wire cloth for sieving and sizing - bopp bopp sieving meshes – distinctive quality features nese...

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BOPP SIWire cloth for sieving and sizing

SWISS

PREC

ISION

BOPP SI Wire cloth for sieving and sizing

The very best sieving meshes successfully combine all the following:

• Top quality materials• Innovative design• Decades of experience and widely

acknow ledged understanding of development, production techniques and applications

• State of the art looms and equipment• Consistently high levels of quality control

BOPP products guarantee all this and much more besides. Working closely with our customers, we develop bespoke solutions tailored to meet individual requirements. Our R&D department focuses on new opportunities and possibilities, backed up by our leading edge technology. Our extensive range of standard meshes in aperture sizes from 0.020 – 16mm have been developed based on decades of experience operating in the most diverse market sectors. We process premium materials – predominantly stainless steel – using in-house designed weaving looms and equipment.

PREMIUM STAINLESS STEEL WIRE MESHES FOR THE MOST DEMANDING APPLICATIONS

n BOPP SIEVING MESHES ARE RECOGNISED WORLDWIDE AND SOUGHT AFTER FOR THEIR OUTSTANDING PROPERTIES:

• Extremely high weaving accuracy, evenness and definition

• Advanced strength and inherent rigidity• Superior levels of thermal and corrosion

resistance• Resistance to humidity and static loading

• Ease of processing, i.e. flatness, no twist• Exceptional physical characteristics in

comparison with synthetic meshes• Regular stretching properties when

tensioned• Total reproducibility in all areas

BOPP SIEVING MESHES – DISTINCTIVE QUALITY FEATURES

n THESE DISTINCTIVE CHARACTERISTICS GUARANTEE THE BEST RESULTS:

• High levels of accuracy• Improved effectiveness• Higher throughput

• Longer sieve operating life• Fewer process interruptions• Improved economy

2

BOPP SI is the name behind our comprehensive range of wire cloth developed specifically for sieving and sizing applications. We recognise

the responsibility we bear and the important role our wire cloth plays in terms of the quality of our customers’ products. We are proud to

manu facture BOPP SI wire cloth as a precision tool for sieving and sizing.

© G. BOPP + CO. AG, CH-8046 Zürich – www.bopp.com

ForceN/cm

BOPP SI

Nylon

Polyester

80

60

40

20

5 10 15 20Elongation %

n APERTURE (W), WIRE DIAMETER (D)

Square woven wire meshes are defined by aperture and wire diameter. The aperture (w) describes the distance between two warp or weft wires. The wire diameter (d) describes

the thickness of the wire before weaving. This measurement may alter slightly during the weaving process.

IMPORTANT DEFINITIONS FOR SIEVING MESHES

n MESH COUNT

The mesh count describes the number of apertures per imperial inch and is calculated as follows:

n MESH OPEN AREA (Ao)

Mesh open area’ describes the total of all apertures as a percentage of the mesh surface.

Mesh = 25.4 mm

w (mm) + d (mm)

Mesh Open Area Ao = w

x 100% w + d( )2

n MATERIALS

Our main material is stainless steel to DIN 1.4301 (AISI 304) or DIN 1.4401 (AIS 316).

Other specifications are available in chrome steel to DIN 1.4016 (AISI 430).

n MEASUREMENTS

Standard widths are 1020mm (40”), 1220mm (48”) and 1530mm (60”). Other widths up to 2750mm can be produced to order. Standard lengths are 30.5m (100 ft), with specials available on request. Materials are also available cut to size.

n ORDERING EXAMPLE

BOPP-SI Wire ClothMaterial: stainless steel DIN 1.4401W = 0.090mm, d = 0.040mm30m x 1220mm wide

n WARP/WEFT

The longitudinal direction of a mesh wire is the warp, the transverse direction is the weft. Only stainless steel wires are used, which

meet the most challenging requirements in terms of diameter tolerances, yield strength and wire surface.

e.g. w = 0,050 mm, d = 0,030 mm, Ao = 39%

3


WarpWeft

d ww dw

dww

d

A0 ~ 39% A0 ~ 47%

w=0,224 d=0,180 Mesh

w=0,1 d=0,05165 Mesh

Our wire cloth is used in a wide variety of different sieving processes. One of the most important steps is to establish the

right mesh for each application, guided by a few important basic principles. For special applications and specific requirements, our

THE RIGHT SIEVING MESH, OPTIMISED FOR EACH APPLICATION

technical experts are always available to provide informed advice.

n APERTURE SIZE

This is decided by the size of the particles to be separated. BOPP-SI meshes are availab-le as standard in aperture sizes from 16mm to 20 microns (0.020mm), to ISO 4783 standard.

Where the sieved product is subject to narrow tolerances, the production tolerances of the wire mesh should also be taken into consider ation.

n WIRE DIAMETER

The choice of wire diameter is influenced by a range of factors. The thicker the wire, the stronger and more abrasion resistant the mesh, and the longer the life expectancy of the sieve. However, thicker wires also reduce the open area and therefore the flow.

Parameters

Flow

Efficiency

Abrasion resistance

Open area

Number of apertures

Strength

Weight

Thinner wire Thicker wire

Ü

Ü

Ü

Ü

Ü

Ü

Ü

Ü

Ü

Ü

Ü

Ü

Ü

Ü

Open area

> 60 %

48 – 60 %

36 – 48 %

< 36 %

Mesh type

extra light

light

standard

heavy

Apertures

0.560 – 16

0.212 – 5

0.038 – 2

0.020 – 0.600

In many cases, the optimum specification is best identified through trials. As the open area directly or indirectly affects flow and efficiency as well as the life expectancy, these are detailed in the tables on the following pages.

For each given aperture size, a reduced wire diameter increases the number of apertures within a given surface area. This increases flow as well as efficiency in relation to the open area of the sieve. Flow increases because the particles have more room to pass through the sieve. Efficiency increases as, given the same sieving area and sieving time, more apertures are available through which particles may pass.


4


Mesh weight (kg/m2)

less than 0,4

0,4 – 0,8

more than 0,8

Exact tensioning vital

Control of tension vital

Control of tension recommended

n TENSIONING

The minimum tension values given in the tables are for guidance only. Correctly tensioned sieves will achieve good life cycles on most sieving machines. In order to fully

exploit the potential of the equipment, a quick adjustment of the tension value after each task can be valuable. Correct, evenly tensioned sieves can achieve exceptional life

cycles. The finer the mesh, the more critical the tension.

1. Take the mesh to the required tension step by step. Alternate tension increases in warp and weft directions, always beginning with warp.

2. When tensioning finer meshes, monitor tension levels constantly using a tension meter.

n EXPERIENCE HAS SHOWN THE VALUE OF THE FOLLOWING RECOMMENDATIONS:

• Trapped particles: individual particles are marginally too big to pass through the sieve and become trapped. Increasing the aperture size by 5% can realise significant improvements.

• Retained particles: fine particles cause partial or complete blinding of the mesh, often in conjunction with humidity/moisture. Correct by using a mesh with a larger area and sieving aids such as rubber balls or brushes. If using sieving aids, ensure that the additional mechanical loading is reduced as far as possible.

Trapped particles Retained particles

5


n SIEVE BLOCKAGES...

n LIFE EXPECTANCY

Life expectancy is a key issue for economical sieving and sizing. Correct tensioning and positioning of the sieve are important prere-quisites for optimum achievement. Experience

indicates that mechanically, a sieve should last for 500 to 600 working hours. If this is not the case, it is well worth examining the reasons carefully. The causes of shorter life

cycles could lie with the mesh, tensioning processes, equipment design, the machine itself or the product being sieved.

PRECISION AND QUALITY FOR PROCESS SECURITY

Particle size distribution impacts on quality and the properties of solids. A consistent grain size guarantees consistent product quality. For this reason, total control over grain size is essential.

Important note: The mesh counter only gives the number of apertures over a given distance. It is therefore essential to monitor the regularity of the apertures.

n BOPP MESH COUNTER

FABRICATION AND TENSIONING SERVICES

Professional handling of high value sieving meshes is as important as the mesh itself. For replacement parts too, our customers place their trust in our years of experience. We offer a comprehensive service, including:• Tensioning from new in all shapes and sizes

up to 2600mm• Retensioning frames delivered in to our

workshops, removal and disposal of existing mesh, cleaning and inspection of frames

• Bonded, welded or moulded designs, as well as manufacture to customer requirements

• Optimum tensioning values, no distortion• Premium, precise and clean fabrication,

from single items through to mass production• Logistics services including spare parts

delivery and storage

We are also pleased to provide support in terms of advice and consultancy on improving the sieving process and optimising quality and economy.

• BOPP test sieve meshes deliver precise and reproducible test results

• Our entire range of test sieve meshes complies with ISO 3310-1 standards.

• On request, we can supply test sieve meshes complete with inspection document and aperture size certification

ISO 2194 Wire screens and plate screens for industrial purposes – Nominal sizes of apertures.

ISO 4782 Metal wire for industrial screens and woven wire cloth.

ISO 4783 Industrial wire screens and woven wire cloth – Guide to the choice of aperture size and wire diameter combinations.

Part 1: Generalities Part 2: Preferred combinations

for woven wire cloth

n INTERNATIONAL STANDARDS FOR WIRE MESHES

ISO 9044 Industrial woven wire cloth – Techni-cal requirements and testing.

ISO 565 Test sieves – Woven metal wire cloth and perforated plate – Nominal size of apertures.

ISO 3310-1 Test sieves – Technical requirements and testing.


6

n BOPP TEST SIEVE MESHES


The BOPP mesh counter can be used to identify product from 20 to 635 mesh.Key advantages:• Exceptionally precise assessment using 50x

magnification with good depth of field, grid and measuring scale integrated into the lens

• Light and easy to use• Robust construction

BOPP SI SPECIFICATIONS

ApertureSize

wmm

WireDiameter

dmm

MaximumToleranceaperture

Y%

Mesh*(K=twilled weave)

Open Area

Ao%

No. of Apertures

per per cm2 in2

Weight**

kg/m2

0.0200.0250.032

0.0360.0380.040

0.0420.045

0.050

0.053

0.056

0.0590.063

0.067

0.071

0.075

0.080

0.0850.090

0.0950.100

0.106

0.0200.0250.0250.0280.0280.0250.0230.0250.0280.0320.0360.0180.0320.0360.0300.0360.0400.0200.0240.0360.0400.0320.0360.0400.0320.0360.0400.0450.0250.0600.0300.0500.0360.0500.0300.0500.0560.0630.0400.0360.0400.0560.0630.0450.0500.0650.0500.0650.075

1515131310101010101010101010101010101010109999999998888888888888877777

635 K510 K445 K (450)425 K395 K (400)405 (400)405 (400)390 (400)375 (370)355 K (350)325 K405 (400)330315 K320 (325)295 K (300)280 K350330 (325)285 (280)275 K (270)290 (300)275 (270)265 K (270)280255 (250)245 (250)235275 (280)200 K250210230205 (200)230195 (200)187 (190)178 (180)205 (200)200195 (200)174166 (170)181 (180)169 (165)154 (150)163 (165)149 (150)140 (140)

2525322832 36 40 38353129 513431 393431 53 473532 40 3734 42 40 3734 5328 4934 46 36 53 383531 46 51 48 3835 46 44 37 46 3834

62.50040.00030.70027.700

24.40025.10025.10023.60021.60019.20016.40025.10016.80015.20015.60013.50012.30018.70016.80012.60011.50012.90011.80010.80012.00010.2009.4008.500

11.8006.2009.8006.8008.1006.4008.2005.9005.4004.8006.4006.2005.9004.6004.2005.1004.4003.6004.1003.4003.000

403.000258.000199.000179.000158.000163.000163.000153.000140.000124.000106.000163.000109.00098.300101.00087.20079.600

121.000109.000

81.40074.60083.30076.20070.00077.90065.80060.80055.30076.20040.00063.20044.10052.40041.30053.30038.20034.90031.50041.30040.60038.20030.30027.60032.90028.70023.70026.50022.10019.700

0.130.160.140.170.160.130.110.120.150.180.210.070.170.200.140.190.230.070.100.180.220.150.180.210.140.170.200.240.090.360.110.260.150.250.100.240.290.350.160.130.160.270.330.180.210.330.200.310.39

* True mesh count, in brackets approximate mesh count ** Calculated with a density 7,85 kg/dm3 for stainless steelSubject to technical changes. Latest data can be found on our website.

911101211979101315512141013155713151013151012141561581510157151515119111515131515141515

Min. recommendedScreenTension

N/cm

7


Subject to technical changes. Latest data can be found on our website.



0.112

0.1180.125

0.140

0.1500.160

0.1700.180

0.190

0.200

0.212

0.224

0.2360.2450.250

0.265

0.280

0.300

0.315

0.325

0.0710.0800.0560.0650.0800.0900.0650.0900.1000.1120.1000.0750.1000.1120.1250.1000.0900.1000.1250.1400.0900.1000.0900.1250.1400.1600.0900.1400.1000.1600.1800.1000.0650.1000.1600.2000.0500.1000.1000.1120.1800.2200.0650.1120.2000.1000.1120.1600.2000.100

77777777777777776666666666666666666666666666666666

139 (140)132 (130)146 (145)134 (135)124 (125)118 (120)124 (120)110106 (105)101 (100)102 (100)108 (105) 98 (100) 93 89 (90) 94 94 91 83 79 (80) 91 (90) 88 88 78 (80) 75 71 (70) 84 72 78 (80) 66 63 (60) 76 82 73 (74) 62 56 81 70 67 65 (64) 55 51 (50) 70 62 51 61 59 (60) 53 49 (50) 60

3734 46 43 3734 47 373431 36 46 383532 40 44 413532 46 43 48 383531 49 36 483431 49 62 51 3731 71 53 54 51 3731 68 53 36 58 54 44 37 58

2.9902.7103.3002.7702.3802.1602.3801.8901.7401.5701.6001.8101.4801.3501.2301.3701.3701.2801.070

9751.2801.1901.190

945865770

1.100805955680615885

1.040815595495

1.010750695650475400750590400580550445375555

19.30017.50021.30017.90015.40014.00015.40012.20011.20010.20010.30011.7009.5408.7207.9408.8508.8508.2306.9406.3008.2307.6707.6706.1105.5804.9807.0705.2106.1504.3803.9505.7106.7105.2703.8403.1906.5004.8404.4704.2003.0502.5804.8403.8002.5803.7503.5402.8602.4303.570

0.350.420.230.280.400.480.260.450.530.630.510.300.490.590.700.470.380.450.650.780.370.440.350.610.730.900.340.710.390.851.020.380.170.360.791.130.100.350.330.410.891.230.150.391.020.310.370.680.990.30

* True mesh count, in brackets approximate mesh count ** Calculated with a density 7,85 kg/dm3 for stainless steel

ApertureSize

wmm

WireDiameter

dmm


Y%


Open Area

Ao%

No. of Apertures

per per cm2 in2

Weight**

kg/m2


N/cm

151515151515151520202015152020151515202015151520202015201520201512152020715151520201015201515202015

8



0.335

0.355

0.375

0.400

0.425

0.450

0.4650.4750.500

0.5300.560

0.600

0.630

0.670

0.710

0.7500.800

0.850

0.1000.1400.1000.1400.1800.2200.1000.1400.1120.1400.1800.2200.2500.1120.1400.2800.1120.1400.1800.2000.2800.1250.1600.1600.2500.3200.1600.1600.2800.3600.1600.4000.1600.2500.2800.4000.1600.3600.1800.2800.3200.3600.4500.1800.2000.3200.5000.2000.4000.500

66666666666665555555555555555555555555555555555555

5853 (54)5651 (50)47445349 (50)504744 (45)41 (40)39 (40)4745 (44)3645434039 (40)354340383431 (30)373530283325322928253125292625242227252319.5242018.8

53044548541035030044537538034529526023534531520031528525023519028525023018015021019514012017510016013012094

14594

125100948774

1151008059916455

3.4102.8603.1202.6302.2501.9502.8602.4302.4602.2101.9201.6801.5302.2402.0201.3002.0401.8501.6301.5301.2101.8501.6001.4801.150960

1.3601.240

915760

1.120645

1.030835780610935610815660610565480745645515380585415355

0.290.520.280.500.771.070.270.480.310.460.710.991.220.300.441.410.280.420.650.781.360.340.510.491.061.590.470.451.191.790.432.030.410.901.091.970.391.600.461.011.261.542.220.440.511.162.440.481.632.35



59 50 61 51 44 38 62 53 61 55 48 42 38 63 57 36 64 58 51 48 38 62 56 57 44 37 59 60 44 37 62 36 64 51 48 37 65 42 64 51 48 44 37 65 64 51 38 66 46 40

ApertureSize

wmm

WireDiameter

dmm


Y%


Open Area

Ao%

No. of Apertures

per per cm2 in2

Weight**

kg/m2


N/cm

152015202020151515152020201515

15152020

15201520

151520

15

152020

15

1520

152020

15

9



0.90

0.95

1.00

1.061.081.12

1.18

1.25

1.321.40

1.501.60

1.80

2.00

2.24

0.200.360.500.200.320.220.320.400.500.560.630.220.360.220.250.360.450.560.220.450.500.630.220.250.400.630.800.500.220.250.450.710.630.220.280.360.400.500.801.000.320.800.320.560.630.901.000.360.630.90

55555555555555555555555555555555555555555555555555

23.020.018.1 (18)22.020.021.019.2 (19)18.1 (18)16.9 (17)16.3 (16)15.6 (16)19.8 (20)17.619.018.5 (19)17.216.2 (16)15.1 (15)18.115.615.114.017.3 (17)16.9 (17)15.413.512.414.015.7 (16)15.4 (15)13.7 (14)12.011.9 (12)14.013.5 (14)13.012.712.1 (12)10.69.8 (10)12.0 9.8 (10)10.9 (11) 9.9 (10) 9.7 (10) 8.8 (9) 8.5 9.8 (10) 8.9 (9) 8.1 (8)

67 51 41 68 56 67 57 51 44 41 38 69 56 70 67 57 51 44 71 52 49 43 72 69 57 44 37 53 75 72 57 44 50 77 72 67 64 58 44 38 72 48 74 61 58 48 44 74 61 51

8363517662675751444138614856534641355138353146443728243038372922223028262523171522151915141211151210

53540533049040043537033028526524539531036034529526023033024523019530028523518515519524523519014514019518517016014511095

14595

12098937772957865

0.461.312.270.441.020.500.991.452.122.553.090.481.140.460.581.111.642.370.441.581.892.780.420.531.232.683.961.740.380.481.393.032.370.340.530.841.021.513.394.880.613.130.561.561.923.554.230.631.763.28




ApertureSize

wmm

WireDiameter

dmm


Y%


Open Area

Ao%

No. of Apertures

per per cm2 in2

Weight**

kg/m2


N/cm

15

15201520

1520152020

15

152020

1515

15202020

20

20

20

10



2.50

2.80

3.003.15

3.353.55

4.00

4.50

5.00

5.60

6.30

7.10

8.00

9.0010.00

11.20

12.50

14.0016.00

0.500.711.000.500.901.121.000.560.801.250.900.800.901.250.711.001.400.800.901.400.800.901.251.601.121.251.601.001.251.401.801.401.801.251.602.002.201.401.802.501.602.501.602.002.502.802.002.503.20

5555555555555555555555555555555555555555555555555

8.57.9 (8)7.37.76.96.56.46.8 (7)6.45.8 (6)6.0 (6)5.85.75.35.45.1 (5)4.74.84.74.34.44.34.1 (4)3.83.83.73.53.53.43.33.13.02.92.72.62.52.32.22.22.02.01.91.81.81.71.51.41.41.3

69 61 51 72 57 51 56 72 64 51 62 67 64 55 72 64 55 72 69 58 74 72 64 57 69 67 60 74 70 67 60 70 64 75 69 64 65 77 72 64 77 67 79 74 69 69 79 75 69

111089776765655454343333322222222111111111111000000

72635359474240474133363433282926222322191919171514141212111110988765554433332222

1.061.993.630.962.784.063.181.072.064.512.421.872.314.131.362.544.611.531.914.221.401.743.184.932.372.904.521.742.633.235.082.934.622.153.395.085.492.183.496.352.545.792.313.505.295.932.824.296.77



ApertureSize

wmm

WireDiameter

dmm


Y%


Open Area

Ao%

No. of Apertures

per per cm2 in2

Weight**

kg/m2


N/cm

11



08.2

015

Mar

ketin

g/VO

R

The BOPP GroupHead Office in Zurich

n SWITZERLAND

G. BOPP + CO. AGBachmannweg 21CH-8046 ZürichPhone +41 (0)44 377 66 66E-Mail [email protected]

G. BOPP + CO. AGMühltobel CH-9427 WolfhaldenPhone +41 (0)71 888 60 66 E-Mail [email protected]

Filinox AGMühltobel CH-9427 WolfhaldenPhone +41 (0)71 888 60 22 E-Mail [email protected]

n GERMANY

Spörl oHGStaudenweg 1372517 SigmaringendorfPhone +49 (0) 7571 7393-0E-Mail [email protected]

n ENGLAND

G. BOPP & CO. LTD.Grange Close Clover Nook Industrial Park Somercotes, Derbyshire DE 55 4QT Phone +44 (0) 1773 521 266E-Mail [email protected]

n ITALY

BOPP Italia srlVia Sestriere 5/310060 Candiolo (TO)Phone +39 011 9624984E-Mail [email protected]

n SWEDEN

BOPP Utildi ABBox 118SE-312 22 LaholmPhone +46 430 792 50E-Mail [email protected]

n USA

G. BOPP USA Inc.4 Bill Horton WayWappingers Falls, NY 12590Phone +1 845 296 1065E-Mail [email protected]

n KOREA

Samwoo Enterprise (G. BOPP ASIA)Room 536, Shinan Metro Khan B/D1115, Bisan-Dong, Dongan-GuAnyang-City, Kyungki-DoPhone +82 31 388 0656E-Mail [email protected]

n CHINA

Samwoo Enterprise (G. BOPP ASIA)Room 508, Building BLotus SquareNo. 1050, Wuzhong Road, Minhang District ShanghaiPhone +86 21 6126-5496 / 5497E-Mail [email protected]

wire cloth for sieving and sizing - bopp bopp sieving meshes – distinctive quality features nese...

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