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Multi-layer laminates with films embossed on one side, based on partially acetalated polyvinyl alcohol

A polyvinyl alcohol film, polyvinyl alcohol technology, applied in the direction of layered products, coatings, household appliances, etc., can solve the problems of short residence time, low embossing speed, and reduced embossing quality.

Inactive Publication Date: 2008-10-08
KURARAY EURO GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This leads to a short residence time of the film in the embossing zone and thus to a low embossing speed
Conversely, if a roll surface that is too soft is applied, then only insufficient force can be exerted on the film, reducing the embossing quality

Method used

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  • Multi-layer laminates with films embossed on one side, based on partially acetalated polyvinyl alcohol
  • Multi-layer laminates with films embossed on one side, based on partially acetalated polyvinyl alcohol
  • Multi-layer laminates with films embossed on one side, based on partially acetalated polyvinyl alcohol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0068] Roughness R on both sides of the potash and magnesium salts z The plasticizer-containing PVB film composed of 72.5% by weight of PVB and 25% by weight of 3G8 of ≤ 5 μm is in image 3 Embossed in the device.

[0069] Device parameters:

[0070] Embossing roller diameter: 245mm

[0071] Rubber roller hardness: 70±5 Shore hardness-A

[0072] Rubber roller diameter: 255mm

[0073] Embossing roller roughness: about 80μm

[0074] Surface coating: PTFE

[0075] A membrane with the following embossing characteristics was obtained:

[0076] Line speed

(m / min)

line pressure

(N / mm)

T embossing roller

temperature(℃)

T rubber roller

temperature(℃)

R z (μm)

embossed surface

R z (μm)

Unembossed side

2.75

60

120

10

45

＜5

[0077] The resulting two films were laminated with the non-embossed side to a PET film having a thickness of 50 μm.

[0078] The film stack was...

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Abstract

The invention relates to an embossing process for the production of a film based on partially acetalized polyvinyl alcohol. The film is embossed on one side with a roughnesses, Rz, of 20 to 80 sum by embossing the side of the film between correspondingly roughened embossing rollers and pressing rollers with a certain Shore A hardness. The temperature of the film and the rollers is adjusted in order to fix the structure.

Description

technical field [0001] The invention relates to a process for the preparation of a film based on partially acetalized polyvinyl alcohol, which is smooth on one side and roughened on the other by embossing, and to the use of this film in the production of multilayer laminates application in the file. [0002] Typical composite glass panels consist of glass / polyvinyl butyral (PVB) / glass / laminate and have long been used in the construction sector or as windshields for automobiles. In order to improve the reflective and radiation-absorbing properties of such composite glazing, for example according to WO 97 / 03763 a laminate consisting of two PVB films and an intermediate functional layer can be used instead of a single PVB film. The adhesion of the interlayer film on glass is again determined by the known good adhesion properties of PVB, the additional function (eg reflectivity) being fulfilled by the functional layer (eg metal-evaporated PET film). [0003] The two film sides o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C59/04B32B27/06B29K29/00B29L7/00
CPCB32B17/10174B29C59/04B32B17/10688B29C2059/023B29K2029/00B32B17/10B32B17/10577B32B17/10761B29C59/022B29K2995/0072Y10T428/24612B32B17/10587B32B17/10005B32B2367/00C08J5/18
Inventor H·斯坦泽尔
Owner KURARAY EURO GMBH