A kind of pvb sound insulation laminated glass and preparation method thereof

Abstract

The invention relates to sound insulating glass and a preparation method thereof, in particular to sound insulating PVB (polyvinyl butyral) laminated glass and a preparation method thereof. The sound insulating PVB laminated glass comprises a first glass substrate, a second glass substrate, a PVB film between the first glass substrate and the second glass substrate as well as polystyrene films located between the first glass substrate and the PVB film as well as between the second glass substrate and the PVB film, wherein the first glass substrate and the second glass substrate are arranged vertically. The preparation method of the sound insulating PVB laminated glass comprises the following steps: (1) cleaning of the glass substrate; (2) preparation of the polystyrene films; (3) combining operation: the PVB film is arranged in a combining chamber for combination of the glass substrates, the PVB film and the polystyrene films; (4) prepressing for exhausting; (5) high-pressure molding. The prepared PVB laminated glass has good mechanical property, impact resistance and good sound insulating effect, the PVB film cannot fall off the glass when the laminated glass meets external impact or the external environmental temperature changes acutely, and the service life is long.

Description

technical field [0001] The invention relates to a sound-insulating glass and a preparation method thereof, in particular to a PVB sound-insulation laminated glass and a preparation method thereof. Background technique [0002] Polyvinyl butyral (PVB) film is used as the interlayer of laminated glass to prevent the glass from splashing and peeling off when the glass is broken. PVB laminated glass has high safety performance and has been widely used in the fields of construction and automobiles. In response to this need, US Pat. No. 5,340,654 proposes a multilayer system in which one layer contains PVB with a vinyl acetate content of 8%-30% and the second layer contains PVB with a vinyl acetate content of less than 4%. It also pointed out that PVB with a vinyl acetate content of less than 8% is not suitable for sound insulation. Chinese patent CN200910159694.2 discloses a PVB multilayer film composed of at least two sub-films with sound insulation properties, wherein the fir...

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Problems solved by technology

However, improving the PVB resin structure, increasing the acetyl group content, reducing the hydroxyl content, or increasing the plasticizer ratio to adjust the mechanical loss factor of different PVB layers will have the following risks: the mechanical properties of the film will decrease, the aging performance will decrease, and the plasticizer Precipitation, etc.

[0003] Nowadays, PVB sound-insulating laminated glass is commonly used. The PVB film is directly placed between two glass substrates. The thermal expansion coefficient of the PVB film and the glass substrate is different. When the external environment temperature changes sharply, the shrinkage of the PVB film and the glass substrate is inconsistent. , There is a gap between the PVB film and the glass substrate, and even the PVB film will wrinkle, which will affect the service life of the PVB soundproof glass

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