3M 1218

Harmonization Code : 3506.91.90.99 | Prepared glues and other prepared adhesives, not elsewhere specified or included; products suitable for use as glues or adhesives, put up for retail sale as glues or adhesives, not exceeding a net weight of 1 kg ; Adhesives based on polymers of headings 3901 to 3913 or on rubber; Other ; Other

3M 1218

Main features

  • 180 deg C Continuous Operation
  • Thin High-Temperature Insulation
  • Flexible-Circuit Cover Layer

Product Description

3M Polyimide Film Electrical Tape 1218 combines a 0.025 mm polyimide film backing with a non-corrosive acrylic PSA in a 0.080 mm tape for high-temperature electrical insulation. Rated under its UL listing for continuous operation up to 180 deg C, it provides minimum dielectric breakdown of 5500 V; insulation resistance is at least 1 x 10^12 ohm by ASTM D1000 at 23 deg C. The amber tape wraps coils, capacitors, transformers, wire harnesses, and leads, and also serves as a cover layer for flexible printed circuits or a solder mask during printed circuit board assembly.

Key features

  • 180 deg C operation: The tape is designed for continuous operation not exceeding 180 deg C under its UL listing.
  • Thin insulation profile: The construction combines 0.025 mm polyimide backing with 0.080 mm total tape thickness.
  • No-preparation adhesive: The acrylic pressure-sensitive adhesive requires no heat, moisture, or solvent preparation for application.

Applications

Applications include wrapping coils, capacitors, transformers, wire harnesses, and leads; solder masking; and cover-layer use on flexible printed circuits.

Product Family

3M 1218

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Adhesive Layer
A layer that is applied to one surface or both to bind items together and resist their separation
Pressure Sensitive Acrylic
Total Thickness
Total thickness is taking into account all the films, coatings, adhesives, release liners and special layers and is the maximum thickness of a film or tape.
76 μm
Thermal Properties
Operating Temperature
180 °C
Mechanical Properties
Adhesion Strength
Adhesion is the bond strength measurement of a coating to a substrate. When an adhesive is bonded to an item or surface, numerous physical, mechanical and chemical forces come into play, which may have an effect on each other.
19 Oz/in
Elongation
Elongation is the process of lengthening something. It is a percentage that measures the initial, unstressed, length compared to the length of the material right before it breaks. It is commonly referred to as Ultimate Elongation or Tensile Elongation at break.
55 %
Electrical Properties
Breakdown Voltage
Breakdown voltage is the minimum voltage necessary to force an insulator to conduct some amount of electricity. It is the point at which a material ceases to be an insulator and becomes a resistor that  conducts electricity at some proportion of the total current.  After dielectric breakdown, the material may or may not behave as an insulator any more because of the molecular structure alteration. The current flow tend to create a localised puncture that totally alters the dielectric properties of the material. This electrical property is thickness dependent and is the maximum amount of voltage that a dielectric material can withstand before breaking down. The breakdown voltage is calculated by multiplying the dielectric strength of the material times the thickness of the film.
6,000 V

Additional Information

Technical properties

As-supplied / before-processing properties

PropertyValueUnitMethod / condition
ColorAmber-Visual
BackingPolyimide film-As supplied
AdhesiveAcrylic-Non-corrosive pressure-sensitive adhesive
Backing thickness1 / 0.025mil / mmNominal
Total thickness3.15 +/- 0.2 / 0.080 +/- 0.005mil / mmASTM D1000 at 23 deg C
Shelf life5yearsFrom manufacture; 10 to 27 deg C and less than 75% RH
Technical properties

Final-state / after-processing properties

PropertyValueUnitMethod / condition
Continuous operating temperature180deg CMaximum under UL listing
Dielectric breakdown5500VMinimum; ASTM D1000 at 23 deg C
Insulation resistance1 x 10^12ohmMinimum; ASTM D1000 at 23 deg C
Electrolytic corrosion factor1.0-3M ETM-54001; 1.0 equals no observed corrosion
Adhesion to steel14 / 1.5oz/in / N/cmMinimum; ASTM D1000 at 23 deg C
Breaking strength20 / 35lb/in / N/cmMinimum; ASTM D1000 at 23 deg C
Elongation50%Minimum; ASTM D1000 at 23 deg C
Flame retardancyPass-UL 510A

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