Method for production of non-woven surfaces
A technology of thermoplastic polymers and compositions, applied in the direction of non-woven fabrics, textiles and papermaking, conductive/antistatic filament manufacturing, etc., to achieve the effect of improving surface properties
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Embodiment 1
[0129] Preparation of polyamide PA 6,6: In a polymerization reactor, 3149 g of dry nylon salt (a salt obtained by a stoichiometric reaction between one molecule of adipic acid and one molecule of hexamethylene diamine) was added to contain 0.21 g passivated copper acetate monohydrate powder, 7.56g 99.5wt% pure potassium bromide powder and 3.96g 98wt% pure phenylphosphonic acid in 2941g water.
[0130] The reaction mixture was heated until 112°C; the autogenous pressure was then adjusted to 1.2 bar absolute by water distillation in the concentration step until a temperature of 120°C was obtained.
[0131] The reaction mixture was then heated to 215°C without water distillation. At this temperature, its own pressure reaches an absolute value of 17.5 bar, and is adjusted to this value by the water distillation of the pressure distillation step until a temperature of 230°C is obtained. When the temperature of the reaction mixture in this pressure distillation step reached 220°C, 13.6 ...
Embodiment 2
[0136] Using the procedure of Example 1, by additionally adding 3.57g of pure adipic acid powder to the initial mixture of nylon salt, and adding 77.59g of 70wt% hydrous Jeffamine when the temperature of the reaction mixture reached 260°C during the decompression step ED 2003 or XTJ-502 solution to prepare the conductive copolyamide according to the first embodiment of the present invention. In addition, the duration of the post-treatment step is 45 minutes.
[0137] The viscosity value of the obtained copolymer measured according to the method described in Example 1 was 139 ml / g. The amine and acid end groups were determined to be 43 and 77 meq / kg by potentiometric method in trifluoroethanol / chloroform solvent medium.
[0138] The obtained copolymer B contained 2 wt% of the repeating unit corresponding to the general formula III, that is, the repeating unit corresponding to the Jeffamine monomer.
Embodiment 3
[0140] The same preparation process as in Example 2 was repeated, in this case 8.93g of pure adipic acid powder and 193.98g of 20wt% aqueous Jeffamine ED 2003 or XTJ-502 solution were introduced.
[0141] The viscosity value of the polymer is 125 ml / g. The amine and acid end groups were determined to be 50 and 85 meq / kg by potentiometry in a trifluoroethanol / chloroform solvent medium.
[0142] The obtained copolymer C contained 5 wt% of repeating units corresponding to the general formula III, ie, Jeffamine monomer.
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