General material information without obligation




 

Physical and Mechanical Properties


With 1,07-1,14 g/cm³ normal Nylon is a middle-weight, partially crystalline technical all-round thermoplastic material. Nylon absorbs a relatively high amount of water (hygroscopic) and, depending on the type of Nylon and its application injection moulded parts can be acclimatised in the factory to the ambient climate by conditioning (storing in warm water), as far as diffusion of atmospheric humidity doesn't suffices. Only then does normal Nylon demonstrate its good ductility, its excellent notch impact strength, its good abrasion resistance, its good damping and its good resistance to stress cracks (followed by reduced hardness and strength and by volume change / measure change). These qualities normally have to be present in the Nylon when the parts are being assembled.
Significant increases in strength are achieved by stretching of polyamide fibers:

 


 
 
Nylon before stretching   Nylon after stretching




Nylon is characterized by very high service life and resistance to aging. Glass fibre reinforced Nylon displays a higher E-module and a higher toughness. The abrasion behavior is good. If used with bearings, an additive of MoS2 or PTFE/Silicone gives excellent slip and minimal lubrication qualities.
Nylon is suitable for sawing, boring, turning, grinding, polishing, welding (see below), lacquering and printing.
 
Important note
If parts made from Nylon have not been stored in the original packaging but at a dry and warm place, then they should be kept in warm water for 24-48 hours before assembly. Nylon parts shouldn't be assembled in frozen condition (i.e. after transport or stocking). Minimum core temperature of articles for assembly is > 4 °C (depending on environment temperature 24-48 h in closed original packaging are needed for rewarming).

 

Optical and Chemical Properties


Nylons can be disposed by its polar amide groups in its polymer chains upon others into following basic grades: 4.6, 6, 6.6, 6.10, 11, 12.
Depending on the type of Nylon the basic tint is yellow-white, water-white or light-white and is all-round dye able. Nylon goes yellow with age and if it is exposed to UV-rays. Thus the colour is not consistent over a long period if used in parts in its natural colour.

Given increased crystalline properties Nylon displays good resistance to aliphatic and aromatic hydrocarbons, oil, lubricants, grease, some types of alcohol, ester, ketones, ether, organic and inorganic bases up to a medium concentration, chlorated hydrocarbons such as carbon tetrachloride, Freon, paints and varnishes. Chloroform and methyl chloride produce very strong swelling. Alcohols such as methanol and ethanol have a similar effect as water or salt-water (light swelling, low reduced mechanical strength). Nylon is not resistant to solutions of oxidisation media, mineral acids and formic acid, strong lyes, phenols, cresols and glycols.
Resistance (without obligation)

 

Resistance to Weather and Ageing


Nylon is adequately resistant to ageing and weather conditions. For external use the level of resistance can be increased by using a correct colouration , e.g. soot. In the case of glass fibre reinforcing Nylon the surface enlargement of parts produced by the glass fibre means that surface of parts is more stressed. The mechanical properties are not influenced to any great extent. Addition of suitable UV stabilisers (HALS) prolongates outdoor usage of PA moulded parts in any colours up to 10-20 years.

 

Special Uses - Product Ranges


Glass fibre and other fillers which increase strength, MoS2 and PTFE/Silicone designed to improve slide qualities, various stabilisers, materials with good conductivity or the improvement of the electrical conductivity - fibers, textiles, tubes, screws, nuts, shims, cogs, door and furniture fittings, slide bearings, sliding elements, bearing sleeves, fan wheels, pump casings, filter pads.

 

Thermic Properties

 
Nylon 6 and Nylon 6.6 are cold-resistant to at least -30 °C and long-term heat resistant to at most +105 °C, Nylon 6.6 to at most +120°C. Nylon 11 and Nylon 12 are cold-resistant to at least -50 °C and long-term heat resistant to at most +80 °C. By addition of stabilizers as well as plasticisers cold and heat resistance can be enlarged to values of -60 °C up to +110 °C, temporary up to 160 °C. Glow properties and thermal forming consistency are good in the case of normal Nylon. In the case of glass fibre reinforced Nylon the wick effect of the glass fibre leads to a moderate flammability. The thermal forming consistence is even better than with non-reinforced Nylon. Under increasing heat Nylon keeps it shape very well. In the case of glass fibre reinforced Nylon the heat expansion is still smaller. Depending on load and the design of the parts the range of temperature for continuous use is between approx. -40°C and 80-120°C. Nylon begins to disintegrate at temperatures above 300°C. It lits into flames upwards of about 450-500°C. It burns with a low flame and a significant smell of burnt animal horn and then it begins to drip and crackle, forms strands, and in most cases the flames go out after a short time. For a short time Nylon 6 can also withstand temperatures of up to 200°C and Nylon 6.6 with 50% glass fibre can withstand temperatures of up to 250°C.

 

Physiological Behaviour and Joint


It is not advisable to bring Nylon into contact with foodstuff, which contain water if these are subject to heat for a longer period of time. Dry, non-reinforced injection-moulded parts made of Nylon can be welded via ultrasonic welding, friction- or vibration welding and hot element welding to give sound, tough joints. Dampness and glass fibre reduce the weld ability. For purposes of adhesion, solvents and varnishes based on phenol or resorcinol, concentrated formic acid, impact adhesives and cyanate glues are particularly suited for Nylon.




Resistance of various plastics (without obligation)


 
Sign Meaning
++ resistant
+ conditionally resistant
= Non-resistant
 
 





 
Material Concentration Rubber Polyamide Polyurethane Polypropylene
Wastewater - - ++ + -
Acetaldehyde 40% + + = +
Acetone - ++ ++ = +
Acetylene - ++ ++ ++ -
Acrylic acid >30°C - - = = -
Ethanol amine - - - = -
Ether - - ++ ++ -
Ethyl acetate - + ++ = -
Ethyl alcohol - ++ + ++ ++
Ethylene - - - ++ -
Caustic potash - - - = -
Caustic soda - - - = -
Alkyl benzene - - ++ - -
Alkyl alcohol - ++ + = -
Aluminium acetate - - ++ - -
Formic acid 10% + = = ++ (max. 60°C)
Amine, aliphatic - - ++ - -
Amino acid mixtures - - ++ - -
Liquid ammonia 20% ++ ++ = ++
Ammonium salts - - ++ - ++
Ammonium bicarbonate - - ++ - -
Ammonium rhodanide - - ++ - -
Ammonium hydroxyde - - - = -
Ammonium carbonate - ++ - = -
Ammonium nitrate - + - ++ ++
Ammonium sulphate - + - ++ ++
Amylacetate - ++ ++ = ++
Amyl alcohol - ++ ++ + ++
Aniline - = + = ++
Antra quinone, 85 % C - - ++ - -
Malic acid - - ++ + ++ (max. 60°C)
Barium salts - ++ + ++ ++
Cotton seed oil - - - ++ -
Benzene, Petrol ether - = ++ ++ =
Beer - ++ ++ ++ -
Bitumen - = ++ ++ -
Lead acetate, aqueous 10% + ++ ++ =
Lead nitrate - ++ - ++ -
Borax - ++ - ++ -
Boric acid, aqueous 10% ++ + ++ +
Bromine - = = = =
Butter - = ++ ++ -
Butane - = ++ ++ -
Carbolineum - = ++ = -
Casein - - ++ - -
Chlorine, chlorine water - = = = =
Citric acid, aqueous 10% ++ ++ - -
Citrus oils - - ++ - -
Chromic acids, aqueous 10% = + + =
Cobalt acids, aqueous 20% - + - -
Cyclohexanol - + ++ + -
Diethyleneglycol - ++ ++ ++ -
Dichlorobenzol - = ++ = =
Dichlorobutylene - = - = -
Dimethylether - + ++ ++ ++
Dimethylaniline - - - = -
Dimethyl formic amide - + ++ = ++ (max. 20°C)
Inert gases - - ++ - -
Pure acetic acid - + - = ++
Iron chloride, acidic 10% + = + ++ (max. 20°C)
Iron sulphate - - - ++ -
Decalcifier, aqueous 10% - ++ - -
Crude oil - = ++ ++ -
Ethanoic acid 30% = ++ = ++
Fatty acids - - ++ ++ -
Fir leaf oil - = - ++ -
Fluorine - = = = =
Formaldehyde 30% ++ ++ + ++
Formic amide, pure - ++ ++ + -
Furfural - - ++ = -
Gelatine - - - ++ -
Glucose - ++ - ++ -
Glycerine - ++ ++ ++ ++
Glycol - ++ + + ++
Uric acid, aqueous 10% ++ ++ - -
Hexane - = ++ ++ -
Hydraulic liquids - = ++ = -
Isopropyl chloride - = - = -
Isoprophyl ether - ++ - ++ -
Tincture of iodine - ++ = = ++
Potassium chloride 10% + ++ ++ ++ (max. 20°C)
Potassium cyanide - - - + -
Potassium hydroxide - - ++ = ++
Potassium sulphate - ++ - ++ ++
Potassium salts - - - + ++
Nirohydrochloric acid - = = = =
Carbon monoxide, hot - - ++ = -
Carbonic acid - - - ++ -
Coconut oil - = ++ ++ -
Cresols - - = ++ -
Copper chloride - ++ - ++ -
Copper salts, aqueous 10% - = ++ -
Copper sulphate - + + ++ ++
Adhesive - - - ++ -
Manganese salts 10% - + - -
Magnesium salts, aqueous 10% - ++ ++ ++
Methyl alcohol - + + ++ ++
Methylene chloride - = = = -
Methyl ethyl ketone - = ++ = ++
Methyl pyrolidone - - - = -
Milk - ++ ++ ++ -
Lactic acids - = = = ++
Mineral oils - = ++ ++ -
Mortars, cements, lime - ++ ++ - -
Mono bromo benzol - = - = -
Naphthalene - = ++ = ++ (Kristallin)
Sodium carbonat, aqueous 10% - ++ = ++
Sodium chloride, aqueous 10% + = ++ ++ (max. 20°C)
Sodium cyanide, aqueous 10% - ++ = -
Sodium hydroxyde, aqueous - - - = ++
Sodium nitrate, aqueous 10% ++ ++ ++ ++
Sodium phosphate, aqueous 10% ++ ++ ++ ++
Sodium silicate, aqueous 10% ++ ++ + -
Sodium sulphate, aqueous 10% ++ ++ ++ -
Sodium sulphide, aqueous 10% + ++ + -
Sodium thiosulfate 10% ++ ++ + -
Soda lye 50% ++ + = ++
Nickel chloride, aqueous 10% ++ + ++ -
Nickel salts, aqueous 10% - + ++ -
Nickel sulphate, aqueous 10% + + ++ -
Oleic acid - = ++ ++ -
Oxalic acids, aqueous 10% - + - ++
Ozone - = + ++ -
Palmitic acid - = ++ = -
Paraffin - = ++ ++ -
Vegetable oils - = ++ ++ -
Phenyl ethyl ether - = - ++ -
Phenyl benzol - = - = -
Phosphoric acid, aqueous 10% + = - ++
Propane - = ++ ++ -
Propyl alcohol - - - + -
Mercury - ++ ++ ++ ++
Mercury chloride - - = ++ ++
Flue gas - - - = -
Ricinol - - - ++ -
Hydrochloric acid, aqueous 30% + = = ++
Sulphuric acid - + + = ++
Mustard - - - ++ -
Silver nitrate - + - ++ ++
Soda solution, aqueous 10% ++ ++ - -
Stearic acid - = ++ = -
De-icing salts (solutions) - - ++ - -
Tannin acid 10% ++ - - -
Turpentine oil - = ++ + =
Tetrachloro carbons - = ++ = -
Ink - ++ ++ ++ -
Toluol - = ++ = =
Dichloroethylene - = + = =
Uranium fluoride - - = - -
Urine - ++ ++ - -
Vaseline - - ++ - ++ (max. 60°C)
Vinyl chloride, 80°C - - ++ - -
Wax, 80 °C - - ++ - -
Lees, 80°C - ++ ++ - -
Water, cold - ++ ++ ++ -
Water, up to 80°C - + ++ = -
Water (seawater) - ++ ++ + -
Tartaric acid, aqueous 10% ++ ++ + -
Xylol - = ++ = =
Zinc chloride, aqueous 10% ++ + = ++
Zinc rhodanide 30% - = - -