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What kind of material is the express package on the market now? It's dark in the outer grey.
- It's a special packing bag for express delivery. That kind of paper bag, like post office, is specially designed to pack the things you want to express.Wrap things up and seal them in a bag.Some sellers or buyers need such bags when they are delivered. Some express to the seller to buy money.s
Why is the higher the elevation, the more food bags inflate? From a physical point of view
- Because the food packaging bag is sealed, the air pressure inside is certain, with the elevation of the outside air pressure gradually decreased, which leads to gas bag outward extrusion pressure increased, so the higher the altitude, the food packaging bag inflated more.s
What can be easily removed from the words printed on plastic bags?
- Depends on what kind of ink, but usually can be wiped out with alcoholUse a clean soft cloth, dip 84 disinfectant, gently wipe, you can remove the plastic bags printed on the printed wordss
What are the soft and hard sides of plastic bags? Material or process technology?
- In general, the soft, and toughness and strength are greater, the quality is the best, most durable. Of course, the price should be higher.As for you, which kind of good, depends on your use, cheap, and can meet the use of, that is good, not necessarily have to buy many high priced! The one that suits you is the best!s
Printing solvent for food packing bag
- Determine the amount of water in the solvent by means of the principle of a different dissolution effect. Take the most transparent glass cylinder tube with 100ml toluene solution, take a small amount of analyte ester solvent such as toluene, evenly pour. When you just pour in toluene, carefully observe whether there is turbidity (milk white) phenomenon. If there is this phenomenon, the water content of the solvent is seriously exceeded, and the experience shows that when the moisture content exceeds 0.5%, the phenomenon is obvious. The water content test of benzene solvent can be carried out by extracting solvent from the long glass tube to observe whether there is delamination.s
What is bread packing? Polyethylene film, waterproof cellophane, etc.
- More importantly, the use of aluminum foil / composite or polyethylene composite or aluminum foil / polyethylene composite material. Although this type of packaging is opaque, it protects against loss of vitamin B1 in bread.s
What's the raw material of the cement packing bag?
- Plastic recycling granulator raw materials can be: Polyethylene (greenhouse film, beverage bottles, lining bags, etc.) or polypropylene (old woven bags, packaging bags, bundled rope, etc.).It is recommended to buy products produced by regular manufacturers, and the quality is more guaranteed.s
What material is the surface of the packing bag such as instant noodles, pickled mustard tuber, small bread and so on? Why should we add this layer?
- First, it is easy to heat seal, otherwise only aluminum foil can not be sealed;Two, high barrier plastic film preservation effect is also very good, can increase its number of layers, reduce aluminum foil thickness, thereby reducing costss
How to remove the double side tape
- preparation： 1, a blade. The knife can be ordinary, not a knife. In special occasions may also be used razor blade. 2, careful. To do so is very simple, but the most important is...
How to removedouble double sided tape for clothes
- How to remove double sided tape for clothes ？About this problem every girl has encountered, although the new clothes are very beautiful, but in order to avoid the embarrassment o...
What are the characteristics and use of self adhesive tape
- Sself adhesive tape is felt for the child group，after dipping high-quality 100 # asphalt saturated and made up.There have been 150 years of history in North America, and has been...
Do you know why the blue masking tape can stick
- Do you know why the blue masking tape can stick?This is because that its surface is coated with a layer of adhesive. The earliest of the adhesive is from animals and plants, and in...
What are the methods to clear packing tape
- We will often receive a lot of gifts in life, the packing paper wrappings more credit for these gift.At times, we are not willing to throw away some of the fine wrapping paper. But...