SELF-ADHESIVE ACOUSTIC AND SEALING PATCH 4420
SELF-ADHESIVE ACOUSTIC AND SEALING PATCH
A pressure-sensitive elastomeric-based adhesive patch that combines excellent adhesion, sealing and noise barrier properties.
Features
- Excellent adhesion to many substrates
- Effective noise barrier patch
Structure
Properties
| COLOR |
Black |
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| FACING |
Permanent PE laminate, parchment paper, or removable release liner |
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| SOLID CONTENT |
95% minimum by weight |
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| SHELF LIFE |
Minimum 3 months @ 35°C |
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| SPECIFIC GRAVITY |
1.41 typical |
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HARDNESS
(ASTM D-5) |
6.5 - 9.0 mm |
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| ACOUSTIC PERFORMANCE |
The noise reduction is a function of material mass per unit area. Material thickness should be set to provide desired sound transmission loss. Patches at 2 mm thick are widely used over sheet metal holes. |
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| ADHESION CHARACTERISTICS |
When subjected to a 90° peel at a rate of 300 mm/min on a 25 mm wide test specimen, the material has strength >56.4 N (22.6 N/cm) after the following: |
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5 minute dwell |
2 weeks @ 70°C |
2 weeks @ 100% RH & 37.8°C |
3 week environmental cycle |
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| REPOSITIONABILITY After Bake |
The material can be repositioned shortly after being applied (1-2 minutes) and still meet above adhesion characteristics. |
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| ELEVATED TEMPERATURE |
Withstands automotive bake cycles and maintains properties. |
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| DEAD LOAD |
The material will show no evidence of sagging or pulling away from panel when a 34 g weight is attached to a 25 x 150 mm strip with the assembly hanging vertically for 24 hours. |
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| MOLD RESISTANCE |
No odor or mold development was evident after 2 weeks at 100% RH & 37.8°C. |
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FLEXIBILITY/
CONFORMABILITY |
The material will remain flexible and conformable at temperatures as low as -30°C. |
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| FLAMMABILITY |
Meets FMVSS 302, self-extinguishing |
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