WO2007057595A2 - Procédé de fonctionnalisation d'une portion de surface d'une fibre polymérique - Google Patents
Procédé de fonctionnalisation d'une portion de surface d'une fibre polymérique Download PDFInfo
- Publication number
- WO2007057595A2 WO2007057595A2 PCT/FR2006/051150 FR2006051150W WO2007057595A2 WO 2007057595 A2 WO2007057595 A2 WO 2007057595A2 FR 2006051150 W FR2006051150 W FR 2006051150W WO 2007057595 A2 WO2007057595 A2 WO 2007057595A2
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- WO
- WIPO (PCT)
- Prior art keywords
- fiber
- functionalization
- sizing agent
- fibers
- surface functionalization
- 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.)
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Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, e.g. by ultrasonic waves, corona discharge, irradiation, electric currents or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
- C04B16/06—Macromolecular compounds fibrous
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, e.g. by ultrasonic waves, corona discharge, irradiation, electric currents or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
- D06M10/02—Sonic or ultrasonic waves; Corona discharge
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, e.g. by ultrasonic waves, corona discharge, irradiation, electric currents or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
- D06M10/02—Sonic or ultrasonic waves; Corona discharge
- D06M10/025—Corona discharge or low temperature plasma
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, e.g. by ultrasonic waves, corona discharge, irradiation, electric currents or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
- D06M10/04—Physical treatment combined with treatment with chemical compounds or elements
-
- 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
- Y10T428/2933—Coated or with bond, impregnation or core
- Y10T428/2964—Artificial fiber or filament
- Y10T428/2967—Synthetic resin or polymer
-
- 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
- Y10T428/2933—Coated or with bond, impregnation or core
- Y10T428/2964—Artificial fiber or filament
- Y10T428/2967—Synthetic resin or polymer
- Y10T428/2969—Polyamide, polyimide or polyester
Definitions
- the present invention relates to a process for functionalizing a surface portion of a plastic reinforcing fiber, in particular based on a polymer, for example chosen from polyolefins, polyamides, polyesters, polyacrylonitrile and polyvinyl alcohols. and their copolymers.
- a polymer for example chosen from polyolefins, polyamides, polyesters, polyacrylonitrile and polyvinyl alcohols. and their copolymers.
- it also relates to the use of such a fiber on the functionalized surface as a reinforcing element, in particular for example in a matrix based on cement.
- glass has low chemical stability
- steel shows corrosion and has too high a density
- carbon is too brittle, sticks poorly and is expensive
- cellulose has insufficient durability in some applications (especially for roofs)
- ordinary polyethylene and polypropylene have insufficient tensile strength.
- polyacrylonitrile (PAN) and polyvinyl alcohol (PVA) based fibers can be used to provide a fiber cement shaped product having high tensile strength in combination with acceptable ductility.
- PAN and PVA fibers are expensive and considerably increase the cost price of fiber cement products containing them.
- US Pat. No. 4,310,478 and US Pat. No. 5,330,827 disclose a process for producing hydrophilic PP fibers from thin films which comprises a unidirectional mechanical orientation operation of the PP film, followed by the production of a CORONA treatment of the oriented film, and / or deposition of a wetting agent and finally a step of producing the hydrophilic cut fibers by cutting fibrillation.
- the document WO 97/32825 describes a reduced pressure plasma process (0.1 to 10 torr) making it possible to increase the adhesion between the surface of the PP fibers and the cementitious matrices without the use of size after the plasma treatment.
- the documents WO 03/095721 and WO 04/033770 are directed to a process for the manufacture of PP fibers which improve the mechanical properties of the fiber cement products (in particular the resistance to cracking).
- the PP fibers comprise a core and a skin which is grafted by means of an acrylic derivative or which contains a portion of thermoplastic elastomer. This skin can also be treated with CORONA and a deposit of polymers modified by grafting polar functions (aqueous dispersion).
- a surface treatment using an electric discharge is characterized by the physicochemical changes on the surface of the materials induced by the action of so-called active species, generated by the electric discharge.
- an electric discharge is initiated (breakdown of the gas) between two electrodes when subjected to a potential difference, in a controlled atmosphere of a gas mixture comprising at least helium, or argon or nitrogen.
- the gas ionizes (avalanche principle).
- the electrons and the created ions acquire velocity and interact with the neutral particles of the gas. According to their kinetic energy, it results in the creation of new charged particles and excited chemical species.
- excited molecules tend to return to their ground state by emitting a photon whose energy corresponds to the energy difference between the excited and fundamental levels.
- the transitions and the emitting levels are called radiative.
- the metastables of the gas which can only lose their energy by collisions, have enough to break the bond of the polymer and cause the creation of radicals.
- atoms and molecules that only possess kinetic or vibrational energy will transmit it in the form of heat. Radicals will cause chemical reactions of grafting accompanied by heat exchange. It must be kept in mind that all these species are bombarding the surface simultaneously and that a synergistic effect exists. We can not really attribute to a species a given effect.
- the radicals created, excited and ionized, as well as the secondary electrons will interact with the neutrals and between them, photons are also emitted by excitation. All these energy transfers activate the surface and induce structural changes that can result in crosslinking, degradation or functionalization (grafting of new chemical functions) of the substrate, in this case a polymeric fiber.
- micro-discharges whose characteristics are in particular a service life of less than 10 9 S, a mean radius of less than 100 ⁇ m, and a current density of between 100 and 1000 A / cm 2 .
- These discharges can be highlighted by a voltage / current oscillogram measured with the aid of a suitable experimental device, an illustration of which is given in FIG.
- micro-discharges ignite and go off randomly over the entire surface of the electrodes, at least one of which can be covered with a dielectric barrier.
- this filament regime when the materials to be treated are directly brought into contact with the electric discharge, that is to say between the two electrodes, the surface treatment of the materials is more or less homogeneous.
- the transformations induced by this type of treatment will be very inhomogeneous.
- a surface portion of the material that has seen a micro-discharge will be much more degraded than another portion that will not have seen, especially in the case of organic materials.
- the "CORONA” type electric discharge tends to create zones of weakening at the level of the impact zones of the micro-filaments with the fiber surface (local heating, preferential primer). cracks) that decrease their mechanical properties. This phenomenon is even more crucial when it is a small diameter reinforcing fiber made of an olefin-based material, such as polypropylene. Furthermore, the inhomogeneity of the surface treatment can lead to inhomogeneity in terms of chemical reactivity with respect to a chemical agent to be grafted.
- Filamentary electric discharges eg CORONA treatment
- CORONA treatment although allowing the surface of a polymer fiber to be treated in order to improve its coupling in a cementitious matrix, nevertheless show disadvantages to which the present invention provides a solution.
- the plastic films pass in the discharge and they can be treated on the faces
- the filamentary treatment is not homogeneous and difficult to control, since its effectiveness depends very much on the percentage of relative humidity of the air, for example,
- the filamentous treatment can degrade by local heating, a rupture primer, the treated surface leading to a loss of the mechanical properties of the fibers,
- the filamentous treatment deposits a large quantity of electric charges on the surface
- the chemistry of the treatment is limited to the oxidation of the polymer surfaces
- the filamentary treatment does not make it possible, in a controlled manner, to easily deposit a thin organic, organo-mineral or mineral layer on the surface of the polymer (powdering problem for example)
- the inventors have been able to determine that when directly using cut fibers treated by electric discharge filamentary type CORONA in cementitious matrixes, without carrying out a post-sizing, there was a significant accumulation of electrostatic charges on the surface of the polymers (because the substrate is directly in contact with the discharge where it undergoes the bombardment of the charged species ( e-, ions, metastables), and this often poses problems in the handling and in obtaining a good dispersion of the cut fibers Furthermore, the aging of the fibers treated by plasma (without post-sizing) is poorly controlled .
- the inventors discovered quite surprisingly and unexpectedly that it was possible to modify the physicochemical properties without degrading the mechanical performances of the fibers (tenacity, modulus, etc.) consisting of strands composed of X fibers (for example X several hundreds to several thousand) Y microns in diameter (for example between 5 to 30 microns and preferably 8 to 15 microns) based on polymer through a homogeneous functionalization of the surface of the latter, in order to confer these fibers reinforcing characteristics that they did not initially possess.
- X fibers for example X several hundreds to several thousand
- Y microns in diameter for example between 5 to 30 microns and preferably 8 to 15 microns
- the process of continuous surface functionalization of an organic fiber is characterized in that a surface portion of the fibers is chemically modified by means of a homogeneous surface treatment at atmospheric pressure, in which a gaseous atmosphere controlled and in that said surface portion is brought into contact with a solution comprising at least one sizing agent to improve the functionalities of said fiber.
- the functionalisation of the surface portion of said fiber is carried out on a fiber originating from the drawing of threads of material melted and a drawing operation at a temperature below the melting temperature
- the functionalization of the surface portion of said fiber is carried out on a surface portion of a fiber resulting from the fibrillation of a stretched film
- the functionalization of the surface portion is carried out on a film stretched in a preferred direction until a tearing of the fibrillated fiber film is obtained,
- the functionalization of the surface portion is carried out on a fabric, a veil, a nonwoven, a grid or the like,
- the contacting between the fiber portion and the sizing agent is carried out by means of an operation of soaking said portion of fiber in a solution containing said sizing agent,
- the contacting between the fiber portion and the agent is carried out by spraying a solution containing said sizing agent at said fiber portion,
- the contacting between the fiber portion and the sizing agent is carried out by means of a transfer operation with the aid of a transfer member, in particular a sizing roller immersed in a a solution containing said sizing agent, or a fixed guiding member supplying the sizing agent on the line of contact with the fibers,
- said fiber portion is cut into a plurality of sections
- the surface treatment is carried out in a controlled atmosphere comprising at least one ionized gas chosen from helium, argon and nitrogen, taken alone or as a mixture,
- the surface treatment is carried out using a homogeneous electric discharge which is produced between two electrodes subjected to an AC power supply and at a frequency of a few kHz to a few MHz,
- the surface treatment is carried out by blowing the active species of the filamentous or homogeneous electric discharge towards the substrate, the transport of the active species may for example be in a tunnel in which at least said fiber travels.
- this fiber relates to a fiber of which at least one surface portion is made chemically active by the functionalization method described above, this fiber is characterized in that it comprises polymeric chains.
- the reinforcing fiber is an organic fiber
- the reinforcing fiber consists of polymers chosen from polyolefins, polyamides, polyesters, polyacrylonitrile, polyvinyl alcohols and their copolymers.
- the reinforcing fiber is based on polypropylene
- the sizing agent comprises in aqueous solution of polyvinyl alcohol
- the agent comprises, in aqueous solution, a size comprising at least one product based on fatty acid polyethylene glycol ester compounds and phosphoric acid ester based on natural oil of the type of "Synthesin 7292" brand of Dr. Boehme, or at least one product based on a lubricant and antistatic mixture of the type of the trademark "KB 144/2" of Cognis, or at least one product based on a polyethylene glycol ester derived from "Stantex S6077” brand fatty acid of the type of Cognis, or at least one product based on nonionic surfactants and esterquats of the type of "Stantex S6087 / 4" brand of Cognis.
- a shaped product made of "fiber cement” produced by means of a hydraulic setting composition comprising water, hydraulic binders and reinforcing fibers as previously described.
- it relates to an installation allowing the implementation of the method of surface treatment object of the invention which is characterized in that it comprises at least one treatment zone, said zone being either (i) a tunnel, filled with active species blown, in which said fiber travels or (ii) an enclosure provided with at least two electrodes respectively connected to a variable power supply said electrodes being positioned opposite and delimiting between them a space adapted for the passage of a portion of fiber, the entire zone being subjected to a controlled atmosphere at atmospheric pressure.
- FIG. 1 is a schematic view of an installation for implementing the surface treatment method intended for treating a film
- FIG. 2 illustrates the integration of the installation of FIG. 1 allowing the functionalization of a fibrillated fiber
- FIG. 3 illustrates the integration of an alternative embodiment of the remote plasma installation allowing the functionalization of a fiber or a film, a fabric, a veil, or the like
- FIGS. 4 and 5 are tensile curves for various specimens of cementitious matrix incorporating functionalized fibers according to the methods of the invention;
- FIG. 6 is an oscillogram of a filament regime;
- FIG. 7 is an oscillogram of a discharge in steady state.
- a "fiber-cement" product produced using a hydraulic setting composition
- a hydraulic setting composition comprising in particular water, hydraulic binders and reinforcing fibers.
- cement as a binder in the present description.
- Suitable hydraulic setting binders are to be understood as materials which contain an inorganic cement and / or an inorganic binder or adhesive which hardens by hydration.
- Particularly suitable binders which cure by hydration include, for example, Portland cement, high alumina cement, iron Portland cement, trass cement, slag cement, plaster, calcium silicates formed by autoclave treatment and particular binder combinations.
- fiber is defined as either an unstretched fiber (solid phase) or a stretched fiber (in one or more times).
- the fiber designates a thread, a filament, or a set of filaments (of the textile thread type) which are identical or different from one another.
- the fiber can be continuous or cut, short or long. It may also be a so-called “fibrillated” fiber which results from the stretching of a film in a preferred direction, until the tearing of said fibrillated fiber film is initiated and controlled by a mechanical device.
- MFI melt flow index in English
- the fiber is then stretched by mechanical means composed of rollers rotating at increasing speed, the rollers being temperature-controlled.
- At least one surface portion of this fiber within the meaning of the invention is then functionalized, continuously, with the aid of an atmospheric plasma according to methods that will be explained below. .
- the fiber After having undergone this surface functionalization treatment, continuously, the fiber is coated almost immediately after this plasma treatment, by spraying or by bubbling, or by sizing rollers, by a sizing comprising at least one product based on polyethylene glycol fatty acid and phosphoric acid ester based on natural oil of the type of the brand "Synthesin 7292" Dr.
- Boehme or at least one product based on a lubricant and antistatic mixture of the type of that of mark "KB 144/2" of Cognis, or at least one product based on a polyethylene glycol ester derived from fatty acid of the type of that brand "Stantex S6077” of Cognis, or at least one product to base of nonionic surfactants and esterquats of the type of the trademark "Stantex S6087 / 4" of Cognis or an aqueous solution of polyvinyl alcohol, at a rate of 0.30% by weight of solids content of polypropylene fiber.
- this cut fiber thus functionalized constitutes a reinforcement in a cement matrix.
- the fiber is then cut into a 10 mm section to carry out the tests (incorporation into cement forms).
- a form is defined as a product manufactured by a laboratory method that fairly accurately reproduces the main characteristics of the products obtained by industrial methods such as the Hatschek technique.
- a cementitious composition is prepared on the basis of the following cementitious matrix, suspended with a large excess of water:
- a mode of implementation of the method which is the subject of the invention consists precisely in a surface treatment, continuously, a surface portion of a film, a veil, a mat, a fabric or the like (hereinafter referred to as an organic substrate) that meets this triple objective.
- a surface portion of the organic-based reinforcing substrate is directed within a treatment zone, shaped for example into an installation suitable for implementing the method.
- This installation comprises schematically as shown in Figure 1 first of all a speaker.
- This enclosure represented by the reference 1 in this Figure 1 has at least two electrodes 2 and 3, respectively connected to the terminals of a variable frequency voltage generator 4.
- the electrodes positioned facing each other delimit between them a treatment volume 5 adapted for the passage of at least one surface portion 8 of the substrate.
- each of the electrodes is coated with a dielectric layer 6, 7 directed towards the treatment volume 5.
- each dielectric layer 6, 7 is alumina base and is separated by a thickness of between 0.1 to 20 mm, preferably between 1 and 6 mm.
- the enclosure 1 is waterproof with respect to the external environment and may be the seat of a controlled atmosphere in composition and pressure. It has for this purpose a plurality of conduits 9, 10 for the contributions and evacuations of said atmosphere.
- the controlled atmosphere of gas is at atmospheric pressure and consists mainly of nitrogen, helium, argon, used alone or mixed with other oxidizing species (O2, CO2, H2O ...) or reducing (NH3, H2 ).
- a discharge is said to be homogeneous as opposed to a CORONA discharge when it is not possible, on the macroscopic and microscopic scale, to perceive between the electrodes the presence of arcs or filaments, micro-discharges, between two electrodes subjected to a potential difference, in a controlled atmosphere of a gas mixture as defined above, and at atmospheric pressure.
- the nature of the regime can be highlighted by a voltage / current oscillogram (see Figure 7).
- the presence of a homogeneous discharge confined between the electrodes 6, 7 at the level of the treatment zone 5 makes it possible to functionalize, chemically modify or chemically activate a surface portion.
- the continuous surface treatment method which is the subject of the invention is used to modify at least one surface portion of the organic substrate, consisting of olefinic monomers, and more particularly to polypropylene base (PP).
- FIG. 2 illustrates an industrial embodiment of FIG. 1. Control of the atmosphere of the plasmagenic gas will then be carried out for example by gas barriers.
- a filamentary or homogeneous electrical discharge is used which is deported or blown (also referred to as plasma), this is injected for example in a tube 5 in which the fiber (or a film, a web, a nonwoven, a fabric, or a stretched fiber, or more generally an organic substrate) travels and undergoes the functionalization treatment of its surface beforehand.
- Spun or spray coating, or any other equivalent system, of a sizing agent for example on a PP fiber with a PVA or SYNTHESIN 7292 composition.
- This post sizing is illustrated by the reference E in Figures 2 and 3 with the aid of at least one sizing roller, a "gudulette” (split support including ceramic through which the sizing is injected) or the like, which allows to deposit the sizing solution.
- a "gudulette” split support including ceramic through which the sizing is injected
- the PP fibers will be described in more detail. These fibers generally result from drawing a polypropylene-based yarn or ribbon.
- the PP does not need to be modified by organic or inorganic additives in order to make it compatible with the hydraulic setting matrix, this function being ensured by the sizing. Nevertheless, for particular applications, it may be envisaged to incorporate additives or modifying charges, in particular hydrophilic additives, into the matrix.
- additives or fillers commonly used for drawing the polyolefin, in particular those intended to facilitate spinning may be contained.
- a reinforcing effect was observed with relatively small section PP fibers, expressed by a titer of the order of 0.5 to 10 dtex, more preferably 0.5 to 2 dtex.
- the section of the fibers is not necessarily circular and can take an irregular shape, especially multilobed.
- the PP fiber has a high tenacity of at least 4 cN / dtex, preferably at least 5 cN / dtex, very preferably at least 7 cN / dtex, and in particular 8 to 8 cN / dtex. 10 cN / dtex.
- This toughness range can be achieved by adjusting the spinning and drawing process of the PP fiber appropriately.
- a PP fiber material can be specifically selected with a suitable molecular weight distribution.
- the fibers are generally in the form of son cut at a length of the order of 2 to 50 mm, in particular 6 to 20 mm using a cutter marked C in Figures 2 and 3.
- the total amount of sizing agent (s) present on the fiber is generally of the order of 0.05 to 5% by weight of dry matter relative to the weight of polyolefin, in particular of the order of 0, 1 to 2% by weight.
- the stretching operation not only makes it possible to bring the cross-section of the fiber to the desired size, but also taking into account the forces printed during drawing of the fiber, to induce in the latter tensile stresses resulting in a reorganization. macromolecular chains that are better oriented.
- the fibers according to the invention can also be obtained by fibrillation of an extruded polymer film (for example based on polypropylene). The fibers may then have a ribbon shape.
- the reinforcing fibers can be obtained from several commonly used grades of polypropylene.
- the polypropylene fibers or a portion of the polypropylene fibers may optionally comprise fillers.
- the surface portions of these fibers are then brought into contact with a solution comprising at least one so-called post-sizing agent which makes it possible to improve the chemical resistance or the adhesion of said surface portion to the cement, according to a first embodiment.
- This contacting can be carried out in a conventional manner by a method of dipping, spraying, scouring, a sizing roller, a gudulette or any other equivalent method.
- the agent in solution adapted to provide the adhesion between the fiber and the matrix is an aqueous solution diluted between 0.5 and 10% polyvinyl alcohol PVA, and more preferably close to 2% .
- the agent in solution is a sizing composition of industrial type. The following is an industrial type size containing a mixture of branded products. SYNTHESIN 7292, between 0.5 and 10%, and preferably close to 3.5%.
- a shape is a test piece having a cementitious matrix incorporating plasma functionalized polymeric fibers coated with a post sizing (either PVA, or SYNTHESIN 7292)).
- the tensile tests were carried out by installing the forms between the jaws of a traction machine with a distance between jaws of 200 mm. The tensile test is performed at a spreading speed of 1.2 mm / min.
- the force (F) - displacement curve is drawn which has a typical appearance of the results observed in tension with products obtained by the Hatschek technique (see figures 4 and 5).
- the length of the multi-cracking tray (L) reflects the reinforcing effect of the plate by all the fibers.
- the dissipated energy (E) during the tensile test corresponds to the area under the force displacement curve.
- the surface treatments were carried out using a commercial source of ACXYS technologies.
- the surface treatments were carried out using a commercial source of ACXYS technologies.
- a tense fiber is put in place on a parallelepiped mold, centering the fiber well, and the mortar is molded around the fiber without breaking the fiber.
- the mold is placed in a waterproof bag.
- the cure is conducted for 48 h at 20 0 C and 95% relative humidity in a curing chamber for setting the mortar.
- the contents of the molds are then demolded and placed with a little water in a thermosealed bag maintained at 40 ° C. for 5 days.
- the procedure measures the 7th day after machining of the specimens.
- the plasma treatments make it possible to significantly improve the adhesion of the functionalized fiber within the cement matrix.
- the invention described above offers multiple advantages when the fiber is thus functionalized by an atmospheric plasma treatment and followed by a post-sizing and a cutting operation, it can be used as a reinforcement in a cement matrix. Such advantages of the invention can be obtained when the fiber is used as: • fibers for paper reinforcement.
- Plasma makes it possible to modify the surface to make the fibers hydrophilic and to account for them with the papermaking process.
- the plasma makes it possible to functionalize the surface to make compatible the fibers with the coating essential to the manipulation of the grids on site.
- Fibers for reinforcement of elastomeric matrix composites are provided. According to an advantageous characteristic of the invention, the fibers thus treated have mechanical tensile performance which is improved by at least 10%.
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Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020087011259A KR101414431B1 (ko) | 2005-11-10 | 2006-11-08 | 중합체 섬유 표면부의 관능화 방법 |
| US12/092,210 US20090305038A1 (en) | 2005-11-10 | 2006-11-08 | Method for functionalising a polymer fibre surface area |
| BRPI0618462-6A BRPI0618462B1 (pt) | 2005-11-10 | 2006-11-08 | Processo de funcionalização contínua de superfície de uma fibra orgânica, fibra de que pelo menos uma porção de superfície é funcionalizada e instalação permitindo a execução do processo de funcionalização de superfície |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0553433 | 2005-11-10 | ||
| FR0553433A FR2893037B1 (fr) | 2005-11-10 | 2005-11-10 | Procede de fonctionnalisation d'une portion de surface d'une fibre polymerique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2007057595A2 true WO2007057595A2 (fr) | 2007-05-24 |
| WO2007057595A3 WO2007057595A3 (fr) | 2007-11-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2006/051150 Ceased WO2007057595A2 (fr) | 2005-11-10 | 2006-11-08 | Procédé de fonctionnalisation d'une portion de surface d'une fibre polymérique |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20090305038A1 (fr) |
| KR (1) | KR101414431B1 (fr) |
| BR (1) | BRPI0618462B1 (fr) |
| FR (1) | FR2893037B1 (fr) |
| WO (1) | WO2007057595A2 (fr) |
| ZA (1) | ZA200803917B (fr) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| DE2223795A1 (de) * | 1971-07-07 | 1973-01-25 | Oschatz Glasseide Veb | Verfahren zum aktivieren von festkoerperoberflaechen, insbesondere von faserstoffoberflaechen, vorzugsweise von oberflaechen von glasfaeden oder mischfadengebilden aus glasfaserstoffen u. organischen faserstoffen |
| DE2535768A1 (de) * | 1975-08-11 | 1977-02-24 | Wacker Chemie Gmbh | Gleitmittel fuer organische fasern und verfahren zum herstellen solcher gleitmittel |
| DE2927238A1 (de) * | 1978-07-07 | 1980-01-17 | Holm Varde As | Kunststoff-verstaerkungsfasern und verfahren zu ihrer herstellung |
| JPS6037225B2 (ja) * | 1981-06-24 | 1985-08-24 | 東レ株式会社 | 被覆繊維 |
| DK514687D0 (da) * | 1987-09-30 | 1987-09-30 | Danaklon As | Polymerfibre og fremgangsmaade til fremstilling deraf |
| FR2782837B1 (fr) * | 1998-08-28 | 2000-09-29 | Air Liquide | Procede et dispositif de traitement de surface par plasma a pression atmospherique |
| ES2372155T3 (es) * | 1999-04-13 | 2012-01-16 | Redco S.A. | Productos conformados con fibras de cemento y fibras de refuerzo para dichos productos, y procedimiento de tratamiento de dichas fibras. |
| FR2849064B1 (fr) * | 2002-12-20 | 2006-11-03 | Saint Gobain Mat Constr Sas | Fibre de renforcement en polyolefine, utilisation et produits comprenant la fibre |
| WO2005105696A2 (fr) * | 2004-04-28 | 2005-11-10 | Saint-Gobain Vetrotex France | Procede de traitement de surface de fibres de renforcement |
-
2005
- 2005-11-10 FR FR0553433A patent/FR2893037B1/fr not_active Expired - Fee Related
-
2006
- 2006-11-08 US US12/092,210 patent/US20090305038A1/en not_active Abandoned
- 2006-11-08 WO PCT/FR2006/051150 patent/WO2007057595A2/fr not_active Ceased
- 2006-11-08 KR KR1020087011259A patent/KR101414431B1/ko not_active Expired - Fee Related
- 2006-11-08 BR BRPI0618462-6A patent/BRPI0618462B1/pt not_active IP Right Cessation
-
2008
- 2008-05-08 ZA ZA200803917A patent/ZA200803917B/xx unknown
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9023452B2 (en) | 2011-09-06 | 2015-05-05 | Honeywell International Inc. | Rigid structural and low back face signature ballistic UD/articles and method of making |
| US9023450B2 (en) | 2011-09-06 | 2015-05-05 | Honeywell International Inc. | High lap shear strength, low back face signature UD composite and the process of making |
| US9023451B2 (en) | 2011-09-06 | 2015-05-05 | Honeywell International Inc. | Rigid structure UHMWPE UD and composite and the process of making |
| US9163335B2 (en) | 2011-09-06 | 2015-10-20 | Honeywell International Inc. | High performance ballistic composites and method of making |
| US9168719B2 (en) | 2011-09-06 | 2015-10-27 | Honeywell International Inc. | Surface treated yarn and fabric with enhanced physical and adhesion properties and the process of making |
| US9222864B2 (en) | 2011-09-06 | 2015-12-29 | Honeywell International Inc. | Apparatus and method to measure back face signature of armor |
| US9718237B2 (en) | 2011-09-06 | 2017-08-01 | Honeywell International Inc. | Rigid structure UHMWPE UD and composite and the process of making |
| US9821515B2 (en) | 2011-09-06 | 2017-11-21 | Honeywell International Inc. | High lap shear strength, low back face signature UD composite and the process of making |
| US9880080B2 (en) | 2011-09-06 | 2018-01-30 | Honeywell International Inc. | Rigid structural and low back face signature ballistic UD/articles and method of making |
| US10562238B2 (en) | 2011-09-06 | 2020-02-18 | Honeywell International Inc. | High lap shear strength, low back face signature UD composite and the process of making |
| US11027501B2 (en) | 2011-09-06 | 2021-06-08 | Honeywell International Inc. | High lap shear strength, low back face signature UD composite and the process of making |
| WO2026003468A1 (fr) * | 2024-06-27 | 2026-01-02 | Compagnie Generale Des Etablissements Michelin | Procédé d'amélioration de la résistance aux alcalins d'un support |
| FR3163933A1 (fr) * | 2024-06-27 | 2026-01-02 | Compagnie Generale Des Etablissements Michelin | Procédé d’amélioration de la résistance aux alcalins d’un support |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2893037A1 (fr) | 2007-05-11 |
| ZA200803917B (en) | 2009-02-25 |
| KR20080075499A (ko) | 2008-08-18 |
| BRPI0618462A2 (pt) | 2011-08-30 |
| KR101414431B1 (ko) | 2014-08-05 |
| WO2007057595A3 (fr) | 2007-11-08 |
| BRPI0618462B1 (pt) | 2018-01-30 |
| FR2893037B1 (fr) | 2012-11-09 |
| US20090305038A1 (en) | 2009-12-10 |
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