EP0445708B1 - Procédé pour la fabrication de fibres alvéolaires - Google Patents

Procédé pour la fabrication de fibres alvéolaires Download PDF

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Publication number
EP0445708B1
EP0445708B1 EP91103256A EP91103256A EP0445708B1 EP 0445708 B1 EP0445708 B1 EP 0445708B1 EP 91103256 A EP91103256 A EP 91103256A EP 91103256 A EP91103256 A EP 91103256A EP 0445708 B1 EP0445708 B1 EP 0445708B1
Authority
EP
European Patent Office
Prior art keywords
polyester
weight
polycarbonate
blowing agent
fibres
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
EP91103256A
Other languages
German (de)
English (en)
Other versions
EP0445708A2 (fr
EP0445708A3 (en
Inventor
Axel Dr. Vischer
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.)
Hoechst AG
Original Assignee
Hoechst AG
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 Hoechst AG filed Critical Hoechst AG
Publication of EP0445708A2 publication Critical patent/EP0445708A2/fr
Publication of EP0445708A3 publication Critical patent/EP0445708A3/de
Application granted granted Critical
Publication of EP0445708B1 publication Critical patent/EP0445708B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • D01D5/24—Formation of filaments, threads, or the like with a hollow structure; Spinnerette packs therefor
    • D01D5/247—Discontinuous hollow structure or microporous structure
    • 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
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/08—Addition of substances to the spinning solution or to the melt for forming hollow filaments
    • 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
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters

Definitions

  • the invention relates to a method for producing foam threads according to the preamble of patent claim 1.
  • Foam threads i.e. Filaments or staple fibers with non-continuous voids are used as carpet fibers and also as filling fibers for blankets, pillows or as lining material for anoraks and other winter clothing.
  • One advantage of foam threads is their low density and thus the larger volume of fillers per weight. To achieve a noticeable reduction in density, about 15% void in the finished, crimped foam threads is desired. Since the void fraction decreases during stretching, the void fraction after spinning must be correspondingly larger. With regard to the curling, the cavities must be sufficiently stable against crushing.
  • a method for producing foam threads from a synthetic high polymer, a blowing agent and an additive is known from DE-ASen 25 50 080 and 25 50 081.
  • the high polymer used is polyester such as polyethylene terephthalate or polyamide such as polyamide-6 and polyamide-66.
  • a blowing agent i.e. Gas-forming substance low-boiling hydrocarbons such as pentane, hexane or the gaseous hydrocarbons such as propane or butane are mentioned at room temperature.
  • the additive is a silicone oil that is intended to improve the spinnability of the polymer, increase the running time of the spinneret and ensure an even distribution of the cavities.
  • Sodium bicarbonate and citric acid are also used as blowing agents in the production of foamed plastics, for example for structural foam molded parts, cf. e.g. EP 0 059 495 and 0 158 212.
  • the plastics mentioned include various high polymers such as polyester.
  • sodium carbonate and citric acid lead to good foaming in polyesters, it has been shown that this blowing agent damages the polyester. For example, a degradation of 0.15 intrinsic viscosity units was observed with an intrinsic viscosity of about 0.65, which corresponds to a molecular weight degradation of over 20%.
  • polycarbonate in the production of polyester threads is already known from DE-OS 27 03 051.
  • 3 to 20% by weight of a polycarbonate is added to the polyester to be spun before spinning in order to increase the water retention capacity through voids in the threads.
  • sodium bicarbonate and citric acid and polycarbonate are mixed into the polyester.
  • the addition of the polycarbonate counteracts the degradation of the melt viscosity of the polyester which would otherwise occur. This has resulted in a reduction in the molecular weight of the polyester from the feed polymer to the finished foam thread observed by less than 5%.
  • the use of sodium bicarbonate and citric acid as blowing agents has the advantage that these substances only decompose at high temperatures and are toxicologically harmless.
  • Polycarbonate also has the advantage of being toxicologically safe.
  • the blowing agent consisting of sodium bicarbonate and citric acid is expediently added in an amount of 0.15 to 0.80% by weight of the polyester and the polycarbonate in an amount of 0.5 to 2% by weight of the polyester.
  • a blowing agent composed of sodium bicarbonate and citric acid is understood to mean a largely arbitrary mixture of an alkali bicarbonate and citric acid, preferably in a weight ratio of 1: 3 to 3: 1.
  • the blowing agent content is preferably 0.15 to 0.4% by weight for polyethylene terephthalate and 0.3 to 0.6% by weight for polybutylene terephthalate.
  • a preferred polycarbonate content is in each case 1.0 to 1.5% by weight.
  • Polybutylene terephthalate has a slightly higher blowing agent and polycarbonate content than polyethylene terephthalate.
  • the content of third substances to the polyester should be as low as possible.
  • the polyester, the blowing agent and the polycarbonate are mixed in shredded form before melting and the blowing agent is added as a masterbatch, in particular in a polyolefin.
  • the three components can be mixed, for example, in the feed line to the Estruder.
  • the process according to the invention leads to easily processable foam threads (continuous filaments or staple fibers) as carpet material and also as filling material for clothing.
  • foam threads continuous filaments or staple fibers
  • Such carpet or filler fibers are produced by melt spinning and drawing in accordance with the known processes; the process parameters only have to be adjusted slightly in the course of routine tests.
  • thermal processes it should be noted that the insulating effect of the cavities also results in poorer heating of the foam threads.
  • polyethylene terephthalate granules which were dried according to customary methods, are mixed with sodium bicarbonate and citric acid in the form of blowing agent masterbatch (HOSTATRON P 1941 TM) and polycarbonate (MAKROLON 16063068 TM), extruded and spun through spinnerets with a round hole cross-section .
  • blowing agent masterbatch HOSTATRON P 1941 TM
  • MAKROLON 16063068 TM polycarbonate
  • the density of the thread is a measure of the foaming of the thread.
  • the examples show that it is only through the combination of blowing agent and polycarbonate that a significant reduction in density, i.e. a clear void fraction of the thread is achieved.
  • the starting materials are the same as in example series A and B. Instead of a spinneret with a round hole cross section, a hollow profile nozzle is used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Artificial Filaments (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Claims (8)

  1. Procédé pour la préparation de fibres alvéolaires à partir d'un polyester, d'un agent porogène et d'une matière supplémentaire, caractérisé en ce qu'on utilise en tant qu'agents porogène le bicarbonate de sodium et l'acide citrique, et en tant que matière supplémentaire le polycarbonate.
  2. Procédé selon la revendication 1, caractérisé en ce que la teneur en agent porogène est de 0,15 à 0,80 % en poids par rapport au polyester.
  3. Procédé selon la revendication 2, selon lequel le polyester utilisé est le polyéthylènetéréphtalate, caractérisé en ce que la teneur en agent porogène est de 0,15 à 0,4 % en poids du polyester.
  4. Procédé selon la revendication 2, selon lequel le polyester est le polybutylènetéréphtalate, caractérisé en ce que la teneur en agent porogène est de 0,3 à 0,6 % en poids du polyester.
  5. Procédé selon une des revendications précédentes, caractérisé en ce que la teneur en polycarbonate est de 0,5 à 0,2 % en poids du polyester.
  6. Procédé selon la revendication 5, caractérisé en ce que la teneur en polycarbonate est de 1,0 à 1,5 % en poids du polyester.
  7. Procédé selon l'une des revendications précédentes, caractérisé en ce que le polyester, l'agent porogène et le polycarbonate sont mélangés sous forme de rognures avant la fonte et on ajoute l'agent porogène sous forme de mélange maître.
  8. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'on ajoute le porogène en tant que mélange maître dans une polyoléfine.
EP91103256A 1990-03-09 1991-03-05 Procédé pour la fabrication de fibres alvéolaires Expired - Lifetime EP0445708B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4007498 1990-03-09
DE4007498A DE4007498A1 (de) 1990-03-09 1990-03-09 Verfahren zum herstellen von schaumfaeden

Publications (3)

Publication Number Publication Date
EP0445708A2 EP0445708A2 (fr) 1991-09-11
EP0445708A3 EP0445708A3 (en) 1992-10-28
EP0445708B1 true EP0445708B1 (fr) 1994-11-23

Family

ID=6401800

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91103256A Expired - Lifetime EP0445708B1 (fr) 1990-03-09 1991-03-05 Procédé pour la fabrication de fibres alvéolaires

Country Status (8)

Country Link
US (1) US5124098A (fr)
EP (1) EP0445708B1 (fr)
JP (1) JPH04214407A (fr)
AT (1) ATE114338T1 (fr)
DE (2) DE4007498A1 (fr)
ES (1) ES2067069T3 (fr)
IE (1) IE65671B1 (fr)
PT (1) PT96985A (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1252223B (it) * 1991-12-16 1995-06-05 M & G Ricerche Spa Resine poliestere cellulari e loro procedimento di preparazione
US5498468A (en) * 1994-09-23 1996-03-12 Kimberly-Clark Corporation Fabrics composed of ribbon-like fibrous material and method to make the same
GB9622302D0 (en) 1996-10-26 1996-12-18 Scapa Group Plc Expandable pintle wires
US6057024A (en) * 1997-10-31 2000-05-02 Kimberly-Clark Worldwide, Inc. Composite elastic material with ribbon-shaped filaments
US6983571B2 (en) * 2000-09-29 2006-01-10 Teel Plastics, Inc. Composite roofing panel
US7951449B2 (en) 2002-06-27 2011-05-31 Wenguang Ma Polyester core materials and structural sandwich composites thereof
US20050221075A1 (en) * 2004-03-31 2005-10-06 Travelute Frederick L Iii Low density light weight filament and fiber
AU2005230840A1 (en) * 2004-03-31 2005-10-20 Wellman, Inc Low density light weight filament and fiber
US20070155271A1 (en) * 2005-12-30 2007-07-05 Touzov Igor V Heat conductive textile and method producing thereof
US7735287B2 (en) * 2006-10-04 2010-06-15 Novik, Inc. Roofing panels and roofing system employing the same
US8020353B2 (en) * 2008-10-15 2011-09-20 Novik, Inc. Polymer building products
US8209938B2 (en) * 2010-03-08 2012-07-03 Novik, Inc. Siding and roofing panel with interlock system
CA135807S (en) 2010-06-04 2011-01-27 Novik Inc Roof or siding shingle panel
CA2838061C (fr) 2012-12-19 2016-03-29 Novik Inc. Systeme de coin pour parement et couvertures de toit et methode pour revetir un coin utilisant celui-ci
US9388565B2 (en) 2012-12-20 2016-07-12 Novik Inc. Siding and roofing panels and method for mounting same
DE102014221060A1 (de) 2014-10-16 2016-04-21 Henkel Ag & Co. Kgaa Thermisch expandierbare Zusammensetzung
CN115849819B (zh) * 2022-12-09 2024-01-12 成都精准混凝土有限公司 一种修补用混凝土及其生产方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3884030A (en) * 1964-07-17 1975-05-20 Monsanto Chemicals Fibrillated foamed textile products and method of making same
DD103375A3 (fr) * 1970-07-17 1974-01-20
DE2550081B1 (de) * 1975-11-07 1977-04-28 Akzo Gmbh Verfahren zur herstellung eines bikomponentenfadens
DE2550080B2 (de) * 1975-11-07 1978-03-09 Akzo Gmbh, 5600 Wuppertal Verfahren zur Herstellung von Filamenten mit nicht durchgehenden Hohlräumen
DE2703051A1 (de) * 1977-01-26 1978-07-27 Bayer Ag Hydrophile polyesterfaeden
FR2500463A1 (fr) * 1981-02-24 1982-08-27 Solvay
AT369440B (de) * 1981-06-01 1982-12-27 Chemiefaser Lenzing Ag Verfahren zur herstellung von folienbaendchen
US4544594A (en) * 1983-04-29 1985-10-01 Allied Corporation Foamed polyamide fibers
US4588754A (en) * 1984-01-04 1986-05-13 General Electric Company Low modulus structural foam
DE3411319C2 (de) * 1984-03-28 1986-12-04 Boehringer Ingelheim KG, 6507 Ingelheim Verwendung von Citronensäureestern als Treib- und/oder Nucleierungsmittel zur Herstellung thermoplastischer Kunststoffschäume

Also Published As

Publication number Publication date
DE59103556D1 (de) 1995-01-05
DE4007498A1 (de) 1991-09-12
ES2067069T3 (es) 1995-03-16
PT96985A (pt) 1991-10-31
EP0445708A2 (fr) 1991-09-11
IE910784A1 (en) 1991-09-11
ATE114338T1 (de) 1994-12-15
JPH04214407A (ja) 1992-08-05
IE65671B1 (en) 1995-11-15
EP0445708A3 (en) 1992-10-28
US5124098A (en) 1992-06-23

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