JP6854418B2 - Interior panel - Google Patents

Description

The present invention relates to an interior panel constituting a ceiling, a wall, or the like of a building.

Conventionally, interior panels such as ceiling panels used for suspended ceilings are made of rock wool, fiberglass, foam, etc. to reduce the weight.
For example, Patent Document 1 below discloses a heat insulating panel made of a flame-retardant urethane foam.

Japanese Unexamined Patent Publication No. 2016-70058

However, although the ceiling panel made of the heat insulating panel as described above is lightweight, it tends to bend so that the central portion hangs down due to its own weight in the constructed state, and further improvement is desired.

The present invention has been made in view of the above circumstances, and provides an interior panel capable of improving rigidity while reducing weight.

In order to achieve the above object, the interior panel according to the present invention is provided on the foamed resin layer, the flame-retardant sheet provided on the indoor side of the foamed resin layer, and the interior base side of the foamed resin layer. The foamed resin layer includes a resin main component and a glass fiber reinforced resin layer having the same resin main component , and the glass fiber reinforced resin layer is formed on a glass fiber sheet constituting the glass fiber reinforced resin layer. the resin composition constituting the foamed resin layer is formed by impregnating the glass fiber sheet, characterized in glass cloth der Rukoto.
Further, in order to achieve the above object, the interior panel according to the present invention is provided on the indoor side of the foamed resin layer and the foamed resin layer, and the resin main component and the resin main component of the foamed resin layer are the same. A glass fiber reinforced resin layer, a flame-retardant sheet provided on the indoor side of the glass fiber reinforced resin layer, and a resin main component and a resin main component of the foamed resin layer provided on the interior base side of the foamed resin layer. The glass fiber reinforced resin layer having the same components and the exudation suppressing sheet provided on the interior base side of the glass fiber reinforced resin layer are provided, and the glass fiber reinforced resin layer on the indoor side is the glass. The indoor glass fiber sheet constituting the fiber-reinforced resin layer is formed by impregnating the resin composition constituting the foamed resin layer in a state where the flame-retardant sheet is laminated and integrated to form a composite sheet. The flame-retardant sheet is laminated and integrated with the foamed resin layer by being at least partially adhered to the resin composition that has passed through the glass fiber sheet on the indoor side, and the glass fiber reinforced resin layer on the interior base side. Is impregnated with the resin composition constituting the foamed resin layer in a state where the exudation suppressing sheet is laminated and integrated into a composite sheet on the glass fiber sheet on the interior base side constituting the glass fiber reinforced resin layer. The resin composition is formed, and at least partially adhered to the resin composition that has passed through the glass fiber sheet on the interior base side, and the exudation suppressing sheet is laminated and integrated with the foamed resin layer.

The interior panel according to the present invention has the above-described configuration, so that the rigidity can be improved while reducing the weight.

(A) to (c) schematically show an example of an interior panel according to an embodiment of the present invention, (a) is a schematic plan view, and (b) is XX in FIG. 2 (a). A schematic vertical cross-sectional view of a partial break corresponding to a line arrow, (c) is a partial vertical cross-sectional view corresponding to a YY line arrow in FIG. 2 (a). (A) is a partially broken schematic plan view schematically showing a state in which the interior panel is constructed, and (b) is a partially broken schematic vertical sectional view of the interior panel. (A) to (d) are partial fracture schematic vertical sectional views schematically showing an example of an interior panel according to another embodiment of the present invention. (A) and (b) are partial fracture schematic vertical sectional views schematically showing an example of an interior panel according to still another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In each of the following embodiments, directions such as the vertical direction will be described with reference to a state in which a ceiling panel is constructed as an example of the interior panel according to each embodiment.
1 and 2 are diagrams schematically showing an example of an interior panel according to the first embodiment.

The interior panel according to the present embodiment constitutes the ceiling panel 1, and is provided on the foamed resin layer 10 and the indoor side of the foamed resin layer 10 as shown in FIGS. 1 (b) and 2 (b). A flame-retardant sheet 12 and a glass fiber reinforced resin layer 14 provided on the interior base (ceiling base) 6 side of the foamed resin layer 10 are provided.
The ceiling base 6 to which the ceiling panel 1 is fixed may be a wooden ceiling base or a steel ceiling base. Further, the ceiling base 6 may be a so-called light ceiling base using a light iron material. In the illustrated example, an example is shown in which the ceiling base 6 is a so-called suspended ceiling in which the field edge 8 is suspended from a hanging member 7 such as a hanging tree or a hanging bolt. Good.
Further, the ceiling panel 1 may be constructed as the ceiling of a relatively small building such as a residence or an office, and may be used in various relatively large buildings such as a gymnasium, a hall, a shopping mall, a factory, or a school. It may be constructed as a ceiling.
Further, the ceiling panel 1 may have a mass of 2.0 kg or less per ^{unit area (1 m 2).} Further, the mass of the ceiling panel 1 may be set so that the mass of the entire ceiling system including the ceiling base 6 made of the light ceiling base as described above is 2.0 kg / m ^{2 or less.} The interior panel according to the present embodiment is not limited to the one that constitutes the ceiling panel 1, and may be the one that constitutes the wall panel. In this case, the wall base such as studs and studs may be grasped as the interior base.

Further, the ceiling panel 1 has a substantially rectangular shape in a plan view (viewed in the thickness direction). The ceiling panel 1 may have a substantially square shape in a plan view, or may have a substantially rectangular shape. The size of the ceiling panel 1 in a plan view may be an appropriate size from the viewpoint of handleability, workability, etc. For example, the length of one side may be 0.3 m or more. It may be 2.0 m or less. Further, in the ceiling panel 1 having a substantially rectangular shape, the length of the short side may be 0.3 m or more and the length of the long side may be 2.0 m or less. Further, in the ceiling panel 1 having a substantially square shape, the length of one side may be 0.6 m or more and 1.5 m or less, or about 0.9 m to 1.2 m. .. The thickness of the ceiling panel 1 (thickness of the central portion 5 described later) may be, for example, about 2.5 mm to 15.0 mm, preferably about 3.0 mm to 15.0 mm, although it depends on the layer structure and the like. It may be about 12.0 mm, more preferably about 3.0 mm to 6.0 mm.

The flame-retardant sheet 12 may have an appropriate configuration so that the ceiling panel 1 satisfies the technical standards for performance required for non-combustible materials and the like specified in the Building Standards Act. For example, the ceiling panel 1 may be configured to satisfy the standard of "flame-retardant material" in the technical standard, and preferably may be configured to satisfy the standard of "quasi-non-combustible material". More preferably, it may be configured to meet the criteria for "non-combustible material". The flame-retardant sheet 12 may be, for example, a foil-shaped aluminum sheet in the form of a thin sheet. The thickness of the aluminum sheet constituting the flame-retardant sheet 12 may be about 5 μm to 50 μm, preferably about 7 μm to 40 μm, and more preferably about 10 μm to 30 μm.

In the present embodiment, the flame-retardant sheet 12 is laminated and integrated with the foamed resin layer 10 by the resin composition constituting the foamed resin layer 10 described later. That is, the flame-retardant sheet 12 is laminated and integrated with the foamed resin layer 10 by the self-adhesiveness of the resin composition constituting the foamed resin layer 10 without using a separate adhesive or the like. With such a configuration, wrinkles and the like are less likely to be formed and the production efficiency can be improved as compared with the case where the flame-retardant sheet 12 is laminated on the foamed resin layer 10 via an adhesive or the like. Instead of such an embodiment, the flame-retardant sheet 12 and the foamed resin layer 10 may be laminated and integrated with an appropriate adhesive or the like.
Further, the flame-retardant sheet 12 provided on the indoor side of the ceiling panel 1 is not limited to the one having the above-mentioned configuration, and other various configurations can be adopted. For example, a resin-impregnated glass fiber non-woven fabric plate containing a heat-absorbing metal hydroxide may be used.

Further, in the present embodiment, the ceiling panel 1 has a structure in which a glass fiber sheet 13 is further laminated on the indoor side of the flame-retardant sheet 12. The glass fiber sheet 13 is in the form of a thin sheet having a thickness of about 0.1 mm to 0.5 mm. As the glass fiber sheet 13 may also nonwoven glass fabric (glass paper) may be those having a basis weight is between 2 to 250 g / ^{m 2} approximately ^{20 g} / m, preferably, basis weight ^30g / ^{m 2 ~100g} / m 2 It may be a degree. Further, the glass fiber sheet 13 and the flame-retardant sheet 12 may be laminated and integrated with an appropriate adhesive or the like. The composite sheet including the glass fiber sheet 13 and the flame-retardant sheet 12 laminated and integrated in this way is laminated and integrated with the foamed resin layer 10 by the resin composition constituting the foamed resin layer 10 described later. But it may be. Further, the composite sheet including the glass fiber sheet 13 and the aluminum sheet constituting the flame-retardant sheet 12 may be grasped as the flame-retardant sheet. Further, the surface of the ceiling panel 1 facing the indoor side, that is, the surface of the glass fiber sheet 13 may be a decorative surface to which an appropriate surface decorative treatment such as printing or painting is applied. That is, the glass fiber sheet 13 may constitute the decorative layer. Alternatively, the surface of the ceiling panel 1 facing the indoor side may be used as a base surface to which an appropriate decorative sheet is attached. The decorative layer is not limited to the glass fiber sheet 13, and may be another sheet material that has been subjected to an appropriate surface decorative treatment such as printing or painting, or may be formed by printing, painting or the like. Further, the pigments, additives and the like contained in the paint used for printing the decorative layer are preferably inorganic from the viewpoint of ensuring flame retardancy.

The resin main component of the glass fiber reinforced resin layer 14 is the same as the resin main component of the foamed resin layer 10. The glass fiber sheet 14a constituting the glass fiber reinforced resin layer 14 (see FIG. 2 (b)), basis weight is the glass cloth ^{50g / m 2 ~300g / m 2} . Basis weight of the glass fiber sheet 14a is preferably ^may even ^{50g / m 2 ~150g / m 2} , more ^preferably, may be ^{50g / m 2 ~100g / m 2} . Such a glass fiber sheet 14a may be in the form of a thin sheet having a thickness of about 0.1 mm to 0.5 mm. Further, the glass fiber sheet 14a is preferably a glass fiber woven fabric, and may be, for example, a glass cloth which is a woven fabric such as a plain woven fabric or a entwined woven fabric woven by using glass roving for the warp and weft threads. By using a glass cloth, it is possible to prevent thermal deformation from occurring. The glass fiber sheet 14a is not limited to such a glass cloth, and may be a glass paper or a glass mat.

Further, in the present embodiment, the glass fiber reinforced resin layer 14 is formed by impregnating the glass fiber sheet 14a with the resin composition constituting the foamed resin layer 10. That is, the glass fiber reinforced resin layer 14 is integrally provided on a part of the foamed resin layer 10. With such a configuration, boundary peeling and the like can be made less likely to occur as compared with a separately prepared sheet constituting the glass fiber reinforced resin layer laminated on the foamed resin layer 10. Moreover, the manufacturing efficiency can be improved. The glass fiber reinforced resin layer 14 may be configured to contain air bubbles by foaming the resin composition. Further, in the glass fiber reinforced resin layer 14, for example, the glass fiber sheet 14a is arranged in an appropriate mold, frame material, or the like, and the resin composition constituting the foamed resin layer 10 is supplied (coated) to the glass fiber sheet 14a. It may be formed by impregnating the glass. Further, the ceiling panel 1 has a foamed resin layer 10 formed on one of a glass fiber sheet 14a arranged on the ceiling base 6 side and a flame-retardant sheet 12 (and a glass fiber sheet 13) arranged on the indoor side. The resin composition to be used may be supplied, and the other may be arranged and molded so as to cover the supplied resin composition. In this case, for example, continuous molding may be performed by a double belt press device, a press device provided with an endless track zone in which a plurality of foot plates are connected, or the like.

The foamed resin layer 10 occupies most of the ceiling panel 1. The thickness of the foamed resin layer 10 is preferably 80% to 99%, more preferably 85% to 95% of the thickness of the ceiling panel 1. The thickness of the foamed resin layer 10 may be, for example, about 2.3 mm to 14.8 mm, preferably about 2.5 mm to 11.5 mm, and more preferably about 2.5 mm to 5.5 mm. It may be a degree. Further, in the present embodiment, the resin composition constituting the foamed resin layer 10 is a foamed polyurethane resin having a foaming ratio of 10 to 30 times. With such a configuration, weight reduction can be achieved. Further, one or both of the flame-retardant sheets 12 and the glass fiber reinforced resin layer 14 on both sides of the foamed resin layer 10 in the thickness direction are formed of the foamed resin layer by the resin composition constituting the foamed resin layer 10 as described above. It can be laminated and integrated with 10 to improve the manufacturing efficiency. The expansion ratio of the resin composition constituting the foamed resin layer 10 is preferably about 15 to 25 times.
Further, in the present embodiment, the resin composition constituting the foamed resin layer 10 is a flame-retardant polyurethane resin composition. With such a configuration, the flame retardancy (non-flammability) can be further improved in combination with the above-mentioned foaming ratio. That is, since the amount of the organic material contained in the foamed resin layer 10 is relatively small, the total calorific value can be reduced. Such a flame-retardant polyurethane resin composition may be configured to include a polyisocyanate compound, a polyol compound, a catalyst, a foaming agent, a defoaming agent, and an additive. Further, such a flame-retardant polyurethane resin composition may further contain a flame retardant, a filler, and an inorganic filler. Examples of the resin constituting the foamed resin layer 10 include polystyrene resin, polyethylene resin, polypropylene resin, phenol resin, epoxy resin and the like, in addition to polyurethane resin.

Further, in the present embodiment, as shown in FIG. 1B, the ceiling panel 1 has a higher density of the foamed resin layer 10 at both ends 2 and 2 in the first direction than the central portion 5 which is another portion. It is configured to be provided with fixing portions 15 and 15 having a small thickness. With such a configuration, fasteners 9 such as screws and nails can be fastened to the ceiling base 6 via these fixing portions 15 and 15. Further, since the foamed resin layer 10 of the fixing portions 15 and 15 has a higher density and a smaller thickness than the central portion 5, the head portion 9a of the stopper 9 is less likely to be buried excessively. , Can be fixed looking good. Further, since the ceiling panel 1 can be fixed by the stopper 9 in this way, the workability can be improved as compared with the case where the work needs to be performed by using a joining member such as a joiner.

These fixing portions 15 and 15 are formed so that the both ends 11 and 11 in the first direction of the foamed resin layer 10 are smaller in thickness than the other portions and thinner than the other portions. In the first-direction end portions 11 and 11 of the foamed resin layer 10, for example, the die-plane dimensions (clearance) of the portions corresponding to the first-direction end portions 11 and 11 correspond to other portions (central side portions). It may be formed by an appropriate mold or the like that is smaller than the inter-mold size (clearance) of the portion. That is, the foaming of both ends 11 and 11 in the first direction may be suppressed as compared with other portions, and as a result, both ends 11 and 11 in the first direction may have a high density. Further, the foamed resin layer 10 (or the ceiling panel 1 including the glass fiber sheet 14 and the flame-retardant sheet 12 (and the glass fiber sheet 13)) is elongated in the second direction orthogonal to the first direction. It may be formed by appropriately cutting or the like formed by continuous molding. For example, it may be continuously formed by a double belt press device, a press device provided with an endless track zone in which a plurality of foot plates are connected, or the like. Further, the both ends 11 and 11 in the first direction of the foamed resin layer 10 may be formed by heating and compressing after foam molding instead of the above-described embodiment.

Further, as shown in FIG. 1B, the thickness dimensions of the fixing portions 15 and 15 are made larger than the dimensions of the head portion 9a of the stopper 9 along the stopper axial direction. The thickness dimensions of the fixing portions 15 and 15 may be about 1/5 to 1/2 of the thickness dimension of the central portion 5 of the ceiling panel 1, and may be, for example, about 1.0 mm to 7.0 mm. , Preferably, it may be 1.5 mm or more, and may be 3.0 mm or less.
Further, the width dimension of the fixing portions 15 and 15 along the first direction may be an appropriate dimension so that the fixing portions 15 and 15 can be fixed to the ceiling base 6 by the stopper 9. The width dimension of the fixing portions 15 and 15 along the first direction may be ½ or more of the width dimension along the same direction of the field edge 8 constituting the ceiling base 6, and in the illustrated example, the field edge 8 may be set. An example is shown in which the width dimension of is about 1/2.

In the present embodiment, as shown in FIG. 1A, the fixing portions 15 and 15 extend in the second direction orthogonal to the first direction, and both ends 2 and 2 in the first direction of the ceiling panel 1 are extended. The configuration is provided throughout the above. With such a configuration, the fastener 9 can be fixed at an arbitrary position on both ends 2 and 2 in the first direction, and the fixing portions 15 and 15 are provided at intervals in the second direction. In comparison, workability can be improved.
Further, in these fixing portions 15 and 15, the indoor side surface 2a facing the indoor side is substantially flush with the indoor side surface 5a of the central portion 5, and the ceiling base 6 side is recessed from the central portion 5. That is, as shown in FIGS. 1A and 1B, both ends 2 and 2 in the first direction of the ceiling panel 1 are directed to one side in the thickness direction and the outside in the first direction, which are the ceiling base 6 sides. Recessed steps 16 and 16 to be opened are provided over the entire ends 2 and 2 in the first direction. With such a configuration, the appearance of the indoor side can be improved and the ceiling height can be increased as compared with the case where the recess is provided on the indoor side. In the illustrated example, the step wall surface facing outward in the first direction for partitioning the concave steps 16 and 16 is moved from the surface facing the ceiling base 6 side of the central portion 5 to the ceiling base 6 side for partitioning the concave steps 16 and 16. An example is shown in which an inclined surface is inclined so as to descend toward the bottom surface of the step facing the surface. The glass fiber reinforced resin layer 14 is provided along the step wall surface and the step bottom surface of the concave step portions 16 and 16.

Further, in the present embodiment, the ceiling panel 1 constitutes a connecting portion that is temporarily held and connected to the adjacent ceiling panels 1 at both ends 3 and 4 in the second direction orthogonal to the first direction. And the female body portion 18 is provided. The male fruit portion 17 is provided at the first end portion 3 in the second direction, and the female fruit portion 18 is provided at the second end portion 4 in the second direction.
As shown in FIGS. 1 (a) and 1 (c), the male body portion 17 is provided so as to project outward from the first end portion 3 in the second direction toward the outside in the second direction. As shown in FIG. 1A, the male body portion 17 is not provided over the entire first direction of the first end portion 3 in the second direction, but is provided at the central side portion in the first direction. There is. That is, the male body portion 17 is provided so as not to reach both end portions 2 and 2 in the first direction in which the fixing portions 15 and 15 are provided as described above. Further, as shown in FIG. 1 (c), the male body portion 17 is provided at an intermediate portion in the thickness direction of the ceiling panel 1 (in the example, a substantially central portion in the thickness direction).

As shown in FIGS. 1 (c) and 2 (a), the female body portion 18 is configured to be fitted with the male body portion 17 of the adjacent ceiling panels 1. The female body portion 18 is provided so as to open toward the outside in the second direction at the end surface of the second end portion 4 in the second direction. Further, as shown in FIG. 1A, the female portion 18 is not provided over the entire first direction of the second end portion 4 in the second direction, as is the case with the male portion 17. It is provided in the central part in one direction. That is, the female body portion 18 is provided so as not to reach both end portions 2 and 2 in the first direction in which the fixing portions 15 and 15 are provided as described above. Further, as shown in FIG. 1 (c), the female body portion 18 is provided at an intermediate portion in the thickness direction of the ceiling panel 1 (in the example, a substantially central portion in the thickness direction).

Further, these male and female parts 17 and female parts 18 are provided in the foamed resin layer 10 in the present embodiment. The male part 17 and the female part 18 may be formed when the foamed resin layer 10 (ceiling panel 1) is molded, or may be formed by cutting, heat compression, or the like after molding. Further, the connecting portions to be temporarily held and connected to the adjacent ceiling panels 1 are not limited to the male and female portions 17 as described above, and the recesses and the female actual portions provided on both sides in a female shape are included. It may be formed by the above, or it may be a concave step portion formed in a phase-like shape.
Further, in the present embodiment, the ceiling panel 1 has chamfered portions 19, 19, 19, at the indoor side edges of the four peripheral ends (first direction both ends 2, 2 and second direction both ends 3, 4). 19 is provided. With such a configuration, it is possible to make the step between the indoor side surfaces of the adjacent ceiling panels 1 and 1 inconspicuous. In the illustrated example, these chamfered portions 19, 19, 19, 19 are shown as C chamfered inclined surfaces, but may be R chamfered curved surfaces. Further, these chamfered portions 19, 19, 19, 19 may be formed when the ceiling panel 1 is molded, or may be formed by cutting, heat compression, or the like after molding.

In the ceiling panel 1 having the above configuration, as shown in FIGS. 1 (b), 1 (c) and 2 (a), the fixing portions 15 and 15 of both end portions 2 and 2 in the first direction are ceilinged by the stopper 9. It is fixed to the field edge 8 of the base 6. At this time, one of the male and female portions 18 provided at one end of the second-direction both ends 3 and 4 of the ceiling panel 1 has already been constructed in the second direction. The ceiling panel 1 adjacent to the ceiling panel 1 may be engaged with the other of the male and female portions 17 and temporarily held.
In the illustrated example, the head 9a of the stopper 9 is provided so that the surface of the head 9a of the countersunk screw 9 facing the indoor side is substantially the same as the indoor side surfaces 2a and 2a of the fixing portions 15 and 15. Is embedded in the fixing portions 15 and 15, and the stopper 9 is fixed (screwed or driven in) to the field edge 8.

The ceiling panel 1 constituting the interior panel according to the present embodiment has the above-described configuration, so that the rigidity can be improved while reducing the weight.
That is, since the ceiling panel 1 is provided with the foamed resin layer 10, the weight can be reduced as compared with the wood-based board or the gypsum board. Further, since the flame-retardant sheet 12 is provided on the indoor side of the foamed resin layer 10, the flame-retardant property can be improved. That is, when a flame is generated on the indoor side, the flame-retardant sheet 12 on the indoor side can delay the spread of fire to the foamed resin layer 10.
Further, the glass fiber reinforced resin layer 14 is provided on the ceiling base 6 side of the foamed resin layer 10. Therefore, the glass fiber reinforced resin layer 14 can serve as a reinforcing layer to improve bending rigidity and dimensional stability, and can suppress sagging after construction. That is, it is suitable as the ceiling panel 1 because it is possible to suppress sagging after construction while reducing the weight.

Further, in the present embodiment, since the resin main component of the glass fiber reinforced resin layer 14 is the same as the resin main component of the foamed resin layer 10, the compatibility in each layer is improved and boundary peeling and the like can be prevented from occurring. ..
Further, in the present embodiment, the glass fiber sheet 13 is laminated on the indoor side of the flame-retardant sheet 12. Therefore, flexural rigidity and dimensional stability can be further improved.
Further, in the present embodiment, the glass fiber sheet 14a constituting the glass fiber reinforced resin layer 14, having a basis weight as the glass cloth ^{50g / m 2 ~300g / m 2} , a flame-retardant sheet 12, the thickness 5μm~ The structure includes a 50 μm aluminum sheet. Therefore, it is possible to secure an appropriate flexural rigidity while reducing the weight, and it is possible to improve the flame retardancy.

Next, another embodiment according to the present invention will be described with reference to the drawings.
In each of the following embodiments, the differences from the embodiments described above will be mainly described, and the same components will be designated by the same reference numerals, and the description thereof will be omitted or briefly described.

FIG. 3A is a diagram schematically showing an example of the ceiling panel according to the second embodiment.
The ceiling panel 1A according to the present embodiment has a configuration in which a glass fiber reinforced resin layer 14A is provided on the indoor side (flame-retardant sheet 12 side) of the foamed resin layer 10A. That is, the foamed resin layer 10A is sandwiched between the glass fiber reinforced resin layers 14 and 14A forming the reinforcing layers on both sides in the thickness direction. The glass fiber reinforced resin layer 14A on the indoor side has the same resin main component and resin main component as the foamed resin layer 10A. The glass fiber reinforced resin layer 14A on the indoor side is formed by impregnating the glass fiber sheet 14a with the resin composition constituting the foamed resin layer 10A, similarly to the glass fiber reinforced resin layer 14 on the ceiling base 6 side. The glass fiber reinforced resin layer 14A on the indoor side may be configured to contain air bubbles by foaming the resin composition as described above. Further, the ceiling panel 1A has a structure in which a flame-retardant sheet 12 and a glass fiber sheet 13 are provided on the indoor side of the glass fiber reinforced resin layer 14A on the indoor side as described above.

The glass fiber reinforced resin layer 14A on the indoor side is made of glass in a state where the flame retardant sheet 12 (and the glass fiber sheet 13) is laminated and integrated with the glass fiber sheet 14a with an appropriate adhesive to form a composite sheet. The fiber sheet 14a may be formed by impregnating the resin composition constituting the foamed resin layer 10A. That is, the flame-retardant sheet 12 (and the glass fiber sheet 13) may be laminated and integrated with the foamed resin layer 10A by the resin composition constituting the glass fiber reinforced resin layer 14A. Further, in this case, the flame-retardant sheet 12 may be at least partially adhered to the resin composition that has passed through the glass fiber sheet 14a. That is, as described above, the resin composition constituting the foamed resin layer 10A is partially adhered to the flame-retardant sheet 12 so as to exude from the glass fiber sheet 14a having a small basis weight and a large number of gaps. It may be.
The ceiling panel 1A according to the present embodiment also has substantially the same effect as that of the first embodiment. Further, in the present embodiment, since the glass fiber reinforced resin layers 14 and 14A serving as reinforcing layers are provided on both sides of the foamed resin layer 10A in the thickness direction, the bending rigidity and the dimensional stability are more effectively improved. be able to. As a result, it is possible to more effectively suppress sagging after construction while reducing the weight, which makes the ceiling panel 1A more suitable. Further, since the glass fiber reinforced resin layer 14A including the glass fiber sheet 14a having good heat resistance is provided on the ceiling base 6 side of the flame retardant sheet 12, the calorific value of the glass fiber sheet 14a is small. In addition, the shape retention in the event of a fire can be improved. As a result, deformation of the flame-retardant sheet 12 in the event of a fire can be suppressed, and the effect of delaying the spread of fire on the foamed resin layer 10 by the flame-retardant sheet 12 can be more effectively exhibited. In particular, if the glass fiber sheet 14a is made of glass cloth as described above, deformation at the time of fire can be suppressed more effectively.

FIG. 3B is a diagram schematically showing an example of the ceiling panel according to the third embodiment.
The ceiling panel 1B according to the present embodiment has a configuration in which a glass fiber reinforced resin layer 14B formed separately from the foamed resin layer 10B is laminated and integrated on the ceiling base 6 side of the foamed resin layer 10B. .. The glass fiber reinforced resin layer 14B is in the form of a thin sheet, and is formed by curing the resin composition impregnated in the glass fiber sheet. The glass fiber reinforced resin layer 14B may be laminated on the foamed resin layer 10B with an adhesive or the like, or may be laminated and integrated with the resin composition constituting the foamed resin layer 10B. Also in the present embodiment, the resin main component of the glass fiber reinforced resin layer 14B is preferably the same as the resin main component of the foamed resin layer 10B, but may be different. In this case, as the resin main component of the glass fiber reinforced resin layer 14B, a polyurethane resin, a polystyrene resin, a polyethylene resin, a polypropylene resin, a phenol resin, an epoxy resin, or the like can be used alone or in combination of two or more.
The ceiling panel 1B according to the present embodiment also has substantially the same effect as that of the first embodiment.

FIG. 3C is a diagram schematically showing an example of the ceiling panel according to the fourth embodiment.
The ceiling panel 1C according to the present embodiment has glass fiber reinforced resin layers 14B formed separately from the foamed resin layer 10C on both sides (ceiling base 6 side and indoor side) in the thickness direction of the foamed resin layer 10C. The structure is such that 14C is laminated and integrated. The glass fiber reinforced resin layers 14B and 14C may be laminated on the foamed resin layer 10C with an adhesive or the like as in the third embodiment, and are laminated and integrated by the resin composition constituting the foamed resin layer 10C. It may be a plastic one. Further, the ceiling panel 1C has a configuration in which a flame-retardant sheet 12 and a glass fiber sheet 13 are provided on the indoor side of the glass fiber reinforced resin layer 14C on the indoor side, as in the second embodiment.
The ceiling panel 1C according to the present embodiment also has substantially the same effect as that of the second embodiment.

FIG. 3D is a diagram schematically showing an example of the ceiling panel according to the fifth embodiment.
The ceiling panel 1D according to the present embodiment has a configuration in which the exudation suppressing sheet 12A is provided on the ceiling base 6 side of the glass fiber reinforced resin layer 14 provided on the ceiling base 6 side of the foamed resin layer 10A. Further, the glass fiber sheet 14a constituting the glass fiber reinforced resin layer 14 of the ceiling base 6 side, basis weight is the glass cloth ^{50g / m 2 ~150g / m 2} . Further, also in the present embodiment, as in the first embodiment and the second embodiment, the glass fiber reinforced resin layer 14 on the ceiling base 6 side has a resin composition constituting the foamed resin layer 10A on the glass fiber sheet 14a. It is impregnated and formed. Further, in the present embodiment, the exudation suppressing sheet 12A is at least partially adhered to the resin composition that has passed through the glass fiber sheet 14a constituting the glass fiber reinforced resin layer 14 on the ceiling base 6 side.

The exudation suppressing sheet 12A may be a resin sheet or a metal sheet as long as it can suppress the exudation of the resin composition constituting the glass fiber reinforced resin layer 14. For example, the exudation suppressing sheet 12A may be an aluminum sheet similar to the flame-retardant sheet 12 described above, or a sheet thinner than the flame-retardant sheet 12. For example, the thickness of the exudation suppressing sheet 12A may be about 2/5 to 3/5 of the thickness of the flame-retardant sheet 12.
The glass fiber reinforced resin layer 14 on the ceiling base 6 side is formed into a composite sheet by laminating and integrating the exudation suppressing sheet 12A on the glass fiber sheet 14a with an appropriate adhesive, and the foamed resin layer is formed on the glass fiber sheet 14a. It may be formed by impregnating the resin composition constituting 10A. Further, when the glass fiber reinforced resin layer 14 is formed in this way, the resin composition exuded from the glass fiber sheet 14a may be partially adhered to the exudation suppressing sheet 12A. That is, the adhesive for laminating and integrating the exudation suppressing sheet 12A and the glass fiber sheet 14a is a glass fiber sheet so as to allow the resin composition constituting the glass fiber reinforced resin layer 14 to seep out from the glass fiber sheet 14a. It may be applied to 14a.
Further, in the present embodiment, the ceiling panel 1D is provided with the glass fiber reinforced resin layer 14A, the flame-retardant sheet 12, and the glass fiber sheet 13 on the indoor side of the foamed resin layer 10A as in the second embodiment. It is composed.

The ceiling panel 1D according to the present embodiment also has substantially the same effect as that of the second embodiment. Further, in the present embodiment, since the exudation suppressing sheet 12A is provided on the ceiling base 6 side, the sheet-like members (flame retardant sheet 12 and the exudation suppressing sheet 12A) are provided on both sides of the foamed resin layer 10A in the thickness direction. It will be provided, and flexural rigidity and dimensional stability can be improved more effectively. Also, since the basis weight of the glass fiber sheet 14a is set to ^{50g / m 2 ~150g / m 2} , it is possible to reduce the weight of the ceiling panel 1D. Further, if the grain size of the glass fiber sheet 14a is reduced in this way, the gaps are increased, and the resin composition constituting the glass fiber reinforced resin layer 14 exudes during molding, so that the glass fiber sheet 14a is a resin composition. It is possible that it will be buried in the layer. Since the glass fiber sheet 14a is laminated and integrated with the exudation suppressing sheet 12A as described above, the burial of the glass fiber sheet 14a during molding can be suppressed.

Further, in the present embodiment, since the exudation suppressing sheet 12A is at least partially adhered to the resin composition that has passed through the glass fiber sheet 14a, the exudation suppressing sheet 12A can be effectively suppressed from peeling. Further, if the exudation suppressing sheet 12A is made of a metal sheet, the flame retardancy can be improved, and the heat shielding property and the electromagnetic wave shielding property can be expected to be improved.
Further, in the present embodiment, the glass fiber reinforced resin layer 14 and the exudation suppressing sheet 12A are provided on the ceiling base 6 side of the foamed resin layer 10A, and the glass fiber reinforced resin layer 14A and the flame retardant sheet are provided on the indoor side of the foamed resin layer 10A. 12 is provided. Therefore, the glass fiber reinforced resin layers 14, 14A and the sheet-like members (flame-retardant sheet 12 and exudation suppressing sheet 12A) are provided on both sides of the foamed resin layer 10A in the thickness direction, thereby improving bending rigidity and dimensional stability. It can be improved more effectively. In addition, since the structure is almost symmetrical on the front and back, a warp suppressing effect can be expected.
Also in the ceiling panels 1, 1B and 1C described in the first embodiment, the third embodiment and the fourth embodiment described above, the exudation suppressing sheet 12A as described in the present embodiment is provided on the ceiling base 6 side. It may be provided.

FIG. 4A is a diagram schematically showing an example of the ceiling panel according to the sixth embodiment.
The ceiling panel 1E according to the present embodiment has the same layer structure as that of the fifth embodiment. That is, in the present embodiment, the ceiling panel 1E has a configuration in which the indoor side layer 20 including the glass fiber reinforced resin layer 14A, the flame retardant sheet 12 and the glass fiber sheet 13 is provided on the indoor side of the foamed resin layer 10D. ing. Further, the ceiling panel 1E has a structure in which a glass fiber reinforced resin layer 14 and a ceiling base side layer 24 including a seepage suppression sheet 12A are provided on the ceiling base 6 side of the foamed resin layer 10D. Further, in the present embodiment, the fixing portions 15 as described above are not provided at both ends of the ceiling panel 1E in the first direction. Further, although not shown, the ceiling panel 1E is configured so that the male and female portions 17 as described above are not provided at both ends in the second direction. In the cross-sectional views of FIGS. 1 to 3, each layer provided on the indoor side and the ceiling base 6 side of the foamed resin layer is shown with a relatively large thickness, but in FIG. 4, the chamber is shown. Each layer of the inner layer 20 and the ceiling base side layer 24 is shown as one layer for simplification.

Further, in the present embodiment, the flame-retardant sheet 12 and the glass fiber sheet 13 are provided on the end surface of at least one side end portion of the four peripheral side ends of the ceiling panel 1E. With such a configuration, as shown in FIG. 4A, even if a fire breaks out on the indoor side in a state where the end faces of the adjacent ceiling panels 1E and 1E are butted against each other, foaming occurs. Combustion from the end face can be delayed as compared with the case where the resin layer is exposed on the end face.
Preferably, the flame-retardant sheet 12 and the glass fiber sheet 13 may be provided on the end faces of both side ends of the ceiling panel 1E, and more preferably, the flame-retardant sheet 12 and the glass fiber may be provided on the end faces of the four peripheral end portions. A sheet 13 may be provided.
Further, in the present embodiment, in addition to the end surface of the ceiling panel 1E, a flame-retardant sheet 12 and a glass fiber sheet 13 are provided on the side surface (back surface) of the ceiling base 6 at the side end portion. With such a configuration, the flame retardancy and rigidity of the side end portion can be improved. Further, if the stopper 9 is fastened to the portion where the flame-retardant sheet 12 and the glass fiber sheet 13 are provided on the back surface side in this way, the stopper holding force can be improved.

Further, in the present embodiment, the end face layer 22 including the glass fiber sheet 13, the flame-retardant sheet 12, and the glass fiber reinforced resin layer 14A is provided on the end face of the ceiling panel 1E. With such a configuration, the rigidity of the end face can be improved by the end face layer 22. Further, the back surface of the side end portion of the ceiling panel 1E is provided with the end back surface layer 23 including the glass fiber sheet 13, the flame-retardant sheet 12, and the glass fiber reinforced resin layer 14A. With such a configuration, the flame retardancy and rigidity of the side end portion can be further improved, and the stopper holding force can be more effectively improved.
Further, in the illustrated example, an example is shown in which the end back surface layer 23 is further extended so as to cover the side end side portion of the ceiling base side layer 24. That is, a portion in which the ceiling base side layer 24 and the end back surface layer 23 are overlapped is provided on a part of the back surface of the side end portion. In this way, the fastener 9 may be fixed to the portion where the ceiling base side layer 24 and the end back surface layer 23 are overlapped. It should be noted that a concave step portion for receiving the end back surface layer 23 may be provided on the back surface of the side end portion so that there is no step between the overlapped portion and the other portion of the ceiling base side layer 24. .. Such a concave step portion may be formed by cutting by cutting or the like, or may be formed by compression.

Further, in the present embodiment, the chamfered portion 19A of the ceiling panel 1E is provided with the chamfered surface layer 21 including the glass fiber sheet 13, the flame-retardant sheet 12, and the glass fiber reinforced resin layer 14A.
The chamfered surface layer 21, the end surface layer 22, and the end back surface layer 23 are provided in a series on the indoor side layer 20 including the glass fiber sheet 13, the flame-retardant sheet 12, and the glass fiber reinforced resin layer 14A. With such a configuration, the appearance can be improved because no seams are formed as compared with, for example, a case in which an edge sheet is attached to cover the end face or the like. In the present embodiment, the chamfered surface layer 21, the end surface layer 22, and the end back surface layer 23 are sided so that the indoor side layer 20 (or the glass fiber sheet 13 and the flame-retardant sheet 12) is present on the groove bottom side. It is provided by being bent at the portions of the bent grooves 25 and 26 provided on the back surface side of the end portion. Although detailed description of such bent grooves 25 and 26 is omitted, the chamfered portion 19A and the end back surface layer 23 are formed, and the indoor side layer 20 (or the glass fiber sheet 13 and the difficulty) are formed. The foamed resin layer 10D may be cut into an appropriate shape so that at least the flammable sheet 12) remains, and the ceiling base side layer 24 may be cut to provide a plurality of layers. The bent grooves 25 and 26 are not limited to those provided by cutting out the foamed resin layer 10D or the like, and may be formed by pressing an appropriate groove forming mold from the back surface side. That is, these bent grooves 25 and 26 may be formed by compressing (heating and compressing) the foamed resin layer 10D so as to crush the bubbles of the foamed resin layer 10D. In this case, the groove walls of the bent grooves 25 and 26 may be formed of the ceiling base side layer 24 instead of the one made of the foamed resin layer 10D as shown in the figure. Further, the end back surface layer 23 may also be formed by pressing the foamed resin layer 10D on the back surface side with an appropriate end forming mold.

Further, the inner surface of the bent grooves 25 and 26 and the back surface of the end back surface layer 23 may be appropriately applied with an adhesive and bent.
Further, when the chamfered surface layer 21, the end surface layer 22 and the end back surface layer 23 are provided at the four peripheral side ends of the ceiling panel 1E, each layer and the foamed resin layer 10D are less likely to interfere with each other at the corners when bent. As described above, the corner portion in the unfolded state may be cut into an appropriate shape.
The ceiling panel 1E according to the present embodiment also exhibits substantially the same effect as the fifth embodiment in addition to the above-mentioned effect. The end face layer 22 and the chamfered surface layer 21 may be provided, and the end back surface layer 23 may not be provided. Further, when the chamfered portion 19A is not provided, the chamfered surface layer 21 may not be provided. In this case, a configuration in which one bending groove may be provided may be provided.

FIG. 4B is a diagram schematically showing an example of the ceiling panel according to the seventh embodiment.
The ceiling panel 1F according to the present embodiment has the same covering configurations as those of the sixth embodiment on the front surface, the side end surface, and the back surface. That is, also in this embodiment, the ceiling panel 1F also includes a chamfered portion 19A, a chamfered portion including a glass fiber sheet 13, a flame-retardant sheet 12, and a glass fiber reinforced resin layer 14A on the end face and the back surface of the side end portions, respectively. The surface layer 21, the end face layer 22, and the end back surface layer 23 are provided. In the present embodiment, the end face and the back surface of the side end portion are formed in a series by the extension portion where the indoor side layer 20 extends outward from the end face of the foamed resin layer 10E without providing the bent grooves 25 and 26. It has a structure covered with. Further, the back surface of the extension portion where the indoor side layer 20 is extended may be appropriately coated with an adhesive and bent to cover the end surface and the back surface of the side end portion in a series.
Further, in the present embodiment, the front surface, the end surface, and the back surface of the side end portion covered by the extending portion are formed on the side end portion of the ceiling panel 1F, and the reinforcing member 27 having higher rigidity than the foamed resin layer 10E is foamed. The structure is provided adjacent to the resin layer 10E. With such a configuration, the rigidity of the side end portion can be improved. Further, the linearity of the boundary portion (ridge line) between the surface and the end face can be improved as compared with the case where the side end portion of the foamed resin layer 10E is covered without providing such a reinforcing member 27.

The reinforcing member 27 has a long rod shape along the side end portion of the ceiling panel 1F. The reinforcing member 27 may be provided in a frame shape along the four peripheral end portions of the ceiling panel 1F. Further, in the present embodiment, the reinforcing member 27 is provided with a chamfered portion so that the chamfered portion 19A is formed on the surface side edge portion of the ceiling panel 1F.
The reinforcing member 27 is preferably formed of a flame-retardant material, and may be formed of, for example, metal, gypsum, calcium silicate, or the like. Further, the reinforcing member 27 may be configured to include a magnet as a whole or a part of the reinforcing member 27. Such magnets may be provided so that the magnets provided on the adjacent ceiling panels 1F and 1F are attracted to each other, or may be provided so as to be attracted to the ceiling base 6. In addition, instead of or in addition to such an embodiment, a sheet-shaped magnet may be provided on the back surface of the side end portion of the ceiling panel 1F in an embedded or attached shape.

Further, the reinforcing member 27 is provided so that the surface of the indoor side layer 20 covered on the indoor side surface thereof and the surface of the indoor side layer 20 provided on the indoor side of the foamed resin layer 10E are substantially flush with each other. ing. Further, the surface of the reinforcing member 27 facing the ceiling base 6 side is substantially flush with the surface of the ceiling base side layer 24 provided on the ceiling base 6 side of the foamed resin layer 10E and facing the ceiling base 6. It is provided. Further, also in the present embodiment, the end back surface layer 23 is provided so as to cover the side end side portion of the ceiling base side layer 24 in addition to the surface of the reinforcing member 27 facing the ceiling base 6 side. .. Further, in the figure example, an example in which the stopper 9 is fastened to the portion where the end back surface layer 23 is overlapped with the ceiling base side layer 24 in this way is shown, but the portion where the reinforcing member 27 is provided is shown. It may be a mode in which the stopper 9 is fastened. In this example and each example, an example in which the stopper 9 is used as a screw is shown, but the screw is not limited to the screw, and may be a nail, a staple, or the like. Further, in the figure example, although the reinforcing member 27 is shown as a solid shape, it may be a hollow tubular shape.
The ceiling panel 1F according to the present embodiment also exhibits substantially the same effect as the sixth embodiment in addition to the above-mentioned effect.

The reinforcing member 27 is not limited to a long rod shape provided with a chamfered portion as described above, but is a thin flat plate shape arranged along the thickness direction of the end face layer 22. It may be the one that is said to be. Further, in the present embodiment, an example in which the reinforcing member 27 is embedded in the side end portion of the ceiling panel 1F is shown, but such a reinforcing member 27 may not be provided. In this case, the end face of the foamed resin layer 10A may be directly covered by the extending portion of the indoor side layer 20 (or the glass fiber sheet 13 and the flame-retardant sheet 12).
Further, in the present embodiment and the sixth embodiment, the ceiling panels 1E and 1F having the same layer structure as the fifth embodiment are illustrated, but the layer structure is the same as that of the other embodiments. But it may be.
Further, a part of the configurations different from each other described in each of the above embodiments may be rearranged or combined to be applied. Further, the configuration of the above-mentioned parts of the ceiling panels 1, 1A to 1F according to each of the above embodiments is only an example, and various other modifications are possible.

Next, an example and a comparative example of the interior panel according to the present invention will be described.
In each of Examples 1 to 3 and Comparative Examples 1 and 2, the foamed resin layer was formed from a foamed polyurethane resin having a foaming ratio of 20 times.
In the first embodiment, the layer structure is the same as that of the ceiling panel 1 shown in FIG. 2 (b). Further, the indoor side layer (front side layer) is ^{a glass paper having a basis weight of 37 g / m 2} constituting the indoor glass fiber sheet and an aluminum sheet having a thickness of 20 μm constituting the flame-retardant sheet on the foamed resin layer side. And composed by. Further, the base side layer (back side layer) was a glass cloth reinforced resin layer containing a glass cloth having ^{a basis weight of 200 g / m 2 constituting the glass fiber reinforced resin layer.} The interior panel according to the first embodiment is created by supplying an uncured polyurethane foam resin on an aluminum sheet of a composite sheet composed of a pre-laminated glass paper and an aluminum sheet, and then supplying a glass cloth on the aluminum sheet. did. The interior panel according to Example 1 had a foamed resin layer having a thickness of about 6.8 mm, a total thickness of 7.1 mm, and a mass of 842 g / m ² .

In the second embodiment, the layer structure is the same as that of the ceiling panel 1A shown in FIG. 3A. In Example 2, the layer structure was substantially the same as that in Example 1 except that a glass cloth reinforced resin layer containing a glass cloth having a ^{basis weight of 200 g / m 2} was provided on the foamed resin layer side of the aluminum sheet constituting the front side layer. .. In the interior panel according to the second embodiment, the uncured polyurethane foam resin is supplied on the glass cloth of the composite sheet made of the glass paper, the aluminum sheet and the glass cloth laminated in advance, and the glass cloth is supplied on the glass cloth. Created. The glass cloth and the aluminum sheet were laminated and bonded with an acrylic adhesive. The interior panel according to Example 2 had a foamed resin layer having a thickness of about 5.3 mm, a total thickness of 5.7 mm, and a mass of 1042 g / m ² .

In the third embodiment, the layer structure is the same as that of the ceiling panel 1D shown in FIG. 3 (d). In the third embodiment, the layer structure is substantially the same as that of the second embodiment except that an aluminum sheet having a thickness of 9 μm forming the exudation suppressing sheet is provided on the back side (base side) of the glass cloth reinforced resin layer constituting the back side layer. did. The aluminum sheet and the glass cloth on the back side layer were laminated and bonded with an acrylic adhesive in the same manner as described above. Further, in Example 3, the basis weight of the glass cloth constituting each glass cloth reinforced resin layer of the front side layer and the back side layer was set to 85 g / m ² respectively, unlike in Example 2. The interior panel according to Example 3 had a foamed resin layer having a thickness of about 3.69 mm, a total thickness of 4.1 mm, and a mass of 545 g / m ² .

In Comparative Example 1, an aluminum sheet having a thickness of 20 μm and a glass paper having a ^{basis weight of 37 g / m 2 were provided on both the front and back sides of the foamed resin layer.} That is, the interior panel of Comparative Example 1 does not include the glass fiber reinforced resin layer. The interior panel according to Comparative Example 1 was prepared by supplying an uncured polyurethane foam resin between the aluminum sheets on both the front and back sides. The interior panel according to Comparative Example 1 had a foamed resin layer having a thickness of 6.6 mm, a total thickness of 6.9 mm, and a mass of 803 g / m ² .
In Comparative Example 2, the comparison was made except that no glass paper was provided on the front side layer and a glass cloth reinforced resin layer containing a glass cloth having a ^{basis weight of 200 g / m 2} was provided on the foamed resin layer side of the aluminum sheet having a thickness of 30 μm. The layer structure was almost the same as that of Example 1. In the interior panel according to Comparative Example 2, an uncured polyurethane foam resin is supplied on the glass cloth of the composite sheet made of the aluminum sheet and the glass cloth of the front side layer, and the composite sheet made of the aluminum sheet and the glass paper is placed on the uncured polyurethane foam resin. Made by supplying. The interior panel according to Comparative Example 2 had a foamed resin layer having a thickness of about 5.5 mm, a total thickness of 5.6 mm, and a mass of 739 g / m ² .

The following evaluation tests were carried out on the test bodies (without end face coating) of the interior panels of Examples 1 to 3 and Comparative Examples 1 and 2 having the above configuration.
<Flexural rigidity evaluation test>
In accordance with JIS K7017, a bending test (3-point bending method) was performed on each test piece (width 40 mm, length 120 mm) with a test speed of 20 mm / min and a distance between fulcrums (span) of 100 mm. (Calculated by measuring the bending stress and calculating the Young's modulus). The measuring device used was the SHIMADZU universal testing machine AG-1 / 50N-10kN. Results In Example 1, 14.9N · ^{m 2,} Example in 2, 5.5 N · ^{m 2,} in Example 3, 3.8 N · ^{m 2,} in Comparative Example 1, 4.4 N · ^{m 2} In Comparative Example 2, it was ^{4.2 N · m 2.} Table 1 shows the 10 N · ^{m 2} or more Yu, a 2.5 N · ^{m 2} or more as good.

<Warp evaluation test>
Both ends of each test piece (910 mm × 910 mm) in one direction are fixed to a ceiling base installed at intervals, and the end part and the center part (center part in one direction) of each test piece in that state The dimensions along the vertical direction (initial warpage amount) were measured. The results were −8.0 mm (concave warp) in Example 1, 3.2 mm (convex warp) in Example 2, 1.0 mm (convex warp) in Example 3, and 3. It was 0 mm (convex warp), and in Comparative Example 2, it was 6.6 mm (convex warp). In Table 1, the amount of warpage is shown as excellent when it is within ± 2 mm, good when it is within ± 2 mm to 5 mm, and acceptable when it is within ± 5 mm to 10 mm.

表１に示すように、実施例１の内装パネルは、反り量が他と比べて大きいものの、曲げ剛性に優れ、概ね良好な結果となった。また、実施例２，３の内装パネルは、全ての評価試験において良好な結果となり、特に、実施例２では、ねじ保持力に優れ、実施例３では、反り量が極めて小さく優れた結果となった。比較例１の内装パネルは、表面硬度及びねじ保持力が極めて小さく、比較例２の内装パネルは、反り量が大きく、ねじ保持力が小さい結果となった。<Surface hardness evaluation test>
A surface hardness evaluation test was performed on each test piece (200 mm × 200 mm). In this evaluation test, a weight having an outer diameter of 50.8 mm and a mass of 533 g was dropped from a height of 300 mm onto the surface of each test piece in accordance with JIS A1408. In addition, the depth of the dent of each test piece formed by the drop of the weight was measured. The results were 1.55 mm in Example 1, 1.24 mm in Example 2, 1.22 mm in Example 3, 1.9 mm in Comparative Example 1, and 1.24 mm in Comparative Example 2. .. In Table 1, a dent depth of 1.4 mm or less is shown as good, 1.7 mm or less is acceptable, and more than 1.7 mm is indicated as defective.
<Screw holding force evaluation test>
A screw (φ4 mm, length 30 mm, countersunk head tapping screw) was screwed into each test piece (100 mm × 100 mm) without a pilot hole, and the load required for pulling out the screw was measured. The measuring device used was the SHIMADZU universal testing machine AG-1 / 50N-10kN. In Table 1, 85N or more is shown as excellent, 60N or more and less than 85N is shown as good, 40N or more and less than 60 is acceptable, and less than 40N is shown as defective.

As shown in Table 1, the interior panel of Example 1 had a large amount of warpage as compared with the others, but had excellent flexural rigidity, and the results were generally good. In addition, the interior panels of Examples 2 and 3 gave good results in all the evaluation tests. In particular, in Example 2, the screw holding force was excellent, and in Example 3, the amount of warpage was extremely small, and the results were excellent. It was. The interior panel of Comparative Example 1 had extremely low surface hardness and screw holding force, and the interior panel of Comparative Example 2 had a large amount of warpage and a small screw holding force.

In addition, for the test piece (100 mm x 100 mm) of the interior panel according to Example 3, "Fireproof performance test / evaluation work method manual (Japan Building Research Institute: established on June 1, 2000) ) ”, The exothermic test was conducted in accordance with“ 4.10.2 Exothermic test method ”. As a result, the total heat generation amount for 20 minutes after the start of heating was 6.30 MJ / m ² , the maximum heat generation rate for 20 minutes after the start of heating was 101.10 kW / m ² , and the crack penetrating to the back surface for 20 minutes after the start of heating. And no holes were found. The result is that the standard ((1) total calorific value for 20 minutes after the start of heating is 8 MJ / m ² or less after the start of heating. (2) After the start of heating. Satisfy that there are no cracks or holes that penetrate to the back surface, which is harmful for fire prevention, for 20 minutes. (3) The heat generation rate does not exceed ^{200 kW / m 2 continuously for 10 seconds or more for 20 minutes after the start of heating.} The results were also excellent for flame retardancy (non-flammability).

1,1A-1F Ceiling panel (interior panel)
2 1st direction end 5 Central part (other part)
10,10A-10E Foamed resin layer 12 Flame-retardant sheet 12A Exudation suppression sheet 14, 14A-14C Glass fiber reinforced resin layer 14a Glass fiber sheet 15 Fixed part 6 Ceiling base (interior base)

Claims (11)

The foamed resin layer, the flame-retardant sheet provided on the indoor side of the foamed resin layer, and the interior base side of the foamed resin layer are provided, and the resin main component and the resin main component of the foamed resin layer are the same. It is equipped with a glass fiber reinforced resin layer.
The glass fiber reinforced resin layer, the resin composition constituting the foamed resin layer in the glass fiber sheet constituting the glass fiber reinforced resin layer is formed is impregnated, the glass fiber sheet glass cloth der Rukoto The characteristic interior panel. In claim 1,
Wherein the interior base of the glass fiber-reinforced resin layer, interior panel, wherein the exudation suppression sheet is provided. In claim 2 ,
The interior panel is characterized in that the exudation suppressing sheet is at least partially adhered to the resin composition that has passed through the glass fiber sheet. In any one of claims 1 to 3 ,
The flame-retardant sheet is an interior panel characterized in that the flame-retardant sheet is laminated and integrated with the foamed resin layer by a resin composition constituting the foamed resin layer. In any one of claims 1 to 4 ,
An interior panel characterized in that a glass fiber reinforced resin layer is provided on the flame-retardant sheet side of the foamed resin layer. In claim 5 ,
In the glass fiber reinforced resin layer on the flame-retardant sheet side, the resin main component is the same as the resin main component of the foamed resin layer, and the foamed resin layer is formed on the glass fiber sheet constituting the glass fiber reinforced resin layer. An interior panel characterized in that it is formed by impregnating a constituent resin composition. The foamed resin layer, the glass fiber reinforced resin layer provided on the indoor side of the foamed resin layer and having the same resin main component and the resin main component of the foamed resin layer, and the indoor side of the glass fiber reinforced resin layer. A flame-retardant sheet provided, a glass fiber reinforced resin layer provided on the interior base side of the foamed resin layer and having the same resin main component and resin main component of the foamed resin layer, and the glass fiber reinforced resin. It is equipped with an exudation suppression sheet provided on the interior base side of the layer.
The glass fiber reinforced resin layer on the indoor side is the foamed resin layer in a state where the flame-retardant sheet is laminated and integrated with the glass fiber sheet on the indoor side constituting the glass fiber reinforced resin layer to form a composite sheet. The flame-retardant sheet is laminated and integrated with the foamed resin layer by being impregnated with the resin composition constituting the above material and at least partially adhered to the resin composition that has passed through the glass fiber sheet on the indoor side. And
The glass fiber reinforced resin layer on the interior base side is the foamed resin in a state where the exudation suppressing sheet is laminated and integrated with the glass fiber sheet on the interior base side constituting the glass fiber reinforced resin layer to form a composite sheet. The resin composition constituting the layer is impregnated and formed, and at least partially adhered to the resin composition that has passed through the glass fiber sheet on the interior base side, and the exudation suppressing sheet is laminated and integrated with the foamed resin layer. Interior panel characterized by being made. In any one of claims 1 to 7 ,
Glass fiber sheet constituting the glass fiber reinforced resin layer, basis weight is the glass cloth ^{50g / m 2 ~300g / m 2} , the flame retardant sheet has a thickness comprises an aluminum sheet of 5μm~50μm Interior panel characterized by being. In any one of claims 1 to 8 ,
The resin composition constituting the foamed resin layer is an interior panel characterized by being a foamed polyurethane resin having a foaming ratio of 10 to 30 times. In any one of claims 1 to 9 ,
It said glass fiber sheet constituting the glass fiber reinforced resin layer, interior panel, wherein the basis weight is a glass cloth ^{50g / m 2 ~150g / m 2} . In any one of claims 1 to 10,
The foamed resin layer has a higher density and a smaller thickness than the other parts at both ends in the first direction, which are both opposite ends of the four peripheral ends of the interior panel. An interior panel characterized by having a fixed part.

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