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Process for producing heat-expandable base for interior vehicular trim and process for producing base for interior vehicular trim from the same

A thermal expansion, matrix material technology, used in vehicle parts, transportation and packaging, textiles and papermaking, etc., can solve the problems of complicated operation, complicated process, unoptimized cost, scattering, etc., and achieve the effect of light weight

Active Publication Date: 2010-08-18
NAKAGAWA SANGYO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the method of forming the base material described in Patent Document 1, there is a problem of scattering of microcapsules whose specific gravity becomes smaller after thermal expansion (for example, after thermal expansion, the specific gravity becomes about 1 / 50 of that before thermal expansion).
In addition, in the production method described in Patent Document 2, the mesh is produced by papermaking, but in this production method, a device with a complicated structure is required, and the operation and process are also very complicated.
In addition, since an expensive foam solution prepared by mixing a surfactant and dispersing reinforcing fibers, heat-expandable powder, etc. is used, it is not preferable in terms of cost.

Method used

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  • Process for producing heat-expandable base for interior vehicular trim and process for producing base for interior vehicular trim from the same
  • Process for producing heat-expandable base for interior vehicular trim and process for producing base for interior vehicular trim from the same
  • Process for producing heat-expandable base for interior vehicular trim and process for producing base for interior vehicular trim from the same

Examples

Experimental program
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Effect test

Embodiment 1

[0071] Example 1 (Manufacture of Thermally Expandable Base Material for Vehicle Interior)

[0072] (1) Production of glass fiber mat (inorganic fiber mat)

[0073] Cut the glass fiber wound into a roving shape into a predetermined length, open it with a fiber opening drum to make a cotton-like glass fiber, place the glass fiber in the air flow, and make it the weight per unit area (fiber density) 280g / m 2 Floating and stacking in the same way to make a glass fiber mat with a thickness of 4.1mm.

[0074] (2) Preparation of mixed emulsion

[0075] 300 liters of water and 6 liters of surfactant were put into a container with a capacity of 600 liters, and stirred and mixed. Afterwards, 84 liters of dispersions containing 45.7 mass % of high-density polyethylene powder (the fusing point of high-density polyethylene is 147 DEG C) emulsion, 30 liters of dispersions containing 20.5 mass % of heat-expandable microcapsules (thermal expansion start temperature) in this container 178°...

Embodiment 2

[0078] Example 2 (base material for vehicle interior)

[0079] The thermally expandable base material for vehicle interior produced in Example 1 was left to stand in a heating furnace whose temperature was adjusted to 230° C. for 90 seconds. Thereby, the surface temperature of the heat-expandable base material for vehicle interior became 195° C. (17° C. higher than the thermal expansion start temperature of the heat-expandable microcapsules), and the heat-expandable microcapsules were thermally expanded. Afterwards, the heat-expandable base material for vehicle interior was cooled by a cold press to manufacture a base material for vehicle interior with a thickness of 8 mm. The gap between the cooling plates of the above-mentioned cold press was 8 mm, and water circulated inside the cooling plates, and the cooling plate was cooled. The temperature of the press was set at 18°C.

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Abstract

A process for producing a heat-expandable base for interior vehicular trim is provided which is for use in producing an interior vehicular trim material which is lightweight and has sufficient sound-absorbing properties, high rigidity, etc. Also provided is a process for producing a base for interior vehicular trim. The process for producing a heat-expandable base for interior vehicular trim is characterized by mixing an emulsion of a synthetic resin with an emulsion of heat-expandable microcapsules and an emulsion of a resinous adhesive, infiltrating the emulsion mixture into an inorganic fibrous mat, thereafter drying the mat at a temperature in a range of temperatures lower than the heat expansion initiation temperature of the microcapsules, subsequently heating the mat at a temperature in a range of temperatures at which the synthetic resin powder melts and which are lower than the heat expansion initiation temperature of the microcapsules, hot-pressing the mat, and then cooling the mat. The process for producing a base for interior vehicular trim is characterized by heating the heat-expandable base for interior vehicular trim at a temperature exceeding the heat expansion initiation temperature of the microcapsules and then cooling the base.

Description

technical field [0001] The present invention relates to a method for producing a thermally expandable base material for vehicle interiors and a method for producing a base material for vehicle interiors using the thermally expandable base material. More specifically, the present invention relates to a method of manufacturing a thermally expandable base material for vehicle interior capable of producing a material for vehicle interior that is light in weight and has sufficient sound absorption and high rigidity, and a method of using the thermally expandable base material for vehicle interior. A method for producing a base material for vehicle interiors. Background technique [0002] In the past, as the vehicle interior base material, the following base material for vehicle interior was used. The base material for vehicle interior was mixed and accumulated with inorganic fibers and resin fibers, and needle-punched to form a mat. After that, resin The mat is heated at the tem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C44/00B32B5/18B60R13/02C08J5/04
CPCB29C44/1209C08J9/32B60R13/08C08J9/0085B29C44/32B29C70/66B60R13/02D06M23/12B29C44/332B29C44/08B29K2105/251B29C44/3484B29K2105/0076B29K2023/06B29C44/5636B29K2105/08B29K2105/12B29C44/5627
Inventor 中川幸弘中川敬章高桥吾朗坂本达夫
Owner NAKAGAWA SANGYO
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