Biodegradable resin composition and manufacture method of resin composition and molded product

Abstract

The invention relates to a biodegradable resin composition and a manufacture method of the resin composition and a molded product. The biodegradable resin composition maintains high biodegradability, is high in mechanical strength, brings price competitiveness when compared with a petroleum-made resin, aiming at further cost reduction, and enables commercialization achieved. The biodegradable resin composition contains 51-95% by mass of a plant material (A), 2-17% by mass of an adhesive (B), and 3-35% by mass of polylactic acid (C), and the total amount of (A), and (B) and (C) is 100% by mass. The plant material (A) takes a sheet, one side of which is 2-5 mm and the other side of which is no more than 5mm, as a main component, and the mass percentage of the adhesive (B) is less than that of the polylactic acid (C).

Description

technical field [0001] The present invention relates to a biodegradable composition, a method for producing the composition, and molded articles formed by using the biodegradable composition. Raw materials for molded products with high mechanical strength comparable to resins. Background technique [0002] In modern society, various molded bodies or molded articles containing synthetic resins are widely used in a wide range of fields. However, most of these molded products are made of synthetic resins using petroleum as a raw material. When these molded products are no longer needed and are disposed of, for example, if they are buried underground, these molded products will remain in the area almost semi-permanently. It remains underground in its state, and if it is incinerated, it will produce harmful substances such as dioxin or produce CO 2 etc., which will lead to many problems such as environmental damage or adverse effects on the human body. Therefore, in recent yea...

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Problems solved by technology

[0010] Therefore, the compacts (products) of Patent Documents 1 and 2 all require high-precision pulverizers and drying devices, and the corresponding equipment costs become expensive, resulting in high costs for the compacts (products).

In addition, due to the hidden dangers of fine powder handling when manufacturing such molded objects (products), corresponding countermeasures must also be taken.

[0011] In addition, Patent Document 2 uses polylactic acid, but it is difficult to directly bond the polylactic acid to plant-based materials, and the affinity and adaptability between them are often insufficient, and even in a solidified state, insufficient adhesion is caused. and it is difficult to obtain the required mechanical strength

On the other hand, this polylactic acid is extremely slow in crystallization, and is almost amorphous under normal molding conditions, but has problems such as softening to the extent that it is difficult to maintain its shape at a glass transition temperature of 60°C or higher.

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