PVC Plastic Bags In daily life, people contact more plastic bags (film), General polyvinyl chloride (PVC) and polyethylene (PE) plastic film (bag), how to distinguish between them, PVC Plastic Bags the Engineering Plastics Technical Forum summed up a few simple methods:
Shan Touch method
Touch with the hands of the lubrication, the surface like a layer of wax (chemical called wax), which is non-toxic polyethylene film bag, PVC Plastic Bags and PVC film feel some hair sticky.
Shan Jitter Method
With the hand jitter, the sound is crisp, the quality is easy to float is polyethylene film bag. The low volume of the hand jitter is polyvinyl chloride film bag.
Shan Combustion method
Flammable fire, the flame is yellow, burning paraffin-like oil dripping, and candles burning when the gas, is non-toxic polyethylene film bag. If it is not easy to burn, PVC Plastic Bags from the fire is extinguished, the flame is green, PVC film bag.
Shan Immersion Water Law
The plastic bag immersed in the water, with the hand pressed into the water, can surface to the surface of polyethylene, sank into the bottom of polyvinyl chloride (polyethylene density is less than water, PVC Plastic Bags PVC density is greater than water, at room temperature, respectively, about 0.92g Cm3 and 1.4g Cm3).
In addition, the copper wire is also desirable, in the fire red, and then, the copper wire with the test plastic film contact, produce chemical changes, and then dipped in the plastic elements of the copper wire back into the flames. It should be carefully observed, if there is a colorful, dazzling green flame, it is indicated that this plastic material contains chlorine elements, belong to polyvinyl chloride material.
Rigid PVC is one of the most widely used plastic materials. PVC is a kind of vinyl polymerization material, its material is a kind of amorphous material. PVC materials are often used in the actual use of stabilizers, lubricants, auxiliary processing agents, color materials, anti-impact agents and other additives. PVC Plastic Bags It has the advantages of non-flammable, high strength, weather resistance and excellent geometrical stability. PVC has a strong resistance to oxidants, reducing agents and acid. However, it can be corroded by concentrated sulfuric acid, concentrated nitric acid, and also does not apply to the occasion of contact with aromatic hydrocarbons and chlorinated hydrocarbons. PVC Plastic Bags The melting temperature of PVC during processing is a very important process parameter, if this parameter is improper, it will cause the problem of material decomposition. The flow characteristic of PVC is very poor, and its process range is very narrow. Especially, the large molecular weight of PVC material is more difficult to process (this material is usually added to the lubricant to improve the flow characteristics), so usually used in small molecules of PVC material. PVC shrinkage Rate is very low, generally 0.2. PVC can be divided into soft PVC and hard PVC. PVC Plastic Bags The hard PVC accounted for about 2/3 of the market, soft PVC accounted for 1/3. Soft PVC is commonly used in flooring, ceilings and leather surface, but because soft PVC contains softener (which is also the difference between soft PVC and hard PVC), easy to brittle, not easy to save, so its scope of use has been limited. Hard PVC does not contain softener, so flexibility is good, easy to shape, not easy to crisp, non-toxic non-polluting, long save time, PVC Plastic Bags so has a great development and application value. Hereinafter referred to as PVC.