WO2006087491A1 - Systeme d'attache pour fils de verre de renforcement - Google Patents
Systeme d'attache pour fils de verre de renforcement Download PDFInfo
- Publication number
- WO2006087491A1 WO2006087491A1 PCT/FR2006/050131 FR2006050131W WO2006087491A1 WO 2006087491 A1 WO2006087491 A1 WO 2006087491A1 FR 2006050131 W FR2006050131 W FR 2006050131W WO 2006087491 A1 WO2006087491 A1 WO 2006087491A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- thermoplastic
- son
- thermosetting
- link
- thermoplastic material
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
- C03C27/06—Joining glass to glass by processes other than fusing
- C03C27/10—Joining glass to glass by processes other than fusing with the aid of adhesive specially adapted for that purpose
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C13/00—Fibre or filament compositions
-
- 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
- Y10T428/249921—Web or sheet containing structurally defined element or component
-
- 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
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T428/252—Glass or ceramic [i.e., fired or glazed clay, cement, etc.] [porcelain, quartz, etc.]
Definitions
- the invention relates to the field of glass fibers, more particularly for use as reinforcement of matrices of the thermoplastic or thermosetting type, preferably thermoplastic. More particularly, the invention relates to the use of reinforcing glass son, for example roving or roving according to the English term, in continuous processes for manufacturing composite elements. In the following description, we speak indifferently wire, roving or roving.
- roving also called direct roving, consisting of a set of parallel filaments, assembled without torsion.
- the glass filaments obtained by mechanical stretching are not twisted but kept parallel to form a ribbon more or less wide and flattened.
- the base wire is coated during its production of a size having the main functions of reinforcing the protection of the wire against abrasion, maintain a connection between the filaments and ensure compatibility and good adhesion between the matrix and reinforcement during subsequent impregnation phases.
- the roving is generally after manufacture in ball with or without tube.
- the roving can be indoor or outdoor reeling.
- it is in the form of ball with inner reeling or reel when performing the unwinding from the outside, the presentation of the reel being most often with tube.
- the rovings can be divided into two main groups, namely: rovings for cutting, ie intended to be cut in subsequent operations, for example in projection methods , preform manufacturing, prepreg, continuous molding etc., and rovings for winding, ie intended after winding to be directly used without being cut in the subsequent process of manufacturing a composite part (for example in pultrusion processes) or downstream transformation of the roving
- the process according to the invention makes it possible to obtain a piecache between two glass threads, for example between two roving windings and thus the passage from one winding to another without stopping the manufacturing or processing process in which He took part.
- the wicks of the windings to be bonded are composed of a multitude of filaments.
- the two wicks are placed against each other over a length of about 10 cm, and the application of compressed air under pressure makes it possible to intermingle the two wicks between them and thus to obtain the link.
- the link is provided during a first step using the previous system.
- the difference comes from the fact that we then perform a wrapping of this initial link composed of intertwined locks, with another element such as one or more textile threads, for example polypropylene or polyamide.
- the wrapping performed allows on the one hand to protect the link against abrasion and on the other hand to significantly increase its tensile strength.
- a "simple" intermingling of the filaments of the two strands of glass fibers bonded together gives rise to tensile strength at the bond level of less than 40% of the tensile strength of the fiberglass strand. itself, ie without the said link.
- the tensile strength obtained is most often of the order of 30% of the strength of the fiber.
- the second method in which an additional wrapping is carried out does not make it possible to improve the tensile strength in proportions sufficient to allow use in the methods previously described.
- it has been possible to measure that tensile strength of the link only achieves at best 45% of the tensile strength of the initial thread.
- This over-thickness can lead to breakage of the link in glass-fiber processing processes requiring a certain path of it during its processing, for example between rollers of a binder or in dies, in particular when getting the composite.
- this problem is particularly critical in a Hot-Melt process as described above, during passage of the link in the fiber impregnation die matrix, die whose diameter is most often close to double the thickness of the initial wick of a fiberglass winding.
- These free filaments are sources of breakage of filaments and initiation of breakage of the link for example when passing on the rollers or in impregnation dies.
- these filaments accumulate later in the impregnation die, are then a source additional abrasion of the fiber and locally change the viscosity of the molten plastic material.
- the wrapping carried out according to the second method around the link obtained by intermingling of the filaments makes it possible to limit the presence of the free filaments at the ends of the links.
- this wrapping increases again the thickness of the link at the splice and does not in principle to obtain a regular thickness of the link, the operation to be usually manual.
- the present invention relates, according to a first aspect, to a process for obtaining a link that can be used in all of the continuous fiberglass transformation processes without encountering the previously described problems relating to the bonding of the glass fibers, that is, responding to all the mechanical, physical and chemical constraints imposed by said methods.
- the present invention relates to a method of bonding between the ends of at least two glass or roving wires, in which said ends are impregnated with a material comprising a thermoplastic or thermosetting material or with a mixture a thermoplastic material and a thermosetting material in an overlap zone calibrated by calibration means such as a mold / counter-mold assembly, said material being introduced into the calibration means in a molten form or in a form solid, said material and the ends of the son being then subjected in the overlap zone to at least partial and preferably total melting means of the material.
- said melting means are for example included in the group of laser, electrical, infrared heating means and generally any heating means by convection, conduction or radiation.
- the present invention relates to a method of bonding between at least two glass yarns in which, on the ends of the yarns to be joined, in a covering zone, a fastener consisting of or comprising a thermoplastic material or thermosetting or a mixture of a thermoplastic material and a thermosetting material sensitive to ultrasound, then subjecting said catch and the ends of the son, in the area of recovery, to mechanical vibrations in the range of ultrasound whose frequency, l amplitude and duration allow at least partial and preferably total fusion of the hook and the junction of the son.
- a fastener consisting of or comprising a thermoplastic material or thermosetting or a mixture of a thermoplastic material and a thermosetting material sensitive to ultrasound
- ultrasound sensitive it is understood in the sense of the present description that the material itself absorbs ultrasound or comprises at least one ultrasonic absorbing component and heats under the action of such waves, in a proportion likely to cause the at least partial melting of the thermoplastic material.
- the piecing system obtained resulting from a process incorporating the addition of an additional material and preferably the use of an ultrasonic welding technology, makes it possible to obtain, according to the invention, a link of a "material” nature.
- composite link refers to an assembly whose structure is that of a composite material, that is to say characterized by a fiber / matrix coupling guaranteeing the desired mechanical properties.
- the link thus produced can be of very short length, does not generate free filaments at the ends of the link and has mechanical characteristics and thickness for its use in the previously described methods.
- thermoplastic matrices melted for example by the application of ultrasonic vibrations in the presence of glass filaments, makes it possible to generate at the level of the overlap zone a composite link comprising particularly resistant bonds and surprisingly enhanced mechanical properties.
- the invention thus makes it possible to obtain continuous yarns having a tensile strength that is slightly less but comparable to that of the initial fiberglass, that is to say without a link.
- the observed tensile strength values of the links according to the invention are greater than or equal to 70% of the tensile strength value of the roving itself, most often greater than or equal to 80% and more particularly close to or even greater than 85% when ultrasonic vibrations are used.
- the surprisingly high values of tensile strength of the continuous yarn incorporating the fastener according to the invention could be explained by an interaction. strong between at least one of the constituents of the sizing used in the manufacture of the roving and the thermoplastic material used.
- the molten thermoplastic material could react with one or more of the components of the sizing already present on the fiber, in particular the sticky systems of sizing, for example silane or its derivatives and thus allow, in addition to the mechanical catch, a chemical bond between the filaments, which contributes significantly to ⁇
- the improved mechanical properties of the link allow to greatly reduce the length, up to a length of the order of a few centimeters, for example 1 to 5 cm, or even of the order of a centimeter.
- the bonding of the glass fiber filaments to each other by the thermoplastic material makes it possible to avoid any presence of free filaments at the ends of the bond.
- the removal of the thermoplastic material takes place over a length slightly greater than that of the superposition of the two wicks of the windings thus joined.
- the use of an ultrasonic welding technology for obtaining the link also has many advantages:
- the strength of the composite bond between the glass fiber windings is further enhanced by the use of the ultrasonic welding technology applied to the fiberglass.
- ultrasonic technology melts the thermoplastic material very quickly and carries no risk both in terms of the achievement of links, the level of the human factor, that is to say the security of the operator.
- the joint use of ultrasound and a thermoplastic material that strongly reacts to ultrasonic stresses could allow a better grip due to: - the partial dissociation of the filaments constituting the resulting roving and the penetration of the molten matrix to the heart of the roving to surround the partially dissociated filaments, also under the effect of ultrasonic vibrations.
- the thermoplastic material is melted at least partially and preferably totally under the effect of vibrations at frequencies in the ultrasound range, generally between 20 and 100 kHz, preferably between 20 and 100 kHz, preferably between 20 and 100 kHz, preferably between 20 and 100 kHz, preferably between 20 and 100 kHz. and 40 kHz and amplitude very reduced and adapted according to the frequency used, not to break or crack the glass filaments.
- the amplitude is generally lower as the vibration frequency is high.
- the amplitude of vibration will typically be between 0.1 and 1 mm, preferably between 0.1 and 0.5 mm.
- the duration of the ultrasound treatment is of course chosen according to the frequency and the amplitude of the ultrasound and the time required under these conditions to melt at least partially and preferably completely the material.
- thermoplastic For an industrial application, it is in general of a few seconds, preferably of the order of one second.
- the welding by ultrasonic technology can be used to calibrate the thickness of the seal.
- a vibration device for generating vibrations at an ultrasonic frequency usually used for the realization of connection between plastic materials, such as those developed and marketed by the companies Rinco ultrasonic and Branson ultrasonic.
- the device comprises in known manner a sonotrode vibrated by a piezoelectric transducer.
- the piezoelectric allows the transformation of electrical energy into mechanical vibrations, in the range of ultrasound.
- the device used according to the invention is formed of two parts: a support machined and calibrated to present in a substantially central position a vein of substantially semicylindrical shape of defined radius and an upper portion, also comprising a vein of the same hemicylindrical shape.
- the two parts are mounted in such a way that the assembly of the support and of the upper part thus form a chute of cylindrical shape and of diameter substantially equal to the diameter of the link finally obtained.
- the support and the upper part of the device thus form a calibrated mold and counter-mold, making it possible to control the shape and the regularity of the link obtained.
- the method makes it possible to obtain a small and regular extra thickness which advantageously may be less than 2 times the thickness of the initial yarn.
- the upper part of the device is connected to a piezoelectric transducer for applying the ultrasonic wave to the portion of the fibers and the thermoplastic material to be melted.
- the thermoplastic material used is preferably selected according to the subsequent process of fiber transformation or composite manufacturing, for example taking into account the compatibility of said material with the matrices used in the transformation processes.
- thermoplastics used to make the link are selected to have a high compatibility with the matrix used in the composite and also a melting point slightly greater than this, for example greater than at least 5 0 C and preferably greater than at least 10 0 C, so that the link retains all of its qualities and characteristics when processing fiberglass.
- the thermoplastic material used as a bond comprises, for example, a matrix based on a polymer chosen from polypropylenes (PP), polyamides (PA), polyethylene terephthalate (PET) and polybutylene terephthalate (PBT), acrylonitrile-butadiene-styrenes (ABS).
- PP polypropylenes
- PA polyamides
- PET polyethylene terephthalate
- PBT polybutylene terephthalate
- ABS acrylonitrile-butadiene-styrenes
- thermoplastic materials are more or less sensitive to ultrasound, for example depending on the length of the molecular chains.
- the range of frequency and amplitude is adapted to the use of a thermoplastic material.
- Said thermoplastic material is itself adapted to its use as a link, according to well-known techniques of ultrasonic thermoplastic welding.
- the material in question advantageously has a shape that is particularly suitable for rapid use, that is to say a time of the weakest possible welding.
- the thermoplastic grip is of flat shape and of small thickness and width.
- the length of the hook is about 0.1 cm to 3 cm, and more precisely between 0.5 cm and 1 cm. Its width is advantageously greater than that of glass son welding to facilitate its implementation. The surplus is for example cut by the molds and against-mold used during the ultrasonic welding, and provided for this purpose.
- the thickness of the hook varies from 50 ⁇ m to 2 mm and preferably from 100 ⁇ m to 1 mm.
- connection between two windings of glass son roving form, diameter 17 microns and 2400 tex title was made using an ultrasonic vibration device marketed by Rinco ultrasonic and as previously described.
- the two ends or wicks of the windings were first superimposed over a length of 1 cm in contact with a thermoplastic material comprising a polypropylene matrix marketed by the company 3M under the reference Thermo-bond film 845 ® thickness l00 ⁇ m .
- the width of the hook was fixed in this example to 1 cm and its length to 2 cm, at the level of the hemispherical vein of the support.
- the assembly After positioning the upper part, the assembly is then subjected to ultrasonic waves of frequency 35 kHz with a vibration amplitude of 0.5 mm. Duration of treatment is 1 second. After treatment, a uniform link of length 1 cm ⁇ 2 mm and diameter substantially equal to or less than twice that of the initial wire is removed from the mold / counter-mold system. Visually no free glass filaments are observed at both ends of the link.
- Example 2 (Comparative): In this example, a roving of the same nature as that described in Example 1 was used, having no link. Tensile tensile stress was measured in the same way as in Example 1.
- Example 3 (Comparative): In this example, two son of the same nature as that described in Example 1 were connected over a length of 10 cm using the "air splice" technique of the prior art, previously described. Tensile tensile stress was measured in the same way as for Example 1. The diameter of the bond is 2.5 to 3 mm and does not have a regular appearance, due to the increase in volume wire due to the technique of using compressed air.
- Example 5 Air splice of the prior art previously described according to the same protocol, and the resulting link was covered by polyamide son to increase the tensile strength. The tensile stress at break was then measured in the same way as for Example 1.
- Example 5 Air splice of the prior art previously described according to the same protocol, and the resulting link was covered by polyamide son to increase the tensile strength. The tensile stress at break was then measured in the same way as for Example 1.
- the thickness of the thermoplastic / thermosetting adhesive is 0.15 mm.
- thermoplastic matrix has been introduced hot into a mold / counter-mold device in contact with the ends of the wires, as previously described.
- the material is introduced in liquid form by means of a "hot-melt” type deposit system (that is to say, to deposit the molten thermoplastic material).
- the material used is marketed by Nordson under the name “dispensing gun - classic hotmelt”.
- the thermoplastic used is a polypropylene, marketed in the form of powder, granules or rods.
- Table 1 gives the experimental values of tensile strength of the various yarns, obtained for the six examples previously described:
- Table 1 Value of the average tensile strength determined on various links
- the continuous yarn obtained according to the invention is extremely resistant to traction, the average value obtained being more than twice as high as that obtained for the air spice method and much higher than that obtained for the air spice method. + guipage ", whatever the method of impregnation of the fiber by the hook.
- the results obtained demonstrate the astonishing resistance of the link obtained according to the invention, compared with the resistance of the initial roving, without connection.
- Such characteristics allow, without fear of rupture of the continuous wire formed by rovings connected by fasteners according to the invention, an application of said continuous wire in the processes previously described and generally in all the processes in which the wire is subjected to a high voltage and / or a passage through a calibrated die.
- the bond thus produced can be of very short length and does not give rise to problems related to the presence of free filaments at the ends of the links between rovings.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Reinforced Plastic Materials (AREA)
- Joining Of Glass To Other Materials (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/816,048 US20080318020A1 (en) | 2005-02-15 | 2006-02-14 | Attachment System for Reinforcing Glass Yarns |
JP2007554621A JP2008529945A (ja) | 2005-02-15 | 2006-02-14 | 強化ガラス糸のための付属品システム |
EP06709510A EP1858818A1 (fr) | 2005-02-15 | 2006-02-14 | Systeme d'attache pour fils de verre de renforcement |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0550425 | 2005-02-15 | ||
FR0550425A FR2882049B1 (fr) | 2005-02-15 | 2005-02-15 | Systeme d'attache pour fils de verre de renforcement |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006087491A1 true WO2006087491A1 (fr) | 2006-08-24 |
Family
ID=35474686
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2006/050131 WO2006087491A1 (fr) | 2005-02-15 | 2006-02-14 | Systeme d'attache pour fils de verre de renforcement |
Country Status (6)
Country | Link |
---|---|
US (1) | US20080318020A1 (fr) |
EP (1) | EP1858818A1 (fr) |
JP (1) | JP2008529945A (fr) |
CN (1) | CN101119940A (fr) |
FR (1) | FR2882049B1 (fr) |
WO (1) | WO2006087491A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
MX2012001125A (es) * | 2009-07-29 | 2012-02-23 | Ppg Ind Ohio Inc | Mechas de fibra de vidrio empalmadas y procedimientos y sistemas para empalmar mechas de fibra de vidrio. |
EP3546627B1 (fr) * | 2017-12-11 | 2021-04-07 | Nitto Boseki Co., Ltd. | Corps lié de fil de fibre de verre |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0138326A1 (fr) * | 1983-08-19 | 1985-04-24 | RAYCHEM CORPORATION (a California corporation) | Méthode et composition pour la liaison de fibres optiques |
EP1312659A1 (fr) * | 2000-08-17 | 2003-05-21 | Nippon Sheet Glass Co., Ltd. | Composition adhesive et dispositif optique l'utilisant |
-
2005
- 2005-02-15 FR FR0550425A patent/FR2882049B1/fr not_active Expired - Fee Related
-
2006
- 2006-02-14 EP EP06709510A patent/EP1858818A1/fr not_active Withdrawn
- 2006-02-14 US US11/816,048 patent/US20080318020A1/en not_active Abandoned
- 2006-02-14 JP JP2007554621A patent/JP2008529945A/ja active Pending
- 2006-02-14 CN CNA2006800048822A patent/CN101119940A/zh active Pending
- 2006-02-14 WO PCT/FR2006/050131 patent/WO2006087491A1/fr active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0138326A1 (fr) * | 1983-08-19 | 1985-04-24 | RAYCHEM CORPORATION (a California corporation) | Méthode et composition pour la liaison de fibres optiques |
EP1312659A1 (fr) * | 2000-08-17 | 2003-05-21 | Nippon Sheet Glass Co., Ltd. | Composition adhesive et dispositif optique l'utilisant |
Also Published As
Publication number | Publication date |
---|---|
EP1858818A1 (fr) | 2007-11-28 |
US20080318020A1 (en) | 2008-12-25 |
FR2882049A1 (fr) | 2006-08-18 |
JP2008529945A (ja) | 2008-08-07 |
CN101119940A (zh) | 2008-02-06 |
FR2882049B1 (fr) | 2007-03-30 |
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