Claims
- 1. A cosmetic pencil capable of being sharpened in a conventional pencil sharpener, comprising a casing and a cosmetic composition core, wherein:
- (a) said casing:
- (i) comprises a homogeneous blend of materials, including major proportion of polyethylene whose density is in the range of between about 0.88 g/cc and 0.99 g/cc;
- (ii) is made under conditions which are substantially free of blowing agents for said polyethylene, thereby providing a non-porous casing;
- (iii) is inert to ingredients in said cosmetic composition;
- (iv) has a hardness in the range of between about 35-70 by the Shore Durometer according to the ASTM D-2240 method enabling said casing to be smoothly and evenly sharpened in a conventional pencil sharpener without significant resistance to the cutting edge of said sharpener;
- (v) has a softening point above 60.degree. C. enabling said casing to rigidly retain its shape when in contact with hot cosmetic compositions; and,
- (vi) has a wall thickness sufficient to render said casing relatively inflexible at temperatures below 60.degree. C.; and,
- (b) said cosmetic core composition comprises a solid cosmetic product in contact with said casing.
- 2. The cosmetic pencil of claim 1 wherein said density is in the range of between about 0.92 g/cc and 0.97 g/cc.
- 3. The cosmetic pencil of claim 2 wherein said casing material comprises said polyethylene and a filler, and wherein the relative weight proportion of said materials in said casing is:
- ______________________________________(a) polyethylene 77-98(b) filler 2-23.______________________________________
- 4. The cosmetic pencil of claim 3 wherein said proportion is:
- ______________________________________(a) polyethylene 77-91(b) filler 9-23.______________________________________
- 5. The cosmetic pencil of claim 3 wherein said filler is selected from talc, kaolin, mica, silica, calcium silicate, titanium dioxide, ferric oxide, aluminum silicate or titanated mica.
- 6. The cosmetic pencil of claim 3 wherein said casing is made under molding conditions.
- 7. The cosmetic pencil of claim 2 wherein said softening point is at least about 106.degree. C.
- 8. The cosmetic pencil of claim 2 wherein said polyethylene comprises:
- (a) 20 to 80% by weight of polyethylene having a density in the range of between about 0.88 g/cc and 0.95 g/cc; and
- (b) 80 to 20% by weight of polyethylene having a density in the range of between about 0.95 g/cc and 0.99 g/cc.
- 9. The cosmetic pencil of claim 8 wherein said casing is made under molding conditions.
- 10. The cosmetic pencil of claim 1 wherein said casing is made under molding conditions.
- 11. The cosmetic pencil of claim 1 wherein the bottom portion of said casing is capped with a cover.
- 12. The cosmetic pencil of claim 1 wherein said casing and core have circular cross-sections.
- 13. The cosmetic pencil of claim 12 comprising a top portion and a bottom portion and wherein the inside of said casing is tapered with the more narrow section being at the top portion and the wider section being at the bottom portion.
- 14. The process of preparing a cosmetic pencil capable of being sharpened in a conventional pencil sharpener, comprising a casing and a cosmetic composition core, wherein said casing:
- (i) comprises a homogeneous blend of materials, including major proportion of polyethylene whose density is in the range of between about 0.88 g/cc and 0.99 g/cc;
- (ii) is made under conditions which are substantially free of blowing agents for said polyethylene, thereby providing a non-porous casing;
- (iii) is inert to ingredients in said cosmetic composition;
- (iv) has a hardness in the range of between about 35-70 by the Shorre Durometer according to the ASTM D-2240 method enabling said casing to be smoothly and evenly sharpened in a conventional pencil sharpener without significant resistance to the cutting edge of said sharpener;
- (v) has a softening point above 60.degree. C. enabling said casing to rigidly retain its shape when in contact with hot cosmetic compositions; and,
- (vi) has a wall thickness sufficient to render said casing relatively inflexible at temperatures below 60.degree. C.; and, said cosmetic core composition comprises a solid cosmetic product in contact with said casing,
- said process comprising the steps of:
- (a) forming a hollow core-containing casing of a homogeneous blend of materials, including major proportion of polyethylene whose density is in the range of between about 0.88 g/cc and 0.99 g/cc, under conditions which are substantially free of blowing agents for said polyethylene, thereby forming a non-porous casing; and
- (b) filling said hollow core of said casing with a cosmetic composition.
- 15. The process of claim 14 wherein said forming steps comprise:
- (a) molding said casing by pouring said polyethylene in melted form into the hot mold for said casing; and
- (b) cooling said mold.
- 16. The process of claim 15 wherein said density is in the range of between about 0.92 g/cc and 0.97 g/cc.
- 17. The process of claim 14 wherein said casing is formed by injection molding.
- 18. The process of claim 14 wherein the said casing is formed by extrusion.
- 19. The process of claim 14 wherein said cosmetic composition is:
- (a) heated until melted;
- (b) stirred until homogeneous;
- (c) poured into said casing; and
- (d) cooled.
- 20. The process of claim 14 wherein said cosmetic composition is extruded into said casing.
- 21. The process of claim 14 wherein said cosmetic composition is injection molded into said casing.
- 22. The process of claim 14 wherein said casing and core are formed with circular cross-sections.
- 23. The process of claim 14 wherein said density is in the range of between about 0.92 g/cc and 0.97 g/cc.
Parent Case Info
This application is a continuation-in-part of U.S. patent application Ser. No. 939,887, filed Sept. 5, 1978, now abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (9)
Number |
Date |
Country |
1461292 |
May 1969 |
DEX |
2433290 |
Jan 1975 |
DEX |
2718957 |
Aug 1978 |
DEX |
1055450 |
Feb 1954 |
FRX |
2055894 |
May 1971 |
FRX |
2359586 |
Apr 1979 |
FRX |
579860 |
Jul 1958 |
ITX |
45-19124 |
Jun 1970 |
JPX |
1538188 |
Jan 1979 |
GBX |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
939887 |
Sep 1978 |
|