TPEE modified thermoplastic elastomer automobile sealing strip

Abstract

The present invention relates to a TPEE modified thermoplastic elastomer automobile sealing strip. The sealing strip is prepared from the combination of a binder and an addition agent, wherein the binder is composed of the combination of PP and two thermoplastic elastomers, the PP is a resin, and the two thermoplastic elastomers are a polyene elastomer TPE-A and a polyester elastomer TPE-B. The preparation method comprises the steps that 1) automatic compounding, plastication, oil charge and pre-dispersion are carried out; 2) twin-screw plastication, liquation, compounding, extrusion and granulation are carried out; 3) product inspection of a sealing strip material is carried out; 4) extrusion processing of the sealing strip is carried out, and the processes of feeding, compounding, and underwater traction and extrusion are completed on a sealing strip extrusion processing production line; 5) finished strip inspection of the sealing strip is carried out, inspections of structural, physical and chemical properties of the sealing strip are carried out; 6) cutting and jointing are conducted on the sealing strip, according to the specification requirement of the sealing strip, cuttingis carried out, and a jointing mold is used for jointing; 7) packing and storage are carried out, the finished product of the sealing strip is tested again, and the qualified product is put into a warehouse. The TPEE modified thermoplastic elastomer automobile sealing strip has the advantages that the performances are excellent, the softness and hardness of the product are adjusted by PP content,the application range is wide, and the free lifting of the automobile sealing strip at an ultra-low temperature can be met.

Description

technical field [0001] The invention relates to a TPEE modified thermoplastic elastomer automobile sealing strip, which belongs to the technical field of modified thermoplastic elastomer sealing materials, in particular to a TPEE modified thermoplastic elastomer automobile sealing strip. Background technique [0002] Automobile sealant strips are widely used in car doors, windows, car bodies, sunroofs and other parts, and have important functions such as waterproof, sealing, sound insulation, dustproof, shock absorption and energy saving. In recent years, the country has attached great importance to the management of automobile lightweight, low VOC, energy saving, emission reduction, and noise reduction. Traditional sealing strips are mainly made of soft PVC and EPDM raw materials. Although the sealing strip made of EPDM synthetic rubber has good extrusion process performance, strong weather aging resistance, and excellent comprehensive performance, it needs to add a large a...

AI Technical Summary

Problems solved by technology

The production process of TPV is similar to that of EPDM. It needs to go through steps such as rubber mixing and vulcanization. The dynamic vulcanization reaction process is complicated, and the quality control of domestic products is difficult and the stability is poor.

At present, TPV is expensive to import from abroad as a high-grade raw material, and the domestic price of middle and low-grade materials is also relatively high, which not only limits its application range, but also contains residual vulcanizing agents and other additives like EPDM, which makes it difficult to meet the VOC standard due to abnormal odor.

In recent years, domestic manufacturers have reported that TPV is not well plasticized, which affects the molding process and product appearance. The main reason is that the degree of vulcanization is not properly controlled during the production process of TPV, or the dispersion of vulcanized rubber particles is poor, which affects the fluidity of the melt.

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