Search
Filters
Close

Coil Bobbins

BobbinsAlthough the Nylon 6/6 is the bobbin of choice for the audio transformer industry, EDCOR has taken this a step further to meet the class B 130 degrees C UL temperature classification. All of EDCOR's transformer bobbins are Nylon 6/6 GF-30, unless specified by the customer, and are RoHS compliant.

Nylon 6/6
Due to the combination of high temperature properties, toughness and resistance to chemicals, Nylon 6/6 accounts for approximately 43% to 50% of bobbins made industry-wide today. It is resistant to impacts, fuels, lubricants and most chemicals. And due to its electrical properties, it is widely used in the electronics field.

Nylon 6/6 GF-30 (glass-fiber reinforced)
All NYLON 6/6 materials have high mechanical strength and superior resistance to wear and organic chemicals, but NYLON 6/6 GF30 has more than double the strength and stiffness of unreinforced nylons and a heat deflection temperature which approaches its melting point. NYLON 6/6 GF-30 is a 30% glass-fiber-reinforced nylon 6/6 material whose important properties include high tensile and flexural strength, stiffness, excellent heat deflection temperature, and superior abrasion and wear resistance.

 

Physical Properties
ASTM Test Method
Units
Nylon 6/6
Nylon 6/6 GF30
Density
D792
lbs/cu in
0.0412
0.0488
Specific Gravity
D792
----
1.14
1.35
Water absorption, 24 hours, 73°F (23°C)
D570
%
8.5
0.7
Mechanical Properties
ASTM Test Method
Units
Nylon 6/6
Nylon 6/6 GF30
Tensile Strength 73°F
D638
psi
12,400
27,000
Elongation 73° F
D638
%
90
3
Flexural Strength, 73° F
D790
psi
17,000
39,100
Flexural Modulus, 73°F
D790
psi
4.1 X 105
12 X 105
Izod Impact Strength, Notched, 73°F
D256
----
R120 - M79
M101
Rockwell Hardness
D785
ft-lbs/in.
1.2
2.1
Thermal Properties
ASTM Test Method
Units
Nylon 6/6
Nylon 6/6 GF30
Heat Deflection 
66 psi
264 psi
D648
D648
degrees F
degrees F
455
194
490
482
Max.Temperature Long Term
Short Term
----
degrees F
degrees F
170
355
230
465
Coefficient of Linear Thermal Expansion
 see below
 
 
 
-20 to -200° F
200 to 460° F
D696
D696
in./in./degrees F
----
4.5 X 10-5
5.0 X 10-5
1.2 X 105
----
Electrical Properties
ASTM Test Method
Units
Nylon 6/6
Nylon 6/6 GF30
Volume Resistivity,  73°F
D257
ohm-cm
1015
1015
Dielectric Constant, 60 Hz, 73°F, 50% RH
D150
----
4.0
----
Dielectric Strength
D149
V/mil
600
530