10KG Plastic Laminated Kraft Paper Valve Bag For Cement

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10/20/30KG Plastic Laminated Kraft Paper Valve Bag For Cement :

Q: What is the material of detergent bag?: Polyethylene (polyethylene, referred to as PE) is a thermoplastic resin made by polymerization of ethylene. Industrially, it also includes copolymers of ethylene with a small amount of alpha olefins. Polyethylene is odorless, non-toxic, feel like wax, has excellent resistance to low temperature performance (minimum temperature up to -100~-70 degrees C), good chemical stability, erosion resistance to most acid-base (not resistant to oxidizing acid). At room temperature, insoluble in general solvents, low water absorption, good electrical insulation.

Q: What kind of material is the urea packing bag made of?: The main material of urea woven bags consists of polypropylene and polyethylene.

Q: The vacuum packing bag is sealed. How can I open the zipper?: You can pull the zipper tail, the zipper straightened, and then repeatedly from the bottom up, check whether smooth, if not smooth, often because the zipper stuck in other things, so it is not smooth, only need to remove obstacles, you will be back to normal.

Q: Three layer coextrusion material for packaging bags: Five layer co extruded films composed of outer layer of multi ester copolymer, high mechanical strength, the second layer is ethylene methacrylate polymer, the third layer is the fourth layer of polyethylene, polyethylene, the inner layer is modified with ethylene propylene polymer. Five layer co extruded films performance of each layer as outer layer: providing excellent heat sealing and protection, good printing performance; the second layer is connected with the outer layer and third layer; third layer: providing vapor barrier and softness; fourth layer: connection layer and the third layer; inner layer: non-toxic, with compatibility infusion product good, excellent heat sealing and buffering external impact.

Q: What are the soft and hard sides of plastic bags? Material or process technology?: On the basic price will be a little higher, the brittle is generally PP or PET is done, some relatively low grade. Soft is generally made of multi-layer coextrusion film, barrier, and feel good. This soft about 27000 yuan / ton, while the PP film generally as long as 17000 yuan / ton, ten thousand tons a difference.

Q: Printing process of packaging bag: If it is cut into pieces, use a special press for packing bags or screen printing.Screen printing, screen opened relatively simple, but the requirements of the substrate surface is relatively smooth, simple process, relatively low cost, but the adhesion of the ink requirements are relatively high.

Q: Why are some teas not vacuum packed?: Feng Xing packaging machinery factory experts explained that the main role of vacuum packaging machine is oxygen, moisture, high temperature fermentation, etc., in order to prevent the deterioration of tea. The principle is relatively simple, which is conducive to vacuum packaging machine to remove the air in the packaging bag, and then sealed, so that tea in a vacuum under the state, and absolutely isolated from the outside world.

Q: Printing solvent for food packing bag: Use a moisture indicator to determine the content in the solvent. The water indicator is put into the solvent, and the water content varies with different colors. Depending on the color change, the amount of water in the solvent can be roughly determined.

Q: Can the meat with plastic packing bag be pressed directly with a pressure cooker?: The plastic composite film (bag) products used in food packaging have 8 national and trade standards, and the main standards are divided into physical and mechanical performance indexes and sanitary performance indexes. The indexes of physical and mechanical properties are mainly tensile strength (or tensile strength), elongation, peel strength, heat resistance strength, Charpy impact energy, water vapor permeation amount and the amount of oxygen through the bag, bag, pressure resistance, heat resistance and dielectric performance drop, oil resistance, cold resistance, heat resistance etc.;

Q: What can be easily removed from the words printed on plastic bags?: Dyes can be classified according to their purpose, state, or origin. Remove the upper part of the plastic bag from the fuel. Refer to

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