ELASTIC LAYERS

Jürgen Widler CONICA AG

San Francisco 9.10. – 10.10.2014

Components for

Shock Pads & Elastic Layers

Polyurethane binder

OCN NCO n

Polyisocyanat

+ OH HO n

Polyol

+ Temp./ Accelerator

OCN NCO n

Prepolymer/ Binder

Production of Polyurethane binder

Prepolymerisation

Polyaddition

+ H 2 O 2 n OCN NCO n

Prepolymer/ Binder H

N

O

C HO C

O

N

H

n OH

H 2 N NH 2 n

-2 n CO 2

H

N

O

C N

H n

Urea derivative

NCO OCN

Water (humidity)

+

Reaction of Binder

Curing Process

Recycled Granule

Recycled Granule

Granule Sources

Recycled Tires from cars/trucks Technical rubber

+ low price + low bulk density - Poor control of source - Impurities - Ingredients (additives, oil, etc.)

+ EPDM-based material + higher mechanical properties = higher prices = lower availitbility

Recycled Granule

Specification of granule

Sieve curve Dust content Bulk density Color

Mechanical Properties

Influencing components

Mechanical Properties

Influencing components

Contact points – linking bondage Contact points – linking bondage

Mechanical Properties

Influencing components

1-4 mm Granule

sieve curve in mm

tolerated range in %

1 0-5

1.5 3-20

2 15-44

2.25 26-60

2.5 41-78

2.75 60-89

3 75-94

3.5 90-100

4 97-100

4.5 100

Mechanical Properties

Influencing components

binder

Measurements

Mechanical Properties

Relation between binder content and mechanical properties (EN 12230)

Tens

ile s

tren

gth

(N/m

m2)

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0.45

20 % binder 15 % binder 10 % binder 8 % binder

CONIPUR 322

20 % binder

15 % binder

10 % binder

8 % binder

Mechanical Properties I. Impact : aging of granules

Plastic sack 1 a

Mechanical Properties

I. Impact aging of granules

Tens

ile s

tren

gth

(N/m

m2)

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0.45

1 a aged granule new granule

0.34

0.44

CONIPUR 322

1 a aged granule

new granule

Mechanical Properties

II. Pre-Conditioning of aged granule with Solvent (VOC)

Solvent after washing the aged granule

Mechanical Properties

II. Pre-Conditioning of aged granule with solvent (VOC)

Tens

ile s

tren

gth

(N/m

m2)

0

0.1

0.2

0.3

0.4

0.5

0.6

1 a aged granule 1 a aged granule pre washed withVOC

0.34

0.58

CONIPUR 322

1 a aged granule

1 a aged granule pre washed with VOC

Mechanical Properties

III. Pre-Conditioning of aged granule sanded with Quarz

Mixing SBR with Quarz sand

Mechanical Properties

Tens

ile s

tren

gth

(N/m

m2)

III. Pre-Conditioning of aged granule sanded with Quarz

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0.45

1 a aged granule 1 a aged granule roughened withquarz sand

0.34

0.44

CONIPUR 322

1 a aged granule

1 a aged granule roughened with quarz sand

Mechanical Properties

Tens

ile s

tren

gth

(N/m

m2)

IV. Pre-Conditioning of aged granule with activator

0.325

0.33

0.335

0.34

0.345

0.35

0.355

0.36

0.365

0.37

1 a aged granule 1 a aged granule with activator

0.34

0.37

CONIPUR 322

1 a aged granule

1 a aged granule with activator

Summery

INSTALLER - use of: • consistant and tested granule quality

• consistant binder quality

• defined mixing ratio binder / granule

Topics to ensure the quality of Tracks & Pitches for the END-USER based on given Standards/ rules • Pretesting compatibility of binder/ granule used

• On site testing regarding binder share

Thank you for your attention