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 func

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

Example Embodiment

[0022] Example 1

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

[0024] After the fiber is initially mixed and opened by the pre-opener, it is sent to the opener for sufficient mixing and opening. as attached figure 1 As shown, the open fiber feedstock is fed into a carding machine, where the feedstock fibers are processed into a thin web consisting essentially of single fibers and the fibers are straightened in parallel. The four-curtain lay-up method is adopted, and the thin net is laid on the net curtain for output. After that, the output thin web is sent to the pre-needling machine, and it is needle-punched into a pre-needle felt. In this example, the pre-needled felt has a surface density of 350g / m2. 2 , and then the thin felt is superimposed and sent to the main needling machine for superimposed needling, and continues to be ...

Example Embodiment

[0027] Example 2

[0028] PP fiber, PET fiber and hollow PET fiber were weighed and mixed respectively, and the mixing ratio was 50 wt % of PP fiber, 10 wt % of PET fiber, and 40 wt % of 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-needed. The surface density of the pre-needled felt in this example is 320g / m2 2 , the needling pass is 4, and the final areal density is about 1300g / m 2 of finished felt.

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

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

Example Embodiment

[0032] Example 3

[0033] PP fiber, PET fiber and hollow PET fiber were weighed and mixed, and the mixing ratio was 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-needed. The surface density of the pre-needled felt in this example is 330g / m2 2 , the needling pass is 3, and the final areal density is about 1000g / m 2 of finished felt.

[0035] Using the method described in Example 1, the above-mentioned fiber mat is molded. The molding parameters selected in this example are: molding temperature 160° C., molding pressure 2 MPa, and molding time 2 min. 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 of -0.18% and -0.14%, ...

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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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