RUBBERCONVEYOR BELTS

2

Structure of conveyor beltsWear resistant rubber conveyor belts

Program 3 EP fabric Type A DIN 22102 type XType B DIN 22102 type YType C JIS / KS SType D JIS / KS GType E JIS / KS L

Program 3A NN fabric Type A DIN 22102 type XType B DIN 22102 type YType C JIS / KS SType D JIS / KS GType E JIS / KS L

Heat resistant rubber conveyor belts

Program 4 EP fabric Type K

Oil & heat resistant rubber conveyor belts

Program 7 EP fabric Type GW Wear, Oil, Heat, AntistaticType GWF ISO R 433 Wear, Oil, Heat, Antistatic, Flame

Oil resistant rubber conveyor belts

Program 7A EP fabric Type GWM Moderate oil, AntistaticType GWS Oil amines and terpenes, Antistatic

Conveyor belts for inclined transport-Rib belts (Chevoron belts)

Program 11 EP fabricProgram 11A NN fabric

TS(N/mm2) Elong(%) Loss(mm3) Temp(。C) Roll(m) Width(mm) PAGE

252018148

252018148

450400450400300

450400450400300

110120200250400

110120200250400

110~140

200200200200200

200200200200200

200

14001400140014001400

14001400140014001400

1400

55555

66666

7

100125

200200

14001400

88

8080

200200

14001400

99

100100

800800

1010

3

CONVEYOR BELT CONSTRUCTIONS

CARCASSThe function of the carcass is to transmit and absorb theforces acting on the belt. It is primarily a question of tensileforces from the driving pulley. Secondly the carcass absorbsthe impact that partly appears when the material is loadedonto the conveyor, and partly when the belt with materialpasses over the carrying idlerws.The carcass consists of one or more plies of textile fabric withrubber on each side to give adhesion and flexibility. Thelongitudinal direction is called warp and the cross direction iscalled weft, see fig. 1 and 2.The conveyor belt fabrics can have the same or differentmaterial in warp and weft. One letter is designating each, forinstance EP, in which E is Polyester in warp and P isPolyamide in weft.In the following the most common carcass materials aredescribed.

Nylon Fabric (NN)Nylon fabric is the principal material of the carcass, whichnearly has all necessary propertles as the tension member ofconveyor belt.- High tensile Strength- High Impact Resistance- High Bending Resistance- Wide Selection Available- Little Flexuous Fatigue- Light Weight- High Adhesion Strength- Excellent Resistance to Water

Polyester‐Polyamide (EP)The EP fabrics have Polyester as the warp and Polyamide asthe weft. This combination gives the best possible fabriccharacteristics with the following advantages:- high strength in proportion to weight- high resistance to impact- negligible elongation- great flexibility, excellent troughability- not susceptible to humidity and micro-organismsThese technical advantages as well as many years’experience in the conveyor belt field is the reason whyROULUNDS prefer EP as carcass material in conveyou belts.

COVERSThe covers protect the carcass and give the necessary frictionbetween belt and driving pulley and between belt andmaterial.As the covers must resist influences from the transportedmaterial and the weather, cover types that are wear and liveresistant, oil and/or heat resistant, antistatic or that combinetwo or more of these properties are required.

BELT CONSTRUCTIONSBelt construction means the combination of carcass andcovers. The combination determines whether the beltconstruction is harmonious and works without problems.In the harmonious belt construction the transmission of thenecessary power, material type, lump size, height of fall,weight etc. are taken into consideration. Furthermore thecarcass must give the belt stability, so that it is easy to guideon the conveyor.Increased carcass strength is normally followed by increasedthickness and quality of the covers to ensure a balanced lifebetween carcass and covers.

A conveyor belt is constructed of two components carcass and covers.

4

CONVEYOR BELT CONSTRUCTIONS

Multiply beltshave three or more fabric plies in the carcass. The necessarystrength and stability is secured by using sufficient number offabric plies in the carcass.To reach a harmonious combination of belt width, number ofplies in carcass, and cover thickness, the following generallines can be used:

Number of pliesin Carcass

3 ~ 44 ~ 6

Belt Width(mm)

~ 800800 ~ 1400

Cover Thickness(mm)

recommended minimum

2+13+1

5+1.56+28+3

Tensile Strength of CarcassNewton per mmbelt width(N/mm)

~ 200250 ~ 400400 ~ 630630 ~ 10001000 ~

It should be stressed that these lines are only general, andvariations can easily be found depending on material, beltspeed, loading conditions etc.

5

WEAR RESISTANT RUBBER CONVEYOR BELTS PROGRAMME 3

COVERTYPE

COVER COMBINATION

(mm)

MAX.WORKINGTENSION(N/mm)

CARCASS CONSTRUCTION

B, C, D, EB, C, D, EB, C, D, EB, C, D, EB, C, D, E

A, B, C, D, EA, B, C, D, EA, B, C, D, EA, B, C, D, EA, B, C, D, EA, B, C, D, EA, B, C, D, E

2+1, 3+1 2+1, 3+1, 4+23+1, 4+23+1, 4+23+1, 4+2, 5+1.54+2, 5+1.5, 6+2

5+1.5, 6+2, 8+26+2, 8+2, 10+36+2, 8+2, 10+36+2, 8+2, 10+36+2, 8+2, 10+36+2, 8+2, 10+3

2025

31.540506380100125160200250

EP 200/2EP 250/2

EP 315/3EP 400/3EP 500/3EP 630/3

EP 400/4EP 500/4EP 630/4EP 800/4EP 1000/4

EP 630/5EP 800/5EP 1000/5EP 1250/5EP 1600/5EP 2000/5

EP 1250/6EP 1600/6EP 2000/6EP 2500/6

2 plies 3 plies 4 plies 5 plies 6 plies

APPLICATIONFor transportation of all kinds of abrasive materials. Choice between 6 cover qualities depending on transport and runningconditions. There are thus good possibilities of solving individual transport problems. This programme also covers belts without cover for transportation of for instance cardboard boxes, letters, mail bags, parcels.

CONSTRUCTION AND PROPERTIES Belts with covered edges based upon carcass of synthetic EP fabric (polyester/polyamide). The EP carcass provides �Small elongation at highest working tension �High impact resistance �Not susceptible to humidity and microorganisms.

COVER TYPE AVery wear resistant cover, suitable for transport of materials with sharp edges.Fulfils DIN 22102 type X.

COVER TYPE BWear resistant cover for transport of abrasive materials. Type B has a large general field of application.Fulfils DIN 22102 type Y.

COVER TYPE C, D, EWear resistant cover for transport of material.Fulfils JIS/KS type S, G, L.

TECHNICAL DATAMax. material temperature

at lump size < 40 mm : 80�Cat lump size > 40 mm : 100�C

Ambient temperature max. 50�C, min. -30�C.Belts with cover are antistatic according to ISO 284.For pulley diameters, belt weight and belt thickness as well astroughability we refer to the belt selection basis (pdf-file).

AVAILABILITYCover combinations and cover qualities according to specification. Open or endless lengths.Max. length unit 200 m/roll or according to agreement, however, allowance must be made for practical handling possibilities (weightand roll diameter).Max. carcass strength 3150 N/mm.Max. belt width 1400 mm.

Cover A

Min. elongation (%)Min. tensile

strength (N/mm2)Max.wear

loss (mm3)450

450

25

110

B

400

20

120

C

450

18

200

D

400

14

250

E

300

8

400

6

WEAR RESISTANT RUBBER CONVEYOR BELTS PROGRAMME 3A

COVERTYPE

COVER COMBINATION

(mm)

MAX.WORKINGTENSION(N/mm)

CARCASS CONSTRUCTION

B, C, D, EB, C, D, EB, C, D, EB, C, D, EB, C, D, E

A, B, C, D, EA, B, C, D, EA, B, C, D, EA, B, C, D, EA, B, C, D, EA, B, C, D, EA, B, C, D, E

2+1, 3+1 2+1, 3+1, 4+23+1, 4+23+1, 4+23+1, 4+2, 5+1.54+2, 5+1.5, 6+2

5+1.5, 6+2, 8+26+2, 8+2, 10+36+2, 8+2, 10+36+2, 8+2, 10+36+2, 8+2, 10+36+2, 8+2, 10+3

2025

31.540506380100125160200250

NN 200/2NN 250/2

NN 315/3NN 400/3NN 500/3NN 630/3

NN 400/4NN 500/4NN 630/4NN 800/4NN 1000/4

NN 630/5NN 800/5NN 1000/5NN 1250/5NN 1600/5NN 2000/5

NN 1250/6NN 1600/6NN 2000/6NN 2500/6

2 plies 3 plies 4 plies 5 plies 6 plies

APPLICATIONFor transportation of all kinds of abrasive materials. Choice between 6 cover qualities depending on transport and runningconditions. There are thus good possibilities of solving individual transport problems. This programme also covers belts without cover for transportation of for instance cardboard boxes, letters, mail bags, parcels.

CONSTRUCTION AND PROPERTIES Belts with covered edges based upon carcass of synthetic EP fabric (polyester/polyamide). The EP carcass provides �Small elongation at highest working tension �High impact resistance �Not susceptible to humidity and microorganisms.

COVER TYPE AVery wear resistant cover, suitable for transport of materials with sharp edges.Fulfils DIN 22102 type X.

COVER TYPE BWear resistant cover for transport of abrasive materials. Type B has a large general field of application.Fulfils DIN 22102 type Y.

COVER TYPE C, D, EWear resistant cover for transport of material.Fulfils JIS/KS type S, G, L.

TECHNICAL DATAMax. material temperature

at lump size < 40 mm : 80�Cat lump size > 40 mm : 100�C

Ambient temperature max. 50�C, min. -30�C.Belts with cover are antistatic according to ISO 284.For pulley diameters, belt weight and belt thickness as well astroughability we refer to the belt selection basis (pdf-file).

AVAILABILITYCover combinations and cover qualities according to specification. Open or endless lengths.Max. length unit 200 m/roll or according to agreement, however, allowance must be made for practical handling possibilities (weightand roll diameter).Max. carcass strength 3150 N/mm.Max. belt width 1400 mm.

Cover A

Min. elongation (%)Min. tensile

strength (N/mm2)Max.wear

loss (mm3)

450

25

110

B

400

20

120

C

450

18

200

D

400

14

250

E

300

8

400

7

HEAT RESISTANT RUBBER CONVEYOR BELTS PROGRAMME 4

BELTTYPE COVER

MAX. WORKING TENSION(N/mm)

Vulcanizedjoining

Mechanicaljoining

CARCASS CONSTRUCTION

KKKKKKKK

See tablebelow

2025

31.540506380100

162025

31.540506380

EP 200/2EP 250/2

EP 315/3EP 400/3EP 500/3EP 630/3EP 800/3

EP 400/4EP 500/4EP 630/4EP 800/4EP 1000/4

EP 500/5EP 630/5EP 800/5EP 1000/5

2 plies 3 plies 4 plies 5 plies

APPLICATIONFor transportation of hot abrasive materials such as blast furnace clinker, coke, foundry sand, ore, slag etc. with max. materialtemperature of 140�C. Materials with higher initial temperature can under certain conditions be transported if sprinkled with water at loading.

CONSTRUCTION AND PROPERTIES Belts with covered edges based upon carcass of synthetic EP fabric (polyester/polyamide). The EP carcass provides �Small elongation at highest working tension �High impact resistance �Not susceptible to humidity and microorganisms.

COVERSThe belt types K is covering different temperature areas, see technical data.Both types have good wear resistant properties.

TECHNICAL DATA The cover thickness is graduated according to lump size and temperature of material as follows:

TYPE LUMPSIZE

COVER THICKNESS(mm)

3+1 4+1.5 5+1.5 6+1.5

K< 40 mm

> 40 mm

110。C

120。C

120。C

130。C

130。C

140。C

130。C

140。C

The above table is based on 50�C ambient temperature. Ambient temperature max. 50�C, min. -30�C. Antistatic according to ISO 284. For pulley diameters, belt weight and belt thickness as well as troughability we refer to the belt selection basis.

AVAILABILITY Cover combinations and cover qualities according to requirement and request.Open or endless lengths.Max. length unit 200 m/roll or according to agreement, however, allowance must be made for practical handling possibilities (weightand roll diameter).Max. carcass strength 1600 N/mm.Max. belt width 1400 mm.

8

OIL & HEAT RESISTANT RUBBER CONVEYOR BELTS PROGRAMME 7

APPLICATION The two belt types are used for transportation of oily and comparatively hot materials such as clinkers, copra, fertilizers with Lila-min, fodder mixtures, meat and bone meal, refuse, slag etc. Type GWF is particularly suitable for applications, which for safety reasons require a flameproof conveyor belt.This programme is a supplement to the standardized stockprogramme RO-PLY GWF. It includes the belt types that fulfil specialrequirements on strength, cover combinations and belt widths, which are not fulfilled by the RO-PLY GWF standard programme.

CONSTRUCTION AND PROPERTIES The types GW and GWF are with carcass of synthetic EP fabric (polyester/polyamide) providing.�Small elongation at highest working tension �High impact resistance �Not susceptible to humidity and microorganisms The types GW and GWF have a good wear resistance, are oil and heat resistant and antistatic.Apart from that type GWF is flameproof according to ISO R 433, basic quality K.

TECHNICAL DATA Max. material temperature GW: 100�C.Max. material temperature GWF: 125�C.

Type GWF is flameproof according to ISO R 433, basic quality K, testing according to ISO R 340.Antistatic according to ISO 284.For pulley diameters, belt weight and belt thickness as wellas troughability we refer to the belt selection basis.

AVAILABILITY Cover combinations according to requirement and request (however, for type GW min. 4 mm totally).Open or endless lengths.Max. length unit 200 m/roll or according to agreement, however, allowance must be made for practical handling possibilities (weightand roll diameter).Max. carcass strength 1600 N/mm for GW.Max. carcass strength 1000 N/mm for GWF.Max. belt width1400 mm.

BELTTYPE

COVER COMBINATION

(mm)

MAX. WORKING TENSION (N/mm) CARCASS CONSTRUCTION

GW, GWFGW, GWFGW, GWFGW, GWFGW, GWFGW, GWFGW, GWF

3+13+1, 4+23+1, 4+23+1, 4+2, 5+1.53+1, 4+2, 5+1.54+2, 5+1.54+2, 5+1.5

20.025.031.540.050.063.080.0

16.020.025.031.540.050.063.0

EP 200/2EP 250/2

EP 315/3EP 400/3EP 500/3

EP 400/4EP 500/4EP 630/4EP 800/4

EP 630/5EP 800/5

2 plies 3 plies 4 plies 5 pliesVulcanized

joiningMechanical

joining

9

BELTTYPE

COVER COMBINATION

(mm)

MAX. WORKING TENSION (N/mm) CARCASS CONSTRUCTION

GWM, GWSGWM, GWSGWM, GWSGWM, GWSGWM, GWSGWM, GWSGWM, GWS

3+13+1, 4+23+1, 4+23+1, 4+2, 5+1.53+1, 4+2, 5+1.54+2, 5+1.54+2, 5+1.5

20.025.031.540.050.063.080.0

16.020.025.031.540.050.063.0

EP 200/2EP 250/2

EP 315/3EP 400/3EP 500/3

EP 400/4EP 500/4EP 630/4EP 800/4

EP 630/5EP 800/5

2 plies 3 plies 4 plies 5 pliesVulcanized

joiningMechanical

joining

OIL RESISTANT RUBBER CONVEYOR BELTS PROGRAMME 7A

APPLICATION The two belt types are supplement to type GW and GWF and suitable for handling materials with moderate fat and oil contents,such as grain, fodder mixtures, refuse, wooden chips, fertilizer, etc. Type GWM is used for the transportation of material containing moderate amounts of oil, whereas type GWS is resistant to oilamines and terpenes as well.

CONSTRUCTION AND PROPERTIES Type GWM and GWS are multiply constructgions with cut edges. The carcass is made of synthetic EP fabrics(polyester/polyamide)providing �Small elongation at highest working tension �Not susceptible to humidity and microorganisms Type GWM is medium and type GWS medium to maximum oil resistant. Both types are antistatic.

TECHNICAL DATA Material temperature max. +80�CAmbient temperature max. +50�C, min. -30�C.Antistatic according to ISO 284.For drum diameters, belt weight, belt thickness and troughability, see belt selection basis.

AVAILABILITY Cover combinations according to requirement.Open or endless lengths.Max. production unit 200 m/roll or according to agreement, however, allowance must be made for practical handling possibilities(weight and roll diameter).Max. carcass strength 1000 N/mm.Max. belt width 1400 mm.

10

CONVEYOR BELTS FOR INCLINED TRANSPORT-RIB BELTS (CHEVORON BELTS) PROGRAMME 11, 11A

APPLICATION Rubber conveyor belts without ribs are used for inclined transportation of bulk goods up to approx. 22。dependent on the frictionangle between material and belt. If rib belts or belts with pattern are used the angle of inclination can be increased considerably, as in that case the max. angle ofinclination depends on the internal friction of the material both in static and dynamic conditions. Guidance is given in table 17. Ribbelts are ued for bulk goods with unit size of 0-150 mm and for transportation of sacks. Belt and rib qualities are chosen on thebasis of the individual belt programmes 1-8 + 12, whereas rib dimensions are shown in the table above.

TECHNICAL DATA V-ribs are hot-vulcanized and have been developed to secure a steady running on flat return idlers.Width of rib Bm depends on shape of the hopper and placing of the skirting. Height and width of ribs (h x b) depend on lump size,capacity, and desired robustness. Recommended capacities can be seen from the above data. In order to secure the best capacityat a given angle of inclination it is important that the material is at rest on the belt. This is achieved by feeding uniformly in thetravelling direction at a speed equal to that of the belt. Further we recommend to reduce the carrying idler distance compared tonormal conveyors. The belt speed should not exceed 2 m/s and should be kept as low as possible.

PROGRAMME FABRIC BELT WIDTH(B) (mm) RID PATTEN DIMENSIONS RIB DIMENSIONS

11

11A

EP fabric

NN fabric

300~800

DISTANCE(a) : mm HEIGHT(h) : mmTHICKNESS(b) : mm

11

CONVEYOR BELTS, ASSORTMENT

ROULUNDS multiply conveyor belts are supplied withcovers and carcass strength adapted to the individualrequirements.ROULUNDS conveyor belts are also supplied with ribs orpatterned surface for inclined transport.

Calculation Method of Belt Length

L=(d+(D-d)π× N2

L:Belt Length(m)d:Dia. of Core(m)D:Dia. of Rolled Belt(m)N:No. of Times Rolled

The table indicates ROULUNDS multiply conveyor beltprogramme.In the system key and in each single programmemore detailed information is given.

APPLICATION BELT PROGRAMME

Abra

sive

mat

eria

lsH

ot,

abra

sive

mat

eria

ls

Hot

mat

eria

lsco

ntai

ning

oil

Mod

erat

eoi

lym

ater

ial

Very abrasive, sharp edges. Granite, iron, broken stone,slag, gravel, limestone, coke, ore, coal.

Moderately to very abrasive.Ashes, cement, limestone, earth, coal, coke, lignite,potatoes, clay, marl, mortar, concrete.

Abrasive, hot/wet.

Refuse, fodder mixtures, wood containing resin,clinkers, soya cakes, copra, meat-and bone meal,wooden chips, slag.Fertilizer with Lilamine.Requirement for flameproof belt.

Grain, fodder mixture, refuse,wodden chips, fertilizer.

80。C

80。C

140。C

100。C125。C

80。C

Exampled of material Max.temp.

A

B

K

GWGWFGWF

GWMGWS

Type

3150

3150

1600

16001000

1600

1400

1400

1400

14001400

1400

Carcass strengthmax. N/mm

Belt widthmax. mm

Cover

~25.0mm

25.1mm~35.0mm

35.1mm~

Dia of Core

600mm

800mm

1,000mm

ROULUNDS KOREA LIMITED

137-52, Yusan-Dong, Yangsan-City, Kyungnam, KoreaTel : +82 55 380 8090~4Fax : +82 55 380 8099http://www.roulunds.co.kr

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