What is the difference between nylon yarn and PP yarn? Let's explore it together!

First, the chemical molecular structure is different: nylon filament is a general term for thermoplastic resin containing a repeating amide group - [NHCO] in the main chain of the molecule. The PP color yarn is a polypropylene fiber.

Second, there are differences in feature performance:

The longitudinal direction of polypropylene is straight and smooth, and the cross section is circular. The biggest advantage of density polypropylene is light texture. Its density is only 0.91g/cm3, which is the lightest density among common chemical fibers, so the same weight of polypropylene can be obtained compared with other fibers. The higher coverage area. High-strength polypropylene has high strength, large elongation, high initial modulus and excellent elasticity. Therefore, polypropylene has good wear resistance; 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; hygroscopicity and dyeing properties are light and warm; almost no moisture absorption, but wicking ability is strong, The moisture wicking effect is obvious; the polypropylene has little hygroscopicity and almost no moisture absorption, and the general moisture regain rate under atmospheric conditions is close to zero. However, it has a wicking action that transfers water vapor through the capillary in the fabric, but does not itself absorb any absorption. The dyeability of polypropylene is poor, the chromatogram is not complete, but the method of coloring the original liquid can be used to make up for the deficiency; the acid-resistant and alkali-resistant polypropylene has good chemical resistance, except for concentrated nitric acid, concentrated caustic soda, polypropylene to acid and alkali. Good resistance, so it is suitable for use as filter materials and packaging materials; polypropylene with light resistance and other light resistance is poor, thermal stability is also poor, easy to age, not resistant to ironing. However, it is possible to improve the anti-aging property by adding an anti-aging agent at the time of spinning. In addition, polypropylene has good electrical insulation, but it is easy to generate static electricity during processing. Because the thermal conductivity of polypropylene is small, the thermal insulation is good; the strength is high. The strength of polypropylene elastic yarn is second only to nylon, but the price is only 1/3 of nylon; the fabric is stable in size, good in abrasion resistance and good in chemical stability.

Nylon is a ductile horny translucent or milky white crystalline resin, and the molecular weight of nylon as an engineering plastic is generally 1.5 to 30,000. Nylon has high mechanical strength, high softening point, heat resistance, low friction coefficient, abrasion resistance, self-lubricating property, shock absorption and sound absorbing property, oil resistance, weak acid resistance, alkali resistance and general solvent, and good electrical insulation. Self-extinguishing, non-toxic, odorless, good weatherability, poor dyeability.

Third, there are significant differences in development history and use:

Nylon yarns are commonly used in making combs, toothbrushes, clothes hooks, fan bones, net bag ropes, fruit packaging bags, and the like. Non-toxic, but not in contact with acid and alkali for a long time.

PP yarn for civilian use: can be purely spun or blended with wool, cotton or viscose to produce a variety of clothing. Can be used to weave a variety of knitwear such as hosiery, gloves, sweaters, knit pants, dish cloth, mosquito net cloth, wadding, warm filler, wet diapers, etc.

Through the above introduction, you understand the difference between nylon yarn and PP yarn, is the difference between the two?