Fireproof Member With Additive-Resistant Adhesive Layer

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Solution Overview

Problem

Fire-resistant members with adhesive layers face challenges in maintaining fire resistance and adhesion due to migration of liquid additives from the fire-resistant layer into the adhesive layer, which affects shape retention and adhesion properties.

Innovation Solution

Incorporating a liquid additive-resistant adhesive layer or an underlying layer between the fire-resistant layer and the adhesive layer, utilizing thermoplastic resins, thermoplastic elastomers, and rubbers, along with thermally expandable graphite and inorganic fillers, to prevent additive migration and enhance adhesion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the amount of flame-resistant filler is increased to enhance fire resistance, then fire resistance is improved, but the viscosity of the composition increases making it difficult to form into a film shape

Engineering Contradiction:

Improvefire resistanceVSAvoidmolding processability

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent changes the physical state of the plasticizer from solid to liquid form, which significantly reduces the viscosity of the composition and improves molding processability while maintaining fire resistance properties

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite material system combining vinyl chloride resin with thermally expandable graphite and liquid plasticizer, where the liquid plasticizer acts as a processing aid that enables film formation at lower temperatures, preventing premature expansion of the graphite filler

Inventive Principle:

Principle #40Composite materials

2Ease of manufacture

If a liquid additive such as plasticizer is added to improve molding processability, then molding processability is improved, but the liquid additive migrates into the adhesive layer reducing shape retention and adhesion

Engineering Contradiction:

Improvemolding processabilityVSAvoidshape retention and adhesion

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent introduces a barrier layer as an intermediary between the fire-resistant layer containing liquid plasticizer and the adhesive layer. This barrier layer prevents migration of the liquid plasticizer into the adhesive, maintaining both shape retention and adhesion properties

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The barrier layer is implemented as a thin film structure that selectively prevents migration of liquid additives while allowing the fire-resistant member to maintain its flexibility and adhesion capabilities

Inventive Principle:

Principle #30Flexible shells and thin films

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

This configuration effectively maintains fire resistance and adhesion while ensuring shape retention, even after exposure to high temperatures, by preventing liquid additive migration and improving the mechanical properties of the fire-resistant member.

Implementation Method 1

thermally expandable graphite

Methodology Applied

Scientific EffectThermal expansion: Thermal Expansion

Data Source

PatentEP3342947B1Adhesive layer-provided fireproof member

Publication Date: 2020.07.08 SEKISUI CHEMICAL CO LTD

Figure 1~2

AI summary

An adhesive layer-equipped fire-resistant member 1 comprises a fire-resistant layer 2 containing a liquid additive and one or more components selected from the group consisting of thermoplastic resins, thermoplastic elastomers, and rubbers, and a liquid additive-resistant adhesive layer 3 disposed on one side of the fire-resistant layer 2.