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Polyurethane three-dimensional reinforced GMT (glass fiber mat reinforced thermoplastics) composite board and preparation method thereof

A composite board and polyurethane technology, which is applied in the field of fiber-reinforced thermoplastic resin composite materials, can solve the problems of large amount of hot-melt fibers, high cost, and contradictory mechanical properties, and achieve the goals of reducing material quality, improving sound-absorbing performance, and improving mechanical properties. Effect

Inactive Publication Date: 2019-05-31
浙江华江科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current domestic GMT products still have the following problems: GMT sheets mainly use hot-melt fibers to reinforce glass fibers, which consume a large amount of hot-melt fibers and are costly, making it impossible to further achieve ultra-lightweight; GMT sheets have obvious orientation and anisotropic mechanical properties ; The NVH (sound absorption, air permeability) of the GMT sheet is contradictory to its mechanical properties, etc.
[0003] For the above problems, GMT products can no longer meet the performance of light weight, high strength and high sound absorption at the same time. Compared with imported GMT products, the overall performance is poor

Method used

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  • Polyurethane three-dimensional reinforced GMT (glass fiber mat reinforced thermoplastics) composite board and preparation method thereof
  • Polyurethane three-dimensional reinforced GMT (glass fiber mat reinforced thermoplastics) composite board and preparation method thereof
  • Polyurethane three-dimensional reinforced GMT (glass fiber mat reinforced thermoplastics) composite board and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Select different thicknesses and weights of felts to test the uniformity of the PU foaming solution (due to the uniformity of the test, the final product does not need to enter the composite machine for foaming), the specific plan is as follows:

[0029] The preferred ratio of raw materials is selected as follows:

[0030] 1. The mass fraction of GMT felt accounts for 70% of the whole material. GMT felt is mainly composed of 60% polypropylene fiber by mass fraction and 40% glass fiber by mass fraction. The weight of GMT felt is 700g / m 2 , The thickness is 2, 3, 10, 20, 21mm respectively.

[0031] 2. The mass fraction of GMT felt is 70% of the whole material. GMT felt is mainly composed of 60% polypropylene fiber and 40% glass fiber. The thickness of GMT felt is 6mm, and the weight is 150, 200, 2000, 3000, 3100g / m 2 .

[0032] The semi-rigid foam foaming liquid accounts for 30% of the mass fraction of the whole material. The delay catalyst content in material A is 0, ...

Embodiment 2

[0040] Select different ratios of GMT and PU foaming liquid to test the effect of introducing process and uniformity of PU foaming liquid (due to the uniformity effect of the test, the final product does not need to enter the composite machine for foaming), the specific plan is as follows:

[0041] The preferred ratio of raw materials is selected as follows:

[0042] The mass fractions of GMT felt in the entire material are 19%, 20%, 50%, 90%, and 91% respectively; GMT felt is mainly composed of 60% polypropylene fiber and 40% glass fiber by mass fraction, and the weight of GMT felt is 1000g / m 2 , and the thickness is 10mm respectively.

[0043] The mass fraction of the corresponding high-resilience foaming liquid is 81%, 80%, 50%, 10%, and 9%, wherein the delay catalyst content in material A is 0, and the additive content is 0. Material A includes polyether polyol, crosslinking agent, foaming agent, foam stabilizer, and auxiliary agent, and material B includes isocyanate. ...

Embodiment 3

[0049] The selection of raw material ratio is as follows: GMT composite board includes GMT felt and PU foaming liquid as the base. The mass fraction of GMT felt is 70% of the whole material. GMT felt is mainly composed of 60% polypropylene fiber and 40% glass fiber. The thickness of GMT felt is 6mm, and the weight is 700g / m 2 . The mass fraction of the hard foam foaming liquid in the whole material is 30%. The delay catalyst content in material A is 0, and the additive content is 0. Material A includes polyether polyol, crosslinking agent, foaming agent, foam stabilizer, and auxiliary agent, and material B includes isocyanate.

[0050] The preferred preparation method is as follows: mix hard foam material A and material B in the mixing chamber of material A and material B at a ratio of 1:2.7, and the mixed solution is sprayed to the upper rubber roller and the lower rubber roller through the roller nozzle respectively, and the amount of glue sprayed is 25g / s; the rubber rol...

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Abstract

The invention provides a polyurethane three-dimensional reinforced GMT (glass fiber mat reinforced thermoplastics) composite board and a preparation method thereof. The GMT composite board comprises PU foam liquid and a GMT mat serving as a substrate; the GMT mat serving as the substrate is mainly prepared from one or more of polypropylene fibers, glass fibers and polyester fibers; the PU foam liquid comprises one or slow resilience foam liquid, high resilience foam liquid, semi-rigid foam liquid and rigid foam liquid, and materials A and B are mixed in a mixing cavity and conveyed to an upperrubber roller and a lower rubber roller respectively. The GMT mat passes between the upper rubber roller and the lower rubber roller and is subjected to rolling through a rubber roller machine, thenfoaming and compositing are carried out in a high-pressure combination machine, and cutting is performed finally to obtain the polyurethane three-dimensional reinforced GMT composite board.

Description

technical field [0001] The invention mainly relates to the field of fiber-reinforced thermoplastic resin composite materials, in particular to a polyurethane three-dimensionally reinforced GMT composite board and a preparation method thereof. Background technique [0002] In recent years, people's living standards have been greatly improved, especially in the automotive industry, which requires more health (VOC performance), energy saving (light weight), comfort (NVH performance), safety (high strength) and interior and exterior materials. GMT (Glass fiberMat reinforced Thermoplastics) is a lightweight glass fiber mat reinforced thermoplastic composite sheet. Because of its advantages in strength, specific modulus, and cost, it is widely used in various automotive interior and exterior trims, such as coat racks, spare tire covers, and luggage. Box side panels, ceilings, etc. are the products that the amount of materials used for interior and exterior decoration of automobile...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/18B32B27/32B32B27/40B29C43/24B29C69/00B60R13/02
Inventor 黄培林马国维何斐鲁陈荣枝祝超刘志阳曹安东楼娣
Owner 浙江华江科技股份有限公司
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