FR2719050A1 - Compsn. used to give sliding surfaces partic. for skis - Google Patents
Compsn. used to give sliding surfaces partic. for skis Download PDFInfo
- Publication number
- FR2719050A1 FR2719050A1 FR9405126A FR9405126A FR2719050A1 FR 2719050 A1 FR2719050 A1 FR 2719050A1 FR 9405126 A FR9405126 A FR 9405126A FR 9405126 A FR9405126 A FR 9405126A FR 2719050 A1 FR2719050 A1 FR 2719050A1
- Authority
- FR
- France
- Prior art keywords
- molecular weight
- hostalen
- composition according
- grams per
- per mole
- 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
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
- A63C5/00—Skis or snowboards
- A63C5/04—Structure of the surface thereof
- A63C5/056—Materials for the running sole
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
Abstract
Description
La présente invention concerne une composition destinée à la fabrication de surfaces de glissement, notamment de semelles de ski ou similaires. The present invention relates to a composition intended for the manufacture of sliding surfaces, in particular ski soles or the like.
Il est connu de réaliser des semelles de ski par extrusion de polyéthylène à haut poids moléculaire, ctest-à-dire dont la masse moléculaire ne dépasse généralement pas 5.105 grammes par mole, et reste en tout cas inférieure à 106 grammes par mole. It is known practice to produce ski soles by extrusion of high molecular weight polyethylene, that is to say the molecular weight of which does not generally exceed 5.105 grams per mole, and remains in any case less than 106 grams per mole.
Ce polyéthylène peut être extrudé dans des machines classiques, de type monovis, ce qui permet l'obtention de semelles ayant un court modéré. This polyethylene can be extruded in conventional machines, of the single-screw type, which makes it possible to obtain soles having a moderate short.
Toutefois, les qualités de glisse et de résistance, notamment à l'abrasion, de ces semelles sont moyennes voire faibles. However, the qualities of glide and resistance, in particular to abrasion, of these soles are medium or even low.
On connait également de réaliser ces semelles en polyéthylène dit "à ultra haut poids moléculaire", c'est-a-dire de masse moléculaire supérieure ou égale à 106 grammes par mole. It is also known to make these soles in so-called “ultra-high molecular weight” polyethylene, that is to say with a molecular mass greater than or equal to 106 grams per mole.
A cause de sa masse molaire et de sa viscosité élevées, l'écoulement de ce polyéthylène est très difficile voire impossible, ce qui empeche sa transformation par des procédés d'extrusion classiques. Because of its high molar mass and viscosity, the flow of this polyethylene is very difficult or even impossible, which prevents its transformation by conventional extrusion processes.
Pour cette raison, ce type de polyéthylène, qui se présente sous forme de poudre, est actuellement soit fritté par compactage de la poudre sous pression et température élevées, soit fondu et moulé à la forme désirée, soit usiné après compactage ou moulage.For this reason, this type of polyethylene, which is in powder form, is currently either sintered by compacting the powder under high pressure and temperature, or melted and molded into the desired shape, or machined after compaction or molding.
Ces procédés présentent les inconvénients d'être longs à mettre en oeuvre et de nécessiter une installation complexe et coûteuse, ce qui grève notablement le prix de revient des semelles. These methods have the drawbacks of being long to implement and of requiring a complex and expensive installation, which significantly increases the cost price of the soles.
La présente invention propose une composition de polymères pour la fabrication de surfaces de glissement, notamment de semelles de ski ou similaires, pouvant être extrudée sur des machines classiques et permettant d'obtenir, à un coût acceptable, des semelles présentant de bonnes caractéristiques de glisse et de résistance mécanique. The present invention provides a composition of polymers for the manufacture of sliding surfaces, in particular ski soles or the like, which can be extruded on conventional machines and which makes it possible to obtain, at an acceptable cost, soles having good sliding characteristics. and mechanical strength.
Cette composition comprend, d'une part, au moins une polyoléfine à haut poids moléculaire, c'est-à-dire ayant un poids moléculaire qui reste inférieur à 106 grammes par mole et, d'autre part, une polyoléfine A ultra haut poids moléculaire, c'est-à-dire ayant un poids moléculaire supérieur ou égal à 106 grammes par mole. This composition comprises, on the one hand, at least one high molecular weight polyolefin, that is to say having a molecular weight which remains less than 106 grams per mole and, on the other hand, an ultra high weight polyolefin A. molecular, that is to say having a molecular weight greater than or equal to 106 grams per mole.
Avantageusement, la composition comprend une proportion majoritaire de polyoléfine à haut poids moléculaire et une proportion minoritaire, au moins egale à 20 % en poids de la composition finale, de polyoléfine à ultra haut poids moléculaire. Advantageously, the composition comprises a major proportion of high molecular weight polyolefin and a minor proportion, at least equal to 20% by weight of the final composition, of ultra high molecular weight polyolefin.
Des essais ont en effet révélé que le mélange d'une polyoléfine à ultra haut poids moléculaire avec une polyoléfine à haut poids moléculaire tel que défini ci-dessus n'entrainait pas, de manière surprenante, d'augmentation du couple nécessaire à l'extrusion de la composition, notamment au-delà de la proportion de 15 % en poids précitée, et même une diminution de ce couple. Cette diminution pourrait être expliquée par la présence dans la composition d'une petite quantité de poudre de polyoléfine à ultra haut poids moléculaire qui reste à l'état non fondu et qui joue le rôle d'un lubrifiant sec. L'ajout, par exemple, de 10 à 30 % en poids de polyéthylène à ultra haut poids moléculaire à du polyéthylène à haut poids moléculaire permet d'améliorer sensiblement les propriétés de glisse et de résistance à l'abrasion des semelles extrudées à partir de telles compositions comparativement à celles obtenues uniquement à partir de polyéthylène à haut poids moléculaire (3.105 grammes par mole) classiquement extrudé, et ceci avec un accroissement de couple encore acceptable pour l'extrusion. Tests have in fact revealed that the mixing of an ultra-high molecular weight polyolefin with a high molecular weight polyolefin as defined above does not surprisingly lead to an increase in the torque necessary for the extrusion. of the composition, in particular beyond the aforementioned proportion of 15% by weight, and even a reduction in this torque. This decrease could be explained by the presence in the composition of a small amount of ultra-high molecular weight polyolefin powder which remains in the unmelted state and which acts as a dry lubricant. Adding, for example, 10 to 30% by weight of ultra high molecular weight polyethylene to high molecular weight polyethylene significantly improves the slip and abrasion resistance properties of soles extruded from such compositions compared to those obtained solely from conventionally extruded high molecular weight polyethylene (3.105 grams per mole), and this with an increase in torque which is still acceptable for extrusion.
Avantageusement, la composition comprend un polymère à cristaux liquides, de préférence à proportion de 3 à 12 % en poids de la composition finale. Advantageously, the composition comprises a liquid crystal polymer, preferably in a proportion of 3 to 12% by weight of the final composition.
L'addition d'un tel polymère à cristaux liquides à la composition permet de diminuer fortement la viscosité de celle-ci, et donc de faciliter notablement sa transformation. The addition of such a liquid crystal polymer to the composition makes it possible to greatly reduce the viscosity of the latter, and therefore to significantly facilitate its transformation.
De plus, les propriétés mécaniques des semelles obtenues sont grandement améliorées. En effet, d'une part, ce polymère à cristaux liquides constitue une phase de renforcement de la matrice thermoplastique et, d'autre part, l'extrusion de la composition conduit à la formation de fibrilles de ce polymère à cristaux liquides dans le sens de l'extrusion, et donc dans celui de la glisse. In addition, the mechanical properties of the soles obtained are greatly improved. In fact, on the one hand, this liquid crystal polymer constitutes a phase of reinforcement of the thermoplastic matrix and, on the other hand, the extrusion of the composition leads to the formation of fibrils of this liquid crystal polymer in the direction of the extrusion, and therefore in that of the glide.
L'exemple ci-dessous permet d'illustrer les avantages et caractéristiques de la composition selon l'invention, en référence au dessin schématique annexé, dans lequel
la figure 1 est un diagramme représentant l'évolution du couple de malaxage (en Nm) en fonction de l'évolution du taux pondéral de polyoléfine à ultra haut poids moléculaire dans trois compositions selon l'invention ; et
la figure 2 est un diagramme représentant l'évolution de la valeur du couple de malaxage (en Nm) en fonction de l'évolution du pourcentage de polymère à cristaux liquides dans trois compositions selon l'invention.The example below illustrates the advantages and characteristics of the composition according to the invention, with reference to the appended schematic drawing, in which
FIG. 1 is a diagram representing the change in the mixing torque (in Nm) as a function of the change in the weight content of ultra-high molecular weight polyolefin in three compositions according to the invention; and
FIG. 2 is a diagram showing the change in the value of the mixing torque (in Nm) as a function of the change in the percentage of liquid crystal polymer in three compositions according to the invention.
I1 a été préparé des compositions destinées à la fabrication de surfaces de glissement, notamment de semelles de ski ou similaires, par mélange des produits suivants
Composition 1 : le polyéthylène haute densité à poids moléculaire de 4,9.105 grammes par mole, vendu sous la dénomination "HOSTALEN GR7255", de la société HOECHST, et le polyéthylène haute densité à poids moléculaire de 4,4.106 grammes par mole, vendu sous la dénomination "HOSTALEN GUR212", de la société HOECHST ;
ComDosition 2 : ce même polyéthylène "HOSTALEN
GR7255" et le polyéthylène haute densité à poids moléculaire de 5,6.106 grammes par mole, vendu sous la dénomination "HOSTALEN GUR4131,, de la société HOECHST ;
ComDosition 3 : ce même polyéthylène "HOSTALEN
GR7255" et le polyéthylène haute densité à poids moléculaire de 8.106 grammes par mole, vendu sous la dénomination "HOSTALEN GUR416", de la société HOECHST.I1 have been prepared compositions intended for the manufacture of sliding surfaces, in particular ski soles or the like, by mixing the following products
Composition 1: high density polyethylene with a molecular weight of 4.9.105 grams per mole, sold under the name "HOSTALEN GR7255", from the company HOECHST, and high density polyethylene with a molecular weight of 4.4.106 grams per mole, sold under the name “HOSTALEN GUR212”, from the company HOECHST;
Composition 2: the same polyethylene "HOSTALEN
GR7255 "and high density polyethylene with a molecular weight of 5.6.106 grams per mole, sold under the name" HOSTALEN GUR4131 ,, from the company HOECHST;
Composition 3: the same polyethylene "HOSTALEN
GR7255 "and high density polyethylene with a molecular weight of 8.106 grams per mole, sold under the name" HOSTALEN GUR416 ", from the company HOECHST.
Des agents stabilisants anti-oxygène ont été ajoutés, à savoir 0,2 % en poids d"'IRGANOX" et 0,2 % d"'DLDTP", et l'ensemble a été mélangé à une température de 2400C. Anti-oxygen stabilizers were added, namely 0.2% by weight of "IRGANOX" and 0.2% of "DLDTP", and the whole was mixed at a temperature of 2400C.
L'évolution de la valeur du couple, déterminée après dix minutes de malaxage à 30 tours par minute, en fonction de l'évolution du pourcentage d'"HOSTALEN
GUR416", d"'HOSTALEN GUR413" ou d"'HOSTALEN GUR212" dans les trois compositions est représentée par les trois courbes de la figure 1.The evolution of the torque value, determined after ten minutes of mixing at 30 revolutions per minute, as a function of the evolution of the percentage of "HOSTALEN
GUR416 "," HOSTALEN GUR413 "or" HOSTALEN GUR212 "in the three compositions is represented by the three curves in figure 1.
Ces courbes montrent qu'en deça d'un taux d'environ 20 % à 30 % d'"HOSTALEN GUR416", à'HOSTALEN GUR413" ou d"'HOSTALEN GUR212", le couple croît avec l'augmentation de ce taux, du fait de la forte viscosité de ces polyéthylènes à ultra haut poids moléculaire. These curves show that below a rate of about 20% to 30% of "HOSTALEN GUR416", to 'HOSTALEN GUR413 "or"' HOSTALEN GUR212 ", the torque increases with the increase of this rate, due to the high viscosity of these ultra high molecular weight polyethylenes.
Au-delà de ce taux, de manière surprenante, il n'y a pas d'augmentation du couple et on peut même constater une diminution significative de celui-ci. Beyond this rate, surprisingly, there is no increase in torque and we can even see a significant decrease in it.
Les compositions obtenues peuvent s'écouler à 240OC et donc être extrudées dans des machines classiques. The compositions obtained can flow at 240OC and therefore be extruded in conventional machines.
La figure 2 montre l'évolution du couple de malaxage (en Nm) en fonction de l'évolution du taux pondéral de polymère à cristaux liquides vendu sous la dénomination "VECTRA A950", de la société HOESCHT, dans les trois compositions précitées, celles-ci comprenant 80 % d"'HOSTALEN GR7255" et 20 % d"'HOSTALEN GUR416", d' "HOSTALEN GUR413" ou d' "HOSTALEN GUR212". FIG. 2 shows the change in the mixing torque (in Nm) as a function of the change in the weight content of liquid crystal polymer sold under the name "VECTRA A950", from the company HOESCHT, in the three aforementioned compositions, those - here comprising 80% of "'HOSTALEN GR7255" and 20% of "' HOSTALEN GUR416", of "HOSTALEN GUR413" or of "HOSTALEN GUR212".
Les mélanges ont été réalisés dans les mêmes conditions que précédemment. The mixtures were carried out under the same conditions as above.
Pour un taux de 5 t de polymère à cristaux liquides, les courbes montrent une diminution importante et surprenante du couple nécessaire à l'extrusion des trois compositions, un taux de polymère à cristaux liquides compris entre 5 et 10 t permettant d'abaisser la valeur de couple de l'ordre de 35 à 40 %. For a level of 5 t of liquid crystal polymer, the curves show a significant and surprising reduction in the torque required for the extrusion of the three compositions, a level of liquid crystal polymer of between 5 and 10 t making it possible to lower the value. torque of the order of 35 to 40%.
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9405126A FR2719050B1 (en) | 1994-04-22 | 1994-04-22 | Composition intended for the manufacture of sliding surfaces, in particular ski soles or the like. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9405126A FR2719050B1 (en) | 1994-04-22 | 1994-04-22 | Composition intended for the manufacture of sliding surfaces, in particular ski soles or the like. |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2719050A1 true FR2719050A1 (en) | 1995-10-27 |
FR2719050B1 FR2719050B1 (en) | 1996-06-21 |
Family
ID=9462596
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR9405126A Expired - Fee Related FR2719050B1 (en) | 1994-04-22 | 1994-04-22 | Composition intended for the manufacture of sliding surfaces, in particular ski soles or the like. |
Country Status (1)
Country | Link |
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FR (1) | FR2719050B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1481712A1 (en) * | 2003-05-28 | 2004-12-01 | Ims Kunststoff Ag | Running surface for a winter sports apparatus, winter sports apparatus comprising such running surface, material composition for production of such running surface, use of a material additive to such running surface and method of manufacture of such running surface |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4281070A (en) * | 1980-01-07 | 1981-07-28 | The Polymer Corporation | Melt processable UHMWPE |
EP0117536A1 (en) * | 1983-02-23 | 1984-09-05 | Ramu International | A method of making a multiphase polyethylene structure, and a cross-country ski sole |
EP0318190A2 (en) * | 1987-11-13 | 1989-05-31 | Mitsui Petrochemical Industries, Ltd. | Polyolefin composition |
EP0340655A2 (en) * | 1988-05-02 | 1989-11-08 | HIMONT ITALIA S.r.l. | Compositions comprising thermally incompatible polymers |
-
1994
- 1994-04-22 FR FR9405126A patent/FR2719050B1/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4281070A (en) * | 1980-01-07 | 1981-07-28 | The Polymer Corporation | Melt processable UHMWPE |
EP0117536A1 (en) * | 1983-02-23 | 1984-09-05 | Ramu International | A method of making a multiphase polyethylene structure, and a cross-country ski sole |
EP0318190A2 (en) * | 1987-11-13 | 1989-05-31 | Mitsui Petrochemical Industries, Ltd. | Polyolefin composition |
EP0340655A2 (en) * | 1988-05-02 | 1989-11-08 | HIMONT ITALIA S.r.l. | Compositions comprising thermally incompatible polymers |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1481712A1 (en) * | 2003-05-28 | 2004-12-01 | Ims Kunststoff Ag | Running surface for a winter sports apparatus, winter sports apparatus comprising such running surface, material composition for production of such running surface, use of a material additive to such running surface and method of manufacture of such running surface |
Also Published As
Publication number | Publication date |
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FR2719050B1 (en) | 1996-06-21 |
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