FR2465817A1 - Needle-felt for deep-draw moulding - contains proportion of fibres which are highly extensible at elevated temp. - Google Patents
Needle-felt for deep-draw moulding - contains proportion of fibres which are highly extensible at elevated temp. Download PDFInfo
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- FR2465817A1 FR2465817A1 FR8020036A FR8020036A FR2465817A1 FR 2465817 A1 FR2465817 A1 FR 2465817A1 FR 8020036 A FR8020036 A FR 8020036A FR 8020036 A FR8020036 A FR 8020036A FR 2465817 A1 FR2465817 A1 FR 2465817A1
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Classifications
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
- D04H1/48—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0202—Separation of non-miscible liquids by ab- or adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/08—Thickening liquid suspensions by filtration
- B01D17/10—Thickening liquid suspensions by filtration with stationary filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
- B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
- B01D39/163—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin sintered or bonded
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
- D04H1/48—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation
- D04H1/488—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation in combination with bonding agents
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
- D04H1/64—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/12—Special parameters characterising the filtering material
- B01D2239/1291—Other parameters
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Dispersion Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Filtering Materials (AREA)
- Nonwoven Fabrics (AREA)
Abstract
Description
La présente invention concerne un procédé de fabrication d'une pièce préfabriquée emboutie à partir d'un non-tissé. The present invention relates to a method of manufacturing a prefabricated stamped part from a nonwoven.
Pour des cas d'application déterminés de produits textiles en nappes, on désire des propriétés d'aptitude à liembou- tissage. Par exemple, des filtres en étoffe ou en voiles, comme on en utilise dans les ventilateurs, sont fixés habituellement par des cadres en tissu, mati ère plastique ou métal. Ces filtres ont l'inconvénient d'avoir un effet de ventilation faible, parce que la surface qu'ils ncowrent est relativement petite. Outre une efficacité faible, il peut se produire après colmatage une surcharge du moteur du ventilateur. For specific cases of application of textile products in the form of plies, desirability of embossing is desired. For example, fabric or web filters, as used in fans, are usually attached by fabric, plastic, or metal frames. These filters have the disadvantage of having a weak ventilation effect, because the surface that they absorb is relatively small. In addition to low efficiency, it can occur after clogging an overload of the fan motor.
On a déjà essayé de surmonter ces difficultés par l'utilisation de matériau filtrant embouti à base de nappes de fibres. We have already tried to overcome these difficulties by using stamped filter material based on fiber webs.
Mais on a constaté que ces matériaux ne se pirataient que d'une façon insuffisante aux contraintes mécaniques agissant sur eux pendant la phase d'emboutissage et qu'il se produisait notamment dans les zones allongées l'excès une rupture des fibres ou des zones de liant qui relient ensemble les fibres. Outre une stabilité de forme insuffisante, il en résultait d'importes inégalités excluant l'utilisation de matériaux de ce genre, par exemple dans le domaine de la technique des filtres.However, it has been found that these materials pirated only insufficiently to the mechanical stresses acting on them during the stamping phase and that, in the elongated zones, there occurred in particular excess fiber breakage or binder that connects the fibers together. In addition to insufficient shape stability, this resulted in large inequalities excluding the use of such materials, for example in the field of filter technology.
Le but de l'invention est de développer un nontissé qui, avec la garantie d'une bonne uniformité, puisse être embouti avec un rapport d'étirage par unité de surface de plus de 200 %. Par l'expression rapport d'étirage par unité de surface, on entend le quotient, multiplié par 100, de la surface de la partie emboutie par la surface du matériau utilisé. The object of the invention is to develop a nonwoven which, with the guarantee of good uniformity, can be stamped with a drawing ratio per unit area of more than 200%. The expression stretching ratio per unit area is understood to mean the quotient, multiplied by 100, of the area of the stamped part by the area of the material used.
Le moyen selon l'invention d'atteindre ce but consiste en ce qu'on ajoute au non-tissé au moins 10 %, par rapport au poids des fibres, de fibres étirables avec un allongement à la rupture d'au moins 100 % 1500 en dessous du point de fusion, en ce que le non-tissé est renforcé par un aiguilletage, et en ce qu'il est embouti après un préchauffage a une température de plus de 1500C en dessous du point de fusion. The means according to the invention for achieving this aim consists in adding to the nonwoven at least 10%, relative to the weight of the fibers, of stretchable fibers with an elongation at break of at least 100% 1500 below the melting point, in that the nonwoven is reinforced by needling, and in that it is stamped after preheating to a temperature of more than 1500C below the melting point.
Il est d'une importance essentielle que la nappe de fibre possède au moins 10 % en poids, par rapport à la quantité totale de fibres, de fibres ayant un allongement à la rupture de 100 % ou davantage à une température qui se trouve à 1500C en dessous du point de fusion, et que la nappe soit aiguilletée.Parmi les fibres disponibles dans le commerce, avec les propriétés nécessaires, on trouve par exemple "Kanekalon H.E." (marque de fabrique) de Kanegafuchi Chemical Industry Corporation, une fibre de copolymère de chlorure d'acrylonitrîle-polyvinyle; "Tetoron T-211" (marque de fabrique) de Toray Industries, Inc., fibre de polyester non étiré; "Nylon" (marque de fabrique) de DuPont, 6.6 Nylon; et '9acier MP" (marque de fabrique) de Wacker Chemie SARL, un copolymère d'acétate de polyvinyle et de chlorure de polyvinyle. It is of essential importance that the fiber web has at least 10% by weight, based on the total amount of fibers, of fibers having an elongation at break of 100% or more at a temperature of 1500C below the melting point, and the web is needled. Among the commercially available fibers, with the necessary properties, there is for example "Kanekalon HE" (trademark) of Kanegafuchi Chemical Industry Corporation, a fiber of acrylonitrile-polyvinyl chloride; "Tetoron T-211" (trademark) of Toray Industries, Inc., unstretched polyester fiber; "Nylon" (trademark) of DuPont, 6.6 Nylon; and '9acier MP "(trademark) from Wacker Chemie SARL, a copolymer of polyvinyl acetate and polyvinyl chloride.
Le choix des composants restants du non-tissé déformable est orienté par l'utilisation du produit final. Par exemple, si le produit final est un filtre pour une installation climatique, il est souhaitable que le non-tissé contienne 30 % ou davantage d'une fibre thermoplastique coupe-feu. Si le non-tissé sert à la séparation huile/eau, le non-tissé devrait contenir au moins 20 % d'une fibre thermoplastique présentant une bonne résistance à l'huile. Le nontissé de la composition indiquée est ensuite aiguilleté avec une densité de 10 à 300 piqûres par Cm2 > et lton obtient un non-tissé renforcé dont les fibres sont disposées de préférence dans le sens de l'épaisseur de la nappe.Si l'on désire une stabilité dimensionnelle encore plus élevée, le non-tissé peut être vaporisé ou recouvert à l'aide d'une émulsion thermoplastique de liant. The choice of the remaining components of the deformable nonwoven is guided by the use of the final product. For example, if the end product is a filter for a climate system, it is desirable that the nonwoven contains 30% or more of a fire-resistant thermoplastic fiber. If the nonwoven is used for oil / water separation, the nonwoven should contain at least 20% of a thermoplastic fiber having good oil resistance. The nonwoven of the composition indicated is then needled with a density of 10 to 300 bites per Cm2> and lton obtains a reinforced nonwoven whose fibers are preferably arranged in the direction of the thickness of the sheet. wants even higher dimensional stability, the nonwoven can be sprayed or covered with a thermoplastic binder emulsion.
Un non-tissé pour installation climatique est aiguilleté de préférence avec une densité de 10 à 100 piqûres au 2 cm . Dans le cas de non-tissé pour la séparation huile/eau , la
2 densité optimale atteint de 15 à 300 piqûres par cm . Dans ce dernier cas, les non-tissés ont de préférence une forme de pot. Il est alors avantageux que la densité du non-tissé soit choisie plus petite à l'intérieur qu'à l'extérieur. Ainsi, les propriétés de filtration sont améliorées.A nonwoven for climatic installation is preferably needled with a density of 10 to 100 bites per 2 cm. In the case of nonwoven for oil / water separation, the
2 optimal density reached from 15 to 300 bites per cm. In the latter case, the nonwovens preferably have a pot shape. It is then advantageous for the density of the nonwoven to be chosen to be lower inside than outside. Thus, the filtration properties are improved.
Le non-tissé peut être renforcé en outre par un liant thermoplastique ou réticule chimiquement. Le type utilisé d'émulsion, de dispersion ou de poudre pour le liant se détermine d'après lesconditions auxquelles est soumis le non-tissé pendant l'emboutissage et l'utilisation finale. The nonwoven can be further reinforced with a thermoplastic binder or chemically crosslinked. The type of emulsion, dispersion or powder used for the binder is determined according to the conditions to which the nonwoven is subjected during stamping and end use.
Par exemple, si le produit final est un filtre pour installation climatique, on choisit soit une émulsion thermoplastique qui agit comme coupe-feu, soit une émulsion de liant ou une poudre de liant avec addition de résine coupe-feu. Si le matériau a former doit être utilisé comme filtre pour la séparation huile/eau, on choisit une résine résistant à l'huile comme le chloroprène, l'acrylonitrile, l'uréthanne ou la résine acrylique. Pour une dureté croissante du liant, on obtient une stabilité de forme croissante du non-tissé embouti. En cas d'utilisation d'un liant avec des propriétés élastiques, comme par exemple il est facile d'en obtenir avec les uréthannes, on obtient une liaison souple des fibres aux points de liaison. Cette liaison souple agit favorablement sur une aptitude sans dommage du non-tissé à l'emboutissage. For example, if the final product is a filter for climatic installation, we choose either a thermoplastic emulsion which acts as a fire barrier, or a binder emulsion or a binder powder with addition of fire resistant resin. If the material to be formed is to be used as a filter for oil / water separation, an oil resistant resin such as chloroprene, acrylonitrile, urethane or acrylic resin is chosen. For an increasing hardness of the binder, an increasing shape stability of the drawn nonwoven is obtained. If a binder with elastic properties is used, such as it is easy to obtain with urethanes, a flexible bonding of the fibers is obtained at the bonding points. This flexible connection acts favorably on a non-woven ability of the nonwoven to be drawn.
Un non-tissé prévu pour la séparation huile/eau devrait être traité en outre avec un moyen hydrofuge résistant bien à l'huile. Des moyens hydrofuges convenables sont à base de fluor ou de silicone. A nonwoven intended for oil / water separation should also be treated with a water repellant resistant to oil. Suitable water-repellent means are based on fluorine or silicone.
Le non-tissé obtenu de la manière décrite est préchauffé à une température comprise entre 0 à 1500C en dessous du point de fusion des fibres avec un allongement à la rupture de 100 7 ou davantage à une température de 1500C. A la suite de ce préchauffage, le non-tissé est embouti en utilisant un procédé d'emboutissage sous vide ou à la presse, des matrices d'un montage particulier étant utilisées dans les deux cas. Après le refroidissement, la pièce moulée utilisable peut être enlevée. Elle se distingue par la proportion d'au moins 10 % de fibres hautement étirables, donc très résistantes au déchirement, ainsi que, par suite du renforcement par un processus d'aiguilletage, par une uniformité et une stabilité de forme particulièrement bonnes. Le rapport d'allongement par unité de surface peut être supérieur à 200 %. The nonwoven obtained in the manner described is preheated to a temperature between 0 to 1500C below the melting point of the fibers with an elongation at break of 100 7 or more at a temperature of 1500C. Following this preheating, the nonwoven is stamped using a vacuum or press stamping process, dies of a particular assembly being used in both cases. After cooling, the usable molded part can be removed. It is distinguished by the proportion of at least 10% of highly stretchable fibers, therefore very resistant to tearing, as well as, as a result of the reinforcement by a needling process, by a particularly good uniformity and shape stability. The aspect ratio per unit area can be greater than 200%.
D'autres caractéristiques et avantages de l'invention seront mieux compris à la lecture de la description qui va suivre d'un exemple de réalisation et en se reportant aux dessins annexés sur lesquels
- la figure 1 représente un non-tissé constitué de deux couches avant l'emboutissage;
- la figure 2 représente le non-tissé de la figure 1 en coupe après l'emboutissage; et
- la figure 3 représente en perspective le nontissé de la figure 2 faisant partie d'un filtre pour une installation climatique.Other characteristics and advantages of the invention will be better understood on reading the following description of an exemplary embodiment and with reference to the accompanying drawings in which
- Figure 1 shows a nonwoven consisting of two layers before stamping;
- Figure 2 shows the nonwoven of Figure 1 in section after stamping; and
- Figure 3 shows in perspective the nonwoven of Figure 2 forming part of a filter for a climate system.
Le non-tissé de la figure 1 se compose de deux couches 1 et 2 reliées ensemble, possédant sensiblement la même constitution et contenant chacune au moins 10 %, en poids de fibre, de fibres étirables avec un allongement à la rupture d'au moins 100 % à 1500C en dessous du point de fusion. La couche 2 est imprégnée en outre d'un produit hydrofugre à base de fluor. L'eau arrivant par le haut est donc séparée par la couche 2, par exemple d'un courant d'huile et elle est retenue dans la couche 1 d'où elle peut être évacuée par un lavage à contre-courant. The nonwoven of Figure 1 consists of two layers 1 and 2 connected together, having substantially the same constitution and each containing at least 10%, by weight of fiber, of stretchable fibers with an elongation at break of at least 100% at 1500C below the melting point. Layer 2 is further impregnated with a fluorine-based water repellant. The water arriving from above is therefore separated by layer 2, for example from an oil stream and it is retained in layer 1 from where it can be removed by a backwash.
Dans le cas d'un formage correspondant à la figure 2 et dans lequel au moins une partie de la surface active 3 s'étend parallèlement au sens d'écoulement du fluide à filtrer, il se forme éventuellement en outre dans la partie inférieure un bassin de décantation dans lequel peut être retenue la plus grande partie de l'eau à séparer. L'efficacité correspond en général à ce qui a été décrit ci-dessus. In the case of a forming corresponding to FIG. 2 and in which at least part of the active surface 3 extends parallel to the direction of flow of the fluid to be filtered, a basin is optionally formed in the lower part in which most of the water to be separated can be retained. The efficiency generally corresponds to what has been described above.
Si l'on impose des conditions encore plus sévères à la séparation, on peut introduire entre la couche intérieure 1 et la couche extérieure 2 une couche supplémentaire en un matériau absorbant l'eau. Une autre possibilité consiste à traiter la couche 1 avec un produit hydrophile. If even more severe conditions are imposed on the separation, an additional layer made of a water-absorbent material can be introduced between the inner layer 1 and the outer layer 2. Another possibility is to treat layer 1 with a hydrophilic product.
La figure 3 représente un filtre pour une installa tion de climatisation qui a été réalisée d'après le procédé proposé. FIG. 3 represents a filter for an air conditioning installation which has been produced according to the proposed method.
Le non-tissé 4 à une couche contient plusieurs empreintes 5 réalisées par emboutissage. Les empreintes 5 sont remplies de matériau 6, par exemple de produit absorbant pour les odeurs désagréables. A ce produit, on peut ajouter en outre des matières bactéricides. La pièce en forme est recouverte sur le dessus par un voile mince 7 perméable à l'air, qui est collé au voisinage de la zone marginale sur le voile embouti 4. The one-layer nonwoven 4 contains several imprints 5 produced by stamping. The imprints 5 are filled with material 6, for example an absorbent product for unpleasant odors. In addition, bactericidal materials can be added to this product. The shaped part is covered on top by a thin air-permeable veil 7, which is glued in the vicinity of the marginal zone on the stamped veil 4.
Exemple 1
Un non-tissé qui contient 40 parties de fibres 20 d/ 76 mu en poly(chlorure de vinyle/acrylonitrile), 30 parties de fibres 15d/56 mu en polyester et 30 parties de fibres 6d/52 mu en polyoîéfine- polyéthylène a été aiguilleté par une disposition d'aiguilles an mosaïque 15 x 18 x 32 x 31/2. La profondeur de pénétration des aiguil 2 les était de 10 mu et leur densité de 30 piqûres par cm . La nappe aiguilletée a été imprégnée à l'aide d'un rouleau par un latex de chlorure de polyvinylidène, de façon à obtenir finalement un non-tissé d'une d'une densité superficielle de 100 g par m , possédant une épaisseur de 1,5 mu. Ce non-tissé a été chauffé moins de 1 minute à 1300C et soumis ensuite à un emboutissage dans une matrice circulaire.La matrice contient des empreintes ou des saillies jusqu'à une profondeur de 5 cm. La pièce obtenue résiste au feu, présente une aptitude élevée au formage, estpeu sensible à la pression et possède la perméabilité élevée nécessaire pour le filtrage. Quand on la fixe par un cadre simple sur un ventilateur, on obtient un filtre bien formé.Example 1
A nonwoven which contains 40 parts of 20 d / 76 μm poly (vinyl chloride / acrylonitrile) fibers, 30 parts of 15d / 56 μ polyester fibers and 30 parts of 6d / 52 mu polyolefin-polyethylene fibers has been needled by a mosaic needle arrangement 15 x 18 x 32 x 31/2. The penetration depth of needle 2 les was 10 mu and their density of 30 bites per cm. The needled sheet was impregnated with a roller with a polyvinylidene chloride latex, so as to finally obtain a nonwoven having a surface density of 100 g per m, having a thickness of 1 , 5 mu. This nonwoven was heated for less than 1 minute at 1300C and then subjected to stamping in a circular matrix.The matrix contains impressions or protrusions to a depth of 5 cm. The part obtained resists fire, has a high formability, is not very sensitive to pressure and has the high permeability necessary for filtering. When you fix it with a simple frame on a fan, you get a well-formed filter.
Exemple 2
Un non-tissé de 50 parties de fibres de polyester non étirées de 1,5 d/51 mm, 20 parties de fibres 4 d/51 mu en polyacrylonitrile et 30 parties de fibres 3 d/51 mu en polyamide a été 2 aiguilleté selon une densité de 100 piqûres par cm cm2, de façon à obtenir une nappe aiguilletée ayant une densité superficielle de 500 g/cm2. La nappe a été imprégnée d'un latex de chloroprène, le rapport fibre sur résine étant de 60/40. La nappe a ensuite été traitée avec un produit hydrofuge à base de fluor. La densité superficielle 2 a été ainsi augmentée de 8 g/m . La nappe est ensuite amenée pendant 3 secondes à 1300C et ensuite elle est emboutie, pour donner la pièce désirée, dans une matrice cylindrique avec des cavités et des saillies.Example 2
A nonwoven of 50 parts of unstretched polyester fibers of 1.5 d / 51 mm, 20 parts of 4 d / 51 mu fibers of polyacrylonitrile and 30 parts of 3 d / 51 mu fibers of polyamide was 2 needled according to a density of 100 bites per cm cm2, so as to obtain a needled sheet having a surface density of 500 g / cm2. The sheet was impregnated with a chloroprene latex, the fiber to resin ratio being 60/40. The sheet was then treated with a water-based fluorine-based product. The surface density 2 was thus increased by 8 g / m. The sheet is then brought for 3 seconds to 1300C and then it is stamped, to give the desired part, in a cylindrical matrix with cavities and projections.
La pièce obtenue a été utilisée pour filtrer un mélange huile-eau avec une proportion de 10 % d'eau. Le filtrat ne contenait plus qu'une petite quantité d'eau. On a constaté que le traitement du matériau du filtre par des produits hydrofuges était essentiel pour le résultat de la séparation. The part obtained was used to filter an oil-water mixture with a proportion of 10% of water. The filtrate contained only a small amount of water. It has been found that the treatment of the filter material with water repellents is essential for the result of the separation.
Bien entendu diverses modifications peuvent être apportées par l'homme de l'art aux dispositifs ou procédés qui viennent d'être décrits uniquement à titre d'exemples non limitatifs sans sortir du cadre de l'invention. Of course, various modifications can be made by those skilled in the art to the devices or methods which have just been described only by way of nonlimiting examples without departing from the scope of the invention.
Claims (4)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11982279A JPS5643457A (en) | 1979-09-18 | 1979-09-18 | Production of nonwoven fabric molded article |
| DE19803029752 DE3029752A1 (en) | 1979-09-18 | 1980-08-06 | METHOD FOR PRODUCING A DRAWN MOLDED PART FROM A FIBER FIBER |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2465817A1 true FR2465817A1 (en) | 1981-03-27 |
| FR2465817B1 FR2465817B1 (en) | 1984-06-01 |
Family
ID=25787094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8020036A Granted FR2465817A1 (en) | 1979-09-18 | 1980-09-17 | Needle-felt for deep-draw moulding - contains proportion of fibres which are highly extensible at elevated temp. |
Country Status (4)
| Country | Link |
|---|---|
| ES (1) | ES495140A0 (en) |
| FR (1) | FR2465817A1 (en) |
| IT (1) | IT1174306B (en) |
| SE (1) | SE442216B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2510625A1 (en) * | 1981-04-06 | 1983-02-04 | Dresser Corp | MOLDABLE FIBROUS MAT, PRODUCT OBTAINED BY MOLDING THIS MAT, AND METHOD FOR THE PRODUCTION THEREOF |
| DE3151294A1 (en) * | 1981-12-24 | 1983-07-14 | Fa. Carl Freudenberg, 6940 Weinheim | "POLYPROPYLENE SPINN FLEECES WITH LOW FALL COEFFICIENTS" |
| DE3151322A1 (en) * | 1981-12-24 | 1983-07-14 | Fa. Carl Freudenberg, 6940 Weinheim | "METHOD FOR THE PRODUCTION OF POLYPROPYLENE SPINN FABRIC WITH LOW FALL COEFFICIENT" |
| FR2549418A1 (en) * | 1983-07-22 | 1985-01-25 | Peugeot Aciers Et Outillage | SEMI-PRODUCT FOR THE MANUFACTURE OF THERMOPLASTIC PIECES AND METHOD FOR MANUFACTURING THE SAME |
| FR2561577A1 (en) * | 1984-03-20 | 1985-09-27 | Isoroy Sa | FIBROUS MOLDABLE MATTRESS AND METHOD FOR MANUFACTURING THE SAME |
| FR2584942A1 (en) * | 1985-07-19 | 1987-01-23 | Dollfus Noack Sa | Filter felt for corrosive gases at elevated temperature |
| EP0352888A2 (en) * | 1988-07-26 | 1990-01-31 | International Paper Company | Filtration fabric produced by wet laid process |
| EP0469558A1 (en) * | 1990-08-02 | 1992-02-05 | Hoechst Aktiengesellschaft | Formable textil material and the shape of the mould obtained |
| EP0469559A1 (en) * | 1990-08-02 | 1992-02-05 | Hoechst Aktiengesellschaft | Formable textile materials and the shape of the mould obtained |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU53580A1 (en) * | 1966-05-04 | 1968-02-12 | ||
| GB1186607A (en) * | 1966-05-23 | 1970-04-02 | Schaeffler Teppichboden G M B | Covering Elements for Motor Vehicle Bodies |
| DE1660717A1 (en) * | 1951-01-28 | 1971-03-18 | Bayer Ag | Process for the production of dense, voluminous, thermally formed textile surfaces |
| FR2052711A5 (en) * | 1969-06-17 | 1971-04-09 | Kohjin Co | Heat shrinkable moulding fabrics for forming - using pvc-pva graft |
| GB1231263A (en) * | 1968-05-08 | 1971-05-12 |
-
1980
- 1980-09-16 SE SE8006473A patent/SE442216B/en not_active IP Right Cessation
- 1980-09-17 IT IT49687/80A patent/IT1174306B/en active
- 1980-09-17 FR FR8020036A patent/FR2465817A1/en active Granted
- 1980-09-17 ES ES495140A patent/ES495140A0/en active Granted
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1660717A1 (en) * | 1951-01-28 | 1971-03-18 | Bayer Ag | Process for the production of dense, voluminous, thermally formed textile surfaces |
| LU53580A1 (en) * | 1966-05-04 | 1968-02-12 | ||
| GB1186607A (en) * | 1966-05-23 | 1970-04-02 | Schaeffler Teppichboden G M B | Covering Elements for Motor Vehicle Bodies |
| GB1231263A (en) * | 1968-05-08 | 1971-05-12 | ||
| FR2052711A5 (en) * | 1969-06-17 | 1971-04-09 | Kohjin Co | Heat shrinkable moulding fabrics for forming - using pvc-pva graft |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2510625A1 (en) * | 1981-04-06 | 1983-02-04 | Dresser Corp | MOLDABLE FIBROUS MAT, PRODUCT OBTAINED BY MOLDING THIS MAT, AND METHOD FOR THE PRODUCTION THEREOF |
| DE3151294A1 (en) * | 1981-12-24 | 1983-07-14 | Fa. Carl Freudenberg, 6940 Weinheim | "POLYPROPYLENE SPINN FLEECES WITH LOW FALL COEFFICIENTS" |
| DE3151322A1 (en) * | 1981-12-24 | 1983-07-14 | Fa. Carl Freudenberg, 6940 Weinheim | "METHOD FOR THE PRODUCTION OF POLYPROPYLENE SPINN FABRIC WITH LOW FALL COEFFICIENT" |
| FR2549418A1 (en) * | 1983-07-22 | 1985-01-25 | Peugeot Aciers Et Outillage | SEMI-PRODUCT FOR THE MANUFACTURE OF THERMOPLASTIC PIECES AND METHOD FOR MANUFACTURING THE SAME |
| EP0133119A2 (en) * | 1983-07-22 | 1985-02-13 | ACIERS ET OUTILLAGE PEUGEOT Société dite: | Intermediate product to be used in the manufacture of plastics articles, and method of making it |
| EP0133119A3 (en) * | 1983-07-22 | 1985-03-13 | ACIERS ET OUTILLAGE PEUGEOT Société dite: | Intermediate product to be used in the manufacture of plastics articles, and method of making it |
| FR2561577A1 (en) * | 1984-03-20 | 1985-09-27 | Isoroy Sa | FIBROUS MOLDABLE MATTRESS AND METHOD FOR MANUFACTURING THE SAME |
| EP0158156A1 (en) * | 1984-03-20 | 1985-10-16 | ISOROY Société Anonyme dite: | Mouldable fibre mat and its manufacturing method |
| FR2584942A1 (en) * | 1985-07-19 | 1987-01-23 | Dollfus Noack Sa | Filter felt for corrosive gases at elevated temperature |
| EP0352888A2 (en) * | 1988-07-26 | 1990-01-31 | International Paper Company | Filtration fabric produced by wet laid process |
| EP0352888A3 (en) * | 1988-07-26 | 1990-10-24 | Veratec, Inc. | Filtration fabric produced by wet laid process |
| EP0469558A1 (en) * | 1990-08-02 | 1992-02-05 | Hoechst Aktiengesellschaft | Formable textil material and the shape of the mould obtained |
| EP0469559A1 (en) * | 1990-08-02 | 1992-02-05 | Hoechst Aktiengesellschaft | Formable textile materials and the shape of the mould obtained |
Also Published As
| Publication number | Publication date |
|---|---|
| IT8049687A0 (en) | 1980-09-17 |
| SE442216B (en) | 1985-12-09 |
| FR2465817B1 (en) | 1984-06-01 |
| ES8105417A1 (en) | 1981-06-01 |
| ES495140A0 (en) | 1981-06-01 |
| IT1174306B (en) | 1987-07-01 |
| SE8006473L (en) | 1981-03-19 |
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