Preparation method of heavy packaging composite membrane

A heavy packaging and composite film technology, which is applied in the field of heavy packaging composite film preparation, can solve the problems of polluting contents, a large amount of waste solvents, affecting the ecological environment and human health, and achieve the effect of good composite strength

Active Publication Date: 2015-04-01
HUANGSHAN NOVEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dry lamination method generally uses solvent-based adhesives, which will not only produce solvent residues and pollute the packaged contents, but also produce a large amount of waste solvents, which will affect the ecological environment and human health.

Method used

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  • Preparation method of heavy packaging composite membrane
  • Preparation method of heavy packaging composite membrane
  • Preparation method of heavy packaging composite membrane

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] The invention provides a kind of preparation method of heavy packaging composite film, comprises the following steps:

[0022] Coating solvent-free adhesive to heavy packaging film surface, the sizing amount of described solvent-free adhesive is 2.6g / m 2 ~3.0g / m 2 ;

[0023] Composite the heavy packaging film coated with the solvent-free adhesive and the functional film, the composite tension is 45N~65N;

[0024] The obtained composite film is wound up;

[0025] The composite film after winding is subjected to aging treatment to obtain a composite film for heavy packaging.

[0026] In the invention, the solvent-free adhesive is coated on the surface of the heavy packaging film, and then the heavy packaging film coated with the solvent-free adhesive is combined with the functional film, and the heavy packaging composite film is obtained after winding and aging treatment. The invention obtains a heavy-duty packaging composite film with good composite strength, heat-se...

Embodiment 1

[0041] Using linear low-density polyethylene film (LLDPE) as the base material, apply two-component polyurethane adhesive on the surface of the LLDPE film, the coating temperature is 50°C, and the glue amount is 2.6g / m 2 , the unwinding tension of the LLDPE film is 15N; the LLDPE film coated with the adhesive is compounded with the BOPA film to obtain a composite film, the composite tension is 60N, and the unwinding tension of the BOPA film is 3N; 15%; the composite film after winding was cured for 36 hours at a humidity of 45RH% and a temperature of 50°C to obtain a 15BOPA / 90LLDPE composite film;

Embodiment 2~6

[0056] Prepare the 15BOPA / 90LLDPE composite film according to the raw materials, methods and steps provided in Example 1. The difference is that the amount of gluing is controlled according to Table 3, and the composite strength of the obtained composite film is shown in Table 3. Table 3 shows Examples 2 to 6 of the present invention. The amount of glue applied and the composite strength of the composite film provided.

[0057] Table 3 The amount of gluing and the composite strength of the composite film provided by Examples 2 to 6 of the present invention

[0058]

[0059] It can be seen from Table 3 that in the preparation method provided by the present invention, when the amount of sizing agent is low, the composite strength of the obtained composite film cannot meet the standard requirements.

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Abstract

The invention provides a preparation method of a heavy packaging composite membrane. The method comprises the steps of: coating a heavy packaging membrane surface with a solvent-free adhesive, the spreading amount of which is 2.6g / m<2>-3.0g / m<2>; compounding the heavy packaging membrane with a functional membrane under a compounding tensile force of 45N-65N; rolling up the obtained composite membrane; and subjecting the rolled composite membrane to an aging treatment, thus obtaining the heavy packaging composite membrane. In the invention, the spreading amount of the solvent-free adhesive is controlled at 2.6g / m<2>-3.0g / m<2>, the compounding tensile force of the heavy packaging membrane and the functional membrane is controlled at 45N-65N, and while the adhesive dosage is reduced, the obtained composite membrane can have good compounding strength, heat sealing strength and tensile strength. Because of no need to use a solvent, the composite membrane obtained by the invention basically generates no solvent residue, so that the influence on the packaged contents, environment and human health can be small.

Description

technical field [0001] The invention belongs to the technical field of packaging films, in particular to a preparation method of a composite film for heavy packaging. Background technique [0002] According to the classification methods of European and American countries, the packaging film that can carry 10kg~50kg solid particles or powdery materials is generally called heavy packaging film. The current forms of heavy packaging bags include plastic woven bags, paper-plastic composite bags, paper bags and FFS films. Among them, FFS film refers to the film suitable for heavy-duty packaging produced by FFS production technology. FFS production technology mainly includes three main links, namely bottom cutting (form), packaging line automatic filling (fill) and bag sealing (seal). FFS heavy-duty packaging film is a new type of packaging film product that can realize continuous one-time automatic forming, opening filling, heating and sealing, etc. And the need for automatic p...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B32B37/12
Inventor江继忠鲍祖本方洲潘健谢文汇陈旭
OwnerHUANGSHAN NOVEL