IE83669B1 - Fire retardant cladding panels - Google Patents
Fire retardant cladding panelsInfo
- Publication number
- IE83669B1 IE83669B1 IE1999/0684A IE990684A IE83669B1 IE 83669 B1 IE83669 B1 IE 83669B1 IE 1999/0684 A IE1999/0684 A IE 1999/0684A IE 990684 A IE990684 A IE 990684A IE 83669 B1 IE83669 B1 IE 83669B1
- Authority
- IE
- Ireland
- Prior art keywords
- fire retardant
- base coat
- veneer sheet
- coat
- decorative
- Prior art date
Links
- 239000003063 flame retardant Substances 0.000 title claims description 30
- 238000005253 cladding Methods 0.000 title claims description 15
- 239000011248 coating agent Substances 0.000 claims description 18
- 238000000576 coating method Methods 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 16
- 239000000758 substrate Substances 0.000 claims description 16
- 239000002131 composite material Substances 0.000 claims description 15
- 238000005507 spraying Methods 0.000 claims description 13
- 239000004922 lacquer Substances 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 230000001276 controlling effect Effects 0.000 claims description 2
- 230000001105 regulatory Effects 0.000 claims description 2
- 239000003973 paint Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- JDSHMPZPIAZGSV-UHFFFAOYSA-N Melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- ODGAOXROABLFNM-UHFFFAOYSA-N Polynoxylin Chemical compound O=C.NC(N)=O ODGAOXROABLFNM-UHFFFAOYSA-N 0.000 description 1
- 240000002799 Prunus avium Species 0.000 description 1
- 244000305267 Quercus macrolepis Species 0.000 description 1
- 235000016976 Quercus macrolepis Nutrition 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive Effects 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 235000019693 cherries Nutrition 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 125000002270 phosphoric acid ester group Chemical group 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Description
Fire Retardant Claddingfanels
Introduction
The invention relates to the manufacture of fire retardant wooden cladding panels,
and in particular to veneered cladding panels.
In many building applications in which wooden panels are used, it is necessary to
provide some fire resistance to the panels. To this end, a number of fire resistant
paints and varnishes for coating a surface of a cladding panel are available such
as those described in Patent Specification Nos. US 5,206,088, US 4,849,298,
US 4,099,975 and US 3,915,777, for example, which operate with varying degrees
of success. The manner of application of the paint to a substrate can have a
significant bearing on the fire resistant properties imbued to the substrate.
It is an object of the present invention to provide a new and improved composite
fire retardant wooden cladding panel and a method for manufacturing composite
veneered wooden panels with good fire resistance in an efficient and cost effective
manner.
Statements of invention
According to the invention, there is provided a composite fire retardant wooden
cladding panel comprising a wooden substrate board having a front face and a
rear face, a decorative first veneer sheet bonded to the front face of the substrate
board covering said front face, a second veneer sheet bonded to the rear face of
the substrate board covering said rear face, a fire retardant outer coating covering
at least an outer exposed front surface of the decorative first veneer sheet, said
fire retardant outer coating comprising an inner base coat of at least two layers to
a desired thickness of a water based intumescent lacquer and an outer top coat of
a desired thickness of a solvent based catalysed lacquer, the base coat covering
the outer surface of the veneer sheet at a rate of at least 380 g/m2. If desired,
outer surfaces of both veneer sheets can be covered with the fire retardant
coating.
In a particularly preferred embodiment, the top coat covers the outer surface of the
or each veneer sheet at a rate of at least 90 glmz.
In another aspect of the invention, there is provided a method for manufacturing a
composite fire retardant wooden cladding panel, comprising the steps:-
bonding a decorative first veneer sheet to a front face of a wooden substrate
board and bonding a second veneer sheet to a rear face of the substrate
board to form a composite panel,
spraying a fire retardant outer coating onto at least an outer exposed front
surface of the decorative first veneer sheet in a controlled manner,
the fire retardant coating comprising an inner base coat of a water based
intumescent lacquer and an outer top coat of a solvent based catalysed
lacquer,
spraying the base coat onto the front surface of the decorative veneer sheet in
at least two layers to build up a desired thickness of base coat on the surface
of the decorative veneer sheet, the second and any subsequent layer being
applied over the preceding layer whilst said preceding layer is still wet, the base
coat being applied at a rate of at least 380g/m’
drying the base coat,
sanding the base coat,
spraying the top coat over the base coat to provide a top coat of a desired
thickness over the base coat, and
drying the top coat.
In one embodiment of the invention, the base coat and top coat are sprayed onto the
panel at a pressure in the range 30—35lbs per square inch (2.07 — 2.41 bar).
In a preferred embodiment, the base coat is applied to the decorative veneer sheet in
two layers.
in another embodiment, each layer of the base coat has a wet film thickness of at least
microns.
In another embodiment, the top coat is applied at a rate of at least 90 glmz.
in a particularty preferred embodiment, the method includes drying the base coat in a
drying room, controlling the temperature in the drying room to about 20°C and the
relative humidity within the drying room to about 50%.
in a further embodiment, the method includes regulating the moisture content of the
veneer sheet such that it does not exceed 15% prior to spraying the fire retardant
coating onto the veneer sheet.
Preferably, the method includes maintaining the moisture content of the veneer sheet
within the range 10-12%.
In some cases, if desired, both veneer sheets are coated with the fire retardant
coating.
Detailed Description of the Invention
The invention will be more clearly understood by reference to the accompanying
drawing which is a schematic flowchart illustrating a method and apparatus for
manufacturing the fire retardant wooden cladding panels of the invention.
Referring to the drawing, at a veneering station 10, a wooden substrate board,
which may conveniently be of medium density fibre board or other composite
board, is coated on both sides with veneer sheets which are bonded to front and
rear faces of the substrate board with adhesive in conventional fashion to form a
composite panel. A veneer sheet applied to the front face of the substrate board
is of a good quality decorative veneer such as American oak for example, as this
face of the panel will be exposed to view in use. The veneer sheet applied to the
rear face of the substrate board may also be a high quality decorative veneer if
said rear face will be exposed in use. More usually, as the rear face will, in use,
be hidden from view — facing a wall on which the panel is mounted, for example —
a lower quality veneer such as Gabon veneer can be used.
Each veneered panel is delivered to a spraying station 12 at which a fire retardant
outer coating is sprayed onto at least the outer exposed front surface of the
decorative veneer sheet in a controlled manner. If, as mentioned previously, the
rear face of the panel will also be exposed in use, it will also be covered with the
fire retardant coating.
The fire retardant coating comprises an inner base coat of a water based
intumescent lacquer and an outer coat of a solvent based catalysed lacquer.
The base coat is sprayed onto the panel in two layers, each layer of the base coat
having a wet film thickness of at least 150 microns. it will be noted that after the
first layer has been applied to the panel, it is only allowed to partially dry and then
the second layer is applied over the first layer whilst the first layer is still wet.
The base coat has two components which are mixed together immediately before
application. The first component comprises melamine fomtaldehyde resin urea
formaldehyde and the second component is phosphoric acid ester solution. It will
be noted that with some veneers such as cherry, for example, a primer will be
applied to the panel before the base coat. Overall, the base coat is applied at a
rate of about 380 g/m2.
A number of the panels to which both layers of the base coat have been applied
are mounted spaced-apart on a rack which is delivered into a drying room 14. The
panels are dried for about two hours within the drying room 14, the temperature
being controlled to about 20°C and the relative humidity to about 50% within the
drying room.
Downstream of the drying room 14, the panels are delivered to a sanding station
16 at which each panel has a surface of the base coat lightly abraded. After
cleaning 18 the abraded surface, the panels are returned to the spraying station
12 for spraying the top coat over the base coat on each panel. The top coat is
applied by spraying to about 95 microns wet film thickness at a rate of about
g/m2 and is then left to dry 18 in ambient air.
The top coat is a two component lacquer, the components being mixed
immediately prior to application. The first component is a composition of amino
acids and alkalyd resins and vinyl polymers, and the second component is a dilute
solution of sulphuric acid.
It will be noted that for optimum results, it is desirable to carefully control the
spraying of both the base coat and the top coat onto the panel. In this regard,
spray equipment which provides a high volume low pressure (in the order of 30-
lbs per square inch) spray gives best results.
It is also desirable to regulate the moisture content of each veneer sheet to which
the protective coating is to be applied such that it does not exceed 15%, and most
preferably the moisture content is within the range 10-12%.
The invention is not limited to the embodiments hereinbefore described which may
be varied in both construction and detail within the scope of the appended claims.
Claims (1)
- CLAIMS A composite fire retardant wooden cladding panel comprising a wooden substrate board having a front face and a rear face, a decorative first veneer sheet bonded to the front face of the substrate board covering said front face, a second veneer sheet bonded to the rear face of the substrate board covering said rear face, a fire retardant outer coating covering at least an outer exposed front surface of the decorative first veneer sheet, said fire retardant outer coating comprising an inner base coat of at least two layers to a desired thickness of a water based intumescent lacquer and an outer top coat of a desired thickness of a solvent based catalysed lacquer, the base coat covering the outer surface of the or each veneer sheet at a rate of at least 380 g/m2. A composite fire retardant wooden cladding panel as claimed in claim 1, wherein outer surface of both veneer sheets are covered with the fire retardant coating. A composite fire retardant wooden cladding panel as claimed in any preceding claim, wherein the top coat covers the outer surface of the or each veneer sheet at a rate of at least 90 g/m2. A composite fire retardant wooden cladding panel substantially as hereinbefore described with reference to the accompanying drawing. A method for manufacturing a composite fire retardant wooden cladding panel of the type claimed in claim 1, comprising the steps:- bonding a decorative first veneer sheet to a front face of a wooden substrate board and bonding a second veneer sheet to a rear face of the substrate board to form a composite panel, spraying a fine retardant outer coating onto at least an outer exposed front surface of the decorative first veneer sheet in a controlled manner, the fire retardant coating comprising an inner base coat of a water based inturnescent lacquer and an outer top coat of a solvent based catalysed lacquer, spraying the base coat onto the front surface of the decorative veneer sheet in at least two layers to build up a desired thickness of base coat on the surface of the decorative veneer sheet, the second and any subsequent layer being applied over the preceding layer whilst said preceding layer is still wet, the base coat being applied at a rate of at least 380g/m2, drying the base coat, sending the base coat, spraying the top coat over the base coat to provide a top coat of a desired thickness over the base coat, and drying the top coat. A method as claimed in claim 5 wherein the base coat and top coat are sprayed onto the panel at a pressure in the range of 30-35lbs per square inch (2.07 — 2.41 bar). A method as claimed in claim 5 or 6 wherein the base coat is applied to the decorative veneer sheet in two layers. A method as claimed in claim 7, wherein each layer of the base coat has a wet film thickness of at least 150 microns. A method as claimed in any of claims 5 to 8, wherein the top coat is applied at a rate of at least 90 g/m2. A method as claimed in any of claims 5 to 9, including drying the base coat in a drying room, controlling the temperature in the drying room to about 20°C and the relative humidity within the drying room to about 50%. A method as claimed in any of claims 5 to 10, including regulating the moisture content of the veneer sheet such that it does not exceed 15% prior to spraying the fire retardant coating onto the veneer sheet. A method as claimed in claim 11, including maintaining the moisture content of the veneer sheet within the range 10-12%. A method as claimed in any of claims 5 to 12, wherein both veneer sheets are coated with the fire retardant coating. A method for manufacturing a composite fire retardant wooden cladding panel substantially as hereinbefore described with reference to the accompany drawing. A composite fire retardant wooden cladding panel whenever produced by the method as claimed in any of claims 5 to 14.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IE1999/0684A IE83669B1 (en) | 1999-08-13 | Fire retardant cladding panels | |
GB0017489A GB2354189B (en) | 1999-08-13 | 2000-07-18 | Fire retardant cladding panels |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IE1999/0684A IE83669B1 (en) | 1999-08-13 | Fire retardant cladding panels |
Publications (2)
Publication Number | Publication Date |
---|---|
IE990684A1 IE990684A1 (en) | 2001-02-21 |
IE83669B1 true IE83669B1 (en) | 2004-11-17 |
Family
ID=
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7771837B2 (en) | Derived timber board with a surface coating applied at least in parts | |
RU2458796C2 (en) | Method of producing laminate | |
KR100918559B1 (en) | Interior product having transfer-printed base layer and process for preparing the same | |
US7919144B2 (en) | Sheet-or web-like, decorative coating film and method for producing the same | |
JP5322734B2 (en) | Floor heating floor material and manufacturing method thereof | |
WO2002083326A1 (en) | Method of finishing with heat insulation coating | |
AU2011347578A1 (en) | High-gloss surface by means of hot-coating | |
JP2000274054A (en) | Moisture-proof floor material | |
CA2447611C (en) | Method and device for producing veneer and veneered parts | |
CA2447609C (en) | Method and device for producing parts having a sealing layer on the surface, and corresponding parts | |
WO2009086507A2 (en) | Method and system for coating wood substrates using organic coagulants | |
GB2354189A (en) | Fire retardant cladding panels | |
JP3185675B2 (en) | Wood veneer | |
IE83669B1 (en) | Fire retardant cladding panels | |
IES990683A2 (en) | Fire retardant cladding panels | |
US4554959A (en) | Surface treatment of sheet material | |
CA2683062A1 (en) | In line web treating and substrate forming method for overlaid products | |
JP2001121516A (en) | Surface-coated wood finishing material | |
JP3812991B2 (en) | Method for producing heat-resistant decorative board | |
JP2894185B2 (en) | Wood board and flooring | |
US20220402161A1 (en) | Method for producing a veneered board | |
JP2004339346A (en) | Coating material composition for impregnation, and porous building material and method for producing the same | |
CN115256582A (en) | Water-based melamine resin wood board | |
US20050175779A1 (en) | Method of producing decorative sheets, in particular, finish sheets for flooring, furniture or wall covering panels | |
JP3381616B2 (en) | Surface finishing method |