URSG-Unvulcanised
Rubber Strip Gum

The Unvulcanized Rubber Strip Gum (URSG) or cushion/bonding gum is a critical component used in the retreading process. It is used as an adhesive between the vulcanized tread (PTR) and the tyre casing which is vulcanized in the retreading process. The quality of URSG decides the strength of the bond between pre-cured tread rubber and tyre casing, low quality URSG renders weak bonds, which lead to separation between casing and PTR and results to a tyre failure. Based on different market needs we have a range of products in the URSG category- IN30, IN 40 & IN50, details are shared below-

IN 30

ADVANTAGES:

• Strong bonding between casing and tread
• Cost effective retreading
• Protection against casing failure
• Increases casing retreadibilty

TECHNICAL SPECIFICATIONS

• Curing temperature: 99 -101 ºC
• Curing time: 220 minutes

To be used for chamber only

IN 40

ADVANTAGES:

• Strong bonding between casing and tread
• Shorter curing time
• Designed especially for cooler running

TECHNICAL SPECIFICATIONS

Chamber:

• Curing temperature: 125 - 127 ºC
• Curing time: 150 minutes

Bonder:

• Curing pressure: 60 - 80 PSI
• Curing time: 130 minutes

Recommended for chamber

IN 50

ADVANTAGES:

• Shortest curing time
• High retreading productivity
• Sustains good bonding strength at high temperatures in service

TECHNICAL SPECIFICATIONS

Chamber:

• Curing temperature: 120 - 125 ºC
• Curing time: 120 minutes

Bonder:

• Curing pressure: 60 - 85 PSI
• Curing time: 90 minutes

Recommended for both chamber & bonder