US2029985A - Method of bleaching - Google Patents

Method of bleaching Download PDF

Info

Publication number
US2029985A
US2029985A US614522A US61452232A US2029985A US 2029985 A US2029985 A US 2029985A US 614522 A US614522 A US 614522A US 61452232 A US61452232 A US 61452232A US 2029985 A US2029985 A US 2029985A
Authority
US
United States
Prior art keywords
goods
bleaching
solution
reaction chamber
time
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US614522A
Inventor
Clark James Andrew
Smolens Harry Gregory
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BUFFALO ELECTRO CHEM CO
BUFFALO ELECTRO-CHEMICAL COMPANY Inc
Original Assignee
BUFFALO ELECTRO CHEM CO
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BUFFALO ELECTRO CHEM CO filed Critical BUFFALO ELECTRO CHEM CO
Priority to US614522A priority Critical patent/US2029985A/en
Application granted granted Critical
Publication of US2029985A publication Critical patent/US2029985A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
    • D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
    • D06L4/10—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen

Definitions

  • This invention relates to a method of bleaching textile bers and more particularly to a method for continuously bleaching textile iibers with solutions of bleaching compounds and to an apparatus.
  • bleaching textile fibers heretofore particularly those fibers containing relatively large quantities of cellulosic material
  • the ber may be bleached either in the raw state, as for instance loose cotton, as yarn in the form of cotton, hanks, or warp, or in the piece.
  • bleaching of textile fibers, such as cotton includes three main operations; namely, boiling, chemical treatment, and souring. The use to which the liber is to be employed regulates the extent to which these operations are carried out.
  • Bleaching of yarn or cloth in width has been carried out heretofore in what is generally called a kier in which the goods have been piled or draped, and wherein the goods are subjected to the action of bleaching liquor which is permitted to shower over the goods, fall therethrough and be subsequently recirculated to shower over the goods for a period of time on the order of about two hours.
  • Excess bleaching liquor is removed by thoroughly rinsing the goods with Water and dipping in a souring bath which comprises a diluted acid.
  • the yarn is ready for use after it has been subjected to a rinsing operation subsequent to the souring to remove the acid Which would otherwise cause the yarn to become tender and decrease the strength of the resulting bleached fabric.
  • the goods are passed continuously through the bleaching solution at such rate as will permit the saturation or padding of the goods with the bleaching solution.
  • This rate will, of course, depend upon the form in which the goods are passed through the solution, whether in rope form or in open width, and upon the previous history of the goods, the particular kind of fiber, etc.; the goods are thereafter passed through a device which eliminates substantially all of the bleaching solution carried by the cloth, yet leave the cloth in a moist condition.
  • the goods are passed continuously through a reaction chamber where the bleaching takes place.
  • the duration of the time of passage of the goods through the reaction chamber is sufficiently long to permit the desired bleaching action of the bleaching solution upon the goods and to this end, the goods are passed through shutes or other suitable devices continuously and for a time sufcient to eiect the desired degree of bleaching.
  • any evaporation of liquid contained in the bleaching solution effectively carries away any layer of nonactive or spent bleaching agent in contact with the goods and permits the formation of a new and chenilcally active layer about the goods which aids in the proper bleaching thereof.
  • the goods After passing through the reaction chamber the goods are suitably rinsed to remove residual chemicals and soluble impurities.
  • the duration of .fthe bleaching treatment will vary with the type of goods and the extent to which the goods are to be bleached, in any case, this time will be materially shorter than that required to bleach the same goods by the intermittent method such as 4 that using an injector kier wherein several hours are consumed in loading or unloading the kier and in circulating the bleaching solutions thereover.
  • the same bleached condition of the goods may be obtained in a period of time ranging from about ten to about thirty minutes, depending upon the strength of the bleaching solution and the temperature to which the goods are subjected when working in accordance with the present invention; both higher temperatures and higher concentrations of bleaching agents tend to reduce the time necessary to produce a predetermined bleach in the goods.
  • the goods are caused to pass from the bleaching or reaction chamber into a rinsing bath to eliminate the last traces of the bleaching solution and to eliminate soluble materials in the fiber as mentioned above.
  • the rinsing time is materially reduced over the rinsing time required when the goods are bleached in a kier; in a kier bleach sediment and impurities from the bath collect and accumulate upon the fabric due to the fact that the solution is recirculated through the kier, and this sediment is, in most cases, washed off only with difculty. Since the cause of the sedimentation, recirculation of the solution, has been eliminated, concentration of the sediment upon any given portion of the fiber or goods does not occur in our process. Further, whatever sediment may collect upon the goods from the bleaching solution is not matted in the goods as is often the case of sedimentation from recirculation processes, but is readily removed and detached from the goods.
  • the process may be carried out in any suitable form of apparatus although we have found a reaction chamber of the type illustrated in the figure to be suitable for the purpose.
  • the reaction chamber i@ is provided with water seals l I in which the side edges of the top of the reaction chamber are immersed in order to complete the water seal.
  • the water seal is normally in the form of a trough in which the bleaching solution is stored and through which the goods are passed prior to their entrance into the reaction chamber.
  • the reaction chamber is constructed of suitable materials and of a suitable type whereby temperatures either above or below that of steam at atmospheric pressure may be maintained.
  • the chamber IE) is therefore provided with suitable inlets i2 through which live steam is injected into the chamber at a given pressure in order to maintain a predetermined temperature within the chamber,
  • the chamber is also provided with a Valved discharge passage through which any condensate may be eliminated and removed from the reaction chamber, as at i3.
  • a J shute is provided within the reaction chamber and, in the form shown, is formed from imperforate material, although the shute may be provided with perforations or slots to permit of better circulation oi' the heated atmosphere within the chamber. rFhe shute is also provided with a perforated bottom to permit of the removal of any liquid which might drip upon the shute and run down to the bottom portion thereof, as at Hi.
  • the goods 9 pass through rolls i5 which are sunciently long to receive the entire width of the goods in the open condition, are passed downwardly through a bleaching solution i6 contained within the water seal H surrounding a portion of the reaction chamber, passed upwardly therethrough and between squeeze rolls il of suitable type and composition whereby excess bleaching liquor is eliminated from the goods and drips or passes in the main body of the solution in the water seal.
  • the moist goods pass from the squeeze rolls il to the plaiter-down I8 and is there caused to pass down the J shute in regular layers whereby the goods are retained for a greater length of time in contact with the heated atmosphere so that residual quantity of bleaching liquor retained upon the goods may be evaporated or heated to an elevated temperature and thereby act more vigorously upon matters in the goods for the production of a bleached white fabric.
  • and the bleaching solution I6 may be circulated in the seal Il in any desired fashion, to continuously provide fresh solution for the action of the goods or may be permitted to remain in the seal until tests thereof show either an undue accumulation of foreign matter in the rinse or a change in the composition or amount of the bleach indicating a removal of these solutions.
  • temperatures at or above 212 F. obtainable from the use of steam at or above atmospheric pressure, are suitable for bleaching in a minimum time.
  • the bleaching solutions employed in the prescnt improved method comprise solutions of hydrogen peroxide of any suitable strength which are maintained in an alkaline condition by the use of suitable agents such as sodium silicate, soda ash, caustic soda or alkaline phosphate of soda or potash and the like, that is, alkaline agents which facilitate the decomposition of the peroxide and consequent bleaching of the ber.
  • suitable agents such as sodium silicate, soda ash, caustic soda or alkaline phosphate of soda or potash and the like, that is, alkaline agents which facilitate the decomposition of the peroxide and consequent bleaching of the ber.
  • This alkaline peroxide solution may, if desired, be produced from water solutions of peroxide of metals other than hydrogen.
  • goods refers to yarn as well as cloth and textiles in form of hanks or raw fibers in untwisted and unspun state.
  • the method of bleaching cotton goods which comprises wetting the goods with a quantity of a solution of hydrogen peroxide in water suflicient to moisten the goods, and thereafter subjecting the goods to a temperature above the boiling point of the solution in an atmosphere containing steam for a period of time suicient to produce the desired bleaching effect in the goods.
  • the method of bleaching cotton goods which comprises wetting the goods with an aqueous solution of hydrogen peroxide, eliminating the major portion of the solution from the goods but permitting the retention of suilicient quantity of the solution to moisten the bers of the goods, and thereafter subjecting the goods to a temperature above the boiling point of the solution in an atmosphere containing steam for a period of time suicient to produce the desired bleaching effect in the goods.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)

Description

fvmch an Hmm? GR 2,029,985 CUN 0F TEXTILES & Fgg *E L Feb. 4, 1936. J. A. CLARK ET AL 2,029,985
METHOD GF BLEACHING Filed May 5l, 1932 l WIW II www *I INVENTORS JwzzeJAmmf/zf BY Ham/mamy 5x20/225 ATTORNEYS "HUN 0F TEXTILES & FIBtQL-Q,
Patented Feb. 4, 1936 UNITED STATES PATENT OFFICE METHOD OF BLEACHING Inc., Tonawanda, N. Y.
Application May 31, 1932, Serial No. 614,522
2 Claims.
This invention relates to a method of bleaching textile bers and more particularly to a method for continuously bleaching textile iibers with solutions of bleaching compounds and to an apparatus.
In bleaching textile fibers heretofore, particularly those fibers containing relatively large quantities of cellulosic material, it has been found that the ber may be bleached either in the raw state, as for instance loose cotton, as yarn in the form of cotton, hanks, or warp, or in the piece. In general, bleaching of textile fibers, such as cotton, includes three main operations; namely, boiling, chemical treatment, and souring. The use to which the liber is to be employed regulates the extent to which these operations are carried out. Bleaching of yarn or cloth in width has been carried out heretofore in what is generally called a kier in which the goods have been piled or draped, and wherein the goods are subjected to the action of bleaching liquor which is permitted to shower over the goods, fall therethrough and be subsequently recirculated to shower over the goods for a period of time on the order of about two hours. Excess bleaching liquor is removed by thoroughly rinsing the goods with Water and dipping in a souring bath which comprises a diluted acid. The yarn is ready for use after it has been subjected to a rinsing operation subsequent to the souring to remove the acid Which would otherwise cause the yarn to become tender and decrease the strength of the resulting bleached fabric.
We have found that we are able to bleach textile fibers, either in the raw state, as yarn, and
especially when in the form of cloth or goods, in
a much shorter period of tir1e`tlf has been found necessary heretofore. In the broad aspect of the invention, we subject the goods either in Y rope form or in the open width, to the action of the bleaching solution whereby the goods become impregnated or padded with the bleaching solution, and thereafter eliminate substantially all of the bleaching solution from the goods, subjecting the moist goods to a predetermined temperature for a time suicient to induce the degree of bleaching desired or until all of the bleaching material retained in the goods has been decomposed.
Thus, the goods are passed continuously through the bleaching solution at such rate as will permit the saturation or padding of the goods with the bleaching solution. This rate will, of course, depend upon the form in which the goods are passed through the solution, whether in rope form or in open width, and upon the previous history of the goods, the particular kind of fiber, etc.; the goods are thereafter passed through a device which eliminates substantially all of the bleaching solution carried by the cloth, yet leave the cloth in a moist condition.
After the greater portion of the bleaching solution has been removed from the goods, the goods are passed continuously through a reaction chamber where the bleaching takes place. The duration of the time of passage of the goods through the reaction chamber is sufficiently long to permit the desired bleaching action of the bleaching solution upon the goods and to this end, the goods are passed through shutes or other suitable devices continuously and for a time sufcient to eiect the desired degree of bleaching.
We further propose to accelerate the bleaching action by maintaining a predetermined temperature within the reaction chamber, as for instance by means of controlled steam pressure. This steam pressure may be either above, below or at atmospheric pressure, and a temperature corresponding to such steam pressure will obtain in the reaction chamber.
By eliminating substantially all of the excess moisture and bleaching solution from the goods We are able to shorten the time of treatment considerably since the amount of heat necessary to raise the temperature of the bleaching solution on the goods is materially decreased due to the fact that only a small quantity of the solution now remains in the fiber or in the interstices between the fibers. Further, any evaporation of liquid contained in the bleaching solution effectively carries away any layer of nonactive or spent bleaching agent in contact with the goods and permits the formation of a new and chenilcally active layer about the goods which aids in the proper bleaching thereof. After passing through the reaction chamber the goods are suitably rinsed to remove residual chemicals and soluble impurities.
As mentioned herein, the duration of .fthe bleaching treatment will vary with the type of goods and the extent to which the goods are to be bleached, in any case, this time will be materially shorter than that required to bleach the same goods by the intermittent method such as 4 that using an injector kier wherein several hours are consumed in loading or unloading the kier and in circulating the bleaching solutions thereover. Whereas several hours are required to obtain a given desired bleach by use of recirculation in a kier, the same bleached condition of the goods may be obtained in a period of time ranging from about ten to about thirty minutes, depending upon the strength of the bleaching solution and the temperature to which the goods are subjected when working in accordance with the present invention; both higher temperatures and higher concentrations of bleaching agents tend to reduce the time necessary to produce a predetermined bleach in the goods.
The goods are caused to pass from the bleaching or reaction chamber into a rinsing bath to eliminate the last traces of the bleaching solution and to eliminate soluble materials in the fiber as mentioned above. In this process the rinsing time is materially reduced over the rinsing time required when the goods are bleached in a kier; in a kier bleach sediment and impurities from the bath collect and accumulate upon the fabric due to the fact that the solution is recirculated through the kier, and this sediment is, in most cases, washed off only with difculty. Since the cause of the sedimentation, recirculation of the solution, has been eliminated, concentration of the sediment upon any given portion of the fiber or goods does not occur in our process. Further, whatever sediment may collect upon the goods from the bleaching solution is not matted in the goods as is often the case of sedimentation from recirculation processes, but is readily removed and detached from the goods.
The process may be carried out in any suitable form of apparatus although we have found a reaction chamber of the type illustrated in the figure to be suitable for the purpose.
The reaction chamber i@ is provided with water seals l I in which the side edges of the top of the reaction chamber are immersed in order to complete the water seal. The water seal is normally in the form of a trough in which the bleaching solution is stored and through which the goods are passed prior to their entrance into the reaction chamber.
The reaction chamber is constructed of suitable materials and of a suitable type whereby temperatures either above or below that of steam at atmospheric pressure may be maintained. The chamber IE) is therefore provided with suitable inlets i2 through which live steam is injected into the chamber at a given pressure in order to maintain a predetermined temperature within the chamber, The chamber is also provided with a Valved discharge passage through which any condensate may be eliminated and removed from the reaction chamber, as at i3.
A J shute is provided Within the reaction chamber and, in the form shown, is formed from imperforate material, although the shute may be provided with perforations or slots to permit of better circulation oi' the heated atmosphere within the chamber. rFhe shute is also provided with a perforated bottom to permit of the removal of any liquid which might drip upon the shute and run down to the bottom portion thereof, as at Hi.
In the operation of the method and apparatus upon goods on open width, the goods 9 pass through rolls i5 which are sunciently long to receive the entire width of the goods in the open condition, are passed downwardly through a bleaching solution i6 contained within the water seal H surrounding a portion of the reaction chamber, passed upwardly therethrough and between squeeze rolls il of suitable type and composition whereby excess bleaching liquor is eliminated from the goods and drips or passes in the main body of the solution in the water seal. The moist goods pass from the squeeze rolls il to the plaiter-down I8 and is there caused to pass down the J shute in regular layers whereby the goods are retained for a greater length of time in contact with the heated atmosphere so that residual quantity of bleaching liquor retained upon the goods may be evaporated or heated to an elevated temperature and thereby act more vigorously upon matters in the goods for the production of a bleached white fabric.
From the J shute the goods pass under the idler roll i9 placed adjacent the bottom of the shute upwardly over the roll 20 and then pass through a rinse 2l of desirable type, as for instance water, placed in another portion of the water seal Il and separate from the bleaching solution I6 in another portion of the seal. Excess rinse solution is squeezed from the goods by the use of squeeze rolls 22.
Both the rinse solution 2| and the bleaching solution I6 may be circulated in the seal Il in any desired fashion, to continuously provide fresh solution for the action of the goods or may be permitted to remain in the seal until tests thereof show either an undue accumulation of foreign matter in the rinse or a change in the composition or amount of the bleach indicating a removal of these solutions.
The temperatures recommended depend upon the history of the goods to be bleached, but for most purposes temperatures at or above 212 F., obtainable from the use of steam at or above atmospheric pressure, are suitable for bleaching in a minimum time. Thus, we have obtained good bleaching of cotton cloth at 4 ounces of steam pressure in l5 minutes, the pressure being regis/"tailed upon, a suitable gauge 25"'at'tasl`id to chamber lil. www' The bleaching solutions employed in the prescnt improved method comprise solutions of hydrogen peroxide of any suitable strength which are maintained in an alkaline condition by the use of suitable agents such as sodium silicate, soda ash, caustic soda or alkaline phosphate of soda or potash and the like, that is, alkaline agents which facilitate the decomposition of the peroxide and consequent bleaching of the ber. This alkaline peroxide solution may, if desired, be produced from water solutions of peroxide of metals other than hydrogen.
The term goods as used herein refers to yarn as well as cloth and textiles in form of hanks or raw fibers in untwisted and unspun state.
We claim:
1. The method of bleaching cotton goods which comprises wetting the goods with a quantity of a solution of hydrogen peroxide in water suflicient to moisten the goods, and thereafter subjecting the goods to a temperature above the boiling point of the solution in an atmosphere containing steam for a period of time suicient to produce the desired bleaching effect in the goods.
2. The method of bleaching cotton goods which comprises wetting the goods with an aqueous solution of hydrogen peroxide, eliminating the major portion of the solution from the goods but permitting the retention of suilicient quantity of the solution to moisten the bers of the goods, and thereafter subjecting the goods to a temperature above the boiling point of the solution in an atmosphere containing steam for a period of time suicient to produce the desired bleaching effect in the goods.
JAMES ANDREW CLARK. HARRY GREGORY SMOLENS.
US614522A 1932-05-31 1932-05-31 Method of bleaching Expired - Lifetime US2029985A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US614522A US2029985A (en) 1932-05-31 1932-05-31 Method of bleaching

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US614522A US2029985A (en) 1932-05-31 1932-05-31 Method of bleaching

Publications (1)

Publication Number Publication Date
US2029985A true US2029985A (en) 1936-02-04

Family

ID=24461611

Family Applications (1)

Application Number Title Priority Date Filing Date
US614522A Expired - Lifetime US2029985A (en) 1932-05-31 1932-05-31 Method of bleaching

Country Status (1)

Country Link
US (1) US2029985A (en)

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2469249A (en) * 1945-11-27 1949-05-03 Olin Mathieson Process of scouring cellulosic textiles using steam
US2499987A (en) * 1945-12-18 1950-03-07 Harris Res Lab Process for imparting shrink resistance to wool
US2521340A (en) * 1945-05-16 1950-09-05 Olin Mathieson Bleaching of cellulosic textiles
US2529991A (en) * 1947-06-18 1950-11-14 Rodney Hunt Machine Co Plaiter
US2792700A (en) * 1952-12-08 1957-05-21 Dominion Textile Co Ltd Apparatus for the continuous treatment of textile materials
US2803517A (en) * 1953-01-20 1957-08-20 Ici Ltd Process of bleaching and desizing cotton gray goods with organic solvent degreasing and dewaxing and peroxygen bleaching
US2839353A (en) * 1956-04-26 1958-06-17 Du Pont High speed peroxide textile bleaching process
US2868615A (en) * 1955-06-28 1959-01-13 Du Pont Continuous scouring and bleaching of gray goods
DE1049222B (en) * 1954-11-19 1959-01-22 Fmc Corp Process for bleaching wood pulp
US2905522A (en) * 1954-04-22 1959-09-22 Victor T Fahringer Method and apparatus for treating web and/or strand material
US2920011A (en) * 1955-03-18 1960-01-05 Waldorf Paper Prod Co Elevated temperature and pressure two stage hypochlorite peroxide pulp bleaching process
US2946476A (en) * 1955-08-29 1960-07-26 Ici Ltd Sealing device
US2960382A (en) * 1955-05-13 1960-11-15 Armstrong Cork Co Method of bleaching linoleum using hydrogen peroxide bleach
US2986912A (en) * 1958-04-14 1961-06-06 Chemstrand Corp Textile treating apparatus
US3005250A (en) * 1955-03-07 1961-10-24 Charles G Hatay Machine for fabric finishing to reduce shrinkage and improve the feel and hand of cloth
US3027740A (en) * 1960-04-29 1962-04-03 American Cyanamid Co Tow-processing apparatus
US3037369A (en) * 1960-06-23 1962-06-05 American Cyanamid Co Apparatus for the fluid treatment of strands of elongated material
US3106460A (en) * 1959-05-01 1963-10-08 Calico Printers Ass Ltd Process for removing organic solvent from wet material
US3150918A (en) * 1962-03-29 1964-09-29 Pittsburgh Plate Glass Co Method of bleaching cotton piece goods
US3343187A (en) * 1953-09-16 1967-09-26 Kleinewefers Soehne J Method of controlling the steam in treatment chambers for textile materials
US3457029A (en) * 1967-08-12 1969-07-22 Ilma Ind Lavorazioni Metalli A Apparatus and process for continuously steaming textile fiber materials
US3730678A (en) * 1967-09-06 1973-05-01 Burlington Industries Inc Process for treating textile materials
US4883557A (en) * 1987-08-26 1989-11-28 Tokyo Gas Co., Ltd. Method for lining pipe lines with a pressurized gas
US5259212A (en) * 1990-12-14 1993-11-09 Liquid Carbonic Corporation Cryogenic freezer with a liquid trap
US5529625A (en) * 1993-04-01 1996-06-25 General Electric Company Coating apparatus and gas seal
US5714043A (en) * 1995-09-14 1998-02-03 Tire Recycling Technologies Corp. Liquid seal bulk feeder for destructive distillation
US7743912B2 (en) 2005-08-05 2010-06-29 Finley Dana J Liquid seal bulk feeder for destructive distillation of lightweight materials

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2521340A (en) * 1945-05-16 1950-09-05 Olin Mathieson Bleaching of cellulosic textiles
US2469249A (en) * 1945-11-27 1949-05-03 Olin Mathieson Process of scouring cellulosic textiles using steam
US2499987A (en) * 1945-12-18 1950-03-07 Harris Res Lab Process for imparting shrink resistance to wool
US2529991A (en) * 1947-06-18 1950-11-14 Rodney Hunt Machine Co Plaiter
US2792700A (en) * 1952-12-08 1957-05-21 Dominion Textile Co Ltd Apparatus for the continuous treatment of textile materials
US2803517A (en) * 1953-01-20 1957-08-20 Ici Ltd Process of bleaching and desizing cotton gray goods with organic solvent degreasing and dewaxing and peroxygen bleaching
US3343187A (en) * 1953-09-16 1967-09-26 Kleinewefers Soehne J Method of controlling the steam in treatment chambers for textile materials
US2905522A (en) * 1954-04-22 1959-09-22 Victor T Fahringer Method and apparatus for treating web and/or strand material
DE1049222B (en) * 1954-11-19 1959-01-22 Fmc Corp Process for bleaching wood pulp
US3005250A (en) * 1955-03-07 1961-10-24 Charles G Hatay Machine for fabric finishing to reduce shrinkage and improve the feel and hand of cloth
US2920011A (en) * 1955-03-18 1960-01-05 Waldorf Paper Prod Co Elevated temperature and pressure two stage hypochlorite peroxide pulp bleaching process
US2960382A (en) * 1955-05-13 1960-11-15 Armstrong Cork Co Method of bleaching linoleum using hydrogen peroxide bleach
US2868615A (en) * 1955-06-28 1959-01-13 Du Pont Continuous scouring and bleaching of gray goods
US2946476A (en) * 1955-08-29 1960-07-26 Ici Ltd Sealing device
US2839353A (en) * 1956-04-26 1958-06-17 Du Pont High speed peroxide textile bleaching process
US2986912A (en) * 1958-04-14 1961-06-06 Chemstrand Corp Textile treating apparatus
US3106460A (en) * 1959-05-01 1963-10-08 Calico Printers Ass Ltd Process for removing organic solvent from wet material
US3027740A (en) * 1960-04-29 1962-04-03 American Cyanamid Co Tow-processing apparatus
US3066006A (en) * 1960-04-29 1962-11-27 American Cyanamid Co Method of processing a tow
US3037369A (en) * 1960-06-23 1962-06-05 American Cyanamid Co Apparatus for the fluid treatment of strands of elongated material
US3083073A (en) * 1960-06-23 1963-03-26 American Cyanamid Co Method for the fluid treatment of strands of elongated material
US3150918A (en) * 1962-03-29 1964-09-29 Pittsburgh Plate Glass Co Method of bleaching cotton piece goods
US3457029A (en) * 1967-08-12 1969-07-22 Ilma Ind Lavorazioni Metalli A Apparatus and process for continuously steaming textile fiber materials
US3730678A (en) * 1967-09-06 1973-05-01 Burlington Industries Inc Process for treating textile materials
US4883557A (en) * 1987-08-26 1989-11-28 Tokyo Gas Co., Ltd. Method for lining pipe lines with a pressurized gas
US4948452A (en) * 1987-08-26 1990-08-14 Tokyo Gas Co., Ltd. Apparatus for lining pipe lines including liquid seal means
US5259212A (en) * 1990-12-14 1993-11-09 Liquid Carbonic Corporation Cryogenic freezer with a liquid trap
US5529625A (en) * 1993-04-01 1996-06-25 General Electric Company Coating apparatus and gas seal
US5714043A (en) * 1995-09-14 1998-02-03 Tire Recycling Technologies Corp. Liquid seal bulk feeder for destructive distillation
US7743912B2 (en) 2005-08-05 2010-06-29 Finley Dana J Liquid seal bulk feeder for destructive distillation of lightweight materials

Similar Documents

Publication Publication Date Title
US2029985A (en) Method of bleaching
US2267718A (en) Textile treating process
US2107297A (en) Bleaching fiber
US2334066A (en) Textile treating process
US2173474A (en) Bleaching
US2173040A (en) Desizing textiles
US2970882A (en) Process for continuous purification of bulk fiber
US2194358A (en) Bleaching artificial textile fibers
US2073682A (en) Processes of treating vegetable fibrous material for the production of cellulose fibe
US2037119A (en) Continuous bleaching process
US2070210A (en) Method of scouring and bleaching of wool and other animal fiber textile materials
KR930005927B1 (en) Method for desizing and scouring of cloth
US1980498A (en) Method for mercerizing cotton fibers
US2283141A (en) Treatment of textile fabrics
US2220682A (en) Method of bleaching fibers of vegetable origin
US2189378A (en) Bleaching fibers and a composition therefor
US3056645A (en) Process of bleaching sized cotton fabrics
US3148019A (en) Process of alkaline scouring and peroxide bleaching of gray cotton cloth
US2020437A (en) Process for bleaching vegetable fibers
US8303A (en) Improvement in chemical processes for fulling vegetable and other textures
US3567365A (en) Monitoring the wet processing of a material
US1825178A (en) Process for the treatment of fibers or fibrous materials
US2868615A (en) Continuous scouring and bleaching of gray goods
GB2083847A (en) Wet heat treating textiles
US1972608A (en) Method and means for treating fibrous material with electric current