NYLON 6,6 - polyamide 6.6
Nylon 6,6（,Polyamide 66） specifically, is obtained from hexamethylenediamine and adipic acid via polycondensation and was the first commercially available all synthetic fiber. It has valuable properties- abrasion resistance, wear resistance, hardness, resistance to chemicals and fuels - which make it suitable to a variety of applications.
> PERFORMANCE APPLICATION
As batch process, customers can easily adjust the production referring to quality and quantity in line with the market, This is good for investors to have a better tool to guarantee their business bottom line.
> PROCESS METHODS
Polyamide 6,6 is produced by reacting 1,6-diaminohexane (hexamethylenediamine) with hexanedioic acid (adipic acid) by condensation polymerization.
Process ways:
Batch process
Continuou process
Melt process
> FLEXIBLE BATCH PROCESS
The batch process to produce the nylon polyamide PA6.6, including the following steps:
an AH-Salt solution is either created from the monomers adipic acid and hexamethylenediamine (HMD) or by dissolving solid AH-Salt with water.
This nylon salt solution is pumped to the concentration unit where water is evaporated to increase the salt concentration.
It is then transferred to the autoclave where the polycondensation reaction takes place. Additives can be blended to the concentration unit and polycondensation unit.
In the fourth step, the pressure is gradually lowered with elimination of water and the temperature is increased to 270 ° C., which temperature is maintained during the "cooking" time leading to the final polmer.
Prepared polymer goes to the pelletization unit.
Multiple autoclaves in parallel ensure a continuous solid state polycondensation (SSP) after chip production
> PA6,6 BATCH PROCESS PROCESS FLOW DIAGRAM
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FEATURES
SUNKAIER offers the high-performance autoclave batch process of polycondensation technologies for your polyamide 6.6 production needs as well as for co-polyamides or specialties,
Quick product change
Batch sizes of up to 3.2 t
Batch time of less than 3 hours, i.e. 9 batches per day
Continuous AH salt preparation
Streamlined pre-concentration of AH salt (batch or continuous multi-stage)
Optimized design, leading to minimal residues and contamination (self-cleaning)
Custom-made heating elements and agitators for excellent heat transfer and superior product homogeneity
Melt modifying
Continuous solid-state polymerization (SSP) for higher viscosities available.
Effcient reactor design
Our reactor design with a sophisticated agitator ensures high shear rates, good homogenization, self-cleaning and homogenous heat input. Its versatility allows for production of a wide range of specialty polyamides (PAx.y polyamides).
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UREA TO AMMOUNIA
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LAB REACTOR
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