JP7049710B2 - Impact absorber - Google Patents

Description

The present invention relates to a shock absorber, a corrosion inhibitor, and a heat insulating material.

Conventionally, it has been known to use polyurea resin molded products for automobile parts such as bumpers, fenders, and side moldings for the purpose of reducing the weight or improving the durability of automobiles (see, for example, Patent Document 1). However, since the polyurea resin is hard, it is difficult to cut and use the polyurea resin molded product according to the object. Therefore, it has been difficult to easily use the polyurea resin molded product as a shock absorber, a corrosion inhibitor, or a heat insulating material.

Japanese Unexamined Patent Publication No. 07-090174

It is desirable that the impact absorber containing the polyurea resin, the corrosion inhibitor, and the heat insulating material be easily cut to an appropriate size according to the object.

In the first aspect of the present invention, a shock absorbing material including an adhesive tape portion, a base material, and a polyurea resin layer is provided. The base material may be laminated on the adhesive tape portion. The polyurea resin layer may be laminated on the substrate. The polyurea resin layer may be divided into a plurality of regions by a cut.

The polyurea resin layer and the base material may be divided into a plurality of regions by the cut.

A protective film attached to the adhesive surface of the adhesive tape portion may be provided. The shock absorber may be wound into a roll.

The base material is one or more types of base materials selected from the group consisting of foamed synthetic resin, carbon fiber, polyadmido-based synthetic fiber, silicate fiber, basalt fiber, high-blend thin film sheet of inorganic substance powder, and cellulose nanofiber. May include.

The base material may include a first base material of the foamed synthetic resin and a second base material. The second base material may be laminated on the first base material. The second substrate contains one or more substrates selected from the group consisting of carbon fibers, polyadmido-based synthetic fibers, silicate fibers, basalt fibers, high-mix thin film sheets of inorganic substance powder, and cellulose nanofibers. good.

In the second aspect of the present invention, there is provided a corrosion inhibitor having an adhesive tape portion, a base material, and a polyurea resin layer. The base material may be laminated on the adhesive tape portion. The polyurea resin layer may be laminated on the substrate. The polyurea resin layer may be divided into a plurality of regions by a cut.

In the third aspect of the present invention, there is provided a heat insulating material including an adhesive tape portion, a base material, and a polyurea resin layer. The base material may be laminated on the adhesive tape portion. The polyurea resin layer may be laminated on the substrate. The polyurea resin layer may be divided into a plurality of regions by a cut.

In the fourth aspect of the present invention, there is provided a method for manufacturing a shock absorbing material to be attached to an object. The shock absorbing material may include an adhesive tape portion, a base material laminated on the adhesive tape portion, and a polyurea resin layer laminated on the base material. The polyurea resin layer may be divided into a plurality of regions by a cut. The method of manufacturing a shock absorber may include a step of inputting information about the moving speed of the object to which the impact absorber is attached in a situation where the object is used. In the manufacturing method, based on the input information, the amount of the polyurea resin injected onto the surface of the base material is increased so that the thickness of the polyurea resin layer laminated on the base material increases as the moving speed of the object increases. It may be equipped with a stage of control. Further, the manufacturing method may include a step of forming so that the width and thickness of the cut increase as the thickness of the polyurea resin layer increases.

It is a figure which shows an example of the shock absorbing material 100 of the 1st Embodiment of this invention. It is a figure which shows another example of a shock absorber 100. It is a figure which shows an example of the shock absorbing material 100 of the 2nd Embodiment of this invention. It is an exploded perspective view of the shock absorbing material 100. An example of the manufacturing method of the shock absorbing material 100 is shown. It is a figure which shows an example of the shock absorbing material 100 in the state of being wound into a roll shape.

Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention within the scope of the claims. Also, not all combinations of features described in the embodiments are essential to the means of solving the invention.

FIG. 1 is a diagram showing an example of a shock absorbing material 100 according to a first embodiment of the present invention. The impact absorbing material 100 is cut into an appropriate size according to the object and attached to the surface of the object whose impact resistance is to be improved. For example, the shock absorber 100 is attached to the surface of the moving device. The mobile device includes various devices such as a vehicle, a hospital mobility support system, an electric cart for the elderly, and a golf cart.

The in-hospital mobility support system is a self-propelled vehicle used for patients to board and move in the hospital. The in-hospital mobility support system automatically transports the patient to the destination at a speed of, for example, 1.2 km / h or more and 1.8 km / h or less. The electric cart for the elderly is a kind of electric wheelchair, and is widely used as an auxiliary tool for moving at a speed of about 6 km / h. The golf cart travels at a medium speed of 30 km / h or less and is used as a means of transportation in a golf course.

Further, the shock absorbing material 100 may be attached to the inner surface or the outer surface of a box body such as a container. The shock absorbing material 100 may be attached to the bottom surface or the front surface of footwear such as slippers. The shock absorbing material 100 may be attached to the surface of a fitting such as a helmet. However, the object to which the shock absorbing material 100 is attached is not limited to these moving devices, boxes, footwear, and fittings.

The shock absorbing material 100 includes an adhesive tape portion 10, a base material 20, and a polyurea resin layer 30. The adhesive tape portion 10 includes a tape body 12, a first adhesive layer 14, and a second adhesive layer 16. The first adhesive layer 14 is an adhesive layer applied to one surface of the tape body 12, and provides an adhesive surface for attaching the shock absorbing material 100 to the object. The second adhesive layer 16 fixes the adhesive tape portion 10 and the base material 20 of the shock absorbing material 100. The tape body 12 may be made of a flexible material.

The base material 20 is laminated on the adhesive tape portion 10. In this example, the base material 20 is laminated on the upper surface of the adhesive tape portion 10. Specifically, the base material 20 is fixed to the adhesive tape portion 10 by the second adhesive layer 16 of the adhesive tape portion 10. The base material 20 is one or more kinds of base materials selected from the group consisting of foamed synthetic resin, carbon fiber, polyadmido-based synthetic fiber, silicate fiber, basalt fiber, inorganic substance powder high compound thin film sheet, and cellulose nanofiber. May include.

When the base material 20 is a foamed synthetic resin, the synthetic resin forming the base material 20 may be a polymer compound. As a more specific example, the synthetic resin forming the substrate 20 is formed of one or more materials selected from polystyrene, polyethylene, polypropylene and polyurethane. The foamed synthetic resin refers to a resin in which fine bubbles are dispersed in these synthetic resins. In one embodiment, the substrate 20 is made of expanded polystyrene (expanded polystyrene).

Further, the base material 20 may be fibers such as carbon fiber, polyadmido-based synthetic fiber (aramid fiber), silicate fiber (glass fiber), and basalt fiber. Further, the base material 20 may be a thin film sheet containing a high amount of inorganic substance powder. The inorganic substance powder high compound thin film sheet is called stone paper (stone paper) or LIMEX (registered trademark). The thin film sheet containing a high amount of inorganic substance powder is, for example, a mixture of 56% by weight or more and 80% by weight or less of calcium carbonate powder, 18% by weight or more and 43% by weight or less of polyethylene resin, and 1% by weight or more and 2% by weight or less of additives. It is a sheet formed into a thin film by an inflation type extruder.

The base material 20 may be a sheet made of cellulose nanofibers. Cellulose nanofibers are the basic skeletal material of plants. In the cell wall of a plant, there are cellulose nanofibers in which several cellulose microfibrils (single cellulose nanofibers) having a width of about 4 nm are gathered and bundled. As the base material 20, a base material obtained by molding an aggregate of cellulose nanofibers into a sheet or a base material obtained by mixing cellulose nanofibers and a resin to form a resin composite may be used. Since the cellulose nanofibers have a strength five times or more that of steel, the strength of the base material 20 can be increased.

The polyurea resin layer 30 is laminated on the base material 20. The polyurea resin layer 30 is made of a polyurea resin. The polyurea resin is, for example, a resin having a urea bond formed by a chemical reaction between isocyanate and an amino group. As an example, a polyurea resin is formed by reacting a polyisocyanate with a polyamine. In this example, the polyurea resin layer 30 is laminated on the upper surface of the base material 20. The upper surface of the base material 20 means a surface opposite to the surface where the base material 20 is in contact with the adhesive tape portion 10.

The polyurea resin layer 30 of this example is divided into a plurality of regions by a cut 32. With reference to the XYZ Cartesian coordinate system, the adhesive tape portion 10, the base material 20, and the polyurea resin layer 30 are laminated with the Z-axis direction as the lamination direction. In this example, the cut 32 is formed along the Y direction orthogonal to the Z-axis direction, which is the stacking direction. In this example, a plurality of cuts 32 are formed so as to be orthogonal to the longitudinal direction (X-axis direction) in which the shock absorbing material 100 extends. The spacing between adjacent cuts 32 may be the same or different.

According to the shock absorbing material 100 of this example, a plurality of cuts 32 are formed in advance in the polyurea resin layer 30 which is difficult to cut by a cutter or the like. Therefore, the user can cut the shock absorbing material 100 at the portion of the cut 32 by an instrument such as a cutter. By selecting the cutting portion from the plurality of cuts 32, the impact absorbing material 100 containing the polyurea resin can be cut into an appropriate size according to the object.

The shock absorbing material 100 of this example is provided with an adhesive tape portion 10. Therefore, the shock absorber 100 cut to an appropriate size according to the object can be attached to the surface of various objects, and the impact resistance of the object can be enhanced. Specifically, it can be attached to the surface of various articles such as the front surface of a moving device, the back surface of footwear, the inner surface of a container, and the surface of a fitting to enhance the impact resistance of these articles. The surface of the shock absorber 100 may be coated with a fluorescent paint or a luminous paint. As a result, the shock absorbing material 100 can improve not only the shock absorbing material but also the visibility.

In the example shown in FIG. 1, the polyurea resin layer 30 is laminated on the upper surface of the base material 20, and the side surface of the base material 20 is exposed. However, unlike this case, the polyurea resin layer 30 may cover even the side surface of the base material 20. The polyurea resin layer 30 covers up to the side surface of the base material 20 to increase the strength of the shock absorber 100. In this case, the cut 32 is formed up to the portion of the polyurea resin layer 30 existing so as to cover the side surface of the base material 20.

The structure shown in FIG. 1 can be applied not only as a shock absorbing material but also as a corrosion inhibitor or a heat insulating material. That is, the adhesive tape portion 10, the base material 20 laminated on the adhesive tape portion 10, and the polyurea resin layer 30 laminated on the base material 20 are provided, and the polyurea resin layer 30 is divided into a plurality of regions by the cut 32. The configured configuration may be a corrosion inhibitor or a heat insulating material.

FIG. 2 is a diagram showing another example of the shock absorber 100. In the shock absorber 100 of this example, the base material 20 includes a first base material 21 and a second base material 22. The second base material 22 is laminated on the first base material 21. The first base material 21 and the second base material 22 are made of different materials. In this example, the first base material 21 may be a base material of a foamed synthetic resin. The second base material 22 contains one or more types of base materials selected from the group consisting of carbon fibers, polyadmido-based synthetic fibers, silicate fibers, basalt fibers, thin film sheets containing a high amount of inorganic substance powder, and cellulose nanofibers. It's fine.

In particular, the first base material 21 may be a foamed synthetic resin and the second base material may be cellulose nanofibers. The strength can be increased by the cellulose nanofibers while absorbing the impact by the first base material 21 made of the foamed synthetic resin having abundant elasticity.

The base material 20 may be selected according to the properties of the object to which the shock absorbing material 100 is attached. The thickness of the polyurea resin layer 30 may be determined or the presence or absence of the fluorescent paint may be determined depending on the properties of the object to which the shock absorbing material 100 is attached.

Table 1 shows a list of the base material 20, the thickness of the polyurea resin layer 30, and the presence or absence of the fluorescent paint according to the object. However, Table 1 is an example and is not limited to the case of Table 1.

When the shock absorber 100 is applied to a moving device such as an in-hospital moving system, an electric cart for the elderly, and a golf cart, a first base material such as foamed cellulose is used so as to withstand the impact caused by a collision during moving. It is desirable to select a base material 20 in which 21 and a second base material 22 such as cellulose nanofibers are laminated. In the case of a moving device having a speed of 2 km / h or less such as an in-hospital moving system, the thickness of the polyurea resin layer 30 may be 0.2 mm or more and 0.5 mm or less. In the case of a moving device having a speed of 2 km / h or more and 10 km / h or less, such as an electric cart for the elderly, the thickness of the polyurea resin layer 30 may be 0.5 mm or more and 0.1 mm or less, and the speed may be 0.5 mm or more, like a golf cart. In the case of a moving device having a speed of 10 km or more and a speed of 30 km / h or less, the thickness of the polyurea resin layer 30 may be 1 mm or more and 1.5 mm or less. It is desirable to increase the thickness of the polyurea resin layer 30 as the moving speed increases.

When the main purpose is corrosion prevention and internal heat insulation effect rather than the purpose of impact mitigation, such as when affixed to the inner surface of a container, that is, when a polyurea resin molded product is used as a corrosion prevention material or a heat insulating material. It is desirable to use a single-layer base material of foamed synthetic resin as the base material 20. For example, Styrofoam can be used as the base material 20. When the adhesive surface of the object such as the back surface of footwear is a fiber, the base material 20 is a fiber such as a carbon fiber, a polyadmido-based synthetic fiber (aramid fiber), a silicate fiber (glass fiber), and a basalt fiber. You may select the type. When the object is a mounting tool such as a helmet, a thin film sheet containing a high amount of inorganic substance powder may be used as the base material 20.

FIG. 3 is a diagram showing an example of the shock absorbing material 100 according to the second embodiment of the present invention. In the shock absorber 100 of this example, a cut 24 is also formed in the base material 20. That is, the polyurea resin layer 30 and the base material 20 are divided into a plurality of regions by the cut 32 and the cut 24. The cut 24 may completely penetrate from the front surface to the back surface of the base material 20, and the cut may be made to a predetermined position in the thickness direction (Z direction) between the front surface and the back surface of the base material 20. 24 may be formed. The shock absorber 100 of this example has the same structure as that of the first embodiment shown in FIGS. 1 and 2 except that a cut 24 is also formed in the base material 20.

The cut 32 formed in the polyurea resin layer 30 and the cut 24 formed in the base material 20 have the same positions (X-direction position and Y-direction position) when viewed from the upper surface direction (Z direction) of the shock absorber 100. May be. Depending on the type of the base material 20, it may be difficult to cut not only the polyurea resin layer 30 but also the base material 20. According to this example, since the cut 24 is also formed in the base material 20, the user can cut the shock absorbing material 100 at the cut 32 and the cut 24 by an instrument such as a cutter. By selecting the cutting location, the impact absorbing material 100 containing the polyurea resin can be cut to an appropriate size according to the object.

FIG. 4 is an exploded perspective view of the shock absorbing material 100. As shown in FIG. 4, the adhesive tape portion 10 may be provided with a break portion 18. The fractured portion 18 includes, for example, a plurality of small holes arranged linearly. The broken portion 18 facilitates cutting of the adhesive tape portion 10 along the broken portion 18. The cut 32 of the polyurea resin layer 30, the cut 24 of the base material 20, and the broken portion 18 of the adhesive tape portion 10 are located at positions (X-direction position and Y-direction position) seen from the upper surface direction (Z direction) of the impact absorbing material 100. May be formed so that they are in the same position.

According to this example, since the shock absorbing material 100 has a cut 32 of the polyurea resin layer 30, a cut 24 of the base material 20, and a broken portion 18 of the adhesive tape portion 10, the entire shock absorbing material 100 can be applied according to the object. It will be easier to cut to the appropriate size.

The shock absorbing material 100 of the first and second embodiments described above can be manufactured as follows. After the base material 20 is formed of the foamed resin, the polyurea resin coating material is sprayed onto the surface of the base material 20 in the injection stage. In the drying stage, the polyurea resin is dried. As a result, the polyurea resin layer 30 is formed on the surface of the base material 20. A cut 32 is formed in the polyurea resin layer 30 by cutting. In the case of the second embodiment, the cut 32 is cut so as to penetrate the polyurea resin layer 30 and reach the base material 20 to form the cut 24. This completes the laminate of the base material 20 and the polyurea resin layer 30.

On the other hand, a tape body 12 formed to match the shape of the base material 20 is prepared. A broken portion 18 may be formed on the tape body 12. Next, an adhesive is applied to the surface of the tape body 12 to form the second adhesive layer 16. Next, of the laminated body of the base material 20 and the polyurea resin layer 30, the back surface of the base material 20 is arranged on the second adhesive layer 16 and bonded. As a result, the laminated body of the base material 20 and the polyurea resin layer 30 and the adhesive tape portion 10 are fixed to each other.

When the break portion 18 is formed in the tape body 12, the adhesive tape portion 10, the base material 20, and the polyurea resin layer are arranged so that the break portion 18 and the cut 32 (and the cut 24) are at the same position. After being aligned with the 30 laminated bodies, they are fixed. The first adhesive layer 14 is formed on the back surface side of the tape body 12. The first adhesive layer 14 provides an adhesive surface.

Instead of forming the cut 32 by cutting, the cut 32 may be formed by masking the portion of the cut 32 so as not to be coated with the polyurea resin. Further, instead of forming the cut 24 by cutting, it may be formed at the time of molding with a foamed resin.

The impact absorber 100 is produced in a shape and component suitable for the application of the impact absorber 100 (corrosion inhibitor or heat insulating material). The impact absorber 100 suitable for the application of the impact absorber 100 may be automatically selected. For example, when an application is input from a terminal, the type of the base material 20, the thickness of the polyurea resin layer 30, and / or the presence or absence of the fluorescent paint are determined according to the input application. A computer or the like connected to the manufacturing apparatus may include a database in which information on the type of the base material 20, the thickness of the polyurea resin layer 30, and / or the presence or absence of fluorescent paint is registered for each application. By referring to the database, the type of the base material 20, the thickness of the polyurea resin layer 30, and / or the presence or absence of the fluorescent paint may be automatically selected according to the application.

As the use, it is not necessary to input the specific type of the object. For example, as an application, information on the moving speed of an object is input. FIG. 5 shows an example of a method for manufacturing the shock absorbing material 100. First, information about the moving speed of the object is input (step S100). Specifically, information about the moving speed of the object to which the shock absorbing material 100 is attached is input. Next, based on the input information, the amount of the polyurea resin injected onto the surface of the base material 20 so that the thickness of the polyurea resin layer 30 laminated on the base material 20 increases as the moving speed of the object increases. Is controlled (step S200). As the injection amount increases, the thickness of the polyurea resin layer 30 increases. It should be noted that the base material 20 itself may be controlled to be changed based on the information on the moving speed of the object.

Next, the cut 32 may be formed so as to increase the width and thickness of the cut 32 as the thickness of the polyurea resin layer 30 increases (step S300). For example, as the thickness of the polyurea resin layer 30 increases, the cutting process is automatically controlled to increase the width and thickness of the cut 24. As an application, information on whether or not the object to which the shock absorbing material 100 is applied is for outdoor use may be input. If it is determined that the object is for outdoor use based on the information entered, fluorescent paint may be applied.

FIG. 6 is a diagram showing an example of the shock absorber 100 in a state of being wound into a roll. The shock absorber 100 shown in FIG. 5 includes a protective film 40 attached to the adhesive surface of the adhesive tape portion 10. The back surface of the first adhesive layer 14 of the adhesive tape portion 10 may be an adhesive surface. The protective film 40 may be detachably attached to the adhesive surface. When the shock absorbing material 100 is attached to an object and used, the protective film 40 is peeled off. In this example, the shock absorbing material 100 is wound into a roll so that the protective film 40 is on the inside to form the roll portion 120. However, not limited to this case, the shock absorbing material 100 may be wound in a roll shape so that the protective film 40 is on the outside.

When the shock absorbing material 100 is wound in a roll shape, it is easier to wind the material if the cut 24 is formed not only in the cut 32 of the polyurea resin layer 30 but also in the base material 20. However, when the base material 20 is a flexible material, the shock absorbing material 100 can be wound into a roll even if the base material 20 does not have a cut 24 formed. When the shock absorbing material 100 is wound in a roll shape, the user pulls out the shock absorbing material 100 from the roll portion 120 by the required size to make it an appropriate size according to the object. It can be cut and used. However, the shock absorbing material 100 is not limited to the one stored in a roll shape. The shock absorber 100 may be folded and stored.

In the above description, the case where the shock absorber 100 extends in the longitudinal direction (X direction) has been described, but the present invention is not limited to this case. The shock absorbing material 100 may spread in a plane along a plane (XY plane). In this case, the cut 32 (and the cut 24) may include not only a cut along the Y axis but also a cut along the X axis. That is, the polyurea resin layer 30 (and the base material 20) may be divided into a plurality of grid-like regions by the first cut along the X direction and the second cut intersecting the first cut.

The user can adjust not only the length in the X direction but also the width in the Y direction in the shock absorber 100. Therefore, the shock absorbing material 100 spread out in a plane can be separated and used so as to have an appropriate shape and size according to the object.

Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. Multiple embodiments can be combined with each other. It is also apparent to those skilled in the art that various changes or improvements can be made to the above embodiments. It is clear from the description of the claims that the form with such changes or improvements may be included in the technical scope of the present invention.

10 ... Adhesive tape part, 12 ... Tape body, 14 ... First adhesive layer, 16 ... Second adhesive layer, 18 ... Broken part, 20 ... Base material, 21 ... 1st base material, 22 ... 2nd base material, 24 ... cut, 30 ... polyurea resin layer, 32 ... cut, 40 ... protective film,
100 ... Impact absorber, 120 ... Roll part

Claims (3)

Adhesive tape part and
The base material laminated on the adhesive tape portion and
The polyurea resin layer laminated on the base material is provided.
The polyurea resin layer is divided into a plurality of regions by a cut, and the polyurea resin layer is divided into a plurality of regions.
The base material includes a first base material of a foamed synthetic resin and a second base material laminated on the first base material.
The second base material contains one or more types of base materials selected from the group consisting of carbon fibers, polyadmido-based synthetic fibers, silicate fibers, basalt fibers, thin film sheets containing a high amount of inorganic substance powder, and cellulose nanofibers. ,
Shock absorber. The polyurea resin layer and the base material are divided into a plurality of regions by the cut.
The shock absorbing material according to claim 1. A protective film attached to the adhesive surface of the adhesive tape portion is provided.
It is wound into a roll,
The shock absorbing material according to claim 2.

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