JP2006249838A - Floor panel with backside heat-insulating material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floor panel which stabilizes heat insulation properties without making site work for construction of a heat insulating material performed on the backside of the floor panel on the site of construction of a double floor using the floor panel made of a resin containing a filler. <P>SOLUTION: This floor panel 11 made of a resin filled with a woody material is molded by pressurizing a thermoplastic resin mixture, wherein the woody material is mixed and melted, while cooling it; a plurality of ribs 12 are provided on the backside of the floor panel 11 in a grid pattern; a plurality of recesses are composed of the ribs; and the heat insulating material 2 is fixed to the recess in such a manner as to be attachable to/detachable from the floor panel 11. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a floor panel used for a double floor in which a floor is laid on a floor base surface via a space, and more particularly relates to a floor panel made of a filler-containing resin having a heat insulating material fixed to the back surface. .

  In the floors of apartment houses such as offices and apartments, a space is often provided between the floor base surface and the floor surface to form a double floor, and electrical wiring and piping are often performed in the space. The floor panel used for this double floor is usually used by processing a so-called particle board made of a wood-based material and a resin.

  On the other hand, in recent years, a raw material is a mixture of a fine powdery woody material mixed with a thermoplastic material and a woody material such as a slender piece of wood with a long side of about 150 mm. It is melted and mixed in a machine, a melt-kneader, etc., formed into a molded product made of a wood-based material-filled resin by press molding or the like, and used as a floor panel for the double floor.

  For example, such a wood-based material-filled resin floor panel is formed of, for example, a lattice body having an opening on the back surface side of the floor panel body, and a separate support leg is formed at an arbitrary opening formed by the lattice body. A floor panel is known that supports a floor panel material by inserting a wall to form a double floor (see, for example, Patent Document 1).

  However, as shown in FIG. 1 of Patent Document 1, the floor panel of Patent Document 1 is formed of a lattice body having a plurality of ribs whose front and back surfaces are all intersecting with each other. And since there is a possibility of inserting a leg into an arbitrary recess formed by a lattice on the back side of the floor panel, that is, an opening, nothing is attached to all the recesses. Therefore, this floor panel cannot be used as a flooring as it is because the surface side remains a lattice, and there is a problem that a floor surface finishing material has to be provided thereon.

  On the other hand, projecting reinforcing ribs that intersect each other are provided on the back surface of the plate-like panel body to form a lattice-shaped recess, and a part of the recess is formed as a recess dedicated to the connection support leg mounting. 2. Description of the Related Art A panel that connects or supports panel bodies by attaching a connection support leg is known (for example, see Patent Document 2).

  The panel of Patent Document 2 is not made of a filler-containing resin whose filler is a wood-based material, but is a panel whose upper surface is plate-shaped as shown in FIGS. It can be used as a flooring without using a surface finish. However, since there is no heat insulating material attached to the recess on the back side, if it is used as it is as a flooring material, there will be heat in and out from the floor surface, and it will take a lot of energy for air conditioning in summer, winter etc. There is.

  Therefore, when performing heat insulation treatment such as such a double floor, at the work site, heat insulating material such as synthetic resin foam or glass wool is cut out in accordance with the lattice-shaped concave portions and is formed in the concave portions. On-site work is performed in which heat insulation is provided by in-situ foaming by inserting and fixing or blowing urethane resin or the like on the back of the panel.

Floor panels that involve such on-site construction may cause the thermal insulation performance to become unstable because the thermal insulation attached and fixed to the grid-shaped recesses by the operator's heels may become unstable, and it will be labor intensive and expensive. There is a problem of becoming.
No. 7-48855 JP-A-7-233614

  The present invention is a construction site for a double floor using a floor panel made of a resin containing a filler, and a floor panel having stable thermal insulation performance without performing on-site construction for construction of thermal insulation on the back surface of the floor panel. It was made for the purpose of providing.

  A floor panel with a backside heat insulating material according to claim 1 (invention 1) is a floor panel made of a filler-containing resin formed by pressing a pressure while cooling a thermoplastic resin mixture mixed with a filler. A plurality of ribs are provided in a lattice shape on the back surface of the plate-like main body of the floor panel, and a plurality of recesses are formed by the ribs, and a heat insulating material is detachably fixed to the floor panel in the recesses. Features.

  A floor panel with a backside heat insulating material according to claim 2 (invention 2) is a substantially square floor made of a filler-containing resin, which is molded by cooling and pressing a molten thermoplastic resin mixture mixed with a filler. A plurality of ribs are provided in a lattice shape on the back surface of the plate-like main body of the floor panel, and a plurality of recesses are formed by the ribs, and a heat insulating material is provided in recesses other than the four corners of the floor panel. It is characterized by being detachably fixed.

  According to a third aspect of the present invention (invention 3), the heat insulating material is a plate-like foam made of a synthetic resin foam, and the plate-like foam is provided with a lattice-like groove into which the lattice-like rib is fitted. The floor panel with the backside heat insulating material according to invention 1 or 2, wherein the groove is fitted into the rib and the heat insulating material is detachably fixed to the back surface of the floor panel.

  The filler-containing resin panels according to the first to third aspects of the present invention are substantially square floor panels formed by pressing a molten thermoplastic resin mixture mixed with a non-vegetable material or a woody material while cooling. is there.

  If the filler can improve the mechanical properties and appearance required according to the purpose, such as increasing the rigidity and elastic modulus of the molded product or improving the wood texture, etc., by mixing this filler For example, non-vegetable materials such as calcium carbonate, talc, glass fiber, and synthetic resin fibers, and pulverized to slender crushed wood, rice husks, plant-based materials, and the like can be given as examples.

  When the filler is a non-vegetable material, it is mainly used to increase the rigidity and elastic modulus of the resulting molded product (floor panel). When the filler is a wood-based material, the appearance and feel of the resulting floor panel, etc. However, it is closer to wood than when non-plant-based materials are used. Therefore, it is preferable to use a plant material. However, when mixing a filler with a molten thermoplastic resin to obtain a floor panel, as described above, it is difficult to prevent damage to the plant material when mixing a non-plant material. Therefore, in the following description, a floor panel using a plant-based filler is cited and described.

  If the aspect ratio is less than 3, the effect as the reinforcing material is reduced. In addition, the above-mentioned orientation means that the length direction of the wood-based material is aligned in a direction within about ± 30 ° with respect to the orientation near the reference line with respect to the direction of the reference line.

  In the case of a wood-based material, the tree type of the wood-based material is not particularly limited as long as it is a general-purpose architectural or structural wood-based material. For example, conifers such as cedar, cypress, spruce, fur, radiata pine, etc .; broadleaf trees such as birch, apton, chamelere, sengonlaut, aspen, etc., not only woody materials produced from these forests, Plant materials produced outside the forest, such as bamboo and sorghum, can also be included.

  Forms that can be used as wood-based materials are not particularly limited, but, for example, logs of the above tree species, raw materials such as thinned wood, scraps generated at factories and residential building sites, waste pallet materials discarded after transportation of materials, building demolition Arbitrary wood-based materials such as dismantling waste materials and waste materials such as distribution packing materials that are sometimes generated can be used as raw materials in combination of one or several kinds.

  The wood-based material is in the range of 30% by weight to 80% by weight in the total raw materials. The mixing ratio (parts by mass) of the wood-based material and the thermoplastic resin is preferably 30:70 to 80:20, more preferably 40:60 to 70:30, and still more preferably 50:50 to 60:40.

  If the proportion of the wood-based material is more than 80% by weight, mutual dispersion becomes difficult during melt mixing, and the thermoplastic resin does not physically bond with the wood-based material, so that the nest can easily enter the molded product and the moldability deteriorates. There are things to do. Further, if the ratio of the woody material is less than 30% by weight, there is a problem that the elastic modulus becomes low and it is not suitable as a floor material. Therefore, it is preferable to appropriately adjust the supply amount so that the mixing ratio of the woody material is within the above range. However, in general, when an inorganic powder is used as the filler, the rigidity of a molded product obtained is increased, and therefore a wood-based material and an inorganic filler may be used in combination.

  The wood-based material is a mixture of wood-based materials of various sizes from the above wood species to the crushed chips. The wood-based material may contain 20% by weight or more of wood crushing chips having a thickness or width of 1 mm or more, a length of less than 10 mm, and an aspect ratio of less than 3. If the width or thickness is less than 1 mm, the wood crushing chips may be broken by collision and subdivided when the thermoplastic resin is melted by the stirring blades. Molding is possible even if the length is greater than 10 mm, but if it is too large, the surface of the molded product may have concavities and convexities and the appearance may deteriorate, and this is mixed with molten thermoplastic resin and melted. When making a mixture, it is preferably less than 10 mm so as not to apply a large load to the stirrer.

  If the aspect ratio is 3 or more, the surface of the wood-based material is unevenly covered with the thermoplastic resin, and there is a possibility that the appearance and the feel of the wood will be lost. In addition, the chance of collision between the wood crushing tip and the stirring blade increases, and the thickness or width of the wood crushing tip becomes 1 mm or less, and the content in the wood-based material of the wood crushing tip of a predetermined size is reduced. The risk of being less than 20% by weight increases.

  Moreover, when the crushing chip | tip of the said dimension is less than 20 weight% in a wood type material, the fault that the molded article obtained will lose the touch peculiar to a wood type material will come out.

  As described above, the crushed wood chip in the wood-based material is preferably 20% by weight or more, more preferably 30% by weight or more, and further preferably 45% by weight or more if the width or thickness is 1 mm or more. The remainder may be made of a woody material having a width or thickness of less than 1 mm. The remaining woody material in this case may have a length of 10 mm or more or an aspect ratio of more than 3.

  As a method for obtaining the above wood-based material, a material obtained by cutting wood as a raw material into a stick by cutting a veneer processed with a hammer mill or a rotary cutter into a chopsticks shape, cutting a log with a rotary blade of a flaker and strand And a method of crushing a wood-based material by rotating a roll with a blade on the surface of a uniaxial crusher.

  And generally, the thickness and length of the wood-based material crushed as described above are uneven. Therefore, the wood-based material is classified and adjusted in size so as to contain 20% by weight or more of crushed wood chips having a width or thickness of 1 mm to 10 mm and an aspect ratio of less than 3. The classification method is not particularly limited as long as it can be classified with a certain range of thickness and length. For example, a classification method using a classifier such as a wave roller system, which is a device that classifies continuously based on the thickness of the chip, a method using a sieve with a predetermined opening, and the like can be given.

  For example, the raw woody material is roughly pulverized to a few centimeters with a jaw crusher or gylen tri-crusher and then introduced into a hammer mill, cutter mill, roll mill, etc., and finely crushed to a width or thickness of several millimeters. The obtained needle-shaped finely pulverized product is passed through a sieve having an opening of 7 mm to remove a piece of wood having a long side of more than 10 mm, and further passed through a sieve having an opening of 0.7 mm to remove a wood-based material having a long side of less than 1 mm, You may make it the average size of a wood type material become in the range of 1 mm-10 mm. In this way, a wood material in which 20% by weight of the wood material is a 1 mm to 10 mm wood crushing chip is obtained.

  The type and moisture content of the raw material wood material, or the aspect ratios of the individual fragments of the wood material obtained by the method of coarse pulverization or fine pulverization are in various ranges. Therefore, when the content of the wood crushing chip having an aspect ratio of less than 3 in the wood-based material obtained by the above method is less than 20% by weight, the opening of the sieve to be used is changed to change the size of the wood-based material. A general method such as a method of changing the size, a shape of a hammer or blade in a crusher, a method of adjusting the clearance between the chamber and the hammer, or the blade may be used.

  Furthermore, it is preferable that the wood-based material has a constant moisture content. By keeping the water content constant, the quality variation of the molded product obtained from the wood-based material-filled resin composite is reduced. A preferable water content is 0 to 10% by weight. The method for keeping the moisture content constant is not particularly limited, but for example, a method of leaving the wood-based material for a certain time in a temperature-controlled oven can be given. Incidentally, when left in an oven at 50 ° C. for 24 hours, the water content is maintained at about 5%.

  The woody material may be subjected to various treatments such as antiseptic and antifungal treatments. By using a wood-based material that has been subjected to antiseptic treatment, a preservative / anti-bacterial effect is exhibited in a molded product obtained from this wood-based material-filled resin composite.

  In addition, after crushing the wood-based material as it is or to an arbitrary size, after putting it in a pressure cooker and heating it to 200 ° C., for example, releasing the pressure and crushing the material that has been ruptured by the impact of the pressure difference at that time You may add what was made into powder by the machine and was made into the crushed wood flour. As is generally known, the addition of explosive wood flour is preferable because the strength of the molded product is remarkably improved.

  The thermoplastic resin used is not particularly limited as long as the resulting molded product has excellent bending strength and can be melted by mixing and stirring. For example, polypropylene (PP), polyethylene (PE), polystyrene, polybutene, poly Isoprene, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, acrylonitrile-styrene copolymer such as AAS, ABS, ACS, AES, ester resin such as polyamide, polycarbonate, polyethylene terephthalate, polybutylene terephthalate , Methacrylic, polyurethane, vinyl chloride resin, chlorinated polyvinyl chloride, and the like, and only one or several of these may be used in combination. These resins may contain stabilizers, lubricants and the like. Among these, polyolefin resins such as PE and PP are desirable because of their low cost.

  The thermoplastic resin may be in the form of powder or pellets. However, the lower the fine powder, the higher the uniform dispersibility with the wood-based material during kneading, so the lower limit is not particularly limited. In addition, since the raw material cost is high in powder form, it is desirable to use a pellet-shaped thermoplastic resin.

  Other additives are not particularly limited, and known additives according to the use may be appropriately selected and used. For example, additives such as α, β-unsaturated carboxylic acid monomers, admixture promoters such as acid-modified olefins and acid-modified low-molecular olefins; reinforcing materials such as glass fibers and carbon fibers; UV absorbers and UV degradation prevention Various stabilizers such as additives and antioxidants; (internal) lubricants such as lead stearate, colorants such as pigments and extender pigments; various fillers, preservatives, flame retardants, antioxidants, nucleating agents, etc. Various additives etc. are mentioned. These additives can be used alone or in combination of two or more.

  The addition of a mixing accelerator is preferable because the adhesion between the woody material and the thermoplastic resin is improved. As the mixing accelerator, those that form a hydrophilic group in the end of the polymer or in the molecule are preferable, and the type and bonding position of the hydrophilic group are not particularly limited. Modified olefin-based admixture accelerators that form hydrophilic groups in the polymer and admixture accelerators having hydrophobicity and hydrophilicity are particularly preferred because they exhibit excellent effects even at low amounts.

  The addition amount of the various additives is not particularly limited as long as the addition amount is appropriately adjusted according to the kind of the additive so that a desired effect can be obtained. For example, when MAPP (maleic anhydride modified polypropylene) is used as an additive, the additive is preferably added in an amount of 2 parts by mass or more with respect to a total of 100 parts by mass of the thermoplastic resin (PP) and the woody material. More preferably, it is suitably added so as to be 3 parts by mass or more, preferably 5 parts by mass or less, more preferably 4 parts by mass or less. If the additive amount is small, the additive may not sufficiently exert the effect of improving the adhesion between the thermoplastic resin and the wood-based material. Even if it is added in a large amount, a remarkable improvement effect may not be obtained.

  The floor panel made of this wood-based material-filled resin is, for example, a method in which a predetermined weight of the above-mentioned wood-based material and thermoplastic resin is put into a mixing container provided with a plurality of stirring blades, and the stirring blades are rotated at high speed. It is manufactured by a method in which a molten mixture obtained by mixing a thermoplastic resin melted by frictional heat generated by stirring and a wood-based material is cooled and pressed while being pressed. The

  The wood-based material is supplied to a known melt mixing apparatus (described later) together with a thermoplastic resin and preferably an additive. Each of these materials may be provided with a feeder and supplied separately to the apparatus, or a premixed material may be supplied to the apparatus, and the supply method is not particularly limited.

  The melt mixer is not particularly limited as long as it is an apparatus that forms a molten mixture obtained by melting a thermoplastic resin and mixing a wood-based material. For example, a method of using a general extrusion apparatus wo or a rotating shaft inserted into a melt mixing chamber is provided with a plurality of stirring blades for melting thermoplastic resin by frictional heat, and mixed in the preceding process. A melt mixer (for example, a K-mixing machine, a cohan) is obtained by feeding a wood-based material and a resin into the chamber and rotating a stirring blade to obtain a molten mixture in which the wood-based material is mixed with a molten thermoplastic resin. A method using a product (trade name)). In this method using the melt mixer, the wood material and the thermoplastic resin can be melt-mixed without any pretreatment such as preliminary drying, and without making the wood material into fine powder. .

  In the present invention, as the woody material, a woody material containing 20% by weight or more of wood crushing chips having a thickness or width of 1 mm or more, a length of less than 10 mm, and an aspect ratio of less than 3 is used in the piece of wood. This prevents the wood-based material from being destroyed by the high-speed rotating blades, so that the wood-based material is practically close to powder in the chamber of the melt mixer and is not covered with resin. Yes.

  That is, among the wood crushing chips put into the chamber, those with a thickness or width of 1 mm or more are less likely to be destroyed even under impact by high-speed agitation, and can maintain their shape. The number of times that the wood crushing chip collides with the stirring blade is reduced by setting the value to less than 3. Therefore, the woody crushing chip of this shape maintains the original shape even after melt mixing.

  The wood-based material-filled resin is made into a molten mixture. When the molten wood-based material-filled resin block is filled in a press mold and pressed while cooling, a molded article or floor using the wood-based material filled resin is used. A panel is obtained.

  In the molten mixture obtained by the melt mixer, the wood crushing chips in the molten mixture are distributed more on the surface than inside, and the wood crushing chips are exposed on the surface. Therefore, a molded product manufactured by putting it in a press die and cooling it while applying pressure has a woody material exposed on the surface of the molded product. Therefore, the appearance and feel of the molded product is close to that of wood, and a floor panel made of a wooden material-filled resin that maintains the unique surface and warmth of the wooden material can be obtained.

  In order to obtain a molten mixture in which many pieces of wood crushing chips are distributed on the surface, the clearance between the stirring blades of the mixing vessel for producing the molten mixture and the inner surface of the vessel is a clearance that allows the wood crushing tips to move, And the rotation speed of a stirring blade is good to be 3000-6000 rpm. This is because, since the rotational speed is high, the thermoplastic resin put into the mixing container is melted by frictional heat, and the woody material is mixed with the melted resin to form a molten mixture.

  At this time, the wood crushing chips to be mixed are unevenly distributed on the inner wall side of the mixing container by the stirring blades. Between the mixing blade and the inner wall of the mixing vessel is provided with a clearance of a size capable of moving the wood crushing chip, so that the unevenly distributed wood crushing chip is unevenly distributed near the surface of the molten mixture, As the strength increases, the appearance and feel of the material approximates that of wood.

  In this way, the floor panel obtained from the wood-based material-filled resin is provided with a plurality of intersecting protruding ribs on one surface of a rectangular flat plate-like body to form a lattice-shaped recess. The recess is fitted with a leg portion that fits into the recess, and a space is formed between the floor base and the floor panel body by the leg portion to form a double floor. The other surface on which the ribs are not provided remains in a flat plate shape excellent in wood texture, and can be used as it is as a floor surface material, but may be subjected to surface finishing such as cork or carpet.

  One of the functions necessary for a floor of a residence is heat insulation performance and sound insulation performance, and the floor panel of the present invention obtained by the above method is pre-grided in advance on the back surface after production in order to improve heat insulation performance and sound insulation performance. The heat insulating material is detachably fixed to the shape-shaped recess and shipped. The heat insulating material may be fixed in advance at the time of shipment, or may be fixed at a construction site.

  The heat insulating material is detachably fixed in advance to the grid-like recesses on the back side of the floor panel, and transported to the double floor construction site where double floor construction is performed. It must be avoided. Therefore, the heat insulating material may be a general heat insulating material. For example, covered glass wool; PE (polyethylene), PP (polypropylene), acrylic resin, styrene resin, vinyl chloride resin. And resin foams such as hard or soft urethane resin, phenol resin, polyethylene terephthalate (PET), and polybutylene terephthalate (PBT).

  The heat insulating material is measured and molded into a shape that fits into the lattice-shaped recess, and is inserted into the corresponding recess. As described above, since the heat insulating material may not be removed from the back surface of the floor panel during transportation or construction, the method of removably fixing the heat insulating material to the recess is not particularly limited. Make the measurement size of the insulation material slightly larger than the recess shape and push the insulation material into the recess so as to compress it, or fix the surface where the insulation material contacts the recess with double-sided adhesive tape, depending on the material Alternatively, the adhesive may be applied and fixed in the recess.

  Moreover, a heat insulating material may be fixed so that it may fit in a floor panel back surface grid | lattice recessed part inside, and may cover and fix the protruding rib which forms a grid | lattice-like recessed part. In addition, floor panels to which heat insulating material is fixed are individually wrapped with paper, plastic, etc., or a plurality of floor panels are packed together, or the heat insulating materials do not directly face the outside together. Then packed and transported.

  In the invention 1, the recessed portion provided with the heat insulating material is an arbitrary recessed portion or all recessed portions. In this case, a floor panel support leg removes a heat insulating material from the recessed part of the location which attaches it, and is fitted there.

  In invention 2, the recessed part which provides a heat insulating material shall be arbitrary recessed parts except all the recessed parts of four places of a floor panel corner | angular part, or all the recessed parts. In this case, the floor panel support legs may be mounted on the four floor panels over the recesses where there is no heat insulating material at the abutting location of the four floor panels to be abutted in the center of the floor surface, Along the side of the floor surface, it is only necessary that the two floor panels are fitted in a recess where there is no heat insulating material at the butted portion, over the two floor panels. What is necessary is just to mount | wear to the recessed part which does not have the heat insulating material in the corner of a floor panel.

  In the invention 3, the heat insulating material is fixed so as to cover the protruding ribs that form the lattice-shaped recesses. In this case, the heat insulating material is a hard plate-like foam, and a groove into which the projecting rib forming the lattice-like recess is fitted is cut into the plate-like foam so as to project the groove. The heat insulating material is fixed to the back surface of the floor panel by fitting into the rib.

  In invention 1, since the heat insulating material is detachably fixed to the floor panel in advance, at the construction site of the double floor using the floor panel made of the wooden material filled resin, the heat insulating material is applied to the back surface of the floor panel. Therefore, the heat insulation performance does not become unstable due to the operator's dredging. Moreover, the heat insulating material of a required location can be easily removed also when attaching a support leg.

  In the invention 2, since the heat insulating material is not provided only in the concave portions at the four corners of the floor panel, it is not necessary to remove the heat insulating material from the concave portion of the mounting portion when the support legs are mounted, and the work is not time-consuming. Above, there is no waste of insulation.

  In the invention 3, since the heat insulating material is a hard plate-like resin foam, and the groove into which the protruding rib is fitted is engraved, the heat insulating material is fixed so as not to be detached from the floor panel during transportation or the like. . Moreover, a heat insulating material will be provided covering the whole back surface of a floor panel including a protruding rib, and the heat insulation effect is more excellent.

  Next, the present invention will be described with reference to the drawings.

  Fig.1 (a) is the top view seen from the back surface side of an example of the floor panel with a back surface heat insulating material of invention 1, (b) is AA sectional drawing of (a). In the floor panel 1 with the back surface heat insulating material, a plurality of protruding ribs 12 are arranged to intersect with the back surface of the floor panel main body 11 serving as a floor surface, thereby forming a plurality of lattice-shaped recesses 13. The recess is a recess in which a support leg (not shown) for supporting the floor panel 1 on a floor base (not shown) is mounted, and at the four corners, sides, and center of the floor panel body 11, As shown in the figure, the shape may be changed.

  In this example, the heat insulating material 2 formed by measuring according to the shape of each recessed part 13 is inserted in all the recessed parts 13. The heat insulating material 2 is a hard urethane resin foam (30-fold foamed product), and is adhesively fixed to the bottom surface of the recess 13 with a double-sided adhesive tape (not shown). Therefore, when attaching a support leg, the heat insulating material 2 can be removed easily. The same applies to the case where the heat insulating material 2 is another material.

  As described above, the floor panel 1 in which the heat insulating material 2 is fitted into the lattice-shaped concave portion 13 on the back surface is individually wrapped, packaged in a plurality, or matched so that the heat insulating materials 2 face each other. If multiple pairs of floor panels 1 are tied together, etc., the heat insulating material 2 is not easily damaged during transportation to the double floor construction site, and there is no need to perform the heat insulation construction work on site. Therefore, the thermal insulation performance is stable no matter who works.

  Fig.2 (a) is the top view seen from the back surface side of an example of the floor panel of invention 2, (b) is BB sectional drawing of (a). In the invention 2, the heat insulating material 2 is not fitted only in the recesses 13 at the four corners of the floor panel 1, and the support legs are mounted in the recesses 13 at the four corners. Therefore, it is not necessary to remove the heat insulating material 2 when mounting the support legs, and the work is not time-consuming and waste of the heat insulating material 2 is not required.

  FIG. 3 is an example of the floor panel of the invention 3, wherein (a) is a cross-sectional view of the heat insulating material, and (b) is a cross-sectional view of the state in which the heat insulating material of (a) is fitted into the protruding ribs of the floor panel. . The hard plate-like heat insulating material 2 has grooves 21 that are fitted into the protruding ribs 12 provided on the back surface of the main body 11 of the floor panel 1. If this groove | channel 21 is engage | inserted in the protruding rib 12, the whole back surface of the floor panel 1 will be in the state covered with the heat insulating material 2, and the outstanding heat insulation performance will be exhibited. In addition, since the plurality of protruding ribs 12 are provided in a lattice shape and the groove 21 of the heat insulating material 2 is fitted therein, the floor panel 1 and the heat insulating material 2 can be transported without using any adhesive or adhesive tape. It is in a fixed state without detaching during floor construction. In addition, the support leg is mounted by cutting out the heat insulating material 2 in the recess in which the support leg is mounted.

  FIG. 4 is a cross-sectional view showing a part of an example of a wood-based material-filled resin composite melt mixer. However, since the whole manufacturing process of the floor panel 1 of the present invention will be complicated when described with reference to the drawings, the entire process is not shown. Into the hopper 31 of the melt mixer 3, a thermoplastic material, a wood-based material whose shape, size, moisture content, etc. are adjusted, and a raw material G mixed with other compounding agents in a predetermined compounding amount as required are charged. A predetermined amount of the mixed raw material G is sent to the chamber 32 by a screw 33 that is rotated by an electric motor or the like. A plurality of stirring blades 321 are provided in the chamber 32 for mixing raw materials and melting the thermoplastic resin by frictional heat generated at that time.

  A gap S is provided between the stirring blade 321 and the inner wall of the chamber 32 in order to smoothly rotate the stirring blade 321. When the wood-based material G is mixed with the melted thermoplastic resin, the wood crushing chips having a predetermined size G in the wood-based material maintain the original shape after the melt-mixing. When the wood material G is mixed into the molten resin by the stirring blade 321, a large number of wood crushing chips having a large size are present on the surface side of the lump of the molten mixture. It will be in a state of being distributed inside. The fine powdery wood raw materials dispersed on the inside are dispersed inside the mass of the molten mixture as a filler, resulting in a mass of the molten mixture having a small central part size and a large surface side size, and an unevenly distributed size. .

  The molten mixture thus obtained is taken out from the discharge port 34 and placed in a molding die. The molten mixture is put in a molding die in a molten state, and pressed with cooling with a press to form a floor panel.

  The floor panel with a heat insulating material of the present invention can be used not only as the floor panel for double floors but also as a floor foundation of an apartment house, an office, a store or the like without using support legs. Moreover, since the heat insulating material is directly fixed to the back surface of the panel, when floor heating is installed, it is possible to provide a floor base having a very excellent heat insulating property.

It is the figure seen from the back surface side of an example of the floor panel of invention 1, (a) is a top view, (b) is AA sectional drawing of (a). It is the figure seen from the back surface side of an example of the floor panel of invention 2, (a) is a top view, (b) is BB sectional drawing of (a). It is sectional drawing of an example of the floor panel of the invention 3. It is sectional drawing which shows a part of example of the melt mixer of a wood type material filling resin composite.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Floor panel with back surface heat insulating material 11 Floor panel main body 12 Protruding rib 13 Grid-shaped recessed part 2 Heat insulating material 21 Groove 3 Melt mixer 32 Chamber 321 Stirring blade 33 Screw 34 Discharge port G Raw material

Claims (3)

  A floor panel made of a filler-containing resin, which is molded by cooling and pressurizing a molten thermoplastic resin mixture by mixing a filler, and a plurality of grids are formed on the back surface of the plate-like body of the floor panel. A floor panel with a back surface heat insulating material, wherein a rib is provided, and a plurality of concave portions are formed by the rib, and a heat insulating material is detachably fixed to the floor panel in the concave portion.   A substantially square floor panel made of a filler-containing resin, which is molded by cooling and pressing a molten thermoplastic resin mixture mixed with a filler, and is formed in a grid pattern on the back surface of the plate-like body of the floor panel And a plurality of recesses are formed by the ribs, and a heat insulating material is detachably fixed to recesses other than the four corners of the floor panel. panel   The heat insulating material is a plate-like foam made of a synthetic resin foam, and the plate-like foam is provided with a lattice-like groove into which the lattice-like rib is fitted, and the groove is fitted into the rib to obtain a heat insulating material. The floor panel with a heat insulating material according to claim 1 or 2, wherein the floor panel is detachably fixed to the back surface of the floor panel.

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