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Sound absorbing skin material and sound absorbing material utilizing the same

A technology of sound-absorbing properties and sound-absorbing materials, applied in the field of sound-absorbing materials, can solve problems such as weak surface strength, reduced durability of molding shape compliance, fuel saving, and unfavorable weight reduction, and achieve good formability

Active Publication Date: 2013-11-06
NAGOYA OIL CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the workability deteriorates due to the increase in weight, and it becomes disadvantageous in terms of fuel economy and weight reduction when used in automobiles.
In addition, even if paper is used as a material to reduce weight, there are problems with sound absorption performance, and the compliance with molded shapes and durability against unsuitable inlays are reduced.
Specifically, the invention of the above-mentioned Patent Document 1 continuously changes the airflow resistance value of one surface layer of the felt and the opposite surface layer by the difference in the coating amount of the binder resin, but the weight is as high as 1500 g / m 2
In addition, in the invention of the above-mentioned Patent Document 2, the interior material reaches 1750 g / m 2 the weight of
In addition, in the invention of the above-mentioned Patent Document 3, although the weight has been reduced, there is a problem that the surface strength is weak because the foam layer becomes the surface.

Method used

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  • Sound absorbing skin material and sound absorbing material utilizing the same
  • Sound absorbing skin material and sound absorbing material utilizing the same
  • Sound absorbing skin material and sound absorbing material utilizing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0117] The weight per unit area made of polyester fiber by needle punching method is 80g / m 2 The back of the fiber sheet, according to the coating amount to reach 15g / m 2 After spraying a hot-melt adhesive made of hot-melt polyamide (melting point: 130°C), crepe paper made of 60% by mass softwood pulp and 40% by mass hardwood pulp was laminated on the fiber sheet. On the coated surface of the hot melt adhesive, the laminate is pressed with a hot roller with a surface temperature adjusted at 140-150°C, and then pressed with a cold and hot roller to obtain a crepe-processed A sound-absorbing surface material composed of a laminate of paper and fiber sheets. As the above-mentioned creped paper, four types of creped paper shown below were used.

[0118] 1: The wrinkle rate is 15%, and the weight per unit area is 15g / m 2

[0119] 2: The wrinkle rate is 15%, and the weight per unit area is 40g / m 2

[0120] 3: The wrinkle rate is 30%, and the weight per unit area is 15g / m 2

...

Embodiment 2

[0124] The creped paper in Example 1 was replaced with embossed paper to obtain a sound-absorbing surface material and a sound-absorbing material. In addition, as a sound-absorbing performance test, a 10-mm-thick flat-shaped sound-absorbing material was molded at the same time. As the above-mentioned embossed paper, four kinds of embossed papers shown below were used.

[0125] 1: The protrusion height is 0.2mm, and the number of protrusions is 150 / cm 2 , and the weight per unit area is 15g / m 2

[0126] 2: The protrusion height is 0.2mm, and the number of protrusions is 150 / cm 2 , and the weight per unit area is 40g / m 2

[0127] 3: The protrusion height is 1.5mm, and the number of protrusions is 20 / cm 2 , and the weight per unit area is 15g / m 2

[0128] 4: The protrusion height is 1.5mm, and the number of protrusions is 20 / cm 2 , and the weight per unit area is 40g / m 2

Embodiment 3

[0168] Use polyester fibers and made by needle punching with a weight per unit area of ​​70g / m 2 Fiber sheet, and according to the coating amount up to 10g / m 2 After spraying a hot-melt adhesive made of hot-melt polyester (melting point: 130° C.) on one side of the fiber sheet, a fiber sheet made of 80% by mass of softwood pulp and 20% by mass of hardwood pulp was sprayed. Crepe processed paper (crepe rate: 30%, weight per unit area: 20g / m 2 ) is laminated on the surface coated with the hot melt adhesive, and after being laminated with a hot roller whose surface temperature is adjusted to 140-150°C, it is laminated with a cooling roller, thereby bonding the creped paper to the fiber sheet superior. Next, 40 parts by mass of acrylate / methacrylate copolymer emulsion (solid content: 40%, MFT (film forming temperature): 4°C), 20 parts by mass of copolymerized polyester as a hot-melt adhesive A mixed solution composed of resin (melting point: 110°C, particle size: 100-150μm), 40...

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Abstract

A lightweight sound absorbing surface material, having an excellent sound absorbing property and moldability, and a sound absorbing material using the sound absorbing surface material, are provided in the present invention. The sound absorbing surface material 6 is manufactured by laminating stretchable paper(s) which is (are) creped and / or embossed (such as a creped paper 1b) onto one or both sides of a fiber sheet 3. The degree of creping of the paper is in the range of between 10 and 50 %, and the height of projections of the embossed paper is in the range of between 0.02 and 2.00 mm, with the number of the projections being in the range of between 20 and 200 projections / cm 2 . Further, the sound absorbing surface material 6 is laminated onto a air permeable sheet of porous material 7, to manufacture a sound absorbing material 8.

Description

technical field [0001] The present invention relates to sound-absorbing surface materials such as automobile floor materials and house wall materials, and sound-absorbing materials using the sound-absorbing surface materials. Background technique [0002] In recent years, due to problems such as petroleum resources and global warming, especially in the automobile industry, improving fuel combustion efficiency has become an urgent issue to be solved. Furthermore, on the other hand, in order to improve the performance of automobiles, it is necessary to take sound-proof measures for the interior and exterior of automobiles, and various sound-absorbing materials have been proposed. On the other hand, the above-mentioned sound-absorbing material is generally used by laminating a sound-absorbing skin material on a base material, and molding this laminated product appropriately. [0003] As a general skin material, a fiber sheet such as a nonwoven fabric, or a porous material such...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B29/02B60R13/08E04B1/86G10K11/16
CPCB32B29/02B60R13/083B32B29/08B32B29/06G10K11/168B32B5/022B32B5/024B32B5/026B32B5/08B32B5/18B32B7/12B32B29/007B32B2255/10B32B2255/102B32B2255/12B32B2255/26B32B2260/021B32B2260/028B32B2260/046B32B2262/02B32B2262/0238B32B2262/0246B32B2262/0253B32B2262/0261B32B2262/0269B32B2262/0276B32B2262/0292B32B2262/04B32B2262/06B32B2262/10B32B2262/12B32B2262/14B32B2266/02B32B2266/0228B32B2266/0235B32B2266/025B32B2266/0271B32B2266/0278B32B2266/0285B32B2307/102B32B2307/306B32B2307/718B32B2307/724B32B2471/04B32B2605/00B32B2607/00
Inventor 小川正则藤井慎水谷直弘
Owner NAGOYA OIL CHEM CO LTD
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