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Polyurethane laminated moulding product and preparation method thereof

A polyurethane layer, polyurethane resin technology, applied in the direction of layered products, metal layered products, chemical instruments and methods, etc., can solve problems such as increased cost, production suspension, poor demoulding effect, etc.

Active Publication Date: 2017-12-26
COVESTRO DEUTSCHLAND AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And because the demoulding effect is not good, the product is easy to stick to the mold, so the surface of the mold should be cleaned every few hours
These operations will suspend normal production, reduce production efficiency and increase costs

Method used

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  • Polyurethane laminated moulding product and preparation method thereof
  • Polyurethane laminated moulding product and preparation method thereof

Examples

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preparation example Construction

[0061] II. Process for the preparation of polyurethane laminate molding compositions

[0062] The present invention also provides a kind of preparation method of polyurethane lamination molding composition on the other hand, described preparation method comprises steps:

[0063] i) providing a part to be laminated, said part to be laminated comprising a core layer and one or more layers of reinforcing fiber mat or reinforcing fiber fabric disposed on at least one side of said core layer;

[0064] ii) applying the above polyurethane resin composition on the reinforcing fiber mat or reinforcing fiber fabric layer;

[0065] iii) placing the part obtained in step ii) in a mold, laminating the part to obtain a three-dimensional shape, and curing the polyurethane resin composition; and

[0066] iv) demoulding to obtain said polyurethane laminate molding,

[0067] The method provided by the invention can reduce the frequency of use of the external release agent, improve productio...

Embodiment 1-3

[0081] Mix the components in each example in Table 1 except isocyanate, mix with isocyanate through a high-pressure spraying system and spray on the "interlayer semi-finished product". The so-called interlayer semi-finished product is a honeycomb cardboard covered with glass fiber felt on both sides. The weight of glass fiber mat used is 250g / m 2 , the spraying amount of the polyurethane resin composition is 250g / m 2 . After spraying, the mechanical arm sends the sprayed object to the press, and solidifies it at a mold temperature of 120°C. The number of self-releases is tested on a mold coated with the same external release dose. Polyurethane laminated molded articles were obtained, and the demoulding time was 90 seconds in each case.

[0082] In order to accurately measure the demoulding effect, the same amount of external mold release agent is sprayed on the mold each time, and a puller is used for demoulding when demoulding. If the pulling force displayed on the puller ...

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Abstract

The invention relates to a polyurethane laminated moulding product, the polyurethane laminated moulding product comprises a core layer and an enhanced fibrous layer arranged on at least one side of the core layer, By applying a polyurethane resin composition on one layer or multilayer enhanced fibrofelts or enhanced fabrics, and the polyurethane resin is solidified, and the enhanced fibrous layer is formed. The polyurethane laminated moulding product has good mold release property and productivity.

Description

technical field [0001] The present invention relates to a polyurethane laminated molded product comprising a core layer and a reinforcing fiber layer provided on at least one side of the core layer, and the reinforcing fiber layer is applied by applying a polyurethane resin composition It is formed after curing the polyurethane resin on one or more layers of reinforced fiber felt or reinforced fiber fabric. Another aspect of the present application relates to a method for preparing said polyurethane laminate molded article. Background technique [0002] Polyurethane laminated molded products are well known to those skilled in the art. It is provided with reinforced fiber felt or reinforced fiber fabric on one or both sides of the core layer (such as paper honeycomb, aluminum honeycomb, foam core, etc.), and polyurethane The reaction mixture is applied to the reinforcing fiber mat or the reinforcing fiber fabric, and then the part covered with the polyurethane reaction mixtu...

Claims

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Application Information

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IPC IPC(8): B32B27/12B32B27/40C08G18/67C08G18/66C08G18/48C08G18/32
CPCB32B27/12B32B27/40C08G18/4804C08G18/6677C08G18/6685C08G18/6696B32B5/022B32B5/024B32B5/18B32B5/24B32B5/245B32B15/14B32B29/02B32B29/08B32B3/12C08G18/7664C08G18/092C08G18/225C08G18/3206C08G18/324C08G18/36B32B2250/02B32B2250/03B32B2250/40B32B2260/021B32B2260/023B32B2260/046B32B2262/0269B32B2262/101B32B2262/106B32B2266/0278B32B2605/00C08G2101/00B32B2262/06B32B2262/14B32B2605/08B32B2605/003C08G2115/02C08G2110/0083B29C43/206B29K2075/00B29K2105/0014B29K2709/08B32B2255/02B32B2255/26
Inventor 朱宏李军
Owner COVESTRO DEUTSCHLAND AG
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