Glueline Biocide Particles for Glued-Wood Retention
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Solution Overview
Problem
Existing biocide formulations in glued-wood products suffer from significant degradation, inactivation, and sequestration during hot pressing and block stacking, leading to reduced and uneven biocide retentions, necessitating higher doses to meet minimum retention requirements.
Innovation Solution
The use of biocide particles with a volume mean diameter D [4,3] of at least 20 μm, applied in glueline treatment, enhances biocide retention in glued-wood products, particularly after hot pressing and block stacking, by formulating the biocide as particles with specific size and concentration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If biocide is applied in conventional formulations during glueline treatment, then biocide distribution in the glueline is achieved, but significant degradation and inactivation occurs during hot pressing and block stacking leading to reduced retention
Solution Approach 1:
The patent changes the physical state parameter of the biocide from dissolved/conventional formulation to large particles (D[4,3] ≥ 20 μm). This parameter change makes the biocide resistant to degradation and inactivation during hot pressing and block stacking, thereby improving reliability while maintaining stability.
2Reliability
If higher doses of biocide are applied to compensate for degradation, then minimum retention requirements are met, but application cost and potential environmental burden increase
Solution Approach 1:
By changing the particle size parameter to D[4,3] ≥ 20 μm, the biocide becomes resistant to degradation during processing. This allows achieving the same retention with lower application doses, thereby reducing quantity of substance while maintaining reliability.
3Reliability
If conventional biocide formulations are used, then initial biocide distribution is achieved, but uneven retention occurs after hot pressing and block stacking
Solution Approach 1:
The patent applies parameter change by using large particles (D[4,3] ≥ 20 μm) that do not degrade or redistribute during hot pressing and block stacking. This maintains uniform retention throughout the product, improving both reliability and stability of composition.
4Reliability
If biocide is applied as large particles (D[4,3] ≥ 20 μm), then biocide retention and stability are improved, but formulation and application complexity may increase
Solution Approach 1:
The patent simplifies the formulation by using large particles (D[4,3] ≥ 20 μm) that do not require complex stabilizers or protective formulations. The simplicity of using coarse particles actually reduces formulation complexity while improving reliability.
Data Source
AI summary
The present invention relates to a composition for increasing the retention of a biocide in a glueline-treated glued-wood product, a method for increasing the retention of a biocide in a glueline-treated glued-wood product, a glueline-treated glued-wood product, a glue for producing a glueline-treated glued-wood product, and the use of a composition for increasing the retention of a biocide in a glued-wood product.