Niedner T.P.U. Lining Data

Municipal Hose

Forestry Hose

Hydro Hose Testers

T.P.U. Lining Data

Hose Weave Types

Encap V Hypalon

Encap Data

T.P.U. Lining Data Sheet

Thermoplastic Urethane Liner (T.P.U.) is a highly sophisticated urethane elastomer derived from a blend of polyether, polyester and isocyanate monomers. Unlike earlier urethanes that were strictly polyester derivatives, Thermoplastic Urethane Liner (T.P.U.) offers extreme lightweight and low temperature flexibility, and far superior fungal and hydrolysis resistance. Unlike neoprene compounds, Thermoplastic Urethane Liner (T.P.U.) has no volatiles and therefore is also approved for use with potable water.

PHYSICAL PROPERTIES

	T.P.U.	Neoprene
Tensile strength	3500 psi (24100 kPa)	1300 - 1500 psi (9000 - 10350 kPa)
Elongation	425%	425%
Shore A	80	60
Specific gravity	1.18	1.43
Permanent set	18%	25%
Hot air tensile retention	110%	70%
Wall thickness	0.015" (381 µm)	0.040" (1016 µm)
Free sulfur content	None	1% maximum

Low temperature resistance
Thermoplastic Urethane Liner (T.P.U.) will remain flexible even at temperatures in excess of -50°F (-46oC). The glass transition temperature is in excess of -100°F (-73°C). Most neoprene becomes intolerably stiff at -30°F (-34oC).

Air aging at elevated temperatures
When aged 50 and 100 days at 158°F (70°C) Thermoplastic Urethane Liner (T.P.U.) outperforms neoprene by 30% to 50%.

	Tensile	Elongation	Hardness (Shore A)
TPU 20 days	0 to -0%	+5%	-5
TPU 50 days	0 to -0%	+5%	-5
Neoprene 20 days	-30%	-100%	+10
Neoprene 50 days	-50%	-200%	+15

Water aging at elevated temperatures
When aged 20 and 50 days at 212°F (100°C) Thermoplastic Urethane Liner (T.P.U.) outperforms DESMOPAN by 37% to 45% and outperforms neoprene by 40% to 50%.

	Tensile	Elongation	Hardness (Shore A)
TPU 20 days	-37%	+14%	-8
TPU 50 days	-45%	+18%	-8
Neoprene 20 days	-40%	-110%	+11
Neoprene 50 days	-50%	-180%	+16

Resistance to oxygen
These are the results when aged 3 months at 158°F (70°C) at 300 psi (2100 kPa).

	Tensile	Elongation	Hardness (Shore A)
TPU	-25%	+20%	-1
Neoprene	-35%	-50%	-3

Resistance to ozone
When exposed for 120 hours to 150 ± 5 PPHM (parts per hundred million) at 122 ± 1.8°F (50oC ± 1oC) (ASTM # 1149.D).

Thermoplastic Urethane Liner (T.P.U.)	No cracking whatsoever under 7x magnification
Neoprene	No cracking whatsoever under 7x magnification

Resistance to ultraviolet radiation
When exposed to U.V. for 600 hours (equivalent to two years of sunlight)

Thermoplastic Urethane Liner (T.P.U.)	No degradation of physical properties
Neoprene	No degradation of physical properties

Resistance to fuels and oils
When immersed 85 days at 176°F (80°C)

	Tensile	Elongation	Hardness (Shore A)
Thermoplastic Urethane Liner (T.P.U.)
ASTM oil #1	-10%	+10%	+0.3
ASTM oil #2	0%	+13%	+7.8
ASTM oil #3	-15%	+12%	+15
Neoprene
ASTM oil #1	-26%	+50%	-8
ASTM oil #2	-35%	+65%	-12
ASTM oil #3	-31%	+80%	-10

Resistance to solvents
Neoprene has a fairly low resistance to solvents. Thermoplastic Urethane Liner, however, is completely resistant to most solvents. Only a few exotic solvents will dissolve it and these usually require elevated temperatures. These solvents would include ethyl acetate and terahydrofuran (THF). Highly aromatic solvents such as benzene, carbon tetrachloride and trichlorethelene will tend to swell Thermoplastic Urethane Liner slightly but will not attack it chemically.

Resistance to acids and caustic solutions
Neoprene is a fairly good polymer in regards to acid and base resistance. Thermoplastic Urethane Liner is quite good but should not be allowed to remain in contact with acids or bases outside the 4 - 7 pH range at elevated temperatures for long periods of time. Under these conditions degradation will take place due to hydrolysis.

Resistance to gasoline
Extended immersion in gasoline shows no ill effects on Thermoplastic Urethane Liner as long as the gasoline contains no alcohol (gasohol). If alcohol is present hydrolysis will occur in the course of time. Neoprene has fair resistance to gasoline.

Resistance to gases
Thermoplastic Urethane Liner is highly resistant to most gases such as propane, ethylene and natural gas. Gases such as hydrogen chloride, sulfur dioxide, nitric oxide, nitrogen monoxide, ammonia and hydrogen sulfide, which are capable of forming acidic or alkaline compounds in the presence of moisture, may damage it, however.

Resistance to microorganisms
Neoprene is typically an excellent fungal inhibitor. Polyurethanes have been subject to microbe attack, but because of the nature of the polyether-polyester blend in Thermoplastic Urethane Liner, the fungal resistance is excellent. Soil burial tests of up to 2 years duration show no signs of degradation. If, however, moisture, dirt and other contaminants are allowed to accumulate on the Thermoplastic Urethane for extended periods of time, these favorable conditions will support fungal growth and degradation could occur.

Contact