salty food packaging
DATE：2019/12/24 9:26:23 / READ： / SOURCE：This station
salty food packaging
Wei Food includes a variety of fried goods such as potato chips, corn flakes, popcorn, Wei nuts, pretzels and so on. Flexible packaging accounts for 75% of its packaging. The total requirements are as follows: first, there must be a good printing surface; second, in the case of a film, it must be transparent, but some are not needed, and third The packaging must have good grease resistance; Fourth, the thickness of the package must be large to fully bear the weight of the package; Fifth, some fast foods have sharp corners, and for this reason, they must have good needle stick resistance; Sixth, The top, bottom, and back seam heat seal must be reliable, waterproof, oil resistant, have good mechanical strength, easy to clean, and the package can adapt to the production of high-speed automatic forming filling-sealing machine. Low temperature heat seal is required. It will bend and bend due to heat. The heat seal should not leak even if the pressure inside the bag slightly exceeds the external pressure, and the seal is reliable. And it must be ensured that the food in the bag will not be broken or broken during transportation: Seventh, the seal should be re-closable, which can use children or other equipment, but this should increase cost reduction. Eighth, for a district production and The oxygen barrier is not very important in the packaging for sale, but it is very important for the products sold over a long distance. Aluminum foil or metallized PET or
of
BON: Ninth, the cost of packaging is 20% of the total product cost. For this reason, the pressure to reduce packaging costs in this market is very large: tenth, the size of fast food packaging specifications varies greatly, which affects packaging Material wall thickness and heat-sealing resin
Selection
Structure of packaging
The original salt food packaging was cardboard, paraffin-coated cellophane bags, which mainly had good grease resistance. In the 1950s, PVDC coated cellophane appeared with good transparency, moisture resistance and fast heat-sealability. At present, these materials have been replaced by plastics, mainly BOPP. The reason for the replacement is low cost, because the packaging cost of BOPP is only 60% of the cost of cellophane packaging, and cellophane is prone to wrinkle and brittleness at low temperatures. PVDC coated OPP film is the main material for salty food packaging. When barrier properties are very important in packaging, co-extruded composite packaging materials have replaced all the above-mentioned packaging materials. The reasons are: first, co-extrusion must be surface-printed, and most inks in history Scratches occur during friction with other surfaces during transport. Because the printing of fast food packaging is very gorgeous, the above problems are easy to occur. The solution is lamination so that the pattern is printed in the middle of the film. Second, cellophane, aluminum foil, metalized ones cannot be co-exposed, but they are still used for salt food. The main packaging materials, for which the following six structures are currently used; the first structure is OPP / adhesive / HDPE / heat seal layer, and the heat seal layer is ionic film, EVA or a blend of the two resins. Thing. Ionic films are more expensive than EVA. However, it has better heat sealability and better grease resistance. OPP provides reverse printing, transparency and strength, and the binder is polyurethane adhesive or water-soluble acrylate adhesive. The HDPE here is colored, such as: white or chocolate color, for this reason, this package has no transparency. The second structure is an OPP / adhesive / cellophane / PVDC structure. PVDC is used as a heat-sealing resin and a moisture-proof layer. Cellophane has good toughness, transparency, and resistance to bending. The OPP layer can be reverse-printed. The third kind of scab is co-extrusion of PP + 3% PE copolymer or co-extrusion PP-PE-polybutene terpolymer and PVDC inner sealing layer on the OPP layer. The inner sealing layer can also be acrylic polymer. Polymer, ethylene-propylene copolymer or ionic resin. The fourth structure is: OPP / binder or extruded PE / metallized OPP / heat seal layer, wherein the heat seal layer is an ethylene propylene copolymer or an ethylene propylene-butene terpolymer. The fifth structure is the simplest and is widely used in Europe for food packaging.
Wei Food includes a variety of fried goods such as potato chips, corn flakes, popcorn, Wei nuts, pretzels and so on. Flexible packaging accounts for 75% of its packaging. The total requirements are as follows: first, there must be a good printing surface; second, in the case of a film, it must be transparent, but some are not needed, and third The packaging must have good grease resistance; Fourth, the thickness of the package must be large to fully bear the weight of the package; Fifth, some fast foods have sharp corners, and for this reason, they must have good needle stick resistance; Sixth, The top, bottom, and back seam heat seal must be reliable, waterproof, oil resistant, have good mechanical strength, easy to clean, and the package can adapt to the production of high-speed automatic forming filling-sealing machine. Low temperature heat seal is required. It will bend and bend due to heat. The heat seal should not leak even if the pressure inside the bag slightly exceeds the external pressure, and the seal is reliable. And it must be ensured that the food in the bag will not be broken or broken during transportation: Seventh, the seal should be re-closable, which can use children or other equipment, but this should increase cost reduction. Eighth, for a district production and The oxygen barrier is not very important in the packaging for sale, but it is very important for the products sold over a long distance. Aluminum foil or metallized PET or
of
BON: Ninth, the cost of packaging is 20% of the total product cost. For this reason, the pressure to reduce packaging costs in this market is very large: tenth, the size of fast food packaging specifications varies greatly, which affects packaging Material wall thickness and heat-sealing resin
Selection
Structure of packaging
The original salt food packaging was cardboard, paraffin-coated cellophane bags, which mainly had good grease resistance. In the 1950s, PVDC coated cellophane appeared with good transparency, moisture resistance and fast heat-sealability. At present, these materials have been replaced by plastics, mainly BOPP. The reason for the replacement is low cost, because the packaging cost of BOPP is only 60% of the cost of cellophane packaging, and cellophane is prone to wrinkle and brittleness at low temperatures. PVDC coated OPP film is the main material for salty food packaging. When barrier properties are very important in packaging, co-extruded composite packaging materials have replaced all the above-mentioned packaging materials. The reasons are: first, co-extrusion must be surface-printed, and most inks in history Scratches occur during friction with other surfaces during transport. Because the printing of fast food packaging is very gorgeous, the above problems are easy to occur. The solution is lamination so that the pattern is printed in the middle of the film. Second, cellophane, aluminum foil, metalized ones cannot be co-exposed, but they are still used for salt food. The main packaging materials, for which the following six structures are currently used; the first structure is OPP / adhesive / HDPE / heat seal layer, and the heat seal layer is ionic film, EVA or a blend of the two resins. Thing. Ionic films are more expensive than EVA. However, it has better heat sealability and better grease resistance. OPP provides reverse printing, transparency and strength, and the binder is polyurethane adhesive or water-soluble acrylate adhesive. The HDPE here is colored, such as: white or chocolate color, for this reason, this package has no transparency. The second structure is an OPP / adhesive / cellophane / PVDC structure. PVDC is used as a heat-sealing resin and a moisture-proof layer. Cellophane has good toughness, transparency, and resistance to bending. The OPP layer can be reverse-printed. The third kind of scab is co-extrusion of PP + 3% PE copolymer or co-extrusion PP-PE-polybutene terpolymer and PVDC inner sealing layer on the OPP layer. The inner sealing layer can also be acrylic polymer. Polymer, ethylene-propylene copolymer or ionic resin. The fourth structure is: OPP / binder or extruded PE / metallized OPP / heat seal layer, wherein the heat seal layer is an ethylene propylene copolymer or an ethylene propylene-butene terpolymer. The fifth structure is the simplest and is widely used in Europe for food packaging.
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