Roll with an Elastic Roll Cover in a Paper or Board Machine

An elastic roll cover bonded to a roll used for manufacturing or finishing of a fiber web, comprising:

• at least one layer of an isotropic rubber mixture, which isotropic rubber mixture incorporates synthetic fiber polyamide-based polymers in powder form, the isotropic rubber mixture forming the elastic roll cover;
• wherein the isotropic rubber mixture is a vulcanized isotropic rubber mixture forming the elastic roll cover, which isotropic rubber mixture incorporates:
• an elastomeric matrix of olefin-based rubber with:
• synthetic fiber polyamide-based polymers in powder form, comprising 10 to 30 parts of weight to 100 parts of weight of the elastomer matrix;
• wherein the glass transition temperature of the synthetic fiber polymer in powder form is greater than 160° C.;
• wherein the largest dimension of a particle of the synthetic fiber polymer in powder form forming the elastic roll cover is essentially 50 μm to 150 μm;
• wherein the density of the synthetic fiber polymer in powder form is 1.4 to 1.5 g/cm3;
• and
• wherein fillers are of 50-100 parts of weight to 100 parts of weight of the elastomer matrix, and less than 10 parts of weight of UHMWPE to 100 parts of weight of the elastomer matrix;
• wherein additives are also present in the isotropic rubber mixture.