Process for the production of ultrahigh-modulus polymers

Details Process for the production of ultrahigh-modulus polymers Process for the production of ultrahigh-modulus polymers

B - Operations, Transporting

29

C

18/1180

B29C 55/00 (2006.01)

Patent

CA 1197966

ABSTRACT This invention discloses a continuous process for the production of polymer-polyoxymethylene (POM) having small linear expansion coefficients and high tensile modulus, the process for producing an ultrahigh modulus POM comprising the step of drawing a crystalline polymer continuously under dielectric heating while maintaining the ambient temperature at an elevated temperature by external heating, said ambient temperature being controlled to change from a lower temperature to a higher temperature along the drawing direction of said crystalline polymer with a pre-set temperature gradient. -50-

418315

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