Polyurethane

Polyurethane

CAST POLYURETHANE ELASTOMERS 'ROLE' TO PLAY IN FERROUS AND NON FERROUS INDUSTRY

Metallurgy is an ancient subject and to get a pure metal in what so ever form has been a target continuously being chased. Metal industry from the stage of naturally occurring ore to finished metal product requires support of other metals and on-metals.

Metal industry often reels under losses with the factors such as,
1. Technique to separate metallic compounds co existing in ore.
2. Contamination of one metal with another.
3. Corrosion of equipment.
4. Logistics/economics.
5. Cost of energy being an important raw material.

Non metals replacing some metal parts was first handled commercially during World War I, when guns and ammunition systems were developed in rubbers such as 'ebonite'. wood rosins, hard gums were used as covers explosive shells, naturally occurring plastic such as 'cellulose' was used for temporary support.

Use of neoprene, nitrile rubbers, further nylon, Teflon, viton polyurethane has been an increasing trend.

In metal industry initially plastics usage was restricted to,
Packaging
Covering, storage supports
Corrosion protective coatings
Insulation
Cushion between to metals

As the demand and need of purified metals was on rise metal industry started gearing up for more efficient ways as, major issues were,
Transportation of hard wear oriented ore
Material handling at every stage
Processing aids where temperature is a consideration.
Conveying of finished products without contamination
Printing and coating over and metal products.

Plastics, and more specifically wear resistant plastics/rubbers or composites were actively researched during World War II. Role of non metals was focused on,
Unavoidable metal-to-metal contact which yields loss in weight due to wearing
Abrasion loss results size deformation.
Contamination due to carrying one metal compound using another one.
Ionic corrosion

Synthetic materials therefore are required to play significant role in this situation because,
1. We have polymers having higher abrasion resistance than metals.
2. We have certain polymers having better resistance to wear-n-tear than rubber and metals too!
3. We have polymers which generate lowest heat due to friction.
4. We have polymers which can be useful as self lubricating type.



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