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Water-soluble film, method for producing same, and pharmaceutical package

A water-soluble film and packaging technology, applied in packaging, wrapping paper, transportation and packaging, etc., can solve the problems of reduced production efficiency, position deviation, and difficult handling of packaging

Pending Publication Date: 2020-10-23
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the water-soluble film curls, for example, when the water-soluble film is used to manufacture a package, it may be difficult to handle or the position may be displaced during sealing, so there is a problem that the production efficiency of the package will decrease, and further improvement is expected.

Method used

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  • Water-soluble film, method for producing same, and pharmaceutical package
  • Water-soluble film, method for producing same, and pharmaceutical package

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0195] Although an Example is given below and this invention is demonstrated more concretely, this invention is not limited to the following Example unless the summary is exceeded.

[0196] In addition, in an example, "part" and "%" mean a weight basis.

[0197]

[0198] Carboxyl-modified PVA ( A1) 90 parts, 10 parts of unmodified PVA (A2) with a 4% aqueous solution viscosity of 18 mPa·s and an average degree of saponification of 88 mol % at 20 ° C, 20 parts of sorbitol (b1) as plasticizer (B) and 20 parts of glycerin (b2), 8 parts of starch (average particle diameter 20 μm) as filler (C), 0.2 part of polyoxyalkylene alkyl ether phosphate monoethanolamine salt as surfactant (D) and water are mixed, Dissolution treatment was performed to obtain a starch-dispersed PVA-based resin aqueous solution (solid content concentration: 30%).

[0199] Next, using the above-mentioned PVA-based resin aqueous solution, a film was formed according to the cast film-forming method by a belt-...

Embodiment 2

[0219] In Example 1, the coating amount of water was changed to 1.55g / m 2 , except that, a PVA-based water-soluble film having a water content of 8.5% was obtained in the same manner. For the obtained PVA-based water-soluble film, the result of measuring the crystallinity index of the film surface represented by the aforementioned formula (1) by infrared spectroscopic analysis using the attenuated total reflection method (ATR method), Xa=0.559, Xb=0.543 , Xa-Xb is 0.016.

[0220] The obtained water-soluble film was evaluated in the same manner as in Example 1 for curling and film state. The results are shown in Table 1.

Embodiment 3

[0222] In Example 1, the coating amount of water was changed to 4.65g / m 2 , except that, a PVA-based water-soluble film having a water content of 11.4% was obtained in the same manner. For the obtained PVA-based water-soluble film, the results of measuring the crystallinity index of the film surface represented by the aforementioned formula (1) by infrared spectroscopic analysis using the attenuated total reflection method (ATR method), Xa=0.572, Xb=0.514 , Xa-Xb is 0.058. The obtained water-soluble film was evaluated in the same manner as in Example 1 for curling and film state. The results are shown in Table 1.

[0223]

[0224] In Example 1, a PVA-based water-soluble film having a moisture content of 7% was obtained in the same manner except that the moisture surface coating and heat treatment were not performed. For the obtained PVA-based water-soluble film, the results of measuring the crystallinity index of the film surface represented by the aforementioned formula ...

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Abstract

Provided is a water-soluble film containing a polyvinyl alcohol-based resin (A), wherein curling is suppressed even after long-term storage. When the crystallinity index X represented by equation (1)below is measured on both surfaces of the water-soluble film by attenuated total reflection infrared spectroscopy, the difference between the crystallinity index Xa on one surface of the film and thecrystallinity index Xb on the other surface of the film (Xa>=Xb), i.e., Xa-Xb, which is the difference in crystallinity index between the two surfaces of the film, is 0.015-0.10. (1) X=ABS1141 / ABS1093(ABS1141: absorbance at a wavenumber of 1141 cm-1, ABS1093: absorbance at a wavenumber of 1093 cm-1).

Description

technical field [0001] The present invention relates to a water-soluble film containing a polyvinyl alcohol-based resin as a main component, and more specifically, to a water-soluble film whose curling is suppressed even after long-term storage, a method for producing the film, and a drug package. Background technique [0002] A polyvinyl alcohol-based film is a film made of a water-soluble polyvinyl alcohol-based resin although it is a thermoplastic resin, and is commonly used in packaging films such as polyethylene terephthalate films and polyolefin films. Compared with the hydrophobic film, the various physical properties and texture of the film are greatly different. [0003] However, subpackaging (unit packaging) of chemicals has been proposed, which effectively utilizes the water solubility of polyvinyl alcohol-based resins to add various chemicals such as agricultural chemicals and detergents to bags formed of films of polyvinyl alcohol-based resins. Used for a wide ...

Claims

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Application Information

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IPC IPC(8): C08J7/02B65D65/46C08J5/18C08J7/00
CPCC08J7/02C08J5/18C08L29/04C08L2205/025C08L2205/035C08F216/06C08J2329/04C11D17/042C08K5/053C08L3/02C08L71/02C08F222/16C08L2203/16C11D17/043
Inventor 中原耕一郎市来隼哉
Owner MITSUBISHI CHEM CORP
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