Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
  • A61K8/0208—Tissues; Wipes; Patches
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
  • A61K8/81—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
  • A61K8/8105—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
  • A61K8/8111—Homopolymers or copolymers of aliphatic olefines, e.g. polyethylene, polyisobutene; Compositions of derivatives of such polymers
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/92—Oils, fats or waxes; Derivatives thereof, e.g. hydrogenation products thereof
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q19/00—Preparations for care of the skin
  • A61Q19/10—Washing or bathing preparations

Definitions

• This invention relates to oil absorbent skin wipe products.
• the invention particularly relates to oil absorbent skin wiping products with an oil absorption indication function.
• Conventional paper type wipes have been used to remove facial oil.
• natural or synthetic papers using vegetable fibers, synthetic pulp or kenaf have been used.
• Japanese Kokai No. 4-45591 which teaches adhering porous spherical beads onto the surface of an oil absorbing paper so as to solve the problems caused by calendering or coating of paper with powders such as calcium carbonate powders. These beads also are used to allegedly increase the capacity of the papers to absorb sebum.
• Japanese Unexamined Patent Publication (Kokai) No. 6-319664 discloses a high-density oil absorbing paper produced by mixing (a) a pulp material containing vegetable fibers, as the main component with (b) an inorganic filler, followed by paper-making to form a paper with a basis weight of 0.7 g/cm 2 or more.
• an oil absorbing synthetic paper comprising an oil absorbing paper with a smooth surface coating of inorganic or organic powder material such as clay particles, silica fine-particles, and powdered fibers.
• oil-absorbing papers allegedly have some oil indicating effect by clarifying the paper upon oil absorption thus confirming oil absorption.
• the powder coating lowers the oil absorption capacity for these papers and it is still difficult to attain a clear change in the appearance of this type of oil clearing paper after oil absorption.
• Japanese Unexamined Patent Publication (Kokai) No. 9-335451 discloses an oil wipe made of a porous thermoplastic film.
• This oil absorbing wipe film has higher oil absorption capacity than the oil absorbing papers and is also superior in confirming removal of oil following wiping as compared to oil absorbing papers. It is believed that the reason for this good oil removal indicating functionality is that these porous thermoplastic films exhibit low light transmittance before oil absorption because of irregular reflection of light, but the light transmittance increases substantially after the micro-pores of the film are filled with oils producing a large change in the film's opacity or light transmittance, and therefore appearance. This change in opacity clearly confirms to the user the removal of oil or sebum from his or her skin. Further, unlike the paper products, these film based wipes are soft, comfortable, smooth and nonirritating to the skin.
• US Patent Application 2004/0121 142 describes an oil absorbing wipe having a clear oil indicating function such as described in WO99/29220, which product can readily crumple for disposability and is easy to manufacture, however this was obtained by utilizing high concentrations of a liquid diluent, namely mineral oil, which tended to make the wipe tacky and difficult to dispense from a package of wipes.
• a liquid diluent namely mineral oil
• the invention is directed to oil absorbing wipe materials suitable for wiping a users' skin or hair.
• the wipes comprise at least an oil absorbing porous coextruded film of a crystalline thermoplastic material with a solid diluent containing a crumpable layer and a generally nontacky layer.
• the wipe changes transparency or color when loaded with oil to provide an oil absorption indication functionality.
• the wipe is capable of forming a compact ball by crumpling to a diameter of 3.0 cm or less.
• Figure 1 is a diagrammatical view of an apparatus that may be used in the process of the invention to produce a microporous film according to the invention.
• Figure 2 is a perspective view of a dispensable package of oil absorbing wipes.
• the invention is generally directed at oil absorbing wipes capable of being dispensed and a dispensable package of oil absorbing wipes of a thermoplastic microporous material.
• the individual wipes are in the package in a stacked arrangement.
• stacked it is meant that a face of one wipe will be over all of one face, or a substantial portion of that face, in continuous contact with all, or a substantial portion, of a face of an adjacent wipe in the package.
• the package will contain at least 2 or more individual wipes, preferably 10 to 1000.
• the dispensable package 40 contains an access opening 52, which permits a user to grasp an individual wipe and withdraw it from the package 40 for use.
• the access opening 52 is at its largest dimension, smaller than the largest length or width dimension of the dispensable oil absorbing wipe material or wipe.
• the oil absorbent wipe is a microporous stretched or oriented coextruded film made of two of more microporous layers of thermoplastic material and a miscible diluent.
• the microporous thermoplastic material can be coated on at least a portion of one face with an active agent.
• the wipe whether used as is or with a coating, is preferably in a dry state, not wet, when used.
• the coextruded wipe film has a crumpable microporous film layer formed from a solid diluent, and at least one generally nontacky outer layer generally formed using a liquid diluent.
• the porosity of the interstitial volume per unit area of the microporous film material layers is preferably in the range of 0.0001-0.005 cm 3 as calculated by the equation:
• Interstitial volume per unit area
• the "void content” is more specifically defined as the percentage of an amount of filling material, when all of the voids of the microporous film are filled with a material of the same composition as the film, with respect to a film with no corresponding voids.
• the void content of the microporous film is preferably in the range of 5-50% and the thickness is preferably in the range of 5-200 ⁇ m.
• thermoplastic polymer refers to conventional polymers that are melt processable under ordinary melt processing conditions.
• thermoplastic polymer is not intended to include polymers that may be thermoplastic but are rendered melt processable only under extreme conditions.
• liquid refers to a material that (1) is mixable with a polymeric material, (2) is able to form a solution with a polymeric material when the mixture is heated above the melt temperature of the polymeric material, and (3) phase separates from that solution when the solution is cooled below the crystallization temperature of the polymeric material.
• solid diluent refers to a diluent that is solid at room temperature, and solid up to at least about 50 0 C. That is, the melting temperature of the diluent is above 50 0 C, and preferably above 60 0 C.
• the oil absorbent wipes are particularly useful as cosmetic wipes as after absorbing skin oil at the levels excreted from common sebaceous glands, they will turn translucent, thus indicating that the undesirable oil has been removed and that makeup or other skin treatments can be applied.
• the oil absorbing wipe is generally used as a single layer of the microporous coextruded film material but could be laminated to fibrous web materials, or the like.
• safe and effective amount means an amount of an active ingredient high enough to modify the conditions to be treated or to deliver the desired skin benefit, but low enough to avoid serious side effects, at a reasonable benefit to risk ratio within the scope of sound medical judgment. What is a safe and effective amount of the active ingredient will vary with the specific active ingredient, the ability of the active ingredient to penetrate through the skin, the age, health condition, and skin condition of the user, and other like factors.
• Porosity (1 - (bulk density/composite density)) x 100.
• COF kinetic coefficient of friction
• PETROTHENE 51 S07A: Polypropylene homopolymer, 0.8 g/min MFI (ASTM D1238,
• MILLAD 3988 Nucleating agent, 3,4-dimethylbenzyl idine sorbitol, (Milliken Chemical Co., Inman, SC), (available as a 2.5% concentrate in polypropylene as PPA0642495 from Clariant Corp., Minneapolis, MN)
• POLYWAX 400 synthetic polyethylene wax, 450 MW, 81 0 C melting point, (Baker Petrol ite, Sugar Land, TX)
• IGI 1231 refined paraffin wax, 53 0 C melting point, (The International Group, Wayne, PA)
• a single layer microporous film was prepared similar to that described in PCT application WO99/29220 Example 1, having the following composition: polypropylene (64%, PETROTHENE 51 S07A), mineral oil (35%, white oil #31, Amoco Oil and
• a three layer A-B-A coextruded microporous film was prepared by using two extruders to provide three melt streams.
• a 40 mm twin screw extruder was used to supply the B (core) layer consisting of a blend of PETROTHENE 51S07A polypropylene (61.5%), W-835 microcrystalline wax (37.5%) and 1.0% phthalo blue pigment concentrate.
• the polypropylene was fed into the hopper of a 40mm twin-screw extruder.
• the wax solid diluent was melted and pumped through a mass flowmeter and then introduced into the extruder through an injection port at a rate to provide a composition of
• the composition was rapidly heated to 249 0 C in the extruder to melt the components after which the temperature was cooled down to and maintained at 193 0 C through the remainder of the barrel.
• the molten composition was pumped from the extruder, through a filter, into a melt pump with a flow rate of 3.6 kg/hr and then via a necktube into an ABA three layer feedblock and then into a coat hanger slit die.
• a 25 mm twin screw extruder was used to supply the two A (skin) layers consisting of a blend of PETROTHENE 51S07A polypropylene (65.0%), white #31 mineral oil (35.0%), and 0.065% MILLAD 3988 nucleating agent.
• the polypropylene was fed into the hopper of a 25mm twin-screw extruder.
• the mineral oil liquid diluent was pumped through a volumetric flowmeter and then introduced into the extruder through an injection port at a rate to provide a composition of 65.0% by weight of the polypropylene and 35.0% by weight mineral oil liquid diluent.
• the composition was rapidly heated to 271 0 C in the extruder to melt the components after which the temperature was cooled down to and maintained at 193 0 C through the remainder of the barrel.
• the molten composition was pumped from the extruder, through a filter, into a melt pump with a flow rate of 5.4 kg/hr and then via a necktube into an ABA three layer feedblock and then into a coat hanger slit die.
• the relative distribution of the three layers was approximately 30/40/30.
• the three layer melt curtain was then cast onto a chrome roll (6O 0 C) running at 6.1 meters/min.
• the chrome roll had a knurled pattern on it consisting of 40 raised truncated pyramids per centimeter both axially and radially.
• the cast film was then stretched in-line with a stretching ratio of 1.8 to 1 in the machine direction using a Killion length orienter with the final roll of the preheat section set at 52 0 C, and a stretching ratio of 1.6 to 1 in the transverse direction using a Cellier tenter having zone temperature settings of 74 0 C in all zones to form an opaque light blue microporous film having a thickness of 43 microns, a porosity of 32.9%, a pore size of 0.29 microns and a Gurley airflow of 188 sec/50cc.
• a three layer microporous film was prepared as in Example 1 except IGI 1231 paraffin wax was used as the solid diluent at 35% of the film core layer. Flow rates of 4.5 kg/hr and 5.4 kg/hr were used for the core and skin layers respectively. Phthalo blue pigment concentrate was used at a 1.0% loading in place of the MILLAD 3988 in the skin layers. The relative distribution of the three layers was approximately 27/46/27. The temperature of the chrome roll was maintained at 66 0 C. A linespeed of approximately 6.9 meters/min was used.
• the cast film was then stretched in-line with a stretching ratio of 1.8 to 1 in the machine direction using a Killion length orienter with the final roll of the preheat section set at 6O 0 C, and a stretching ratio of 1.7 to 1 in the transverse direction using a Cellier tenter having zone temperature settings of 6O 0 C in zones 1-6 and 82 0 C in heat setting zones 7-8, to form an opaque blue microporous film having a thickness of 43 microns, a porosity of 36.2%, a pore size of 0.1 1 microns and a Gurley airflow of 849 sec/50cc.
• a three layer microporous film was prepared as in Example 2 except POLYWAX 400 synthetic polyethylene wax was used as the solid diluent at 35% of the film core layer. Flow rates of 3.6 kg/hr and 5.4 kg/hr were used for the core and skin layers respectively.

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• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Birds (AREA)
• Epidemiology (AREA)
• Engineering & Computer Science (AREA)
• Biomedical Technology (AREA)
• Chemical & Material Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Dermatology (AREA)
• Laminated Bodies (AREA)
• Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
• Cosmetics (AREA)
• Absorbent Articles And Supports Therefor (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

Country Status (10)

Cited By (1)

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Citations (7)

Family Cites Families (18)

• 2004
  • 2004-12-30 US US11/026,853 patent/US20060147503A1/en not_active Abandoned
• 2005
  • 2005-12-21 MX MX2007007930A patent/MX2007007930A/es not_active Application Discontinuation
  • 2005-12-21 CA CA002591896A patent/CA2591896A1/en not_active Abandoned
  • 2005-12-21 WO PCT/US2005/046517 patent/WO2006073853A1/en not_active Ceased
  • 2005-12-21 EP EP05855128A patent/EP1830792A1/en not_active Withdrawn
  • 2005-12-21 JP JP2007549488A patent/JP2008526309A/ja not_active Withdrawn
  • 2005-12-21 CN CNA2005800456827A patent/CN101094644A/zh active Pending
  • 2005-12-21 KR KR1020077017654A patent/KR20070110012A/ko not_active Withdrawn
  • 2005-12-29 AR ARP050105619A patent/AR052857A1/es not_active Application Discontinuation
  • 2005-12-29 TW TW094147312A patent/TW200637577A/zh unknown

Patent Citations (7)

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