Gypsum Panel Termite Protection via Core Concentration Gradient

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Solution Overview

Problem

Conventional gypsum panels require high termiticide content for effective anti-termite protection, leading to increased costs and potential deformation during the drying process, with termiticide distribution being uneven and insufficient when applied only to the surface, especially after cutting.

Innovation Solution

A gypsum panel design with a gypsum core having three regions of equal thickness, where the termiticide is distributed across the first and second end regions with a lower concentration in the center region, ensuring comprehensive anti-termite protection while minimizing termiticide usage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the solution containing the termiticide is applied in large amounts to the surface of the gypsum panel, then the anti-termite effect is sufficient, but the working burden on the worker increases

Engineering Contradiction:

Improveanti-termite effectVSAvoidworking burden

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The termiticide is incorporated into the gypsum core during the manufacturing process before the panel is put into service. This preliminary action ensures that the termiticide is already distributed throughout the material, eliminating the need for subsequent application work and ensuring consistent protection without requiring manual labor for surface treatment.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The manufacturing process of the gypsum panel is merged with the impregnation process. The termiticide solution is applied to the gypsum core during manufacturing, combining two operations (panel production and termiticide treatment) into one, thereby reducing the working burden while maintaining sufficient anti-termite protection.

Inventive Principle:

Principle #5Merging (Combining)

2Ease of operation

If the solution containing the termiticide is applied in small amounts, then the working burden is reduced, but it becomes difficult to uniformly apply the solution, resulting in an insufficient effect

Engineering Contradiction:

Improveworking burdenVSAvoidanti-termite effect

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

Inventive Principle:

Principle #10Preliminary action

3Reliability

If the solution containing the termiticide is applied to the surface and dried, then the anti-termite effect is achieved, but deformation such as warpage may be caused

Engineering Contradiction:

Improveanti-termite effectVSAvoiddeformation

Core Design Contradiction:

ReliabilityVSShape

Solution Approach 1:

The drying step that causes deformation is extracted and eliminated from the process. Instead of applying a solution that requires subsequent drying, the termiticide is incorporated into the gypsum core during manufacturing when the material is still in its formable state, avoiding the harmful drying phase entirely while maintaining the anti-termite effect.

Inventive Principle:

Principle #2Taking out (Extraction)

4Reliability

If the solution containing the termiticide is applied to the surface, then the surface is protected, but when the panel is cut, the cut sections lack termiticide protection

Engineering Contradiction:

Improvesurface protectionVSAvoidprotection after cutting

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentEP3392223B1Gypsum board

Publication Date: 2021.09.08 YOSHINO GYPSUM CO LTD

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AI summary

A gypsum panel includes a gypsum core containing a termite repellent with poor water solubility, wherein the gypsum core has a first end region, a center region, and a second end region having an equal thickness and extending along a thickness direction from one surface side to another surface side, the termite repellent is contained in each of the first end region, the center region, and the second end region, and a content of the termite repellent in the center region is lower than a content of the termite repellent in the first end region and in the second end region.