Razor handle 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 is attached in a resin case, and a handle part for the user to grip and operate. T The handle is usually made of hard plastic or metal, and many of them have a structure that makes them difficult to fold or disassemble, which necessitates a large storage volume, making them difficult to store, and making them inconvenient to carry.

[0003] Additionally, 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 global movement toward a plastic-free society is underway for environmental reasons. In Japan, the "Act on Promotion of Resource Recycling Related to Plastics" was enacted, which requires certain businesses, such as hotels, to reduce the use of disposable plastic products. Furthermore, this "Act on Promotion of Resource Recycling Related to Plastics" designates plastic razors as "products containing specified plastics," and the move away from plastic in razors is drawing attention.

[0004] A razor with a paper handle that is formed by folding and assembling a thin sheet is proposed, for example, in Patent Document 1 listed below. This razor has a paper handle, so the overall amount of plastic used is small, and it can 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, and 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 plastic or metal handles have a mechanism, also known as a swivel head or swivel mechanism, in which the cartridge attached to the handle moves to follow the curves 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 Cited Document 1, the cartridge (razor head) is forced against the user's skin by the bending 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 to be gripped, and further ease of assembly is desired.

[0009] SUMMARY OF THE INVENTION It is therefore a primary object of the present invention to provide a razor handle and a razor that can be easily assembled from a single sheet and that have a swing mechanism that allows 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, Assembled from a single sheet of material, a handle portion to be gripped by a user; a head portion to which the cartridge is attached, The head part is a mounting portion having a mounting surface for mounting a blade or a cartridge containing the blade, the mounting portion being connected to the distal end side of the handle portion via a first fold line and being pivotable about the first fold line; a back plate portion connected to the attachment portion via a second fold line arranged parallel to the first fold line, folded back at the second fold line, and positioned closer to the rear end of the handle portion than the attachment portion; The handle has a tongue portion cut and raised from the handle with the attachment portion at the tip, and this cutting and raising produces leaf spring elasticity. The back panel folded back at the second fold line is inserted between the cut-up tongue and the handle, The tongue portion presses the back plate portion and generates an elastic biasing force against the back plate portion being pushed toward the base end side of the tongue portion as the mounting portion swings. A handle for a razor.

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

[0012] The third method is The back panel 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 rests on the receiving portion and presses it. A handle for a razor according to the first aspect.

[0013] The fourth method 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 multi-layered paper in which a plurality of paper layers are laminated.

[0014] The fifth method is The mounting surface of the razor handle according to the first to fourth means, A razor in which a blade or a cartridge containing the blade is attached with the cutting edge facing the first fold line. [Effects of the Invention]

[0015] According to the present invention, a razor handle and a razor are provided which can be easily assembled from a single sheet and have a swing mechanism that allows the blade and cartridge to follow curved surfaces. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 2 is a rear perspective view of the razor handle of the first embodiment. [Figure 2] FIG. 2 is a development view of the razor handle of the first embodiment. [Figure 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. [Figure 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. 10 is a rear perspective view of a razor handle according to a second embodiment. [Figure 8] FIG. 10 is a development view of a razor handle according to a second embodiment. [Figure 9] FIG. 10 is a rear view of the razor handle of the second embodiment. [Figure 10] FIG. 10 is a side view of a razor handle according to a second embodiment. [Figure 11] FIG. 10 is a front perspective view of a razor handle according to a second embodiment. [Figure 12] FIG. 10 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 multilayer paper of the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0017] Next, an embodiment of the present invention will be described in detail below with reference to Figures 1 to 13. However, the present invention is not limited to the illustrated shapes or this embodiment. Within the scope of the present invention, the detailed shape and position of each part can be changed to the extent that the effects of the present invention are not impaired. Furthermore, the terms "front," "back," "top," "bottom," "left," and "right" used in this invention and this specification change depending on the position of the viewer and do not indicate absolute positions. In the hanger of this embodiment, the "front" and "back" do not necessarily correspond to the front and back when in use. Furthermore, terms such as "first" and "second" 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 gripped 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 developed view particularly in Figure 2.

[0019] The head portion 30 of the handle body 1 for this razor 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-like 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 by bending along a linear first fold line 41 so as to rise from the handle portion 10, and is connected to be swingable about the first fold line 41. In other words, the angle between the attachment portion 31 and the handle portion 10 is connectable so that it can change. 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 the rear end of the handle portion. Therefore, when the blade or cartridge is attached to the attachment surface, when the attachment portion 31 swings about 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 that is cut and raised from the handle portion 10 with the attachment portion 31 at the tip, and this cutting and raising produces leaf spring elasticity. 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 by 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 of the handle portion 10 than the attachment portion 31. In particular, the back plate portion 32 is configured to be inserted between the cut-and-raised tongue portion 50 and the handle portion 10, and the back plate portion 32 is pressed by the tongue portion 50. In the illustrated form, the tongue portion 50 not only presses the back plate portion 32, but is also configured to sandwich the back plate portion 32 together with the handle portion 10. At this time, if the force of the tongue portion 50 trying to return to the position before being cut and raised is strong, an elastic biasing force is applied to the back plate portion 32, and the back plate portion 32 is more tightly sandwiched.

[0024] In the handle body 1 of this embodiment, the attachment portion 31 is structurally capable of swinging about the first fold line 41 as an axis, and the second fold line 42 is positioned parallel to the first fold line 41. Therefore, when the attachment portion 31 moves toward the rear end of the handle portion 10 about the first fold line 41 as an axis, the second fold line 42 moves closer to the rear end of the handle portion 10. As a result, the back plate portion 32 is inserted further toward the base end 51 of the tongue portion 50. Furthermore, when the attachment portion 31 moves toward the rear end of the handle portion 10 about 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 51 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 more raised, so it does not push 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 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 front end side in the widthwise center of the surface of the handle portion 10 opposite the cut-and-raised direction of the tongue portion 50, 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 way, it has a superior design compared to a flat handle portion, and operability is significantly improved.

[0026] Furthermore, the bending of the handle portion 10 optimizes 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 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, since the tip side of the tongue portion 50 is lifted toward the valley side, it is desirable to bend the handle portion 10 as described above. Furthermore, if the handle portion fold line 11 extends to the base end 51 of the tongue portion 50 as in the illustrated embodiment, the base end 51 of the tongue portion 50 is also bent so that it is slightly curved, making it less likely to undergo plastic deformation at the base end 51, which would cause it to lose its function as a spring, and 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 accordance with the movement of the attachment portion 31. The sliding pieces 33 are provided in pairs so as to contact the end positions that remain when the tongue portion 50 is cut and raised, that is, the positions that sandwich the tongue portion 50, thereby ensuring 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 desired elastic biasing force of the tongue portion 50 against the back plate portion 32.

[0028] The size of the handle in this embodiment can be the same as that of a typical razor and is not limited to this, but 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 dimensions are the same as those of a typical razor, and a strong razor handle can be constructed from 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 generation of an elastic biasing force from the tongue plate piece to the back plate.

[0030] 7, 8, and 10, the handle body 1 of this second embodiment has a back plate portion 32 having a convex slit extending 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 and overlapped on the portion between the second fold line 42 and the third fold line 43. This folding inverts the portion surrounded by the convex slit 32S, forming a dish-shaped depression on the folded edge of the back plate portion 32. Note that, in the illustrated shape, the shape of the slit is a curved semi-ellipse, but the specific shape of the slit is not limited thereto.

[0031] The convex slit 32S is formed in the extension direction of the tip of the tongue portion 50, and the recess is formed at the position where the tongue portion 50 rests. In this second embodiment, the dish-shaped recess of the back plate portion 32 is inserted between the tongue portion 50 and the handle portion 10. In other words, this recess serves as the receiving portion 34 that receives the tongue portion 50. In the second embodiment, the tongue portion 50 rests on the receiving portion 34, thereby pressing down on the back plate portion 32. Furthermore, since the receiving portion 34 has a wall formed on the second fold line 42 side that is equal to the thickness of the back plate portion 32, the movement of the back plate portion 32 is restricted at the position where the tip of the tongue portion 50 resting on the receiving portion 34 abuts against the wall portion 35. This prevents the attachment portion 31 from excessively tipping toward the rear end 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 pivotable about the first fold line 41. Furthermore, when the second fold line 42 side is pressed toward the handle portion 10, the back plate portion 32 is elastically biased by the tongue portion 50, generating a repulsive force, causing the mounting surface 31A to move elastically against the object, resulting in a so-called oscillating mechanism. Therefore, when a blade or a cartridge containing the blade is attached to the mounting surface of the handle body with the cutting edge facing the first fold line, the razor becomes one 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 formed by fixing the blade or cartridge using any suitable 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 a blade may be fixed to a paper frame.

[0033] Here, the folding lines in the handle body of this embodiment are lines that facilitate the folding and reversing of the sheet material. They may be simply printed lines for positioning, but are preferably creases, also known as fold lines, perforations, or half slits. Half slits are particularly desirable for adjusting the elastic force of the tongue portion, smooth swinging of the attachment portion, smooth movement of the back panel, ease of reversing, and the like. However, not all of the lines need to be the same type. They can be arranged appropriately, taking into account the required strength and stress required for bending. Furthermore, 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, we will further explain sheet materials particularly suitable for the handle body 1 of this embodiment. As mentioned above, from the perspective of eliminating plastics, the sheet material of this embodiment is preferably paper made from pulp fibers. Specific examples include corrugated cardboard, coated cardboard, and multilayer paper made of multiple laminated paper layers. Of course, paper made solely from natural fibers, without synthetic fibers including plastic, is even more desirable. Paper made solely from pulp fibers is preferable. Furthermore, multilayer paper having three or more layers is particularly preferable. As shown in FIG. 14 , multilayer paper 90 is made up of multiple laminated paper layers 91 and 92, allowing for different characteristics of each layer, making it easy to fold while maintaining strength. For example, by combining a pair of surface layers 91, which are excellent in water resistance and abrasion resistance but tend to be hard and break easily, with a flexible middle layer 92, the paper becomes strong and durable, allowing for easy folding and assembly while maintaining strength. Furthermore, when each fold line is half-slit, multiple layers, including the surface layers, are prevented from being completely cut, significantly reducing the risk of breakage at each fold line and allowing for flexibility. The multilayer paper 90 can be manufactured by multilayer papermaking. The multilayer paper 90 may be commercially available, for example, Elipla 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 multilayer paper with half slits on the fold lines.

[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's 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 or the like 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 paper thickness is preferably 900 μm or more and 1,400 μm or less, and 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 "flexural strength" of the paper, as defined in JIS K 7171, is preferably 39 to 45 MPa. A value of 40 to 42.5 MPa is particularly desirable. This range allows the tongue and back plate portions to exert an elastic force optimally, allowing the attachment surface to easily conform to the curved surface of the skin without excessive surface pressure. Furthermore, the "flexural modulus" as defined in JIS K 7171 is preferably 6500 MPa to 7500 Pa. This range allows the tongue and back plate portions to exert an elastic force optimally, allowing the attachment surface to easily conform to the curved surface of the skin without excessive surface pressure. The "flexural strength" and "flexural modulus" were measured at a test speed of 2 mm / min with a support distance of 64 m, and the measured values ​​were averaged over five measurements.

[0037] When the sheet material is paper, the constituent pulp fibers of the paper are not necessarily limited. However, preferred constituent pulp fibers are softwood kraft pulps such as softwood unbleached kraft pulp (NUKP), softwood semi-bleached kraft pulp (NSBKP), and softwood bleached kraft pulp (NBKP), and hardwood kraft pulps such as hardwood unbleached kraft pulp (LUKP), hardwood semi-bleached kraft pulp (LSBKP), and hardwood bleached kraft pulp (LBKP). Other pulps may be used in combination with various known pulps, such as recycled paper pulp, hardwood sulfite pulp, and softwood sulfite pulp, or pulps produced chemically or mechanically from non-wood fibers such as kenaf, hemp, and reed. It is desirable for the softwood kraft pulp and hardwood kraft pulp to account for 90 to 100% by mass, as this facilitates the development of strength. In this case, the blending ratio of softwood kraft pulp and hardwood kraft pulp is preferably 5:95 to 30:70. 。 To obtain a razor with a clean, hard design, it is particularly preferable to use bleached softwood kraft pulp or bleached hardwood kraft pulp, which are white pulps with high whiteness.

[0038] When the sheet material is paper, it is desirable that the paper have 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). Paper with these tensile strengths is suitable for folding and assembly.

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

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

[0041] When the sheet material is paper, it is desirable that the static friction coefficient of the paper, as measured by the JIS P 8147 ISO horizontal method, be between 0.25 and 0.65. This ensures smooth rubbing between the tongue and back plate. 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 desirable 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 measuring at least one of the static friction coefficient of the first sliding, the static friction coefficient of the third sliding, or the kinetic friction coefficient of the third sliding. The static friction coefficient of the third sliding tends to be smaller than the static friction coefficient of the first sliding, and the static friction coefficient of the third sliding tends to have less variation.

[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, which allows smooth rubbing between the tongue portion and the back plate portion.

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

[0044] When the sheet material is a 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, with three or more middle layers 92, especially five. In particular, the form shown in FIG. 14 has three middle layers 92. It is believed that when the total number of middle layers 92 is three or more, the multilayer paper 90 is more likely to exhibit strength 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. Furthermore, three to seven layers facilitate operation while maintaining interlayer strength when using a cylinder-type multi-cylinder papermaking machine.

[0045] When the sheet material is multi-layer paper 90, the basis weight 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 is 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 combined 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 line positions and difficult to fold at positions other than the fold lines, resulting in a handle body that is strong and easy to assemble.

[0046] When the sheet material is multilayer paper 90, the pulp fiber blend of each layer in the multilayer paper 90 is preferably such that the mass ratio (%) of softwood kraft pulp to the hardwood kraft pulp in the surface layer 91 is between 0 / 100 and 15 / 85. In addition to the surface layer 91 having this blend, the mass ratio (%) of softwood kraft pulp to the hardwood kraft pulp in the middle layer 92 is preferably between 15 / 85 and 35 / 65. 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 properties, while the middle layer contains a large amount of softwood kraft pulp, which is more flexible than the surface layer. This makes it possible to produce a handle that is resistant to loss of strength even when folded at each fold line or repeatedly folded during assembly.

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

[0048] Examples of sizing agents include styrene-based sizing agents, alkyl ketene dimer (AKD), alkenyl succinic anhydride (ASA), neutral rosin sizing agents, rosin sizing agents, and modified rosin emulsion sizing agents. 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 fortified 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. Rosin sizing agents also include emulsions of these substances alone or a mixture thereof, as well as emulsions of these substances emulsified alone and then mixed together. Furthermore, emulsions to which various polymers have been added to further improve sizing properties are also included.

[0049] Various known paper strength agents can be used, such as polyacrylamide resins, polyamide resins, polyamine resins, acrylic resins, melamine resins, urea resins, and polyamide-epichlorohydrin resins. Among these, it is preferable to use amphoteric paper strength agents. Examples of amphoteric polyacrylamides include copolymers of acrylamide with anionic monomers and cationic monomers, Mannich-modified copolymers of acrylamide with anionic monomers, and Hoffman degradation products. Amphoteric polyacrylamides, in particular, have a self-fixing function, so even if they are added in excess to improve inter-paper strength, they do not result in an excess of cations. Therefore, when used together with a modified rosin emulsion sizing agent, they can stably fix the 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 terms of 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 terms of 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 terms of solids. This range makes it 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. The inclusion of a siloxane compound increases stiffness, strength, and water resistance through siloxane bonds. While the siloxane compound is not necessarily limited as long as it contains a siloxane bond, since the handle body 1 constitutes a razor that comes into contact with the human body, it is desirable that the siloxane compound be non-toxic or low-toxic to living organisms. The siloxane compound may be applied to the assembled hanger, or may be impregnated into sheet material before assembly or sheet material as a raw material by impregnating the sheet material with an appropriate alkoxysilane solution or a processed alkoxysilane solution, followed by heating or heating. This is desirable because the siloxane compound is incorporated in the pulp fibers by bonding to them or coating them.

[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 this does not excessively change the coefficient of friction, surface roughness, or folding suitability, and does not impair the function of the handle body or the effects of the present invention. [Explanation of symbols]

[0054] 1...razor handle body, 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, Assembled from a single sheet of material, a handle portion to be gripped by a user; a head portion to which the cartridge is attached, The head part is a mounting portion having a mounting surface for mounting a blade or a cartridge containing the blade, the mounting portion being connected to the distal end side of the handle portion via a first fold line and being pivotable about the first fold line; a back plate portion connected to the attachment portion via a second fold line arranged parallel to the first fold line, folded back at the second fold line, and positioned closer to the rear end of the handle portion than the attachment portion; The handle has a tongue portion cut and raised from the handle with the attachment portion at the tip, and this cutting and raising produces leaf spring elasticity. The back panel folded back at the second fold line is inserted between the cut-up tongue and the handle, The tongue portion presses the back plate portion and generates an elastic biasing force against the back plate portion being pushed toward the base end side of the tongue portion as the mounting portion swings. A handle for a razor, characterized in that

2. The tongue portion clamps the back plate portion with the handle portion, 2. A razor handle according to claim 1, wherein a sliding piece is provided at the tip of the back plate portion in contact with the handle portion, and the sliding piece slides on the handle portion in response to movement of the mounting portion.

3. The back panel 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 rests on the receiving portion and presses it.

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

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