Method for producing a covering element made from fibers impregnated with bitumen having improved fire properties, and composition
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Solution Overview
Problem
Existing methods for improving the fire behavior of bitumen-impregnated cellulose fiber roofing elements, such as using dry graphite deposition, are complex and difficult to integrate into existing production lines, leading to uneven spreading and installation challenges.
Innovation Solution
A method involving a liquid composition with a fireproof additive containing graphite and a cooling agent, such as colemanite, is applied to the fiber mat using a roll coating process, which can be easily integrated into existing production equipment, ensuring homogeneous coverage and improved fire resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dry graphite deposition is used to improve fire behavior, then fire resistance is improved, but device complexity and difficulty of integration increase
Solution Approach 1:
The invention changes the physical state of graphite from dry particles to suspended form in a liquid composition. This parameter change allows the graphite to be applied using existing liquid coating equipment rather than requiring complex dry particle deposition systems, thereby reducing device complexity while maintaining fire resistance improvement
Solution Approach 2:
The invention introduces a liquid composition as an intermediary carrier that suspends graphite particles. This liquid medium acts as a mediator between the graphite and the roofing element, enabling easy application through conventional coating equipment and simplifying the overall process while achieving the desired fire protection
2Reliability
If dry graphite spreading is used, then fire behavior is improved, but manufacturing precision and homogeneity decrease
Solution Approach 1:
Changing graphite from dry particles to suspension in liquid composition fundamentally alters the application characteristics. The liquid suspension enables uniform distribution through conventional coating equipment, achieving homogeneous coverage that is difficult to obtain with dry particle methods
Solution Approach 2:
The invention uses liquid hydraulic medium to carry and distribute graphite particles. This hydraulic approach leverages the flow properties of liquids to achieve uniform distribution and homogeneous spreading across the roofing element surface, overcoming the limitations of dry particle methods
3Reliability
If specific dedicated equipment is used for graphite spreading, then fire resistance is achieved, but ease of manufacture and installation decrease
Solution Approach 1:
The invention makes the coating equipment universal by using a liquid composition that can be applied with existing dyeing and coating equipment. This multi-functional approach allows the same equipment to serve both coloring and fire protection functions, eliminating the need for dedicated graphite spreading equipment and simplifying installation
Solution Approach 2:
The invention merges the fire protection function with the existing dyeing/coating process. By incorporating graphite into the liquid composition used for coloring, the patent combines multiple functions into a single operation, thereby simplifying the manufacturing process and improving ease of installation without requiring separate equipment
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 approach simplifies the manufacturing process, provides effective fire protection, and allows for controlled application and better incorporation of graphite into the roofing elements, while also enabling the creation of colored patterns and maintaining the integrity of the fibers.
Implementation Method 1
an additive having fireproof properties and including at least graphite and a cooling agent
Implementation Method 2
a cooling agent, such as colemanite
Data Source
AI summary
A method for producing a covering element made from natural fibres, in particular cellulose, impregnated with bitumen, includes a step of coating at least one of two faces of a fibre mat (4) followed by a step of impregnating with bitumen, the coating being carried out with a liquid composition (5) including at least one resin and/or at least one pigment. The liquid composition is a dye composition including at least one pigment and at least one resin, and the method involves adding an additive to the liquid composition (5), the additive having fireproof properties and including at least graphite and a cooling agent. Preferably, the mat (4) is coated with the liquid composition including the fireproof additive using a roller.