High and low temperature resistant nylon composite material and preparation method thereof

Abstract

The invention discloses a high / low temperature-resistant nylon composite material and a preparation method thereof. The high / low temperature-resistant nylon composite material comprises the following components: 55-85 parts of aliphatic nylon 12, 5-25 parts of nylon 610, 5-10 parts of nylon 612, 1-15 parts of a cycloolefin copolymer, 0.5-5 parts of a compatilizer, 0.1-1 part of a hindered phenol antioxidant, 0.1-0.5 part of a copper salt compound antioxidant, 2-3 parts of N-butylbenzene sulfonamide and 0.2-1 part of N,N-dimethyl-p-toluenesulfonamide, wherein the relative viscosities of the aliphatic nylon 12, the nylon 610 and the nylon 612 are below 2.7; the cycloolefin copolymer is selected from ethylene with density of 1.01+ / -0.01 g / cm<3> and a norbornene copolymer TOPAS resin; the compatilizer is selected from maleic anhydride grafted amorphous polyolefin. The high / low temperature-resistant nylon composite material is difficult to crystallize, high in transparency and low in coefficient of thermal expansion, and has the advantages of greatly improving the problem of high optical attenuation loss and further improving the mechanical strength of the material.

Description

technical field [0001] The invention relates to an optical fiber tight casing material, in particular to a high and low temperature resistant nylon composite material and a preparation method thereof. Background technique [0002] Nylon is a semi-crystalline aliphatic polyamide with excellent strength (tensile strength above 40MPa), wear resistance, toughness, oil resistance and other comprehensive properties. At present, it has been widely used in the fields of automobiles, electronic appliances, machinery, chemicals, sports equipment, etc., but it cannot fully meet the requirements in the field of optical fiber tight sleeves. Optical fibers are now an important tool for information transmission and are used for long-distance information transmission. . The tiny fiber is sheathed in a plastic sheath that allows it to be bent without breaking. Although nylon has the above excellent properties, ordinary grades of nylon 12 and nylon 610 cannot be directly used as optical fib...

AI Technical Summary

Problems solved by technology

Although nylon has the above excellent properties, ordinary grades of nylon 12 and nylon 610 cannot be directly used as optical fiber tight sleeve materials, mainly because the crystallinity of nylon often makes the material opaque and has a high thermal expansion coefficient, resulting in optical fiber coated nylon tight sleeves The increase of post-attenuation cannot meet the requirements, and the commonly used low-smoke halogen-free polyethylene or PVC optical fiber tight sleeve can meet the requirements of optical fiber attenuation resistance, but its low strength, low temperature resistance, and opacity cannot meet the high temperature and high requirements of optical fiber use places.

At present, the materials in the domestic market all come from Degussa, Germany, and the product model is single, and there is no patent report, and there is no domestic material that meets the needs of this product.

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