TECHNICALLY SPECIFIED

Eield latex and field coagulum are the source materials for all varieties and grades of dry natural mbber that include the conventional International grades as weH as the Technically Specified Rubbers (TSR). 

The first three grades of SMR were technically specified in terms of guaranteed cleanliness SMR 5 with a guaranteed cleanliness level of 99.95% SMR 20 a guaranteed cleanliness level of 99.8% SMR 50 a guaranteed cleanliness level of 99.5%. 

SMR is not only technically specified clean. It is dehvered clean because it is film-wrapped, in small convenient bales. 

This is the generic name for the scheme originally introduced in Malaysia as Standard Malaysian Rubber (SMR). In effect it is the same specification but apphed to rubber produced in other countries, e g., Standard Indonesian Rubber (SIR). Both SMR and SIR are Technically Specified Rubbers. 

The Malaysian rubber industry has, however, played a pioneering role in producing NR grades to technical specifications, and this system is being followed by other producer countries. Currently the following countries sell technically specified grades ... 

The tool preparation station receives its orders, initially originated by the CAD data processing system, via the FMS network and technically specified by the CAM system in the form of a production rule base. Order data arriving at the tool preparation station include the following ... 

The book is primarily intended as a reference for those directly concerned with testing rubbers, whether it be for quality control, evaluation of products, production of design data or research, and for students of rubber technology. However, it is believed that it will also be of considerable value to those indirectly involved in testing such as design engineers and technical specifiers. 

Figure 14.8 Flow diagram for processing latex and field coagulum into technically specified rubber.

Global natural rubber consumption is split among tires (75%), automotive mechanical products (5%), nonautomotive mechanical products (10%), and miscellaneous applications such as medical and health-related products (10%). Since the 1960s, the quality and consistency of natural rubber has improved, primarily because of the implementation of standard specifications defining a range of grades of rubber. Natural rubber is available in three basic types technically specified rubbers, visually inspected rubbers, and specialty rubbers. 

Technically specified rubber is produced from intentionally coagulated and crumbled field latex, which is converted to a blanket and dried in an air circulating drying oven at 110-125°C. 

Natural rubber (technical specified rubber, TSR20) phr — 10.00 20.00 30.00 40.00... 

The NR plantation industry has evolved over the years from a largely agro-based industry to that of a multibillion dollar business that provides technically specified industrial feedstock for diverse industries making rubber products. 

The non-rubbers and non-rubber particles present in fresh field latex are considered contaminants that are detrimental to the quality of the product made from them. This is particularly true for the presence of residual rubber proteins in NR products, particularly medical gloves. Purification of the field latex is thus absolutely necessary before the latex can be converted into a technically specified feedstock. 

Centrifuged high ammonia (HA) latex concentrate is the most common technically specified latex concentrate available in the market. A bank of... 

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