EP0090862A1 - Monofilaments a faible teneur en carboxyl destines a etre utilises dans la fabrication d'un tissu de sechage de machine a papier - Google Patents

Monofilaments a faible teneur en carboxyl destines a etre utilises dans la fabrication d'un tissu de sechage de machine a papier

Info

Publication number
EP0090862A1
EP0090862A1 EP83900675A EP83900675A EP0090862A1 EP 0090862 A1 EP0090862 A1 EP 0090862A1 EP 83900675 A EP83900675 A EP 83900675A EP 83900675 A EP83900675 A EP 83900675A EP 0090862 A1 EP0090862 A1 EP 0090862A1
Authority
EP
European Patent Office
Prior art keywords
polyester
monofilament
stabilizer
percent
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Withdrawn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
EP83900675A
Other languages
German (de)
English (en)
Other versions
EP0090862A4 (fr
Inventor
Girish M Bhatt
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0090862A1 publication Critical patent/EP0090862A1/fr
Publication of EP0090862A4 publication Critical patent/EP0090862A4/fr
Withdrawn legal-status Critical Current

Links

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
    • D01F6/88—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
    • D01F6/92—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 polyesters
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
    • C08K5/005—Stabilisers against oxidation, heat, light, ozone
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/15—Heterocyclic compounds having oxygen in the ring
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
    • C08L75/04—Polyurethanes

Definitions

  • This invention relates to a monofilament of low carboxyl content for use in fabricating a paper machine dryer fabric having improved resistance to hydrolytic degradation and abrasion.
  • the invention also relates to a method of making this filament and to a composition therefor.
  • Polyester monofilaments when woven into fabrics, have many applications in industrial filtration processes and as belts for conveying certain industrial product ' s. Such fabrics are used extensively in the paper industry to filter the wood pulp slurry and convey the formed paper to dryer sections of the paper-making process. The dryer section also contains conveying belts made out of industrial fabrics.
  • It is another object of the invention to provide a composition comprising: a) a polyester; b) a polyester stabilizer; and c) a thermoplastic material.
  • FIGURE 1 is a graph of the % of residual tensile strength vs. time showing a comparison in resistance to hydrolytic degradation between a commercial monofilament and the monofilament according to the invention.
  • the polyester comprises polyethylene terephthalate.
  • the thermoplastic material is selected from the group consisting of polyurethanes and polyetherester block copolymers.
  • the polyester stabilizer is selected from the group consisting of glycidyl ethers, carbodiimides, ketenimines, hydroxyl containing compounds, aziridines and isocyanates.
  • the preferred thermoplastic material consists of poly ⁇ butylene terephthalate-co-(multibutyleneoxy)tere- phthalate ⁇ . This is a Dupont material known as HYTREL.
  • thermoplastic material to be added depends on the balance between the degree of abra- sion resistance required and the deterioration in the physical properties of the monofilament due to addition of the thermoplastic material. Amounts ranging from 1 percent to 30 percent of the compatible polymer may be used in the blend with 5 to 15 percent being the optimum for most applications.
  • the preferred polyester stabilizer consists of a polycarbodiimide known under the trademark STABAXOL.
  • polyester stabilizer Preferably, there is added about 0.1 to 5 percent by weight of said polyester stabilizer, more preferably about 1 to 2 percent by weight.
  • the abrasion resistance can be improved by blending the polyester with optimum amounts of a compatible polymer which has superior abrasion resistance.
  • compatible polymers with good abrasion resistance are polyurethanes produced by the reaction of methylene diphenyl isocyanate or tolylene diisocyanate with polyethylene adipate or phthalate or polyalkylene oxides.
  • Elastomeric polyesters such as polyether-ester block copolymers are also compatible with good abrasion resistance.
  • An example of elastomeric polyester is the commercial product marketed under the trademark of HYTREL which is poly ⁇ butylene tere- phthalate-co-(multibutyleneoxy)terephthalate ⁇ .
  • the polymers mentioned above have melt points considerably lower than those of the polyesters into which they are incorporated.
  • the hydrolytic stability of the polyester is improved by the addition of organic compounds such as carbodiimides which act as acid scavengers.
  • organic compounds such as carbodiimides which act as acid scavengers.
  • the carboxyl end-groups in the polyester molecules catalyze chain- scission at the ester linkages, thereby degrading the physical properties of the product.
  • organic compounds with groups capable of reacting with the COOH end-groups are known to the prior art and may be used as stabilizers for polyesters. Examples of such groups known to the prior art are gly- cidyl ether, carbodiimide, ketenimine, hydroxyl, aziri- dine and isocyanate.
  • the stabilizer is normally incor ⁇ porated in the molten resin immediately after polymeri ⁇ zation or in the extruder during the fabrication process .
  • the stabilizer is good stability to high temperatures, a melting point below normal processing temperatures and lower diffusivity through the polymer.
  • Polycarbodiimide such as those available commercially under the trademark of STABAXOL meet all those requirements and is used extensively with polyurethane and polyester products.
  • the polycarbodiimide is not readily soluble in molten polyesters, and since it has a low viscosity, it cannot be processed in a conventional single screw extruder without creating erratic flow and conveying in the feed section of the screw. Expensive modifications of the extruder would be necessary in order to overcome the feed problems.
  • An alternative to modifying the extruder is to compound the stabilizer in an appropriate carrier prior to incorporating into the polyester.
  • the carrier for a compounded concentrate can be any thermoplastic material.
  • a material having a low melt point to prevent thermal degradation of the stabilizer during compounding. It is also preferable to use a carrier that is compatible with the polyester.
  • Poly- urethanes and elastomeric polyesters are the most suit ⁇ able carriers and this invention relates to their use in producing polyester monofilaments with low carboxyl con ⁇ tent.
  • the method of making a monofilament of low carboxly content for use in fabricating a paper machine dryer fabric having improved resistance to hydrolytic degrada ⁇ tion and abrasion comprises: a) compounding a polyester stabilizer in a thermo ⁇ plastic material; b) incorporating the compounded material obtained in step a) with a polyester; and c) extruding the mixture obtained in step b) in a screw extruder so as to obtain a monofilament.
  • resistance to hydrolytic degradation means resistance to chemical degradation from the reaction of steam with the polyester. The chemical degradation results in a loss in strength of the monofilament fiber.
  • Monofilaments to be tested were wrapped around a tared polyethylene rod and reweighed to obtain the weight of monofilament used in the test.
  • the rod with the mono- filament was spun in a sand slurry for 40 minutes .
  • the sa ple was then removed, dried and reweighed to determine the weight loss.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Paper (AREA)
  • Artificial Filaments (AREA)
  • Woven Fabrics (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

Monofilaments à faible teneur en carboxyl destinés à être utilisés dans la fabrication de tissus de séchage de machine à papier, présentant une résistance améliorée contre la dégradation hydraulitique et l'abrasion. Le monofilament comprend un polyester, un stabilisateur polyester et un matériau thermoplastique. On décrit également le procédé de production ainsi que la composition de ce produit.
EP19830900675 1981-10-09 1982-10-12 Monofilaments a faible teneur en carboxyl destines a etre utilises dans la fabrication d'un tissu de sechage de machine a papier. Withdrawn EP0090862A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US31027881A 1981-10-09 1981-10-09
US310278 1981-10-09

Publications (2)

Publication Number Publication Date
EP0090862A1 true EP0090862A1 (fr) 1983-10-12
EP0090862A4 EP0090862A4 (fr) 1984-01-12

Family

ID=23201772

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830900675 Withdrawn EP0090862A4 (fr) 1981-10-09 1982-10-12 Monofilaments a faible teneur en carboxyl destines a etre utilises dans la fabrication d'un tissu de sechage de machine a papier.

Country Status (9)

Country Link
EP (1) EP0090862A4 (fr)
JP (1) JPS59500373A (fr)
AU (1) AU1040283A (fr)
DE (1) DE3249110T1 (fr)
GB (1) GB2123839A (fr)
IT (1) IT1148619B (fr)
NL (1) NL8220462A (fr)
SE (1) SE8303240L (fr)
WO (1) WO1983001253A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5006162A (en) * 1982-03-25 1991-04-09 Ici Americas Inc. Certain 2-(2-substituted benzoyl)-1,3,5-cyclohexanetriones

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60210659A (ja) * 1984-04-04 1985-10-23 Polyplastics Co 耐熱水性に優れたポリエステル組成物
JPS616390A (ja) * 1984-05-01 1986-01-13 ジエイダブリユ−アイ・リミテツド 乾燥器用布
NL8700617A (nl) * 1987-03-16 1988-10-17 Akzo Nv Werkwijze voor het vervaardigen van garens door het smeltspinnen van polyethyleentereftalaat.
US5502120A (en) * 1988-08-05 1996-03-26 Jwi Ltd. Melt-extruded monofilament comprised of a blend of polyethylene terephthalate and a thermoplastic polyurethane
US5169711A (en) * 1988-08-05 1992-12-08 Jwi Ltd. Paper makers forming fabric
EP0387395B2 (fr) * 1989-03-17 2001-01-03 Jwi Limited Toile stabilisée pour machine de fabrication de papier en polyester modifié avec le polyuréthane
AU638013B2 (en) * 1989-04-24 1993-06-17 Albany International Corp. Paper machine felts
DE3930845A1 (de) * 1989-09-15 1991-03-28 Hoechst Ag Mit carbodiimiden modifizierte polyesterfasern und verfahren zu ihrer herstellung
JP3228977B2 (ja) * 1991-03-14 2001-11-12 ジョーンズ・マンヴィル・インターナショナル・インコーポレーテッド カルボジイミド変性ポリエステル繊維およびその製造方法
DE4307392C2 (de) * 1993-03-10 2001-03-29 Klaus Bloch Monofil mit erhöhter Hydrolysebeständigkeit auf Basis Polyester für die Verwendung in technischen Geweben und Verfahren zu dessen Herstellung
JP3110633B2 (ja) * 1994-02-02 2000-11-20 東レ株式会社 ポリエステル組成物、モノフィラメントおよび工業用織物
DE4410399A1 (de) * 1994-03-25 1995-09-28 Hoechst Ag Abriebfeste Polyestermischung mit erhöhter Verarbeitungssicherheit, Monofilamente daraus und deren Herstellung und Verwendung
DE19511852A1 (de) * 1995-03-31 1996-10-02 Hoechst Trevira Gmbh & Co Kg Hochbelastbare Kern/Mantel-Monofilamente für technische Anwendungen
DE19511853A1 (de) * 1995-03-31 1996-10-02 Hoechst Trevira Gmbh & Co Kg Hochbelastbare Kern/Mantel-Monofilamente für technische Anwendungen
DE19547028A1 (de) * 1995-12-15 1997-07-17 Hoechst Trevira Gmbh & Co Kg Hydrolysebeständige Polyesterfasern und -filamente, Masterbatches und Verfahren zur Hestellung von Polyesterfasern und -filamenten
US5763538A (en) * 1996-10-28 1998-06-09 E. I. Du Pont De Nemours And Company Process for making an oriented polyester article having improved hydrolytic stability
US6147128A (en) * 1998-05-14 2000-11-14 Astenjohnson, Inc. Industrial fabric and yarn made from recycled polyester
DE19834008C2 (de) * 1998-07-29 2000-11-30 Johns Manville Int Inc Monofile Bikomponentenfäden des Kernmanteltyps, Verfahren zu deren Herstellung und deren Verwendung
US6589392B1 (en) * 2001-10-18 2003-07-08 Shakespeare Company Llc Multicomponent monofilament for papermaking forming fabric
US7935737B2 (en) 2006-01-27 2011-05-03 Sabic Innovative Plastics Ip B.V. Articles derived from compositions containing modified polybutylene terephthalate (PBT) random copolymers derived from polyethylene terephthalate (PET)
JP2009525358A (ja) 2006-01-27 2009-07-09 ゼネラル・エレクトリック・カンパニイ ポリアルキレンテレフタレート類とｐｅｔ由来の変性ポリブチレンテレフタレート（ｐｂｔ）類とを含む成形組成物
US7799838B2 (en) 2006-07-26 2010-09-21 Sabic Innovative Plastics Ip B.V. Elastomer blends of polyesters and copolyetheresters derived from polyethylene terephthalate, method of manufacture, and articles therefrom
US8309656B2 (en) 2006-07-26 2012-11-13 Sabic Innovative Plastics Ip B.V. Elastomer blends containing polycarbonates and copolyetheresters derived from polyethylene terephthalate, method of manufacture, and articles therefrom
US8158710B2 (en) 2006-11-27 2012-04-17 Sabic Innovative Plastics Ip B.V. Polyester blends, methods of making, and articles formed therefrom

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2006810A1 (de) * 1969-02-18 1970-09-24 Toray Industries, Inc., Tokio Polyesterformmasse und Verfahren zu deren Herstellung
US3652714A (en) * 1970-02-20 1972-03-28 Phillips Petroleum Co Dyeable blends of poly(ethylene terephthalate) and polyesterether polymers
AU3295578A (en) * 1978-02-02 1978-05-25 The Goodyear Tire & Rubber Company Screen for papermaking apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3904706A (en) * 1973-03-15 1975-09-09 Du Pont Stabilization of polymers containing poly(alkylene oxide) units
US4156702A (en) * 1973-10-29 1979-05-29 E. I. Du Pont De Nemours And Company Adhesion promoted block copolyester composition with multi-functional carboxylic compound
US4167541A (en) * 1977-05-12 1979-09-11 Fiber Industries, Inc. Continuous carrierless dyeable polyesters

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2006810A1 (de) * 1969-02-18 1970-09-24 Toray Industries, Inc., Tokio Polyesterformmasse und Verfahren zu deren Herstellung
US3652714A (en) * 1970-02-20 1972-03-28 Phillips Petroleum Co Dyeable blends of poly(ethylene terephthalate) and polyesterether polymers
AU3295578A (en) * 1978-02-02 1978-05-25 The Goodyear Tire & Rubber Company Screen for papermaking apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO8301253A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5006162A (en) * 1982-03-25 1991-04-09 Ici Americas Inc. Certain 2-(2-substituted benzoyl)-1,3,5-cyclohexanetriones

Also Published As

Publication number Publication date
DE3249110T1 (de) 1984-04-19
WO1983001253A1 (fr) 1983-04-14
GB8315841D0 (en) 1983-07-13
IT1148619B (it) 1986-12-03
SE8303240D0 (sv) 1983-06-08
IT8249252A0 (it) 1982-10-11
NL8220462A (nl) 1983-09-01
GB2123839A (en) 1984-02-08
JPS59500373A (ja) 1984-03-08
EP0090862A4 (fr) 1984-01-12
SE8303240L (sv) 1983-06-08
AU1040283A (en) 1983-04-27

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