A kind of transparent milk packaging film and preparation method thereof

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

Active Publication Date: 2022-01-18
福建富一锦科技有限公司
View PDF17 Cites 0 Cited by
  • 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 still the problem of dissolution of small molecules in the black and white masterbatch

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of 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 effect.

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.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
melt flow indexaaaaaaaaaa
densityaaaaaaaaaa
Login to view more

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 stacked in sequence, and the inner layer includes the following components in parts by weight: high pressure and low density 8-15 parts of polyethylene, 13-20 parts of metallocene polyethylene; the core layer includes the following components in parts by weight: 30-40 parts of linear low-density polyethylene, 10-17 parts of polypropylene; the surface layer The following components are included 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 of the present invention can be used for packaging food such as milk. Consumers can directly see the appearance of the food inside, and at the same time, it can also block ultraviolet rays, reduce the oxidation of food through the packaging film by oxygen, and have 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap