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Preparation method of polyurethane elastomer veneer

A polyurethane elastomer and polyurethane technology, applied in chemical instruments and methods, laminated, layered products, etc., can solve the problems of flammability, shock absorption and compression resistance ratio, and large foam cells, etc., to achieve increased Effects of light-shielding and airtightness, shock absorption, excellent compression resistance and cushioning shock-absorbing properties

Inactive Publication Date: 2011-01-19
罗清林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polyurethane elastomer sheet is a microporous polyurethane foam material specially designed for high-end sealing applications. It is widely used in mobile phones, computers, digital cameras, handheld computers, navigators and other products. Similar products on the existing market are made of PE or EVA As materials, (commonly known as PE foam or EVA foam), their disadvantages are poor shock absorption and compression resistance, flammability, and large foam cells

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A preparation method of a polyurethane elastomer sheet of the present invention comprises the following steps: taking 100 parts (mass fraction) of polyether polyol and 15 parts (mass fraction) of modified MDI; In the different raw material barrels in the foaming machine, the temperature of the raw material barrels is controlled at 23°C, and the polyurethane foaming machine is started to fully stir and mix;

[0016] Take the corona-treated PET film, and evenly coat the above-mentioned mixed solution on the corona-treated PET film. The mixture is formed into flakes so that the thickness of the flakes is 0.1 mm;

[0017] Put the above semi-finished product into the ultraviolet curing machine, use ultraviolet light to cure for 5 seconds, and take it out.

Embodiment 2

[0019] A preparation method of a polyurethane elastomer sheet of the present invention comprises the steps of: taking 100 parts (mass fraction) of polyether polyol and 20 parts (mass fraction) of modified MDI; In the different raw material barrels in the foaming machine, the temperature of the raw material barrels is controlled at 24°C, and the polyurethane foaming machine is started to fully stir and mix;

[0020] Take the corona-treated PET film, and evenly coat the above-mentioned mixed solution on the corona-treated PET film. The mixture is formed into flakes so that the thickness of the flakes is 0.2mm;

[0021] Put the above semi-finished product into the ultraviolet curing machine, use ultraviolet light to cure for 6 seconds, and take it out.

Embodiment 3

[0023] A preparation method of a polyurethane elastomer sheet of the present invention comprises the following steps: taking 100 parts (mass fraction) of polyether polyol and 30 parts (mass fraction) of modified MDI; In the different raw material barrels in the foaming machine, the temperature of the raw material barrels is controlled at 25°C, and the polyurethane foaming machine is started to fully stir and mix;

[0024] Take the corona-treated PET film, and evenly coat the above-mentioned mixed solution on the corona-treated PET film. The mixture is formed into flakes so that the thickness of the flakes is 0.3 mm;

[0025] Put the above semi-finished product into the ultraviolet curing machine, use ultraviolet light to cure for 5 seconds, and take it out.

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PUM

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Abstract

The invention relates to a preparation method of a polyurethane elastomer veneer, comprising the following steps: step 1) taking 100 parts of polyether glycol and 15-30 parts of modified MDI according to mass fraction; step 2) respectively placing the two raw materials in step 1 into different raw material barrels in a polyurethane foaming machine, and starting the polyurethane foaming machine to fully stir and blend the two raw materials; step 3) taking a PET film which is subject to the corona disposal, evenly spreading the stirred mixed liquor in step 2 on the PET film subject to the corona disposal, and then rolling the PET film by a rolling shaft to cause the mixture covered on the PET film to form a veneer with the thickness of 0.1-5mm; and step 4) delivering the semi-finished product in the step 3 to an ultraviolet curing machine to cure the semi-finished product by UV and finally taking out the finished product. In the invention, the polyether glycol, the modified MDI and the PET are integrated into a whole and the polyurethane elastomer veneer has the effects of sound insulation, watertightness, dust prevention and the like in addition to the properties of excellent compression resistance and shock absorption.

Description

technical field [0001] The invention relates to the field of molding or connection of plastics, in particular to a preparation method of a polyurethane elastomer sheet. Background technique [0002] Polyurethane elastomer sheet is a microporous polyurethane foam material specially designed for high-end sealing applications. It is widely used in mobile phones, computers, digital cameras, handheld computers, navigators and other products. Similar products on the existing market are made of PE or EVA As materials, (commonly known as PE foam or EVA foam), their disadvantages are poor shock absorption and compression resistance ratio, flammability, and large foam cells. Contents of the invention [0003] In order to solve the above problems, the present invention provides a method for preparing a polyurethane elastomer sheet that can effectively cushion and absorb shocks, absorb shocks, and increase light-shielding and airtightness. [0004] A kind of preparation method of pol...

Claims

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Application Information

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IPC IPC(8): B32B37/15B32B38/18B32B27/08B32B27/28B32B27/36C08G18/48C08J9/00C08J3/28C08G101/00
Inventor 罗清林
Owner 罗清林
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