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A kind of water-soluble bag and its application

A water-soluble bag and system technology, applied in transportation and packaging, packaging, flexible and slender components, etc., can solve the problems that limit the wide application of polyvinyl alcohol film, poor mechanical properties, slow dissolution, etc., and achieve good water solubility, Avoid secondary infection and infection, the effect of no impurities on the surface

Active Publication Date: 2021-02-09
许连霞
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the generally obtained polyvinyl alcohol film dissolves very slowly at low temperature, and is even difficult to dissolve. At the same time, there are also problems with poor mechanical properties, which limits the wide application of polyvinyl alcohol film to a certain extent.

Method used

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  • A kind of water-soluble bag and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A water-soluble bag is made of raw materials comprising the following components by weight percentage:

[0025] 35% of polyvinyl alcohol, 6% of plasticizer, 1% of film-forming curing agent, 1% of surfactant, 1.5% of release agent, and the balance is water.

[0026] Among them, the degree of alcoholysis of polyvinyl alcohol is 78%.

[0027] The plasticizer is a mixture of dioctyl phthalate and dioctyl phthalate (the weight ratio of the two is 1:2).

[0028] The film-forming curing agent is formaldehyde.

[0029] The surfactant is a mixture of polysorbate 80 and sodium lauryl sulfate (the weight ratio of the two is 1:1).

[0030] The release agent package is glycerin.

[0031] The water-soluble bag of the present embodiment is made by following steps:

[0032] 1) Add polyvinyl alcohol, plasticizer, film-forming curing agent, surfactant, and mold release agent in sequence in water, and fully stir at a temperature of 90°C until there are no obvious solid particles by vi...

Embodiment 2

[0036] A water-soluble bag is made of raw materials comprising the following components by weight percentage:

[0037] 42% of polyvinyl alcohol, 5% of plasticizer, 2% of film-forming curing agent, 2% of surfactant, 1% of release agent, and the balance is water.

[0038] Among them, the degree of alcoholysis of polyvinyl alcohol is 88%.

[0039] The plasticizer is dibutyl phthalate.

[0040] The film-forming curing agent is a mixture of formaldehyde and glutaraldehyde (the weight ratio of the two is 5:2).

[0041] The surfactant is sodium lauryl sulfate.

[0042] The release agent is liquid paraffin.

[0043] The water-soluble bag of the present embodiment is made by following steps:

[0044] 1) Add polyvinyl alcohol, plasticizer, film-forming curing agent, surfactant, and mold release agent in sequence in water, and fully stir at a temperature of 80°C until there are no obvious solid particles by visual inspection to obtain a mixed solution;

[0045] 2) Seal the mixture o...

Embodiment 3

[0048] A water-soluble bag is made of raw materials comprising the following components by weight percentage:

[0049] 30% of polyvinyl alcohol, 6% of plasticizer, 3% of film-forming curing agent, 2.5% of surfactant, 1.5% of release agent, and the balance is water.

[0050] Among them, the degree of alcoholysis of polyvinyl alcohol is 78%.

[0051] The plasticizer is dioctyl phthalate.

[0052] The film-forming curing agent is glutaraldehyde.

[0053] The surfactant is soybean lecithin.

[0054] The release agent is a mixture of glycerin and stearic acid (the weight ratio of the two is 1:3).

[0055] The water-soluble bag of the present embodiment is made by following steps:

[0056] 1) Add polyvinyl alcohol, plasticizer, film-forming curing agent, surfactant, and mold release agent in sequence in water, and fully stir at a temperature of 100°C until there are no obvious solid particles by visual inspection to obtain a mixed solution;

[0057] 2) Seal the mixture obtained...

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Abstract

The invention discloses a water-soluble bag, which is made of raw materials including the following components in terms of weight percentage: 30-45% of polyvinyl alcohol, 5-8% of plasticizer, 1-8% of film-forming curing agent 3%, 0.5-2.5% surfactant, 1-1.5% release agent, and water as the balance. The present invention uses polyvinyl alcohol as the main material, compounding a specific amount of plasticizer, film-forming curing agent, surfactant and release agent, and under the joint action of each component, the water-soluble bag is produced by solution casting The appearance of the film is excellent, with the characteristics of softness, transparency, smoothness, no impurities, no spots, and no cracks on the surface. At the same time, the water-soluble bag also has good mechanical properties and water-soluble properties. The application of the water-soluble bag prepared by the invention in the medical and sanitation system and the elderly care service system.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to a water-soluble bag and its application. Background technique [0002] Polyvinyl alcohol is a high molecular polymer produced by polyvinyl acetate (VAc) through alcoholysis. It is soluble in water (above 95°C), slightly soluble in dimethyl sulfoxide, and insoluble in gasoline, kerosene, and vegetable oil. , Benzene, toluene, dichloroethane, carbon tetrachloride, acetone, ethyl acetate, methanol, ethylene glycol, etc. Polyvinyl alcohol (PVA) is an important chemical raw material, because its molecule contains both hydrophilic and highly active hydroxyl groups and hydrophobic acetyl groups, by changing its degree of polymerization, the ratio of hydroxyl and acetyl groups and the spatial structure , can make its properties change greatly. At present, PVA is widely used in the manufacture of polyvinyl acetal, gasoline-resistant pipes and vinylon synthetic fibers, fabric...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08L91/06C08K5/00C08K5/12C08K5/07C08K5/053C08K5/41C08K5/09C08J5/18B65D65/46
CPCB65D65/46B65D2565/381C08J5/18C08J2329/04C08K5/00C08K5/053C08K5/07C08K5/09C08K5/12C08K5/41C08K2201/014C08L29/04C08L91/06
Inventor 许连霞
Owner 许连霞