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Degradable cup cover film

A technology of cup lid film and cup lid, which is applied in the field of degradable cup lid film, can solve the problem of tensile performance, puncture resistance, heat sealing performance, air and water vapor barrier performance, and the formulation design of degradable cup lid film material It is not scientific and reasonable enough, unable to meet the needs of production and packaging, etc., to achieve the effect of scientific and reasonable design, excellent sealing performance and strong impact resistance

Pending Publication Date: 2021-10-01
武汉欣宏创塑料印刷包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The formula design of the existing degradable cup lid film materials is not scientific and reasonable enough, and there are many deficiencies in use: 1) The tensile properties, puncture resistance properties, heat sealing properties and barrier properties to air and water vapor are not ideal, Not suitable for composite packaging; 2) The heat seal fastness of the product is usually ≤6N, which cannot meet the needs of production and packaging; 3) The product can be completely dissolved in water after 5 minutes of contact with water, which cannot meet the needs of degradable cup lids in daily life. Membrane Material Requirements

Method used

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preparation example Construction

[0038] The preparation method of this degradable cup cover film comprises the steps:

[0039] 1) mixing the p-dioxanone polymer, starch and compatibilizer uniformly according to the proportion to obtain the mixed raw material;

[0040] 2) Transport the mixed raw materials into the hot melt container through the pump;

[0041] 3) The degradable mixed raw materials that are completely thermally dissolved are blown up by blow molding. In this step, the thickness of the film should be controlled and the rotary die head should be turned on;

[0042] 4) Rapid cooling of the blown degradable material through air-cooling and water-cooling modes, and corona treatment;

[0043] 5) Cut off the side strips at both ends, and wind up to obtain the desired degradable cup lid film.

[0044] In the present invention, each component and weight percent thereof are as follows in the modified thermoplastic starch:

[0045]

[0046] Wherein, the modified soybean starch is obtained by weighing...

Embodiment 1

[0051] A kind of degradable cup cover film, the content by weight of each component in this degradable cup cover film is:

[0052] 60 parts of p-dioxanone polymer;

[0053] 30 parts of modified thermoplastic starch;

[0054] Compatibilizer 10 parts.

[0055] In the present embodiment, each component and weight percent thereof in the modified thermoplastic starch are as follows:

[0056]

Embodiment 2

[0058] A kind of degradable cup cover film, the content by weight of each component in this degradable cup cover film is:

[0059] 55 parts of p-dioxanone polymer;

[0060] 36 parts of modified thermoplastic starch;

[0061] Compatibilizer 9 parts.

[0062] In the present embodiment, each component and weight percent thereof in the modified thermoplastic starch are as follows:

[0063]

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Abstract

The invention discloses a degradable cup cover film. The degradable cup cover film comprises the following components in parts by weight: 50-70 parts of a p-dioxanone polymer; 20-40 parts of modified thermoplastic starch; 8-12 parts of a compatibilizer; the preparation method comprises the following steps: 1) uniformly mixing the p-dioxanone polymer, the starch and the compatibilizer in proportion to obtain a mixed raw material; 2) conveying the mixed raw materials into a hot melting container through a pump; 3) carrying out blow molding on the degradable mixed raw material which is completely thermally dissolved in an upward blow molding manner, controlling the thickness of the film in the step, and starting a rotary die head; 4) rapidly cooling the blow-molded degradable material in air cooling and water cooling modes, and carrying out corona treatment; 5) cutting off edge strips at the two ends, and performing rolling. The prepared cup cover film is good in toughness, excellent in heat sealing performance, excellent in sealing performance, high in impact resistance and excellent in pressure resistance and falling resistance, and the functional requirements of various degradable cup cover films are met.

Description

technical field [0001] The invention relates to the technical field of degradable materials, in particular to a degradable cup cover film. Background technique [0002] With the continuous improvement of people's cultural quality, the awareness of environmental protection is getting stronger and stronger, and people are more and more aware of the pollution caused by packaging materials to the environment, because after the packaging materials are abandoned, their strong stability can exist in the natural environment for a long time Among them, it is one of the important sources of pollution in people's production and life. The usual recovery methods are landfill or incineration, which not only consumes energy, but also causes secondary pollution to the environment. In recent years, while people are studying waste plastic recycling technology, degradable materials have also become a research hotspot in the world. Under the action of microorganisms, they will automatically de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L3/04C08L1/02C08L69/00C08K5/053C08K3/34C08J5/18
CPCC08J5/18C08J2367/04C08J2403/04C08J2401/02C08J2469/00C08K5/053C08K3/346
Inventor 张和平
Owner 武汉欣宏创塑料印刷包装有限公司