PE plastic bags are currently the most widely used on the market, PVC Plastic Bags from the outside, PE plastic bags can be divided into two kinds: translucent and opaque. PVC Plastic Bags According to the density of the division, but also can be divided into two kinds of high density, including low-density PE plastic bags generally appear in the soft and tough; high-density plastic bags products are more durable, but also a lot of supermarkets will be paid to consumers Plastic vest bag.
In fact, this plastic bag and PE plastic bags almost no difference, especially from the appearance point of view, both are translucent, opaque products. But the difference is, PP plastic bags have a stronger physical properties, it is more resistant to corrosion, high temperature, PVC Plastic Bags tear-resistant. We can often see the toilet paper plastic bags, food bags, are made using PP. One of the salient features of this type of plastic bag is that it is tough when it comes to hand, and it is hard to tear it all at once.
PVC plastic bag prices are generally higher, because it is more made into raincoats, quilts and other packaging. It has a transparent perception, texture hard, smooth touch and so on. But it can not be applied to the food retail industry, therefore, there will be no supermarket to use it to do vest bags, it is because it contains chlorine elements, and the human body long-term exposure to chlorine will cause harm to the body.
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 sticky.
Hand shake, sound crisp, easy to float the polyethylene film bag. PVC Plastic Bags While the hand shake the voice of the low is the PVC film bag.
In case of fire flammable, the flame was yellow, PVC Plastic Bags 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.
The plastic bag immersed in water, hand pressed into the water, PVC Plastic Bags 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, PVC Plastic Bags 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, PVC Plastic Bags if there are colorful, dazzling green flame, then this plastic material contains chlorine, belonging to the PVC material.