Concentrated Latex is derived from Field Latex and is processed using centrifuge methods. It contains 60 percent Dry Rubber Content (DRC). There are two main types of concentrated Latex available in the market and these are the High Ammonia or Standard Ammonia Concentrate (HA Latex) and the Low Ammonia Concentrate (LATZ).
High Ammonia Latex Concentrate (HA Latex) -This is the most common grade of latex used worldwide and after compounding has wide applications in manufacture of dipped products like medical gloves, industrial gloves, rubber thread, balloons, condoms etc. It is also used as an adhesive in many different types of industrial applications such as for carpet backing etc.
Low Ammonia Latex Concentrate (LATZ) – This is centrifuged natural latex concentrate which is preserved with low ammonia with other preservatives. The ammonia content of LATZ is not exceeding 0.29%. LATZ can replace HA Latex in all normal latex applications, with a little adjustment in compounding in certain cases. LATZ is preserved with 0.2% ammonia together with a suitable combination of zinc oxide (ZnO) and tetramethylthiuram disulphide (TMTD) of not more than 0.05% in total, based on latex weight. It is more commonly used whenever lower levels of ammonia content are preferred such as in enclosed spaces.
Concentrated Latex is packed or shipped in three main ways. The first is in steel drums of net weight 205kg/drum. A 20’FCL can carry 80 drums with a net weight of 16.4 m/tons. The second method of packing is in disposable or non-returnable flexi-bags in containers carrying approximately 20m/tons per 20’ container. A third method of transporting latex is through returnable or leased iso-tanks.