Its composition has significant effect on polyamide properties. Especially, water absorption is mostly affected. As much as CH2-group exists at each CONH-group, water absorption is that much low and dimension accuracy is that very good. (1% humidity absorption equals to 0,3% length elongation.) Parts which are requested to have dimension accuracy at humid atmosphere, are full only with 1.5% water and preferably are made of polyamide 11.(For comparison this value is 10% for PA6.)

Polyamide is preferred as construction material at the conditions where exact measurements are required and which are mechanically loaded like gear wheel, rod, and bolt. Its mechanical properties are significantly dependent on its humidity quantity and degree of crystallization. It can be used also at higher temperatures because of its crystal structure and high melting point. But, when the temperature is higher than 100°C and when there is oxygen at the environment, damage occurs with oxidation. For this reason, for usage at atmosphere only stabilized ones are chosen.

As a result, POLIPA, is a hard plastic due to its high molecular weight and its structure of crosswise bonds. It is resistant to twisting and corrosion. It has the property of working for a long time under load. But, due to its water absorption (9-10%), it is not recommended at humid environments.

CHARACTERISTICS OF POLIPA®:

• High Mechanical Resistance
• Hardness and stroke absorption characteristic
• Electrical Insulation
• Sliding and high corrosion resistance
• Resistance to chemicals

• Items which are exposed to loads with strokes
• Gears
• Bobbins
• Vibration Sucking Elements
• Engineering and maintenance applications with general purpose.

Information provided by Polimersan Polimer Kimya San.Tic.Ltd.Sti.