A kind of multi-layer composite film for aseptic filling of liquid food and its preparation process

A multi-layer composite film and aseptic filling technology, applied in packaging, coating, lamination, etc., can solve the problems of low heat sealing temperature, high heat sealing temperature of composite film, poor heat sealing effect, etc., and achieve simple production Convenience, good low temperature heat sealability, good heat sealing effect

Active Publication Date: 2021-02-26
上海万封新材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem in the prior art that the overall heat-sealing effect of the composite film is not good due to the high heat-sealing temperature of the composite film during the high-speed filling heat-sealing process, the first purpose of the present invention is to provide a method for aseptic filling of liquid food The multi-layer composite film, by adding high thermal conductivity filler in metallocene linear low density polyethylene, and coating on the surface of the film made by blown film method by extrusion lamination, to solve the above technical problems, it has a lower thermal Sealing temperature, and has a good heat sealing effect in the process of high-speed filling heat sealing

Method used

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  • A kind of multi-layer composite film for aseptic filling of liquid food and its preparation process
  • A kind of multi-layer composite film for aseptic filling of liquid food and its preparation process
  • A kind of multi-layer composite film for aseptic filling of liquid food and its preparation process

Examples

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Embodiment 1

[0039] Example 1: A multi-layer composite film for aseptic filling of liquid food, the components and their corresponding parts by weight are shown in Table 1, and are prepared through the following steps:

[0040] Step 1, co-extrusion blown film, put low-density polyethylene, ethylene-vinyl alcohol copolymer and TIE adhesive layer resin into the co-extrusion blown film machine in corresponding parts by weight to obtain a structure of low-density polyethylene / TIE bonded Layer resin / ethylene-vinyl alcohol copolymer / TIE adhesive layer resin / low-density polyethylene base material, the melt index of low-density polyethylene is 2g / 10min, the extrusion resin temperature is 180 ° C, the low-density polyethylene The amount of coating on one side is 10g / m 2 , the thickness of the substrate is 30 μm;

[0041] Step 2, preparing the mixture, melting the metallocene linear low density polyethylene in the corresponding parts by weight, adding the high thermal conductivity filler in the cor...

Embodiment 2-8

[0044] Example 2-8: A multi-layer composite film for aseptic filling of liquid food. The difference from Example 1 is that each component and its corresponding parts by weight are shown in Table 1.

[0045] Each component and parts by weight thereof in table 1 embodiment 1-8

[0046]

[0047]

Embodiment 9

[0048] Embodiment 9: A multilayer composite film for aseptic filling of liquid food. The difference from Embodiment 1 is that the high thermal conductivity filler includes boron nitride and aluminum nitride, and boron nitride and aluminum nitride The ratio of parts by weight is 1:0.7, the particle size of boron nitride is 3 μm under the D50 standard, and the particle size of aluminum nitride is 2 μm under the D50 standard.

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Abstract

The invention discloses a multi-layer composite film for aseptic filling of liquid food and its preparation process, relates to the technical field of potting and packaging, and solves the problem of high heat-sealing temperature of the composite film during the high-speed filling heat-sealing process. It leads to the problem that its overall heat sealing effect is not good. The components include the following parts by weight: 35-45 parts of low-density polyethylene; 36-45 parts of metallocene linear low-density polyethylene; 8-10 parts of ethylene-vinyl alcohol copolymer; 5-8 parts of TIE adhesive layer resin ; 3 to 7 parts of high thermal conductivity filler. The multi-layer composite film used for liquid food aseptic filling in the present invention has lower heat-sealing temperature and wider sealing temperature, and has good heat-sealing effect in the high-speed filling heat-sealing process.

Description

technical field [0001] The invention relates to the technical field of potting and packaging, more specifically, it relates to a multi-layer composite film for aseptic filling of liquid food and a preparation process thereof. Background technique [0002] On the basis of the development of the packaging industry, the packaging of articles has also been developed accordingly. From simple paper packaging, to single-layer plastic film packaging, to the widespread use of composite materials. The composite film can make the contents of the package have the characteristics of moisturizing, fragrance preservation, appearance, freshness preservation, light protection, penetration prevention, and extended shelf life, so it has developed rapidly. [0003] In the Chinese invention patent with the notification number CN103770422A, a high-stiffness puncture-resistant low-friction coefficient composite film and its preparation process are disclosed, including KPET film layer, polyamide f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/32B32B27/30B32B27/08B32B37/00B65D65/40C09D123/08C09D7/61
CPCB32B27/08B32B27/306B32B27/32B32B37/00B32B2255/10B32B2307/31B32B2307/552B32B2307/714B32B2307/724B65D65/40C08K2003/282C08K2003/385C09D123/0815C09D7/61C08K3/38C08K3/28
Inventor 郦国强方军汪慧蓉王晓井
Owner 上海万封新材料技术有限公司
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