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Overview
The Chinese brand name for synthetic fiber isotactic polypropylene fiber obtained by using propylene, a by-product of petroleum refining, as a raw material. Also known as polypropylene fiber. The source of raw materials is abundant, the production process is simple, and the price of the product is relatively cheaper than other synthetic fibers. The physical and mechanical properties of the fiber are: high strength (4-6 g/denier staple fiber, 5-8 g/denier filament), almost the same wet strength and dry strength, small specific gravity (0.91), and abrasion resistance Corrosion and so on. The annual production of polypropylene fiber in the world has exceeded 1 million tons in 1980. Polypropylene varieties include filaments (including undeformed filaments and bulky deformed filaments), staple fibers, tantalum filaments, fissured fibers, hollow fibers, shaped fibers, various composite fibers, and non-woven fabrics.
The main purpose is to produce carpets (including carpet base and suede), decorative fabrics, furniture fabrics, various ropes, strips, fishing nets, oil-absorbing felts, building reinforcement materials, packaging materials and industrial fabrics, such as filter cloths, bag cloths. Wait. In addition, the use of clothing has become increasingly widespread, and can be mixed with a variety of fibers made of different types of blended fabrics, after knitting can be made into shirts, coats, sportswear, socks and so on. The quilt made of polypropylene hollow fiber is light, warm, and elastic.
Polypropylene does not contain chemical groups that can bind to dyes in macromolecular structures, so dyeing is difficult. The melt coloring method is usually adopted. The pigment preparation and the polypropylene polymer are uniformly mixed in the screw extruder, and the color fastness of the colored fiber is obtained after melt spinning. Another method is to copolymerize or graft copolymerize with acrylic acid, acrylonitrile, vinylpyridine, etc. to introduce a polar group that can bind to the dye on the polymer macromolecule, and then dye it directly by conventional methods. In the production of polypropylene, it is often necessary to add various additives to improve dyeing, lightfastness, and flame resistance. The scientific name of polypropylene fiber, near the flame that is melted down, flammable, slowly burning from the fire and black smoke, the flame is yellow on the top, the lower end of the blue, emits the flavor of oil, burned after the ash is a hard round light yellow-brown particles, handcuffs fragile .
It is a fiber made from propylene as raw material by polymerization and melt spinning. Polypropylene officially began its industrial production in 1957 and is a rising star in synthetic fibers. Because polypropylene has the advantages of simple production process, low cost, high strength, and relatively light density, polypropylene has developed rapidly. At present, polypropylene is the fourth largest variety of synthetic fibers and the lightest fiber among common chemical fibers.
Polypropylene production includes short fibers, filaments, and split fibers. Polypropylene membrane fibers are made by first forming polypropylene into a film and then stretching the film to split it into a fibril network. Civil use: It can be used for pure spinning or blending with wool, cotton or viscose fiber to make a variety of fabrics. Can be used to weave various kinds of knitwear such as hosiery, gloves, knitwear, knit trousers, dish cloth, mosquito net cloth, wadding, warm stuffing, wet diapers and so on.
Industrial uses: carpets, fishing nets, canvases, hoses, concrete reinforcements, industrial fabrics, non-woven fabrics, etc. Such as carpets, industrial filter cloth, ropes, fishing nets, building reinforcements, oil-absorbing blankets, and decorative fabrics. In addition, polypropylene film fibers can be used as packaging materials.
The main physical and chemical properties of polypropylene. Morphology The vertical surface of polypropylene is flat and smooth with a circular section. 2. Density The biggest advantage of polypropylene is its light texture. Its density of only 0.91g/cm3 is the lightest density among common chemical fibers, so polypropylene with the same weight can get higher coverage than other fibers. 3. Strong stretch Polypropylene has high strength, large elongation, high initial modulus, and excellent elasticity. Therefore, polypropylene wear resistance is good. In addition, the wet strength of polypropylene is basically equal to dry strength, so it is an ideal material for making fishing nets and cables. 4. Hygroscopicity and dyeing properties are light, warm and good; almost no hygroscopicity, but a strong suction ability, moisture wicking effect is obvious; polypropylene moisture absorption is very small, almost no moisture, the general atmospheric conditions of the moisture regain is close to zero. However, it has a wicking effect and can transmit water vapor through the capillary in the fabric, but does not exert any absorption by itself. Polypropylene has poor dyeability and incomplete chromatogram, but it can be used to make up for deficiencies. 5. Acid and Alkali Resistance Polypropylene has good chemical resistance. In addition to concentrated nitric acid and strong caustic soda, polypropylene has good acid and alkali resistance, so it is suitable for use as a filter material and packaging material. 6. Lightfastness, etc. Polypropylene has poor light resistance, poor thermal stability, aging, and resistance to ironing. However, anti-aging properties can be improved by adding anti-aging agents during spinning. In addition, polypropylene has good electrical insulation, but static electricity is easily generated during processing. 7. High strength Polypropylene elastic yarn strength is second only to nylon, but the price is only 1/3 of the nylon; the fabric made of a stable size, good abrasion resistance and good chemical stability. However, it has poor thermal stability, is not resistant to sunlight, and is susceptible to aging and brittleness. For this reason, anti-aging agents are often added to polypropylene.
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The Chinese brand name for synthetic fiber isotactic polypropylene fiber obtained by using propylene, a by-product of petroleum refining, as a raw material. Also known as polypropylene fiber. The source of raw materials is abundant, the production process is simple, and the price of the product is relatively cheaper than other synthetic fibers. The physical and mechanical properties of the fiber are: high strength (4-6 g/denier staple fiber, 5-8 g/denier filament), almost the same wet strength and dry strength, small specific gravity (0.91), and abrasion resistance Corrosion and so on. The annual production of polypropylene fiber in the world has exceeded 1 million tons in 1980. Polypropylene varieties include filaments (including undeformed filaments and bulky deformed filaments), staple fibers, tantalum filaments, fissured fibers, hollow fibers, shaped fibers, various composite fibers, and non-woven fabrics.
The main purpose is to produce carpets (including carpet base and suede), decorative fabrics, furniture fabrics, various ropes, strips, fishing nets, oil-absorbing felts, building reinforcement materials, packaging materials and industrial fabrics, such as filter cloths, bag cloths. Wait. In addition, the use of clothing has become increasingly widespread, and can be mixed with a variety of fibers made of different types of blended fabrics, after knitting can be made into shirts, coats, sportswear, socks and so on. The quilt made of polypropylene hollow fiber is light, warm, and elastic.
Polypropylene does not contain chemical groups that can bind to dyes in macromolecular structures, so dyeing is difficult. The melt coloring method is usually adopted. The pigment preparation and the polypropylene polymer are uniformly mixed in the screw extruder, and the color fastness of the colored fiber is obtained after melt spinning. Another method is to copolymerize or graft copolymerize with acrylic acid, acrylonitrile, vinylpyridine, etc. to introduce a polar group that can bind to the dye on the polymer macromolecule, and then dye it directly by conventional methods. In the production of polypropylene, it is often necessary to add various additives to improve dyeing, lightfastness, and flame resistance. The scientific name of polypropylene fiber, near the flame that is melted down, flammable, slowly burning from the fire and black smoke, the flame is yellow on the top, the lower end of the blue, emits the flavor of oil, burned after the ash is a hard round light yellow-brown particles, handcuffs fragile .
It is a fiber made from propylene as raw material by polymerization and melt spinning. Polypropylene officially began its industrial production in 1957 and is a rising star in synthetic fibers. Because polypropylene has the advantages of simple production process, low cost, high strength, and relatively light density, polypropylene has developed rapidly. At present, polypropylene is the fourth largest variety of synthetic fibers and the lightest fiber among common chemical fibers.
Polypropylene production includes short fibers, filaments, and split fibers. Polypropylene membrane fibers are made by first forming polypropylene into a film and then stretching the film to split it into a fibril network. Civil use: It can be used for pure spinning or blending with wool, cotton or viscose fiber to make a variety of fabrics. Can be used to weave various kinds of knitwear such as hosiery, gloves, knitwear, knit trousers, dish cloth, mosquito net cloth, wadding, warm stuffing, wet diapers and so on.
Industrial uses: carpets, fishing nets, canvases, hoses, concrete reinforcements, industrial fabrics, non-woven fabrics, etc. Such as carpets, industrial filter cloth, ropes, fishing nets, building reinforcements, oil-absorbing blankets, and decorative fabrics. In addition, polypropylene film fibers can be used as packaging materials.
The main physical and chemical properties of polypropylene. Morphology The vertical surface of polypropylene is flat and smooth with a circular section. 2. Density The biggest advantage of polypropylene is its light texture. Its density of only 0.91g/cm3 is the lightest density among common chemical fibers, so polypropylene with the same weight can get higher coverage than other fibers. 3. Strong stretch Polypropylene has high strength, large elongation, high initial modulus, and excellent elasticity. Therefore, polypropylene wear resistance is good. In addition, the wet strength of polypropylene is basically equal to dry strength, so it is an ideal material for making fishing nets and cables. 4. Hygroscopicity and dyeing properties are light, warm and good; almost no hygroscopicity, but a strong suction ability, moisture wicking effect is obvious; polypropylene moisture absorption is very small, almost no moisture, the general atmospheric conditions of the moisture regain is close to zero. However, it has a wicking effect and can transmit water vapor through the capillary in the fabric, but does not exert any absorption by itself. Polypropylene has poor dyeability and incomplete chromatogram, but it can be used to make up for deficiencies. 5. Acid and Alkali Resistance Polypropylene has good chemical resistance. In addition to concentrated nitric acid and strong caustic soda, polypropylene has good acid and alkali resistance, so it is suitable for use as a filter material and packaging material. 6. Lightfastness, etc. Polypropylene has poor light resistance, poor thermal stability, aging, and resistance to ironing. However, anti-aging properties can be improved by adding anti-aging agents during spinning. In addition, polypropylene has good electrical insulation, but static electricity is easily generated during processing. 7. High strength Polypropylene elastic yarn strength is second only to nylon, but the price is only 1/3 of the nylon; the fabric made of a stable size, good abrasion resistance and good chemical stability. However, it has poor thermal stability, is not resistant to sunlight, and is susceptible to aging and brittleness. For this reason, anti-aging agents are often added to polypropylene.
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