Honeycomb composite support part and method for coating it
a honeycomb and composite technology, applied in the direction of ion implantation coating, pulp material addition process, coated paper substrate, etc., can solve the problems of difficult commercial application of the known method, loss of strength, and resistance but not fire resistance of paper honeycomb, and achieve the effect of enhancing the structure of the honeycomb formed by the channel and improving the insulation valu
Inactive Publication Date: 2013-07-25
ISELI FREDY
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- Abstract
- Description
- Claims
- Application Information
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Benefits of technology
The present invention relates to a method for coating a honeycomb composite support part with an impregnating coating. The coating is applied in a vacuum coating chamber, which ensures that all the cellulose upper layers of the support part are provided with a closed coating. The coating prevents softening of the cellulose material even when water-based impregnating agent is used. The technical effect of the invention is to improve the performance and durability of the honeycomb composite support part.
Problems solved by technology
The synthetic resin systems used possibly increase the water resistance but not the fire resistance of the paper honeycomb.
In addition, application of the known method on a commercial scale is difficult since it is only possible to proceed in a batchwise manner.
Also the channels of the honeycomb composite support part cannot be coated with arbitrarily viscous or water-containing impregnating agents (e.g. by water-containing inorganic suspension) by the known method since the paper honeycombs absorb the water, as a result lose strength and the honeycomb structure becomes soft and even collapses.
A disadvantage however is that with the known method not all the channels can be coated axially continuously in their interior since those channels of the corrugated board web which are delimited by the carrier paper and the corrugated paper cannot be reached by spraying from outside nor in their interior.
Method used
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Embodiment Construction
[0041]FIG. 1 shows a plan view of a surface side of a honeycomb composite support part 1 (here for example a corrugated board honeycomb body). The section shown consist of four glued-together layers 2 (layers), where each layer 2 is formed by a flat carrier paper 3 which is glued to a corrugated paper 4 to form first channels 5. The first channels 5 are therefore delimited circumferentially by the corrugated paper 4 and the carrier paper 3. Further, each layer 2 comprises second channels 6 which are delimited in the exemplary embodiment shown by the aforesaid corrugated paper 4 and another carrier paper, i.e. the carrier paper of the adjoining (parallel) layer. In an alternative embodiment not shown, each layer 2 can also comprise two carrier papers which incorporate the corrugated paper in sandwich fashion between them. In this case, the second channels are delimited by the corrugated paper and a carrier paper of the same layer.
[0042]As can be seen from FIG. 1, the layers 2 are cur...
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Abstract
A method for coating a cellulose honeycomb composite support part (1), which has a multiplicity of channels which extend in an axial direction, with an impregnating coating in order to increase the fire and / or water resistance and / or mechanical stability. The impregnating agent is fed into a vacuum coating chamber (8) and a complete and axially continuous coating is produced in the channels on their inner circumferential surfaces by deposition of impregnating agent on the inner circumferential surfaces of the channels, and excess impregnating agent (13) is extracted from the vacuum coating chamber (8). The resulting coating structure and a device for coating the composite support are also disclosed.
Description
BACKGROUND OF THE INVENTION[0001]The invention relates to a method for coating a honeycomb composite support part which has a multiplicity of channels extending in an axial direction, which consists of a cellulose, in particular paper or board (honeycomb body for constructive, preferably structural applications, in particular corrugated board honeycomb part or expanded honeycomb body), with an impregnating coating in order to increase the fire and / or water resistance and / or the mechanical stability.[0002]Honeycomb composite support parts, in particular for use as honeycomb core material in composite workpieces are known, where the honeycombs of the honeycomb composite support part are formed by a plurality of channels extending in an axial direction, which are delimited circumferentially by carrier papers and corrugated papers glued to the carrier papers.[0003]Known from DE 36 31 185 A1 is a method for producing shaped composite paper honeycomb articles in which a paper honeycomb pa...
Claims
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IPC IPC(8): D21H19/74D21H23/42
CPCB31D3/005D21H19/40Y10T428/24149D21H19/74D21H23/42D21H27/40B31D3/02B32B29/06
Inventor ISELI, FREDY
Owner ISELI FREDY