Manufacturing method of thermoplastic polyester elastomer conveyer belt with low shrinkage and deformation

Abstract

The invention relates to a manufacturing method of a thermoplastic polyester elastomer conveyer belt with low shrinkage and deformation. A thermoplastic polyester elastomer (TPEE) is coated on a fabric. The manufacturing method comprises the following steps of: blending the thermoplastic polyester elastomer and a polyolefin nucleating agent according to the ratio of 500: (0.5-1.5) in parts by weight by using a blender to obtain a blend; extruding and granulating the blend by a twin screw extruder to obtain grains; freezing the grains at a low temperature, crushing the grains into powder; thermally shaping the fabric; coating the powder on the fabric, putting the fabric in an oven at 160-180 DEG C to be processed for 2-5min, cooling and shaping to obtain the product. The invention has the advantages that the TPEE is uniformly crystallized by blending the nucleating agent and the TPEE, the smoothness of the conveyer belt can be ensured when the thickness is small, the original performances of the TPEE are not influenced by the use of the nucleating agent, and unfavorable influence on other performances of the conveyer belt can not be caused while the smoothness of the conveyer belt is ensured.

Description

technical field [0001] The invention relates to the conveyor belt manufacturing industry, in particular to a method for manufacturing a thermoplastic polyester elastomer conveyor belt with low shrinkage deformation. Background technique [0002] Thermoplastic polyester elastomer (TPEE) is a block copolymer containing polyester hard segments and polyether soft segments. Among them, the polyether soft segment and the uncrystallized polyester form an amorphous phase, and the polyester hard segment partially crystallizes to form a crystalline microdomain, which acts as a physical crosslinking point. TPEE has the elasticity of rubber and the strength of engineering plastics; the soft segment gives it elasticity and makes it like rubber; the hard segment gives it processing properties, making it like plastic; compared with rubber, it has better processing properties and longer use Lifespan; Compared with ordinary plastics, it also has the characteristics of high strength, but bet...

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Problems solved by technology

[0003] However, during the processing of TPEE, due to the uneven grain size and distribution, it has a large shrinkage deformation during the cooling and crystallization process.

In the manufacturing process of the conveyor belt, due to its large shrinkage deformation, the surface of the conveyor belt will be uneven, and the two sides will be upturned, such as figure 1 As shown in the picture of the TPEE conveyor belt produced in the traditional way, it has a great impact on the appearance and performance of the conveyor belt

This problem is usually solved by thickening the surface layer material and multi-layer compounding with other materials, but this will increase the cost

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