JP2011182888A - Permanent wave rod - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a permanent wave rod that allows the hair to be easily curled, allows an agent to uniformly permeate the hair and to reliably and easily be washed away, and reduces the time for treatment, resulting in manageable good-looking permanent wave hair with bounce while minimizing damage to the hair. <P>SOLUTION: The permanent wave rod includes a cylindrical and synthetic-resin rod body, and a pair of substantially-short cylindrical ring rubber retainers expanded at both ends of the rod body and having a plurality of cutouts outside. The rod body is formed in a mesh. A ratio (L/R) of the length (L) to the outer diameter (R) of the rod body is ≥1.5 and ≤2.5. The length (L) of the rod body is preferably 30 to 70 mm. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a permanent wave rod, and more particularly to a permanent wave rod of a type in which hair is wound around a rod and fastened with a rubber band.

  Today, permanent waves are popular in order to satisfy the arrangement, taste, and fashion of hairstyles. This permanent wave causes chemical reaction in the hair, changes the structure of the hair to form a wave in the hair, and keeps this wave for a certain period of time, and is used for beauty and curly hair correction etc. Has been. For this reason, there is a demand for a permanent wave technique that can give a sufficient wave to the hair, while maintaining the wave for a long period of time, and minimizing damage to the hair.

  In particular, the design style of hairstyles is increasing today, and there is a demand for a technique for imparting an arbitrary wave shape partially to the upper part of the head, both sides, etc., and a technique for improving the fundamental rise.

As a general treatment method of such permanent wave,
(1) The process of apply | coating 1 agent containing an alkaline agent and a reducing agent to hair,
(2) Winding process of winding hair around a rod,
(3) A process of fixing the rod to the hair by covering the rod ends with rubber bands,
(4) Intermediate water washing process to wash away the excess 1 agent,
(5) A step of applying two agents containing an oxidizing agent to the hair,
(6) The step of removing the rod, and (7) The hair is sufficiently rinsed with slightly warm water, rinsed, and then set. In addition, the process of apply | coating 1 agent may be performed after a winding process.

  The permanent mechanism in the permanent wave treatment method will be described. First, the alkaline agent contained in one agent penetrates into the hair to swell the hair, and the penetration of the reducing agent contained in one agent into the hair is promoted. The The hair is composed of keratin protein or the like, and the reducing agent that has penetrated into the hair reduces and cleaves cystine bonds or the like that are linked between the polypeptide chains forming the keratin protein. At this time, since distortion stress due to winding is generated inside the hair, each peptide chain flows individually so as to eliminate this distortion stress, and relative positional deviation from other polypeptide chains. Produce. Next, by causing the oxidizing agent contained in the two agents to act on the hair in this state, a cystine bond is formed again between cysteine residues different from the original, and as a result, a wave is fixedly formed on the hair. That is, the permanent method is to give a wave to hair through a reducing action by one agent and an oxidizing action by two agents.

  As a permanent wave rod used in the permanent wave treatment, a cylindrical rod body and a pair of flat cylindrical rubber bands extending at both ends of the rod body and having a plurality of notches on the outside are conventionally used. What is generally provided with a locking portion, (1) a permanent wave rod having a large width and diameter so that the treatment can be completed in a short time (see Japanese Patent Application Laid-Open No. 2004-337286), (2) A permanent wave rod (see Japanese Patent Application No. 2005-9441) in which a plurality of slits are formed in the rod body in the longitudinal direction and at substantially equal angular intervals so as to achieve the permeability and uniformity of the application of the two agents. Has been developed.

  However, in the conventional permanent wave rods (1) and (2), the rod body for winding the hair is made of synthetic resin such as polycarbonate (PC), polypropylene (PP), etc. Since the ratio of the portion (slit) is small, the rigidity is high, and it does not have elasticity to the stress that acts when the hair is wound. For this reason, the work of winding the hair around the permanent wave rod is not easy, and this is a factor that reduces the workability of the permanent and the beauty of the finish. In particular, it is difficult to wind the hair into the permanent wave rod, and as a result, the finish such as ridge feeling (rising from the root of the hair, elasticity) and a feeling of tightness to the tip of the hair are improved. It is difficult to perform such treatment.

  In addition, the permanent wave rods of (1) and (2) above have a small proportion of the opening portion (slit) of the rod body, and there are relatively many band-like regions other than the slits in the rod body. The penetration efficiency of the agent into the hair and the ease of washing one agent in the intermediate water washing step are not so high. Such low penetration efficiency of the first agent and the second agent into the hair may reduce the wave forming ability of the hair. In addition, the ease of cleaning of one agent in the intermediate water washing process is that one agent remains between the band-like region of the rod body and the hair, and the beauty of the permanent finish (specifically, the bundling up to the tip of the hair) (Ridge feeling) is reduced.

  Further, in the permanent wave rod represented by the above (1) and (2), the length (L) of the rod body is usually 80 mm or more, and the ratio of the length (L) to the outer diameter (R) ( L / R) exceeds 2. According to the permanent wave rod having such a length (L) and ratio (L / R) in this range, it is difficult to precisely arrange the rods without colliding with each other. It is difficult to impart a wave shape, and as a result, it is not possible to meet today's demands for improving the design of the permanent wave as described above.

JP 2004-337286 A Japanese Patent Application No. 2005-9441

  The present invention has been made in view of these inconveniences, and is excellent in the ease of winding the hair, the uniform permeability of the drug, the certainty of the cleaning operation and the shortening of the treatment time, and as a result, the design is improved. The purpose is to provide a permanent wave rod that can give excellent permanent wave finish to hair (ridge feeling and tightness to the ends of the hair) while minimizing damage to the hair. It is.

The invention made to solve the above problems is
A cylindrical synthetic resin rod body;
A rod for permanent wave that includes a pair of substantially short cylindrical rubber band locking portions extending at both ends of the rod body and having a plurality of notches on the outside (outer end side in the central axis direction),
The rod body is formed in a net shape,
The ratio (L / R) of the length (L) to the outer diameter (R) of the rod body is 1.5 or more and 2.5 or less.

  The rod for permanent wave has a rod body formed in a net-like shape and is composed of a lattice-like linear material and a mesh-like opening, so that the rod body has high elasticity, and the rod body has high elasticity. The hair can be easily and reliably wound using the hair, and the hair can be tightened strongly. In addition, the rod for permanent wave has a mesh-like opening with a substantially uniform and large area occupancy, so that the rod body has a high liquid flowability and a uniform uniform drug. Easy to apply and reliable. As a result, the permanent wave rod can increase the wave forming efficiency, and can give the hair an excellent ridge feeling and a feeling of grouping up to the hair ends. Furthermore, since the permanent wave rod improves the ease of hair winding work, drug application work and intermediate water washing work as described above, the time required for each work process can be shortened. As a result, damage to the hair can be reduced. Moreover, since the ratio (L / R) of the length (L) to the outer diameter (R) of the rod body is 1.5 or more and 2.5 or less, the permanent wave rod has an outer diameter of the rod body ( Taking R) as a reference, the length (L) of the rod main body is smaller than that of the conventional permanent wave rod, so that the rods can be arranged relatively densely without colliding with each other. As a result, the permanent wave rod can arbitrarily give a wave shape to only a part of the head, and can meet the above-mentioned demand for improving the design of the permanent wave as described above.

  The length (L) of the rod body is preferably 30 mm or greater and 70 mm or less. Thus, by setting the length (L) of the rod main body within the above range, the function of arranging the rods relatively densely without the above-mentioned collision increases, and the ease of imparting a partial wave shape, and thus the design of a permanent wave. Can be increased.

  The opening ratio of the rod body is preferably 30% or more and 70% or less, and the average width of the linear members constituting the rod body is preferably 0.5 mm or more and 2 mm or less. Thus, by making the opening ratio of the rod body and the average width of the linear members constituting the rod body within the above ranges, the above-described hair winding ease, the uniform penetration of the drug, the certainty of the cleaning operation, and The shortening of the treatment time can be further improved, and as a result, the finish of the permanent wave (the ridge feeling and the feeling of grouping up to the hair ends) can be further improved.

  The rod body includes a plurality of right-handed spiral-wound materials arranged in a right-handed spiral shape and a stripe shape with respect to one direction of the central axis, and a left-handed spiral shape and a stripe shape that are symmetrical to this. It is good to have a network structure where a plurality of left-handed wire-like materials to be crossed in a lattice shape. In this way, by making the rod body a network structure in which the right-handed wire material group and the left-handed wire material group are combined in a lattice shape, it is easy to adjust the aperture ratio to the above range and improve the elasticity, In addition, since the wound hair comes into contact with each linear material of the rod body in a dotted manner, one agent may remain between the rod body and the hair during washing, It is possible to prevent the hair from being damaged when the turned hair is pressed with a rubber band.

  The right-handed wire material and the left-handed wire material constituting the rod body preferably have a triangular cross-sectional shape and are arranged so that one corner thereof faces outward in the radial direction of the rod body. In this way, the cross-sectional shape of each linear material is triangular, and each triangular linear material is disposed so that one corner faces radially outward of the cylindrical rod body. Will come into contact with each other in a linear manner (dots with respect to each hair). As a result, according to the means, it is possible to more effectively achieve the effect of preventing the remaining of one agent at the time of washing and the effect of preventing damage to the hair when winding the hair.

  Of the plurality of right-handed wire materials and the plurality of left-handed wire materials, the other wire material group is based on the outer diameter formed by one wire material group (the outer diameter of the virtual cylindrical surface formed by the wire material group). It is preferable to reduce the outer diameter formed by. Thus, by making the outer diameter of the other linear material group smaller than the outer diameter of the one linear material group, only one linear material group mainly comes into contact with the curled hair. Further, it is possible to further improve the effect of preventing one agent from remaining at the time of washing and the effect of preventing damage to hair when winding hair. Moreover, according to the said means, the elasticity of a rod main body further improves, the winding ease of hair improves, and strong tightening of hair becomes easier and reliable.

  The amount of deflection per unit load at the center of the rod body when the load is applied to the center of the rod body from above is preferably from 0.18 mm / N to 0.25 mm / N. Thus, by making the amount of deflection per unit load in the central portion of the rod body within the above range, the rod body is given optimal elasticity for the winding work, and as a result, the hair to the permanent wave rod The ease of winding is further improved, and the shortening of the above-described treatment time is further promoted. In addition, by utilizing the optimal elasticity of the rod body, hair can be wound relatively strongly around the permanent wave rod. As a result, the permanent wave rod can apply a large strain stress to the inside of the hair, and can obtain a higher wave effect and a long-term retention effect of the wave. In addition, the permanent wave finish (ridge feeling and hair end) Can be further improved.

  Here, the “aperture ratio” refers to the ratio of the area occupied by the opening to the entire surface of the rod body. The “rubber rubber” means a thin string-like rubber in the shape of a ring, and includes a rubber band, a rubber band around which a fiber is coated, and the like.

  As described above, the permanent wave rod of the present invention is excellent in hair curling ease, uniform penetrability of medicine, ease of cleaning work and shortening of treatment time, and as a result. Permanent wave finish (ridge feeling and feeling of grouping up to the hair ends) can be given, and at the same time, damage to the hair can be minimized. In addition, since the permanent wave rods can be arranged relatively densely without causing the rods to collide with each other, the wave shape can be arbitrarily given to only a part of the head, thereby improving the design of the permanent wave. be able to.

The perspective view which shows the rod for permanent waves which concerns on one Embodiment of this invention. Side view of the permanent wave rod in FIG. AA line enlarged end view of the permanent wave rod of FIG. Partial enlarged view of the tip of the permanent wave rod of FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
The permanent wave rod 1 shown in FIG. 1 includes a rod body 2 and a pair of rubber band locking portions 3.

  The rod body 2 is formed in a cylindrical shape and is formed in a net shape as a whole. Specifically, the rod body 2 is composed of a plurality of linear members 4 and 5 connected in a lattice shape (including a rhombus lattice shape). More specifically, the rod body 2 includes a plurality of right-handed wires 4 arranged in a right-handed spiral shape and a stripe shape (parallel to each other with a predetermined interval) with respect to one direction of the cylindrical central axis. In contrast, this has a net-like structure in which a plurality of left-handed wire-like members 5 arranged in a left-handed spiral and stripe shape are combined so as to intersect at a predetermined angle. Therefore, a large number of mesh openings 6 such as a substantially square shape, a substantially rhombus shape, and a substantially parallelogram shape are formed in the rod body 2 with a uniform and high area occupancy.

  The permanent wave rod 1 has a rod body 2 formed in a net-like shape, and is composed of lattice-like linear members 4 and 5 and a mesh-like opening 6. The high elasticity of the rod body 2 can be used to wind the hair easily and reliably, and the hair can be tightened strongly. In addition, the permanent wave rod 1 has a mesh body 6 with a rod body 2 formed in a net shape and a substantially uniform and large area occupancy ratio. The liquid flowability is high, and it has an excellent uniform application property of the medicine and easy and reliable cleaning operation. As a result, the permanent wave rod 1 can increase the wave forming efficiency, and can give the hair an excellent ridge feeling and a feeling of grouping up to the hair ends. Furthermore, the permanent wave rod 1 improves the ease of the hair winding operation, the drug application operation and the intermediate water washing operation as described above, so that the time required for each operation process can be shortened. As a result, damage to the hair can be reduced.

  The material for forming the rod body 2 is not particularly limited as long as it has an appropriate elasticity. For example, rubber, synthetic resin, a mixture thereof, or a foam thereof is used. Examples of rubber include natural rubber (NR), butyl rubber (IIR), isoprene rubber (IR), ethylene / propylene rubber (EPDM), butadiene rubber (BR), urethane rubber (U), styrene / butadiene rubber (SBR), Silicone rubber (Q), chloroprene rubber (CR), chlorosulfonated polyethylene rubber (CSM), acrylonitrile butadiene rubber (NBR), chlorinated polyethylene (CM), acrylic rubber (ACM), epichlorohydrin rubber (CO, ECO), fluorine Examples thereof include rubber (FKM). Among the rubbers, butyl rubber (IIR), ethylene / propylene rubber (EPDM), and chlorosulfonated polyethylene rubber (CSM) are preferable in terms of chemical resistance.

  Examples of the synthetic resin include phenol resin (PF), epoxy resin (EP), melamine resin (MF), urea resin (urea resin, UF), unsaturated polyester resin (UP), alkyd resin, polyurethane (PUR), Thermosetting polyimide (PI), polyethylene (PE), high density polyethylene (HDPE), medium density polyethylene (MDPE), low density polyethylene (LDPE), polypropylene (PP), polyvinyl chloride (PVC), polyvinylidene chloride, Polystyrene (PS), polyvinyl acetate (PVAc), acrylonitrile butadiene styrene resin (ABS), acrylonitrile styrene resin (AS), polymethyl methacrylate resin (PMMA), polyamide (PA), polyacetal (POM), polycarbonate (PC) , Degeneration Polyphenylene ether (m-PPE), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), and cyclic polyolefin (COP) and the like.

  Among the above synthetic resins, polypropylene (PP), polyethylene (PE), polyvinyl chloride (PVC), polyethylene terephthalate (PET), polystyrene (PS) in terms of elasticity, chemical resistance, versatility, transparency, etc. Acrylonitrile butadiene styrene resin (ABS), acrylonitrile styrene resin (AS), and polymethylmethacrylic resin (PMMA) are preferable, and polypropylene (PP) is particularly preferable. Among these polypropylene (PP), homopolypropylene (PP) or a mixture of polypropylene (PP) and block polypropylene (PP) is particularly preferable in terms of expressing appropriate elasticity.

  As a material for forming the rod main body 2, one or a mixture of two or more of these materials can be used. In addition to the main materials such as the synthetic resin, the rod body 2 is formed with various materials for the purpose of improving and modifying workability, heat resistance, weather resistance, mechanical properties, dimensional stability, and the like. Additives and the like can be mixed. Examples of the additive include a lubricant, a crosslinking agent, an antioxidant, an ultraviolet absorber, a light stabilizer, a filler, a reinforcing fiber, a reinforcing agent, an antistatic agent, a flame retardant, a flame retardant, a foaming agent, a pigment, Examples include mold agents, fillers, plasticizers, deterioration inhibitors, and dispersants.

  As shown in FIG. 3, the right-handed wire material 4 and the left-handed wire material 5 constituting the rod body 2 have a triangular cross-sectional shape. These linear members 4 and 5 are disposed such that the bottoms thereof are along the inner surface a of the cylindrical rod body 2. As described above, the cross-sectional shape of each of the linear members 4 and 5 is a triangular shape, and the triangular linear members 4 and 5 are arranged so that the bases are along the inner surface a of the cylindrical rod body 2. Since the apex angle (one corner facing the bottom side) of the cross-sectional shape of each linear member 4, 5 is directed outward in the radial direction of the cylindrical rod body 2, it is linear with respect to the wound hair bundle (each It comes into contact with the hair in the form of dots). As a result, the effect of preventing the remaining of one agent at the time of washing and the effect of preventing damage to the hair when winding the hair can be more effectively exhibited. In addition, as for the linear materials 4 and 5, the vertex angle of the cross-sectional shape is rounded and the damage | damage prevention effect | action to the hair at the time of winding the above-mentioned hair is further heightened.

  Regarding the cross-sectional shape of each linear member 4, 5 of the rod body 2, as shown in FIG. 3, a plurality of left-handed winding members 5 are configured from the outer diameter of the virtual cylindrical surface b formed by the plurality of right-handed winding members 4. The outer diameter of the virtual cylindrical surface c is reduced. That is, the cross-sectional shape of the plurality of right-handed winding members 4 is made larger than the cross-sectional shape of the plurality of left-handing members 5, and the ridgeline of the right-handing member 4 is radially outward from the ridgeline of the left-handing member 5. It protrudes. Thus, by making the outer diameter of the other linear material group smaller than the outer diameter of the one linear material group, only one linear material group mainly comes into contact with the curled hair. Further, it is possible to further improve the effect of preventing one agent from remaining at the time of washing and the effect of preventing damage to hair when winding hair. Moreover, according to the said means, the elasticity of the rod main body 2 further improves, the ease of winding the hair improves, and the tightening of the hair becomes easier and more reliable.

  The lower limit of the ratio (L / R) of the length (L) to the outer diameter (R) of the rod body 2 is preferably 1.5, and particularly preferably 1.8. On the other hand, the upper limit of the ratio (L / R) is preferably 2.5, and particularly preferably 2.3. The outer diameter (R) of the rod main body 2 is the outer diameter of the virtual cylindrical surface b formed by a plurality of right-handed wires 4 having a large cross-sectional shape. Thus, by setting the ratio (L / R) of the length (L) to the outer diameter (R) of the rod body 2 within the above range, Since the length (L) of the main body 2 is smaller than that of the conventional permanent wave rod, the rods can be arranged relatively densely without colliding with each other. As a result, the permanent wave rod 1 can arbitrarily give a wave shape to only a part of the head, and can meet the present day demand for improving the design of the permanent wave as described above.

  The lower limit of the length (L) of the rod body 2 is preferably 30 mm, and particularly preferably 40 mm. On the other hand, the upper limit of the length (L) is preferably 70 mm, and particularly preferably 60 mm. Thus, by setting the length (L) of the rod body 2 within the above range, the above-described function of arranging relatively densely without collision increases, and the ease of imparting a partial wave shape, and thus the design of a permanent wave. Can increase the sex.

  The lower limit of the aperture ratio of the rod body 2 is preferably 30%, and particularly preferably 40%. On the other hand, the upper limit of the aperture ratio of the rod body 2 is preferably 70%, and particularly preferably 60%. If the opening ratio of the rod body 2 is smaller than the above lower limit, it becomes difficult to evenly apply the permanent agent or to wash out one agent in the intermediate water washing due to a decrease in the fluidity of the liquid. As a result, the ease of winding the hair onto the permanent wave rod 1 due to the lowering of the property is reduced, leading to the extension of the permanent treatment time. On the other hand, if the opening ratio of the rod body 2 exceeds the above upper limit, the finish of the permanent wave may be lowered due to the elasticity of the rod body 2 being too small.

  The lower limit of the average width of the linear members 4 and 5 of the rod body 2 is preferably 0.5 mm and particularly preferably 1 mm. On the other hand, the upper limit of the average width of the linear members 4 and 5 is preferably 3 mm, and particularly preferably 2 mm. By setting the average width of the linear members 4 and 5 within the above range, the efficiency and certainty of intermediate water washing can be increased, and one agent can be washed away easily and reliably. As a result, the permanent wave rod 1 can be applied with two agents in a state in which no excess agent remains on the hair, and consequently, the two agents can penetrate into every part of the hair. Therefore, the permanent wave rod 1 can maximize the oxidizing action of the two agents, thereby improving the permanent wave formation efficiency, the beauty of the permanent wave finish, and the life. On the contrary, if the average width of the linear members 4 and 5 is smaller than the lower limit, the strength of the rod body 2 is lowered, and it may be difficult to wind the hair around the permanent wave rod 1. On the other hand, when the average width of the linear members 4 and 5 exceeds the above upper limit, it becomes difficult to wash out one agent in the intermediate water washing, and at the same time, there is a risk of unevenness in the adhesion of the two agents to the hair.

  The apex angle α of the linear members 4 and 5 in the cross-sectional shape perpendicular to the axial direction is preferably 60 ° or greater and 100 ° or less, and particularly preferably 70 ° or greater and 90 ° or less. When the apex angle α of the linear members 4 and 5 exceeds the above upper limit, the opening ratio decreases, and it may be difficult to wash out one agent in the intermediate water washing. On the other hand, if the apex angle α of the linear members 4 and 5 is smaller than the lower limit, the rigidity of the rod body 2 may be reduced, and the curling workability of the hair may be reduced. In addition, the hair may be tightened. May be difficult.

  The pair of rubber band locking portions 3 are formed in a substantially short cylindrical shape and extend at both ends of the rod body 2. The pair of rubber band locking portions 3 has a plurality of cutout portions 7 cut in the axial direction at substantially equal angular intervals on the outer side (both ends of the permanent wave rod 1), and between the cutout portions 7. It has a plurality of rectangular plate-like tongue portions 8 formed at equal angular intervals.

  In the permanent treatment step, the hair is wound around the permanent wave rod 1, and in this state, a rubber band (not shown) is stretched over the permanent wave rod 1 in the longitudinal direction (axial direction). 1 is fixed to the hair (not shown), but the permanent wave rod 1 is stably fixed to the hair by inserting the rubber band stretched over the permanent wave rod 1 into the two pairs of notches 7 facing each other. Is done.

  On the outer surface side of the square plate-like tongue piece portion 8 of the pair of rubber band locking portions 3, a plurality of axially protruding ridge portions 9 are formed. In general, in the permanent treatment process, the hair winding operation is performed by rotating the permanent wave rod 1 while holding the rubber band locking portion 3, and a plurality of ridges on the outer surface side of the tongue piece portion 8. It can reduce that a finger | toe slips by the part 9, and the winding workability | operativity of hair can be improved more.

  Each size of the rubber band locking portion 3 is not particularly limited as long as the rubber band can be stretched over the permanent wave rod 1 in a state where the hair is wound around the rod body 2, and the thickness and tension of the rubber band are not limited. It is appropriately selected depending on the like.

  As a material for forming the pair of rubber band locking portions 3, the same material as the material for forming the rod body 2 is used.

  The manufacturing method of the permanent wave rod 1 is not particularly limited as long as the above structure can be manufactured, and a known manufacturing method is appropriately employed depending on the shape, the material to be used, and the like. As a method for manufacturing the permanent wave rod 1, for example, injection molding or the like is preferably used. Moreover, this rod main body 2 and a pair of rubber band latching | locking part 3 may be integrally molded, and may be shape | molded separately.

  The lower limit of the amount of deflection per unit load of the central portion of the rod body 2 when the lower portion of the permanent wave rod 1 is supported and a load is applied to the central portion of the rod body 2 from above is 0.18 mm / N. Is preferable, and 0.19 mm / N is particularly preferable. On the other hand, the upper limit of the amount of deflection per unit load at the center of the rod body 2 is preferably 0.25 mm / N, and more preferably 0.2 mm / N. Since the amount of deflection per unit load in the central portion of the rod body 2 is within the above range, the permanent wave rod 1 can have the most suitable elasticity for the winding operation, and as a result, the hair can be made very easily. Wrapping can be performed, so that the treatment time can be shortened. Further, since the amount of deflection per unit load at the central portion of the rod body 2 is within the above range, the hair can be tightened with an appropriate force by utilizing the optimum elasticity for winding. A larger strain stress can be applied to the inside, and a higher wave effect can be given to the hair, and at the same time, the wave can be held for a long time. Conversely, if the amount of deflection per unit load at the central portion of the rod body 2 is smaller than the lower limit, the rod body 2 becomes too soft and it may be difficult to wrap the hair around the permanent wave rod 1. On the other hand, if the amount of deflection per unit load at the center of the rod body 2 exceeds the above upper limit, the elasticity of the rod body 2 is lowered, so that the certainty of the winding work is lowered and it is difficult to wind the hair tightly. . As a result, it becomes difficult to apply a large strain stress to the inside of the hair, which may lead to a reduction in the wave effect and ridge feeling.

  As described above, the permanent wave rod 1 is excellent in the ease of winding the hair, the uniform permeability of the medicine, the certainty of the cleaning operation, and the shortening of the treatment time. Moreover, since the ratio (L / R) of the length (L) with respect to the outer diameter (R) of the rod body is 1.5 to 2.5, the permanent wave rod 1 causes the rods to collide with each other. Without being relatively dense. As a result, the permanent wave rod 1 can arbitrarily give a wave shape to only a part of the head, and can meet the present day demand for improving the design of the permanent wave as described above. Furthermore, the permanent wave rod 1 can reduce the manufacturing cost by integrally forming the rubber band locking portion 3 and the rod body 2.

  The permanent wave rod of the present invention is not limited to the above embodiment. For example, in the permanent wave rod, the right-handed wire material and the left-handed wire material can have the same cross-sectional shape, and the surface of the rod body can be flush. Thus, even if the rod main body surface which consists of a linear material group is made flush | planar, the 1 agent remaining prevention effect in the above-mentioned washing | cleaning and the damage prevention effect | action to the hair at the time of winding hair can be show | played.

  In addition, the permanent wave rod does not have to form each linear member so that the inner surface of the rod body is flush. For example, with respect to a pair of linear material groups, one linear material group may be disposed radially outward and the other linear material group may be bonded radially inward. Thus, even if the inner surface of the rod body made of the linear material group is not flush with each other, the effect of preventing the remaining of one agent at the time of washing as described above and the effect of preventing damage to the hair when winding the hair can be achieved. .

  The rod main body is a lattice of a plurality of longitudinal linear materials arranged in a stripe shape substantially parallel to the central axis direction and a plurality of circumferential linear materials arranged in a stripe shape in the circumferential direction. You may have the network structure combined in the shape. Such a network structure can also have the effect of preventing one agent from remaining at the time of washing and the effect of preventing damage to the hair when winding the hair.

  The cross-sectional shape of the linear material constituting the rod body is not limited to the above-described triangular shape, and may be, for example, a circle, a square, or the like. Damage prevention effect can be achieved.

  The rod body may have a curved shape so that the diameter gradually decreases toward the center in the axial direction. In this way, by forming the rod body into a curved shape so as to gradually reduce the diameter toward the center in the axial direction, a gap can be formed between the rod body and the stretched rubber band, and hair folds can be formed. Easiness of turning and preventing damage to hair can be improved.

  You may have the cyclic | annular protruding item | line part which protrudes to radial direction outward in the both ends vicinity of the said rod for permanent waves. Thus, by having the annular ridges in the vicinity of both ends, a gap can be formed between the rod body and the rubber band in a state where the rubber band is stretched around the notches of the pair of rubber band locking portions. Therefore, the permanent wave rod presses the curled hair with a rubber band even when the rod body does not have a concavely curved shape so that the diameter of the rod body gradually decreases toward the axial center. It is possible to prevent the rubber band traces from remaining on the hair after treatment.

  EXAMPLES Hereinafter, although this invention is explained in full detail based on an Example, this invention is not interpreted limitedly based on description of this Example.

[Example 1]
Using a random polypropylene, a rod body and a pair of rubber band locking portions as shown in FIG. 1 were integrally formed by injection molding to obtain the permanent wave rod of Example 1. This permanent wave rod has an outer diameter of 26 mm, a thickness of 1.5 mm, a length of the rod body (length in the axial direction) of 53 mm, a length of a rubber band locking portion of 7 mm, and a right-handed wire-like material. Was 1.5 mm, the left-handed wire width was 1 mm, and the opening ratio of the rod body was 45%. The right-handed winding material and the left-handing winding material of the rod body were arranged in a direction inclined by approximately 45 ° with respect to the axial direction of the rod body.

[Example 2]
A permanent wave rod of Example 2 was obtained in the same manner as in Example 1 except that homopolypropylene was used.

[Example 3]
A permanent wave rod of Example 3 was obtained in the same manner as in Example 1 except that a resin in which homopolypropylene and block polypropylene were mixed at a ratio of 1: 1 was used.

[Example 4]
A permanent wave rod of Example 4 was obtained in the same manner as in Example 1 except that block polypropylene was used.

[Comparative Example 1]
A permanent wave rod of Comparative Example 1 was obtained by integrally forming a pair of rubber band locking portions similar to those in Example 1 above and a cylindrical rod body having no opening using polypropylene by injection molding. The length of the rod main body was 79 mm, and the other rod main bodies and the rubber band locking portions had the same outer diameter, thickness, etc. as in Example 1 above.

[Comparative Example 2]
Comparative Example 2 using polycarbonate and integrally forming a pair of rubber band locking portions similar to those in Example 1 above and a rod body having nine slits from the center in the left-right direction and at substantially equal angular intervals by injection molding A permanent wave rod was obtained. The length of the rod main body was 79 mm, and the outer diameter and thickness of the rod main body and the rubber band locking portion were the same as those in Example 1. The opening ratio of the rod body by the slit was about 25%.

[Evaluation of characteristics]
Using the permanent wave rods of Examples 1 to 4 and Comparative Examples 1 and 2, the amount of deflection per unit load at the center of the rod body of each permanent wave rod was measured by the following method. In addition, using the permanent wave rods of Examples 1 to 4 and Comparative Examples 1 to 2, a beautician with a career of 10 years or more actually performed permanent processing on a female subject and evaluated the following. The results are shown in Table 1 below.

(1) Amount of deflection per unit load at the center of the rod body Length / Measurement with speedometer ("MX-500N-E" manufactured by Imada Co., Ltd.) A flat attachment (manufactured by Imada Co., Ltd.) was set. Attach a digital force gauge ("ZP-100N" manufactured by Imada Co., Ltd.) and place a pair of triangular prisms on this stand. Permanent wave so that both ends of the rod body are in contact with the pair of triangular stands. The rod is placed, the attachment is lowered vertically to the center of the rod body, the force of 3 [N], 5 [N] and 7 [N] that can act during the winding work is applied, and the amount of bending (force The distance traveled by the gauge) was measured. The average value of values obtained by dividing the measured values by the corresponding force was defined as the amount of deflection.

(2) Winding evaluation ○ When the hair can be easily wound around the rod body in a relatively short time in the winding operation, ○ when the hair feels a little labor, Δ when the winding is very laborious Was evaluated as x.

(3) Evaluation of ease of intermediate water washing ○ When the intermediate water washing can be carried out very easily and reliably ○, when the intermediate water washing involves some difficulty △, when the intermediate water washing involves great difficulty Comparative evaluation was made as x.

(4) Evaluation of ease of penetration of the two agents into the hair ○ When the agent can be easily penetrated into every part of the hair ○, the agent can penetrate into every part of the hair However, a comparative evaluation was made with a case where some difficulty was observed as Δ and a case where the two agents could not penetrate all parts of the hair as X.

(5) Ridge evaluation Regarding the hair after treatment, a case where excellent elasticity and a feeling of standing up are obtained, a case where moderate elasticity and a feeling of rising at the root are obtained, and a desired feeling of elasticity. And the case where a feeling of rising at the root was not obtained was evaluated as x.

(6) Evaluation of unity of hair tips Comparative evaluation of the treated hair as ○ when the feeling of uniting up to a good tip is obtained, and × when the feeling of uniting up to the desired tip is not obtained did.

(7) Hair damage prevention evaluation After the treatment, the case where hair damage was not felt was evaluated as ◯, the case where hair damage was felt a little, and the case where hair damage was felt as x.

  The permanent wave rods of Examples 1 to 4 having moderate flexibility and elasticity have the ease of winding hair in the winding operation as compared to the comparatively hard permanent wave rods of Comparative Examples 1 and 2. is doing. In addition, the permanent wave rods of Examples 1 to 4 having a large opening ratio are superior to the permanent wave rods of Comparative Examples 1 and 2 having a small opening ratio, and the excellent ease of intermediate water washing and Easy to penetrate. Therefore, the permanent wave rods of Examples 1 to 4 have a shorter treatment time than the comparatively hard permanent wave rods of Comparative Examples 1 and 2, and have excellent ridge properties and hair tips. The tightness and hair damage prevention properties are expressed.

  As described above, the permanent wave rod of the present invention is useful as a tool for permanent wave treatment in a beauty salon or the like, and is particularly suitable for a hairdresser who has little experience or personal use at home.

DESCRIPTION OF SYMBOLS 1 Permanent wave rod 2 Rod main body 3 Rubber band locking part 4 Right-handed wire material 5 Left-handed wire material 6 Mesh-like opening part 7 Notch part 8 Square plate-like tongue piece part 9 Projection part a Rod inner surface b Virtual Cylindrical surface c Virtual cylindrical surface α Vertical angle

Claims (8)

A cylindrical synthetic resin rod body;
A permanent wave rod comprising a pair of substantially short cylindrical rubber band engaging portions extending at both ends of the rod body and having a plurality of cutout portions on the outside,
The rod body is formed in a net shape,
A permanent wave rod, wherein a ratio (L / R) of a length (L) to an outer diameter (R) of the rod body is 1.5 or more and 2.5 or less.   The permanent wave rod according to claim 1, wherein the length (L) of the rod body is 30 mm or greater and 70 mm or less.   The permanent wave rod according to claim 1 or 2, wherein the opening ratio of the rod body is 30% or more and 70% or less.   4. The permanent wave rod according to claim 1, wherein an average width of the linear material constituting the rod body is 0.5 mm or more and 2.5 mm or less. 5.   The rod body is arranged in a right-handed spiral shape and a stripe shape with respect to one direction of the central axis, and symmetrically arranged in a left-handed spiral shape and a stripe shape. The permanent wave rod according to any one of claims 1 to 4, wherein the plurality of left-hand wound wire-like members have a net-like structure intersecting in a lattice pattern.   The right-handed wire material and the left-handed wire material constituting the rod body have a triangular cross-sectional shape, and one corner thereof is disposed so as to face outward in the radial direction of the rod body. Permanent wave rod.   The outer diameter which the other linear material group comprises is made smaller than the outer diameter which one linear material group comprises among the said several right-handed winding material and several left-handed winding material. Item 7. The permanent wave rod according to item 6.   The bending amount per unit load of the central portion of the rod body is 0.18 mm / N or more and 0.25 mm / N or less when the lower portion is supported and a load is applied to the central portion of the rod body from above. Item 8. The permanent wave rod according to item 7.

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