US3544261A - Process for bleaching textiles - Google Patents

Process for bleaching textiles Download PDF

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Publication number
US3544261A
US3544261A US654119A US3544261DA US3544261A US 3544261 A US3544261 A US 3544261A US 654119 A US654119 A US 654119A US 3544261D A US3544261D A US 3544261DA US 3544261 A US3544261 A US 3544261A
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United States
Prior art keywords
bleaching
chamber
textile material
steam
solution
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
US654119A
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English (en)
Inventor
Shamrao Harischandra Mhatre
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.)
Buckingham and Carnatic Ltd
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Buckingham and Carnatic Ltd
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 Buckingham and Carnatic Ltd filed Critical Buckingham and Carnatic Ltd
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Publication of US3544261A publication Critical patent/US3544261A/en
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C7/00—Heating or cooling textile fabrics
    • 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
    • D06B3/00—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating
    • D06B3/10—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of fabrics
    • D06B3/12—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of fabrics in zig-zag manner over series of guiding means
    • 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
    • D06L4/18—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen in a gaseous environment
    • 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
    • D06L4/20—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen
    • D06L4/29—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen in a gaseous environment
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C2700/00—Finishing or decoration of textile materials, except for bleaching, dyeing, printing, mercerising, washing or fulling
    • D06C2700/13—Steaming or decatising of fabrics or yarns

Definitions

  • the proposed process is an improvement over the known process of bleaching textiles using sodium or calcium hypochlorite solution alone or in admixture with other substances.
  • the conventional practice of bleaching consists of impregnating textiles in a hypochlorite solution and storing it until bleaching is complete. The same practice is followed while using the hypochlorite in admixture with other substances. This is a time consuming process and involves the use of a I-box or a timing wheel in the rope form or open width where the fabric is subjected to considerable crushing which may lead to shadow creases. This is a serious disadvantage if the fabric or web or any other textile material is to be subsequently dyed.
  • the conventional process is also limited to a narrow range of useful pH, viz 9.5 to 10.5 in that at pH values below 9.5 the risk of degradation of cellulose is a serious factor and at pH values above 10.5 a satisfactory level of whiteness is not produced.
  • the object of this invention is to improve the conventional process so as to complete the bleaching within a relatively short period. Time for bleaching can in fact be reduced to the order of a few seconds from that of few hours as at present.
  • the textile material which is in the grey state, or scoured or desized state is treated, conveniently at room temperature, with either sodium hypochlorite or calcium hypochlorite solution (aqueous) or both, with or without other additives such as wetting agents or chelating agents 3,544,261 Patented Dec. 1, 1970 ice such as ethylenediamine tetraacetic acid and diethylenetriamine pentaacetic acid or sodium chloride or sodium bromite, or other catalyst and/ or accelerator for the purpose, proprietary or otherwise, squeezed to give the required pick-up of bleaching agent, and then heated under steam when in a few seconds the bleaching action is completed.
  • sodium hypochlorite or calcium hypochlorite solution aqueous
  • chelating agents 3,544,261 Patented Dec. 1, 1970 ice such as ethylenediamine tetraacetic acid and diethylenetriamine pentaacetic acid or sodium chloride or sodium bromite, or other catalyst and/ or accelerator for the purpose, proprietary or otherwise, squeeze
  • the textile material dry or wet, is passed through a pad or mangle containing the bleaching solution maintained at a desired pH, ranging from 7 to 12, and at room temperature. It is subjected to the benefit of one or more nips so adjusted to give the desired resultant pick-up of bleaching agent. Usually the pick-up of 45 to 100% of the bleaching or of 0.05 to 1.0% of active chlorine on the weight of the textile material is desirable.
  • the so treated material is exposed to the action of either saturated or superheated steam in a chamber or a pressure vessel, which is also referred to as agen The value of this temperature may range from 50 C. to 140 C.
  • the textile material (after impregnating With the said bleaching solution, with or Without additives), lmay be preheated in a preheater using steam or infrared or direct heat radiations just prior to steaming in the main chamber.
  • Concentration of bleaching solution is preferably from 0.25 to 10.0 gms/1. of active chlorine.
  • the present invention also proposes a plant for bleaching using the foregoing process.
  • the plant will comprise of an impregnating chamber for the bleaching solution and a steam chamber or ager with means to convey textile material from the former to the latter and means to remove the bleached textile material from the steam chamber.
  • a pre-heating chamber is included in the plant prior to conveying the impregnated textile material to the steam chamber.
  • the plant comprises an impregnating chamber, a steam pre-heating chamber, a second impregnating chamber and steam chamber for completing bleaching.
  • drying means may be a series of heated cylinders or a hot air chamber.
  • Means for expressing the textile material after impregnation as well as after washing are also preferably included in the plant according to various embodiments.
  • a pad or mangle, with or without an auxiliary saturator is used as an impregnation chamber so that material to be treated with bleaching solution can be given the benefit of one or more impregnations and nips to impart requisite pick-up of bleaching agent.
  • FIG. 1 shows a plant which will be needed to carry out the process in its broadest sense.
  • FIG. 2 shows more comprehensive plant in accordance with this invention.
  • the impregnating box is marked 1 and has a series of rollers 11 around which the textile material 10 passes and gets impregnated with the bleachprovement which comprises:
  • the textile material 10 from the rst impregnating chamber 1 after passing around a set of rollers 11 is nipped at rollers 12 and conveyed by the nipping rollers and roller 13 into preheating chamber 2 where after passing over a set of rollers 14 it is conveyed by rollers 15 into the second impregnating chamber 3.
  • the textile material is nipped at rollers 17 and conveyed into steaming chamber or ager 4 where the textile material is nally bleached.
  • Nipping rollers 23 and rollers 24 convey the bleached and washed material to drying means 8 comprising a series of heated rollers 9 after passing around which the bleached, washed and dried material 10 is taken o a roller 25.
  • a preheater 26 with rollers 27 may be employed in conjunction with steam chamber 2.
  • aqueous hypochlorite bleaching solution having a chlorine content of about 0.25-10 grams/liter and a pH of about 7-12, the rate of movement of said material through said solution being such as to impregnate said material with about (10S-1.0% of chlorine by weight of said material; exposing said resultant impregnated material for a period of about 15-60 seconds to an atmosphere of saturated or supersaturated steam at about 50-140 C. and washing and drying said material.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Detergent Compositions (AREA)
US654119A 1966-07-22 1967-07-18 Process for bleaching textiles Expired - Lifetime US3544261A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB33044/66A GB1190006A (en) 1966-07-22 1966-07-22 Process and apparatus for Bleaching Textiles

Publications (1)

Publication Number Publication Date
US3544261A true US3544261A (en) 1970-12-01

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ID=10347773

Family Applications (1)

Application Number Title Priority Date Filing Date
US654119A Expired - Lifetime US3544261A (en) 1966-07-22 1967-07-18 Process for bleaching textiles

Country Status (8)

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US (1) US3544261A (de)
AT (1) AT286917B (de)
BE (1) BE701149A (de)
DE (1) DE1594821C3 (de)
ES (1) ES343312A1 (de)
GB (1) GB1190006A (de)
NL (1) NL6710014A (de)
SE (1) SE330148B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108547098A (zh) * 2018-05-16 2018-09-18 绍兴永通印花有限公司 一种印花棉布的退浆联合机

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1754909A (en) * 1921-07-15 1930-04-15 Ig Farbenindustrie Ag Process of rapidly bleaching vegetable fibers of any kind

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1754909A (en) * 1921-07-15 1930-04-15 Ig Farbenindustrie Ag Process of rapidly bleaching vegetable fibers of any kind

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108547098A (zh) * 2018-05-16 2018-09-18 绍兴永通印花有限公司 一种印花棉布的退浆联合机
CN108547098B (zh) * 2018-05-16 2019-04-02 绍兴永通印花有限公司 一种印花棉布的退浆联合机

Also Published As

Publication number Publication date
SE330148B (de) 1970-11-09
ES343312A1 (es) 1968-09-01
BE701149A (de) 1967-12-18
GB1190006A (en) 1970-04-29
NL6710014A (de) 1968-01-23
DE1594821B2 (de) 1973-09-13
AT286917B (de) 1970-12-28
DE1594821C3 (de) 1974-04-11
DE1594821A1 (de) 1970-12-10

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