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Water Finish Neutral Kraft®
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Water Finish Neutral Kraft®
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Physical Tests
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Nominal
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Apparent
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Tear
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Tensile
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Gurley
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Thickness*
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Density
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L
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C
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L
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C
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Density
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Mullen
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Ply Adhesion
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.005
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1.00 – 1.10
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140
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225
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90
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20
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1500
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120
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45
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.010
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0.95 – 1.05
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360
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450
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145
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50
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1000
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180
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45
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*Thickness tolerance
±
10%
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Chemical Tests
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Moisture content
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- 9% maximum
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Ash
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- less than 0.5%
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Alcohol solubility
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- less than 1.0%
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pH water extract
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- 6.5 to 8.0
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Water soluble chlorides
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- less than 32 ppm.
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Aqueous extract conductivity
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- 10 micro mhos maximum
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Thermal Stability
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When baked in an over at
150°C for one
hour, the sheet shows no evidence of devitalization as measured by its ability
to be wound around a mandrel ten times the paper thickness without signs of
cracking or delamination.
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Electrical Tests
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Dielectric Breakdown
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Dielectric
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Conduction
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Voltage
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Strength
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Paths*
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.005
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1375 volts
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275 volts / mil
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1.75
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.010
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2250 volts
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225 volts / mil
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1.25
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* Conduction paths per 1000 square feet at an electrical
stress of 100 AV volts per mil of thickness.
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Power Factor
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Less than 0.4% when measured on vacuum dried samples at
80°C, 15 psi
electrode pressure, and a stress of 50 volts per mil 60 cycle
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Uses
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This material is recommended for use as electrical
insulation for Class A applications, wherever the requirements call for the
highest standards of paper insulation with the description above. It is widely
used as slot insulation in motors and generators, coil winding insulation,
barrier insulation in transformers and voltage regulators, and in various
applications calling for oil impregnation. It meets the requirements of ASTM
D-1305 Class III and IV as applicable.
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CONDITIONS: Determination of the suitability of the
material to the use contemplated is the user’s responsibility. Users
assume all risks resulting from the use of our products and must confirm
adaptability through their own tests. Liability will in no event exceed value of
the material sold.
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eisp_006_WaterFin_NeuKraft
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9/00
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