Identify the above plastic bags of simple methods:
1, touch method: touch with a lubricating feeling, the surface as coated with a layer of wax (chemically known as the wax sense), which is non-toxic polyethylene film; and polyvinyl chloride film touch some sticky.
2, shaking method: hand shaking sound crisp, is non-toxic polyethylene film; hand shaking sound low for PVC film plastic bags.
3, combustion method: ignite when exposed to fire, the flame is yellow, burning paraffin-like oil droplets dripping. And the odor of burning candles, is a non-toxic polyethylene film; if not easy to burn, away from the fire that is extinguished, the flame is green for the polyvinyl chloride film plastic bags.
4, immersion method: the plastic bag will be immersed in water, the hand will be pressed into the water can float to the surface of the non-toxic polyethylene film; sink to the bottom of the water for the polyvinyl chloride film plastic bags. Polyethylene English abbreviation PE, it is a polymer of ethylene, non-toxic. Easy to color, good chemical stability, cold resistance, radiation resistance, good electrical insulation. It is suitable for food and drug packaging materials, the production of food utensils, medical equipment, but also can be done in the electronic industry, such as insulation materials.
Polyvinyl chloride text referred to as PVC, is a polymer of vinyl chloride. It is chemically stable, resistant to acid, alkali and some chemicals. It is resistant to moisture, aging, flame retardant. It can not be used at a temperature of more than 60 ℃, in the low temperature will be hardened. Polyvinyl chloride is divided into soft plastic and hard plastic. The soft plastic is mainly made into film for packaging materials, rainproof products, agricultural seedling film, etc. It can also be used as insulation layer for cables and wires, and artificial leather products. Rigid generally made of pipe and sheet, pipe used as water pipes and transport corrosion-resistant fluid pipe, sheet used as a variety of storage tank lining and flooring. Polyvinyl chloride (PVC) resin is not toxic, polyvinyl chloride monomer is highly toxic, polyvinyl chloride products are toxic or not, depending on its residual monomer in the polymerization process is removed to a certain requirement, and the second is to look at its processing additives added in the process of toxic or not. Such as PVC food cling film in the vinyl chloride monomer if the content is too high, especially in microwave ovens and other high-temperature environments, easy to decompose the human body has a carcinogenic effect of substances; in addition, the processing of PVC cling film with plasticizers, stabilizers, etc. If the choice of a bad, but also prone to certain hazards to the human body.