EP1162292A1 - Fibres en polyoléfines ayant des caractéristiques hydrophiles élevées et permanentes et procédé pour leur extrusion et filage - Google Patents

Fibres en polyoléfines ayant des caractéristiques hydrophiles élevées et permanentes et procédé pour leur extrusion et filage Download PDF

Info

Publication number
EP1162292A1
EP1162292A1 EP00830374A EP00830374A EP1162292A1 EP 1162292 A1 EP1162292 A1 EP 1162292A1 EP 00830374 A EP00830374 A EP 00830374A EP 00830374 A EP00830374 A EP 00830374A EP 1162292 A1 EP1162292 A1 EP 1162292A1
Authority
EP
European Patent Office
Prior art keywords
mixture
extrusion
spinning
die
heated
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.)
Withdrawn
Application number
EP00830374A
Other languages
German (de)
English (en)
Inventor
Rina Maria Sciuccati
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.)
Oms Impianti Srl
Original Assignee
Oms Impianti Srl
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 Oms Impianti Srl filed Critical Oms Impianti Srl
Priority to EP00830374A priority Critical patent/EP1162292A1/fr
Publication of EP1162292A1 publication Critical patent/EP1162292A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
    • D01F6/46—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyolefins
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D1/00—Treatment of filament-forming or like material
    • D01D1/06—Feeding liquid to the spinning head
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D1/00—Treatment of filament-forming or like material
    • D01D1/06—Feeding liquid to the spinning head
    • D01D1/09—Control of pressure, temperature or feeding rate
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
    • D01F6/90—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyamides

Definitions

  • the present invention relates to polyolefin fibers having high and permanent hydrophile properties and the related process of extrusion and spinning thereof.
  • the present invention relates to polyolefin fibers having high and permanent hydrophile properties, suitable to be used in the health sector for the production of sanitary napkins and in the technical sector for works carried out with extremely quick cards.
  • sanitary napkin as used in the present invention and the claims, there is intended to indicate any porous structure having a high absorbing capacity, in the form of tampons, towels, diapers and the like, generally used for intimate hygiene of women, newborn babies, and those affected by incontinence.
  • napkins are constituted of an inner absorbent layer, generally made from cellulose fibers, and a covering external gauze or nonwoven fabric.
  • the properties required of such gauze or nonwoven fabric are those of being soft, absorbent and non-irritating, of insulating the inner layer, keeping dry the skin of the user with which it in contact.
  • Polyolefin fibers allow to obtain all these properties, which is why they are widely used for this purpose.
  • Object of the present invention is to obviate such drawback.
  • object of the present invention is to provide a polyolefin fiber suitable for the production of gauze or nonwoven fabric for napkins which, besides being soft, hydrophile and not irritating, gives users a permanent sensation of dryness even after a long period of use and contact with the internal wet layer.
  • a further object of the present invention it to provide an extrusion and spinning process such as to allow to markedly increase the production power of each extruding unit, up to values exceeding 100 kg/h, with remarkable savings of energy and fabrication costs.
  • the polyamide contents in the mixture is not critical for the purposes of the present invention; it may range from 5 to 50% by weight and preferably from 15 to 45% by weight based on the mixture.
  • polyolefin as used in the present description and the claims, comprises polyethylene and thermoplastic copolymers thereof, polypropylene and thermoplastic copolymers thereof, and mixtures of polyethylene, polypropylene and/or copolymers thereof, in any mutual ratios.
  • Polypropylene and in particular the high fluidity one for extrusion, is preferred.
  • This type of polypropylene is available on the market, for instance by the commercial names FINAPRO PPH 10069S and PPH 10080, produced and sold by the FINA Chemicals company. They have a Melt Flow Index of 35 g/min, as determined according to the norm ASTM D 1238, and a melting temperature range of 160-165°C.
  • any known polyamide may be used for the production of the fibers of the present invention.
  • a second aspect of the present invention is the extrusion and spinning process that allows to obtain fibers starting from the polyolefin-polyamide mixture, at a high spinning speed and to very contained costs.
  • Such process is characterized in that the polyolefin-polyamide mixture at the molten state, before the extrusion ⁇ through the holes of a die of a spinning head, is mixed in a diffusion chamber comprising a set of prismatic elements, symmetrically arranged with respect to each other, filled with diathermic oil and heated to a temperature higher than the melting temperature of the mixture by at least 10°C, and in that the spinning heads are arranged in a closed box filled with diathermic oil, and heated to a temperature than the temperature of mixture melting higher by at least 10°C.
  • the process of extrusion through the holes of a die and of spinning of the present invention comprises sequentially the following steps:
  • the heating of the prismatic elements and the spinning heads is carried out with resistors arranged in their inside.
  • the polyolefin-polyamide mixture in the form of grains coming from a mixer is loaded in a hopper and pushed by the pump first in am accumulation chamber, afterwards towards the outlet wherein the dies are located, passing through a melting chamber and a diffusion chamber.
  • the cylinders of the feeding pump have preferably a diameter of 450 mm and a length of 1000 mm.
  • the arrangement of the cylinders of the feeding pump, perpendicular to the axis of the die holes, allows to uniformly distribute the pressure on the whole length of the die.
  • prismatic elements in the diffusion chamber allows to reduce the mass to be heated markedly.
  • Each of these elements is filled with diathermic oil and contains in its inside a tubular resistor having a very small diameter compared with the internal one of each element.
  • the various prismatic elements are closed in a box filled with diathermic oil, so that the diffusion chamber will be entirely full of oil in its inside. Resistors heat oil and the latter transmits simultaneously the heat to the parts forming the diffusion chamber. This involves a remarkable energy saving to heat the entire diffusion chamber.
  • a length of the pump cylinders of about 1000 mm allows to use an extruding unit formed by 19 spinning heads and therefore 10 dies.
  • Each die can have a useful work section of 20,000 mm 2 , allowing a better cooling of the filaments for the subsequent crystallization.
  • Each spinning head can also have a useful work section of 20,000 mm 2 .
  • Each spinning head comprises, in the feed direction of the polymer:
  • the prismatic and cylindrical ducts having different diameters have the function of compressing and expanding the molten material, so that the current of parallel flow in the direction of the die tends to expand in each cylinder, creating an internal turbulence that contributes to a better mixing of the mixture components.
  • Each mixer is drilled in the inside to allow the passage of diathermic oil in its inside.
  • Diathermic oil is heated by tubular resistors. This contrivance allows to markedly reduce energy consumption for the heating of all the extrusion heads.
  • each extruding unit is contained in a sealed box filled with diathermic oil heated by resistors located in the inside of said box.
  • the extrusion and spinning process of the present invention can be applied with the same success for the production of fibers from mixtures of a polyamide with polypropylene, copolymers or mixes thereof, in any ratio by means of a simple adjustment of work temperature and change of dies.
  • the process of the present invention allows to reach yields of 300 kg/h of polymer, each extruding unit being formed by ten dies, and the yield of each die can be of 30 kg/h, with a title range that oscillate between 1 and 150 deniers.
  • the extrusion and spinning process for the production of polyolefin fibers of the present invention consists essentially in the introduction of the polyolefin-polyamide mixture, already produced in a mixer and in the form of grains, into a hopper (1) provided with a feeding or extruding pump constituted of two parallel, grooved, cooperating, rotary cylinders (2), arranged perpendicularly to the axis of the holes of the dies.
  • Each cylinder (2) has preferably a diameter of 450 mm and a length of 1000 mm.
  • the rotation sense of the cylinders (2) is the one marked with harrows in Figure 2 and their surface is grooved with such a form that, by working in synchrony with each other, it causes grains to be first pushed towards the melting chamber, and afterwards towards the die for the extrusion.
  • the mixture is pushed by the feeding pump to an accumulation chamber (3), having preferably a truncated trapezoid section, wherein the grain mixture is compressed, and the pressure accumulates that is necessary to cause the material, molten in the melting chamber, to come out from the holes of a die (10).
  • the mouth of the accumulation chamber (3) can be of 450,000 mm 2 and its base of about 500,000 mm 2 .
  • the grains of the mixture are pushed by the feeding pump into the subsequent melting chamber comprising resistors (5) homogeneously distributed in its inside.
  • the melting chamber is heated to a temperature preferably comprised between 280 and 340°C.
  • the melting chamber has a mouth of 500,000 mm 2 .
  • the molten mix passes into the subsequent diffusion chamber comprising a plurality of elements having a prismatic shape (6) symmetrically arranged with respect to each other.
  • These prismatic elements (6) are filled with diathermic oil and contain a resistor (7).
  • Said prismatic elements (6) are contained in a sealed box (12) heated in its inside with resistors (7). This structure of the diffusion chamber allows to obtain a better distribution of heat energy and a remarkable energy saving.
  • the diffusion chamber is heated to a temperature preferably comprised between 230 and 300°C.
  • the molten mixture is distributed through distribution means (8) towards the spinning heads (9).
  • Each distribution means (8) is connected to a spinning head.
  • Each extruding unit contains 10 spinning heads (9), having each a useful work section of 20,000 mm 2 , allowing thereby a better cooling of the filaments.
  • the spinning heads (9) are contained in a sealed box (13) filled with diathermic oil heated by resistors (11).
  • the spinning heads are heated to a temperature preferably comprised between 220 and 280°C.
  • each spinning head (9) comprises sequentially: a first drilled plate (14), a mixer (15), a second drilled head (16), a false die (17), and the die (10).
  • the first drilled head (14) has the task of distributing the pressure and the molten material coming from the diffusion chamber before entering the mixer (15).
  • a mixer (15) comprises several prismatic ducts (18) having a rectangular section and other ones having a cylindrical section circumscribed by drilled separators for the passage of diathermic oil into their inside, so as to distribute temperature uniformly and save much electric energy.
  • the drilled plates (14, 16) and mixer (15) are arranged in a sealed box (13), filled with diathermic oil and heated by means of resistors (11). With this system, a better homogenization of the components of the mixture and a better distribution of heat in the molten mass, with ensuing energy saving, are achieved.
  • the second drilled plate (16) is like the first one (14) and has the task of improving pressure distribution.
  • the false die and the die are of a known type and selected depending on the polymer to be spun and extruded and the type of fiber desired.
  • Each die is heated to a temperature preferably comprised between 210 and 270°C.
  • Each extruding unit can bear 10 dies with a maximum yield per die of 30 kg/h; to total maximum yield per extruding unit is therefore of 300 kg/h.
  • the expected consumption is of 0.4 kw per each kg of fabricated fiber, starting from a production of 900 kg/h.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
EP00830374A 2000-05-24 2000-05-24 Fibres en polyoléfines ayant des caractéristiques hydrophiles élevées et permanentes et procédé pour leur extrusion et filage Withdrawn EP1162292A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP00830374A EP1162292A1 (fr) 2000-05-24 2000-05-24 Fibres en polyoléfines ayant des caractéristiques hydrophiles élevées et permanentes et procédé pour leur extrusion et filage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00830374A EP1162292A1 (fr) 2000-05-24 2000-05-24 Fibres en polyoléfines ayant des caractéristiques hydrophiles élevées et permanentes et procédé pour leur extrusion et filage

Publications (1)

Publication Number Publication Date
EP1162292A1 true EP1162292A1 (fr) 2001-12-12

Family

ID=8175342

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00830374A Withdrawn EP1162292A1 (fr) 2000-05-24 2000-05-24 Fibres en polyoléfines ayant des caractéristiques hydrophiles élevées et permanentes et procédé pour leur extrusion et filage

Country Status (1)

Country Link
EP (1) EP1162292A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111676534A (zh) * 2020-06-02 2020-09-18 安徽东锦环保科技有限公司 一种功能性聚酯纤维的制备方法
CN115449905A (zh) * 2022-09-02 2022-12-09 新凤鸣集团湖州中石科技有限公司 一步法涤纶40s纺棉生产方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3500500A (en) * 1965-11-13 1970-03-17 Invenplast Sa Apparatus for the extrusion of synthetic plastic material
US3788613A (en) * 1971-04-03 1974-01-29 Profiltex Sa Apparatus for the extrusion of synthetic thermoplastic materials
JPS5566864A (en) * 1978-11-13 1980-05-20 Teijin Ltd Cell separator
FR2541177A1 (fr) * 1983-02-21 1984-08-24 Calvete Capdevila Eugenio Perfectionnement a un groupe d'extrusion pour le filage de matieres thermoplastiques
FR2594857A1 (fr) * 1986-02-21 1987-08-28 Calvete Capdevila Eugenio Dispositif pour tetes d'extrusion de filaments en matieres thermoplastiques
FR2622602A1 (fr) * 1987-10-28 1989-05-05 Calvete Capdevila Eugenio Perfectionnements aux chambres de fusion pour matieres synthetiques thermoplastiques
WO1994017226A1 (fr) * 1993-01-28 1994-08-04 Fiberweb North America, Inc. Procede de production de fibres et de non-tisses a partir de melanges polymeres immiscibles
WO1998027256A2 (fr) * 1996-12-19 1998-06-25 Kimberly-Clark Worldwide, Inc. Alliage de polymeres non miscibles

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3500500A (en) * 1965-11-13 1970-03-17 Invenplast Sa Apparatus for the extrusion of synthetic plastic material
US3788613A (en) * 1971-04-03 1974-01-29 Profiltex Sa Apparatus for the extrusion of synthetic thermoplastic materials
JPS5566864A (en) * 1978-11-13 1980-05-20 Teijin Ltd Cell separator
FR2541177A1 (fr) * 1983-02-21 1984-08-24 Calvete Capdevila Eugenio Perfectionnement a un groupe d'extrusion pour le filage de matieres thermoplastiques
FR2594857A1 (fr) * 1986-02-21 1987-08-28 Calvete Capdevila Eugenio Dispositif pour tetes d'extrusion de filaments en matieres thermoplastiques
FR2622602A1 (fr) * 1987-10-28 1989-05-05 Calvete Capdevila Eugenio Perfectionnements aux chambres de fusion pour matieres synthetiques thermoplastiques
WO1994017226A1 (fr) * 1993-01-28 1994-08-04 Fiberweb North America, Inc. Procede de production de fibres et de non-tisses a partir de melanges polymeres immiscibles
WO1998027256A2 (fr) * 1996-12-19 1998-06-25 Kimberly-Clark Worldwide, Inc. Alliage de polymeres non miscibles

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 004, no. 109 (E - 020) 6 August 1980 (1980-08-06) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111676534A (zh) * 2020-06-02 2020-09-18 安徽东锦环保科技有限公司 一种功能性聚酯纤维的制备方法
CN111676534B (zh) * 2020-06-02 2021-04-20 安徽东锦环保科技有限公司 一种功能性聚酯纤维的制备方法
CN115449905A (zh) * 2022-09-02 2022-12-09 新凤鸣集团湖州中石科技有限公司 一步法涤纶40s纺棉生产方法

Similar Documents

Publication Publication Date Title
DE69530930T2 (de) Thermoverformbares sperrendes vliesstofflaminat
RU2201191C2 (ru) Прокладка с высокой пропускающей способностью, обеспечивающая улучшенное впитывание и распределение
US6642429B1 (en) Personal care articles with reduced polymer fibers
EP1259207B1 (fr) Article d'hygiene absorbant, a usage unique
KR100404288B1 (ko) 저밀도 미세섬유 부직포
KR100460477B1 (ko) 흡수성제품용의,투과도가조화된라이너/흡수성구조체복합체
KR100393863B1 (ko) 니트형부직포복합재료
US4778460A (en) Multilayer nonwoven fabric
DE69307229T2 (de) Vliesstoff aus Polyolefin und Ethylen-alkyl-akrylat-Kopolymere enthaltenden Multikomponenten-Polymere-Strängen
DE69722436T2 (de) Ungestreckte,zähe, dauerhaft schmelzklebende,macrodenier,thermoplastische multikomponentfasern
KR100322360B1 (ko) 형상화된부직포및그의제조방법
DE69631053T2 (de) Wasserabbaubare mehrkomponentenfasern und vliesstoffe
US20040082239A1 (en) Fibers providing controlled active agent delivery
US4973503A (en) Mixed fiber tow or tube and method of making
CN101790604A (zh) 无纺织物及其制造方法
CN103842164A (zh) 结网、阵列和模头及其制备方法
CA2184626A1 (fr) Fibres conjuguees frisees renfermant un agent de nucleation
KR20010031645A (ko) 직접 형성된, 섬유 크기가 불균일한 부직포
CA2129496A1 (fr) Voiles a base de fibres conjuguees en polymere simple de resistance, amelioree
DE3634139C2 (de) Mehrlagen-Vliesstoff
DE10296874B4 (de) Verbundmaterial und dessen Verwendung
DE69108583T2 (de) Absorbierende Platte für Körperflüssigkeit-absorptive Kleider.
KR100668551B1 (ko) 압축된 흡수성 복합물
CA2136575A1 (fr) Fibres conjuguees se pretant au frisage et bandes non tissees fabriquees avec ces fibres
EP1162292A1 (fr) Fibres en polyoléfines ayant des caractéristiques hydrophiles élevées et permanentes et procédé pour leur extrusion et filage

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20020118

AKX Designation fees paid

Free format text: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

17Q First examination report despatched

Effective date: 20020822

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20030102