In our life, plastic bags play many roles and styles. Nowadays, the quality of plastic packaging bags circulating in the market is also uneven. When we go to buy, what aspects should we pay attention to? Let's follow Xiaobian to understand what are the options?
Introduction to quality matters of plastic packaging bags
plastic bag
1. Judging the thickness of plastic packaging bags
Packaging bags have strict standards, especially food packaging bags. When choosing, you must choose a plastic packaging bag produced by a regular manufacturer with a mark of conformity. Check whether the plastic bag is clean against the light, all that are qualified are clean, and inferior ones will see dirty things. As long as the single-sided thickness meets the standard, it may not be as thick as possible.
Second, the sound judgment
Judging by "hands-on", a good plastic packaging bag is flexible, it feels lubricated when touched, and the surface looks like wax. A plastic bag with poor quality has stickiness; by "listening to the sound," it is grasped by hand One end of the plastic bag is shaken hard, and the sound of the crisp sound is better. If the sound is dull, the quality may be defective.
3. Judgement of chemical reaction
Judging by "fire" burning, good quality plastic packaging bags are flammable, the flame tip is yellow, partly blue, dripping like a candle tear during burning, and has a paraffin smell; poor quality plastic packaging bags are not flammable and leave the fire It is extinguished, the flame tip is yellow, and the bottom is green. The softening can be drawn, and it has a pungent smell of hydrochloric acid.