US20040166303A1 - Applicator for cosmetics - Google Patents

Applicator for cosmetics Download PDF

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Publication number
US20040166303A1
US20040166303A1 US10/786,216 US78621604A US2004166303A1 US 20040166303 A1 US20040166303 A1 US 20040166303A1 US 78621604 A US78621604 A US 78621604A US 2004166303 A1 US2004166303 A1 US 2004166303A1
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United States
Prior art keywords
heating
weight
parts
rubber
sponge
Prior art date
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Abandoned
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US10/786,216
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English (en)
Inventor
Yuichi Yamato
Kenji Kurisu
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Nishikawa Rubber Co Ltd
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Individual
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Filing date
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Assigned to NISHIKAWA RUBBER CO., LTD. reassignment NISHIKAWA RUBBER CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KURISU, KENJI, YAMATO, YUICHI
Publication of US20040166303A1 publication Critical patent/US20040166303A1/en
Priority to US12/229,844 priority Critical patent/US7704437B2/en
Abandoned legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D33/00—Containers or accessories specially adapted for handling powdery toiletry or cosmetic substances
    • A45D33/34—Powder-puffs, e.g. with installed container
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
    • E02B7/20—Movable barrages; Lock or dry-dock gates
    • E02B7/40—Swinging or turning gates
    • E02B7/44—Hinged-leaf gates
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D34/00—Containers or accessories specially adapted for handling liquid toiletry or cosmetic substances, e.g. perfumes
    • A45D34/04—Appliances specially adapted for applying liquid, e.g. using roller or ball
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/56—After-treatment of articles, e.g. for altering the shape
    • B29C44/5627—After-treatment of articles, e.g. for altering the shape by mechanical deformation, e.g. crushing, embossing, stretching
    • B29C44/5654—Subdividing foamed articles to obtain particular surface properties, e.g. on multiple modules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/91—Heating, e.g. for cross linking
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D2200/00—Details not otherwise provided for in A45D
    • A45D2200/10—Details of applicators
    • A45D2200/1009—Applicators comprising a pad, tissue, sponge, or the like
    • A45D2200/1018—Applicators comprising a pad, tissue, sponge, or the like comprising a pad, i.e. a cushion-like mass of soft material, with or without gripping means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0855—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using microwave
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0861—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using radio frequency
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0009—Cutting out
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0027—Cutting off
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0012—Combinations of extrusion moulding with other shaping operations combined with shaping by internal pressure generated in the material, e.g. foaming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2021/00—Use of unspecified rubbers as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • B29K2105/043—Skinned foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/718—Cosmetic equipment, e.g. hair dressing, shaving equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/74—Domestic articles
    • B29L2031/7406—Sponges; Cleaning equipment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]

Definitions

  • This invention relates to an applicator for cosmetics which is adapted for us3e in application of cosmetics or skin lotions to human skin surfaces.
  • an applicator for cosmetics used herein is intended to mean those instruments which are used for applying cosmetics or skin lotions to human skin surfaces, and include sponge puffs for cosmetics, eye shadow chips, putting sponges, applicators for rouge, applicators or brushes for cheek rouge and the like.
  • foamed rubber materials that are ordinarily used for this type of applicator, particularly, a sponge puff for cosmetic purposes, include acrylonitrile butadiene rubber (NBR), ethylene-propylene-diene terpolymers (EPDM), urethane rubbers, silicone rubbers and the like.
  • NBR acrylonitrile butadiene rubber
  • EPDM ethylene-propylene-diene terpolymers
  • urethane rubbers silicone rubbers and the like.
  • a latex foam puff which is obtained by mechanically foaming and vulcanizing a rubber latex composition.
  • This puff has the problem that that limitation is placed on an open-cell foam and a great number of cylindrical molds similar to a product shape are required.
  • Some closed-cell sponge puffs are also known, which are made of expanded materials obtained by adding a blowing agent and the like additives to a solid rubber, packing the mixture in a mold, and heating under pressure to obtain a sponge material.
  • the rubber sheet removed from the mold should be punched out in a form similar to an intended shape of product, with the attendant problems of a great loss of the material and poor productivity resulting from its batch process.
  • urethane sponge puffs are known in the art, wherein a solvent-containing urethane resin composition is extruded, and the solvent is evaporated off under reduced pressure to form cells therein. This process also has the problems that the material loss is great and a load on recovery of the solvent is serious.
  • the foundation that is a kind of cosmetic is classified into a powder type and a liquid type.
  • the powder foundation is one wherein pigments and the like are solidified with a paraffin oil or the like
  • the liquid foundation is a liquid one wherein solid matters such as pigments are dispersed in water or a silicone oil.
  • the sponge puff used for the powder foundation is made of an open-cell foam of NBR (nitrile rubber) or a urethane rubber.
  • NBR open-cell foam is one which is obtained by mechanically mixing air into a latex and foaming the mixture and whose foamed conditions are uniform throughout the resulting foam with a water absorption being at 500% or over.
  • Sponge puffs adapted for use in liquid foundations include those sponge puffs made of closed cells such as of silicone rubbers and EPDM (ethylene/propylene rubbers), sponge puffs wherein a skin film is applied onto open-cell sponges, and the like.
  • the closed-cell sponge puffs are those which are expanded under heat and pressurizing conditions with use of a press and are made of fine foams having a size of 100 ⁇ m or below and which cannot be manufactured in a sheet thickness of 30 mm or over because of application of heat from a hot press. Although the water absorption is less than 5%, this type of puff is not good, with respect to a feel to the touch, owing to the elastic feeling inherent to the closed cells. When this type of puff is applied for powder foundation, it is unlikely to cause a powder foundation to be appropriately deposited thereon due to the fineness of the cells and such a puff runs as sliding on the skin surface, thus being not suited for application to powder foundations in practice.
  • an applicator for cosmetics which comprises an applicator body obtained by subjecting a compounded rubber to extrusion molding in a given shape to provide a molded rubber, and heating a given shape of the molded rubber to cause vulcanization or crosslinkage therein, and punching and/or cutting the vulcanized or crosslinked rubber into pieces of a given shape.
  • the compounded rubber should be made of at least two types of compounded rubbers, which are extrusion molded into plural layers integrally combined together.
  • the compounded rubber set forth in the first and second embodiments is made mainly of a polymer having a polar group.
  • the polar group-bearing polymer set forth in the third embodiment consists of NBR wherein the content of acrylonitrile in the NBR polymer is not larger than 30%.
  • the compounded rubber is subjected to extrusion molding in a given shape and heated by irradiation with a micro wave in any one of the first to fourth embodiments.
  • the applicator set forth in any one of the first to fifth embodiments is a sponge puff for cosmetics.
  • the rubber composition using the polar group-bearing polymer as one of starting materials according to the third embodiment should preferably comprise: (A) 100 parts by weight of a polymer containing from 30 to 100 wt % of the polar group-bearing polymer; (B) 1 to 30 parts by weight of an organic blowing agent; and (C) 0.1 to 5 parts by weight of sulfur or/and 0.1 to 10 parts by weight of an organic peroxide, both serving as a crosslinking agent, wherein when the organic peroxide is used, the relation between decomposition temperature T 1 and one minute half life temperature T 2 is such that ⁇ 20° C. ⁇ (T 1 ⁇ T 2 ) ⁇ +30° C.
  • the polar group-bearing polymer in the polymer (A) should preferably be made of NBR.
  • the decomposition temperature T 1 of the organic blowing agent (B) should preferably be at 100 to 210° C.
  • the crosslinking agent is preferably made of an organic peroxide from the standpoint of its resistance to metal ions.
  • the one minute half time temperature T 2 is preferably at 100 to 210° C.
  • the polymer (A) contains 30 to 100 wt %, preferably from 50 to 100 wt %, of the polar group-bearing polymer based on the total amount of the polymer (A). If the amount is smaller than 30 wt %, satisfactory generation of heat with a micro wave cannot be obtained, not resulting in uniform and satisfactory degrees of expansion and crosslinkage. It will be noted that no limitation is placed on the types of polymers other than the polar group-bearing polymer.
  • the polar group-bearing polymer should be one having a polar group in the molecule.
  • the polar group include functional groups having an oxygen atom, a nitrogen atom or a sulfur atom, such as a cyano group, an amino group, a carboxyl group, an amido group, an acetyl group, an ester group, a sulfone group, a mercapto group and the like.
  • polymers having such polar groups mention is made, for example, of acrylonitrile-butadiene-styrene copolymers, acryl rubbers, ethylene-vinyl acetate copolymers, ethylene-acrylic acid copolymer, ethylene-acrylic ester copolymers, ethylene-methacrylic ester copolymers, fluorine rubbers and the like.
  • polar group-bearing polymers may be used in combination as a blend of two or more. Of these, NBR is preferred in view of the characteristic properties thereof such as great polarity, a good oil resistance, a good wear resistance and the like.
  • the organic blowing agent (B) is not critical and includes, for example, azodicarbonamide, 4,4′-oxybisbenzene-sulfonylhydrazide, dinitrosopentamethylenetetramine, p-toluenesulfonylhydrazide, p-toluenesulfonylaceonehydrazide, hydrazinecabonamide, azobisisobutyronitile and the like.
  • blowing activators such as lead and zinc compounds, urea, amine compounds and other types of basic compounds may be used in combination for the purpose of controlling the decomposition temperature of the organic blowing agent.
  • the organic blowing agents may be used as a blend of two or more, and may also be used in combination with inorganic blowing agents such as sodium bicarbonate, ammonium carbonate, ammonium bicarbonate and the like.
  • the content of the organic blowing agent (B) is within a range of 1 to 30 parts by weight per 100 parts by weight of the polymer (A). If the content of the organic blowing agent (B) is smaller than 1 part by weight, a satisfactory degree of foaming cannot be attained, resulting in a foam being hard without an intended degree of elasticity. On the contrary, when the content exceeds 30 parts by weight, foaming proceeds in excess with the likelihood that cracking takes place at the time of molding.
  • the decomposition temperature T 1 of an organic blowing agent should preferably range from 100 to 210° C. When the temperature is lower than 100° C., there arise a problem on the stability during the course of foaming, and over 210° C., a uniform and satisfactory degree of foaming is unlikely to obtain.
  • the organic peroxide (C) is not critical in type and includes, for example, stearoyl peroxide, lauroyl peroxide, benzoyl peroxide, 4-methylbenzoyl peroxide, 1,1-)bis(t-butylperoxy)-2-methylcyclohexane, 1,1-bis(t-hexylperoxy)-3,3,5-trimethylcyclohexane, 1,1-bis(t-hexylperoxy)cyclohexane, 1,1-bis(t-butylperoxy)-3,3,5-trimethylcyclohexane, 1,1-bis(t-butylperoxy)cyclohexane, t-hexylperoxyisopropyl monocarbonate, t-butylperoxymaleic acid, t-butylperoxy laurate, t-butylperoxyisopropyl monocarbonate, t-butylperoxy-2-ethylhexyl
  • the content of the organic peroxide is in the range of from 0.1 to 10 parts by weight per 100 parts by weight of the polymer (A). If the content of the organic peroxide (c) is less than 0.1 part by weight, a satisfactory degree of crosslinkage cannot be obtained, resulting in inferior elasticity and poor product characteristics such as physical strength and the like. On the other hand, if the content exceeds 10 parts by weight, crosslinkage proceeds in excess, with the possibility of causing cracks to occur in the course of molding.
  • the one minute half time temperature T 2 should preferably range from 100 to 210° C. When the temperature is lower than 100° C., there arises a problem on stability at the time of molding, and if the temperature exceeds 210° C., it is unlikely to obtain satisfactory degrees of foaming and crosslinkage throughout a product.
  • Examples of the inorganic filler include calcium carbonate, magnesium carbonate, alumina, aluminium hydroxide, magnesium hydroxide, mica, xonotlite, precipitated barium sulfate and the like.
  • the average particle size of these fillers should preferably be 10 ⁇ m or below in order to obtain homogeneous foaming.
  • a preferable foaming method is such that a rubber composition is extrusion molded in a given form, followed by heating and crosslinkage. Heating is feasible by any of a method of circulating hot air or continuously passing through a heating furnace provided with infrared heaters, a method of passing through a bath filled with a molten salt or heated glass beads and the like.
  • a crosslinking and expansion or foaming method is used wherein an extruded rubber composition is heated from inside by irradiation with a microwave.
  • heating may be carried out by a combination of plural methods mentioned above.
  • the method of making a cosmetic applicator there is provided a method wherein at least two rubber formulations are extrusion molded into plural layers and heated to cause an extruded product to be crosslinked and foamed.
  • the plural rubber compositions may be made of a combination of expandable rubber compositions or a combination with an ordinary non-expandable rubber composition.
  • a thermoplastic elastomer may be chosen for the non-expandable rubber composition.
  • a rubber composition is extrusion molded in a given form and heated and crosslinked to provide a open-cell foam, followed by punching or/and cutting into a desired form, thereby obtaining a shaped rubber foam.
  • extrusion molding is performed to provide such a large-sized section that a continuously moldable extrusion section is used as a main surface, followed by punching or/and cutting, it becomes possible to efficiently make an applicator for cosmetics.
  • a fundamental shape can be readily changed without use of a great number of molds although bases or caps of irregular shapes are changed.
  • materials for multiple layers having designing properties can be simultaneously formed.
  • foam structures closed cells, semi-closed cells and open cells
  • the diameter of foams and the hardness which are suited for the type of cosmetic, depending on the variations of formulating and molding conditions.
  • the selection in type of olefinic elastomer enables one to improve the surface quality by use of melt bonding of a spherical resin having similar characteristics.
  • a compounded rubber can be uniformly heated not only at the surface portion, but also the central portion thereof, thereby obtaining a foam whose cells are uniformly dispersed even at a large section.
  • the resulting foam is passed through press rolls so that closed cells are partly communicated with each other, thereby improving a feeling to the touch.
  • the applicator set forth in the first embodiment is obtained by providing an NBR polymer, an organic peroxide and a blowing agent, adding 1 part by weight to 100 parts by weight of a synthetic silicic acid serving as a reinforcing filler to 100 parts by weight of the NBR polymer, heating the compounded rubber as a whole by use of HA heating and UHF heating in combination to cause vulcanization and expansion thereby providing a thick sponge having a homogenous foam structure, passing through press rolls, and cutting the resulting sheet stock into pieces of a desired form.
  • the applicator set forth in the first embodiment is obtained by providing an NBR polymer, an organic peroxide and a blowing agent, adding 10 parts by weight to 200 parts by weight of precipitated calcium carbonate having a prismatic particle shape and a serving as a filler to 100 parts by weight of the NBR polymer, heating the compounded rubber as a whole by use of HA heating and UHF heating in combination to cause vulcanization and expansion thereby providing a thick sponge having a homogenous cell structure, passing through press rolls, and cutting the resulting sheet stock into pieces of a desired form.
  • the applicator set forth in the first embodiment is obtained by providing an NBR polymer, an organic peroxide and a blowing agent, adding 1 part by weight to 100 parts by weight of a synthetic silicic acid serving as a reinforcing filler and 10 parts by weight to 200 parts by weight of precipitated calcium carbonate having a prismatic particle shape and a serving as a filler, each per 100 parts by weight of the NBR polymer, heating the compounded rubber as a whole by use of HA heating and UHF heating in combination to cause vulcanization and expansion thereby providing a thick sponge having a homogenous cell structure, passing through press rolls, and cutting the resulting sheet stock into pieces of a desired form.
  • the applicator set forth in any of the embodiments 7 to 9 the applicator consists of a sponge puff for cosmetics.
  • NBR having a swelling resistance against both powder foundation and liquid foundation is used as a base material.
  • millable NBR is used, which is capable of forming a sponge, which is more porous than an expanded closed cell sponge rubber sheet, by incorporating therein crosslinking agent and a blowing agent beforehand, and heating the resulting composition to cause crosslinkage and expansion at the same time.
  • the rubber is passed through press rolls.
  • the formation of open cells and closed cells can be arbitrarily controlled by controlling how to pass through press rolls.
  • the addition of a synthetic silicic acid within a range of from 1 part by weight to 100 parts by weight per 100 parts by weight of NBR permits easy passage through press rolls.
  • UHF ultra high frequency: microwave
  • HA hot air
  • the rubber composition undergoes a uniform heat history throughout the composition, thereby enabling one to form a thick sponge sheet having a uniform foam structure as a whole.
  • EPDM ethylene propylene rubber
  • silicone rubbers and the like are unlikely to be heated through UHF as providing a white or color product
  • the heating through UHF has been found possible when using NBR.
  • a compounded rubber should be preformed by extrusion, thereby providing a uniform internal condition (without inclusion of air in the inside thereof).
  • a preferred amount of a synthetic silicic acid from the standpoint of further improving passage through press rolls and imparting an appropriate degree of hardness to the applicator ranges from 3 to 10 parts by weight.
  • the synthetic silicic acids are illustrated below.
  • the synthetic silicic acids include synthetic silicic acids and synthetic silicates.
  • the synthetic silicic acid also includes anhydrous silicic acid and hydrous silicic acid.
  • the synthetic silicates include hydrous calcium silicate and hydrous aluminium silicate.
  • any synthetic silicic acids may be used irrespective of the shape or form of particles and whether it is anhydrous or hydrous, and in view of the ease in economic availability, hydrous silicic acid is preferred. Mention is made, as an instance of hydrous silicic acid, of Nipsil VN3 set out in examples appearing hereinafter.
  • Precipitated calcium carbonate having a prismatic particle shape is illustrated below.
  • Precipitated calcium carbonate includes ground calcium carbonate and precipitated calcium carbonate.
  • the precipitated calcium carbonate includes those having a prismatic particle shape and a spindle shape, respectively.
  • ground calcium carbonate or precipitated calcium carbonate having a spindle-shaped particle form is added to NBR as a filler, the degree of homogeneity of cells becomes poor.
  • precipitated calcium carbonate having a prismatic particle form is added, the degree of homogeneity of cells is good.
  • An instance of ground calcium carbonate mention is made of “Novelight A”.
  • An instance of precipitated calcium carbonate having spindle-shaped particle form includes “Hakuenka CC”.
  • an instance of precipitated calcium carbonate having a prismatic particle form includes “Tamapearl TP-123”.
  • precipitated calcium carbonate having a prismatic particle form should preferably have an average size of 0.1 to 0.3 ⁇ m.
  • the applicators for cosmetic according to the seventh, ninth and tenth embodiments are those which are obtained by providing an NBR polymer, an organic peroxide, and a blowing agent, adding from 1 part by weight to 100 parts by weight of a synthetic silicic acid per 100 parts by weight of the NBR polymer, heating the compounded rubber as a whole through a combination of HA heating and UHF heating to cause vulcanization and expansion thereby obtaining a thick sponge sheet of a homogeneous cell state, passing through press rolls and cutting the resulting sheet stock into pieces.
  • the articles obtained according to the seventh to tenth embodiments of the invention are applicators for cosmetics which are obtained by providing a NBR polymer, an organic peroxide and a blowing agent, adding 1 part by weight to 100 parts by weight of a synthetic silicic acid serving as a reinforcing filler or/and 10 parts by weight to 200 parts by weight of precipitated calcium carbonate having a prismatic particle form and serving as a filler, both per 100 parts by weight of the NBR polymer, heating the resulting compounded rubber as a whole through a combination of HA heating and UHF heating to cause vulcanization and expansion to process thereby obtaining a thick sponge sheet of a homogeneous cell state, passing the sheet through press rolls and cutting the resulting sheet stock into pieces.
  • the applicator has a cell structure (water absorption of 5% to 500%) that is intermediate between the closed cell and open cell and is unlikely to be soaked with a liquid and is kept with a good feel to the touch.
  • the articles obtained according to the seventh to tenth embodiments of the invention have more coarse cells (with a cell size larger than 100 ⁇ m) than a closed-cell applicator (i.e. cell sheet) and are suited to make a thick sponge sheet (30 mm or over) having cells that are substantially uniform.
  • FIG. 1 is a side view showing an apparatus of making a rubber foam material according to first to sixth embodiments of the invention
  • FIGS. 2A and 2B are, respectively, an front view and a side view, both showing an example of an extruded material used in FIG. 1;
  • FIGS. 3A and 3B are, respectively, a front view and a side view, both showing another example of an extruded material used in FIG. 1;
  • FIGS. 4A and 4B are, respectively, a plan view and a front view, both showing a further example of an extruded material used in FIG. 1;
  • FIG. 5 is a front view showing an example of manufacturing a sponge puff according to first, and seventh to tenth embodiments of the invention.
  • FIGS. 6A and 6B are, respectively, a front view and a side view, both showing an example of a puff obtained from a sheet stock in FIG. 5;
  • FIGS. 7A, 7B and 7 C are, respectively, schematic views showing a sponge puff of FIG. 6 with different degrees of cell homogeneity.
  • FIGS. 1A, 1B to 4 A, 4 B show first to sixth embodiments of the invention.
  • indicated by 5 is a continuous extruder and by 6 is a crosslinking device for carrying out heating and vulcanization.
  • Indicated by 8 is a cutting or punching machine, by 1 is a compounded rubber, by 1 a is an extruding material, and by 1 b is a vulcanized, expanded rubber foam.
  • a plurality of stock materials 2 , 3 may be co-extruded. If a single material is used, a product 4 a results. The use of a plurality of stock materials 2 , 3 results in a product 4 b.
  • FIGS. 5 to 7 show first and seventh to tenth embodiments of the invention.
  • indicated by 5 is a continuous extruder
  • 6 a is HA
  • 6 b is UHF
  • 7 a to 7 e are press rolls, respectively
  • by 8 is a cutting or punching machine.
  • the compounded rubber 1 is extruded by means of the continuous extruder 5 to provide an extruded material la.
  • This material is heated externally with HA 6 a and internally with UHF 6 b to provide the vulcanized, expanded rubber 1 b , followed by pressing with the press rolls 7 a to 7 c .
  • the resulting sheet stock is cut by means of the cutting or punching machine 8 to obtain the sponge puff 4 c.
  • NBR polymers used in the examples are particularly shown in Table 1 below with respect to the product name, content of acrylonitrile (%), and color tone of vulcanized or crosslinked products in relation to the content TABLE 1 Name of Content of Product Manufacturer Acrylonitrile ⁇ E Color Tone N220S JSR Co., Ltd. 41 13.18 brown N230S JSR Co., Ltd. 35 6.37 yellowish brown N240S JSR Co., Ltd. 26 1.35 cream color N250S JSR Co., Ltd. 20 0 cream color
  • the resultant NBR has a low oil resistance and is thus not favorable for practical use as an applicator for cosmetics.
  • the content of acrylonitrile in NBR polymer should preferably be in the range of 5% to 30%. Within this range, the oil resistance is at a level sufficient to present little problem on practical applications, and the vulcanized or crosslinked product assumes a whitish color such as a cream color and is beautiful to eyes on its own. Of course, when pigments are added for coloration, the resulting color can seemingly be fine.
  • Heating time 3.5 minutes
  • Foamed product size 70 ⁇ 45 ⁇ 230
  • Each vulcanized sponge rubber rod body was passed n times through biaxial rolls having a clearance of 3 mm to allow uniform passage throughout the body thereby providing a sponge rubber sheet stock.
  • the roll pass sufficiency for a sample subjected to 1 to 15 roll passes is indicated as “0”
  • the sufficiency for a sample subjected to 15 to 30 passes is indicated as “ ⁇ ”
  • the occurrence of a phenomenon such as breakage of a sample sheet, i.e. impracticability of roll pass is indicated as “x”.
  • the homogeneity of cells is determined such that when a sponge rubber sample of each of the examples and comparative examples was observed through an electronic microscope, those samples having a cell diameter of 300 ⁇ m at the central portion thereof and a cell diameter of 500 ⁇ m at the outer periphery thereof are indicated as “ ⁇ ” (FIG. 7(A)). With the symbol “ ⁇ ”, the diameters of substantially all of cells existing in a sample are within a range of three times an average cell diameter and thus, the sample is most suited for cosmetic service.

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  • Engineering & Computer Science (AREA)
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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structural Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
US10/786,216 2003-02-26 2004-02-25 Applicator for cosmetics Abandoned US20040166303A1 (en)

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JP2003048851 2003-02-26
JP2003-048851 2003-02-26
JP2003084614 2003-03-26
JP2003-084614 2003-03-26
JP2003-426657 2003-12-24
JP2003426657A JP2004275743A (ja) 2003-02-26 2003-12-24 化粧用塗布具
JP2003-430054 2003-12-25
JP2003430054A JP4163100B2 (ja) 2003-02-26 2003-12-25 化粧用塗布具

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CN100391382C (zh) * 2004-09-23 2008-06-04 许智浚 一种多色粉扑的制造方法
JP4799896B2 (ja) * 2005-04-12 2011-10-26 西川ゴム工業株式会社 化粧用スポンジパフ
JP5172221B2 (ja) * 2006-07-07 2013-03-27 西川ゴム工業株式会社 化粧用スポンジパフの製造方法
JP5176138B2 (ja) * 2008-04-08 2013-04-03 西川ゴム工業株式会社 スポンジゴム
JP4523984B2 (ja) * 2008-11-13 2010-08-11 大王製紙株式会社 耐溶剤性に優れた塗工紙
JP5559572B2 (ja) * 2010-03-08 2014-07-23 タイガースポリマー株式会社 粘土状造形材料およびその架橋方法
JP4872016B1 (ja) * 2010-10-20 2012-02-08 株式会社イノアック技術研究所 化粧用塗布具
JP6372932B2 (ja) * 2014-01-09 2018-08-15 株式会社タイキ ゴムラテックス弾性発泡体
JP6674455B2 (ja) * 2014-10-22 2020-04-01 アモーレパシフィック コーポレーションＡｍｏｒｅｐａｃｉｆｉｃ Ｃｏｒｐｏｒａｔｉｏｎ ラテックス発泡フォームを含む化粧料組成物担体
KR101882197B1 (ko) * 2014-12-22 2018-07-26 (주)에스엔피월드 겔상 화장료 조성물의 함침용 NBR(nitrile butadiene rubber) 스폰지 및 그의 제조방법
KR102323103B1 (ko) * 2015-04-30 2021-11-10 (주)아모레퍼시픽 내용물 전달력이 개선된 도포구
CN108276623A (zh) * 2018-02-28 2018-07-13 江门球牌化妆用品有限公司 一种nbr材料气垫海绵及其制造方法
CN108864489A (zh) * 2018-08-21 2018-11-23 珠海水丝新材料有限公司 一种网格状加强凝胶海绵膜体的制作方法

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US7704437B2 (en) 2010-04-27
KR20040076801A (ko) 2004-09-03
JP2004275743A (ja) 2004-10-07
KR101099346B1 (ko) 2011-12-26
FR2851432A1 (fr) 2004-08-27
CN1524473A (zh) 2004-09-01
JP4163100B2 (ja) 2008-10-08
FR2851432B1 (fr) 2007-04-27
US20090008829A1 (en) 2009-01-08
JP2004305715A (ja) 2004-11-04

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