Hot-melt glue film for combining polypropylene cellular boards and preparing method of hot-melt glue film

Abstract

The invention discloses a hot-melt glue film for combining polypropylene cellular boards and a preparing method of the hot-melt glue film. The preparing method comprises the steps that ternary co-polypropylene with a low melting point, an ethylene-propylene copolymer or an ethylene-butylene copolymer, C5 / C9 copolymerization resin, high-molecular-weight PP wax and an antioxidant are put into a kneading machine according to a certain proportion for smelting treatment, after the system is smelted, a closure silane adhesion promoter is added multiple times, kneading treatment is carried out, then water ring granulation is carried out, the materials are extruded and then subjected to curtain coating treatment, and the hot-melt glue film is prepared. In the matrix, ternary co-polypropylene is adopted for blending modification, and thus the requirement of consumers for carrying out combination under the situation without softening deformation of PP cellular boards can be met; the low-temperature flexibility of hot-melt glue can be improved with the ethylene-propylene copolymer or the ethylene-butylene copolymer; the adhesion strength can be improved through the closure silane adhesion promoter; the hot-melt glue film prepared from the formula system is good in film forming performance and fast in crystallization, and thus can be easily prepared with the curtain coating process technology, lining paper is not needed, cost is reduced, and popularization is facilitated.

Description

technical field [0001] The invention relates to a hot-melt adhesive film for compounding polypropylene honeycomb panels, in particular to a hot-melt adhesive film for compounding polypropylene honeycomb plates and a preparation method thereof. Background technique [0002] Functional and lightweight materials are the subject of new materials today, and polypropylene (PP) plastics with a lower specific gravity combined with a honeycomb structure will bring more excellent application performance and have a wide range of application prospects. [0003] PP honeycomb panel is a panel made of two thinner panels firmly bonded on both sides of a thicker honeycomb core material, also known as honeycomb sandwich structure. This structure is widely used in the trunk cover, trunk partition, trunk carpet substrate, Surrounding decorative panels, ceilings and other interior parts, engine turnover boxes, etc. For example, at present, turnover boxes for auto parts are mainly produced in G...

AI Technical Summary

Problems solved by technology

Using traditional glue, although it can be compounded, on the one hand, it does not conform to the concept of environmental protection; on the other hand, the glue is mostly a curing system, which is more brittle at low temperature, and the performance cannot be guaranteed.

However, there is still no glue suitable for the five-layer composite process for hot melt adhesive products.

[0005] 1) Modified EVA type hot melt adhesive film, although the bonding strength and composite process are suitable for customers, but due to the fatal low softening point of EVA, it cannot be popularized

[0006] 2) Although the encapsulation type TPE can be used to coat the PP material, the process mainly adopts the method of injection encapsulation, the encapsulation temperature is high, and it is coated in the softened state of PP, which is not suitable for the continuous lamination machine craft

In addition, TPE-type materials have poor film-forming properties. Even with oil-extended TPE, the casting film speed is still very slow and cannot be marketed.