DE1947434B2 - Process for covering large areas with pre-impregnated glass fiber mats and suitable glass fiber mats - Google Patents
Process for covering large areas with pre-impregnated glass fiber mats and suitable glass fiber matsInfo
- Publication number
- DE1947434B2 DE1947434B2 DE19691947434 DE1947434A DE1947434B2 DE 1947434 B2 DE1947434 B2 DE 1947434B2 DE 19691947434 DE19691947434 DE 19691947434 DE 1947434 A DE1947434 A DE 1947434A DE 1947434 B2 DE1947434 B2 DE 1947434B2
- Authority
- DE
- Germany
- Prior art keywords
- glass fiber
- mat
- channels
- fiber mats
- pressing
- 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.)
- Granted
Links
Classifications
-
- 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
- B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
- B29C70/12—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of short length, e.g. in the form of a mat
-
- 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
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/12—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of short lengths, e.g. chopped filaments, staple fibres or bristles
- B29K2105/128—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of short lengths, e.g. chopped filaments, staple fibres or bristles in the form of a mat
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Reinforced Plastic Materials (AREA)
- Laminated Bodies (AREA)
Description
3535
Die Erfindung betrifft ein Verfahren zum Belegen großer Flächen mit vorimprägnierten Glasfasermatten durch Pressen bei niedrigem Druck.The invention relates to a method for covering large areas with pre-impregnated glass fiber mats by pressing at low pressure.
Die Erfindung betrifft ferner eine vorimprägnierte Glasfasermatte für die Anwendung bei dem Verfahren.The invention also relates to a pre-impregnated fiberglass mat for use in the method.
Eine vorimprägnierte Glasfasermatte besteht gewöhnlich aus einer Glasfasermatte mit verhältnismäßig langen Fasern, etwa 50 mm, die mit einer Mischung aus Duroplast, gewöhnlich Polyester, Füllstoff, Färbpigment, Schleifmittel, Härtungsmittel, Verdickungsmittel und anderen speziellen Chemikalien imprägniert ist. Diese Matte soll nach ihrem »Reifen« eine hohe Viskosität haben, was mittels geeigneter Chemikalien, die Eindickung bewirken, erreicht wird. Der Preßvorgang verlangt nämlich eine hohe Viskosität, damit der Kunststoff während des plastischen Fließens Glasfasern und Füllstoff transportieren kann, ohne die Materialien voneinander zu trennen, und damit die Matte während des Hantierens nicht klebt.A pre-impregnated fiberglass mat usually consists of a fiberglass mat with relatively long fibers, about 50 mm, coated with a mixture of thermoset, usually polyester, filler, coloring pigment, Abrasives, hardeners, thickeners, and other specialty chemicals are impregnated. This mat should have a high viscosity after it has »matured«, which can be achieved by means of suitable chemicals, effect the thickening is achieved. The pressing process requires a high viscosity so that the Plastic can transport glass fibers and filler during plastic flow without affecting the materials separate from each other, so that the mat does not stick during handling.
Bei Anwendung einer solchen Matte zur Bekleidung einer größeren ebenen Fläche, beispielsweise einer Tischplatte oder dergleichen, ist das Risiko groß, daß beim Pressen Luft zwischen Matte und Preßplatte eingeschlossen wird, insbesondere wenn man nicht mit hohem Preßdruck, etwa 50— 150kp/cm2, arbeitet. Bei größeren Flächen ist die Anwendung eines hohen Preßdruckes oft nicht ermöglicht, da die Presse unwirtschaftlich große Abmessungen erhalten würde, und da der zu bekleidende Werkstoff, z. B. Holz, so große Drücke nicht aushält Man ist also gezwungen, mit niedrigen Preßdrücken, etwa der Größenordnung 5—50 kp/cm2, zu arbeiten. Bei niedrigen Preßdrücken ist jedoch die Gefahr von Lufteinschlüssen sehr groß. Durch Lufteinschlüsse bilden sich in der fertigen Oberfläche Blasen, die zu einer Schwächung der Oberfläche und oft zu einem Brechen der Bekleidungsmatte führen. When using such a mat to cover a larger flat surface, for example a table top or the like, there is a high risk that air will be trapped between the mat and the press plate during the pressing process, especially if the pressure is not high, about 50-150 kp / cm 2 , is working. For larger areas, the use of a high pressure is often not possible because the press would get uneconomically large dimensions, and since the material to be covered, such. B. Wood, which cannot withstand high pressures. So one is forced to work with low pressures, of the order of 5-50 kg / cm 2 . At low press pressures, however, the risk of air inclusions is very high. Air inclusions form bubbles in the finished surface, which weaken the surface and often cause the clothing mat to break.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Belegen großer Flächen mit vorimprägnierten Glasfasermatten zu schaffen, das ein Verpressen mit niedrigem Druck ohne Gefahr von Lufteinschlüssen ermöglichtThe invention is based on the object of a method for covering large areas with pre-impregnated To create fiberglass mats that allow pressing with low pressure without the risk of air inclusions enables
Die Aufgabe wird gemäß der Erfindung dadurch gelöst, daß man eine Glasfasermatte mit in ihrer Oberfläche angeordneten, zu mindestens einer Umfangskante verlaufenden Kanälen einsetzt und daß man das Pressen zumindest so lange vornimmt, bis die Kanäle verschwunden sind.The object is achieved according to the invention in that one has a glass fiber mat with in her Surface arranged, to at least one circumferential edge extending channels is used and that one continues pressing at least until the channels have disappeared.
Dadurch, daß die Oberfläche der vorimprägnierten Matte mit Kanälen versehen ist, kann die Luft bei Beginn des Pressens entweichen, so daß die Masse keine Luftblasen einschließt.Because the surface of the pre-impregnated mat is provided with channels, the air can at Beginning of pressing escape so that the mass does not include any air bubbles.
Bei einem Verfahren, bei dem das Pressen mittels Preßplatten geschieht, wird das Pressen vorzugsweise so vorgenommen, daß die Kanäle der Glasfasermatte der Preßplatte zugewandt sind. Dies ist insbesondere bei Bekleidung von Gegenständen aus porösem Material von Vorteil, wo die zwischen Matte und Gegenstand eingeschlossene Luft in den Gegenstand hineingedrückt wird.In a method in which the pressing is done by means of press plates, pressing is preferred made so that the channels of the fiberglass mat face the press plate. This is particularly the case Clothing of objects made of porous material is advantageous, where the between the mat and the object trapped air is forced into the object.
Vorzugsweise setzt man eine Glasfasermatte ein, deren Kanäle von der Mitte der Matte aus zur Umfangskante hin mit konisch zunehmendem Querschnitt ausgebildet sind. Dank dieser Ausbildung wird der Luft eine vorteilhafte Bewegung nach außen vermittelt, wobei Material und Luft von der Matten- und Preßplattenmitte nach außen zu den Kanten gepreßt und gleichzeitig die Kanäle zugedrückt und mit Material gefüllt werden, wodurch sie verschwinden. Die Matte erhält dadurch eine gleichmäßige glatte Oberfläche ohne Lufteinschlüsse. Die sich konisch erweiternde Form der Kanäle macht ein Verbleiben von Luft in der Matte unmöglich.A glass fiber mat is preferably used, the channels of which extend from the center of the mat to Circumferential edge are designed with a conically increasing cross-section. Thanks to this training will the air gives a beneficial movement to the outside, with material and air from the mat and Press plate center pressed outwards to the edges and at the same time the channels pressed shut and with material filled, making them disappear. This gives the mat an even, smooth surface without air pockets. The conically widening shape of the channels means that air remains in the Mat impossible.
Das Verfahren gemäß der Erfindung ermöglicht das Ausführen des Pressens mit verhältnismäßig niedrigem Druck unter Anwendung herkömmlicher Pressen. Die Methode wird hierdurch wirtschaftlich und macht es überhaupt möglich, Material der beschriebenen Art zur Bekleidung größerer Flächen anzuwenden.The method according to the invention enables pressing to be carried out at a relatively low level Printing using conventional presses. This makes the method economical and makes it It is even possible to use material of the type described for covering larger areas.
Claims (5)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE1292168A SE320488B (en) | 1968-09-25 | 1968-09-25 |
Publications (3)
Publication Number | Publication Date |
---|---|
DE1947434A1 DE1947434A1 (en) | 1970-04-02 |
DE1947434B2 true DE1947434B2 (en) | 1978-03-30 |
DE1947434C3 DE1947434C3 (en) | 1978-12-07 |
Family
ID=20296534
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19691947434 Expired DE1947434C3 (en) | 1968-09-25 | 1969-09-19 | Process for covering large areas with pre-impregnated glass fiber mats and suitable glass fiber mats |
Country Status (5)
Country | Link |
---|---|
DE (1) | DE1947434C3 (en) |
DK (1) | DK130714B (en) |
FI (1) | FI48546C (en) |
NO (1) | NO136564C (en) |
SE (1) | SE320488B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2910234C2 (en) * | 1979-03-15 | 1983-05-26 | Alkor GmbH Kunststoffverkauf, 8000 München | Process for the production of a shaped body from a carrier plate with a decorative layer |
WO2009133143A1 (en) | 2008-04-30 | 2009-11-05 | Vestas Wind Systems A/S | A consolidated composite pre-from |
-
1968
- 1968-09-25 SE SE1292168A patent/SE320488B/xx unknown
-
1969
- 1969-09-09 NO NO360469A patent/NO136564C/en unknown
- 1969-09-19 FI FI268369A patent/FI48546C/en active
- 1969-09-19 DE DE19691947434 patent/DE1947434C3/en not_active Expired
- 1969-09-23 DK DK504469A patent/DK130714B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
FI48546C (en) | 1974-11-11 |
NO136564B (en) | 1977-06-20 |
DE1947434A1 (en) | 1970-04-02 |
DK130714B (en) | 1975-04-01 |
SE320488B (en) | 1970-02-09 |
FI48546B (en) | 1974-07-31 |
DK130714C (en) | 1975-09-29 |
DE1947434C3 (en) | 1978-12-07 |
NO136564C (en) | 1977-09-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C3 | Grant after two publication steps (3rd publication) |