Bulk rubber and rubber covering of Tongxin

The basis of composition of "Tongxin" is made by liquid rubber and a high-quality rubber crumb.
STRUCTURE OF MATERIAL

The monolithic synthetic covering consisting of polyurethane;
frost-resistant;
biostable;
waterproof.
COVERING THICKNESS

For trainings - 6 mm

For competitions - from 11 to 17 mm.
DESCRIPTION OF MATERIAL
DATA
INDICATORS

Composition basis
liquid rubber

System for hardening
polyisocyanate, glycerin

Quantity of layers
2

Thickness of the lower (draft) layer
from 6 to 12 mm

Thickness of the top (fair) layer
3 mm

Surface
3 mm of powder of a rubber crumb

Size of granules
3 - 5 mm

Primary colors
red, green

TECHNICAL CHARACTERISTICS
DATA
TESTING
MEASUREMENT MEASURE
INDICATORS

Hardness on Shora And
DIN 53505
conventional unit.
40 - 75

Frost resistance (flexibility on a core)

°C
≤-55

Deborah's criterion (injury prevention)


0,85 - 1,1

Preservation of durability
When aging 100 °s*336ch

%
80 - 120

At boiling in water during 168 h

%
80 - 100

Extent of swelling in 15% to sulfuric acid

%
from 4 to 6

Extent of swelling in water solution of table salt (30%)

%
0,6 - 1,0

Resistance to alkaline hydrolysis, solution of a caustic natr (30%)

%
0,85

Specific indicator of attrition
GOST 426-77
m3/tdzh
80 - 100

Coefficient of change of properties after radiation UV (a lamp of DRL, 300 h)
On durability

%
100 - 110

On relative lengthening

%
80 - 100

Durability of coupling with asphalt concrete

MPa
0,4 - 0,8