Method for making an elasticised yarn and fabric manufactured from said yarn

A method for making an elasticised yarn, comprising:

• prearranging a source of a roving of a 100% natural fibre, wherein said roving has a linear mass density set between 0.1 Nm and 50 Nm;
• prearranging a source of an elastic fibre;
• feeding said roving to a stretching unit at a first speed v1;
• extracting said roving as stretched roving from said stretching unit at a second speed v3>v1;
• unwinding said elastic fibre;
• conveying said elastic fibre to an overlapping unit at a third speed v2;
• jointly pulling said elastic fibre and said stretched roving, downstream of said overlapping unit, by a ring spinning unit, by making a spool of said elasticised yarn,
• wherein said elastic fibre includes:
• natural rubber having a polyisoprene 1,4-cis content larger than 80%;
• sulphur as a vulcanisation agent at a weight concentration in said natural rubber set between 0.5% and 3.0%;
• a vulcanization accelerator and a vulcanization activator;
• an anti-tacking agent;
• an antioxidant agent;
• and
• a stabilisation agent;
• and
• wherein said elastic fibre is obtained from a longitudinally cut flat yarn of said natural rubber so as to obtain said elastic fibre in the form of an elastic thread having a linear mass density set between 50 dtex and 1000 dtex.