JP5188206B2 - Cosmetic puff and method for producing the same - Google Patents

Description

  The present invention relates to a cosmetic puff particularly suitable for a liquid foundation, in which a gel material is coated with a resin coating layer, and a method for producing the same.

As a cosmetic puff suitable for a liquid foundation, a gel material coated with a thin film has been proposed. Here, the gel material functions to resemble a finger such as softness, and the thin film functions to prevent the penetration of the liquid foundation.
JP-A-6-253927 JP 2005-177163 A

  Here, the puff according to Patent Document 1 is a puff for liquid foundation formed by forming a thin layer (thin film) with a low hardness rubber on the surface of a gel material. Specifically, after forming a wrinkle pattern on a mold and forming the silicon rubber thin layer bag with a crest by transferring the wrinkle pattern, a separately adjusted two-component type is prepared from the opening of the silicon rubber thin layer bag. A gel material for forming a urethane gel is injected and solidified, and then a synthetic leather is adhered to the opening of the thin-layer bag, and the opening is closed to form a puff. However, the above-mentioned puffs can be used without distinction between the front and back sides. In addition, since many processes are performed as described above, there is a problem in that mass productivity is lacking.

  The puff according to Patent Document 2 has a structure in which a stretchable film of urethane and a gel material are bonded together with an adhesive and the gel material is wrapped with the stretchable film. This stretchable film has its four sides sealed by heat welding, and a gel material is contained inside. However, heat-sealing the four sides of the stretchable film has many work steps and is problematic from the viewpoint of productivity. Furthermore, the gel material is filled to such an extent that the adhesion of the adhesive film of the film is improved and the gel material is in close contact with the inner wall of the film, while the film and the gel material are displaced so that the four sides of the film are sealed so that they cannot be wrinkled or kinked It is not easy to do, and there is a problem with mass productivity.

  Accordingly, an object of the present invention is to provide a cosmetic puff that can be used without distinction between the front and back sides, has high productivity, and is mass-productive, and a method for producing the same.

  The present invention (1) is a cosmetic puff produced using a mold and having a gel material and a resin coating layer covering the gel material, wherein a resin coating film is formed on the inner wall of the mold and the resin A cosmetic puff obtained by curing the gel composition in the mold in a state where the gel composition is filled in a coating film.

  The present invention (2) is the cosmetic puff of the invention (1), wherein the resin coating layer is a polyurethane film.

  The present invention (3) is the cosmetic puff of the invention (1) or (2), wherein the gel composition is a two-component polyurethane liquid elastomer.

  The present invention (4) is the cosmetic puff according to any one of the inventions (1) to (3), wherein the gel material has a hardness of F50 to C30.

  The present invention (5) is the cosmetic puff according to any one of the inventions (1) to (4), wherein the inner wall of the mold has a textured surface.

  The present invention (6) is the cosmetic puff according to any one of the inventions (1) to (5), comprising two members, the gel material and the resin coating layer.

  The present invention (7) is a method for producing a cosmetic puff having a gel material and a resin coating layer covering the surface thereof, wherein a resin coating film is formed on the inner wall of the mold and the gel composition is formed in the resin coating film It is a manufacturing method including the process of heating the said mold and hardening the said gel composition in the state with which the thing was filled.

  This invention (8) is a manufacturing method of the said invention (7) whose said resin is 1 liquid polyurethane resin.

  The present invention (9) is the production method of the invention (7) or (8), wherein the gel composition is a two-component polyurethane liquid elastomer.

  According to the present invention (10), the resin coating film is formed in a cavity which is a lower mold, the gel composition is cast inside the coating film, and the upper mold in which the resin coating film is formed in advance is closed. The manufacturing method according to any one of the inventions (7) to (9), further comprising a step of molding.

  The present invention (11) includes a step of introducing a resin solution into a split mold through an inlet, applying the resin solution to the inner wall of the split mold by rotating the split mold, and drying the resin solution. The inventions (7) to (9), further comprising a step of forming the resin coating and a step of filling the gel composition from the inlet into the split mold on which the resin coating is formed. Any one of the manufacturing methods.

  According to the present invention (1), since it is a cosmetic puff obtained by curing the gel composition in a state where the gel composition is confined in a resin coating film formed on the inner wall of the mold, it is a conventional product. Unlike the cosmetic puff obtained by first preparing the gel material and then applying the resin film, there is no distinction between the front and back, and there is no joint of the resin coating layer or compared with the conventional product The joint is inconspicuous, and further, there is an effect that wrinkles and kinks (occurring when the bonding is not successful) that may occur in the conventional product do not exist.

  According to this invention (2), in addition to the said effect, since the resin coating layer is a polyurethane membrane | film | coat, there exists an effect that the elasticity and softness close | similar to the role of skin can be provided gently. Furthermore, when the gel material is a polyurethane gel material, it exhibits high adhesiveness with the gel material, so that even if there is a seam in the puff, there is an effect that breakage at the seam is difficult to occur. .

  According to the present invention (3), in addition to the above effects, a two-component polyurethane liquid elastomer that can easily control the hardness of the gel material after production is used as the gel composition. There is an effect that can be provided.

  According to the present invention (4), in addition to the above effects, since the hardness of the gel material is F50 to C30, there is no fear that the gel material will flow out even if the resin coating layer is broken, and the bottom is applied when the foundation is applied. It is easy to apply without feeling, and has an effect of being excellent in conformity to the unevenness of the skin due to moderate hardness.

  According to the present invention (5), in addition to the above-mentioned effects, the surface is embossed, so that the liquid foundation is held in the depressions on the surface, and this is a little by sliding the fingertip with the puff on the skin. By releasing each one, there is an effect that uniform coating can be realized.

  According to the present invention (6), in addition to the above-described effects, since it is composed of two members, a gel material and a resin coating layer, the manufacturing process can be reduced and the cost can be reduced because no adhesive or the like is used. There is an effect.

  According to the present invention (7), in the state in which the resin coating film is formed in the mold, the gel composition is put into the resin coating film and then cured to produce a cosmetic puff. Compared with the case where a resin coating layer is pasted after forming the film, there is an effect that it is eliminated from the trouble of handling a sticky (adhesive) gel material. Furthermore, in the prior art, when the application of the resin coating layer on the gel material fails, the yield decreases due to the occurrence of defective products such as excessive seams and unacceptable wrinkles and kinks. According to (7), since these defective products do not occur, the yield can be improved. Furthermore, according to the present invention (7), since the gel composition is thermoset in the mold to produce a cosmetic puff, the construction method and equipment can be simplified.

  According to the present invention (8), in addition to the effects described above, since a one-component polyurethane resin is used as the resin, it is possible to form a coating film simply by applying and drying, thereby improving workability. Play.

  According to this invention (9), in addition to the said effect, since the two-component polyurethane liquid elastomer is used as a gel composition, there exists an effect that the hardness of a gel raw material can be controlled easily.

  According to the present invention (10), in addition to the above effects, a cosmetic puff is manufactured using a cavity mold, so that the formation process of the resin coating film is easy, so that the production efficiency can be improved. There is an effect.

  According to the present invention (11), in addition to the above effects, a cosmetic puff is manufactured using a mold, so that it is possible to form an integrated resin coating over the entire surface, so that the seam is more conspicuous. There is an effect that a cosmetic puff can be provided.

  The best mode of the present invention will be described below. The technical scope of the present invention is not limited to the best mode. For example, the gel material according to the best mode is a polyurethane gel material, but the gel material is not limited to this, and a well-known gel material (for example, a gel material described in Patent Document 2) can be used. Furthermore, in this best mode, when the gel composition is cured, the gel composition is cured by applying heat. However, the present invention is not limited to this, and other curing methods such as photocuring and natural curing are used. There may be. Furthermore, in this best mode, all the curing reactions are completed in the mold, but the present invention is not limited to this, and it is a technique in which the gel composition is removed from the mold when cured to some extent and then further cured. May be.

  First, as shown in FIG. 1, the cosmetic puff according to the best mode has a polyurethane gel material 2 inside and resin coating layers 2 a and 2 b that directly cover the polyurethane gel material 2. Therefore, in the following, first, the polyurethane gel material and the resin coating layer which are constituent elements will be described in detail.

Polyurethane gel material (material)
First, the polyurethane gel material according to the best mode is a material obtained by heating and curing a mixture of polyol and isocyanate (two-component polyurethane liquid elastomer). In the present specification, the polyurethane gel is different from the water-containing gel, and is essentially composed of a liquid segment showing a gel state without containing water, so-called liquid segment gel (Liquid Segment Gel). Means. For this reason, the polyurethane gel which concerns on this best form maintains a gel state (soft gel-like elastic body) irrespective of moisture content, and has shape recovery property, dismantling property, etc. In addition, lame, coloring agents, antioxidants, and ultraviolet absorbers can be added to the polyurethane gel material.

  Here, the polyol is not particularly limited as long as it is used in the production of a normal polyurethane gel, and for example, a bifunctional and / or trifunctional polyol alone or a mixture of two or more, and / or And a prepolymer containing a hydroxyl group (OH) at the terminal. For example, polyether polyol, polyester polyol, polycarbonate polyol, polybutadiene polyol or the like can be mentioned. In particular, use of a polyether-based polyol (polyalkylene polyol) is preferable because flexibility and restorability are good.

  Isocyanate is not particularly limited as long as it is used in the production of ordinary polyurethane gels, and examples thereof include polyisocyanate compounds and derivatives thereof and / or prepolymers having isocyanate groups (NCO) at the ends. Examples include, but are not limited to, MDI, TDI, IPDI, HDI, HMDI, PPDI, and XDI. As the isocyanate, any of aliphatic, alicyclic and aromatic can be used, but in order to obtain a non-yellowing type which does not change color even when used for a long period of time, an aliphatic isocyanate can be selected. Is preferred.

  Here, the polyurethane gel having the hardness described later can be obtained, for example, by appropriately adjusting the NCO / OH blending equivalent. Usually, NCO / OH is about 0.5 to 1.2. However, in order to provide flexibility without adding a softener, a plasticizer, oil, or the like, NCO / OH = 0.7 to 0.00. 9 is preferred. Here, when NCO / OH is less than 0.5, an unreacted hydroxy terminal reactive group remains, and sufficient gel strength cannot be obtained. Further, when NCO / OH = 1.2 is exceeded, the isocyanato group easily reacts with moisture to form a rigid gel. Generally, softeners, plasticizers, oils, etc. are often used to give flexibility, but these additives may bleed out and should not be added to the cosmetic puff material according to the best mode as much as possible. It is preferable.

Polyurethane gel material (structure)
The shape of the polyurethane gel material is not particularly limited, and examples thereof include a square shape, a circular shape, and a streamline shape. Moreover, although the thickness of a polyurethane gel raw material has a relationship with the following hardness, normally 4-8 mm is suitable.

Polyurethane gel material (physical properties)
The hardness of the polyurethane gel material is preferably in the range of F50 to C30, more preferably in the range of F70 to 90. When the hardness is less than F50, the gel material may flow out when the resin coating layer is torn, and when the foundation is applied, a feeling of bottoming appears and it is difficult to apply. When the hardness exceeds C30, the touch is considerably harder than that of the finger, and the followability to the unevenness of the skin is inferior. Here, the F code is measured with an Asker F hardness meter, and the C code is measured with an Asker C hardness meter. In addition, about F99-C1, the value close | similar to 100 is shown, when measuring with a F hardness meter, and the value close | similar to 0 is shown when measuring with a C hardness meter. In the case of such a gel material, a value measured by any hardness meter may be used. Note that there is no JIS standard for the sponge hardness tester that covers a wide range of hardness of sponges and gels, and an “Asker C type” measuring instrument conforming to the Japan Rubber Association standard, SRIS 0101 is generally used. Furthermore, a non-standard Asker F-type hardness meter (manufactured by Kobunshi Keiki Co., Ltd.) is used for measurement of hardness lower than the Asker C-type hardness meter. Moreover, it is suitable for the polyurethane gel material which concerns on this best form to have adhesiveness. Thereby, the joining force with the coating layer becomes strong, and it is possible to prevent a situation in which the coating layer is peeled off from the polyurethane gel layer during use. This property can be imparted by leaving unreacted hydroxyl terminal on the surface of the gel material by excessively reacting and curing the polyol.

Coating layer (material)
Next, the coating layer according to the best mode is not particularly limited as long as it is a stretchable film such as resin, natural / synthetic rubber, impermeable nonwoven fabric, and synthetic leather, but polyurethane is particularly suitable. The first reason is adhesiveness with the polyurethane gel material. In the present cosmetic puff, since the coating layer and the polyurethane gel material are directly joined without using an adhesive, it is necessary to have high adhesion between the coating layer and the polyurethane gel material. In particular, when a cosmetic puff is manufactured using a mold, a seam that is more likely to break may occur in the coating layer at the point where the molds are combined with each other as compared with other parts. In such a case, when the cosmetic puff is deformed at the time of use, it is assumed that the joint is broken at the joint and the polyurethane gel material inside is exposed. However, by using a polyurethane resin as the coating layer, a strong adhesive force is generated between the coating layer and the urethane gel material, so that it is difficult to break at the seam, and even if a break occurs. Since the urethane gel material is firmly adhered to the coating layer, the urethane gel material can be prevented from staying inside and being exposed as much as possible. The second reason is that the polyurethane resin is not only gentle to the skin but also has stretchability and softness close to the role of the skin. Coloring agents such as lame and dye can be mixed in the coating layer.

  Here, a suitable polyurethane is a non-yellowing polyurethane-based resin which has a urethane bond in the polymer in advance and hardly changes by light or heat. The non-yellowing polyurethane resin is preferably obtained from a non-yellowing isocyanate compound and polyols by a known method. Examples of non-yellowing isocyanate compounds used in the above reaction include, for example, aliphatic polyisocyanates such as hexamethylene diisocyanate, isophorone diisocyanate, hydrogenated xylene diisocyanate, lysine triisocyanate, and trimethyl diisocyanate, and other non-yellowing isocyanate compounds. And xylene diisocyanate. Moreover, as said polyols, a low molecular polyol and / or a high molecular polyol can be used. Examples of the low molecular polyol include ethylene glycol, diethylene glycol, dipropylene glycol, 1,4-butanediol, 1,6-hexanediol, neopentyl glycol, trimethylolpropane, and the like. Examples of the polymer polyol include polyether polyols such as polytetramethylene ether glycol; poly-β-methyl-σ-valerolactone, polycaprolactone; the diols, adipic acid, sebacic acid, suberic acid, and isophthalate. Examples include polyester polyols such as polyesters composed of dibasic acids such as acids; polycarbonate polyols; epoxy polyols; polyether ester polyols, acrylic polyols, and the like, preferably polyester polyols that are not easily yellowed, polycarbonate polyols, and the like. This non-yellowing polyurethane resin preferably has a softening point of 50 to 170 ° C, more preferably a softening point of 80 to 140 ° C. The resin is available from Nippon Polyurethane Industry Co., Ltd. under trade names such as “Nipporan 5199”, “Nipporan 5196”, “Nipporan 5230”.

Coating layer (structure)
The film thickness of the coating layer is preferably 0.02 to 0.1 mm, and more preferably 0.02 to 0.08 mm. Furthermore, it is preferable that the coating layer has an uneven surface (that is, embossed). When the surface is embossed, the liquid foundation is held in the depression on the surface, and by sliding the puffed fingertip on the skin, it is released little by little, and uniform application can be realized. . Here, FIG.3 and FIG.4 is the figure which showed the embossing example. In addition, not only the pattern shown in the figure but also a complicated figure such as a trademark, a design, a logo type, etc. can be transferred on the mold.

Coating layer (physical properties)
The coating layer preferably has a tensile strength of 30 MPa or more and an elongation of 300% or more. When the elongation is 30 MPa or more and the elongation is 300% or more, the gel material and the coating layer are not peeled off, and the gel material is not exposed or torn even if it is bent with a finger. Here, the measurement of the tensile properties is performed according to JIS K 7127 (test piece type: 1B, test speed: 200 mm / min). Moreover, for the preparation of the test piece, for example, the upper mold of the cavity type used in the examples is used.

  Having described in detail each element of the cosmetic puff according to the best mode, the cosmetic puff will be described next.

Cosmetic puff (structure)
The cosmetic puff according to the best mode is manufactured using a mold. Therefore, in the cosmetic puff according to the best mode, the seam is not conspicuous as compared with the cosmetic puff in which the gel material is injected and solidified and the opening is covered (for example, Patent Document 1). Furthermore, it is possible to make a seamless puff depending on the mold used. Furthermore, the puff according to the best mode is covered with the resin coating layer over the entire surface including the front and back sides. However, there may be a portion where the gel material is inevitably exposed for convenience of manufacturing, such as an inlet for the gel material when the mold is manufactured. Even in this case, the resin may be separately coated so as to close the injection port.

Cosmetic puff (use)
The cosmetic puff according to the best mode can be used for various cosmetics, and can be used for powders, creams, emulsion foundations, liquid foundations and the like. Here, the cosmetic puff according to the best mode is coated with a resin coating layer that does not soak the liquid inside, and the polyurethane gel inside is elastic like a finger. Especially suitable. Furthermore, the cosmetic puff according to the best mode has fewer (or no) seams than the conventional one, and even if there are seams, the adhesive force between the resin coating layer and the polyurethane gel is strong. Resistant to deformation. Therefore, it is possible to deal with any use mode that varies depending on individual users, such as applying a liquid foundation to the sharpened tip by bending the cosmetic puff. Furthermore, since the cosmetic puff according to the best mode can be used on both sides, it can be applied to a user who desires to use both sides of the cosmetic puff.

Cosmetic puff (manufacturing method)
Next, a method for producing a cosmetic puff according to the best mode will be described. First, this manufacturing method preferably includes a resin coating film forming step for forming a resin coating film on the inner wall of a mold, and a gel composition (for example, two-component polyurethane) in the resin coating film after the resin coating film forming step. A gel composition filling step for filling the liquid elastomer), a curing step for heating the mold filled with the gel composition to cure the gel composition (for example, a two-component polyurethane liquid elastomer), and demolding after the curing step And a demolding step for obtaining a cosmetic puff, and a shaping step for removing burrs and the like of the cosmetic puff immediately after demolding. Hereinafter, each of these steps will be described in detail.

  First, regarding the cavity mold, the resin coating film forming process is preferably a process of spraying a solution of a one-component polyurethane resin on the inner wall of the mold and then drying to remove the solvent. When a lower mold having a cavity and an upper mold that functions as a lid for the lower mold are used as the mold, a resin coating film is formed on both the lower mold and the upper mold. Moreover, when using a split mold, a resin coating is formed on the mold surface by rotating the mold and drying after introducing the resin solution from the opening. Here, the one-component urethane resin includes a polyisocyanate capped with a specific blocking agent (for example, alkylphenol) and a polyol. When this type of one-component urethane resin is dried at room temperature, the block bond is dissociated with the evaporation of the diluent, the urethane reaction by the polyol and isocyanate is promoted, and the resin is cured. Also, a known release agent is used to release the puff from the mold.

  Next, in the gel composition filling step, when a lower mold having a cavity and an upper mold that functions as a lid of the lower mold are used, the gel composition (for example, two liquids) is formed on the lower mold on which the resin coating film is formed. In the case where a split mold is used, a gel composition (for example, a two-component polyurethane liquid) is injected from the inlet with a resin coating film formed in the mold. This is a step of filling an elastomer). Here, when a two-component polyurethane liquid elastomer is used as the gel composition, there is an advantage that the hardness of the gel material after production can be easily controlled.

  Here, the gel composition may be in accordance with any one of the one-shot method and the prepolymer method. Hereinafter, the suitable aspect of the gel composition according to each method is explained in full detail.

(One-shot method)
First, in the one-shot method, all the raw materials (one or more polyols and one or more polyisocyanates) are mixed and stirred in the reactor at a time, and then cast, and the reaction is almost completed by primary curing. This is the most economical method since the raw material is used as it is by the method of molding and then secondary curing. Here, the polyol according to the best mode is not particularly limited as long as it is used in the production of ordinary polyurethane gels. For example, polyoxyalkylene glycol, relatively low molecular weight polyhydric alcohol, polyester polyol, polycarbonate Diol, polytetramethylene ether glycol and the like can be mentioned. Furthermore, a modified polyether polyol or polyester polyol, or a hydroxyl group-terminated urethane prepolymer synthesized by using a stoichiometric excess of hydroxyl group with respect to an isocyanate group can also be used. Polyethers and polyesters are suitable for achieving an appropriate hardness. In addition, the polyisocyanate according to the best mode is not particularly limited as long as it is used in the production of a normal polyurethane gel, and is aromatic, aliphatic, or aliphatic having two or more isocyanate groups in one molecule. Examples include cyclic polyisocyanates (for example, hexamethylene diisocyanate, ethylene diisocyanate, isophorone diisocyanate). Furthermore, modified isocyanates such as urethane-modified products, biuret-modified products, allophanate-modified products, carbodiimide-modified products, and isocyanurate-modified products of these polyisocyanates can also be used. These polyisocyanates may be used alone or in combination of two or more. A suitable polyisocyanate is hexamethylene diisocyanate (HDI) because of discoloration resistance and softness.

  Here, it is preferable that the polyol is sufficiently dehydrated by heating under reduced pressure to reduce the water content. Here, the water content of the polyol is preferably 0.05% by mass or less, more preferably 0.03% by mass or less, and particularly preferably 0.02% by mass or less. This process is the same in the prepolymer method described later.

  Next, after injecting a gel composition comprising a polyol and polyisocyanate mixed and defoamed in advance into a mold, the temperature is preferably 40 to 140 ° C, more preferably 50 to 120 ° C, and still more preferably 60 to 100 ° C. In the range, it is cured by heating for about 5 minutes to 4 hours.

  In addition, you may add well-known catalysts, such as a metal type and an amine type, at the time of manufacture of a polyurethane elastomer. The amount to be used is preferably 0.0001 parts by mass or more and 2.0 parts by mass or less, more preferably 0.001 parts by mass or more and 1.0 parts by mass or less with respect to 100 parts by mass of the polyol. In addition, the said matter is the same also in the prepolymer method mentioned later. Furthermore, the isocyanate index (ratio of isocyanato groups to hydroxy groups in the polyol) of the polyol and polyisocyanate in the one-shot method is preferably in the range of 0.8 to 1.25, more preferably 0.9 to 1 .1 or less, particularly preferably 0.94 or more and 1.08 or less.

(Prepolymer method)
Next, the prepolymer method is a two-stage method in which a part of a polyol is reacted in advance with a polyisocyanate to synthesize a prepolymer, and the prepolymer is reacted with the remaining polyol to finally form an elastomer. Take. In addition, as the prepolymer method, a method may be used in which a hydroxyl group-terminated prepolymer obtained by reacting a polyol and a part of polyisocyanate in advance is produced and the remaining polyisocyanate is reacted therewith. In the case of the prepolymer method, the heat associated with the urethanization reaction has already been released during the prepolymerization, so that the handling is easy.

  Usually, in the prepolymer method, a polyol and a polyisocyanate are stirred and mixed at a reaction temperature of 40 ° C. or higher and 150 ° C. or lower for about 30 seconds to 8 hours in the presence of an inert gas to produce a prepolymer. Next, the obtained prepolymer and the remaining polyol are weighed and mixed together. The isocyanate index of the prepolymer and the remaining polyol (ratio of isocyanate groups in the prepolymer to hydroxyl groups in the polyol) is preferably in the range of 0.8 to 1.25, more preferably 0.9 to 1. 1 or less, particularly preferably in the range of 0.94 to 1.08.

  Next, after pre-mixing and defoaming a gel composition comprising a prepolymer and a polyol into a mold, preferably 40 ° C. or higher and 280 ° C. or lower, more preferably 100 ° C. or higher and 270 ° C. or lower, particularly preferably 120 ° C. It is cured by heating at 260 ° C. or lower for about 0.5 minutes to 30 minutes.

<Example 1>
A cosmetic puff according to the example was manufactured using the mold shown in FIG. Here, in the figure, 1 is a molding die, 1a is a lower die, and 1b is an upper die.

  A product obtained by diluting 7 parts by mass of NIPPOLAN 5199 (trademark, manufactured by Nippon Polyurethane Industry) which is a non-yellowing polycarbonate diol-based coating agent (one-component urethane coating agent) with 18 parts by mass of a diluent containing propylene glycol monomethyl ether acetate, A stainless steel flat plate was spray coated with a spray gun (product number W-101-082P, manufactured by Anest Iwata Co., Ltd.) to a film thickness of 0.04 mm, and allowed to stand at room temperature (20 ° C.) for 15 minutes to dry. The flat plate with the coating layer 2b was used as the upper mold. Similarly, the coating layer 2a was also formed on the inner wall of the lower mold having cavities.

  100 parts by mass of polyether polyol (functional group number: 3, weight average molecular weight: 10,000, hydroxyl value: 17, ethylene oxide addition rate: 8%) and 0.3 part by mass of catalyst (dibutyltin dilaurate) in a predetermined container The container was placed in a vacuum dryer and degassed. And 9 mass parts of hexamethylene diisocyanate (HDI) was added to the liquid mixture of the said polyether polyol and a catalyst, and after stirring with the propeller mixer, it injected into the cavity type | mold. Thereafter, the upper mold was put on the lower mold and closed.

  Next, the mold was put into a heating furnace and cured at 70 ° C. for 1 hour. And the said shaping | molding die was taken out from the heating furnace, mold removal, trimming, and deburring were implemented, and the cosmetic puff which concerns on a present Example was obtained. The hardness of the obtained puff was F85 (Asuka Hardness Tester F, manufactured by Kobunshi Keiki Co., Ltd.). Moreover, the joint 2c was not conspicuous in appearance, and the puff was subjected to various deformations, but the exposure of the gel material 2 from the joint 2c was not confirmed. The NCO / OH value of the gel composition in this example was 0.85, the gel thickness was 6 mm, the coating layer thickness was 0.04 mm, and the tensile strength and elongation of the coating layer were 33 MPa and 330%. It was.

<Example 2>
The coating solution prepared in the same manner as in Example 1 was poured from the injection port into a mold mold that had been heated to 70 ° C. in advance, the injection port was closed once, the mold was rotated once, and then the injection port was opened again. The excess coating solution was removed and discharged from the inlet. Thereafter, the mixture was left at 70 ° C. for 20 minutes with the inlet opened. FIG. 3 is a cross-sectional view of the mold 3 used in this embodiment. In the figure, 3a is an upper mold, 3b is a lower mold, 3c is an inlet, and 3d is a parting line.

  Then, after mixing and stirring the raw materials in the same manner as in Example 1, the gel composition was injected from the injection port of the mold mold in which the coating film was formed, and the injection port was closed and heated at 70 ° C. for 1 hour. And cured. The mold was taken out from the heating furnace, demolded, and deburred at the inlet, and a cosmetic puff according to this example was obtained.

FIG. 1 is a cross-sectional view of a cosmetic puff according to the best mode and Example 1. FIG. FIG. 2 shows a cross-sectional view when filling and molding a cosmetic puff material into a cavity mold. FIG. 3 shows a cross-sectional view of the mold. FIG. 4 shows a surface view of the cosmetic puff according to the best mode to which the texture of the fingerprint pattern is transferred. FIG. 5 shows a surface view of the cosmetic puff according to the best mode in which an oblique lattice pattern is transferred to imitate human skin.

Explanation of symbols

1: Mold 1a: Lower mold 1b: Upper mold 1c: Parting line 2: Polyurethane gel 2a: Lower mold coating layer 2b: Upper mold coating layer 2c: Seam 3: Mold mold 3a: Upper mold 3b: Lower mold 3c: Inlet 3d: Parting line

Claims (11)

  A cosmetic puff manufactured using a mold and having a gel material and a resin coating layer covering the gel material, wherein a resin coating film is formed on the inner wall of the mold and the gel composition is formed in the resin coating film A cosmetic puff obtained by curing the gel composition in the mold in a state where is filled.   The cosmetic puff according to claim 1, wherein the resin coating layer is a polyurethane film.   The cosmetic puff according to claim 1 or 2, wherein the gel composition is a two-component polyurethane liquid elastomer.   The cosmetic puff according to any one of claims 1 to 3, wherein the gel material has a hardness of F50 to C30.   The cosmetic puff according to any one of claims 1 to 4, wherein the inner wall of the mold has a textured surface.   The cosmetic puff according to any one of claims 1 to 5, comprising two members, the gel material and the resin coating layer.   A method for producing a cosmetic puff having a gel material and a resin coating layer covering the surface thereof, wherein a resin coating film is formed on the inner wall of the mold and the gel composition is filled in the resin coating film The manufacturing method including the process of heating the said type | mold and hardening the said gel composition.   The manufacturing method according to claim 7, wherein the resin is a one-component polyurethane resin.   The production method according to claim 7 or 8, wherein the gel composition is a two-component polyurethane liquid elastomer.   Forming the resin coating film in a cavity that is a lower mold, casting the gel composition inside the coating film, and further including a step of closing the mold with an upper mold in which the resin coating film is formed in advance; The manufacturing method as described in any one of Claims 7-9.   Introducing the resin solution into the split mold through the injection port, rotating the split mold to apply the resin solution to the inner wall of the split mold, and drying the resin solution to form the resin coating film The manufacturing method as described in any one of Claims 7-9 further including the process to fill and the said gel composition from the said injection hole in the said split mold in which the said resin coating film was formed.

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