HOME > INDUSTRY NEWS>view
Can acetate eyewear be biodegradable?
22-05-23 18:26:01 By Bestsea eyewear
Eyewear are one of our most common products, and acetate eyewear are the most popular glasses at present. So, Can acetate eyewear be biodegradable? Below is a pair of acetate sunglasses made of biodegradable acetate。
The invention of plastic has brought people's life into a convenient and fast mode. Plastic bottles, plastic bags, plastic glasses, etc., common items in life can be found everywhere. Due to its difficulty in degradation, unprecedented white pollution has also appeared in our lives. International organizations, countries, societies, and people in various industries are also aware of the harm that plastics bring to human society and the natural environment, so they are all performing their own duties and making their own changes and contributions in their own posts as much as possible. .
For example: our client recently wanted to place an order with a new design. The new design is a combination frame. We originally planned to use acetate and metal for production. However the customer takes the initiative to propose whether we can use environmentally friendly acetate to reduce the harm to the environment!
Thumbs up for the guest's thoughts! The global village is protected by everyone from all over the world!
Can acetate eyewear be biodegradable?
In the process of looking for acetate material, we learned from acetate material suppliers that bioplastic and recycled plastics are commonly used, but recycled plastics can only be purchased with ISC certification. Bestsea eyewear manufacturer's ISC certification is still under application. After the ISC certification comes down, we will update it on the website in time. Today we focus on bioplastic and bioplastic eyewear.
1. Why are there bioplastics?
In response to the emergence of white pollution, from a global perspective, the harm caused by plastic waste to the earth is self-evident. As long as there are human activities, there will be traces of white pollution. In the 150 years since the invention of plastics, under the action of ocean currents, three large-scale plastic garbage dumps were formed in the Pacific Ocean. Only 1.2% of the global plastic production in 65 years was recycled, and most of the rest were buried under the feet of humans, waiting for 600 years to degrade.
Let's take a look at the specific hazards of "white pollution": 1. It is not easy to decay, the garbage is piled up, and it takes up space for human activities; 2. Improper incineration will cause secondary pollution to the environment, and the incineration process will produce toxic substances and waste resources. 3. It is not easy to decompose when buried in the ground, and the additives used for modification in the polymer materials will gradually leak out, causing damage to water quality and soil. Some polymer materials degrade for hundreds of years, occupying a large amount of Landfill space 4. Floating in water causes marine pollution, endangers the survival of animals and plants, and destroys ecosystems.
Therefore, in recent years, human beings have gradually developed biodegradable materials, and found that biodegradable materials are a good alternative to traditional plastics and a high-quality solution to white pollution. In order to curb "white pollution", China implemented a plastic restriction order in 2008, and research and development of environmentally friendly and sustainable degradable materials has become an important direction for the industry.
2. What is biodegradable material?
Biodegradable materials, the most common idea is that if a material is biodegradable and you drop it on the ground, it will break down over time and disappear, which is not the case. It refers to the degradation caused by the action of microorganisms existing in nature under conditions such as soil or sandy soil in nature, or under specific conditions such as composting conditions or anaerobic digestion conditions or in aqueous culture medium, and finally completely degraded into carbon dioxide. (CO2) and methane (CH4), water (H2O) and mineralized inorganic salts of the elements it contains, as well as new biomass (such as dead microorganisms, etc.).
3. Degradation process
4. First of all, when biodegradable materials are thrown into nature, after certain conditions (soil, sand, compost, anaerobic, aqueous culture medium, etc.), they are naturally decomposed into small pieces, which is essentially the process of polymer fracture, and then through external conditions It is decomposed into macromolecules, and then decomposed into small molecules. After being absorbed by microorganisms, carbon dioxide and water are released. At the same time, plants release oxygen through photosynthesis.
Example: During our search for biodegradable sheets for our customers, we learned on the website of our sheet supplier Mazzuccheli that biodegradable sheets must reach 90% within an incubation time of no more than 6 months. The experiment proved that after 115 days of incubation, the degree of biodegradation of M49 has exceeded 90%.
4. What types of biodegradable materials are there?
At present, the most widely used are mainly divided into four categories, PLA (polylactic acid), PBS (polyester), PBAT (polyester), PHA (polyhydroxyalkanoate).
PLA: It is one of the most common degradable plastics. It is a polymer obtained by polymerizing lactic acid as the main raw material. The production process of PLA is pollution-free, and the product is biodegradable. The used PLA can be degraded into carbon dioxide and water by composting at a temperature higher than 55 °C or under the action of oxygen enrichment and microorganisms, realizing the material cycle in nature, and will not harm to the environment. PLA also has reliable biosafety, biodegradability, good mechanical properties and ease of processing, and is widely used in packaging, textile industries, agricultural mulching films, and biomedical polymers. The disadvantage of PLA is that the degradation conditions are relatively harsh. However, due to the relatively low cost of PLA among biodegradable plastics, the consumption of PLA is at the forefront.
PBS: It is formed by the condensation polymerization of succinic acid and 1,4-butanediol. The main source of raw materials is the fermentation of petroleum or biological resources. PBS is easily decomposed into carbon dioxide and water by various microorganisms or enzymes in nature, and has good biocompatibility and bioabsorbability, as well as good heat resistance. PBS can be used in packaging films, tableware, foam packaging materials, daily necessities bottles, medicine bottles, agricultural films, pesticides and fertilizer slow-release materials and other fields.
PBAT: belongs to thermoplastic biodegradable plastics. Generally, aliphatic acids and butanediol are used as raw materials. They are produced by petrochemical or biological fermentation. They have good ductility and elongation at break, as well as good heat resistance and impact performance. Due to its good film-forming properties and easy film blowing, PBAT is widely used in the field of disposable packaging films and agricultural films. In addition, PBAT also has excellent biodegradability and is one of the most active and widely used biodegradable materials in the research of degradable plastics.
PHA: PHA degradable plastics include polyhydroxyalkanoate (PHA), poly3-hydroxybutyrate (PHB) and other categories. PHA has a very special degradation method. After use, PHA can be completely degraded into β- Hydroxybutyric acid, carbon dioxide and water. PHAs degradable plastics have high heat distortion temperature and good biocompatibility, but have narrow processing temperature range, poor thermal stability, high brittleness, unstable production quality, and can be used in disposable products, medical equipment surgical gowns, packaging bags and Compost bags, medical sutures, repair devices, bandages, orthopedic needles, anti-adhesion films and stents, etc.
5. The new carbon cycle.
The production and use of bio-based materials has the dual advantage of reducing the use of fossil fuels (limited fuels) on the one hand, and reducing greenhouse gas emissions on the other. It must be considered that the raw materials used in the M49 formulation are wood cellulose acetate and plant-derived plasticizers. These two components give rise to the process of chlorophyll photosynthesis during its life cycle: in extreme synthesis, this process takes carbon dioxide from the atmosphere to generate vital energy for vegetation, converting it into oxygen.
