Preparation method of polyoxyethylene water-soluble film

Abstract

The invention relates to a preparation method of a polyoxyethylene water-soluble film. According to the method, polyoxyethylene serves as a raw material, additives are added, and the polyoxyethylene water-soluble film is prepared by an extruding and blow molding method. Compared with the prior art, the thickness of the prepared PEO film is 20-50 micrometers, the tensile strength of the film is higher than or equal to 10Mpa, the breaking elongation of the film is higher than or equal to 500%, and the dissolve time of the film is 20-150 seconds at the water temperature of 30 DEG C.

Description

technical field

[0001] The invention relates to the field of preparation of water-soluble films, in particular to a preparation method of polyoxyethylene water-soluble films. Background technique

[0002] Water-soluble film is a film material with both water solubility and degradability, because it can quickly dissolve in water to release the packaged object, without affecting the use effect of the packaged object, and can be destroyed by microorganisms, light, etc. Or oxygen and other degradation, will not cause environmental pollution, is an excellent environmental protection material.

[0003] At present, water-soluble films have been approved by the environmental departments of Europe, America, Japan and other countries, and are widely used in product packaging in agriculture, chemical industry, daily chemical industry, medical treatment and other fields. Typical uses include quantitative packaging for chemical products such as pesticides, fertilizers, pigments, dyes, f...

Examples

Embodiment 1

[0023] In the formula, the amount of PEO (200,000 viscosity-average molecular weight, mixed with 600,000) is 100%, the amount of ethylene glycol is 30%, the content of water-soluble starch is 15%, and the content of liquid paraffin is 0.4%. After mixing according to the above formula, first carry out extrusion granulation, the granulation temperature from machine head to film mouth is: 110°C, 130°C, 130°C, 135°C. The blowing temperature from the machine head to the film mouth is: 115°C, 130°C, 130°C, 135°C. The properties of the obtained film are shown in the table.

Embodiment 2

[0025] The formula is 100% of PEO (viscosity-average molecular weight 400,000, mixed with 800,000), ethylene glycol 35%, water-soluble starch 10%, and liquid paraffin 0.3%. After mixing according to the above formula, first carry out extrusion granulation. The granulation temperature from the machine head to the film mouth is: 105°C, 125°C, 125°C, 130°C. The blowing temperature from the machine head to the film mouth is: 110°C, 125°C, 125°C, 130°C. The properties of the obtained film are shown in the table.

Embodiment 3

[0027] The formula is that the amount of PEO (100,000 viscosity-average molecular weight, 600,000 mixed) is 100%, the amount of ethylene glycol is 20%, the content of cross-linked polyvinylpyrrolidone is 5%, and the content of liquid paraffin is 0.5%. After mixing according to the above formula, first carry out extrusion granulation, the granulation temperature from machine head to film mouth is: 100°C, 115°C, 115°C, 120°C. The blowing temperature from the machine head to the film mouth is: 105°C, 115°C, 115°C, 120°C. The properties of the obtained film are shown in the table.

technical field

[0001] The invention relates to the field of preparation of water-soluble films, in particular to a preparation method of polyoxyethylene water-soluble films. Background technique

[0002] Water-soluble film is a film material with both water solubility and degradability, because it can quickly dissolve in water to release the packaged object, without affecting the use effect of the packaged object, and can be destroyed by microorganisms, light, etc. Or oxygen and other degradation, will not cause environmental pollution, is an excellent environmental protection material.

[0003] At present, water-soluble films have been approved by the environmental departments of Europe, America, Japan and other countries, and are widely used in product packaging in agriculture, chemical industry, daily chemical industry, medical treatment and other fields. Typical uses include quantitative packaging for chemical products such as pesticides, fertilizers, pigments, dyes, f...

Examples

Embodiment 1

[0023] In the formula, the amount of PEO (200,000 viscosity-average molecular weight, mixed with 600,000) is 100%, the amount of ethylene glycol is 30%, the content of water-soluble starch is 15%, and the content of liquid paraffin is 0.4%. After mixing according to the above formula, first carry out extrusion granulation, the granulation temperature from machine head to film mouth is: 110°C, 130°C, 130°C, 135°C. The blowing temperature from the machine head to the film mouth is: 115°C, 130°C, 130°C, 135°C. The properties of the obtained film are shown in the table.

Embodiment 2

[0025] The formula is 100% of PEO (viscosity-average molecular weight 400,000, mixed with 800,000), ethylene glycol 35%, water-soluble starch 10%, and liquid paraffin 0.3%. After mixing according to the above formula, first carry out extrusion granulation. The granulation temperature from the machine head to the film mouth is: 105°C, 125°C, 125°C, 130°C. The blowing temperature from the machine head to the film mouth is: 110°C, 125°C, 125°C, 130°C. The properties of the obtained film are shown in the table.

Embodiment 3

[0027] The formula is that the amount of PEO (100,000 viscosity-average molecular weight, 600,000 mixed) is 100%, the amount of ethylene glycol is 20%, the content of cross-linked polyvinylpyrrolidone is 5%, and the content of liquid paraffin is 0.5%. After mixing according to the above formula, first carry out extrusion granulation, the granulation temperature from machine head to film mouth is: 100°C, 115°C, 115°C, 120°C. The blowing temperature from the machine head to the film mouth is: 105°C, 115°C, 115°C, 120°C. The properties of the obtained film are shown in the table.

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