PVC plastic bag it is true yellowish translucent, shiny. Transparency is better than polyethylene, polypropylene, worse than polystyrene, with the amount of different additives, divided into soft, hard polyvinyl chloride, soft soft and tough, feel sticky, hard hardness is higher than low-density polyethylene, And lower than the polypropylene, in the inflection will appear whitening phenomenon. Common products: sheet, pipe, soles, toys, doors and windows, wire sheath, stationery and so on. Is a polymer material that uses a chlorine atom to replace one of the hydrogen atoms in polyethylene.
PVC (polyvinyl chloride) chemical and physical properties Rigid PVC is one of the most widely used plastic materials. PVC material is a non-crystalline material. PVC material in the actual use of often added stabilizers, lubricants, auxiliary processing agents, colorants, reinforcing agents and other additives
In daily life, people contact more plastic bags (film), the general PVC (PVC) and polyethylene (PE) plastic film (bag), how to distinguish between the two of them, the following summary of several simple methods :
⑴ touch method
Hand touching a sense of lubrication, the surface painted like a layer of wax (chemical known as wax sense), which is non-toxic polyethylene film bags, and PVC film is some sticky
⑵ jitter method
Hand shake, sound crisp, easy to float the polyethylene film bag. While the hand shake the voice of the low is the PVC film bag.
⑶ combustion method
In case of fire flammable, the flame was yellow, burning with paraffin oil dripping, and the candle burning gas, is a non-toxic polyethylene film bag. If not easy to burn, from the fire that is extinguished, the flame was green, for the PVC film bag.
⑷ immersion method
The plastic bag immersed in water, hand pressed into the water, can surfaced for the polyethylene, sink into the bottom of the polyvinyl chloride (polyethylene density is less than water, PVC density is greater than water; at room temperature were about 0.92 g / cm3 and 1.4 g / cm3).
In addition, you can also take a copper wire, burned in the fire red, and then the copper wire and test plastic film contact, resulting in chemical changes, then dipped in the plastic composition of the copper wire back into the flame. At this time to be carefully observed, if there are colorful, dazzling green flame, then this plastic material contains chlorine, belonging to the PVC material.
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