Melamine-Formaldehyde Foam Microsphere Embedding
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Solution Overview
Problem
Melamine-formaldehyde foams with microspheres face challenges in retaining good mechanical properties at high loadings and achieving effective fixation of microspheres within the foam structure, often requiring additional production steps and processes.
Innovation Solution
A melamine-formaldehyde foam with microspheres having a core comprising active substances like foam glass, sodium sulfate, and a shell of melamine-formaldehyde resin, where the microspheres are preferentially embedded in the open-cell pores during foam production, avoiding incorporation into struts or nodes, thus maintaining mechanical properties and simplifying the production process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If high loadings of microspheres are incorporated into the foam structure, then thermal and acoustical insulation properties are improved, but mechanical properties deteriorate
Solution Approach 1:
The patent applies local quality by specifying that microspheres should be preferentially embedded in the open-cell pores of the foam structure rather than being uniformly distributed or incorporated into struts and nodes. This localized placement in pore spaces allows high microsphere content (improving insulation) while avoiding concentration in load-bearing regions (preserving mechanical strength).
Solution Approach 2:
The invention utilizes the porous open-cell structure of the foam as the designated location for microsphere incorporation. By embedding microspheres within the pore spaces rather than replacing structural components, the patent achieves high loading levels while maintaining the load-bearing integrity of the foam struts and nodes.
2Quantity of substance
If microspheres are incorporated into the foam structure, then insulation properties are improved, but fixation of microspheres becomes difficult
Solution Approach 1:
The patent applies preliminary action by incorporating microspheres into the foam structure during the foam production process itself, rather than attempting to add them afterwards. The microspheres are present in the precondensate mixture before foaming, allowing them to become embedded in the pore structure as the foam expands and sets, eliminating the need for separate fixation steps.
Solution Approach 2:
The invention merges the microsphere incorporation step with the foam production process into a single integrated operation. By combining these two processes, the patent eliminates the need for additional impregnating or fixation steps that would be required if microspheres were added separately, thereby simplifying manufacturing.
3Reliability
If additional process steps are used to incorporate microspheres, then fixation is improved, but production complexity increases
Solution Approach 1:
The patent merges microsphere incorporation with the foam production process into a single integrated operation. The microspheres are included in the precondensate mixture before foaming begins, so they become embedded in the pore structure as the foam expands and sets. This integration eliminates the need for separate impregnating or fixation steps, maintaining reliable fixation while simplifying the overall production process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution ensures good mechanical and acoustic characteristics of the foam even at high microsphere contents, with improved fixation and production efficiency, allowing for effective thermal and acoustical insulation applications.
Implementation Method 1
heating a mixture comprising at least one melamine-formaldehyde precondensate, microspheres comprising the at least one active and/or effective substance and having a shell comprising at least one melamine-formaldehyde resin, and optionally further additives, to obtain a corresponding foam
Data Source
AI summary
The present invention relates to a melamine-formaldehyde foam comprising microspheres having a core comprising at least one active and/or effective substance selected from the group consisting of inorganic compounds, latent heat accumulators, flame retardants, surfactants, detergents, dyes, fragrances, biocidally acting substances, intumescents, hydrophobicizing agents, adhesives, substances influencing haptics or the soil release behavior, formaldehyde scavenger, substances improving indoor air quality, skin care products and formulations, abrasives and mixtures thereof and having a shell comprising at least one melamine-formaldehyde resin, a process for their preparation and to the use thereof.