US5333439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-melt pressure sensitive adhesive packaging, preform, and method
Assignee: National Starch and Chemical Investment Holding Corp
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Filing: 1992-09-22
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Granted: 1994-08-02
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Expires: 2012-09-22
Abstract
Abstract The present invention is directed to a release package, a preform, of the release package, and a method for releasably packaging a hot-melt pressure sensitive adhesive. The method for releasably packaging a hot-melt pressure sensitive adhesive comprises: coating a face of a continuous sheet of heat sealable film with a silicone coating, said continuous sheet having two opposing longitudinal edges, namely a first longitudinal edge and an opposite longitudinal edge, the coating providing a pattern such that an area along at least one of the two opposing edges is uncoated and capable of forming a heat seal with another uncoated portion of the film; adhering a micronized powder to the siliconized coating of the continuous sheet to form a siliconized and powdered preform; heat sealing the uncoated edge of the preform to the opposite edge of the preform to form a continuous tubular film capable of receiving and powder coating an extruded hot-melt pressure sensitive adhesive therein; extruding a hot-melt pressure sensitive adhesive into the continuous tubular film; and crimping the continuous tubular film at a predetermined distance such that a predetermined amount of the extruded hot-melt pressure sensitive adhesive is isolated and powder coated between at least two of the crimps.
Inventors
- 👤 Frank Bozich
- 👤 Charles J. King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:19
CPC Classifications
B; B65; B65D; B65D65/00; B65D65/38; B65D65/42; B65B; B65B29/00; B65B33/00
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
150 words
A preform for the releasable packaging of hot-melt pressure sensitive adhesive comprising: a continuous sheet of a heat sealable film having two opposing longitudinal edges, a first edge and an opposite edge, and two opposing faces, the continuous sheet having a patterned silicone coating on one face wherein the patterned silicone coating is such that an area along at least the first of the opposing edges on said silicone coated face remains uncoated, such that the uncoated area along the first edge is capable of forming a heat seal with a second uncoated area in proximity to said opposite edge, the continuous coated sheet further having a proximal end and a distal end, the silicone coating at said proximal end further having the capacity to adhere thereto an amount of a micronized powder that is effective to provide a releasable contact between a hot-melt pressure sensitive adhesive in contact therewith.
Claim 2
Dependent Claim
150 words
A preform for the releasable packaging of hot-melt pressure sensitive adhesive comprising: a continuous sheet of a heat sealable film having two opposing longitudinal edges, a first edge and an opposite edge, and two opposing faces, the continuous sheet having a patterned silicone coating on one face wherein the patterned silicone coating is such that an area along at least the first of the opposing edges on said silicone coated face remains uncoated, such that the uncoated area along the first edge is capable of forming a heat seal with a second uncoated area in proximity to said opposite edge, the continuous coated sheet further having a proximal end and a distal end, the silicone coating at said proximal end further having the capacity to adhere thereto an amount of a micronized powder that is effective to provide a releasable contact between a hot-melt pressure sensitive adhesive in contact therewith.
Claim 3
Dependent Claim
30 words
The preform of claim 1 wherein said film has a patterned silicone coating such that on the silicone coated face an area along one of the opposing edges remains uncoated.
Claim 4
Dependent Claim
31 words
The preform of claim 1 wherein said film has a patterned silicone coating such that on the silicone coated face an area along each of the two opposing edges remains uncoated.
Claim 5
Dependent Claim
27 words
The preform of claim 2 wherein the heat sealable film is a polymeric multi-ply laminate having a heat sealable exterior layer and a heat resistant inner layer.
Claim 6
Dependent Claim
14 words
The preform of claim 4 wherein the heat sealable exterior layer is a polyethylene.
Claim 7
Dependent Claim
14 words
The preform of claim 5 wherein the heat resistant inner layer is polyethylene terephthalate.
Claim 8
Dependent Claim
28 words
The preform of claim 6 wherein the micronized powder is a member of the group consisting of synthetic waxes, polyethylene waxes, polytetrafluoroethylene, talc, calcium carbonate and combinations thereof.
Claim 9
Dependent Claim
22 words
The preform of claim 7 wherein the micronized powder has a mean particle size within the range from 1.0 to 100 microns.
Claim 10
Dependent Claim
26 words
The preform of claim 8 wherein the micronized powder is a synthetic wax having a mean particle size within the range from 1 to 25 microns.
Claim 11
Dependent Claim
19 words
The preform of claim 9 wherein said micronized powders have a melting point between 145° F. and 400° F.
Claim 12
Dependent Claim
104 words
A release packaging for hot-melt pressure sensitive adhesives comprising: a tubular film formed from a heat sealable polymeric material that has been heat sealed longitudinally along opposing edges, said tubular film having an inside face and an outside face, substantially all of said inside face being silicone coated and having a micronized powder adhering thereon, said tubular film being capable of receiving and powder coating a predetermined amount of a hot-melt pressure sensitive adhesive composition, said tubular film also being capable of being crimped so as to isolate and releasably package a predetermined amount of hot-melt pressure sensitive adhesive between two of said crimps.
Claim 13
Dependent Claim
104 words
A release packaging for hot-melt pressure sensitive adhesives comprising: a tubular film formed from a heat sealable polymeric material that has been heat sealed longitudinally along opposing edges, said tubular film having an inside face and an outside face, substantially all of said inside face being silicone coated and having a micronized powder adhering thereon, said tubular film being capable of receiving and powder coating a predetermined amount of a hot-melt pressure sensitive adhesive composition, said tubular film also being capable of being crimped so as to isolate and releasably package a predetermined amount of hot-melt pressure sensitive adhesive between two of said crimps.
Claim 14
Dependent Claim
20 words
The release packaging of claim 11 wherein said heat seal has been formed along opposing edges on the same face.
Claim 15
Dependent Claim
20 words
The release packaging of claim 11 wherein said heat seal has been formed along opposing edges on the opposite face.
Claim 16
Dependent Claim
29 words
The release packaging preform of claim 12 wherein the heat sealable film is a multi-ply laminate film having a heat sealable exterior layer and a heat resistant inner layer.
Claim 17
Dependent Claim
16 words
The release packaging preform of claim 14 wherein the heat sealable exterior layer is a polyethylene.
Claim 18
Dependent Claim
16 words
The release packaging preform of claim 15 wherein the heat resistant inner layer is polyethylene terephthalate.
Claim 19
Dependent Claim
27 words
The release packaging preform of claim 16 wherein the micronized powder is a member of the group consisting of synthetic waxes, polyethylene waxes, polytetrafluoroethylene and combinations thereof.
Claim 20
Dependent Claim
24 words
The release packaging preform of claim 17 wherein the micronized powder has a mean particle size within the range from 1.0 to 100 microns.
Claim 21
Dependent Claim
24 words
The release packaging preform of claim 18 wherein the micronized powder has a mean particle size within the range from 1 to 25 microns.
Claim 22
Dependent Claim
20 words
The release packaging for claim 19 wherein said micronized powders have a melting point between 145° F. and 400° F.
Claim 23
Independent Claim
191 words
A method for releasably packaging a hot-melt pressure sensitive adhesive composition comprising the steps of: a. providing a preform comprising a continuous sheet of heat sealable film having two opposing longitudinal edges, said continuous sheet being pattern coated with silicone on at least one face such that an area along the first edge of the coated face remains uncoated and capable of forming a heat seal with a second uncoated area in proximity with the opposite edge on either face; b. heat sealing the uncoated area along the first edge of the preform to an uncoated area along the opposite edge of the preform to form a continuous tubular film capable of releasably receiving an extruded hot-melt pressure sensitive adhesive therein, and c. extruding a hot-melt pressure sensitive adhesive into said continuous tubular film at a predetermined rate; and d. crimping said continuous tubular film at a predetermined distance such that a predetermined amount of the hot-melt pressure sensitive adhesive is isolated between at least two of the crimps, whereby upon cooling, the isolated predetermined amount of hot-melt pressure sensitive adhesive is releasably packaged between at least two of said crimps.
Claim 24
Independent Claim
191 words
A method for releasably packaging a hot-melt pressure sensitive adhesive composition comprising the steps of: a. providing a preform comprising a continuous sheet of heat sealable film having two opposing longitudinal edges, said continuous sheet being pattern coated with silicone on at least one face such that an area along the first edge of the coated face remains uncoated and capable of forming a heat seal with a second uncoated area in proximity with the opposite edge on either face; b. heat sealing the uncoated area along the first edge of the preform to an uncoated area along the opposite edge of the preform to form a continuous tubular film capable of releasably receiving an extruded hot-melt pressure sensitive adhesive therein, and c. extruding a hot-melt pressure sensitive adhesive into said continuous tubular film at a predetermined rate; and d. crimping said continuous tubular film at a predetermined distance such that a predetermined amount of the hot-melt pressure sensitive adhesive is isolated between at least two of the crimps, whereby upon cooling, the isolated predetermined amount of hot-melt pressure sensitive adhesive is releasably packaged between at least two of said crimps.
Claim 25
Dependent Claim
62 words
The method of claim 21 further comprising between Steps (a) and (b) the step of adhering micronized powder to the siliconized coating of the continuous sheet to form a siliconized and powdered preform, such that the predetermined amount of the hot-melt pressure sensitive that is isolated between two of the crimps in said continuous tubular film is also powder coated and handleable.
Claim 26
Dependent Claim
17 words
The method of claim 21 wherein in Step (d) said crimping is maintained by a wire closure.
Claim 27
Dependent Claim
14 words
The method of claim 21 wherein said crimping is performed by a chilled roller.
Claim 28
Dependent Claim
20 words
The method of claim 21 wherein said continuous film is silicone coated with a continuous longitudinal stripe on one face.
Claim 29
Dependent Claim
37 words
The method of claim 25 wherein during the heat sealing step, the uncoated area along the first edge of said coated face is caused to overlap a corresponding area along the opposite edge on the opposing face.
Claim 30
Dependent Claim
34 words
The method of claim 25 wherein said continuous film is silicone coated in a pattern such that an area in proximity to each of said two opposing edges on the same face is uncoated.
Claim 31
Dependent Claim
31 words
The method of claim 21 wherein said pattern coated continuous sheet is one of a series of pattern coated continuous sheets that has been cut from a multiple patterned continuous sheet.
Claim 32
Dependent Claim
13 words
The method of claim 21 wherein said silicone coating is electron beam cured.
Claim 33
Dependent Claim
23 words
The method of claim 29 wherein the continuous sheet of heat sealable film is a polymeric laminate having from 1 to 3 plys.
Claim 34
Dependent Claim
12 words
The method of claim 30 wherein the polymeric laminate has three plys.
Claim 35
Dependent Claim
12 words
The method of claim 31 wherein the three-ply laminate is polyethylene/polyethylene terephthalate/polyethylene.
Claim 36
Dependent Claim
94 words
A release packaging for hot-melt pressure sensitive adhesives comprising: a tubular film formed from a heat sealable polymeric material that has been heat sealed longitudinally along opposing edges, said tubular film having an inside face and an outside face, substantially all of said inside face being silicone coated, said tubular film being capable of receiving a predetermined amount of a hot-melt pressure sensitive adhesive composition, said tubular film also being capable of being crimped so as to isolate and releasably package a predetermined amount of hot-melt pressure sensitive adhesive between two of said crimps.
Claim 37
Dependent Claim
94 words
A release packaging for hot-melt pressure sensitive adhesives comprising: a tubular film formed from a heat sealable polymeric material that has been heat sealed longitudinally along opposing edges, said tubular film having an inside face and an outside face, substantially all of said inside face being silicone coated, said tubular film being capable of receiving a predetermined amount of a hot-melt pressure sensitive adhesive composition, said tubular film also being capable of being crimped so as to isolate and releasably package a predetermined amount of hot-melt pressure sensitive adhesive between two of said crimps.
Claim 38
Dependent Claim
21 words
The release packaging of claim 33 wherein said heat sealable polymeric material is adhesively compatible with said hot-melt pressure sensitive adhesive.
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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) | 1997-08-01 | 1998-01-31 | 1998-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-01 | 2002-01-31 | 2002-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-01 | 2006-01-31 | 2006-08-02 | $7700.00 | Window Closed / Lapsed |