摘要:
A high specific-gravity EPDM composition consisting of a mixture of EPDM containing diene at less than 4.5 wt% and ethylene at not less than 58 wt% nor more than 80 wt% and having a Mooney viscosity ML 1+4 not less than 50 nor more than 170 at 125°C and a powdery material, containing powder whose specific gravity is not less than 12 as a main component thereof, added to the EPDM at not less than 80 wt% nor more than 97.5 wt% of a whole amount of the high specific-gravity EPDM composition.
摘要:
A high specific-gravity EPDM composition consisting of a mixture of EPDM containing diene at less than 4.5 wt% and ethylene at not less than 58 wt% nor more than 80 wt% and having a Mooney viscosity ML 1+4 not less than 50 nor more than 170 at 125°C and a powdery material, containing powder whose specific gravity is not less than 12 as a main component thereof, added to the EPDM at not less than 80 wt% nor more than 97.5 wt% of a whole amount of the high specific-gravity EPDM composition.
摘要:
A method for producing a formed product of deproteinized natural rubber latex capable of reducing a content of an allergen in a natural rubber latex material to a level sufficient to keep the latex from being harmful to the human body without decreasing yields of the product and deteriorating formability of the latex. In the method, cleaning removal of a non-rubber content is carried out after each of protein decomposition, prevulcanization and forming. An aqueous alkali solution, ammonia, water containing free chlorine in an amount of 0.005 to 0.02% by weight or alcohol-water mixed liquid containing alcohol in an amount of 5 to 80% by weight is used as cleaning liquid for the cleaning removal. The method is suitably applied to production of a natural rubber product such as a rubber glove, a condom, a catheter, a foam rubber material and the like.
摘要:
An elastic wheel comprises a circumferentially extending rim for supporting a tire, a disk fixed to an axle, a damper member disposed between the rim and the disk and made of elastic material for absorbing vibration, and a protecting member made of elastic material and covering the damper member.
摘要:
A high specific-gravity EPDM composition consisting of a mixture of EPDM containing diene at less than 4.5 wt % and ethylene at not less than 58 wt % nor more than 80 wt % and having a Mooney viscosity ML 1+4 not less than 50 nor more than 170 at 125° C. and a powdery material, containing powder whose specific gravity is not less than 12 as a main component thereof, added to the EPDM at not less than 80 wt % nor more than 97.5 wt % of a whole amount of the high specific-gravity EPDM composition.