US3762868A - Method for vapor treating textile material - Google Patents

Method for vapor treating textile material Download PDF

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Publication number
US3762868A
US3762868A US00217847A US3762868DA US3762868A US 3762868 A US3762868 A US 3762868A US 00217847 A US00217847 A US 00217847A US 3762868D A US3762868D A US 3762868DA US 3762868 A US3762868 A US 3762868A
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United States
Prior art keywords
vapor
pressure
valve
autoclave
textile material
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Expired - Lifetime
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US00217847A
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English (en)
Inventor
G Champel
F Ody
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.)
Lagarde J SA Ets
Lagarde J Sa fr Ets
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Lagarde J SA Ets
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    • 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
    • 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
    • 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

  • a vacuum is first created and the vapor is then introduced into the autoclave around the fibers to be treated.
  • the establishment of the vacuum permits the vapor to penetrate more rapidly and deeply into the material to be treated, within which the vacuum is first established. It follows that the rapidity of penetration of the vapor into the textile material depends not only upon the characteristics of the material and its shape, but also on the pressure of the vapor. At each moment of treatment, the difference between the pressure around the textile and that inside the same textile decreases as time passes, which slows down the penetration and requires the treatment to be carried out for a considerable length of time in order to render it homogeneous.
  • a mass of threads or fibers is, after being subjected to vacuum, surrounded by a vapor at 130, which corresponds to an absolute pressure of 2.76 kglcm there is at first a pressure difference of 2.76 kg/cm between the center of the material and the vaporous atmosphere which surrounds it.
  • This difference is no more than 1.72 ltg/cm when the center of the material reaches 100 and 0.73 ltg/cm when it reaches 120 and finally 0.16 kg/cm when it reaches 128.
  • the present invention is intended to provide a process for vapor treating textile materials which will eliminate these disadvantages and thus insure rapid passage of vapor through the textile material, while effectively controlling the temperature inside that mate rial.
  • the introduction of vapor is then temporarily discontinued while substantially equalizing the pressure on the input side and the output side, and this succession of pressure differences and equalization of these pressures is repeated several times.
  • the invention thus makes it possible to insure an adjustable pressure difference between the outside and the center of the textile material, which difference in pressure is practically independent of the temperature inside the textile material, which may be kept at a selected value as a consequence of the equalization in pressure.
  • the successive alternations between pressure difference and equality in pressure may take place partly while the material is being treated by the passage of vapor therethrough in one direction and partly while vapor is passing therethrough in the opposite direction.
  • the total duration of alternations between differences and equalizations in pressure while the vapor is passing through the material in one direction may be different from or equal to the duration of the corresponding alternations during passage in the other direction.
  • the invention in accordance with the invention, it is possible to establish a vacuum inside the textile material being treated before each passage of vapor therethrough, but the invention makes it possible to insure an extremely rapid and homogeneous treatment even in the absence of a preliminary high or partial vacuum.
  • the textile material to be treated is located in a container having two open ends, one of which constitutes the vapor entrance and the other the vapor outlet, these two ends being reversed in the course of treatment.
  • a container having two open ends, one of which constitutes the vapor entrance and the other the vapor outlet, these two ends being reversed in the course of treatment.
  • almost the entire outer surface of the material is left free and a duct is introduced into the center of the material so that the free surface of the material serves alternately as vapor inlet and vapor outlet whereas the internal duct serves alternately as vapor outlet and vapor inlet.
  • the opposite part is provided with a vapor outlet duct.
  • These ducts are provided with a valve permitting a higher pressure to be created in a first part of the chamber in a first step so as to force the vapor through the material whereas in a second step this circulation is stopped to permit the two parts of the chamber to reach the same pressure, after which the same alternation is repeated.
  • one of the two parts of the chamber is bounded by the textile material to be treated and may be bounded by the greater part of the surface of the textile material, the other part being bounded by a perforated tubular duct penetrating into the mass of textile material. It is also possible, even though less advantageous from the point of view of technical simplicity, to position the material at the bottom of a chamber with the perforated duct penetrating into the material from the bottom, in which case one of the two parts defined by the material, to wit, the part defined by the perforated tube, is not part of the chamber proper.
  • the valves are controlled by means of a pressure responsive device which is positioned in the part of the chamber corresponding to the vapor outlet and controls the valve for admitting vapor into the other part up until a certain pressure has been attained in said outlet part.
  • the pressure responsive means closes the vapor inlet valve and opens the outlet valve for a time sufficient to lower the pressure in the part of the chamber corresponding to the vapor outlet, after which the pressure responsive device again opens the vapor inlet valve so that the cycle recommences.
  • each of the two parts is provided with a supply duct and a outlet duct as well as a pressure responsive device.
  • the device according to the invention is provided with a duct permitting a vacuum to be established in the chamber.
  • heating devices and temperature control devices such as external coils may be provided.
  • FIG. 1 is a schematic view showing a device of the autoclave type for carrying out the invention.
  • FIG. 2 is a view of a container for holding textile material according to a variation of the invention.
  • the illustrated autoclave is vertically positioned and has a round bottom 2 forming the lower part through which vapor is exhausted and a cover 3 forming the upper part through which vapor is admitted.
  • the textile material to be treated is positioned in a container 5 covered by a perforated plate 6, with a sealing member 7 between the container 5 and the perforated plate 6.
  • a ring 8 supporting through a second sealing member 9 the perforated bottom 10 of the container 5.
  • the curved bottom part is welded to a coil 12 the inlet duct 12a of which is connected to the inlet duct 11a and the exhaust 12b of which is also provided with a drain.
  • a last coil 13 provided with its own inlet duct 13a and its own exhaust 13b encircles the vertical part of the autoclave 1.
  • the inlet valve 130 of the coil 13 is controlled by a thermostat 14 for regulating the temperature around the autoclave.
  • a duct 15 leads into the cover and has a first branch leading to an automatic vapor inlet valve 16 whereas its other branch leads to an automatic valve 17 through which the vapor may be evacuated.
  • the arrows on the drawing show the directions in which the vapor circulates under the control of these valves.
  • the bottom 2 of the autoclave is provided with a duct 18, one branch of which leads to an automatic valve 19 for admitting vapor to the bottom of the autoclave, whereas another branch leads to an automatic valve 20 permitting the exhaust of the vapor from the bottom of the autoclave.
  • another automatic valve 21 positioned in the duct 18 makes it possible to create a partial or high vacuum, as necessary, inside the autoclave.
  • a first pressure responsive means 22 is responsive to the pressure in the autoclave bottom part 2, that is to say beneath the container 5, and controls the valves 16 and 20, whereas a second pressure responsive means responsive to the pressure in the upper part of the chamber 5, which pressure is equal to the pressure at the level of the cover 3 controls the valves 17 and 19.
  • the vapor outlet valves 17 and 20 may be connected to a vacuum pump or to any source of subatmospheric pressure, or even to atmospheric pressure, or to any other means for providing a relatively low pressure.
  • vapor is introduced into the autoclave from the top, that is to say the vapor arrives through the valve 16, passes through the material and leaves through the valve 20. If the treatment pressure of the fibers is less than atmospheric pressure, a partial vacuum is first created to the extent required by regulating the valve 21. For such a vacuum treatment, the vapor outlet valves 17 and 20 (or one of them only, if the vapor travels in only one direction) are connected to a partial or high vacuum. Once a vacuum has been established in the autoclave, valve 21 is closed and the pressure responsive means 22 preset to the predetermined treatment pressure, opens the valve 16.
  • the vapor is then admitted to the inside of the autoclave and as the vapor passes through the textile material the pressure increases little by little in the bottom 2 of the autoclave.
  • the valve 16 closes and the valve 20 opens which results in a rapid pressure drop.
  • pressure responsive means 22 again opens the valve 16 and closes the valve 2% and the same cycle recommences.
  • the time may be regulated from zero to several seconds between the closing of 22 and the opening of 16 to leave more time for the equalization of pressure.
  • the operation is identical, but it is not necessary to first create a vacuum in the autoclave by opening the valve 21.
  • the substantial difference between the pressure prevailing in the upper part of the autoclave at the level of the top 3 and in the lower part at the level of the bottom 2 causes the vapor to pass rapidly through the textile material.
  • pressures are substantially equalized between the upper and lower parts of the autoclave and this insures a constant temperature in the textile material. This temperature is maintained practically constant during the initial alternating phase while the pressure decreases rapidly at the bottom of the autoclave, and the vapor again begins to pass through the textile material.
  • the autoclave described may also be used for a second method of carrying out the invention in which the vapor also circulates in the opposite direction from bottom to top within the autoclave.
  • the pressure responsive means 23 is preset to the pressure desired in the upper part of the autoclave.
  • This pressure responsive means 23 controls the opening of the lower vapor inlet valve 19 and, when the desired pressure is reached in the upper part of the autoclave, the valve 19 is closed by the pressure responsive means and the upper vapor exhaust valve 17 is opened.
  • the pressure at the level of the pressure responsive means 23 then decreases rapidly, which results in closing the exhaust valve 17 and opening the lower inlet valve N. This cycle is repeated several times and may obviously be combined with cycles in the reverse direction controlled by the pressure responsive means 22.
  • At the end of the treatment at least one of the valves 17 and is opened and the autoclave may be opened to extract the container holding the material.
  • the thermostat 14 insures the regulation of the temperature of the wall of the autoclave by controlling the valve 13a of the coil 13, but may also actuate the valve 110 to supply the upper coil 11 and the lower coil 12.
  • the container 5 holding the polyester ribbon 4 is placed inside the autoclave.
  • the valves 17, 20 and 21. are first connected to a vacuum pump or an atmospheric or subatmospheric pressure, the valve 21 being opened for 30 seconds. This makes it possible to create an adequate vacuum in the autoclave. At the end of these 30 seconds the valve 20 is closed, and the valve 16 is opened to admit vapor. Once the pressure responsive means 22 has detected a pressure corresponding exactly to the temperature of 97.5 C, that is to say, an absolute pressure of 0.94 kg/cm the valve in closes and the valve 20 opens. Then, during the pressure drop, the valve 20 closes and the valve l6 opens. This succession of alternations takes place for a predetermined time of 1 minute.
  • tergal is vaporized at a temperature of ll7.5 C, which makes it unnecessary to connect the valves l7 and 2@ to vacuum.
  • the process is otherwise the same as the one which has just been described.
  • the textile material 4 is positioned inside a container 24, also located by means of a seal 9 on the seat 8.
  • the container 24 may be open or closed at its upper end or provided with a grill such as 6.
  • the lateral wall 25 of the container 24 is provided with a multitude of perforations connecting the space and the autoclave above the seal 9 and which lead to the upper part 3 and to almost the entire outer surface of the material 4, except for the lower surface of this material.
  • a perforated tube 26 in direct communication with the lower part 2 of the chamber. In this man ner, when vapor is introduced through the lower part of the chamber, the vapor penetrates into the interior of the material and leaves the material by its external surface.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
US00217847A 1971-01-18 1972-01-14 Method for vapor treating textile material Expired - Lifetime US3762868A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7101460A FR2122631A5 (es) 1971-01-18 1971-01-18

Publications (1)

Publication Number Publication Date
US3762868A true US3762868A (en) 1973-10-02

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US00217847A Expired - Lifetime US3762868A (en) 1971-01-18 1972-01-14 Method for vapor treating textile material

Country Status (6)

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US (1) US3762868A (es)
DE (1) DE2201980A1 (es)
ES (1) ES398936A1 (es)
FR (1) FR2122631A5 (es)
GB (1) GB1373993A (es)
IT (1) IT946613B (es)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0166323A2 (en) * 1984-06-26 1986-01-02 Knut Björn Lennart Lundberg Method for preventing contact with contaminated textiles and/or spreading of contaminants therein and container for carrying out said method
CN107723810A (zh) * 2017-11-28 2018-02-23 四川玉竹麻业有限公司 一种用于苎麻工序中固定麻条的装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2940217C2 (de) * 1979-10-04 1984-05-17 Mewa Mechanische Weberei Altstadt Gmbh, 6200 Wiesbaden Verfahren zum Entwässern von Wäsche sowie Entwässerungsvorrichtung
DE3928763A1 (de) * 1989-08-30 1991-03-07 Ludwig Resch Verfahren und vorrichtung zum daempfen von garn

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0166323A2 (en) * 1984-06-26 1986-01-02 Knut Björn Lennart Lundberg Method for preventing contact with contaminated textiles and/or spreading of contaminants therein and container for carrying out said method
US4642828A (en) * 1984-06-26 1987-02-17 Lundberg Knut B L Method for preventing contact with contaminated textiles and/or spreading of contaminants therein
EP0166323A3 (en) * 1984-06-26 1988-04-27 Knut Bjorn Lennart Lundberg Method for preventing contact with contaminated textiles and/or spreading of contaminants therein and container for carrying out said method
CN107723810A (zh) * 2017-11-28 2018-02-23 四川玉竹麻业有限公司 一种用于苎麻工序中固定麻条的装置
CN107723810B (zh) * 2017-11-28 2023-04-28 四川玉竹麻业有限公司 一种用于苎麻工序中固定麻条的装置

Also Published As

Publication number Publication date
FR2122631A5 (es) 1972-09-01
DE2201980A1 (de) 1972-08-10
IT946613B (it) 1973-05-21
GB1373993A (en) 1974-11-13
ES398936A1 (es) 1974-08-16

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