JP2007098921A - Composite board material, and box-shaped article composed of the composite board material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a surely laminated composite board material using no adhesive agent and a box-shaped body using the board material. <P>SOLUTION: There is provide the multi-layer composite board material which is suitable for a structural material, a protection material and a surface material or the like for a box-shaped article such as a carrying container or a packaging case or the like, and easy for recycling. The composite board material 1 is provided with a laminated structure prepared by, for instance, thermally fusing at least an outer peripheral side region X of a board of a thermoplastic resin board material so as to trim the region, and integrating the thermoplastic resin boards A, B. In this method, various materials of the same kind or different kinds can be laminated. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a composite plate having a laminated structure. More specifically, the present invention relates to an adhesive-free composite plate material in which materials such as a thermoplastic resin plate material and other plate materials are integrated by thermal fusion, and a box-like body formed of the composite plate material.

  A plate material formed of a synthetic resin is excellent in moldability, lightness, water resistance, heat retention / heat insulation properties, weather resistance, and the like. For this reason, in recent years, this synthetic resin plate material has been generally adopted as a face material for a transport container or a packing case, or as various structures.

  In particular, synthetic resin corrugated cardboard, which has the same core structure as paper corrugated cardboard, expands the use of containers and cases (boxes) that can be recovered from the transport destination and reused. It is used in clearly differentiated application fields.

  In addition, due to diversification and high performance of products and products in recent years, with respect to containers and cases for packing and transporting them, strength against loading pressure and impact force, buffer performance that can reduce vibration and swinging, Functionality such as antistatic properties, antibacterial properties, and chemical resistance has begun to be required. Therefore, in the field of synthetic resin plate materials, there are movements of multilayering and compounding of different materials, and this movement is considered to further increase in the future.

Patent Document 1 discloses a technique for improving buffering performance by laminating two or more cardboards with their cores adhered to each other with an adhesive. Patent Document 2 discloses a plastic corrugated cardboard composite product in which a concavo-convex sheet, a liner, and a foam sheet are laminated and integrated by heat fusion. Patent Document 3 discloses an antibacterial cardboard sheet, and Patent Document 4 discloses a cardboard sheet that can suppress the generation of static electricity.
Japanese Utility Model Publication No. 5-82867. Japanese Patent Laid-Open No. 6-170993. JP 2001-130649 A. JP-A-7-060882.

  It is desirable that containers and cases used for packing and transporting raw materials, parts, products, products, and the like can be recycled instead of being disposable from the viewpoint of reducing environmental impact and saving energy. In other words, it is desirable that containers and cases damaged by long-term use can be returned to the synthetic resin raw material and the same quality plate material can be produced again from this recycled raw material. In addition, antifouling properties and hygiene of containers and cases are also required.

  However, plate materials that have been multi-layered or combined with an adhesive require measures to prevent the adhesive from being mixed into the recycled material, making it difficult to recycle and increasing the cost of the adhesive. There was a technical problem. Further, in the corrugated cardboard that has been multilayered or compounded with the adhesive, there is a possibility that moisture and dust may enter the gap between the corrugated cardboard due to uneven application of the adhesive. In addition, if the core structure unique to synthetic resin corrugated cardboard is exposed on the end face, rainwater, dust, insects, etc. will enter the hollow portion of the core and become unsanitary, and furthermore, it is difficult to perform cleaning operations. .

  Therefore, the present invention is surely laminated and integrated without using an adhesive, and in particular, when using synthetic resin cardboard, it is laminated by heat sealing so as to close the hollow portion of the core structure. The main object is to provide a composite plate material and a box-shaped body using the composite plate material.

  In the present invention, first, a composite plate material in which the same kind or different kinds of materials are laminated and integrated with the thermoplastic resin plate material by heat-sealing so that at least the outer peripheral side region of the plate surface portion of the thermoplastic resin plate material is trimmed. In addition, a box-shaped body such as a container or a case using the composite plate material having the above-described configuration is provided.

  The thermoplastic resin plate material is a plate-like body formed of a thermoplastic resin that can be thermally fused, such as a polyolefin resin or a polycarbonate resin. The structure of the thermoplastic resin plate material is not particularly limited, and may be a solid structure plate or a synthetic resin cardboard having a core structure (rib structure).

  Further, in the present invention, it is free to form a laminated structure using at least two synthetic resin corrugated cardboards. In this case, the synthetic resin corrugated cardboard which is in a face-to-face relationship with the intervening layer sandwiched between them is free. You may make it laminate | stack so that a center direction may orthogonally cross or cross | intersect. By crossing or intersecting the center direction, strength against product pressure and weight from four directions increases.

  The laminated material combined with the thermoplastic resin plate material is not particularly limited as long as the thermoplastic resin plate material can be heat-sealed. In addition, a functional material that adds some physical characteristics can be used for the laminated material.

  The composite plate material and box-like body according to the present invention are easily recycled because they are laminated by heat fusion means without using any adhesive. Moreover, since it heat-seal | fuses so that at least the outer peripheral side area | region of the plate | board surface part of a thermoplastic resin board | plate material may be edged, the intensity | strength of the peripheral part of a laminated body is hold | maintained and there is little damage. Furthermore, in the case of a laminated structure in which an adhesive is used, a gap occurs in the bonded portion due to uneven application of the adhesive, but in the present invention, the materials are reliably heat-sealed and the outer peripheral edge region Since it is heat-sealed so as to frame, water and dust do not enter between the materials. In a laminated structure using a corrugated cardboard plate having a rib structure, the outer peripheral side region of the plate is heat-sealed (sealed) so that the rib structure closes, so that water, dust, dirt, It is hygienic without insects entering, and can be cleaned freely.

  Exemplary embodiments of the present invention will be described with reference to the accompanying drawings. Note that the embodiment shown in the drawings exemplifies a preferred embodiment of the present invention, and the present invention is not interpreted narrowly.

  First, FIG. 1 is a diagram showing a first embodiment of a composite plate material according to the present invention, and FIG. 2 is a diagram showing a second embodiment of the composite plate material according to the present invention.

  In the embodiment shown in FIGS. 1 and 2, two synthetic resin cardboards A and B are used as the plate material. Synthetic resin cardboards A and B are heat-sealable resins, ie, polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyvinylidene chloride, fluororesin, polymethyl methacrylate, polyamide, polyester, polycarbonate, polyphenylene oxide, polyurethane, It is formed of a thermoplastic resin such as polyacetal. A polyolefin resin or a polycarbonate resin is preferable when comprehensively considering ease of molding into a box-shaped body such as a container or a case, strength, and cost.

  The synthetic resin cardboards A and B have a core (rib) structure as indicated by a symbol R. The form of the core structure R is not particularly limited to the honeycomb structure (or harmonica-like structure) as illustrated, and may be, for example, a corrugated sheet structure. The thickness and weight of the synthetic resin cardboards A and B may be appropriately selected according to the purpose. Note that the center intervals between the synthetic resin cardboards A and B may be common as shown in the figure, or may be different.

  Here, referring to FIG. 1, in the embodiment shown in FIG. 1, two synthetic resin cardboards A and B are laminated so that their core directions coincide with each other, It is a board. On the other hand, in the embodiment shown in FIG. 2, two synthetic resin cardboards A and B are laminated so that their core directions are orthogonal to each other, and a composite plate material indicated by reference numeral 2 is formed. In addition, as a combination in the center direction, a configuration (not shown) that crosses diagonally can also be employed.

  The outer peripheral edge side region of the plate surface portion indicated by the symbol X in FIG. 1 and FIG. 2 shows a portion where the synthetic resin is melted by heat fusion processing such as thermocompression processing to become the seal portion S. This heat-sealing process can be performed, for example, by thermally pressing the outer peripheral edge region X from above and below.

  More specifically, synthetic resin cardboards A and B are cut into a predetermined shape and size and then heat-sealed, a method of heat-bonding and then cut into a predetermined shape and size, heat-sealing and cutting It is possible to adopt a method of performing processing simultaneously. In particular, the method of performing the heat fusion process and the cutting process simultaneously exemplified at the end is preferable because it is efficient and contributes to cost reduction.

  Note that the processing conditions for heat sealing are appropriately selected in consideration of the basis weight, thickness, rib structure, and the like of the material to be heat-sealed. What is necessary is just to determine suitably the area | region area of the outer periphery side area | region X in consideration of the use purpose of a board | plate material, the intensity | strength requested | required of a board | plate material, etc. FIG.

  A plate surface portion other than the outer peripheral side region X, for example, a central region of the plate surface may be thermally welded. In particular, when the areas of the cardboards A and B are large, when a strong external force is applied from the cardboard end face side, the cardboards A and B bend in a direction away from each other (swell in the central region of the plate surface). Can be effectively prevented (the same applies to the following embodiments). Moreover, what is necessary is just to select a required number, a shape, a place, etc. for the heat-fusion part for bending prevention.

  FIG. 3 is a diagram showing another embodiment (third embodiment) of the composite plate material according to the present invention.

  In the composite plate material 3 shown in FIG. 3, three synthetic resin cardboards A, B, and C are laminated and integrated. The method of lamination is the same as in the case of the composite plate material 1 shown in FIG. 1 and the composite plate material 2 shown in FIG. That is, the synthetic resin cardboards A and B are thermally welded in the outer peripheral edge side region X of the plate surface, and the synthetic resin cardboards B and C are welded in the thermal outer peripheral side region X of the plate surface (see FIG. 3). In addition, also in embodiment mentioned below, the method of lamination | stacking integration is the same.

  3, the center direction of the synthetic resin cardboard B is orthogonal to the center direction of the synthetic resin cardboard A. Further, the composite plate material 3 of FIG. The synthetic resin corrugated cardboard C is laminated and integrated in an arrangement relationship in which the central direction of the synthetic resin cardboard C is orthogonal to the central direction. Although not shown in the figure, the core directions of the three cardboards A, B, and C are all made to coincide with each other, or only two of the three cardboards are made to coincide with the center direction. Is also free.

  1-3, the code | symbol 1, 2, and 3 shown has shown the composite board | plate material obtained by each heat sealing | fusion process. In these composite plate materials 1, 2, and 3 according to the present invention, a seal portion S having a flat outer peripheral edge portion is formed (see FIGS. 1 to 3). By the seal portion S, the core structure of the cardboards A, B, and C is not exposed to all end faces and is closed. For this reason, water (rain water, etc.), garbage, insects, etc. do not enter and it is hygienic. It is also easy to wash with water.

  In the present invention, the material laminated on the thermoplastic resin plate material such as cardboard is not limited to the same type of cardboard, but a different material, for example, a thin material that does not fall within the concept of a plate material, for example, a film or a sheet May be combined. Also, it may be a material with a solid structure rather than a core structure or hollow structure such as cardboard, and it is free to combine materials mixed with charcoal, metal powder, talc, etc., or different colors is there. In short, various heat-sealable materials can be laminated.

  FIG. 4 is a diagram showing a layer structure before heat-sealing of another embodiment (fourth embodiment) of the composite plate material according to the present invention.

  The composite plate material 4 shown in FIG. 4 is a composite plate material in which a synthetic resin corrugated cardboard A and a board D having a solid structure (without a core structure) are laminated and integrated by the same heat welding as described above. The board D is not particularly limited as long as it is a material that can be laminated and integrated with the synthetic resin cardboard A by heat welding.

  FIG. 5 is a view showing a layer structure before thermal fusion of another embodiment (fifth embodiment) of the composite plate material according to the present invention.

  The composite plate member 5 shown in FIG. 5 has a synthetic resin cardboard A and a synthetic resin board D having a solid structure (without a core structure) laminated and integrated by heat welding similar to the above. The composite plate material has a structure in which a thin synthetic resin film (or sheet) E is bonded to the other plate surface of the synthetic resin cardboard A. That is, the composite plate material 5 has a laminated structure in which a synthetic resin cardboard A is sandwiched between a film (or sheet) E and a synthetic resin board D.

  Note that the film (or sheet) E may be bonded to the composite plate material 5 in order to impart appearance designability or functionality (for example, antistatic properties or antibacterial properties), for example. The method for attaching the film (or sheet) E is not particularly limited.

  FIG. 6 is a view showing a layer structure before heat fusion of another embodiment of the composite plate material according to the present invention (sixth embodiment).

  The composite plate 6 shown in FIG. 6 is a composite plate having a laminated structure in which a nonwoven fabric F formed of a thermoplastic resin is sandwiched between corrugated cardboards A and B made of synthetic resin. In the present embodiment, the corrugated cardboards A and B made of synthetic resin are arranged through the nonwoven fabric F so that the core directions are orthogonal to each other (see FIG. 7).

  The nonwoven fabric F exhibits the function etc. which relieve | moderate the impact added to the composite board | plate material 7, especially the external force from a side surface. Instead of the nonwoven fabric F, a woven fabric, a braided fabric, a mesh-like body, a fiber reinforced resin, or the like may be combined.

  FIG. 7 is a view showing a layer structure before heat-sealing of another embodiment (seventh embodiment) of the composite plate material according to the present invention.

  The composite plate member 7 shown in FIG. 7 has a laminated structure in which a buffer material (for example, an elastic body such as foamed polyurethane) G formed of a thermoplastic resin is sandwiched between corrugated cardboards A and B made of synthetic resin. It is a composite plate material. In the present embodiment, the synthetic resin corrugated cardboards A and B are arranged so that the core directions are orthogonal to each other via the cushioning material G (see FIG. 7). The buffer material G exhibits a function of relaxing the impact applied to the composite plate material 7, particularly the external force from the side surface.

  In addition to the above embodiment, in the present invention, heat-sealable, water-repellent, hydrophilic, oil-repellent, cold storage, adsorptive, magnetic, electromagnetic shielding properties, etc. for heat-sealable sheet materials such as cardboard made of synthetic resin , Materials with physical properties such as colorability, transparency, design, weather resistance, UV shielding, soundproofing, vibration control (or vibration isolation), saltwater resistance, deodorant, antifouling, anchoring It may be used as it is, or a material having physical properties may be newly laminated.

  FIG. 8 is a diagram showing a layer structure before thermal fusion of still another embodiment (eighth embodiment) of the composite plate material according to the present invention.

  In the composite plate material 8 shown in FIG. 8, the synthetic resin corrugated cardboard H in which characters (here, the letters “UNK”) are formed in a predetermined position on the plate surface of the synthetic resin corrugated cardboard A is heated. It is laminated and integrated by fusion.

  In this composite plate member 8, as shown in FIG. 8, in addition to the outer peripheral edge side region X, a region Y that borders the characters “UNK” is also heat-sealed. With this configuration, it is possible to effectively prevent water and dust from entering from the character part “UNK” of the synthetic resin cardboard A.

  As described above, the composite plate materials 1 to 8 can be used as a structure or a protective material as a plate-shaped form, and a crease line or a half cut line is applied, or the composite plate materials 1 to 8 are used as guide members or A desired container or case can be manufactured by connecting with a hinge or the like.

  FIG. 9 is a diagram illustrating an embodiment of a composite plate formed for a container or a case in a 1/2 developed form.

  For example, as shown in FIG. 2, the composite plate material 9 heats the outer peripheral edge Sa and the bent portion Sb of the laminated body in which the cores of the two synthetic resin cardboards A and B are laminated in an orthogonal relationship. It is sealed into a flat shape by fusion and cut into a shape as shown in FIG. 9 (a shape having flaps 91 and 92 and side wall surfaces 93 and 94). In the present invention, in addition to the shape shown in FIG. 9, various shapes depending on the purpose may be heat-sealed and cut, and the combination of the materials of the laminate is also free.

  The composite board | plate material which concerns on this invention can be utilized as a surface material of a structure, a protective material, a container, or a case. In particular, by combining materials with various physical properties and characteristics, plate materials with various functions such as water resistance, heat retention / heat insulation, weather resistance, buffering, antistatic, antibacterial, chemical resistance, etc. Can be provided freely. Examples of fields that can be used include automobile parts, precision equipment, films, transport cases and trays for fresh food, agricultural products, garbage, chemicals, ceramics, various underlay materials and cushioning materials such as automobile parts and flooring floors, Curing materials, display identification plates, design plates, wall materials, ceiling materials, products during transportation, protective materials such as walls, various lid materials such as baths, lighting members for indirect lighting, and the like.

  Since the composite plate material according to the present invention does not use any adhesive, it is particularly useful as a recyclable plate material. Since at least the outer peripheral edge region of the plate surface is heat-sealed, water and dust do not enter through the stacking gap, so that it has excellent durability and can be used as a sanitary plate material.

It is a figure which shows 1st Embodiment of the composite board | plate material which concerns on this invention. It is a figure which shows 2nd Embodiment of the composite board | plate material which concerns on this invention. It is a figure which shows 3rd Embodiment of the composite board | plate material which concerns on this invention. It is a figure which shows the layer structure before the heat sealing | fusion of 4th Embodiment of the composite board | plate material which concerns on this invention. It is a figure which shows the layer structure before the heat sealing | fusion of 5th Embodiment of the composite board | plate material which concerns on this invention. It is a figure which shows the layer structure before the heat sealing | fusion of 6th Embodiment of the composite board | plate material which concerns on this invention. It is a figure which shows the layer structure before the heat sealing | fusion of 7th Embodiment of the composite board | plate material which concerns on this invention. It is a figure which shows the layer structure before the heat sealing | fusion of 8th Embodiment of the composite board | plate material which concerns on this invention. It is a figure which shows one embodiment of the composite board | plate material formed for containers or cases with a 1/2 expansion | deployment form.

Explanation of symbols

1-9 Composite plate materials A, B, C Synthetic resin cardboard D Internal board E Film (or sheet)
F Non-woven fabric G Buffer material H Synthetic resin corrugated cardboard with characters penetrated Outer peripheral edge side region

Claims (6)

  A composite plate material in which the same or different materials are laminated and integrated with the thermoplastic resin plate material by heat-sealing so that at least the outer peripheral side region of the plate surface portion of the thermoplastic resin plate material is trimmed.   The composite plate material according to claim 1, wherein the thermoplastic resin plate material is a thermoplastic resin cardboard. At least two thermoplastic resin cardboards are used,
The composite sheet material according to claim 2, wherein the cores of the thermoplastic resin corrugated cardboard in a face-to-face relationship with a direct or intervening layer interposed therebetween are laminated so that they intersect or intersect each other.   2. The composite plate material according to claim 1, wherein a functional material that adds some physical property to the thermoplastic resin plate material is laminated.   The composite plate material according to claim 1, wherein the thermoplastic resin plate material is a polyolefin resin or a polycarbonate resin.   A box-shaped body comprising the composite plate material according to any one of claims 1 to 5.

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