Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
  • D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
  • D06M13/12—Aldehydes; Ketones
  • D06M13/127—Mono-aldehydes, e.g. formaldehyde; Monoketones
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
  • D06B23/00—Component parts, details, or accessories of apparatus or machines, specially adapted for the treating of textile materials, not restricted to a particular kind of apparatus, provided for in groups D06B1/00 - D06B21/00
  • D06B23/02—Rollers
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
  • D06M11/58—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides
  • D06M11/59—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides with ammonia; with complexes of organic amines with inorganic substances
  • D06M11/62—Complexes of metal oxides or complexes of metal salts with ammonia or with organic amines
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
  • D06M11/58—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides
  • D06M11/63—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides with hydroxylamine or hydrazine
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
  • D06M11/58—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides
  • D06M11/64—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides with nitrogen oxides; with oxyacids of nitrogen or their salts
  • D06M11/65—Salts of oxyacids of nitrogen
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
  • D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen
  • D06M13/325—Amines
  • D06M13/338—Organic hydrazines; Hydrazinium compounds
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M23/00—Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process
• • G—PHYSICS
  • G05—CONTROLLING; REGULATING
  • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
  • G05D3/00—Control of position or direction
  • G05D3/12—Control of position or direction using feedback
  • G05D3/14—Control of position or direction using feedback using an analogue comparing device
  • G05D3/1427—Control of position or direction using feedback using an analogue comparing device with non-linear amplifier chain
• • G—PHYSICS
  • G11—INFORMATION STORAGE
  • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
  • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
  • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
  • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
  • G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
  • G11B5/59605—Circuits
  • G11B5/59622—Gain control; Filters

Definitions

• the metal surface is itself a source of heat, as is a conventional hot plate or hot tube such as are often placed in the draw zone, or whether the surface by yarn carrying rollers driven by external motors and housed in an insulated chest supplied with recirculating hot air, these deposits of organic material tend to form insoluble varnish on the roll surface. As these deposits accumulate, they cause yarn breakage. Consequently, a cleaning routine must be established, with attendant labor costs and interruption of production.
• the improvement of this invention is obtained in a process for heat treating a moving filamentary structure having a coating of a textile finish containing oxidizable organic components, wherein the structure is contacted with a surface at elevated temperatures within the range of about 100C. up to the melting point of the structure in the presence of oxygen.
• the improvement is obtained by using a surface characterized by irregular, rounded surface nodules, which bears within its interstices a catalytic amount of finelydivided platinum, palladium or mixtures thereof, whereby any finish components transferred to the said surface are oxidized to volatile by-products and harmless carbonaceous residues at the filament treatment temperature.
• the surfaces which are to be impregnated with the catalyst must be clean and free from grease; a solution of soluble salt of the catalyst and a reducing agent is applied to a warm surface (e.g., a draw roll), the roll is heated to dry and reduce the catalyst to finely-divided platinum and/or palladium particles; the coating step may be repeated to provide a coating having about 0.03 to about 0.5 gm. of .catalyst per sq. ft. of yarn contacting surface.
• the preferred surface to which the catalyst is applied is the oxide-coated surface invented by England & Spellman in U.S. Pat. No. 3,080,l34 which provides a low friction, abrasion-resistant surface by flame coating a metal yarn-contacting surface of a yarn handling apparatus with a refractory oxide to produce a ceramic coating thereon.
• oxide-coated surface invented by England & Spellman in U.S. Pat. No. 3,080,l34 which provides a low friction, abrasion-resistant surface by flame coating a metal yarn-contacting surface of a yarn handling apparatus with a refractory oxide to produce a ceramic coating thereon.
• the ceramic coating is then lightly polished with abrasive, such as fine emery cloth, to produce a nodular surface having a surface roughness of to 250 root mean square (rms) microinches, as measured with a conventional stylus-type measuring instrument reading directly in rms microinches, the surface being free from sharp peaks.
• abrasive such as fine emery cloth
• the preferred refractory oxides used to provide this coating are Cr O and AI O
• the oxide coating is especially desirable for use in combination with the platinum and/or palladium catalyst because these oxidation catalysts are conventionally used when deposited on a refractory oxide.
• the roughness of the surface permits deposition of catalyst in the interstices, between the nodules, so that it is not abraded away by the running yarn.
• the oxidation catalyst is effective in eliminating the organic residues at temperatures below the melting point of synthetic fibers.
• such catalysts are used at temperatures of over 400C, well above the melting point of all melt-spun fibers.
• platinum and palladium other metals known to catalyze decomposition of organic materials at moderate temperatures may be employed, singly or, in comobination. Typical metals are rhodium and ruthenium; the use of osmium and iridium will generally be uneconomical.
• any water soluble platinum or palladium salt can be used to prepare the treating solution for application to the metal surface.
• the platinum salts should be free from foreign ions which are not removable by volatilization during the reduction treatment, or by washing subsequently.
• Nitrate and nitrite salts of platinum and palladium are especially useful; the chloroplatinates and similar halogen containing compounds may have a corrosive effect which is harmful to metal parts.
• Water soluble reducing agents such as hydrazine hydrate, hydroxylamine and aldehydes such as formaldehyde are useful, although it is quite possible to apply a solution of platinum salt to the metal surface, dry and reduce in an atmosphere of hydrogen.
• the metal surface must be clean and free from oil or finish deposits. lf newly coated with alumina, the surface may have the catalyst applied directly. If the article has been used in yarn production, it should be cleaned to be sure that no oil or finish remains to prevent the treating solution from wetting the surface. A very thorough cleaning method is to boil the article, such as a roll, in synthetic detergent solution, followed by rinsing and heating in a furnace for one half hr. at 450C. Ordinarily, such thorough cleaning is not required, especially when reactivation of catalyst is all that is required.
• yarn quality is meant threadline breaks, broken individual filaments and yarn wraps built up on the rolls. It has been found necessary to clean rolls in commercial use every 3% days; otherwise, yarn quality deteriorates rapidly to an intolerable level after about 4 days. Yarn quality improves immediately after this step is taken. This procedure has now become unnecessary in view of the instant invention.
• catalyst coated rolls have been in commercial use for 6 months or a year, it may be desirable to remove them, reclean by procedures described above and if needed, reimpregnate them with catalyst.
• the catalyst coated hot metal surfaces of the instant invention are useful in any process in which a textile coated with an organic material is heated to elevated temperatures.
• This will include use in heat setting ovens, processes in which fabric is coated and the coating cured, calendaring rolls, hot stretching ovens for tire cords, to name but a few.
• the invention is obviously useful for fiber manufacture, when high temperature treatment is necessary to induce stretching, setting, shrinking or crimping.
• the invention is especially applicable to the production of melt-spun fibers, since the heat treatment is often necessary in their manufacture yet excessive temperatures must be avoided due to their melt sensitivity.
• this group are the polyamides (nylons), the polyesters such as the polymethylene terephthalates and the polyolefins such as polypropylene.
• the filaments are snubbed and drawn over pin 4 in the first drawing stage, pulled by draw rolls 5, 6.
• the filaments then pass in helical wraps around hot pipe 7. where second-stage drawing occurs.
• the filaments then pass into hot chest 10, where they are annealed at constant length while passing in 15 wraps around driven rolls 12, 13.
• Rolls 12 and 13 are 6% inches in diameter and have a face length (in the axial direction), on which the yarn runs, of 9% inches. They have been given a coating of Cr O in accord with the teachings of England et al. in U.S. Pat. No.
• Treating solution A is prepared by dissolving 16.8 gm. platinum diamminedinitrite [Pt(NH (NO- in 500 ml. of dilute ammonium hydroxide (1 part of 28% NH Ol-l reagent solution to two parts water, by vol.), at a temperature of about 70C.
• the platinum compound is converted to the tetrammine complex, a)4( 2)2- Treating solution B is prepared by mixing 22.5 gm. hydrazine hydrate, H N'NH 'H O with 450 ml. water.
• Equal volumes of solutions A and B are mixed and about 20 m1. of the mixture is applied to the yarn contacting surface of each roll while in the temperature range of 70 to C. The coating is carefully applied to the entire surface, coating from top to bottom. The rolls are then heated in an oven for 1 hr. at 200C. After cooling to 7080C., a second application of about 20 ml. of the catalyst solution is applied, followed by oven heating. Each roll has a deposit of about 0.4 gm. platinum. The rolls may be stored for subsequent use. For the present test, they are installed in a hot chest similar to 10 (rolls 12, 13).
• the hot chest is operated at a temperature of 210C.
• Yarn residence time in the hot chest is about 0.3 sec.
• Yarn of excellent quality is produced for a period of 30 days, without any roll cleaning.
• the test is discontinued in order to return to conventional production procedures.
• EXAMPLE ll When the test of Example I is repeated on a full spinning machine basis, starting with rolls newly coated with Cr Oa, producing 1260 denier, 210 filament yarn and using a hot chest temperature of 210C., good quality yarn is produced for 5 months, without interm ediate roll cleaning and essentially without broken filaments due to finish deposits on the rolls. In contrast, normal production of yarn without the catalyst, required roll cleaning twice a week.
• a process for cleaning a movable surface characterized by irregular rounded surface nodules having interstices between the nodules to prevent accumulation of deposits of organic oxidizable material when a moving textile filamentary structure bearing a coating of finish containing oxidizable organic components is contacted by said surface moving at the same speed as said structure at elevated temperatures in the presence of oxygen comprising: applying to said surface a solution of soluble catalyst metal salt and a reducing agent; heating said surface to dry and reduce the metal catalyst salt to a catalytic amount of finelydivided metal particles in the interstices; moving said surface; and contacting said moving surface with a textile filamentary structure of synthetic polymer moving at the same speed as said surface, said structure bearing a coating of finish containing oxidizable organic components, in the presence of oxygen and at a temperature of from about 100C. up to the melting point of the synthetic polymer whereby said oxidizable organic components are oxidized.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Physics & Mathematics (AREA)
• Nonlinear Science (AREA)
• General Physics & Mathematics (AREA)
• Automation & Control Theory (AREA)
• Chemical & Material Sciences (AREA)
• Inorganic Chemistry (AREA)
• Chemical Or Physical Treatment Of Fibers (AREA)
• Catalysts (AREA)
• Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Priority Applications (6)

Applications Claiming Priority (1)

Publications (1)

Family

ID=23012752

Family Applications (1)

Country Status (5)

Cited By (1)

Families Citing this family (3)

Citations (7)

Family Cites Families (1)

• 1972
  • 1972-06-26 US US00266000A patent/US3849177A/en not_active Expired - Lifetime
• 1973
  • 1973-06-21 CA CA174,602A patent/CA1003815A/en not_active Expired
  • 1973-06-25 GB GB3008173A patent/GB1435328A/en not_active Expired
  • 1973-06-26 DE DE2332508A patent/DE2332508A1/de active Pending
  • 1973-08-09 FR FR7329785A patent/FR2198209B1/fr not_active Expired

Patent Citations (7)

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