Intermediate film for laminated glass and laminated glass

A technology of laminated glass and interlayer film, which is applied in the direction of glass/slag layered products, windshields, layered products, etc. It can solve the problems of reduced sound insulation, inability to fully obtain sound insulation, low sound insulation, etc., and achieve improved sound insulation sexual effect

Active Publication Date: 2013-06-05
SEKISUI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the thickness of the laminated glass is thinned, the sound insulation performance will decrease
When laminated glass with low sound insulation is used for windshields of automobiles, etc., there is a problem that sound insulation cannot be sufficiently obtained against sounds in the range of about 5000 Hz, such as wind cutting noise and wiper driving sound.

Method used

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  • Intermediate film for laminated glass and laminated glass
  • Intermediate film for laminated glass and laminated glass
  • Intermediate film for laminated glass and laminated glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0170] (1) Production of interlayer film

[0171] 100 parts by weight of the polyvinyl acetal resin a and 60 parts by weight of the plasticizer (3GO) were sufficiently kneaded with a mixing roll to obtain a composition for an intermediate layer.

[0172] The obtained composition for an intermediate layer was sandwiched between two fluororesin sheets through a gap plate (clearance plate) having the thickness of the obtained intermediate layer A, and press-molded at 150° C. to obtain an intermediate layer A having a thickness of 70 μm.

[0173] 100 parts by weight of polyvinyl acetal resin c and 40 parts by weight of a plasticizer (3GO) were fully kneaded to obtain a composition for a protective layer.

[0174] The obtained protective layer composition was sandwiched between two fluororesin sheets through a gap plate having the thickness of the obtained protective layer B, and press-molded at 150° C. to obtain two protective layers B with a thickness of 350 μm.

[0175] The prote...

Embodiment 2～23 and comparative example 1

[0182] The types and contents of the polyvinyl acetal resin and plasticizer used in the intermediate layer A and protective layer B, and the thicknesses of the intermediate layer A and protective layer B were set as shown in Tables 1, 2, and 5 below. Except for this, in the same manner as in Example 1, a multilayer interlayer film and laminated glass were obtained.

[0183] (Evaluation)

[0184] (1) Loss factor

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Abstract

The present invention aims to provide an intermediate film for laminated glass which, in the case of being used for constituting a laminated glass, enables to improve the sound-insulating property in a high frequency range of the obtained laminated glass over a wide range of temperature. The intermediate film for laminated glass of the present invention 1 has a structure that a first layer 2, a second layer 3, and a third layer 4 are laminated in this order, each of the first, second, and third layers 2, 3, and 4 contains a polyvinyl acetal resin and a plasticizer, the hydroxy group content in the polyvinyl acetal resin contained in the first layer 2 is lower than each of the hydroxy group contents in the polyvinyl acetal resins contained in the second and third layers 3 and 4, and the ratio (T1 / (T2+T3)) of the thickness (T1) of the first layer 2 to the total thickness (T2+T3); of the second and third layers 3 and 4 is 0.14 or lower.

Description

technical field [0001] The present invention relates to an interlayer film for laminated glass that can be used for laminated glass of automobiles and buildings, and more specifically, to an interlayer film for laminated glass containing polyvinyl acetal resin and a plasticizer, and an interlayer film for laminated glass using the same. Laminated glass with interlayer film. Background technique [0002] Even when laminated glass is damaged by external impact, the amount of glass fragments scattered is small, and it is excellent in safety. Therefore, the above-mentioned laminated glass has been widely used in automobiles, rail vehicles, airplanes, ships and buildings. The above-mentioned laminated glass is produced by sandwiching an interlayer film between a pair of glass plates. [0003] In recent years, in order to reduce the weight of laminated glass, research has been conducted on reducing the thickness of laminated glass. However, when the thickness of the laminated g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C27/12B32B17/10B32B27/22B32B27/30B60J1/00C08L29/14
CPCB60J3/007C08L29/14B32B2605/08B32B17/10036B32B2605/10B32B2605/18B32B7/02B32B2605/12B32B17/10605C08K5/0016B32B17/10761B32B2307/102B32B2419/00B32B17/1055B32B27/08B32B27/22B32B27/42C08K5/103C08L2203/16B32B2250/03Y10T428/2495C08L71/02
Inventor 松田匠太岛本伦男梁信烈可儿孝平岩本达矢
Owner SEKISUI CHEM CO LTD
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