Resin impregnated substrate, method of mfg. and system therefor

A substrate, resin material technology, applied in the direction of polymer impregnation, transportation and packaging, other household appliances, etc., can solve the problems of high texture, roughness, and unsightly appearance

Inactive Publication Date: 2004-07-21
HOUSTON ADVANCED RESEARCH CENTER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Attempts to remove high-gloss, rough, pitted and damaged surface films from polyisocyanate-impregnated substrates have been unsuccessful as these efforts have produced rough, matte, highly textured surfaces that are overall unattractive
Additionally, if the substrate is molded or designed into a three-dimensional pattern prior to impregnation as door skins are molded, the three-dimensional design or pattern on the cured impregnated substrate will be destroyed if the oven-cured surface film is removed

Method used

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  • Resin impregnated substrate, method of mfg. and system therefor
  • Resin impregnated substrate, method of mfg. and system therefor
  • Resin impregnated substrate, method of mfg. and system therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0054] The performance of six different PMDI styles was compared by treating door skins and door rails / sides with PMDI. These PMDI-style trademarks are as follows: 1) Lupranate M20S (BASF); 2) Elastocast 7034U (BASF); 3) WUC 3092 T (BASF); 4) Desmodur VKS-18 (Bayer); 5) E-743 (Bayer); 6) X0672 (Bayer).

[0055] Each formula is a mixture of 33-49% methylene diphenyl-4,4'-diisocyanate, 3 (25°C), density 9.0-10.3lbs / gal, viscosity 200-3300 centipoise (25°C), NCO content 23-31.5wt%, functionality 2.7.

[0056] Treat the door skin and door rail / edge material as follows.

[0057] The door rail / jar material is 1" thick, 44 lb MDF from Temple. Test samples designated "B" were cut into pieces 6 inches long by 1 1 / 2 inches wide. A test sample designated "A" was shaped to fit a metal door and then cut into 6-inch lengths. The cross-section of Sample "A" was 7 / 8 inches by 1 5 / 8 inches. Drill a 0.120" diameter pilot hole through each piece of door rail / sill material. It is not possib...

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PUM

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Abstract

The disclosed invention relates to polyisocyanate-impregnated lignocellulosic substrates having improved strength, water resistance and appearance, and also to methods and systems for producing such substrates. The polyisocyanate-impregnated lignocellulosic substrate are produced by impregnating a lignocellulosic substrate with an isocyanate resin, followed by polymerization of the isocyanate resin by applying a heated liquid to the impregnated substrate.

Description

technical field [0001] The present invention relates to polyisocyanate impregnated lignocellulosic substrates and methods and systems for their production. More specifically, the present invention is a method of impregnating neutralized high-density fiberboard with isocyanate resin and then polymerizing the resin by applying heat and / or a liquid catalyst, whereby the polymerized board is moisture-resistant and resistant to bacteria and moths. Such polymeric panels can be used for doors, door components, and the like. Background of the invention [0002] Hollow core doors are mainly for internal use. Hollow core doors may be planar doors, ie, flat or slab with or without molded surfaces on the two main surfaces. Skins for flush doors are less expensive, however, they sometimes do not provide the aesthetic features and physical properties desired by users. Hollow core doors produced from MHDF skins are generally not suitable for external use due to problems with water absor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N3/04B27K3/15B27N3/06B27N3/12B27N7/00
CPCB27N7/00Y10T428/31591Y10T428/31551Y10T428/662Y10T428/31993Y10T428/31989B27K3/15
Inventor J·科尔文C·比尼亚尔P·E·蒂索L·R·克罗
Owner HOUSTON ADVANCED RESEARCH CENTER
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