Q:Do vacuum packing bags have to be vacuum packed?

Vacuum packaging bags and vacuum packaging machines are related. Vacuum packaging machine not only can complete vacuum extraction, but also can complete heat sealing packaging in vacuum, and ensure vacuum in vacuum bag can meet the requirement.

Q:How many kinds of packing bags are there in the packaged foods?

PE's softness and mechanical properties are worse than those of PP. It represents shopping bags, plastic wrap, garbage bags and so on.PP is stiffer, anisotropic (with a notch that is easily ripped), has good mechanical properties, and is superior to PE in high-temperature performance, representing bread bags.I wonder if this answer has met your requirement.

Q:Printing solvent for food packing bag

Look at the appearance of the solvent. Should be clear and transparent, if there are cloudy and floating objects, the batch of solvents should be used with caution.

Q:What products need plastic packing bags?

Need to use plastic bags do not have too much garbage bags, food bags, beverage bags, commodity bags, clothing bags, plastic bags are closely related to human, as long as you want, we can use plastic bags for packaging, plastic just different ingredients. Because plastic bags are convenient to carry and relatively low cost, they are well known to people.

Q:What are the packaging forms of fresh milk?

UHT milk, also known as UHT milk, is mainly made of composite plastic bags or paper plastic composite packaging, with pillow, brick and other forms. Because this material has good barrier properties, and can achieve the aseptic condition, filling in aseptic conditions, product shelf life of up to more than 30 days, with sales, storage, convenient carrying and drinking, long-distance transportation and other advantages, but the packaging of high cost, high price.

Q:Printing process of packaging bag

For the surface or irregular surface can be used heat transfer, adhesion is good, not easy to fade, but requires a transfer equipment.Screen printing belongs to orifice plate printing. It is called four printing methods together with flat, convex and gravure printing. Hole printing includes transcription, mesh flower version, stencil printing and screen printing etc.. Printing the principle is: (a version of the base paper or other version of the film version of the ink can be made through holes) at the time of printing, through a certain pressure so that the ink to the substrate through the hole hole Edition (transfer paper, ceramics etc.) on the formation of images or text.

Q:Why is the higher the elevation, the more food bags inflate? From a physical point of view

The higher the altitude, the less the atmosphere, the smaller the pressure, and the pressure in the food package is a fixed value. The reason for the swelling of food packaging bags is that the pressure inside the food bags is greater than the external pressure!

Q:What's the raw material of the cement packing bag?

The raw material is polypropylene resin cement packaging bags, mainly for foreign production of polyethylene (PE), mainly for the domestic production of polypropylene (PP), then add some additives, after the heating wire drawing, then weaving, printing and so on, the higher the quality of the cement bag inner lining!

Q:How are food bags made out?

The layout of printing: in food packaging printing machine is prepared with coated, and then printing according to the first layer material food company confirmed, as a food packaging bag is usually composed of three layers compounded. Printing requires printing only one layer of the surface. Printed with design renderings have no difference. Dongguan Yu packing is a nine color full automatic computer controlled printing press. The printing effect is comparable to that of the poster.

Q:What kind of packaging bag does polysilicon use?

Disposable material into a double-layer polyethylene bag, and then packing bags into the packing box or packaging barrel. Block polysilicon packaging specifications are net 5000g or 10000g per bag.