CA1279807C - Composite panel that is difficult to combust and produces little smoke, and process for manufacturing same - Google Patents
Composite panel that is difficult to combust and produces little smoke, and process for manufacturing sameInfo
- Publication number
- CA1279807C CA1279807C CA000528197A CA528197A CA1279807C CA 1279807 C CA1279807 C CA 1279807C CA 000528197 A CA000528197 A CA 000528197A CA 528197 A CA528197 A CA 528197A CA 1279807 C CA1279807 C CA 1279807C
- Authority
- CA
- Canada
- Prior art keywords
- core layer
- composite panel
- panel according
- layers
- adhesive
- 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.)
- Expired - Fee Related
Links
Abstract
ABSTRACT
Composite panels with plastic core of polyvinylchloride and metal outer layers bonded to the core by means of adhesive layers, including those where flame retardant additives are incorporated in the plastic core, do not exhibit completely satisfactory properties for certain applications, in particular with respect to behavior under fire conditions viz., the creation of smoke. Composite panels having a plastic core of post-chlorinated polyvinylchloride or a mixture of the same with polyvinylchloride avoid these disadvantages.
Composite panels with plastic core of polyvinylchloride and metal outer layers bonded to the core by means of adhesive layers, including those where flame retardant additives are incorporated in the plastic core, do not exhibit completely satisfactory properties for certain applications, in particular with respect to behavior under fire conditions viz., the creation of smoke. Composite panels having a plastic core of post-chlorinated polyvinylchloride or a mixture of the same with polyvinylchloride avoid these disadvantages.
Description
B~CKGROUNn OF TH~ INVENTION
The invention relates to a composite panel that is difficult to combust, produces little smoke and can be shaped at room temperature by non-chip-forming methods, said panel compr;sing a core layer of thermoplastic plastic between metal outer sheets bonded to the same by adhesive layers, and relates also to a process for manufacturing the said composite panel.
Known composite panels that can be shaped a~ room temperature using non-chip-forming methods i.e. by bending, stretch drawing and/or stretch deep-drawing, have plastic cores of polyolefins or polyvinylchloride.
A composite having a polyolefin core is classified according to the known specifications e.g. DIN 4102 as having "normal combustibility", which can result in limit~tions in its application.
A composite having a core of polyvinylchloride, in particular hard polyvinylchloride is classified according to DI~ 4102 as being "difficult to combust"
which permits a wider range of application.
A disadvantage of the hard polyvinylchloride core is however the amount of ~moke it produces in a fire.
Such core layexs in the form of compact, hard polyvinylchloride exhibit smoke index values, measured according to ASTM E-84, of 900-1400 and i~ the form of 38(~7 foamed hard polyvinylchlor.ide containing flame retardant, values of 500-1400. ~uch composite panels, containlng a core having a smoke index value of more than 450, are not classified as materials of combustibility class 1 or class A of the U.SO Build-ing Model Codes; this standard is usually taken for reference purposes where national standards of -that kind are lacking.
The present invention seeks to develop a light composite panel of the foregoing type which is difficult to combust, produces little smoke and can be shaped plasticially at room temperature, and to develop a process for manufacturing such a composite panel, by means of which the above mentioned disad-vantages are avoided viz., in particular the unfavor-able development of smoke of the core in a fire, characterized by a smoke index value of more than 450 according to ASTM E-84. The composite panel should therefore be light, rigid, plastically formable at room temperature and difficult to combust (acc. to DIN 4102); the core should exhibit a smoke denisty index of less than 450 (acc. to ASTM E-84), so that the composite panel is classified as being of com-bustibility class 1 or A of the above mentioned U.S.
standard.
~'7~3~3C)7 In accordance wi-th the invention a com-posite panel is characterized by a thermoplastic core layer and metal outer layers which are joined together by means of adhesive layers, in which the core layer comprises a post-chlorinated polyvinyl-chloride con-taining inorganic filler and the adhesive layer between -the core layer and the outer layer comprises two adhesive layers bonded to each other.
Because of its high viscosity in the molten state~ post-chlorinated polyvinylchloride can be extruded or extrusion foamed only by means of con-siderable technical effort that requires special equipment which is not commercially available.
The further development of the composite panel according to the presen-t invention is -therefore particularly advantageous when the composite panel is characterized by a thermoplastic core layer and metal outer layers which are joined together by means of adhesive layers, in which the core layer comprises a mixture of hard polyvinylchloride and post-chlori-nated polyvinylchloride containing inorganic filler and the adhesive layer between the core layer and the outer layer comprises two adhesive layers bonded to each other.
Further versions of the composite panel according to the invention are characteri2ed by way of the 3~3C)~
features discussed hereinbelow. Thus the Favorable smoke development behavior of post-chlorinated polyvinylchloride are combined with the favorable viscosity characteristics of hard polyviny]chloride during extrusion of foaming for the manufacture of the core layer~
A foamed core layer is, however, favorable for the composite panel accordin~ to the invention, this for reasons of a small amount of combustible material per unit volume, low weight of the panel which in accordance with the objective is to be light-weight, and a higher specific bending stiffness (E.J/g~ ~ompared with a compac~ core, wherein E means kilo newton per square millimeters lS (i.e. load per area) J means millimeters to the power 4 (i.e. width, thickness to the power 3), and G means grams (i.e. weight of composite material).
With respect to the production of the panel according to the invention the object of the invention is achieved charac~erized by the process steps production of a compact or foamed core layer by extrusion, deposition of a layer of adhesive in the form o a thermoplastic adhesive film on both sides of the core layer; pre-heating the adhesive layer and the outer ~, ~d ~ 9 8 07 ~6-373 layer in a continuous heating furnace or over `heate(l rolls; bonding together all layers by the app]ication Oe pre~sure and heat. The further development of the process is wherein said foamed core layer is subjected to intensive cooling and smoothing as it leaves the extrusion tool in order to form a pore-free sur~ace.
~RIEF DESCRIPTION OF THE DRAWING
The present invention will be more readily understandable from a consideration of the appended drawing which shows a cross-section of a composite panel of the present invention.
DET~ILED DESCRIPTION
The production of the composite panel according to the invention can be both via a continuous production process or in a plurality of separate production steps.
In the continuous process i~ is advantageous first to mix post-chlorinated polyvinylchloride and hard polyvinylchloride as the main constituent along with the usual stabilizers and lubricants required for extrusion, flame retardant filler materials and possibly foaming substanceæ, and namely in such ratios that a Cl-content of 55-72 wt.-% is obtained in the mixture. Preferred flame re~ardant filler materials are metal oxides such ~:'7''3~
~ Sb23; Mo3; Fe23; C~l2; CuO; NiO; ZnO;
MgO and/or metal hydroxides such as Al(OH)3; 2 %nO . 3 B~03 . 3.5 H2O and/or metal carbonates such as CaCO3, MgCO3. The filler may be used and/or metal phosphates, in quantities of 1.0-50 wt.-~, preferably 3-10%, and qrain sizes of 0.2-10 u~m in diameter. The mixture is plasticized in an extruder and pressed through a shaping tool to form a 0.5-22 mm thick, up to 2000 mm broad strip. Preferably, the particles of inorganic filler material are, with respect to the weight of the filler material, coated with 2% stearic acid.
Preferably the plastic of the core layer contains between 30 and 95% of post-chlorinated polyvinylchloride and the post-chlorinated polyvinylchloride has a chlorine content of 63-72%. The density of this thermoplastic, compact or, as a result of foaming agents in the mixture, foamed plastic strip lies in the range 0.2-1.8 g~cm3 and preferably 0.5-0.8 g/cm3 and a thickness of 0~1-2 mm. In the case of the foamed plastic strip there is a plurality of more or less uniformly distributed pores 2-100 u~m in diameter ~hroughout the cross-section of the strip. The pores however do not appear at the surface of the strip in the form of a rough surface; instead they lie some ~m below 9a~)7 ~6-373 the surEace so that the extru-le-l, foamed plastic strip exhibits a smooth, pore-free surface.
In the next stage of the continuous production process the extruded plastic strip, which represents the core layer of the composite panel being manufactured, i9 coated with a suitable thermoplastic adhesive which is preferably deposited in the form of 10-200 ~m thicX
thermoplastic adhesive foils that initially adhere to the core as a result of electrostatic forces of attraction. Preferably, at least one layer of the adhesive layers exhibits combustion and smoke inhibiting properties. Preferably also the layer of the adhesive on the side towards the outer layer is of a thermoplastic material bonding well to the outer layer, and the layer of adhesive on the side towards the core layer is of a thermoplastic material bonding well to the core layer, and at least one of the layers of adhesive is made flame retardant using a flame retardant substance for thermoplastics comprising a material selected from the group consisting of halogenated paraffins, antimony oxide and mi~tures thereof.
On the application of pressure and heat the aflhesive-coated core is combined in the further stages of the continuous production process along with pre-heated metal outer layers, in particular aluminum, ''3~
aluminum alloys or steel o~ thickness 0.1-2 mm, to form a strip, sy~metrical or unsymmetrical i.e. with both sides of different metal layers or of different thickness, that represents a composite with a laminar, sandwich type structure.
In this process of joining the outer layers to the core layer, also called lamination, the metal outer layers are unrolled from coils on so called spools and, after pre-heating by uncoiling rolls, drawn through a '.aminating device. The laminating device comprises machine elements such as pairs of rolls or moving caterpillar type tracks or backed steel strips that act on both sides of the composite strip moving or rolling with it and transferring pressure and heat to the said strip.
The heat and pressure applied in the laminating device effect the adhesive bonding o the metal outer layers to the plastic core with the aid of the above mentioned adhesive layers or foils.
After the composite strip has passed through the cooling zone to cool it down from the laminating temperature, a flyin~ saw or transverse dividing unit situated after the last pair of rolls cuts the strip into individual composite panelsO
One version For prod~cing the composite panel accord;ng to the invention in a plurality of ~eparate production steps is such that the extruded thermoplastic core layer is coiled. This coil is then installed on an uncoiling device at the input end of a laminatiny device corresponding to that employed in tha continuous production process, uncoiled so that at the same time adhesive or adhesive foil is applied to both sides and, as described above for the continuous production process, clad on both sides with pre-heated metal outer layers. The resultant composite strip is finally divided transversely into composite panels.
In another version of the production of the composite panel according to the invention, in separate production steps the extru~ed thermoplastic core layer is divided into panel lengths that are then clad with metal outer sheets on a laminating device using adhesive layers. The adhesives can be deposited either on the metallic outer layers or on the plastic core of the composite or as adhesive foils between the core and the outer layers prior to the lamination step. The laminating device can be a device with rotating, heated pressure elements in the form of caterpillar tracks or steel strips that join ~he materials as they rotate applying pressure and heat to the same, or it can be a press with heated pressure plates.
~ \
8~
~6-373 An ar]vantageous version of the composite panel accorcling to the invention is illustrated schematically in the drawing. This shows in cross-section a composite pane] 1 having a foamed core 2 with uniformly distributed gas pores S and, on both sides of the core 5, metal outer layers 3 and 4 which are bonded to the core layer with the aid of relatively thin adhesive layers 6.
The core 2 of the composite panel 1 comprises a mixture of hard polyvinylchloride and post-chlorinated polyvinylchloride to which smoke and combustion suppressing inorganic fillers have been added. The gas pores 5 are created by the addition of a foaming agent to the polyvinylchloride mixture. As can be seen from the drawing the gas pores are always below the surface of the core layer 2 and produce therefore no recesses in the surface.
The invention relates to a composite panel that is difficult to combust, produces little smoke and can be shaped at room temperature by non-chip-forming methods, said panel compr;sing a core layer of thermoplastic plastic between metal outer sheets bonded to the same by adhesive layers, and relates also to a process for manufacturing the said composite panel.
Known composite panels that can be shaped a~ room temperature using non-chip-forming methods i.e. by bending, stretch drawing and/or stretch deep-drawing, have plastic cores of polyolefins or polyvinylchloride.
A composite having a polyolefin core is classified according to the known specifications e.g. DIN 4102 as having "normal combustibility", which can result in limit~tions in its application.
A composite having a core of polyvinylchloride, in particular hard polyvinylchloride is classified according to DI~ 4102 as being "difficult to combust"
which permits a wider range of application.
A disadvantage of the hard polyvinylchloride core is however the amount of ~moke it produces in a fire.
Such core layexs in the form of compact, hard polyvinylchloride exhibit smoke index values, measured according to ASTM E-84, of 900-1400 and i~ the form of 38(~7 foamed hard polyvinylchlor.ide containing flame retardant, values of 500-1400. ~uch composite panels, containlng a core having a smoke index value of more than 450, are not classified as materials of combustibility class 1 or class A of the U.SO Build-ing Model Codes; this standard is usually taken for reference purposes where national standards of -that kind are lacking.
The present invention seeks to develop a light composite panel of the foregoing type which is difficult to combust, produces little smoke and can be shaped plasticially at room temperature, and to develop a process for manufacturing such a composite panel, by means of which the above mentioned disad-vantages are avoided viz., in particular the unfavor-able development of smoke of the core in a fire, characterized by a smoke index value of more than 450 according to ASTM E-84. The composite panel should therefore be light, rigid, plastically formable at room temperature and difficult to combust (acc. to DIN 4102); the core should exhibit a smoke denisty index of less than 450 (acc. to ASTM E-84), so that the composite panel is classified as being of com-bustibility class 1 or A of the above mentioned U.S.
standard.
~'7~3~3C)7 In accordance wi-th the invention a com-posite panel is characterized by a thermoplastic core layer and metal outer layers which are joined together by means of adhesive layers, in which the core layer comprises a post-chlorinated polyvinyl-chloride con-taining inorganic filler and the adhesive layer between -the core layer and the outer layer comprises two adhesive layers bonded to each other.
Because of its high viscosity in the molten state~ post-chlorinated polyvinylchloride can be extruded or extrusion foamed only by means of con-siderable technical effort that requires special equipment which is not commercially available.
The further development of the composite panel according to the presen-t invention is -therefore particularly advantageous when the composite panel is characterized by a thermoplastic core layer and metal outer layers which are joined together by means of adhesive layers, in which the core layer comprises a mixture of hard polyvinylchloride and post-chlori-nated polyvinylchloride containing inorganic filler and the adhesive layer between the core layer and the outer layer comprises two adhesive layers bonded to each other.
Further versions of the composite panel according to the invention are characteri2ed by way of the 3~3C)~
features discussed hereinbelow. Thus the Favorable smoke development behavior of post-chlorinated polyvinylchloride are combined with the favorable viscosity characteristics of hard polyviny]chloride during extrusion of foaming for the manufacture of the core layer~
A foamed core layer is, however, favorable for the composite panel accordin~ to the invention, this for reasons of a small amount of combustible material per unit volume, low weight of the panel which in accordance with the objective is to be light-weight, and a higher specific bending stiffness (E.J/g~ ~ompared with a compac~ core, wherein E means kilo newton per square millimeters lS (i.e. load per area) J means millimeters to the power 4 (i.e. width, thickness to the power 3), and G means grams (i.e. weight of composite material).
With respect to the production of the panel according to the invention the object of the invention is achieved charac~erized by the process steps production of a compact or foamed core layer by extrusion, deposition of a layer of adhesive in the form o a thermoplastic adhesive film on both sides of the core layer; pre-heating the adhesive layer and the outer ~, ~d ~ 9 8 07 ~6-373 layer in a continuous heating furnace or over `heate(l rolls; bonding together all layers by the app]ication Oe pre~sure and heat. The further development of the process is wherein said foamed core layer is subjected to intensive cooling and smoothing as it leaves the extrusion tool in order to form a pore-free sur~ace.
~RIEF DESCRIPTION OF THE DRAWING
The present invention will be more readily understandable from a consideration of the appended drawing which shows a cross-section of a composite panel of the present invention.
DET~ILED DESCRIPTION
The production of the composite panel according to the invention can be both via a continuous production process or in a plurality of separate production steps.
In the continuous process i~ is advantageous first to mix post-chlorinated polyvinylchloride and hard polyvinylchloride as the main constituent along with the usual stabilizers and lubricants required for extrusion, flame retardant filler materials and possibly foaming substanceæ, and namely in such ratios that a Cl-content of 55-72 wt.-% is obtained in the mixture. Preferred flame re~ardant filler materials are metal oxides such ~:'7''3~
~ Sb23; Mo3; Fe23; C~l2; CuO; NiO; ZnO;
MgO and/or metal hydroxides such as Al(OH)3; 2 %nO . 3 B~03 . 3.5 H2O and/or metal carbonates such as CaCO3, MgCO3. The filler may be used and/or metal phosphates, in quantities of 1.0-50 wt.-~, preferably 3-10%, and qrain sizes of 0.2-10 u~m in diameter. The mixture is plasticized in an extruder and pressed through a shaping tool to form a 0.5-22 mm thick, up to 2000 mm broad strip. Preferably, the particles of inorganic filler material are, with respect to the weight of the filler material, coated with 2% stearic acid.
Preferably the plastic of the core layer contains between 30 and 95% of post-chlorinated polyvinylchloride and the post-chlorinated polyvinylchloride has a chlorine content of 63-72%. The density of this thermoplastic, compact or, as a result of foaming agents in the mixture, foamed plastic strip lies in the range 0.2-1.8 g~cm3 and preferably 0.5-0.8 g/cm3 and a thickness of 0~1-2 mm. In the case of the foamed plastic strip there is a plurality of more or less uniformly distributed pores 2-100 u~m in diameter ~hroughout the cross-section of the strip. The pores however do not appear at the surface of the strip in the form of a rough surface; instead they lie some ~m below 9a~)7 ~6-373 the surEace so that the extru-le-l, foamed plastic strip exhibits a smooth, pore-free surface.
In the next stage of the continuous production process the extruded plastic strip, which represents the core layer of the composite panel being manufactured, i9 coated with a suitable thermoplastic adhesive which is preferably deposited in the form of 10-200 ~m thicX
thermoplastic adhesive foils that initially adhere to the core as a result of electrostatic forces of attraction. Preferably, at least one layer of the adhesive layers exhibits combustion and smoke inhibiting properties. Preferably also the layer of the adhesive on the side towards the outer layer is of a thermoplastic material bonding well to the outer layer, and the layer of adhesive on the side towards the core layer is of a thermoplastic material bonding well to the core layer, and at least one of the layers of adhesive is made flame retardant using a flame retardant substance for thermoplastics comprising a material selected from the group consisting of halogenated paraffins, antimony oxide and mi~tures thereof.
On the application of pressure and heat the aflhesive-coated core is combined in the further stages of the continuous production process along with pre-heated metal outer layers, in particular aluminum, ''3~
aluminum alloys or steel o~ thickness 0.1-2 mm, to form a strip, sy~metrical or unsymmetrical i.e. with both sides of different metal layers or of different thickness, that represents a composite with a laminar, sandwich type structure.
In this process of joining the outer layers to the core layer, also called lamination, the metal outer layers are unrolled from coils on so called spools and, after pre-heating by uncoiling rolls, drawn through a '.aminating device. The laminating device comprises machine elements such as pairs of rolls or moving caterpillar type tracks or backed steel strips that act on both sides of the composite strip moving or rolling with it and transferring pressure and heat to the said strip.
The heat and pressure applied in the laminating device effect the adhesive bonding o the metal outer layers to the plastic core with the aid of the above mentioned adhesive layers or foils.
After the composite strip has passed through the cooling zone to cool it down from the laminating temperature, a flyin~ saw or transverse dividing unit situated after the last pair of rolls cuts the strip into individual composite panelsO
One version For prod~cing the composite panel accord;ng to the invention in a plurality of ~eparate production steps is such that the extruded thermoplastic core layer is coiled. This coil is then installed on an uncoiling device at the input end of a laminatiny device corresponding to that employed in tha continuous production process, uncoiled so that at the same time adhesive or adhesive foil is applied to both sides and, as described above for the continuous production process, clad on both sides with pre-heated metal outer layers. The resultant composite strip is finally divided transversely into composite panels.
In another version of the production of the composite panel according to the invention, in separate production steps the extru~ed thermoplastic core layer is divided into panel lengths that are then clad with metal outer sheets on a laminating device using adhesive layers. The adhesives can be deposited either on the metallic outer layers or on the plastic core of the composite or as adhesive foils between the core and the outer layers prior to the lamination step. The laminating device can be a device with rotating, heated pressure elements in the form of caterpillar tracks or steel strips that join ~he materials as they rotate applying pressure and heat to the same, or it can be a press with heated pressure plates.
~ \
8~
~6-373 An ar]vantageous version of the composite panel accorcling to the invention is illustrated schematically in the drawing. This shows in cross-section a composite pane] 1 having a foamed core 2 with uniformly distributed gas pores S and, on both sides of the core 5, metal outer layers 3 and 4 which are bonded to the core layer with the aid of relatively thin adhesive layers 6.
The core 2 of the composite panel 1 comprises a mixture of hard polyvinylchloride and post-chlorinated polyvinylchloride to which smoke and combustion suppressing inorganic fillers have been added. The gas pores 5 are created by the addition of a foaming agent to the polyvinylchloride mixture. As can be seen from the drawing the gas pores are always below the surface of the core layer 2 and produce therefore no recesses in the surface.
Claims (24)
1. Composite panel that is difficult to combust, produces little smoke and can be shaped at room temperature, which comprises: a thermoplastic core layer comprising a post-chlorinated polyvinyl-chloride containing inorganic filler; metal outer layers joined to said core layer; and adhesive layers between said core layer and each of said metal layers comprising two adhesive layers bonded to each other.
2. Composite panel that is difficult to combust, produces little smoke and can be shaped at room temperature, which comprises: a thermoplastic core layer comprising a mixture of hard polyvinyl-chloride and post-chlorinated polyvinylchloride containing inorganic filler; metal outer layers joined to said core layer; adhesive layers between said core layer and each of said metal layers with the layer of the adhesive on the side towards each outer layer comprising a thermoplastic material bonding well to the outer layer, and the layer of adhesive on the side towards the core layer compris-ing a thermoplastic material bonding well to the core layer, and at least one of the layers of adhesive is made flame retardant, using a flame retardant sub-stance for thermoplastics comprising a material selected from the group consisting of halogenated paraffins, antimony oxide and mixtures thereof.
3. Composite panel according to claim 1 wherein the core layer is foamed and includes finely divided gas pores therein, with the finely divided gas pores situated under the surface of said core layer.
4. Composite panel according to claim 1 wherein the metal layers are selected from the group consisting of aluminum, an aluminum alloy, steel and mixtures thereof.
5. Composite panel according to claim 1 wherein at least one layer of the adhesive layers exhibits combustion and smoke inhibiting properties.
6. Composite panel according to claim 2 wherein the plastic of the core layer contains between 30 and 95% of post-chlorinated polyvinylchloride and the post-chlorinated polyvinylchloride has a chlorine content of 63-72%.
7. Composite panel according to claim 6 wherein the plastic of the core layer contains between 70 and 95% of post-chlorinated polyvinylchloride and the post-chlorinated polyvinylchloride has a chlorine content of 65-69%.
8. Composite panel according to claim 1 wherein the inorganic filler comprises in powder form from 1 to 50% of a material selected from the group consisting of metal oxide, a metal hydroxide, a metal carbonate, a metal phosphate and mixtures thereof.
9. Composite panel according to claim 8 wherein said filler is selected from the group consisting of Sb2O3, MoO3, Fe2O3, Cn2O, CuO, NiO, ZnO, MgO, Al(OH)3, CaCO3, MgCO3, 27nO . 3 B2O3 .
3.5 H2O, and mixtures thereof.
3.5 H2O, and mixtures thereof.
10. Composite panel according to claim 8 wherein said filler has a grain size of 0.2-10 um, and the concentration of inorganic filler in the core layer is 3-10%.
11. Composite panel according to claim 8 wherein the particles of inorganic filler material are, with respect to the weight of the filler material, coated with 2% stearic acid.
12. Composite panel according to claim l wherein the core layer has a density of 0.2-1.8 g/cm3, and a thickness of 0.1-2 mm, and the outer layers have a thickness of 0.1-2 mm.
13. Composite panel according to claim 1, wherein the layer of the adhesive on the side towards the outer layer is of a thermoplastic material bonding well to the outer layer, and the layer of adhesive on the side towards the core layer is of a thermoplastic material bonding well to the core layer, and at least one of the layers of adhesive is made flame retardant, using a flame retardant sub-stance for thermoplastics comprising a material selected from the group consisting of halogenated paraffins, antimony oxides and mixtures thereof.
14. Composite panel according to claim 2, wherein the metal layers are selected from the group consisting of aluminum, an aluminum alloy, steel mixtures thereof.
15. Composite panel according to claim 2, wherein the inorganic filler comprises in powder form from 1 to 50% of a material selected from the group consisting of metal oxide, a metal hydroxide, a metal carbonate, a metal phosphate and mixtures thereof.
16. Composite panel according to claim 2, wherein said filler is selected from the group consisting of Sb2O3, MoCO3, Fe2O3, Cn2O, CuO, NiO, ZnO, Al(OH)3, CaCO3, MgCO3, 2ZnO.3B2O33.5 H2O and mixtures thereof.
17. Composite panel according to claim 1, wherein said filler has a grain size of 0.2-10 µm, and the concentration of inorganic filler in the core layer is 3-10%.
18. Composite panel according to claim 2, wherein the particles of inorganic filler material are, with respect to the weight of the filler mate-rial, coated with 2% stearic acid.
19. Composite panel according to claim 2, wherein the core layer has a density of 0.2-1.8g/cm3, and a thickness of 0.1-2 mm, and the outer layers have a thickness of 0.1-2 mm.
20. Composite panel according to claim 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 or 19, wherein the core layer is foamed and includes finely divided gas pores therein, with the finely divided gas pores situated under the surface of said core layer.
21. Process for manufacturing a composite panel that is difficult to combust, produces little smoke and can be shaped at room temperatures, which com-prises: preparing a thermoplastic core layer by extrusion using an extrusion tool, said layer com-prising a post-chlorinated polyvinylchloride contain-ing inorganic fillers; depositing two adhesive layers on each side of said core layer in the form of thermoplastic adhesive films; superimposing two metal outer layers on said adhesive layers to form a composite; heating the composite, and bonding together all layers by the application of pressure and heat.
22. Process according to claim 21, wherein the adhesive and outer layers are pre-heated.
23. Process according to claim 21 or 22, wherein said core layer is a foamed core layer.
24. Process according to claim 23, wherein said foamed core layer is subjected to intensive cooling and smoothing as it leaves the extrusion tool in order to form a pore-free surface.
#21/03/16/1990
#21/03/16/1990
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000528197A CA1279807C (en) | 1987-01-26 | 1987-01-26 | Composite panel that is difficult to combust and produces little smoke, and process for manufacturing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000528197A CA1279807C (en) | 1987-01-26 | 1987-01-26 | Composite panel that is difficult to combust and produces little smoke, and process for manufacturing same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1279807C true CA1279807C (en) | 1991-02-05 |
Family
ID=4134824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000528197A Expired - Fee Related CA1279807C (en) | 1987-01-26 | 1987-01-26 | Composite panel that is difficult to combust and produces little smoke, and process for manufacturing same |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1279807C (en) |
-
1987
- 1987-01-26 CA CA000528197A patent/CA1279807C/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4751137A (en) | Composite panel that is difficult to combust and produces little smoke, and process for manufacturing same | |
| US5968615A (en) | Seal for construction element | |
| CN111267452B (en) | Continuous honeycomb core material, honeycomb core sandwich composite plate and preparation method and equipment thereof | |
| US4724186A (en) | Weatherable three layer films | |
| US4680234A (en) | Weatherable coextruded flexible films and laminated structure | |
| CN101148936A (en) | Metal composite plate with fireproof interlayer and manufacturing method thereof | |
| JP3273095B2 (en) | Composite panel having two outer layers and a core | |
| CA2231397C (en) | An architectural material and a process of production thereof | |
| KR100258490B1 (en) | Coated metal plate with easily controlled gloss and reduced heat blocking during lamination and a method of preparation thereof | |
| CA1279807C (en) | Composite panel that is difficult to combust and produces little smoke, and process for manufacturing same | |
| US5356583A (en) | Method of making a modified burn characteristic saranex film | |
| BE1002450A3 (en) | COMPOUND MATERIAL COMPRISING ALUMINIUM AND FIBER MATS AND METHOD FOR THEIR Manufacturing. | |
| CA1156135A (en) | Flame resistant composite panel and process for its manufacture | |
| EP0780224A2 (en) | Insulating layers for fire resistant spaces | |
| US11312109B2 (en) | Composite panel having noncombustible polymer matrix core | |
| JPH06123141A (en) | Fireproofing panel | |
| JPH0929877A (en) | Foamed laminated sheet for interior material for automobile | |
| WO2008144169A2 (en) | Faced fiber insulation batt and method of making same | |
| KR101091085B1 (en) | Laminating co-extrusion dispersion-proof film | |
| KR102440781B1 (en) | Vibration damping steel sheet of constrain type with foam structure and preparation method thereof | |
| JPH10138340A (en) | Manufacture of embossed thermoplastic resin sheet | |
| JP2004358772A (en) | Flame retardant laminate | |
| CN116446606A (en) | Production and processing method of fireproof aluminum-plastic plate | |
| JP3128359B2 (en) | Fiber composite | |
| JP2530830B2 (en) | Stretch-molded product of laminate and method for producing the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |