One is "not fully degradable plastics". Generally for "pe+ starch" or "pe+ disintegrating agent" composition, many companies have sales. This material will decompose quickly after the use of the starch, but the part of the PE is still difficult to degrade. However, due to the decomposition of starch in the material left gaps, to a certain extent, can accelerate the degradation of PE. The disintegrating agent can not completely degrade the PE, but only after the use of the film fragmentation into small pieces. Therefore, this material can not be called the degradation material, according to our country degradable material standard GB/T 20197-2006, it is not in the column.
Prices are generally very cheap, and the existing PE price difference is not big. The other is "fully degradable plastics". Generally divided into poly-hydroxy acid, poly (diethylene glycol) two types. Poly (hydroxy acid) includes PLA, PHV, PHBV and so on. Poly (diethylene glycol) includes PBS, PBSA, Pbat and so on. Can be directly made of plastic bags are PHBV, PBS, PBSA, Pbat and modified PLA and so on. Such materials are generally more expensive, usually four to 60,001 tons, domestic consumers are more difficult to accept. In order to reduce costs, there are manufacturers in such materials to add starch and other substances, but the performance will be reduced, the cost of decline is not very obvious.