Their present capacity is 5, TPA. However, the constraints in respect of technology absorption faced by Indian NTC industry are: Dippickup Heat shrinkage and heat shrinkage force. Each of these materials has its own merits and demerits.
The company had installed indigenously developed equipment for conversion of polymer waste to granules of spinnable grade. In practice, howevr, fast curing is not realisable in case of heavy duty tyres as the thicklayer of tread rubber will get distortedby fast curing.
Shri Ram Fibres Ltd. Developments in Extraction and Drying: In this area also, batch type extraction and drying process have been replaced by continuous processes.
The major constraint faced by manufacturers of indigenous equipments and spares are: The present trend is to look to the East for technology compatible with that of western countries as it is more economical, although of late, they too are becoming expensive.
The production of NTC in India started in with tonnes and increased to around 23, tonnes in Other improvements are in yarn solidification and quenching process, spin finish application methods etc.
Unitika offers continuous polymerisation process having a pre-polymeriser coupled with continuous extraction, washing and drying of chips. Nitrogen gas is required for blanketing, drying and conveying of polymer.
Copper complexes as halides, acetate, phosphates, salts of higher fatty adds like stearates, palmitates, laurates, etc. Hence, till the units who have LOI go into production, imports of caprolactam is unavoidable.
As a part of modernisation and expansion programme they have installed spin-draw machines. Nitrogen gas is required for blanketing, drying and conveying of polymer. The molten filaments are quenched or cooled by a laminar flow of air.
However, some radial passenger car tyres have also been introduced in the market. To make it suitable for the purpose of tyre cord, stabilisers are added. Though, indigenous technology comprising of batch polymerisation and conventional spinning process have been developed, none of the NTC plants in India has yet started with such indigenous technology.
Performance of all the collaborations is satisfactory. There are two major types of nylons used as tyre cord, i. These have sophisticated yarn sensing and monitoring systems and hence the quality of yarn is much better with higher throughput.
Subsequently, the company commenced production of nylon tyre cord in in technical 8 collaboration with Unitika. More efficient large capacity spinning equipments are being used in the world. The specifications are given in Table 4. Organic polymer coating, internally, ofVK tube reactors.
This would result in higher output and also higher productivity. All the three polymerisation reaction steps are equilibrium reactions. Some important features of these technology suppliers are described in subsequent paragraphs: These have sophisticated yarn sensing and monitoring systems and hence the quality of yarn is much better with higher throughput.
Their present installed capacity is 2, TPA. As mentioned earlier, cost of production of Indian NTC industry is higher due to small capacity plants based on older technologies.
Development in the polymerisation process. Radial tyre or belted tyre designs take adavantage of these different requirements by placing different types of cords in the belt and in the carcass. The polymer chips are melt in extruder. Thereafter rayon became popular.
New and better type of additives and catalysts development at international level should be incorporated by the Indian companies. Not only tyre, they produce other rubber products like conveyor belts and toys.
1. 3 Tyres: The tyre cord fabric provides the tyre its fundamental properties such as shape, size, load carrying capacity, abrasion resistance, fatigue resistance, etc.
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