Sealing material

Details Sealing material Sealing material

B - Operations, Transporting

29

C

400/5746, 400/93

B29C 65/54 (2006.01)

Patent

CA 1337730

A sealing material comprises a polyvinylchloride type resin as a major ingredient, a plasticizer, a thixotroping agent, a powdery filler, an adhesive promoter, and a heat stabilizer, and has a viscosity at low shearing speed of 12,000 to 20,000 cps and a ratio of viscosity at low shearing speed to viscosity at high shearing speed of 1.5 to 2.5. The sealing material is suitably applied to gaps between steel plates joined to each other in a non-contact manner. One such polyvinylchloride type resin is a blend of a particulate resin having a mean particle size of 2 to 3 µm mixed with a particulate resin having a mean particle size of 20 to 30 µm at a mixing weight ratio of 1:1 to 3:1. Ideally, the plasticizer is a high molecular plasticizer, and the powdery filler is one having an oil absorption of 40 to 50 cm3 per 100 g.

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