FR2490470A1 - SHEATH PENCIL IN PLASTIC MATERIAL, IN PARTICULAR MAKE-UP PENCIL, AND MANUFACTURING METHOD THEREOF - Google Patents

Abstract

PLASTIC SHEATH PENCIL USABLE IN PARTICULAR AS A MAKE-UP PENCIL. THE PENCIL ACCORDING TO THE INVENTION CONTAINS A MINE 2 OF ACTIVE PRODUCT, FOR EXAMPLE OF A COSMETIC PRODUCT, AND IT IS CHARACTERIZED BY THE FACT THAT THE SHEATH 3 IS IN AN EXPANDED THERMOPLASTIC MATERIAL COMPATIBLE WITH THE SOLVENTS OR PRODUCTS ENTERING THE COMPOSITION OF THE MINE , SUCH A SHEATH WITH A WATERPROOF EXTERIOR COVERING 4.

Description

2 2490470

SHEATH PENCIL IN PLASTIC MATERIAL

  It is known that many active products in solid or pasty state can be packaged in the form of pencils which allow easy application and which also have the advantage of being able to be sharpened, for example to

  using a pencil sharpener when the tip is dull.

  This is, for example, the case of makeup products such as

  eyeshadows or eyebrows.

  It has already been proposed to replace a sheath made of

  IO plastic third with the traditional wooden sheath in which the mine of active product is placed. In this regard, reference can be made to French patent application N '76-22856 filed

  in the name of the plaintiff. The plastic sheath pre-

  feels a particular interest in certain uses, no-

  I5 especially in cosmetics: if the mine has a pale character

  teux, it is essential that the sheath can be cut easily, which is not always the case with wooden sheaths

  which may have more resistant zones due to the existence

  tence of a knot. In addition, the lead of a makeup pencil can, for manufacturing convenience, be directly extruded into a plastic sheath, while the

  making a wooden sheath make-up pencil

  generally kills by joining edge to edge two elements of semi-circular section around a rod of preformed product, then by gluing of the two elements assembled to

  constitute the wooden sheath. It follows a greater fa-

  manufacturing capacity and therefore a lower cost price

  make-up pencil with plastic sheath opposite

  screws from the same wooden sheath pencil.

  However, the use of this plastic sheath has certain drawbacks: during the in situ casting of the active product inside the sheath, there is generally a shrinkage of the product when it hardens, so that the Mechanical connection between the molded mine and its plastic sheath can sometimes leave something to be desired. In addition, it is planned to improve the aesthetics of the pencils, to apply layers of paint to them, but these can be attacked by the solvents which are contained in the mine and which can migrate through

sheath.

  The object of the present invention is to remedy the

  above, and to this end, it intends to

  read pencils whose sheath is made of an expanded thermoplastic material which has roughness allowing effective attachment of the lead inside the pencil.

  To compensate for the external roughness of the sheath and

  rer better sealing of the pencil to interior solvents, we also provide an impermeable exterior coating. In a first variant, the impermeable coating is obtained by co-extruding a layer of plastic material, preferably

  colored in the mass, with the sheath in thermoplastic material

  that expanded. In a second variant, the exterior coating

  laughter is formed by at least one waterproof film applied to a primary layer of adhesive, the latter being of

  I5 preferably extruded at the same time as the underlying sheath.

  In this variant, it is particularly interesting to

  seal the primary layer of adhesive with two transparent films

  overlapping relatives, if one wishes to wear inscriptions or a metallic or guilloche decoration on the pencil. Indeed, the metallized coating and / or the inscriptions which are arranged on one of the two films are sandwiched between these two films, so that they are protected both inwardly from towards solvents or greases which can attack them and towards the outside with regard to scratches,

  friction, dirt, etc ...

  The subject of the present invention is therefore the new industrial product which constitutes a pencil containing a mine of active product, for example of edible product, which is surrounded by a plastic sheath, characterized in that the sheath is made of a material expanded thermoplastic,

  compatible with solvents or products entering the com-

  position of the mine, and likely to be cut at the time

  sharpening the pencil, said sheath being provided with a coating

  outer impermeable to said solvents.

  In a preferred embodiment, the thermal material

  expanded moplastic in which the sheath is made is a

  polystyrene or polyvinyl chloride; thermo matter

  expanded plastic based on polyvinyl chloride contains about 607 by weight of polyvinyl chloride, the rest being fillers; the thickness of the pencil sheath

  is between 1.5 mm and about 4 mm.

  In a first embodiment of a pencil according to the invention, the impermeable external coating which surrounds the sheath of expanded thermoplastic material is a sheath made of a plastic material, preferably colored in the mass, which is impermeable to solvents or

  volatile products which are contained in the pencil lead.

  Advantageously, the plastic material from which the sheath is made is, like the expanded thermoplastic material

  I0 constituting the sheath, capable of being cut at the

  ment of the sharpening of the pencil; the plastic material from which the outer sheath is made is chosen from the group formed by polyvinyl chloride, polyethylene, polyesters, polystyrene, polyvinyl acetate and

15 polyamides.

  In a second variant embodiment, the coating

  the waterproof outer surface of the pencil is formed of at least one

  waterproof plastic film, preferably transparent

  annuity, which is applied to a primary layer of adhesive with which the pencil sheath is coated. This layer of adhesive

  not only to ensure the bonding of the film

  but also serves to remove the surface roughness of the sheath made of expanded thermoplastic material. The adhesive used is chosen from the group formed

  by polyvinyl chloride, polyethylene and polyaceous-

  vinyl tate. The plastic film used is

  advantageously a polyester, preferably a polyethylene-

  terephthalate known by the trade name "Mylar".

  According to an advantageous characteristic, the pencil,

  in this second variant, comprises two films in ma-

  plastic, transparent, at least one of them

  bearing on its face located opposite the other, a coating

  decorative and / or inscriptions. The decorative coating can be a metallized coating deposited on one of the two

  transparent films and the inscriptions on them

  Tees can be applied by a well-known printing technique.

  The present invention also relates to a pro-

  yielded from the manufacture of a pencil comprising a sheath made of

  expanded thermoplastic, provided with an external coating

  waterproof laughter, sheath inside which is available

  a mine, characterized by the fact that the

  sheath by extrusion; inside the extruded sheath, provided with its external coating, the active ingredients constituting the mine are poured directly, which are brought to the liquid state at a temperature below the temperature

  sheath deterioration, said sheath having been previously

  tightly closed at one of its ends; and we leave -

  cool and harden the lead which was molded in the sheath.

  Io In a first embodiment, there is coextruded with the sheath of expanded thermoplastic material, a sheath of plastic material, preferably colored in the mass, this sheath constituting the waterproof outer coating of the pencil. I5 In a second embodiment, a layer of expanded thermoplastic material is coextruded

  primer of adhesive which coats the sheath at the outlet of the

  extrusion line, then we apply around the sheath and

  the adhesive layer extruded at least one waterproof film

  wheat made of plastic, preferably transparent; the pel-

  the formula used is advantageously a polyester, preferably

  ce, a polyethylene terephthalate known under the trade designation "Mylar"; the film to be applied is heated, then it is placed in the form of a gutter around the sheath

  coated with the adhesive layer at its exit from the die of ex-

  trusion, as a result of which, the film is closed on

  itself and shaped around the sheath. It is planned to pre-

  ference, two waterproof plastic films

  at least one of which has, on its face arranged opposite

  on the other, a decorative covering and / or inscriptions.

  When one of the two films which are applied has a metallized coating, the latter has the effect of improving the heat transmission at the time of the hot casting of the

  mine and therefore the quality of crystallization of the

said mine.

  It should be noted that the pencil according to the invention

  tion can receive many applications, not only in cosmetics, but also in other fields, for example for the packaging of a stain removal product. In cosmetics, depending on the formulation chosen for the mine, the pencil

  according to the invention can be used in general with eyeshadow

  skins, concealer, blush, lipstick, shine

  lip, foundation, deodorant, perfume and anti-acne.

  To better understand the object of the present invention, we will describe below, by way of examples pu-

  These are illustrative and non-limiting, several modes of

  reading shown in the accompanying drawing.

  In this drawing: - Figure l shows schematically, in axial section, a

  pencil according to the first embodiment of the invention

  tion, and, - Figure 2 shows schematically in axial section, a

  pencil according to the second variant embodiment according to the invention-

  tion. Referring to the drawing, we see that we have designated by 1 in its entirety a pencil of which the lead 2 is made up

  with a stick of active product, for example a cosmetic product,

  only usable for makeup eyelids or eyebrows.

  The stick 2 has a consistent, pasty appearance and its

  formulation is one of those usually used

  used for make-up pencil mines.

  The mine 2 is disposed inside a sheath 3 of expanded thermoplastic material which is capable of being

  cut at the time of cutting the pencil and which is chemical-

  compatible with the products used in the composition of the lead 2. The expanded thermoplastic material from which the sheath 3 is made is, in this embodiment, a polyvinyl chloride containing additives, the content of

  polyvinyl chloride of this polymer being of the order of 607.

  in weight. Around the sheath 3 is disposed a sheath 4 of colored plastic in the mass. The plastic material from which the sheath 4 is made is capable of being cut for example by a knife or a pencil sharpener and it constitutes a tight barrier for the volatile products or the solvents contained in the mine 2. The plastic material

  used for the sleeve 4 is polyvinyl chloride.

  The pencil l can be sharpened with a pencil sharpener like any pencil with a wooden sheath. It has a tip 5 which can be placed inside a cap,

  in order to prevent the evaporation of sol-

6 2490470

  minerals or volatile products contained in mine 2.

  The pencil of this exemplary embodiment has a length of approximately 10 cm and a diameter of approximately 11 mm. The

  mine 2 has a diameter of about 4 mam; the sheath 3 has a thick

  about 3 mm thick and the waterproof sheath 4 thick

about 0.5 mm.

  The pencil 1 is produced according to the following manufacturing method: the sheath 3 is coextruded, in a conventional manner, with the sealed sheath 4, then one of the ends of I0 closes the sheath 3 thus obtained; the cosmetic product is poured inside the sheath 3, this cosmetic product being brought to the liquid state by heating. Let the product cool

  cosmetic molded in situ inside the sheath 3 to allow

  put its solidification. The cooling of the cosmetic product

  I5 tick inside the sheath may be accompanied by a shrinkage, but the roughness of the sheath made of expanded material effectively retains the mine 2 even if it has shrunk upon cooling. The sleeve 4 has the role

  ensure better sealing of the pencil vis-à-vis

  or volatile products contained in mine 2, so that any inscriptions or decorations which are

  carried by the sheath 4 are not likely to be attacked

  only by these solvents. On the other hand, the purpose of the sheath 4 is to compensate for the roughness exhibited by the external surface of the sheath 2 so that the rod 1 presents externally

a substantially smooth surface.

  Referring now to FIG. 2 of the drawing, it can be seen that the CN has designated by 10 as a whole a pencil according to the second variant embodiment of the invention. The

  pencil 10 contains a stick 11 of molded product which constitutes

  kills the mine. The composition of the mine It depends on the use of the pencil 10. If it is a makeup pencil for lipstick, the formulation of the mine It will be substantially that of a lipstick. The Il mine has a diameter of approximately 6 mm; it is wrapped inside a sheath 12 of expanded thermoplastic material. The sheath 12 is chemically inert towards the solvents or the products contained in the mine

  11 and is likely to be cut at the time of the tail-

  pencil age. The sheath 12 is made of a chloride of

  expanded polyvinyl containing additives, the chloro content

Z490470

  polyvinyl rure of the polymer being about 60%. The thick-

  The size of the sheath 12 is approximately 4 mm.

  The sheath 12 is coated externally with a primary layer 13 serving as an adhesive for a film 14; this primary layer is also used to remove

  the roughness of the outer surface of the sheath 12. The

  che ptimaire 13 is polyvinyl chloride; its thickness

  is 0.4 mm. The film 14 which adheres to the primary layer

  Mayor 13 has a metallic coating 15 bearing ins-

  OJ criptions, coating which is itself covered with a new film 16. The two films 14 and 16 are transparent and consist of a polyethylene terephthalate sold under the name of "Mylar". The thickness of the films 14 and 16

is about 0.8 mm.

  I5 To make the pencil 10 which has just been described, we first of all coextrude the sheath 12 and the primary layer of adhesive 13. At the outlet of the extrusion die, we present the two films 14 and 16 along

  of the extruded sheath coated with the primary layer 13, so

  lesson that the metallized coating 15 of the film 14 is covered by the superimposed film 16. The two films 14 and 16 are heated and formed into a gutter

  which surrounds the sheath and the primary layer extruded at the outlet

  tie of the sector; the gutter is gradually closed on itself by means of an appropriate device, then applied around the primary layer 13 in a shaping device of known type. Thus, the coating operation of the sheath 12 coated with its primary layer 13, using the two superimposed films 14 and 16 is carried out continuously at the outlet of the extrusion die. Once this operation has been completed, the product constituting mine 11 can be poured in situ, after having heated it sufficiently to do so.

  go to liquid state. After cooling and solidifying-

  tion of the mine It has been cast in place, the internal roughnesses of the sheath 12 allow effective attachment

  of mine 11, even if the latter retracts on cooling

  dissement. It can be seen that the use of a metallic film

  metallized has the effect of improving the transmission of

  their at the time of the sinking of the mine, and, consequently, the qua-

  crystallization unit of said mine.

  The metal coating 15 and the inscriptions which it carries are perfectly well protected because they are

  caught between the two films 14 and 16. Furthermore, the re-

  garment 15 and the inscriptions on it are put in place at the time of manufacture of the sheath of the cra-

  yon, by continuous coating of the sheath and its layer of a-

  adhesive at the exit of the extrusion die, so that the cost price of the finished pencil is lower than that of a conventional pencil o decorations and inscriptions

  IO are performed once the pencil sheath is finished.

  In addition, the use of the two films 14 and 16 brings about a reinforcement

  forcing the sealing of the pencil 10 and therefore allows the use

  formulation of formulations with a high proportion of solvents

or volatile products.

  Instead of the metal coating 15, it is of course possible to provide other decorations which will be protected by the two films internally, vis-à-vis the solvents

  contained in the mine formulation or externally

against

9 2490470

  scratches, friction, or oxidation by air oxygen. The invention is further illustrated by the following application examples

Example 1:

  - In a pencil of the type corresponding to FIG. 1, one sets up, as previously indicated in the

  description, an eye shadow composition resistant to

  water corresponding to the following formula: - Ozokerite ....................

  .... 2 g - Carnauba wax ...... 5 g - Acetylated lanolin ... ............... DTD: .......... ...... 6 g - Magnesium carbonate. ..1 g Iron oxides. .. 16 g - Pigment dye .. .............................. 3 g - Pearlescent agents (Mica / titanium dioxide ) .......... 20 g - Di-tertiobutyl hydroxy toluene ................... 0.2 g - Isoparaffin. ..46.8 g A water-resistant eyeshadow pencil is thus obtained. DDT: Example 2

  In a pencil of the type corresponding to FIG. 2, we set up, as previously indicated in the

  description, a composition of corresponding anhydrous eyeshadow

  based on the following formula: - Hydrogenated castor oil .. .............

  ......... 10 g - Propylene glycol monomyristate ................... 10 g Cetyl lactate ............ ...................... 7 g Ozokerite ..... DTD: .................. ................... 5 g - Paraffin oil. .......... DTD: .. 29.7g -Kaolin ............................... .............. 3 g - Pigment dye .. ............................. 10 g - Titanium dioxide .. ................................ 10 g - Di-tertiobutyl hydroxy toluene. ........ 0.3g - Pearlescent agents (Mica / titanium dioxide) ........... DTD: 15 g..DTD: This gives an anhydrous eyeshadow pencil .

Example 3:

  In a pencil of the type corresponding to FIG. 1, we set up, as previously indicated in the

  description, a concealer composition corresponding to the

  following formula: - Beeswax .............................. 10 g Carnauba wax ....... ...................... 10 g - Acetylated lanolin ....

  ...................... 5 g - Rice starch ...................... .......... DTD: 3 g..DTD: - Propylene glycol mononomyristate ......... 5 g -

  - Paraffin oil ........................... 22.7 g - Isopropyl palmitate .......... ............. 15 g - Isoparaffin ...................

  ............ 10 g - Iron oxides .......................... 5 g - Titanium dioxide ............................ 14 g - Di-tertiobutyl hydroxy toluene .............. 0.3 g..DTD: This produces a concealer pencil.

Example 4:

  In a pencil of the type corresponding to FIG. 2, we set up, as previously indicated in the

  description, a composition of blush (water emulsion

  in oil) corresponding to the following formula:

  - Magnesium lanolate .......................

  - Hydrogenated lanolin ..........................

  - Paraffin oil...........................

  - Microcrystalline wax ........................

  - Glycerides of saturated fatty acids ..............

  - Methyl parahydroxybenzoate ...............

  - Perfume .......................................

  - Iron oxides ................................

  - Titanium dioxide............................

  - Red dye "D and C RED 7" ................

  4 g 3 g g 17 g g 0.3 g 0.2 g 2.5 g 1 g 0.3 g - Sterile permuted water .......

  .... q.s.p ....... 100OO..DTD: We thus obtain a blush pencil.

g Io ll 2490470

Example 5

  In a pencil of the type corresponding to FIG. 1, we set up, as previously indicated in the

  description, a composition of anhydrous blush corresponding

  according to the following formula: - Beeswax. .10 g - Carnauba wax .................. 16 g - 2-octyl-dodecanol ................. ......

  ..... 38.8 g - Isopropyl lanolate .. 10 g - Kaolin .. 4 g - Silica .. 10 g - Propyl parahydroxybenzoate .. 0.2 g - Iron oxides .. 4 g - Colorant red "D and C RED 21" .. 1 g - Titanium dioxide .. 6 g..DTD: This produces an anhydrous blush pencil.

Example 6:

  In a pencil of the type corresponding to FIG. 2, we set up, as previously indicated in the

  description, a composition of corresponding lipstick

  to the following formula: - Ozokerite .. 25 g - Triglycerides of saturated fatty acids. . 10 g - hydrogenated lanolin ............................ 18 g isopropyl lanolate ........... ... 11.9 g - Liquid Lanolin ............. .10 .. g - Isocetyl Lanolate .............. 15 g - Ditertiobutyl hydroxy toluene .............. 0.1 g - Pigment dyes .............. 10 .. g

  This produces a lipstick pencil.

Example 7

  In a pencil of the type corresponding to FIG. 1, we set up, as previously indicated in the

  description, a composition of corresponding lipstick

12 2490470

to the following formula:

  - Ozokerite ...................................

  - Carnauba wax ............................

  - Hydrogenated lanolin ..........................

  - Lanolin ....................................

  - Cetyl Ricinoleate ........................

  - Vaseline oil ............................

  - Oleic alcohol ...............................

  - Ditertiobutyl hydroxy toluene ................

  0 - Dyes ....................................

18.9 0.1 g g g g g g g g g

  This produces a lipstick pencil.

Example 8:

  In a pencil of the type corresponding to FIG. 2, we set up, as previously indicated in the

  description, a corresponding lip gloss composition

to the following formula:

  - Microcrystalline waxes ......................

  - Lanolin .....................................

  - Liquid lanolin .............................

  - Cetyl Ricinoleate ........................

  - Lanolin alcohols ..........................

  - Vaseline oil ............................

* - Ditertiobutyl hydroxy toluene ................

  - Pigment dyes .......................

.9 -0.1 g g g g g g g g

  This produces a lip gloss pencil.

Example 9:

  In a pencil of the type corresponding to FIG. 1, we set up, as previously indicated in the

  description, a foundation composition (water emulsion

  in oil) corresponding to the following formula: - Magnesium lanolate.

  .................... 3,5 -g - Hydrogenated lanolin ...................... ... DTD:. 5.2 g Ozokerite .................................... 17 g - Isopropyl palmitate .. ..................... 9.5 g - Paraffin oil .... DTD: ............... ........ 10.5 g..DTD: 13 2490470

  - Iron oxides .................. 2.3 g - Titanium dioxide. . 8 g Propyl parahydroxybenzoate ......... 0.2 g - Sterile demineralized water.

  ... q.s.p ... 1 g We thus obtain a foundation pencil ... DTD: Example 10

  In a pencil of the type corresponding to FIG. 2, we set up, as previously indicated in the

  description, a corresponding anhydrous foundation composition

  according to the following formula: - Carnauba wax. . 6 g Paraffin oil ................ 18 g - Isopropyl lanolate. . 4 g - Isopropyl myristate .............. 33.3 g - Propyl parahydroxybenzoate. . 0.1 g - Silicone fluid "Volatile silicone 7158" sold by "Union Carbide". . 9 g - Carbonate of magnesia. . 6 g Talc ....................... 12 g Titanium dioxide. . 9 g - Iron oxides ................... 2.6 g

  An anhydrous foundation pencil is thus obtained.

Example 11:

  In a pencil of the type corresponding to FIG. 1, we set up, as previously indicated in the

  description, a corresponding anhydrous foundation composition

  according to the following formula: - Beeswax. . 3 g - Candelilla wax. .......... 1.5 g - Ozokerite .................................. .7 g - Lanolin alcohols and mineral oil ... 6 g - Paraffin oil. ...

  ...... 28.6 g - "Volatile Silicone 7158" silicone fluid sold by "Union Carbide" ................... 10 g - Isononyl-isononanoate. ............ DTD: .......... 8 g..DTD: 14 2490470

  - Isopropyl palmitate ............ 12 g - Carbonate of magnesia .........

  ......... 4 g - Talc ..................................... 10 g - Titanium dioxide ........................ 7.6 g - Iron oxides ............ ......... DTD: ...... 2.1 g - Propyl parahydroxybenzoate ........... 0.2 g..DTD: We thus obtain a pencil anhydrous foundation.

Example 12:

  In a pencil of the type corresponding to FIG. 2, we set up, as previously indicated in the

  description, a deodorant composition corresponding to the

  following formula: - Stearic acid .......................... 5 g Propylene glycol ............... ........... 40 g - Glycerin ................

  .............. 19.3 g - Polyoxyethylenated nonylphenol containing 15 moles of ethylene oxide ..................... .. 1.6 g..DTD: - 5% solution of a vegetal deodorant agent

  tal based on agaricic acid ............ 5 g - Pure soda ................

  ............. 0.8 g - Perfume ............................... .... 2 g Dye ................................. 0.01 g Water ... qs. ............ DTD: ................ 100 g..DTD: This produces a deodorant pencil.

Example 13:

  In a pencil of the type corresponding to FIG. 1, we set up, as previously indicated in the

  description, a deodorant composition corresponding to the

  following formula: - Stearic acid .......................... 7 g - Myristic alcohol ............. .......... 2 g - 2,4,4 'Trichloro-2-hydroxy-diphenyl ether ....................... ...... 0.2 g Propylene glycol .......................... 20 g - Glycerin ......... .......

.............. 2 g..DTD: 2490470

  - Pure soda ................................... 1.2 g - Fragrance ...... .... 2 g - Colorant ............ 0.0 .. 0.01 g - Alcohol at 96 c ... qs ... 109 g We thus obtain a deodorant pencil. Example 14: In a pencil of the type corresponding to FIG. 2, we set up, as previously indicated in the

  description, a perfume composition corresponding to the

  following formula: - Paraffin ...................... 5 g - Cocoa butter.

  ................... 10. g - Ozokerite ....................... 20 g - Oleic alcohol ................... ............ 5 g - Antioxidants (alkyl gallates) .... 0.05 g - Lanolin ........... 10 g - Perfume ... ........ DTD: ............................ 10 g -Colorant ........ 0.01 g - Paraffin oil ... qsp10 g..DTD: We thus obtain a perfume pencil.

Example 15:

  In a pencil of the type corresponding to FIG. 1, we set up, as previously indicated in the

  description, a perfume composition corresponding to the

  following formula: - Stearic acid..5 g - Propylene glycol..30 g Glycerin..19.3 g - Polyoxyethylenated nonylphenol with 15 moles of ethylene oxide .. 5 g - Pure soda..0.8 g - Perfume ..1 g - Colorant..0.01 g Water ... qs ... g

  A perfume pencil is thus obtained.

16 2490470

Example 16:

  In a pencil of the type corresponding to FIG. 2, we set up, as previously indicated in the

  description, an anti-acne composition corresponding to the

  following formula: - Stearic acid ............................... 20 g Soda lye at 50 B ..... .................. 5 g - Propylene glycol .......

  ...................... 10 g - Polyethylene glycol (PM = 400) .............. DTD: .. 5 g - Ethanol à '................................. 45 g - S-carboxymethyl-cysteine ... .................... 2 g - 2,4,4 'Trichloro-2'-hydroxy diphenyl ether ............. ..................... 0.1 g - Water ... q. sp ................................. 100 g..DTD: We thus obtain an anti-acne pencil .

Example 17:

  In a pencil of the type corresponding to FIG. 1, we set up, as previously indicated in the

  description, an anti-acne composition corresponding to the

  following formula: - Stearic acid ............................... 20 g Soda lye A 50 B ..... .................. 5 g - Propylene glycol ......

  ...................... 10 g - Polyethylene glycol (PM! = 400) ............. DTD: .. 10 g - Lanolin oxyethylenated with 7.5 moles of ethylene oxide ........... DTD: .................... ..... 15 g S-carboxy-methyl-cysteine ................ DTD: ..... 2 g - 2,4,4 'hydroxy trichloro ether -2 'diphenyl ................. DTD: ................. 0.1 g - Titanium oxide .. ............................. 2 g - Iron oxides ............... .................. 1.4 g Water ... qsp..DTD: ................... ............. 100 g..DTD: This produces an anti-acne pencil.

FRENCH REPUBLIC 2,490,471

NATIONAL INSTITUTE

INDUSTRIAL PROPERTY

PARIS

PATENT

OF INVENTION

UTILITY CERTIFICATE

CERTIFICATE

ADDITION

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Claims (9)

  1 - Pencil containing a mine of active product, for example cosmetic product, which is surrounded by a plastic sheath, characterized in that the sheath (3.12) is made of an expanded thermoplastic material, compatible with solvents or products used in the composition of the   mine (2, 11) and capable of being cut at the time of cutting-   lage of the pencil, said sheath being provided with an outer coating   laughing (4, 14, 16) impermeable to solvents.   2 - pencil according to claim 1, characterized in that the expanded thermoplastic material in which   is made the sheath (3, 12) is a polystyrene or a chloru- polyvinyl re.   3 - pencil according to claim 2, characterized in that the expanded thermoplastic material based on   polyvinyl chloride contains about 60. by weight of chloro   polyvinyl rure, - the remainder consisting of fillers.   4, - Pencil according to one of claims 1 to 3,   characterized by the fact that the waterproof outer coating   ble which surrounds the sheath (3) of expanded thermoplastic   sée is a sheath (4) made of a plastic material,   preferably colored in the mass, which is impermeable to sol-   or volatile products that are contained in the mine (2) pencil.   5 - Pencil according to one of claims 1 to 3,   characterized by the fact that the waterproof outer coating   ble of the pencil is formed of at least one waterproof film (14, 16) of plastic material, preferably transparent, which is applied to a primary layer of adhesive (13),   is coated with the sheath (12) of the pencil.   6 - pencil according to claim 5, characterized in that the film (14, 16) of plastic material used is a polyester, preferably a polyethylene terephthalate known under the trade name of "Mylar".   7 - Pencil according to one of claims 5 or 6,   characterized by the fact that it has two films in   transparent plastic (14, 16), at least one of them   they bear on its face located opposite the other,   a decorative covering (15) and / or inscriptions. 18 2490470   8 - Method for manufacturing a pencil comprising a sheath made of expanded thermoplastic material, provided with an external waterproof coating sheath inside which a mine is disposed, characterized in that the sheath is manufactured by extrusion and inside the extruded sheath, provided with its external coating, it flows directly. the active constituent products of the mine, which are brought to the liquid state at a temperature lower than the deterioration temperature of the sheath, said gatne having been previously closed at one of its ends, and which is allowed to cool and harden the mine which was molded in sheath.   9 - Method according to claim 8, characterized   by the fact that it coextrudes with the sheath in thermo-material   expanded plastic, a plastic sheath, of pre-   ference, colored in the mass, this sheath constituting the   waterproof outer coating of the pencil.   - Method according to claim 8, characterized   by the fact that we coextrude with the sheath in thermo-material   expanded plastic, a layer of adhesive which coats the sheath at the outlet of the extrusion die, then around the sheath and the layer of extruded adhesive is applied at least one waterproof plastic film, preferably transparent . 11 - Process according to claim 10, characterized in that the film to be applied is heated, then it is arranged in the form of a gutter around the sheath coated with the adhesive layer at its exit from the extrusion die   the film is then closed on itself and conforms to   mée around the sheath coated with the adhesive layer.   12 - Method according to one of claims 10 or   11, characterized in that two films are used   plastic raincoats, at least one of which   carries, on its face arranged opposite, a revi-   decorative ornament and / or inscriptions.