Nylon fiber with low surface friction coefficient and improved hydrophobicity and preparation method thereof

Abstract

The invention relates to a nylon fiber with low surface frictional coefficient and improved hydrophobicity and a preparation method thereof. The preparation method comprises mixing modified nylon masterbatch and nylon chips in a mass ratio of (0.5-5):(95-99.5), and performing melt spinning to obtain the nylon fiber with low surface frictional coefficient, wherein the modified nylon masterbatch ismainly composed of, by weight, 37-88.8% of nylon, 10-60% of PDMS (polydimethylsiloxane) and 0.2-3% of POSS with amino side chains and is made by adding the materials proportionally into a mixer, mixing well, transferring to a twin-screw extruder and dicing. The prepared nylon fiber with low surface frictional coefficient and improved hydrophobicity has both dynamic frictional coefficient and stationary frictional coefficient of less than 0.3, has an angle of contact with water being greater than 71 DEG, has good durability, spinnability and good mechanical properties, and has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of fiber manufacturing, and relates to a nylon fiber with low surface friction coefficient and improved hydrophobicity and a preparation method thereof. Background technique [0002] Nylon fiber is a kind of synthetic fiber connected by amide bonds. It has a series of excellent properties, such as high strength, good resilience, excellent wear resistance and chemical corrosion resistance, and strong impact resistance. It is used in clothing, decoration and Industry and other fields have been widely used. With the continuous differentiation of application fields, people often put forward different requirements for specific applications. In order to meet the requirements of water repellency and antifouling of clothing fibers, especially outdoor sports series clothing, and to improve the unique appearance and feel of microfiber fabrics, it is necessary to Nylon fiber is modified to reduce the friction coeffici...

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Problems solved by technology

[0003] At present, the research on the friction and hydrophobicity of nylon is mainly concentrated in nylon plastics, and lubricants (such as molybdenum disulfide, graphite, talc, mica flakes, ultra-high molecular weight polyethylene (UHMWPE), etc.) are often added by physical blending method. Improve the friction of nylon or add hydrophobic materials (such as polytetrafluoroethylene, polydimethylsiloxane, etc.) to improve the hydrophobicity of nylon, but after adding additives, due to the poor compatibility of additives and nylon, it cannot Uniformly dispersed in the substrate, resulting in unknown spinnability of the material and poor friction and hydrophobicity modification of the fiber, making it difficult to prepare a coefficient of friction from nylon plastics with a low coefficient of friction and good hydrophobicity in the prior art Nylon fiber with low and good hydrophobicity

[0004] The rare nylon fibers with low surface friction coefficient or improved hydrophobicity in the prior art are all prepared by post-finishing methods. Patent CN103451946 A discloses a preparation method of multifunctional nylon fibers, which mainly involves dipping nylon fibers into Silicone hydrophobic solvent composite finishing solution is treated for a period of time and solidified to obtain multifunctional fibers with a uniform hydrophobic coating on the surface. Although it can achieve water repellency and antifouling effects to a certain extent, it has poor durability and only has a single hydrophobicity. , the friction is unknown, the way of post-finishing, the bonding force between the nylon fiber and the finishing agent is weak, it is easy to fall off during use

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