A lightweight, low-odor, low-voc, high-impact-strength, high-temperature-resistant PP honeycomb composite panel and its preparation method

Abstract

The invention discloses a lightweight, low-odor, low-VOC (volatile organic compounds) and high-temperature-resistant PP (polypropylene) honeycomb composite plate with high impact strength and a methodfor preparing the lightweight, low-odor, low-VOC and high-temperature-resistant PP honeycomb composite plate. The lightweight, low-odor, low-VOC and high-temperature-resistant PP honeycomb compositeplate sequentially comprises a prepreg skin layer, a PP honeycomb core layer and another prepreg skin layer from top to bottom. Heating and cooling composition is proportionally and structurally carried out on glass fibers, micro-spheres and adhesive powder to obtain the prepreg skin layers, and a proportion of the glass fibers to the micro-spheres to the adhesive powder ranges from 39.8:0.6:59.6to 58.8:2.0:39.2. The lightweight, low-odor, low-VOC and high-temperature-resistant PP honeycomb composite plate and the method have the advantages that the micro-spheres are introduced into ultra-light CMT for the lightweight, low-odor, low-VOC and high-temperature-resistant PP honeycomb composite plate and can be expanded, the gram weights of the CMT can be integrally reduced, accordingly, the lightweight, low-odor, low-VOC and high-temperature-resistant PP honeycomb composite plate is lightweight under the condition that the forming thicknesses are not changed, and the minimum gram weight of the lightweight, low-odor, low-VOC and high-temperature-resistant PP honeycomb composite plate can reach 500 g / m<2> while the gram weights of conventional honeycomb plates are 900 g / m<2> or above.

Description

technical field [0001] The invention belongs to an expandable PP honeycomb composite board and a manufacturing method thereof, in particular to a lightweight, low-odor, low-VOC, high-impact strength, high-temperature-resistant PP honeycomb composite board and a preparation method thereof. Background technique [0002] PP honeycomb panel is a panel made of two thinner reinforced panels through thermoplastic resin and a hollow honeycomb PP core layer. Its unique hollow structure endows the product with special properties - light weight and high strength. At the same time, it overcomes the shortcomings of traditional paper honeycombs that are susceptible to moisture, and takes into account the characteristics of easy molding, sound insulation, and heat insulation, making it widely used in trunk covers, trunk partitions, and trunk carpet substrates for mid-to-high-end passenger cars. , Side decorative panels, ceiling interior and other parts. [0003] At present, PP honeycomb p...

AI Technical Summary

Problems solved by technology

[0004] 1. Ordinary PP honeycomb panels have problems such as odor and VOC exceeding the standard, which are increasingly unable to meet the stringent requirements for this indicator in the field of automotive interiors, seriously affecting the sustainable application of PP honeycomb materials

[0005] 2. The general PP honeycomb core material has a low melting point. During the hot-pressing process of the product, the PP honeycomb is easy to soften and collapse, resulting in risks such as the shape of the molded part is not full, and the corners are deformed.

[0006] 3. The contact area between the PP honeycomb core and the prepreg skin layer is small, and there is a gap, which greatly reduces the mechanical strength and skin peel strength of the molded part, and seriously affects the stiffness of the PP honeycomb panel.

[0007] 4. Further improvement of lightweight PP honeycomb materials can often only be achieved by reducing the glass fiber content in the prepreg, but this will also lead to a decrease in the overall strength of the structural parts and affect the use

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