Food packaging bag type classification

Food packaging bag type classification; Three edge-sealing bag edge-sealing bag, there are two side seams and a top side seams bag, its bottom is formed by horizontal folding film. This bag can be folded edge can also have no, when he has ruffled, they can be upright standing on the shelf. Three edge-sealing bag 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 seal bags also called pillow bags, bags have 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 seal bag, 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 for 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 bag is usually two ( Volume) Made from the top, sides and bottom sealing material, 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. 6. There are many different kinds of 3 d bag bag, basically have the following types: (1) and bottom boat shape of the bag. (2) fold the bottom integration three-dimensional bag. (3) a slant stereo bag heat sealing. (4) bottle shape cutting die three-dimensional bag. (5) with three-dimensional bag mouth, divide again for oblique mouth 3 d bag and roof cover bag. 6. Pneumatic upright bags. 7. Special-shaped bag of fruit shape shapes of block, cartoon pocket. 8. Bag with carrying hole hole form a triangle, butterfly, plane shape, round hole, semicircle, drum-shaped, etc.