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A long glass fiber reinforced lightweight thermoplastic composite material for preparing a full-length underbody protection plate of a passenger car and a preparation method thereof

A bottom guard, thermoplastic technology, applied in the field of composite materials for automotive exterior parts, can solve the problems of long fiber wear and tear, reduce the ratio of vertical and horizontal strength, excellent formability, improve breaking strength and elongation at break Effect

Active Publication Date: 2017-10-13
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

[0007] The technical problem to be solved in the present invention is to disclose a long-fiber reinforced lightweight thermoplastic composite sheet for preparing a full-length passenger car underbody protection plate and its preparation method, which solves the problem of multi-layer underbody protection in multi-layer joints. Abrasion and breakage of long fibers during consolidation process

Method used

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  • A long glass fiber reinforced lightweight thermoplastic composite material for preparing a full-length underbody protection plate of a passenger car and a preparation method thereof
  • A long glass fiber reinforced lightweight thermoplastic composite material for preparing a full-length underbody protection plate of a passenger car and a preparation method thereof
  • A long glass fiber reinforced lightweight thermoplastic composite material for preparing a full-length underbody protection plate of a passenger car and a preparation method thereof

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Embodiment 1

[0034] figure 1 It is a schematic structural view of the long-fiber reinforced lightweight thermoplastic composite sheet used to prepare the full-length underbody protection plate of a passenger car according to the present invention. From bottom to top, it is an anti-seepage and scratch-resistant layer 1, a toughened impact-resistant layer 2, and a rigid skeleton Layer 3, sound-absorbing and noise-reducing layer 4 and hydrophobic and oil-repellent layer 5, wherein the toughened and impact-resistant layer 2 and the sound-absorbing and noise-reducing layer 4 use thermoplastic polypropylene fiber (fiber length 60mm / denier 7D) as the bonding matrix, polyester fiber ( Fiber length 60mm / fineness 1.5D / cross-section shape) is a composite fiber mat made by uniformly mixing reinforcing materials in a ratio of 35:65, and the surface density is 300g / m 2 The rigid skeleton layer 3 is based on thermoplastic polypropylene fiber (fiber length 100mm / denier 9D) as a bonding matrix, and glass f...

Embodiment 2

[0045] A long-fiber-reinforced lightweight thermoplastic composite sheet used to prepare a full-length underbody guard for a passenger car consists of an anti-seepage and scratch-resistant layer 1, a toughened impact-resistant layer 2, a rigid skeleton layer 3, and a sound-absorbing and reducing layer from bottom to top. The noise layer 4 and the hydrophobic and oil-repellent layer 5, wherein the toughened and impact-resistant layer 2 and the sound-absorbing and noise-reducing layer 4 use thermoplastic polypropylene fibers (fiber length 60mm / denier 7D) as bonding matrix, and glass fibers (fiber length 100mm / diameter 30μm) is a composite fiber mat prepared by uniformly mixing reinforcing materials in a ratio of 60:40, 70:30 or 80:20, and the surface density is 300g / m2 ; Rigid skeleton layer 3 is made of thermoplastic polypropylene fiber (fiber length 100mm / denier 9D) as a bonding matrix, glass fiber (fiber length 150mm / diameter 50μm) as a reinforcing material uniformly mixed in a...

Embodiment 3

[0055] A long-fiber-reinforced lightweight thermoplastic composite sheet used to prepare a full-length underbody guard for a passenger car consists of an anti-seepage and scratch-resistant layer 1, a toughened impact-resistant layer 2, a rigid skeleton layer 3, and a sound-absorbing and reducing layer from bottom to top. The noise layer 4 and the hydrophobic and oil-repellent layer 5, wherein the toughened and impact-resistant layer 2 and the sound-absorbing and noise-reducing layer 4 use thermoplastic polypropylene fibers (fiber length 60mm / denier 7D) as bonding matrix, polyester fibers (fiber length 60mm / denier 7D) 1.5D / cross-sectional shape is triangular) is a composite fiber mat made by uniformly mixing reinforcing materials in a ratio of 35:65, and the surface density is 300g / m 2 ; Rigid skeleton layer 3 is made of thermoplastic polypropylene fiber (fiber length 100mm / denier 9D) as a bonding matrix, glass fiber (fiber length 100mm / diameter 50 μm) as a reinforcing material ...

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Abstract

The invention discloses a long glass fiber reinforced lightweight thermoplastic composite plate material for making passenger car full-length underbodies, and a preparation method thereof. The composite plate material sequentially comprise a seepage and scratch resisting layer, a toughening and shock resisting layer, a rigid skeleton layer, a sound absorption and noise reduction layer and a hydrophobic and oleophobic layer from bottom to top. The preparation method comprises the following steps: mixing fibers and reinforcement fibers required by the toughening and shock resisting layer and the sound absorption and noise reduction layer in proportion, sequentially stacking the toughening and shock resisting layer, the rigid skeleton layer, the sound absorption and noise reduction layer and the hydrophobic and oleophobic layer in the preparation process of a rigid skeleton layer composite felt, carrying out a heating pre-compressing technology on the obtained continuous composite plate material, and covering the obtained composite plate material with the seepage and scratch resisting layer to form an underbody blank. External functional layers required by the plate material are consolidated through acupuncture in the preparation process of the core layer rigid skeleton layer to form the composite fiber felt, so damages induced by multiple acupunctures of rigid skeleton layer fibers are avoided, and the stress transfer continuity of resin in the material is improved.

Description

technical field [0001] The invention belongs to the technical field of composite materials for automotive exterior parts, and in particular relates to a long glass fiber reinforced lightweight thermoplastic composite plate used for preparing a full-length underbody guard plate of a passenger car and a preparation method thereof. Background technique [0002] The underbody guard of passenger cars is a protective device attached under the car body according to each vehicle model. Its functions are: (1) to prevent foreign objects such as water or sediment from splashing into the engine compartment during driving, Keep the engine compartment clean; (2) Prevent rainwater, ice and snow from corroding the chassis system; (3) Resist the scratching of the chassis system by the abnormal raised ground during driving, and the hard gravel caused by the wheel rolling (4) Reduce the resistance of the air flow entering the bottom of the car, reduce the lift force caused by turbulence, and i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/12B32B27/02B32B17/02B32B17/06
CPCB32B17/064B32B27/12B32B2250/05B32B2307/102B32B2307/50B32B2307/558B32B2307/73B32B2307/752B32B2605/08
Inventor 方晶丁文鹏陈佳杨傅华康周立马国维
Owner 浙江华江科技股份有限公司
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