Low-cost polyurethane foam composite material used for automotive interior and preparation method thereof

Abstract

The invention discloses a low-cost polyurethane foam composite material used for an automotive interior and a preparation method thereof. The preparation method comprises the following steps of: mixing polyether polyol, a foaming catalyst, a foam stabilizer, and water to obtain first mixed liquid; attaching copper powder to the short glass fiber, mixing with the isocyanate to obtain second mixed liquid, mixing the prepared first mixed liquid and the second mixed liquid, and performing molding and aging to obtain the polyurethane foam composite material. The copper powder is attached to the short glass fiber, the copper has excellent thermal conductivity, a glass fiber carrier provides a heat conduction path for the heat conduction of the copper, and has heat conduction effect for generating large amount of heat by the polyurethane rigid foam and the water while foaming, so that the heat can be rapidly released, and the problem of foam heart burnt can be solved.

Description

technical field [0001] The invention relates to the technical field of polyurethane foam, and in particular to a low-cost polyurethane foam composite material for automotive interior decoration and a preparation method. Background technique [0002] With the maturity of my country's automobile technology, the performance of core components such as engines and gearboxes is becoming more and more perfect, and the competitiveness of automobiles is gradually shifting to the interior. The information that consumers can contact and feel in the shortest time comes from the interior of the car. Therefore, improving the quality of automotive interiors has become one of the focuses of OEMs. As an important part of the car, the interior of the car plays an indispensable role in improving the competitiveness of the car. Its function is also changing. It not only improves the decoration of the car, but also requires the interior to have good heat insulation and thermal insulation. Effec...

AI Technical Summary

Problems solved by technology

This composite material production method is advanced to a certain extent, but there are still some problems in actual production: 1. During the process of manufacturing the inner core using polyurethane reaction injection molding technology, the polyurethane two-component material undergoes polymerization reaction in the mold cavity after mold closing , because the polyurethane polymerization reaction is an exothermic reaction, it will generate a certain amount of heat and pressure. The increase in temperature and pressure will easily cause adverse effects on the thermoplastic skin material, which will cause the skin to become thinner and the pattern to become lighter or disappear. In severe cases, it may cause The whole product is scrapped; 2. When the glass fiber bundles and polyurethane reactive materials are mixed and poured on the surface of the plastic-forming skin, if the mixture of the former two is slightly uneven, it is easy to retain air bubbles. The product is bulging, leading to the scrapping of the product, and when this problem occurs on the vehicle that has been applied, it will cause adverse effects on the manufacturer. Therefore, the production of qualified products has extremely strict requirements on the fluidity of polyurethane materials and the wettability of glass fibers. Requirements; 3. Although the automotive interior parts produced have the characteristics of light weight and high performance, because the inner core material used is a composite of polyurethane rigid foam and glass fiber, the product has high hardness, lack of elasticity, and poor surface feel , generally not accepted by high-end cars

The invention uses melamine as a flame retardant, and the foamed polyurethane material of the sound-insulating pad prepared has good flame-retardant performance, but it will volatilize a large amount of aldehydes and other substances, which will affect the air quality in the car

[0007] At present, due to environmental protection and low-odor requirements for automotive interiors, polyurethane foams used in automotive interiors have transitioned from traditional chemical foaming agents to water foaming. Water foaming has the advantage of being green and pollution-free. Foaming is used to ensure the overall density of the foam, but a large amount of water reacts with isocyanate to generate a large amount of heat, which is likely to cause problems such as foam heartburn and cracking. There have been related reports to add heat-conducting metal fibers or graphene to modify its heat conduction to relieve foam. Heartburn problem, but the cost of graphene is high, and a large amount of heat-conducting metal needs to be added, which also has the disadvantage of high cost. Therefore, reducing the cost of heat-conducting fillers when polyurethane foam is foamed can promote the reduction of automobile costs