JP2014237281A - Honeycomb sandwich panel, method of producing honeycomb sandwich panel and elevator car using the honeycomb sandwich panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a honeycomb sandwich panel which secures adhesion strength and durability and facilitates management and a method of producing a honeycomb sandwich panel.SOLUTION: A honeycomb sandwich panel includes a honeycomb (1) consisting of an aggregate of cells and a pair of surface sheets (2, 3) arranged so as to sandwich the honeycomb. The honeycomb is applied with a rust preventive oil (12), and the surface sheets are applied with an adhesive (11) in places to be adhered to the honeycomb. The honeycomb applied with the rust preventive oil and the surface sheets applied with the adhesive are fixed through adhesion in such a way that the adhesive and the rust preventive oil come in contact with each other.

Description

  The present invention relates to a honeycomb sandwich panel formed by joining an aluminum honeycomb and a flat plate with an adhesive, which is used as a lightweight and high-rigidity component constituting an electric device such as an elevator. The present invention relates to a honeycomb sandwich panel excellent in adhesiveness and a method for manufacturing a honeycomb sandwich panel.

  Aluminum honeycomb is lightweight and highly rigid when bonded to a surface plate to form a sandwich panel. Therefore, such a honeycomb sandwich panel can be widely used as a part for forming a structure including an elevator part.

  Products using honeycomb sandwich panels are widely used even in elevator parts alone, in cold climates in Japan, and in humid and humid environments in subtropical areas. Unless the honeycomb sandwich panel has a completely airtight structure, it is difficult to eliminate the influence of moisture on the entire structure over time. Honeycomb sandwich panels have vents, but are essentially closed, so not only do condensation in the interior of a humid environment or temperature changes, cause adhesion deterioration. There is a risk of corroding the aluminum honeycomb itself.

  In order to improve the corrosion resistance inside the sandwich panel using an aluminum honeycomb, measures are taken by a method of adding a component that suppresses corrosion to the adhesive itself, or a method of performing a surface treatment of the honeycomb itself (for example, Patent Documents). 1 and 2).

  More specifically, Patent Document 1 has a structure in which a core in which aromatic sulfonic acid is foam-filled between aluminum cells is sandwiched between face plates, and foaming and contact with the core are performed simultaneously under pressure and heating. ing. The corrosion of the aluminum honeycomb is suppressed by the action of the aromatic sulfonic acid used as a phenol resin curing catalyst.

  In Patent Document 2, an aluminum honeycomb anodized with phosphoric acid is treated with a treatment liquid containing an alkali metal hexafluorozirconate salt.

JP-A-62-059027 JP 2008-530362 A

However, the prior art has the following problems.
In Patent Document 1, since a foamed resin is used, there is a limit to applying the resin when the height of the honeycomb becomes high. Moreover, since many resins are used, it is not necessarily good in terms of environment.

  In Patent Document 2, it is necessary to accurately perform anodization and fluoride management. For this reason, it is necessary to manage chemical fluctuations in order to stabilize the quality, and there is a danger in the work, and it is necessary to prepare large-scale equipment for implementation at the manufacturing and assembly site. Is hard to say.

  The present invention has been made to solve the above-described problems, and has an object to obtain a honeycomb sandwich panel that secures adhesive strength and durability and is easy to manufacture and a method for manufacturing the honeycomb sandwich panel. And

  A honeycomb sandwich panel according to the present invention is a honeycomb sandwich panel configured to include a honeycomb that is an aggregate of cells and a pair of surface plates arranged so as to sandwich the honeycomb. The pair of surface plates are coated with an adhesive at a position where they are bonded to the honeycomb, and the honeycomb coated with the rust preventive oil and the pair of surface plates coated with the adhesive are adhesive. And the rust preventive oil are in contact and fixed.

  A method for manufacturing a honeycomb sandwich panel according to the present invention is a method for manufacturing a honeycomb sandwich panel including a honeycomb and a pair of surface plates arranged so as to sandwich the honeycomb, and applying rust preventive oil to the honeycomb. A first step, a second step of applying an adhesive at a position of the pair of surface plates to be bonded to the honeycomb, a honeycomb coated with rust preventive oil in the first step, and an adhesive applied in the second step And a third step of bonding and fixing the pair of surface plates so that the adhesive and the rust preventive oil are in contact with each other.

  According to the present invention, the honeycomb structure is fixed with a pair of surface plates and an adhesive in a state where the honeycomb is coated with rust preventive oil. Therefore, even if the honeycomb portion inside the sandwich panel is exposed to corrosion factors such as moisture, condensation, and salt, it becomes strong against corrosion. Further, since the adhesive is mixed so that the rust preventive oil has little influence on the decrease in the adhesive strength and the rust preventive property is not deteriorated, the adhesive strength itself can obtain a stable strength. As a result, it is possible to obtain a honeycomb sandwich panel and a method for manufacturing a honeycomb sandwich panel that can secure adhesive strength and durability and can be easily managed.

It is sectional drawing which shows the structure of the honeycomb sandwich panel in Embodiment 1 of this invention. It is sectional drawing which shows another structure of the honeycomb sandwich panel in Embodiment 1 of this invention. In the honeycomb sandwich panel according to Embodiment 1 of the present invention, it is a diagram showing the shape of the comb iron used to spread the adhesive.

  Hereinafter, preferred embodiments of a honeycomb sandwich panel of the present invention and a method for manufacturing the honeycomb sandwich panel will be described with reference to the drawings.

Embodiment 1 FIG.
FIG. 1 is a cross-sectional view showing a configuration of a honeycomb sandwich panel according to Embodiment 1 of the present invention. The honeycomb sandwich panel according to the first embodiment shown in FIG. 1 includes a honeycomb 1 and a pair of surface plates 2 arranged so as to sandwich the honeycomb, and the honeycomb 1 and a pair of surface plates 2, 3 ( Each of the upper surface plate 2 and the lower surface plate 3 is bonded and fixed by an adhesive 11. And the rust preventive oil 12 which provides corrosion resistance is apply | coated to the surface of the honeycomb 1.

  Here, the rust preventive oil 12 needs to be a mineral oil or a synthetic oil having a viscosity at 25 ° C. of 1 mPa · s to 150 mPa · s.

  In the present invention, since aluminum itself has a passivating film, the anticorrosive property of the rust preventive oil 12 is an auxiliary role of the passivating film, unlike the anticorrosion of iron. For this reason, if it has the meaning which suppresses a corrosion current, improvement in corrosion resistance can be expected. Therefore, any oil can be used as the rust preventive oil 12 as long as the viscosity satisfies the adhesion and aluminum corrosion resistance assisting effects.

  Specifically, heat medium oils, cleaning agent oils, chemical manufacturing process oils, electrical insulating oils, vacuum pump oils, hydraulic fluids, compressor oils, etc. that are not essentially intended for rust prevention are also included in the present invention. The rust preventive oil 12 can be applied. Even if it is a non-synthetic oil or mineral oil, even if it is a fluorine-containing oil or a silicone oil, it should have a practical strength while being in contact with and compatible with the adhesive 11. .

  Desirable oil materials include mineral oils. As the rust preventive oil 12, rust preventive additives (for example, oil-soluble surfactant), petroleum base (for example, mineral oil, solvent), oil film conditioner (for example, mineral oil, crystalline substance, viscous substance), oxidation Examples include ordinary rust preventive oils, cleaning rust preventive oils, and lubricating rust preventive oils mainly composed of inhibitors (for example, phenolic antioxidants) and lubricants (for example, extreme pressure additives). . Usual anti-rust oils include fingerprint-removed anti-rust oils that are dissolved and decomposed in petroleum-based solvents, solvent-diluted anti-rust oils, petrolactams, wax-based lubricating oil-type anti-rust oils, Examples include vaporizable rust preventive oil.

  In consideration of safety, it is desirable that it is not easily ignited industrially. More specifically, the flash point is preferably 70 ° C. or higher, more preferably 90 ° C. or higher, and further preferably 200 ° C. or higher.

  The adhesive 11 is an adhesive containing 3 to 40% by volume of a nitrile butadiene component. The main component of the adhesive 11 is an acrylic or epoxy-based component or a mixture thereof, and the viscosity is preferably 2000 to 200000 mPa · s, more preferably 6000 to 60000 mPa · s.

  The viscosity of the adhesive 11 is not limited as long as the adhesive 11 can fix the positions of the surface plates 2 and 3 and the honeycomb 1, but in reality, the adhesive 11 is an adhesive that contains nitrile rubber, so it is 1000 mPa · s or more. Become. Regarding the upper limit, 1000000 mPa · s can be said to be the upper limit in terms of practical strength and workability within a range in which the nitrile butadiene rubber and the main component can be uniformly mixed.

  The viscosity of the adhesive 11 here may be the lowest viscosity that is recorded in the course from the time when the adhesive is applied until it is cured, and the adhesive applied at 1000000 mPa · s is 50000 mPa · s during the heat curing. Even if the history is recorded, the effect of the invention can be sufficiently obtained. The viscosity is a value measured at 2 rpm with an E-type viscometer.

The rust preventive oil 12 is applied to the aluminum honeycomb 1 with an application amount of ² to 25 g / m ² or less. And it has the structure which the adhesive agent 11 and the antirust oil 12 touch by the adhesive agent 11 and the honeycomb which were apply | coated beforehand on the surface plates 2 and 3 contacting.

  The honeycomb sandwich panel according to the present invention is manufactured by bonding and fixing a honeycomb 1 which is an aggregate of cells and surface plates 2 and 3 stacked on both sides thereof. When a person gets on, the adhesive 11 having an elastic modulus of 100 MPa or more is used. When a person does not get on, there is no lower limit, but the adhesive 11 may have an elastic modulus of 10 MPa or more.

  In addition to improving the performance of the adhesive 11, an adhesive 11 in which a component derived from acrylonitrile butadiene is mixed is used as a component for assisting compatibility between the rust preventive oil 12 and the adhesive 11. Further, the resin responsible for curing the adhesive 11 may be a soft adhesive such as a silicone adhesive or a modified silicone adhesive, or may use rigidity such as an epoxy resin, a urethane resin, an acrylic resin, or a phenol resin. From the viewpoint of easy mixing with nitrile butadiene rubber, the adhesive 11 is preferably acrylic or epoxy.

  The nitrile butadiene rubber is considered to have an effect of absorbing oil moderately and an effect of developing toughness as the adhesive 11. If the amount is too small, it will not contribute to the effective absorption of oil or the expression of the properties of the adhesive 11. On the other hand, when the amount is too large, the property of absorbing oil is improved, but the cohesive force of the adhesive itself is lowered, and it does not function as a practical adhesive. For that reason, it is important to use a nitrile butadiene rubber adjusted to about 3% to 40% by volume.

  Unlike surface bonding, the honeycomb 1 is bonded to the surface plates 2 and 3 by forming the adhesive 11 in a fillet shape, so that the volume of the adhesive 11 per surface is relatively large. For this reason, the room which can absorb oil on the adhesive agent 11 side spreads. Components other than nitrile butadiene rubber, such as acrylic monomers and epoxy monomers themselves, are considered to have an aspect compatible with oil. However, development of strength is the main function, and there are many aspects that depend on molecular weight, stabilizers, etc., so uncertainty remains in terms of stability.

  Nitrile butadiene is classified as low nitrile, medium nitrile, high nitrile, or very high nitrile depending on the content ratio of acrylonitrile and butadiene, but any nitrile butadiene may be used. Further, it may be three-dimensionally cross-linked, may be terminal-modified with a carboxyl group, may contain isoprene, or may be acrylate-modified.

The application amount of the adhesive 11 is not limited as long as the sandwich panel can exhibit strength, and considering the environmental load due to economical use reduction, 50 to 1000 g / m ^{2 is} good, and the adhesive strength is stabilized. From the viewpoint of making it, a coating amount of 150 to 500 g / m ² is good. The type of the adhesive 11 to be used may be different on the upper side and the lower side or in the plane.

  FIG. 2 is a cross-sectional view showing another configuration of the honeycomb sandwich panel according to Embodiment 1 of the present invention. The portion that is subject to corrosion is often the outermost periphery, and as shown in FIG. 2, only the outside of the sandwich panel may have a partial corrosion-resistant structure.

  Any kind of rust preventive oil 12 may be used as long as the corrosion resistance of the aluminum honeycomb 1 can be improved. From an industrial point of view, mineral oil or synthetic oil molecules are used as a base material. The rust preventive oil 12 may be used. At the time of application to the honeycomb 1, it is immersed in a puddle of oil or sprayed on the honeycomb 1.

  The thickness of the honeycomb sandwich panel is suitably 4 mm to 100 mm. In order to ensure rigidity, the structure may be a combination of a honeycomb sandwich panel and a reinforcing material. The thickness of the honeycomb sandwich panel is set to about 4 mm at a portion where rigidity is secured by a member other than the sandwich panel or a portion where rigidity is not so required. On the other hand, in a portion where the reinforcing material is reduced or a portion where high rigidity is required, the thickness of the honeycomb sandwich panel is set to about 100 mm to ensure rigidity.

  In the present invention, it is possible to improve the corrosion resistance of the aluminum honeycomb 1 while maintaining the bonding strength of the bonded portion regardless of the thickness of the honeycomb sandwich panel.

  Further, the area of the honeycomb sandwich panel is about 100 mm × 100 mm when a plurality of honeycomb sandwich panels are used side by side, and about 2500 mm × 2500 mm when used alone.

  In the inside of the honeycomb sandwich panel, when there is salt or the like that induces corrosion due to condensation or the like, the corrosion is accelerated. In order to suppress the corrosion, it is effective to reduce the supply amount of oxygen and water to the honeycomb 1 so that no corrosion current is generated. Unlike iron, an oxide film serving as a passivating film is present on the surface of aluminum. Therefore, application of rust preventive oil 12 as in iron is usually not performed. However, in the case of the aluminum honeycomb 1 formed of a thin aluminum foil of several tens of microns, the applicant of the present application is that applying such a rust preventive oil 12 is very effective in suppressing corrosion. I found.

Accordingly, 12 g of rust-preventing oil is applied to the aluminum honeycomb 1 at a coating amount of 1 to 25 g / m ² , nitrile butadiene rubber is contained, and acrylic or epoxy-based molecules are added to the main component to be cured. The adhesive 11 containing more than one kind was brought into contact within a range of 2000 to 200000 mPa · s, and the surface plates 2 and 3 and the aluminum honeycomb 1 were combined to form a sandwich panel.

A practically sufficient effect can be obtained by the presence of at least 0.5 g / m ² or more of the rust preventive oil 12 in the aluminum honeycomb 1. However, when the rust preventive oil 12 is applied to the honeycomb 1, when the honeycomb 1 is bonded to the surface plates 2 and 3, the honeycomb 1 is set up vertically, and thus the rust preventive oil 12 hangs down. When the surface plates 2 and 3 are bonded one by one, the amount of the rust preventive oil 12 on the surface that the adhesive 11 touches is relatively small, but when the upper and lower sides are bonded simultaneously, the upper and lower sides And the amount of the rust preventive oil 12 is different. Therefore, it is difficult to make the present invention a practical product unless the combination of the rust preventive oil 12 and the adhesive 11 having an allowable range in coating amount.

As the viscosity of the rust preventive oil 12, it is important to keep the viscosity at 25 ° C. at 2 rpm to about 0.5 to 150 mPa · s. If it is less than 0.5 mPa · s, it will sag too much and only 0.5 g / m ² or less of the rust preventive oil 12 will remain, and a part that cannot be expected to have a rust preventive effect will occur. This is because when the rust preventive oil 12 of 25 g / m ² or more remains on the surface and comes into contact with the adhesive 11, the rust preventive oil 12 affects the adhesive strength.

  The material of the aluminum honeycomb 1 is desirably 3003 or 5052 from the viewpoint of availability. The thickness of the aluminum alloy is preferably 0.05 mm to 0.3 mm, and more preferably 0.1 mm or less from the viewpoint of weight reduction. The honeycomb 1 is manufactured using, for example, a laminated plate obtained by bonding an aluminum alloy foil with an adhesive 11 or a laminated plate joined by brazing.

  The shape of the cell is not particularly limited, such as a triangle, a quadrangle, or a hexagon, but a regular hexagon is desirable from the viewpoint of availability. When the shape of the cell is a regular hexagon, the length of one side of the regular hexagon is generally 3 mm to 20 mm. However, from the viewpoint of the contact point with the adhesive 11, it is desirable to use a regular hexagon having a side length of 3 mm to 10 mm, and more desirably 3 mm to 6 mm.

  Since the present invention imparts rust prevention properties, sufficient effects can be obtained without special surface treatment of aluminum. Therefore, in order to further secure the anticorrosion effect, it is not necessary to perform a special surface treatment on the surface of the honeycomb made of an aluminum alloy, but phosphoric acid-based, chromium-based, zirconium-based, manganese-based chemical treatment or anode A surface treatment such as oxidation may be performed to preliminarily provide corrosion resistance.

  The adhesive 11 is preferably applied to the surface plates 2 and 3 in order to create a fillet shape of the adhesive. The application method of the adhesive 11 is not particularly limited, but may be applied using an air pressure feed type or plunger type pump. Alternatively, the adhesive 11 may be applied in the form of dots or lines using an automatic machine. The adhesive 11 is applied so as to be scattered, and the adhesive 11 is extended using a spatula or a comb iron. Also good.

  The surface plates 2 and 3 to which the adhesive 11 is applied and the honeycomb 1 are overlapped, the adhesive 11 is cured while being pressurized, and then the pressure is released to allow the honeycomb 1 and the surface plates 2 and 3 to be cured. And are bonded. As a pressurizing method, for example, a method of uniformly placing a weight stone or a method by vacuuming can be used. Moreover, you may heat in the range by which the compatibility of the antirust oil 12 and the adhesive agent 11 is not inhibited.

  A hot press may be used. In the present invention, the viscosity and temperature when the adhesive 11 and the rust preventive oil 12 are in contact are important, and the temperature at the time of contact is preferably in the range of 5 to 50 ° C. The chemical stability of the adhesive 11 Considering the above, 10 to 35 ° C. is more desirable.

Regarding the pressure of the pressurization, if the pressure is less than 10 gf / cm ² , the pressure is too small to obtain good adhesive strength, and if it exceeds 30 kg / cm ^2, there is a risk that the manufactured honeycomb sandwich panel is deformed. is there. Therefore, the applied pressure is desirably set to 10 gf / cm ^{2 to} 30 kg / cm ^2, and more desirably set to 50 gf / cm ² to ⁵ kg / cm ² .

  Hereinafter, the present invention will be described in detail using specific examples. The results of Examples and Comparative Examples are shown in Table 1. Further, the bonding structure of the evaluation panel of the honeycomb sandwich panel manufactured in each example corresponds to that shown in FIG.

  Moreover, the adhesiveness and corrosion resistance of the sample produced by the Example and the comparative example were confirmed with the following method. First, the adhesive strength was measured according to the method of the flat-wise test of ASTM-C297. The measurement was performed at an evaluation area of 50 mm × 50 mm and a crosshead speed of 5 mm / min at 23 ° C. The cell shape of the honeycomb 1 was a regular hexagon. As a practical adhesive strength, if it has 500N, it will function as a panel. Therefore, among the measured samples, a combination in which 500N or less is recognized as the lowest adhesive strength was determined as NG.

  As for the corrosion resistance test, the prepared sample was sprayed with a 5% sodium chloride aqueous solution at 30 ° C. for 30 minutes in accordance with JIS K5621, and a wet test was performed at 30 ° C. for 90 minutes, followed by hot air drying at 50 ° C. for 120 minutes. Then, hot air drying at 30 ° C. for 120 minutes is performed. This was defined as one cycle, and a total of 50 cycles were carried out to confirm the corrosion status of the honeycomb 1. Those in which holes that can be visually recognized were observed in the honeycomb were judged as defective.

<Example 1>
The honeycomb 1 was made of an aluminum A3003-H19 material having a foil thickness of 0.06 mm, a cell size of 6 mm on one side, and a height of 10 mm in a rectangular shape of 400 mm (short direction) × 500 mm (longitudinal direction). The honeycomb 1 was developed in the direction of 500 mm. That is, the cells were arranged in a direction in which the two opposite sides of the cell were orthogonal to the direction (longitudinal direction) of 500 mm.

After the honeycomb 1 is expanded, the honeycomb 1 is immersed in a reservoir of rust preventive oil 12 having a viscosity of 1 mPa · s in an E-type viscometer (2 rpm) at 25 ° C. I dropped the oil. The weight increase per area was 0.3 g / m ² .

  The upper surface plate 2 was made of aluminum A5052-H34 and formed into a flat plate of 400 mm × 500 mm × 1 mm. The lower surface plate 3 was made of aluminum A5052-H34 and formed into a flat plate of 400 mm × 500 mm × 1 mm.

The upper surface plate 2 and the lower surface plate 3 were mechanically polished on the bonding surfaces and then washed with acetone. Next, in a two-component acrylic adhesive containing 10% by volume of a nitrile butadiene rubber component after mixing, a plunger-type adhesive adjusted to a viscosity of 26000 mPa · s with an E-type viscometer (2 rpm) at 25 ° C. It pumped using the pump, mixed with the static mixer, and it apply | coated to the adhesive surface of the upper surface board 2 and the lower surface board 3 with the wiping machine, and spread using the comb iron. FIG. 3 is a diagram showing an example of the shape of the comb iron used for spreading the adhesive 11 in the honeycomb sandwich panel according to Embodiment 1 of the present invention. At this time, the application amount of the adhesive 11 was 300 g / m ² .

  Next, the honeycomb 1 is sandwiched between the bonding surfaces of the upper surface plate 2 and the lower surface plate 3, and the laminate is evacuated using a polyethylene sheet with the lower surface plate 3 facing down and pressed at 0.07 MPa. The adhesive 11 was cured by leaving it at room temperature for 6 hours. Thereafter, the pressure was released and the sample was allowed to stand at room temperature for one week to prepare an evaluation sample.

  After the honeycomb panel was formed, it was partially cut out to a size of 50 mm × 50 mm, and an ASTM-C297 flatwise test was performed at 23 ° C.

  Moreover, about the sample which was not cut | disconnected by the size of 400x500 mm, the composite cycle test including the salt spray according to JISK5621 was implemented, and it was confirmed whether the corrosion hole produced in a honeycomb part.

<Example 2>
The viscosity of the rust preventive oil 12 to be immersed was changed to a value different from that of the previous Example 1.
After the honeycomb 1 is expanded, the honeycomb 1 is immersed in a reservoir of rust preventive oil 12 having a viscosity of 3.5 mPa · s in an E-type viscometer (2 rpm) at 25 ° C. Too much oil dropped. The weight increase per area was 1 g / m ² . Except this point, it was produced and evaluated in the same manner as in Example 1 above.

<Example 3>
The viscosity of the rust preventive oil 12 to be immersed was changed to a value different from those of Examples 1 and 2.
After the honeycomb 1 is unfolded, it is immersed in a reservoir of rust preventive oil 12 having a viscosity of 13 mPa · s in an E-type viscometer (2 rpm) at 25 ° C. I dropped some oil. The increase in weight per area was 3.5 g / m ² . Except for this point, it was produced and evaluated in the same manner as in Examples 1 and 2 above.

<Example 4>
The viscosity of the rust preventive oil 12 to be immersed was changed to a value different from those of Examples 1 to 3.
After the honeycomb 1 is expanded, the honeycomb 1 is immersed in a reservoir of rust preventive oil 12 having a viscosity of 25 mPa · s in an E-type viscometer (2 rpm) at 25 ° C. I dropped some oil. The weight increase per area was 6 g / m ² . Except this point, it produced and evaluated similarly to previous Examples 1-3.

<Example 5>
The viscosity of the rust preventive oil 12 to be immersed was changed to a value different from those of the previous Examples 1 to 4.
After the honeycomb 1 is expanded, the honeycomb 1 is immersed in a reservoir of rust preventive oil 12 having a viscosity of 60 mPa · s in an E-type viscometer (2 rpm) at 25 ° C. I dropped some oil. The weight increase per area was 14 g / m ² . Except this point, it produced and evaluated like the previous Examples 1-4.

<Example 6>
The viscosity of the rust preventive oil 12 to be immersed was changed to a value different from those of the previous Examples 1 to 5.
After the honeycomb 1 is expanded, the honeycomb 1 is immersed in a reservoir of rust preventive oil 12 having a viscosity of 150 mPa · s of an E-type viscometer (2 rpm) at 25 ° C., and is taken out and falls off the honeycomb 1 naturally. I dropped some oil. The increase in weight per area was 43 g / m ² . Except this point, it produced and evaluated like the previous Examples 1-5.

<Example 7>
In addition to changing the viscosity of the rust preventive oil 12 to be immersed, the type of the adhesive 11 was changed.
After the honeycomb 1 is unfolded, it is immersed in a reservoir of rust preventive oil 12 having a viscosity of 13 mPa · s in an E-type viscometer (2 rpm) at 25 ° C. I dropped some oil. From the difference in weight, the weight increase per area was 3.5 g / m ² .

The upper surface plate 2 and the lower surface plate 3 were mechanically polished on the bonding surfaces and then washed with acetone. Next, in a two-component acrylic adhesive containing 5% by volume of a nitrile butadiene rubber component after mixing, a plunger-type adhesive adjusted to a viscosity of 5000 mPa · s with an E-type viscometer (2 rpm) at 25 ° C. It pumped using the pump, mixed with the static mixer, and it apply | coated to the adhesive surface of the upper surface board 2 with the wiping machine, and spread with the comb eye shown in previous FIG. At this time, the application amount of the adhesive 11 was 150 g / m ² .

Thereafter, the surface plate 2 coated with the adhesive 11 is laid on the lower side, the aluminum honeycomb 1 is placed thereon, and the 1 mm-thick aluminum plate not coated with the adhesive 11 is placed on the upper side of the aluminum honeycomb. Then, a load of 1 kg / cm ² was applied with a press machine and left to cure at 25 ° C. for 2 hours.

Thereafter, in a two-component acrylic adhesive containing 10% by volume of a nitrile butadiene rubber component after mixing in a similar manner to the surface plate 3 for bonding another sheet, an E-type viscometer (2 rpm) at 25 ° C. What was adjusted to a viscosity of 26000 mPa · s was pumped using a plunger-type pump, mixed with a static mixer, and applied to the adhesive surfaces of the upper surface plate 2 and the lower surface plate 3 with a wiping machine, It was spread with the comb iron shown in FIG. At this time, the application amount of the adhesive 11 was 300 g / m ² .

The plate 1 with the honeycomb 1 and the surface plate 2 bonded to each other is reversed, the honeycomb 1 and the adhesive 11 are brought into contact with each other, a load of 1 kg / cm ² is applied by a pressing device, and the plate is left to stand at 25 ° C. for 2 hours for bonding. Agent 11 was cured. Furthermore, the obtained sandwich panel was cured at room temperature for 1 week, and then evaluated.

<Example 8>
The viscosity of the rust preventive oil 12 to be immersed was changed to a value different from that of the previous Example 7.
After the honeycomb 1 is expanded, the honeycomb 1 is immersed in a reservoir of rust preventive oil 12 having a viscosity of 25 mPa · s in an E-type viscometer (2 rpm) at 25 ° C. I dropped some oil. The weight increase per area was 6 g / m ² . Except for this point, it was produced and evaluated in the same manner as in Example 7 above.

<Example 9>
The viscosity of the rust preventive oil 12 to be immersed was changed to a value different from those in Examples 7 and 8 above.
After the honeycomb 1 is expanded, the honeycomb 1 is immersed in a reservoir of rust preventive oil 12 having a viscosity of 60 mPa · s in an E-type viscometer (2 rpm) at 25 ° C. I dropped some oil. The weight increase per area was 14 g / m ² . Except this point, it was produced and evaluated in the same manner as in Examples 7 and 8 above.

<Example 10>
A two-component epoxy adhesive having the same configuration as in Example 1 but having a viscosity of 55000 mPa · s after mixing the adhesive 11 was used. This adhesive 11 is an adhesive 11 that has a minimum viscosity of 4000 mPa · s at 60 ° C. when the temperature is increased at 5 ° C./min, the temperature is kept constant at 60 ° C., and the change in viscosity is examined.

After the honeycomb 1 is expanded, the honeycomb 1 is immersed in a reservoir of rust preventive oil 12 having a viscosity of 25 mPa · s of an E-type viscometer (2 rpm) at 25 ° C. and a viscosity of 60 ° C. (1.8 mPa · s). The excess oil that was taken out and dropped away from the honeycomb 1 naturally was dropped. The increase in weight per area was 3.5 g / m ² .

The upper surface plate 2 and the lower surface plate 3 were mechanically polished on the bonding surfaces and then washed with acetone. Next, a one-part epoxy adhesive containing 13% by volume of a nitrile butadiene rubber component after mixing was adjusted to a viscosity of 55000 mPa · s with an E-type viscometer (2 rpm) at 25 ° C. Was mixed with a static mixer, applied to the adhesive surface of the upper surface plate 2 with a wiping machine, and spread with a comb iron shown in FIG. At this time, the application amount of the adhesive 11 was 300 g / m ² .

Thereafter, the aluminum honeycomb 1 is sandwiched between the surface plate 2 and the surface plate 3 to which the adhesive 11 is applied, a weight of 1 kg / cm ² is applied by a hot press device, and heat of 60 ° C. is applied from the press surface to 120 ° C. Heated for a minute to cure.

<Example 11>
A two-component epoxy adhesive having the same configuration as that of Example 10 but having a viscosity of 55000 mPa · s after mixing the adhesive 11 was used.
After the honeycomb 1 is expanded, the honeycomb 1 is immersed in a reservoir of rust preventive oil 12 having a viscosity of 25 mPa · s at an E-type viscometer (2 rpm) at 25 ° C. and a viscosity of 7 mPa · s at 60 ° C. The excess oil that falls off the honeycomb 1 naturally dropped. The increase in weight per area was 23 g / m ² . Except for the above points, it was produced and evaluated in the same manner as in Example 10 above.

<Example 12>
A one-component epoxy adhesive containing 10% by volume of a nitrile butadiene rubber component and having a viscosity of an adhesive 11 of 250000 mPa · s at 25 ° C. was used in the same manner as in Example 1 above. This adhesive 11 is the adhesive 11 whose viscosity becomes the lowest at 44000 mPa · s at 80 ° C. when the change in the viscosity due to the temperature rise is examined at 5 ° C./min, and thereafter the viscosity rises.

After the honeycomb 1 is unfolded, it is immersed in a pool of rust preventive oil 12 having an E-type viscometer (2 rpm) at 25 ° C. with a viscosity of 100 mPa · s and a viscosity at 100 ° C. of 2 mPa · s. The excess oil that dropped away from the honeycomb 1 was dropped. The increase in weight per area was 23 g / m ² .

The upper surface plate 2 and the lower surface plate 3 were mechanically polished on the bonding surfaces and then washed with acetone. Next, a one-part epoxy adhesive containing 10% by volume of a nitrile butadiene rubber component after mixing was adjusted to a viscosity of 820000 mPa · s with an E-type viscometer (2 rpm) at 25 ° C. Was mixed with a static mixer, applied to the adhesive surface of the upper surface plate 2 with a wiping machine, and spread with a comb iron shown in FIG. At this time, the application amount of the adhesive 11 was 350 g / m ² .

Thereafter, the aluminum honeycomb 1 is sandwiched between the surface plate 2 and the surface plate 3 to which the adhesive 11 is applied, a weight of 1 kg / cm ² is applied by a hot press apparatus, and heat of 100 ° C. is applied from the press surface to 120. Heated for a minute to cure. Then, after cooling to room temperature, it evaluated.

<Example 13>
In addition to changing the viscosity of the rust preventive oil 12 to be immersed, the type of the adhesive 11 was changed.
After the honeycomb 1 is expanded, the honeycomb 1 is immersed in a reservoir of rust preventive oil 12 having a viscosity of 3.5 mPa · s in an E-type viscometer (2 rpm) at 25 ° C. Too much oil dropped. The weight increase per area was 1 g / m ² . Except this point, it was produced and evaluated in the same manner as in Example 1 above.

The upper surface plate 2 and the lower surface plate 3 were mechanically polished on the bonding surfaces and then washed with acetone. Next, a two-part acrylic adhesive containing 25% by volume of a nitrile butadiene rubber component after mixing was adjusted to a viscosity of 200,000 mPa · s with an E-type viscometer (2 rpm) at 25 ° C. It pumped using the pump, mixed with the static mixer, and it apply | coated to the adhesive surface of the upper surface board 2 and the lower surface board 3 with the wiping machine, and spread with the comb eye shown in previous FIG. At this time, the application amount of the adhesive 11 was 450 g / m ² . Except this point, it was produced and evaluated in the same manner as in Example 1 above.

<Comparative Example 1>
The honeycomb 1 was made of an aluminum A3003-H19 material having a foil thickness of 0.06 mm, a cell size of 6 mm on one side, and a height of 10 mm in a rectangular shape of 400 mm (short direction) × 500 mm (longitudinal direction). The honeycomb 1 was developed in the direction of 500 mm. That is, the cells were arranged in a direction in which two opposite sides of the cell were orthogonal to the 500 mm direction (longitudinal direction).

After the honeycomb 1 is expanded, the honeycomb 1 is immersed in a reservoir of rust preventive oil 12 having a viscosity of 0.3 mPa · s in an E-type viscometer (2 rpm) at 25 ° C. Too much oil dropped. The increase in weight per area was 0.1 g / m ² or less.

  The lower surface plate 3 was made of aluminum A5052-H34 and formed into a flat plate of 400 mm × 500 mm × 1 mm. The upper surface plate 2 was made of aluminum A5052-H34 and formed into a flat plate of 400 mm × 500 mm × 1 mm.

The upper surface plate 2 and the lower surface plate 3 were mechanically polished on the bonding surfaces and then washed with acetone. Next, in a two-component acrylic adhesive containing 13% by volume of a nitrile butadiene rubber component after mixing, a plunger-type adhesive adjusted to a viscosity of 55000 mPa · s with an E-type viscometer (2 rpm) at 25 ° C. It pumped using the pump, mixed with the static mixer, and it apply | coated to the adhesive surface of the upper surface board 2 and the lower surface board 3 with the wiping machine, and spread with the comb eye shown in previous FIG. At this time, the application amount of the adhesive 11 was 300 g / m ² .

  Next, the honeycomb 1 is sandwiched between the bonding surfaces of the upper surface plate 2 and the lower surface plate 3, and the laminate is evacuated using a polyethylene sheet with the lower surface plate 3 facing down and pressed at 0.07 MPa. The adhesive 11 was cured by leaving it at room temperature for 6 hours. Thereafter, the pressure was released and the sample was allowed to stand at room temperature for one week to prepare an evaluation sample.

<Comparative example 2>
The honeycomb 1 was made of an aluminum A3003-H19 material having a foil thickness of 0.06 mm, a cell size of 6 mm on one side, and a height of 10 mm in a rectangular shape of 400 mm (short direction) × 500 mm (longitudinal direction). The honeycomb 1 was developed in the direction of 500 mm. That is, the cells were arranged in a direction in which two opposite sides of the cell were orthogonal to the 500 mm direction (longitudinal direction).

  After the honeycomb 1 was unfolded, the rust preventive oil 12 or the like was used without being applied. The lower surface plate 3 was made of aluminum A5052-H34 and formed into a flat plate of 400 mm × 500 mm × 1 mm. The upper surface plate 2 was made of aluminum A5052-H34 and formed into a flat plate of 400 mm × 500 mm × 1 mm.

The upper surface plate 2 and the lower surface plate 3 were mechanically polished on the bonding surfaces and then washed with acetone. Next, in a two-component acrylic adhesive containing 13% by volume of a nitrile butadiene rubber component after mixing, a plunger-type adhesive adjusted to a viscosity of 55000 mPa · s with an E-type viscometer (2 rpm) at 25 ° C. It pumped using the pump, mixed with the static mixer, and it apply | coated to the adhesive surface of the upper surface board 2 and the lower surface board 3 with the wiping machine, and spread with the comb eye shown in previous FIG. At this time, the application amount of the adhesive 11 was 300 g / m ² .

  Next, the honeycomb 1 is sandwiched between the bonding surfaces of the upper surface plate 2 and the lower surface plate 3, and the laminate is evacuated using a polyethylene sheet with the lower surface plate 3 facing down and pressed at 0.07 MPa. The adhesive 11 was cured by leaving it at room temperature for 6 hours. Thereafter, the pressure was released and the sample was allowed to stand at room temperature for one week to prepare an evaluation sample.

<Comparative Example 3>
Although it is the same structure as the comparative example 1, the following were used as the antirust oil 12 to apply.
After the honeycomb 1 is unfolded, it is immersed in a reservoir of rust preventive oil 12 having a viscosity of 180 mPa · s in an E-type viscometer (2 rpm) at 25 ° C. I dropped some oil. The increase in weight per area was 51 g / m ² or less. Except for this point, a sandwich panel having the same configuration as in Comparative Example 1 was prepared and evaluated.

<Comparative example 4>
The honeycomb 1 was made of an aluminum A3003-H19 material having a foil thickness of 0.06 mm, a cell size of 6 mm on one side, and a height of 10 mm in a rectangular shape of 400 mm (short direction) × 500 mm (longitudinal direction). The honeycomb 1 was developed in the direction of 500 mm. That is, the cells were arranged in a direction in which the two opposite sides of the cell were orthogonal to the direction (longitudinal direction) of 500 mm.

After the honeycomb 1 is expanded, the honeycomb 1 is immersed in a reservoir of rust preventive oil 12 having a viscosity of 0.3 mPa · s in an E-type viscometer (2 rpm) at 25 ° C. Too much oil dropped. The increase in weight per area was 0.1 g / m ² or less.

  The lower surface plate 3 was made of aluminum A5052-H34 and formed into a flat plate of 400 mm × 500 mm × 1 mm. The upper surface plate 2 was made of aluminum A5052-H34 and formed into a flat plate of 400 mm × 500 mm × 1 mm.

The upper surface plate 2 and the lower surface plate 3 were mechanically polished on the bonding surfaces and then washed with acetone. Next, a two-component acrylic adhesive containing 10% by volume of a nitrile butadiene rubber component after mixing was adjusted to a viscosity of 250,000 mPa · s with an E-type viscometer (2 rpm) at 25 ° C. It pumped using the pump, mixed with the static mixer, and it apply | coated to the adhesive surface of the upper surface board 2 and the lower surface board 3 with the wiping machine, and spread with the comb eye shown in previous FIG. At this time, the application amount of the adhesive 11 was 350 g / m ² .

  Next, the honeycomb 1 is sandwiched between the bonding surfaces of the upper surface plate 2 and the lower surface plate 3, and the laminate is evacuated using a polyethylene sheet with the lower surface plate 3 facing down and pressed at 0.07 MPa. The adhesive 11 was cured by leaving it at room temperature for 6 hours. Thereafter, the pressure was released and the sample was allowed to stand at room temperature for one week to prepare an evaluation sample.

<Comparative Example 5>
Although it is the structure similar to the previous comparative example 4, the adhesive agent 11 to be used was changed as follows.
The upper surface plate 2 and the lower surface plate 3 were mechanically polished on the bonding surfaces and then washed with acetone. Next, a two-part acrylic adhesive containing 1% by volume of a nitrile butadiene rubber component after mixing was adjusted to a viscosity of 80000 mPa · s with an E-type viscometer (2 rpm) at 25 ° C. It pumped using the pump, mixed with the static mixer, and it apply | coated to the adhesive surface of the upper surface board 2 and the lower surface board 3 with the wiping machine, and spread with the comb eye shown in previous FIG. At this time, the application amount of the adhesive 11 was 350 g / m ² .

<Comparative Example 6>
Although it is the structure similar to the previous comparative example 4, the adhesive agent 11 to be used was changed as follows.
The upper surface plate 2 and the lower surface plate 3 were mechanically polished on the bonding surfaces and then washed with acetone. Next, a two-component acrylic adhesive containing 45% by volume of a nitrile butadiene rubber component after mixing was adjusted to a viscosity of 180,000 mPa · s with an E-type viscometer (2 rpm) at 25 ° C. It pumped using the pump, mixed with the static mixer, and it apply | coated to the adhesive surface of the upper surface board 2 and the lower surface board 3 with the wiping machine, and spread with the comb eye shown in previous FIG. At this time, the application amount of the adhesive 11 was 350 g / m ² .

It shows below about the structure table | surface of an Example and a comparative example, and an evaluation result.
The adhesive strength was determined to be acceptable when the strength was 0.5 MPa or higher at 23 ° C. Corrosion resistance was determined based on whether or not holes that could be visually confirmed were confirmed in the aluminum honeycomb.

From the results of Examples 1 to 6 and Comparative Example 1, the oil applied as the rust preventive oil 12 has a viscosity of less than 1 mPa · s and the application amount remaining on the honeycomb is 0.1 g / m ² or less. It can be seen that the anticorrosion effect by oil is not effectively exhibited.

  Moreover, from the results of Examples 1 to 13 and Comparative Example 2, it can be seen that the corrosion resistance is not sufficient when the rust preventive oil 12 is not applied.

  Moreover, from the results of Examples 1 to 6 and Comparative Example 3, when the application amount of the rust preventive oil 12 is too large, the flow diffusion, compatibility, and adhesiveness with respect to the oil surface of the adhesive 11 cannot be sufficiently exhibited, and adhesion It can be seen that the power is reduced.

  Further, from the results of Examples 1 to 13 and Comparative Example 4, in the curing of the adhesive 11, the adhesive strength is obtained when the viscosity is 200000 mPa · s or less, but when the viscosity is greater than 200000 mPa · s, the oil of the adhesive 11 is obtained. It can be seen that the flow diffusion, compatibility, and adhesiveness to the surface cannot be sufficiently exhibited, and the adhesive force is reduced.

  Further, from the results of Examples 1 to 13 and Comparative Example 5, even when the viscosity of the adhesive 11 is 80000 mPa · s and the flow is in a range where the flow occurs appropriately, the content of the nitrile butadiene rubber is 1% or less by volume. Thus, it can be seen that if there are not enough ingredients to promote compatibility with oil, the adhesive strength will be reduced.

  Furthermore, it can be seen from the results of Examples 1 to 13 and Comparative Example 6 that if the content of the nitrile butadiene rubber is large, it does not function well as the structural adhesive 11 and the adhesive strength decreases.

  As described above, the honeycomb sandwich panel according to the present invention is technically characterized in that the honeycomb sandwich panel is fixed with a pair of surface plates and an adhesive in a state where the honeycomb is coated with rust-preventive oil. It is said. By having such a configuration, when the sandwich panel is used for a long period of time, even when condensation occurs in the honeycomb panel, the water-separable oil can protect the aluminum honeycomb and prevent corrosion. . Furthermore, since the oil and the resin are compatible, the oil is effectively absorbed by the resin, and the resin itself adheres to the honeycomb. As a result, the reliability of bonding between the aluminum honeycomb and the surface plate can be ensured.

  Furthermore, the following can be understood from the verification results based on various examples and comparative examples. That is, the nitrile butadiene rubber has an effect of appropriately absorbing oil, but if it is too small, it will not absorb the oil effectively and will not contribute to the development of the adhesive properties. On the other hand, when the amount is too large, the property of absorbing oil is improved, but the cohesive force of the adhesive itself is lowered, and it does not function as a practical adhesive.

Therefore, the following can be considered as an example of appropriate conditions.
- The aluminum honeycomb, rust-preventive oil rust oil 0.5g ^{/ m 2} ~15g ^/ m 2 was coated state.
-It fixes to a surface board using the adhesive agent containing 5-25 vol% of nitrile butadiene-type elastomers.
As a result, it was verified that a strength of 500 N or more was obtained with a flatwise strength when evaluated in an area of 50 × 50 mm.

  Further, the material of the honeycomb is not limited to aluminum, and materials other than aluminum are also applicable.

  Furthermore, the honeycomb sandwich panel of the present invention, which is lightweight, highly rigid, and excellent in corrosion resistance and adhesiveness, can be used for various applications such as elevator walls, ceilings, car floors, and vehicle air conditioner covers. .

  DESCRIPTION OF SYMBOLS 1 Aluminum honeycomb, 2 Upper surface board (surface board), 3 Lower surface board (surface board), 11 Adhesive, 12 Antirust oil.

Claims (7)

A honeycomb sandwich panel comprising a honeycomb which is an aggregate of cells and a pair of surface plates arranged so as to sandwich the honeycomb,
The honeycomb is coated with rust preventive oil,
The pair of surface plates is coated with an adhesive at a position where it adheres to the honeycomb,
A honeycomb sandwich panel in which the honeycomb coated with the rust preventive oil and the pair of surface plates coated with the adhesive are bonded and fixed so that the adhesive and the rust preventive oil are in contact with each other. The honeycomb sandwich panel according to claim 1,
The honeycomb is coated with 0.5 g / m ^{2 to} 15 g / m ² of anti-rust oil as the anti-rust oil,
The pair of surface plates is coated with an adhesive containing 5 to 25 vol% of a nitrile butadiene elastomer as the adhesive,
A honeycomb sandwich panel having a flatwise strength of 500 N or more when evaluated in an area of 50 × 50 mm by bonding and fixing the honeycomb and the pair of surface plates. The honeycomb sandwich panel according to claim 2,
The adhesive has a viscosity in a range of 2000 to 200000 mPa · s when applied to curing. Honeycomb sandwich panel. The honeycomb sandwich panel according to any one of claims 1 to 3,
The honeycomb is a honeycomb sandwich panel in which the rust preventive oil is applied to a portion disposed at a position corresponding to the outer peripheral portion of the honeycomb sandwich panel, and the rust preventive oil is not applied to other portions. The honeycomb sandwich panel according to any one of claims 1 to 4,
The honeycomb is a honeycomb sandwich panel made of an aluminum alloy. A method for manufacturing a honeycomb sandwich panel comprising a honeycomb and a pair of surface plates arranged so as to sandwich the honeycomb,
A first step of applying anti-rust oil to the honeycomb;
A second step of applying an adhesive to a position of the pair of surface plates that adheres to the honeycomb;
The adhesive and the rust preventive oil are brought into contact with the honeycomb coated with the rust preventive oil in the first step and the pair of surface plates coated with the adhesive in the second step. And a third step of bonding and fixing the honeycomb sandwich panel.   An elevator car in which the honeycomb sandwich panel according to any one of claims 1 to 5 is applied to a car flooring, a wall, or a ceiling.

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