A kind of bag film in PE box and preparation method thereof

A bag-in-box and film cooling technology, which is applied in the field of flexible packaging, can solve problems such as food safety hazards, achieve good light protection and oxygen barrier performance, improve storage and transportation efficiency, and improve the effect of oxygen barrier capacity

Active Publication Date: 2022-01-18
福建富一锦科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The packaging plastic film exerts a synergistic effect through the compounding of raw materials, and has good tensile ability and water resistance, but contains polyamide wax powder, isoamyl 4-dimethylaminobenzoate, bisphenol A cyanate resin and other harmful substances Human body components, if used in bag-in-box film, contact with liquid food for a long time, there will be food safety hazards

Method used

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  • A kind of bag film in PE box and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation of bag-in-PE film includes the following steps:

[0025] Step 1: Weigh each raw material according to Table 1, mix each raw material according to the respective formulas of the outer layer and the inner layer, and obtain the outer layer mixture and the inner layer mixture respectively;

[0026] Step 2: Put the outer layer compound and the inner layer compound into the hopper of the extruder respectively. The temperature of the extruder is 160°C, and perform double-layer co-extrusion blown film processing to obtain a film, in which the thickness of the inner layer is 0.002mm , the thickness of the outer layer is 0.01mm;

[0027] Step 3: cooling and winding the film to obtain the PE bag-in-box film.

[0028] The tensile strength of the bag film in the prepared PE box is 46N / mm, the elongation at break is 282%, and the oxygen transmission rate (23°C, 50%RH) is 3.62cm 3 / m 2 ·24h·0.1Mpa, with good strength and sealing oxygen barrier effect.

[0029] Tabl...

Embodiment 2

[0032] To prepare the bag-in-PE film, see Table 1 for the amount of each raw material, and the method is the same as in Example 1, except that the temperature of the extruder in step 2 is 150°C, the thickness of the inner layer of the film is 0.002mm, and the thickness of the outer layer is 0.012mm.

[0033] The tensile strength of the bag film in the prepared PE box is 48N / mm, the elongation at break is 274%, and the oxygen transmission rate (23°C, 50%RH) is 3.75cm 3 / m 2 ·24h·0.1Mpa, with good strength and sealing oxygen barrier effect.

Embodiment 3

[0035] To prepare the bag-in-PE box film, see Table 1 for the amount of each raw material, and the method is the same as in Example 1, except that the temperature of the extruder in step 2 is 165°C.

[0036] The tensile strength of the bag film in the prepared PE box is 53N / mm, the elongation at break is 272%, and the oxygen transmission rate (23°C, 50%RH) is 3.70cm 3 / m 2 ·24h·0.1Mpa, with good strength and sealing oxygen barrier effect.

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Abstract

The invention relates to a PE box-in-bag film and a preparation method thereof. The PE box-in-bag film includes an inner layer and an outer layer, and the outer layer includes: 30-50 parts of low-density polyethylene, metallocene 40-60 parts of polyethylene, 5-15 parts of linear polyethylene; the inner layer comprises in parts by weight: 65-85 parts of low-density polyethylene, 15-35 parts of ethylene-vinyl alcohol copolymer; the inner layer and The thickness ratio of the outer layer is 1:3-6. The bag film in the PE box adopts an environmentally friendly formula, has good mechanical properties, is not easy to produce needle-punched micropores, has low oxygen transmission rate, and has good sealing performance. The preparation method adopts a conventional co-extrusion film blowing process, and the operation is simple and convenient, and it is easy to popularize and apply industrially.

Description

technical field [0001] The invention relates to the technical field of flexible packaging, in particular to a PE bag-in-box film and a preparation method thereof. Background technique [0002] The bag-in-box is usually composed of a flexible inner bag made of film, a sealing device and a carton. It is mostly used for packaging food such as fruit juice, wine, fruit juice drinks, mineral water, and edible oil. Among them, the inner bag made of film is used as Containers that directly carry food have a decisive impact on the packaging effect of food. [0003] Bag-in-box film, that is, the film material used in the inner bag of bag-in-box, in order to meet the performance requirements in the prior art, various processing aids are added, such as bisphenol A resin, which is easy to precipitate into liquid food In addition, it may disturb the metabolic process of the human body, affect the development of infants and the normal immune defense system of the human body. For example:...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/08B32B27/06B32B27/32B32B27/30B29C48/08B29C48/18B65D77/04B65D30/08B29L7/00B29L9/00
CPCB32B27/08B32B27/32B32B27/327B32B27/306B29C48/08B29C48/18B65D77/04B65D31/04B32B2439/70B32B2307/7244B32B2307/71B29L2007/00B29L2009/00
Inventor 黄作团黄家辉
Owner 福建富一锦科技有限公司
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