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Vehicle interior material and manufacturing method thereof

A technology for interior materials and manufacturing methods, applied in the field of interior materials for vehicles, can solve the problems that the sound blocking performance cannot be improved so much, the air permeability adjustment film becomes hard, and the sound absorption is deteriorated, and the sound blocking and sound absorbing properties are achieved. Superior performance, improved sound resistance, and satisfactory suction performance

Active Publication Date: 2019-07-09
HIROTANI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, if the thickness of the sound-insulating material is thickened, the sound-insulating performance can be improved to a certain extent, but the sound-insulating performance cannot be improved so much
In addition, in order to increase the air resistance of the air-permeable adjustment film, if the temperature or pressure at the time of pressurization is increased, the sound resistance performance will be improved, but the air-permeable adjustment film will become hard and difficult to mold, and there is a problem that it cannot be molded on a vehicle interior material.
In addition, if heated at a high temperature or for a long time, the air-permeable adjusting film becomes an air-impermeable film, and as a result, there is a problem that resonance occurs in a predetermined frequency band and the sound-absorbing property deteriorates.

Method used

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  • Vehicle interior material and manufacturing method thereof
  • Vehicle interior material and manufacturing method thereof
  • Vehicle interior material and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0157] Ultrafine fiber A made of 60% by mass of PET fibers with a fineness of 0.8dtex 2 , 25% by mass of PET fibers with a denier of 2.2dtex are heat-fusible fibers B 2 And 15% by mass of PET fiber with a fineness of 2.2dtex, the additional short fiber C 2 Mix and stir, and make the thickness of 50.0mm and the weight of 1,200g / m on the carding machine 2 The sheet material Y 1 . In addition, by lightly pressurizing (for example, at 1kgf / cm 2 compressed), sanded to a manageable degree.

[0158] The sheet material Y 1 Put it into a heating furnace and heat it (heating temperature: about 160°C, heating time: 30 seconds) into a state that is easy to shape to manufacture a heating sheet Y 3 . The heating sheet Y3 With a molding die K 1 Compression with a gap of 2.4mm to produce a primary molded body Y 4 , and cooled naturally.

[0159] Ultrafine fiber A made of 60% by mass of PET fibers with a fineness of 0.8dtex 1 , 25% by mass of PET fibers with a denier of 2.2dtex are ...

Embodiment 2～10

[0163] Examples 2-10 Compared with Example 1, the primary molded body Y 4 and Warming SheetsX 3 The grammage and thickness are different, and others are the same as in Example 1.

Embodiment 11

[0173] Example 11 is an ultrafine fiber A composed of 60% by mass of PET fibers with a fineness of 0.8dtex 1 , 25% by mass of PET fibers with a denier of 2.2dtex are heat-fusible fibers B 1 And 15% by mass of PET fiber with a fineness of 2.2dtex, the additional short fiber C 1 Mix and stir, and make thickness 50.0mm, grammage 1400g / m on the carding machine 2 Sheet MaterialsX 1 . And, by slightly pressurizing (for example, at 1kgf / cm 2 Compressed), frosted (roughened) to a manageable degree.

[0174] The sheet material X 1 Sheet X formed with an air-permeable adjustment film was produced by passing between rolls at an interval of 10.0 mm 2 . With regard to the roller, the surface on one side was heated to 160° C., and the other side was kept at normal temperature, and passed at a speed of 5 cm / sec of the number of rotations of the roller. And, the thickness is roughly restored to 50.0mm.

[0175] In addition, 60% by mass of PET fibers with a fineness of 0.8dtex constit...

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Abstract

OBJECT. To provide a method for producing a lightweight sound insulation material with excellent sound absorption performance and sound insulation performance. MEANS OF SOLVING THE PROBLEM. A formed product G for vehicles which has a predetermined shape is produced by integrally forming a first sheet-like material X1 and a second sheet-like material Y1, the first sheet-like material X1 being made of a first fiber body produced by intertwining 40 to 75 wt% of fibers A1 mainly comprised of microfibers having a fineness of 0.1 to 1.0 dtex, 15 to 60 wt% of fibers B1 mainly comprised of thermal adhesive fibers having a fineness of 1.2 to 5.0 dtex, and O to 20 wt% of fibers C1 mainly comprised of short fibers having a fineness of 1.2 to 5.0 dtex. The sheet-like materials XL, Y1 are prepared, and the second sheet-like material Y1 is heated and pressed with a primary forming die to produce a primary formed body Y4. The primary formed body Y4 and the sheet-like material X1 are placed in a secondary forming die and are compressed and formed with the secondary forming die so that the primary formed body Y 4 and the sheet-like material Xl are formed integrally, whereby the formed product G for vehicles which has the predetermined shape is produced.

Description

technical field [0001] The present invention relates to a vehicle interior material with light weight, good sound absorption performance and sound resistance performance, and a manufacturing method thereof. Background technique [0002] Generally speaking, the noise level in the cabin is greatly affected by engine sound, intake and exhaust sound, road noise, wind noise, and low-frequency noise caused by engine vibration or torque fluctuations. The transmission path of noise is most affected by the transmitted sound from the engine and the partition wall (instrument panel) in the vehicle compartment, and it is said that it accounts for more than 50% of the whole. [0003] Therefore, conventionally, this part has been regarded as the most important part for reducing the noise level in the vehicle cabin, and various companies have devoted themselves to improving the sound insulation performance (sound absorption, sound resistance). In the present invention, performance having ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60R13/08B32B33/00
CPCB32B33/00B32B2307/102B32B2307/724B32B2605/003B60R13/0815
Inventor 梶原雄平手岛宏昭大作直也织田琢也片山敬基
Owner HIROTANI CO LTD