Basalt Fiber Waterproof Coil Resolving Adhesion Flatness Trade-off
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Solution Overview
Problem
Existing baseless modified asphalt waterproofing coiled materials face issues with peeling strength, construction difficulty at 45°C, and reduced waterproofing performance due to gaps between the coiled material and the base layer, resulting in reduced bonding strength and wrinkling after paving.
Innovation Solution
A baseless modified asphalt waterproofing coiled material using basalt fiber with a composition of 40-45 parts asphalt, 15-20 parts softening oil, 4.5-5.5 parts high-temperature tackifier, and 27-33 parts filler, where the high-temperature tackifier is compounded from styrene-butadiene-styrene (SBS) and styrene-butadiene rubber (SBR), and basalt fiber chopped filaments coated with a silane impregnating agent, simplifying the preparation process and enhancing the material's strength and flatness during uncoiling at 45°C.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If more binder is added to improve peeling strength, then bonding strength is improved, but uncoiling performance deteriorates due to excessive adhesion at 45°C
Solution Approach 1:
The patent introduces a specific parameter - the glass transition temperature (Tg) of the binder - and controls it to be 60-90°C to resolve the contradiction. By changing the thermal parameter of the binder, the material exhibits different adhesive behaviors at different temperatures: low adhesion at 45°C for easy uncoiling, and high adhesion at service temperature for strong bonding
Solution Approach 2:
The binder's adhesive properties are made dynamic through temperature dependence. The binder transitions from a low-adhesion state during uncoiling to a high-adhesion state during service, allowing the same material to satisfy contradictory requirements under different conditions
2Strength
If binder thickness is increased to improve bonding strength, then adhesion is improved, but construction flatness deteriorates due to wrinkles and folds
Solution Approach 1:
The patent changes the thermal parameter (glass transition temperature) of the binder to 60-90°C, which allows thin binder layers to provide sufficient bonding strength while maintaining construction flatness. The elevated Tg ensures the binder remains firm during construction to prevent wrinkles, yet provides adequate adhesion
3Manufacturing precision
If binder thickness is decreased to improve construction flatness, then ease of paving is improved, but bonding strength deteriorates due to insufficient adhesion
Solution Approach 1:
The patent raises the glass transition temperature of the binder to 60-90°C, which enables thin binder layers to maintain firmness during construction (ensuring flatness) while providing sufficient bonding strength at service temperature. The thermal parameter change allows thin layers to outperform thick layers
4Ease of manufacture
If high heating temperature is used to improve material processing, then preparation is facilitated, but energy consumption increases and baseless product strength deteriorates
Solution Approach 1:
The patent changes the glass transition temperature parameter of the binder to 60-90°C, which allows the material to be processed at lower temperatures while achieving the desired bonding performance. This parameter optimization reduces energy consumption and prevents degradation of the baseless product structure
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 improves the coiled material's uncoiling ease, reduces wrinkles and gaps, enhances bonding strength, and simplifies the production process while maintaining high performance in heat resistance, aging, and water resistance, achieving better compatibility and durability.
Implementation Method 1
basalt fiber chopped filaments coated with a silane impregnating agent
Implementation Method 2
high-temperature tackifier is compounded from styrene-butadiene-styrene (SBS) and styrene-butadiene rubber (SBR)
Data Source
AI summary
A baseless modified asphalt waterproofing coiled material based on basalt fiber is provided by the present application, including a composition coated on a surface of a coiled material; according to 100 parts by weight, the composition includes: 40-45 parts of asphalt, 15-20 parts of softening oil, 4.5-5.5 parts of high-temperature tackifier, 3.5-4 parts of basalt fiber chopped filament and 27-33 parts of filler.