Plastic ball

• US 5,766,707 A
• Filed: 08/29/1995
• Issued: 06/16/1998
• Est. Priority Date: 09/29/1994
• Status: Expired due to Term

• Current Assignee: Gebruder Obermaier Ohg
• Original Assignee: Gebruder Obermaier Ohg
• Inventors: Obermaier, Anton
• Primary Examiner(s): Le, H. Thi
• Application Number:
  US08/520,650
• Time in Patent Office: 1,022 Days
• Field of Search: 273/58 R, 273/58 A, 273/58 BA, 273/58 K, 273/DIG. 5, 273/DIG. 16, 428/420, 428/424.6, 428/518, 428/217, 428/35.7, 33/732, 473/604, 473/608
• US Class Current: 428/35.7
• CPC Class Codes: A63B 2208/12 specially adapted for children
• CPC Class Codes: A63B 39/06 Special coverings
• CPC Class Codes: B29C 70/58 comprising fillers only , e.g. particles, powder, beads, flakes, spheres B29C70/025 takes precedence, agglomerating hollow spheres to produce synthetic foam B29C70/66; compounding ingredients per se C08K
• CPC Class Codes: B29K 2027/06 PVC, i.e. polyvinylchloride
• CPC Class Codes: B29L 2031/54 Balls
• CPC Class Codes: C08L 2205/04 containing interpenetrating networks
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: C08L 27/06 Homopolymers or copolymers of vinyl chloride
• CPC Class Codes: C08L 33/04 Homopolymers or copolymers of esters C08L43/04 takes precedence
• CPC Class Codes: Y10T 428/1352 Polymer or resin containing [i.e., natural or synthetic]
• CPC Class Codes: Y10T 428/24983 Hardness
• CPC Class Codes: Y10T 428/3158 Halide monomer type [polyvinyl chloride, etc.]
• CPC Class Codes: Y10T 428/3192 Next to vinyl or vinylidene chloride polymer

Abstract

A plastic ball is disclosed, in particular a PVC air ball having a ball skin consisting of a skin base substance, in which a predetermined amount of stiffening material the hardness of which is greater than that of the skin base substance is added to the skin base substance.

Claims

1. A plastic ball having a ball skin consisting of a skin base substance, comprising a predetermined amount of an acrylate or methacrylate stiffening material, the hardness of which is greater than that of said skin base substance to which said stiffening material is added.

2. A plastic ball according to claim 1, wherein the stiffening material contains alkyl acrylate or alkyl methacrylate.

3. A plastic ball according to claim 2, wherein the stiffening material contains polymethyl methacrylate.

4. A plastic ball according to claim 1, wherein the stiffening material represents a portion by weight of 1 to 30% of the total weight of said plastic ball.

5. A plastic ball according to claim 4, wherein the stiffening material represents a portion by weight of 5 to 20% of the total weight of said plastic ball.

6. A plastic ball according to claim 5, wherein the stiffening material represents a portion by weight of 10 to 17% of the total weight of said plastic ball.

7. A plastic ball according to claim 6, wherein the stiffening material represents a portion by weight of about 15% of the total weight of said plastic ball.

8. A plastic ball according to claim 1, wherein the stiffening material is in powder form.

9. A plastic ball according to claim 8, wherein the particle size of the stiffening material has a maximum size of 10 to 500 μ

m.

10. A plastic ball according to claim 9, wherein the particle size of the stiffening material has a maximum size of 20 to 100 μ

m.

11. A plastic ball according to claim 10, wherein the particle size of the stiffening material has a maximum size of 30 to 70 μ

m.

12. A plastic ball according to claim 11, wherein the particle size of the stiffening material has a maximum size of 40 to 60 μ

m.

13. A plastic ball according to claim 1, wherein the stiffening material is distributed substantially uniformly over the said ball skin.

14. A plastic ball according to claim 1, wherein the plastic ball is an air ball which is made of plasticized polyvinylchloride.

15. A plastic ball according to claim 1, wherein the stiffening material contains chopped pieces of a hard sheet.

16. A plastic ball according to claim 15, wherein said surfaces formed by said pieces of chopped hard sheet have an irregular shape.

17. A plastic ball according to claim 16, wherein said irregular surfaces formed by said pieces of chopped hard sheet have dimensions within the range of 1 to 30 mm.

18. A plastic ball according to claim 16, wherein the surfaces formed by the stiffening material account as a whole for a percentage of 1 to 30% of the total surface of the ball.

19. A plastic ball according to claim 15, wherein said hard sheet has a thickness within the range of 0.1 to 1 mm.

20. A plastic ball according to claim 15, wherein said hard sheet has a thickness within the range of 0.2 to 0.5 mm.

21. A plastic ball according to claim 15, wherein said hard sheet has a thickness within the range of 0.3 to 0.4 mm.

22. A plastic ball according to claim 21, wherein said hard sheet has a percentage of plasticizer.