850 



THE INDIA RUBBER WORLD 



August 1, 1921 



turers all over the world, and has been so regarded for nearly 

 half a century. 



Among the prominent producers of reclaimed rubber exhibit- 

 ing was the North Western Rubber Co., whose product is of 

 international repute and in active request where rubber manufac- 

 ture is an important industry. 



Shortly before the close of the exhibition the trophies, medals, 

 and other prizes were presented to the winners by Professor 

 Wnidham R. EHinstan, president of the exhibition. A complete 

 report of the awards will be published in a forthcoming issue. 



enters the second, or air chamber, to prevent any sulphuring, and 

 then passes through the third chamber similar to the first. Its 

 passage through this chamber is three times as long as through 



PEACHEY PROCESS DEMONSTRATION PLANT 



AN experimental plant and laboratory has been installed by 

 The Peachey Process Co. at 380 Highroad, Willesden. 

 London, \. VV., and it is now in successful operation for the dem- 

 onstration of the process in all its adaptations. The process was 

 made one of the features of the recent Fifth International Rub- 

 ber E.xhibition in London. 



The Willesden plant is equipped with mixing and calendering 

 machinery, stationary curing pans and a series of vertical cham- 

 bers for continuous curing of material in long lengths. ."Vs is well 

 known, the process eflfects vulcanization without heat or pressure 

 by exposing the rubber, tirst to sulphur dioxide gas, and then to 

 hydrogen sulphide. The former is purchasable in liquid form in 

 steel cylinders. The latter is made in a gas-producing plant on 

 the premises from iron sulphide and hydrochloric acid and stored 

 in an oil-sealed gas holder. 



OPERATION OF PROCESS 



The process as applied in the stationary pan consists in placing 

 the articles on wooden racks in the pan, which is then tightly 

 closed. Separate inlets are provided for the admission of each 

 gas to the pan, and an outlet connected with an absorber out- 

 side the plant. To effect the cure sulphur dioxide under the re- 

 quired pressure is admitted to the pan for ten minutes to saturate 

 the rubber. The excess gas is then expelled by compressed air, 



View of G.\s Absorbers 



and hydrogen sulphide is admitted and held for 30 minutes to 

 finish the process of curing, no heat or extra pressure being 

 required. 



CONTINUOUS VULCANIZATION 



The chambers for continuous vulcanization arc so arranged that 

 the rubber-coated materials enter at one end of the apparatus, 

 passing first through a chamber, festooned over rollers geared 

 to run at the same speed to avoid strain on the fabric. The rate 

 of passage through the apparatus is such that during its passage 

 from entrance to exit the rubber is fully cured. The material 

 having been saturated with sulphur dioxide in the first chamber 



Al'PAR.VTUS FOR CONTINUOUS VuLCANIZ.-\TI0N 



the first, as the chamber is fitted with more festooning rollers. 

 By this means the exposure to each of the gases is properly timed. 

 From the last chamber the fabric is received on a suitable wind- 

 up roller in a finished condition. 



ANNUAL REPORT OF THE STRATHMORE RUBBER CO., LIMITED 



The Strathmore Rubber Co., Limited, 46 Charlotte Square, 

 Edinburgh, was incorporated March 27, 1920, taking over the 

 business of the former company of the same name. From the 

 report of this firm for the year 1920 the following items are taken : 



The total acreage of the rubber estates in the Federated Malay 

 States is 2,354 acres. The yield of rubljer has been satisfactory, 

 and the factories are reported in excellent condition. A substan- 

 tial part of the year's crop was sold for delivery at Singapore. 

 The acreage planted with Hevea rubber is as follows : 



Strathmore L'lu Duloh Sunge[ R.^wang 



When Planted Estate Estate Estate Totals 



In bearing: Acres Acres Acres .\cres 



1906 to 1914 580 732 1,312 



Not in bearing: 



1915 90 90 



1916 115 207 322 



1918-19 295 295 



1919 (Dtcrca;ee) 253 253 



Total planted 580 937 755 2,272 



L'nplanted area (includ- 

 ing biiil'Jins sites, etc.) 4Vi 50 7J^ 62 



Total' acreage 584'A 987 762)4 2,334 



For i)urp<jses of comparison with the results obtained by the old 

 company during the previous five years, the following statement 

 of figures is given : 



