Sound-insulation PVB photographic film and preparation method thereof
A film and modification technology, used in chemical instruments and methods, layered products, glass/slag layered products, etc., can solve problems such as processing difficulties, reducing hydroxyl content, and difficulty in forming films with uniform thickness and uniform thickness. Uneven problem, avoid powder pollution, improve the effect of sound insulation
Active Publication Date: 2017-03-29
ZHEJIANG DECENT PLASTIC
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Problems solved by technology
However, improving the PVB resin structure, increasing the content of butyraldehyde groups, reducing the content of hydroxyl groups, or increasing the proportion of plasticizers 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
Method used
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Embodiment 7
[0078] Get the modified PVB resin powder 72kg of embodiment 1, plasticizer 3G8 altogether 28kg, plasticize at the temperature of 160 ℃ by 52 type twin-screw extruders, the middle B module of plasticized resin import three-layer mould; 72kg of modified PVB resin powder in Example 5, and a total of 28kg of plasticizer 3G8 were plasticized at a temperature of 160°C by a 95-type twin-screw extruder, and then introduced into the outer layers A and C of the three-layer mold after plasticization. The PVB film with sound insulation performance is obtained by extruding into a film through a three-layer die.
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Abstract
The invention relates to a sound-insulation PVB photographic film and a preparation method thereof. The sound-insulation PVB photographic film is formed by compounding three layers of films A, B and C, wherein the thickness of the middle-layer film B is 100-200 microns, the thickness of the film A outside the film B is 300-500 microns, and the thickness of the film C outside the film B is 300-500 microns; and the middle-layer film B is prepared from modified PVB resin powder with a fusion index of 6g/10min-10g/10min, and the film A and the film C are prepared from modified PVB resin powder with a fusion index of 4g/min-5g/10min. The prepared three-layer sound-insulation PVB photographic film is capable of effectively blocking noise within in a human ear-sensitive range of 1000Hz-4000Hz, and compared with PVB with a conventional thickness, the sound-insulation effect can be increased by 3dB-5dB.
Description
technical field [0001] The invention relates to a sound-insulating PVB film, which belongs to the application field of sound-insulating adhesive glass. Background technique [0002] Sound is a vibration wave, and the frequency to which the human ear is particularly sensitive is 1000-4000 Hz. End customers in the field of glass applications are paying more and more attention to noise reduction in automobiles and architectural glass, and they are also focusing on safety factors, because noise pollution affects people's working environment and comfort. [0003] In the past, people usually used solid or a large number of product design elements to increase the thickness of the glass to improve the sound insulation performance of the glass. However, as people pay more and more attention to environmental issues, the limitations of glass design, there are certain restrictions on increasing the thickness and hardness, " "Green and environmental protection" has also become the prima...
Claims
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Patent Timeline
Login to view more IPC IPC(8): C08L29/14C08K13/02C08K5/098C08K3/22C08K5/103B32B27/08B32B27/20B32B27/42B32B17/10
CPCB32B17/1055B32B27/08B32B27/20B32B27/42B32B2250/03B32B2250/24B32B2307/102C08J5/18C08J2329/14C08K3/22C08K5/098C08K5/103C08K13/02C08K2003/2258C08K2201/011C08K2201/014C08L2201/08C08L2203/16C08L29/14
Inventor 谢怀玉陈庚许忠明叶卫民朱立疆蔡海堤王强项舒武金晓光
Owner ZHEJIANG DECENT PLASTIC
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