Product Introduction
The 3M™ Diamond Microfinishing Film Sheet 669L provides superior precision and surface control for finishing hard materials. Constructed with synthetic diamond abrasives on a flexible polyester film backing, it ensures consistent, durable results in high-demand polishing and deburring tasks.
3M™ Diamond Microfinishing Film Sheet 669L Features:
- Synthetic diamond abrasives for high-precision finishing
- Full resin bond enhances strength and longevity
- 4 mil flexible polyester film backing for improved handling
- No non-slip coating for increased flexibility
- Electrostatically aligned abrasive grains for consistent results
- Available in 15, 30, 45, and 60 micron grades
3M™ Diamond Microfinishing Film Sheet 669L Applications:
- Removal, deburring, and polishing of hard materials
- Ideal for applications requiring superior surface finishes
- Used in precision machining and industrial finishing
About Prostech
Prostech Philippines is a one-stop solution provider for specialty materials and equipment across electronics manufacturing, from PCBA to final assembly. Our core material and equipment solutions include:
- PCB Assembly Materials
- Cleaning & Degreaser
- Circuit Board Protection
- Thermal Management Solutions
- EMI Shielding
- General Assembly Adhesives
- Elastomeric Materials
- Process Equipment: Potting & Coating Systems, UV/ Heat Curing, Plasma Treatment, Tape placement automation, and cleaning machines
Technical Added Value to customer
Prostech offers customized material and process equipment solutions with engineering support throughout R&D, production process optimization, and performance validation. Our in-house lab located in Alabang, Muntinlupa is equipped to conduct electronics material testing, application simulation, and adhesive validation, helping customers reduce the need for onsite trials and accelerate implementation.
International Supply Chain Advantage
Regional warehouse hubs across Vietnam, Singapore, Malaysia, and the Philippines ensure cross-border reliable supply. In Philippines PEZA-bonded warehouse located at Lima Industrial Park, Batangas enables Prostech to provide responsive, demand-based delivery and significantly shortens standard lead time for Philippines customers.
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Typical Properties
| Property | Value |
|---|---|
| Abrasive Material | Diamond |
| Application | Finishing, Surface Finishing, Automotive, Coating Removal, Fine Finishing |
| Backing Material | Polyester Film |
| Backing Thickness (Imperial) | 4 mil |
| Brands | 3M |
| Coat Type | Open Coat |
| Equipment – Machines | Hand Sanding, Sanding Blocks |
| Industries | AOEM, Aerospace, Primary Metal |
| Micron Grade | 15 μm, 30 μm, 45 μm, 60 μm |
| Product Color | Dark Gray |
| Product Form | Sheet |
| Sub Applications | Coating Finish Prep/Repair, Coating Removal, Fine Finishing, Finishing, Flat Finishing |
| Sub Industries | Turbine Engines, Coating Sanding, Aerospace, Automotive, Plating & Polishing |
| Vacuum Support | No |
| Wet or Dry | Wet |
