Nowadays, in the environment of green and environmental protection, more and more customers and consumers begin to pay attention to the environmental protection of plastic bags, and begin to understand green degradable plastic bags, so how to distinguish between "pseudo-degradable" and "full-degradable"? First of all, we need to know what pseudo-degradable plastic bags and fully degradable plastic bags are.

Pseudo-degradable plastic bags

It refers to the addition of a certain amount of additives in the plastic production process to reduce its stability and make it easier to disintegrate in the natural environment, such as photodegradation, thermal oxidative degradation and other pseudo-degradable plastic bags. Although this plastic product can disintegrate, it cannot be completely degraded. And this petroleum-based product is organically decomposed by chemical reactions rather than microorganisms, so it cannot be completely decomposed into organic matter, but will be decomposed into tiny fragments and enter the environment. These microplastics are ingested by animals and enter the food chain, and can eventually return through the biosphere Human society causes major problems.

So is PE plus starch considered pseudo-degradation? Strictly speaking, plastic products containing non-biodegradable polymer materials such as PE, PP, PS, PVC, EVA, PET, etc. are considered as Non-degradable plastic products.

Fully biodegradable plastic bag

Fully degradable plastic bags mean that plastic bags can be completely degraded into water and carbon dioxide. This fully degradable material is mainly PBAT, PLA, PBS, PPC, PHA, and PCL. For example, corn, cassava, etc. are processed into lactic acid, that is, polylactic acid PLA. These polymers, which have good biodegradability, can be completely degraded by microorganisms in nature under specific conditions after use, and finally generate carbon dioxide and water. They do not pollute the environment and are very beneficial to protecting the environment. They are recognized as environmentally friendly materials.

After understanding the definitions of the two, we can learn how to distinguish them.

1. With double j logo: the main ingredients marked below are not PE, but PBAT, PLA, ST (starch), MD (such as CaCO3 and other minerals), etc., and the color is mostly white translucent or light yellow; but the market There will also be companies with random double js in the market, which is a matter of market supervision.

The "14th Five-Year" Circular Economy Development Plan issued by the National Development and Reform Commission requires strengthening market supervision, severely cracking down on illegal production and sales of plastic products that are prohibited by the state, and strictly investigating and punishing degradable plastics with false labels and counterfeit labels.

2. Observe the appearance: the raw materials of fully degradable plastic bags are PLA, PBAT, starch or mineral powder materials, and there will be special marks on the outer bag, such as the common "PBAT+PLA+MD", while for pseudo-degradable plastic bags, the raw materials It is PE and other materials, common ones include "PE-HD" and so on.

3. Hand touch: Due to different raw materials, the feel of the two is also very different. Unlike degradable plastic bags with a plastic feel, fully degradable plastic bags feel silky and soft to the touch.

4. Smell its smell: Pseudo-degradable plastic bags are usually tasteless or plastic-smelling, while fully degradable plastic bags, especially starch-based bags, will have a little grain fragrance, and the material itself will also have some fragrances such as corn and cassava.

5. Combustion test: Black smoke and pungent smell will be produced during the incineration of traditional plastic bags, and finally burned particles will be left. However, there is no thick smoke and pungent smell in the incineration of fully degradable plastic bags. After burning, only organic powder remains, which can be decomposed and absorbed.

Biodegradable plastic bags VS fully biodegradable plastic bags

6. Price difference: Due to the limitation of material capacity and cost, the current price of good-quality biological plastic bags in large supermarkets is basically 0.5-1 yuan per bag, which is higher than the traditional plastic bags of only about 0.2 yuan. Not a lot.

Henan Techuang Biotechnology Co., Ltd. is a modern green and environmental protection enterprise integrating R&D, production, sales and technical services, providing services for biodegradable plastic bags and products. For more information, please visit the official website of Baydeebio: www.baydeebio.com