Synthetic plastic composition, articles made therefrom and method of manufacture

• US 20060012074A1
• Filed: 07/26/2005
• Published: 01/19/2006
• Est. Priority Date: 05/28/1999
• Status: Abandoned Application

• Current Assignee: Hi-Tech Environmental Products, LLC
• Original Assignee: Hi-Tech Environmental Products, LLC
• Inventors: Aisenberg, Yoram, Booth, Jess Rae
• Application Number:
  US11/190,505
• Publication Number:
  US 20060012074A1
• Time in Patent Office: Days
• US Class Current: 264/211
• CPC Class Codes: B29C 45/0013 using fillers dispersed in the moulding material, e.g. metal particles
• CPC Class Codes: B29C 45/1753 Cleaning or purging, e.g. of the injection unit B29C45/24 takes precedence
• CPC Class Codes: B29C 48/022 characterised by the choice of material
• CPC Class Codes: B29C 48/03 characterised by the shape of the extruded material at extrusion
• CPC Class Codes: C08K 3/22 of metals
• CPC Class Codes: C08K 3/36 Silica

Abstract

New plastic compositions, made from a uniform mixture of thermoplastic resin and a naturally occurring aluminosilicate glass (NOAG) produce articles of manufacture by a variety of molding processes that have a more uniform and smoother surface with significantly reduced sink marks, and exhibit an improved dispersion of additives and pigments. The molding machines making articles from these compositions of thermoplastic resin and NOAG exhibit an increase in throughput, lower operating temperatures, less power consumption, reduced injection pressure, and increased injection speed. Running these synthetic plastic compositions through injection, extrusion and blow molding machines also tends to clean and lubricate the screw and the injector nozzles, increasing the life of the machine parts. The NOAG is preferably present in amounts ranging from 0.1% to 3.0% by weight of the composition. The NOAG is added to the thermoplastic resin in a manner that uniformly disperses it throughout the resulting thermoplastic resin-NOAG composition. The NOAG may be added as a dry powder directly to the plastic resin preferably in a particle size smaller than 325 mesh. The NOAG also may be added to the plastic resin in pellet form of various sizes, encapsulated by a carrier such as LLDPE, or may be directly compounded into the thermoplastic resin.

Claims

1. A composition comprising

a plastic resin;

and

a predominately vitreous, naturally occurring formulation;

Silicon Dioxide (SiO₂)—

about 73.0%,

Aluminum Oxide (Al₂O₃) and

other oxides and trace minerals each less than about 5.0%, the formulation being in a quantity of less than about 2% by weight of the composition.

2. The composition of claim 1, the predominately vitreous formulation being in a quantity greater than about 0.5% by weight of the composition.

3. The composition of claim 1, the predominately vitreous formulation being predominantly in a particle size range below about 75 microns.

4. An article of manufacture made from a composition comprising a plastic resin;

and

a predominately vitreous material comprising silicon dioxide and aluminum oxide uniformly dispersed throughout the composition, the material comprising silicon dioxide and aluminum oxide being in a quantity of less than about 2% by weight of the composition to improve flow in the formation of the article.

5. The article of manufacture of claim 4, the predominately vitreous material comprising silicon dioxide and aluminum oxide being in a quantity greater than about 0.5% by weight of the composition.

6. The article of manufacture of claim 4, the predominately vitreous material comprising silicon dioxide and aluminum oxide being predominantly in a particle size range below about 75 microns.

7. A method for forming articles, comprising

selecting a plastic resin;

dispersing a predominately vitreous material comprising silicon dioxide and aluminum oxide uniformly throughout the selected plastic resin to form a composition, the material comprising silicon dioxide and aluminum oxide being in a quantity of less than about 2% by weight of the composition to improve flow in the formation of the articles; and

forming articles by flowing the composition under pressure.

8. The method of claim 7, the predominately vitreous material comprising silicon dioxide and aluminum oxide being in a quantity of greater than about 0.5% by weight of the composition.

9. The method of claim 7, the predominately vitreous material comprising silicon dioxide and aluminum oxide being predominantly in a particle size range below about 75 microns.

10. The method of claim 7, the material comprising silicon dioxide and aluminum oxide dispersed being naturally occurring.

11. A composition for the formation of articles, comprising

a plastic resin;

and

a predominately vitreous material comprising silicon dioxide and aluminum oxide uniformly dispersed throughout the composition, the material being in a quantity of less than about 2% by weight of the composition to improve flow in the formation of the articles.

12. The composition of claim 11 therein the vitreous material is in a quantity greater than about 0.5% by weight of the composition.

13. The composition of claim 12 further comprising

a carrier for the predominately vitreous material.

14. The composition of claim 13, the predominately vitreous material being in pellet form with the carrier before dispersion within the composition.

15. The composition of claim 11, the predominately vitreous material being predominantly in a particle size range below about 75 microns.

16. The composition of claim 11, the predominately vitreous material being naturally occurring.