Rubber Manufacture the Cultivation Chemistry Testing And Manufacture of Rubb
Rubber Manufacture the Cultivation Chemistry Testing And Manufacture of Rubb
Hezzleton E Simmons
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The sulphur content was- 10 per cent of the whole mixture. The first tests were made upon Plain Crepe and Smoked Sheet. Both of these showed the optimum cure at three hours. At this point they re- ceived a sample of ' ' Byrne cured' slab, ' ' and when this was tested out it showed the " optimum cure " at one- hour and fifteen minutes. Here we have a rubber which cures an hour and forty-five minutes more quickly than plain or smoked sheets, and yet is obtained from the same latex. You- may immed...iately realize what this means to the manufacturer of today. Here two questions presented them- selves: (1) Was it due to the Byrne fumes, or (2) the form in which the rubber was prepared? They then prepared what is known as a Byrne Loaf (this is made by rolling sheets, cured by the Byrne fumes around a stick, thus building up a solid cylin- der of superimposed sheets) ; this rubber never completely dries in this; form and has to be creped and dried before vulcanizing. The results on> this loaf, and also upon pressed sheet.
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