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High-temperature steaming resistant composite packaging bag and preparation method thereof

A composite packaging bag and high temperature resistant technology, which is applied in the field of packaging film, can solve the problems of high cost, unfavorable aluminum plating, large investment in coating equipment, etc., and achieve the effects of avoiding various restrictions, reducing production processes and improving production efficiency

Inactive Publication Date: 2020-08-28
合肥佛斯德新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After corona treatment of PET film, its corona effect on the surface degrades seriously with time and environmental conditions, which is unfavorable for subsequent aluminum plating. The online coating method is feasible, but there are still several problems in practical application: (1) coating The bonding strength between the cloth resin and the base film is insufficient or uneven, and there is a problem of desorption; (2) the coating resin is highly targeted, and there is no general coating resin when the polyester film is combined with different substrates. Strong application specificity; (3) Large investment in coating equipment and difficult maintenance
(4) On-line coating must have a coating resin pre-synthesis problem. At present, there is no industrialized coating resin in China. It can only rely on imports, and the cost is very high. Even if the production technology of coating resin is introduced, due to the production of coating resin The process is very complicated and the quality control is difficult, so the production technology is very difficult
Especially after high-temperature cooking or food sterilization process, it is easy to delaminate, foam, deform and leak between layers, causing product deterioration

Method used

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  • High-temperature steaming resistant composite packaging bag and preparation method thereof

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Effect test

preparation example Construction

[0025] The present invention also provides a preparation method of a high-temperature cooking-resistant composite packaging bag, the preparation method comprising the following steps:

[0026] The polyester resin layer of the base film layer and the raw materials used for the surface layer are weighed according to the formula, and after being dried and mixed by a mixing device, they are melted and mixed by a twin-screw extruder, and then pressurized by a melt pump to the die for co-extrusion Casting on a large cold drum to cool the cast sheet, fully preheating the obtained cast sheet, stretching longitudinally and transversely respectively, heat setting at 225-240°C, cooling at 60-70°C to obtain the base film layer;

[0027] The heat-sealing layer is compounded on the base film layer through an adhesive, and the composite packaging bag is obtained after being cured and shaped.

Embodiment 1

[0030] A composite packaging bag, comprising a base film layer and a heat-sealing layer compounded on one side of the base film layer through an adhesive; wherein, the base film layer is a three-layer co-extrusion structure, including a polyester resin layer and a surface layers disposed on both sides of the polyester resin layer;

[0031] Described polyester resin layer is PET chips (intrinsic viscosity 0.68dL / g);

[0032] The surface layer includes the following raw materials in parts by weight: 100 parts by weight of PET chips (intrinsic viscosity 0.68dL / g), 35 parts by weight of MAH-g-PE (grafting rate 1.5%), hydrolysis stabilizer epoxy fatty acid alkyl ester 8 parts by weight, polyaryloxyphosphazene fiber ([NP(OC 6 h 4 ) 2 ] n, diameter is 0.3μm, length is 1.2μm) 25 parts by weight, inorganic particle silica (particle size is 0.3 μm) 10 parts by weight, chain extender polycarbodiimide 3 parts by weight, nucleating agent MIllad3988 3 parts by weight , Dispersant polye...

Embodiment 2

[0037] The structure and preparation method of the composite packaging bag in this embodiment are basically the same as in Example 1, the difference is that

[0038] The surface layer includes the following raw materials in parts by weight: 100 parts by weight of PET chip (intrinsic viscosity 0.68dL / g), 25 parts by weight of MAH-g-PE (grafting rate 1.5%), hydrolysis stabilizer epoxy fatty acid alkyl ester 3 parts by weight, polyaryloxyphosphazene fiber ([NP(OC 6 h 4 ) 2 ] n , diameter is 0.3μm, length is 1.2μm) 15 parts by weight, inorganic particle silica (particle size is 0.3 μm) 5 parts by weight, chain extender polycarbodiimide 2 parts by weight, nucleating agent MIllad3988 2 parts by weight , Dispersant polyethylene glycol-20000 2 parts by weight.

[0039] The rest remain unchanged, and the composite packaging bag is prepared.

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Abstract

The invention belongs to the technical field of packaging films, and particularly relates to a high-temperature steaming resistant composite packaging bag and a preparation method thereof. The composite packaging bag comprises a base film layer and a heat sealing layer compounded on one side of the base film layer through an adhesive; the base film layer is of a three-layer co-extrusion structureand comprises a polyester resin layer and surface layers arranged on the two sides of the polyester resin layer, and the surface layers comprise polyester resin, toughening resin, a hydrolysis stabilizer, polyaryloxy phosphazene fibers, inorganic particles, a chain extender, a nucleating agent and a dispersing agent; compared with a traditional BOPET / aluminized layer / adhesive layer / heat sealing layer (CPP) structure, an aluminized layer is omitted, and a structure with excellent barrier and weather resistance is compounded on the surface layer of BOPET by adopting a melt co-extrusion method sothat not only is the manufacturing process of the existing steaming-resistant packaging bag reduced, but also various limitations in the aluminizing process can be avoided, the manufacturing efficiency of the steaming-resistant packaging bag is improved, and the cost is indirectly reduced.

Description

technical field [0001] The invention belongs to the technical field of packaging films, in particular to a high-temperature cooking-resistant composite packaging bag and a preparation method thereof. Background technique [0002] High temperature resistant retort food packaging bags, commonly known as soft cans, are commonly used for the storage of food at room temperature. They are often used in the packaging of meat, soybean products and other foods. Store at room temperature. Retort-resistant packaged food is easy to carry, ready to eat after opening the bag, hygienic and convenient, and can well maintain the flavor of the food, so it is deeply loved by consumers. According to different sterilization processes and packaging materials, the shelf life of retort-resistant packaging products ranges from half a year to two years. [0003] At present, the structure of the more common soft cans is BOPET / aluminized layer / adhesive layer / heat seal layer (CPP), and it is necessary...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/06B32B27/08B32B27/18B32B27/32B32B27/36B32B7/12B32B1/00B32B37/12B29D7/01C08L67/02C08L51/06C08L85/02C08L79/00C08L71/02C08K3/36C08J5/18B65D30/02B65D30/08B65D81/34
CPCB32B27/08B32B27/18B32B27/32B32B27/36B32B7/12B32B1/00B32B37/12B29D7/01C08J5/18B65D31/00B65D31/04B65D81/3438B65D81/3415B32B2250/24B32B2262/02B32B2264/102B32B2264/104B32B2264/12B32B2270/00B32B2307/306B32B2307/31B32B2307/712B32B2307/54B32B2439/46B32B2439/70C08J2367/02C08J2451/06C08J2485/02C08K3/36
Inventor 茆贵云
Owner 合肥佛斯德新材料科技有限公司
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