EP0135403B1 - Procédé de fabrication d'une nappe de coton hydrophile ainsi que nappe obtenue conformément à la mise en oeuvre de ce procédé et pièces de coton de formes quelconques obtenues par découpage d'une telle nappe - Google Patents

Procédé de fabrication d'une nappe de coton hydrophile ainsi que nappe obtenue conformément à la mise en oeuvre de ce procédé et pièces de coton de formes quelconques obtenues par découpage d'une telle nappe Download PDF

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Publication number
EP0135403B1
EP0135403B1 EP84401394A EP84401394A EP0135403B1 EP 0135403 B1 EP0135403 B1 EP 0135403B1 EP 84401394 A EP84401394 A EP 84401394A EP 84401394 A EP84401394 A EP 84401394A EP 0135403 B1 EP0135403 B1 EP 0135403B1
Authority
EP
European Patent Office
Prior art keywords
liquid
fleece
cotton
autoclave
bobbin
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
Application number
EP84401394A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0135403A1 (fr
Inventor
Jean-François Caumont
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.)
Georgia Pacific SARL
Original Assignee
TEMPO SANYS DITE Ste
Tempo Sanys Dite Ste
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 TEMPO SANYS DITE Ste, Tempo Sanys Dite Ste filed Critical TEMPO SANYS DITE Ste
Priority to AT84401394T priority Critical patent/ATE27315T1/de
Publication of EP0135403A1 publication Critical patent/EP0135403A1/fr
Application granted granted Critical
Publication of EP0135403B1 publication Critical patent/EP0135403B1/fr
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/425—Cellulose series
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • 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
    • D06B5/00—Forcing liquids, gases or vapours through textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing impregnating
    • D06B5/12—Forcing liquids, gases or vapours through textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing impregnating through materials of definite length

Definitions

  • the present invention relates to a process for the production of a sheet of hydrophilic cotton from raw cotton fibers, in particular from dressing gowns obtained as waste in the process of preparing cotton fibers for the spinning and weaving.
  • the longest fibers are sorted to be used for spinning and weaving.
  • the waste from this first sorting or combing operation is considered, in cotton technology, as high-end waste used as raw material for the processes of manufacturing hydrophilic cotton, make-up removal products, pharmaceutical or surgical pads, baby diapers, etc.
  • This waste is made up of fine, disentangled fibers that are very clean and contain little plant debris or other polluting agents.
  • the conventional method of treating such combing gowns consists in successively subjecting the raw cotton fibers (therefore unbleached) to pre-threshing and working operations so as to obtain cotton in open flakes and physically cleaned, then in subject these cotton flakes to a scouring treatment consisting in removing the fats (pectins, fatty elements, etc.) present around the fiber and therefore making the cotton hydrophilic.
  • This scouring is generally carried out using a sodium hydroxide solution. It is generally followed by a bleaching operation in particular by means of hydrogen peroxide intended to give the cotton fibers the whiteness necessary for their presentation in trade.
  • the cotton having undergone this scouring and bleaching operation is then brought into a carding shop where it is treated on cards which paint the cotton fibers in a very fine manner, align them in parallel, separate them from one another, and make them a veil which is then treated.
  • this sheet is brought to a wetting bath consisting of hot water (50 to 60 ° C.) to which a wetting agent has been added to densify the sheet and the prepare for the subsequent scouring-bleaching operation, so as to obtain a more compact sheet having a certain resistance by physical cohesion, then, at the end of the wetting bath, this sheet is wrung between calendering rolls and it is wound on a cylinder which is then introduced into the autoclave to undergo the scouring and bleaching operations there.
  • a wetting bath consisting of hot water (50 to 60 ° C.) to which a wetting agent has been added to densify the sheet and the prepare for the subsequent scouring-bleaching operation, so as to obtain a more compact sheet having a certain resistance by physical cohesion
  • the present invention therefore relates to a method making it possible to obtain very coherent cotton webs.
  • the subject of the invention is a process characterized in that during the scalding and bleaching operations in the autoclave, the treatment liquids are circulated radially through the turns of the coil so that it a differential pressure is established between the liquid entering the coil and the liquid leaving it, as a result of pressure losses resulting from the difficulty experienced by the liquid in passing through the coil.
  • This differential pressure causes a displacement and entanglement of the cotton fibers by hydraulic switching effect on the whole of the wound ply constituting the coil, thus notably increasing the cohesion of said ply.
  • the method according to the invention makes it possible to greatly increase the cohesion of the web, by combining the effect of physical adhesion of the cotton fibers which tend to curl and become entangled under the effect of liquids. treatment (soda at a temperature of about 125 ° C for scouring) on the one hand, and the hydraulic needling effect obtained during the passage of treatment liquids through the coil on the other hand.
  • this effect is significantly increased compared to the conventional processes described in the two above patents, since it is an additional operation applied to a coil comprising numerous turns corresponding to a length of ply wound up to over 1,000 meters.
  • this is not a punctual treatment by nozzles, but a treatment over the entire surface of the sheet.
  • the autoclave is connected to a closed circuit for circulation of treatment liquid comprising a pipe for entering the liquid into the coil and a pipe for leaving the liquid, as well as a powerful pump. likely to suck the liquid from the coil and return it.
  • the closed liquid circulation circuit comprises a bypass pipe provided with an adjustable valve provided between the inlet pipe for the treatment liquid and the outlet pipe for this liquid.
  • a modification of the valve setting causes a modification of the differential pressure existing between the inlet and the outlet of the coil and consequently, the cohesion properties of a sheet leaving the autoclave.
  • each of the perforations of the cylinder corresponds to the passage of a jet of liquid through the sheet in a roll (perpendicular to the axis of this roll), giving rise to a displacement of fibers.
  • the differential pressure can be adjusted according to the desired cohesion between 20,000 and 80,000 Pa.
  • This differential pressure can be adjusted to a lower level, in order to obtain less coherent or higher layers, to reach very solid felts.
  • Cut pieces of a sheet obtained by the process of the invention are generally presented commercially in the form of washers, and in particular washers whose diameter is of the order of 6 cm.
  • the qualities required of such a tablecloth are to be soft enough for the skin while having a strength and therefore sufficient cohesion so as not to tear during use or fluff.
  • Another important quality is linked to the possibility of absorption of the pharmaceutical or cosmetological liquids usually used, and this without harming the cohesion. However, this absorption should not be too rapid to allow the user time to spread the treating products on the skin.
  • the washers cut from the ply have a longitudinal resistance between 12 and 20 Newtons and a transverse resistance between 10 and 15 Newtons and a tear resistance in the thickness direction between 3 and 4 Newtons.
  • the value of the differential pressure found which is generally measured from the height of a column of water, is a function of the air permeability of the cotton sheet considered, and therefore a function of the apparent density. It is indeed obvious that the air permeability is lower the higher the apparent density of cotton.
  • Such a micronaire apparatus was used to compare the air permeability of cotton washers obtained according to the process which is the subject of the invention, and the air permeability of cotton washers of the same weight obtained according to to prior art methods (samples 2, 3, 4 and 5).
  • the results obtained, each of which corresponds to an average of results observed on samples from identical processes are collated in the table appearing in appendix 1.
  • the apparatus used was graduated in such a way that the value read on the right column was as much higher as the air permeability was lower and therefore the higher density.
  • Annex 2 also mentions what are the values of the elongations corresponding to a stretch with a force similar to that studied above. These maximum elongations corresponding to the start of rupture confirm the results observed above, namely that the consistency of the ply obtained in accordance with the process according to the invention is significantly greater than that of the plies obtained in accordance with the implementation of the the prior art, and this, both in the machine direction and in the transverse direction.
  • the washers cut from the sheet must be capable of absorbing the fluids to a certain extent.
  • the absorption speed should not be too high, since, in the case of make-up removers, for example, the lotion should not disappear instantly in the washer even before the user has applied it to her face. .
  • this device consists of a cell 30 emitting an infrared beam and a receiver 31 which delivers in response a voltage signal proportional to the "transparency" or permeability to infrared rays of the object being measured.
  • the cell it is possible to use, for example, the SAS cell marketed by SUNX LTD.
  • This voltage signal is read on the dial 21 of an electronic reading device 20 further comprising a stopwatch 22.
  • a sample washer 23 to be studied is placed in the beam generated by the detector upstream from the receiver.
  • a dropper device 25 equipped with a device 26, in particular a tap capable of causing the sample washer 23 to fall in the area of its surface traversed by infrared radiation. , a specified amount of water or other liquid. It can be seen that the residual power of the beam passing through the washer 23 increases as a direct function of the degree of impregnation of the washer 23 tested. Therefore, the number read on the dial 21 can give an idea of the absorption of the liquid by the washer 23.
  • the distance from the washer to be studied 23 to the dropper 25 can be adjusted by means of specific members 29 not shown in detail in the figure. Of course, for a series of comparative measurements, this distance should be fixed once and for all.
  • the figure appearing on the dial 21 is a direct function of the "obstacle" encountered by the infrared beam when it passes through the sample to be measured 23, and consequently varies according to the properties absorption of the sample vis-à-vis the liquid sent by the dropper 25.
  • the initial value (instant zero) is related to the opacity of the studied sample, and therefore, depends on its thickness, density and composition, while the variation of this value over time is direct relationship with the absorption properties and in particular the speed of absorption.
  • Annex 6 shows the curves obtained from the five series of samples after the injection of two cubic centimeters of water.
  • the device was calibrated to withstand variations ranging from 4,000 (maximum beam obstruction caused by the presence of a medium-sized and dry washer) and 0 (maximum beam passage, when none object does not intervene in its field). All these curves have two zones: a first zone in which the slope of the curve is relatively steep: it corresponds to the absorption phase proper, and a second zone in which each of the curves becomes more or less horizontal: it corresponds to the saturation of the sample.
  • the raw cotton used for the process is led according to arrow 1 to a first station of process A in which it is subjected to conventional operations of pre-threshing and working. Leaving the first station A, cotton is obtained in open flakes and physically cleaned, which are led in accordance with arrow 11 to a second station B consisting of perforated cylinders inside which there is a certain depression. These cylinders, which are not shown in detail in Figure 2, attract the flakes under the effect of their internal vacuum. At the end of this second station B, there is obtained an almost uniform cotton sheet III which is of a sparkling appearance and has practically no consistency.
  • This sheet has a thickness which is of the order of 6 centimeters; it is then brought to a station C constituted by a wetting bath similar to that described in French patent n ° 2 081 133. At the end of this wetting machine the sheet III is transformed into a sheet IV which is now only about 1 , 4 mm thick and was therefore strongly packed.
  • This layer which has a certain hold due to the fact that the cotton fibers tend to curl and become entangled with one another under the effect of contact with the hot treatment liquid of station C, is then wrung between calender rollers D before being wound on a hollow cylinder 1 which will be described in more detail in the remainder of this description.
  • coils E are obtained which consist of a length of cotton sheet IV which can exceed 1 km, wound on a cylinder 1. Such coils E are ready to be subjected to the scouring and bleaching operations which are shown in FIG. 3.
  • the coils E1 and E2 of the cotton web 4 are placed end to end in the autoclave. Their mandrels 1 are joined and closed at 10 by a cover. These cylinders 1 have on their periphery, perforations 12 uniformly distributed. Before their positioning in the autoclave 2, the coils E1 and E2 are each enclosed in a cylindrical corset 3 having, on its periphery, perforations 4 similar to the perforations 12 provided on the periphery of the cylinders 1.
  • the open end 11 of the cylinders 1 faces one of the ends of a circuit 5 for circulation of treatment liquid.
  • the second end of this circuit 5 is connected to an orifice 13 provided for this purpose in the autoclave 2.
  • the circuit 5 is moreover provided with a pump 6 capable of circulating a treatment liquid along the arrow X (scouring) , bleaching or rinsing) previously introduced into the autoclave 2 through the supply or drain port 7.
  • the operating direction of the pump 6 is such that the treatment liquid penetrates along arrow X first of all through the open end 11 into the internal part of the cylinder 1, before escaping through the orifices 12 according to the arrows a, to cross the coils E1 and E2 before escaping again through the orifices 4 provided in the corsets 3 according to the arrows b, then, to assemble according to the arrow Y at the level of the orifice 13 of the autoclave 2 to be sucked by pump 6, then pumped again according to arrow X and return again to cylinder 1.
  • the treatment liquid flows, according to the arrows a, through the turns of the coils E1 and E2.
  • This liquid which, when boiled, consists of soda at a temperature of about 130 °, during bleaching with hydrogen peroxide, and, during rinsing which must be provided downstream with pure water experiences some discomfort when crossing coils E1 and E2.
  • the existence of this differential pressure is brought to light by two upstream and downstream pressure gauges 8 and 9 respectively placed on the circuit of treatment liquid upstream and downstream of the coils E1 and E2.
  • the hydraulic needling effect indicated above could be obtained in a similar manner by subjecting the coils B1 and B2 only to the scouring treatment.
  • the bleaching operation is essential to present a white tablecloth for sale.
  • the circuit 5 is provided with a bypass pipe 14 provided with an adjustable valve 15.
  • a modification of the setting of this valve 15 causes a modification of the differential pressure existing between the liquid X entering the coils E1 and E2, and the liquid Y leaving it. It follows a modification of the property; of the final ply which will be obtained at the exit from the autoclave 2 by unwinding the coils E1 and E2.
  • this differential pressure which is measured continuously during operation, is generally regulated so that it is not less than 40,000 Pa, which corresponds to an upstream pressure of 140,000 Pa and a downstream pressure of 100,000 Pa for the products mentioned: make-up removal.
  • the invention is not however limited to products intended for make-up removal and may allow more aerated products to be obtained from lower differential pressures and more compact products from higher differential pressures.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Artificial Filaments (AREA)
EP84401394A 1983-09-21 1984-07-02 Procédé de fabrication d'une nappe de coton hydrophile ainsi que nappe obtenue conformément à la mise en oeuvre de ce procédé et pièces de coton de formes quelconques obtenues par découpage d'une telle nappe Expired EP0135403B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84401394T ATE27315T1 (de) 1983-09-21 1984-07-02 Verfahren zur herstellung eines absorbierenden, baumwollenen vlieses, und dadurch hergestelltes vlies, sowie baumwollene stuecke willkuerlicher form, die aus einem solchen vlies herausgeschnitten sind.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8315026A FR2552120B1 (fr) 1983-09-21 1983-09-21 Procede de fabrication d'une nappe de coton hydrophile ainsi que nappe obtenue conformement a la mise en oeuvre de ce procede et pieces de coton de formes quelconques obtenues par decoupage d'une telle nappe
FR8315026 1983-09-21

Publications (2)

Publication Number Publication Date
EP0135403A1 EP0135403A1 (fr) 1985-03-27
EP0135403B1 true EP0135403B1 (fr) 1987-05-20

Family

ID=9292415

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84401394A Expired EP0135403B1 (fr) 1983-09-21 1984-07-02 Procédé de fabrication d'une nappe de coton hydrophile ainsi que nappe obtenue conformément à la mise en oeuvre de ce procédé et pièces de coton de formes quelconques obtenues par découpage d'une telle nappe

Country Status (6)

Country Link
US (2) US4658477A (enrdf_load_stackoverflow)
EP (1) EP0135403B1 (enrdf_load_stackoverflow)
JP (2) JPS6099055A (enrdf_load_stackoverflow)
AT (1) ATE27315T1 (enrdf_load_stackoverflow)
DE (1) DE3463796D1 (enrdf_load_stackoverflow)
FR (1) FR2552120B1 (enrdf_load_stackoverflow)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK0735175T3 (da) * 1995-03-27 1999-09-27 Procter & Gamble Fremgangsmåde til fremstilling af et vatark og bomuldsstykker fremstillet ved udskæring af et ark frembragt ved anvendelse
EP0750062B1 (en) * 1995-06-23 1999-05-26 The Procter & Gamble Company Disposable skin cleansing articles
US6015045A (en) 1996-08-09 2000-01-18 The Procter & Gamble Company Hygienic package with a reclosable flap
US6379494B1 (en) * 1999-03-19 2002-04-30 Weyerhaeuser Company Method of making carboxylated cellulose fibers and products of the method
US6919447B2 (en) * 2001-06-06 2005-07-19 Weyerhaeuser Company Hypochlorite free method for preparation of stable carboxylated carbohydrate products
US20050028953A1 (en) * 2003-08-05 2005-02-10 Severeid David E. Methods for making carboxylated pulp fibers
US7001483B2 (en) * 2003-08-05 2006-02-21 Weyerhaeuser Company Apparatus for making carboxylated pulp fibers
SG125160A1 (en) * 2005-02-06 2006-09-29 Jianquan Li Method for producing spunlace non-woven cloth, method for producing spunlace non-woven cloth with x-ray detectable element, spunlace non-woven cloth with x-ray detectable element produced thereby
RU2390591C1 (ru) * 2009-02-03 2010-05-27 Общество с ограниченной ответственностью "ЦЕЛОФОРМ" (ООО "Целоформ") Способ изготовления целлюлозной хирургической ваты
FR2978460B1 (fr) 2011-07-28 2014-07-11 Georgia Pacific France Produit fibreux absorbant contenant au moins 50% de fibres cellulosiques hydrophiles et comprenant au moins deux couches dont l'une est hydroliee
CN107937988A (zh) * 2017-09-30 2018-04-20 安徽利民生物科技股份有限公司 一种灵芝纤维的提取方法及其应用

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US1460519A (en) * 1921-06-06 1923-07-03 Cotono Corp Process of cleaning and conditioning cotton for spinning
US1596715A (en) * 1926-03-06 1926-08-17 James L Byers Process for humidifying finisher laps of cotton
US2250085A (en) * 1939-12-19 1941-07-22 Ernest A Stienen Apparatus for uniformly dyeing rayon cakes
US2280326A (en) * 1940-04-12 1942-04-21 Fibres Associates Inc Method for manufacturing staple fiber with high stretching capacity
BE454928A (enrdf_load_stackoverflow) * 1943-04-15
US2773297A (en) * 1951-08-30 1956-12-11 Louis M Cotchett Process and apparatus for making yarn and fabric
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US2803125A (en) * 1952-11-26 1957-08-20 Johnson & Johnson Apparatus for continuous treatment of fibers
US2892219A (en) * 1953-12-09 1959-06-30 Spinnfaser Ag Method of fluffing a wet fleece of staple fiber and a device for carrying out same
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CH465538A (de) * 1965-04-26 1969-01-15 Heberlein & Co Ag Verfahren zur Erzeugung von leinenartigen und ähnlichen opaken Versteifungseffekten auf cellulosehaltiges Fasermaterial enthaltenden Textilbahnen
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US3611507A (en) * 1968-08-22 1971-10-12 Kanegafuchi Spinning Co Ltd Production of worsted tops
FR2081133B1 (enrdf_load_stackoverflow) * 1970-03-09 1974-07-12 Serviere Hubert De
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FR2411912A1 (fr) * 1977-12-14 1979-07-13 Allibert Exploitation Procede de traitement des loofahs, et produit resultant de sa mise en oeuvre

Also Published As

Publication number Publication date
JPS62289658A (ja) 1987-12-16
DE3463796D1 (en) 1987-06-25
FR2552120A1 (fr) 1985-03-22
EP0135403A1 (fr) 1985-03-27
FR2552120B1 (fr) 1985-12-20
US4679278A (en) 1987-07-14
JPS646300B2 (enrdf_load_stackoverflow) 1989-02-02
JPS623259B2 (enrdf_load_stackoverflow) 1987-01-23
ATE27315T1 (de) 1987-06-15
US4658477A (en) 1987-04-21
JPS6099055A (ja) 1985-06-01

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