EP1730334A1 - Polypropylene monofilaments with improved properties - Google Patents

Polypropylene monofilaments with improved properties

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Publication number
EP1730334A1
EP1730334A1 EP05742619A EP05742619A EP1730334A1 EP 1730334 A1 EP1730334 A1 EP 1730334A1 EP 05742619 A EP05742619 A EP 05742619A EP 05742619 A EP05742619 A EP 05742619A EP 1730334 A1 EP1730334 A1 EP 1730334A1
Authority
EP
European Patent Office
Prior art keywords
monofilaments
polypropylene
abrasion
equal
weight
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Withdrawn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
EP05742619A
Other languages
German (de)
French (fr)
Inventor
Claudia Fritz
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.)
Rhodia Chimie SAS
Original Assignee
Rhodia Chimie 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 Rhodia Chimie SAS filed Critical Rhodia Chimie SAS
Publication of EP1730334A1 publication Critical patent/EP1730334A1/en
Withdrawn legal-status Critical Current

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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
    • D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D01F6/04—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyolefins
    • D01F6/06—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyolefins from polypropylene
    • 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
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D10B2321/02—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins
    • D10B2321/022—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins polypropylene
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber

Definitions

  • the present invention relates to polypropylene-based monofilaments having improved properties, including improved abrasion resistance, a method of making these monofilaments and their use.
  • the invention relates more particularly to polypropylene-based monofilaments obtained from a polypropylene having a melt viscosity index (MFI) 230 ° C / 2.16 kg less than or equal to 1.9 g / 10 min.
  • MFI melt viscosity index
  • Two-dimensional polypropylene textile articles are of great interest, as chemically and mechanically resistant filtration media, for filtration in the chemical, pharmaceutical and food industries.
  • Monofilaments of pure polypropylene have the disadvantage of forming a lot of dust due to the low resistance of this substance to abrasion during the weaving process.
  • I ⁇ P-A2-0 784 107 cites monofilaments spun in the molten state, of polyamide, polyester or polypropylene, intended for the fabrics of paper machines and for the threads of edge cutters.
  • abrasion resistant monofilaments are obtained using 70 to 99% by weight of fibrogenic polymer and 1 to 30% by weight of a polyethylene / polypropylene rubber, modified with maleic anhydride. , and other additives.
  • the examples are however limited, as far as the fibrogenic polymer is concerned, to polyamide 6 and to polyethylene terephthalate, as well as to a copolyamide of PA66 and PA6. Spinning speeds are not specified.
  • EP-A-1059370 a process is also known for manufacturing polypropylene multifilaments intended for textile applications.
  • the starting material used is an isotactic polypropylene, catalyzed by a metallocene, whose melt viscosity index is greater than 19 g for 10 minutes.
  • 2 dpf deniers per fiber
  • Yet another problem consists in making available the use of monofilaments, having good abrasion resistance, for the manufacture of two-dimensional technical articles, in particular intended for filtration.
  • the problem is solved according to the invention in particular through the use, for the manufacture of monofilaments, of a polypropylene having a melt viscosity index (MFI) 230 ° C / 2.16 kg less than or equal to 1.9 g / 10 min.
  • the polypropylenes conventionally used in the manufacture of monofilaments are isotactic polypropylenes.
  • the monofilaments of the invention advantageously have an abrasion less than or equal to 0.014%.
  • the abrasion of the monofilaments is determined by gravimetric measurement of the quantity of down produced during the manufacture of a length of fabric of 300 m, according to the method described below in the experimental part.
  • the abrasion value corresponds to the result of the formula described below in the experimental part, calculated for a fabric length of 300 m.
  • the monofilaments have an abrasion of less than 0.014%.
  • irregularities can occur during weaving, due to too rapid fouling of the combs. This may require shortening the intervals between cleanings, which decreases the productivity of the loom.
  • the monofilaments of the invention preferably have an abrasion less than or equal to 0.01%. It is appropriate that the monofilaments have a resistance of at least
  • the monofilaments of the invention advantageously have a mechanical constant greater than or equal to 285cN / tex.
  • the monofilaments comprise an additive.
  • the monofilaments advantageously comprise from 0.01 to 20% by weight of additive relative to the weight of polypropylene.
  • it is appropriate to use as an additive a polypropylene / polyethylene copolymer having a melting point> 140 ° C.
  • this additive is present in a proportion of 1 to 20% by weight relative to the weight of polypropylene.
  • the invention also relates to a method for manufacturing the monofilaments of the invention, comprising the steps of spinning polypropylene in the melt by extrusion, drawing and winding.
  • the polypropylene-based monofilaments of the invention can be obtained from conventional spinning methods. They are generally obtained by melt spinning by extrusion, cooling in a water bath when the titer of the monofilaments is greater than or equal to 0.05mm, drawing and winding.
  • the additive is generally added to the polypropylene upstream of an extruder before spinning.
  • the monofilaments according to the invention are particularly suitable for the manufacture of two-dimensional technical articles, and in particular for the manufacture of such articles in the field of filtration.
  • These articles, when they are intended for filtration, in particular in the chemical, pharmaceutical and food industries, are preferably fabrics.
  • melt viscosity index (MFI) 230 ° C / 2.16 kg is 1.7 g / 10 min.
  • the polypropylene granules and optionally the additive granules are admitted directly into the extruder and melted. Wiring conditions
  • Wiring block electrically heated
  • Drawing benches and heating channels Drawing bench 1 7 pancakes; diameter of the pancakes: 230 mm; 1 heating channel Drawing bench 2: 7 pancakes; diameter of the pancakes: 230 mm; 1 heating channel Drawing bench 3: 7 pancakes; diameter of the pancakes: 230 mm; 2 heating channels Drawing bench 4: 4 pancakes; diameter of the pancakes: 230 mm
  • CM The mechanical constant CM is calculated according to the following formula: where D denotes the elongation in [%] and F denotes the resistance in [cN / tex].
  • sectional beams of 1000 m each, were manufactured using monofilaments of 60 coils of the different variants.
  • FIGS. 1A, 1B and 1C show photographs of the combs after weaving test according to the method described above.
  • Figure 1A corresponds to Example 1, Figure 1B to Example 2, Figure 1C to the comparative example.
  • the combs of FIGS. 1A and 1B have practically no down, while that of FIG. 1C has a non-negligible amount of down.
  • FIG. 2 presents the results in terms of abrasion behavior of examples 1, 2 and the comparative example.
  • Example 1 Monofilaments are obtained from polypropylene granules whose melt viscosity index (MFI) 230 ° C / 2.16 kg is 1.7 g / 10 min, according to a method and under the conditions described above.
  • Example 2 Monofilaments are obtained from polypropylene granules and granules consisting of polypropylene and modified polyolefin PP / PE, with a melting point> 140 ° C.
  • Comparative Example Monofilaments are obtained in accordance with Example 2 of patent application WO 03/048434. Their abrasion is 0.0156%.
  • the monofilaments according to the invention are suitable for the manufacture, without abrasion, of fabrics intended for filtration. Thanks to the monofilaments according to the invention, it has been possible to weave practically without abrasion the polypropylene monofilament and to considerably increase the operating time of the loom. This monofilament is particularly suitable for the manufacture of fabrics which are used for filtration in the chemical, pharmaceutical and food industries.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Artificial Filaments (AREA)
  • Woven Fabrics (AREA)

Abstract

The invention concerns polypropylene monofilaments exhibiting improved properties, in particular enhanced abrasion resistance, a method for making said monofilaments and their use. More particularly, the invention concerns polypropylene monofilaments obtained from polypropylene having a melt flow index (MFI) not more than 1.9 g/10 min.

Description

MONOFILAMENTS A BASE DE POLYPROPYLENE A PROPRIETES AMELIOREES POLYPROPYLENE-BASED MONOFILAMENTS WITH IMPROVED PROPERTIES
L'invention concerne des monofilaments à base de polypropylene présentant des propriétés améliorées, notamment une résistance à l'abrasion améliorée, un procédé de fabrication de ces monofilaments et leur utilisation. L'invention concerne plus particulièrement des monofilaments à base de polypropylene obtenus à partir d'un polypropylene présentant un indice de viscosité en fondu (MFI) 230 °C/2,16 kg inférieur ou égal à 1.9 g/10min. Les articles textiles à deux dimensions en polypropylene sont d'un grand intérêt, en tant que moyens de filtration résistant chimiquement et mécaniquement, pour la filtration dans les industries chimique, pharmaceutique et alimentaire. Les monofilaments de polypropylene pur présentent l'inconvénient de former beaucoup de poussières par suite de la faible résistance de cette substance à l'abrasion lors du processus de tissage. Le problème de l'abrasion est connu également pour d'autres thermoplastiques. C'est ainsi que IΕP-A2-0 784 107 cite des monofils filés à l'état fondu, de polyamide, polyester ou polypropylene, destinés aux toiles des machines à papier et aux fils des coupe-bordures. Selon ce brevet, on obtient des monofilaments résistant à l'abrasion à l'aide de 70 à 99 % en poids de polymère fibrogène et de 1 à 30 % en poids d'un caoutchouc de polyéthylène/polypropylène, modifié à l'anhydride maléique, et d'autres additifs. Les exemples se limitent toutefois, en ce qui concerne le polymère fibrogène, au polyamide 6 et au polyéthylènetéréphtalate, ainsi qu'à un copolyamide de PA66 et de PA6. Les vitesses de filage ne sont pas précisées. Grâce à l'EP-A-1059370, on connaît également un procédé de fabrication de multifilaments de polypropylene destinés à des applications textiles. Comme matériau de départ, on utilise un polypropylene isotactique, catalysé par un métallocène, dont l'indice de viscosité en fondu est supérieur à 19 g pour 10 minutes. On trouve décrits des multifilaments FOY (Fully Oriented Yarns [= fils totalement orientés]) de 10 dpf (= denier par filament) [0,03953 mm] et POY (Partially Oriented Yarns [= fils partiellement orientés]) de 2 dpf (= deniers par fibre) [0,01768 mm]. En ce qui concerne les fils fabriqués, seules figurent des indications générales. On ne trouve pas décrits de monofilaments. Les demandes WO 02/086207 et WO 03/048434 décrivent des monofilaments de polypropylene comprenant des additifs. Le polypropylene mis en œuvre pour fabriquer les monofilaments présente un indice de viscosité en fondu supérieur ou égal à 6g pour 10 minutes. Ces monofilaments présentent des propriétés de résistance à l'abrasion correctes. Le problème de l'invention consiste à mettre à disposition des monofilaments à base de polypropylene, plus résistants à l'abrasion que les monofilaments connus de l'art antérieur. Un autre problème de l'invention consiste à obtenir des monofilaments à base de polypropylene, qui présentent une résistance améliorée vis-à-vis de l'abrasion lors du tissage.The present invention relates to polypropylene-based monofilaments having improved properties, including improved abrasion resistance, a method of making these monofilaments and their use. The invention relates more particularly to polypropylene-based monofilaments obtained from a polypropylene having a melt viscosity index (MFI) 230 ° C / 2.16 kg less than or equal to 1.9 g / 10 min. Two-dimensional polypropylene textile articles are of great interest, as chemically and mechanically resistant filtration media, for filtration in the chemical, pharmaceutical and food industries. Monofilaments of pure polypropylene have the disadvantage of forming a lot of dust due to the low resistance of this substance to abrasion during the weaving process. The abrasion problem is also known for other thermoplastics. Thus, IΕP-A2-0 784 107 cites monofilaments spun in the molten state, of polyamide, polyester or polypropylene, intended for the fabrics of paper machines and for the threads of edge cutters. According to this patent, abrasion resistant monofilaments are obtained using 70 to 99% by weight of fibrogenic polymer and 1 to 30% by weight of a polyethylene / polypropylene rubber, modified with maleic anhydride. , and other additives. The examples are however limited, as far as the fibrogenic polymer is concerned, to polyamide 6 and to polyethylene terephthalate, as well as to a copolyamide of PA66 and PA6. Spinning speeds are not specified. Thanks to EP-A-1059370, a process is also known for manufacturing polypropylene multifilaments intended for textile applications. The starting material used is an isotactic polypropylene, catalyzed by a metallocene, whose melt viscosity index is greater than 19 g for 10 minutes. There are described multifilaments FOY (Fully Oriented Yarns [= fully oriented yarns]) of 10 dpf (= denier per filament) [0.03953 mm] and POY (Partially Oriented Yarns [= partially oriented yarns]) of 2 dpf (= deniers per fiber) [0.01768 mm]. As regards the yarns produced, only general information is given. No described monofilaments are found. Applications WO 02/086207 and WO 03/048434 describe polypropylene monofilaments comprising additives. The polypropylene used to manufacture the monofilaments has a melt viscosity index greater than or equal to 6 g for 10 minutes. These monofilaments have correct abrasion resistance properties. The problem of the invention consists in making available monofilaments based on polypropylene, more resistant to abrasion than the monofilaments known from the prior art. Another problem of the invention consists in obtaining monofilaments based on polypropylene, which exhibit improved resistance to abrasion during weaving.
Un autre problème encore consiste à mettre à disposition l'utilisation de monofilaments, possédant une bonne résistance à l'abrasion, pour la fabrication d'articles techniques à deux dimensions, notamment destinés à la filtration.Yet another problem consists in making available the use of monofilaments, having good abrasion resistance, for the manufacture of two-dimensional technical articles, in particular intended for filtration.
Le problème est résolu selon l'invention notamment grâce à l'utilisation, pour la fabrication des monofilaments, d'un polypropylene présentant un indice de viscosité en fondu (MFI) 230°C/2.16 kg inférieur ou égal à 1.9 g/10min. Les polypropylènes conventionnellement utilisés dans la fabrication des monofilaments sont des polypropylènes isotactiques. Les monofilaments de l'invention présentent avantageusement une abrasion inférieure ou égale à 0.014%.The problem is solved according to the invention in particular through the use, for the manufacture of monofilaments, of a polypropylene having a melt viscosity index (MFI) 230 ° C / 2.16 kg less than or equal to 1.9 g / 10 min. The polypropylenes conventionally used in the manufacture of monofilaments are isotactic polypropylenes. The monofilaments of the invention advantageously have an abrasion less than or equal to 0.014%.
L'abrasion des monofilaments est déterminée par mesure gravimétrique de la quantité de duvet produite lors de la fabrication d'une longueur de tissu de 300m, selon la méthode décrite ci-dessous dans la partie expérimentale. La valeur d'abrasion correspond au résultat de la formule décrite ci-dessous dans la partie expérimentale, calculée pour une longueur de tissu de 300 m.The abrasion of the monofilaments is determined by gravimetric measurement of the quantity of down produced during the manufacture of a length of fabric of 300 m, according to the method described below in the experimental part. The abrasion value corresponds to the result of the formula described below in the experimental part, calculated for a fabric length of 300 m.
Il est particulièrement avantageux que les monofilaments présentent une abrasion de moins de 0,014 %. En effet, lorsque l'abrasion est supérieure à 0,014 %, il peut se produire des irrégularités lors du tissage, dues à un encrassement trop rapide des peignes. Cela peut obliger à raccourcir les intervalles entre nettoyages, ce qui diminue la productivité du métier.It is particularly advantageous that the monofilaments have an abrasion of less than 0.014%. In fact, when the abrasion is greater than 0.014%, irregularities can occur during weaving, due to too rapid fouling of the combs. This may require shortening the intervals between cleanings, which decreases the productivity of the loom.
Les monofilaments de l'invention présentent de préférence une abrasion inférieure ou égale 0.01%. II est approprié que les monofilaments possèdent une résistance d'au moinsThe monofilaments of the invention preferably have an abrasion less than or equal to 0.01%. It is appropriate that the monofilaments have a resistance of at least
50 cN/tex, pour un allongement correspondant à l'effort de traction maximal (allongement à la rupture) au moins égal à 20 %. En effet, une résistance inférieure à 50 cN/tex présente l'inconvénient de multiplier les casses de fil lors du processus de tissage. Les monofilaments de l'invention présentent avantageusement une constante mécanique supérieure ou égale à 285cN/tex. Selon un mode de réalisation particulier de l'invention, les monofilaments comprennent un additif. Les monofilaments comprennent avantageusement de 0.01 à 20% en poids d'additif par rapport au poids de polypropylene. Avantageusement, il est approprié d'utiliser comme additif un copolymère de polypropylène/polyéthylène possédant un point de fusion > 140 °C. Avantageusement cet additif est présent dans une proportion de 1 à 20% en poids par rapport au poids de polypropylene. L'invention concerne également un procédé de fabrication des monofilaments de l'invention, comprenant les étapes de filage du polypropylene en fondu par extrusion, étirage et bobinage. Les monofilaments à base de polypropylene de l'invention peuvent être obtenus à partir de méthodes classiques de filage. Ils sont généralement obtenus par filage en fondu par extrusion, refroidissement dans un bain d'eau lorsque le titre des monofilaments est supérieur ou égal à 0.05mm, étirage et bobinage. Lorsque les monofilaments de l'invention comprennent un additif, l'additif est généralement ajouté au polypropylene en amont d'une extrudeuse avant le filage. Les monofilaments selon l'invention conviennent particulièrement à la fabrication d'articles techniques à deux dimensions, et notamment à la fabrication de tels articles dans le domaine de la filtration. Ces articles, lorsqu'ils sont destinés à la filtration, notamment dans les industries chimique, pharmaceutique et alimentaire, sont de préférence des tissus.50 cN / tex, for an elongation corresponding to the maximum tensile force (elongation at break) at least equal to 20%. Indeed, a resistance of less than 50 cN / tex has the drawback of multiplying the breaks in the yarn during the weaving process. The monofilaments of the invention advantageously have a mechanical constant greater than or equal to 285cN / tex. According to a particular embodiment of the invention, the monofilaments comprise an additive. The monofilaments advantageously comprise from 0.01 to 20% by weight of additive relative to the weight of polypropylene. Advantageously, it is appropriate to use as an additive a polypropylene / polyethylene copolymer having a melting point> 140 ° C. Advantageously, this additive is present in a proportion of 1 to 20% by weight relative to the weight of polypropylene. The invention also relates to a method for manufacturing the monofilaments of the invention, comprising the steps of spinning polypropylene in the melt by extrusion, drawing and winding. The polypropylene-based monofilaments of the invention can be obtained from conventional spinning methods. They are generally obtained by melt spinning by extrusion, cooling in a water bath when the titer of the monofilaments is greater than or equal to 0.05mm, drawing and winding. When the monofilaments of the invention comprise an additive, the additive is generally added to the polypropylene upstream of an extruder before spinning. The monofilaments according to the invention are particularly suitable for the manufacture of two-dimensional technical articles, and in particular for the manufacture of such articles in the field of filtration. These articles, when they are intended for filtration, in particular in the chemical, pharmaceutical and food industries, are preferably fabrics.
On va maintenant décrire l'invention de façon plus détaillée, à l'aide d'exemples.The invention will now be described in more detail, using examples.
Polymère Comme polymère, on utilise lors des essais un polypropylene dont l'indice de viscosité en fondu (MFI) 230°C/2,16kg est de 1.7 g/10min.Polymer As the polymer, polypropylene is used during the tests, the melt viscosity index (MFI) 230 ° C / 2.16 kg is 1.7 g / 10 min.
On met en œuvre chaque fois 300 kg de granulé de polypropylene, en utilisant des fûts de 25 kg300 kg of polypropylene granulate are used each time, using 25 kg drums
Les granulés de polypropylene et éventuellement les granulés d'additif sont admis directement dans l'extrudeuse et fondus. Conditions de filageThe polypropylene granules and optionally the additive granules are admitted directly into the extruder and melted. Wiring conditions
Extrudeuse : diamètre : 40 mm; longueur du cylindre : LJD = 25Extruder: diameter: 40 mm; cylinder length: LJD = 25
Pression de l'extrudeuse : 80 bar débit : 14.5 kg/h 5 zones chauffantesExtruder pressure: 80 bar flow rate: 14.5 kg / h 5 heating zones
Pompe de filage : cylindrée : 10 cm3/toursSpinning pump: displacement: 10 cm 3 / turns
Bloc de filage : à chauffage électriqueWiring block: electrically heated
Pompe de titrage : 23,19 tours/minTitration pump: 23.19 rpm
Filières : diamètre : 0,7 mm longueur du capillaire : 3 x DDies: diameter: 0.7 mm capillary length: 3 x D
Bain d'eau : distance entre filière et bain d'eau : 45 mm température : 50 °CWater bath: distance between die and water bath: 45 mm temperature: 50 ° C
Bancs d'étirage et canaux de chauffage Banc d'étirage 1 : 7 galettes; diamètre des galettes : 230 mm; 1 canal de chauffage Banc d'étirage 2 : 7 galettes; diamètre des galettes : 230 mm; 1 canal de chauffage Banc d'étirage 3 : 7 galettes; diamètre des galettes : 230 mm; 2 canaux de chauffage Banc d'étirage 4 : 4 galettes; diamètre des galettes : 230 mmDrawing benches and heating channels Drawing bench 1: 7 pancakes; diameter of the pancakes: 230 mm; 1 heating channel Drawing bench 2: 7 pancakes; diameter of the pancakes: 230 mm; 1 heating channel Drawing bench 3: 7 pancakes; diameter of the pancakes: 230 mm; 2 heating channels Drawing bench 4: 4 pancakes; diameter of the pancakes: 230 mm
Méthodes de mesure :Measuring methods:
• Indice de viscosité en fondu selon ASTM D1238• Fade viscosity index according to ASTM D1238
• Détermination du titre selon SN 197 012 et SN 197 015, complétées par DIN 53830/• Determination of titer according to SN 197 012 and SN 197 015, supplemented by DIN 53830 /
• Le calcul de la constante mécanique CM est réalisé selon la formule suivante : où D désigne l'allongement en [%] et F la résistance en [cN/tex].• The mechanical constant CM is calculated according to the following formula: where D denotes the elongation in [%] and F denotes the resistance in [cN / tex].
• Détermination du retrait thermique selon BISFA (Chapitre 11 du protocole standard : « Détermination du retrait thermique à l'air chaud »), réalisée dans les conditions suivantes : -Tension 0.02 cN/dtex -Température : 120°C -Durée : 10 min• Determination of thermal shrinkage according to BISFA (Chapter 11 of the standard protocol: “Determination of thermal shrinkage with hot air”), carried out under the following conditions: -Tension 0.02 cN / dtex -Temperature: 120 ° C -Duration: 10 min
Description des essais d'abrasionDescription of abrasion tests
Fabrication des ensouples sectionnelles Les ensouples sectionnelles, de 1000 m chacune, ont été fabriquées à l'aide des monofils de 60 bobines des différentes variantes.Manufacturing of sectional beams The sectional beams, of 1000 m each, were manufactured using monofilaments of 60 coils of the different variants.
Essais de tissage Les essais de tissage sont réalisés sur un métier à rubans. Production maximale possible : 4000 tours/min La foule est formée grâce à des excentriques. Mode de travail : sans rentrée de trame Densité des fils de chaîne : 22,80 fils/cm Peigne : ouverture : 0,175 mm épaisseur des dents : 0,264 mm largeur des dents : 7,0 mm Vitesse de rotation du métier à tisser : 1000 tours/min Vitesse de tissage : 10 m/h Armure : toile à draps L1/1Weaving tests The weaving tests are carried out on a ribbon loom. Maximum possible production: 4000 rpm The crowd is formed using eccentrics. Working mode: without weft rewinding Density of warp threads: 22.80 threads / cm Comb: opening: 0.175 mm teeth thickness: 0.264 mm teeth width: 7.0 mm Rotation speed of the loom: 1000 turns / min Weaving speed: 10 m / h Weave: L1 / 1 cloth
Évaluation du comportement à l'abrasion :Abrasion behavior assessment:
- évaluation visuelle des peignes- visual evaluation of the combs
- détermination gravimétrique de la quantité de duvet produite- gravimetric determination of the quantity of down produced
Lors de l'examen visuel, on photographie les peignes après une durée de fonctionnement correspondant à une longueur de tissu de 300 m, et on leur attribue un classement. Les figure 1A, 1 B et 1C présentent des photographies des peignes après essai de tissage selon la méthode décrite ci-dessus. La figure 1A correspond à l'exemple 1 , la figure 1B à l'exemple 2, la figure 1C à l'exemple comparatif. Les peignes des figures 1A et 1 B ne présentent pratiquement pas de duvet, alors que celui de la figure 1C présente une quantité non négligeable de duvet.During the visual examination, the combs are photographed after an operating time corresponding to a length of fabric of 300 m, and they are assigned a classification. FIGS. 1A, 1B and 1C show photographs of the combs after weaving test according to the method described above. Figure 1A corresponds to Example 1, Figure 1B to Example 2, Figure 1C to the comparative example. The combs of FIGS. 1A and 1B have practically no down, while that of FIG. 1C has a non-negligible amount of down.
L'évaluation du comportement à l'abrasion selon la méthode gravimétrique est décrite ci- dessous. Pour cela, on recueille la totalité du duvet formé, après une durée de fonctionnement correspondant à une longueur de tissu de 300 m, on la pèse et on la rapporte au poids des fils de chaîne à l'aide de la formule suivante : masse des dépôts • 100 dépôt en % = 1. J r-Λ Λ _ - longueur des fils de chaîne • titre nombre de fils de chaîne m onoThe evaluation of the abrasion behavior according to the gravimetric method is described below. For this, the entire down formed is collected, after an operating period corresponding to a length of fabric of 300 m, it is weighed and it is related to the weight of the warp threads using the following formula: mass of deposits • 100 deposit in% = 1. J r-Λ Λ _ - length of warp threads • title number of warp threads m ono
On peut également évaluer le comportement à l'abrasion selon la même méthode gravimétrique que décrite ci-dessus, pour une longueur de tissu de 1000 m. La figure 2 présente les résultats en terme de comportement à l'abrasion des exemples 1 , 2 et de l'exemple comparatif.The abrasion behavior can also be evaluated using the same gravimetric method as described above, for a fabric length of 1000 m. FIG. 2 presents the results in terms of abrasion behavior of examples 1, 2 and the comparative example.
Exemples Exemple 1 Des monofilaments sont obtenus à partir de granulés de polypropylene dont l'indice de viscosité en fondu (MFI) 230°C/2,16kg est de 1.7 g/10min, selon une méthode et dans les conditions décrites ci-dessus. Exemple 2 Des monofilaments sont obtenus à partir de granulés de polypropylene et de granulés constitués de polypropylene et de polyoléfine modifiée PP/PE, à point de fusion >140°C.Examples Example 1 Monofilaments are obtained from polypropylene granules whose melt viscosity index (MFI) 230 ° C / 2.16 kg is 1.7 g / 10 min, according to a method and under the conditions described above. Example 2 Monofilaments are obtained from polypropylene granules and granules consisting of polypropylene and modified polyolefin PP / PE, with a melting point> 140 ° C.
Les exemples ont été résumés au tableau 1. Tableau 1The examples have been summarized in Table 1. Table 1
Exemple comparatif Des monofilaments sont obtenus conformément à l'exemple 2 de la demande de brevet WO 03/048434. Leur abrasion est de 0.0156%. Les monofilaments selon l'invention conviennent à la fabrication, sans abrasion, des tissus destinés à la filtration. Grâce aux monofilaments selon l'invention, on est parvenu à tisser pratiquement sans abrasion du monofilament de polypropylene et à accroître considérablement la durée de fonctionnement du métier à tisser. Ce monofilament convient particulièrement à la fabrication des tissus qui sont utilisés pour la filtration dans les industries chimique, pharmaceutique et alimentaire. Comparative Example Monofilaments are obtained in accordance with Example 2 of patent application WO 03/048434. Their abrasion is 0.0156%. The monofilaments according to the invention are suitable for the manufacture, without abrasion, of fabrics intended for filtration. Thanks to the monofilaments according to the invention, it has been possible to weave practically without abrasion the polypropylene monofilament and to considerably increase the operating time of the loom. This monofilament is particularly suitable for the manufacture of fabrics which are used for filtration in the chemical, pharmaceutical and food industries.

Claims

REVENDICATIONS
1. Monofilaments à base de polypropylene, caractérisés en ce qu'ils sont obtenus à partir d'un polypropylene présentant un indice de viscosité en fondu (MFI) 230°C/2.16 kg inférieur ou égal à 1.9 g/10min.1. Polypropylene-based monofilaments, characterized in that they are obtained from a polypropylene having a melt viscosity index (MFI) 230 ° C / 2.16 kg less than or equal to 1.9 g / 10min.
2. Monofilaments selon la revendication 1 , caractérisés en ce qu'ils présentent une abrasion inférieure ou égale à 0.014 %2. Monofilaments according to claim 1, characterized in that they have an abrasion less than or equal to 0.014%
3. Monofilaments selon la revendication 2, caractérisés en ce que la valeur d'abrasion est inférieure ou égale à 0.01 %3. Monofilaments according to claim 2, characterized in that the abrasion value is less than or equal to 0.01%
4. Monofilaments selon l'une des revendications 1 à 3, caractérisés en ce qu'ils présentent une résistance d'au moins 50 cN/tex, pour un allongement correspondant à l'effort de traction maximal (allongement à la rupture) au moins égal à 20%4. Monofilaments according to one of claims 1 to 3, characterized in that they have a resistance of at least 50 cN / tex, for an elongation corresponding to the maximum tensile force (elongation at break) at least equal to 20%
5. Monofilaments selon l'une des revendications 1 à 4, caractérisés en ce qu'ils comprennent 0.01 à 20% en poids par rapport au poids de polypropylene, d'additif5. Monofilaments according to one of claims 1 to 4, characterized in that they comprise 0.01 to 20% by weight relative to the weight of polypropylene, of additive
6. Monofilaments selon la revendication 5, caractérisés en ce que l'additif est un copolymère de polypropylène/polyéthylène possédant un point de fusion > 140 °C,6. Monofilaments according to claim 5, characterized in that the additive is a polypropylene / polyethylene copolymer having a melting point> 140 ° C,
7. Monofilaments selon la revendication 6, caractérisés en ce qu'ils comprennent 1 à 20 % en poids, par rapport au poids de polypropylene, de ce copolymère.7. Monofilaments according to claim 6, characterized in that they comprise 1 to 20% by weight, relative to the weight of polypropylene, of this copolymer.
8. Procédé de fabrication des monofilaments selon l'une des revendications 1 à 7 comprenant les étapes de filage du polypropylene en fondu par extrusion, étirage et bobinage.8. A method of manufacturing monofilaments according to one of claims 1 to 7 comprising the steps of spinning polypropylene in the melt by extrusion, drawing and winding.
9. Utilisation des monofilaments selon l'une des revendications 1 à 7 pour la fabrication d'articles techniques à deux dimensions9. Use of monofilaments according to one of claims 1 to 7 for the manufacture of two-dimensional technical articles
10. Utilisation selon la revendication 9 dans le domaine de la filtration10. Use according to claim 9 in the field of filtration
11. Utilisation selon la revendication 9 ou 10, caractérisée en ce que l'article est un tissu pour filtration 11. Use according to claim 9 or 10, characterized in that the article is a fabric for filtration
EP05742619A 2004-03-30 2005-03-22 Polypropylene monofilaments with improved properties Withdrawn EP1730334A1 (en)

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FR0403283A FR2868438B1 (en) 2004-03-30 2004-03-30 MONOFILAMENTS BASED ON POLYPROPYLENE WITH IMPROVED PROPERTIES
PCT/FR2005/000688 WO2005100649A1 (en) 2004-03-30 2005-03-22 Polypropylene monofilaments with improved properties

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JP7062984B2 (en) * 2018-02-06 2022-05-09 東レ株式会社 Abrasion tester for the surface of raw yarn for woven fabrics
CN109023647B (en) * 2018-08-22 2020-11-10 安徽利思达网业有限公司 Preparation method of wear-resistant monofilament filter cloth for filtering high-temperature liquid

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JPS61152810A (en) * 1984-12-27 1986-07-11 Chisso Corp Production of improved polypropylene monofilament
JPS6241311A (en) * 1985-08-09 1987-02-23 Chisso Corp Improved polypropylene monofilament and production thereof
JPH02104716A (en) * 1988-10-14 1990-04-17 Ube Nitto Kasei Co Ltd Particular high-tenacity monofilament
JP3142672B2 (en) * 1992-12-21 2001-03-07 三菱化学株式会社 Yarn for artificial grass
TW579394B (en) * 2001-04-24 2004-03-11 Rhodia Industrial Yarns Ag Process for the production of fine monofilaments made from polypropylene, fine monofilaments made from polypropylene, and their application
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WO2005100649A1 (en) 2005-10-27
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CA2561321A1 (en) 2005-10-27
US20080113194A1 (en) 2008-05-15
AU2005233341A1 (en) 2005-10-27
BRPI0508733A (en) 2007-08-14
FR2868438A1 (en) 2005-10-07
KR20060132985A (en) 2006-12-22
ZA200608115B (en) 2008-06-25
FR2868438B1 (en) 2006-10-20
JP2007530813A (en) 2007-11-01
AU2005233341B2 (en) 2008-07-10

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