How different Insulating Kraft Paper Sleeves -a spiral or convolute winding paper tube and vulcanized fiber tube?

How different Insulating Kraft Paper Sleeves -a spiral or convolute winding paper tube and vulcanized fiber tube?

How different Insulating Kraft Paper Sleeves -a spiral or convolute winding paper tube and vulcanized fiber tube? spiral convolute winding kraft paper tube is made of Insulating Kraft Paper Sleeves after slitting, dipping in insulating resin, and curing by high-temperature spiral rolling. Hardened fiber paper tube is 100% cotton pulp […]

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