High-leakproofness multichannel packaging composite membrane and production technology thereof

A high-tightness, composite film technology, applied in packaging, wrapping paper, transportation and packaging, etc., can solve the problems of large width of multi-channel roll film, easy deviation of film running, and difficult film cutting, etc., to achieve excellent vertical and horizontal Tear force, excellent thickness stability, and improved packaging efficiency

Active Publication Date: 2019-07-30
HUANGSHAN NOVEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the characteristics of multi-channel roll film, such as large width, high requirements for equipment matching, and strict sealing performance, have brought great challenges to the flexible packaging industry.
On the whole, the general multi-channel roll film has poor film uniformity; the film is easy to run off the machine; poor sealing, high air leakage rate; Poor, the film is not easy to cut, the edges have many burrs and other shortcomings, which seriously affect the production efficiency of downstream enterprises

Method used

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  • High-leakproofness multichannel packaging composite membrane and production technology thereof
  • High-leakproofness multichannel packaging composite membrane and production technology thereof
  • High-leakproofness multichannel packaging composite membrane and production technology thereof

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preparation example Construction

[0036] The preparation process list of the three-layer co-extruded PE film of the present invention is shown in Table 1 below:

[0037] Table 1

[0038]

[0039]

[0040]

[0041] The composite process list of composite film of the present invention is as shown in table 2 below:

[0042] Table 2

[0043]

[0044]

Embodiment 1

[0047] Step 1, prepare a three-layer co-extrusion PE film: according to the following formula requirements, add the materials in the corona layer, middle layer and heat-sealing layer to the three-layer co-extrusion blown film machine, plasticize into a melt through the corresponding barrel, and melt extrude When it comes out, it passes through a filter to filter impurities and reaches the die head; after that, the three-layer co-extruded PE film is obtained through blown film, air-cooled shaping, plywood foaming, traction cooling, corona, and winding. The preparation process is shown in Table 1. ;

[0048] The corona layer comprises a mass ratio of 59.8:33.3:6.9 linear low-density polyethylene, low-density polyethylene and fluorine-containing processing aids, and the intermediate layer comprises a mass ratio of 50:25:25 of low-density polyethylene, Linear low-density polyethylene and high-density polyethylene, the heat-sealing layer includes a first metallocene linear low-dens...

Embodiment 2

[0052] Step 1, prepare a three-layer co-extrusion PE film: according to the following formula requirements, add the materials in the corona layer, middle layer and heat-sealing layer to the three-layer co-extrusion blown film machine, plasticize into a melt through the corresponding barrel, and melt extrude When it comes out, filter impurities through the filter and reach the die head; then, the three-layer co-extruded PE film is obtained through film blowing, air-cooling and shaping, plywood foaming, traction cooling, corona, and winding;

[0053] The corona layer comprises a mass ratio of 59:33:6 linear low-density polyethylene, low-density polyethylene and fluorine-containing processing aids, and the intermediate layer comprises a mass ratio of 49:24:24 of low-density polyethylene, Linear low-density polyethylene and high-density polyethylene, the heat-sealing layer includes a first metallocene linear low-density polyethylene, a second metallocene linear low-density polyethy...

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Abstract

The invention relates to a high-leakproofness multichannel packaging composite membrane and a production technology thereof. The composite membrane is formed by compounding a PET membrane, an aluminumfoil membrane and a three-layer co-extrusion PE membrane through an adhesive; the three-layer co-extrusion PE membrane comprises a corona layer, an intermediate layer and a heat-seal layer, wherein the corona layer comprises linear low-density polyethylene, low-density polyethylene and a fluorine-containing processing aid, the intermediate layer comprises low-density polyethylene, linear low-density polyethylene and high-density polyethylene, the heat-seal layer comprises first metallocene linear low-density polyethylene, second metallocene linear low-density polyethylene, polybutylene, a slipping agent and open masterbatches, and the melting index of the first metallocene linear low-density polyethylene is smaller than that of the second metallocene linear low-density polyethylene. The composite membrane has excellent thickness stability, the friction coefficient is 0.2-0.3, and machine running is facilitated; the heat-seal strength and heat-bonding strength are high, the membrane isresistant to negative pressure larger than or equal to 0.8 MPa, and the leakproofness is excellent; the Elmendorf tearing force is low, the thin membrane is easy to cut, and filament generation doesnot occur.

Description

technical field [0001] The invention belongs to the field of film packaging materials, and in particular relates to a high-tightness multi-channel packaging composite film and a production process thereof. Background technique [0002] At present, food and pharmaceutical packaging is more and more about packaging efficiency. Single-channel processing equipment has low efficiency and serious waste, and is gradually replaced by multi-channel equipment. Multi-channel equipment is a device with multiple outlets in parallel during operation. The cutter divides to form multiple lanes, and the corresponding roll film is cut into multiple layouts by the cutter to run at the same time, so as to realize one-time processing of multiple packaging bags. With the development of the trend, the market demand for multi-channel roll film is increasing, and the quality requirements for multi-channel roll film are also getting higher and higher. However, the characteristics of multi-channel ro...

Claims

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Application Information

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IPC IPC(8): B32B7/12B32B27/36B32B27/06B32B15/20B32B27/32B32B27/18B32B27/08B32B15/09B32B15/085B32B37/12B65D65/40
CPCB32B7/12B32B15/085B32B15/09B32B15/20B32B27/06B32B27/08B32B27/18B32B27/32B32B27/36B32B37/12B65D65/40
Inventor 胡凯汪学文张和平刘学军董文辉
Owner HUANGSHAN NOVEL
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