Shank body for razor, and razor

Abstract

To provide a shank body for a razor which has a swinging mechanism and is made of paper.SOLUTION: A shank body for a razor has: a handle part; a mounting part which has a mounting surface for mounting a blade or a cartridge storing the blade, is connected to a tip side of the handle part through a first folded line, and is swingable with the first folded line as an axis; a back plate part which is connected to the mounting part through a second folded line arranged in parallel with the first folded line, and is folded in the second folded line and is positioned on a rear end side of the handle part rather than the mounting part; and a tongue piece part which is cut and raised from the handle part with the mounting part side as a tip, and generates plate spring elasticity by cutting and raising, wherein the back plate part folded in the second folding line is inserted between the cut and raised tongue piece part and the handle part, and the tongue piece part sandwiches the back plate part together with the handle part, and generates elastic energization against push-in to a base end side of the tongue piece part of the back plate part accompanied by swinging of the mounting part.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a handle for a razor and to a razor. [Background technology]

[0002] The razor has a head part to which a cartridge containing a metal blade in a resin case is attached, and a handle part for a user to hold and operate is integrated into a handle body. T The handle is usually made of hard plastic or metal, and many of them have a structure that is difficult to fold or disassemble, which requires a large volume to store them, and they have problems such as the need to secure storage space for storage and being inconvenient to carry.

[0003] In addition, lodging facilities such as inns and hotels sometimes provide disposable razors with plastic handles as amenities, but in recent years, issues such as marine pollution caused by microplastics have attracted attention, and a move away from plastic is progressing worldwide from the perspective of environmental protection. In Japan, the "Act on Promotion of Resource Recycling Related to Plastics" was enacted, which requires certain businesses, such as the hotel industry, to reduce disposable plastic products. In this "Act on Promotion of Resource Recycling Related to Plastics," plastic razors are designated as "products using specified plastics," and the move away from plastic in razors is attracting attention.

[0004] A razor with a paper handle formed by folding and assembling a thin sheet is proposed, for example, in Patent Document 1 below. This razor has a paper handle, and uses less plastic overall. It can also be transported and stored in sheet form, improving storability and portability. For example, it can be delivered in sheet form to a store or accommodation facility, stored in a back yard in sheet form, or assembled and used when needed. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 68458478 Summary of the Invention [Problem to be solved by the invention]

[0006] However, some razors with handles made of plastic or metal are equipped with a mechanism, also called a swivel head or swivel mechanism, in which the cartridge attached to the handle moves to follow the curved surface of the skin, and these are widely accepted by users.However, no razors that are formed by folding and assembling a thin sheet have such a swivel mechanism.

[0007] In the razor in Reference 1, the cartridge (razor head) is biased against the user's skin by the flexing of the handle, but the cartridge itself does not move; only the surface pressure between the cartridge and the skin changes.

[0008] Furthermore, the razor of Patent Document 1 requires multiple folding steps to form the handle portion of the handle, particularly the portion that is to be gripped, and further simplification of assembly is required.

[0009] SUMMARY OF THE PRESENT EMBODIMENTS The primary object of the present invention is to provide a razor handle and a razor that can be easily assembled from a single sheet and that has a swivel mechanism that enables the blade and cartridge to conform to curved surfaces. [Means for solving the problem]

[0010] The first means for solving the above problem is: A handle for a razor, comprising: Assembled from a single sheet of material, A handle portion to be held by a user; a head portion to which the cartridge is attached; The head section is a mounting portion having a mounting surface for mounting a blade or a cartridge containing a blade, the mounting portion being connected to a tip side of the handle portion via a first fold line and being pivotable about the first fold line; A back plate portion is connected to the mounting portion via a second fold line arranged parallel to the first fold line, and is folded back at the second fold line and positioned closer to the rear end of the handle portion than the mounting portion. The handle has a tongue portion that is cut and raised from the handle with the attachment portion at the tip, and this cut and raised portion generates leaf spring elasticity. The back plate portion folded back at the second fold line is inserted between the cut and raised tongue portion and the handle portion, The tongue portion presses the back plate portion and generates an elastic bias against the pushing of the tongue portion of the back plate portion toward the base end side as the mounting portion swings. A handle for a razor, characterized in that

[0011] The second method is The tongue portion holds the back plate portion between the handle portion, In the razor handle according to the first aspect, a sliding piece that comes into contact with the handle portion is provided at the tip of the back plate portion, and the sliding piece slides on the handle portion in response to the movement of the mounting portion.

[0012] The third method is The back plate is A tip portion surrounded by a convex slit toward the second fold line and a pair of third fold lines connected to the ends of the slit and parallel to the second fold line is folded back at the third fold lines, The portion surrounded by the convex slit has a receiving portion formed by inverting the portion, and the tongue portion is placed on the receiving portion and pressed against it. A handle for a razor according to the first aspect of the present invention.

[0013] The fourth measure is In the razor handle according to any one of the first to third aspects, the sheet material is paper made from pulp fibers, and the paper is a multi-layer paper in which a plurality of paper layers are laminated.

[0014] The fifth measure is: The mounting surface of the razor handle according to the first to fourth means is The razor has a blade or a cartridge containing the blade attached with the cutting edge facing the first fold line. Effect of the Invention

[0015] According to the present invention, there is provided a razor handle and a razor which can be easily assembled from a single sheet and which have a swing mechanism that enables the blade and cartridge to conform to curved surfaces. [Brief description of the drawings]

[0016] [Figure 1] FIG. 2 is a rear perspective view of the razor handle of the first embodiment. [Diagram 2] FIG. 2 is an exploded view of the razor handle of the first embodiment. [Diagram 3] FIG. 2 is a rear view of the razor handle of the first embodiment. [Figure 4] FIG. 2 is a side view of the razor handle of the first embodiment. [Diagram 5] FIG. 2 is a front perspective view of the razor handle of the first embodiment. [Figure 6] FIG. 2 is a front view of the razor handle of the first embodiment. [Figure 7] FIG. 11 is a rear perspective view of a razor handle of a second embodiment. [Figure 8] FIG. 11 is an exploded view of a razor handle according to a second embodiment. [Figure 9] FIG. 11 is a rear view of the razor handle of the second embodiment. [Figure 10] FIG. 11 is a side view of a razor handle according to a second embodiment. [Figure 11] FIG. 11 is a front perspective view of a razor handle according to a second embodiment. [Figure 12] FIG. 11 is a front view of a razor handle according to a second embodiment. [Figure 13] FIG. 2 is a diagram showing a cross section of the multi-layer paper of the present embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Next, an embodiment of the present invention will be described in detail below with reference to Figs. 1 to 13. However, the present invention is not limited to the illustrated shape or this embodiment. Within the scope of the present invention, the detailed shape and position of each part can be changed within a range that does not impede the effect of the present invention. In addition, the terms "front", "back", "top", "bottom", "left" and "right" in the present invention and this specification change depending on the position of the viewer and are not terms that indicate absolute positions. In the hanger of this embodiment, the "front" and "back" do not necessarily have to coincide with the front and back when in use. In addition, the terms "first", "second", etc. do not necessarily indicate the order of operation.

[0018] First embodiment A razor handle according to a first embodiment will be described with reference to Figures 1 to 6. As shown particularly in Figure 1, this handle 1 has a handle portion 10 that is held by a user, and a head portion 30 to which a cartridge is attached, and is assembled from a single sheet material, as shown in the development view particularly in Figure 2.

[0019] The head portion 30 of this razor handle body 1 has an attachment portion 31 connected to the tip side of the handle portion 10 via a first fold line 41, and a back plate portion 32 connected to the attachment portion 31 via a second fold line 42 arranged parallel to the first fold line 41.

[0020] The handle portion 10 has an elongated rear end and a fan shape that gradually widens towards the tip end, with a first fold line 41 located at the edge thereof and connected to the attachment portion 31.

[0021] The attachment portion 31 is formed to rise from the handle portion 10 by bending the first fold line 41, and is connected to be swingable around the first fold line 41. In other words, the attachment portion 31 and the handle portion 10 are connected so that the angle between them can be changed. The attachment portion 31 also has an attachment surface 31A for attaching a blade or a cartridge containing the blade, and this attachment surface is formed on the surface opposite to the rear end direction of the handle portion. Therefore, when the blade or cartridge is attached to the attachment surface, when the attachment portion 31 swings around the first fold line 41, the blade or cartridge also moves accordingly.

[0022] Here, the razor handle 1 according to the present invention has a tongue portion 50 which is cut and raised from the handle portion 10 with the attachment portion 31 side as the tip, and which generates leaf spring elasticity by this cutting and raising. The leaf spring elasticity of the tongue portion 50 is adjusted mainly by the elastic deformability such as the rigidity and stiffness of the sheet material, as well as the width and length of the tongue portion 50 and the overall shape of the handle portion 10.

[0023] Meanwhile, the back plate portion 32 is folded back at the second fold line 42 and positioned closer to the rear end side of the handle portion 10 than the attachment portion 31, and in particular, the back plate portion 32 is inserted between the cut and raised tongue portion 50 and the handle portion 10, and the back plate portion 32 is configured to be pressed by the tongue portion 50. In the illustrated form, the tongue portion 50 not only presses the back plate portion 32, but is configured to sandwich the back plate portion 32 with the handle portion 10. At this time, if the force of the tongue portion 50 to return to the position before it was cut and raised is strong, an elastic biasing force is applied to the back plate portion 32, and it is sandwiched more firmly.

[0024] In the handle body 1 of this embodiment, the attachment portion 31 is structurally capable of swinging around the first fold line 41 as an axis, and the second fold line 42 is located parallel to the first fold line 41. Therefore, when the attachment portion 31 moves toward the rear end direction of the handle portion 10 around the first fold line 41 as an axis, the second fold line 42 moves closer to the rear end side of the handle portion 10. As a result, the back plate portion 32 is inserted further toward the base end portion 51 side of the tongue portion 50. Furthermore, when the attachment portion 31 moves toward the rear end direction of the handle portion 10 around the first fold line 41 as an axis, the attachment portion 31 becomes more erect relative to the handle portion 10. As a result, not only is the back plate portion 32 inserted toward the base end portion 51 side of the tongue portion 50, but the back plate portion 32 also tries to push up the tongue portion 50. In other words, the tongue portion 50 is cut up more, so that it pushes back the back plate portion 32. Bullet In this manner, in this embodiment, an elastic bias is generated in response to the pushing of the tongue piece portion 50 of the back plate portion 32 toward the base end portion 51 as the mounting portion 31 swings.

[0025] In this embodiment, as a preferred form, a handle portion folding line 11 is provided from the rear end side to the tip end side in the widthwise center of the side opposite to the cut-and-raised direction of the tongue portion 50 of the handle portion 10, and the handle portion 10 is folded in the widthwise direction, that is, in a direction perpendicular to the cut-and-raised direction of the tongue portion 50, so that the cut-and-raised side becomes the valley side, forming a three-dimensional handle portion 10. When the handle portion 10 is V-shaped in this manner, it has a superior design compared to a flat handle portion, and operability is improved in each step.

[0026] Furthermore, the bending of the handle portion 10 favorably utilizes the function and cutting of the tongue portion 50. That is, when the handle portion 10 is bent into a V-shape, the base end portion 51 of the tongue portion 50 is narrowed. As a result, the tip side of the tongue portion 50 is lifted from the handle portion 10. At this time, it is desirable to bend it as in the above-mentioned handle portion 10, since it is lifted toward the valley side. Furthermore, if the handle portion folding line 11 reaches the base end portion 51 of the tongue portion 50 as in the illustrated form, the base end portion 51 of the tongue portion 50 is also bent so as to be slightly curved, so that the base end portion 51 is less likely to break due to plastic deformation that would cause it to no longer function as a spring, and is more likely to generate an elastic biasing force.

[0027] Furthermore, in particular, in the handle body 1 of this embodiment, a sliding piece 33 that contacts the handle portion 10 is provided at the tip of the back plate portion 32, and is configured so that the sliding piece 33 slides on the handle portion 10 in response to the movement of the attachment portion 31. The sliding pieces 33 are provided in pairs so as to contact both end positions that remain when the tongue portion 50 is cut and raised, that is, positions that sandwich the tongue portion 50, thereby allowing stable movement of the back plate portion 32 and adjusting the friction between the back plate portion 32 and the handle portion 10, making it easy to adjust the tongue portion 50 to the back plate portion 32 to a desired elastic biasing force.

[0028] The size of the handle in this embodiment can be the same as that of a typical razor, but is not limited to this, and it is preferable that the overall length L1 in the unfolded state is 120 to 138 mm, the overall length after assembly is 80 to 100 mm, the width L2 of the head is 35 to 49 mm, and the width L3 of the handle is 15 to 20 mm. These sizes are the same as those of a typical razor, and a strong razor handle can be constructed from the sheet material.

[0029] Second Embodiment Next, a second embodiment will be described with reference to Figures 7 to 12. The same configuration as the first embodiment is as described above, and only the differences will be described. The second embodiment differs in the back plate structure and the resulting elastic biasing force of the tongue plate piece on the back plate.

[0030] In the handle body 1 of the second embodiment, as shown in Fig. 7, Fig. 8 and Fig. 10, the back plate portion 32 has a convex slit toward the second fold line 42, and a tip portion 32E connected to the end of the slit 32S and surrounded by a pair of third fold lines 43 parallel to the second fold line 42 and the tip edge. The tip portion is folded back at the third fold line 43 in a direction toward the handle portion side, and is folded over on the portion between the second fold line 42 and the third fold line 43. This folding back inverts the portion surrounded by the convex slit 32S, and a dish-shaped depression is formed on the folded edge of the back plate portion 32. In the illustrated shape, the shape of the slit is a curved semi-ellipse, but the specific shape of the slit is not limited.

[0031] The convex slit 32S is formed in the extension direction of the tip of the tongue portion 50, and the depression is formed at the position where the tongue portion 50 is placed. In this second embodiment, the dish-shaped depression of the back plate portion 32 is inserted between the tongue portion 50 and the handle portion 10. In other words, this depression serves as the receiving portion 34 that receives the tongue portion 50. In the second embodiment, the tongue portion 50 presses the back plate portion 32 while being placed on the receiving portion 34. Furthermore, since the receiving portion 34 has a wall of the thickness of the back plate portion 32 formed on the second fold line 42 side, the movement of the back plate portion 32 is restricted at the position where the tip of the tongue portion 50 placed on the receiving portion 34 abuts against the wall portion 35. Therefore, the mounting portion 31 is prevented from excessively falling toward the rear end side of the handle portion 10.

[0032] (Common configuration of each embodiment) In the handle body 1 of each of the above embodiments, the mounting portion 31 is configured to be able to swing around the first fold line 41 as an axis, and when the second fold line 42 side is pushed toward the handle portion 10, the back plate portion 32 is elastically biased by the tongue portion 50 to generate a repulsive force, so that the mounting surface 31A moves with elastic bias against the object, and has a so-called oscillating mechanism. Therefore, when a blade or a cartridge containing a blade is attached to the mounting surface of the handle body with the blade tip facing the first fold line, it becomes a razor with an oscillating mechanism. Note that the method of attaching the blade or cartridge to the mounting surface of the handle body of the present invention is not limited. The razor can be made by fixing it with an appropriate fixing means such as adhesive, adhesive tape, rivets, or grommets. The blade or cartridge is also not limited. A commercially available replacement blade cartridge may be used, or it may be formed by fixing the blade to a paper frame.

[0033] Here, the folding lines in the handle body of this embodiment are lines for easily folding back or folding the sheet material, and may be simply printed lines for positioning, but are preferably lines also called fold lines, perforations, or half slits, and in particular, half slits are preferable for adjusting the elastic force of the tongue portion, smooth swinging of the mounting portion, smooth movement of the back plate portion, ease of folding back, etc. However, it is not necessary for all lines to be the same type. They can be appropriately arranged in consideration of the required strength and the stress required for bending. In addition, the cut-tie ratio in the case of perforations and the slit depth in the case of half slits do not need to be the same.

[0034] Here, a particularly suitable sheet material for the handle body 1 of this embodiment will be described. As described above, the sheet material of this embodiment is preferably paper made of pulp fibers from the viewpoint of eliminating plastics. Specifically, examples include corrugated cardboard, coated cardboard, and multi-layer paper in which multiple paper layers are laminated. Of course, it is more preferable that the paper is made of only fibers derived from natural materials and does not contain synthetic fibers including plastics. Preferably, the paper is made of only pulp fibers. Furthermore, a particularly preferable paper is a multi-layer paper having three or more paper layers. As shown in FIG. 14, the multi-layer paper 90 has multiple paper layers 91, 92 laminated therein, so that the characteristics of each layer can be changed, and the paper can be easily folded while maintaining strength. For example, by combining a pair of surface layers 91, which are excellent in water resistance and abrasion resistance but are hard but tend to break easily, with a flexible middle layer 92, the paper can be made excellent in toughness and durability, and can be easily folded and assembled while maintaining strength. In addition, when each folding line is made into a half slit, the multiple layers including the surface layers can be prevented from being completely cut, and the risk of breakage at each folding line is significantly reduced and flexibility can be provided. The multi-layer paper 90 can be manufactured by multi-layer papermaking. The multi-layer paper 90 may be commercially available, for example, Eripla Paper manufactured by Dainichi Paper Co., Ltd. From this point of view, it is particularly preferable that the handle body of this embodiment is made of multi-layer paper and the folding lines are half slits.

[0035] When the sheet material is paper, the basis weight of the paper is preferably 700 g / m 2 More preferably, 750 g / m 2 More preferably, 800 g / m 2 That is all. Paper with this basis weight is easy to assemble by folding each part, and also easy to provide sufficient rigidity and strength. There is no upper limit to the basis weight, but there is a risk that creases may easily occur when using a calendar roll during papermaking. From this point of view, the upper limit is set at 1400 g / m 2 is preferred, and 1240 g / m 2is more preferable. When the sheet material is paper, the thickness is preferably 900 μm or more and 1,400 μm or less, more preferably 950 μm or more and 1,350 μm or less. The basis weight is a value measured in accordance with "Paper and paperboard - Basis weight measurement method" described in JIS P 8124 (2011), and the paper thickness is a value measured in accordance with "Paper and paperboard - Thickness and density test method" described in JIS-P8118 (2014).

[0036] When the sheet material is paper, the "bending strength" of the paper based on JIS K 7171 is preferably 39 to 45 MPa. Particularly preferably, it is 40 to 42.5 MPa. Within this range, the elastic force of the tongue and back plate can be suitably exerted, the mounting surface can easily follow the curved surface of the skin, and excessive surface pressure can be avoided. Furthermore, the "bending modulus" based on JIS K 7171 is preferably 6500 MPa to 7500 Pa. Within this range, the elastic force of the tongue and back plate can be suitably exerted, the mounting surface can easily follow the curved surface of the skin, and excessive surface pressure can be avoided. The "bending strength" and "bending modulus" are measured at a test speed of 2 mm / min and a support distance of 64 m, and the measured values ​​are the average values ​​of five measurements.

[0037] When the sheet material is paper, the constituent pulp fiber of the paper is not necessarily limited, but the preferred constituent pulp fiber is softwood kraft pulp such as softwood unbleached kraft pulp (NUKP), softwood semi-bleached kraft pulp (NSBKP), softwood bleached kraft pulp (NBKP), and hardwood kraft pulp such as hardwood unbleached kraft pulp (LUKP), hardwood semi-bleached kraft pulp (LSBKP), hardwood bleached kraft pulp (LBKP). As other pulps, chemical pulps such as waste paper pulp, hardwood sulfite pulp, softwood sulfite pulp, or pulps chemically or mechanically produced from non-wood fibers such as kenaf, hemp, and reed may be used in appropriate combination. Since it is easy to develop strength, it is preferable that softwood kraft pulp and hardwood kraft pulp are 90 to 100 mass%. In this case, the blend ratio of softwood kraft pulp and hardwood kraft pulp is preferably 5:95 to 30:70. 。 To make a razor with a design that gives a clean and hard feel, it is particularly preferable to use bleached softwood kraft pulp and bleached hardwood kraft pulp, which are white pulps with high whiteness.

[0038] If the sheet material is paper, it is desirable that the paper has a longitudinal tensile strength of 70 kN / m or more and a transverse tensile strength of 40 kN / m or more, measured in accordance with JIS P 8113 (2006). If the paper has these tensile strengths, it is suitable for folding and assembly.

[0039] In addition, when the sheet material is paper, it is desirable that the Taber stiffness of the paper, measured in accordance with JIS P 8125 (2000), is 150 mN·m or more in the longitudinal direction and 70 mN·m or more in the transverse direction. in If so, it's easy to fold and assemble.

[0040] Furthermore, when the sheet material is paper, the paper has a Z-axis strength of 400 kN / m, measured in accordance with JAPAN TAPPI Paper and Pulp Test Method No. 18-1:2000. 2 More than 450kN / m 2The handle body in the expanded state can be easily manufactured by punching such as by Thompson processing or by cutting with a cutting plotter or the like.

[0041] When the sheet material is paper, the static friction coefficient of the paper according to JIS P 8147 ISO horizontal method is preferably 0.25 to 0.65. In particular, the friction between the tongue and back plate is smooth. This measurement method requires three measurements of the back surfaces of the sheet material against each other and three measurements of the front surfaces against each other, and it is preferable that the third measurements of the back surfaces against each other and the front surfaces against each other are all within the above range. The ISO horizontal method requires only measuring at least one of the static friction coefficient of the first slide, the static friction coefficient of the third slide, or the kinetic friction coefficient of the third slide, and the static friction coefficient of the third slide tends to be smaller than the static friction coefficient of the first slide, and the variation in the static friction coefficient of the third slide is smaller.

[0042] When the sheet material is paper, the paper is preferably PPS (Parker Print Surf Roughness) conforming to JIS P 8151, and has a thickness of preferably 3 to 8 μm, more preferably 4 to 7 μm on both the front and back sides. This allows smooth rubbing between the tongue and back plate.

[0043] When the sheet material is paper, the MMD value of the paper is preferably 10 to 25 on both the front and back sides. This allows smooth rubbing between the tongue and back plate. The MMD is measured using a friction tester (KES-SE, manufactured by Kato Tech Co., Ltd.) or an equivalent device. The friction element is made of 20 standard piano wires with a diameter of 0.5 mm arranged side by side, and has a contact surface of 10 mm in both length and width.

[0044] When the sheet material is the multilayer paper 90 which is particularly preferred for the handle body 1 according to this embodiment, the number of layers is not limited, but is preferably five to nine layers, and the number of middle layers 92 is preferably three or more, especially five layers. In particular, the form shown in FIG. 14 has three middle layers 92. It is said that when the total number of middle layers 92 is three or more, the multilayer paper 90 is more likely to exhibit its toughness and durability. From the viewpoint of maintaining interlayer strength, the upper limit of the total number of middle layers 92 is preferably seven or less. In addition, three to seven layers make it easier to operate while maintaining interlayer strength when using a cylinder net multi-cylinder type combined papermaking machine.

[0045] When the sheet material is a multi-layer paper 90, the basis weights of the surface layer 91 and the middle layer 92 can be adjusted within the range of the overall basis weight when the sheet material is paper, and are not particularly limited. Preferably, the basis weight of the surface layer 91 is 60.0 g / m per layer. 2 More than 150.0g / m 2 Below 100~145g / m 2 The basis weight of the entire middle layer 92 is preferably 490 g / m 2 More than 750g / m 2 Below 600g / m 2 More than 740g / m 2 The following is preferable. Furthermore, it is preferable that the ratio of the total basis weight of the pair of surface layers 91, 91 to the basis weight of the entire multilayer paper 90 is 15.0% or more and 33.0% or less. The pair of surface layers 91 have high rigidity, and the middle layer 92 has excellent flexibility. This makes it easy to fold at the fold lines and difficult to fold at positions other than the fold lines, making it easy to produce a handle body that is strong and easy to assemble.

[0046] When the sheet material is multilayer paper 90, the blend of pulp fibers in each layer of the multilayer paper 90 is preferably such that the surface layer 91 has a mass ratio (%) of softwood kraft pulp to the hardwood kraft pulp of 0 / 100 or more and 15 / 85 or less. In addition to the surface layer 91 having this blend, the middle layer 92 preferably has a mass ratio (%) of softwood kraft pulp to the hardwood kraft pulp of 15 / 85 or more and 35 / 65 or less. The surface layer contains a large amount of hardwood kraft pulp, which is rigid and easily densified, giving the surface layer high density and rigid characteristics, while the middle layer contains a large amount of softwood kraft pulp, which is more flexible than the surface layer, and therefore the handle body is likely to have strength that is not easily reduced even when folded at each fold line or repeatedly folded during assembly.

[0047] Furthermore, when the sheet material is multi-layered paper 90, it is desirable that at least one of a sizing agent and a paper strength agent is added to the multi-layered paper 90 as a papermaking additive. This makes it easier to adjust the strength to the desired level. The multi-layered paper 90 may contain various other additives within a range that does not impair the intended effect of the present invention. For example, polyvinyl alcohol, wax, etc. may be applied.

[0048] Examples of sizing agents include styrene-based sizing agents, alkyl ketene dimers (AKD), alkenyl succinic anhydride (ASA), neutral rosin sizing agents, rosin sizing agents, modified rosin emulsion sizing agents, etc. Among these, rosin sizing agents and modified rosin emulsion sizing agents are preferred. The rosin sizing agent is not particularly limited. Examples of rosin-based substances include reinforced rosins obtained by modifying rosins such as gum rosin, wood rosin, and tall oil rosin with α,β-unsaturated carboxylic acids or their anhydrides such as fumaric acid, maleic acid, and acrylic acid, and rosin esters obtained by reacting rosins with polyhydric alcohols such as glycerin, trimethylolethane, trimethylolpropane, pentaerythritol, and diglycerin. In addition, the rosin sizing agents include those obtained by emulsifying these alone or a mixture thereof, and those obtained by emulsifying these alone and then mixing them. In addition, those obtained by adding various polymers to the emulsions in order to further improve the size expression are also included.

[0049] As the paper strength enhancer, various known ones such as polyacrylamide resin, polyamide resin, polyamine resin, acrylic resin, melamine resin, urea resin, polyamide epichlorohydrin resin, etc. can be used. Among these, it is preferable to use an amphoteric paper strength enhancer. Examples of amphoteric polyacrylamides include copolymers of acrylamide with anionic monomers and cationic monomers, Mannich modified copolymers of acrylamide with anionic monomers, and Hoffman decomposition products. In particular, amphoteric polyacrylamides have a self-fixing function, so that even if they are added in an increased amount to improve the inter-paper strength, they do not become excessively cationic, and can be stably fixed by including them together with a modified rosin emulsion sizing agent.

[0050] The amount of sizing agent added is preferably 0.5 kg / t or more and 5.0 kg / t or less in terms of solids. The amount of paper strength agent added is preferably 12 kg / t or more and 30 kg / t or less in terms of solids. Note that "kg / t" indicates the mass (kg) per ton of pulp. If the amount of sizing agent added is within this range, water resistance will increase, making it easier to maintain sufficient strength even when wet clothes or towels are hung over it.

[0051] Furthermore, when the sheet material is multilayer paper 90, it is preferable to add at least one of the above-mentioned sizing agent and paper strength agent as a papermaking additive to each of the surface layer 91 and the middle layer 92 of the multilayer paper 90. In this case, the amount of sizing agent added to the surface layer 91 is preferably 0.5 kg / t or more and 5.0 kg / t or less in solids. The amount of sizing agent added to the middle layer 92 is preferably 2.0 kg / t or more and 5.0 kg / t or less in solids. The amount of paper strength agent added to each layer is preferably 12 kg / t or more and 30 kg / t or less in solids. Within these ranges, it is easy to achieve various paper strengths, such as interlayer strength of the multilayer paper suitable for hangers.

[0052] Furthermore, the handle body according to this embodiment preferably contains a siloxane compound. When the siloxane compound is contained, the rigidity, strength, and water resistance are increased by the siloxane bond. The siloxane compound is not necessarily limited as long as it has a siloxane bond, but since the handle body 1 constitutes a razor that comes into contact with the human body, it is preferable that the siloxane compound is non-toxic or has low toxicity to living organisms. In addition, the siloxane compound may be applied to the hanger after assembly, or may be impregnated with an appropriate alkoxysilane solution or an alkoxysilane solution processed product before assembly or a sheet material as a raw material, and then heated or heated to contain the siloxane compound. In this way, the siloxane compound is preferably contained in the pulp fiber itself or in a manner that coats the pulp fiber.

[0053] Furthermore, the handle body according to this embodiment may be coated or impregnated with a surface protective agent, antibacterial agent, or antiviral agent as long as the friction coefficient, surface roughness, and folding suitability are not excessively changed and the function of the handle body and the effects of the present invention are not hindered. [Explanation of symbols]

[0054] 1...razor handle, 10...handle portion, 11...handle portion fold line, 30...head portion, 31...mounting portion, 31A...mounting surface, 32...back plate portion, 32E...tip portion of back plate portion, 32S...slit, 33...sliding piece, 34...receiving portion, 35...wall portion, 41...first fold line, 42...second fold line, 43...third fold line, 50...tongue portion, 51...base end portion of tongue portion.

Claims

1. A handle for a razor, comprising: Assembled from a single sheet of material, A handle portion to be held by a user; a head portion to which the cartridge is attached; The head section is a mounting portion having a mounting surface for mounting a blade or a cartridge containing a blade, the mounting portion being connected to a tip side of the handle portion via a first fold line and being pivotable about the first fold line; A back plate portion is connected to the mounting portion via a second fold line arranged parallel to the first fold line, and is folded back at the second fold line and positioned closer to the rear end of the handle portion than the mounting portion. The handle has a tongue portion that is cut and raised from the handle with the attachment portion at the tip, and this cut and raised portion generates leaf spring elasticity. The back plate portion folded back at the second fold line is inserted between the cut and raised tongue portion and the handle portion, The tongue portion presses the back plate portion and generates an elastic bias against the pushing of the tongue portion of the back plate portion toward the base end side as the mounting portion swings. A handle for a razor, characterized in that

2. The tongue portion holds the back plate portion between the handle portion, 2. A razor handle as claimed in claim 1, wherein a sliding piece is provided at a tip of the back plate portion which contacts the handle portion, and the sliding piece slides on the handle portion in response to the movement of the mounting portion.

3. The back plate is A tip portion surrounded by a convex slit toward the second fold line and a pair of third fold lines connected to the ends of the slit and parallel to the second fold line is folded back at the third fold lines, The portion surrounded by the convex slit has a receiving portion formed by inverting the portion, and the tongue portion is placed on the receiving portion and pressed against it.

2. A razor handle as claimed in claim 1.

4. 4. The razor handle according to claim 1, wherein the sheet material is paper made from pulp fibers, and the paper is a multi-layer paper in which a plurality of paper layers are laminated.

5. The attachment surface of the handle for the razor according to any one of claims 1 to 4, A razor characterized in that a blade or a cartridge containing a blade is attached with the cutting edge facing the first fold line.

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