WO2002053629A1 - Compose polymerique et methode de preparation du compose - Google Patents

Compose polymerique et methode de preparation du compose Download PDF

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Publication number
WO2002053629A1
WO2002053629A1 PCT/EP2001/015391 EP0115391W WO02053629A1 WO 2002053629 A1 WO2002053629 A1 WO 2002053629A1 EP 0115391 W EP0115391 W EP 0115391W WO 02053629 A1 WO02053629 A1 WO 02053629A1
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Prior art keywords
polymeric
fibres
polymeric compound
compound according
thermoplastic matrix
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PCT/EP2001/015391
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English (en)
Inventor
Maria Soliman
Vitor Manuel Carvalho Vila Verde
Marianne Sarkissova
Markus Johannes Henricus Bulters
Martin Antonius Van Es
Roelof Marissen
Wilhelmus Gerardus Marie Bruls
Johannes Fredericus Repin
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Dsm N.V.
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Publication of WO2002053629A1 publication Critical patent/WO2002053629A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
    • C08J5/046—Reinforcing macromolecular compounds with loose or coherent fibrous material with synthetic macromolecular fibrous material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment

Definitions

  • the invention relates to a polymeric compound, comprising a thermoplastic matrix and polymeric fibres.
  • Such a polymeric compound is known from US-A 3,639,424.
  • the known polymeric compound comprises a thermoplastic mouldable material and between 5 - 50 wt.% of staple-length polyethyleneterephtalate fibres having a denier between 1.5 and 25; the moulding temperature of the thermoplastic mouldable material is at least 25°C below the melting point of the fibres.
  • An additional essential feature in US-A 3,639,424 is that the fibres are heat set prior to use. Heat setting of the polymeric fibres is utilised to improve properties, in particular the dispersion of the polymeric fibres.
  • polypropylene (PP) and polyethylene (PE) are disclosed as thermoplastic mouldable material.
  • articles made from the known polymeric compound have a high impact strength, e.g. as expressed in notched Izod impact values.
  • Concrete notched Izod impact data at room temperature and at -40°C are given for a PP compound comprising 10 wt.% and 20 wt.% heat set polyethyleneterephtalate fibres.
  • the highest value as given in US-A 3,639,424 is still below 2 ft.lb/in (i.e. below 10 kJ/m 2 ).
  • Values as given for a PP without fibres are 0.41 ft.lb/in (i.e., about 2 kJ/m 2 ) at 23 °C, and 0.17 ft.lb/in (i.e., less than 1 kJ/m 2 ) at -40°C.
  • thermoplastic matrix has a high flow during melt processing
  • the polymeric compound comprises between 0.5 wt.% and 10 wt.% of a lubricant
  • the length of the polymeric fibres is between 0.1 mm and 50 mm.
  • the polymeric compound according to the invention has a high impact resistance. Said high impact resistance is, surprisingly, largely maintained at low temperatures, e.g. at -30°C or even at -40°C.
  • High impact resistance is defined herein as an impact resistance which, when measured at room temperature, is higher than the impact resistance of the thermoplastic matrix as such or higher than the impact resistance of polymeric compounds comprising the same thermoplastic matrix but not having a high flow, whichever of the two is the highest.
  • the impact resistance is measured according to ISO 180 (notched Izod impact) on an injection-moulded sample. With 'largely maintained at low temperatures' it is meant that the value of the impact resistance of an injection-moulded sample at -40°C is at least 40% of the value at room temperature, preferably at least 50%, more preferably at least 60%.
  • the polymeric compound according to the invention comprises a thermoplastic matrix.
  • the matrix materials as such are known.
  • the matrix is a polyolefin or a thermoplastic elastomer.
  • suitable polyolefin matrix materials are polyethylene (also comprising polyethylene copolymers such as octene- containing plastomers) and polypropylene (also comprising polypropylene copolymers).
  • the polyolefin matrix comprises polypropylene or high-density polyethylene.
  • Thermoplastic elastomers are known inter alia from Polymer Blends, Volume 2: Performance, edited by D.R. Paul and C.B. Bucknall, ISBN 0-471-35280-2, 2000.
  • thermoplastic elastomers on the basis of a thermoplastic polymer and a dynamically vulcanized rubber which is dispersed in a continuous phase of the thermoplastic polymer in the form of fine particles.
  • thermoplastic elastomers thermoplastic vulcanisates, hereinafter called TPV's
  • TPV's possess a number of properties of an elastomer and can be processed as a thermoplastic polymer.
  • the most widely used TPV's have a polyolefin or a styrenic block copolymer as the thermoplastic polymer.
  • thermoplastic polyolefin elastomers having a polyolefin as thermoplastic polymer in which the rubber component is not vulcanized
  • thermoplastic polyolefin elastomers can also be used as the thermoplastic matrix according to the invention.
  • TPV's and TPO's often comprise oils.
  • the beneficial effects of the polymeric compound according to the invention are mainly found in an improved abrasion resistance and in an improved tear strength.
  • thermoplastic matrix has, according to the invention, a high flow during melt processing. It was found that when the thermoplastic matrix does not have a high flow, the polymeric compound will not show a high impact resistance.
  • “High” flow during melt processing for a thermoplastic matrix comprising polypropylene or polyethylene or co-polymers thereof is expressed herein as being a Melt Flow Index (MFI in g/10 min) of the thermoplastic matrix at or above a threshold value.
  • Melt Flow Index MFI in g/10 min
  • the MFI thereof should be at or above the threshold value of 5 g/10 min, as measured according to ISO 1133 at 230°C and 2.16 kg.
  • the MFI is 12 g/10 min or higher, more preferably 20 g/10 min or higher.
  • the MFI thereof should be at or above the threshold value of 6 g/10 min, as measured according to ISO 1133 at 190°C and 2.16 kg, preferably 20 g/10 min or higher.
  • the melt viscosity ⁇ of the matrix as such should be at or below the threshold value of 200 Pa.s.
  • ⁇ is below 150 Pa.s, more preferably ⁇ is below 100 Pa.s.
  • the melt viscosity ⁇ as used herein is measured according to ISO 11443 at a shear rate y of 1000 s "1 and at a guideline temperature of 40°C above the melting temperature (Tm, determined via Differential Scanning Calorimetry (DSC) according to ISO 11357) of the thermoplastic matrix, or, in case melt temperature is not applicable due to the absence of a crystalline phase, at a temperature of 100°C above its glass transition temperature (T g , determined via Dynamic Mechanical Thermal Analysis (DMTA) according to ASTM D5279). If however the used processing temperature of the thermoplastic matrix is 20°C or more above the guideline temperature, then said processing temperature should be used for measuring ⁇ .
  • Tm melting temperature
  • T g Dynamic Mechanical Thermal Analysis
  • the limit of the MFI-range (or, a lower limit of the ⁇ -range) beyond which the objective of the present invention is no longer achieved was not found.
  • the limit of the MFI-range (or ⁇ -range) will therefore be determined by the practical availability of as well as the thermal stability of high-flow thermoplastic materials.
  • the MFI of the PP can be as high as 100 g/10 min or even 300 g/10 min or higher, although it is at present not expected that high-flow PP grades having an MFI as high as 1000 g/10 min will become available.
  • the thermoplastic matrix generally has a melt processing window.
  • the melt processing window is defined as being a temperature range within which it is possible to perform a melt processing step on the thermoplastic matrix.
  • the lower limit of the melt processing window is the melting temperature T m of the thermoplastic matrix, or, in case melt temperature is not applicable due to the absence of a crystalline phase, its glass transition temperature T g .
  • the upper limit of the melt processing window is the temperature at which, during the melt processing step, significant degradation of the thermoplastic matrix will occur. Significant degradation is evidenced by effects known to the person skilled in the art, in particular by discolouration.
  • the polymeric compound according to the invention comprises polymeric fibres. The polymeric fibres are chosen such that their thermal stability is sufficient so that they will remain essentially intact, e.g. not molten or degraded, during a melt processing step at temperatures above the lower limit of the melt processing window of the thermoplastic matrix.
  • compatibility and/or adhesion between the polymeric fibres and the thermoplastic matrix is not essential in order to achieve the benefits of the present invention, in particular regarding impact resistance and aesthetic properties. Accordingly, the enhancement of compatibility and/or adhesion between the polymeric fibres and the thermoplastic matrix, e.g. through a compatibiliser, specific fibre sizing, or exchange reactions between polymeric fibre and thermoplastic matrix during melt processing, is not essential either. Rather, it may be an additional benefit when the compatibility or adhesion between the polymeric fibres and the thermoplastic matrix is low or even non-existent. Also, it may be beneficial if the friction between the polymeric fibres and between the polymeric fibres and the thermoplastic matrix is low or reduced.
  • Heat setting of the polymeric fibres, prior to incorporation into the compound according to the invention, is not essential, although a heat setting step at a temperature below the T m or T g of the polymeric fibres may be beneficial.
  • a heat set step may for example be executed by exposing the polymeric fibres in air to a temperature below the T m or T g of the polymeric fibres during a short period of time, for example 5 minutes.
  • the amount of polymeric fibres comprised in the polymeric compound according to the invention is between 5 wt.% and 80 wt.%, based on the total weight of the polymeric compound.
  • the impact resistance of the polymeric compound according to the invention increases too. It was found that the increase of impact resistance with increasing amount of polymeric fibres was at least evident until 40 wt.% of polymeric fibres was added; but also adding an even higher percentage of polymeric fibres, 50 wt.% or even 60 wt.% or more, still yields polymeric compounds according to the invention showing high impact resistance.
  • the strength of the polymeric fibres comprised in the polymeric compound according to the invention may vary within wide limits, whereby it was found that the impact strength of polymeric compounds according to the invention increases with increasing tenacity of the polymeric fibres.
  • the tenacity of the polymeric fibres is defined as the maximum tensile strength that the polymeric fibres can withstand until they tear.
  • the tenacity of polymeric fibres is commonly expressed in milliNewton per tex (mN/tex), wherein "tex” is defined as the weight in grams (g) of 1000 metres of fibre.
  • the definitions of tenacity and tex as used herein are common general knowledge for persons skilled in the art of polymeric fibres, as disclosed in for example the Dictionary of Man-Made Fibers by Hans J. Koslowski (International Business Press Publishers, first edition 1998, ISBN 3-87150-583-8), pages 188-189.
  • the tenacity of the polymeric fibres in the polymeric compound according to the invention is 200 mN/tex or higher, more preferably 400 mN/tex or higher. It was found that the polymeric compound according to the invention shows the desired properties, in particular regarding impact resistance, if the length of the polymeric fibres is higher than 0.1 mm, preferably higher than 0.3 mm, more preferably higher than 2 mm.
  • the polymeric compound according to the invention when provided as granulate, it may be preferable to limit the length of the polymeric fibres to 50 mm, more preferably to 25 mm. Separately, it may be beneficial to limit the length of the polymeric fibre to less than 15 mm, because it was found that longer polymeric fibres may show a tendency to form bundles in the polymeric compound; although said bundles do not negatively influence the mechanical properties of articles made from the polymeric compound according to the invention, they may negatively influence their aesthetic character.
  • the diameter of the polymeric fibres comprised in the polymeric compound according to the invention may vary within wide limits.
  • the lower limit is determined by the practical availability of fibres rather than by their influence on properties.
  • the upper limit of the diameter of the polymeric fibres is determined by that diameter that no longer yields a polymeric compound having a high impact resistance.
  • the diameter of the fibres is between 1 ⁇ m and 100 ⁇ m, more preferably between 5 ⁇ m and 50 ⁇ m, most preferably between 6 ⁇ m and 30 ⁇ m. If the polymeric fibres are not round, and thus do not have a diameter, the cross section of the polymeric fibres should be within the corresponding cross section ranges as can be calculated from the abovementioned diameters.
  • the polymeric fibres comprised in the polymeric compound according to the invention should have sufficient thermal stability, so that they will remain essentially intact, e.g. not molten or degraded, during a melt processing step at temperatures above the lower limit of the melt processing window of the thermoplastic matrix.
  • the T m or T g of the polymeric fibres is at least 40°C, more preferably at least 60°C above the lower limit of the processing window of the thermoplastic matrix.
  • the polymeric fibres comprised in the polymeric compound according to the invention may comprise one of the following polymers: polyolefines, such as PE or PP, polyalkyleneterephtalates or polyalkylenenaphtalates (such as polyethyleneterephtalate or polybutyleneterephtalate), polyamides (such as polyamide- 6, polyamide-6.6 or polyamide-4.6), or polyacrylonitril.
  • polyolefines such as PE or PP
  • polyalkyleneterephtalates or polyalkylenenaphtalates such as polyethyleneterephtalate or polybutyleneterephtalate
  • polyamides such as polyamide- 6, polyamide-6.6 or polyamide-4.6
  • polyacrylonitril such as polyamide- 6, polyamide-6.6 or polyamide-4.6
  • the polymeric fibres comprised in the polymeric compound according to the invention comprise a polymer chosen from the group of polyalkyleneterephtalates, polyamide-6, polyamide-6.6, polyamide-4.6 and polyacrylonitril. It was found that a polymeric compound according to the invention comprising polymeric fibres from said group of polymers shows additional improvements in mechanical properties, in particular regarding stiffness. More preferably, the polymeric fibres comprised in the polymeric compound according to the invention preferably comprise polyethyleneterephtalate (PET). Compared to polyamide fibres, fibres comprising PET have a lower water absorption which makes processing easier. Also, compared to other polyalkyleneterephtalates such as polybutyleneterephtalate (PBT), the handling and processing is easier. PET fibres typically melt at temperatures of 250°C - 265°C.
  • the polymeric compound according to the invention comprises between 0.5 wt.% and 10 wt.% of a lubricant.
  • a lubricant is defined as a compound that, when present between two surfaces, reduces the friction between those surfaces. It is believed that a lubricant has beneficial effects on melt processing characteristics and on the aesthetic characteristics of articles made form polymeric compound according to the invention, while the mechanical properties such as impact resistance remain at a high level.
  • the lubricant is an oil. It was found that a wide variety of oils, such as ester oils, paraffinic oils and silicon oils are suitable.
  • the weight percentage of the lubricant in the polymeric compound may vary within a wide range. With increasing weight percentage, the benefits will typically increase, thereby outweighing any disadvantage that may occur, such as a decrease of stiffness. As indicated, between 0.5 wt.% and 10 wt.% of lubricant, preferably oil, is added, based on the total weight of the polymeric compound. Preferably, between 2.5 wt.% and 7.5 wt.% of lubricant is added.
  • the lubricant is essentially present on the interface between the fibres or filaments of the fibres and the thermoplastic matrix, although, depending on the chemical nature of the lubricant, diffusion of the lubricant from said interface into the thermoplastic matrix and/or the polymeric fibres may occur during melt processing, thereby causing a percentage of the lubricant to be present in the matrix and/or the polymeric fibre.
  • Articles made from polymeric compounds in which the lubricant is essentially present on the interface between the fibres or filaments of the fibres and the thermoplastic matrix were found to have improved surface aesthetic characteristics compared to polymeric compounds where the lubricant is evenly distributed throughout the polymeric compound, in that their surface is essentially bundle-free.
  • a bundle is defined as an agglomerate of at least 5 fibres, joined together over a length of more than 100 ⁇ m.
  • Essentially bundle-free is defined as showing less than 5, preferably less than 3 bundles per 100 cm 2 , as identified by visual and/or microscopic observation of an injection moulded article made from the polymeric compound according to the invention.
  • the polymeric compound according to the invention may also comprise fillers.
  • Fillers may be added to enhance certain mechanical properties such as stiffness.
  • examples of fillers are talc, wollastonite, glass fibres or glass beads.
  • talc is used as the filler.
  • the influence on mechanical properties is limited when talc is added in low weight percentages, the addition may still be useful, since talc also acts as a processing aid or as a nucleating agent.
  • Addition of very high percentages of talc may be useful for maximum enhancement of certain mechanical properties such as stiffness, or in case the polymeric compound is used as masterbatch.
  • a filler preferably talc
  • a filler preferably talc
  • the polymeric compound according to the invention may additionally comprise additives, such as processing aids, pigments, dyes, or UV stabilizers.
  • additives such as processing aids, pigments, dyes, or UV stabilizers.
  • the polymeric compound according to the invention may be prepared using any known technology comprising an impregnating step or a coating step. Examples of suitable known technologies are the so-called long fibre technologies such as pultrusion, powder coating, and wire coating. Using these technologies, impregnated or coated fibres are formed; these may then be granulated, which is typically done to make the compound according to the invention suitable for further processing into (semi)-finished articles.
  • the objective to provide processes for the preparation of said preferred embodiments is also achieved regarding those polymeric compounds that are used to prepare articles that are bundle-free in that the impregnated or coated polymeric fibres are subjected to a mixing step, said mixing step done at a temperature within the processing window of the thermoplastic matrix.
  • the impregnated or coated polymeric fibres will be granulated prior to the mixing step.
  • the mixing step may be executed using known methods, such as a single-screw extruder, a twin-screw extruder, a batch kneader or a mixing element in an injection moulding machine.
  • the mixing step should be mild: the equipment should be designed such that the polymeric fibres remain essentially of the same length, i.e. show negligible breakage, during the mixing step. If the mixing step is not sufficiently mild, the resulting polymeric compound will not show the desired combination of properties: in particular, an insufficiently mild mixing step will lead to a compound not having a high impact strength. In that case, the mixing step should be altered in such a way that the impact strength of the polymeric compound is high while still yielding articles that are essentially bundle-free.
  • the polymer compound according to the invention may be transformed into shaped (semi-)finished articles using a variety of processing techniques.
  • suitable processing techniques include injection moulding, injection compression moulding, in-mould decorating via injection moulding, extrusion, and extrusion compression moulding.
  • Injection moulding is widely used to produce articles such as for example automotive exterior parts like bumpers, automotive interior parts like instrument panels, or automotive parts under the bonnet.
  • Extrusion is widely used to produce articles such as rods, sheets and pipes.
  • the use of the polymeric compound according to the invention is beneficial in pipes: the combination of properties, including high impact resistance, may allow the production of thinner pipes having the same performance compared to pipes produced from known materials such as PP.
  • pipes having the same wall thickness may show enhanced performance like temperature resistance, pressure resistance, creep resistance or the resistance against crack propagation.
  • Determination of the notched Izod impact resistance was done according to ISO 180 4A; determination of the flexural modulus was done according to ASTM D790; determination of the tensile modulus was done according to ISO R37/2.
  • Falling dart impact was determined according to ISO 6603, whereby the dart had a diameter of 20 mm and a hemispherical tip, the total mass of dart plus additional weight was 22.63 kg, the dart falling from a height of 1 m, the samples having a thickness of 3.2 mm and not clamped.
  • wire coating was performed by means of a 30-mm single screw extruder (manufacturer Schwabenthan, screw L/D ratio of 25) that fed molten thermoplastic matrix material to a Unitika wire coating die having a die-hole of 2.5 mm.
  • the polymeric compound was taken out of the wire coating die by means of a strand puller. Pultrusion was done in the same fashion as wire coating, except that the wire coating die was replaced by an in-house built pultrusion die.
  • the polymeric fibres were Diolen® 183 (supplier: Acordis Industrial fibres), having a diameter of 25 ⁇ m and a tenacity of 632 mN/tex. Unless noted otherwise, the oil Pennzultra® 1199 (supplier: Pennzoil) was used as lubricant.
  • the notched Izod impact at -40°C and the falling dart impact at -40°C were determined for polymer compounds comprising PP, brand Stamylan® P (supplier: DSM) having various MFI values, 20 wt.% PET-fibres of 12.5 mm length, brand Diolen® 183 (supplier: Acordis Industrial fibres), melting at 250°C - 265°C, and - except for the comparative experiment - 0.5 wt.% lubricant.
  • the compounds were prepared via wire coating at 200°C. Table 1
  • the notched Izod impact resistance remains at the known level when the thermoplastic matrix does not have a high flow (in other words: a low MFI, comparative experiment A). If a high flow is selected, the notched Izod impact resistance increases. This is surprising, since common polymer knowledge predicts a decreasing impact resistance with increasing flow of a matrix material.
  • the falling dart impact resistance also increases when the matrix has a high flow. Additionally, the falling dart samples of Examples 3 and 4 were classified as splinter-free.
  • the notched Izod impact at +25°C and at -40°C was determined for polymer compounds comprising PP, brand Stamylan® P 213MNK40, various wt.% PET-fibres of 12.5 mm length, and - except for the comparative experiment - 0.5 wt.% lubricant.
  • the compounds were prepared via wire coating at 200°C.
  • the notched Izod impact at 25°C was determined for polymer compounds comprising PP, brand Stamylan® P 213MNK40, varying wt.% PET-fibres of 12.5 mm length as indicated in Table 3, and - except for the comparative experiment - 0.5 wt.% lubricant.
  • the compounds were prepared via wire coating at 200°C.
  • the notched Izod impact at -40°C was determined for polymer compounds comprising PP, brand Stamylan® P 213MNK40, 20 wt.% PET-fibres of varying length as indicated in Table 4, and 0.5 wt.% lubricant.
  • the compounds were prepared via wire coating at 200°C.
  • the notched Izod impact at -40°C and the flexural modulus at room temperature was determined for polymer compounds comprising PP, brand Stamylan® P 213MNK40, 20 wt.% PET-fibres of 6 mm length, a coarse talc, wt.% and type as indicated in Table 5 (supplier: Luzenac), and 0.5 wt.% lubricant.
  • Example IV representing a polymeric compound according to the invention without the addition of talc, Example IV is included in Table 5 as well.
  • the compounds were prepared via wire coating at 200°C.
  • the notched Izod impact at -40°C and the tensile modulus at room temperature were determined for a polymeric compound comprising PP, brand Stamylan® P 213MNK40, 20 wt.% PET-fibres of 6 mm length, 2.5 wt.% lubricant and 20 wt.% of wollastonite, a naturally occurring calcium metasilicate, brand Nyad® G (supplier: Nyco), as filler.
  • the polymeric compound was prepared via wire coating at 200°C.
  • Example XXI The notched Izod impact at -40°C was determined, and the surface characteristic determined, for polymer compounds comprising PP, brand Stamylan® P 213MNK40, 20 wt.% PET-fibres of 12.5 mm length, and varying percentage of a paraffinic oil, type Sunpar® 150 (supplier: Sunoco / Sun Oil Company Belgium) in Example XIX and XX and type Pennzultra® 1199 (supplier: Pennzoil) in Example XXI, as indicated in Table 7.
  • the mixing of oil and PP in Example XIX was done via a simple tumble-mixing step which resulted in PP granulate, wetted on the outside with oil.
  • a fine talc was also added as a filler (type Steamic® 00S D, supplier Luzenac). The compounds were prepared as indicated in Table 7.
  • a lubricant according to the invention creates a best-of-both-worlds situation: impact resistance at a high level, while at the same time the surface characteristics are improved, especially when the lubricant is essentially present on the interface between thermoplastic matrix and polymeric fibre (Examples XX and XXI).
  • the combination of oil addition with talc addition produced a surprising further effect: the impact resistance actually increased, while the beneficial effects of oil addition such as the essentially bundle-free surface characterisation were maintained.
  • the notched Izod impact at -40°C and the falling dart impact at -40°C were determined for a polymeric compound comprising as thermoplastic matrix a polyolefinic ethylene based octene co-polymer plastomer, brand Exact ⁇ 8210 (supplier: Dex Plastomers) having a MFI of 10 g/10 min (measured at 190°C/2.16 kg), 20 wt.% PET-fibres of 6 mm length, and 2.5 wt.% of lubricant.
  • the polymeric compound was prepared via wire coating. For comparison, same properties were determined on the matrix material. Table 8
  • Example XXII the notched Izod impact resistance and the falling dart impact of Example XXII are superior to those of the polymeric matrix material as such.
  • the notched Izod impact at 25°C and at -40°C, and the falling dart impact at -40°C were determined for a polymeric compound comprising as thermoplastic matrix a high-density polyethylene (HDPE), brand Stamylan® HD 9089 (supplier: DSM) having a density of 963 kg/m 3 and an MFI of 8 g/10 min (measured at 21.2N/190°C), 20 wt.% PET-fibres of 6 mm length, and 2.5 wt.% of lubricant.
  • the polymeric compound was prepared via wire coating.
  • the notched Izod impact properties were determined on the thermoplastic matrix material as such.
  • Example XXIII the notched Izod impact resistance at both room temperature and at -40°C of Example XXIII are superior to those of the HDPE thermoplastic matrix material as such.
  • the notched Izod impact at -40°C and the falling dart impact at -40°C were determined for polymeric compounds comprising PP, brand Stamylan® P 213MNK40, 20 wt.% PET-fibres of 6 mm length and diameters 12 ⁇ , 25 ⁇ and 45 ⁇ , and 2.5 wt.% of lubricant.
  • the polymeric compounds were prepared via wire coating at 200°C.
  • the notched Izod impact at -40°C and the falling dart impact at -40°C were determined for polymeric compounds comprising PP, brand Stamylan® P 213MNK40, 20 wt.% PET-fibres of 6 mm length and fibre strengths 579, 632 and 691 mN/tex, and 2.5 wt.% of lubricant.
  • the polymeric compounds were prepared via wire coating at 200°C. Table 11
  • the notched Izod impact at 25°C and at -40°C were determined for a polymeric compound comprising PP, brand Stamylan® P 213MNK40, 20 wt.% polyethylenenaphtalate (PEN) fibres type T112 (supplier: KoSa), and 2.5 wt.% of lubricant.
  • the polymeric compounds were prepared via wire coating at 200°C.

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Abstract

Cette invention concerne un composé polymérique comprenant une matrice thermoplastique et des fibres polymériques. La matrice thermoplastique présente un débit élevé pendant le traitement par fusion. Le composé polymérique comprend entre 0,5 et 10 % en poids d'un lubrifiant. La longueur des fibres polymériques est comprise entre 0,1 et 50 mm. L'invention concerne en outre une méthode de préparation de composés polymériques et l'utilisation desdits composés.
PCT/EP2001/015391 2000-12-28 2001-12-21 Compose polymerique et methode de preparation du compose WO2002053629A1 (fr)

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Cited By (6)

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FR2871164A1 (fr) * 2004-06-02 2005-12-09 Gaillon Soc Par Actions Simpli Composition thermoplastique destinee a la fabrication d'elements plats alveolaires par extrusion puis calandrage et elements ainsi obtenus
WO2006125034A2 (fr) * 2005-05-17 2006-11-23 Exxonmobil Research And Engineering Company Compositions de polypropylene renforcees par des fibres
WO2009045807A1 (fr) * 2007-10-04 2009-04-09 Invista Technologies S.A. R.L. Faisceaux de fibres de renforcement pour fabriquer des composites polymériques renforcés par fibre
US7863364B2 (en) 2006-01-17 2011-01-04 Exxonmobil Chemical Patents Inc. Process for making dynamically-loaded articles comprising propylene-based elastomers, composition for use in such processes, and article made using such processes
NL2014222A (en) * 2014-02-21 2015-08-25 Royalty Bugaboo Gmbh A plastic component of a composite material, a shell for a suitcase, a suitcase.
CN113372678A (zh) * 2021-06-23 2021-09-10 中国科学院兰州化学物理研究所 一种含油纤维-聚合物自润滑复合材料及其制备方法

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FR2871164A1 (fr) * 2004-06-02 2005-12-09 Gaillon Soc Par Actions Simpli Composition thermoplastique destinee a la fabrication d'elements plats alveolaires par extrusion puis calandrage et elements ainsi obtenus
WO2006125034A2 (fr) * 2005-05-17 2006-11-23 Exxonmobil Research And Engineering Company Compositions de polypropylene renforcees par des fibres
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US7482402B2 (en) 2005-05-17 2009-01-27 Exxonmobil Research And Engineering Company Fiber reinforced polypropylene compositions
US7863364B2 (en) 2006-01-17 2011-01-04 Exxonmobil Chemical Patents Inc. Process for making dynamically-loaded articles comprising propylene-based elastomers, composition for use in such processes, and article made using such processes
WO2009045807A1 (fr) * 2007-10-04 2009-04-09 Invista Technologies S.A. R.L. Faisceaux de fibres de renforcement pour fabriquer des composites polymériques renforcés par fibre
JP2010540753A (ja) * 2007-10-04 2010-12-24 インビスタ テクノロジーズ エス エイ アール エル 繊維強化ポリマー複合物製造用の強化繊維束
NL2014222A (en) * 2014-02-21 2015-08-25 Royalty Bugaboo Gmbh A plastic component of a composite material, a shell for a suitcase, a suitcase.
CN113372678A (zh) * 2021-06-23 2021-09-10 中国科学院兰州化学物理研究所 一种含油纤维-聚合物自润滑复合材料及其制备方法

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