JP2002253320A - Bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bag which is lightweight, strong, and safe, and especially suitable for housing a personal computer. SOLUTION: Sheet-like core material which is dispersingly distributed with tiny spherical cells independently at least in surface layer parts of foamed resin core material, is prepared through a process of mixing high density polyethylene and low density polyethylene, of adding a foaming agent for higher temperature and a foaming agent for lower temperature, and of heating to be expanded. The bag is characterized by having an exterior member formed with a laminated composite panel which is made up with the foamed resin core material and thin stainless steel plates bonded by thermal pressing onto the core material surfaces each through an adhesive resin film.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a luggage, and more particularly, to a light-weight bag using a laminated composite plate obtained by laminating a core material of an expandable synthetic resin and a stainless steel plate as an exterior member.
The present invention relates to a bag having excellent toughness and safety.

[0002]

2. Description of the Prior Art Aluminum, aluminum alloy, or synthetic resin is often used as a material for the exterior members of conventional personal computer bags and attache cases.

[0003] However, aluminum or its alloy is
It has low rigidity, is easily corroded by salt and atmospheric gas, loses its surface gloss at an early stage, and is inferior in durability when used over time. Also, aluminum or its alloy is generally said to be a lightweight material,
When these are used for the material of the exterior member of the bag, if the rigidity is to be given to the bag enough to ensure the safety against the personal computer or the like housed inside, the exterior member must be thick. As a result, there is a problem that the weight of the bag cannot be sufficiently reduced.

[0004] Further, when manufacturing a bag using a laminated composite board using aluminum (hereinafter sometimes referred to as "aluminum laminated composite board"), especially when the bag is adapted to the construction object by bending, In order to facilitate the above, the aluminum material used for the laminated composite board must be made soft, which causes a problem that the rigidity of the bag is further deteriorated.

Further, when a bag is manufactured using an aluminum laminated composite board, the laminated board is usually fitted and molded into an aluminum mold, so that the bag manufactured in this way has corners. It is formed sharply. Therefore, in this bag, there is a problem that it is dangerous if the corners hit the body, and safety in use cannot be ensured.

[0006] Bags made of synthetic resin can be reduced in weight, but have low toughness. That is, since this bag can be easily destroyed with a cutter knife or the like, the storage property cannot be satisfied.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks of the conventional bag. An object of the present invention is light weight, toughness, and excellent safety, is in particular to provide a suitable bag in the housing of the personal computer.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a method of mixing high-density polyethylene and low-density polyethylene, adding a high-temperature foaming agent and a low-temperature foaming agent, and heating and foaming the mixture. By laminating, a thin stainless steel material is hot-pressed and adhered via an adhesive resin film to the surface of a sheet-shaped core material in which small spherical air bubbles are mainly dispersed and distributed at least in the surface layer portion of the foamed resin core material. A bag characterized by having an exterior member formed from a composite plate, and as a preferred embodiment of the bag, the exterior member includes:
The exterior member is formed by drawing from the laminated composite plate, the exterior member is box-shaped, the exterior member has a rounded shape at the corner, and the bag is for a personal computer.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A bag according to the present invention has an exterior member formed of the following laminated composite plate.

[0010] 1. Laminated composite board The laminated composite board used in the present invention is obtained by mixing high-density polyethylene and low-density polyethylene, adding a high-temperature foaming agent and a low-temperature foaming agent thereto, and heating and foaming the mixture.
A thin stainless steel material is hot-pressed and adhered to the surface of a sheet-shaped core material in which small spherical air bubbles are mainly dispersed and distributed at least in the surface layer portion of the foamed resin core material via an adhesive resin film.

The laminated composite plate (hereinafter sometimes referred to as “stainless laminated composite plate”) has excellent quality, function, and a wide range of applications incomparable with a laminated composite plate using an aluminum plate. , As a manufacturing method,
While using a highly rigid stainless steel plate as an object,
It is possible to overcome the difficulty in manufacturing a laminated composite board due to the inherent rigidity and obtain a homogeneous product having the above unique quality and function.

[0012] As described above, the laminated composite plate includes a core material which is a foamed resin, a resin film bonded to the front and back surfaces of the core material, and a stainless steel plate sandwiching the core material and the resin film. Is configured.

The laminated composite board is manufactured, for example, as follows. To a mixture of high-density polyethylene and low-density polyethylene, add two types of blowing agents for high and low temperatures, add stabilizers and dispersants as needed, and add slip agents as needed. Is sufficiently kneaded in a compounding machine, and then heated and melted in a continuous extruder to foam. The core material is formed by continuously extruding this foam from a pressure outlet called a T-die and forming it into a sheet. Immediately after extruding, a resin film for bonding is adhered to the front and back surfaces of this core material sheet, and temporarily cooled and subjected to shrinkage processing. Heat and press-fit while uniting. Thus, the laminated composite board is completed.

Therefore, in the laminated composite board,
An extremely thin bonding resin film not involved in foaming is interposed between the core material made of foamed resin and the stainless steel plate. This resin film has, for example, several tenths of the thickness of the core material made of the foamed resin.

As described above, the foamed resin as the core material uses both high-density polyethylene and low-density polyethylene. The reason for this is as follows. Observation under a microscope revealed that when foamed with single density polyethylene, the surface of the foamed sheet serving as the core material did not have a flat surface. For example, when a foam sheet serving as a core material is produced by foaming only high-density polyethylene, the strength of a thin film of high-density polyethylene is low with respect to the gas pressure generated during foaming. State. On the other hand, when making a foamed sheet comprising a core material by only the low-density polyethylene, for the strength of the thin polyethylene film is weak, the foam sheet, becomes a surface state having a recess (also referred to as a shrinkage). On the other hand, when high-density polyethylene and low-density polyethylene are used in combination and are continuously processed in a short time using an extruder, foaming that occurs when high-density polyethylene or low-density polyethylene is used alone is caused. The above-mentioned defect with respect to the gas pressure generated sometimes can be corrected,
A core material having a foamed state with high surface smoothness can be obtained.

In the production of a laminated composite plate comprising such a foamed resin as a core material and a stainless steel plate adhered to both sides thereof, the mixing ratio of high-density polyethylene and low-density polyethylene used as raw materials is changed or continuous extrusion is performed. By changing the heating temperature during foaming in the machine,
Products having various expansion ratios can be obtained. A series of products obtained in this way have significantly different physical properties, particularly rigidity, smoothness of the product surface, and uniformity between the peripheral portion and the central portion, due to the difference in the manufacturing conditions.

A comparison between the product having high rigidity and good surface smoothness and uniformity and the product having poor surface smoothness and the internal foaming state of the foamed resin as a core material shows that the product has high rigidity and high surface roughness. In products with excellent smoothness and uniformity, at least the shape of the foam present in the surface layer of the core material is a relatively small spherical and elliptical sphere of uniform size, and furthermore, it is uniformly dispersed. are, but rigid, smoothness, and the product is inferior in the such uniformity properties, size variation of the bubbles present in the surface layer of the core is large,
Moreover, there are many distorted deformed bubbles, which are unevenly dispersed.

When the raw material resin used for foaming is polyethylene, the mixing ratio of the high-density resin to the low-density resin is about 3: 1 and the expansion ratio is about 1.2 to 2.2. It is possible to obtain a foamed state in which the diameter of the bubbles is in the range of 0.05 to 0.4 mm and uniform small grains, and the change of "erosion" or the like due to shrinkage is reduced. This is preferable because it can be dispersed substantially uniformly.

The specific gravity of the core material obtained under these conditions is:
It is about 0.6, light and excellent in heat insulation and sound insulation, and the surface smoothness is very good.

When the ratio of high-density polyethylene to low-density polyethylene is changed successively to produce cores having different foaming states, these cores have different physical properties as shown in the following table. Experimental example Mixing ratio Rigidity ratio Specific gravity (1) 3: 1 75 0.60 (2) 4: 1 100 0.75 (3) 3: 2 60.70 The core material obtained in Experimental example (1) is: When a stainless steel plate is laminated on this to form a laminated composite plate, preferable surface properties and appropriate rigidity can be expected. On the other hand, although the core material obtained in the experimental example (2) is excellent in rigidity, it has small crater-shaped irregularities on the surface, and when a stainless steel plate is laminated on this to form a laminated composite plate, Even if various bonding resin films are used for the bonding, the bonding strength is insufficient as it is, and only a laminated composite plate having poor resistance to bending is obtained. Further, the core material obtained in Experimental Example (3) has good surface properties as a core material, but has a weak stiffness, so that the laminated composite plate obtained by laminating a stainless steel plate on the core material is easily bent. Also, warpage easily occurs and flatness is hardly maintained.

From the results of these experiments, it can be seen that, even if a stabilizer or a dispersant is added to the raw materials in the production of the core material and the physical properties of the core material are improved by considering their quantity, the specific gravity is small and the desired rigidity is obtained. In order to obtain a core material that does not impair the adhesive function even by bending, the practical limit of the weight ratio of high-density polyethylene to low-density polyethylene is 1.5 to 4.

In parallel with the above experiment, the effect of the extrusion speed, that is, the moving speed of the stainless laminated composite plate as a flow operation, on the physical properties of the product was examined by a continuous extruder. When the moving speed is low, the shape of the bubbles in the surface layer of the core material is spherical or close to this, while when the moving speed is high, the bubbles gradually become elliptical in the foaming process before and after bonding with the stainless steel plate. becomes spherical, the major axis of the ellipsoidal in accordance with an increase of the moving speed day become larger than the short diameter. In this case, the foam in the deep portion of the core material is larger than the foam in the surface portion both in the case of the spherical shape and the elliptical shape, and the state of the deformation from the spherical shape to the elliptical spherical shape decreases in the deeper portion.

From these series of experimental results, it can be seen that even in the case of the above-mentioned experimental examples (2) and (3), the physical properties are improved by making the spherical bubbles into elliptical spheres, and the spherical bubbles are brought within the practical limit. It can be seen that is possible.

On the other hand, the effects of the expansion ratio on the functional properties of the various products obtained by these experiments were also examined. If the expansion ratio was too high, "dust" due to shrinkage and bending were observed. If the foaming ratio is too low, the specific gravity increases, and the most preferable physical properties at a specific gravity of around 0.6 are generated. The advantage of being able to perform is lost, further reducing productivity, increasing costs and not meeting marketability. From the above results, the expansion ratio was 1.2 to 2.2.
Clearly, it is desirable to obtain the intended product.

When the mixing ratio of the high-density polyethylene and the low-density polyethylene is 4 times at the maximum and 1.5 times at the minimum, the specific gravity is set to about 0.6 and the expansion ratio is 1.2 to
In order to achieve the range of 2.2, it is preferable to perform high external heating in the majority of the steps performed on the raw material input side of the continuous extruder and to gradually lower the external heating temperature in the remaining few steps. . In this way, it is possible to reclamation many closed cells low foaming in the seat. Furthermore, in such extrusion work in the continuous production of polyethylene sheets, the foaming is promoted by additional heating even after the process of clamping and heat-bonding the stainless steel sheets, regardless of the moving speed of the stainless laminated plywood. It is preferable to heat and foam before and after the above-mentioned clamping and heat bonding step. In this case, the low-foamed polyethylene sheet as described above can be efficiently and continuously produced.

Hereinafter, a specific example of a preferred method for manufacturing the laminated composite board and a laminated composite board obtained by this manufacturing method will be described. (1) Manufacture of a foamed resin sheet as a core material This manufacturing process is shown by each unit (FIGS. 3 and 4) shown in the upper left part of the flowchart of FIG. 1 and the left part of FIG. In this production method, both a high-density polyethylene and a low-density polyethylene are blended as a raw material resin as a raw material. As a desirable example, 75% by weight of high-density polyethylene (specific gravity 0.94 to 0.96) is added to low-density polyethylene (specific gravity 0.91 to 0.93) 2.
5% by weight. Mixing is performed by a blender 11,
On the other hand, the following additives are blended and kneaded. The additives consist of a vinyl alcohol AC # 3 (trade name, manufactured by Eiwa Chemical Industry Co., Ltd.) as a high-temperature foaming agent, and a spuncell BS25 and a dispersant (calcium stearate) as a low-temperature foaming agent. If necessary, a stabilizer such as powdered calcium and a dispersant such as liquid paraffin are further added. In this case, as examples of the amounts of the foaming agent, dispersant and stabilizer added to the foaming raw material resin, the foaming raw material resin is 100% by weight, the high-temperature foaming agent is 0.25% by weight, and the low-temperature foaming agent is 0.05%. Wt%, stabilizer 0.25
% By weight, and the dispersant is 0.20% by weight.

The kneaded raw material is supplied to the continuous extruder 12, undergoes heating and melting in the machine, and starts foaming. The external heating temperature of the continuous extruder 12 is in the range of 165 ° C. to 190 ° C.
By setting the extrusion speed from 2.8 to 5.2 m per minute, an initial step of obtaining a foamed resin in a low foaming state with a foaming ratio in the range of 1.20 to 2.20 starts. This first step also allows the closed cell diameter to be kept in the range of 0.05 to 0.40 mm. Here, the range of the bubble diameter is shown as 0.05 to 0.40 mm,
In resin foamed at a constant temperature gradient and a constant extrusion speed, a minimum of 0.05 mm in the surface layer and a maximum of 4.0 in the deep layer.
mm means that bubbles are mixed, and bubbles in a range of about X ± 0.01 mm with respect to a diameter X mm of a bubble region generated in a resin foamed at a constant temperature gradient and a constant extrusion speed (however, X = 0.05-4.0),
The value of X is also affected by the factors of the temperature gradient and the extrusion speed, causing a change in the value of X and a slight change in the range of the bubble size. Keeping X within the range of 0.05 to 4.0 is required in the present invention to maintain the physical properties of the target product, that is, rigidity, surface smoothness, and uniformity between the central portion and the peripheral portion. Because it is needed.

Here, the temperature change from the outside to the continuous extruder 12 for causing the foaming reaction, that is, the above-mentioned temperature gradient, was measured at 185.degree.
, And then the temperature is raised to 190 ° C., and this external heating is performed in the third step of the feeding process by the continuous extruder 12.
/ 5, and then, without a rapid temperature drop, gradually lower the temperature at the outlet side (for example, 175 ° C.)
In the vicinity of the left exit, the temperature is finally set to about 165 ° C. This is important for dispersing and distributing a large number of low-foaming small closed cells in the surface layer region of the sheet core material.

As is well known, the continuous extruder 12 is provided with a screw conveyor (not shown), and the resin material foamed and extruded by the rotation of the screw conveyor is extruded by a T-die. Machine 1
3, depending on the target product, 1.0 to 4.0
It is extruded as a sheet with a thickness of about mm.

The foamed resin core material C formed into a sheet is as follows:
In many cases, the extruder is continuously produced. In such a continuous production mode, the high-density polyethylene and the low-density polyethylene are mixed with each other in the heating, melting and foaming work in the continuous extruder 12. The additive, foaming agent, stabilizer, and dispersant as a slipping agent are further added to the resin raw material compounded in the compounding machine 11 to be introduced into the continuous extruder 12 after being sufficiently kneaded. , And is continuously extruded into a sheet form from an extruder 13 called a T-die by a screw conveyor set inside the continuous extruder 12.
In the sheet-shaped core material C which is heated and rolled out while being foamed by the dynamic state by such continuous feeding, the pressure from the surface layer portion to the deep layer portion together with the extrusion and the forming core With the continuous movement of the wood,
Bubbles generated by foaming are formed into an elliptical sphere having a major axis substantially along the length direction along the moving direction and a minor axis in a direction intersecting with the moving direction, and in a surface region close to the surface portion, these rugby ball-shaped Even if the elliptical spherical bubbles are not accurately aligned, the major axis is arranged in a direction generally along the surface layer surface, and as a result, the inner wall curved surface with a large radius in the elliptical spherical bubbles follows the surface layer surface. , than in the case of spherical bubbles generated in the foaming condition under the extrusion by a slower rate pursuant to static foaming conditions or which will generates little unevenness of the surface layer surface.

The aspect ratio of the elliptical spherical bubbles changes depending on the magnitude of the pressure applied to the bubbles and the magnitude of the extrusion speed in the extruder 13 called a T-die. The higher the extrusion speed below, the more the elliptical spheres tend to flatten, thereby increasing the smoothness of the surface layer surface. Becomes closer to a sphere.

On the other hand, in the deep region, when the pressure applied to the compression molding outlet is small and the extrusion molding speed is small, or when their synergistic action is small, large foamed bubbles are dispersed in a state close to a spherical state. When the pressure applied to the compression molding outlet is large and the extrusion molding speed is large, on the other hand, the pressure synergistic effect on the bubbles spreads to the deep layer region due to their synthetic synergistic effect. When the pressure applied to the extruder 13 is increased or the extrusion speed is increased, the pressure biasing action spreads to most of the bubbles. Thus, elliptical spherical bubbles having a large aspect ratio between the major axis and the minor axis are generated.

A foamed resin body in a foamed state made of a foamed resin material having a single density is used as a raw material in a continuous extruder 12.
The bubbles in the tissue when continuously extruded from the exit of the extruder 13 called a T-die are pressure-biased into an elliptical sphere due to the correlation between the pressing force and the moving speed. As the generated bubbles increase, the size of each elliptical spherical bubble also increases, and the elliptical spherical bubbles in the surface layer are broken, which has a large effect on the surface layer surface, causing irregularities on the surface layer surface and smoothing the surface. The result is unfavorable.

(2) Bonding of Adhesive Film and Shrinking Step The extruded foamed resin sheet has, as a second step, adhesive resin films F and F ′ on both front and back surfaces immediately after being extruded. The film is supplied by the film supply device 21 and attached. Adhesive Suitable examples of the resin film, there may be mentioned a thickness 0.03~0.05mm about films modified polyolefin modified with maleic anhydride are available from Mitsui Petrochemical Industries, Ltd., The stainless steel sheet SS and the core material C, which are not necessarily specified in this film, are laminated and bonded later.
Other thermoplastic films may be used as long as they have an affinity for the foamed resin sheet.

The core material C having the adhesive resin films F and F 'bonded on both sides in this manner passes through the continuous cooling roll 14 at the end of the second step, and temporarily reaches a temperature of 50 to 75.degree.
Is cooled to the area of By this cooling, the sheet of the foamed resin contracts by about 10% in width and almost no residual internal stress remains.

At this stage, if the residual internal stress is not eliminated by the shrinkage, the internal stress remaining on the core material C when the stainless steel sheet SS is bonded may be deflected or bent after forming the laminated composite plate. Or cause

If the required shrinkage of the foamed resin sheet is not performed at this stage, the foamed resin sheet sandwiched between the stainless steel sheets SS on both the front and back surfaces of the laminated composite plate as a product shrinks independently. However, only the core material C of the foamed resin sheet is depressed at the four peripheral edges of the product.

[Another Step of Pretreatment for Stainless Steel Sheet] The stainless steel sheet SS used in this manufacturing method, which is laminated and adhered to both surfaces of the core material C, has a thickness of 0.03 to 0.03 mm.
Since it is 0.20 mm, which is extremely thin, it is preferable to be wound into a roll from the viewpoint of continuous processing. As the stainless steel sheet SS, a stainless steel sheet generally called SUS-304 or SUS-430 is used, but is not limited to these, and other stainless steel sheets may be used as long as they have a temper as an annealing material. There may be.

Stainless steel sheet SS wound into a roll
Therefore, it is preferable to express the material as a stainless steel foil rather than a stainless steel sheet in order to specify a material. It is expressed in a unified way using the term steel sheet. The thin stainless steel sheet SS wound into a roll is once unwound and subjected to the following cleaning and surface treatment in its expanded state,
After being dried, it is wound again on another reel.

The cleaning treatment is performed by cleaning the stainless steel plate with an alkali having a pH of 10 or more, and the surface is degreased. Subsequent to this washing step, a surface treatment is performed with phosphoric acid, a chromate agent or the like, followed by drying. For rapid drying, hot air is sprayed, but since it is necessary to maintain a continuous process, do not spend time on drying,
It is desirable to dry in a short time by blowing hot air. In FIG. 1, reference numeral 31 indicates these steps.

Depending on the stretched state, the stainless steel sheet SS which has been subjected to the above-described surface treatment (in this case, needless to say, the surface treatment is performed on both the front and back surfaces of the stainless steel sheet SS) is applied to another stainless steel sheet SS. It is rewound by the reel. This re-wound stainless steel sheet SS is bonded and laminated on both sides of the core material C.
It is prepared as rolls 33 and 34 wound on a book reel, and attached to the bonding machines 32 and 32.

(3) Bonding and laminating step of stainless steel plate Rolls 33 and 3 wound on these two winding shafts
The stainless steel sheet SS drawn out and stretched from No. 4 is passed between several heating rolls, and preheated before joining and lamination. The preheating temperature is 150 ° C to 200 ° C.
It is in the range of ° C. The sheet-shaped core material C made of a foamed resin that has been sufficiently shrunk through the cooling step has the adhesive resin films F and F ′ on its respective surfaces, and the heating / compression bonding device 15 is applied to the heating / compression bonding device 15 following this cooling step. Sent in. The thermocompression bonding device 15 is provided with two rolls 41 and 42 mounted vertically above and below a surface orthogonal to the traveling direction of the sheet core material C.
The stainless steel sheet SS unwound from the roll 33 of the stainless steel sheet SS wound around one reel is fed into the upper surface of the sheet core C to which the adhesive resin film F is attached, and Rolled stainless steel sheet S
Stainless steel sheet SS fed from S roll 34
Is fed toward the lower surface of the sheet-shaped core material C to which the adhesive resin film F 'is bonded, whereby the sheet-shaped core material C is sandwiched by the stainless steel plates SS from the upper and lower surfaces, respectively. By the heat and pressure bonding by 41 and 42, the stainless steel plate SS is bonded and bonded to the upper and lower surfaces by the adhesive resin films F and F ', and the laminated composite plate SCS is formed. (Third step) external heating temperature in this case, depending on the thickness of the stainless steel plate SS, to a stainless steel plate SS having a thickness of 0.03Mm～0.20Mm, range from 180 ° C. to 190 ° C. ,
The pressing force of the rolls 41 and 42 is 15 by the weight of the rolls.
It is preferable to set the distance between the rolls to about 00 kg and to make the distance between the rolls about 0.03 mm narrower than the thickness of the laminated composite plate. In this case, the moving speed of the bonded laminated composite plate SCS is in a range of 2.5 m to 5.5 m per minute. In the moving speed range, the temperature range is set in this range, and the pressing force is set in this range. When the heating temperature becomes lower than the range when passing through the thermocompression bonding device 15, the thermoplastic adhesive resin is used. film F or F 'is not sufficiently heated, whereby is because not joined under sufficient adhesive strength stainless steel SS to the sheet-like core member C, and the upper limit of the temperature range in the opposite If it exceeds, the heat exceeds the intervening layers of the adhesive resin films F and F ′, and promotes foaming in the surface layer of the sheet-like core material C, so that the air bubbles in the surface layer of the core material C are increased, and the shape is increased. This is because it is difficult to change and make the physical properties of the product the desired physical properties.

The heating temperature region is in a relative relationship with the moving speed of the sheet core material C. At a higher moving speed, heating in a higher temperature region is applied. Since foaming is promoted inside the sheet-shaped core material C to change the foaming state, it is necessary to pay sufficient attention to the correlation between the speed and the temperature, and the speed at which the laminated composite board SCS bonded as a continuous process is sent out For example, when the thickness is set to 2.5 m / min in consideration of the working convenience, it is preferable to perform the thermocompression bonding at a temperature of about 180 ° C.

The moving speed depends on the inter-roll pressure at the time of pressure bonding, but changes the core structure of the laminated composite plate fed under a large pressure.

(4) Additional Heating Step for Laminated Composite Board The laminated composite board SCS extruded and bonded from the thermocompression bonding apparatus 15 is then subjected to several additional heating treatments and bonded by the adhesive resin films F and F '. Stabilize power.
In the figure, reference numerals 16-1, 16-2, 16-3,... Denote a pair of upper and lower heating rolls, and a desirable heating condition in the additional heating is a lamination of a core material C and a stainless steel sheet SS. When the temperature of the composite plate SCS is 95 ° C. to 117 ° C.
Heat to maintain the temperature in the range of
And the bonding by F 'is matured and the bonding strength is stabilized. (Fourth Step) (5) Slow Cooling Step for Laminated Composite Board The laminated composite board S having passed between these rollers at a constant speed
CS is similarly denoted by reference numerals 17-1, 17-2, 17-3,.
It is guided to a pair of upper and lower cooling rolls indicated by..., And is cooled until it reaches substantially normal temperature. This cooling is necessary as an annealing step to constantly stabilize the product,
In the removal and commercialization have been laminated composite plate SCS internal stresses arising out of the laminated stainless steel plate SS,
This is an important processing step for preventing the core portion from shrinking over time. (Fifth step) Laminated composite plate SC extruded from the final cooling roll
For S, a surface protection film is applied immediately after that, and subsequently, cutting is performed according to given product dimensions. Sign 1
Portion indicated by 8, the bonding device of the surface protective film,
Reference numeral 19 indicates this cutting device, and since a known cutting device is used, only the outline is shown in the figure.

The results of experiments comparing the product obtained by such a production method with a laminated composite plate in which an aluminum plate is combined with a core material are shown below. In this case, in order to clarify the comparison of the physical properties, the metal bonded and laminated to the core material has a thickness of 0.1 mm. In the table, ACA
Is a laminated composite plate using an aluminum plate as a metal plate, and SCS is a laminated composite plate using a stainless steel plate as a metal plate. Unit SCS ACA Thickness of composite plate mm 2.0 3.0 2.0 3.0 Specific gravity 1.36 1.07 0.86 0.80 Surface to pressure kg / m ² 2.72 3.21 1.72 2.40 Tensile strength kgf / mm ² 7.68 5.20 4.00 3.00 Flexural strength kgf / mm ² 15.38 10.14 9.50 7.70 Flexural modulus kgf / mm ² 5100 3260 1970 1400 Heat deformation temperature ℃ 117 90-95 2. 5, 6 the bag 50 which is one example of a bag according to bag the stainless laminate composite plate to the invention using as an exterior member,
It is shown in FIG. 7 and FIG. FIG. 5 is a front view of the bag 50, FIG. 6 is a left side view of the bag 50, and FIG.
FIG. 8 is a perspective view of the bag 50 with the lid of the bag 50 opened.

As shown in FIGS. 5 to 7, the bag 50 has a structure in which a handle is attached to a rectangular parallelepiped housing having a space capable of accommodating the objects, and a main body 51 and a lid 52. , And a grip 53. Body 51
Is a box-shaped member having a greater depth than the lid 52, which forms a housing portion of the bag 50 when combined with the lid 52. The main body 51 has a main body exterior member 54 and a main body interior member 55.

The body exterior part 54 forms the outer shell of the body part 51 and houses the body interior part 55 therein. The main body exterior member 54 is formed of the stainless steel laminated composite plate. The main body exterior portion 54 is provided with a shock absorbing force, static pressure, or heat applied to the bag 50 from the outside.
It has the function of protecting the items stored inside. As described above, the stainless steel composite used for the main body exterior portion 54 has a greater surface-to-pressure, tensile strength, bending strength, and flexural modulus than the laminated composite plate using the aluminum plate, and Since the heat distortion temperature is high, the body
Can sufficiently exhibit the above functions.

The thickness of the stainless steel laminate composite plate forming the main body exterior part 54, and the thickness of the stainless steel plate and the core material used for the stainless steel laminate composite plate are determined by the bag 5
It can be appropriately determined according to the purpose of use and the properties of the contents. For example, when high strength against external force or the like is desired, the thickness of the stainless steel laminated composite plate can be increased. When weight reduction is desired, the thickness of the stainless steel laminated composite plate can be reduced. For example, when the bag 50 is used as a personal computer bag, the thickness of the stainless steel laminated composite plate is 1.0 to 4.0 mm, and the thickness of the stainless steel plate is 0.05 to 0.20.
mm, and when the thickness of the core material is 0.9 to 3.6 mm, the personal computer, which is a contained item, can be sufficiently protected from the external action, and the bag 50 can be protected from being hindered when being carried. This is preferable because it can be made sufficiently lightweight. In addition, when a stainless steel having drawability such as SUS-304 to which elements such as copper and silicon are added is used as the type of the stainless steel plate, workability for drawing and the like is further improved while maintaining the above function. Is preferred.

As shown in FIGS. 5 to 8, the body exterior portion 54 has a rounded ridge. Since the ridge of the body exterior is formed in this manner, the bag 50
Can reduce pain and reduce the risk of injury when the corner hits the body.

The body exterior portion 54 may be manufactured by any processing method as long as it can form the above-described shape, but is preferably manufactured by drawing. In a method usually used for manufacturing a body exterior part of a bag using a conventional aluminum laminated composite plate, since the aluminum laminated composite plate is fitted into an aluminum mold and molded, a corner is formed at the edge of the bag. However, the manufacturing method by drawing has an advantage that the ridge of the bag can be easily formed into a round shape as described above.

The body exterior part 54 is provided with an opening / closing tool 56 on the same outer surface as the outer surface on which the gripping part 53 is provided, so that the body part 51 and the lid part 52 can be attached and detached and the bag 50 can be opened and closed.
Are provided. Note that the opening / closing tool 56 can be attached after drawing the stainless laminated composite plate and then processing the drawn stainless laminated composite plate separately.

The main body interior part 55 is a member that forms the inner shell of the main body part 51 and directly holds the contents accommodated in the bag 50. The main body interior portion 55 absorbs the shocking force, static pressure, or heat applied to the main body exterior portion 54 or the heat transmitted into the bag 50, so that the contents stored in the bag 50 can be removed. It has a function to protect against these effects.

The main body interior portion 55 is formed of a melton material, and is provided inside the main body exterior portion 54 so as to cover the inner peripheral surface of the main body exterior portion 54. The thickness of the main body interior portion 55 depends on the purpose of use of the bag 50 and the properties of the contents, and the like.
The function can be appropriately determined so that the function of the main body interior portion 55 is effectively exerted. In addition, the type of the melton material is not particularly limited as long as the main body interior portion 55 can exhibit the function, and can be appropriately determined.

Further, the main body interior portion 55 is provided with a box-shaped container 57 for holding the contents inside the bag 50 and a hook-and-loop fastener or the like capable of fixing the contents inside the bag 50. Fixture consisting of two strips that can be connected to
8 are provided. The accommodation tool 57 is formed of a melton material of the same quality as the melton material used for the main body interior 55, and the fixing tool 58 is formed of, for example, a synthetic resin.

[0056] The lid portion 52, hinge (not shown) by openable and closable to the main body portion 51, in the closed state, the lid portion 52 to form the housing portion of the bag 50, also contained goods A sealed space that can be accommodated is formed inside the bag 50. The lid part 52 has a lid exterior member 59 and a lid interior member 60.

The lid exterior part 59 forms the outer shell of the lid part 52, and houses the lid interior part 60 therein. The cover exterior member 59 is formed by the stainless steel laminated composite plate,
It has the same function as the above-mentioned function of the main body exterior part 54.

Regarding the thickness of the stainless steel laminated composite plate forming the cover exterior part 59, the thickness of the stainless steel plate and the core material used for the stainless steel laminated composite plate, and the type of the stainless steel plate, It can be determined as in the case. The lid exterior part 59 has a rounded ridge for the same reason as the body exterior part, and is preferably manufactured by drawing.

The lid interior part 60 forms the inner shell of the lid part 52, and the contents accommodated in the bag 50 are transferred to the main body interior part 55.
It is a member to be held together with. The main body interior part 55 has the same function as the function of the main body exterior part 54.

The lid interior part 60 is formed of the same material as the melton material used for the main body interior part 55,
It is provided inside the lid exterior part 59 so as to cover the inner peripheral surface of the lid exterior part 54. The conditions for the thickness of the lid interior part 60 and the melton material can be determined in the same manner as in the case of the main body exterior part 54.

The lid interior part 60 has a pocket-type storage case 61 capable of storing small items, and a storage part 61 for storing the storage separately from the storage in the main body 51. A bag device 62 with a chuck is provided. The storage case 61 and the bag 62 are made of, for example, synthetic resin or leather.

The grip 53 is a handle used when carrying the bag 50. The gripper 53 includes a gripper 63 and a fixing portion 64.
And The gripper 63 is a U-shaped member,
It is rotatably held by two fixing portions provided on the same outer surface as the outer surface of the main body exterior portion 54 on which the opening / closing member 56 is provided. The fixing portion 64 is made of metal and may be integrally formed with the main body exterior portion 54, or may be separately attached to the main body exterior portion 54 after the main body exterior portion 54 is formed. The grip 63 is made of, for example, a synthetic resin or a metal.

The bag 50 operates as follows. The contents are stored in the bag 50. The storage location of the stored item in the bag 50 is appropriately held by the storage device 57, the fixing device 58, the storage case 61, or the bag device 62 according to the size, properties, purpose of use, or the like of the stored item. Determined by location. The lid 52 is closed so that the opening / closing tool 56 does not open the lid 52. Thereafter, the bag 50 is transported, for example, by holding the grip 63 by hand.

Since the exterior of the bag 50 is formed by the stainless steel laminate composite plate, even if a large force or a large amount of heat is applied from the outside, the bag 50 is not easily broken or deformed. Is difficult to communicate. Therefore, in the bag 50, even if such an external action is applied, the damage to the contents inside the bag 50 is small.

More specifically, when a shocking force is applied to the bag 50 from the outside, for example, when the bag 50 is dropped from a high place, or when the bag 50 is intentionally destroyed, Even when the player 50 hits the bag 50, the bag 50 is less likely to be deformed or damaged than a conventional bag of the same type. When a static force is continuously applied to the bag 50 from the outside, for example, when a heavy object is left on the bag 50 for a long time, the bag 50 is compared with a conventional bag of the same type. Hard to deform or break. Further, when high heat is applied to the bag 50, for example, even when the bag 50 is left near the high-temperature body for a long time, the bag 50 is less likely to be deformed than a conventional bag of the same type.

As described above, since the stainless laminated composite plate has much higher resistance to force and heat than the aluminum laminated composite plate, the thickness required for exhibiting the predetermined resistance to force and heat is large. However, it is smaller than the aluminum laminated composite plate. Therefore, although the specific gravity of the stainless steel laminate composite plate is greater than that of the aluminum laminate composite plate, the bag 50 which is a bag manufactured using the stainless steel laminate composite plate as an exterior member has the same resistance as the bag 50. The weight is reduced as compared with a bag manufactured by using an aluminum laminate composite plate having a property and a size as an exterior member. As described above, the bag 50 has high strength against external force and heat, and can be further reduced in weight. Therefore, the bag 50 can reduce labor for transportation.

Since the bag 50 has a rounded ridge, the pain is small even if the ridge hits the body.
In addition, even if the bag 50 is accidentally hit by another person, the risk of injury to the other party is low.

As a method for manufacturing the bag 50, a manufacturing method similar to a conventional method for manufacturing a bag of the same type can be used. As described above, it is preferable that the main body exterior part 54 and the lid exterior part 59 be manufactured by drawing.

The structure of the bag according to the present invention is not limited to the structure of the bag 50, and can be appropriately changed according to the purpose.

The bag 50 has a rectangular parallelepiped shape whose height is smaller than its width and depth, but the shape of the bag according to the present invention is a rectangular parallelepiped shape whose height is larger than its width and depth. And may be, for example, cylindrical or prismatic.

The bag 50 employs a lid type as the opening and closing style. However, the opening and closing style of the bag according to the present invention may be other styles, for example, a door type or a door type.

Various components can be provided on the exterior member of the bag according to the present invention in order to improve the convenience in handling. For example, casters can be attached in order to enhance the convenience in transportation. . The exterior member of the bag according to the present invention can be subjected to various processes in order to improve convenience in handling. For example, in order to impart air permeability to the bag, a ventilation hole is formed in the exterior member. Or
In order to observe the inside from the outside of the bag, a hole or window for observation is provided on the exterior member, or a hole for work is provided on the exterior member so that work can be performed inside from the outside of the bag. Or you can.

In the bag 50, the grip is provided on the exterior of the main body, but in the present invention, the installation position of the grip may be provided on a portion other than the exterior of the main body. It may be provided. If it is not necessary for handling, it may not be provided.

The bag exterior member according to the present invention includes:
Various processing on the design that is applied to the same kind of bag,
For example, embossing, mirror finishing, and etching can be performed.

The material used for the interior member of the bag according to the present invention may be any material other than the melton material as long as protection suitable for the purpose of the contents can be provided. Materials can be used. As a method of using such a cushioning material, for example, a cushioning process in which the cushioning material is provided in a layered manner on all or a part of the inner peripheral surface of the exterior member, and the above-described method having a recess adapted to the shape of the container. There is a rudder process in which a cushioning material is provided in the exterior member so as to fill the hollow portion of the exterior member. In the present invention, the interior member may not be provided if it is not necessary for handling.

The bag according to the present invention can be manufactured by the same manufacturing method as a conventional bag of the same type. For example, as a method of manufacturing the exterior member, a bag may be manufactured by assembling a plurality of flat stainless steel laminated composite plates into a box shape using various frames, in addition to the drawing process.

The luggage according to the present invention is not particularly limited in its application as long as it can exhibit the above functions, and can be used, for example, for housing communication equipment, OA equipment, audio equipment, and photographing equipment. In particular, in consideration of the excellent mechanical protection of the bag according to the present invention based on the high mechanical strength, the bag according to the present invention is preferably used for carrying sophisticated equipment such as a personal computer. Can be.

[0078]

【The invention's effect】

In the bag according to the present invention, since the exterior portion is formed of a stainless steel laminated composite plate, even if a large force or a large amount of heat is applied from the outside, the bag is unlikely to be broken or deformed, and the inside of the bag is not easily damaged. It is difficult to transmit power and heat,
The damage to the contents inside is small. Therefore, the bag according to the present invention and the contents thereof are not easily broken even when subjected to external force and heat.

Since the stainless laminated composite plate is much more resistant to force and heat than the aluminum laminated composite plate, the bag according to the present invention was manufactured using the aluminum laminated composite plate as an exterior member. it can be light in weight as compared with the bag. Therefore, the bag according to the present invention can reduce labor for transportation. Also,
The bag according to the present invention can secure a predetermined strength even when the exterior member is thin, so that the bag can be reduced in size accordingly.

In the bag according to the present invention, by forming the ridge portion round, the pain is small even when the ridge portion hits the body, and the risk of injury to others is low. Such forming can be suitably performed by using drawing.

Since the bag according to the present invention can be manufactured without using a special manufacturing method, the productivity can be increased.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a manufacturing process of a stainless laminated composite plate.

FIG. 2 shows a foaming step for an unfoamed material, a continuous extrusion step thereof, a bonding step of supplying an adhesive resin film to a sheet-like core material extruded by the continuous extrusion step, and a coil-shaped pole. Processing of thin stainless steel sheet, supply of ultra-thin stainless steel sheet to the front and back of sheet-shaped core material, heat and pressure bonding, additional heat treatment by roll, cooling, lamination of surface protection film, and fixed size cutting It is an outline side view of the processing device shown.

FIG. 3 is a side view showing each part of a compounding machine, a continuous extruder, an extruder and a continuous cooling roll in the processing apparatus of FIG.

FIG. 4 is a plan view showing components of a compounding machine, a continuous extruder, an extruder, and a continuous cooling roll in the processing apparatus of FIG. 2;

FIG. 5 is a front view of a bag 50.

FIG. 6 is a left side view of the bag 50.

FIG. 7 is a plan view of the bag 50. FIG.

FIG. 8 is a perspective view of the bag 5 with the lid of the bag 50 opened.
FIG.

[Explanation of symbols]

11 ... blender, 12 ... continuous extruder, 13 ... extruder, 14 ... continuous cooling roll, 15 ... heat pressing apparatus, 16-1 ... heating roller, 16-2 ... heating roller, 16-3: Heating roll, 17-1: Cooling roll, 17-2: Cooling roll, 17-3: Cooling roll, 18: Laminating device, 19: Cutting device, 21
..Film supply machine, 31.Process, 32..Lamination machine, 33..Roll, 34.Roll, 41.Roll, 42.Roll, 50.Bag, 51.Body part, 5
2 ··· lid, 53 · · · grip, 54 · · · exterior member,
55 ··· Interior parts of the body, 56 ··· Opening and closing tools, 57 ·············································································································· , 63 ··· gripper, 64 ··· fixed part, C · · · sheet core material, F · · ·
Adhesive resin film, F '... Adhesive resin film, CS
・ Stainless steel roll material, SS ・ ・ Stainless steel plate, SC
Stainless steel laminated composite board, ACA aluminum laminated composite board

Claims (5)

[Claims] 1. A high-density polyethylene and a low-density polyethylene are mixed, and a high-temperature foaming agent and a low-temperature foaming agent are added to the mixture, followed by heating and foaming. It is characterized by having an exterior member formed from a laminated composite plate obtained by hot-pressing and adhering a thin stainless steel material via a bonding resin film to the surface of a sheet-shaped core material mainly dispersed and distributed. bag. 2. The bag according to claim 1, wherein the exterior member is formed by drawing from the laminated composite plate. 3. The bag according to claim 2, wherein the exterior member has a box shape. 4. The bag according to claim 3, wherein the exterior member has a rounded shape at a corner. 5. The bag according to claim 1, which is for a personal computer.