PLA材料在可降解（jiě）材（cái）料使用中發揮什麽作用？

可降解（jiě）材料包括生物降（jiàng）解材料和光降解材料等，由微生物合成的生物降解塑料，簡稱生物塑料，包括生物聚酯、生物纖維素（sù）、多糖類和聚氨基（jī）酸等，是一類能完全被自然界（jiè）中的（de）微生（shēng）物降解的塑（sù）料。

Biodegradable materials include biodegradable materials and photodegradable materials. Biodegradable plastics synthesized by microorganisms, referred to as bioplastics for short, include biopolyesters, biocellulose, polysaccharides and polyamines. They are a kind of plastics that can be completely degraded by microorganisms in nature.

可降解材料是指在自然環境下（xià），可通過陽光降解，生物降解，自然降解的材料（liào）。可降解材料對（duì）環境不會造（zào）成危害，降解產生的物質也會（huì）被環境吸收。

Degradable materials refer to materials that can be degraded by sunlight, biodegradation and natural degradation in the natural environment. Degradable materials will not cause harm to the environment, and the substances produced by degradation will also be absorbed by the environment.

當前市場上常用的可降解材料（liào）是（shì）PLA、BPAT和PHA，產業鏈詳述以（yǐ）這三種材料為（wéi）例。

At present, the commonly used degradable materials in the market are PLA, bpat and PHA. The industrial chain details these three materials as examples.

可降解材料產業鏈上遊：為原材料。其中PLA原材料是澱粉（fěn）、葡（pú）萄糖（táng）和（hé）丙交酯，PBAT原（yuán）材料是AA、PTA和BDO，PHA的原材料為澱粉、葡萄糖和脂肪酸。

Upstream of degradable materials industry chain: raw materials. Among them, PLA raw materials are starch, glucose and lactide, PBAT raw materials are AA, PTA and BDO, and PHA raw materials are starch, glucose and fatty acids.

可降解材料產業鏈中遊（yóu）為：可降解材料製（zhì）成品。如餐具、化纖、膜袋（dài）、農用地膜、醫療器械和（hé）移植物。

The middle reaches of the degradable materials industry chain are: finished products of degradable materials. Such as tableware, chemical fiber, membrane bags, agricultural mulch, medical devices and grafts.

PLA材料是有植（zhí）物澱粉中提取的材料，具有可塑性的可降解材料，PLA聚（jù）乳酸（suān）特點：

PLA material is a plastic degradable material extracted from plant starch. PLA polylactic acid has the following characteristics:

1、自然環境下可通過（guò）生物降解，不會（huì）對環境造成危害。

1. In the natural environment, it can be biodegradable and will not cause harm to the environment.

2、材料穩定性好，可采用（yòng）多種工（gōng）藝加工（gōng）。

2. The material has good stability and can be processed by a variety of processes.

3、生物相容性、光（guāng）澤度、透明性（xìng）、手感和耐熱性好。

3. Good biocompatibility, gloss, transparency, hand feel and heat resistance.

可降（jiàng）解顆粒生產廠家認為，PLA是一種新型的生物降解材料，使用可再生的植（zhí）物資源（如玉米）所提出的澱粉原料製成。澱粉原（yuán）料經由糖化得到（dào）葡萄（táo）糖（táng），再由葡萄糖及一定的菌種發酵製成高純度的乳酸（suān），再通過化學合成方法合成一定分子量的聚乳酸。

Manufacturers of degradable particles believe that PLA is a new type of biodegradable material, which is made from starch raw materials proposed by renewable plant resources (such as corn). Glucose is obtained from starch raw materials through saccharification, and then high-purity lactic acid is produced by fermentation of glucose and certain bacteria, and then polylactic acid with certain molecular weight is synthesized by chemical synthesis.

其具有良好的生物可降解性，使用後能被自然界中微生物完全降解，生成二氧化碳和水，不汙染環境，這對保護環境非常有利，是公認的環境（jìng）友好材料。

It has good biodegradability. After use, it can be completely degraded by microorganisms in nature to generate carbon dioxide and water. It does not pollute the environment, which is very beneficial to environmental protection. It is recognized as an environmentally friendly material.

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