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Foam type water-soluble packaging film and preparation method thereof

A water-soluble, packaging film technology, applied in the field of packaging, can solve the problems of large bubble content, reduce the mechanical properties and processing performance of water-soluble films, and achieve the effects of improving processing performance, broadening use conditions, and reducing production costs.

Pending Publication Date: 2022-05-27
JIANGMEN PROUDLY WATER SOLUBLE PLASTIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On this basis, the Chinese patent CN110869289A applied by the Netherlands Unilever Co., Ltd. discloses a water-soluble packaging film. Improves the water solubility of the packaging bag, but due to the relatively large air bubble content, it will greatly reduce the mechanical properties and processing properties of the water-soluble film

Method used

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  • Foam type water-soluble packaging film and preparation method thereof
  • Foam type water-soluble packaging film and preparation method thereof
  • Foam type water-soluble packaging film and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0035] The raw materials for the preparation of the water-soluble matrix in the present invention include polyvinyl alcohol (PVA). In addition, the water-soluble matrix in the present invention can also be modified polyvinyl alcohol, polyvinyl acetate, carboxymethyl cellulose, hydroxypropyl alcohol A combination of one or more of water-soluble materials such as cellulose.

[0036]In some embodiments, the weight average molecular weight of the polyvinyl alcohol is not higher than 100,000. The weight-average molecular weight described in the present invention is a conventional physical and chemical parameter of polyvinyl alcohol, and can be obtained by testing according to methods well known to those skilled in the art. In some embodiments, the weight average molecular weight of the polyvinyl alcohol is 30,000 to 100,000; preferably, 40,000 to 80,000.

[0037] In some embodiments, the polyvinyl alcohol has an alcoholysis degree of 60-99%. The degree of alcoholysis in this appl...

Embodiment 1

[0081] Example 1 : This embodiment provides a foam-type water-soluble packaging film, which includes a water-soluble matrix and air bubbles uniformly distributed in the water-soluble matrix; the diameter of the air bubbles is smaller than the thickness of the water-soluble packaging film; the volume of the air bubbles accounts for 55% of the total volume of the water-soluble matrix; the foam-type water-soluble packaging film, in parts by weight, includes the following components:

[0082]

[0083] The weight-average molecular weight of the polyvinyl alcohol is 75,000, and the alcoholysis degree is 88%; the surfactant is a mixture of sodium lauryl ether sulfosuccinate and polyoxyethylene stearyl ether, and the weight ratio is 2:1; the plasticizer is sorbitol and glycerin, and the weight ratio is 1:1.

[0084] The above-mentioned foam type water-soluble packaging film is prepared by the following method:

[0085] (1) put polyvinylpyrrolidone, talcum powder, plasticizer, sur...

Embodiment 2

[0090] Example 2 : This embodiment provides a foam-type water-soluble packaging film, which includes a water-soluble matrix and air bubbles uniformly distributed in the water-soluble matrix; the diameter of the air bubbles is smaller than the thickness of the water-soluble packaging film; the volume of the air bubbles accounts for 35% of the total volume of the water-soluble matrix; the foam-type water-soluble packaging film, in parts by weight, includes the following components:

[0091]

[0092] The weight-average molecular weight of the polyvinyl alcohol is 70,000, and the alcoholysis degree is 88%; the surfactant is a mixture of sodium lauryl ether sulfosuccinate and polyoxyethylene stearyl ether, and the weight ratio is 2:1; the plasticizer is sorbitol and glycerin, and the weight ratio is 1:1.

[0093] The above-mentioned foam type water-soluble packaging film is prepared by the following method:

[0094] (1) put polyvinylpyrrolidone, talcum powder, plasticizer, su...

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Abstract

The invention relates to the technical field of packaging, in particular to a foam type water-soluble packaging film and a preparation method thereof. The water-soluble foam comprises a water-soluble matrix and bubbles uniformly distributed in the water-soluble matrix, the diameter of the bubbles is smaller than the thickness of the water-soluble packaging film; the volume of the bubbles accounts for 5-80% of the total volume of the water-soluble matrix; the raw material of the water-soluble matrix comprises polyvinyl alcohol. The water solubility and mechanical properties of the water-soluble packaging film are effectively improved through the water-soluble matrix components, the proportion and the bubble content, the transverse tensile strength and the longitudinal tensile strength of the water-soluble packaging film are both not lower than 11 MPa and even can exceed 12.5 MPa, the transverse tensile elongation and the longitudinal tensile elongation can both exceed 55%, and the water-soluble packaging film is suitable for large-scale production. The processability of the water-soluble packaging film during packaging operation is considered while the water solubility of the film is improved, the use condition is widened, and the application range is expanded.

Description

technical field [0001] The invention relates to the technical field of packaging, in particular to a foam-type water-soluble packaging film and a preparation method thereof. Background technique [0002] As a kind of packaging material, the commonly used plastic packaging bag is a one-time packaging product with low price. It is widely used in the packaging of various products in daily life, especially for packaging chemical industrial products, such as pesticides, fertilizers, and dyes. , water treatment agents, concrete reinforcing materials and chemical reagents for horticultural care, etc.; but the used plastic packaging bags are not only not easy to degrade, but also contain a large number of residual polluting chemicals, these polluting waste plastic packaging bags are easy to form Secondary pollution, seriously pollutes the environment. Therefore, some polluting chemicals are quantitatively packaged in packaging bags made of water-soluble materials. The water-soluble...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L39/06C08J9/00C08J5/18
CPCC08J9/0033C08J9/0023C08J9/0095C08J5/18C08J2329/04C08J2439/06Y02W30/80
Inventor 吴达成莫雄勋
Owner JIANGMEN PROUDLY WATER SOLUBLE PLASTIC CO LTD