EP0578455B1 - Plaque pleine à base de polyoléfine - Google Patents
Plaque pleine à base de polyoléfine Download PDFInfo
- Publication number
- EP0578455B1 EP0578455B1 EP93305225A EP93305225A EP0578455B1 EP 0578455 B1 EP0578455 B1 EP 0578455B1 EP 93305225 A EP93305225 A EP 93305225A EP 93305225 A EP93305225 A EP 93305225A EP 0578455 B1 EP0578455 B1 EP 0578455B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- talc
- plate
- polyolefin
- plates
- sheet according
- 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.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D71/00—Bundles of articles held together by packaging elements for convenience of storage or transport, e.g. portable segregating carrier for plural receptacles such as beer cans or pop bottles; Bales of material
- B65D71/70—Trays provided with projections or recesses in order to assemble multiple articles, e.g. intermediate elements for stacking
Definitions
- the present invention generally relates to plates polyolefin-based solids.
- These plates are used in particular as spacers for palletizing or for packaging intended for transport or storage of containers. They are used for example to separate several layers of glass or metal containers or bottles.
- This non-slip plate is based on polyolefin and is formed of a core layer and on at least one of the faces thereof, an outer layer non-slip. Such a plate is described in the application for French patent filed under number 91 13978. (EP-A 548553).
- the subject of the invention is solid plates which overcome all of the disadvantages mentioned above. More specifically, the invention consists of a full polyolefin bottom plate for dividers or packaging, characterized in that it is formed of a core layer comprising at least at least one polyolefin and talc and on at least one of the faces of said layer core, a non-slip outer layer coextruded with the core layer cited above.
- the aforementioned polyolefin is a polypropylene, homopolymer or copolymer, or mixtures thereof.
- the talc content of the plate is at least equal to 5% by weight.
- the plate according to the invention is a solid plate and calendered.
- This plate is formed of a layer comprising a polyolefin charged with talc.
- Talc has been chosen from different mineral substances such as chalk, mica, fiberglass or others, such as providing very advantageous results in mechanical properties.
- the talc content of the plate must be at least 5% in weight. There is no upper weight limit but this content often remains below 25% for a simple reason cost of raw material.
- the preferred talc content meeting both the characteristics mechanical requirements and cost requirements varies between about 5 and about 20% by weight. More preferably, the talc content varies between about 9 and about 15% talc. In addition, a plate too loaded with talc will become brittle and difficult to transform, especially with regard to cutting plates.
- the plate must have a minimum thickness of approximately 3 millimeters for maintain good impact resistance and avoid breakage.
- the polyolefin can be polypropylene in the form of a homopolymer or ethylene-based copolymer, or mixtures thereof.
- Polypropylene homopolymer is preferably used, such as for example HOMOPOLYMERE HY 6100 marketed by SHELL Chimie, the properties of which are presented in Table I below.
- PROPERTY TEST METHOD UNIT VALUE Fluidity index ISO 1133 dg / min 1.5 Volumic mass ISO 1183 g / cm 3 0.903
- Tensile strength ISO 527 MPa 35 Flexural modulus ISO 178 MPa 1350 IZ0D impact resistance (notched) at 20 ° C ISO 180 kJ / m 2 5.2 Heat deformation temperature at 1.80 MN / m 2 (A) ISO 75 ° C 60 at 0.45 MN / m 2 (B) ° C 108 Vicat softening temperature ISO 306 ° C 153 Hardness ISO 868 Shore D 73
- this product has a modulus of rigidity in bending and an impact resistance insufficient for use in the plates for dividers or packaging.
- the heat deformation temperature under two different constraints: one of 1.80 MN / m 2 (A) and the other of 0.45 MN / m 2 (B), is low.
- the mixture of polypropylene homopolymer and talc allows provide rigidity, Vicat softening point and a heat distortion temperature under load significantly improved compared to other types of polypropylene, homopolymer or copolymer, conventionally used, as is moreover illustrated in the examples which follow.
- Polypropylene can also be used in the form of a copolymer, preferably a block copolymer such as, for example, Moplen EPYS 30RE sold by Himont, and the characteristics of which are developed in Table II below.
- the elastic modulus at the bending and impact resistance are insufficient.
- the Vicat softening point and strain temperature at heat are very low.
- the plate comprises on the one hand, a layer as described above, that is to say based on polyolefin and talc, which corresponds to the core layer forming the soul of the plate and on the other hand, on at least one of the faces thereof, a layer external non-slip.
- the non-slip outer layer is arranged on at least one faces of the core layer, and is, in turn, made up of a product which confers the non-slip property to the plate.
- a product which confers the non-slip property to the plate.
- This is for example a polyolefin-based thermoplastic very soft and having a very low modulus of elasticity.
- Concentration in anti-slip thermoplastic in the layer external is at least equal to about 5% by weight and is from preferably between about 20 and about 100% by weight.
- the thickness of the non-slip outer layer may vary between approximately 5 and approximately 150 ⁇ m and preferably between approximately 30 and about 70 ⁇ m.
- thermoplastic rubber such as Santoprene 201-55 sold by Advanced from Elastomer Systems or HIFAX FX 7036 XCP sold by Himont, the properties of which are given in Table III below.
- the process for manufacturing solid plates is known per se and consists, for example, for solid non-slip plates. in a process of coextrusion of a flow in two layers in which the outer layer is deposited on the core layer by means of a coextrusion block or using a multilayer die. The plate formed from the above layers is then calendered.
- the manufactured plate is without housing.
- the mechanical properties of the plates produced in the tests illustrating the invention are measured by two tests: the first which is a 3-point bending test, relating to rigidity and the second which is a test for measuring the creep on the plates full.
- the 3-point bending stiffness test consists of measuring the slope of the deformation curve of a rectangular plate based on two supports.
- the plate is deformed by means of an applied purlin equidistant from the supports and moving at constant speed.
- the diameter of the supports is 10 millimeters.
- the two supports are 10 centimeters apart and the tip is 5 centimeters apart centimeters of the projection of each of the supports on the face top of the plate.
- the measurement protocol is as follows:
- the results are calculated as the average value of the 5 measurements SM and ST of the samples tested.
- This test consists in measuring the deformation of the plate under the effect of a force corresponding to the weight exerted by a load about 50 kg simulating pallet storage.
- An INSTRON 4301 dynamometer is used for the measurements which is installed an oven whose temperature is set at 70 ° C. 15 x 15 cm plate samples are prepared centimeters and condition these samples at 75 ° C, 2 to 3 hours before the test.
- the device cyclically treats between 49.9 and 50.1 kg and the speed of travel of the sleeper on which the above-mentioned part is placed is 1 mm / min.
- Creep values at 70 ° C in millimeters are thus obtained for 1.3 and 15 minutes.
- a witness plate is prepared comprising a layer based on polypropylene homopolymer only, more precisely HY 6100 homopolymer base described above. This article does therefore does not include talc.
- two plates are prepared, each formed of a layer which includes polypropylene homopolymer and talc.
- this mixture is Stamylan P 13T1040 manufactured by DSM. It contains 60% homopolymer polypropylene and 40% talc. Its properties are presented in Table IV below.
- the layer is obtained by mixing 25 to 30% of Stamylan P with 70 to 75% by weight of polypropylene homopolymer HY 6100.
- the stiffness is measured at 20 ° C. then at 60 ° C. and the creep at 70 ° C according to the tests described above.
- the desired rigidity is at least 1 kgf / min at 20 ° C and at least minus 0.5 kgf / min at 60 ° C and the creep strain at 70 ° C must not not exceed 3 millimeters after 1 minute, 3.2 millimeters after after 3 minutes and 3.4 millimeters after 15 minutes.
- Creep deformation at 70 ° C decreased by at least 40% for plates containing talc.
- Seven plates are prepared formed from a layer prepared from homopolymer polypropylene and talc. For convenience. we will also use here as a raw material, a mixture of 60% polypropylene homopolymer and 40% talc: the Vestolen P manufactured by HÜLS.
- Talc therefore provides the mixture with improved properties.
- the layer is obtained by mixing Vestolen P with polypropylene homopolymer in proportions of 25-30% and 70-75% by weight.
- the stiffness is measured at 20 ° C then at 60 ° C and the creep at 70 ° C following the same tests as in Example 1.
- the rigidity at 20 ° C and 60 ° C of the plates according to the invention is at least twice as large as that of the witness plate and the deformation heat at 70 ° C of the plates according to the invention decreased about 40% and up to about 60% compared to the plate witness.
- the thickness of the plate increases to compensate for the brittle nature that can be encountered with higher talc contents.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
PROPRIETE | METHODE DE TEST | UNITE | VALEUR |
Indice de fluidité | ISO 1133 | dg/min | 1,5 |
Masse volumique | ISO 1183 | g/cm3 | 0,903 |
Résistance à la limite élastique en traction | ISO 527 | MPa | 35 |
Module de rigidité en flexion | ISO 178 | MPa | 1350 |
Résistance aux chocs IZ0D (entaillé) à 20°C | ISO 180 | kJ/m2 | 5,2 |
Température de déformation à la chaleur | |||
à 1,80 MN/m2 (A) | ISO 75 | °C | 60 |
à 0,45 MN/m2 (B) | °C | 108 | |
Température de ramolissement Vicat | ISO 306 | °C | 153 |
Dureté | ISO 868 | Shore D | 73 |
PROPRIETE | METHODE DE TEST | UNITE | VALEUR |
Indice de fluidité | ASTM 1238/L | dg/min | 1,5 |
Poids spécifique | ASTM D1505 | g/cm3 | 0,9 |
Module élastique à la flexion | ASTM D790 | MPa | 1200 |
Résistance aux chocs IZOD (entaillé) à 23°C | ASTM D256 | J/m | 350 |
Point de ramollissement Vicat | ASTM D1525 | °C | 50 |
Température de déformation à la chaleur (à 0,46 MN/m2) | ASTM D648 | °C | 85 |
PROPRIETE | METHODE DE TEST | UNITE | VALEUR |
Indice de fluidité "L" | ASTM D1238 | g/10' | 0,8 |
Poids spécifique | ASTM D 792 | g/cm3 | 0,89 |
Module d'élasticité en flexion | ASTM D 790 | MPa | 100 |
Contrainte au seuil d'écoulement | ASTM D 638 | MPa | 5 |
à la rupture | MPa | >8 | |
Allongement au seuil d'écoulement | % | 60 | |
à la rupture | % | >350 | |
Point de ramollissement Vicat (10N) | ASTM D1525 | °C | 55 |
Dureté Shore D | ASTM D2240 | -- | 30 |
PROPRIETE | METHODE DE TEST | UNITE | VALEUR |
Indice de fluidité | ISO R1133 | dg/min | 1,7 |
Module de rigidité en flexion | ISO R 178 | MPa | 3640 |
Résistance aux chocs IZOD (entaillé) + 23°C | ISO R 180 | kJ/m2 | 2,7 |
Température de déformation à la chaleur | ISO R 75 | ||
à 1,80 MN/m2 (A) | °C | 74 | |
à 0,45 MN/m2 (B) | °C | 129 | |
Température de ramollissement Vicat | ISO R 306 | °C | 93 |
Dureté | ISO R 868 | Shore D | 74 |
Plaque | Epaisseur (mm) | % poids Talc | Rigidité à 20°C (kgf/ min) | Rigidité à 60°C (kgf/min) | Fluage à 70°C (mm) | ||||
SM | ST | SM | ST | 1' | 3' | 15' | |||
Témoin | 2,9 | 0 | 0,5 | 0,5 | 4,6 | 4,8 | 5,1 | ||
(Polypropylène homopolymère + talc) Plaque n° 1 | 3,1 | 18 | 1,3 | 1,1 | 0,7 | 0,6 | 2,7 | 2,8 | 3,0 |
(Polypropylène homopolymère + talc) Plaque n° 2 | 3,15 | 18 | 1,3 | 1,2 | 0,7 | 0,7 | 2,7 | 2,7 | 2,9 |
PROPRIETE | METHODE DE TEST | UNITE | VALEUR |
Indice de fluidité | ISO 1133 | dg/min | 2,8 |
Module de rigidité en flexion | ISO 527 | MPa | 4500 |
Résistance aux chocs à température | ISO 180 | kJ/m2 | |
ambiante IZ0D (entaillé) | 3,2 | ||
Température de déformation à la chaleur | |||
à 1,80 MN/m2 (A) | °C | 100 | |
à 0,45 MN/m2 (B) | °C | 140 | |
Température de ramollissement Vicat | ISO 306 | °C | 110 |
Plaque | Epaisseur (mm) | % poids Talc | Rigidité (kgf/ | à 20°C min) | Rigidité à 60°C (kgf/min) | Fluage à 70°C (mm) | |||
SM | ST | SM | ST | 1' | 3' | 15' | |||
Témoin | 2,9 | 0 | 0,5 | 0,5 | 4,6 | 4,8 | 5,1 | ||
(Polypropylène homopolymère + talc) Plaque n° 3 | 3,7 | 9 | 1,8 | 1,7 | 1 | 1 | 2,0 | 2,1 | 2,2 |
(Polypropylène homopolymère + talc) Plaque n° 4 | 3,1 | 10 | 1 | 1 | 0,6 | 0,7 | 2,8 | 2,9 | 3,1 |
(Polypropylène homopolymère + talc) Plaque no 5 | 3 | 11 | 1,1 | 1 | 0,6 | 0,5 | 2,8 | 2,9 | 3,1 |
(Polypropylène homopolymère + talc) Plaque no 6 | 3 | 14 | 1,1 | 1 | 0,6 | 0,6 | 2,7 | 2,9 | 3,1 |
(Polypropylène bomopolymère + talc) Plaque no 7 | 3,25 | 17 | 1,4 | 1,3 | 0,8 | 0,8 | 2,4 | 3,0 | 2,7 |
(Polypropylène homopolymère + talc) Plaque no 8 | 3,35 | 17 | 1,6 | 1,3 | 0,8 | 0,8 | 2,4 | 2,5 | 2,6 |
(Polypropylène homopolymère + talc) Plaque no 9 | 3,75 | 21 | 2,3 | 2,1 | 1,3 | 1,3 | 1,9 | 2,0 | 2,1 |
Claims (8)
- Plaque pleine a base de polyoléfine pour intercalaires ou emballages, caractérisée en ce qu'elle est formée d'une couche de coeur comprenant au moins une polyoléfine et du talc et sur au moins une des faces de ladite couche de coeur, d'une couche externe antiglissante coextrudée avec la couche de coeur précitée.
- Plaque selon la revendication 1, caractérisée en ce que la polyoléfine précitée est un polypropylène, homopolymère ou copolymère, ou leurs mélanges.
- Plaque selon la revendication 2, caractérisée en ce que la polyoléfine est de préférence le polypropylène homopolymère.
- Plaque selon l'une des revendications 1 à 3, caractérisée en ce que la teneur en talc est au moins égale à 5 % en poids.
- Plaque selon l'une des revendications 1 à 4, caractérisée en ce que la teneur en talc est comprise de préférence entre environ 5 et environ 20 % en poids.
- Plaque selon l'une des revendications 1 à 5, caractérisée en ce que la couche externe antiglissante précitée comprend un produit thermoplastique compatible avec les polyoléfines et possédant des propriétés antiglissantes.
- Plaque selon la revendication 6, caractérisée en ce que le produit précité est un thermoplastique à base de polyoléfine.
- Plaque selon l'une des revendications précédentes, caractérisée en ce que la couche externe précitée a une épaisseur variant entre environ 5 et environ 150 µm et de préférence entre environ 30 et environ 70 µm.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9208638 | 1992-07-10 | ||
FR9208638A FR2693434B1 (fr) | 1992-07-10 | 1992-07-10 | Plaque pleine à base de polyoléfine. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0578455A1 EP0578455A1 (fr) | 1994-01-12 |
EP0578455B1 true EP0578455B1 (fr) | 1998-10-07 |
Family
ID=9431824
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93305225A Expired - Lifetime EP0578455B1 (fr) | 1992-07-10 | 1993-07-02 | Plaque pleine à base de polyoléfine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0578455B1 (fr) |
DE (1) | DE69321407T2 (fr) |
FR (1) | FR2693434B1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2867482B1 (fr) * | 2004-03-12 | 2007-10-26 | Kaysersberg Packaging Sa | Materiau comprenant une polyolefine pour la fabrication de plaques suceptibles d'etre imprimees , plaques fabriquees avec ce materiau |
DE102011080674A1 (de) * | 2011-08-09 | 2013-02-14 | Orbita-Film Gmbh | Bitumenölbarriere |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1069814A (fr) * | 1975-10-22 | 1980-01-15 | Ernest J. Buckler | Stratifies renfermant du polystyrene injecte |
JPS6058339A (ja) * | 1983-08-24 | 1985-04-04 | 旭化成株式会社 | シ−トパレツト |
JPS60238339A (ja) * | 1984-05-10 | 1985-11-27 | Nippon Petrochem Co Ltd | 耐熱性ティアシート |
JPH01301235A (ja) * | 1988-05-30 | 1989-12-05 | Sekisui Plastics Co Ltd | 真空成形に適した積層発泡シート |
-
1992
- 1992-07-10 FR FR9208638A patent/FR2693434B1/fr not_active Expired - Lifetime
-
1993
- 1993-07-02 DE DE1993621407 patent/DE69321407T2/de not_active Expired - Lifetime
- 1993-07-02 EP EP93305225A patent/EP0578455B1/fr not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
DATABASE WPIL Week 8520, Derwent Publications Ltd., London, GB; AN 85-11873 & JP-A-60 058 339 (ASAHI CHEMICAL IND KK) 4 Avril 1985 * |
Also Published As
Publication number | Publication date |
---|---|
DE69321407T2 (de) | 1999-04-22 |
DE69321407D1 (de) | 1998-11-12 |
FR2693434B1 (fr) | 1994-08-19 |
FR2693434A1 (fr) | 1994-01-14 |
EP0578455A1 (fr) | 1994-01-12 |
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