摘要:
There is provided a seal member which is used in a seal part associated with sliding, comprising a molded rubber article produced by vulcanizing a rubber composition comprising, a hydrogenated nitrile rubber (A), carbon black (B), and carbon black (C) and/or carbon fiber (D), wherein carbon black (B) has a DBP oil absorption of 250 to 450 mL/100 g, carbon black (C) has a DBP oil absorption of 200 mL/100 g or less, and carbon fiber (D) has an average fiber length of 0.05 to 2 mm and an average fiber diameter of 5 to 30 µm; and wherein, based on 100 parts by mass of the hydrogenated nitrile rubber (A), the amount of carbon black (B) is 5 to 15 parts by mass, the total amount of carbon black (C) and/or carbon fiber (D) is 3 to 35 parts by mass, and the total content of the fillers is 40 parts by mass or less. The seal member thus provided has proper hardness and excellent moldability and wear resistance.
摘要:
A cork stopper used for sealing a container opening and a production method for the cork stopper. The cork stopper comprises a cork stopper body having a molded cork body and a synthetic resin outer layer covering an outer circumference of the molded cork body, the synthetic resin outer layer being made of a synthetic material treated with a roughening process on its surface. The cork stopper body is set to a freely rotatable jig and is rotated together with a transcribing mold with a concave-convex surface by pressing the transcribing mold onto the outer circumference of the cork stopper body while rotating the transcribing mold, thereby transcribing the concave-convex onto the surface of the synthetic resin outer layer.
摘要:
An objective of the present invention is to provide a method for producing a cork stopper by compression molding cork grains, which can provide a cork stopper excellent in sealability and safety. There is provided a method for producing a cork stopper, comprising: mixing cork grains and an adhesive; compression molding the mixture to give an intermediate; and then heating the intermediate to expand the cork grains.
摘要:
A method for processing a rubber surface and a sealing member treated with the method. In the first mode, a rubber surface is formed with a large number of small dimples in a regularly dotted pattern by irradiating laser beams from a laser irradiation device. In the second mode, a skin layer of the rubber surface is removed by irradiating laser beams from the laser irradiation device. In the third mode, the first mode and the third mode are combined. A sealing member comprises rubber including a seal lip part for elastically and slidably contacting a counterpart member, wherein a sliding contact surface of the seal lip part contacting the counterpart member is treated with one of the first, the second and the third modes of the method for processing a rubber surface.
摘要:
A cork molded product (the present cork molded product) according to an aspect of the present disclosure is obtained by mixing cork particles and a polylactic acid dispersion liquid and then compression-molding a mixture of the cork particles and the polylactic acid dispersion liquid. The present cork molded product preferably contains 100 parts by mass of the cork particles and 0.4 to 25 parts by mass of polylactic acid. In the present cork molded product, it is also preferable that the polylactic acid dispersion liquid contains an aqueous medium.
摘要:
A cork stopper used for sealing a container opening and a production method for the cork stopper. The cork stopper comprises a cork stopper body having a molded cork body and a synthetic resin outer layer covering an outer circumference of the molded cork body, the synthetic resin outer layer being made of a synthetic material treated with a roughening process on its surface. The cork stopper body is set to a freely rotatable jig and is rotated together with a transcribing mold with a concave-convex surface by pressing the transcribing mold onto the outer circumference of the cork stopper body while rotating the transcribing mold, thereby transcribing the concave-convex onto the surface of the synthetic resin outer layer.