Paper X, XX, XXX Reinforced Phenolic Laminate Tubes-  3/8" Wall Thickness

Paper X/XX/XXX Reinforced Phenolic Tubes - natural (tan)
This grade is composed of a paper base impregnated with a phenolic resin binder. It has good electric strength properties with fair mechanical strength. Outstanding for use as template material and or backup material.
Certifies to 

X MIL-I-24768/12 PBM, IEC 60893-3 Type 4 PF CP 201
XX MIL-I-24768/11 PBG, IEC 60893-3 Type 4 PF CP 203
XXX MIL-I-24768/10 PBE, IEC 60893-3 Type 4 PF CP 201

NEMA grades X, XX and XXX Paper Reinforced Phenolic -- natural color is typically light tan to brown. These grades are composed of a paper base impregnated with a phenolic resin binder. (Phenolics are the oldest, best-known general purpose thermoset resins. They are among the lowest in cost and easiest to process. Phenolics are quite adequate for a fair percentage of electrical applications. Generally speaking, they are not equivalent to epoxies in resistance to moisture, humidity, dimensional stability, shrinkage and retention of electrical properties in extreme environments.) The paper reinforced phenolic has good electric strength properties with fair mechanical strength and are outstanding for use as template material and/or back-up material. 

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Phenolic Chemical Resistance Chart

XX Paper Phenolic Tube Technical Data Sheet