Method for manufacturing polyving akohol film and cast roller for same

A technology of polyvinyl alcohol film and polyvinyl alcohol, which is applied in the field of producing polyvinyl alcohol film by solution casting method, and can solve the problems affecting the surface weight of polyvinyl alcohol film, the peeling of the roller surface, and the adhesion between the electroplating layer and the metal base material Bad and other problems

Active Publication Date: 2014-05-14
CHANG CHUN PETROCHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to process requirements, the drum needs to be maintained at 85 to 95°C to remove moisture from the polyvinyl alcohol film. Under long-term use, there is likely to be poor adhesion between the electroplating layer and the metal base material, resulting in the surface of the drum being easily damaged. The phenomenon of peeling due to thermal expansion, which in turn affects the surface weight of the polyvinyl alcohol film

Method used

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  • Method for manufacturing polyving akohol film and cast roller for same
  • Method for manufacturing polyving akohol film and cast roller for same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 100 parts by weight of polyvinyl alcohol resin (saponification degree of 99.9 mole percent or more, polymerization degree of 2600), 10 parts by weight of glycerin, and 250 parts by weight of water are added to the dissolution tank, heated and dissolved at 130° C. to form a polyvinyl alcohol casting solution. After the polyvinyl alcohol casting solution is filtered through a filter, it is transported through a gear pump (gear pump) and a pipeline, and after being filtered again, it enters a T-die coating machine (T-DIE), so that the polyvinyl alcohol casting solution Cast to a casting drum made of a metal composite plate formed by explosive bonding of SB 410 and dual-phase steel, and obtain a polyvinyl alcohol film after drying. The processability and usage status of the casting drum, and the film surface detection results of the formed polyvinyl alcohol film are recorded in Table 1.

Embodiment 2

[0034] Add 100 parts by weight of polyvinyl alcohol resin (a saponification degree of 99.9 mole percent or more, and a degree of polymerization of 2600), 10 parts by weight of glycerin, 250 parts by weight of water, and 100 ppm of nonionic surfactant into a dissolution tank, and heat to dissolve at 130 ° C. A polyvinyl alcohol casting solution is formed. After the polyvinyl alcohol casting solution is filtered through a filter, it is transported through a gear pump (gear pump) and a pipeline, and after being filtered again, it enters a T-die coating machine (T-DIE), so that the polyvinyl alcohol casting solution Cast to a casting drum made of metal composite plates formed by explosive bonding of SB 410 and Hastelloy (HASTELLOY), and obtain a polyvinyl alcohol film after drying. The processability and usage status of the casting drum, and the film surface detection results of the formed polyvinyl alcohol film are recorded in Table 1.

Embodiment 3

[0036] Repeat the steps of Example 1, and use the casting drum made of metal composite plates formed by explosive bonding of SB 410 and SUS 316. The processability and usage status of the casting drum, and the film surface detection results of the formed polyvinyl alcohol film are recorded in Table 1.

[0037] Table 1

[0038]

[0039] The method of the present invention for producing polyvinyl alcohol film by solution casting is to use a metal composite plate formed by explosive bonding of a metal base material such as a carbon steel plate and a corrosion-resistant metal plate to form a casting drum. According to the above results, the casting drum used in the method of the present invention can have excellent corrosion resistance and hardness without complex electroplating processing, and can be used for making polyvinyl alcohol films for more than two years. There will still be no rust on the surface of the drum, and the surface of the formed polyvinyl alcohol film can ...

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Abstract

The present invention provides a method for manufacturing a polyving akohol film and a cast roller for the same, the method for manufacturing the polyving akohol film comprises the steps of preparing a polyving akohol casting solution, casting the polyving akohol casting solution to the cast roller, and forming a polyving akohol film on the surface of the cast roller. The cast roller is prepared in an explosion attaching manner though enabling a metal base material and an anti-corrosion metal plate to form a composite board material and through using the composite board; and compared with the prior chromeplated cast roller, the cast roller in the present invention not only is suitable for manufacturing a broad-width polyving akohol film, but also after continuously used, can be used for manufacturing the polyving akohol film with a high quality under a condition of not adding a release additive, thereby being helpful for industrial large-scale production.

Description

technical field [0001] The invention relates to a method for manufacturing a polyvinyl alcohol film, in particular to a method for manufacturing a polyvinyl alcohol film by a solution casting method. Background technique [0002] Polarizers can polarize natural light that is generally not polarized and convert it into polarized light. LCD liquid crystal display uses this kind of polarized light, coupled with the twisting characteristics of liquid crystal molecules, to control the passage of light. With the wide application of liquid crystal displays, the market demand for polarizers is also rising. The polarizer mainly uses polyvinyl alcohol (PVA) polymer film as the polarizing substrate, so the quality of the PVA film will directly affect the use effect of the polarizer. [0003] Polyvinyl alcohol is a water-soluble high molecular polymer with a wide range of uses. After the polyvinyl alcohol resin is dissolved in water to form a solution, it has good film-forming propert...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L29/04
Inventor 萧国泷邱源炎江锦宏罗国年廖嘉甫
Owner CHANG CHUN PETROCHEMICAL CO LTD
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