JP2009056157A - Shaving tool and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shaving tool which makes it possible to prevent peeling of a coated layer provided on a safety guard even if the shaving tool is used for a long period of time, and to maintain a good use feeling for a long time. <P>SOLUTION: The shaving tool is fitted with a safety guard which has slits 6 for exposing a cutting edge of the shaving tool at specified intervals and bridges 7 for covering the cutting edge in two or more positions. The safety guard has at least four layers of a safety guard body layer 10, an intermediate coating layer 9 for coating the body layer, an outside coating polymer layer 8 for coating the intermediate coating layer, and a thermal adhesion layer 11 for thermally bonding the intermediate coating layer and the outside coating polymer layer. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a razor tool and a manufacturing method thereof.

  In recent years, there has been proposed a razor tool suitable for use mainly when a woman shave hair on the face surface or prepares a line of eyebrows (Patent Documents 1-5).

  FIG. 1 schematically shows the appearance of such a razor tool as a typical one.

  This type of razor tool 1 includes a handle 2 for a user to hold by hand and a blade 3 attached to the tip of the handle 2. A portion of the blade 3 having a width of about 2/3 to 3/4 is embedded in the tip of the handle 2 (generally formed of synthetic resin).

  Usually, in such a razor tool 1, even if a user accidentally operates the razor tool 1 in a direction along the blade edge 3a while applying the blade edge 3a to the skin, the blade edge 3a is not damaged. A member called a safety guard 4 is fixedly mounted and the razor tool 1 is configured.

  As shown in FIGS. 2 and 3, the safety guard 4 is provided with an elongated bridge 7 extending in the lateral width direction on a stainless steel sheet 5 having a length shorter than the length of the cutting edge 3 a and formed in a thin plate shape. A plurality of slits 6 are punched along the longitudinal direction so as to form a large number.

  When the safety guard 4 is fixed and attached to the blade edge 3a, for example, as shown in FIG. 3, the stainless steel sheet 5 is bent at the intermediate portion in the horizontal width direction, and the tip 3b of the blade edge 3a is moved. The blade edge 3a is covered so as to be exposed, and both end portions in the width direction of the stainless steel sheet 5 are spot welded to both side surfaces of the blade 3 and attached.

  As shown in FIGS. 1 to 3, the safety guard in such a razor tool has a semicircular arc on both sides of a portion parallel to a direction orthogonal to the blade edge direction. For example, the dimension is such that the width A of the slit 6 parallel to the longitudinal direction of the stainless steel sheet 5 is about 0.5 to 6 mm, and adjacent slits are formed. The width B of the bridge 7 between 6 and 6 is formed to be about 0.1 to 1.5 mm.

  As described above, the safety guard 4 prevents the blade edge 3a from slipping by the bridges 7. Further, the tip 3b of the blade edge 3a is exposed without being covered with the safety guard 4, and by using the tip 3b of the blade edge 3a, a delicate work such as adjusting the line of each eyebrow is performed. Have been able to.

  The presence of this safety guard allows the user to use the razor tool with a sense of security and safety even when the blade is applied to the skin. Nerves can concentrate on the work itself of preparing the eyebrow line and removing the vellus hair using various razor tools such as the part and the way of applying.

  However, in order to enable young women who are relatively unfamiliar with the use of razor tools to be able to use them with more peace of mind, there has been a demand for razor tools that can provide even safer use.

  In particular, since the material constituting the safety guard 4 needs to expose the cutting edge 3a to a certain extent or more in order to exhibit its original function as a razor, as shown in FIGS. In addition, the bridge portion 7 of the safety guard 4 exists with a very small pitch and a very narrow width, and is folded at the central portion of the bridge portion 7 to be almost completely folded. Therefore, the bridge portion 7 of the safety guard 4 is required to have good durability in various points.

  For example, the important thing is that even when the period of use has progressed, the coating layer and the like from the main body layer of the safety guard are excellent in peel resistance so as not to peel off. That is, when such peeling occurs, a sharp shaving taste cannot be expected, and it becomes no longer difficult to perform the shaving as intended by the user. This is because the coating layer from which the blade edge 3a has been peeled is covered, and the exposed portion of the blade edge 3a is reduced, or the coating layer is peeled off and is present on the bridge 7 and the slit 6 so that the blade edge 3a is on the skin. It is difficult to shave for these reasons.

  In particular, this peel resistance is a problem that occurs between the body constituting the safety guard and the layer covering it, or between the layers to be covered. Is required to have good adhesiveness that does not peel off, as well as good folding workability, heat resistance, hot water resistance, detergent resistance, and repeated useability of each layer.

  On the other hand, as a feature of such a razor tool, it is difficult to focus on close eyes, such as using the upper eye, lower eye, and horizontal eye, and the use requires delicate movement. Or even if the line of sight is concentrated in a shaved area reflected on the mirror surface, or even in a relatively dark bathroom under these conditions of use. It was possible to appropriately place the existence, position, orientation, etc. of the razor in the consciousness, thereby realizing a razor that can be used more safely.

In view of such a point, the present inventors have, first, a blade attached to the tip of the handle, a slit that exposes the blade edge of the blade at a predetermined interval, and a bridge that covers the blade edge at a plurality of locations. A razor tool equipped with a safety guard, wherein the safety guard is formed from a material colored in chromatic color, and as a manufacturing method thereof, a color precoat stainless steel sheet or After punching a slit in an aluminum sheet,
(A) Bending at the intermediate portion in the width direction of the sheet, fitting the blade edge so as to cover from the front end portion to the vicinity of the base end portion, and fixing and mounting by a spot welding method;
Or
(B) After joining one side in the width direction of the sheet to the blade edge side by spot welding, the stainless steel sheet or aluminum sheet is bent at the intermediate portion in the width direction of the sheet, and the other side is made to the blade edge by spot welding. Fixing and wearing,
And a method for manufacturing a razor tool for attaching the blade to the handle was proposed (Japanese Patent Application No. 2006-191481).

  Although this razor tool was excellent in terms of safety as described above, the color layer of the color precoat / stainless steel sheet or aluminum sheet is subjected to slit punching processing, or the part where the electrode is applied during spot welding When the color layer is peeled off, the end face of the color layer is exposed, and when the razor tool is used, a force is applied to peel the color layer from the main body layer of the safety guard. Therefore, there was a concern that the color layer would peel off from the main body layer of the safety guard. Also, folding the center part of the color precoat / stainless steel sheet or aluminum sheet onto the blade also causes the safety layer to be easily peeled off at or near the bent part. For example, there is a concern that the color layer is easily peeled off due to the fact that the end face of the color layer is exposed.

  Once the color layer is peeled off, the visibility of the razor blade tip based on the color layer effect becomes ambiguous, and the desired safety effect and good shaving feeling are lost, or the peeled color layer However, it is not preferable because the sharp shaving feeling is lost by clinging to the blade edge.

  Further, in view of such points, the present inventors have previously provided a blade attached to the tip of the handle with a slit that exposes the blade edge of the blade at a predetermined interval, and a bridge that covers the blade edge at a plurality of locations. A razor tool equipped with a safety guard having at least 3 having a safety guard body layer, an intermediate coating layer covering the body layer, and an outer coating polymer layer covering the intermediate coating layer A razor tool having a layer structure and having either or both of the intermediate coating layer and the outer coating polymer layer colored in a chromatic color has been proposed (Japanese Patent Application No. 2007-111845).

  However, this proposal still has room for improvement in terms of peel resistance when the bridge of the safety guard is made thinner.

JP 2000-300787 A JP 2000-14945 A JP 2001-129273 A JP 2007-75496 A JP 2007-75497 A

  In view of the above-described points, the object of the present invention is that even if the period of use is advanced, the covering layer or the like is not easily peeled off from the main body layer of the safety guard, and a good feeling of use is prolonged. The object is to provide a razor that can be maintained over a period of time.

  Another object of the present invention is to provide a razor tool that can be used with a stronger sense of security and safety even by a young woman who is relatively unfamiliar with the use of the razor tool. Even if it is used by the naked eye, such as using the eyes, lower eyes, and horizontal eyes, or when the line of sight is concentrated on the shaved part reflected in the mirror surface, the razor It is possible to appropriately place the blade surface of the tool, the presence of the blade edge, its position and orientation in consciousness, which can contribute to safer use and such use over a long period of time. And a method of manufacturing such a razor tool.

The razor tool of the present invention that achieves the above-described object has the following configuration (1).
(1) A razor tool in which a safety guard having a slit that exposes a blade edge of the blade at a predetermined interval and a bridge that covers the blade edge at a plurality of locations is attached to the blade attached to the tip of the handle, A safety guard includes the safety guard body layer, an intermediate coating layer that covers the body layer, an outer coating polymer layer that covers the intermediate coating layer, and a thermal adhesive layer that thermally bonds the intermediate coating layer and the outer coating polymer layer. A razor tool comprising at least a four-layer structure.

Moreover, in the razor tool of this invention, More specifically, Preferably, it has the structure in any one of the following (2)-(8).
(2) The razor according to (1) above, wherein the safety guard has a thickness in the range of 10 μm to 250 μm, and the thermal adhesive layer has a thickness in the range of 1 to 100 μm.
(3) The razor according to (1) or (2) above, wherein the thermal adhesive layer is a thermoplastic polymer having a softening point of 50 ° C. or higher.
(4) The razor according to any one of (1) to (3), wherein the thermoplastic polymer is a polyester-based, acrylic-based, ethylene / vinyl acetate-based, or thermoplastic polyurethane-based polymer.
(5) The razor according to any one of (1) to (4) above, wherein the outer coating polymer layer is a layer made of a biaxially stretched polyethylene terephthalate film.
(6) The razor according to any one of (1) to (5) above, wherein one or both of the intermediate coating layer and the outer coating polymer layer that coats the intermediate coating layer is a colored layer. .
(7) The razor according to (6) above, wherein either one or both of the intermediate coating layer and the outer coating polymer layer that coats the intermediate coating layer is a colored layer colored in a chromatic color.
(8) The safety guard main body layer, an intermediate coating layer that covers the main body layer, an outer coating polymer layer that covers the intermediate coating layer, and a thermal adhesive layer that thermally bonds the intermediate coating layer and the outer coating polymer layer. The safety guide having at least a four-layer structure is formed by laminating a safety guide body layer with an intermediate coating layer and an outer coating film layer with a thermal adhesive layer under heating. The razor tool according to any one of (1) to (7) above.

Moreover, the manufacturing method of the razor tool of this invention which achieves the objective mentioned above consists of a structure of following (9).
(9) When manufacturing a razor tool by attaching a safety guard having a slit that exposes the blade edge of the blade at a predetermined interval and a bridge that covers the blade edge at a plurality of locations to the blade attached to the tip of the handle, The safety guard main body layer, the intermediate coating layer covering the main body layer, the outer coating polymer layer covering the intermediate coating layer, and the intermediate coating layer and the outer coating polymer layer were thermally bonded at a temperature of 50 ° C. or higher. A method for manufacturing a razor, comprising mounting using a safety guard having a four-layer structure of a thermal adhesive layer.

Moreover, in the manufacturing method of the razor tool of this invention, More preferably, it has the structure in any one of the following (10)-(14).
(10) The method for manufacturing a razor according to (9), wherein the outer coating polymer layer and the thermal adhesive layer are formed as an outer coating film layer with a thermal adhesive layer.
(11) The method for producing a razor according to (9) above, wherein one or both of the intermediate coating layer and the outer coating polymer layer that coats the intermediate coating layer is a colored layer. .
(12) The method for manufacturing a razor according to (11), wherein the colored layer is colored in chromatic color.
(13) A main body layer that is a stainless steel sheet or an aluminum sheet, an intermediate coating layer that coats the main body layer, an outer coating polymer layer that coats the intermediate coating layer, and thermal bonding between the intermediate coating layer and the outer coating polymer layer It is composed of at least a four-layer structure of a thermal adhesive layer, and a slit is punched into a color sheet in which one or both of the intermediate coating layer and the outer coating polymer layer are colored chromatically, and then,
(A) Folding at the intermediate portion in the width direction of the color sheet, fitting the blade edge so as to cover from the front end to the vicinity of the base end, fixing by spot welding, and mounting as a safety guard,
Or
(B) After joining one side in the width direction of the color sheet to the blade edge side by spot welding, the stainless steel sheet or aluminum sheet is bent at an intermediate portion in the width direction of the sheet, and the other side is spot-welded by spot welding. To be attached as a safety guard,
And further attaching the blade to the handle. The method for manufacturing a razor tool according to any one of the above (1) to (8).
(14) A main body layer that is a stainless steel sheet or an aluminum sheet, an intermediate coating layer that coats the main body layer, an outer coating polymer layer that coats the intermediate coating layer, and thermal bonding between the intermediate coating layer and the outer coating polymer layer It is composed of at least a four-layer structure of a thermal adhesive layer, and a slit is punched into a color sheet in which one or both of the intermediate coating layer and the outer coating polymer layer are colored chromatically, and then,
(A) Bending at the intermediate portion in the width direction of the color sheet, fitting the blade edge so as to cover from the front end to the vicinity of the base end, fixing with an adhesive, and mounting as a safety guard,
Or
(B) After joining one side of the color sheet in the width direction to the blade edge piece side with an adhesive, the stainless steel sheet or aluminum sheet is bent at an intermediate portion in the width direction of the sheet, and the other side is made into a blade edge with an adhesive. Fixed and attached as a safety guard,
And further attaching the blade to the handle. The method for manufacturing a razor tool according to any one of the above (1) to (8).

  According to the razor tool of the present invention according to claim 1, even if the period of use has progressed, the covering layer or the like is not easily peeled off from the main body layer of the safety guard, and a good feeling of use is maintained. A razor can be provided that can be maintained over time. In particular, by thermal bonding, for example, the outer coating polymer layer, which is a film layer, can be firmly integrated into the safety guard body and has sufficient durability. The problem is virtually non-existent.

  As a result, even in the case of a colored safety guard, which usually has a laminated structure of a plurality of layers, peeling of each layer becomes difficult to occur, and the advantages of the razor tool having the colored safety guard can be fully exhibited. It is.

  According to the razor tool of this invention in any one of Claims 2-5, the effect of this invention of Claim 1 mentioned above can be acquired more clearly.

  According to the razor tool of the present invention described in claim 6 or 7, even a young woman who is relatively unfamiliar with the use of the razor tool can be used with a stronger sense of security and specific safety, and the design. A razor tool that is good in terms of sex is also provided. In particular, even when using the naked eye, such as using the upper eye, lower eye, and horizontal eyes, where the focus is not close, or when the line of sight is concentrated on a shaved part reflected in the mirror surface. However, the blade surface of the razor tool, the existence of the blade edge, the position thereof, and the like can be appropriately placed in consciousness in real time, which can provide a razor tool that can contribute to safer use.

  According to the razor tool of this invention of Claim 8, the razor tool which has the effect of this invention as described in each claim of this invention mentioned above can be comprised easily.

  The razor tool of the present invention has various specific features in the above-described configuration, in particular, the razor tool using a colored safety guard has various specific features as compared with those using a conventional uncolored safety guard. Can be obtained at the time of use, for example, it is possible to give the razor tool an accent that is aesthetically pleasing, and at the time of use, it is easy to see the position of the blade edge, bringing safety and security to the user, In addition, it is convenient because it can be used as a sign (mark) such as distinction for each user or purpose for use according to the color. In particular, in the razor tool of the present invention, the colored layer is not peeled off. Since it does not occur easily, it can be used with long-term effects.

  According to the manufacturing method of the razor tool of this invention in any one of Claims 9-14, the process and workability | operativity are good for the razor tool concerning this invention mentioned above, and those management etc. are comparatively comparative. It can be manufactured under simple conditions.

  Hereinafter, the razor tool of the present invention will be described in more detail.

  The razor tool of the present invention is a slit that exposes the cutting edge 3a of the blade 3 at a predetermined interval on the blade 3 attached to the tip of the handle, similarly to the razor tool having the structure shown in FIGS. 6 and a safety guard 4 having a bridge 7 that covers the blade edge 3a at a plurality of locations. In particular, the safety guard 4 includes the safety guard body layer, an intermediate coating layer that covers the body layer, It is characterized by comprising at least a four-layer structure of an outer covering polymer layer for covering the intermediate covering layer and a thermal adhesive layer for thermally bonding the intermediate covering layer and the outer covering polymer layer.

  FIG. 5 illustrates an example of the structure of the safety guard 4. FIG. 5 (a) is a plan view and FIG. 5 (b) is a front view. The safety guard 4 is a safety view as viewed in the thickness direction. The guard main body layer 10, the intermediate coating layer 9 that covers the main body layer, the outer coating polymer layer 8 that covers the intermediate coating layer, and the thermal adhesive layer 11 that thermally bonds the intermediate coating layer 9 and the outer coating polymer layer 8 together. It has at least a four-layer structure.

  Thus, in the razor tool of the present invention, in particular, the safety guard 4 includes the safety guard main body layer 10, the intermediate coating layer 9 that covers the main body layer, the outer coating polymer layer 8 that covers the intermediate coating layer, and the The intermediate coating layer 9 and the outer coating polymer layer 8 are formed into four layers, ie, a heat bonding layer 11 for heat bonding, and in particular, the heat of the role of exclusively bonding the intermediate coating layer 9 and the outer coating polymer layer 8 by heat. By providing the adhesive layer 11, it can be positively prevented that each layer is peeled off.

  FIG. 5 (a) illustrates a state in which the long four-layer safety guard material sheet 12 is punched and the safety guard 4 is sequentially formed. In the final stage, the portion indicated by the dotted line in FIG. 5A is cut, and the safety guard 4 as shown in FIG. 2 is obtained.

  Usually, the cutting edge 3a to which the safety guard 4 is attached is not colored. In particular, the safety guard 4 having a colored layer colored, for example, in a chromatic color on the uncolored cutting edge 3a. By attaching the, it is possible to visually recognize the safety guard 4 and, consequently, the blade edge 3a and the safety guard 4 without difficulty, and be aware of the presence of the safety guard 4 and recognize the position and orientation of the blade edge 3a. Can be performed naturally and the user can feel ease of use.

  In the present invention, preferably, the thickness of the safety guard 4 is in the range of 10 μm to 250 μm, and the thickness of the thermal bonding layer is in the range of 1 to 100 μm. If the thickness of the safety guard is too thick, the force with which the cutting edge comes into contact with the skin becomes weak, and the feeling of shaving deeply becomes weak, which is not preferable.

  The material constituting the thermal adhesive layer 11 is capable of bonding and integrating the intermediate coating layer 9 and the outer coating polymer layer 8 by heating, and in the practical environment of a razor tool, peeling, exudation, skin acupuncture, etc. It is important to use one that does not cause this problem. Further, a thermoplastic polymer having a softening point of 50 ° C. or higher is preferable, and specifically, a polyester-based, acrylic-based, ethylene / vinyl acetate-based, or thermoplastic polyurethane-based polymer is preferable.

  In the present invention, the outer covering polymer layer 8 is preferably a layer made of a biaxially stretched polyethylene terephthalate film from the viewpoint of strength.

  In particular, in the present invention, the safety guard 4 has at least 4 a safety guard body layer 10, an intermediate coating layer 9 that covers the body layer, an outer coating polymer layer 8 that covers the intermediate coating layer, and a thermal bonding layer 11. By constituting from a layer structure and, in particular, by forming either one or both of the intermediate coating layer 9 and the outer coating polymer layer 8 as a colored layer, the main layer and the coated colored layer alone are relatively As compared with the case where the safety guard is formed with only two thick layers, each thickness can be reduced, so that the peeling force is less likely to act, and the colored layer is more than in the case of two or three layers. Is difficult to peel off.

  In particular, the safety guard 4 used in the present invention is provided with a large number of slits 6 as shown in FIG. 5, and 13 is performed by spot welding when the safety guard is attached to the cutting edge 3a. In this case, the electrode is applied, and both of the intermediate coating layer 9 and the outer coating polymer layer 8 are peeled off. Due to the presence of the slit 6 and the spot welding portion 13, the intermediate coating layer 9 and the outer coating layer 9 are removed. The portion where the end face of the covering polymer layer 8 is exposed is inevitably many, and thus the possibility of peeling is not low. However, as described above, the peeling is extremely peeled by using at least a four-layer structure. It becomes difficult.

  In the present invention, the body layer of the safety guard 4 is a layer that constitutes a main component of the safety guard, and mainly refers to a layer that contributes to the maintenance of the structure such as the strength of the safety guard itself. It is formed from a stainless steel sheet or an aluminum sheet. Or as long as intensity | strength and its structure maintenance are possible, it may be formed from the synthetic resin.

  The outer coating polymer layer 8 is preferably a synthetic resin film layer or a synthetic resin coating layer, and particularly preferably a layer made of a biaxially stretched polyethylene terephthalate film from the viewpoint of strength.

  The intermediate coating layer 9 is preferably a synthetic resin film layer or a synthetic resin coat layer.

  The most specifically preferred embodiment is formed by laminating the safety guide main body layer 10 with the intermediate coating layer 9 and the outer coating film layer 8 with the thermal adhesive layer 11 under heating, with the above-described four-layer structure. It has been made.

  According to the knowledge of the present inventors, the thickness of the entire safety guard is preferably in the range of 10 μm to 250 μm, more preferably in the range of 10 μm to 150 μm, in consideration of shaving comfort and safety. The best is 10 to 100 μm. The thickness of each of the intermediate coating layer 9 and the outer coating polymer layer 8 is such that the intermediate coating layer 9 is in the range of 4 to 100 μm, more preferably 4 to 50 μm. Moreover, it is preferable that the outer coating polymer layer 8 exists in the range of 2 micrometers-100 micrometers, More preferably, it is 2-50 micrometers.

  The thickness of the heat bonding layer 11 is preferably in the range of 1 μm to 100 μm, more preferably 2 to 75 μm, and most preferably 2 to 25 μm.

  The thermal adhesive layer can be formed by, for example, forming a desired thickness on the outer coating layer before lamination. Specifically, the thermal adhesive layer forming material is dissolved and applied in an appropriate solvent and dried. It can be formed by melt-extrusion or heat transfer of a layer formed on a release paper. Alternatively, it can be formed on the intermediate coating layer by the same means. Among them, it is preferable to form the outer coating layer with the thermal adhesive layer on the outer coating layer from the viewpoint of the entire manufacturing process.

  The heat-bonding layer is preferably a heat-bonding layer that can be softened by heat at 50 ° C. or higher when heat-bonded. A thermal adhesive layer that softens and adheres by heating at 70 ° C. or higher is more preferable, and a thermal adhesive layer that softens and adheres by heating at 140 ° C. or higher is most preferable.

  When each of the intermediate coating layer 9 and the outer coating polymer layer 8 is formed from a synthetic resin, various types of conventionally used synthetic resins can be used. For example, a thermosetting acrylic resin, a thermoplastic acrylic resin, It is preferable to use various resin materials such as polyester resin or polyurethane resin. In addition, since the razor tool of the present invention is also used to some extent as a disposable sensation, it is also preferable to use a biodegradable resin such as a polylactic acid resin, and this also applies to the handle. is there.

  The manufacturing method of the razor tool of this invention is demonstrated below.

  That is, the razor tool of the present invention is not particularly limited. For example, the blade attached to the tip of the handle is covered with a slit that exposes the blade edge of the blade at a predetermined interval and the blade edge at a plurality of locations. When manufacturing a razor tool with a safety guard having a bridge, a safety guard body layer, an intermediate coating layer covering the body layer, an outer coating polymer layer covering the intermediate coating layer, and the intermediate coating layer And the outer coating polymer layer can be manufactured by mounting using a safety guard having a four-layer structure of a heat-bonding layer in which heat-bonding is performed at a temperature of 50 ° C. or higher.

  In the manufacturing method of the razor tool of this invention, Preferably, what is formed as an outer coating film layer with a heat bonding layer is used as an outer coating polymer layer and a heat bonding layer.

  Preferably, an intermediate coating layer or an outer coating polymer layer that covers the intermediate coating layer is one in which either one or both are colored layers. In that case, it is more preferable to use a colored layer colored in a chromatic color.

  As a more specific and representative example of the manufacturing method of the razor tool of the present invention described above, the following method is preferable.

That is, a main body layer that is a stainless steel sheet or an aluminum sheet, an intermediate coating layer that covers the main body layer, an outer coating polymer layer that covers the intermediate coating layer, and heat that thermally bonds the intermediate coating layer and the outer coating polymer layer. It is composed of at least a four-layer structure of an adhesive layer, and either one or both of the intermediate coating layer and the outer coating polymer layer is punched into a slit in a chromatic color sheet, and thereafter,
(A) Folding at the intermediate portion in the width direction of the color sheet, fitting the blade edge so as to cover from the front end portion to the vicinity of the base end portion, fixing with spot welding or adhesive, and mounting as a safety guard,
Or
(B) After joining one side of the color sheet in the width direction to the blade edge side by a spot welding method, the stainless sheet or aluminum sheet is bent at an intermediate portion in the width direction of the sheet, and the other side is spot welded or bonded. Fixed to the cutting edge with a chemical agent and attached as a safety guard,
Further, the blade is attached to the handle.

  The color sheet before punching the slit is not particularly limited, but a rectangular four-layer color precoat with a width of 4 to 8 mm and a length of about 20 to 40 mm cut according to the dimensions of the safety guard. It is preferable to use a stainless sheet piece or a color precoat / aluminum sheet piece.

  The intermediate coating layer and the outer coating polymer layer need to be bent when a color sheet having a four-layer structure including them is attached to the blade edge. Therefore, these materials are suitable for the bending process. It is also important that the intermediate coating layer has good adhesion to the stainless steel substrate.

  Further, since the safety guard is also used as a constituent material of a part of the razor tool, the safety guard main body layer material, and further, the intermediate coating layer and the outer coating polymer layer material have water resistance, It is preferable to use one having chemical resistance such as detergent.

  Furthermore, the razor tool is preferably used repeatedly for a certain long period of time, and it is preferable that it has various characteristics such as weather resistance, durability, moisture resistance, heat resistance, etc. from the necessity for storage. It is.

  The “color” to be colored is not particularly limited, but is preferably a chromatic color for ease of visual recognition. A black or gray achromatic color is not preferable as a colored color because the visibility is not good.

  The pigment for coloring is not particularly limited, and according to the knowledge of the present inventors, a pigment having a bright and clear hue, such as red, pink, green, yellow, blue, light blue, purple, etc. It is preferable to use it for improving visibility.

  The thickness of the safety guard can be said to be safer as it is thicker, but from the viewpoint of acting the cutting edge, if it is too thick, the shaving performance is not good, and according to the knowledge of the present inventors, as described above, 10 μm The range of -250 micrometers is preferable, More preferably, it exists in the range of 30 micrometers-150 micrometers.

  Further, the width A of the slit 6 parallel to the longitudinal direction of the stainless sheet 5 and the lateral width B of the bridge 7 between the adjacent slits 6 and 6 shown in FIG. The former A is preferably within a range of about 0.5 to 6 mm. The latter B is preferably formed to have a thickness of about 0.1 to 3 mm, more preferably 0.1 to 1.5 mm, and most preferably 0.3 to 1.5 mm.

  According to various findings of the present inventors, for example, specifically, an SUS301 stainless steel sheet (main body layer) having a thickness of 50 μm is coated with an epoxy primer (primer) so as to have a thickness of 2 μm. Further, a blue topcoat layer (intermediate coating layer) made of polyester resin is coated to a thickness of 13 μm, and further a polyester film (outer coating polymer) with a thickness of 30 μm coated with an adhesive layer (5 μm thickness) The use of a colored pre-coated stainless steel sheet formed by laminating a layer) having a total thickness of about 100 μm has the above-mentioned various characteristics, and is less likely to cause cracks in the bent part due to the bending process. This is preferable because of its good adhesion to the stainless steel substrate.

  More specifically, structural examples such as stainless steel (main body layer) / primer layer / painted colored paint layer (intermediate coating layer) / adhesive layer / polymer film layer (outer coating polymer layer) are preferred.

  In this case, it is important that the intermediate coating layer and the outer coating polymer layer are configured to substantially cover the lateral width C of the slit shown in FIG. The lateral width of the slit is preferably in the range of 2.0 to 3.6 mm, more preferably 2.4 to 3.6 mm. And the width | variety of the film which is an outer coating polymer layer adds to the lateral width of a slit (one side), and the inside of the range of 0.1-5.0 mm is preferable, More preferably, it adds to the lateral width of a slit (one side). It is in the range of 0.3 to 3.0 mm. However, as shown in FIG. 5B, the film or coat layer that is the outer covering polymer layer 8 may be provided over the entire width of the long sheet 12 that is a raw material of the safety guard. It may be provided only for the entire width.

  In order to integrate the bent safety guard and the cutting edge, it is preferable to use various welding methods or various bonding methods, and particularly, spot welding or bonding with an adhesive is preferable.

  As the spot welding method, for example, the primer layer, the intermediate coating layer, the adhesive layer, and the outer coating polymer layer, which are to be spot welded, are partially covered with, for example, a circular shape having a diameter of about 3 mm. After that, an electrode having a tip diameter of about 2 to 3 mm is pressed from both sides of the safety guard from which the coating has been peeled, and a welding current is applied to the electrode for about 0.01 to several seconds. By energizing for the time required for welding, the metal base material of the blade and the safety guard can be welded and joined.

  As the adhesive, a heat-adhesive acrylic adhesive or the like can be used.

  Further, according to various findings of the present inventors, in particular, when a colored safety guard is used, the colored safety guard has a certain width or more in order to exert the effect due to that remarkably. It is preferable to be embedded in the handle so as to be continuously exposed in the entire length direction.

  FIG. 4 illustrates this, and is a schematic model diagram showing an enlarged mounting portion of the blade, which is the tip of the razor tool of the present invention. The blade (safety guard portion) shown in FIG. The colored safety guard has a distance W between the tip end position on the blade surface side of the handle and the end position of the slit, preferably 0.1 mm to 2.5 mm, more preferably 0.3 mm to 1.5 mm. It is preferable that it is exposed.

  In addition, when trying to integrate by an adhesive method using welding without applying welding, various adhesives are applied to the back of the stainless steel sheet, first joined on one side, then folded and other After performing the side-to-side adhesion integration processing, it is preferable to heat and cure as necessary.

  As a material for the main body layer of the safety guard, a thin steel plate, a stainless steel wire, an aluminum wire, or the like can be used in addition to the stainless steel or aluminum thin plate described above. In addition to the metal material, for example, a synthetic resin material such as a synthetic resin sheet such as a plastic film or a synthetic resin molding can be used.

  The handle for attaching the blade is not particularly limited, but it is preferable to use a synthetic resin. Since the handle part usually has a part covering the blade, and eventually a part covering the safety guard, it is translucent or transparent so that the color of the safety guard part is not hidden. For example, it may be composed of a resin molding using a simple synthetic resin. However, the pattern may be formed of a molded product of an opaque synthetic resin for further design effect and ease of visual recognition.

  Furthermore, the resin molded product constituting the handle may be either a translucent or transparent synthetic resin or an opaque synthetic resin, or may be colored. When is used, it is also preferable to use a resin molded product having the same color as the chromatic color and having a higher brightness.

  When the entire razor is colored with chromatic colors, it is easy to find the location where it is used when it is used in a bathroom or bathroom where the lighting is slightly dark, or when it is taken out from the storage such as a pouch. Therefore, it is possible to visually recognize the location, and the presence / absence is easily recognized, thereby improving safety and handling.

  Hereinafter, based on an Example, the specific structure and effect of the razor tool of this invention are demonstrated.

  In the present invention, the softening point is determined by the following method.

(1) Method for measuring softening point:
The softening point is based on the Vicat softening temperature measurement method defined in JIS K 7206.

(2) Adhesion test:
The adhesion was measured by a cross-cut method (so-called gobang eye test) defined in JIS K5600-5-6.

Example 1
A SUS301 stainless steel sheet with a thickness of 50 μm and a width of 19 μm, which is the main body layer of the safety guard, is coated with an epoxy primer (primer) to a thickness of 2 μm, and a yellow precoat topcoat made of acrylic resin on top. The layer was coated to a dry thickness of 15 μm and cured at 230 ° C. for 90 seconds to obtain a precoated stainless steel sheet with a yellow intermediate coating layer formed to a total thickness of about 67 μm.

  On the other hand, a biaxially stretched polyester film (thickness 12 μm) coated with an acrylic copolymer resin having a softening point of 70 ° C. to a thickness of 3 μm was used as an outer coating layer film with a thermal adhesive layer.

  These were laminated at a heating temperature of 140 ° C. at a laminator speed of 5 m / min to obtain yellow precoated stainless steel to which a polyester film was thermally bonded.

  The adhesion of the film of this material and the yellow intermediate coating layer was 100/100 as a result of the Gobang eye test, which was an acceptable level, and the bending workability was very good.

  This is punched into the slit shape shown in FIG. 5, and the four coatings to be spot welded are peeled and removed into a circular shape with a diameter of 2.5 mm, and bent at the center in the width direction with the non-coated surface side inside. The sheet was covered with the sheet and spot-welded.

  Applicability to manufacturing processes such as punching workability, spot weld hole peeling workability, bending workability, and spot weldability was satisfactory without problems.

  The obtained blade with a safety guard was fixed by being attached to a handle molded with a transparent resin.

  The razor tool according to the present invention thus obtained is generally used as a lighting for the bathroom by a panel of 5 young women. Used to remove vellus hair.

  When asked about the feeling of using the razor to the five panelists, the feeling of using the razor of the present invention is easy to check the position of the cutting edge during work, and it can be used safely despite the use of an unfamiliar blade, Moreover, the touch of the razor tool and the feeling of slipping on the skin surface were good, and the repeated durability was sufficient, and the guard coating layer was not peeled off by repeated use.

Example 2
A precoated stainless steel sheet with a yellow intermediate coating layer prepared in the same manner as in Example 1 is used.

  On the other hand, a biaxial polyester film (thickness 9 μm) coated with a thermoplastic polyurethane resin having a softening point of 100 ° C. to a thickness of 2 μm was used as an outer coating layer film with a thermal adhesive layer.

  These were laminated at a heating roller temperature of 140 ° C. and a laminator speed of 5 m / min to obtain yellow precoated stainless steel to which a polyester film was thermally bonded.

  The adhesion of the film of this material and the yellow intermediate coating layer was 100/100 as a result of the Gobang eye test, which was an acceptable level, and the bending workability was very good.

  A razor with a safety guard was prepared by the same process as in the example. There was no problem in the manufacturing process and the process applicability was excellent. The practicality of the obtained razor tool was evaluated in the same manner as in Example 1, and the same evaluation results were obtained.

Example 3
A SUS301 stainless steel sheet with a thickness of 50 μm and a width of 19 μm, which is the main body layer of the safety guard, is coated with an epoxy primer to a thickness of 3 μm, and a blue precoat topcoat made of acrylic resin / melamine resin on top. The layer was coated to a dry thickness of 15 μm and heated and cured at 210 ° C. for 120 seconds to obtain a precoated stainless steel sheet with a blue intermediate coating layer formed to a total thickness of about 68 μm.

  On the other hand, a synthetic rubber-based thermal adhesive sheet (thickness 50 μm) (AS-11 manufactured by Nitto Denko Corporation) and a biaxially stretched polyester film (thickness 12 μm) (# 12P025 manufactured by Toray Industries, Inc.) at 140 ° C., laminator Laminated at a speed of 5 m / min to obtain a blue pre-coated stainless steel to which a polyester film was thermally bonded.

  The adhesion and folding processability of this material were excellent. This was processed by the same process as in Example 1 to obtain a razor with a safety guard.

  The practical characteristics of this razor were excellent, and no problems occurred.

Example 4
As a safety guard, a 50 μm thick stainless steel sheet is coated on one side with an epoxy primer to a thickness of 2 μm, and a yellow topcoat layer made of polyester resin is coated on the surface to a thickness of 15 μm. A yellow pre-coated stainless steel sheet having a length of 30 mm and a width of 19 mm formed to 67 μm was obtained, with a heat-adhesive adhesive coated with a heat-adhesive thermoplastic polyurethane adhesive layer having a thickness of 10 μm and a softening point of 80 ° C. A polyester film coated precoated stainless steel sheet was used.

  A biaxially stretched polyester film (thickness: 12 μm) (total thickness: 22 μm) was heat-pressure bonded at a heating temperature of 140 ° C. to obtain a polyester film-coated yellow precoated stainless steel sheet. Apply a toluene solution of a heat-adhesive acrylic adhesive to the uncoated surface of the stainless steel sheet and dry it to form an adhesive layer with a thickness of 5 μm. The film-coated precoated stainless steel sheet was covered with a guard with a film-coated pre-coated stainless steel sheet on the edge of 34 mm in length, with the side not coated with the film facing inward, and fixedly mounted by heating. The obtained blade was attached and fixed to a handle formed of a transparent resin. The film process precoat stainless steel sheet had good manufacturing process adaptability such as folding workability.

  The test by the panel of the razor tool according to the present invention thus obtained was carried out in the same manner as in Example 1, and the same good results were obtained. Furthermore, compared with the product of the safety guard using the conventional precoated stainless steel sheet, The tactile sensation and slipperiness were good, and no defects were pointed out after repeated use, and its practical durability was sufficient.

Example 5
100 polyester film (film thickness: 12 μm) having a heat-adhesive acrylic adhesive layer with a softening point of 60 ° C. attached to the whole of a 50 μm-thick yellow pre-coated stainless steel sheet similar to that used in Example 1 to a thickness of 3 μm. A razor tool having a yellow color guard was obtained in the same manner as in Example 1 except that coating was performed at a thermocompression bonding temperature of 0 ° C.

  The manufacturing process adaptability was as good as in Example 1. Moreover, about the razor tool, the test by a paneler and the repeated use test were done like Example 1, and the same good result as Example 1 was obtained.

Example 6
A biaxially stretched polyester film (film) having an adhesive layer made of an ethylene vinyl acetate copolymer having a softening point of 55 ° C. attached to a yellow pre-coated stainless steel sheet having a thickness of 50 μm similar to that used in Example 1 with a thickness of 10 μm. A razor tool having a yellow color guard was obtained in the same manner as in Example 1 except that the thickness was 38 μm) was laminated by thermocompression bonding at a thermocompression bonding temperature of 120 ° C.

  The manufacturing process adaptability was as good as in Example 1. Moreover, about the razor tool, the test by a paneler and the repeated use test were done like Example 1, and the same good result as Example 1 was obtained.

FIG. 1 is a side view illustrating a schematic structure of a razor tool that has been conventionally used and can also be used in the present invention. FIG. 2 is a plan view showing an example of a safety guard used in a razor tool that has been conventionally used and can also be used in the present invention, and illustrates an unfolded state before being attached to the razor tool. is there. FIG. 3 is a side view illustrating a part of a razor tool that has been used in the past and that can also be used in the present invention, and illustrates a state in which the safety guard illustrated in FIG. is there. FIG. 4 is an enlarged schematic model diagram showing a portion where a blade which is a tip of the razor tool of the present invention is mounted. FIG. 5 illustrates an example of the structure of the safety guard 4 used in the razor tool of the present invention. FIG. 5 (a) is a plan view and FIG. 5 (b) is a front view. 5 (a) and 5 (b) show a state in which the long four-layer safety guard material sheet 12 is punched and the safety guard 4 is sequentially formed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Razor tool 2 Handle 3 Blade 3a Cutting edge 3b Tip part 4 Safety guard 5 Stainless steel sheet 6 Slit 7 Bridge 8 Outer coating polymer layer 9 Intermediate coating layer 10 Safety guard body layer 11 Thermal bonding layer 12 Long three-layer safety guard material sheet 13 Spot welding location A Width of slit 6 parallel to longitudinal direction of stainless sheet 5 B Width of bridge 7 between slits 6, 6 C Width of slit 6 W Wrapping of handle at blade (safety guard part) mounting part The distance between the tip position on the blade surface side and the end position of the slit

Claims (14)

  A razor tool in which a safety guard having a slit that exposes the blade edge of the blade at predetermined intervals and a bridge that covers the blade edge at a plurality of locations is attached to a blade attached to the tip of the handle, At least 4 of the safety guard body layer, the intermediate coating layer covering the body coating layer, the outer coating polymer layer coating the intermediate coating layer, and the thermal adhesive layer thermally bonding the intermediate coating layer and the outer coating polymer layer. A razor tool comprising a layer structure.   The razor tool according to claim 1, wherein the thickness of the safety guard is in the range of 10 µm to 250 µm, and the thickness of the thermal bonding layer is in the range of 1 to 100 µm.   The razor tool according to claim 1 or 2, wherein the thermal adhesive layer is a thermoplastic polymer having a softening point of 50 ° C or higher.   The razor tool according to any one of claims 1 to 3, wherein the thermoplastic polymer is a polyester-based, acrylic-based, ethylene-vinyl acetate-based, or thermoplastic polyurethane-based polymer.   The razor tool according to any one of claims 1 to 4, wherein the outer coating polymer layer is a layer made of a biaxially stretched polyethylene terephthalate film.   The razor tool according to any one of claims 1 to 5, wherein one or both of the intermediate coating layer and the outer coating polymer layer covering the intermediate coating layer is a colored layer.   The razor tool according to claim 6, wherein one or both of the intermediate covering layer and the outer covering polymer layer covering the intermediate covering layer is a colored layer colored in a chromatic color.   At least four layers of the safety guard main body layer, an intermediate coating layer that covers the main body layer, an outer coating polymer layer that covers the intermediate coating layer, and a thermal adhesive layer that thermally bonds the intermediate coating layer and the outer coating polymer layer. The safety guide having a structure is formed by laminating a safety guide main body layer with an intermediate coating layer and an outer coating film layer with a thermal adhesive layer under heating. The razor tool in any one of claim | item 1 -7.   When manufacturing a razor tool by attaching a safety guard having a slit that exposes the blade edge of the blade at a predetermined interval and a bridge that covers the blade edge at a plurality of locations to a blade attached to the tip of the handle, the safety guard body Layer, an intermediate coating layer for coating the main body layer, an outer coating polymer layer for coating the intermediate coating layer, and a thermal adhesive layer in which the intermediate coating layer and the outer coating polymer layer are thermally bonded at a temperature of 50 ° C. or more A method for manufacturing a razor tool, comprising mounting using a safety guard having a four-layer structure.   The method for manufacturing a razor according to claim 9, wherein the outer coating polymer layer and the thermal adhesive layer are formed as an outer coating film layer with a thermal adhesive layer.   The method for manufacturing a razor according to claim 9, wherein one of or both of the intermediate coating layer and the outer coating polymer layer that covers the intermediate coating layer is a colored layer.   The method for manufacturing a razor tool according to claim 11, wherein a colored layer is used as the colored layer. A main body layer that is a stainless steel sheet or an aluminum sheet, an intermediate coating layer that covers the main body layer, an outer coating polymer layer that covers the intermediate coating layer, and a thermal adhesive layer that thermally bonds the intermediate coating layer and the outer coating polymer layer And punching a slit into a color sheet in which one or both of the intermediate coating layer and the outer coating polymer layer are colored chromatically, and then,
(A) Folding at the intermediate portion in the width direction of the color sheet, fitting the blade edge so as to cover from the front end to the vicinity of the base end, fixing by spot welding, and mounting as a safety guard,
Or
(B) After joining one side in the width direction of the color sheet to the blade edge side by spot welding, the stainless steel sheet or aluminum sheet is bent at an intermediate portion in the width direction of the sheet, and the other side is spot-welded by spot welding. To be attached as a safety guard,
The method for manufacturing a razor tool according to claim 1, further comprising attaching the blade to a handle. A main body layer that is a stainless steel sheet or an aluminum sheet, an intermediate coating layer that covers the main body layer, an outer coating polymer layer that covers the intermediate coating layer, and a thermal adhesive layer that thermally bonds the intermediate coating layer and the outer coating polymer layer And punching a slit into a color sheet in which one or both of the intermediate coating layer and the outer coating polymer layer are colored chromatically, and then,
(A) Bending at the intermediate portion in the width direction of the color sheet, fitting the blade edge so as to cover from the front end to the vicinity of the base end, fixing with an adhesive, and mounting as a safety guard,
Or
(B) After joining one side of the color sheet in the width direction to the blade edge piece side with an adhesive, the stainless steel sheet or aluminum sheet is bent at an intermediate portion in the width direction of the sheet, and the other side is made into a blade edge with an adhesive. Fixed and attached as a safety guard,
The method for manufacturing a razor tool according to claim 1, further comprising attaching the blade to a handle.

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