Matte TPO skin material with low processing viscosity as well as preparation method and application of TPO skin material

Abstract

The invention provides a matte TPO skin material with low processing viscosity as well as a preparation method and application of the TPO skin material. The TPO skin material is formed by filling a thermoplastic polyolefin (TPO) with nanoparticles, wherein the mass ratio of the TPO to the nanoparticles is (90-99.5):(0.5-10); and the nanoparticles include one or more selected from the group consisting of multi-layer graphene, carbon nanotubes, monodisperse polystyrene microspheres, manganese oxide nanowires, iron tetroxide nanoparticles, fumed silica, and nano carbon black particles. The nanoparticles are packed in the TPO, so that the free volume of the polymer is increased, and the density of entanglement points is reduced; at the same time, interface slip occurs between the nanoparticlesand the polymer, the interface slip acts as a lubricant to reduce the viscosity of the system, so that the process temperature of operation such as mixing, calendaring and extrusion in the material processing process is reduced; the nanoparticles play a matting effect; the added nanoparticles have little effect on the mechanical properties of the material and improves the friction-resistant coefficient; and the TPO skin material provides guidance for industrial production.

Description

technical field [0001] The invention belongs to the technical field of automobile materials, and in particular relates to a low-processing-viscosity matte TPO skin material, a preparation method and an application thereof. Background technique [0002] The car dashboard is an important part of the car interior. The instrument panel is a unique combination of safety, functionality, comfort and decoration. Instrument panel can be divided into hard plastic instrument panel and soft instrument panel. In mid-to-high-end automobiles, the polymer materials usually used in the skin of automobile soft dashboards include polyvinyl chloride (PVC), thermoplastic polyurethane (TPU), thermoplastic polyolefin TPO, etc. PVC skin is cheap, but there are problems such as excessive VOC. TPU has very good overall performance, but the price is relatively high, and it is usually used in high-end cars. TPO skin has the characteristics of low VOC, and the price is cheaper than TPU. Therefore, u...

AI Technical Summary

Problems solved by technology

Due to the fact that corona treatment during the production process will release ozone to cause harm to workers and cause environmental problems

At the same time, leakage and other reasons during the corona process will lead to poor corona effect, reduce the pass rate of TPO materials, and increase production costs

Chinese patent CN 107323046 A uses an adhesive instead of corona treatment. First, the TPO cast film is synthesized by an extruder, and then laminated with polypropylene foam under pressure, and then coated with adhesive, adhesive, surface treatment agent, etc., the operation process Although the corona process is avoided in the process, multi-layer materials are combined, and the process operation is complicated. At the same time, the temperature of the cast film is as high as 220°C and the pressure is as high as 6Mpa, which affects the clarity of the skin pattern.

Chinese patent CN 102514337 discloses an interior material for automobiles and its manufacturing method, in which TPO is calendered twice, and the temperature is too high, making it very difficult to peel the material from the roll, resulting in uneven thickness and uneven surface and other problems, unable to meet the needs of use

Good processability often leads to poor mechanical properties

As an automotive interior material, in order to avoid driving safety problems caused by glass reflections, matte design is used in principle. However, the TPO material itself has problems such as high surface gloss, poor wear resistance, and non-matte, which require corona treatment or coating. Covering adhesives, surface treatment agents and other operations, this performance has limited the actual production and application process

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