| 摘要 |
<p>1484342 Coagulating rubber latex RUBBER RESEARCH INSTITUTE OF MALAYSIA BOARD OF 29 Aug 1975 [2 Sept 1974] 38321/74 Heading C3C [Also in Division B5] Raw solid natural rubber in bulk form is produced by a method comprising the steps of: (1) passing a continuous stream of fresh or preserved natural rubber field latex through a heat exchanger in which the heating medium is maintained at a temperature of 100‹ to 300‹ C., so as to raise the temperature of the latex to from 60‹ to 110‹ C., whereby gelation of the rubber is caused to take place rapidly; (2) optionally, crumbling the coagulum; (3) drying the coagulum; and (4) pressing and palleting the coagulum to form raw solid natural rubber in bulk. A heat sensitizing agent or an enzyme, e.g. papain, may be added to the latex before gelling. The latex may be passed through pipes surrounded by a heat transfer fluid, or through cut-out sections of two metal plates, held together by mechanical means, which are heated by electrical heating elements and constitute the heating medium.</p> |
