Hot Water Curing

Availability of extra blind flanges for hot water curing... 

Autoclave curing Open steam curing Hot water curing Self-vulcanizing Cold bond lining and... 

Hot water cures can be used for articles that are not affected by immersion in hot water. This method is useful for thick walled articles and rubber lined equipment and especially most suitable for ebonite compositions. Direct contact with water produces better heat transfer than with hot air or steam. Consequently this system gives less deformation of products during cure. 

Hot water cure - A method for curing rubber in hot or boiling water. Colloquial. 

Hot air, steam, and hot water vulcanisation is widely used in the latex industry, and fluid-bed heat transfer and electronic microwave curing has also been used. Cross-linking by electron radiation has been experimentally used, but has not yet been developed commercially. 

As with the amine systems such systems still suffered the disadvantage that water was split out during cure. This led to the availability in the late 1970s of peroxide-curable materials containing a cure site of enhanced receptivity to attack by aliphatic radicals. These peroxide-cured elastomers are claimed to have superior resistance to steam, hot water and mineral acids than the earlier systems. 

P.B1.25 is very fast in application it is fast to fats, oils, soap, and paraffin, which makes it a suitable candidate for packaging inks. Its lightfastness, however, is not excellent. In natural rubber, P.B1.25 tolerates curing very well, and it bleeds neither into the rubber nor into the fabric backing (Sec. 1.8.3.6). In rubber, the pigment is fast to cold and hot water, to soap, soda, and alkali solutions, and to acetic acid. 

Thick walled tubes are built-up to the required thickness of say 25 to 50mm from calendered sheets of about 1 mm thickness and the same is wrapped with wet cloth which gives additional pressure when shrunk, thus giving better consolidation. The tubes are built up on mandrels. The preferred method of curing is by using hot water. 

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