| 摘要 |
<p>A method of reclaiming rubber, consisting essentially of the combination of steps of heating scraps of cured rubber which have been freed of non-rubbery components, the compositions of the scraps being identical or compatible and the size of the scraps being substantially uniform. The heating takes place at a temperature below the curing temperature of the scraps in an autoclave which is heated externally while subjecting said scraps to agitation to effect even mixing and constant movement of said scraps. The heating and agitating of the scraps is undertaken in the presence of water in the form of steam equal to a percentage by weight of the scraps which percentage may vary from 5 to 10% wherein the exact amount of water relative to said scraps is controlled to determine the extent to which the scraps become plastic and in the presence of air, the volume of which is sufficient to effect a pressure within the autoclave of between 10 and 30 atmospheres. The heating and agitating requires for a period of time sufficient to cause the contents of the autoclave to reach a temperature of about 110.degree.C and the treatment continues for a period of time of at least 15 minutes which is a period of time sufficient to plasticize said scraps, the treatment of the scraps taking place at a temperature which is at least 20.degree.C below the curing temperature of the scraps to be reclaimed.</p> |
