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1. WO2000040789 - NONWOVEN FABRICS PREPARED USING VISBROKEN SINGLE-SITE CATALYZED POLYPROPYLENE

Publication Number WO/2000/040789
Publication Date 13.07.2000
International Application No. PCT/US2000/000303
International Filing Date 06.01.2000
Chapter 2 Demand Filed 05.08.2000
IPC
C08F 8/06 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
8Chemical modification by after-treatment
06Oxidation
C08F 8/50 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
8Chemical modification by after-treatment
50Partial depolymerisation
D01F 6/06 2006.01
DTEXTILES; PAPER
01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
FCHEMICAL FEATURES IN THE MANUFACTURE OF MAN-MADE FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
6Monocomponent man-made filaments or the like of synthetic polymers; Manufacture thereof
02from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
04from polyolefins
06from polypropylene
D01F 8/06 2006.01
DTEXTILES; PAPER
01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
FCHEMICAL FEATURES IN THE MANUFACTURE OF MAN-MADE FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
8Conjugated, i.e. bi- or multicomponent, man-made filaments or the like; Manufacture thereof
04from synthetic polymers
06with at least one polyolefin as constituent
D04H 1/42 2012.01
DTEXTILES; PAPER
04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING
1Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
40from fleeces or layers composed of fibres without existing or potential cohesive properties
42characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
CPC
B29C 2948/92704
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
2948Indexing scheme relating to extrusion moulding
92Measuring, controlling or regulating
92504Controlled parameter
92704Temperature
B29C 48/022
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
48Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
022characterised by the choice of material
B29C 48/395
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
48Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
25Component parts, details or accessories; Auxiliary operations
36Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
395using screws surrounded by a cooperating barrel, e.g. single screw extruders
B29C 48/82
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
48Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
25Component parts, details or accessories; Auxiliary operations
78Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
80at the plasticising zone, e.g. by heating cylinders
82Cooling
B29C 48/92
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
48Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
25Component parts, details or accessories; Auxiliary operations
92Measuring, controlling or regulating
C08F 2810/10
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
2810Chemical modification of a polymer
10including a reactive processing step which leads, inter alia, to morphological and/or rheological modifications, e.g. visbreaking
Applicants
  • KIMBERLY-CLARK WORLDWIDE, INC. [US/US]; 401 North Lake Street Neenah, WI 54956, US
Inventors
  • PEKRUL, Robert, Louis; US
  • KOBYLIVKER, Peter, Michailovich; US
Agents
  • PETERSEN, Maxwell, J.; Pauley Petersen Kinne & Fejer Suite 365 2800 West Higgins Road Hoffman Estates, IL 60195 , US
Priority Data
09/439,25712.11.1999US
60/115,25408.01.1999US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) NONWOVEN FABRICS PREPARED USING VISBROKEN SINGLE-SITE CATALYZED POLYPROPYLENE
(FR) PREPARATION DE TISSUS NON TISSES A L'AIDE D'UN POLYPROPYLENE VISCOREDUIT ET CATALYSE SUR UN SEUL SITE
Abstract
(EN)
Nonwoven filaments having improved melt spinning process characteristics and end use properties are prepared using a visbroken single-site catalyzed propylene polymer. The propylene polymer has a first melt flow rate (MFR) before visbreaking and a second MFR after visbreaking, such that the ratio of the second MFR to the first MFR is about 1:1 to about 3:1. The nonwoven filaments exhibit less filament tension during spinning, and permit higher line speeds before breaking, than similar filaments prepared using a single-site catalyzed propylene polymer having the second MFR straight out of the reactor, and which has not been visbroken.
(FR)
L'invention concerne des filaments non tissés possédant des caractéristiques lors du processus de filage par fusion et des propriétés d'utilisation finale améliorées. On prépare ces filaments en utilisant un polymère de propylène viscoréduit catalysé sur un seul site. Ce polymère de propylène présente un premier taux de fluidité (MFR)avant viscoréduction et un second MFR après viscoréduction, de sorte que le rapport du second MFR sur le premier est d'environ 1/1 sur 3/1. Ces filaments non tissés présentent une tension moindre lors du filage, et permettent des cadences plus élevées avant rupture, par rapport à des filaments similaires que l'on prépare en utilisant un polymère de propylène possédant le second MFR dès sa sortie du réacteur, sans viscoréduction.
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