High-strength corrosion-resistant co-extruded film and preparation method thereof

A corrosion-resistant, co-extruded film technology, applied in the field of feeding bags, can solve the problems of easy leakage, easy corrosion of chemicals, low film strength, etc., and achieve the effects of improved acid, alkali and salt corrosion resistance, convenient control, and simple operation

Active Publication Date: 2021-11-26
东莞市博晨塑料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing medicinal powder bottle-shaped feeding bag is used instead, which overcomes the disadvantages of the traditional feeding method, but there are new technical problems in the bag body: the strength of the film layer is low, the drug is easy to corrode, easy to leak, etc.

Method used

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  • High-strength corrosion-resistant co-extruded film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] like figure 1 As shown, a high-strength corrosion-resistant co-extruded film includes a first PA barrier layer 1, an EVOH barrier layer 2, a second PA barrier layer 3, an adhesive layer 4, a first PP corrosion-resistant layer 5, and a second PA barrier layer arranged in sequence. Two PP corrosion-resistant layers 6 and PP sealing layers 7.

[0035] The raw material of the first PA barrier layer 1 and the raw material of the second PA barrier layer 3 are both made of a melting temperature of 230°C and a density of 1.13g / cm 3 nylon.

[0036] The EVOH barrier layer 2 is made of raw materials with an ethylene content of 35wt% and a density of 1.14g / cm 3 ethylene-vinyl alcohol copolymers.

[0037] The raw material of the adhesive layer 4 is formed by mixing the copolymerized PP carrier and the adhesive resin TIE at a weight ratio of 5:1.

[0038] The copolymerized PP carrier adopts a density of 0.92g / cm 3 , and a copolymerized polypropylene having a melt flow rate of 11...

Embodiment 2

[0050] A high-strength corrosion-resistant co-extruded film, including a first PA barrier layer, an EVOH barrier layer, a second PA barrier layer, an adhesive layer, a first PP corrosion-resistant layer, a second PP corrosion-resistant layer and a PP seal that are arranged in sequence Floor.

[0051] The raw material of the first PA barrier layer and the raw material of the second PA barrier layer are both made of a melting temperature of 220°C and a density of 1.08g / cm 3 nylon.

[0052] The EVOH barrier layer is made of raw materials with an ethylene content of 30wt% and a density of 1.10g / cm 3 ethylene-vinyl alcohol copolymers.

[0053] The raw material of the adhesive layer is formed by mixing the copolymerized PP carrier and the adhesive resin TIE in a weight ratio of 4:1.

[0054] The copolymerized PP carrier adopts a density of 0.90g / cm 3 , and a copolymerized polypropylene having a melt flow rate of 8 g / 10 min at 230° C. / 2.16 kg load.

[0055] The adhesive resin TI...

Embodiment 3

[0066] A high-strength corrosion-resistant co-extruded film, including a first PA barrier layer, an EVOH barrier layer, a second PA barrier layer, an adhesive layer, a first PP corrosion-resistant layer, a second PP corrosion-resistant layer and a PP seal that are arranged in sequence Floor.

[0067] Both the raw material of the first PA barrier layer and the raw material of the second PA barrier layer adopt a melting temperature of 250°C and a density of 1.18g / cm 3 nylon.

[0068] The raw material of the EVOH barrier layer adopts the ethylene content as 40wt%, density is 1.19g / cm 3 ethylene-vinyl alcohol copolymers.

[0069] The raw material of the adhesive layer is formed by mixing the copolymerized PP carrier and the adhesive resin TIE at a weight ratio of 6:1.

[0070] The copolymerized PP carrier adopts a density of 0.93g / cm 3 , and a copolymerized polypropylene having a melt flow rate of 15 g / 10 min at 230° C. / 2.16 kg load.

[0071] The adhesive resin TIE is maleic ...

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Abstract

The invention relates to the technical field of feeding bags, in particular to a high-strength corrosion-resistant co-extruded film and a preparation method thereof. The high-strength corrosion-resistant co-extruded film comprises a first PA barrier layer, an EVOH barrier layer, a second PA barrier layer, a bonding layer, a first PP corrosion-resistant layer, a second PP corrosion-resistant layer and a PP sealing layer, which are sequentially arranged; and the barrier property, the acid, alkali and salt corrosion resistance and the strength of the co-extruded film are improved. When the co-extruded film is applied to a powder feeding bag, PP has a corrosion-resistant effect and is made of a thermoplastic material, and the PP sealing layers between the two co-extrusion films abut against each other and are subjected to hot-pressing sealing, so that the corrosion of medicaments is prevented, and the leakproof sealing performance can be improved.

Description

technical field [0001] The invention relates to the technical field of feeding bags, in particular to a high-strength corrosion-resistant co-extruded film and a preparation method thereof. Background technique [0002] my country is a big producer of APIs and is also the manufacturing center of APIs in the world. An important process link in the production of APIs is chemical synthesis, and an important step in the chemical synthesis process is adding reaction materials to the reaction tank. The traditional method of adding materials is: use open bags to pack raw and auxiliary materials, then open the packaging bag in the area in front of the reaction tank and pour the materials directly or use a small shovel into the reaction tank; but this method has many disadvantages. The existing use of medicinal powder bottle-shaped feeding bags has overcome the disadvantages of the traditional feeding method, but there are new technical problems in the bags: the strength of the film l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/34B32B27/08B32B27/30B32B27/32B32B7/12B32B27/06B29C48/00
CPCB32B27/34B32B27/08B32B27/306B32B27/32B32B7/12B29C48/0018B32B2307/714B32B2307/50
Inventor 李洪河
Owner 东莞市博晨塑料科技有限公司
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