Categorized under the Polyester & Specialty Tapes portfolio, 3M 851ST and 3M 852ST are high-reliability green polyester masking tapes designed for demanding applications such as PCB fabrication, electroplating, and chemical etching. They provide excellent resistance to harsh chemicals, heat, and mechanical stress, making them suitable for high-performance masking processes.
The tapes feature a durable PET film backing with a distinctive translucent green appearance. The polyester film offers high tensile strength, puncture resistance, and dimensional stability, while providing clear visibility for accurate manual or automated masking and alignment.
3M 851ST: Features a specialized high-tack adhesive designed to provide secure bonding and reliable masking on various surfaces, helping prevent chemical seepage and undercutting during plating and chemical treatment.
3M 852ST: Uses a specialized adhesive formulation designed for reliable masking, clean removal, and stable performance during high-temperature processing.
With excellent chemical and thermal resistance, 3M 851ST and 3M 852ST can withstand exposure to demanding electroplating and chemical treatment environments, including nickel, gold, and copper plating processes, as well as elevated temperatures during subsequent processing.
Key Technical Advantages (3M High-Temp Polyester Masking Benefits)
Deploying 3M 851ST and 3M 852ST High-Temp Polyester Masking tapes across electronics assembly lines guarantees critical process reliability and defect reduction:
Zero Undercutting & Liquid Seepage: The thick adhesive layer actively flows into low-profile surface contours, creating a continuous seal that prevents plating solutions and chemical etchants from creeping underneath gold fingers or sensitive contacts.
Clean Residue-Free Stripping : Engineered to peel away smoothly in a single continuous strip post-plating or post-baking, leaving zero sticky adhesive residue or ghosting on copper or gold-plated surfaces.
Superior Chemical Resistance: Impervious to common PCB processing chemicals, including chromic acid, ferric chloride, nitric acid, and cyanides, ensuring the substrate underneath remains fully pristine.
High Contrast Green Color Identification: The translucent green backing allows quick inspection of masked areas, helping operators easily spot air bubbles or gap misalignments before entering processing tanks.
TDS
| Product Specification | 3M 851ST | 3M 852ST |
|---|---|---|
| Product Category | Polyester & Specialty Tapes | Polyester & Specialty Tapes |
| Masking Classification | High-Temp Polyester Masking | High-Temp Polyester Masking |
| Backing Carrier Material | Polyester (PET) Film | Polyester (PET) Film |
| Backing Color | Translucent Green | Translucent Green |
| Total Tape Thickness | 0.100 mm (4.0 mil) ±10% | 0.090 mm (3.5 mil) ±10% |
| Backing Thickness | 0.025 mm (0.9 mil) | 0.025 mm (0.9 mil) |
| Adhesion to Steel | ≥ 9.0 N/25 mm (33 oz/in) | ≥ 8.0 N/25 mm (29 oz/in) |
| Tensile Strength | ≥ 110 N/25 mm (25 lbs/in) | ≥ 110 N/25 mm (25 lbs/in) |
| Elongation at Break | ≥ 100% | ≥ 100% |
| Operating Temperature Range | Up to 121°C (250°F) continuous; short-term peak 177°C (350°F) | Up to 121°C (250°F) continuous; short-term peak 177°C (350°F) |
Primary Application Fields
3M 851ST and 3M 852ST are engineered for demanding industrial surface treatment and electronics fabrication environments:
Printed Circuit Board (PCB) Electroplating Masking: Masks precious metal contact pads, gold fingers, and board edges during acid copper, tin-lead, and nickel/gold plating procedures.
Chemical Etching & Anodizing Barrier: Protects delicate metal parts and printed wiring boards from harsh chemical etching agents during circuit pattern delineation.
Powder Coating & High-Temp Paint Masking: Serves as a crisp line masking barrier for metal housings, brackets, and electronic enclosures subjected to high-temperature powder coating bake cycles.
Splicing of Silicone Treated Papers & Films: Acts as a high-tack splicing tape for silicone-coated release liners, plastic films, and web converting materials undergoing high tension or chemical exposure.
STK Tape offers specialized converting and slitting capabilities for 3M 851ST and 3M 852ST master logs:
Precision Custom Roll Slitting: STK custom-slits 3M master logs into narrow or wide roll widths (e.g., 6mm, 12mm, 19mm, 25mm, 50mm, 500mm) with razor-sharp edges to prevent edge tearing during manual application.
Precision Die-Cut Masking Shapes: Converts 3M 851ST and 852ST into continuous die-cut dots, custom window frames, and specialized geometric shapes on release liners for fast assembly line placement.
Factory-Direct Wholesale Pipeline: Streamlines your procurement with consistent inventory reserves, avoiding extended lead times while securing authentic 3M product quality.
Our factory & Equipment
Custom Adhesive Tape Solutions
We provide comprehensive adhesive tape customization and converting services, including custom thickness, size, core, packaging, release liners, and die-cutting solutions to meet your specific application requirements.
Custom Thickness
Custom thickness of adhesive tape is available according to customer's request.
Custom Size
Custom width/length of adhesive tape is available according to customer's request.
Custom Core
Custom core diameter of adhesive tape is available according to customer's request.
Custom Package
Custom package of adhesive tape is available according to customer's request.
Custom liner
Adhesive tape with release liner is available according to customer's request.
Die-cut Service
Die-cutting of adhesive tape is available according to customer's request.
Manufacturing & Delivery Process
Coating Adhesive
Rewinding Roll
Cutting Roll
Quality Inspection
Roll Packing
Delivery
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