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Ethylene-vinyl alcohol (EVOH) copolymer packaging material for tomato products

A technology of vinyl alcohol copolymers and tomato products, which is applied in packaging, wrapping paper, hollow objects, etc., can solve the problems of undiscovered improvement technology disclosure, and achieve the effect of ensuring tomato food quality, safe storage, and taking into account manufacturing costs

Inactive Publication Date: 2012-02-01
陈其钢
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In addition, there is no relevant improvement technology disclosed in the relevant technical solutions to solve the above shortcomings disclosed in the Chinese patent application.

Method used

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  • Ethylene-vinyl alcohol (EVOH) copolymer packaging material for tomato products
  • Ethylene-vinyl alcohol (EVOH) copolymer packaging material for tomato products

Examples

Experimental program
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Embodiment 1

[0008] Embodiment 1: In parts by weight, with 83%-89% of polyethylene resin or polypropylene resin and 3%-7% of ethylene and vinyl alcohol copolymer, respectively uniformly stirred and kept dry; the aforementioned raw materials after homogenization and 8 %-10% binders are respectively added to the molding machine trough to raise the temperature. After the temperature is 170-200°C, the two sides of the ethylene-vinyl alcohol copolymer are used as the intermediate material to compound polyethylene resin or polypropylene resin with the binder. Five layers of composite.

[0009] The binder is an acid-modified polyolefin.

[0010] When adopting the embodiment of the present invention to make packaging bottles, the molding process is to form the material tube by screw extrusion, and the material tube of the blow molding machine is blown into a molded bottle shape under a pressure of 0.7 MPa, and the mold is cooled to 30-20 °C by circulating water. Cool to 45-35°C, remove the leftov...

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Abstract

The invention relates to an ethylene-vinyl alcohol (EVOH) copolymer packaging material for tomato products, which is prepared by a method comprising the steps of: respectively evenly stirring 83%-89% of polyvinyl resin or polypropylene resin and 3%-7% of EVOH copolymer which are metered in part by weight, and maintaining the stirred material to be dry; after homogenizing, respectively adding the stirred material and 8%-10% of adhesive into a molding mechanical material groove, and heating up at the temperature of 170-200 DEG C; and finally, taking the EVOH copolymer as intermediate materials, and respectively compounding the polyvinyl resin or the polypropylene resin by the adhesive at the two sides of the EVOH copolymer for five-layer compounding. After the inside and outside five-layer compounding structure is adopted, the good insulation performance of the EVOH copolymer is fully exerted, and both the manufacturing cost and the shelf-life performance of the food are considered; furthermore, the EVOH copolymer packaging material for the tomato products is molded in a way of co-extrusion, so that the packaging material is convenient, practical and low in manufacturing cost, the quality of the tomato food is effectively guaranteed within the quality guarantee period, and the requirement of secure storage can be reached.

Description

Technical field: [0001] The invention belongs to a packaging material for tomato food containing ethylene and vinyl alcohol copolymer, in particular to a packaging material for tomato products of ethylene and vinyl alcohol copolymer. Background technique: [0002] At present, tomato food is widely used in synthetic material packaging, such as tomato sauce, etc., using plastic bottles, stand-up pouches, hoses, etc. It is prone to oxidative browning and other problems that cannot block the outside air. For example, there are small gaps in the single-layer PE plastic layer, and oxygen and other gases in the air can permeate through. PE with a density of 0.92d is 50 μm thick, and the oxygen transmission rate at 35 ° C is 3900 , the carbon dioxide permeation rate is 45,000; PP50μm thick, the oxygen permeation rate at 25°C is 29,900, and the carbon dioxide permeation rate at 35°C is 17,900; and the single-layer EVOH plastic layer has a compact structure, excellent barrier performa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D65/40B65D85/00C08L23/06C08L23/12C08L23/08C08L29/02B29D22/00B32B27/08B32B27/28
Inventor 陈其钢
Owner 陈其钢
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