초록 ▼

The invention relates to a method of preparation of an outer cover of a fusion roller for a xerographic machine, this cover being constituted by a homogeneous layer covering a hollow metal core receiving heating means. According to the invention, this method comprises the steps of (a) cold kneading

The invention relates to a method of preparation of an outer cover of a fusion roller for a xerographic machine, this cover being constituted by a homogeneous layer covering a hollow metal core receiving heating means. According to the invention, this method comprises the steps of (a) cold kneading a mixture having, for 100 parts of fluorine-containing rubber, 55 to 60 parts of carbon black, 2 to 6 parts of magnesium oxide, 4 to 8 parts of calcium hydroxyde and 0 to 2 parts of polyethylene wax; (b) forming the covering material by extrusion or calendering of this mixture; (c) application of this material in a homogeneous layer to the surface of the metallic core of the roller; (d) vulvanization at elevated temperature and under pressure of the material thus applied to the core; (e) dressing of the cover to a constant thickness.

대표청구항 ▼

A method of preparation of an external cover of a fusion roller for a xerographic machine, said cover being constituted by a homogeneous layer covering a hollow core receiving heating means, said method comprising the stages of: (a) cold kneading a mixture having, for 100 parts of a rubber of a fluo

A method of preparation of an external cover of a fusion roller for a xerographic machine, said cover being constituted by a homogeneous layer covering a hollow core receiving heating means, said method comprising the stages of: (a) cold kneading a mixture having, for 100 parts of a rubber of a fluorine-containing elastomer, 55 to 60 parts of carbon black, 2 to 6 parts of magnesium oxide, 4 to 8 parts of calcium hydroxide and 0 to 2 parts of polyethylene wax, (b) forming said mixture by extrusion or calendering into a cover material, (c) application of said cover material in a homogeneous layer to the surface of said core of said roller, (d) vulcanisation at elevated temperature and under pressure of said cover material thus applied onto said core, (e) dressing of said cover to a constant thickness. A vulcanizable composition for a covering material for a fusion roller for a xerographic machine, said vulcanizable composition formed of a mixture having, for 100 parts of rubber of a fluorine-containing elastomer, 55 to 60 parts of carbon black, 2 to 6 parts of magnesium oxide, 4 to 8 parts of calcium hydroxide and ½to 2 parts of polyethylene wax.