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High Tensile Strength Glass Cords

High Tensile Strength glass is manufactured from either K or U glass filament as opposed to traditional E glass. The difference in formulation produces glass fibre with improved physical properties.

NGF is the only glass cord manufacturer that can produce high tensile strength glass cord from fibre forming to finished product. This can be done in both the Japanese and UK facilities.

The use of High Tensile Strength glass gives the belt designer two directions to improve the performance of a belt in comparison with E glass:

Option 1 :

If the cord is required to have the same Tensile Strength properties as E glass then the cord diameter can be reduced. By using less glass, there are fewer filaments to abrade, and less hysterisis energy generated within the glass. These reduce the level of heat build up within the belt. Thus, a high strength glass belt will run at a lower temperature, and give a longer life.

Option 2:

If the cord is required to keep the same diameter, then the high strength glass increases the load bearing capacity of the belt allowing the belt to cope with high shock loads.

The following table quantifies the benefits high strength glass brings to two belts of similar tensile properties, one by using cords of reduced diameter and one by using narrower belt width.

 
Option 1
Option 2
Increased Belt Life by Reduced Cord Diameter
Increased Design Freedom by Reduced Belt Width
Basic Parameters
E
HTS
E
HTS
Number of ends
13
11
11
11
Cord diameter mm
1.20
0.95
1.10
0.95
Inter-cord gap mm
0.170
0.170
0.170
0.170
Cord tensile N
1130
1050
930
1050
Belt width
25
25
25
22
Cords per belt width
18.3
22.3
19.7
19.6
Available tensile kN
18.4
21.3
16.5
18.5
Glass Cord density tex
1750
990
1480
990
Glass Cord wt/m of belt g
31.9
22.1
29.1
19.5
REDUCTION IN CORD WEIGHT
30.8%
33.3%

HTS gives belt designers greater opportunities to overcome the ever-increasing demands of automotive engines, and to progress the technology of synchronous belts in a cost-effective manner.

High Tensile Strength Glass Cords are designed to suit customers' individual needs.