Transparent milk packaging film and preparation method thereof

A technology for packaging film and milk, applied in packaging, wrapping paper, household packaging, etc., can solve problems such as dissolution of small molecules, and achieve the effect of reducing oxidized food, easy to blow film, and good compatibility

Active Publication Date: 2019-08-23
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 inner film in this solution is a black and white polyethylene film, and there is

Method used

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  • Transparent milk packaging film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation of transparent milk packaging film comprises the following steps:

[0029] Step 1: Weigh each raw material according to Table 1, mix each raw material according to the respective formulas of the inner layer, core layer and surface layer, and obtain the inner layer mixture, the core layer mixture and the surface layer mixture respectively;

[0030] Step 2: Add the inner layer compound, the core layer compound and the surface layer compound into the three hoppers of the extruder respectively, and perform three-layer co-extrusion blown film processing, wherein the temperature of the extruder is 150°C to obtain a film. The thickness is 0.05mm, of which the inner layer is 0.01mm, the core layer is 0.03mm, and the surface layer is 0.01mm;

[0031] Step 3: cooling and winding the film to obtain a transparent milk packaging film.

[0032] The transparent milk packaging film can enable consumers to directly see whether the milk has turned yellow or whether there...

Embodiment 2

[0036] To prepare a transparent milk packaging film, the dosage of each raw material is shown in Table 1, and the method is the same as in Example 1, except that the temperature of the extruder in step 2 is 155°C.

[0037] The transparent milk packaging film can enable consumers to directly see whether the milk has turned yellow or whether there is agglomeration, so that consumers can buy with confidence. At the same time, the product has a blocking effect on ultraviolet rays with a wavelength below 400nm, and the oxygen transmission rate is: (23°C, 50%RH) 3.60cm 3 / m 2 ·24h·0.1Mpa, with anti-oxidation and fresh-keeping functions.

Embodiment 3

[0039] To prepare a transparent milk packaging film, the dosage of each raw material is shown in Table 1, and the method is the same as in Example 1, except that the temperature of the extruder in step 2 is 160°C.

[0040] The transparent milk packaging film can enable consumers to directly see whether the milk has turned yellow or whether there is agglomeration, so that consumers can buy with confidence. At the same time, the product has a blocking effect on ultraviolet rays with a wavelength below 400nm, and the oxygen transmission rate is: (23°C, 50%RH) 3.53cm 3 / m 2 ·24h·0.1Mpa, with anti-oxidation and fresh-keeping effect.

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Abstract

The invention relates to a transparent milk packaging film and a preparation method thereof. The transparent milk packaging film is composed of an inner layer, a core layer and a surface layer which are sequentially stacked; the inner layer comprises the following components in parts by weight: 8-15 parts of high-pressure low-density polyethylene and 13-20 parts of metallocene polyethylene; the core layer comprises the following components in parts by weight: 30-40 parts of linear low-density polyethylene and 10-17 parts of polypropylene; and the surface layer comprises the following components in parts by weight: 15-23 parts of ultra-high molecular weight high-density polyethylene, 0.5-3 parts of antioxidant and 0.1-3 parts of aromatic agent. The transparent milk packaging film provided by the invention can be used for packaging foods such as milk, is capable of making consumers directly see the appearance of a food in the transparent milk packaging film and also capable of obstructing ultraviolet rays and reducing the phenomenon that oxygen oxidizes the food after penetrating through the packaging film so that the transparent milk packaging film has a fresh keeping effect.

Description

technical field [0001] The invention relates to the field of PE packaging film preparation, in particular to a transparent milk packaging film and a preparation method thereof. Background technique [0002] Most of the existing milk packaging films are black and white milk films. Black and white masterbatches are added to this material during production. Small molecular substances in the black and white masterbatches will precipitate to a certain extent and cause adverse effects on the quality and taste of food. At the same time, the light-shielding performance, anti-oxidation performance and fresh-keeping effect of the packaging film are average. [0003] Patent application CN101306743A discloses a milk packaging film, which is a composite film composed of an outer film connected with an inner film through an adhesive layer. The outer film is a polyvinylidene chloride film, bonded The agent is one of one or two-component polyurethane solvent or solvent-free adhesive, and t...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B27/06B32B27/32B32B27/18B29C48/08B29C48/18B65D65/40B29L7/00B29L9/00
CPCB32B27/08B32B27/32B32B27/327B32B27/18B29C48/08B29C48/18B65D65/40B32B2439/70B32B2307/412B32B2307/71B32B2307/7244B29L2007/00B29L2009/00
Inventor 黄作团黄家辉
Owner 福建富一锦科技有限公司
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