CH673010A5 - Glass fibre reinforced polypropylene moulded - with PVC impregnated cover to provide non skid surface - Google Patents
Glass fibre reinforced polypropylene moulded - with PVC impregnated cover to provide non skid surface Download PDFInfo
- Publication number
- CH673010A5 CH673010A5 CH269487A CH269487A CH673010A5 CH 673010 A5 CH673010 A5 CH 673010A5 CH 269487 A CH269487 A CH 269487A CH 269487 A CH269487 A CH 269487A CH 673010 A5 CH673010 A5 CH 673010A5
- Authority
- CH
- Switzerland
- Prior art keywords
- mold
- slip
- temperature
- pref
- heated
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/08—Impregnating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/06—Fibrous reinforcements only
- B29C70/08—Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, and with or without non-reinforced layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
- B29C70/82—Forcing wires, nets or the like partially or completely into the surface of an article, e.g. by cutting and pressing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Laminated Bodies (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
A service tray with a non-skid surface comprises a moulding of polypropylene reinforced with glass fibre matting having a surface layer of cotton cloth impregnated with a relatively high friction material, pref. PVC and laid in the mould to provide the concave surface of the tray. The surface of the mould is pref. maintained at 30 to 60 deg.C. The moulding material (PP + glass mat) is pref. heated to between 190 deg.C and 225 deg.C. The cotton fabric may be perforated. The moulding pref. has a matt surface, pref. decorated by e.g. a pattern displayed by the cotton cloth.
Description
DESCRIPTION
L'invention concerne un procédé de fabrication d'un plateau de service antidérapant, dans lequel on utilise une presse avec un moule formé de deux parties complémentaires, une partie avec une surface convexe et une partie avec une surface concave.
On connaît différents procédés de fabrication d'un plateau de service antidérapant, par exemple par le CH-A-605 100 et le CH-A628 509, où l'on prend soit des feuilles de papier enduites ou impréguées de résine thermodurcissable, on superpose à cet empilage une toile souple recouverte au moins sur sa face supérieure d'une couche de matière thermoplastique et on presse à chaud l'ensemble ainsi obtenu de façon à donner à la matière stratifiée sa forme définitive, ou encore l'on utilise un moule formé de deux parties complémentai- res avec une surface convexe et une surface concave et l'on introduit entre les parties du moule du côté surface convexe la même toile souple et sur le côté de la surface concave un matériau thermoplastique ou thermodurcissable, pour former le plateau désiré.
Bien que ces plateaux antidérapants, obtenus par ces procédés, présentent d'excellentes qualités, il serait désirable, et c'est le but de l'invention, d'améliorer le procédé de fabrication tout en obtenant une qualité équivalente aux plateaux connus. Ce but est atteint par un procédé défini dans les revendications 1 et 6.
L'invention va être décrite ci-après par un exemple de mise en oeuvre du procédé de fabrication.
Le matériau de base pour fabriquer le plateau de service est du polypropylène renforcé avec des nattes de fibres de verre, formant un produit laminé. De tels produits semi-finis sont utilisés comme matériau de base pour former par exemple des parties d'automobile, telles que supports de siège, pare-chocs, et d'autres pièces.
Le polypropylène stratifié en forme de plaques est introduit dans un four et chauffé à 190-225 C. Entre-temps, on recouvre la partie convexe du moule, qui forme en même temps le poinçon de la presse, d'une toile de coton dont au moins la face en contact avec la surface convexe est imprégnée d'une couche de matière thermoplastique, telle que du PVC. Puis l'on transfère la plaque de polypropylène stratifié, qui a gonflé avec la chaleur sur la toile, et l'on ferme la presse. La presse, c'est-à-dire les deux parties du moule doivent être sensiblement moins chaudes que la plaque chauffée, de préférence entre 30 et 60 C, ce qui permet une cadence de production élevée. Il peut être utile de refroidir le moule à l'eau.
La toile utilisée peut être en matière textile artificielle, animale ou végétale, de préférence en coton. Dans certains cas, il est possible que des bulles de gaz ou de vapeur restent prisonnières après le moulage de la surface du plateau et créent ainsi des inégalités inesthétiques. Dans ce cas, il est possible d'utiliser une toile perforée pour faciliter l'évacuation des gaz et des vapeurs. L'échauffement de cette toile par la plaque de polypropylène chaude confère à la couche en PVC les caractéristiques antidérapantes désirées.
Comme renforcement du polypropylène, on utilise surtout des nappes faites de fibres de verre longues, ce qui confère au produit un renforcement égal dans toutes les directions. Il est aussi possible de prendre un autre produit de base, tel que le nylon ou le polyester, renforcé de même manière par des nattes de fibres de verre.
Les plateaux ainsi obtenus présentent, outre les propriétés antidérapantes, une très bonne rigidité et une bonne résistance, mécanique et aux produits chimiques. Ce procédé se prête en outre facilement à la fabrication de plateaux antidérapants décorés. Dans ce but, les toiles utilisées peuvent être imprimées de motifs divers, tels que fleurs, paysages, animaux, imitation bois, photographies ou cartes routières.
Du fait de la proportion assez grande, jusqu'à 40%, de fibres de verre, il est difficile d'obtenir une surface lisse. Il est donc préférable que la surface des moules ait une structure, c'est-à-dire qu'elle ne soit pas lisse, par exemple une structure toilée, celle-ci étant alors conférée aux deux côtés du plateau. Il est clair que le matériau peut avoir différentes couleurs, ainsi que la toile.
DESCRIPTION
The invention relates to a method of manufacturing a non-slip serving tray, in which a press is used with a mold formed from two complementary parts, one part with a convex surface and one part with a concave surface.
We know different methods of manufacturing a non-slip service tray, for example by CH-A-605 100 and CH-A628 509, where we take either sheets of paper coated or impregnated with thermosetting resin, we superimpose to this stacking a flexible canvas covered at least on its upper face with a layer of thermoplastic material and the assembly thus obtained is hot pressed so as to give the laminated material its final shape, or else a mold is used formed of two complementary parts with a convex surface and a concave surface and the same flexible fabric is introduced between the parts of the mold on the convex surface side and on the side of the concave surface a thermoplastic or thermosetting material, to form the desired tray.
Although these non-slip trays obtained by these methods have excellent qualities, it would be desirable, and this is the aim of the invention, to improve the manufacturing process while obtaining a quality equivalent to known trays. This object is achieved by a process defined in claims 1 and 6.
The invention will be described below by an example of implementation of the manufacturing process.
The basic material for making the serving tray is polypropylene reinforced with glass fiber mats, forming a laminated product. Such semi-finished products are used as the base material to form, for example, automobile parts, such as seat supports, bumpers, and other parts.
Polypropylene laminated in the form of plates is introduced into an oven and heated to 190-225 C. In the meantime, the convex part of the mold, which at the same time forms the punch of the press, is covered with a cotton canvas, at least the face in contact with the convex surface is impregnated with a layer of thermoplastic material, such as PVC. Then transfer the laminated polypropylene plate, which has swollen with heat to the canvas, and close the press. The press, that is to say the two parts of the mold, must be substantially less hot than the heated plate, preferably between 30 and 60 ° C., which allows a high production rate. It may be useful to cool the mold with water.
The canvas used can be made of artificial, animal or vegetable textile material, preferably cotton. In some cases, it is possible that gas or vapor bubbles remain trapped after molding the surface of the tray and thus create unsightly inequalities. In this case, it is possible to use a perforated fabric to facilitate the evacuation of gases and vapors. The heating of this fabric by the hot polypropylene plate gives the PVC layer the desired non-slip characteristics.
As reinforcement for polypropylene, we mainly use sheets made of long glass fibers, which gives the product equal reinforcement in all directions. It is also possible to take another basic product, such as nylon or polyester, reinforced in the same way by glass fiber mats.
The plates thus obtained have, in addition to the non-slip properties, very good rigidity and good mechanical and chemical resistance. This process also lends itself easily to the manufacture of decorated non-slip trays. For this purpose, the fabrics used can be printed with various patterns, such as flowers, landscapes, animals, imitation wood, photographs or road maps.
Due to the fairly large proportion, up to 40%, of glass fibers, it is difficult to obtain a smooth surface. It is therefore preferable that the surface of the molds have a structure, that is to say that it is not smooth, for example a canvas structure, the latter then being imparted to the two sides of the tray. It is clear that the material can have different colors, as well as the canvas.
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH269487A CH673010A5 (en) | 1987-07-15 | 1987-07-15 | Glass fibre reinforced polypropylene moulded - with PVC impregnated cover to provide non skid surface |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH269487A CH673010A5 (en) | 1987-07-15 | 1987-07-15 | Glass fibre reinforced polypropylene moulded - with PVC impregnated cover to provide non skid surface |
Publications (1)
Publication Number | Publication Date |
---|---|
CH673010A5 true CH673010A5 (en) | 1990-01-31 |
Family
ID=4239479
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH269487A CH673010A5 (en) | 1987-07-15 | 1987-07-15 | Glass fibre reinforced polypropylene moulded - with PVC impregnated cover to provide non skid surface |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH673010A5 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000015085A1 (en) * | 1998-09-11 | 2000-03-23 | Jayfield Pty. Ltd. | Table or counter mat |
-
1987
- 1987-07-15 CH CH269487A patent/CH673010A5/en not_active IP Right Cessation
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000015085A1 (en) * | 1998-09-11 | 2000-03-23 | Jayfield Pty. Ltd. | Table or counter mat |
GB2348395A (en) * | 1998-09-11 | 2000-10-04 | Jayfield Pty Ltd | Table or counter mat |
GB2348395B (en) * | 1998-09-11 | 2002-03-06 | Jayfield Pty Ltd | Table or counter mat |
US7067184B1 (en) | 1998-09-11 | 2006-06-27 | Stephen Robert Carkeek | Table or counter mat |
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PL | Patent ceased |