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Preparation method of oxygen-insulation heat-sealed aluminized film

An aluminized film and oxygen barrier technology, applied in the field of preparation of oxygen-insulated heat-sealed aluminized film, can solve the problems of easy infiltration of oxygen at the heat seal, low peel strength of aluminum film, poor oxygen barrier performance, etc., to reduce tearing Effects of dealumination rate, temperature reduction and toughness improvement

Inactive Publication Date: 2019-02-15
王敏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problems mainly solved by the present invention are aimed at the high temperature of the heat-sealing layer of the existing aluminum-coated film, poor toughness, low peeling strength of the aluminum film, and when the aluminum-coated film is applied to commodity packaging, the heat-sealed part is easy to infiltrate oxygen, and oxygen For defects with poor barrier properties, a method for preparing an oxygen-barrier heat-sealing aluminized film is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] In parts by weight, put 40 parts of LDPE masterbatch, 10 parts of EVA masterbatch, and 8 parts of dioctyl phthalate in a high-speed mixer at 4000r / min for 10min to obtain a blend. The mixture is placed in a co-rotating twin-screw extruder, the temperature of the die is controlled to 215℃, and the LDPE / EVA blended resin is obtained by melt blending and granulation, and then poured into the single-screw extrusion blown film machine to control the die The temperature is 230℃, and the core layer with a thickness of 30μm is blown; take 200g of gallic galls in a beaker, add 400mL of 40% sodium hydroxide solution to the beaker, heat the beaker to 70℃, and immerse Extract and hydrolyze for 40 minutes to obtain the hydrolyzed liquid. Adjust the pH of the hydrolyzed liquid to 6.8 with a mass fraction of 85% acetic acid solution, cool to room temperature naturally, and crystallize for 30 minutes to obtain a crystallization mixture. The crystallization mixture is placed in a high-spe...

example 2

[0028] In parts by weight, put 45 parts of LDPE masterbatch, 12 parts of EVA masterbatch, and 9 parts of dioctyl phthalate in a high-speed mixer at a rotation speed of 4100r / min for 11 minutes to obtain a blend. The mixture is placed in a co-rotating twin-screw extruder, the temperature of the die head is controlled to 217°C, and the LDPE / EVA blend resin is obtained by melt blending and granulation, and then poured into a single-screw extrusion blown film machine to control the die head The temperature is 240℃, and the core layer with a thickness of 32μm is blown; take 250g of gallic galls in a beaker, add 420mL 40% sodium hydroxide solution to the beaker, heat the beaker to 75℃, and soak in heat preservation Extract and hydrolyze for 45 minutes to obtain the hydrolyzed liquid. Adjust the pH of the hydrolyzed liquid to 7.0 with a mass fraction of 85% acetic acid solution, naturally cool to room temperature, and crystallize for 32 minutes to obtain a crystallization mixture. The ...

example 3

[0030] In parts by weight, put 50 parts of LDPE masterbatch, 15 parts of EVA masterbatch, and 10 parts of dioctyl phthalate in a high-speed mixer at a speed of 4200r / min for 12 minutes to obtain a blend. The mixture is placed in a co-rotating twin-screw extruder, the temperature of the die head is controlled to 220 ℃, and the LDPE / EVA blended resin is obtained by melt blending and granulation, and then poured into the single-screw extrusion blown film machine to control the die head The temperature is 250℃, and the core layer with a thickness of 35μm is blown; take 300g of gallic galls in a beaker, add 450mL of 40% sodium hydroxide solution to the beaker, heat the beaker to 80℃, and soak in heat preservation Extract and hydrolyze for 50 minutes to obtain the hydrolyzed liquid. Adjust the pH of the hydrolyzed liquid to 7.2 with a mass fraction of 85% acetic acid solution, cool to room temperature naturally, and crystallize for 35 minutes to obtain a crystallization mixture. The c...

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Abstract

The invention discloses a preparation method of an oxygen-insulation heat-sealed aluminized film, and belongs to the technical field of packaging films. According to the preparation method of the oxygen-insulation heat-sealed aluminized film, Chinese galls and sticklac are heated and melted in a mixed mode, grinding is conducted at the normal temperature, thus a solid oxygen-absorption binder is prepared, and the solid oxygen-absorption binder serving as an intermediate binding layer of an aluminized film heat-seal layer and a core layer can achieve great oxygen resisting and water vapor insulating effects; a biaxially-oriented polypropylene (BOPP) thin film serve as the heat-seal layer, double bonds in the BOPP thin film can be attacked by oxygen atoms to be subjected to a free radical chain reaction, oxides or superoxides are generated on the surface, making contact with air, of the heat-seal layer to prevent oxygen in the air from invading into a packaging material, and thus the oxygen content in the heat-sealed aluminized film is decreased; and in addition, after the core layer surface of an aluminized film base material is subjected to corona treatment, the surface is porous and is carbonized, pre-oxidized wires are attached to the core layer surface, thus the porous wire-coated surface is formed, the toughness of the aluminized film is improved, the temperature of the heat-seal layer is decreased, and wide application prospects are achieved.

Description

Technical field [0001] The invention discloses a method for preparing an oxygen-insulating heat-sealed aluminum plating film, which belongs to the technical field of packaging films. Background technique [0002] Aluminized film is a bright metal formed by evaporating high-purity aluminum wire at high temperature (110~1200℃) into gaseous state through vacuum aluminizing process, and then when the plastic film passes through the vacuum evaporation chamber, the gaseous aluminum atoms are deposited on the surface of the plastic film. Color film. Aluminized film is a composite flexible packaging material formed by coating an extremely thin layer of metal aluminum on the surface of a plastic film using a special process. The most commonly used processing method is vacuum aluminum plating, which is to pass high temperature under high vacuum The metal aluminum is melted and evaporated, and the aluminum vapor is deposited on the surface of the plastic film, so that the surface of the pl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D7/01
CPCB29D7/01
Inventor 王敏章红英王素香
Owner 王敏
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