Material Handling

Material handling technology has always been one of the most challenging industry. Reduce maintenance costs, friction and wear.

All these points have been reached with our plastic knowledge.

COMPONENTS FOR

AUTOMATED VERTICAL WAREHOUSE
CONVEYORS

MACHINABLE PLASTICS FOR AGRICOLTURE

PA6 details.

Polyamide 6, better known as PA6, is an extruded polyamide, it offers a high resistance to abrasion, impact, damping and a good combination of mechanical stability.

PA6 can easily substitute bronze, aluminium and other non-ferrous metals, as it has various advantages. Weight, for example. It has a specific gravity of 1,15 g/cm3 and bronze has 8,8 g/gm3, making the comparative volume price very attractive.

Extruded Polyamide 6 also reduces lubrifications requirements thanks to its sliding properties and wear resistance even when running dry. It is also non-abrasive when in contact with other surfaces, which means a longer life for all bearing elements.

Working in a normal weather condition (20°C / 65% moisture), PA6 could absorb up to 3-4 % of its weight. Submerged in water, up to 8-10%. These situations increase ductility, toughness and the excellent shock and vibration resistance, while stiffness, hardness, yield stress and mechanical, electrical and dimensional properties in general are influenced.

In general, Polyamide 6 has a brilliant resistance to atmospheric agents and UV rays.

About its chemical resistance, PA6 is suitable for the contact with hydrocarbons, oils, fats, esters, ketones and others. Its behaviour is good also in contact with organic and inorganic bases up to medium concentrations. PA6 is largely resistant to trichlorethylene, carbon tetrachloride, methylene chloride and freon. Please pay attention when in contact with chloroform, ethanol and methanol, because they could cause swelling similar to water. Alcohols are indifferent in most cases. Concentrated ants, acetic acids, phenols, cresols, glycols and benzyl alcohol have loosening effects, especially at high temperatures.

Our Polyamide 6 is FDA approved and can also be certified according EC 1935/2004, EC 2023/2006 and EU 10/2011.

According the incredible improvement of plastic science, Polyamide 6 has been improved a lot in last few years, thanks to a different type of additives, such as:

  • Molybdenum Disulphide. Improved sliding properties at slightly higher compressive strength; UV radiation resistant by its black colour; improved wear resistance and lower surface friction.
  • Glass Fibre. Improved mechanical resistance; higher abrasion.
  • Modified with metal detector filler. In blue colour, PA6 can also be detected in case of needs.

 

PA6 most famous brand name:
  • Nylon;
  • Zellamid® 202;
  • Sustamid® 6;
  • Ertalon® 6SA;
  • Lamigamid® 100;
  • Tecamid® 6.
PA6 in few words.

Special properties:

  • Good toughness;
  • High wear resistance;
  • High thermal stability;
  • Very good strength and hardness;
  • High mechanical damping characteristics;
  • Good noise and vibration absorption;
  • Good sliding properties;
  • Good chemical resistance.

Used in:

  • Pulp and paper Industry;
  • Offshore and marine;
  • General Machine Building;
  • Food Industry;
  • Material Handling;
  • Electronics;
  • Construction;
  • Mining.

Applications:

  • Sliding parts;
  • Wear components;
  • Ball bearing races;
  • Friction bearings;
  • Pulleys;
  • Bogies;
  • Rope pulleys;
  • Sheaves;
  • Rollers;
  • Wheels;
  • Gears.

PA6G details.

PA6G is a beige coloured, firm, homogeneous, stress-relieved CAST POLYAMIDE, with a high degree of crystallinity.

Production method

While PA6 is obtained with an extrusion process, PA6G is obtained from a monomer moulding process, in which semi-finished products (plates, tubes, rods of finished parts) are created by a controlled reaction. Caprolactam is melted separately with activator and catalyst, then mixed and immediately put into a heated mould, that gives shape to semi-finished products. This process is called casting reaction (Polyamide 6 Guss which, translate from German means Polyamide 6 Cast), which could be divided into:

  • Centrifugal casting, the shape in obtained by rotating movements (ideal method for pulleys);
  • Standing casting, standard method where the substances are casting and standing into a mould.

Thank to this production method, a significant improvement is obtained, which reflects in a better performance of the material and also a better physical properties. It is also an appropriate method to produce larger parts.

Characteristics

PA6G offers a high abrasion and wear resistance at low medium speeds compared to cast iron, steel or bronze, especially under harsh conditions, such as contact with sand or dust.

Its visco-elasticity complies with a various environmental requirements, in fact it can easily prolong machine lifetime and it is perfectly suitable for parts such as rollers, gear wheels, etc.

With a specific weight of 1,15 g/cm3, PA6G only weight approx.13% of the same volume of bronze, 15% of steel and 43% of aluminium, which means less centrifugal force and imbalance in rotating parts.

Sliding properties

Polyamide 6 Cast offers excellent sliding properties, even when running dry, which characterise it as a friction bearing material for machine parts that are subject to a lot wear. Because of the low coefficient of friction, lubrification is often unnecessary or only an initial lubrification is required when the parts are installed.

Temperature, moisture and dimensional stability

Unfortunately PA6G is influenced by temperature and moisture. When temperatures increase or water is absorbed, tensile and compressive strength are reduced, modulus of elasticity and hardness are reduced, while impact resistance and expansion increase.

Dimensional stability is also affected by these circumstances. However, the high crystallinity of PA6G reduces moisture absorption considerably. Water is only absorbed very slowly. The rate of absorption reduces progressively with the depth of penetration.

Saturation level in standard climate (23°C/50%RH) depending on type: 1,5 – 2%.

Linear deformation due to moisture absorption: approx. 0,15 – 0,20% per 1% water absorbed.

Linear deformation due to temperature changes: approx. 0,1% per 10°C temperature change.

Chemical Resistance

PA6G offers also a good chemical resistance against weak acids and alkalis as well as all conventional organic and inorganic bases. It is resistant to hydrocarbons (such as Petrol), oils, fats, esters, ketones and ether. It resists to trichlorethylene, carbon tetrachloride, methylene chloride, Fringe and Freon too. It is suitable to work submerged into sea water, but like water, and also with chloroform, ethanol and methanol, a little swelling could be caused. Alcohols are largely indifferent and it can also resist to mineral acids in low concentrations. There may be slight discoloration on the acetic acid, phenols, cresols, glycols and benzyl alcohol, especially at high temperatures.

Food compliance

PA6G complies with FDA, EC1935/2004, EC2023/2006 and EU 10/2011.

Additives

Thanks to a various type of additives, PA6G can be improved, such as:

  • +MOS2, for a higher crystallinity;
  • +OIL, for better sliding properties;
  • +SL, for almost no stick slip effect;
  • -HS, for a higher stability.

 

PA6G most famous brand name:
  • Linnotam;
  • Zellamid® 1100;
  • Sustamid® 6G;
  • Ertalon® 6PLA;
  • Lamigamid® 310;
  • Tecast® T.
PA6G in few words.

Special properties:

  • Excellent mechanical properties;
  • Good toughness;
  • Good hardness and stiffness;
  • Very good sliding properties;
  • Very high abrasion and wear resistance;
  • high mechanical strength coupled with high impact strength.

Used in:

  • Transport and conveyor;
  • Material handling;
  • Construction;
  • Automotive and Garage equipment;
  • Offshore;
  • Food Industry;
  • Steel Industry;
  • Waste Management.

Applications:

  • Sliding parts;
  • Wear components;
  • Ball bearing races;
  • Friction bearings;
  • Pulleys;
  • Bogies;
  • Rope pulleys;
  • Sheaves;
  • Rollers;
  • Wheels;
  • Gears.

Polyvinylidenefluoride (PVDF) is a highly non-reactive thermoplastic fluoropolymer produced by the polymerization of vinylidene difluoride. PVDF is a specialty plastic used in applications requiring the highest purity, as well as resistance to solvents, acids and hydrocarbons. Compared to other fluoropolymers, like polytetrafluoroethylene (Teflon), PVDF has a low density (1.78 g/cm3).

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MACHINED PARTS FOR MATERIAL HANDLING INDUSTRIES