Food sack type bag type many people know
food packaging bags, but the type of food packaging bag but not how to understand, to introduce the below the pocket common food packaging bags.
1, 3-side 3-side have two side seams and a top side seams bag, its bottom is formed by horizontal folding film.
This kind of bag can folding also can not, when have a white border, they can be upright standing on the shelf.
3-side a deformation is the original edge collapse to form the bottom edge, with bonding method, such, essentially becomes a four edge-sealing bag.
2, back sealing bag back sealing bag also called pillow bag, bag after, upper and lower seam, making them have pillow shape, many small food bags commonly used pillow bags to packaging.
Pillow bags seams formed after a fin shape, in this kind of structure, seal the membrane lining is put together, joint out from behind the encapsulated good bag.
Another sealing form overlap, sealing, one side of the inner layer and outer layer of adhesive, on the other side to form a flat seal.
Because 'fins' form sealing is strong, and as long as the lining of the packaging material is heat sealing, so widely used.
And 'overlap' form sealing is relatively strong, and bags of inside and outside layer of the heat sealing material, so not much use.
Is sealed top and bottom sealing bag lining material of adhesive.
3, folding bag folding bag also called for bags, organ bags, back is the deformation of the sealing bag is on the opposite side of the bag to fold into form M type.
If the asymmetry of M type, also known as the trapezoidal folding bag.
4, four edge-sealing bag edge-sealing is usually two kinds of material on the top, sides and bottom sealing, compared with the previously mentioned bag, may use two different kinds of plastic resin material, if they can each other adhesive, four edge-sealing bag made from the front of adhesive.
Four edge-sealing bag can be made into various shapes, such as heart-shaped or elliptic.
5, zipper bag on 3-side and body bags with easy to open the zipper bag.
Ok, this is the common food packaging bag type.
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