Brief introduction of vest bag

2022-12-05 09:59:34 Rowling

Brief introduction of vest bag

Vest bag, also known as vest bag, is a kind of common plastic bag, which is named after its shape resembling a vest. The vest bag is easy to make and has a wide range of uses. It has become an indispensable necessity for people in daily life, providing people with great convenience, but at the same time it also causes environmental pollution. Vest bags with less than 2.5 silk on one side to limit the amount of vest bags.


[1] Plastic vest bags are the most common in people's daily life, and different regions also have different titles, such as vest bags, convenience bags, advertising bags and so on. Vest bags are widely used in shopping malls, supermarkets, convenience stores, wholesale markets and other places, and the amount of use is huge, which has caused long-term impact on the ecological environment. For this reason, the country promulgated the "Plastic Ban Order", prohibiting the production of plastic vest bags with a single layer thickness of less than 0.025mm, so as to limit its usage.

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Vest bags are mostly made of high-density polyethylene (HDPE), and the material is relatively hard. High Density Polyethylene (HDPE for short) is a non-polar thermoplastic resin with high crystallinity. The appearance of the original HDPE is milky white, and the thin section is translucent to a certain extent. PE has excellent resistance to most domestic and industrial chemicals. Certain classes of chemicals can cause chemical corrosion, such as corrosive oxidizers (concentrated nitric acid), aromatic hydrocarbons (xylene) and halogenated hydrocarbons (carbon tetrachloride). The polymer is non-hygroscopic and has good water vapor resistance for packaging purposes. HDPE has good electrical properties, especially the high dielectric strength of the insulation, making it very suitable for wires and cables. Medium to high molecular weight grades have excellent impact resistance at room temperature or even down to -40F.

Production Process

The production process of the vest bag is as follows: blow molding - printing - sealing and cutting - forming.

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Production standards

According to the "Plastic Ban Order" issued by the state, the thickness of the vest bag should not be less than 0.025mm for a single layer.

Author Rowling


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