Thermoplastic polyurethane composite material used for cable and optical cable sheaths and preparation method of composite material

Abstract

The invention discloses a thermoplastic polyurethane composite material used for cable and optical cable sheaths. The composite material is mainly prepared from the following raw material components in parts by weight: 15-35 parts of TPU1, 30-60 parts of TPU2, 10-30 parts of continuous long fibers, 0.1-10 parts of a compatibilizer, 0.1-6 parts of a lubricant, 0.2-5 parts of an antioxidant, and 0-35 parts of a flame retardant. The obtained thermoplastic polyurethane composite material provided by the invention has excellent tensile strength, rigidity and wear resistance, has high performance such as toughness, hardness, elasticity, oil resistance, chemical corrosion resistance, weather resistance, tension resistance and extrusion resistance, can form a good product surface, has higher impact resistance and higher wear resistance, can meet the performance requirements of a high-performance cable and optical cable sheath material, and is used in special application fields such as wind energy cables and submarine optical cables. The preparation method of the thermoplastic polyurethane composite material provided by the invention is beneficial for obtaining an excellent-performance material used for the cable and optical cable sheaths, and is convenient for application and promotion of the material, and has remarkable economic benefits.

Description

technical field [0001] The invention relates to the technical field of thermoplastic polyurethane materials, in particular to a thermoplastic polyurethane composite material for cables and optical cable sheaths, and also relates to a preparation method of the thermoplastic polyurethane composite material. Background technique [0002] Thermoplastic polyurethane (TPU) is a kind of high polymer containing carbamate group obtained by the reaction of diisocyanate, macromolecular diol and small molecule chain extender. Due to the diversity of raw material types and the multiple selectivity of the proportion, TPU has become a kind of polymer material with the widest performance range. The unique properties of TPU include: (1) a fairly wide hardness range, from Shore A60 to Shore D80, and high elasticity throughout the hardness range, and tear resistance; (2) without adding plasticizers, It is flexible in a wide temperature range (-60°C-120°C); (3) it has good resistance to many n...

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Problems solved by technology

[0003] However, TPU has the disadvantages of insufficient strength and rigidity, and it is difficult to be used as a structural material; in addition, although TPU is one of the materials with the best wear resistance in engineering materials, it is used in special applications such as wind energy cables, submarine optical cables and other sheaths. still restricted

In order to improve the performance of TPU, non-polar particles and fibers are usually used to enhance the strength. However, although the above-mentioned materials improve the strength and reduce the material cost, the toughness of the material will be reduced; the use of long fiber reinforcement technology can greatly improve the mechanical properties of the material. performance, but there will be "floating fiber" phenomenon, and due to the high viscosity and poor fluidity of ordinary TPU, the preparation of long fiber reinforced TPU is limited

At present, the mainstream preparation method of long fiber reinforced thermoplastic resin (LFT) is the impregnation method, which generally has the defects of difficult die design, uneven fiber distribution, and poor impregnation effect.

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