Polypropylene fiber is the product name of polypropylene fiber, which is made from propylene as the raw material by polymerization and melt spinning. The production of polypropylene, which officially began in 1957, is a rising star in synthetic fibers. Because of the simple production process of polypropylene, low price, high strength, relatively low density and other advantages, polypropylene develops rapidly. Currently, polypropylene is the fourth largest variety of synthetic fibers. The production of polypropylene includes staple fiber, filament and split film fiber. The polypropylene film is made of polypropylene, which is then stretched to split into a network of the original fiber. Polypropylene is used in manufacturing industrial fabrics, non-woven fabrics, etc. Such as carpet, industrial filter cloth, rope, fishing net, building reinforced material, oil absorbing blanket and decorative cloth. On the civil side, polypropylene can be spun or blended with wool, cotton or viscose to make a variety of materials. In addition, polypropylene film fiber can be used as packaging material.

The main physical and chemical properties of polypropylene 1. The longitudinal plane of the shape polypropylene is flat and smooth and the section is round. 2. The biggest advantages of density polypropylene texture light, its density of 0.91 g/cm3 is a common chemical fiber density the lightest varieties, so the same weight of polypropylene higher coverage than other fibers. 3. High tensile strength, high tensile strength, high initial modulus and excellent elasticity. So polypropylene wear well. In addition, the wet strength of polypropylene is basically equal to dry, so it is the ideal material for making nets and cables. 4. Hygroscopic and chromic polypropylene absorbability is very small, almost non-hygroscopic, and the moisture regain in general atmospheric conditions is close to zero. But it has a pipe-sucking effect that can pass water vapor through the capillary tube in the fabric, but it doesn't have any absorption. The chromaticity of polypropylene is poor, the chromatogram is not full, but can use the method that the liquid colorization is used to make up the deficiency. 5. Acid and alkali resistance Polypropylene has good resistance to chemical corrosion resistance, in addition to the concentrated nitric acid, concentration of caustic soda, polypropylene fiber on the acid and alkali resistance performance is good, so is suitable for used as filtration materials and packaging materials. 6. Light resistance, etc.

It has poor light resistance, poor thermal stability, easy aging and ironing. But the anti-aging properties can be improved by adding anti-aging agent to the spinning. In addition, the electric insulation of polypropylene is good, but easy to produce static electricity when processing. What is polyester? Dacron is an important variety of synthetic fiber and is the name of the Chinese polyester fiber. It is pure terephthalic acid (PTA) and dimethyl terephthalate (DMT) and ethylene glycol (EG) as raw material through esterification and ester exchange and polycondensation reaction of fiber forming polymer, polyethylene terephthalate (PET), the spinning and aftertreatment fibers.

(2) what are the properties of dacron? 1. High strength. Short fiber strength is 2.6 ~ 5.7 cN/dtex, high strength fiber is 5.6 ~ 8.0 cN/dtex. Due to its low hygroscopicity, its wet strength is basically the same as that of dry state. The impact strength is four times higher than nylon and 20 times higher than viscose fiber. 2. Resilient. The elasticity is close to the wool, and when it is 5 to 6 percent, it is almost completely restored. Wrinkling resistance is more than other fiber, that is, the fabric is not creased, the dimensional stability is good. Elastic modulus is 22 ~ 141cN/dtex, 2 ~ 3 times higher than nylon. 3. Good heat resistance. 4. Good water absorption. 5. Good wear resistance. Resistance to abrasion is second only to that of the finest nylon, which is better than other natural fibers and synthetic fibres. 6. Good light resistance. Light resistance is second only to acrylic. 7. Corrosion resistance. Bleaching agent, oxidizer, hydrocarbon, ketone, petroleum products and inorganic acid. The alkali is not afraid of mold, but it can be decomposed. 8. Poor dyeing. What are the main types of dacron? The types of dacron are short fibers, stretch yarn, textured yarn, decorative filament, industrial filament, and various differential fibers. (4) what kinds of staple fiber do you have? 1. According to the physical properties of distinction: strong in high strength low stretch type, type, low in the reach, high modulus, with high strength and high modulus type 2. According to the requirements of processing after the distinction: cotton, wool, linen, silk type 3. According to the purpose to distinguish: clothing, xumian, decorative, industrial 4. According to the function to distinguish: cationic dye, moisture absorption, flame retardant, non-ferrous, pilling resistance, antistatic 5. According to the fiber cross section to distinguish: silk, hollow yarn. What are the varieties of polyester filament? 1. At the beginning of raw silk: undrawn yarn (conventional spinning) (UDY), half a preliminary orientation (medium speed spinning) (she), pre orientation (high speed spinning) (xiamen) wire, high orientation (ultra high speed spinning) (HOY) 2. The drawn yarn: drawn yarn (low speed wire drawing) (DY), FDY (spin-draw step method) (polyester FDY such), all silk (spinning step method) (FOY) 3. Textured yarn: regular textured yarn (DY) and draw textured yarn (DTY), air textured yarn (ATY).

The main products of polypropylene include staple fiber, filament, nonwoven fabric, tobacco and bulk continuous filament (BCF), which are used for packaging, cigarette filter, carpet, non-woven fabric, clothing and other products. In addition to taking, industrial use of polypropylene is the most active market, and consumption growth in medical and health materials is also fast.

Polypropylene fabrics have the advantages of high strength, small density and good corrosion resistance. Polypropylene fabric defect is: owing to the polypropylene is the height of the neat rows of crystals, polar groups, from the point of view of its structure and no has the ability to respond to the group, plus the moisture absorption rate is very small, so the difficulty of dyeing. It can solve the problem of dyeing hard by using raw liquid colouring spinning. In addition, the light resistance of polypropylene is poor. Polypropylene is in high temperature season, after the long exposure of sunlight, easy to age, and the strength is reduced. Especially when it's wet, it's more serious. Therefore, the polypropylene fabrics and blended fabrics should not dry in the sun after washing, to dry in a cool and ventilated place. Polypropylene is easy to age at high temperature, so the thermal stability of fiber is not good enough.

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Polypropylene fabrics

The polypropylene fabric has pure spinning, blending and interweaving, among which, blends and interwoven fabrics are more closely matched with cotton fiber, such as c/cotton muslin, propylene/cotton colored yarn, etc. A pure polypropylene fabric is represented by a parka.

(1) polypropylene fiber fabric

1. Pat pat topcoat topcoat?? Is a dope shading polypropylene looped yarn weaving wool-like fiber fabric, has a unique face loop style, colour and lustre is bright beautiful, its light and warmth, MAO sense is strong, its biggest advantage is washable quick-drying. Suitable for youth clothing and children's coats.

2. The superfine fiber fabrics with superfine polypropylene and polyester FDY such draw textured yarn (DTY) as raw material, made of knitted or woven fabrics, applicable to the production of high-grade clothes, T-shirt, underwear, pajamas, wearing all kinds of fashion and socks, etc. It can also be used in bedding, decorative materials (curtains, table cloth), towels, hats and medical supplies.

(2) polypropylene blended fabric

Polypropylene fiber is suitable to be blended with cotton or viscose fiber into various fabrics. At present, the polypropylene fabric produced in our country has 35% cotton, 65% propylene/cotton colored linen yarn. Polypropylene and cotton each account for 50% cotton/propylene cloth or white cloth.

1. Propylene/cotton colored yarn is made of propylene/cotton (65/35) yarns. It has strong wear resistance, strong appearance and good dimensional stability. Use as a military raincoat, mosquito net, etc.

2. The appearance of c/c/cotton fine cloth/cotton fine cloth, with small shrinkage, strong and durable, has the advantages of easy to wash and quick drying, and has the style of polyester/cotton fabrics. The price is much cheaper than the polyester/cotton fabric.

Polypropylene is limited to some extent, in terms of taking the polypropylene is mainly used for carpets, including carpet backing and suede), decorative cloth, geotextile, non-woven cloth, rope, belt, fishing nets, construction materials, packaging materials, etc. The polypropylene nonwoven fabric is notable for the large number of applications of baby diapers and women's sanitary pads. Made from the hollow fiber of polypropylene fiber, it is light, warm and elastic.