Integrally recyclable full-PET material foam sandwich panel and production process thereof

Abstract

The invention discloses an integrally recyclable full-PET material foam sandwich panel and a production process thereof. The integrally recyclable full-PET material foam sandwich panel comprises two PET fiber surface layers and a PET foam core, the two PET fiber surface layers are compounded on the upper side and the lower side of the PET foam core, and each PET fiber surface layer comprises low-melting-point PET fibers and common PET fibers; the PET fiber surface layer is formed by combining low-melting-point PET fibers and common PET fibers in a sheath-core structure or in a mixed mode. Theinvention has the following beneficial effects: the material does not contain other reinforced fiber materials, realizes material singleness, can be integrally crushed and recovered without separatingthe surface layer from the core layer during scrapping, reduces environmental pollution and recovery processes, and reduces recovery cost; moreover, the low-melting-point PET fiber is melted at a lowtemperature while the common PET fiber still holds a physical structure, so that since the cooled low-melting-point PET fiber is used as an adhesive film and has good adhesive strength, use of otheradhesive materials is avoided, light weight is facilitated, the cost is saved, and the efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of novel composite materials, in particular to an integrally recyclable all-PET material foam sandwich panel and a production process thereof. Background technique [0002] With the development of the application of composite materials, the foam sandwich structure has become the most potential direction of structural weight reduction at present and in the future. The lightweight technology brought by it is very important to meet the needs of energy saving and environmental protection in many industrial fields, especially for The development of transportation fields such as rail transportation, aerospace, marine ships, and automobiles is particularly critical. For example, according to research data, if the weight of the vehicle is reduced by 10%, the fuel efficiency can be increased by 6%-8%, and the fuel consumption per 100 kilometers can be reduced by 0.3-0.6 liters for every 100 kg of vehicle maintenance....

AI Technical Summary

Problems solved by technology

[0004] 1) PU foam has good heat insulation, cushioning, sound absorption, rebound and other characteristics, and is widely used in the field of industrial construction, but its raw materials are toxic, and they are easy to volatilize toxic substances during use, and the material is not recyclable. easy to pollute the environment;

[0005] 2) PVC foam has good heat insulation and cushioning properties, excellent mechanical properties, no water absorption, and is not easy to burn. It is widely used in wind power blades, marine ships and other fields, but its weather resistance is poor and it has certain toxicity. It is a cross-linked solidified structure. Not recyclable, easy to pollute the environment;

[0006] 3) PMI foam is a new type of polymer structure foam material with the best comprehensive performance at present. It has the characteristics of light weight, high strength, high and low temperature resistance, etc., but because of its high price, it is mainly used in the aerospace field, and it is currently difficult to achieve widespread civilian use.

At present, various polymer composite materials are widely used, but they are also facing the difficulty of recycling. They can only be disposed of by simple landfill or incineration, which pollutes the environment and wastes a lot of resources. Therefore, PET foam is playing its lightweight role. At the same time of application, it will also play an important role in environmental protection, energy conservation, sustainable development, etc.

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