JP3061462B2 - Manufacturing method of sandwich structure panel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing and processing a sandwich structure panel.

[0002]

2. Description of the Related Art In recent years, building material interior and exterior panels represented by sandwich structure panels have been frequently used for the purpose of weight reduction and heat insulation, and core materials thereof include, for example, paper honeycomb, aluminum honeycomb, plastic foam, wood, A non-woven fabric molded product, a glass wool molded product, a gypsum board, or the like is used, and various surface materials, for example, a metal plate, a plastic plate, a wooden plate, a slate plate, and the like are bonded to both surfaces thereof. Mainly, honeycomb sandwich structure panels are widely used, and are frequently used for door panels, indoor / outdoor partitions, flash panels such as shutters, furniture, blackboards, housings of office equipment, and the like. The adhesive is usually applied to either the core material side or the surface material side or both sides by a roll coater or a spray. As the adhesive used for this, a solvent-type adhesive such as a chloroprene-based adhesive has been typically used, but there is a risk of environmental pollution and fire caused by the solvent. As an adhesive free of these defects, there is a hot melt adhesive mainly composed of an ethylene-vinyl acetate copolymer or a styrene-butadiene-styrene copolymer. However, this adhesive is inherently thermoplastic and has insufficient heat resistance, so its use is limited to indoor use. Therefore, a sandwich structure panel requiring heat resistance such as outdoors is mainly applied directly to a paper honeycomb or a surface material using a room temperature curable epoxy adhesive which is liquid at room temperature, and is further pressed for a long time. A processing method of hardening and curing in a state to obtain a panel product has been widely adopted. However, the current situation has many issues regarding productivity. One of the manufacturing methods typified by flash panels is that the following processing methods are currently used because there is only one kind of core material and a flat material can be used for the face material. An important problem is that the production of a sandwich structure panel having a plurality of core materials typified by a door panel or the like cannot be performed by the following processing method.

Further, as a method for producing a flash panel such as a shutter, for example, a two-component curing type epoxy adhesive is used.
After simultaneous application of the upper and lower surfaces to the core material through a roll coater for double-sided coating, a method of bonding the surface material up and down is adopted, but in this method, when handling the core material after completion of application, Contact contamination of the receiving jig or receiving worker is a major problem. Epoxy adhesives are generally said to be highly irritating to the skin, and there is an inherent danger for workers to develop skin diseases, and handling of cores coated on both sides is complicated and causes contamination. It has become a bottleneck in productivity, including the need for long-term curing curing. As another processing method of the flash panel, a processing method of applying a top coat to the upper and lower surface materials and bonding the core material after sandwiching is partially adopted, but any one of the face materials is used. It is necessary to turn over the sheet as it is after coating, and the line contamination problem in that case is a major problem. Any of the above-mentioned processing methods is currently very difficult to handle without contaminating the coated material, and the main cause of poor productivity in the coating and bonding process due to the complexity and complexity of the apparatus. Has become. In the production of sandwich panels such as door panels, it is essential to use at least two types of core materials, and the shapes of the core materials vary. Is extremely complicated in terms of productivity, and has problems such as contamination of lines. Further, since the surface material to be bonded has a box shape, it is impossible to apply the surface material by a roll coater. In this case, there is a disadvantage that automation cannot be performed. In recent years, reactive hot melt adhesives, mainly moisture-curable hot melt adhesives, have been proposed as adhesives in this field. For example, Japanese Unexamined Patent Publication No. 2-25843 discloses a method for manufacturing a honeycomb sandwich structure panel using a reactivated moisture-curable hot melt adhesive. With the processing method using reactive hot melt adhesive, temporary adhesion can be obtained instantaneously, so it is possible to adopt a processing method that does not require any heat curing curing process represented by conventional epoxy adhesive. And has the feature of improving productivity. Therefore, it is becoming possible to almost solve the basic adhesive curing process for improving productivity, but any of the current manufacturing methods can be applied to a plurality of types of sandwich structure panels in a single manufacturing process. At present, there is a major problem that cannot be manufactured. Therefore, in this field, there is a strong demand for a method of manufacturing a sandwich structure panel, which is a multi-purpose, line-saving, high-productivity, labor-saving processing method.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a multi-purpose sandwich panel having a variety of product configurations, to achieve high productivity on the same line for a variety of purposes, and to reduce the complexity of coating and post-coating processes. It is intended to provide a production processing method in which production and line contamination are extremely reduced.

[0005]

That is, the present invention is as follows. (A) In the production of a sandwich structure panel in which one or two or more types of core material and a surface material are adhered to the top and bottom thereof, the following steps (A) to (H) are performed using one overcoat roll coater. A method for manufacturing a sandwich-structured panel, characterized in that the panel is manufactured according to the following procedure. (A) Prepare a guide plate adjusted so that the same thickness as the surface material or the total thickness of the core material to which the one-side surface material is joined, and the thickness after the core material setting is the same, and put on the guide plate A core material setting process for setting the core material. (B) An adhesive application step in which the core material set on the guide plate is passed through a top coat roll coater of the adhesive as it is to apply one upper surface of the core material. (C) a bonding step of bonding the first surface material to the application surface. (D) A reversal transfer step in which the material is conveyed and moved to the (A) step after the reversal operation. (E) A recoating setting step of removing the guide plate during the step (D) or immediately after the step (D). (F) An adhesive application step of applying the upper surface of the core material again on the same line as the step (B). (G) A bonding step of bonding the second surface material to the application surface. (H) An ornamental packaging process in which products are shipped after the end face ornamental treatment of the bonded panel is performed. (B) In the production of a sandwich structure panel in which one or more core materials and a surface material are adhered to the upper and lower surfaces thereof, the following steps (I) to (P) are performed using two overcoat roll coaters. A method for manufacturing a sandwich-structured panel, characterized in that the panel is manufactured according to the following procedure. (I) Prepare a guide plate adjusted to have the same thickness as the surface material or the total thickness of the core material to which the one-side surface material is joined, and the thickness after setting the core material, and put on the guide plate A core material setting process for setting the core material. (J) An adhesive application step in which the core material set on the guide plate is passed through an adhesive top-coating roll coater as it is to apply one upper surface of the core material. (K) a bonding step of bonding the first surface material to the application surface. (L) A reversal transfer step of transporting the material as it is after the reversal operation. (M) A recoating setting step of removing the guide plate during the (L) step or immediately after the end of the (L) step. (N) An adhesive application step of passing through a second top coat roll coater and applying the other upper surface of the core material. (O) A bonding step of bonding the second surface material to the application surface. (P) An ornamental packaging step of shipping the product after the end face ornamental treatment of the bonded panel. (C) The method for manufacturing a sandwich-structured panel according to the above (a) or (b), wherein the guide plate is a coated steel plate or a laminated steel plate having a high adhesive release property. (D) The method for manufacturing a sandwich structure panel according to the above (a) or (b), wherein the guide plate is any one of the upper and lower surface materials. (E) the guide plate is any one of the upper and lower surface materials and after the reversing operation of the (D) or (L) step, or after the (D) or (L) step, (G) or The process for producing a sandwich-structured panel according to the above (a) or (b), wherein the guide plate is used as a surface material in the step (O). (F) The guide plate is provided with pins or irregularities for defining the set position of the core material in advance, and the sandwich structure panel according to any one of (a) to (c) above, is manufactured. Method. (G) The process for producing a sandwich-structured panel according to any one of (a) to (f) above, wherein the adhesive is a moisture-curable reactive hot melt adhesive of an initial tackiness type or a reactivation type. Method. (H) The method for manufacturing a sandwich-structured panel according to any one of (a) to (f) above, wherein the adhesive is a hot melt adhesive. (I) The adhesive according to the above (a) to (d), wherein the adhesive is an epoxy adhesive or a urethane adhesive which is liquid at room temperature.
(F) The method for manufacturing a sandwich-structured panel according to any one of the above. (U) The core material is paper honeycomb, aluminum honeycomb,
Any one of the above-mentioned (a) to (i), which is one or more selected from the group consisting of plastic foam, wood, steel, non-woven fabric molded product, glass wool molded product, and gypsum board Manufacturing method of sandwich structure panel. (R) The method for manufacturing a sandwich structure panel according to any one of (A) to (N), wherein the sandwich structure panel is a building material flash panel, a building material door panel, or an indoor / outdoor partition.

Hereinafter, the present invention will be described in detail.
As the guide plate used in the present invention, it is desirable to use a steel plate whose surface has been subjected to a release treatment so that the adhesive can easily be removed when it adheres to the plate. It is also useful to use a pin or a plate provided with irregularities for defining the setting position of the core material in advance. Furthermore,
It is also possible to use any one of the upper and lower surface materials as a guide plate. Examples of the adhesive used in the present invention include a moisture-curable reactive hot melt adhesive, a hot melt adhesive, an epoxy adhesive or a urethane adhesive which is liquid at room temperature. The productivity of hot melt adhesives can be improved due to their rapid solidification, but their use is limited to indoor sandwich panels and the like due to insufficient heat resistance. Epoxy adhesives or urethane adhesives that are liquid at room temperature can be widely applied irrespective of indoor and outdoor use due to their good heat resistance, but are inferior in productivity because they require long-term curing curing. The moisture-curable reactive hommelt adhesive is particularly preferably used because it has both productivity and heat resistance. Examples of the moisture-curable reactive hommelt adhesive used in the present invention include polyisocyanate compounds (diphenylmethane diisocyanate, hydrogenated diphenylmethane diisocyanate, tolylene diisocyanate, hydrogenated tolylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, naphthalene diisocyanate, Methylene polyphenyl polyisocyanate, xylene diisocyanate, etc.) and a polyol having one or more, preferably two to three active hydrogens in one molecule (polyether polyol, polyester polyol, polycarbonate polyol, polybutadiene polyol, hydrogenated polybutadiene polyol, Polyisoprene polyol, hydrogenated polyisoprene polyol, polyacrylate polyol, castor And the like. Also, the urethane prepolymer obtained by reacting these under heating at 80 to 130 ° C. for several hours, while appropriately selecting one or more physical properties for setting one or more of the derivatives, etc.). Polymer as a main component. Usually, the polyisocyanate compound and the polyol are reacted so that the NCO group / OH group equivalent ratio is in the range of 1.4 to 5.0, and the resulting isocyanate ratio is set so as to be 0.1 to 10% by weight. .

If necessary, a conventional compounding agent such as a thermoplastic polymer (eg, an ethylene-based copolymer such as polyester, polyurethane, or ethylene-vinyl acetate copolymer);
Styrene-based block copolymers such as styrene-butadiene-styrene block copolymers, styrene- (meth) acrylic acid alkyl ester graft copolymers and the like, tackifying resins (rosin and its derivatives, ketone resins, cumarone resins, Styrene resin, terpene resin, terpene phenol resin, petroleum resin and its hydrogenated resin, etc., wax (paraffin wax, microcrystalline wax, polyethylene wax, etc.), plasticizer (phthalic acid esters such as dioctyl phthalate), liquid polybutene, naphthene Oil, paraffin oil, aroma oil, diethylene glycol dibenzoate, chlorinated paraffin, epoxy plasticizer, phosphate esters, etc.), filler (calcium carbonate, clay, talc, etc.), pigment, curing accelerator (dibutyl) Tin compounds such Njiraureto,
An amine compound such as 1,3-dimethylimidazolidinone), an interface modifier (such as a silane compound), an organic thixotropy-imparting agent, an antioxidant, and an ultraviolet absorber are blended. Other than the above, the moisture-curable reactive hommelt adhesive used in the present invention includes a monomer having a vinyl group and an isocyanate group (m-isopropenyl-
α, α′-dimethylbenzyl isocyanate, 2-methacryloyloxymethyl isocyanate, etc.) using a peroxide or the like under heating to obtain a thermoplastic polymer substantially free of active hydrogen (ethylene such as ethylene-vinyl acetate copolymer) Block copolymer, styrene block copolymer such as styrene-butadiene-styrene block copolymer, styrene-alkyl (meth) acrylate graft copolymer, etc.) and / or tackifying resin (petroleum resin and the like) Hydrogenated resins, terpene resins and their hydrogenated resins)
A polymer produced by graft polymerization to, or a monomer having a vinyl group and an isocyanate group in the molecule and a polystyrene-based macromer having a vinyl group at the molecular end,
The main component is a polymer produced by copolymerizing with one or more selected from the group consisting of vinyl acetate and alkyl (meth) acrylate. If necessary,
Conventional compounding agents, for example, the tackifying resin, the wax, the filler, the curing accelerator, the interface modifier,
It is composed of a system in which an organic thixotropy agent, an antioxidant, an ultraviolet absorber and the like are blended.

[0008]

EXAMPLES The present invention will be specifically described below with reference to examples, but these descriptions do not particularly limit the present invention. In addition,% and part described in each production example mean% by weight and part by weight, respectively. (Preparation of Moisture-Curing Reactive Hot Melt Adhesive) Production Example 1 Diphenylmethane diisocyanate as a polyisocyanate compound and polybutadiene diol (PBG-2000, manufactured by Nippon Soda Co., Ltd.) as a polyol were used in NCO /
The mixture was reacted at 100 ° C. for 5 hours while mixing and stirring at an OH equivalent ratio of 2.0 to obtain a urethane prepolymer. With respect to 100 parts of the urethane prepolymer, an ethylene-vinyl acetate copolymer (Evaflex 22) was used as a thermoplastic polymer.
0, 30 parts by Du Pont-Mitsui Polychemicals Co., Ltd., and a rosin derivative (Superester A-1) as a tackifying resin
00, manufactured by Arakawa Chemical Co., Ltd.)
An adhesive was obtained. (Preparation of Moisture-Curing Reactive Hot Melt Adhesive) Production Example 2 As a solvent, in 40 parts of xylene, 70 parts of 2-ethylhexyl acrylate, 10 parts of methyl methacrylate, and a polystyrene macromer (CHEMLINK 4500, S
ARTOMER) 20 parts, m-isopropenyl-
3 parts of α, α′-dimethylbenzyl isocyanate (manufactured by ACC) and 0.2 part of t-hexylperoxypivalate were added, and the mixture was polymerized at a reaction temperature of 80 ° C. for 5 hours to prepare a graft polymer solution. On the other hand, xylene 1
In 00 parts, 50 parts of n-butyl acrylate, 50 parts of ethyl acrylate, 10 parts of m-isopropenyl-α, α'-dimethylbenzyl isocyanate (manufactured by ACC) and 10 parts of benzoyl peroxide were added, and the reaction was carried out. Temperature 100
Polymerization was performed at 5 ° C. for 5 hours to prepare a low molecular weight polymer solution. Further, diphenylmethane diisocyanate and polyester polyol (Kurapol P-2010, manufactured by Kuraray Co., Ltd.)
The mixture was reacted at 100 ° C. for 5 hours while mixing and stirring at a CO / OH equivalent ratio of 2.0 to obtain a urethane prepolymer. 70 parts of the above graft polymer solution, the above low molecular weight polymer solution 2
20 parts of the urethane prepolymer and 100 parts of the urethane prepolymer were melt-mixed and dexylene-treated to prepare an adhesive. (Adjustment of Hot Melt Adhesive) Production Example 3 Ethylene-vinyl acetate copolymer (Evaflex 22)
0, 40 parts of Mitsui-Dupont Polychemical Co., Ltd., rosin derivative (Super Ester A-100, Arakawa Chemical Co., Ltd.)
Forty parts and 20 parts of polyethylene wax (Neowax L, manufactured by Yasuhara Chemical Co., Ltd.) were melt-kneaded at 160 ° C. to obtain an adhesive.

Example 1 A paper honeycomb (25 mm thick, 900 m wide) was used as a core material.
m, length 1800mm) to guide plate (Steel processed surface steel plate, thickness 0.3mm, width 900mm, length 180)
0 mm) (Step A), and the adhesive of Production Example 1 is applied to one side of the paper honeycomb as it is at 120 ° C. with 50 g / m ² using a top coat roll coater (Step B). Immediately after coating, the first surface material is a color steel plate (having a thickness of 0.1 mm).
3 mm, width 900 mm, length 1800 mm) are pressed by a free roll (step C), and after the reversing operation (step D), the guide plate is removed (step E). Again using the above-mentioned top coat roll coater, apply adhesive to the other side of the paper honeycomb
0 g / m ^{2 is} applied (Step F). Immediately after the application, the second surface material, a color steel sheet, was pressed with a free roll, and then heated and pressed at a pressure of 0.5 kg / cm ² for 60 seconds with a press adjusted to 80 ° C., and immediately thereafter. The mixture was pressurized at a pressure of 0.5 kg / cm ² for 60 seconds with a press through which cooling water was passed, and cooled (Step G). Thereafter, the panel was subjected to an end face decoration process, and then the product was shipped (H step). No problems occurred during production. Example 2 A phenol-impregnated paper honeycomb (thickness 25) was used as a core material.
mm, width 800 mm, length 1700 mm) and four wooden frames (thickness 25 mm, width 50 mm, length 1800 mm, two thickness 25
mm, width 50mm, length 800mm two) guide plate (steel plate with fluorine processing on the surface and unevenness to define the setting position of the core material, thickness 1mm, width 900mm, length 1800)
mm), and 50 g of the adhesive of Production Example 2 was applied to one side of the core material at 120 ° C. using a top coat roll coater.
/ M ² is applied. Immediately after the application, the first surface material, an aluminum plate (thickness 1 mm, width 900 mm, length 1800 mm) is pressure-bonded with a free roll, and after the reversing operation, the guide plate is removed. The adhesive is applied to the other surface of the core material at 50 g / m ² again using the above-mentioned top coat roll coater. Immediately after the application, a second aluminum plate as a surface material was pressure-bonded with a free roll, and then pressurized at a pressure of 0.5 kg / cm ² for 20 seconds with a press passing cooling water to cool. Thereafter, the panel was subjected to an end face decoration process, and then shipped. No problems occurred during production.

Example 3 An aluminum honeycomb (25 mm thick, 900 mm wide, 1800 mm long) as a core material was set on the guide plate using a coated steel plate as a second surface material as a guide plate. The adhesive of Production Example 3 is applied on one side at 150 ° C. using a top coat roll coater at 100 g / m ² . Immediately after application, the first surface material, a coated steel plate (thickness 0.3
mm, width 900 mm, length 1800 mm) with a free roll, and after the reversing operation, remove the guide plate which is the second coated steel plate. Using the top coat roll coater again, an adhesive is applied at 100 g / m ² to the other surface of the aluminum honeycomb. Immediately after the application, the guide plate, which is the second coated steel plate, was pressure-bonded with a free roll, and then heated and pressed with a press adjusted to 80 ° C. at a pressure of 0.5 kg / cm ² for 60 seconds.
Immediately afterwards, with a press passing cooling water, 0.5 kg / cm ²
And then cooled for 60 seconds. Thereafter, the panel was subjected to an end face decoration process, and then shipped. No problems occurred during production. Example 4 A plastic foam (thickness 25 mm, width 800) was used as a core material.
mm, length 1700 mm) and one steel frame (thickness 25 mm, width 900 mm, length 1800 mm) with a guide plate (steel plate whose surface is treated with fluorine, thickness 0.3 mm, width 900 mm, length 1)
800 mm), and using a top coat roll coater on one side of the core material as it is, 100 g of Structbond 1202F (manufactured by Mitsui Toatsu Chemicals) as an epoxy adhesive.
/ M ² is applied. Immediately after application, the first surface material is a painted steel plate (thickness 0.3 mm, width 900 mm, length 1800 mm)
Is pressed with a free roll, and after the reversing operation, the guide plate is removed. Using the above-mentioned top coat roll coater, an adhesive is applied to the other surface of the core material at 100 g / m ² . Immediately after the coating, the coated steel sheet as the second surface material was pressure-bonded with a free roll, and then 0.5 kg with a press adjusted to 40 ° C.
/ Cm ² for 6 hours. Thereafter, the panel was subjected to an end face decoration process, and then shipped. Except for a long heating and pressurizing time, no problem occurred in production. Example 5 A glass wool molded body (thickness 25 mm, width 800
mm, length 1700mm) and 4 wooden frames (thickness 25mm, width 50mm, 2 length 1800mm, thickness 25mm, width 50m)
m, two 800 mm lengths) is set on a guide plate (a steel plate whose surface is made of fluorine and has irregularities for defining the setting position of the core material, thickness 0.3 mm, width 900 mm, length 1800 mm). Then, 50 g / m ² of the adhesive of Production Example 2 is applied on one surface of the core material at 120 ° C. using a top coat roll coater. Immediately after application, the first sheet material, a box-shaped steel plate (thickness 0.3 mm, width 900 mm, length 180)
0mm) with a free roll, and after the reversing operation, remove the guide plate. Again using the above top coat roll coater,
An adhesive is applied to the other surface of the core material at 50 g / m ² . Immediately after coating, the second steel sheet, a surface material, was pressed with a free roll and then pressed with cooling water at a pressure of 0.5 kg / cm.
^It was pressurized at a pressure of ² for 20 seconds and cooled. Thereafter, the panel was subjected to an end face decoration process, and then shipped. No problems occurred during production.

Example 6 A paper honeycomb (25 mm thick, 900 m wide) was used as a core material.
m, length 1800mm) to guide plate (Steel processed surface steel plate, thickness 0.3mm, width 900mm, length 180)
0 mm) (Step I), and the adhesive of Production Example 1 is applied on one side of the paper honeycomb at 120 ° C. with 50 g / m ² using a top coat roll coater (Step J). Immediately after application, the first surface material, a color steel plate (thickness 0.3 mm, width 900 mm, length 1800 mm), is pressure-bonded with a free roll (K step), and after the reversing operation (L step), Remove (M step). An adhesive is applied at 50 g / m ² to the other surface of the paper honeycomb using a second top coat roll coater (N step). Immediately after application, 2
The color steel plate as the first surface material was pressed with a free roll and then pressed at 80 ° C. with a press adjusted to 0.5 kg / cm ^2.
And then immediately pressurized at a pressure of 0.5 kg / cm ² for 60 seconds with a press through cooling water (Step O). Thereafter, the panel was subjected to an end face decoration process, and then the product was shipped (P process). No problems occurred during production. Example 7 A phenol-impregnated paper honeycomb (thickness 25) was used as a core material.
mm, width 800 mm, length 1700 mm) and four wooden frames (thickness 25 mm, width 50 mm, length 1800 mm, two thickness 25
mm, width 50mm, length 800mm two) guide plate (steel plate with fluorine processing on the surface and unevenness to define the setting position of the core material, thickness 1mm, width 900mm, length 1800)
mm), and 50 g of the adhesive of Production Example 2 was applied to one side of the core material at 120 ° C. using a top coat roll coater.
/ M ² is applied. Immediately after the application, the first surface material, an aluminum plate (thickness 1 mm, width 900 mm, length 1800 mm) is pressure-bonded with a free roll, and after the reversing operation, the guide plate is removed. Using a second top coat roll coater, an adhesive is applied to the other surface of the core material at 50 g / m ² . Immediately after the application, a second aluminum plate as a surface material was pressure-bonded with a free roll, and then pressurized at a pressure of 0.5 kg / cm ² for 20 seconds with a press passing cooling water to cool. Thereafter, the panel was subjected to an end face decoration process, and then shipped. No problems occurred during production.

Example 8 A coated steel plate as a second surface material is used as a guide plate,
Aluminum honeycomb (25mm thick, 900mm wide, long
1800mm) is set on the guide plate.
Manufactured using a top coat roll coater on one side of the honeycomb
100 g / m at 150 ° C. of the adhesive of Example 3^TwoApply. Application
Immediately afterwards, the first surface material, painted steel plate (thickness 0.3
mm, width 900mm, length 1800mm) by free roll
After crimping and reversing operation, remove the second painted steel sheet guide plate.
remove. Using a second top coat roll coater,
100g / m of adhesive on the other side of Lumi Honeycomb^TwoPaint
Cloth. Immediately after application, the second painted steel guide plate
Was pressed with a free roll, and then adjusted to 80 ° C.
0.5kg / cm with press^TwoHeating and pressurizing at a pressure of 60 seconds,
Immediately afterwards, press with cooling water 0.5kg / cm ^Twoof
It was pressurized with pressure for 60 seconds and cooled. Then, the end face of the panel
After performing the dressing process, the product was shipped. Any problems in manufacturing
Did not occur. Example 9 A plastic foam (thickness 25 mm, width 800) was used as a core material.
mm, length 1700mm) and one steel frame (thickness 25mm, width)
900mm, length 1800mm) guide plate (fluoridation on the surface)
Engineered steel plate, thickness 0.3mm, width 900mm, length 1
800mm), and then overcoat one side of the core
Using an epoxy-based adhesive.
100g of ECT Bond 1202F (Mitsui Toatsu Chemicals)
/ M^TwoApply. Immediately after coating, the first surface material, coating
Steel plate (thickness 0.3mm, width 900mm, length 1800mm)
With a free roll, remove the guide plate after the reversal operation,
except. Using a second top coat roll coater,
On the other side, apply 100 g / m of adhesive^TwoApply. Application
Immediately afterwards, free-roll the painted steel plate as the second surface material.
With a press adjusted to 40 ° C.
/cm^TwoFor 6 hours. Then on the panel
The product was shipped after the end face dressing process. Heating and pressurizing time
Except for a long time, no problem occurred in production. Example 10 A glass wool molded body (thickness 25 mm, width 800
mm, length 1700mm) and 4 wooden frames (25mm thick, width)
50mm, length 1800mm, 2 pieces, thickness 25mm, width 50m
m, length 800mm 2) guide plate (fluorine processing on the surface)
And irregularities to define the setting position of the core material
Steel plate, thickness 0.3mm, width 900mm, length 1800mm)
Set, and as it is, a top coat roll coater on one side of the core material
Of the adhesive of Production Example 2 at 120 ° C. using 50 g / m 2^TwoPaint
Cloth. Immediately after application, it is added to the first surface material, box shape.
Engineered steel plate (thickness 0.3mm, width 900mm, length 180
0mm) with a free roll, and after the reversing operation, guide plate
Get rid of. Using a second top coat roll coater,
50g / m of adhesive on the other side of the core^TwoApply. Paint
Immediately after the cloth, free roll the steel sheet as the second surface material
At 0.5kg / cm
^TwoPressure for 20 seconds and cooled. Then on the panel
The product was shipped after the end face dressing process. Any questions on manufacturing
The title did not occur.

Comparative Example 1 The core material and the surface material used in Example 2 were bonded without using a guide plate. Adhesive cannot be applied to the phenol-impregnated paper honeycomb and four wooden frames at the same time, and the core material must be set at a predetermined position on the surface material after application, resulting in poor productivity and poor adhesion. Troubles associated with the contamination of the line by the agent frequently occurred. Comparative Example 2 The core material and the surface material used in Example 3 were bonded without using the guide plate. After applying the adhesive to the aluminum honeycomb, the honeycomb was grasped with a predetermined jig and transferred to the coated steel plate, but the adhesive was severely attached to the jig, the line often stopped, and it took time to clean it . Comparative Example 3 The core material and the surface material used in Example 7 were bonded without using the guide plate. Adhesive cannot be applied to the phenol-impregnated paper honeycomb and four wooden frames at the same time, and the core material must be set at a predetermined position on the surface material after application, resulting in poor productivity and poor adhesion. Troubles associated with the contamination of the line by the agent frequently occurred. Comparative Example 4 The core material and the surface material used in Example 8 were bonded without using the guide plate. After applying the adhesive to the aluminum honeycomb, the honeycomb was grasped with a predetermined jig and transferred to the coated steel plate, but the adhesive was severely attached to the jig, the line often stopped, and it took time to clean it .

[0014]

As described above, the method for manufacturing a sandwich structure panel according to the present invention is different from the conventional manufacturing method in that a guide plate (one of the upper and lower surface materials is used as a guide plate). By using)
When manufacturing sandwich structure panels with various product configurations, high productivity can be obtained on the same line for multiple purposes,
The effect of the present invention is extremely large because the process is complicated and line contamination is very small after coating and after coating. In addition, in the case of a manufacturing method that requires only one top coat roll coater, there is an advantage that the capital investment cost can be reduced,
When two top coat roll coaters are used, higher productivity can be achieved.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing a core material setting step (A or I step) of setting a core material on a guide plate according to the present invention.

FIG. 2 is a schematic explanatory view showing an adhesive application step (B or J step) of applying an adhesive to one upper surface of a core material using a top coat roll coater according to the present invention.

FIG. 3 is a schematic explanatory view showing a bonding step (C or K step) of bonding a first surface material to an application surface according to the present invention.

FIG. 4 is a schematic explanatory view showing a reversal operation step after the end of the step (C) or (K) according to the present invention.

FIG. 5 is a schematic explanatory view showing a step of removing the guide plate during the step (D) or (L) or immediately after the step (D) or (L) according to the present invention.

FIG. 6 shows an adhesive for applying an adhesive to one upper surface of another upper surface of a core material using the same overcoat roll coater as in step (B) again according to the present invention or using a second overcoat roll coater. FIG. 4 is a schematic explanatory view showing a coating step (F or N step).

FIG. 7 is a schematic explanatory view showing a bonding step (G or O step) of bonding a second surface material to an application surface according to the present invention.

FIG. 8 is a schematic explanatory view showing the end of the bonding step (G or O step) and before the false packaging step according to the present invention.

FIG. 9 is a schematic explanatory view showing a flow of a method of manufacturing and processing a sandwich structure panel using one overcoat roll coater according to the present invention.

FIG. 10 is a schematic explanatory view showing a flow of a method for manufacturing and processing a sandwich structure panel using two overcoat roll coaters according to the present invention.

[Explanation of symbols]

1 core material (wood frame) 2 core material (honeycomb) 3 guide plate 4 overcoat roll coater 5 adhesive 6 first surface material 7 second surface material

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FIB29L 9:00 (56) References JP-A-2-57329 (JP, A) JP-B-63-39419 (JP, B2) ( 58) Field surveyed (Int.Cl. ⁷ , DB name) B32B 31/12 B29C 65/78 B32B 3/12

Claims (11)

(57) [Claims] When producing a sandwich-structured panel in which one or two or more types of core material and surface materials are adhered to the upper and lower surfaces thereof, the following (A) to (H) are applied using one overcoat roll coater. A) a method for manufacturing a sandwich-structured panel, wherein the panel is manufactured according to the procedure shown in the step. (A) Prepare a guide plate adjusted so that the same thickness as the surface material or the total thickness of the core material to which the one-side surface material is joined, and the thickness after the core material setting is the same, and put on the guide plate A core material setting process for setting the core material. (B) An adhesive application step in which the core material set on the guide plate is passed through a top coat roll coater of the adhesive as it is to apply one upper surface of the core material. (C) a bonding step of bonding the first surface material to the application surface. (D) A reversal transfer step in which the material is conveyed and moved to the (A) step after the reversal operation. (E) A recoating setting step of removing the guide plate during the step (D) or immediately after the step (D). (F) An adhesive application step of applying the upper surface of the core material again on the same line as the step (B). (G) A bonding step of bonding the second surface material to the application surface. (H) An ornamental packaging process in which products are shipped after the end face ornamental treatment of the bonded panel is performed. 2. In the production of a sandwich-structured panel in which one or two or more types of core material and a surface material are adhered to the upper and lower surfaces thereof, the following (I) to (P) A) a method for manufacturing a sandwich-structured panel, wherein the panel is manufactured according to the procedure shown in the step. (I) Prepare a guide plate adjusted to have the same thickness as the surface material or the total thickness of the core material to which the one-side surface material is joined, and the thickness after setting the core material, and put on the guide plate A core material setting process for setting the core material. (J) An adhesive application step in which the core material set on the guide plate is passed through an adhesive top-coating roll coater as it is to apply one upper surface of the core material. (K) a bonding step of bonding the first surface material to the application surface. (L) A reversal transfer step of transporting the material as it is after the reversal operation. (M) A recoating setting step of removing the guide plate during the (L) step or immediately after the end of the (L) step. (N) An adhesive application step of passing through a second top coat roll coater and applying the other upper surface of the core material. (O) A bonding step of bonding the second surface material to the application surface. (P) An ornamental packaging step of shipping the product after the end face ornamental treatment of the bonded panel. 3. The guide plate according to claim 1, wherein the guide plate is a coated steel plate or a laminated steel plate having a high adhesive release property.
Or the method of manufacturing a sandwich-structured panel according to 2. 4. The method according to claim 1, wherein the guide plate is one of upper and lower surface members. 5. The method according to claim 5, wherein the guide plate is one of the upper and lower surface materials and after the reversing operation of the step (D) or (L) or after the step (D) or (L). G)
3. The method according to claim 1, wherein the guide plate is used as a surface material in the step (O). 6. The method for manufacturing a sandwich structure panel according to claim 1, wherein the guide plate is provided with pins or irregularities for defining a set position of the core material in advance. . 7. The method for producing a sandwich structure panel according to claim 1, wherein the adhesive is a moisture-curable reactive hot melt adhesive of an initial tackiness type or a reactivation type. . 8. The method for manufacturing a sandwich-structured panel according to claim 1, wherein the adhesive is a hot melt adhesive. 9. The method according to claim 1, wherein the adhesive is an epoxy adhesive or a urethane adhesive which is liquid at room temperature. 10. The core material is one or more selected from the group consisting of paper honeycomb, aluminum honeycomb, plastic foam, wood, steel, nonwoven fabric, glass wool, and gypsum board. Claims 1 to 9
A method for manufacturing a sandwich-structured panel according to any of the preceding claims. 11. The method according to claim 1, wherein the sandwich structure panel is a building material flash panel, a building material door panel, or an indoor / outdoor partition.