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Ensinger PEI

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3M 8421 Polyester Tape
Categories: Polymer; Tape

Material Notes: 3M™ Polyester Tape 8421 is for photographic industry for splicing most film for processing through the developing chemicals.

Information provided by 3M

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Physical PropertiesOriginal ValueComments
Thickness 1.40 milBacking; ASTM D3752
 2.50 milTotal; ASTM D3752
 
Mechanical PropertiesOriginal ValueComments
Tensile Strength at Break 125.6 MPaASTM D3759
Elongation at Break 140 %ASTM D3759
Peel Strength 3.125 pliAdhesion to Steel; ASTM D3330
 
Thermal PropertiesOriginal ValueComments
Maximum Service Temperature, Air 66.0 °C
 
Descriptive Properties
Adhesive TypeRubber with pigment
AppearanceCreamy white

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