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Polyamide - Nylon 6, 6 ( PA 6,6 )

Material Information

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Fiber Film Granule Mesh Rod Sheet Sphere
Fiber Film Granule Mesh Rod Sheet Sphere

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Common Brand Names:
Akulon S, Maranyl A, Utramid A, Zytel
 
General Description:  

General Information for 'Nylons'.

A family of similar semi-crystalline engineering thermoplastics generally synthesized from straight chain aliphatic acids and amines. Each particular nylon is described by one or two numbers eg nylon 6 or 6,6 where the number is the number of carbon atoms in the amine and acid monomers. Where a single number is used the monomer is an Alpha amino-acid (or its lactam) and the amide links in the polymer are all "head-to-tail". Where two numbers are used the monomers are a diamine and diacid and the amide links alternate "head-to-tail"/"tail-to-head". The first number refers to the diamine, the second to the diacid. Some nylons use aromatic monomers which are denoted by letters eg T for terephthalic and I for isophthalic components.

Nylons generally are strong, tough (but notch-sensitive), rather resilient polymers with good barrier properties and high fatigue and abrasion resistance but high water absorption (slow in thick sections) accompanied by an increase in dimensions which can be as much as 3% under extreme circumstances. Nylons have good resistance to oils, greases, solvents and alkalis but not to acids which tend to hydrolyse them. The most common nylons are 6 and 6,6 and in the individual descriptions the others are described in relation to them.

General Description : A semi-crystalline, off-white engineering thermoplastic that is the strongest and most abrasion resistant unreinforced aliphatic nylon with better low temperature toughness than Nylon 6 or acetal. Its very low melt viscosity can give industrial processing difficulties and weathering can cause embrittlement and color change unless it is stabilized or protected. Available with a wide range of fillers , notably glass fiber which gives a marked increase in stiffness and solid and liquid (oil) lubricants. Super-tough grades are also available whose impact properties and low notch sensitivity are amongst the best of all engineering thermoplastics.

Applications include mainly engineering components eg gears, bearings, nuts, bolts, rivets and wheels and power tool casings and rocker box covers. Widely used as monofilament for brushes etc and fiber, notable for its resilience and high abrasion resistance, for apparel, carpet and industrial end-uses.

   

Chemical Resistance

Acids - concentrated Poor
Acids - dilute Poor
Alcohols Good
Alkalis Good-Fair
Aromatic hydrocarbons Good
Greases and Oils Good
Halogenated Hydrocarbons Good-Poor
Halogens Poor
Ketones Good

Electrical Properties

Dielectric constant @1MHz 3.4
Dielectric strength ( kV mm-1 ) 25
Dissipation factor @ 1kHz 0.2
Surface resistivity ( Ohm/sq ) 1011
Volume resistivity ( Ohmcm ) 1013

Mechanical Properties

Abrasive resistance - ASTM D1044 ( mg/1000 cycles ) 3-5
Coefficient of friction 0.2-0.3
Elongation at break ( % ) 40
Hardness - Rockwell M89
Izod impact strength ( J m-1 ) 40-110
Poisson's ratio 0.41
Tensile modulus ( GPa ) 3.3
Tensile strength ( MPa ) 82

Physical Properties

Density ( g cm-3 ) 1.14
Flammability HB
Limiting oxygen index ( % ) 23
Radiation resistance Fair
Refractive index 1.53
Resistance to Ultra-violet Poor
Water absorption ( % ) 8.5
Water absorption - equilibrium ( % ) 8
Water absorption - over 24 hours ( % ) 2.3

Thermal Properties

Coefficient of thermal expansion ( x10-6 K-1 ) 90
Heat-deflection temperature - 0.45MPa ( C ) 200
Heat-deflection temperature - 1.8MPa ( C ) 100
Lower working temperature ( C ) -30
Specific heat ( J K-1 kg-1 ) 1670
Thermal conductivity @23C ( W m-1 K-1 ) 0.25
Upper working temperature ( C ) 80-180

Properties for Polyamide - Nylon 6, 6 Chopped Fiber

Property Value
Material Medium High tenacity
Density g cm-3 1.14 1.14
Extension to break % 37 14-22
Shrinkage @100C % 9 9-11
Specific Tenacity cN/tex 43 60-80

Properties for Polyamide - Nylon 6, 6 Fiber

Property Value
Material Medium High tenacity
Density g cm-3 1.14 1.14
Extension to break % 37 14-22
Shrinkage @100C % 9 9-11
Specific Tenacity cN/tex 43 60-80

Properties for Polyamide - Nylon 6, 6 Film

Property Value
Dielectric Constant @ 1MHz 2.3
Dielectric Strength @25µm thick kV mm-1 34
Dissipation Factor @1MHz 0.004
Elongation at Break % 200
Heat-sealing Temperature C 245
Permeability to Carbon Dioxide @25C x10-13 cm3. cm cm-2 s-1 Pa-1 0.06
Permeability to Oxygen @25C x10-13 cm3. cm cm-2 s-1 Pa-1 0.004
Permeability to Water @38C x10-13 cm3. cm cm-2 s-1 Pa-1 1200

Buy Polyamide - Nylon 6, 6 on-line

We stock and supply the following standard forms:
Fiber Film Granule Mesh Rod Sheet Sphere
Fiber Film Granule Mesh Rod Sheet Sphere

Choose a form to search our on-line catalog  

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