siegling transilon

conveyor and processing belts

TECHNICAL INFORMATION 2

SPECIAL FEATURES AND PROPERTIES

Contents
2

Introduction

3

Profiles and sidewalls

10	Tongue-mounted andflex-action cleats
11

Modifying belts

12 Top face patterns
14 Belt edge sealing
15 Knife edge belts
16 Curved belts
17 Special belt properties

Siegling – total belting solutions

INTRODUCTION

Siegling Transilon conveyor and processing belts are high-quality
products characterized by their durability, simple handling, freedom
from maintenance and economical operation.
Certain conveying and processing tasks require mechanical, physicalor chemical belt properties which are made possible only by special
production processes, combination of materials or finishing.
For example,– profiles, sidewalls and surface patterns improve the grip properties,– special tension member designs allow usage as knife edge or
curved belt,– NA, HC and SE belts fulfil special requirements in applications.
Important basic information about ­storage, finishing and fitting ofyour Siegling Transilon conveyor and processing belt can be foundin our brochure ref. no. 317 Technical Information 1.





Our web-based Transilon product finder app allows users to find theright conveyor/processing belt for their application quickly and easily.
Users can make the results list more accurate by entering the specifications they are looking for, such as the belt thickness, return diametersand profiles. Even if just a few search terms are added, the app swiftly
generates a list of product names and technical information. The app
can also retrieve product data sheets and brochures with technicalinformation.
The Siegling Transilon product finder
is available at www.forbo.com/movement >E-Tools > Product Finder

Because our products are used in so many applications and because of the individual factors involved, our operating i­nstructions, details and information on the suitability and use of the products are only general guidelines and do not absolve the customer from carrying out checks and tests
themselves. When we provide technical support on the application, the customer bears the risk of the machinery functioning properly.

2

PROFILES AND SIDEWALLS

Conveyor belts equipped with profiles are used for inclined conveyingof bulk goods and small items.
Profiles are available in various shapes and sizes, and in some cases can besupplied as roll material.
Sidewall profiles are used – often in con­junc­tion with lateral profiles –to contain bulk goods on the sides of the belt.

Combinations of materials
Profilematerial

Profiles welded
without
adhesive

Profiles weldedwith adhesive

Side wall
welded with IR

Side wall
welded with HF

V
U
V
U
V
U

from 0.3 mm–from 0.2 mm––from 0.2 mmfrom 0.3 mmfrom 0.3 mmfrom 0.2 mmfrom 0.2 mmfrom 0.2 mmfrom 0.2 mmfrom 0.4 mm–
from 0.4 mm––
from 0.3 mmfrom 0.4 mm–
from 0.4 mm––
from 0.2 mm

0, U0, E0, V1, U1

all

–

yes

–

–

TX0, Y0, S0, UH

all

–

–

–

–

G, P, S, U…H

all

–

–

–

–

E
V
U
V
U

from 0.3 mm––––from 0.3 mm
–
–
yes
–

from 0.3 mm––––from 0.3 mm––––

Top face/
underside
coating
V
V…H
U

E

NOVO

Forbo Siegling accepts no responsibility for any errors or omissions. Ask your contact in our company for details.

3

Coatings
0
E
G
P
S
TX0
U
U1

Fabric uncoated
Polyester
Rubber/elastomer
Polyamide
Silicone
Texglide™
Polyurethane
0.1 mm thickurethane coating
U…H
Polyurethane hard
Polyvinyl chlorideVV1
0.1 mm thick
PVC coating
V…H
Polyvinyl chloride hard
U0, E0, Impregnations
A0, S0,Y0, UHNOVO Polyester felt
(N)

PROFILES AND SIDEWALLS
SpliceFor Siegling Transilon belts with profiles and sidewalls, thesplice types listed in the Technical Information 1 brochure(ref. no. 317) can be used, depending on the belt type.
In swan-neck conveyor belts, because of stiffness aroundthe splice, a stepped Z-splice or overlap splice must be used.

Positioning of profiles
Lateral profiles are usually positioned at a right angle to thebelt edge. For other profile arrangements (e.g. V-shaped or
curved) please note the options shown on the right andspecial dimensions.
With longitudinal profiles the distance from the belt edge tothe middle of the profile (x) must be stated. Longitudinal
profiles can be flush with the belt edge.
Exception: Profiles on U0 surfaces require a gap from thebelt edge of at least 2 mm.
When longitudinal profiles are attached in pairs the distance
between the profile centers (a1) must also be specified.
Please note that the width of the belt material might shrink
due to pretensioning (about 30% of the elongation at fitting
lengthways – see brochure no. 256).

Profile positions
Profile details for v-shaped welded profiles (see fig.)
Angle βBelt length* min.
[mm]

Belt width max.
[mm]

45°
40°
35°
30°
25°
20°
15°
8.5°

5500
5100
4800
4650
4300
3900
3300
2600

1150
1300
1450
1600
1700
1800
1900
2000

* Shorter belt lengths available on request.

No longitudinal profiles can be applied around a longitudinal seam, the distance a1 must be at least 400 mm. If alongi­­­tudi­nal profile must be located in the center of thebelt, then the longi­tudinal seam must be offset by approx.
200 mm to either side of the center.
Box-shaped welded profiles

V-shaped welded profiles

Curved welded profiles

V-shaped welded profiles(sketch of dimensions)

4

m
0 mm
>_ 10 m>_ 1

If profiles on both sides or longitudinal and lateral profiles
combined are needed, please inquire.

Sizes available

Types of profiles

Belt sizes for lateral profiles

Indented longitudinal profiles are avail­able too. To extend service life werecom­mend using whole profiles thatare not indented, as the inden­tation cancause splits at the bottom of the profile.

open belts

endless belts

minimum
belt length

any length

600 mm for belt width ≤ 1000 mm
1100 mm for belt width > 1000 mm

maximum
belt length

any length

any length

minimum
belt width*

50 mm

50 mm

maximum
belt width*

approx. 3200 mm

approx. 3200 mm

Belt sizes for longitudinal profiles on top face
Belt width approx. [mm]Minimum length endless belts** approx. [mm]up to 1200
up to 4700
> 4700700
1900
on request

Further special profiles available on
request.
Please note:
Profiles can mean that belt propertiesare changed. This applies particularly
to types that– are ATEX compliant– have a highly conductive coating(HC)– are flame-retardant (SE/FR)

Belt sizes for longitudinal profiles on underside
Belt width approx. [mm]Minimum length approx. [mm]up to 500
up to 700
up to 1000
up to 1750
up to 2500
up to 4450
> 4450

700
1250
2000
2700
4000
5500
on request

Tolerances of profile
center distances a1

Profile center distancetolerances a2

a1 [mm]Tolerance [mm]50 up to 500
up to 1000
up to 3000
up to 4000
> 4000

± 1.5
± 2.0
± 3.0
± 4.0
± 5.0

Profile center distance tolerances depend
on various parameters, so generalizations
aren’t possible. If necessary, please enquire
about the tolerances that would be possible
in your case.

Belts with profiles on
top face and underside

1-ply types
with splice film reinforced with gauze

Minimum widths
for lateral profiles
for longitudinal profiles

50 mm
a1 + profile width

Larger belt widths on request.
* 	Depending on the profile shape and positioning, guidelines do not have to be kept to or may be exceeded –when using larger profiles or where profiles are positioned particularly narrowly, please consult us.
** 	Please note the manufacturing options d­ epending on the splicing angle – table minimum lengths in brochureref. no. 317, page 6.

5

Recommended splice method

2 + 3-ply types
Z-overlap or overlap splicePROFILES AND SIDEWALLS

h

K
s

s b
h

K

T

b

b

TW

h

h

K

h

ShapesDesignation

s

s
b
h

h

T

b

TW

h

TW

h

K

h

T

b

F

b

h
b

b

b
s

F

Kb

h
b

s

b
s

b

6

10

h

L
h

T

b

b

b

33 x 4033 x 60
46 x 80

F 20 x 3
F 30 x 8

20 x 330 x 8bbhLPolyester Profiles
K 10
K 13
K 17

h

L

10

h

b

b

T

h

K

T

10
h

b

s

L 40
L 60
L 80

6 x 4 x 3.6
10 x 6 x 613 x 8 x 7.5
15 x 8 x 9.5
17 x 11 x 9.5
12 x 20
12 x 30
12 x 40
12 x 50
12 x 60
15 x 630 x 8

b

h

T

h

K K

h

b

20 x 2070 x 60
30 x 4030 x 60
40 x 80

T 20
T 30
T 40
T 50
T 60
F 15 x 6
F 30 x 8

h

K

h

T

s

6 x 4.2 x 4
10 x 6 x 613 x 8 x 7.5
15 x 8 x 9.5
17 x 11 x 9.5
30 x 16 x 18

T 20
T 60
TW 40 1)
TW 60 1)
TW 80 1)Urethane Profiles
K6
K 10
K 13
K 15
K 17

b

b

F

PVC Profiles
K6
K 10
K 13
K 15
K 17
K 30

h

hh

Lb

h

F

b

h

b

b

h

L

h

L

L

b

TW

h

T

b

h

b

Sizes
b x h x s [mm]Profile product range

T 10
LB 20
LB 30
LB 40
LB 50
LB 60

10 x 6 x 613 x 8 x 7.5
17 x 11 x 9.5
12 x 1012 x 20
12 x 30
12 x 40
12 x 50
12 x 60

Permissible operating
temperature [°C]a2 min [mm]
30
30
30
30
30
60

60
60
60
60
60

160
1400
540
710
1250

–10/+70–10/+70–10/+70–10/+70–10/+70

30
100

FDA
FDA
FDA

● 2)
● 2)
● 2)
● 2)
● 2)

90
150
120
150
150

FDA
FDA
FDA

● 2)
● 2)
● 2)

60
60
60

470
600
1200

–10/+70–10/+70–10/+70

80
90
100

80
80
140

FDA
FDA

● 2)
● 2)

60
60

65
260

–10/+70–10/+70

30
40

65
65
65
65
65

25
55
100
120
170

–30/+80–30/+80–30/+80–30/+80–30/+80

● 2)
● 2)

87
87
87
87
87
87
87

140
180
220
250
280
100
290

FDA
FDA
FDA

92
92
92

FDA
FDA
FDA
FDA
FDA
FDA

92
92
92
92
92
92

FDA

FDA

FDA

FDA

FDA
FDA
FDA
FDA
FDA

FDA

*		The d

FDA
FDA
FDA
FDA

FDA
FDA
FDA
FDA
FDA

FDA
FDA
FDA
FDA
FDA

dmin approx. [mm]*top face

Weight approx. [g/m]–10/+70–10/+70–10/+70–10/+70–10/+70–10/+70dmin approx. [mm]*underside

Shore-A-Hardness

25
55
100
120
170
470

a1 min [mm]

Green

60
60
60
60
60
60

Use aslongitudinal profile

dmin approx. [mm]*

White

● 2)
● 2)
● 2)
● 2)
● 2)
● 2)

FDA
FDA
FDA

● 2)
● 2)
● 2)
● 2)
● 2)
FDA
FDA

Use aslateral profile

FDA
FDA
FDA

Transparent

Blue RAL 5015

Blue RAL 5013

Color andphysiological property

30
50
80
90
110
180

30
30
30
30
30
50

40
70
90
90
90
230

30
60
60
60
90
180

70
120

30
45

70
120

50
90

30
30
30
30
30

30
50
80
90
110

30
30
30
30
30

40
70
90
90
90

30
60
60
60
90

–30/+80–30/+80–30/+80–30/+80–30/+80–30/+80–30/+80

30
30
30
30
30
30
40

50
50
50
50
50
70
120

30
45

70
120

50
90

55
100
170

–30/+100–30/+100–30/+100

30
30
30

70
120
140

30
30
30

70
100
110

60
80
90

85
135
180
240
270
290

–30/+100–30/+100–30/+100–30/+100–30/+100–30/+100

30
30
30
30
30
30

70
70
70
70
70
70

min specifications for the belt, the profiles and the sidewall must be taken into consideration when determin­ing the drum diameters.
The largest value is the most important factor and a smaller ­diameter may not be used. The specifications for dmin are standard values determinedat normal ambient conditions (20 °C/50 % humidity). Lower temperatures require larger d­ iameters.
1)		 Can be used only in conjunction with sidewalls.
2)		 Available, but not BfR/EU or FDA ­approved.

7

PROFILES AND SIDEWALLS

Thickness t [mm]Height h [mm]Width w [mm]Spacing p [mm]Shore A hardness

dmin approx. [mm]*Permissible operating temperature [°C]

PVC
FWG 5X40/P67-V60 green
FWG 5X60/P67-V60 green
FWG 5X80/P67-V60 green
FWG 5X40/P67-V60 white FDA
FWG 5X60/P67-V60 white FDA
FWG 5X80/P67-V60 white FDA
FW 5X33/P67-V60 green
FW 5X40/P67-V60-HACCP white FDA
FW 5X60/P67-V60-HACCP white FDA
FW 5X80/P67-V60-HACCP white FDA
FW 5X40/P67-V60 green
FW 5X60/P67-V60 green
FW 5X68/P67-V60 green
FW 5X80/P67-V60 green

882020882021882022882023882024882025881150880640880641880642880646880647882127880648

5
5
5
5
5
5
5
5
5
5
5
5
5
5

40
60
80
40
60
80
33
40
60
80
40
60
68
80

52
52
52
52
52
52
52
52
52
52
52
52
52
52

67
67
67
67
67
67
67
67
67
67
67
67
67
67

60
60
60
60
60
60
60
60
60
60
60
60
60
60

100
150
200
100
150
200
80
100
150
200
100
150
175
200

–10/+70–10/+70–10/+70–10/+70–10/+70–10/+70–10/+70–10/+70–10/+70–10/+70–10/+70–10/+70–10/+70–10/+70

Urethane
FW 2X30/P30-U87 green FDA
FW 2X40/P30-U87 green FDA
FW 2X30/P45-U87 green FDA
FW 2X40/P45-U87 green FDA
FW 2X60/P45-U87 green FDA
FW 2X30/P30-U87-HACCP white FDA
FW 2X40/P30-U87-HACCP white FDA
FW 2X30/P45-U87-HACCP white FDA
FW 2X40/P45-U87-HACCP white FDA
FW 2X60/P45-U87-HACCP white FDA

882035882036881246881247881248882037882038881243881244881245

2
2
2
2
2
2
2
2
2
2

30
40
30
40
60
30
40
30
40
60

36
36
36
36
36
36
36
36
36
36

30
30
45
45
45
30
30
45
45
45

87
87
87
87
87
87
87
87
87
87

50
80
80
100
150
50
80
80
100
150

–30/+80–30/+80–30/+80–30/+80–30/+80–30/+80–30/+80–30/+80–30/+80–30/+80

Polyester
FW 2X40/P45-E92 transparent FDA
FW 2X60/P45-E92 transparent FDA
FW 2X80/P67-E92 transparent FDA

881213881214881155

2
2
2

40
60
80

36
36
46

45
45
67

92
92
92

100
150
200

–10/+100–10/+100–10/+100

Fabric reinforced

Article number

Sidewall product range

●
●
●
●
●
●

Type key

FWG 5 x 40 / P67 - V60 green
Color
Hardness [Shore A]
Material
Pitch p [mm]Height h [mm]Thickness t [mm]Fabric reinforced
Flat profile sidewall

8* When establishing the drum diameter, the dmin of the belt, the lateral profile and the sidewall
must be taken into account. The highest value is vital and must be adhered to. The dmin figures
are guidelines. They were determined at normal ambient conditions (20°C/50 % humidity.) Lower
temperatures require smaller diameters.



p





h



t

w

Finished belt sizes available
Length: 2600 to 60000 mm, Width: 200 to 1300 mm
Recommended splicing method
Stepped overlap or stepped Z-splice
Inner distance between sidewalls
a1 = 100 to 1200 mm(for a1 < 150 mm deviations in edge parallelism are possible)
Maximum profile length PL max
PL max = a1 – 2x (at x = 2+3–0 )Sidewall amplitude tolerances± 1.0 mm
Manual splice tolerances
amplitude ± 3.0 mm; spacing distance ± 1.5 mm

9

5 mm

TONGUE-MOUNTED AND
FLEX-ACTION CLEATS
Tongue-mounted cleats

Flex-action cleats

With tongue-mounted and flex-action
cleats it is possible to convey unit
goods on inclines without problems –even at steeper incline angles.
A tongue is punched into the beltmaterial in tongue-mounted cleats anda slit on flex-action cleats, on which a
profile is applied laterally.
On the conveying side, the tongue or­f lexible section lies, like the belt itself,flat on the slider bed and makes formfit conveying of unit goods on inclines
possible. (Rollers with flex-action cleats
can be used in some cases).
On the return side, the profile on the­relatively narrow longitudinal strip flexes inwards when the belt runs oversnub or support rollers. As a result,belts with tongue-mounted and flexaction cleats can be retrofitted inexisting conveyors without designmodifications.

10

ProfileTonguelength (x)[mm]Tonguewidth (y)[mm]ProfileLength offlexible section (x) [mm]Width offlexible section (y) [mm]

K 10
K 13
K 15
K 17

45 – 50
45 – 50
50 – 55
50 – 55

50 or 70
50 or 70
50 or 70
50 or 70

K 10
K 13
K 15
K 17

250
250
250 or 400
250 or 400

50 or 70
50 or 70
50 or 70
50 or 70

For other designs please inquire.

For other designs please inquire.

Tongue-mounted cleats only carry unit
goods upwards. The slider bed should
be located as close as possible to thesnub rollers to prevent the profiles
from sagging on the conveying side.

Flex-action cleats are suitable forinclined and declined conveying.
Belts with flex-action cleats are preferred for upwards conveying where
the slider beds are too short, have gaps
or are installed at a higher level than
the snub rollers.

MODIFYING BELTS
Perforations
In Siegling Transilon material almost
any perfora­tion configuration can beachieved within narrow tolerances(± 1 mm regarding the center distanceof the perforation) – please inquire
about the perforation configu­ration
you require. Special designs with metal
eyelets are also available.
Please note that the width of the beltmaterial might shrink due to pretensioning (about 30% of the elongation

Applying free forms





11

12





















Modifying belts
with lasers

You can find more information in ourReal added value due to innovative
laser technology brochure (ref. no. 123– down­load at www.forbo.com/
movement > Download).

An overlap or stepped Z-splice should
be used for perforated belts, because
perforations can also be applied tothese sorts of splices.

Maximum belt width b0 [mm] = approx. 3000 (for several perforations)
Diameters of perforations d [mm]:
4
5
6
7
8
9
10
11
13
14
16
18
19
20
30
Tolerance ± 1 mm

By precisely milling the surface of thebelt and cutting virtually any types of
perforations, Forbo Siegling offers a
range of new options for many production processes. We can supply
more detailed information on request.

Positioning and control markings,
logos, graphics, technical informationand much more can be lasered into
the surface of the belt. No material isadded, a different color is merely
applied to the surface of the belt.
Because of its extreme durability, precise positioning and crisp printing
results, this process opens up new
ways of using belts.

at fitting lengthways – see brochureno. 256).
Perforated belts are not suitable forform-fit transmission of force.
Ask your Forbo Siegling contact personfor ­alternatives.







Rows of perforations
with identical diameters

Off-set rows of perforations
with identical diameters

Distance from edge [mm]a3 min = d/2 + 25

Distance from edge [mm]a3 min = d/2 + 25

Distance between perforations,longitudinal [mm]a5 min = d + 35

Distance between perforations,longitudinal [mm]a6 min = d + 25
a7 min = d + 25

Distance between perforations, lateral [mm]a4 min = d + 35

Distance between perforations, lateral [mm]a4 min = d + 35

Tolerances for elevator belts
Center distance ofperforation [mm]Tolerance [mm]Screw size

Perforation [mm]40 – 50±1

M 6/M 7
M 8/M 9+1

63 – 125±2

M 10/M 12
M 13/M 14+2

TOP FACE PATTERNS

Siegling Transilon patterned belts guarantee good grip or good release properties, depend­ing on the design and goods conveyed.
Conveying angles of up to 30° can be achieved without profiles with certain
patterned belts.
So patterned belts are not just an affordably-priced alternative to profile belts.
The com­bination of patterned belts with longitudinal or lateral profiles is often
possible.
Patterns can be peeled off from the belt edge up to a width of 150 mm (e.g. forclamps in swan-neck conveyors – see fig. on left).

●

●

●

●

●

●

●

●

AR
Rough-top (Scale 1 : 1)

GSTR
Coarse texture (Scale 1 : 1)

STR
Normal texture (Scale 1 : 1)

●

●

●

LG
Longitudinal groove (Scale 1: 1)●
RF
Fine rhomboid (Scale 1: 1)

12

●

●

FDA design available

Inclined conveying●

Low-noise incounter bending

Wear resistantEasy to clean

Good draining
properties (wet areas)

Properties

Splice

FDA design available

Inclined conveying

Low-noise incounter bending

Wear resistantEasy to clean

Good draining
properties (wet areas)

Properties

The splice types specified in Technical
Information 1 (ref. no. 317) can be used,
depending on the belt type.

● = applicable● = applicable to a limited extent
RFF
Flat fine rhomboid (Scale 1: 1)

●

●

●

NP
Inverted pyramid (Scale 1 : 1)

●

●

●

●

●

SG
Lattice (Scale 1 : 1)

●

●

●

●

BT
Broken twill (Scale 1 : 1)

●

●

●

●

KN
Cross-stud (Scale 1: 1)

●

●

●

●

R80
Check-In, rhomboid (Scale 1: 4)

●

●

CH
Check-In (Scale 1 : 4)

●

●

●

FG
Herringbone (Scale 1 : 2)

●

13

●

●

●

●

BELT EDGE SEALING

Belt edge sealing prevents oil, grease, water, foreign bodies and bacteria from
penetrating the belt. At the same time, it increases the service life of theconveyor belt.
This additional protection can be applied to virtually every Siegling Transilon
conveyor belt. You can find detailed information on the combinations possible inour data sheets.
All common types of splice can be used on Siegling Transilon belts with beltedge sealing.

Smartseal

ProsealA special press heats the edges of the belt material. The
melted section at the sides is reshaped, seals the fabricreliably and can even be repaired. In this process, the beltedge is always the same color as the belt itself. The colors
intermingle if the color of the layers is different

A round cord is welded onto the edge of the belt.
This type of belt edge sealing is used on narrow belts
and belts with special colors.

Combinations of materials
Process

Top face coating

Belt thickness from/to [mm]Smartseal

A; E; U; V; 0
0; U0
A
E
U; UxS
V; VxS

0.7 – 4.5
0.7 – 2.7
2.5 – 3.7
1.7 – 2.2
0.7 – 2.7
1.2 – 4.5

Prosealtransparent
●*

white

green

blue

Belt widths from/to [mm]

●*
●

●*
❍

●*
●

●
●

❍
●

●
●

30/150*** – 4000
40 – 1000**
40 – 1000**
40 – 1000**
40 – 1000**
40 – 1000**●●* For technical reasons, same as color of belt, ** larger widths on request, *** Depending on the material● available❍ on request

We do not claim that all the information is complete and correct and it may differ for some types. Please get in touch with your Forbo Siegling contact.

14

KNIFE EDGE BELTS

Siegling Transilon knife edge belts areespecially flexible longitudinally andrigid laterally. They are suitable for use
on knife edges as of 3 mm radius.

hEven wide belts run flat, so even light­
weight goods remain in position.
With their high coefficients of thermal
conductivity, knife edge belts are
exceptionally well suited for use ascooling tunnel belts. They are foodsafe, largely impervious to oils andgreases and meet BfR, EU and FDA
stipulations when conveying unpackaged foodstuffs. They can also be supplied in blue and white HACCP design.
Since the power consumption of knifeedge belts is higher, the arc of contact
should be kept as small as possible.
Long conveyor belts running over knife
edges (e.g. cooling tunnels) usually
have edge-mounted tracking devices.

Shorter knife edge belts (e. g. at transfer points and tray belts) can betracked well if a crown (h) is added to
the knife edge or in reverse operation
to both knife edges.

Z-splice
Due to its high flexibility and durability,
we recommend the hot-pressed
Z-splice for knife edge belts. The standard splice is 90°. A 60° or 80° splice isalso possible for this type ­(particularlysmooth operation).
By using special splice films, almost
identi­cal friction coefficients areachieved on the underside of the splice.
This makes belt travel smoother andrunning times longer.

Further information about finishing, types available, standard sizes and tolerances
can be found in Technical Information 1 (ref. no. 317).
Further information on fitting knife edge machinery can be found in
Recommendations for conveyor design, ref. no. 305.
15

CURVED BELTS








Thanks to their fabric design, Siegling
Transilon curved belts are exceptio­n­ally
flexible, both laterally and longi­
tudinally, ensuring an optimal distribution of forces within the belt.

α






Depending on the application, either
conical or cylindrical drums are used, orin some cases even knife edges or rolling knife edges.

αCurved belts can be fabricated fromone or more segments. Fabricationfrom several segments improves the
distribution of forces within the belt.
Curved belts can be equipped withperforations or eyelets along the edges
so they can be attached to track­ing systems later on.

Standard curved belt dimensions
[mm]
rmin
= 250 mmbmax = 4500 mm
Special dimensions on request

16

Z-splice
1-ply types are made endless with aZ-splice.
Stepped Z-splice
For 2-ply curved belts we recommend
the stepped Z-splice. It has the same
flexibility properties as the Z-splice, but
can better absorb the lateral forces thatarise in the curved belt.

Diagonal wedge or overlap splice
These two splice types can be used as
an alternative if a stepped Z-splice cannot be fabricated. Both splice types
enable the belt splice to roll over the
drum evenly and can also absorb the­lateral forces that arise.

SPECIAL BELT PROPERTIES
Antistatic belts

NA (Non-antistatic)

HC (Highly-conductive)

In the case of multi-layer types,
Siegling Transilon belts with an antistatic finish usually have an electricallyconductive antistatic agent, which isembedded in the belt to prevent itfrom wearing off.

Siegling Transilon NA belts are­produced without an electrically conductive anti-static element. Tested
according to ISO 21178 the electricalsurface resistance RDi is more than
3 x 108 Ω.

Siegling Transilon HC belts (Highly
Conductive) have a special, antistatic
finish, usually in the form of a conductive top face and underside. Measured
in line with ISO 21178, the electrical surface resistivity of the top face andunderside is ROA < 3 x 108 Ω.

It effectively prevents static build-up
from the running belt. Antistatic belts
do not always guarantee discharge ofpreviously statically-charged conveyed
goods, e.g. in the nonwovens industry,when conveying plastic or electronic
components. In these cases HC belts
should be used, particularly when they
have to be ESD safe.

Combined with the coating materials
appropriate in each case, NA belts
guarantee smooth operation whenusing in electro-magnetic fields suchas machine components with high frequency, X-ray and microwave applications.

Based on the DIN-EN-ISO 284 threshholds, the resistance (RDi) measured incompliance with ISO 21178 lengthways
is parallel to the surface of the belt RDi< 3 x 108 Ω.
SpliceThe splice types listed in Technical
Information 1 (ref. no. 317) can –depending on type – be used for antistatic Siegling Transilon belts.

NA belts in many different coatings
with specific properties for particular
products provide a high safety standard, in particular because of stringent
quality controls, in the food and tobacco, chemical, pharmaceutical and particle board industries. As a result, sensitive metal detectors perform very wellwith Siegling Transilon NA belts.
SpliceThe splice types specified in Technical
Information 1 (ref. no. 317) can be used
for Siegling Transilon NA belts,
depending on the belt type. It is notpossible to use mechanical fasten­ers
made of steel if metal detectors are inuse or in microwave applications.

In the majority of belt types, the surface resistivity ROA of the top face andunderside is even less than 1 x 107 Ω
and as a result falls significantly short of
the threshold stated in DIN-EN ISO 284.
Numerous belt types (HC+) also havean electrical volume resistance RD < 1 x
109 Ω., verified in accordance withISO 21178.
HC belts are particularly suitable forconveying electronic components andanywhere where, if the belts and thegoods conveyed are charged, there is a
detrimental effect on product quality
e.g. in the nonwoven or chemicalindustries.
If the belts have to be ESD safe, only
HC belts can be used. Should the belts
be required for ESD applications, werecommend consulting applicationengineers at Forbo Siegling to discuss
the technical details.
SpliceThe splice types specified in Technical
Information 1 (ref. no. 317) can be used
for Siegling Transilon HC belts, depending on the belt type.

17

SPECIAL BELT PROPERTIES
Accumulation belts

Accumulation belts are used whencollec­ting conveyed goods behind abarrier or when sliding onto or off abelt. The particularly stiff design of thebelts ensures level conveying in larger
belt widths. Therefore, pushing unit
goods on or off from the side is no
problem at all.
Minimum friction coefficients between
slider bed and underside and accumulation goods and top face must be
maintained so that required power andwear and tear is kept low.
Siegling Transilon accumulation belts
with duro­plastic urethane coating (UHor U2H) are particularly abrasion resistant and have low friction coefficients.
These properties guarantee long durability and reduce maintenance costs.

SE/FR (flame retardant)

SpliceThe splice types specified in Technical
Information 1 (ref. no. 317) can be used
for Siegling Transilon accumulation
belts, depen­ding on the belt type, buta Z or stepped Z-splice is ­preferred.
When using overlap and wedge splices
please note: Because of the unusual
load on the top face in accumulation,the ­splice lap must decline from the
top face (see fig. at the top).

Tunnels connecting terminals or stories
are a potential fire risk.
Flame retardant Siegling Transilon belts(SE/FR) prevent the fire from spreading.
In keeping with EN 20340/ISO 340 (SE)and MSHA Std 2G (30CFR18.65) measured according to ASTM D-378 (FR)these belts extinguish after being sub­jected to an open flame and do not reignite should they come into contact
with a stream of air.
SE and FR belts ensure extra safety inbaggage and freight handling in distri­bu­tion centers and at airports.
SpliceThe splice types specified in Technical
Information 1 (ref. no. 317) can be used
for Siegling Transilon SE belts.

To eliminate belt mistracking that might
be caused by loading or unloading ofgoods from the sides, we recommend:– lagging all support rollers in the loading area so as to increase the dragbetween them and the belt whichcounter­balances the lateral forces– designing the conveyor for increased
belt wrap around the drums/rollers in
the loading area (also advisable in thecase of eject mechanisms).

18

Flame-retardant belts cease to burn within
seconds as soon as they are no longer subjected
to an open flame.

ATEX-compliant processing belts
The suitability of processing belts is­out­lined in ATEX manufacturer andcompli­ance declarations, issued in conjunction with an officially nominatedbody (TÜV – German Technical Super­visory Body).
Detailed operating instructions, withinformation on how to use the conveyor in compliance with ATEX, are part ofthe compliance declarations.
The 94/9 EC directive, known in theindustry as the ATEX 95 directive, on
preventing ignition risks in explosive
atmospheres, came into force on July 1,
2003. It has since been replaced by the
updated ATEX 2014/34/EU directive.
When used in conveyors, processing
belts are also at risk of ignition fromstatic elec­tricity or friction heat, if they
are not used properly. Two partners are
responsible for seeing this is done: thebelt supplier and conveyor manufacturer.
As a belt supplier, Forbo Siegling faces
up to this responsibility and if required,
will supply processing belts that may
be used in an explosive atmosphere.

19

Ask your Siegling contact person
about the types currently available
because we’re constantly adding to
our ATEX product range. And we provide advice tailored to our customers’
needs and current and future ATEX
issues too.
While the current ATEX directive
2014/34/EU deals with operation of
new machinery, ATEX directive 137(workplace directive 1999/92/EC) cameinto force in July 2006. As part of theregulation on safety in the workplace,it governs the operation of machinerythat could cause explosive atmospheres.
Therefore, when old machinery is operated, processing belts will have to besupplied and used in compliance withthe later ATEX directive.

Siegling – total belting solutions
Committed staff, quality oriented organization and­production processes ensure the constantly high standardsof our products and services.

Our service – anytime, anywhere
Forbo Movement Systems employs around 2,500 people in its
group of companies. Our products are manufactured
in ten production facilities across the world.
You can find companies and agencies with warehouses andworkshops in over 80 countries.
Service points are located in more than 300 places worldwide.

Forbo Siegling GmbH
Lilienthalstrasse 6/8, D-30179 HannoverPhone +49 511 6704 0
www.forbo-siegling.com, siegling@forbo.com

06/23 · UDH · Reproduction of text or parts thereof only with our approval. Subject to change.

Ref. no. 318-2

Forbo Movement Systems complies with total quality management principles. Our quality management system has
ISO 9001 certification at all production and fabrication sites.
What’s more, many sites have ISO 14001 environmental
management certifi­cation.