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Polyurethane foam laminate, manufacturing method thereof, and gasket

A technology of polyurethane foam and manufacturing method, which is applied in the field of polyurethane foam layer, can solve problems such as reduced flame retardancy, sealing problems, and enlarged contact area, and achieves excellent flame retardancy, excellent adhesion, and small compression residual deformation Effect

Active Publication Date: 2014-10-01
INOAC CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this patent document 1, it is described that when the density of the foam part is low, the contact area with the air becomes large and the flame retardancy decreases.
In addition, it is described that in this flame-retardant sealing material, when the compounding amount of the metal hydroxide exceeds 50 parts by weight, the foam part becomes hardened or brittle, and sealing performance becomes a problem.

Method used

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  • Polyurethane foam laminate, manufacturing method thereof, and gasket
  • Polyurethane foam laminate, manufacturing method thereof, and gasket
  • Polyurethane foam laminate, manufacturing method thereof, and gasket

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4 and 6～15

[0141] Examples 1-4 and 6-15, and Comparative Examples 1-7

[0142] 100 parts of polyether polyol (polyether polyol A and B are used in a mass ratio of 90 / 10), 0.1 part of catalyst, 5 parts of foam stabilizer, and metal hydroxides in the compounding amounts listed in Tables 1 to 4 Mix and stir the material powder and phosphorus flame retardant to prepare the first mixture.

[0143] Then, put the first mixture and the polyisocyanate whose isocyanate index reaches 0.9-1.1 into the chamber of the Oaks mixer. Then, an amount of nitrogen gas in an amount to achieve a predetermined volume ratio described in Tables 1 to 4 was simultaneously injected so that the target density of the foam layer described in Tables 1 to 4 was achieved.

[0144] Secondly, the above-mentioned ingredients are stirred and mixed indoors to prepare a foamed gas-liquid mixture. And this gas-liquid mixture is supplied on the resin film conveyed at a speed of 5 m / min, and on the surface of the cast gas-liquid...

Embodiment 5

[0147] A polyurethane foam laminate was obtained in the same manner as above except that only 100 parts of polyether polyol A was used as the polyether polyol (Table 1).

[0148] Cut test pieces from the polyurethane foam laminate produced above, measure the density of the foam layer, the average pore diameter, the load at 40% compression, and the compression residual deformation, and evaluate the appearance of the foam layer, whether there is bleeding, whether there is a scratch, and flame retardant. The results are shown in Tables 1 to 4.

[0149] (1) The density of the foam layer

[0150] A square shape (50 mm×50 mm) was cut out from the obtained polyurethane foam laminate to prepare a test piece, and the vertical and horizontal dimensions of the test piece were accurately measured with a caliper. Then, the thickness of the resin film was subtracted from the thickness of the laminate shown in each table to obtain the thickness of the foam layer. Then, the volume of the f...

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Abstract

PURPOSE: A polyurethane foam laminate, and a manufacturing method and a gasket thereof are provided to prevent flame retardants from being bled out and damaged. CONSTITUTION: A polyurethane foam laminate mixes form materials including polyisocyanate, polyol, and flame retardants with air, generates an air mixture(21a), and supplies the air mixture on a resin film(22a), and heats the air mixture to obtain a resin film layer. The polyurethane foam laminate includes a form layer made of polyurethane foams.

Description

technical field [0001] The present invention relates to a polyurethane foam laminate, a method for producing the same, and a gasket. More specifically, the present invention relates to a polyurethane foam layer that contains a specific flame retardant, does not bleed out the flame retardant, is soft and hard to scratch, and has excellent appearance; and a polyurethane foam layer that is excellent in flame retardancy of a resin film layer. A pressed body, a method for producing the same, and a gasket having excellent flame retardancy and sealing properties using the polyurethane foam laminate. Background technique [0002] Originally, in electronic devices such as portable communication devices such as mobile phones, digital cameras, car navigation systems, and portable audio devices, gaskets are placed on the peripheral parts of the case to prevent moisture and dust from entering the interior. The gasket, especially when installed on electronic instruments and precision ins...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B5/18B32B27/18B32B27/40C08L75/04C08K3/22C08J9/30
CPCB32B5/18B32B27/065B32B2266/0278B32B2307/3065B32B2581/00
Inventor 小柳津诚司
Owner INOAC CORP
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