Sunday, 16 August 2009

CHLORO BUTYL

Chlorobutyl is an elastomeric isobutylene-isoprene copolymer (halogenated butyl) containing reactive chlorine.

Main Properties

Chlorobutyl has the predominantly saturated backbone of butyl, it has many of the attributes of the butyl molecule:

  • Low permeability to air, gases and moisture
  • Vibration damping
  • Low glass transition temperature
  • Resistance to aging and to weathering from atmospheric exposure
  • Wide vulcanization versatility
  • Fast cure rates
  • Processing safety: no nitrosamines or nitrosamines precursors

Monday, 9 February 2009

TYRE SIZE DESIGNATION


BIAS TYRE
Ex:5.90-15 6PR





5.90 - Thickness of Tyre from shoulder to shoulder is 5.90 inches

15 - Rim diameter 15 inches

PR - Ply Rating - Means Maximum recommended load which the Tyre can carry



RADIAL TYRE


Ex:185/60 R14 82H


185 - Thickness of Tyre from shoulder to shoulder is 185 mm.

60 - Aspect ratio* is 60%.

R - Means Radial Tyre.

14 - Wheel rim diameter 12 inches.

82 - Load index is 82. The maximum load a Tyre can carry.

H - The Speed symbol. Maximum speed of Tyre.



* ASPECT RATIO


Aspect Ratio - Ratio of section height to section width








Wednesday, 4 February 2009

TYRE

TYRE

  • It carry the vehicle weight
  • It transfers the traction and braking force
  • It changes and maintain the direction of travel
  • it absorbs Road Shock

Tuesday, 3 February 2009

ADVANTAGES OF RADIAL TYRES OVER BIAS TYRE


BETTER SAFETY: The braking efficiency of radial tires on wet roads is better due to stiffer tread and greater side wall flexibility.

BETTER CONTROL: On turning, a radial Tyre has less tendency to distort and lift off the road from one side. Thus, there is better contact of Tyre and hence stability

LESS PUNCTURE TENDENCY: The Radial tires are provided with dual steel belts due to which there is a less tendency of puncture

LOWER FUEL CONSUMPTION: The rolling resistance of radial Tyre is owe due to which sidewall rigidity and stiffer tread

GREATER RESISTANCE TO WEAR: Less slip and less internal losses life of Tyre increased


The advantage of bias ply Tyre over Radial Tyre is smoother ride at low speed of the vehicle