Fully-biodegradable foaming material and application thereof

Abstract

The invention discloses a fully-biodegradable foaming material, which is characterized by being prepared from 100 weight parts of fully-biodegradable resin, 1 to 40 weight parts of plasticizer and 0.5 to 10 weight parts of foaming agent. The foaming material has high ductility, elasticity and wearing resistance.

Description

technical field [0001] The invention relates to a fully biodegradable foaming material and its application. Background technique [0002] In the application field of plastics, compared with unfoamed plastics, the density of foamed polymer materials can be reduced by 5%-98%, and the performance of impact strength, toughness, rigidity and fatigue life can be greatly improved, so The application field is very wide. The foamed products used in the market are mainly PE foamed materials, PP foamed materials, PU foamed materials, PS foamed materials, EVA foamed materials, PVC foamed materials, and PP / starch foamed materials. Materials, etc., these foam materials can not be completely degraded, serious environmental pollution. [0003] With the continuous research and development of biodegradable plastics since the 1960s and 1970s, a variety of biodegradable materials have come out. After biodegradation, these biodegradable materials become water and carbon dioxide. Will not cause...

AI Technical Summary

Problems solved by technology

For example, the publication number CN1923890A discloses the use of poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (P3HB4HB), PLA and foaming agent blending to manufacture foaming materials. Similarly, the publication number is CN101245175A The patent also discloses foaming materials made of PLA resin, polyhydroxyalkanoate copolymer, corn starch, etc. , but the above-mentioned foaming material is not high in strength, elasticity and fracture performance of the foamed product due to the brittleness of PLA on the one hand. Lower temperatures (such as less than -20°C) will become brittle. If exposed to higher or lower temperatures during use, the foaming material will become soft or brittle and cause damage. At the same time, the degradation of the PLA resin must be It is carried out under composting conditions, and the degradation conditions are relatively harsh. The degradation of PLA resin materials discarded by people is relatively slow or even difficult to degrade, so it still cannot solve the serious white pollution problem that currently exists.

In particular, a relatively large amount of starch is added to the above-mentioned foaming material, which causes the material to be easily hydrolyzed under wet conditions, and the quality is very unstable

Therefore, the above-mentioned foaming materials can only be used in applications such as packaging materials that do not require high toughness and elasticity, low temperature requirements, and low requirements for hydrolysis, but cannot be used in the manufacture of shoes such as insoles, sofas, and mattresses. , carpets and other product fields that require very high material performance

[0005] The patent with the publication number CN101146853A discloses a polyhydroxyalkanoate resin foamed particle, which is obtained by directly foaming the polyhydroxyalkanoate resin, because the PHAs are not modified and directly foamed, on the one hand, directly It is difficult to obtain a satisfactory foaming material by using PHAs foaming, the foaming process is more complicated, and the foaming ratio is not high. On the other hand, the cost of using this foaming material as a raw material is too high. Ester resin is used for foaming, the toughness and elasticity are not ideal, this kind of foaming material can only be applied to general packaging materials

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