EP0378957B1 - Procédé de fabrication d'une nappe non tissée, nappe non tissée obtenue par le dit procédé et application de la dite nappe non tissée aux produits d'hygiène absorbants à usage unique - Google Patents

Procédé de fabrication d'une nappe non tissée, nappe non tissée obtenue par le dit procédé et application de la dite nappe non tissée aux produits d'hygiène absorbants à usage unique Download PDF

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Publication number
EP0378957B1
EP0378957B1 EP89440103A EP89440103A EP0378957B1 EP 0378957 B1 EP0378957 B1 EP 0378957B1 EP 89440103 A EP89440103 A EP 89440103A EP 89440103 A EP89440103 A EP 89440103A EP 0378957 B1 EP0378957 B1 EP 0378957B1
Authority
EP
European Patent Office
Prior art keywords
fibers
nap
recited
web
synthetic fibers
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
EP89440103A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0378957A1 (fr
Inventor
Jean-Pierre Bruneau
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.)
Celatose SA
Original Assignee
Celatose SA
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 Celatose SA filed Critical Celatose SA
Priority to AT89440103T priority Critical patent/ATE83808T1/de
Publication of EP0378957A1 publication Critical patent/EP0378957A1/fr
Application granted granted Critical
Publication of EP0378957B1 publication Critical patent/EP0378957B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
    • D04H1/43835—Mixed fibres, e.g. at least two chemically different fibres or fibre blends
    • 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
    • D04H1/04—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres having existing or potential cohesive properties, e.g. natural fibres, prestretched or fibrillated artificial fibres
    • 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
    • D04H1/4282—Addition polymers
    • D04H1/4291—Olefin 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
    • D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
    • 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
    • D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/542—Adhesive fibres
    • D04H1/544—Olefin 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
    • D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/556—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 by welding together the fibres, e.g. by partially melting or dissolving by infrared heating

Definitions

  • the invention relates to a process for manufacturing a nonwoven sheet, as well as to such a nonwoven sheet obtained by said process and an application of said nonwoven sheet to absorbent hygienic products for single use.
  • the present invention will find its application in the textile field of the manufacture of nonwovens as well as in particular in the field of the manufacture of hygienic articles and / or hygienic products for single use such as in particular diapers for babies or incontinence, products of feminine protection, facial care products, cleaning products.
  • the sheet is formed by a mattress of short tangled but nonwoven fibers.
  • the consistency of this layer depends essentially on the entanglement of the cellulosic fibers.
  • said sheet is not subjected to mechanical stresses and gives completely satisfactory results.
  • the nonwoven web is subjected to crushing or tearing forces which disturb the arrangement of the fibers and modify the absorption qualities of the web.
  • the latter articles generally consist of such an absorbent mattress sandwiched between two sheets, one consisting of a waterproof sheet, the other by a permeable veil.
  • the mattress is subjected to forces due to the movements of the wearer which cause the sheet to break and divide, which is detrimental for absorption, since these ruptures cause capillary arrest.
  • the aim of the present invention is to propose a process for manufacturing a nonwoven web, in particular made up of cellulosic fibers, which allows the implementation of a thermobonding using synthetic fibers while reducing the necessary energy consumption, and increasing efficiency as well as security.
  • One of the aims of the present invention is to propose a process for manufacturing a nonwoven web by which a network of fibers linked together is created by fusion of synthetic fibers while not "mechanically” disturbing the web during thermobonding and in which a concentrated heating is carried out mainly at the level of the synthetic fibers in a reduced bulk and at a high speed.
  • the manufacturing process of the present invention makes it possible to increase the efficiency rate of the welding of the fibers together and thus to increase the tear strength and the resistance of the nonwoven web thus produced.
  • Another object of the present invention is to provide a nonwoven sheet, manufactured by said process, which will find its application in particular to the production of absorbent mattresses of disposable hygiene products such as in particular diapers for babies or incontinence, products feminine protection, facial care products, cleaning products, thus very significantly improving the absorption rate and the effectiveness of these articles.
  • the invention relates to a method of manufacturing a nonwoven sheet, consisting at least of a mixture of absorbent fibers and synthetic fibers, as well as such a sheet and its application to the production of absorbent mattresses of hygienic products for single use, hygienic feminine protective articles, diapers for babies or incontinence, absorbent pads for facials or other hospital uses, cleaning products.
  • a nonwoven formed of cellulosic fibers obtained from defibrated cellulose wadding is produced.
  • thermobonding the fibers together For this, a consistency is given to the nonwoven web by thermobonding the fibers together.
  • a homogeneous mixture of cellulosic fibers obtained by any traditional process such as dry defibration of cellulose wadding, and synthetic fibers is produced in order to form a sheet.
  • Long fibers are preferably used for the cellulose wadding and short fibers for the synthetic fibers and a preferential arrangement of the fibers is produced.
  • the cellulose fibers when the fibers are mixed and the sheet is formed, the cellulose fibers at least are oriented relatively to each other. This orientation will be such that the capillarity of the sheet thus formed is favored.
  • the said sheet of fibers thus formed is subjected to the effect of microwave radiation, not mechanically disturbing for the orientation of the fibers; that is to say that, unlike forced air heating techniques, the fibers are not subjected to any force displacing the fibers relatively between them.
  • the synthetic fibers are melted to bond together the cellulosic fibers in order to create a compact network of good tear resistance, good resilience in which the fibers are contained and maintained and whose absorption is improved thanks to the orientation and the bonding of the fibers together.
  • microwave radiation it is not no longer necessary to raise the temperature significantly, as is the case with hot pulsed air or infrared radiation, to obtain fusion; on the contrary, the heating is done punctually at the level of the synthetic fibers through the molecular agitation caused by the microwaves. This limits the hot spots in the water table.
  • Another important point of the process of the present invention lies in the fact that safety is increased because any risk of fire and explosion is minimized, given the flammable and deflagrating nature of the materials treated and in particular cellulosic fibers.
  • these synthetic fibers are dispersed so as to obtain a constant and homogeneous concentration in the three dimensions of the sheet and in particular in its thickness.
  • synthetic fibers of polyolefin type are used which are, for example, in the form of polyethylene treated, depending on the hydrophilic or hydrophobic case.
  • polypropylene fibers ethylene-propylene copolymer, ethylene-alpha olefin copolymer.
  • These fibers can be added either before defibering the cellulose wadding, or after this defibering.
  • the polyolefin fibers are then milled at the same time as the cellulose wadding until particles of between 0 and 40 mm are obtained.
  • the synthetic fibers and the cellulose fibers are mixed after grinding the latter, the fibers having dimensions ranging from 0 to 40 mm also.
  • the sheet of mixed fibers is then passed through a microwave dryer at least equipped with a fixed microwave emission source and means of linear scrolling of said sheet in the microwave field.
  • Such a device is advantageous for the manufacture of a sheet since it is possible to envisage linear speeds of travel of the sheet ranging up to 150 m / min or even more.
  • microwave dryer for example, we use a type of microwave dryer, known from the prior art, in which the wave is progressive, that is to say sent and then damped at the end, or uses a resonant wave system in which the transmitted wave travels back and forth.
  • the microwave emission will advantageously be done longitudinally, with respect to the movement of the tablecloth in order to guarantee the homogeneity of the "cooking".
  • the sheet thus obtained will have very good mechanical strength and will be advantageously used for the production of the absorbent mattress of any disposable hygiene article such as hygienic article and / or diaper for babies or incontinence.
  • the first being produced by a permeable comfort veil
  • the second generally consisting of a liquid-tight sheet such as a polyethylene film.
  • the use of the sheet produced by the process of the present invention is advantageous for such absorbent articles since the performance of the product is appreciably increased in terms of retention and absorption by the constitution of the network of fibers linked between them, and capillary breaks are avoided by mechanical destruction, that is to say by separation of the fibers. Finally, the resilience of the mattress is such that it contributes to the improvement of absorption.
  • the nonwoven product obtained will make it possible to avoid the use of a complementary nonwoven commonly called a "fabric" surrounding the sheet of absorbent material.
  • the constitution of such a network makes it possible to advantageously fix in position in the three dimensions other elements inside the sheet, such as super-absorbent for example. This fact makes it possible to improve the absorption and retention characteristics, in terms of statistical average value of performance in particular.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Nonwoven Fabrics (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Laminated Bodies (AREA)
  • Treatment Of Fiber Materials (AREA)
EP89440103A 1989-01-19 1989-10-02 Procédé de fabrication d'une nappe non tissée, nappe non tissée obtenue par le dit procédé et application de la dite nappe non tissée aux produits d'hygiène absorbants à usage unique Expired - Lifetime EP0378957B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89440103T ATE83808T1 (de) 1989-01-19 1989-10-02 Verfahren zur herstellung einer nicht gewebten bahn, eine nach diesem verfahren hergestellte bahn und verwendung dieser bahn fuer absorbierende hygieneprodukte zur einmaligen verwendung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8900976 1989-01-19
FR8900976A FR2642770B1 (fr) 1989-01-19 1989-01-19 Procede de fabrication d'une nappe non tissee, nappe non tissee obtenue par ledit procede et application de ladite nappe non tissee aux produits d'hygiene absorbants a usage unique

Publications (2)

Publication Number Publication Date
EP0378957A1 EP0378957A1 (fr) 1990-07-25
EP0378957B1 true EP0378957B1 (fr) 1992-12-23

Family

ID=9378137

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89440103A Expired - Lifetime EP0378957B1 (fr) 1989-01-19 1989-10-02 Procédé de fabrication d'une nappe non tissée, nappe non tissée obtenue par le dit procédé et application de la dite nappe non tissée aux produits d'hygiène absorbants à usage unique

Country Status (6)

Country Link
EP (1) EP0378957B1 (enrdf_load_stackoverflow)
AT (1) ATE83808T1 (enrdf_load_stackoverflow)
DE (2) DE378957T1 (enrdf_load_stackoverflow)
ES (1) ES2020500T3 (enrdf_load_stackoverflow)
FR (1) FR2642770B1 (enrdf_load_stackoverflow)
GR (1) GR3007444T3 (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR9105819A (pt) * 1990-07-27 1992-08-25 Royce Ag Saco de absorcao de agua
WO2007143019A2 (en) * 2006-05-31 2007-12-13 Dow Global Technologies Inc. Additives for the use of microwave energy to selectively heat thermoplastic polymer systems

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3976074A (en) * 1975-08-08 1976-08-24 Colgate-Palmolive Company Absorbent article
US4357188A (en) * 1979-10-22 1982-11-02 Mitsubishi Rayon Co., Ltd. Method for manufacturing cigarette filters
US4486485A (en) * 1983-08-24 1984-12-04 Burlington Industries, Inc. Nonwoven textile structures with reversible stretch
DE3541830A1 (de) * 1985-11-27 1987-06-04 Hartmann Paul Ag Wattetupfer und verfahren zu deren herstellung

Also Published As

Publication number Publication date
FR2642770A1 (fr) 1990-08-10
FR2642770B1 (fr) 1994-03-25
ES2020500T3 (es) 1993-06-01
ES2020500A4 (es) 1991-08-16
DE378957T1 (de) 1991-08-14
DE68904064D1 (de) 1993-02-04
DE68904064T2 (de) 1993-07-15
GR3007444T3 (enrdf_load_stackoverflow) 1993-07-30
ATE83808T1 (de) 1993-01-15
EP0378957A1 (fr) 1990-07-25

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