8985L 3M | Alldatasheet

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February, 2020 3M™ Anodization Masking Tape 8985L Product Description 3M™ Anodization Masking Tape 8985L is a purple printed polyester tape with a rubber adhesive and non-silicone release liner. Designed specically for masking parts against chromic anodization bath processes. Product Features

  • Strong backing provides excellent abrasion, tear, scratch, puncture and moisture resistance to help protect surfaces.
  • The purple translucent backing allows for visual inspection without tape removal.
  • Provides good initial tack and holding strength.
  • Rubber adhesive specially formulated to resist the harshest of chemical bath chemistries and provide clean removal when nished.
  • Non-silicone adhesive allows use on many parts where subsequent painting or bonding is necessary.
  • Non-silicone liner allows for die-cuts.

3M™ Anodization Masking Tape 8985L Technical Information Note The following technical information and data should be considered representative or typical only and should not be used for specication purposes. Typical Physical Properties Property Values Method Color Purple Printed Total Tape Thickness 0.099 mm 3.9 mil ASTM D3652 Backing Thickness 0.076 mm 3 mil ASTM D3652 Backing Polyester Adhesive Rubber Liner Polyester Liner Thickness 0.051 mm 2 mil ASTM D3652 Typical Performance Characteristics Property Values Method Dwell/Cure Time Substrate Notes 180° Peel Adhesion

2.5 N/cm 23 oz/in ASTM

12 in/min (300 mm/min) Tensile Strength 1234 N/100mm 70 lb/in ASTM D3759 Elongation at Break 131 % ASTM D3759 Temperature Use Range Up to 93 Up to 200

3M™ Anodization Masking Tape 8985L Available Sizes Property Values Standard Roll Length 65.8 m 72 yd Handling/Application Information Application Ideas

  • Masking during anodization operations. Application Techniques Surface Preparation
  • Clean surfaces prior to masking, such as alkaline clean and deoxidize.
  • Improve masking success by chemlm surface prior to masking. Masking
  • Optimal adhesion is obtained when both the tape and intended surface are within a temperature range of 60° to
  • To apply the tape, remove a portion of the liner from one end of the tape and rmly tack it down to the surface. Gently pull liner away from tape at an angle as it is being applied by hand.
  • Once the tape has been applied, rmly apply pressure to improve bond strength to surface. Additional tools (wipers, rollers, etc.) may be needed to achieve proper bond.
  • Squeegee out any air bubbles that may be trapped between the tape and the surface. Special attention to masking edges for better sealing from chemicals. Removal Techniques
  • Allow masking tape to dwell greater than four hours after part processing before removal. Plotter Suggestions
  • Plotter Test Plot: Imperative to test and verify that the blade cuts all the way through the tape
  • Plotter Pressure: Validate pressures are set to cut through the tape (backing and adhesive) to the liner. Pressure settings may need to be increased depending on the thickness of the product and what material was run on the plotters previously.
  • Blade Angle: 45 or 60 degree angle preferred
  • Blade Adjustment: If the blade is too far into the housing it isn't exposing enough blade to cut through down to the liner. Adjust the blade to expose more in order to cut through the material.
  • Fresh Blade: Blades need to be routinely changed in order to remain sharp to cut through the material correctly.
  • Plotter Maintenance: Routine maintenance should be performed on plotters when inconsistent cuts are observed. (cutter protection strip, blade holder, etc)

3M™ Anodization Masking Tape 8985L Storage and Shelf Life Store under normal conditions of 60° to 80°F (16° to 27°C) and 40 to 60% relative humidity in the original packaging material. To obtain best performance, use this product within 12 months from date of manufacture. Trademarks 3M is a trademark of 3M Company. This product was manufactured under a quality system registered to ISO 9001 standards.

3M™ Anodization Masking Tape 8985L Information Technical Information: The technical information, guidance, and other statements contained in this document or otherwise provided by 3M are based upon records, tests, or experience that 3M believes to be reliable, but the accuracy, completeness, and representative nature of such information is not guaranteed. Such information is intended for people with knowledge and technical skills sucient to assess and apply their own informed judgment to the information. No license under any 3M or third party intellectual property rights is granted or implied with this information. Product Selection and Use: Many factors beyond 3M’s control and uniquely within user’s knowledge and control can aect the use and performance of a 3M product in a particular application. As a result, customer is solely responsible for evaluating the product and determining whether it is appropriate and suitable for customer’s application, including conducting a workplace hazard assessment and reviewing all applicable regulations and standards (e.g., OSHA, ANSI, etc.). Failure to properly evaluate, select, and use a 3M product and appropriate safety products, or to meet all applicable safety regulations, may result in injury, sickness, death, and/or harm to property. Warranty, Limited Remedy, and Disclaimer: Unless a dierent warranty is specically stated on the applicable 3M product packaging or product literature (in which case such warranty governs), 3M warrants that each 3M product meets the applicable 3M product specication at the time 3M ships the product. 3M MAKES NO OTHER WARRANTIES OR CONDITIONS, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OR CONDITION OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR ARISING OUT OF A COURSE OF DEALING, CUSTOM, OR USAGE OF TRADE. If a 3M product does not conform to this warranty, then the sole and exclusive remedy is, at 3M’s option, replacement of the 3M product or refund of the purchase price. Limitation of Liability: Except for the limited remedy stated above, and except to the extent prohibited by law, 3M will not be liable for any loss or damage arising from or related to the 3M product, whether direct, indirect, special, incidental, or consequential (including, but not limited to, lost prots or business opportunity), regardless of the legal or equitable theory asserted, including, but not limited to, warranty, contract, negligence, or strict liability.

3M™ Anodization Masking Tape 8985L 3M United States 3M Center St. Paul, MN 55144-1000 800-362-3550 www.3M.com Please recycle. © 3M 2021. All Rights Reserved. The brands listed above are trademarks of 3M