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The difference between PVC and EVA
Jul 04, 2018

In life, we often hear about PVC bags, EVA bags, etc., but what is PVC, what is EVA, do you know? What is the difference between PVC and EVA? Let’s look at the PVC bag factory. Look.

PVC is polyvinyl chloride

It is a polymer material that uses a chlorine atom to replace one hydrogen atom in polyethylene.

The most important feature of PVC is its flame retardant, so it is widely used in fire protection applications. However, polyvinyl chloride releases hydrochloric acid and other toxic gases during combustion.

Features: (1) low thermal conductivity, that is, good thermal insulation effect; (2) excellent acoustic damping, that is, good sound insulation; (3) good performance in secondary molding, similar to wood, can be sawed, nailed , can be planed, can be drilled, and can also be bonded; (4) high flame retardancy, that is, good fire resistance; (5) stable chemical properties, excellent chemical resistance; (6) excellent weather resistance, (7) The foaming technology of PVC can effectively reduce the resin content per unit volume of the product, thereby reducing the cost of the product; (8) PVC low foaming products have no pollution to the environment, and Recyclable, it is a green product. (Research by foreign experts proves that PVC is harmless to the environment. A research report published by the European PVC Products Committee at the beginning of this century shows that PVC is not easy to decompose, and the inclusion of PVC products in the waste that needs to be deeply buried will not cause harm to the environment. .

PVC bag factory

EVA: ethylene-vinyl acetate copolymer, that is, low foaming polyethylene foam plastic.

EVA rubber and plastic products are new environmentally friendly plastic packaging materials, which have good buffering, shock resistance, heat insulation, moisture resistance, chemical resistance and corrosion resistance. They are non-toxic and non-absorbent. EVA rubber and plastic products are designed and formed, and their shockproof performance is superior to traditional packaging materials such as polystyrene (foam), and meets environmental protection requirements. It is the best choice for export products. Compared with shockproof packaging, it can be cut and formed; it can be used for a wider range of applications due to the large difference in density.

Characteristics of EVA: Water resistance: closed cell structure, non-absorbent, moisture-proof and water-resistant. Corrosion resistance: resistant to corrosion by seawater, oil, acid, alkali and other chemicals, antibacterial, non-toxic, odorless, non-polluting. Processability: no joints, and easy to hot press, cut, glue, fit and other processing. Anti-vibration: high resilience and high tensile strength, high toughness and good shock/cushion performance. Insulation: heat insulation, heat preservation and low temperature performance, can withstand severe cold and exposure. Sound insulation: closed cells, good sound insulation.

EVA bag

The above is the difference between PVC and EVA materials. In fact, PVC bag factory tells us that these two materials are widely used and are environmentally friendly materials, so you can buy them with confidence.