Polyvinyl acetal resin film for laminated glass

A polyvinyl acetal resin, laminated glass technology, applied in synthetic resin layered products, glass/slag layered products, coatings, etc., can solve the problem of poor stretchability of PET film, reduced glass heating efficiency, and head impact index. To solve problems such as change, to achieve the effect of suppressing deformation and damage, and suppressing the deviation of glass

Active Publication Date: 2019-11-22
KURARAY EURO GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The bonding glass using the PET film as described in Patent Document 2 has the following problems: two interlayer films are required; therefore, the heating element is located near the center of the bonding glass, and the heating efficiency of the glass is reduced; the curved surface followability of the PET film is poor, Therefore, it cannot be applied to a high-curvature front windshield; PET film has poor stretchability, so the head impact index at the time of impact becomes high; Haze

Method used

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  • Polyvinyl acetal resin film for laminated glass
  • Polyvinyl acetal resin film for laminated glass
  • Polyvinyl acetal resin film for laminated glass

Examples

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Embodiment

[0214] Hereinafter, although an Example demonstrates this invention in more detail, this invention is not limited to the said Example at all.

reference example 1

[0216] Polyvinyl butyral resin 1 (hereinafter referred to as "resin 1") and polyvinyl butyral resin 2 (hereinafter referred to as "resin 2") were mixed at a mass ratio of 75:25 and melt-blended. Refined, extruded in strips, and pelletized. The obtained pellets were melt-extruded with a single-screw extruder and a T-die, and a polyvinyl acetal resin film c having a smooth surface and a thickness of 50 μm was obtained using a metal elastic roll.

[0217]

[0218] Film-forming properties when the pellets were melt-extruded with a single-screw extruder were evaluated according to the following criteria. The results are shown in Table 2.

[0219] AThe film forming property is very favorable.

[0220] B film formation is good.

[0221] C causes coloring and generation of decomposition gas, but film formation is possible.

[0222] D cannot be filmed.

[0223]

[0224] The resins constituting the obtained polyvinyl acetal resin film were analyzed by GPC. In the GPC analysis,...

reference example 5

[0240] UV-curable nano-silver ink was printed on the polyvinyl acetal resin film c by letterpress printing to a thickness of 10 μm to form a linear conductive material pattern with a line width of 300 μm, a pitch of 100 μm, a length of 5 cm, and a number of 20 lines . The aforementioned pattern is irradiated with UV light to cure the ink.

[0241] Next, on glass with a length of 10 cm, a width of 10 cm, and a thickness of 3 mm, the polyvinyl acetal resin film provided with the aforementioned pattern is arranged with the printing surface facing up, so as to be at right angles to the direction of the linear conductive material of the aforementioned pattern. A copper foil tape (width 5 mm, length 15 cm) having a conductive adhesive layer as a bus bar was overlapped with both ends of each linear conductive material. In addition, each bus bar is provided as an electrode so that it may protrude from a polyvinyl acetal resin film. Next, a plasticized polyvinyl acetal resin layer of...

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Abstract

The present invention relates to a polyvinyl acetal resin film for laminated glass, the polyvinyl acetal resin film having a thickness of 10-350 [mu]m, wherein the viscosity of a solution, in which toluene / ethanol=1 / 1 (mass ratio) and the concentration of a polyvinyl acetal resin in a resin composition constituting the polyvinyl acetal resin film is 10 mass%, is 100-1000 mPa*s as measured at 20 DEG C and 30 rpm using a Brookfield-type (B-type) viscometer, the amount of a plasticizer in the polyvinyl acetal resin film is 0-20 mass% on the basis of the total mass of the resin composition constituting the polyvinyl acetal resin film, the average spacing Sm value of recesses and protrusions on at least one surface is at least 500 [mu]m, and the ratio Sm / Rz of the average spacing Sm value of the recesses and protrusions on at least one surface with respect to the ten-point average roughness Rz value is at least 200.

Description

technical field [0001] The present invention relates to a polyvinyl acetal resin film for laminated glass. Moreover, this invention relates to the laminated glass which has the said polyvinyl acetal resin film between several transparent base materials. Background technique [0002] A method of blowing hot air to glass is known as a method of removing freezing and fogging of glass in buildings and vehicles. However, this method has a problem that it takes time to obtain sufficient forward visibility. In addition, in order to prevent failure of cameras and sensors attached to glass such as windshields, it is necessary to heat the surroundings of cameras and sensors to remove icing and fogging. However, for electric vehicles that cannot use the combustion heat of fuel for this removal, the method of heating the air with electricity and blowing hot air on the glass has the problem of inefficiency, which directly leads to a reduction in cruising distance. [0003] Therefore, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C27/12C08L59/00
CPCC08L59/00B32B17/1022B32B17/10761B32B17/10036C08L29/14B32B2307/202B32B2307/412B32B2311/08B32B2311/12B32B2250/02C08K5/0016C08L2205/025B32B17/10587B32B17/10568B32B27/30B32B27/22B32B3/30B32B33/00B32B2605/006C08L2201/10C08L2203/16C08L2205/02
Inventor 矶上宏一郎小石川淳保田浩孝U·凯勒
Owner KURARAY EURO GMBH
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