In our lives, the role and style of plastic packaging bags are very many. The quality of plastic packaging bags circulating on the market today is also uneven. When we go to the purchase process, what aspects should we pay attention to? Let us follow the editor to understand what are the options?
1. Judgment of the thickness of the plastic packaging bag
Packaging bags have strict standards, especially food packaging bags. When choosing, choose a plastic bag with a conformity mark produced by a regular manufacturer. Check if the plastic bag is clean by looking at the light. The qualified ones are clean. The inferior ones will see dirty things. As long as the thickness of one side reaches the standard, it may not be as thick as possible.
2. Voice judgment
Judging by "hands-on", good plastic packaging bags are flexible, lubricating when touched, and the surface seems to have wax, and poor quality plastic packaging bags are sticky; One end of the plastic bag shakes vigorously, and the quality of the person who makes a clear sound is better. If the sound is dull, the quality may be problematic.
3. Judgment of chemical reaction
Judging by "fire" burning, good quality plastic packaging bags are flammable, the tip of the flame is yellow, and some are blue in color. When burning, they drip like candle tears and have a paraffin smell; poor quality plastic packaging bags are not flammable and away from fire The flame extinguishes, the tip of the flame is yellow, and the bottom is green, softening can draw, and emits the pungent smell of hydrochloric acid.