PLA+PBAT包裝袋的材質(zhì)特點(diǎn)

在詳細(xì)介紹兩種材料之前，要先了解當(dāng)前塑料市場(chǎng)的現(xiàn)狀。在尋求從根源上解決“塑料污染”的過(guò)程中，除了尋找全新的環(huán)境友好型替代材料，很重要的一種手段就是在現(xiàn)有塑料材料中找到能夠被環(huán)境降解，成為生態(tài)循環(huán)一個(gè)環(huán)節(jié)的環(huán)境友好型材料，這樣既節(jié)省了大量的人力、物力成本投入，又能在短時(shí)間內(nèi)緩解當(dāng)前嚴(yán)峻的環(huán)境污染問(wèn)題。

Before introducing the two materials in detail, it is necessary to first understand the current situation of the plastic market. In the process of seeking to fundamentally solve "plastic pollution", in addition to finding new environmentally friendly alternative materials, an important means is to find environmentally friendly materials that can be degraded by the environment and become a link in the ecological cycle in existing plastic materials. This not only saves a lot of manpower and material costs, but also can alleviate the current severe environmental pollution problem in a short period of time.

PLA+PBAT降解料自粘袋

PLA+PBAT degradable material self-adhesive bag

從可降解的視角出發(fā)，相關(guān)材料又可以分為生物降解塑料、光降解塑料、水降解塑料等，而這些降解方式中又可以按照降解程度的不同分為部分降解和全降解，通過(guò)對(duì)比各類(lèi)降解機(jī)理的實(shí)用性和可操作性，生物降解脫穎而出。

From the perspective of biodegradability, relevant materials can be divided into biodegradable plastics, photo degradable plastics, water degradable plastics, etc. Among these degradation methods, partial degradation and total degradation can be divided according to the degree of degradation. By comparing the practicality and operability of various degradation mechanisms, biodegradation stands out.

其次，關(guān)于生物降解塑料的對(duì)比與選擇。生物降解塑料一般包括：一、合成全生物降解高分子材料（PLA、PBAT、PBS、PPC、PGA等脂肪族聚酯及脂肪-芳香共聚酯）。二、由前面提到的降解塑料或者上述降解塑料和其他可降解物質(zhì)復(fù)合而成的多組分體系，又可以分為：①上述材料之間為了調(diào)控性能與功能，而制備的多組分體系，如 PBAT/PLA/淀粉、PBAT/PLA/PCL、PBAT/PGA。②上述材料與天然礦物材料組成的復(fù)合體系，如PBAT/PLA/CaCO3，PBAT/PLA/Talc。③上述材料與環(huán)保增塑劑組成的體系，如淀粉/甘油等。

Secondly, regarding the comparison and selection of biodegradable plastics. Biodegradable plastics generally include: 1. Synthetic fully biodegradable polymer materials (PLA, PBAT, PBS, PPC, PGA and other aliphatic polyesters and fatty aromatic copolyesters). 2、 A multi-component system composed of degradable plastics or other degradable substances can be further divided into: ① multi-component systems prepared between the aforementioned materials to regulate performance and function, such as PBAT/PLA/starch, PBAT/PLA/PCL, PBAT/PGA. ② composite systems composed of the aforementioned materials and natural mineral materials, such as PBAT/PLA/CaCO3, PBAT/PLA/Talc. ③ systems composed of the aforementioned materials and environmentally friendly plasticizers, such as starch/glycerol.

PLA，又稱聚丙交酯，因其多由乳酸環(huán)狀二聚體（即丙交酯）開(kāi)環(huán)聚合制備而得名，具有良好透明度、光澤性、性、耐酸堿性等特性，擁有良好的生物降解性能，材料性能優(yōu)良，未來(lái)應(yīng)用領(lǐng)域大，預(yù)計(jì)未來(lái)在日用品領(lǐng)域、紡織領(lǐng)域、醫(yī)療衛(wèi)生等領(lǐng)域有大規(guī)模應(yīng)用，替代市場(chǎng)空間廣闊。

PLA， Also known as poly (lactide), it is named after the ring opening polymerization of lactic acid cyclic dimers (i.e. lactide). It has good transparency, luster, antibacterial properties, acid and alkali resistance, good biodegradability, excellent material properties, and a wide range of future applications. It is expected to have large-scale applications in the fields of daily necessities, textiles, medical and health, and has broad market space for substitution.

PBAT，是己二酸丁二醇酯和對(duì)苯二甲酸丁二醇酯的共聚物，兼具PBA和PBT的特性，既有良好的延展性、斷裂伸長(zhǎng)率、耐熱性和抗沖擊性能，又具有優(yōu)良的生物降解性。成膜性能良好，通常與PLA樹(shù)脂等共混改性制成終端產(chǎn)品，可用于塑料包裝薄膜、農(nóng)用地膜、一次性用具等。

PBAT， It is a copolymer of butylene adipate and butylene terephthalate, which combines the characteristics of PBA and PBT. It has good ductility, elongation at break, heat resistance, and impact resistance, as well as excellent biodegradability. Good film-forming performance, usually blended and modified with PLA resin to form terminal products, which can be used for plastic packaging films, agricultural films, disposable utensils, etc.

PLA+PBAT包裝袋

PLA+PBAT packaging bag

降解塑料的產(chǎn)業(yè)化潛力受到性能、改性難度、合成技術(shù)和等多種因素的影響，如果某種降解塑料的短板不能夠被改善，或者改善的成本過(guò)高，其產(chǎn)業(yè)化潛力將受到影響。

The industrialization potential of degradable plastics is influenced by various factors such as performance, modification difficulty, synthesis technology, and price. If the shortcomings of a certain degradable plastic cannot be improved, or the cost of improvement is too high, its industrialization potential will be affected.

目前來(lái)看，PLA+PBAT包裝袋的產(chǎn)業(yè)化程度較高，也是我國(guó)目前大力發(fā)展的方向。PLA+PBAT包裝袋的應(yīng)用領(lǐng)域雖有重疊之處，但各自特點(diǎn)不同，比如PLA屬于硬塑料，而PBAT屬于軟塑料，可近似看作石化產(chǎn)品中的聚丙烯和聚乙烯。而且，吹膜加工性差的PLA做膜袋多與韌性好的PBAT共混，可在提高吹膜加工性的同時(shí)又不損害其可生物降解性。

At present, the industrialization level of PLA+PBAT packaging bags is relatively high, which is also a direction of vigorous development in China. Although there is overlap in the application fields of PLA+PBAT packaging bags, their respective characteristics are different. For example, PLA belongs to hard plastics, while PBAT belongs to soft plastics, which can be approximated as polypropylene and polyethylene in petrochemical products. Moreover, PLA bags with poor processing ability are often blended with PBAT bags with good toughness, which can improve the processing ability of blown films without compromising their biodegradability.

因此，PLA+PBAT包裝袋因其優(yōu)良的應(yīng)用性能和實(shí)用性成為市場(chǎng)選擇的答案，獲得市場(chǎng)高度認(rèn)可，終迅速占據(jù)可降解塑料市場(chǎng)的半壁江山。

Therefore, PLA+PBAT packaging bags have become the best choice for the market due to their excellent application performance and practicality, gaining high market recognition and quickly occupying half of the biodegradable plastic market.

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