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Special cold-water instant packaging film for laundry detergent

A packaging film and laundry detergent technology, applied in the field of hydroxyethyl modified polyvinyl alcohol water-soluble packaging film and its preparation, can solve the problems of film mechanical strength reduction, low production efficiency, humidity sensitivity, etc., and achieve excellent thermoplastic processing performance , Improve production efficiency, good heat sealing performance

Inactive Publication Date: 2015-05-20
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, wet processing has high production efficiency and low cost, and on the other hand, it is sensitive to humidity. During use, it is easy to be affected by high humidity or contacting water droplets, which will cause the mechanical strength of the film to decrease or even block or dissolve. The water-soluble film produced by the method is not easy to be heat-sealed
Patent CN102762612A discloses an improved water-soluble film containing a blend of PVOH polymers, using polyvinyl alcohol with a nominal viscosity of 13.5 to 20 cp and a polyvinyl alcohol blend with a nominal viscosity of less than 11 cp, and glycerin, sorbose Alcohol, propylene glycol, etc. are used as plasticizers to prepare a water-soluble film with good water drop resistance. The preparation process mixes the polymer, plasticizer and other additives with water, and then removes the water after casting the film. The main plasticizer contained in the film is glycerin or sorbitol, etc. Although this method improves the heat sealing performance of the film, the preparation process is complex and the water needs to be dried under appropriate conditions after casting the film, which affects production efficiency.

Method used

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  • Special cold-water instant packaging film for laundry detergent
  • Special cold-water instant packaging film for laundry detergent
  • Special cold-water instant packaging film for laundry detergent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Record by weight:

[0058]

[0059] The above formula, polyvinyl alcohol raw materials, plasticizers, antioxidants, release agents, nano-compounds, anti-blocking agents in a high-speed mixer, 2000rpm, 70 ° C after mixing evenly, the resulting mixture is added to the long diameter of the screw Ratio L / D=45:1, screw diameter Φ35mm Extrusion granulator, extrusion granulation in the range of 120~250℃.

[0060] Extrude and cast the pellets obtained in the step (2) at a relative humidity of 50% within the range of 150-250° C. to obtain a cold-water instant packaging film special for laundry detergent with a thickness of 0.035 mm.

[0061] The relevant performance parameters of the packaging film are shown in the table below:

[0062]

Embodiment 2

[0064]

[0065] The above formula, polyvinyl alcohol raw materials, plasticizers, antioxidants, release agents, nano-compounds, anti-blocking agents in a high-speed mixer, 2000rpm, 70 ° C after mixing evenly, the resulting mixture is added to the long diameter of the screw Ratio L / D=60:1, screw diameter Φ65mm Extrusion granulator, extrusion granulation in the range of 120~250℃.

[0066] Extrude and cast the pellets obtained in step (2) at a relative humidity of 50% within the range of 150-250° C. to obtain a cold-water instant packaging film special for laundry detergent with a thickness of 0.045 mm.

[0067] The relevant performance parameters of the packaging film are shown in the table below:

[0068]

[0069]

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Abstract

The invention discloses a special cold-water instant packaging film for a laundry detergent, and a method for preparing the film. The method comprises the following steps: with modified polyvinyl alcohol with the hydroxyethyl content being 1-3wt% as a main raw material, adding assistants such as a mixed plasticizer, an antioxidant and an anti-blocking agent; and preparing a water-soluble polyvinyl alcohol film by a molten curtain coating method. The trend of easy crosslinking in polyvinyl alcohol melting and processing at present is overcome by the modified polyvinyl alcohol and the mixed plasticizer; a water-soluble packaging material which is excellent in performance and can be completely dissolved at a room temperature is obtained; and the film can be applied to packing of liquid detergents, laundry detergents and the like.

Description

technical field [0001] The invention belongs to environment-friendly water-soluble packaging materials, in particular to a hydroxyethyl modified polyvinyl alcohol (HEC-PVA) water-soluble packaging film and a preparation method thereof. Background technique [0002] Water-soluble polymer films are usually used as packaging materials for products such as detergents / pharmaceuticals, and unit packaging bags made of water-soluble films can simplify the distribution, pouring, dissolution and dosing of such products during use, avoiding users and chemicals Direct contact occurs, which is safe and hygienic, while enabling more precise metering of doses, eliminating the need for consumers to weigh such products. The unit packaging also avoids the confusion caused by dispensing similar products from containers, dispensing and pouring. Therefore, the pre-dose unit pack made of water-soluble polymer film can provide convenience for consumers. [0003] Generally, when consumers use sim...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08K13/02C08K5/053C08K5/134C08K5/526C08K5/098C08K3/16C08K5/21C08K5/378C08K3/34C08K3/36C08L3/02B65D65/46B29C55/28
CPCY02W90/10
Inventor 项爱民高伦巴根田华峰
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY