Polyurethane Materials
for Vibration Isolation

1 Getzner Materials
in Construction and Industry

Getzner Werkstoffe specialises infoamed polyurethane elastomers,
which are used in the rail, construction
and industry sectors for isolating
vibrations. The company, which hasdeveloped materials such as Sylomer®
and Sylodyn®, has 50 years of experience.

What canGetzner materials do?
Peace and quiet is essential for ahigh quality of life, whether within
one's own four walls or at work in
the office. But there are countlesssources of noise, especially incities. For example, footfall noise
and the noise generated by rail androad traffic, which all have a huge
detrimental effect on the quality oflife and can even reduce the valueof whole properties. Getzner
materials ensure a high quality oflife by decoupling entire buildings,
parts of buildings or even theservice facilities (lifts, air-conditioning equipment, bath tubs,pumps, etc.) from vibrations.

They prevent vibrations frompropagating into sensitive parts ofthe building and generating
disruptive vibrations or noise.
The polyurethane-based materials,
Sylomer® and Sylodyn®, are ideal
for industry, as many industrial
products require load-resilient
elastic components: the materials
are available in any number offorms and combine properties suchas high spring and/or dampening
properties, outstanding elastic
recovery and a long service life.
Getzner materials can also be used
for not only the bedding or damping of components but also forentire machines. Depending on theapplication, they provide a longer
service life (less downtime/maintenance), greater machine
precision, less machine noise, more
comfortable operation, etc.

3

2 Mass-Spring Systems
Calculation Model

One-dimensional mass-springsystem

Physical principle of the mass-spring system
F

Most vibration problems can bephysically represented as one-dimensional mass-spring systems(MFS). This approach allows thebest possible resilient bedding to
be calculated.

mc
Should a brief external force (F)disrupt the balance of a mass (m),the mass will produce a vibration
with the natural frequency f0. The
amplitude of the vibration reduces
over time. How quickly this happens depends on the damping (D)of the spring (c). The extent of thedamping by Sylomer® or Sylodyn®
gives the mechanical loss factor.

DFe

Deviation x

How a mass-spring system works

AnAn+1

T=1/f0Time t4

Elastic shielding of buildings, Arnulfpark,
Munichdrawn regarding the possible
isolating efficiency of the elastic
bearing. Generally speaking, thehigher the frequency ratio f/f 0, thehigher the isolating efficiency. The
natural frequency of the elastic
system can be significantly influenced by two factors: the mass ofthe system and the spring constantor stiffness of the elastic bearing.
How the spring constant C required
to compute the frequency iscalculated is illustrated below. The
modulus of elasticity describes thecorrelation between stress andstrain in the deformation of a solidbody. This value can be found in
the data sheets for the various

The isolating efficiency or insulation provided by a resilient
bearing is represented by thetransmission function V(f).
he transmission function
describes the mathematical
relationship between an effect(excitation amplitudes) on a system
and its response (vibration amplitudes). It is the ratio between thenatural frequency and the excitation frequency (f/f 0). The isolating
efficiency is in the frequency range
f/f0 > √2 (1.41). If the excitation
frequency is known and the natural
frequency of the system has been
calculated, conclusions can then be

Transmission function V(f)T10Vibration protection for
air-conditioning systemη = 0.1

types of Sylomer® and Sylodyn®
product. A further factor affecting
the spring constant is the ratio
between the bearing surface andthe thickness of the material: thethicker the selected elastic bearings, the smaller (softer) the spring
constant. The deflection and theform factor – the ratio between
bearing surface and lateral surface– also have to be taken into
account. Getzner Werkstoffe
engineers are available to assist in
the calculation and selection of theelastic bearing with a view toachieving the optimum vibration
damping and insulation.

ƒ9012πcm

1T

8T = period length in s
ƒ0 = natural frequency in Hz
c = spring constant in N/m
m = vibrating mass in kg765

η = 0.24η =0.33

Isolatingefficiencyof an elastic
bearing

2100

Increase

1√223
Isolating efficiency

45Frequency ratio f/f0cE·Ad

E = dynamic modulus of elasticity
in N/mm2
A = bearing surface in mm2
d = material thickness in mm

5

3 Source or Recipient
Isolation

The effects of vibrations orshocks can be experienced inpractically all aspects of everyday
life: the dashboard in your car
rattles, window panes vibrate
when a train goes by, machine
tools no longer machine workpieces accurately, the rumble of themetro can be heard in a 10th floorapartment.

All these phenomena are derived
from the so-called structure-borne
noise. When fixed bodies start tovibrate, noise propagates throughthem, which then emerges as
secondary airborne noise(rumbling of the metro).
Structure-borne noise can besuppressed in two ways.

1.) Source isolation
Providing an elastic bearing for theinitiator – in other words thesource (motor, air-conditioning
equipment, train, etc.) – to a large
extent prevents the propagation ofstructure-borne noise.
2.) Recipient isolation
Elastic decoupling of the recipient(buildings, space, devices, etc.)prevents structure-borne noisefrom entering and disturbing theoccupiers of the property.

Recipient and source
isolation

64 Standard Materials
Overview

Professional advice isessential

Sylomer®–
Excellent elasticity
and durability

Sylodyn®–High dynamic
durability

Material characteristic:— Mixed-celled construction— Static range of use 0.011 N/mm2 to1.2 N/mm2— Load peaks to 6.0 N/mm2— Insignificant amplitude dependence— Proven long-term performance— Fatigue strength— Optimized range of products(10 standard types) to cover theneeds of calculations for systems— Customer-specific adjustments arepossible

Material characteristic:— Closed-celled construction— Static range of use for standard
product types from 0.075 N/mm2 to12.0 N/mm2— Load peaks to 24.0 N/mm2— Insignificant amplitude dependence— Minimal tendency to creep— Stiffening factor from (Cdyn/Cstat)
1.15 to 1.40
— Proven long-term performance— Fatigue strength— Optimized range of products(8 standard types) to cover the needsof calculations for systems— Customer-specific adjustments arepossible

Universally applicable elastic PU material, spring–damper combination,
proven for more than 50 years
Examples of use:
— As a compression-loaded support
element for vibration isolation inconstruction, rail and equipment
applications— Mass-spring systems, under ballast
mats, under sleeper pads, rail pads,
baseplate pads
— Load bearings for architectural
applications, optional full surface,strips and discrete bearings— Foot fall bearings— Stairs and landings— Bearings of machinery, bearings offoundations— Elastic components for transportrollers and belts— Elastic press mats
— Highly flexible seals— Formed parts, semi-finished flat parts

Special materials
Sylodamp® – high damping(mechanical loss factor 0.46 — 0.61)
Sylomer® Marine FR, Sylomer® FR –fire resistant (S4/SR2/ST2 according
to DIN 5510-2)

Technical spring with pronounced dynamic and highly elastic properties, proven in the field for more than 20 years
Examples of use:
— As a compression-loaded support
element for vibration isolation inconstruction, rail and industry sector— Mass-spring systems, under ballast
mats, under sleeper pads, rail pads,
baseplate pads
— Load bearings for architectural applications, optional full surface, strips
and discrete bearings— Stairs and landings— Bearings of machinery, bearings offoundations— Elastic component for transportrollers and belts— Elastic press mats
— Highly flexible seals— Formed parts, semi-finished flat parts

Products— Acoustic Floor Mat— Acoustic Floor Blocks— Bearings for stairs and landings— Foundation bearings— Elastic ceiling hangers— Elastic bearings in timber
construction— Bearing of machine foundations— etc.

7

5 Overview
Sylomer®

Material
mixed-cell PU elastomer (polyurethane) with combined spring and dampening properties
Standard delivery dimension

Thickness: 12.5 mm / 25 mm
Roll:
1.5 m wide, 5.0 m long
Strip:
up to 1.5 m wide, up to 5.0 m long
Other dimensions, punched and moulded parts on request.

Sylomer® Material type
Material properties

Static range of use in N/mm
Load peaks in N/mm
1SR
18SR
28SR
42SR55

SR110

SR220

SR450

yelloworange

blue

pink

green

brown

red

grey

turquoise winered

0.011

0.018

0.028

0.042

0.055

0.110

0.220

0.450

0.850

1.200

0.50

0.751.00

2.00

2.00

3.00

4.00

5.00

6.00

6.00

0.25

0.23

0.21

0.18

0.17

0.14

0.13

0.12

0.11

0.11

40

40

4555

55

55

55

60

60

60

222

Mechanical loss factor

DIN 53513

Rebound resilience in %EN ISO 8307

Compression set in %EN ISO 1856

32

Static modulus of elasticity 1 in N/mm2<5<5<5<5<5<5<5<5<5<50.06

0.08

0.19

0.22

0.34

0.83

1.47

3.36

7.23

9.37

0.20

0.29

0.42

0.60

0.75

1.52

2.58

5.42

11.08

15.62

DIN 53513 2

Static shear modulus in N/mm2DIN ISO 1827 2

0.04

0.06

0.07

0.09

0.11

0.22

0.38

0.58

0.84

0.94

DIN ISO 1827

20.10

0.12

0.14

0.17

0.20

0.34

0.57

0.82

1.15

1.28

2DIN EN ISO
527-3/5/500 2

0.30

0.35

0.40

0.50

0.55

0.85

1.20

1.70

2.30

2.50

Min. tensile elongation at rupture in %DIN EN ISO
527-3/5/500 2

250

230

200

190

190

180

170

160

150

150

Abrasion 3 in mm3DIN ISO 4649

≤ 1,400≤ 400≤ 1,300≤ 1,200≤ 1,100≤ 1,100≤ 1,000

≤ 400

≤ 300

≤ 350

Dynamic shear modulus in N/mm

Min. tensile stress at rupture in N/mm

Coefficient of friction (steel)Getzner Werkstoffe

0.5

0.5

0.5

0.5

0.5

0.5

0.5

0.5

0.5

0.5

Coefficient of friction (concrete)

Getzner Werkstoffe

0.7

0.7

0.7

0.7

0.7

0.7

0.7

0.7

0.7

0.7

Specific volume resistance in Ω · cm

DIN EN 62631-3-1 2> 1010

> 1010> 1010> 1010> 1010> 1010> 1010> 1010> 1010> 1010

Thermal conductivity in W/mKDIN EN 12667

0.045

0.050

0.050

0.055

0.060

0.075

0.090

0.110

0.130

0.140Temperature range in °C-30 to 70

Temperature peak in °C

short termFlammability

EN ISO 11925-2

4Values apply to shape factor q = 3
Measurement/evaluation in accordance with the relevant standard
The measurement is performed on a density-dependent basis withdiffering test parameters
4
Application-specific
23

SR
1200

Dynamic modulus of elasticity1in N/mm221

SR
850

Test methods

Colour1SR
11120
class E/EN 13501-1
All information and data is based on our current knowledge. The data can beapplied for calculations and as guidelines, are subject to typical manufacturing
tolerances and are not guaranteed. Material properties as well as their tolerances can vary depending on type of application or use and are available fromGetzner on request.
Further information can be found in VDI Guideline 2062 (Association of GermanEngineers) as well as in glossary. Further characteristic values on request.

8

6 Overview
Sylodyn®

Material
closed-cell PU elastomer (polyurethane) with highly elastic properties
Standard delivery dimension

Thickness: 12.5 mm / 25 mm
Roll:
1.5 m wide, 5.0 m longStrip:
up to 1.5 m wide, up to 5.0 m long
Other dimensions, punched and moulded parts on request.

Sylodyn® Material type
Material properties

NBNCNDNE

NF

HRB HS
3000

HRB HS6000

HRB HS
12000

redyellow

green

blue

violetdark green

dark blue

dark brown

0.075

0.150

0.350

0.750

1.500

3.000

6.000

12.000

2.00

3.00

4.00

6.00

8.00

12.00

18.00

24.00

0.07

0.07

0.08

0.09

0.10

0.07

0.07

0.08

70

70

70

70

70

70

70

70

Test methods

ColourStatic range of use in N/mm
1

Load peaks in N/mm
1222

Mechanical loss factor

DIN 53513

Rebound resilience in %EN ISO 8307

Compression set in %3EN ISO 1856

2

Static modulus of elasticity 1 in N/mm2<5<5<5<5<5<5<5<50.75

1.10

2.55

6.55

11.80

33.20

74.00

181.00

Dynamic modulus of elasticity 1in N/mm2

DIN 53513 2

0.90

1.45

3.35

7.70

15.20

49.10

113.80323.00Static shear modulus in N/mm2

DIN ISO 1827 2

0.13

0.21

0.35

0.61

0.80

2.40

3.50

4.00

Dynamic shear modulus in N/mm2

DIN ISO 1827 2

0.18

0.29

0.53

0.86

1.18

2.80

4.20

5.30

Min. tensile stress at rupture in N/mm2DIN EN ISO
527-3/5/100 20.75

1.50

2.50

4.00

7.00

12.00

15.00

16.00

Min. tensile elongation at rupture in %DIN EN ISO
527-3/5/100 2450

500

500

500

500

400

400

400

Abrasion 3 in mm3

DIN EN ISO 4649

≤ 1,400

≤ 550

≤ 100

≤ 80

≤ 90

≤ 100

≤ 80

≤ 70

Coefficient of friction (steel)Getzner Werkstoffe

0.7

0.7

0.7

0.7

0.7

0.7

0.7

0.4

Coefficient of friction (concrete)

Getzner Werkstoffe

0.7

0.7

0.7

0.7

0.7

0.7

0.7

0.6

Specific volume resistance in Ω · cm

DIN EN 62631-3-1 2> 1010

> 1010> 1010> 1010> 1010> 1010> 1010> 1010

Thermal conductivity in W/mK

DIN EN 12667

0.060

0.075

0.090

0.100

0.110

0.160

0.170

0.190

Temperature range in °C-30 to 70

Temperature peak in °C

short termFlammability

EN ISO 11925-2

4

Values apply to shape factor q = 3
Measurement/evaluation in accordance with the relevant standard
The measurement is performed on a density-dependent basis withdiffering test parameters
4Application-specific123120class E/EN 13501-1All information and data is based on our current knowledge. The data can beapplied for calculations and as guidelines, are subject to typical manufacturing
tolerances and are not guaranteed. Material properties as well as their tolerances can vary depending on type of application or use and are available fromGetzner on request.
Further information can be found in VDI Guideline 2062 (Association of GermanEngineers) as well as in glossary. Further characteristic values on request.

97 Application Examples
Construction

Bedding of buildings

HVAC equipment

Screed f loating f loors

Building foundation bearings

Sylodyn® strips for decoupling of the f lanking transmission

Bearing systems for stairs

108 Application Examples
Industry

Decoupling of metal parts using spring
damper elements

Polishing pads

Pump bearing

Sealing element for
vacuum lifting device

Floating f loors for rolling stock

Decoupling of yacht f looring

Machine foundation bearings

11

Getzner Vibration Solutions Pty Ltd
Unit 1 Number 2-22
Kirkham Road West,
Keysborough Victoria 3173
Australia

Getzner Werkstoffe GmbHAm Borsigturm 1113507 Berlin
Germany
T +49-30-405034-00
F +49-30-405034-35
info.berlin@getzner.com

Getzner Werkstoffe GmbH
Middle East Regional OfficeAbdul - Hameed Sharaf Str. 114
Rimawi Center - Shmeisani
P. O. Box 961294
Amman 11196, Jordan
T +9626-560-7341
F +9626-569-7352
info.amman@getzner.com

Getzner Werkstoffe GmbH
Grünwalder Weg 32
82041 Oberhaching
Germany
T +49-89-693500-0
F +49-89-693500-11
info.munich@getzner.com

Getzner India Pvt. Ltd.
1st Floor, Kaivalya
24 Tejas Society, Kothrud
Pune 411038, India
T +91-20-25385195
F +91-20-25385199
info.pune@getzner.com

Getzner Spring Solutions GmbH
Gottlob-Grotz-Str. 1
74321 Bietigheim-Bissingen
Germany
T +49-7142-91753-0
F +49-7142-91753-50
info.stuttgart@getzner.com

Nihon Getzner K.K.
6-8 Nihonbashi Odenma-cho
Chuo-ku, Tokyo
103-0011, Japan
T +81-3-6842-7072
F +81-3-6842-7062
info.tokyo@getzner.com

Getzner France S.A.S.
Bâtiment Quadrille
19 Rue Jacqueline Auriol
69008 Lyon
FranceT +33-4 72 62 00 16
info.lyon@getzner.com

Getzner Materials (Beijing) Co., Ltd.
No. 905, Tower D, the Vantone Center
No. Jia 6, Chaowai Street, Chaoyang District
10020, Beijing, the P.R.C.
T +86-10-5907-1618
F +86-10-5907-1628
info.beijing@getzner.com

Getzner France S.A.S.
19 Rue Hans List
78290 Croissy-sur-Seine
FranceT +33 1 88 60 77 60

Getzner USA, Inc.
8720 Red Oak Boulevard, Suite 400
Charlotte, NC 28217, USA
T +1-704-966-2132
info.charlotte@getzner.com

www.getzner.com

B Materials en © Copyright by Getzner Werkstoffe GmbH | 11-2019

Getzner Werkstoffe GmbHHerrenau 56706 Bürs
Austria
T +43-5552-201-0
F +43-5552-201-1899
info.buers@getzner.com