Automotive Filter Polyurethane Adhesive
Automotive Filter Polyurethane Adhesive
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Automotive filter polyurethane adhesive is a specialized adhesive crucial for the production and assembly of automotive filters.
1. Basic Definition
It is a type of polyurethane - based adhesive formulated to meet the strict requirements of automotive filter manufacturing. Polyurethane adhesives contain urethane groups (－NHCOO－) or isocyanate groups (－NCO) in their molecular chains, giving them unique bonding properties.
It is a type of polyurethane - based adhesive formulated to meet the strict requirements of automotive filter manufacturing. Polyurethane adhesives contain urethane groups (－NHCOO－) or isocyanate groups (－NCO) in their molecular chains, giving them unique bonding properties.
2. Key Properties
Strong Bonding Strength: It forms robust bonds with various filter materials like filter paper, plastics, metals, and composites. This ensures the filter structure remains intact under vehicle vibrations, temperature changes, and air flow impacts.
Strong Bonding Strength: It forms robust bonds with various filter materials like filter paper, plastics, metals, and composites. This ensures the filter structure remains intact under vehicle vibrations, temperature changes, and air flow impacts.
Flexibility & Durability: Adapts to different thermal expansion coefficients of filter components. Maintains elasticity to withstand engine - induced vibrations and repeated air - pressure cycles, preventing cracks or detachment.
Chemical & Temperature Resistance: Resists automotive fluids (oils, coolants) and withstands temperature extremes in engine bays (from cold starts to high - heat operations), ensuring long - term filter performance.
Chemical & Temperature Resistance: Resists automotive fluids (oils, coolants) and withstands temperature extremes in engine bays (from cold starts to high - heat operations), ensuring long - term filter performance.
Environmental Compatibility: Many modern formulations have low VOC (volatile organic compound) emissions, aligning with automotive industry environmental regulations.
3. Applications in Automotive Filters
Filter Element Assembly: Bonds filter media (e.g., paper, synthetic fibers) to plastic or metal end caps, creating a tight seal to prevent unfiltered air leakage.
3. Applications in Automotive Filters
Filter Element Assembly: Bonds filter media (e.g., paper, synthetic fibers) to plastic or metal end caps, creating a tight seal to prevent unfiltered air leakage.
4. Manufacturing & Usage Advantages
Versatility: Works with diverse filter materials (porous media, smooth plastics/metals), streamlining production.
Curing Efficiency: Can cure at room temperature or with moderate heating, fitting different production workflows.
Performance Consistency: Ensures uniform adhesion, critical for consistent filter efficiency and long - term reliability.
Versatility: Works with diverse filter materials (porous media, smooth plastics/metals), streamlining production.
Curing Efficiency: Can cure at room temperature or with moderate heating, fitting different production workflows.
Performance Consistency: Ensures uniform adhesion, critical for consistent filter efficiency and long - term reliability.
Items | Part A | Part B | |
Before curing | Appearance | white | brown |
Viscosity（mPa.s） | 22000±5000 | 200±50 | |
Density（g/cm3） | 1.70±0.05 | 1.22-1.25 | |
Use ration by weight A:B | 6：1 | ||
Specification | Viscosity after mixing （mPa.s） | 3500±500 adjustable | |
Operation time（min，25℃） | 30 adjustable | ||
Turnover time（min，25℃） | 150 adjustable | ||
Curing time(h，25℃) | 24 | ||
After curing | Light yellow | ||
Shear strength（N/mm） | 19.85 | ||
Max peel force（N） | 990.63 | ||
Max peel strength（N/mm） | 99.06 | ||
Average peel force（N） | 717.77 | ||
Average peel strength（N/mm） | 71.78 | ||
Min peel force（N） | 455.87 | ||
Min peel strength（N/mm） | 45.59 | ||
