CA2217658A1 - A method for making expanded paper honeycomb core material moisture- or waterproof, and the thus obtained honeycomb core material - Google Patents
A method for making expanded paper honeycomb core material moisture- or waterproof, and the thus obtained honeycomb core material Download PDFInfo
- Publication number
- CA2217658A1 CA2217658A1 CA002217658A CA2217658A CA2217658A1 CA 2217658 A1 CA2217658 A1 CA 2217658A1 CA 002217658 A CA002217658 A CA 002217658A CA 2217658 A CA2217658 A CA 2217658A CA 2217658 A1 CA2217658 A1 CA 2217658A1
- Authority
- CA
- Canada
- Prior art keywords
- core material
- honeycomb core
- powder
- paper
- coating
- 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.)
- Abandoned
Links
- 239000011162 core material Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000011248 coating agent Substances 0.000 claims abstract description 16
- 238000000576 coating method Methods 0.000 claims abstract description 16
- 239000000843 powder Substances 0.000 claims abstract description 16
- 229920000642 polymer Polymers 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 229920001187 thermosetting polymer Polymers 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000004593 Epoxy Substances 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 239000002861 polymer material Substances 0.000 claims description 2
- 230000005855 radiation Effects 0.000 claims description 2
- 238000007654 immersion Methods 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 210000003850 cellular structure Anatomy 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
- B05D1/045—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field on non-conductive substrates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
- B31D3/00—Making articles of cellular structure, e.g. insulating board
- B31D3/02—Making articles of cellular structure, e.g. insulating board honeycombed structures, i.e. the cells having an essentially hexagonal section
- B31D3/0292—Making articles of cellular structure, e.g. insulating board honeycombed structures, i.e. the cells having an essentially hexagonal section involving auxiliary operations, e.g. expanding, moistening, glue-applying, joining, controlling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2401/00—Form of the coating product, e.g. solution, water dispersion, powders or the like
- B05D2401/30—Form of the coating product, e.g. solution, water dispersion, powders or the like the coating being applied in other forms than involving eliminable solvent, diluent or dispersant
- B05D2401/32—Form of the coating product, e.g. solution, water dispersion, powders or the like the coating being applied in other forms than involving eliminable solvent, diluent or dispersant applied as powders
Abstract
The invention relates to a method for making expanded paper honeycomb core material moisture- or waterproof, as well as the honeycomb core material obtained by using this method. According to the invention, the honeycomb core material is provided with a coating after expansion, the coating preferably being applied as a powder of a polymer plastic.
Description
CA 022176~8 1997-10-07 W O96/31339 PCT~L96/00150 A method for m~k; n~ expanded paper honeycomb core material moi~ture- or waterproof, and the thus obt~; ne~ honeycomb core material.
The invention relates to a method for making expanded paper honeycomb core material moisture- or waterproof, as well as the honeycomb core material obtained by using this method.
Paper honeycomb core material is often used as a stiff and light construction material. In a number of applications it is necessary for the paper honeycomb core material to be moisture- or waterproof, as for example in construction panels for outside use, for use in transport and for use in floors and such like. In these cases, the honeycomb core material is usually delivered in moisture- and waterproof condition, after which the user himself provides one or both sides of the honeycomb core material with a cover layer of plastic or metal, for example.
Paper honeycomb core material is obtained by glueing a number of strips of paper onto each other at certain places, and, after the glue has dried, expanding this parcel of paper by pulling the outer strips of paper apart laterally, thus obtaining the hexagonal cellular struc-ture. After the expanded shape has been stabilized, the honeycomb core material is cut into slices of the desired thickness, which are ~urther used as honeycomb core in honeycomb panels, for example.
It is known to make the paper honeycomb core material moisture- and waterproof after expansion by impregnating the paper. Impregnation is e~fected by immersing the ex-panded honeycomb core material in a solution of formal-CA 022176~8 1997-10-07 W O 96/31339 PCT~L96/00150 dehyde and water. In the known processes immersion usually takes place a number of times in order to apply the desired amount of resin. After immersion, the impregnated honeycomb core material must be dried with the aid of a 5 drying facility in order to remove the surplus of water from the honeycomb core material.
This way of making paper honeycomb core material moisture-and waterproof has a number of disadvantages. Formaldehyde 10 is a poisonous substance that makes recycling or dumping di~icult. Owing to the ~act that immersion has to take place a number of times, the treatment is time-consuming and elaborate, which results in high process costs.
Drying, at the end of the process, is an extra step in 15 which the solvent with formaldehydefumes must be disposed of in a safe manner.
It is an aim o~ the invention to provide a method ~or making expanded paper honeycomb core material moisture- or 20 waterproof which overcomes these disadvantages.
According to the invention, this aim is achieved by the measure that the honeycomb core material is provided with a coating after expansion.
This brings about, that the paper honeycomb core material is provided with a sealing layer that offers an effective protection against moisture and water. The coating can be applied in one layer, so that repeated immersions are not 30 necessary. Nor does ~ormaldehyde have to be used any more.
By applying the coating a coating-paper-coating-sandwich is obtained, which produces a lighter and stronger t construction as compared to impregnated paper. This method is cheaper than the one in which strips o~ paper are 35 provided with a coating before they are glued to one another and expanded, as less coating material is needed, that is not on the glued areas, and as the usual glues may CA 022l76~8 l997-lO-07 W O96/31339 PCT~L96/001~0 be used. In addition, expenses are saved because spoilage of honeycomb core material during production has not yet been provided with the cost price raising coating.
The coating is preferably applied as a powder of a polymer material, as, in this way, it is possible to apply a coating of essentially equal thickness across the entire length of the honeycomb cells within a short time.
In an advantageous embodiment of the method, powder is applied by providing the paper honeycomb core material and the powder with an opposed electric charge, as a result of which a predetermined amount of powder can be applied to the honeycomb core material simply and quickly, by al-lowing the honeycomb core material to attract the powderelectrically.
In this case it is advantageous to moisten the paper honeycomb core material with water before the powder is applied, as this makes it easier to give the paper honeycomb core material a suitable electric charge.
Moistening is pre~erably carried out by sprinkling with water, preferably such an amount of water being used, that a degree of humidity equal to 15-30 percentage by weight of the honeycomb paper is obtained. By sprinkling, the paper easily and quickly acquires an even, suitable degree of humidity. It has been established that the stated degree o~ humidity achieves good results in practice.
For the polymer powder, a thermosetting polyester or epoxy _ is preferably used, since a strong moisture- and waterproof coating can be made from a thermosetting polyester or epoxy or a mixture of the two.
In an advantageous manner the honeycomb core material is heated a~ter the thermosetting powder has been applied, in CA 022176~8 1997-10-07 W O 96/31339 PCT~L96/00150 order to let the powder turn into a hard and thick coating and to stabilize the coated honeycomb core material in the expanded state, in which the heating is pre~erably carried out by means of hot air or by in~rared radiation in order to obtain quick and even heating.
r~
The invention also relates to the paper honeycomb core material that is obtained with the method described above.
The invention relates to a method for making expanded paper honeycomb core material moisture- or waterproof, as well as the honeycomb core material obtained by using this method.
Paper honeycomb core material is often used as a stiff and light construction material. In a number of applications it is necessary for the paper honeycomb core material to be moisture- or waterproof, as for example in construction panels for outside use, for use in transport and for use in floors and such like. In these cases, the honeycomb core material is usually delivered in moisture- and waterproof condition, after which the user himself provides one or both sides of the honeycomb core material with a cover layer of plastic or metal, for example.
Paper honeycomb core material is obtained by glueing a number of strips of paper onto each other at certain places, and, after the glue has dried, expanding this parcel of paper by pulling the outer strips of paper apart laterally, thus obtaining the hexagonal cellular struc-ture. After the expanded shape has been stabilized, the honeycomb core material is cut into slices of the desired thickness, which are ~urther used as honeycomb core in honeycomb panels, for example.
It is known to make the paper honeycomb core material moisture- and waterproof after expansion by impregnating the paper. Impregnation is e~fected by immersing the ex-panded honeycomb core material in a solution of formal-CA 022176~8 1997-10-07 W O 96/31339 PCT~L96/00150 dehyde and water. In the known processes immersion usually takes place a number of times in order to apply the desired amount of resin. After immersion, the impregnated honeycomb core material must be dried with the aid of a 5 drying facility in order to remove the surplus of water from the honeycomb core material.
This way of making paper honeycomb core material moisture-and waterproof has a number of disadvantages. Formaldehyde 10 is a poisonous substance that makes recycling or dumping di~icult. Owing to the ~act that immersion has to take place a number of times, the treatment is time-consuming and elaborate, which results in high process costs.
Drying, at the end of the process, is an extra step in 15 which the solvent with formaldehydefumes must be disposed of in a safe manner.
It is an aim o~ the invention to provide a method ~or making expanded paper honeycomb core material moisture- or 20 waterproof which overcomes these disadvantages.
According to the invention, this aim is achieved by the measure that the honeycomb core material is provided with a coating after expansion.
This brings about, that the paper honeycomb core material is provided with a sealing layer that offers an effective protection against moisture and water. The coating can be applied in one layer, so that repeated immersions are not 30 necessary. Nor does ~ormaldehyde have to be used any more.
By applying the coating a coating-paper-coating-sandwich is obtained, which produces a lighter and stronger t construction as compared to impregnated paper. This method is cheaper than the one in which strips o~ paper are 35 provided with a coating before they are glued to one another and expanded, as less coating material is needed, that is not on the glued areas, and as the usual glues may CA 022l76~8 l997-lO-07 W O96/31339 PCT~L96/001~0 be used. In addition, expenses are saved because spoilage of honeycomb core material during production has not yet been provided with the cost price raising coating.
The coating is preferably applied as a powder of a polymer material, as, in this way, it is possible to apply a coating of essentially equal thickness across the entire length of the honeycomb cells within a short time.
In an advantageous embodiment of the method, powder is applied by providing the paper honeycomb core material and the powder with an opposed electric charge, as a result of which a predetermined amount of powder can be applied to the honeycomb core material simply and quickly, by al-lowing the honeycomb core material to attract the powderelectrically.
In this case it is advantageous to moisten the paper honeycomb core material with water before the powder is applied, as this makes it easier to give the paper honeycomb core material a suitable electric charge.
Moistening is pre~erably carried out by sprinkling with water, preferably such an amount of water being used, that a degree of humidity equal to 15-30 percentage by weight of the honeycomb paper is obtained. By sprinkling, the paper easily and quickly acquires an even, suitable degree of humidity. It has been established that the stated degree o~ humidity achieves good results in practice.
For the polymer powder, a thermosetting polyester or epoxy _ is preferably used, since a strong moisture- and waterproof coating can be made from a thermosetting polyester or epoxy or a mixture of the two.
In an advantageous manner the honeycomb core material is heated a~ter the thermosetting powder has been applied, in CA 022176~8 1997-10-07 W O 96/31339 PCT~L96/00150 order to let the powder turn into a hard and thick coating and to stabilize the coated honeycomb core material in the expanded state, in which the heating is pre~erably carried out by means of hot air or by in~rared radiation in order to obtain quick and even heating.
r~
The invention also relates to the paper honeycomb core material that is obtained with the method described above.
Claims (10)
1. A method for making expanded paper honeycomb core material moisture- or waterproof, characterized in that the honeycomb core material is provided with a coating after the expansion.
2. A method according to claim 1, characterized in that the coating is applied as a powder of a polymer material.
3. A method according to claim 2, characterized in that the powder is applied by providing the paper honeycomb core material and the powder with an opposed electric charge.
4. A method according to claim 3, characterized in that the paper honeycomb core material is moistened with water before the powder is applied.
5. A method according to claim 4, characterized in that the moistening takes place by sprinkling with water, preferably such an amount of water being used that a degree of humidity equal to 15-30 percentage by weight of the honeycomb paper is obtained.
6. A method according to one of the claims 2 up to and including 5, characterized in that a thermosetting polyester or epoxy is used for the polymer powder.
7. A method according to claim 6, characterized in that the honeycomb core material is heated after the thermosetting powder has been applied, in order to let the powder flow out into a hard and thick coating and to stabilize the coated honeycomb core material in the expanded state.
8. A method according to claim 7, characterized in that the heating is carried out by means of hot air.
9. A method according to claim 7, characterized in that the heating is carried out by means of infrared radiation.
10. Paper honeycomb core material provided with a coating that is obtained by the method described in one of the above claims.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL1000088 | 1995-04-07 | ||
| NL1000088A NL1000088C2 (en) | 1995-04-07 | 1995-04-07 | Method for rendering expanded paper honeycomb core material, and honeycomb core material obtained therewith, moisture- or water-resistant. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2217658A1 true CA2217658A1 (en) | 1996-10-10 |
Family
ID=19760850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002217658A Abandoned CA2217658A1 (en) | 1995-04-07 | 1996-04-09 | A method for making expanded paper honeycomb core material moisture- or waterproof, and the thus obtained honeycomb core material |
Country Status (13)
| Country | Link |
|---|---|
| EP (1) | EP0819053B1 (en) |
| KR (1) | KR19980703682A (en) |
| CN (1) | CN1184448A (en) |
| AU (1) | AU5126696A (en) |
| BR (1) | BR9604834A (en) |
| CA (1) | CA2217658A1 (en) |
| DE (1) | DE69602737T2 (en) |
| ES (1) | ES2135220T3 (en) |
| HU (1) | HUP9802331A3 (en) |
| MX (1) | MX9707722A (en) |
| NL (1) | NL1000088C2 (en) |
| PL (1) | PL322718A1 (en) |
| WO (1) | WO1996031339A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE197265T1 (en) * | 1996-07-30 | 2000-11-15 | Swap Technology Ag | CORRUGATED CARDBOARD CORE, METHOD AND DEVICE FOR PRODUCING SAME |
| CN1070415C (en) * | 1996-12-20 | 2001-09-05 | 洪志修 | Method for producing honey-comb like pressure resistant body jointing top and bottom plate |
| CN100448658C (en) * | 2005-10-01 | 2009-01-07 | 陈明新 | Process of producing honeycomb card board with waste paper product |
| DE102007034543B4 (en) | 2007-07-20 | 2018-11-22 | Fritz Egger Gmbh & Co. Og | Method and device for producing a lightweight board and lightweight board |
| EP2186940B1 (en) | 2008-11-14 | 2012-12-19 | Rühl Puromer GmbH | Method for continuous production of impregnated paper honeycomb |
| WO2015034479A1 (en) * | 2013-09-04 | 2015-03-12 | Halliburton Energy Services, Inc. | Nano-carbohydrate composites as a lost circulation materials - lcm origami and other drilling fluid applications |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2731379A (en) * | 1953-04-21 | 1956-01-17 | Union Bag & Paper Corp | Method of making honeycomb material |
| US3519510A (en) * | 1967-05-26 | 1970-07-07 | Edward J Ardolino | Formation of structural honeycomb |
| FR2171949A1 (en) * | 1972-02-16 | 1973-09-28 | Interlocking Systems Int | Honeycomb core structure - with firm bond to end facing sheets |
| FR2568513B1 (en) * | 1984-07-31 | 1986-11-14 | Hexagone | DRAWING-CALIBRATION PROCESS OF PAPER BAND WITH ALVEOLAR NETWORK AND MACHINE FOR IMPLEMENTING SAME |
-
1995
- 1995-04-07 NL NL1000088A patent/NL1000088C2/en not_active IP Right Cessation
-
1996
- 1996-04-09 EP EP96907796A patent/EP0819053B1/en not_active Expired - Lifetime
- 1996-04-09 CN CN96193924.9A patent/CN1184448A/en active Pending
- 1996-04-09 MX MX9707722A patent/MX9707722A/en not_active Application Discontinuation
- 1996-04-09 AU AU51266/96A patent/AU5126696A/en not_active Abandoned
- 1996-04-09 ES ES96907796T patent/ES2135220T3/en not_active Expired - Lifetime
- 1996-04-09 KR KR1019970707081A patent/KR19980703682A/en not_active Application Discontinuation
- 1996-04-09 HU HU9802331A patent/HUP9802331A3/en unknown
- 1996-04-09 CA CA002217658A patent/CA2217658A1/en not_active Abandoned
- 1996-04-09 PL PL96322718A patent/PL322718A1/en unknown
- 1996-04-09 DE DE69602737T patent/DE69602737T2/en not_active Expired - Fee Related
- 1996-04-09 BR BR9604834A patent/BR9604834A/en not_active Application Discontinuation
- 1996-04-09 WO PCT/NL1996/000150 patent/WO1996031339A1/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| MX9707722A (en) | 1998-02-28 |
| NL1000088C2 (en) | 1996-10-08 |
| HUP9802331A3 (en) | 1999-03-01 |
| CN1184448A (en) | 1998-06-10 |
| DE69602737D1 (en) | 1999-07-08 |
| EP0819053B1 (en) | 1999-06-02 |
| ES2135220T3 (en) | 1999-10-16 |
| DE69602737T2 (en) | 2000-03-09 |
| AU5126696A (en) | 1996-10-23 |
| PL322718A1 (en) | 1998-02-16 |
| HUP9802331A2 (en) | 1999-01-28 |
| KR19980703682A (en) | 1998-12-05 |
| EP0819053A1 (en) | 1998-01-21 |
| BR9604834A (en) | 1999-01-05 |
| WO1996031339A1 (en) | 1996-10-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |