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Polyurethane Types & Performance

Pleiger Plastics’ types of polyurethanes are marketed under the registered name Plei-Tech®. The Plei-Tech® name is known globally as quality, high-performance polyurethanes. The proper selection of suitable types of polyurethane depends on a variety of considerations. These include temperature and environmental concerns, chemical resistance, cut and tear resistance, hardness, abrasion resistance, dynamic performance, and cost. Most molded parts require consideration of two or more of these characteristics, and a Plei-Tech® elastomer can be custom molded with these needs in mind.

There are often several Plei-Tech® elastomers that meet a client’s need in a particular application. In these situations, prototype parts of each compound are produced and field-tested, so our client can decide on the most cost-effective polyurethane compound. This method prevents costly “over-engineering” polyurethane parts and saves money.

Polyester Type 1 Polyester Type 2 Polyester Type 3 Polyester Type 4 Polyether Polycaprolactone Polycarbonate
MDI PT-22 PT-31 PT-23 PT-24 PT-25 PT-92 PT-93
NDI PT-15 PT-15 PT-12 PT-13 PT-66
TDI PT-00 PT-95
PPDI PT-10 PT-10 PT-10

Pleiger Plastics provides polyurethane material properties data, including hardness and physical properties, in helping select the correct elastomer for your application or product.

PLEI-TECH® 00

Plei-Tech® 00 is a polyester compound developed in conjunction with Plei-Tech® 22 to offer alternatives to Plei-Tech® 15. Plei-Tech® 00 offers outstanding tear strength, good abrasion resistance, excellent resistance to oil products, and is suited for moderate dynamic loading. Plei-Tech® 00 is available in 80°A to 95°A. PleiTech® 00 falls short of Plei-Tech® 22, Plei-Tech® 23, Plei-Tech® 24, Plei-Tech® 25 and Plei-Tech® 15 in solvent resistance. The maximum service temperature is 200°F. The standard color is amber. However, this product is not color stable.

PHYSICAL PROPERTY TEST METHOD UNITS HARDNESS
Hardness A 80 90 95
Hardness D 50
100% Modulus D 412 PSI 700 1150 2000
300% Modulus D 412 PSI 1350 2200 4000
Tensile Strength D 412 PSI 7200 7300 7400
Ultimate Elongation D 412 % 600 525 450
Split Tear D 470 PLI 130 150 175
Die C Tear D 624 PLI 490 600 760
Resilience D 2632 % 33 27 27
Compressive odulus D 575 PSI
5% 160 250 475
10% 275 400 750
15% 375 550 1050
20% 525 775 1450
25% 725 1100 1950
Brittle Point D 746 F
Specific Gravity D 792 1.25 1.27 1.29
Compression Set
(22 Hours at 70C)
D 385
Method B
% 35 32 33

PLEI-TECH® 10

Plei-Tech® 10 is a high-performance polyurethane best suited for the most demanding applications. Plei-Tech® 10 offers outstanding cut, abrasion, and solvent resistance. In addition to exceptional physical properties, Plei-Tech® 10 also provides excellent dynamic properties. The one setback of the material is that it takes a high compression set. Plei-Tech® 10 is available in 80°A, 90°A, 93°, and 97°A hardnesses. The maximum service temperature is 275°F. Only available in natural color (cream). Typical applications are bumpers, diaphragms, rollers, and hydrocyclones.

PHYSICAL PROPERTY TEST METHOD UNITS HARDNESS
Hardness A 80 92 97
Hardness D 55
100% Modulus D 412 PSI 550 1300 1825
300% Modulus D 412 PSI 1070 2000 2250
Tensile Strength D 412 PSI 4950 6300 5150
Ultimate Elongation D 412 % 525 720 595
Split Tear D470 PLI 93 645 145
Die C Tear D624 PLI 390 705 635
Resilience D 2632 % 45 55 53
Compression Set
(24 Hours at 70°C)
D385
Method B
% 36 53 40
Compressive Modulus D 575 PSI
5%
10%
15%
20%
25%
Brittle Point D 746 F
Specific Gravity D792 1.19 1.19 1.09

PLEI-TECH® 15 (Vulkollan®)

Plei-Tech® 15 is also known as Vulkollan® (trademark name of Covestro). Plei-Tech 15 offers excellent abrasion and cut resistance and is well suited for high dynamic loading. Plei-Tech® 15 performs well in solvent and oil environments and is available in hardness from 60°A to 60°D. This product is also known as a foam with tremendous dynamic performance and abrasion resistance. This compound has MSHA approval. The maximum service temperature is 200°F. Color is natural: light brown that turns dark brown when exposed to UV light, and no properties are lost in this color transformation.

PHYSICAL PROPERTY TEST METHOD UNITS HARDNESS
Hardness A 63 73 83 93
Hardness D
100% Modulus D 412 PSI 500 650 800 1500
300% Modulus D 412 PSI 990 1350 1400 2100
Tensile Strength D 412 PSI 3950 4500 5500 6000
Ultimate Elongation D 412 % 450 450 500 700
Split Tear D470 PLI 36 43 175 200
Die C Tear D624 PLI 295 375 475 750
Resilience D 2632 % 46 47 55 48
Compression Set
(24 Hours at 70°C)
D385
Method B
% 19 17 15 15
Taber Abrasion
(H-18 Wheel 5000 Cycles)
D-1044-78 mg Loss 7 7 8 16

PLEI-TECH® 22

Plei-Tech® 22 is a polyester compound developed by Pleiger Plastics Company as an alternative to Plei-Tech® 15. Plei-Tech® 22 offers excellent abrasion and solvent resistance compared to other polyurethane compounds. Plei-Tech® 22 is available in hardness from 40°A to 60°D. Plei-Tech® 22 is not suited for applications involving high dynamic loading. This compound is MSHA approvable. The maximum service temperature is 190°F. The standard color is natural (cream). However, color coding is available. Typical applications are scrapers, snowplows, and squeegees.

PHYSICAL PROPERTY TEST METHOD UNITS HARDNESS
Hardness A 60 70 80 85 95
Hardness D
100% Modulus D 412 PSI 240 480 680 1100 1810
300% Modulus D 412 PSI 350 1000 1600 2900 3600
Tensile Strength D 412 PSI 2700 4600 5600 6000 7000
Ultimate Elongation D 412 % 600 490 460 400 450
Split Tear D 470 PLI 40 70 80 95 210
Die C Tear D 624 PLI 155 350 370 410 690
Resilience D 2632 % 50 27 23 25 30
Compression Set
(24 Hours at 70°C)
D 385
Method B
% 20 30 25 20 35
Taber Abrasion
(H-18 Wheel 5000 Cycles)
D-1044-78 mg Loss 54 40 22 17
Specific Gravity D 792 1.2 1.22 1.23 1.24 1.26

PLEI-TECH® 23

Plei-Tech® 23 is a polyester polyurethane. This material has higher tensile strength, tear strength, and flex life than standard Plei-Tech® 22 in the same durometer ranges. This compound is not as good in dynamics, has a higher compression set, and has slightly lower solvent resistance as Plei-Tech® 22. Available from 60°A to 88°A and can be colored. Maximum service temperature 190°F. Typical applications are scrapers and sheets.

PHYSICAL PROPERTY TEST METHOD UNITS HARDNESS
Hardness A 60 70 80 85
100% Modulus D412 PSI 300 500 700 650
300% Modulus D 412 PSI 500 950 1600 1700
Tensile Strength D 412 PSI 3200 4500 5900 6100
Ultimate Elongation D 412 % 525 475 475 650
Split Tear D470 PLI 70 90 110 140
Die C Tear D624 PLI 220 340 460 540
Resilience D 2632 % 37 30 28 25
Compression Set
(22 Hours at 70°C)
D385
Method B
% 30 35 40 45
Specific Gravity D792 1.2 1.22 1.23 1.26

PLEI-TECH® 95

Plei-Tech® 95 is a polyether polyurethane. Plei-Tech® 95 offers excellent performance in dynamic loading, shock absorption, and water environments. Plei-Tech® 95 falls slightly short of other Plei-Tech® compounds in abrasion and cut resistance. Plei-Tech® 95 is available in hardnesses from 80°A to 75°D. Plei-Tech® 95 is not suited for applications involving solvents or petroleum-based oils. This product has general MSHA approval. The maximum service temperature is 200°F. The standard color is blue. However, this material is not color stable. Typical applications are bumpers, balls, and hydrocyclones.

PHYSICAL PROPERTY TEST METHOD UNITS HARDNESS
Hardness A 80 90 95
Hardness D 50 60 75
100% Modulus D 412 PSI 580 1100 2200 3200 4000
300% Modulus D 412 PSI 850 1650 4050 6500
Tensile Strength D 412 PSI 3550 4080 5600 7100 7500
Ultimate Elongation D 412 % 730 450 350 310 230
Split Tear D470 PLI 82 65 125 115 145
Die C Tear D624 PLI 300 370 500 630 950
Resilience D 2632 % 56 50 42 42
Compression Set
(24 Hours at 70°C)
D385
Method B
% 41 25 32 28
Compressive Modulus D 575 PSI
5% 110 210 500 1000 2300
10% 180 350 840 1600 3950
15% 270 490 1200 2200 5100
20% 375 680 1650 3000 6000
25% 525 940 2100 4000 8000
Brittle Point D 746 F -94 -94 -94 -94
Specific Gravity D792 1.07 1.08 1.13 1.16 1.2

LUBRITHANE

Lubrithane is a polyurethane with special additives to provide a reduced coefficient of friction. Lubrithane is ideal for belt scraping applications because of its good abrasion resistance and low coefficient of friction. Lubrithane is available in hardnesses from 60°A to 50°D. The maximum service temperature is 190°F. The color is black.

Typical Frictional Properties (Coefficient of Friction)
(ASTM D 1894-87)
Lubrithane on Rubber UHMW on Rubber
Static Kinetic Static Kinetic
Dry 0.18-0.20 0.160-0.17 0.44-0.46 0.34-0.44
Wet 0.19-0.20 0.13-0.14 0.51-0.54 0.35-0.40
Lubrithane on Steel UHMW on Steel
Static Kinetic Static Kinetic
Dry 0.15-0.17 0.14-0.17 0.12-0.18 0.12-0.18
Wet 0.16-0.18 0.16-0.18 0.12-0.18 0.12-0.18
Rubber – Goodyear Conveyor Belting 220 PIW WingfootII
Steel finish = ASTM D 1894-87
TYPICAL PHYSICAL PROPERTIES
ASTM UNIT LUBRITHANE
Hardness D-2240-81 Shore A 93
Tensile Strength D-412-80 PSI 4993
Elongation & Break D-412-80 % 403
Stress D-412-80 PSI
At 100% 1862
At 200% 2165
At 300% 2762
Die C Tear Strength D-624-81 PSI 618
Taber Abrasion D-1044-78 Mg Loss 23.5
Plei-Tech® 15 Foam Compression Deflection Graph

PLEI-TECH® 15 FOAM

Plei-Tech® 15 Foam is an open/closed-cell polyurethane foam-based upon Vulkollan® (Plei-Tech ®15) chemistry. This product has tremendous dynamic performance and abrasion resistance and is used where high-frequency, low loads are present. Density ranges are from .35 g/cc to .60 g/cc. This material is ideal for bumpers and cushions which require high displacements. The maximum service temperature is 200°F. Color is natural: light brown that turns to dark brown when exposed to UV light. (No properties are lost in this color transformation.)

PHYSICAL PROPERTY TEST METHOD UNITS DENSITY
Density ISO 845 Kg/M^3 350 450 550 650 750
gr/cc .35 .45 .55 .65 .75
Lb/Ft^3 21.8 28.1 34.3 40.6 46.8
Tensile Strength ISO 37 Mpa 4.0 5.5 7.5 9.0 10.0
Ultimate Elongation ISO 37 % 390 430 465 475 490
Tear Resistance ISO 34 KN/M 8 12 16 20 24
Resilience ISO 4662 % 60 60 60 60 60
Compression Set ISO 815 %
70 Hours at 23°C 3.0 3.0 3.0 3.0 3.0
70 Hours at 70°C 4.0 6.0 8.0 8.0 9.0
Compressive Modulus 40mm Cube
at
50mm/min
Mpa
10% 0.08 0.15 0.30 0.40 0.60
20% 0.13 0.26 0.45 0.65 0.85
30% 0.19 0.37 0.61 1.10 1.60
40% 0.26 0.48 0.80 1.40 2.30
50% 0.45 0.70 1.40 3.20 4.00
60% 0.75 1.35 2.60 4.40 6.80
70% 2.00 3.10 5.20