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Flexible packaging material with oxygen adsorption function based on natural gallic acid, preparation method for the packaging material and application of the packaging material

A gallic acid and flexible packaging technology, applied in the field of packaging materials, can solve the problems of small contact area, low oxygen absorption efficiency, accidental ingestion, etc., and achieve the effects of increasing the contact area, assisting in regulating the oxygen absorption reaction rate, and improving the oxygen absorption efficiency.

Active Publication Date: 2013-11-27
大家智合(北京)网络科技股份有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, gallic acid (catechol) and its derivatives are used as oxygen absorbers, mainly in the form of an inner package, which is sealed in a small air-permeable bag, and sealed in the outer packaging bag together with the food; In addition to the disadvantages of possible ingestion, the oxygen absorption efficiency is not high due to the small contact area with the gas inside the package

Method used

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  • Flexible packaging material with oxygen adsorption function based on natural gallic acid, preparation method for the packaging material and application of the packaging material
  • Flexible packaging material with oxygen adsorption function based on natural gallic acid, preparation method for the packaging material and application of the packaging material
  • Flexible packaging material with oxygen adsorption function based on natural gallic acid, preparation method for the packaging material and application of the packaging material

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Embodiment Construction

[0021] The present invention will be further described through the following specific embodiments and application examples. The following specific descriptions are for the convenience of understanding the present invention, and are not intended to limit the protection scope of the present invention.

[0022] 1 raw material

[0023] Commodity KBOPP film; LD100AC type LDPE resin; F280 type polypropylene resin; 18-0.3 type EVA resin; EVA emulsion type BJ707, solid content 55%; polyurethane adhesive; polyacrylic acid type adhesive.

[0024] 1 Preparation of food contact layer (inner layer)

[0025] The composition of the food contact layer of the oxygen-absorbing film is shown in Table 1; EVA and polyethylene (or polypropylene) resins are mixed mechanically, and then melt-blended on a twin-screw extruder at 145-180°C (see Table 2 for polyethylene), Then it is prepared into modified polyethylene or polypropylene film. For polypropylene resin processing at 170-210°C.

[0026] Ta...

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Abstract

The invention discloses a flexible packaging material with an oxygen adsorption function based on natural gallic acid, a preparation method for the packaging material and an application of the packaging material, and belongs to the technical field of packaging materials. The flexible packaging material comprises at least four functional structure layers. The outmost layer is an oxygen blocking layer. An oxygen adsorption layer, which comprises the gallic acid and a polyurethane binder, is below the oxygen blocking layer. An activation layer (catalyst layer), which comprises sodium carbonate and EVA resin, is below the oxygen adsorption layer. The innermost layer, below the activation layer, is a food contacting layer and also an oxygen permeating layer. On contacting water vapor, oxygen adsorption film prepared by the method starts the oxygen adsorption function and slowly generates an inert gas carbon dioxide at the same time. The packaging material is particularly suitable for storage and fresh-keeping of beer, fruit juice and sodas, and is capable of avoiding oxidization of nutritional ingredients of oxygen sensitive food and beverage, improving food quality and prolonging the shelf life.

Description

technical field [0001] The invention relates to a multilayer composite oxygen-absorbing film for food packaging and a preparation method thereof. More specifically, the application relates to a binder layer comprising gallic acid as an oxygen absorbing active ingredient, sodium carbonate as an activation layer, a high oxygen barrier KBOPP film as an outer layer, and a LDPE modified film as an inner layer, The invention relates to a composite film with an oxygen absorption function prepared by a dry composite method, which belongs to the technical field of packaging materials. Background technique [0002] Oxygen is one of the main factors causing food deterioration. For foods that are very sensitive to oxygen, such as beer, juice, milk, canned food, and cooked meat, high-barrier packaging materials are required for packaging; traditional high-barrier packaging, such as glass bottles, although It has good preservation effect on beer, fruit juice and canned food, but the tran...

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Application Information

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IPC IPC(8): B32B27/08B32B27/18B32B7/12B32B33/00B32B37/15B32B37/02B32B37/12B65D65/40
Inventor 李东立许文才付亚波曹国荣廖瑞娟王雅珺
Owner 大家智合(北京)网络科技股份有限公司
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