http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-609796-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_aa58c65bc8e0ced226cb044f4b08fbce http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_73ee0bacab5a7576a6a3244747f6ea99 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d993c6813ab25c70fd1fa612f2bfb429 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-6856 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D01F6-62 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-685 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D01F6-62 |
| filingDate | 1946-03-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1948-10-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-609796-A |
| titleOfInvention | Improvements in the production of artificial filaments |
| abstract | Artificial filaments are obtained by extruding a water-free molten linear poly-(glycol-terephthalic acid) ester through an orifice having a diameter of 0.001 to 0.09 inches, and rapidly cooling the extruded filament, preferably by quenching in an inert liquid such as water. The temperature of extrusion is preferably not more than 50 DEG C. higher than the melting point of the polyester. The ester may be made by heating one or more glycols of the series HO(CH2)nOH, where n is an integer greater than 1 but not greater than 10, with terephthalic acid or an ester-forming derivative thereof. The glycol used may be ethylene, trimethylene, tetramethylene, hexamethylene, or decamethylene glycol. An ester, acid halide, or ammonium or amine salt of terephthalic acid may be used instead of the free acid. The filaments are preferably subjected to drawing when in the solid state, and preferably they are subjected to a heat setting treatment, at a temperature higher than that of the drawing operation, but preferably at least 30 DEG C. below the melting point of the polymer, while they are held under tension. If a filament of high elongation is required, a restricted amount of shrinking may be allowed during the heat setting. The heat treatment improves the resiliency of the filaments. In an example, a highly polymerized polyethylene terephthalate (intrinsic viscosity 0.78 in 1 per cent solution in 60/40 phenol-tetra-chloroethane at 30 DEG C.) is heated in the absence of oxygen at 285 DEG C. It is extruded in molten condition through a single hole orifice into water to form a filament of 0.02 inches in diameter. The filament is drawn to five times its length in a water bath at 60 DEG C. The filament is subjected to a heat setting treatment in an oil bath at 150 DEG C. The filaments obtained may be used as artificial bristles for tooth-brushes, nail-brushes, shaving-brushes, clothes - brushes, scrubbing - brushes, yard brooms, or brushes for industrial purposes. The filaments may be produced in tapered form, e.g. by varying the rate of draw-off. Such tapered filaments may be used as bristles for paint-brushes. The filaments may be used in making screens for sifting powders or filtering liquids, for excluding insects, or for lining shoes to be worn in the tropics. The filaments may be formed into knitted or woven fabrics, including carpet backing material. They may be associated with filaments or fibres of cotton, wool, viscose, or cuprammonium regenerated cellulose. They may be used in making fishing nets, ropes, sewing thread, musical instrument strings, artificial rattan for chair seats, sutures, artificial hair, and artificial gut. Specifications 533,306, 533,307, 535,263, 536,379, 536,380, 578,238 and 603,840 are referred to. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0906973-A3 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0906973-A2 |
| priorityDate | 1946-03-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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