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樂泰408

典型用途：芯吸級別

顏色：清澈

縫隙填充：0.05mm

類型：低氣味/低白樺烷氧基

粘度：2600

拉伸剪切強度：5

溫度范圍：-53°C到71°C

固化速度：初固50秒全固24小時

比重：1.05

adhesive with low odour and non-blooming characteristics.
TYPICAL APPLICATIONS
Bonding applications where vapour control is difficult.
PROPERTIES OF UNCURED MATERIAL
Typical
Value Range
Chemical Type Alkoxy-ethyl
cyanoacrylate
Appearance Water white to straw
coloured liquid
Specific Gravity @ 25°C 1.1
Viscosity @ 25°C, mPa.s (cP)
Brookfield LVF
Spindle #1 @ 60 rpm 7 4 to 10
Flash Point (TCC), °C >82
TYPICAL CURING PERFORMANCE
Under normal conditions, the surface moisture initiates the
hardening process. Although full functional strength is
developed in a relatively short time, curing continues for at
least 24 hours before full chemical/solvent resistance is
developed.
Cure speed vs. substrate
The rate of cure will depend on substrate used. The table
below shows the fixture time achieved on different materials at
22°C , 50% relative humidity. This is defined as the time to
develop a shear strength of 0.1 N/mm² (14.5 psi) tested on
specimens according to ASTM D1002.
Substrate Fixture Time, seconds
Steel (degreased) 30 to 70
Aluminium 5 to 20
Neoprene Nitrile rubber ABS 20 to 60

PVC 20 to 50
Polycarbonate 20 to 60
Phenolic materials 30 to 60
Cure speed vs. bond gap
The rate of cure will depend on the bondline gap. High cure
speed is favoured by thin bond lines. Increasing the bond gap
will slow down the rate of cure.
Cure speed vs. activator
Where cure speed is unacceptably long due to large gaps,
applying activator to the surface will improve cure speed.
However, this can reduce the ultimate strength of the bond,
therefore testing is recommended to confirm effect.

TYPICAL PROPERTIES OF CURED MATERIAL
Physical Properties
Coefficient of thermal expansion, ASTM D696, K-1 80x10-6
Coefficient of thermal conductivity, ASTM C177, W.m-1 K-1 0.1
Glass Transition temperature, ASTM E228, °C
Electrical Properties
Dielectric constant & loss, 25°C, ASTM D150:
Constant Loss
measured at 50Hz: 2.3 1kHz: 2.3 1mHz: 2.3 Volume resistivity, ASTM D257,W.cm: 1 x 1016
Dielectric strength, ASTM D149, kV/mm 25
PERFORMANCE OF CURED MATERIAL
(After 24 hr at 22°C) Typical
Value Range
Shear Strength, ASTM D1002, DIN 53283
Grit Blasted Steel, N/mm² 18 14 to 22
(psi) (2610) (2030 to 3190)
Etched Aluminium, N/mm² 12 9 to 15
(psi) (1740) (1305 to 2175)
ABS, N/mm² >6
(psi) (>870)
PVC, N/mm² 5 2 to 8
(psi) (725) (290 to 1160)
Polycarbonate, N/mm² >3
(psi) (>435)
Phenolic, N/mm² 10 5 to 15
(psi) (145) (700 to 2200)
Neoprene rubber, N/mm² >10
(psi) (>1450)
Nitrile rubber, N/mm² >10
(psi) (>1450)
Tensile Strength, ASTM D2095, DIN 53288
Grit Blasted Steel, N/mm² 17.5 10 to 25
(psi) (2538) (1450 to 3600)

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