Modification And New Varieties Of Polypropylene Fiber

Polypropylene fiber has many excellent properties, but it also has shortcomings such as strong waxy feel, hard hand feel, difficulty in dyeing, and easy accumulation of static electricity. Therefore, modifying it and developing new varieties has become the main direction for the development of polypropylene fiber.
(1) Dyeable polypropylene fiber
There are no fuel-loving groups in the polypropylene fiber molecules, and the molecules have a tight aggregation structure. Conventional polypropylene fibers are generally difficult to dye. Currently, most of the polypropylene fibers on the market obtain their color through pre-spun coloring, but the color spectrum is incomplete and cannot be printed, which limits the diversification of fabric varieties. Therefore, how to apply common dyeing techniques to polypropylene fibers has become a matter of concern. At present, a variety of dyeable polypropylene fiber technologies have been developed. These technologies can be roughly divided into two categories: one is to graft polymers or monomers containing fuel-loving groups onto polypropylene molecular chains through graft copolymerization; Make it dyeable; the second is to destroy and reduce the tight aggregation structure between polypropylene macromolecules through blending spinning, so that polymers containing fuel-loving groups are mixed into the polypropylene fiber, so that some high-interface interfaces are formed in the fiber. The submicroscopic discontinuities of energy allow the fuel to smoothly penetrate into the fiber and combine with the fuel-loving groups.
(2) Industrial polypropylene filament and high-strength polypropylene fiber
Industrial polypropylene filament and high-strength polypropylene refer to all polypropylene filaments used other than clothing. Its production process and use are significantly different from fibers for clothing. By selecting high-molecular and high-regular polypropylene raw materials, starting from improving the degree of macromolecular chain extension and crystallinity, and rationally controlling the spinning, drawing, and heat treatment processes, industrial polypropylene filaments or high-strength polypropylene fibers can be obtained. Its linear density, modulus, and strength requirements are high, and the requirements for elongation at break and stretch rate are generally low.
(3) Fine and ultra-fine polypropylene fiber
Ordinary polypropylene fiber feels hard and has a waxy feel, so it is mainly used in carpets, non-woven fabrics, decorative fabrics and industrial fabrics, and is used in small quantities for clothing. With the development of new catalysts and controllable rheology resin manufacturing technology, fine and ultra-fine polypropylene fibers have developed rapidly, laying the foundation for their application in the clothing field.
Using fine polypropylene filament as a clothing material has the characteristics of low density, low static electricity, warmth, good hand feeling, special luster, and resemblance to real silk. It also has wicking effect, hydrophobicity and moisture conductivity. It is ideal for making underwear and sportswear. Ideal material.
(4) Flame retardant polypropylene fiber
Fabrics made of polypropylene fibers are prone to burning and dripping, which limits their use. The flame retardant modification of polypropylene fiber is mainly prepared by adding modification and flame retardant finishing.
Polypropylene mainly obtains flame retardant effects by using synergists such as halogen flame retardants and antimony trioxide. Usually, high concentrations of flame retardants and other additives are first added to polypropylene slices, and then blended to produce flame retardant products. The masterbatch is burned and then melt-spun with conventional polypropylene sliced fibers to prepare flame-retardant polypropylene fibers. The phosphorus-bromine synergistic flame retardant system has good flame retardant effect when used for polypropylene fiber and has little environmental pollution, while the phosphorus-nitrogen synergistic flame retardant system has better flame retardant effect when used for polypropylene fiber, but The application conditions in polypropylene fibers are relatively high.
(5) Far-infrared polypropylene fiber
Far-infrared polypropylene fiber is a new type of textile material with excellent health care and physical therapy functions, thermal effect functions, moisture removal, breathability, and antibacterial functions. It contains a special ceramic component that can absorb radiant heat released by the human body, and after absorbing natural light and heat, emits back far-infrared rays of 4~14μm wavelength that the human body needs most. This far-infrared ray has the characteristics of radiation, penetration and resonance absorption. It is easily absorbed by human skin, activates tissue cells, promotes metabolism, and allows the human body to achieve the health care functions of moisturizing and promoting blood circulation.