Patent US5109892A successfully refreshed from Google Patents.
US5109892A
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Process for packaging amorphous polyolefins
Assignee: Eastman Chemical Co
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Filing: 1990-12-27
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Granted: 1992-05-05
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Expires: 2010-12-27
Abstract
Abstract A process for packaging normally tacky amorphous polyolefins is provided. The process entails flowing a heated amorphous polyolefin into a molded polyolefin container having a relatively thick wall at a temperature above the melting point of the container, followed by slowly cooling the filled container.
Inventors
- 👤 Marc S. Somers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:05
CPC Classifications
B; B65; B65B; B65B63/00; B65B63/08
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
65 words
A process for packaging amorphous polyolefins comprising: (a) supplying an amorphous polyolefin at a flowable temperature, (b) flowing said amorphous polyolefin into a molded polyolefin container having a wall thickness of at least 10 mils wherein the material of said container has a melting point below the temperature at which said amorphous polyolefin is flowed into the container, and (c) slowly cooling the filled container.
Claim 2
Dependent Claim
65 words
A process for packaging amorphous polyolefins comprising: (a) supplying an amorphous polyolefin at a flowable temperature, (b) flowing said amorphous polyolefin into a molded polyolefin container having a wall thickness of at least 10 mils wherein the material of said container has a melting point below the temperature at which said amorphous polyolefin is flowed into the container, and (c) slowly cooling the filled container.
Claim 3
Dependent Claim
70 words
The process according to claim 1 wherein said amorphous polyolefin is flowed into said container at a temperature between about 150° C. and about 230° C. at a fill rate between about 1 and about 300 pounds per minute per container and is cooled at about 0.05° C. to about 0.45° C. per minute, based on the core temperature, down to a core temperature of about 100° C. or below.
Claim 4
Dependent Claim
41 words
The process according to claim 2 wherein said amorphous polyolefin is flowed into said container at a temperature between about 190° C. and about 200° C. at a fill rate between about 8 and about 20 pounds per minute per container.
Claim 5
Dependent Claim
42 words
The process according to claim 1 wherein the said flowable temperature is less than about y° C. wherein y=8.54 times the melting point of the container material in degrees celsius times the minimum wall thickness of the container in inches plus 143.
Claim 6
Dependent Claim
29 words
The process according to claim 1 wherein said container is cooled at essentially ambient conditions for about 8 to about 24 hours prior to significant contacting other filled containers.
Claim 7
Dependent Claim
30 words
The process according to claim 1 wherein said container is cooled by flowing water or air around the container at a temperature between about 0° C. to about 40° C.
Claim 8
Dependent Claim
58 words
The process according to claim 1 wherein said container material has a melting point no more than about 40° C. below the temperature at which the amorphous polyolefin is flowed into the container and said container has a ΔT across the container wall between about 0.5° C. to about 0.9° C. per mil at room temperature when filled.
Claim 9
Dependent Claim
34 words
The process according to claim 1 wherein said container has an internal diameter or internal width between about 4 inches and about 12 inches and a volume of about 1 to about 10 gal.
Claim 10
Dependent Claim
21 words
The process according to claim 1 wherein the wall thickness of said container is between about 10mils and about 150 mils.
Claim 11
Dependent Claim
21 words
The process according to claim 1 wherein said molded polyolefin container is made from polyolefins that are compatible with asphalt blends.
Claim 12
Dependent Claim
34 words
The process according to claim 10 wherein said molded polyolefin container is made from a polyolefin selected from the group consisting of polypropylene homopolymers, ethylene-propylene random copolymers, impact copolymers, filled polypropylenes and polypropylene blends.
Claim 13
Dependent Claim
27 words
The process according to claim 1 wherein said amorphous polyolefin is maintained at an elevated temperature in a heated vessel and flowed into a plurality of containers.
Claim 14
Dependent Claim
24 words
The process according to claim 12 wherein said vessel is a heated storage container and said amorphous polyolefin is heated during the polymerization reaction.
Claim 15
Dependent Claim
28 words
The process according to claim 1 wherein said amorphous polyolefin is normally soft and tacky at about room temperature, solidifies slowly, and has a low degree of crystallinity.
Claim 16
Dependent Claim
42 words
The process according to claim 14 wherein said amorphous polyolefin is amorphous polypropylene or amorphous propylene-ethylene copolymer having a RBSP between about 120° C. and about 160° C. and a Brookfield thermal viscosity between about 2,000 and about 20,000centipoise at 190° C.
Claim 17
Dependent Claim
63 words
An article of manufacture comprising a molded container of polyolefin containing a solid block of amorphous polyolefin essentially filling the void of the container wherein the polyolefin of said molded container has a melting point below the temperature at which said amorphous polyolefin is flowed into said container and said container has a wall thickness between about 30 mils and about 125 mils.
Claim 18
Dependent Claim
63 words
An article of manufacture comprising a molded container of polyolefin containing a solid block of amorphous polyolefin essentially filling the void of the container wherein the polyolefin of said molded container has a melting point below the temperature at which said amorphous polyolefin is flowed into said container and said container has a wall thickness between about 30 mils and about 125 mils.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-05-05 | 1995-11-04 | 1996-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-05 | 1999-11-04 | 2000-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-05 | 2003-11-04 | 2004-05-05 | $7700.00 | Window Closed / Lapsed |