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Tape 1218
Polyimide Film Tape with Acrylic Pressure-
Sensitive Adhesive for use as Insulation Tape
Data Sheet
Product Description
3M™ Tape 1218 is a one mil polyimide backing with
acrylic adhesive. It is designed for high temperature
applications, in which a solvent resistant backing is
required, used on coils, capacitors and wire harnesses.
• 1 mil polyimide backing
• Acrylic adhesive
• Supplied on 3 inch cores
3M Tape 1218 is available in standard and custom
widths and lengths. Standard length is 36 yards.
• Widths from 1/4” to 23”
• Longer lengths up to several times normal length,
dependent upon width. Check with Customer
Service.
Applications
3M Tape 1218 is used for high temperature electrical
applications in which a tough , thin insulating material
that is solvent-resistant is required for wrapping coils,
transformers, capacitors and wire harnesses. It is also
used as a cover layer material for many types of flexible
printed circuits.
Typical Properties
Properties Typical Value
Adhesive Acrylic Pressure Sensitive
Backing Polyimide
Total thickness 1 3.0 mils / 0.076 mm
Operating Temperature 180°C (356°F)
Adhesion to Steel1 19 oz/in (0.50Kg/in)
Breaking strength 1 30 lbs./in (14 Kg/in)
Insulation Resistance1 >1 x 106 megohms
Elongation1 (% at break) 55 %
Dielectric Breakdown1 6.0 KV
CTI Group IIb
Electrolytic Corrosion Factor 2 1.0
Footnote:
1. Test method ASTM D 1000
2. 3M Test Method-Available on request