KR0179231B1 - Shaver with shaving aid composite and method for manufacturing same - Google Patents

Abstract

The present invention relates to a wet razor having a shaving aid composite containing a shaving aid and a manufacturing method thereof. In order to provide a razor with a shaving aid composite which can uniformly release an effective amount of the shaving aid without deforming or leaving the shaving aid composite over the entire life of the shaver, and can suppress the growth of bacteria or fungi, (12, 12 '), a shaving razor comprising a cap member (13) having a skin contacting surface (19) and made of a high impact polymer material, and a shaving aid composite (15) containing a shaving aid and located on said skin contacting surface. The cap member (13) comprising the shaving aid composite (15) is a pellet comprising a mixture of 55 to 85 wt% of a water-leachable shaving aid material and 45 to 15 wt% of a water-insoluble polymer material. First extrusion into a shape; 0.5 to 5% by weight of calcium stearate, 0.5 to 2% by weight of zinc, 1 to 5% by weight of ethylene vinyl acetate, 1 to 5 waxes, based on the weight of the pellet-shaped primary extrudate to the pellet-shaped primary extrudate Mixing 2% by weight, and 1 to 7% by weight of the antimicrobial bio-ceramic, followed by secondary extrusion into pellets; And double-injecting the pellet-shaped secondary extrudate and the high impact polymer material, wherein the impact-resistant polymer material is molded by the cap member 13, and the pellet-shaped secondary extrudate is formed by the cap member ( Causing the shaving aid composite 15 to be molded at a location on the skin contacting surface 19 of 13); It is prepared by a method comprising a.

Description

Shaver with shaving aid composite and method for manufacturing same

[Technical Field]

The present invention relates to a razor, and more particularly, to a razor having a shaving aid composite containing a shaving aid and a method of manufacturing the same.

[Background]

In the use of the razor, discomfort or damage to the razor skin may be caused by factors such as the frictional traction of the razor blade passing over the skin, the force necessary for hair cutting, and the already existing skin wound or irritation. In order to reduce these problems associated with shaving, shaving aids, such as lubricants, softeners, razor cleaners, cosmetics, or combinations thereof, may be taken before and / or after shaving in a separate route from the shaver. A method of applying to the skin on the way has been used.

However, a shaver having a shaving aid separated from the shaver separately applied to the skin is not only inconvenient to use, but also has problems in maximizing the efficacy of the shaving aid. That is, it is cumbersome to apply the shaving aid to the skin during or before or after shaving, and the shaving aid applied before shaving is likely to evaporate or be removed from the skin as the shaving proceeds, Shaving aids are not present in the skin during shaving and may therefore be substantially ineffective in removing such discomfort.

Therefore, as a countermeasure to solve the problem of applying the shaving aid separated from the shaver to the skin, the shaving system includes a water-leachable shaving aid such as polyethylene oxide directly in the shaver. For example, a technique in which a shaving aid is deposited in a recess formed in a shaver, a technique of directly incorporating a shaving aid into a polymer component used for forming a shaving blade support member of a shaver, and containing a shaving aid in a proper position of the shaving blade support member. A technique of bonding and fixing a shaving aid composite, a technique of snap-fitting a member formed by injection molding a shaving aid to a shaver, and the like have been developed.

In a shaving system including a shaving aid composite containing a shaving aid directly on the shaver, the following technical problems must be solved.

First, shaving aid composites containing shaving aids must have sufficient mechanical strength to ensure that the shape of the shaving aid composite does not depart partially or entirely from the shaver and does not deform its shape during the life of the shaver.

Second, a sufficient amount of water-leachable shaving aid must be able to be released continuously in a constant amount to eliminate discomfort and prevent skin damage throughout the life of the shaver.

Third, skin side effects due to bacterial propagation in shaving aid complex should be minimized.

Examples of the prior art in which the shaving aid composite is directly attached to the skin contacting surface of the shaver include US Patent 4,624,051, International Application Publications W092 / 05924, W092 / 05925, and W092 / 05929.

U.S. Patent 4,624,051 proposes a structure for fixing the shaving aid complex to the skin contacting surface of the shaver as a method of uniformly releasing the water-leachable shaving aid during the shaver life without damaging the shaving aid complex. Disclosed is the shape of the shaving aid composite and the structure of the skin contacting surface of the shaver holding the composite.

W092 / 05924 includes a shaving aid composite consisting of a water-leaching shaving aid (eg polyethylene oxide) and a water insoluble matrix polymer (eg polystyrene) and attached to the skin contacting surface of the shaver, maintaining the mechanical strength of the shaving aid composite. In order to improve the release ability of the shaving aid while improving the shaving aid composites further comprising a water-soluble low molecular weight release enhancer (eg polyethylene glycol).

W092 / 05925 is a shaving aid composite consisting of a water-leaching shaving aid (e.g. polyethylene oxide) and a water insoluble matrix polymer (e.g. polystyrene) and attached to the skin contacting surface of the shaver, for the purpose of improving shaving performance. A technique is disclosed for shaving aid composites further comprising a water-insoluble essential oil substance released into the skin together with the razor shaving aid.

Finally, in W092 / 05929, shaving aid composites comprising a water soluble shaving aid (e.g. polyethylene oxide) and a water insoluble matrix polymer and attached to the skin contacting surface of the shaver, by using ethylene vinyl acetate as the water insoluble matrix polymer A technique for producing shaving aid composites at lower processing temperatures is disclosed.

However, none of the prior art techniques evenly releases the shaving aid complex fixed to the skin contacting surface of the shaver evenly in an effective amount of shaving aid that has sufficient durability without shaping or leaving during shaving life and prevents skin damage or discomfort. Not only does not remove the side effects of the growth of bacteria and the like.

Accordingly, an object of the present invention is to solve various problems of the razor having the shaving aid composite described above, and to uniformly release an effective amount of the shaving aid without deforming or leaving the shaving aid composite for the entire life of the shaver. To provide a shaving aid composite containing a shaving aid, which can suppress the growth of bacteria and fungi, and a method of manufacturing the same.

1 is a perspective view of the head of the razor having a shaving aid composite according to the present invention.

2 is a cross-sectional view taken along the line A-A of FIG.

* Explanation of symbols for main parts of the drawings

1 shaver head 11 base member

12, 12 ': Razor blade 13: cap member

14: rivet portion 15: shaving aid composite

16 coupling structure 19 skin contact surface

According to the present invention, there is provided a method for attaching a shaving aid composite to a cap member of a shaver which is made of an impact resistant polymer resin and has a skin contact surface in contact with the skin when shaving, and a razor manufactured according to the method. The method for attaching the shaving aid composite to the step, the first step of the extrusion of pellets by mixing 55 to 85% by weight of the water-leachable shaving aid material and 45 to 15% by weight of the water-insoluble polymer resin, 1 of the pellet shape 0.5 to 5 weight percent calcium stearate, 0.5 to 2 weight percent zinc, 1 to 5 weight percent ethylene vinyl acetate, 1 to 5 weight percent wax, and antibacterial to the primary extrudate based on the weight of the pellet shaped primary extrudate 1 to 7% by weight of the bio-ceramic mixture, the step of secondary extrusion into pellet form, and the impact-resistant polymer resin and the pellet-shaped secondary extrudates are respectively the cap member and Group comprises a step of double injection for secondary extrudate and the polymer resin in impact resistance of the pellets to be shaped into the shaving aid composite on the skin contact surface of the cap member.

Hereinafter, a razor having a shaving aid composite according to the present invention and a manufacturing method thereof will be described in detail with reference to the accompanying drawings.

First, the structure of the razor according to the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view showing only the head portion of a razor having a shaving aid composite made in accordance with the present invention, and FIG. 2 is a sectional view taken along the line A-A of FIG.

The razor head portion 1 shown in FIG. 1 is detachably coupled to the razor handle portion. As shown in FIG. 2, the head portion of the razor can be detachably attached to the handle portion as shown in FIG. The coupling structure 16 is provided.

The razor head portion 1 comprises a shaving aid composite containing an impact resistant base member 11, razor blades 12, 12 ′, an impact resistant cap member 13, a rivet portion 14, and a shaving aid ( 15).

The base member 11 comprises a coupling structure 16 to which the handle is coupled and a horizontally extending guard structure 17 which forms a front face about the razor blade, the razor blades 12 and 12 ′ being described above. The spacers 18 are disposed on the base member and spaced apart at regular intervals. The cap member 13 includes a main body 19 that extends laterally to form a skin contact surface, and a front end 20 positioned behind the rear blade 12 '. The base member 11, the razor blades 12 and 12 ', the spacer 18, and the cap member 13 are assembled by fastening rivets to the rivet portions 14 formed thereon.

The shaving aid composite 15 is double-injected simultaneously with the shaping of the cap member 13 such that the shaving aid composite 15 is positioned on the skin contact surface (body portion) 19 of the cap member 13 according to a method described below. Is formed in a manner.

FIG. 1 shows an example of a razor configured to fix the razor blades 12 and 12 'between the base member 11 and the cap member 13, but a member forming the shaving aid composite and the skin contact surface by double injection. All shavers having a structure that can be applied to the present invention.

Hereinafter, a method of attaching the shaving aid composite to the cap member of the razor having the skin contact surface will be described.

The method of the present invention is largely composed of three steps. The first process is a process of firstly extruding into a pellet form by mixing a water-leachable shaving aid material and a water-insoluble polymer resin (matrix) to form a shaving aid composite.

Since the water-leachable shaving aid material is generally in the form of a powder, it is difficult to mold, and since it is a water-soluble material, it is difficult to preserve its shape in water. Difficult to form Thus, as disclosed in the above-mentioned prior art document, the water-insoluble polymer resin is mixed and extruded as a matrix to maintain the shape of the water-leachable shaving aid material in water. However, the water-leachable shaving aid and the water-insoluble polymer resin are incompletely mixed because they are essentially different in their basic physical properties.

Thus, as disclosed in the aforementioned prior art, the blend of water-leachable shaving aid material and water-insoluble polymer resin is extrusion molded into a rod or sheet shape as it is, and sliced thinly to shave aid composite as a finished product. After the preparation, and then attached to the skin contacting surface of the shaver, the amount of shaving aid material leached from the shaving aid complex during shaving is difficult to maximize its efficacy, and also shaving aid complex is deformed before the life of the shaver Or partly away from the razor.

For this reason, the present invention produces pellet-shaped semifinished products in the first process without extrusion molding the shaving aid composite directly into the finished product from the blended brand of the water-leaching shaving aid material and the water-insoluble polymer resin.

In the first process of the present invention, except for the pelletization, the conventional materials may be basically applied to the materials, reaction conditions, and the like.

Examples of suitable water-leaching shaving aids used in the first process include polyethylene oxide, polyvinyl pyrrolidone, polyacrylamide, hydroxypropyl cellulose, polyvinyl imidazoline, polyhydroxyethyl methacrylate, silicone copolymers. , Sucrose stearate, vitamin E, or aloe can be used, and polyethylene oxide having a molecular weight of 1.0 × 10 ⁵ to 8.0 × 10 ⁶ is preferred.

As examples of the water-insoluble polymer resin, ie, the matrix material, polystyrene, polyethylene, polypropylene, polyacetyl can be used, and impact resistant polystyrene is preferred.

The water-leaching shaving aid and the water-insoluble polymer resin are used at 55 to 85% by weight and 45 to 15% by weight, respectively. If the water-leachable shaving aid is used below 55% by weight, the amount of shaving aid released to the skin during shaving is not released in an amount sufficient to exert its effect. On the other hand, when more than 85% by weight is used, the content of the water-insoluble polymer resin, which is a matrix, is relatively low, resulting in insufficient mechanical strength of the final shaving aid composite. It is preferred to use 65 to 75% by weight of the water-leachable shaving aid material and 35 to 25% by weight of the water-insoluble polymer resin in view of the efficacy and mechanical strength of the final shaving aid composite.

The second step is a step of secondly extruding into pellets by mixing calcium stearate, zinc, ethylene vinyl acetate, wax, and antimicrobial bioceramic to the pellet-shaped primary extrudate prepared in the first step. .

0.5 to 5% by weight of calcium stearate and 0.5 to 2% by weight zinc, 1 to 5% by weight of ethylene vinyl acetate and 1 to 5% by weight wax as lubricant, based on the weight of the pellet-shaped primary extrudate, and 1 to 7% by weight of the antimicrobial bioceramic as an antimicrobial agent is mixed into the pellet-shaped primary extrudate and extruded again to stabilize the mixed state of the unstable primary extrudate and impart antimicrobial properties. This ensures a constant leaching of the shaving aids from the shaving aid complexes during the entire life of the shaver and does not deform or depart from the shaving aid complexes, as well as inhibits the growth of mold and bacteria during storage, which ensures hygiene at all times of use. . PeEVA is preferable as ethylene vinyl acetate, and polyethylene wax (PeWAX) is preferable as a wax.

In addition, if necessary, by mixing with 1 to 10% by weight of fragrance components, such as acacia, or a lilac flavor, such as calcium stearate and extruded, the fragrance can be generated when using the shaver.

As the extruder used for the extrusion of the second process, a single screw extruder of a gas partial discharge type having a cylinder diameter of 40 to 100 mm may be used, and extrusion conditions include cylinder temperature; 110 to 150 ° C, extrusion pressure; 7 to 10 kg / cm ² , rotation speed; It is appropriate to set it at 1,000 to 2,000 RPM, and it is preferable to extrude the pellet mixture to have a residence time within 5 minutes until the extrusion is completed through the hopper of the extruder.

The final third process is to double-inject the pellet-shaped secondary extrudate and the impact resistant polymer resin so that the impact resistant polymer resin is molded into the cap member 13 having the skin contacting surface 19. The primary pellet-like extrudate is a process of shaping the shaving aid composite 15 located on the skin contact surface 19 adjacent to the razor blades 12, 12 'at a predetermined distance.

In other words, the shaving aid composite is molded separately and sliced into a suitable shape to be mechanically fixed to the skin contact surface of the shaver cap member or adhered by an adhesive, but to a two material injection machine having two cylinders. By double-injecting the impact-resistant polymer resin constituting the cap member 13 and the secondary pellet-like extrudates in the semi-finished state, the cap member 13 and the shaving aid composite 15 of the shaver are integrally formed.

The shaving head portion 1 is manufactured by fastening the cap member 13 provided with the shaving aid composite 15 thus manufactured with the razor blades 12 and 12 'and the base member 11 with rivets.

The operating conditions applied to the double injection of the third process include injection pressure; 70 to 75 kg / cm ² , injection speed; 5 to 15%, injection temperature; 140 to 180 ° C. (secondary pelletized extrudate), 190 to 230 ° C. (impact resistant polymer resin), clamping force; It is preferable to set it as 1,000 kg / cm <^2> .

EXAMPLE

Hereinafter, the present invention will be described in more detail with reference to Examples. The examples are only intended to illustrate the invention, and are not intended to limit the scope of the invention.

Example 1

Of 70% by weight polyethylene oxide (molecular weight; 2.73 × 10 ⁶⁾ and 30% by weight of high impact polystyrene (molecular weight; 3.45 × 10 ⁶⁾ a small amount of fumed silica to a mixed brand, butylated hydroxy toluene, ammonia, ethyl amine, etc. Was added to extrude the pellet shape through a single screw haak extruder. At this time, the cylinder pressure of the extruder was about 250kg / cm ² , the die pressure was about 100kg / cm ² , and the temperature of the extruder was about 150 ° C.

In a pellet-shaped primary extrudate, based on the weight of the extrudate, 2% by weight calcium stearate, 1% by weight Zn, 4% by weight PeEVA, 4% by weight PeWAX, 5% by weight antibacterial bioceramic, And 3% by weight of acacia flavorings were thoroughly mixed and then extruded into pellets through a 50 mm diameter single screw extruder (gas partial discharge type). At this time, the cylinder temperature of the extruder was maintained in the range of 110 to 150 ℃, the extrusion pressure was 7 to 10kg / cm ² , the rotational speed was maintained in the range of 1,000 to 2,000 RPM. The pellet was also extruded to within 5 minutes until extruded through the hopper of the extruder.

The resulting secondary pelletized extrudates and impact resistant polystyrene are separately introduced into each hopper of the double injection machine, and as shown in FIG. 1, the impact resistant polymer resin causes the cap member 13 to be molded. The second pellet-type extrudates were double injected to form a band shaving aid composite 15 positioned on the skin contact surface 19 adjacent to the razor blades 12 and 12 'at a predetermined distance. At this time, the injection pressure is 70 to 75kg / cm ² , the injection speed is 5 to 15%, the injection temperature is controlled to maintain the secondary pellet-type extrudates 140 to 180 ℃, the impact-resistant polymer resin side 190 to 230 ℃ The clamping force was about 1,000 kg / cm ² .

The cap member 13 having the band-shaped shaving aid composite 15 prepared as described above was fastened to the razor blades 12 and 12 'and the base member 11 by rivets to manufacture the razor head 1. The content of the components used is shown in Table 1.

The cap member 13 provided with the shaving aid composite 15 in 32 ° C. tap water was immersed for 10 minutes to leach the shaving aid, remove moisture, and then dry in an incubator for 30 minutes and then weigh three times. The leaching amount of the shaving aid was measured over, and the shaving aid composite having finished measuring the leaching amount of the shaving aid was left in the air to observe whether the shaving aid complex was deformed or departed. In addition, microscopic observation of the growth of bacteria in the shaving aid complex in a petri dish with some water was carried out.

The results are shown in Table 2 below.

[Example 2 and Example 3]

The shaving aid composite 15 was provided in the same manner as in Example 1 except for varying the amount of polyethylene oxide, impact resistant polystyrene, calcium stearate, Zn, PeEVA, PeWAX, antibacterial bio-ceramic, and fragrance used. Cap member 13 was prepared, the content of the specific components are as shown in Table 1. The cap member with the shaving aid composite prepared according to the present examples was also tested for the amount of the shaving aid leaching in the same manner as in Example 1 (see Table 2).

Comparative Examples 1 and 2

A shaver (commercially available from a third-party product) having a shaving aid composite prepared by mixing a small amount of an additive with polyethylene oxide and an impact-resistant polystyrene and extruding it into a sheet shape and slicing it into a band shape is also available in Examples 1 to 3 above. The same measurement was made, and the results are shown in Table 2.

Note: * 1; After shaving aid leaching, the shaving aid complex, which has been measured, is left in the air and checked for distortion and departure.

*2 ; Check when bacteria are observed after immersing the shaving aid complex in a plate of water.

As can be seen from Table 2, the shaver with the shaving aid composite according to the present invention is approximately 1.35 times the average leaching rate of 10.7% of the comparative example in three shaving aid leaching tests for 10 minutes. It showed an average leaching rate of 14.4%, which means that for shavers with the same weight shaving aid complex, the shaving aid composite of the present invention releases about 1.35 times more shaving aid in water than the shaving aid composite of the comparative example. Means that.

In addition, in the shaving aid composite according to the present invention, the change in leaching rate over time was very small compared to the shaving aid composite of the comparative example, which means that the shaving aid composite according to the present invention uniformly released the shaving aid in comparison with the comparative example. It means.

Above all, the shaving aid composite of the comparative example was subjected to three repeated underwater immersions and drying, and after 5 days, the shaving aid composite band was warped, and after 14 days, the band breaking occurred, whereas The shaving aid composite did not cause warpage or departure of the shaving aid composite for longer than the entire life of the shaver.

In addition, in the shaving aid composite of the present invention, the growth of bacteria was not observed in the humid environment, but the shaving aid complex of the comparative example was observed after 10 days.

As described above, shavers with shaving aid composites according to the present invention are effective amounts of shaving aids without shaving aid complexes partially or totally falling away from the shaver and deforming their shape during the entire life of the shaver. It can release uniformly, and also it can suppress the reproduction of a bacterium or mold. Therefore, it is possible to prevent discomfort or damage to the skin without separately applying a shaving aid to the skin during shaving.

Claims (4)

A method of attaching a shaving aid composite 15 to a cap member 13 of a shaver which is made of an impact resistant polymer resin and has a skin contacting surface 19 which is in contact with the skin when shaving, the water-leaching shaving aid material Mixing 55 to 85% by weight and 45 to 15% by weight of the water-insoluble polymer resin into the pellets, and extruding the pellets into primary pellets, based on the weight of the pellets in the primary extrudate of the pellets. 0.5 to 5% by weight of stearate, 0.5 to 2% by weight of zinc, 1 to 5% by weight of ethylene vinyl acetate, 1 to 5% by weight of wax, and 1 to 7% by weight of antimicrobial bio-ceramic, followed by secondary extrusion into pellet form And the re-impact polymer resin and the pellet-shaped secondary extrudate are molded into the shaving aid composite 15 on the skin contact surface 19 of the cap member 13 and the cap member 13, respectively, Of the pellet shape And double-injecting the second extrudate and the impact resistant polymer resin. The method of claim 1, wherein the water-leachable shaving aid material is polyethylene oxide, polyvinyl pyrrolidone, polyacrylamide, hydroxypropyl cellulose, polyvinyl imidazoline, polyhydroxyethyl methacrylate, silicone copolymer, And sucrose stearate, vitamin E, or aloe, and wherein said water-insoluble polymer resin is selected from the group consisting of polystyrene, polyethylene, polypropylene, and polyacetyl. The method of claim 2, wherein the water-leaching shaving aid material is polyethylene oxide and the water-insoluble polymer resin is impact resistant polystyrene. A shaver having a shaving aid composite (15) attached to a cap member (13) having a skin contact surface (19) in contact with the skin when shaving in accordance with the method of claim 1.