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Heat-insulating and noise-reducing nonwoven composite material for automobile interior trim and preparation method thereof

A technology for composite materials and automotive interiors is applied in the field of thermal insulation and sound insulation non-woven automotive interior materials and their preparation. The effect of engineering application value

Active Publication Date: 2011-08-31
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main research and application fields of hollow fibers are still limited to low-end fields such as thermal clothing fabrics (patent publication numbers: CN 2435948Y, CN 1899814A, CN 2388035Y), wadding, elastic fillers, wool-polyester blended fabrics, etc. There are still few high value-added products developed with functional characteristics
Xu Wencai (patent publication number: CN 101643973A) mixed hollow fibers with other fibers and then needled them to prepare non-woven fabrics, but they were only used as sound-absorbing felts in conference rooms, concert halls and other places, and the requirements for material process performance were not high

Method used

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  • Heat-insulating and noise-reducing nonwoven composite material for automobile interior trim and preparation method thereof
  • Heat-insulating and noise-reducing nonwoven composite material for automobile interior trim and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The PP fiber, the PET fiber and the hollow PET fiber are weighed and mixed respectively, and the mixing ratio is 50wt% of the PP fiber, 20wt% of the PET fiber, and 30wt% of the hollow PET fiber.

[0024] After the fibers are preliminarily mixed and opened by the pre-opener, they are sent to the opener for full mixing and opening. as attached figure 1 As shown, the fiber raw material after opening is sent to a carding machine, and the raw fiber is processed into a thin web basically composed of single fibers, and the fibers are straightened in parallel. The four-curtain laying method is adopted, and the thin net is laid on the net curtain for output. Thereafter, the output thin net is sent to a pre-needling machine to be needled into a pre-needled felt. In this example, the surface density of the pre-needled thin felt is 350g / m 2 , and then put the thin mat into the main needling machine for superimposed needling, and continue to superimpose with the pre-needled mat fo...

Embodiment 2

[0028] The PP fiber, the PET fiber and the hollow PET fiber are weighed and mixed respectively, and the mixing ratio is 50wt% of the PP fiber, 10wt% of the PET fiber, and 40wt% of the hollow PET fiber.

[0029] Using the method described in Example 1, the fibers were sequentially mixed and opened, carded and laid into a web, pre-needled, and main needled. In this case, the surface density of the pre-needled felt is 320g / m 2 , the needling pass is 4, and the final surface density is about 1300g / m 2 finished felt.

[0030] Using the method described in Example 1, the above-mentioned fiber mat was subjected to compression molding. The molding parameters selected in this example are: molding temperature 210°C, molding pressure 4MPa, molding time 4min. After cooling, the edges are trimmed into the final product.

[0031] The performance parameters of the product in this example are: flexural strength 3.0MPa, flexural modulus 200MPa, longitudinal and transverse dimensional chang...

Embodiment 3

[0033] The PP fiber, PET fiber and hollow PET fiber are weighed and mixed, and the mixing ratio is 50wt% of PP fiber, 1wt% of PET fiber, and 49wt% of hollow PET fiber.

[0034] Using the method described in Example 1, the fibers were sequentially mixed and opened, carded and laid into a web, pre-needled, and main needled. In this case, the surface density of the pre-needled felt is 330g / m 2 , the needling pass is 3, and the final surface density is about 1000g / m 2 finished felt.

[0035] Using the method described in Example 1, the above-mentioned fiber mat was subjected to compression molding. The molding parameters selected in this example are: molding temperature 160°C, molding pressure 2MPa, molding time 2min. After cooling, the edges are trimmed into the final product.

[0036] The performance parameters of the product in this example are: flexural strength 3.0MPa, flexural modulus 219MPa, longitudinal and transverse dimensional change rates are -0.18% and -0.14% resp...

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Abstract

The invention discloses a heat-insulating and noise-reducing nonwoven composite material for automobile interior trim and a preparation method thereof. The composite material is prepared from certain proportions of PP (polypropylene) fiber, PET (polyester) fiber and hollow PET fiber, the mixed fiber is prepared into a composite felt by a certain acupuncture process, and an appropriate die pressing process is adopted to prepare a composite fiber felt. The composite material disclosed by the invention keeps lower surface density, good bending performance and good dimensional stability, can also meet the functional requirements for heat insulation and sound insulation, and can be used for preparing medium and high-grade automobile interior trim materials.

Description

technical field [0001] The invention relates to the field of composite materials, and relates to a heat-preserving and sound-insulating non-woven automotive interior material which is made of polypropylene (PP) fiber, polyester (PET) fiber and hollow polyester fiber, which is felted and molded by acupuncture technology after mixing, and its preparation method. Background technique [0002] As a new type of composite material, non-woven composite material has been paid more and more attention by automobile manufacturers due to its short process flow, high labor productivity, wide use of raw materials and broad product application fields, and its development momentum is extremely rapid. As a new type of composite material, non-woven needle-punched felt has been used in automotive interior materials through compression molding, and the amount is still increasing. At the same time, with the development of the economy and the improvement of people's living standards, the demand ...

Claims

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Application Information

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IPC IPC(8): B32B27/02D04H1/46B32B37/06B32B37/10
Inventor 陶杰包祖国李华冠雷云龙赵燕琴杨真雄
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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