Polyurethane anechoic tile product and preparation method thereof

A technology of polyurethane and anechoic tiles, which is applied in the application fields of new underwater sound-absorbing materials, acoustic stealth materials and products, and can solve problems such as increasing the area of ​​a single tile, many tile-to-tile joints, and manufacturing process bottlenecks. Achieve the effect of reducing the probability of stress cracking, reducing the number of joints, and reducing the probability of corrosion

Inactive Publication Date: 2014-09-03
上海瑞义聚氨酯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Problems existing in actual use of existing rubber anechoic tiles: the area of ​​a single anechoic tile is relatively small, and there are many connection seams between tiles during the entire anechoic tile application process, and the connection seams are relatively small. The seam gap is relatively large; and the area of ​​a single tile needs to be increased in design. Due to the limitation of the porous acoustic cavity structure in the anechoic tile, there is a bottleneck in the manufacturing process in the implementation of the rubber molding process.
[0004] There are two defects in the application of underwater sound absorption technology to the connection seam between sound-absorbing tiles: the connection seam is sealed with polysulfide glue, and there is no porous acoustic cavity structure, which basically does not have sound absorption function; at the same time, the connection seam is bent and deformed For thick rubber semi-rigid products, the stress concentration at both ends is relatively large at the edge of the mating surface. Once it is hit by an external force, it is easy to crack; once cracked, sea water will penetrate in, directly corroding the ship's shell and shortening the ship. service life
[0006] Check the related anechoic tile patents, there is no similar material technology and molding process application report

Method used

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  • Polyurethane anechoic tile product and preparation method thereof
  • Polyurethane anechoic tile product and preparation method thereof
  • Polyurethane anechoic tile product and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of polyurethane casting raw materials:

[0029]

[0030] Preparation of component C: mix one part of polyurethane color paste with two parts of polyether glycol to prepare 5.5%

[0031] Preparation of pouring raw materials: put the raw material MDI isocyanate in Table 3 into a 500-liter polymerization reactor after weighing according to the feeding amount, and adopt the polyol polyether metering and dropping pre-polymerization process; The time is 1.5~2.0hr, the holding temperature is controlled at 75~80°C, and the holding time is 2.0hr, and the prepolymer with isocyanate content of 7.65% and viscosity ≤3500cps can be prepared; add additives and disperse in a high-speed disperser to make component A , and set aside after filtering. Put the amino-terminated polyether, polyol polyether, polyaminoamine chain extender, catalyst, etc. in Table 4 into a 400-liter batching tank according to the amount of feed, and under high-speed dispersion conditions, the mix...

Embodiment 2

[0042] Preparation of polyurethane casting raw materials:

[0043]

[0044] Preparation of component C: mix one part of polyurethane color paste with two parts of polyether glycol to prepare 5.5%

[0045] The entire implementation process of embodiment 2 is the same as that of embodiment 1, and will not be described again; only the material formula is somewhat different, and the material performance test data is also somewhat different, which will be listed later.

[0046] The present invention adopts the above-mentioned preparation method, and the material mechanical properties and sound-absorbing properties of polyurethane sound-absorbing tiles can be reflected as follows:

[0047] project Tensile Strength Elongation hardness low temperature brittleness Performance ≥22MPa ≥220％ 64 Shao D No cracking at -30℃

[0048] sound frequency 1-4KHz 5-12KHz 13-24KHz Polyurethane sound-absorbing tile Pressure 0-2MPa 70 87 ...

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Abstract

The invention introduces a polyurethane anechoic tile product and a preparation method thereof. A thick plate of a polyurethane anechoic tile is prepared into a slabbed construction which is 40-60mm thick with a vocal tract hole structure and the size can be determined according to the size of a die. The tile can be prepared by simulating 10 times of the area of the existing acoustic tile, so that the single tile area of the anechoic tile is effectively improved, the joint of the anechoic tile is effectively reduced and the damage probability of the anechoic tile is effectively reduced. The polyurethane anechoic tile prepared by the preparation method realizes the material performance and the water acoustic absorption performance of the existing rubber anechoic tile and is technically probable of replacing original rubber anechoic tile. The tile is the invention which is suitable for the technical field of coating anechoic tiles outside ships and has an actual application value.

Description

Technical field: [0001] The invention relates to a technology in the field of new underwater sound-absorbing material products, specifically, it is an acoustic stealth material and product application field suitable for diving ships and underwater detectors with high-performance sound-absorbing requirements. Background technique: [0002] Anechoic tiles are a very obvious control measure for underwater mobile ship control and noise reduction; at the same time, it is also the most effective method to reduce ship external noise, and this method is currently used internationally and domestically. The noise reduction principle of the anechoic tile is to match the impedance between the underwater sound source and the seawater, so that the sound wave can be converted and absorbed in the sound energy in the anechoic tile, and the damping effect of the elastic material of the anechoic tile and the inner surface of the anechoic tile The structure of the sound hole cone cavity coopera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/50C08G18/48C08G18/32C08L75/08
CPCC08G18/12C08G18/4804C08G18/482C08G2350/00C08G18/6685
Inventor 柴华敏丁雄姚中恒钱学伟朱守御吴剑晴
Owner 上海瑞义聚氨酯科技有限公司
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