Curved laminated glass for vehicle and vehicle fixed with the curved laminated glass

A laminated glass, bending technology, applied in glass/slag layered products, vehicle parts, windshields, etc., can solve problems such as increased cost, damage to the appearance of window glass, and less obvious effect of natural vibration of glass, and achieves improvement. Comfort, the effect of improving comfort

Inactive Publication Date: 2007-10-17
NIPPON SHEET GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is necessary to arrange a piezoelectric conversion element and a circuit for controlling the element in the peripheral part of the glass, which has the problem of spoiling the appearance of the window glass and increasing the cost.
[0010] In addition, the method disclosed in the aforementioned Japanese Unexamined Patent Application Publication No. 5-310039 is simple, but the curved shape of the window glass is restricted, and the effect of suppressing the natural vibration of the glass is not so obvious.
[0011] In addition, in the method disclosed in the above-mentioned Japanese Unexamined Patent Publication No. 7-186714, there is a problem that a special supporting structure is required to fix the window glass to the vehicle body.

Method used

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  • Curved laminated glass for vehicle and vehicle fixed with the curved laminated glass
  • Curved laminated glass for vehicle and vehicle fixed with the curved laminated glass
  • Curved laminated glass for vehicle and vehicle fixed with the curved laminated glass

Examples

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Effect test

Embodiment 1

[0038] A resin interlayer with a thickness of 0.76 mm is sandwiched between two glass plates with a thickness of 2.0 mm that have been bent and processed, and laminated glass is produced by heating in an autoclave. The resin intermediate film used is a polyvinyl n-octyl acetal film (a film obtained by acetalizing polyvinyl alcohol with an aldehyde containing n-octyl aldehyde as the main component) between two polyvinyl butyral films. Three-layer structure of resin interlayer film. The measurement results of the Shore hardness measured by the durometer of the resin interlayer film of the laminated glass at 20° C. are indicated by the black square marks in FIG. 3 . The shore hardness at 20°C is 74 degrees, and in the temperature range of 0 to 40°C, the shore hardness changes in the range of 81 to 72 degrees. The hardness of the resin interlayer has a property that it becomes smaller when the temperature is raised, and becomes larger when the temperature is lowered.

[0039] In...

Embodiment 2

[0049] A laminated glass was produced in the same manner as in Example 1 using a polyvinyl acetal monolayer film (thickness 0.76 mm) using n-octaldehyde as a main component as an acetalized aldehyde as a resin intermediate film. The Shore hardness at 20° C. of the resin interlayer was 73 degrees, as indicated by the triangular mark in FIG. 3 . Using this resin interlayer, a laminated glass was produced in the same manner as in Example 1, and the natural vibration characteristics were measured in the same manner as in Example 1. As a result, the natural vibration characteristics were approximately the same as those of the laminated glass in Example 1 in the frequency range of 20 to 500 Hz. Vibration characteristics. Next, an actual car driving test was carried out on an automobile in which the laminated glass was installed as a windshield, and as a result, the continuous large cavity resonance noise (bass resonance noise) was hardly generated during running.

[0050] The lamin...

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Abstract

The invention provides a curve laminated glass without natural vibration in low-frequency area which is below 500 Hz. The curve laminated glass does not resonate with a car body, being installed in the car body. A resin interlayer to join two curve glass plates to form the curve laminated glass is a three layer construction film (sound insulation film) such as a film to clamp a polyvinyl alcohol octyl aldehyde film between polyvinyl butyral (PVB) films, wherein, the Shore hardness is below 75 degrees at 20 DEG C.

Description

technical field [0001] The present invention relates to a curved laminated glass for a vehicle in which low-frequency cavity resonance sound hardly occurs in a running vehicle, and a vehicle equipped with the curved laminated glass. Background technique [0002] Laminated glass in which two glass sheets are bonded together with a resin interlayer is widely used as window glass for vehicles such as automobiles. In recent years, the importance of the front window glass (window shield) having high sound insulation performance is gradually increasing due to the strong demand to improve the comfort related to sound in the vehicle. [0003] In-vehicle noise is a sound that is generated by vibration sound emitted by a drive system such as an engine or a traveling part, etc., by the cavity resonance of the interior space as a resonance space. In particular, diaphragm vibrations that elastically vibrate in large flat-shaped parts such as window glass increase the cavity resonance so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C27/12B32B17/10B60J1/00
CPCB32B17/10036B60J1/02Y10T428/3163B32B17/10761B32B2250/03C03C27/10B32B17/10
Inventor 川口淳下村高弘
Owner NIPPON SHEET GLASS CO LTD
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