Thermoplastic molding material and molded body made of the material
A thermoplastic molding material contains between 10% and 35% by weight of an ethylene copolymer wax with hydrophilic groups, with a melting point between 75° C. and 110° C. and cellulose containing fibers with a share of between 45% and 90% by weight relative to the dry mass of the fibers. Molded bodies may be formed from the molding material, such as pencil casings.
1. A thermoplastic molding material, comprising:
a polymer matrix formed primarily or entirely of an ethylene copolymer wax containing hydrophilic groups and having a melting point of 75° C. to 110 ° C.; and
cellulose-containing fibers embedded in said polymer matrix;
wherein said ethylene copolymer wax is present in the molding material with a share of 10% to 35% by weight and said cellulose-containing fibers are present with a share of 45% to 90% by weight relative to a dry mass of said fibers.
2. The molding material according to claim 1 , wherein said fibers are present in a share of 60% by weight to 90% by weight, relative to the dry mass of the fibers.
3. The molding material according to claim 1 , wherein said ethylene copolymer wax has a melting point of 75° C. to 85° C.
4. The molding material according to claim 1 , which further comprises at least one filler in addition to said fibers.
5. The molding material according to claim 4 , which comprises at least one inorganic filler.
6. The molding material according to claim 4 , which comprises a maximum of 10% by weight of filler.
7. The molding material according to claim 1 , which further comprises a lubricant.
8. The molding material according to claim 7 , wherein said lubricant is selected from the group consisting of waxes, oils, and fatty acid derivatives.
9. The molding material according to claim 7 , wherein said lubricant has a maximum share of 15% by weight.
10. The molding material according to claim 1 , which comprises oxidized polyethylene.
11. The molding material according to claim 10 , wherein a share of said oxidized polyethylene is 0.1% by weight to 8% by weight.
12. A molded body formed by extrusion of a molding material according to claim 1 .
13. The molded body according to claim 12 , formed into a casing for a writing implement, a drawing implement, a painting implement, or a cosmetic implement.
14. The molded body according to claim 12 , which comprises a content of natural or synthetic resin.
15. The molded body according to claim 14 , wherein a content of said resin is maximally 5% by weight.