Unlock instant, AI-driven research and patent intelligence for your innovation.

High-barrier degradable composite film for food packaging and manufacturing method and application thereof

A composite film and food packaging technology, which is applied in the field of packaging materials, can solve the problems of degradable plastic shopping bags, food safety doubts, etc., and achieve the effects of easy promotion, food safety, and low migration rate

Pending Publication Date: 2021-10-22
浙江大成新材料科技有限公司 +1
View PDF14 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In daily production and life, shopping bags inevitably come into contact with food, which leads people to doubt the food safety of degradable plastic shopping bags.

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
  • High-barrier degradable composite film for food packaging and manufacturing method and application thereof
  • High-barrier degradable composite film for food packaging and manufacturing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The manufacturing method of the high-barrier degradable composite film used for food packaging of the present embodiment includes:

[0026] Add the degradable masterbatch (calcium carbonate and PBAT blend) into the hopper of the double-die blown film machine, and extrude from the outer die; at the same time, add the high barrier material LDPE into the hopper of the double-die blown film machine, by Inner die extrusion; wherein, the outer die and the inner die constitute the coaxial extrusion port of the double die blown film machine;

[0027] The outer layer film 1 and the inner layer film 2 are converged and bonded to achieve composite, and a high-barrier degradable composite film is obtained. The mechanism is as follows: figure 1 shown;

[0028] Through the winding and bag-making process of high-barrier degradable composite films, degradable plastic bags (i.e., degradable shopping bags) are produced on a large scale, and have a double-layer composite structure, inclu...

Embodiment 2

[0034] The manufacturing method of the high-barrier degradable composite film used for food packaging of the present embodiment includes:

[0035] Add the degradable masterbatch (PLA and PBAT blend) into the hopper of the double-die blown film machine, and extrude from the outer die; at the same time, add the high barrier material PVDF into the hopper of the double-die blown film machine, from the inner die extrusion;

[0036] The outer layer film and the inner layer film are converged and bonded to achieve composite, and a high-barrier degradable composite film is obtained;

[0037] Through the winding and bag-making process of high-barrier degradable composite films, degradable plastic bags are produced on a large scale, and have a double-layer composite structure, including an outer degradable layer and an inner barrier layer.

[0038] Among them, the weight ratio of degradable masterbatch and PVDF raw material is 97:3;

[0039] The thickness of the inner PVDF layer of th...

Embodiment 3

[0042] The manufacturing method of the high-barrier degradable composite film used for food packaging of the present embodiment includes:

[0043] Add the degradable masterbatch (PLA and starch blend) into the hopper of the double-die blown film machine, and extrude from the outer die; at the same time, add the high barrier material PVDF into the hopper of the double-die blown film machine, and extrude from the inner die die extrusion;

[0044] The outer layer film and the inner layer film are converged and bonded to realize compounding to obtain a high-barrier degradable composite film;

[0045] Through the processes of winding, printing and bag-making of high-barrier degradable composite films, degradable plastic bags are produced on a large scale, and have a double-layer composite structure, including an outer degradable layer and an inner barrier layer.

[0046] Among them, the weight ratio of degradable masterbatch and PVDF raw material is 90:10;

[0047] The thickness ...

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 belongs to the technical field of packaging materials, and particularly relates to a high-barrier degradable composite film for food packaging and a manufacturing method and application thereof. The manufacturing method of the high-barrier degradable composite film for food packaging comprises the following steps: (1) respectively adding degradable plastic master batches and high-barrier material master batches into a hopper of a double-die-orifice film blowing machine; and (2) melting and extruding master batches by a double-die-orifice film blowing machine, blowing the film and rolling the film to obtain the high-barrier degradable composite film, wherein the high-barrier material master batches are extruded through an inner die orifice of the double-die-orifice film blowing machine, and the degradable plastic master batches are extruded through an outer die orifice of the double-die-orifice film blowing machine. The high-barrier degradable composite film is prepared by adopting a double-layer composite hot melting film blowing process, the characteristics of degradable plastic and the safety of a high-barrier material are both considered, and the concept of green packaging is met. The inner layer of a made shopping bag is made of a high-barrier material and has low migration rate, so that the food safety is ensured.

Description

technical field [0001] The invention belongs to the technical field of packaging materials, and in particular relates to a high-barrier degradable composite film used for food packaging and its manufacturing method and application. Background technique [0002] In recent years, degradable plastics have ushered in a huge development trend. Among them, polyester materials such as bio-based degradable plastic polylactic acid (PLA) and petroleum-based degradable plastic polybutylene terephthalate adipate (PBAT) have become the main force of degradable plastics; at the same time, due to their expensive In order to reduce the cost, inorganic fillers such as calcium carbonate and organic fillers such as starch and lignin are added to the degradable masterbatch to reduce the cost. Due to the inherent characteristics of the material itself, the barrier properties of these degradable plastic products are not as good as traditional plastics, such as polyethylene (PE), polyvinylidene c...

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 Applications(China)
IPC IPC(8): B29C55/28C08L67/04C08L67/02C08L3/02C08L27/16C08K3/26C08J5/18B29L9/00
CPCB29C55/28C08J5/18C08J2367/04C08J2367/02C08J2303/02C08J2327/16C08K2003/265B29L2009/00B29L2031/7128
Inventor 余厚咏沈明亮王闯沈丽琴周颖
Owner 浙江大成新材料科技有限公司