EP2041345A2 - Als wischtuch verwendbarer vliesstoff, herstellungsverfahren dafür und anlage zu seiner herstellung - Google Patents

Als wischtuch verwendbarer vliesstoff, herstellungsverfahren dafür und anlage zu seiner herstellung

Info

Publication number
EP2041345A2
EP2041345A2 EP07803800A EP07803800A EP2041345A2 EP 2041345 A2 EP2041345 A2 EP 2041345A2 EP 07803800 A EP07803800 A EP 07803800A EP 07803800 A EP07803800 A EP 07803800A EP 2041345 A2 EP2041345 A2 EP 2041345A2
Authority
EP
European Patent Office
Prior art keywords
nonwoven
jets
structures
row
distance
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.)
Granted
Application number
EP07803800A
Other languages
English (en)
French (fr)
Other versions
EP2041345B1 (de
Inventor
Frédéric NOELLE
Said Serbi
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.)
Rieter Perfojet SAS
Original Assignee
Rieter Perfojet SAS
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 Rieter Perfojet SAS filed Critical Rieter Perfojet SAS
Priority to PL07803800T priority Critical patent/PL2041345T3/pl
Publication of EP2041345A2 publication Critical patent/EP2041345A2/de
Application granted granted Critical
Publication of EP2041345B1 publication Critical patent/EP2041345B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING 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
    • D04H3/00Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/005Synthetic yarns or filaments
    • D04H3/007Addition polymers
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L13/00Implements for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L13/10Scrubbing; Scouring; Cleaning; Polishing
    • A47L13/16Cloths; Pads; Sponges
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING 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
    • D04H18/00Needling machines
    • D04H18/04Needling machines with water jets
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING 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
    • D04H3/00Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/10Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically
    • D04H3/11Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically by fluid jet
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24273Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture

Definitions

  • the present invention relates to nonwovens having outstanding electrostatic characteristics, to their methods of manufacture and to their use as dry wiping cloths. It is known to produce nonwovens used as wiping cloths having complex structures, for example at least one web of continuous filaments hydroentangled with a sheet of thermoplastic staple fibers. This nonwoven has a high mechanical strength thanks to the properties of the filament layers incorporated. In addition, these nonwovens subjected to corona discharge have a reduced decline in surface potential over time, which explains their good electrostatic quality and their use as wiping cloths (EP 1 275 764).
  • the invention therefore relates to the use of a polypropylene filament spunbond nonwoven structured with structures of 1 to 3 mm in diameter at a structuring rate indicative of the ratio of the structured surface area to the total area of 20. at 60%, the interval between the structures, defined by the distance between the centers of the structures, being between 3 and 5 mm as wiping cloth.
  • the nonwoven has a tensile strength in a first direction, namely the machine direction, preferably between 100 and 150 N / 50 mm. between 110 and 130 N / 50 mm and in a second direction perpendicular to the first direction, therefore the cross direction, between 80 and 120 N / 50 mm, preferably between 90 and 110 N / 50 mm.
  • the nonwoven has an elongation of 80 to 140% / 10 N.
  • the nonwoven has a surface potential decline between 100 and 150 V in 600 seconds.
  • the filaments preferably have a denier of between 1.8 and 2 and 2.2 and more preferably between 1.9 and 2.1.
  • the nonwoven has a basis weight of 30 to 60 g / m 2 and in particular 40 to 50 g / m 2 .
  • the structures are openings.
  • the subject of the invention is also a method for producing a nonwoven in which: a spunbond web of polypropylene filaments is prepared, the web is consolidated by hydrolysis by the action of water jets on one of its faces at a jet pressure of 80 to 120 bar, preferably from 90 to 110 bar, in a consolidated layer, the consolidated sheet is formed by the action of jets of water on the other face of the sheet at a pressure of 180 to 220 bars, preferably from 190 to 210 bars, from a three-jet jet injector with a diameter of 100 to 140 ⁇ m, preferably from 110 to 130 ⁇ m, the gaps between the jet outlet orifices in a the same row being between 0.5 and 1.5 mm, the distance between the straight line passing through the centers of the outlets of a row and the straight line passing through those of a neighboring row being between 0.25 and 1.2
  • the invention also relates to an installation comprising a spunbond tower, the bundle of filaments being extruded, stretched and deposited on a conveyor belt, sending a sheet to a consolidation device by jets of water projected on one of the faces of the web to obtain a consolidated web itself sent to a structuring device, including an adjoining device, by jets of water.
  • the structuring device is arranged to project jets on the other side of the consolidated sheet and comprises three rows of jets with a diameter of 100 to 140 ⁇ m, preferably 110 to 130 ⁇ m, the intervals between the outlets of the jets in the same row being between 0.5 and 1.5 mm, the distance between the straight line passing through the centers of the outlets of a row and the line passing through those of a neighboring row being between 0.25 and 1.2 mm and the distance between the perpendicular to said straight line of a row passing through one of its orifices and the perpendicular to said straight line of a neighboring row passing through the orifice closest to said orifice is between 0.25 and 0.75 mm and
  • the nonwoven thus obtained is dried in a through air oven and is received on a winding device.
  • the rate of passage of the nonwoven in the installation mainly in front of the adjoining station is between 20 and 60 m per minute, preferably between 20 and 50 m per minute. Too high a speed can prevent getting the openings.
  • the invention finally relates to a nonwoven as defined for the nonwoven used as a dry cleaning cloth according to the invention.
  • the openings are preferably free of filaments passing therethrough.
  • the gaps between the openings are free of loop surface formed of filament.
  • the invention also relates to a wiping process which consists in wiping a surface with the aid of a nonwoven according to the invention.
  • the wiper according to the invention can be used, in particular, for dry wiping of all surfaces, in particular metal, plastic, ceramic, glass, fabric, as follows:
  • the sample is conditioned for 24 hours and the test is carried out at 23 ° C. and at a relative humidity of 50%.
  • the thickness of the nonwoven is measured by measuring the distance between a reference plate on which the nonwoven is based and a parallel pressure plate which applies a precise pressure to the surface under test.
  • the apparatus consists of two circular horizontal plates attached to a frame. The top plate moves vertically. It has a surface of about 2500 m 2 .
  • the reference plate has a flat surface with a diameter greater than 50 mm greater than that of the top plate.
  • Equipment is provided for vertically suspending the test piece between the two trays.
  • the test piece has dimensions of 180 x 180 mm plus or minus 5 mm for width and length. There is provided a device for measuring the distance between the plates when they are close to the point of applying a pressure of 0.02 kpa. b) Resistance and elongation in the long direction and in the cross direction
  • a sample is conditioned for 24 hours and the test is carried out at 23 ° C. and at a relative humidity of
  • a dynamometer comprising a set of fixed jaws and a set of movable jaws moving at a constant speed is used for the test.
  • the jaws of the dynamometer have a useful width of 50 mm.
  • the dynamometer is equipped with a logger which allows to draw the curve of the tractive force according to elongation.
  • Five samples of 50 ⁇ m, plus or minus 0.5 mm in width and 250 mm in length are cut, in the long direction and in the cross direction of the nonwoven. The samples are tested one by one, at a constant tensile speed of 100 mm per minute and with an initial distance between jaws of 200 mm.
  • the dynamometer records the curve of the tensile force in Newtons as a function of elongation.
  • a sample is conditioned for 24 hours and the test is carried out at 23 ° C. and a relative humidity of 50%.
  • a dynamometer comprising a set of fixed jaws and a set of movable jaws moving at a constant speed is used for the test.
  • the jaws of the dynamometer have a useful width of 50 mm.
  • the dynamometer is equipped with a logger which allows to draw the curve of the tensile force according to the displacement of the movable jaws.
  • 5 samples of 75 mm plus or minus 1 mm in width and 150 mm plus or minus 2 mm in length are cut in the long direction and in the cross direction of the nonwoven. The long side of 150 mm is cut in the direction of the machine direction or through to be tested.
  • Two oblique lines defining an isosceles trapezium of 25 mm of base per 100 mm of base and 75 mm of height are drawn and whose bases are centered at 75 mm from the edges of the test pieces.
  • a small cut of 5 mm is made using scissors in the center of the base of 25 mm of each trapeze. This notch is intended to initiate the tear during testing.
  • Samples are tested one by one.
  • the jaws of the dynamometer are placed at an initial distance of 25 mm.
  • the sample is placed between the jaws so that the small base of the trapezium slightly tense and the base of the trapezium is relaxed.
  • a sample is conditioned for 24 hours and the test is carried out at 23 ° C. and at a relative humidity of 50%.
  • At least 3 samples of an area of at least 50,000 mm 2 are cut with a cutting apparatus known as a cutter.
  • the decline of the surface potential is measured as follows.
  • the measurement of the surface potential decline is carried out in two steps: a) deposition of ions (positive or negative) on the surface of the material, b) measurement of the potential at the surface of the material and recording of this potential over time.
  • Step 1 A DC voltage greater than or equal to ⁇ 3 KV is applied to a needle from a high voltage power supply. This makes it possible to ionize the air in the vicinity of the needle. We talk about corona discharge.
  • the setpoint applied to this fixed grid the amount of ions deposited (e.g., if a voltage is applied Vdec h a r g e on the grid, the amount of ions is deposited on the surface gives an equivalent voltage value on the surface of the material equal to V d e C h ar g e -
  • the ions generated by corona discharge pass through the gate and will deposit on the surface of the material until the potential on this surface reaches the value of
  • the other advantage of this grid is that it makes it possible to homogenize the distribution of ions on the surface of the material.
  • Step 2 once the ions have been deposited, they represent an "equivalent" voltage on the surface, which is called the surface potential.
  • a non-contact electrostatic probe positioned a few mm above the material, makes it possible to measure this surface potential.
  • This electrostatic probe is connected to an electrostatic voltmeter whose analog output is connected to a computer that records the potential value as a function of the time that has elapsed after depositing the ions.
  • the complete system consists of a motorized turntable (stepper motor) with 4 sample holders.
  • the displacement of the sample holder from the discharge station to the measurement station is thus automated and the speed of movement is controlled.
  • the application of the duration and the voltage of the corona discharge is also automated.
  • the whole is driven by a program.
  • the device is installed in an enclosure climate, which makes it possible to perfectly control the desired temperature and relative humidity conditions.
  • the sample holder is grounded, which means that the back of the sample is also in contact with the ground.
  • FIG. 1 is a schematic sectional view of an installation according to the invention
  • FIG. 2 is a diagram illustrating the respective position of the jet outlet orifices of the first injector of FIG. 3 is a diagram identical to that of FIG. 2 relating to the second perforation injector downstream of the first (10)
  • FIG. 4 is a plan view of a nonwoven perforated next the invention.
  • Figure 5 is the curve of decline of the surface potential of the nonwoven according to the example.
  • Figure 1 shows an installation according to the invention. It comprises a conventional spunbond tower 1 providing on a conveyor belt 2 a nonwoven N which passes on two drums 4 and 5 and then on a drum 6 of drying.
  • FIG. 2 illustrates the position of the orifices of the jets of water on the injector 9. They are in a row at an interval of the same size d3 as in the injectors 7 and 8, and preferably at an identical interval.
  • the distance between two adjacent outlets of the jets of the injector 10 is denoted d1 in FIG. 3.
  • the distance between the perpendiculars to the two straight lines passing through the respective centers of two adjacent rows is denoted by d2 in FIG. perpendicular to the two straight lines passing through two adjacent holes in one row and the other.
  • a first row Ra a second row Rb and a third row Rc of orifices, three of them being represented in each row.
  • the row Ra thus has orifices 11, 12 and 13, the row Rb of the orifices 14, 15 and 16 and the row Rc of the orifices 17, 18, 19.
  • orifices 11, 12, 13 pass through the same straight line
  • the centers of the orifices 14, 15, 16 pass through another same straight line parallel to the first and the same applies to the orifices 17, 18, 19.
  • the distance between the center of an orifice 11 and that of its neighbor orifice 12 is denoted dl.
  • d1 is between 0.60 and 0.90 mm, while d2 is between 0.15 and 0.35 mm.
  • the diameter of the orifices is between 100 and 140 ⁇ m and, preferably, it is 120 ⁇ m.
  • a sheet of continuous filament PP of 2 deniers is subjected to the action of jets of water on an installation corresponding to FIG. 1, the speed of the jets of water is 50 m / minute, the pressure of the jets of water on the injectors 7 and 8 is 100 bar, the pressure of the water jets on the injectors 9 and 10 is 200 bar.
  • the nonwoven obtained is dried at a temperature of 120 ° C. in a through-air oven.
  • the thickness is 0.8 mm
  • the nonwoven is very soft and has a potential decline of 140 V / in 600 s.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
EP07803800A 2006-07-07 2007-06-28 Als wischtuch verwendbarer vliesstoff, herstellungsverfahren und anlage zu seiner herstellung Active EP2041345B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07803800T PL2041345T3 (pl) 2006-07-07 2007-06-28 Włóknina stosowana jako ściereczka do wycierania oraz sposób jej wytwarzania i urządzenie do jej wytwarzania

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0606213A FR2903426B1 (fr) 2006-07-07 2006-07-07 Non-tisse utilise comme chiffon d'essuyage,son procede et son installation de production.
PCT/FR2007/001091 WO2008003847A2 (fr) 2006-07-07 2007-06-28 Non-tisse utilise comme chiffon d'essuyage, son procede et son installation de production

Publications (2)

Publication Number Publication Date
EP2041345A2 true EP2041345A2 (de) 2009-04-01
EP2041345B1 EP2041345B1 (de) 2010-01-27

Family

ID=37533240

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07803800A Active EP2041345B1 (de) 2006-07-07 2007-06-28 Als wischtuch verwendbarer vliesstoff, herstellungsverfahren und anlage zu seiner herstellung

Country Status (9)

Country Link
US (1) US20090320878A1 (de)
EP (1) EP2041345B1 (de)
CN (1) CN101490327B (de)
AT (1) ATE456694T1 (de)
DE (1) DE602007004617D1 (de)
ES (1) ES2336853T3 (de)
FR (1) FR2903426B1 (de)
PL (1) PL2041345T3 (de)
WO (1) WO2008003847A2 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2410317A1 (de) * 2010-07-13 2012-01-25 Krämer AG Bassersdorf Verfahren zum Beurteilen von an einem Körper anhaftenden Partikeln
CN102061571B (zh) * 2010-12-17 2012-09-26 多氟多化工股份有限公司 静电纺丝及水刺固结复合制膜装置
JP5712195B2 (ja) * 2012-12-04 2015-05-07 花王株式会社 拭き取りシート用不織布基材
JP5712194B2 (ja) * 2012-12-04 2015-05-07 花王株式会社 拭き取りシート用不織布基材

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0737702B2 (ja) * 1986-12-31 1995-04-26 ユニ・チヤ−ム株式会社 開孔模様を有する不織布
US6573205B1 (en) * 1999-01-30 2003-06-03 Kimberly-Clark Worldwide, Inc. Stable electret polymeric articles
JP3662455B2 (ja) * 1999-11-22 2005-06-22 ユニ・チャーム株式会社 ポリプロピレン製不織布およびその製造方法
US6736916B2 (en) * 2000-12-20 2004-05-18 Kimberly-Clark Worldwide, Inc. Hydraulically arranged nonwoven webs and method of making same
US6420024B1 (en) * 2000-12-21 2002-07-16 3M Innovative Properties Company Charged microfibers, microfibrillated articles and use thereof
FR2827313B1 (fr) * 2001-07-10 2004-03-12 Rieter Perfojet Non tisse comprenant une nappe en filaments continus, son procede de fabrication et son application en tant que chiffon d'essuyage
WO2003060215A1 (en) * 2002-01-09 2003-07-24 Polymer Group Inc. Hydroentangled continuous filament nonwoven fabric and the articles thereof
US20040010894A1 (en) * 2002-07-17 2004-01-22 Avgol Ltd. Method for making a hydroentangled nonwoven fabric and the fabric made thereby
US20040121121A1 (en) * 2002-12-23 2004-06-24 Kimberly -Clark Worldwide, Inc. Entangled fabrics containing an apertured nonwoven web

Non-Patent Citations (1)

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Title
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Also Published As

Publication number Publication date
PL2041345T3 (pl) 2010-07-30
WO2008003847A3 (fr) 2008-02-21
DE602007004617D1 (de) 2010-03-18
EP2041345B1 (de) 2010-01-27
CN101490327B (zh) 2011-05-11
ATE456694T1 (de) 2010-02-15
CN101490327A (zh) 2009-07-22
WO2008003847A2 (fr) 2008-01-10
FR2903426B1 (fr) 2008-09-12
FR2903426A1 (fr) 2008-01-11
US20090320878A1 (en) 2009-12-31
ES2336853T3 (es) 2010-04-16

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