Automobile interior ceiling with high strength and high sound absorption performance and preparation method thereof

A car roof and polyurethane technology, applied in chemical instruments and methods, vehicle parts, lamination, etc., can solve the problems of high cost, low sound absorption performance and other problems, achieve enhanced absorption, improve air permeability and sound absorption performance, and improve qualified products rate effect

Inactive Publication Date: 2018-04-10
YANTAI ZHENGHAI HIGH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The invention mainly solves the problems of poor low sound-absorbing performance and high cost of existing high-strength and high-sound-absorbing polyurethane car roofs

Method used

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  • Automobile interior ceiling with high strength and high sound absorption performance and preparation method thereof

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Embodiment 1

[0023] Embodiment 1, for better understanding and implementation, the following specific embodiments are given in conjunction with the accompanying drawings to describe the present invention in detail; the given embodiments are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0024] Example 1, see figure 1 , High-strength and high-sound-absorbing polyurethane car roof is prepared by the following process:

[0025] (1) Glue rolling: take the glass fiber mat and roll the glue on the glue rolling machine to make the glue glass layer. The glass fiber felt is a wet felt with a weight of 80g / m 2 ; The temperature of the rubber roller is 40°C, the height of the rubber roller is 1.5mm, and the amount of rubber rolled on each layer of glue glass is: the first layer is 17-23g / m 2 , the second layer 25-30 g / m 2 , the third layer 30-35g / m 2 ;The glue is environment-friendly moisture curing polyurethane glue;

[0026] (2) S...

Embodiment 2

[0032] Embodiment 2, same as embodiment 1, the difference is that the temperature of the rubber roller in the rubber rolling step is 15°C, and the height of the rubber roller is 1mm; the mold temperature in the pressing molding step is 100°C, the molding pressure is 9 MPa, and the molding dwell time 45s; the setting time of the cooling setting step is 30s; the cutting pressure of the robot water jet cutting step is 2500 Pa.

Embodiment 3

[0033] Embodiment 3, same as embodiment 1, the difference is that the temperature of the rubber roller in the rubber rolling step is 45°C, and the height of the rubber roller is 3mm; the mold temperature in the pressing molding step is 140°C, the molding pressure is 8 MPa, and the molding dwell time 30s; the setting time of the cooling setting step is 45s; the cutting pressure of the robot waterjet cutting step is 3500 Pa.

[0034] A high-strength and high-sound-absorbing polyurethane car roof and its preparation method according to the present invention, the plastic glass layer is made of glass fiber felt coated with environmental-friendly moisture-curing polyurethane glue of different grammes, and the density of the first PU layer is greater than that of the second PU layer Density, different densities can absorb noise in different frequency bands, effectively enhancing the sound absorption and noise reduction effect of the ceiling.

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Abstract

The invention discloses an automobile interior ceiling with high strength and high sound absorption performance and a preparation method thereof. The ceiling is characterized in that the ceiling is prepared through mould pressing and compounding of a back-layer non-woven fabric layer (70), a third rubber-glass layer (60), a second PU layer (50), a second rubber-glass layer (40), a first PU layer (30), a first rubber-glass layer (20) and a surface decoration layer (10); the density of the first PU layer is greater than that of the second PU layer. The preparation method comprises the steps thatglass fiber felt is coated with polyurethane rubber to prepare the rubber-glass layers, and the automobile interior ceiling is manufactured through heat molding; the PU layers with different densities can absorb noise in different frequency bands, and the sound absorption and noise reduction functions are enhanced. The ceiling is good in strength and good in sound absorption performance.

Description

Technical field: [0001] The invention relates to the technical field of automobile roofs, in particular to a high-strength, high-sound-absorbing polyurethane automobile roof and a preparation method thereof; it is a high-strength, high-sound-absorbing, glass fiber mat glued instead of traditional PU used for the roof of high-end models. A car roof that is coated with glue and double-layer PU layers are used synchronously. Background technique: [0002] At present, the preparation method of conventional polyurethane automobile roof is PU layer rolling. The open and honeycomb structure inside the PU foam has a good sound absorption effect, but the porous material has poor sound absorption effect on low frequency sound, that is, sound absorption in the low frequency area. The coefficient is small. Among the relevant patents published so far, there are three types of manufacturing processes for high-strength and high-sound-absorbing polyurethane ceilings: [0003] Dry process:...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B17/02B32B17/10B32B17/12B32B17/06B32B27/40B32B37/00B32B37/10B60R13/02
CPCB32B27/40B32B5/26B32B27/12B32B37/0038B32B37/10B32B2255/02B32B2262/101B32B2307/10B32B2307/724B32B2605/08B60R13/0212
Inventor 朱维珍尹立健郭焕祥杜迎梅李海帆
Owner YANTAI ZHENGHAI HIGH TECH
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