Solid-state stretched HDPE

Patent metadata

Field	Value
Publication number	US-9505161-B2
Application number	US-201414250002-A
Country	US
Kind code	B2
Filing date	Apr 10, 2014
Priority date	Apr 10, 2014
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

An ISBM article is disclosed wherein the ISBM article is made from an HDPE resin having a MI2 of 0.1 to 5.0 dg/min as measured by ASTM D-1238; 190° C./2.16 kg, a density of from 0.940 to 0.970 g/cc as measured by ASTM D792, a peak molecular weight of greater than 40,000 g/mol and a zero shear viscosity between 15,000 and 250,000 Pa·sec.

First claim

What is claimed is:

1. An injection stretch blow molded (ISBM) bottle comprising:
an HDPE resin having a MI2 of 0.1 to 5.0 dg/min as measured by ASTM D-1238; 190° C./2.16 kg, density of from 0.940 to 0.959 g/cc as measured by ASTM D792, a peak molecular weight of greater than 40,000 g/mol and a zero shear viscosity between 15,000 and 250,000 Pa·sec, wherein said HDPE resin is bimodal, and wherein said HDPE resin is the only HDPE resin of the ISBM bottle.

2. The bottle of claim 1 , wherein said HDPE resin has an MI2 of from 0.25 to 1.0 dg/min, as measured by ASTM D-1238; 190° C./2.16 kg.

3. The bottle of claim 1 , wherein said HDPE resin has a peak molecular weight of greater than 50,000 g/mol.

4. The bottle of claim 1 , wherein said HDPE resin has a zero shear viscosity between 35,000 to 70,000 Pa·sec.

5. The bottle of claim 1 , wherein the MI2 of said HDPE resin is between 0.4 and 0.7 dg/min as measured by ASTM D-1238.

6. The bottle of claim 1 , wherein the Mw of said HDPE resin is between 130,000 and 170,000.

7. The bottle of claim 1 , wherein the density of said HDPE resin is between 0.958 and 0.959 g/cc as measured by ASTM D792.

8. The bottle of claim 1 , wherein the relaxation time of said HDPE resin is between 0.015 and 0.060 seconds.

9. The bottle of claim 1 , wherein said HDPE resin has a polydispersity ranging from 5 to 15, a weight average molecular weight ranging from 100,000 to 200,000, and a relaxation time of from 0.015 to 0.060 seconds.

10. An injection stretch blow molded (ISBM) bottle comprising:
an HDPE resin having MI2 of 0.5 to 8.0 dg/min as measured by ASTM D-1238; 190° C./2.16 kg, a polydispersity (Mw/Mn) of from 3.0 to 6.0, and a zero shear viscosity between 2,500 to 12,500 Pa·sec; wherein said ISBM bottle has a 45° gloss of greater than or equal to 50 as measured by ASTM D523 and a haze of less than or equal to 25% as measured by ASTM 1003, and wherein said HDPE resin is the only HDPE resin of the ISBM bottle.

11. The bottle of claim 10 , wherein said HDPE resin has an MI2 of 1.5 to 3.0 dg/min as measured by ASTM D-1238; 190° C./2.16 kg.

12. The bottle of claim 10 , wherein said HDPE resin is unimodal.

13. The bottle of claim 10 , wherein said ISBM bottle has a 45° gloss of greater than 60 as measured by ASTM D523.

14. The bottle of claim 10 , wherein said ISBM bottle has a haze of less than 15% as measured by ASTM 1003.

15. An injection stretch blow molded (ISBM) bottle comprising:
an HDPE resin having a MI2 of 0.4 to 0.7 dg/min as measured by ASTM D-1238; 190° C./2.16 kg, a density of from 0.958 to 0.959 g/cc as measured by ASTM D792, a peak molecular weight of greater than 40,000 g/mol and a relaxation time of between 0.015 and 0.060 seconds, wherein said HDPE resin is bimodal or unimodal, and wherein said HDPE resin is the only HDPE resin of the ISBM bottle.

16. The article of claim 15 , wherein said HDPE resin is bimodal.

17. A method of forming an injection stretch blow molded bottle comprising:
providing an HDPE resin having a MI2 of 0.1 to 5.0 dg/min as measured by ASTM D-1238; 190° C./2.16 kg, density of from 0.940 to 0.959 g/cc as measured by ASTM D792, a peak molecular weight of greater than 40,000 g/mol and a zero shear viscosity between 15,000 to 250,000 Pa·sec, wherein said HDPE resin is bimodal;
injection molding said HDPE resin into a preform; and
stretch-blowing said preform into a bottle, wherein said HDPE resin is the only HDPE resin of the ISBM bottle, wherein said method has a failure rate of 10% or less.

18. The method of claim 17 , wherein said method has a failure rate of less than 2%.

19. The method of claim 17 , wherein said HDPE resin has a polydispersity ranging from 5 to 15, a weight average molecular weight ranging from 100,000 to 200,000, a relaxation time of from 0.015 to 0.060 seconds, and wherein said method has a failure rate of less than 2%.

20. A method of forming an injection stretch blow molded bottle comprising:
providing an HDPE resin having MI2 of 0.5 to 8.0 dg/min as measured by ASTM D-1238; 190° C./2.16 kg, a polydispersity (Mw/Mn) of from 3.0 to 6.0, and a zero shear viscosity between 2,500 to 12,500 Pa·sec;
injection molding said HDPE resin into a preform; and
stretch-blowing said preform into a bottle, wherein said bottle has a 45° gloss of greater than or equal to 50 as measured by ASTM D523 and a haze of less than or equal to 25% as measured by ASTM 1003, and wherein said HDPE resin is the only HDPE resin of the bottle.

21. The method of claim 20 , wherein said HDPE resin is unimodal.

22. A method of forming an injection stretch blow molded bottle comprising:
providing a high density polyethylene resin having a MI2 of 0.1 to 5.0 dg/min as measured by ASTM D-1238 at a temperature of 190° C. and a load of 2.16 kg; a density of from 0.940 to 0.970 g/cc as measured by ASTM D792; a peak molecular weight of greater than 40,000 g/mol; and a zero shear viscosity between 15,000 and 250,000 Pa·sec;
injection molding the high density polyethylene resin into a preform; and
stretch-blowing the preform into the injection stretch blow molded bottle, wherein the method has a failure rate of less than 10%.

23. The method of claim 22 , wherein the method has a failure rate of less than 2%.

24. A method of forming an injection stretch blow molded bottle comprising:
providing a high density polyethylene resin having MI2 of 0.5 to 8.0 dg/min as measured by ASTM D-1238 at a temperature of 190° C. and a load of 2.16 kg; a polydispersity (Mw/Mn) of from 2.0 to 7.0; and a zero shear viscosity between 1000 to 50,000 Pa·sec;
injection molding the high density polyethylene resin into a preform; and
stretch-blowing the preform into the injection stretch blow molded bottle, wherein the injection stretch blow molded bottle has a 45° gloss of greater than or equal to 50 as measured by ASTM D523 and a haze of less than or equal to 25% as measured by ASTM 1003.

25. The method of claim 24 , wherein the injection stretch blow molded bottle has a 45° gloss of greater than 60 as measured by ASTM D523.

26. The method of claim 24 , wherein the injection stretch blow molded bottle has a haze of less than 15% as measured by ASTM 1003.

Assignees

• Fina Technology

Inventors

• Sun Luyi
• Mcleod Michael
• Ashbaugh John
• Li Fengkui
• Daniels Leland

Classifications

• B29K2995/0063

  Density · CPC title

• B29K2995/0088

  Molecular weight · CPC title

• B29K2105/0094

  having particular viscosity · CPC title

• B29K2023/065

  HDPE, i.e. high density polyethylene · CPC title

• C08L2203/10

  used for bottles · CPC title