All-plastic tail door outer plate material low in linear expansion coefficient and easy to bond and preparation method of all-plastic tail door outer plate material

Abstract

The invention discloses an all-plastic tail door outer plate material with low linear expansion coefficient and easy adhesion. The all-plastic tail door outer plate material is prepared from the following components in parts by weight: 45 to 61 parts of polypropylene, 8 to 15 parts of styrene-isoprene-styrene block copolymer, 5 to 10 parts of polarity improver, 15 to 30 parts of enhancer, 3 to 6 parts of compatilizer, 0.4 to 0.6 part of antioxidant and 0.2 to 0.4 part of light stabilizer. The invention further discloses a preparation method of the all-plastic tail door outer plate material. By adding the reinforcing agent, the mechanical property of the material is improved, and the linear expansion coefficient of the material is reduced; the surface polarity of the material is improved by adding the styrene-isoprene-styrene block copolymer; through the synergistic effect of the nitrile rubber and the compatilizer, the surface polarity of the material is improved, and the bonding strength of the material is improved. The material prepared by the invention has the characteristics of low linear expansion coefficient and easiness in adhesion, and is particularly suitable for manufacturing an all-plastic tail door outer plate.

Description

technical field [0001] The invention belongs to the technical field of polymer material modification and processing technology, and particularly relates to an all-plastic tailgate outer panel material with low linear expansion coefficient and easy bonding and a preparation method thereof. Background technique [0002] In recent years, with the vigorous development of new energy vehicles, vehicle lightweighting has become a key focus area for enterprises. As an emerging lightweight technical solution, the all-plastic tailgate is favored by major OEMs for its excellent lightweight effect. Generally, the inner panel of the all-plastic tailgate is made of long glass fiber reinforced PP (LGF+PP) material or SMC material with low linear expansion coefficient. Acrylic material. [0003] The two parts of the inner panel and the outer panel of the all-plastic tailgate need to be pasted by glue. In order to achieve a better bonding effect and a higher dimensional accuracy of the par...

AI Technical Summary

Problems solved by technology

[0004] Polypropylene is a polymer material with a non-polar molecular structure, and there are no polar groups such as carbonyl, carboxyl, and hydroxyl in its molecular structure, so the bonding performance of the mineral-filled modified polypropylene outer plate material is poor. At the same time, its linear expansion coefficient is also quite different from the material of the inner plate, and problems such as large product size gaps and product degumming are prone to occur during gluing.

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