Polyhexamethylene adipate, commonly known as nylon-66, is a thermoplastic resin typically produced by the condensation of adipic acid and hexamethylene adipate. Insoluble in general solvents, only soluble in meta phenylcresol, etc. The mechanical strength and hardness are very high, and the rigidity is very high. It can be used as engineering plastic, mechanical accessories such as gears and lubricating bearings, replacing non-ferrous metal materials for machine casings, automotive engine blades, etc. It can also be used to produce synthetic fibers.

Polyhexamethylenediamine (nylon-66) is a thermoplastic resin formed by the condensation of adipic acid and hexamethylenediamine, with the following physicochemical properties:

Physical characteristics:

Appearance: White solid or granular

Melting point: 250-260 ° C

Density: Approximately 1.14 g/cm ³

Solubility: Insoluble in general solvents, only soluble in meta phenylcresol, etc

Mechanical properties:

Mechanical strength: tensile strength 6174-8232 N/cm ², bending strength 8575-9604 N/cm ²

Hardness and rigidity: Rockwell hardness 108-118, hot deformation temperature 66-86 ° C

Heat resistance and chemical resistance:

Temperature resistance range: -60 ° C to 110 ° C 5

Corrosion resistance: resistant to dilute inorganic acids, alkalis, and general organic solvents