Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A transparent milk packaging film

A packaging film and milk technology, applied in packaging, packaged food, household packaging, etc., can solve the problems that packaging is difficult to recycle, the scope of recycle is limited, and the recycling cost is high, so as to achieve excellent light shielding performance and reduce resources Consumption and environmental pollution, awareness-raising effects

Active Publication Date: 2019-07-02
JIANGSU BEST RIEL PACKAGING MATERIALS CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this kind of packaging has played a good role in guaranteeing the quality of milk in terms of barrier and safety, due to its complex structure, including paper, aluminum foil, polyethylene and other plastic materials, the recycling cost is extremely high, and the scope of reuse is limited. Very limited, so most of the discarded packaging is difficult to recycle
The large amount of sewage discharged during the production process of the large amount of paper used will cause great pollution to the environment

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Use a plastic 5-layer co-extrusion blown film machine, in which the heat-sealing layer material polyethylene is added to the feed port of the inner layer and the inner 2 layer of the blown film machine; the raw material ethylene-vinyl alcohol of the barrier gas layer is added to the feed port of the middle layer Copolymer; in the outer 2-layer feeding port, add a mixture of light-blocking layer material nano-rare earth, light stabilizer and polyethylene; in the outer 1-layer feeding port, add protective layer material polyethylene; the processing temperature of the film blowing machine is set as follows: Extruder at 140-225°C, head at 200--215°C; co-extrusion processing to manufacture a film with a thickness of 90um, and provide printing on its protective layer, and then cut into a film with a width of 320mm. The oxygen transmission rate of the membrane is: (23°C, 50%RH) 4.05cm 3 / m 2 ·24h·0.1Mpa; (23℃, 90%RH)5.85cm 3 / m 2 ·24h·0.1Mpa water vapor transmission rate: W...

Embodiment 2

[0025] A plastic 5-layer co-extrusion blown film machine is used, in which a mixture of heat-sealing layer materials polyethylene and ethylene-vinyl acetate copolymer is added to the feed port of the inner layer and the inner 2 layers of the blown film machine; in the feed port of the middle layer, Add the raw material ethylene-vinyl alcohol copolymer of the barrier gas layer; add the mixture of nano-metal oxide, light absorber, colorant and polyethylene as the material of the light barrier layer to the feeding port of the outer 2 layers; add the protective layer to the feeding port of the outer 1 layer The material is polyethylene; the processing temperature of the film blowing machine is set as follows: extruder 140--225°C, head 200--215°C; co-extrusion processing produces a film with a thickness of 80um, and provides printing on its protective layer. It was then slit into films with a width of 320 mm. The oxygen transmission rate of the membrane is: (23°C, 50%RH) 4.88cm 3 ...

Embodiment 3

[0027] ① Use a plastic 3-layer co-extrusion casting machine, in which a mixture of heat-sealing layer materials polyethylene and acrylic acid copolymer is added to the inner and middle feeding ports of the casting machine; a gas barrier layer material is added to the outer feeding port A blend of polyvinyl alcohol and polyamide; available in semi-finished films with a thickness of 50um and printed on the gas barrier layer. The processing temperature of the casting machine is: extruder 190--240°C, head 210--250°C.

[0028] ② Use a plastic 3-layer co-extrusion blown film machine, in which a light-blocking material: a mixture of nano-talc powder and polyethylene is added to the inner feed port of the blown film machine; protective layer material polypropylene is added to the middle and outer feed ports A mixture with polyethylene; provide a film with a thickness of 30um. The processing temperature of the film blowing machine is: extruder 130--190°C, head 170--180°C.

[0029] ③ L...

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a transparent milk packaging film. Currently fresh milk soft packages mainly use a common three-layer coextrusion black-white milk film, a multilayer coextrusion high-barrier black-white milk film, a paper-plastic-aluminum composite film and the like, and the common defect of the films mentioned above is that the films are totally-sealed and nontransparent packages, consumers cannot see through the packages to see milk inside; due to the fact that the black master batch in the black-white milk films contains high-proportion pigment and additives, the pigment and the additives are extremely easy to separate out, and the safety and taste of milk are affected greatly; the paper-plastic-aluminum composite film comprising paper, aluminum foil and plastic materials such as polyethylene is complex in structure, high in recycling cost and limited in utilization range. The transparent milk packaging film provided to overcome the defects above has the advantages that the effective milk quality protection performance of the non-transparent packages is kept, a consumer can see through the outer package to see the milk inside, food safety is guaranteed, and the environment-friendly transparent milk packaging film can be directly recycled.

Description

[0001] Background technique: [0002] In recent years, with the increasing demand for dairy products and the continuous development of UHT sterilization technology, the demand for packaging films for various dairy products and liquid food is also increasing. According to incomplete statistics, in 2015, the amount of film used for milk packaging alone reached 27,200 tons (year). These include ordinary three-layer co-extruded black and white milk film, multi-layer co-extruded high-barrier black and white milk film, paper-plastic-aluminum composite film, etc., with a wide variety. But its common shortcoming is exactly that above-mentioned packing is fully enclosed, opaque packing. Consumers cannot see the visual image of the milk they are buying through the packaging. [0003] Secondly, from the perspective of food safety assurance, the black and white milk film used in the prior art has a large amount of black masterbatch added to the contact layer with milk, and the black maste...

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): B32B27/08B32B27/20B32B27/32B32B27/30B32B33/00
CPCB32B27/08B32B27/20B32B27/306B32B27/32B32B33/00B32B2307/412B32B2307/7242B32B2439/70
Inventor 刘建林刘燕
Owner JIANGSU BEST RIEL PACKAGING MATERIALS CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com