the width, feel (add resin), and do splash or fireproof processing.4. Color fabrics are processed after completion of the following: 1). Printing: ink (roller printing) paste printing (rotary printing) paper printing (thermal transfer) automatic screen 2). Heat Pressing: High-temperature engraved roller to contact the cloth surface to form a pattern 3). Abrasion/pilling/brushing: Use sandpaper/needle/brush to contact the cloth surface to form a fluffy feeling 4). Gluing: in the cloth coated with an average layer of glue (PU/ULY/color glue/waterproof and moisture permeability), in order to achieve the effect of waterproofing/fixing yarn and reinforcement, pay attention to the requirements of the waterproof and moisture permeability, the surface of the glue haze and the feel must not be too hard. 5). Adhesive: mainly divided into PVC adhesive / CPU adhesive (i.e. EMB adhesive) / TPE adhesive / FLEX adhesive and so on several (1). PVC adhesive: PVC film and cloth laminated to achieve the effect of waterproofing, yarn-fixing and reinforcing, pay attention to the feel / texture / thickness / cold-resistant low-toxicity. (2). CPU adhesive: the CPU adhesive to film the way evenly coated on the cloth surface can also achieve the same waterproofing/reinforcement/fixed yarn effect. With low toxicity, natural decomposition and combustion does not produce toxic gases and other environmental characteristics, pay attention to the feel / texture / adhesive color / cold resistance and other requirements. (3).TPE/FLEX glue: the most environmentally friendly glue to replace PVC/EMB glue, TPE glue is softer. 4). Lamination: refers to the cloth and PU foam / EVA / sponge laminated together to achieve the role of reinforcement or other functional (padding / thermal insulation / pressure resistance) Leather can be divided into: A. Natural leather: (composition of the elements: thickness / grain / light haze / color or translucent dyeing) 1. Cowhide: Genuine Leather (first layer of leather) for leather shoes / leather jackets / high-grade leather.
6. How to calculate the material used in clothing
The formula for calculating fabric: fabric price = yarn price + weaving price + dyeing price + other (including printing, opening vice shaping, after the process)
The material used in tops:
Material used in the big body: (chest + 6CM) X (body length + 6CM) X 24 X grams X (1 + total loss)
Sleeve material: (shoulder + cuff + 4CM) X (sleeve length + 4CM) X 24 X grams X (1+total loss)
Collar material: (collar width X2+2) X collar height X 12 X grams X (1+total loss)
Material per dozen clothes = material for the big body + material for the sleeves + material for the collars
Material for pants:
(crossover + leg circumference +4CM) X (pants length +8CM) X 24 X grams X (1+total loss)
Expanded Information: Types of fabrics: 1, cotton is the general term for all types of cotton textiles. Cotton is divided into cotton, cotton and other varieties. It is mostly used to make fashion, casual wear, underwear and shirts. Its advantages are easy to keep warm, soft and close to the body, moisture absorption, breathability is very good. Its shortcomings are easy to shrink, easy to wrinkle, the appearance is not quite beautiful, in wearing must be ironed from time to time. 2, hemp cloth is hemp, flax, ramie, jute, sisal, banana hemp and other hemp plant fiber made of a fabric. It is generally used to make casual wear, work wear, and more often than not, it is used to make ordinary summer clothes. Its advantages are high strength, moisture absorption, thermal conductivity, breathability is very good. Its disadvantage is that it is not very comfortable to wear, the appearance of more rough, hard. 3, silk is the silk as the raw material woven from a variety of silk fabrics. Like cotton, it has many varieties and different personalities. It can be used to make a variety of clothing, especially suitable for the production of women's clothing. Its strengths are light, fit, soft, smooth, breathable, colorful, glossy, noble and elegant, comfortable to wear. Its shortcomings are prone to wrinkles, easy to absorb the body, not strong enough, fading faster. 4, tweed Also known as wool, it is a variety of wool, cashmere woven into the fabric of the general term. It is usually applied to the production of dresses, suits, coats and other formal, high-grade clothing. Its advantages are wrinkle-resistant and wear-resistant, soft touch, elegant and straight, elasticity, warmth. Its main disadvantage is that it is more difficult to wash, not very suitable for the production of summer clothing. 5, leather is tanned animal fur fabrics. It is mostly used to make fashion, winter clothing. Can be divided into two categories: one is leather, that is, after the dehairing of leather. The second is fur, that is, treated leather with fur. Its advantage is light and warm, elegant and luxurious. Its disadvantage is that the price is expensive, storage, care requirements are high, so it is not popular. 6, chemical fiber is the abbreviation of chemical fiber. It is the use of polymer compounds as raw materials for the production of fibers made of textiles. Usually it is divided into artificial fibers and synthetic fibers of two categories. They **** the same advantages are bright colors, soft texture, drape, smooth and comfortable. Their shortcomings are abrasion resistance, heat resistance, moisture absorption, breathability is poor, easy to heat deformation, easy to produce static electricity. Although it can be used to produce various types of clothing, but the overall grade is not high, difficult to reach the hall of elegance. 7, blended Natural fibers and chemical fibers in accordance with certain ratios, mixed textile fabrics, can be used to produce a variety of clothing. Its strengths are both absorbed cotton, hemp, silk, wool and chemical fiber advantages, but also as far as possible to avoid their respective shortcomings, and relatively inexpensive in value, so popular. 8, Modal Modal (Modal) is a high wet modulus viscose fiber cellulose regeneration fibers, the raw material of the fiber using the European beech wood, the first to be made of wood pulp, and then processed into fibers through a special spinning process . The raw materials of this product are all natural materials, harmless to the human body, and can be naturally decomposed, harmless to the environment. Modal fiber is characterized by combining the luxurious texture of natural fibers with the practicality of synthetic fibers. It has the softness of cotton, the luster of silk, the smoothness of hemp, and its water absorption, breathability are better than cotton, with a high dyeing rate, the fabric color is bright and full. Modal fiber can be blended and interwoven with a variety of fibers, such as cotton, hemp, silk, etc., in order to enhance the quality of these fabrics, so that the fabrics can remain soft and smooth, and give full play to the characteristics of their respective fibers to achieve a better use of the effect.