U.S. patent application number 10/499810 was filed with the patent office on 2005-02-24 for composite yarn, method for obtaining same and resulting textile structure.
This patent application is currently assigned to CHAVANOZ INDUSTRIE. Invention is credited to Berge, Philippe, Conesa, Isabelle, Pollet, Laurence.
Application Number | 20050042447 10/499810 |
Document ID | / |
Family ID | 8871083 |
Filed Date | 2005-02-24 |
United States Patent
Application |
20050042447 |
Kind Code |
A1 |
Conesa, Isabelle ; et
al. |
February 24, 2005 |
Composite yarn, method for obtaining same and resulting textile
structure
Abstract
The invention concerns a composite yarn consisting of a
continuous yarn, obtained by spinning fibers made of organic or
inorganic material or natural fibers, and a polymer material. The
invention is characterized in that the consecutive fibers said yarn
are uniformly distributed in said polymer material such that each
of said fibers is coated by said polymer material. The invention
also concerns a method for making such a composite yarn and a
textile structure obtainable from at least a composite yarn of the
invention.
Inventors: |
Conesa, Isabelle; (Saint
Romain De Jalionas, FR) ; Berge, Philippe; (Jonage,
FR) ; Pollet, Laurence; (Lyon, FR) |
Correspondence
Address: |
OLIFF & BERRIDGE, PLC
P.O. BOX 19928
ALEXANDRIA
VA
22320
US
|
Assignee: |
CHAVANOZ INDUSTRIE
|
Family ID: |
8871083 |
Appl. No.: |
10/499810 |
Filed: |
August 10, 2004 |
PCT Filed: |
December 27, 2002 |
PCT NO: |
PCT/FR02/04577 |
Current U.S.
Class: |
428/364 |
Current CPC
Class: |
D02G 3/404 20130101;
D02G 3/44 20130101; Y10T 428/2913 20150115 |
Class at
Publication: |
428/364 |
International
Class: |
D02G 003/00 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 28, 2001 |
FR |
01 17047 |
Claims
1. A composite yarn consisting of a continuous yarn, obtained by
spinning fibers made of an organic or inorganic material or natural
fibers, and of a polymer material, characterized in that the
constituent fibers of said continuous yarn are uniformly
distributed within said polymer material in such a way that each of
said fibers is coated by said polymer material.
2. A composite yarn that can be obtained by a process for coating
with a liquid monomer or polymer preparation comprising a polymer
material, characterized in that it comprises a core consisting of a
composite yarn as claimed in claim 1, and in that the material
formed around the core and the constituent polymer material of the
core are of the same nature.
3. A fire-retarded composite yarn that can be obtained by a process
for coating with a liquid monomer or polymer preparation comprising
a polymer material and a fire-retarding filler, characterized in
that it comprises a core consisting of a composite yarn as claimed
in claim 1 and in that the material formed around the core and the
constituent polymer material of the core are of the same
nature.
4. The composite yarn as claimed in claim 1, characterized in that
the inorganic or organic material constituting the fibers of the
yarn is chosen from a group consisting of polyester, glass or
silica.
5. The composite yarn as claimed in claim 1 characterized in that
the polymer material is chosen from chlorinated polymers.
6. The composite yarn as claimed in claim 5, characterized in that
the chlorinated polymer material is chosen from the group
consisting of polyvinyl chloride, superchlorinated PVCs,
polyvinylidene chlorides and chlorinated polyolefins.
7. The composite yarn as claimed in claim 1 characterized in that
the polymer material is chosen from organopolysiloxanes.
8. The composite yarn as claimed in claim 1 characterized in that
the polymer material is chosen from polyurethanes.
9. The composite yarn as claimed in claim 3, characterized in that
the fire-retarding filler is chosen from the group consisting of
zinc borate, aluminum hydroxide, antimony trioxide and zinc
hydroxystannate.
10. A process for manufacturing a composite yarn, characterized in
that a continuous yarn, obtained by spinning fibers made of an
organic or inorganic material, is subjected to a process for
mechanically opening the yarn that allows said fibers to be
separated, simultaneously with or prior to its coating by a polymer
material.
11. A process for manufacturing a composite yarn, characterized in
that a continuous yarn, obtained by spinning fibers made of an
organic or inorganic material, is subjected to a process for
mechanically opening the yarn that allows said fibers to be
separated, prior to a primary coating with a liquid monomer or
polymer preparation, and in that the composite yarn obtained is
subjected to a second coating with a liquid monomer or polymer
preparation.
12. A process for manufacturing a fire-retarded composite yarn,
characterized in that a continuous yarn, obtained by spinning
fibers made of an organic or inorganic material, is subjected to a
process for mechanically opening the yarn that allows said fibers
to be separated, prior to a primary coating with a liquid monomer
or polymer preparation that does not contain a fire-retarding
filler, and in that the composite yarn obtained is subjected to a
second coating with a liquid monomer or polymer preparation
containing a fire-retarding filler.
13. The process as claimed in claim 11, characterized in that the
monomer or polymer of the second coating is of the same nature as
the monomer or polymer of the first coating.
14. A textile structure, for example a fabric, characterized in
that it can be obtained from at least one composite yarn as claimed
in claim 1.
Description
[0001] The present invention relates to a composite yarn for
technical or industrial use, that can be assembled into all types
of textile structure, especially textile webs suitable for meeting
any particular application or specification, for example for the
manufacture of blinds or curtains. More particularly, the invention
relates to composite yarns that can be obtained by coating.
[0002] Already generally known, and as manufactured and sold by the
Applicant, are technical composite yarns comprising:
[0003] a core comprising a continuous yarn, especially made of an
inorganic material such as glass, or an organic material such as
polyester, polyamide or polyvinyl alcohol, and
[0004] a sheath or jacket comprising a matrix consisting of at
least one chlorinated polymer material, for example a polyvinyl
chloride (PVC), a fire-retardant mineral filler, incorporated into
and distributed within said matrix, and a plasticizer.
[0005] Preferably, but not exclusively, such a yarn is obtained by
coating, in one or more layers, the core with a plastisol
comprising the chlorinated polymer material, for example polyvinyl
chloride, and the plasticizer, and then by gelling the plastisol
around the core.
[0006] The technical fabrics obtained with such yarns, and when
they are used in various environments, especially for the equipping
both inside and outside of buildings or constructions, for example
as blinds, have to meet requirements regarding fire behavior that
are defined by national or international regulations and/or
homologation or authorization procedures.
[0007] Thus, the regulations applicable to such fabrics in the
German Federal Republic define various classes that are
characterized in particular by the specimen length destroyed by
fire, and by the temperature of the combustion smoke, said classes
being identified by the letters B1 to B3, the letter B1
characterizing the best fire behavior that can be obtained by a
material containing organic matter.
[0008] The regulations applicable in France also define various
classes according to the NF 1601 and NF P 92503 standards, on the
one hand, characterized especially by the emission of smoke and
identified by the letters F0 to F5, F3 being the best behavior that
can be obtained by a material containing a halogenated polymer,
and, on the other hand, characterized in particular by the residual
ignition temperature of the fabric and identified by the letters M0
to M4, the letter M1 identifying the best fire behavior that can in
general be obtained by a material containing organic matter.
[0009] Various attempts have been made to improve the intrinsic
fire behavior of these composite yarns, for example by using
particular plasticizers such as organic phosphates. Unfortunately,
the use of such plasticizers degrades the functional properties
(flexibility, slipability, etc.) of these yarns, which impairs
their subsequent weaving, and makes the latter more difficult.
Moreover, the incorporation of such plasticizers increases the
smoke index.
[0010] With regard to the performance of the actual fire-retarding
filler, various documents have proposed diverse types of compounds
or compositions that can improve the fire behavior of plastic
matrices in which the fire-retarding filler has been incorporated,
but without the application or the forming of the fire-retarded
plastic, for example in the form of a yarn, being specified.
[0011] Thus, document JP-A-58185637 has proposed, for a matrix
based on polyvinyl chloride, a fire-retarding filler comprising a
chlorinated polyethylene, a compound chosen in particular from
antimony and aluminum oxides and/or hydroxides, and preferably
another compound chosen from zinc salts, including zinc borate, and
tin-based products, for example zinc stannate.
[0012] Document FR-A-2 448 554 has proposed, again for a matrix
based on polyvinyl chloride and also incorporating a stabilizer, a
plasticizer consisting of a phosphoric ester, and an alumina
hydroxide filler, a fire-retarding filler comprising an antimony
oxide, optionally combined with a zinc borate.
[0013] None of the fire-retarding fillers proposed above is
suitable for improving to the desired extent the fire behavior of a
composite yarn as considered above, and without degrading its other
properties, for example mechanical properties.
[0014] Nor is it possible to significantly increase the weight
proportion of fire-retarding filler, except at the expense, as
above, of degrading the functional properties of the composite
yarn.
[0015] The subject of the present invention is a coated composite
yarn exhibiting, overall and intrinsically, improved fire behavior,
thus favoring the dissipation of heat and making it possible to
greatly reduce the random phenomenon of flame propagation measured
by fire tests according to the NF P 92 503 standard on any fabric
obtained from the composite yarn according to the invention.
[0016] The temperature withstand properties are improved owing to
the uniform distribution of the fibers within the polymer coating
material that allows the heat to be dissipated since, when the
fibers are grouped together, they constitute a preferential
conduction path that promotes heat propagation.
[0017] The subject of the invention is a composite yarn consisting
of a continuous yarn, obtained by spinning fibers made of an
organic or inorganic material or natural fibers, such as flax or
cotton fibers, and of a polymer material, characterized in that the
constituent fibers of said continuous yarn are uniformly
distributed within said polymer material in such a way that each of
said fibers is coated by said polymer material.
[0018] This composite yarn can be used by itself or as a core for
the manufacture of composite yarns obtained by a second coating
with a polymer material.
[0019] The subject of the present invention is also a coated
composite yarn that can be obtained by a process for coating with a
polymer material, characterized in that it comprises a core
consisting of a composite yarn as defined above and in that the
polymer material formed around the core and the constituent polymer
material of the core are of the same nature.
[0020] Depending on the required fire behavior characteristics,
this composite yarn can be used as a core for the manufacture of
fire-retarded composite yarns obtained by coating with polymers
containing fire-retarding fillers.
[0021] Thus, yarns exhibiting overall and intrinsically improved
fire behavior using less fire-retarding filler are obtained.
[0022] The subject of the present invention is also a coated
fire-retarded composite yarn that can be obtained by a process for
coating with a polymer material containing a fire-retarding filler,
characterized in that it comprises a core consisting of a composite
yarn as defined above and in that the polymer material formed
around the core and the constituent polymer material of the core
are of the same nature.
[0023] According to the invention, said coating can be carried out
using a liquid monomer or polymer preparation; for example, a
liquid polymer preparation is obtained by melting a polymer or by
dispersing a polymer, for example in the form of a plastisol; and,
for example, a liquid monomer preparation consists of a liquid
monomer that will polymerize through the effect of heat or by
irradiation, for example UV irradiation.
[0024] The invention also relates to a process for manufacturing a
composite yarn, characterized in that a continuous yarn, obtained
by spinning fibers made of an organic or inorganic material or
natural fibers, is subjected to a process for mechanically opening
the yarn that allows said fibers to be separated, simultaneously
with or prior to its coating by a polymer material.
[0025] The invention furthermore relates to a process for
manufacturing a composite yarn, characterized in that a continuous
yarn, obtained by spinning fibers made of an organic or inorganic
material or natural fibers, is subjected to a process for
mechanically opening the yarn that allows said fibers to be
separated, simultaneously with or prior to a primary coating with a
liquid monomer preparation or a polymer preparation in the liquid
state, and in that the composite yarn obtained is subjected to a
second coating with a liquid monomer or polymer preparation.
[0026] Preferably, the monomer or polymer of the second coating is
of the same nature as the monomer or polymer of the first
coating.
[0027] The invention furthermore relates to a process for
manufacturing a fire-retarded composite yarn, characterized in that
a continuous yarn, obtained by spinning fibers made of an organic
or inorganic material or natural fibers, is subjected to a process
for mechanically opening the yarn that allows said fibers to be
separated, simultaneously with or prior to a primary coating with a
liquid monomer preparation or polymer preparation in the liquid
state that does not contain a fire-retarding filler, and in that
the composite yarn obtained is subjected to a second coating with a
liquid monomer preparation or polymer preparation in the liquid
state containing a fire-retarding filler.
[0028] The expression "mechanically opening" is understood to mean
any process for opening the fibers, simultaneously with or prior to
the coating operation, such as splaying the fibers, by applying an
air jet or a water jet, an ultrasonic treatment, the application of
mechanical pressure, for example to flatten the yarn, or any
process for separating the fibers in order to allow the polymer
material to penetrate the constituent fibers of said yarn.
[0029] The yarn according to the invention exhibits none of the
desheathing and shading phenomena observed in the yarns of the
prior art.
[0030] These results are obtained without impairing the functional
properties of the actual yarn, that are required for weaving it,
and these properties are even improved. Thus, the fabrics obtained
by weaving these composite yarns are better protected from foul
weather, by the elimination or reduction in capillary wicking, and
are easier to cut by elimination of defibrillation phenomena that
occur on cutting.
[0031] The expression "liquid monomer or polymer preparation" is
understood to mean any liquid formulation based on monomers or
polymers.
[0032] The term "formulation" is understood to mean any compound
comprising at least one product, for example a dispersion, solution
or mixture of monomers and/or oligomers.
[0033] The term "polymer dispersion" is understood to mean any
polymer preparation in the divided state containing additives in an
organic liquid or otherwise.
[0034] The term "plastisol" is understood to mean a dispersion of
polymers, fillers and other additives, in a finely divided state,
in a plasticizer.
[0035] As polymer material, it is possible to use chlorinated
polymers, silicones, polyurethanes, acrylics, ethylene/vinyl
acetate EVA copolymers and ethylene-propylene-diene monomer EPDM
terpolymers.
[0036] As an example of a chlorinated polymer material, it is
possible to use, according to the invention, any PVC resin that can
be plasticized and especially one that can be employed in the form
of a plastisol.
[0037] The term "chlorinated polymer material" is understood to
mean a pure chlorinated polymer or a copolymer of vinyl chloride
copolymerized with other monomers, or else a chlorinated polymer
that is alloyed with other polymers.
[0038] Among monomers that can be copolymerized with vinyl
chloride, mention may in particular be made of: olefins, such as
for example ethylene; vinyl esters of saturated carboxylic acids,
such as vinyl acetate, vinyl butyrate or maleates; halogenated
vinyl derivatives, such as for example vinylidene chloride; and
acrylic or methacrylic acid esters, such as butyl acrylate.
[0039] As chlorinated polymer, mention may in particular be made of
polyvinyl chloride, and also superchlorinated PVCs, polyvinylidene
chlorides and chlorinated polyolefins.
[0040] Preferably, but not exclusively, the chlorinated polymer
material according to the present invention has a halogen weight
content of between 40 and 70%.
[0041] According to the invention, it is possible to use, as
silicone polymer material, organopolysiloxanes and more
particularly polysiloxane resins and elastomers with or without a
diluent.
[0042] According to the invention, it is possible to use, as
polyurethane polymer material, any material formed from a
hydrocarbon chain containing the urethane or --NHCOO-- unit.
[0043] As regards the continuous yarn, this itself consists of one
or more continuous filaments or fibers. Its chemical nature may be
organic, for example made of polyester, polyamide, polyvinyl, or
acrylic, of natural origin, such as flax or cotton, or inorganic,
for example made of glass or silica, it being understood that its
melting point must be above that at which the polymer material is
processed.
[0044] The fire-retarding filler is chosen from the group formed by
zinc borate, aluminum hydroxide, antimony trioxide and zinc
hydroxystannate, molybdenum compounds, halogenated derivatives,
compounds containing active halogens, phosphorus compounds, and
intumescent systems.
[0045] Other fillers may be incorporated and distributed within the
liquid monomer or polymer preparation, in addition to the
fire-retarding filler, for example a pigmenting filler, silica,
talc, glass beads and/or a stabilizer. In such a case, the total
composition by weight of the composite yarn, in terms of inorganic
materials, is obviously modified or affected.
[0046] In the case of the use of a plastisol, thanks to the
invention it remains possible to use conventional plasticizers, for
example comprising at least one phthalate, and consequently not to
compromise the functional properties of the yarn, with regard to
its subsequent weaving.
[0047] The invention also makes it possible to limit the weight of
fire-retarding filler, in proportions not exceeding 50% of the
plastic matrix. Above 50%, the properties, especially mechanical
properties, of the composite yarn are impaired.
[0048] All the technical characteristics of the yarn are improved.
More particularly, the uniform distribution of the polymer material
formed around the core, the resistance to capillary effects, the
homogeneity of the shades, and the bonding of the sheath to the
core should be noted.
[0049] In the case of the use of a PVC plastisol, the addition of a
bonding agent of the isocyanate type is unnecessary.
[0050] FIG. 1 shows in cross section a fire-retarded composite yarn
of the prior art.
[0051] FIG. 2 shows in cross section a fire-retarded composite yarn
according to the invention.
[0052] Uniform distribution of the fibers 1 within the monomer or
polymer preparation 2 applied in the liquid state and cooled or
polymerized after application may be observed. The secondary
coating 3 is also uniformly distributed in the composite yarn
according to the invention.
[0053] The following comparative table illustrates all these
characteristics, by comparison with a conventionally coated yarn,
in the particular case of the use of a chlorinated polymer
material, namely PVC.
1 Coating according to the Standard coating invention Yarn Twist
>40 turns Possibility of using twists <40 turns 1.sup.st
coating 1 500 mPa .multidot. s fire- 30 mPa .multidot. s plastisol:
retarded PVC plastisol: PVC resin = 100 phr PVC resin = 100 phr
filler content = 0 filler (fire-retardant) plasticizer content = 60
content = 15 to 25 phr to 70 phr plasticizer content = 30
stabilizers = 2-10 phr to 50 phr Degree of application = 65
stabilizers = 2-10 phr to 90% 2.sup.nd coating Fire-retarded PVC 1
500 mPa .multidot. fire-retarded plastisol identical to PVC
plastisol; degree of the first coating application = 30 to 50%: PVC
resin = 100 phr filler (fire- retardant) content = 15-25 phr
plasticizer content = 30-50 phr stabilizers = 2-10 phr Properties
LOI = 30.7%: LOI = 30%: of the slight shading no shading coated
yarn slight desheathing no desheathing fire-retardant content = 8
fire-retardant content to 15% reduced by about 60% 1.sup.st
coating: +45% PVC fire-retardant 2.sup.nd coating: +24% PVC content
= 10% no chimney effect 1.sup.st coating: +41% PVC 2.sup.nd
coating: +30% PVC Properties M1 B1 M1 maintained and more of the
Slightly shaded uniform fabric Slight desheating B1 (sheath
fracturing under Constancy of mechanical mechanical stress)
properties under stress (glass yarn not destroyed) No shading No
desheathing No defilbrillation No capillary effect
[0054] The degree of application is the amount of impregnation of
the yarn--it is defined by the following formula: 1 weight of the
coated yarn - weight of the yarn weight of the coated yarn .times.
100 ;
[0055] LOI represents the Limited Oxygen Index--it is determined
according to the NF G 07128 standard.
[0056] To prepare formulations according to the invention, based on
a chlorinated polymer such as PVC, the following ingredients were
used by way of example:
[0057] Resins:
[0058] a. PVC resin
[0059] VINNOLIT P4472, VINNOLIT P70, VINNOLIT P70 PS (Vinnolit),
SELIN 372 No. (Selvan);
[0060] b. filler resin
[0061] LACOVYL B 1050 (Atofina), VINNOLIT C65V (Vinnolit), VINNOLIT
C66 (Vinnolit), C66W.
[0062] Plasticizers:
[0063] DINP (JAYFLEX DINP, PALATINOL N (BASF), VESTINOL 9 (Oxeno)),
TXIB (Eastman TXIB), DIDP (JAYFLEX DIDP (Exxon), PALATINOL Z
(BASF)), BBP (SANTICIZER 206) (Ferro).
[0064] Stabilizers:
[0065] a. Heat stabilizers
[0066] based on Pb (BAEROSTAB V 220) (Baerlocher)
[0067] based on barium and zinc organic salts (LASTAB DC 261 GL
(Lagor), MARK BZ 561 (Witco))
[0068] based on thiotin (BAEROSTAB M62 A (Baerlocher))
[0069] b. UV stabilizer
[0070] Benzotriazole or benzophenone (TINUVIN 320, TINUVIN 571,
TINUVIN P (Witco)).
[0071] Fillers:
[0072] Opacifying fillers: zinc sulfide ZnS (SACHTOLIT L
(Sachtleben)), titanium dioxide (Kronos).
[0073] Fire retardants:
[0074] Zinc borate (FIREBREAK ZB (US Borax))
[0075] Aluminum hydroxide (Alumina SH 5) (Omya)
[0076] Antimony trioxide (antimony oxide/TIMONOX) (Sica, Campine,
plc)
[0077] Zinc hydroxystannate (STORMFLAM ZHS (Joseph Storey).
[0078] Additives:
[0079] Viscosity modifiers/rheology agents: VISCOBYK-4013,
CAB-O-SIL, EXXSOL D80 (Byk-Chemie, Cabot, Exxon).
[0080] Wetting agents: DISPERPLAST-1142 (Byk-Chemie).
[0081] Since glass favors heat dissipation, the phenomenon of flame
propagation encountered in fire tests according to the NF 92503
standard on fabrics is, with a fabric obtained by weaving a
fire-retarded yarn according to the invention, greatly reduced as
the polymer material is better distributed within the core of the
fibers and the stored heat is therefore better dissipated by the
fibers.
[0082] This dissipation optimization makes it possible overall to
reduce the content of fire-retardant fillers in the coated
fire-retarded composite yarn.
[0083] The following examples illustrate the invention in the
particular case of the use of a silicone-based polymer
material.
[0084] A halogen-free coated fire-retarded composite yarn according
to the invention was obtained by coating a mineral yarn/continuous
glass fiber/continuous glass filament according to the process of
the invention, that is to say by mechanically opening the yarn, by
splaying it, simultaneously with or prior to the coating operation
with a liquid polymer preparation based on a silicone polymer.
[0085] The coating formulation was defined by a viscosity between
500 and 10 000 mPa.s and preferably between 1 000 and 5 000 mPa.s,
measured at 25.degree. C. using a Brookfield RVT viscometer at 20
rpm with a No. 4 spindle.
[0086] The coating was carried out with a formulation comprising
the following products:
2 Silicone 100 phr Solvent/water 0 to 50 phr Fillers (pigment, fire
retardant, etc.) 0 to 20 phr Crosslinking agent 2 to 6 phr
Additives 0 to 5 phr Additives 0 to 5 phr.
[0087] The silicones used were, for example:
[0088] ELASTOSIL RD6635, RD 3151 or 45539 WP (Wacker), RHODOSIL RTV
1519 (Rhodia), DOW FC227TS (Dow Corning), 9050/30P from Dow
Corning, 6600 F from Wacker, SILASTIC LPX from Dow Corning,
SILICOLEASE UV POLY 200 and UV CATA 211 from Rhodia.
[0089] The diluents were chosen from toluene, xylene, white spirit
and water.
[0090] The fillers consisted for example of FIREBREAK ZB zinc
borate, aluminum hydroxide (Omya), SH5n alumina, promoter such as
ELASTOSIL 45568 VP or HF86 (Wacker), retarder HTV-SB (Wacker),
water-repellent agent WS60E (Wacker) or glass beads (Sovitec), RAL
pigmentary paste from Wacker.
[0091] The following formulations were made and composite yarns
according to the invention obtained by coating.
EXAMPLE 1
[0092]
3 First coating: 30% degree of application 100 phr 9050/30P from
Dow Corning (3 000 cP viscosity) Second coating, 30% degree of
application 100 phr 9050/30P SILASTIC (Dow Corning) 2 phr
EXAMPLE 2
[0093]
4 First coating, 15% degree of application 9050/30P from Dow
Corning Second coating, 15% degree of application RD3151 (Wacker)
100 phr HTV-SB Batch 2 (Wacker) 0.5 phr FIREBREAK Zn borate 5 phr
RAL pigmentary paste (Wacker) 2 phr ELASTOSIL W crosslinking agent
(Wacker) 3 phr
EXAMPLE 3
[0094]
5 Single coating 18% degree of application 6600 F (Wacker) 100 phr
HTV-SB Batch 2 (Wacker) 1 phr ATH (Alcan) 20 phr ELASTOSIL W
crosslinking agent (Wacker) 5 phr Toluene 20 phr
EXAMPLE 4
[0095]
6 The silicones used were UV-crosslinkable. First coating:
SILICOLEASE UV POLY 200 (Rhodia) 100 parts SILICOLEASE UV CATA 211
(Rhodia) 2 to 5 parts Second coating: SILICOLEASE UV POLY 200
(Rhodia) 100 parts SILICOLEASE UV CATA 211 (Rhodia) 2 to 5 parts
Fire-retarding fillers Pigment.
[0096] The fabrics obtained with a composite yarn according to the
invention require no subsequent treatment in order to improve their
fire behavior.
[0097] A composite yarn according to the invention exhibits no
defibrillation on cutting, it is more hydrophobic and it is
"softer" to the touch; the textiles obtained by weaving are
stain-resistant.
[0098] A composite yarn according to the present invention can be
incorporated into any textile structure, or assembled as any
required textile structure, whether two-dimensional (webs, fabrics,
etc.) or three-dimensional (for example braids).
[0099] The composite yarn may firstly be cut and divided into
elementary yarns, which can be intermingled and fastened to one
another, in the form of nonwoven textile structures, for example
mats. The intermingled elementary yarns may be fastened by
impregnation with a suitable adhesive substance, or by the thermal
melting of the polymer material of the sheath.
[0100] The composite yarn may then be assembled on itself in any
suitable knitted textile structure, but it may also be assembled
with other yarns, whether or not according to the present
invention, in order to constitute various two-dimensional or
three-dimensional structures; in the latter case, these may be
meshes in which the yarns according to the present invention are
interlaced with and fastened to other yarns, whether or not
according to the present invention, and fabrics in which the
composite yarns according to the invention are woven with other
warp and/or weft yarns, again whether or not according to the
invention.
[0101] A very particular application of the present invention
relates to the production of technical fabrics intended for the
production or manufacture of both interior and exterior blinds or
curtains.
[0102] After fire tests, all these fabrics have shown that they
meet both the German regulations with class B1 and the French
regulations with class M1 and F3.
* * * * *