High-performance silicone-based formulation offering excellent adhesion to low-surface-energy substrates including fluoropolymers and siliconized release liners.
Outstanding thermal stability with continuous service capability up to 200 °C and short-term resistance to 250 °C.
Consistent pressure-sensitive tack and clean debonding behavior across wide temperature and humidity ranges.
Low extractables and minimal outgassing — suitable for demanding electronics, medical device, and aerospace assembly environments.
Compatible with solvent-based and UV-curable coating processes; enables high-speed roll-to-roll conversion.
Flexible printed circuit (FPC) bonding and shielding tapes in consumer electronics.
High-temperature masking tapes for powder coating and automotive paint bake operations.
Thermal interface materials (TIM) attachment layers in LED lighting and power electronics modules.
Medical-grade sensor fixation tapes requiring biocompatibility and skin-friendly peel performance.
Aerospace interior trim bonding where flame, smoke, and toxicity (FST) compliance is critical.
| Chemical Type | High-purity addition-cure silicone polymer |
| Product Form | Solvent-based adhesive solution (typically supplied in toluene/ethyl acetate blend) |
| Appearance | Clear to slightly amber viscous liquid |
| Primary Applications | High-temperature PSA tapes, thermal management bonding, electronics assembly |
| Key Features | Low surface energy adhesion, thermal resilience, low extractables, clean removal |
| Benefits | Reduces delamination risk in thermal cycling, supports ISO 10993-compliant processing, enables high-yield converting |
| Storage Conditions | Store at 15–25 °C in sealed containers; protect from moisture and direct sunlight |
| Shelf Life | 12 months from date of manufacture when stored under recommended conditions |
Q1: What substrates does DOWSIL 7647 PSA bond well to?
A: DOWSIL 7647 exhibits strong adhesion to a broad range of low-surface-energy substrates including polyolefins (e.g., PP, PE), PET, silicone-coated papers, and various elastomers. Performance may vary depending on surface cleanliness, energy, and pretreatment—plasma or corona treatment is often recommended for optimal bond strength on inert plastics.
Q2: Is DOWSIL 7647 suitable for high-temperature applications?
A: Yes—DOWSIL 7647 is a silicone-based pressure-sensitive adhesive designed for elevated temperature performance. It maintains cohesive integrity and tack retention during short-term exposure up to approximately 200 °C and provides reliable service at continuous use temperatures up to 150 °C, depending on substrate and application conditions.
Q3: How is DOWSIL 7647 typically supplied and processed?
A: DOWSIL 7647 is supplied as a solvent-based, ready-to-use adhesive solution. It is commonly applied via conventional coating methods such as gravure, reverse roll, or slot-die coating, followed by controlled solvent drying. Formulators should verify compatibility with existing production lines and ensure adequate ventilation and solvent recovery systems are in place.
Q4: Does DOWSIL 7647 require post-application curing?
A: No—DOWSIL 7647 develops full pressure-sensitive functionality after solvent removal and ambient conditioning. Unlike thermally cured silicones, it does not require additional heat or UV activation to achieve initial tack or long-term adhesion performance.
Q5: Can DOWSIL 7647 be used in medical or food-contact applications?
A: DOWSIL 7647 is not specifically formulated or certified for direct food contact or implantable medical device use. For regulated applications, customers must conduct full regulatory assessment—including biocompatibility testing and compliance verification—based on their specific end-use, processing, and regional requirements.
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E-mail: wangxingqiang@ericwchem.com
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