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Preparation method for oxygen barrier composite layer grain packing bag

A technology of packaging bags and composite layers is applied in the field of preparation of oxygen-barrier composite layer grain packaging bags, and can solve the problems of high cost, unsuitability of large-scale promotion of grain packaging bags, loss and the like.

Inactive Publication Date: 2012-06-27
安吉振兴布业有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention has good sealing performance and mildew resistance, but when it is used for packaging grain, the sealing strength is not high, and it may come off and cause losses; in addition, one of the bag body materials of this kind of packaging bag is aluminum foil, and the cost is relatively high. It is not suitable for mass promotion as a grain packaging bag

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] To prepare the anti-mildew packaging bag for peanuts, the composite water-locking layer is prefabricated first, then unrolled simultaneously with the protective layer and the oxygen barrier layer, and laminated in the order of the protective layer, the oxygen barrier layer and the composite water-locking layer, and then thermally compounded, cut, Sewn into bags, heat-sealed and sealed to make a peanut mildew-proof packaging bag with a length of 1070 mm, a width of 740 mm and a capacity of 50 kg. The specific process parameters are: (1) Preparation of the bag blank: (1) The surface density of the protective layer is 100g / m2 , The conventional anti-aging polypropylene spun-bonded non-woven fabric with a longitudinal and transverse breaking strength of 1050N / 5cm; 3 / m 2 24hr polypropylene / ethylene-vinyl acetate / polyethylene three-layer composite oxygen-barrier film; (3) the specific process of its prefabricated composite water-locking layer: (a) film layer and moisture-abs...

Embodiment 2

[0063] To prepare wheat mildew-proof packaging bags, first prefabricate the composite water-locking layer, then unwind the roll together with the protective layer and the oxygen-barrier layer, and stack them in the order of the protective layer, oxygen-barrier layer and composite water-locking layer, and then thermally compound, cut, Sewn into bags, heat-sealed and edge-sealed to make a wheat mildew-proof packaging bag with a length of 900mm, a width of 580mm, and a capacity of 50kg. The specific process parameters are: (1) Preparation of the bag blank: (1) The surface density of the protective layer is 100g / m 2 , The conventional anti-aging polypropylene spun-bonded non-woven fabric with a longitudinal and transverse breaking strength of 1050N / 5cm; 3 / m 2 ·24hr polypropylene / vinylidene chloride / polyethylene three-layer composite oxygen barrier membrane. (3) The specific process of prefabricating the composite water-locking layer: (a) Preparation of the film layer and the mo...

Embodiment 3

[0065] To prepare rice mildew-proof packaging bags, first prefabricate the composite water-locking layer, then unwind the roll together with the protective layer and the oxygen-barrier layer, and stack them in the order of the protective layer, oxygen-barrier layer and composite water-locking layer, and then thermally compound, cut, Sewn into bags, heat-sealed and edge-sealed to make a rice mildew-proof packaging bag with a length of 1070mm, a width of 740mm, and a capacity of 100kg. The specific process parameters are: (1) Preparation of the bag blank: (1) The surface density of the protective layer is 120g / m 2 , The conventional anti-aging polypropylene split silk woven fabric with a longitudinal and transverse breaking strength of 1250N / 5cm; 3 / m 2 24hr polypropylene / ethylene-vinyl acetate / polyethylene three-layer composite oxygen-barrier film; (3) the specific process of its prefabricated composite water-locking layer: (a) film layer and moisture-absorbing layer fiber web...

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Abstract

The invention relates to a preparation method for an oxygen barrier composite layer grain packing bag. The preparation method is characterized by comprising the following steps of: adopting anti-aging polypropylene materials as a protection layer; adopting a three-layer composite oxygen barrier film consisting of polypropylene / ethylene-vinyl acetate / polyethylene or polypropylene / partial chloroethylene / and polyethylene as an oxygen barrier layer; mixing linen with ES fiber according to different proportions; preparing two layers of fiber webs of a film sticking layer and a moisture absorption layer respectively by a nonwoven technology; combining the fiber webs into a whole body through a needling layer; overlapping a non-hydrophilic ES fabric web formed by the nonwoven technology on themoisture absorption layer; preparing a composite water locking layer by needling again, wherein the three layers of materials are the protection layer, the oxygen barrier layer and the composite water locking layer sequentially from top down; preparing a material of a bag body through thermal compound; and preparing the grain packing bag by cutting, suturing, hot pressing and sealing. According to the method, the conventional production equipment can be used, the process is simple, the production cost is low, the mold and toxin are prevented from being bred in grains in the bag by regulating the proportion of the materials of all the layers and in the layers, and various requirements of storage, transportation and mold resistance are met.

Description

technical field [0001] The invention relates to a preparation method of a grain packaging bag, in particular to a preparation method of an oxygen barrier composite layer grain packaging bag. The prepared grain packaging bag has high strength and excellent hygroscopicity and oxygen barrier properties, and is suitable for packaging Store and transport grains that are prone to mold. Background technique [0002] my country's traditional grain packaging bags use natural plants, namely jute, as raw materials. The raw hemp needs to be degummed, treated with compound enzymes, reduced and bleached, and then cleaned, oiled, dehydrated, and dried before it can be made to remove color and impurities. The jute fiber is used, and then the tubular braid is made by weaving method and weaving technology, and finally the tubular bag with a large number of small holes is cut and sewn. The grain packaging bag has the characteristics of high strength and durability. At the same time, because my...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B31B1/64B31B1/68B31B1/14B31B1/74B65D30/02B32B27/02B32B27/12B32B27/32B32B27/08B32B27/30B31B50/64B31B50/68
Inventor 汪育松殷保璞王超洋黄潇玲张磊王荣武黄健华
Owner 安吉振兴布业有限公司
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