Fiber Reinforced Profiled Object Flame Retardancy
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Solution Overview
Problem
Existing elongate profiled objects, such as scaffolding planks, often lack sufficient flame retardancy, which is crucial in certain applications, despite having desirable mechanical properties.
Innovation Solution
A fiber-reinforced elongate profiled object with a reinforcement layer comprising a tape or laminate of tapes made from a fiber-reinforced thermoplastic composition with a thickness of at least 0.6 mm, incorporating a flame retardant, applied to a thermoplastic peripheral wall, enhancing the object's flame retardancy to achieve Class C or D ratings according to EN13823:2014.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a reinforcement layer is added to improve mechanical properties, then strength and stiffness are improved, but flame retardancy is insufficient
Solution Approach 1:
The patent applies composite materials by combining a thermoplastic matrix with flame-retardant additives and reinforcing fibers (such as glass fibers) within the reinforcement layer. This creates a multi-phase composite structure where the thermoplastic provides structural integrity, the flame-retardant additives provide fire resistance, and the fibers enhance mechanical strength and stiffness, thereby simultaneously addressing both mechanical performance and flame safety requirements.
Solution Approach 2:
The patent utilizes parameter changes by modifying the chemical composition of the reinforcement layer through the incorporation of flame-retardant additives. By changing the chemical parameters (adding phosphorus-based, nitrogen-based, or metal hydroxide flame retardants) and physical parameters (optimizing additive concentration and distribution) of the reinforcement layer, the material achieves both enhanced mechanical properties and improved flame retardancy ratings.
2Object-affected harmful factors
If flame retardant additives are incorporated to improve flame retardancy, then fire resistance is improved, but mechanical properties may deteriorate
Solution Approach 1:
The patent employs composite materials to counteract the potential mechanical degradation caused by flame-retardant additives. By integrating reinforcing fibers (such as glass fibers) into the thermoplastic matrix containing flame retardants, the composite structure compensates for any strength loss and actually enhances overall mechanical performance while maintaining fire resistance.
Solution Approach 2:
The patent applies local quality by concentrating flame-retardant additives specifically within the reinforcement layer rather than throughout the entire plank structure. This localized approach ensures that flame retardancy is enhanced where structurally critical (in the reinforcement layer) while minimizing the impact on overall mechanical properties of the plank.
Data Source
AI summary
The invention relates to an elongate profiled object having a cross section, the object comprising a peripheral wall, forming a hollow profile extending in a longitudinal direction, wherein at least part of the peripheral wall is provided with a reinforcement layer extending in at least the longitudinal direction of the elongate profiled object,wherein the reinforcement layer comprises a tape or a laminate of tapes,wherein the reinforcement layer has a thickness of at least 0.6 mm and the tape is made of a first thermoplastic composition, which is a fiber reinforced thermoplastic composition comprising a flame retardant,wherein the elongate profiled object is made of a second thermoplastic composition.