Degradable bags typically use one or more biodegradable materials that can be decomposed by microorganisms under certain conditions, thereby reducing environmental pollution. According to search results, biodegradable and environmentally friendly plastic bags are made of various biodegradable materials, including PLA (polylactic acid), PHAs (polyhydroxyalkanoates), PBA (polybutadiene acid), PBS (polybutylene succinate) and other polymer materials. These materials can replace traditional PE (polyethylene) plastics.
In addition, new types of biodegradable plastics have been researched and developed, such as using materials such as polycaprolactone (PCL) and polylactic acid (PLA). Through special enzyme encapsulation technology, plastics are more easily decomposed under the action of heat and water.
Biodegradable bags mainly use biodegradable materials, which can be decomposed by microorganisms under certain conditions to reduce environmental pollution. According to the search results, the following are some commonly used biodegradable materials and their characteristics:
1. PLA (Polylactic Acid): Made from renewable resources such as corn starch, it has good transparency and hardness, suitable for manufacturing transparent containers and hard products, but poor hydrolysis resistance.
2. PHAs (polyhydroxyalkanoates): They have good degradation ability and biocompatibility, and can be degraded without relying on industrial composting conditions.
3. PBA (Polybutyric Acid): It has excellent biodegradability, but its specific applications and characteristics are not detailed in the search results.
4. PBS (polybutylene succinate): Similar in performance to PBAT, it has good ductility and elongation at break, is easy to blow film, and is suitable for packaging and agricultural fields.
5. PBAT (Polyadipic Acid/Butylene Terephthalate): Its performance is similar to traditional petroleum based plastics, with good ductility and film-forming properties, suitable for disposable tableware, supermarket shopping bags, and plastic films.
The characteristics of biodegradable bags include:
Environmental friendliness: It can decompose in the natural environment and reduce long-term environmental pollution.
Sustainability: Reduce dependence on oil resources and lower greenhouse gas emissions.
Reusability: It can be cleaned and reused, or recycled and reused.
Safety and hygiene: It usually does not contain toxic additives, making it safer to use.
Degradation conditions: require certain humidity, temperature, and microbial conditions, and may not degrade quickly under certain conditions.
Cost issue: The relatively high production cost limits its large-scale production and application.
However, the development of the biodegradable plastic industry still faces some challenges, such as uncertainty in degradation environmental conditions, the need for technological breakthroughs, and possible performance differences compared to traditional plastics.
