Biodegradable plastic refers to a type of plastic whose various properties meet the requirements of use during the storage period and can be degraded into environmentally harmless substances under natural conditions after use. It is considered to be one of the effective ways to solve the problem of plastic pollution.

So, what are the biodegradable plastics? Currently, the most common ones are PLA, PBAT, PHA, PCL, PBS, PPC, etc.

one,Introduction to Biodegradable Plastics

常见的可生物降解塑料及其命名缩写

1、PLA

PLA is the abbreviation of polylactic acid, and its full English name is Polylactic Acid or Polylactide. It is the condensation product of α-hydroxypropionic acid and is a type of thermoplastic aliphatic polyester.

PLA结构式

PLA is a light yellow transparent solid with good thermal stability. Its processing temperature is 170-230℃. It has good solvent resistance and can be processed in a variety of ways, such as extrusion, spinning, biaxial stretching, and injection blow molding.

2、PBS

PBS, which is called polybutylene succinate in Chinese, is a type of polyester. It is made of aliphatic succinic acid and butanediol as the main raw materials. Due to the limited raw materials of succinic acid in my country, PBS derivatives PBAT and PBSA were born. The following is the structural formula of PBS, the structural formula of each monomer, and the names of various polyesters.

PBS结构式

PBS has the advantages of good heat resistance, good softness, good compatibility, and low-temperature heat sealing, but PBS has poor transparency and low tear strength.

In addition to the above characteristics, PBS has very good processing performance and can be used for various molding processes on general processing equipment. It has the best processing performance among the general-purpose biodegradable plastics. Almost all molding and processing methods used for current resin materials (blow molding, injection molding, extrusion molding, sheet molding, foam molding, vacuum molding, etc.) can be applied to the processing of PBS.

3、PBAT

PBAT, whose Chinese name is polybutylene terephthalate-adipate, has the structural formula shown in the figure below.

PBAT结构式

PBAT is a semi-crystalline polymer with a crystallization temperature of around 110°C, a melting point of around 130°C, and a density between 1.18g/ml and 1.3g/ml. The crystallinity of PBAT is about 30%, and the Shore hardness is above 85. It has good ductility, elongation at break, heat resistance, and impact resistance.

4、PHA

Polyhydroxyalkanoates (PHA for short) are aliphatic copolyesters of different structures synthesized by microorganisms through fermentation of various carbon sources. The most common ones are poly 3-hydroxybutyrate (PHB), polyhydroxyvalerate (PHV) and copolymers of PHB and PHV (PHBV). The basic structure is shown in the figure below.

PHA结构式

As a natural polymer material, PHA has the basic characteristics of common polymers, such as thermoplasticity or thermal processability. At the same time, PHA also has some special material characteristics, such as nonlinear optical activity, piezoelectricity, gas barrier properties, etc. Its basic properties are similar to those of polypropylene.

5、PCL

Poly-ε-caprolactone (PCL) is a low-melting-point polymer obtained by ring-opening polymerization of ε-caprolactone, and its melting point is only 62°C.

PCL结构式

Compared with PLA, PCL has better hydrophobicity, but its degradation rate is slower; at the same time, its synthesis process is simple and the cost is low. PCL has excellent processing performance and can be made into films and other products using ordinary plastic processing equipment.

6、PPC

Polypropylene carbonate, abbreviated as PPC (Polypropylene carbonate), is an aliphatic polyester synthesized from carbon dioxide (CO2) and propylene oxide.

PPC结构式

As a new type of thermoplastic polymer, PPC has a series of excellent characteristics such as good biocompatibility, high barrier properties, impact resistance, transparency and non-toxicity.

two,Application in the field of electronic cigarettes

1. Injection molding of cigarette cartridge main parts

图源自 碧嘉材料演讲PPT 

advantage:

• The material crystallizes quickly and the production efficiency is high;

• The material has good crystallinity and high heat resistance, up to 150 degrees Celsius. The performance is stable within the degradable period;

• The material has small crystal particles and the heat-resistant product has good transparency. You can see the remaining amount of smoke oil;

• The materials meet food grade requirements, low carbon and environmentally friendly!

2.Smoke pipe main part injection molding products

advantage:

• The material is formed by ordinary molds and is heat-resistant to 80 degrees Celsius;

• The material has high impact strength and stable performance during the degradable period;

• The materials meet food grade requirements, low carbon and environmentally friendly!

3. Electronic cigarette contact soft packaging

advantage:

• The thickness of about 1MM can be used as a cushion bag for electronic products. The material is very soft and will not damage the screen and paint surface.

• Thickness above 2MM can be used as cushion.

4. Electronic cigarette product inner support cushioning packaging

图源自 碧嘉材料演讲PPT 

advantage:

• Green, environmentally friendly and low carbon;

• Product support, good cushioning performance;

• Lower cost than wood pulp products.

5. Degradable transparent thin packaging

图源自 碧嘉材料演讲PPT 

advantage:

• The material is low-carbon, environmentally friendly, transparent, and has a light transmittance of more than 90%;

• Suitable for anti-scratch film for electronic outer packaging, high-transparency packaging bags for products, skylight film, etc.

three. Application of biodegradable materials in filters for traditional cigarettes and HNB

图源自 碧嘉材料演讲PPT

来源：艾邦根据碧嘉材料演讲PPT整理

电子雾化与HNB产品都是新型电子产品，结构虽小，却融合应用多种材料、表面处理、芯片电子等技术工艺，而且雾化技术一直在不断更迭，供应链在逐步完善，为了促进供应链企业间有一个良好的对接交流，艾邦搭建产业微信群交流平台，欢迎加入；Vape e-cigarettes (VAPE) and Heat-Not-Burn e-cigarettes (HNB) are both emerging electronic products. Despite their compact size, they integrate various materials, surface treatment technologies, chip electronics, and other advanced technical processes. Moreover, atomization technology is constantly evolving and the supply chain is being progressively perfected. To facilitate good communication and networking among supply chain enterprises, Aibang has established an industry WeChat group communication platform and warmly welcomes interested enterprises to join.

资料下载：

2022年1月6日电子雾化高峰论坛会议资料分享

2021年第三届电子烟展会论坛PPT分享

第六届电子烟暨低温本草产业论坛资料分享

通讯录：

电子烟厂商万人通讯录，供应链名单欢迎点击加入，也可以点击下方关键词筛选

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