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Method for producing polyurethane plate for automobile ceiling

A technology of automobile roof and production method, which is applied in the field of composite material processing, can solve the problems of increasing labor intensity of workers, complicated production process, etc., and achieve the effect of simplifying production process and reducing production energy consumption

Inactive Publication Date: 2010-01-20
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

The disadvantage of this method is that the production process is complicated, and the PU board needs to be compounded twice; since PU is a poor conductor of heat, the temperature must be increased to meet the processing requirements, and the two compounding increases the labor intensity of the workers and causes a large energy loss.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The production method of polyurethane sheet material for automobile roof, the steps are as follows:

[0019] 1) Spread 45g / m on the track of the compound machine 2 Spunlaced non-woven fabric, on which the chopped length is 30mm and alkali-free glass fiber 210g / m is successively broadcasted 2 , melt index of 18±2g / 10min, particle size of 80-200 mesh high-density polyethylene powder 90g / m 2 , and then carry out melting and compounding at 170°C and a pressure of 0.1MPa, cooling, and winding to obtain glued glass cloth;

[0020] 2) On the workbench of the composite production line, unwind, stack, and lay the above-mentioned plastic glass cloth, 30g / m2, in sequence from bottom to top 2 Modified polyethylene adhesive film, and then place a 6mm thick polyurethane rigid foam board, and then spread the chopped length of 30mm alkali-free glass fiber 170g / m on the polyurethane rigid foam board 2 , melt index of 18±2g / 10min, particle size of 80-200 mesh high-density polyethylene...

Embodiment 2

[0024] The production method of polyurethane sheet material for automobile roof, the steps are as follows:

[0025] 1) Spread 60g / m on the track of the compound machine 2 Hot-bonded non-woven fabric, on which the chopped length is 20mm medium-alkali glass fiber 160g / m 2 , melt index of 18±2g / 10min, particle size of 80-200 mesh high-density polyethylene powder 90g / m 2 , and then melting and compounding at 180°C under a pressure of 0.1MPa, cooling, and winding to obtain glued glass cloth;

[0026] 2) On the workbench of the composite production line, unwind, stack, and lay the above-mentioned plastic glass cloth, 30g / m2, in sequence from bottom to top 2 Modified polyethylene adhesive film, then place a 7mm thick polyurethane rigid foam board, and then spread chopped medium-alkali glass fibers with a length of 20mm at 150g / m on the polyurethane rigid foam board 2 , The melt index is 18±2g / 10min, the particle size is 80-200 mesh high-density polyethylene powder 160g / m 2 , tile...

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Abstract

The invention discloses a method for producing a polyurethane plate for an automobile ceiling, which comprises the following steps: flatly laying non-woven fabrics on a caterpillar belt of a compound machine; sequentially scattering short-cutting glass fibre and hot-melting adhesive powder on the non-woven fabrics; then melting and compounding at 160-250 DEG C at the pressure of 0.2-1MPa, cooling and rolling to obtain an adhesive glass fabric; sequentially decoiling, stacking and flatly laying the adhesive glass fabric and a bonding film on a working platform of a compound production line from bottom to top and placing a polyurethane rigid foam plate; sequentially scattering short-cutting glass fiber and hot-melting adhesive powder on the polyurethane rigid foam plate; flatly laying the hot-melting adhesive film and heating to 160-250 DEG C by a heating plate of the compound machine; carrying out hot-press compounding at the pressure of 0.2-1MPa and cooling to obtain a polyurethane multilayer composite plate. The invention has simple production process and stable product quality and solves the problem of easy delamination of the polyurethane plate produced by the prior one-step method.

Description

technical field [0001] The invention relates to a production method of a polyurethane sheet for an automobile roof, belonging to the technical field of composite material processing. Background technique [0002] Polyurethane sheets for car roofs are roof interior composite panels used in the automotive industry, and are currently the mainstream products in the domestic car roof market. Traditional automotive interior ceilings, the skeleton materials are mainly cardboard and EPS foam board, the manufacturing process is complicated, and the products produced are easy to deform, which has been gradually replaced by polyurethane multi-layer composite boards. Compared with traditional materials, the roof of polyurethane multi-layer composite board has the characteristics of sound absorption, heat insulation, light weight, easy installation, and no irritating odor. and other fields. [0003] The currently announced production methods for polyurethane sheets mainly include the f...

Claims

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Application Information

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IPC IPC(8): B32B37/24B32B37/06B32B37/10B32B37/12B32B17/04B32B27/14
Inventor 杨春壮周明海顾灯华
Owner 浙江华江科技股份有限公司
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