초록 ▼

There is provided a method wherein the source material, rubber or vulcanization products is pulverized in an extruder wherein it is first compressed by a force of 0.2 to 0.7 MPa, then subjected simultaneously to a pressure ranging from 0.2 to 50 MPa and a shear force ranging from 0.03 to 5 N/mm2 whi

There is provided a method wherein the source material, rubber or vulcanization products is pulverized in an extruder wherein it is first compressed by a force of 0.2 to 0.7 MPa, then subjected simultaneously to a pressure ranging from 0.2 to 50 MPa and a shear force ranging from 0.03 to 5 N/mm2 while heating the material to a temperature ranging from 80°to 250°C. and then cooling said material to a temperature ranging from 15°to 60°C. The source materials can be used rubber goods, such as used tires and rejects of tire industry, footwear and industrial rubber production.

대표청구항 ▼

A method of making a powder from a source material comprising rubber, rubber vulcanizates and mixtures thereof which comprises compressing the material at a pressure of 0.2 to 0.7 MPa, subjecting the compressed material to a shearing force of from 0.03 to 5 N/mm2 at a pressure of from 0.2 to 50 MPa

A method of making a powder from a source material comprising rubber, rubber vulcanizates and mixtures thereof which comprises compressing the material at a pressure of 0.2 to 0.7 MPa, subjecting the compressed material to a shearing force of from 0.03 to 5 N/mm2 at a pressure of from 0.2 to 50 MPa at a first temperature of from 80°to 250°C. to form a hot-sheared material and subjecting the hot-sheared material to a shearing force of from 0.03 to 5 N/mm2 at a pressure of from 0.2 to 50 MPa at a second temperature of from about 15°to 60°C. to form a cooled powder material.