IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0098066
(2005-04-04)
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등록번호 |
US-8443793
(2013-05-21)
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발명자
/ 주소 |
- Payen, Vincent
- Wadlinger, Michael
- Mitchell, Joseph
- Finn, Robert
- Harmsen, George Carl
- Myers, Dennis L.
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출원인 / 주소 |
|
대리인 / 주소 |
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인용정보 |
피인용 횟수 :
0 인용 특허 :
25 |
초록
▼
A heating apparatus includes an elongated flexible envelope (4) comprising two sheets (6), (8) that are attached to each other along permanent side seams (10), (12) and along a permanent bottom seam (14) and a moisture-activated chemical heater (16) disposed inside envelope (4), wherein envelope (4)
A heating apparatus includes an elongated flexible envelope (4) comprising two sheets (6), (8) that are attached to each other along permanent side seams (10), (12) and along a permanent bottom seam (14) and a moisture-activated chemical heater (16) disposed inside envelope (4), wherein envelope (4) is folded over on itself and secured by temporary side seams (18), (20) and a permanent top seam (22) to form a continuous moisture barrier surrounding the moisture activated chemical heater (16) and wherein heater (2) may be opened for use by removing top seam (22) and unfolding envelope (4) by unpeeling temporary seals (18), (20) to provide unfolded envelope (4), wherein sheets (6) and (8) remain sealed along permanent seams (10), (12) and (14), but wherein envelope (4) now has an open top end (30).
대표청구항
▼
1. A moisture resistant flexible package for a moisture-activated chemical heater, comprising: an outer sheet;an inner sheet consisting of a rapidly quenched, low crystallinity polypropylene, wherein the inner sheet is substantially superposed and attached to the outer sheet along three contiguous s
1. A moisture resistant flexible package for a moisture-activated chemical heater, comprising: an outer sheet;an inner sheet consisting of a rapidly quenched, low crystallinity polypropylene, wherein the inner sheet is substantially superposed and attached to the outer sheet along three contiguous sides thereof forming permanent opposing side seams and a permanent bottom seam intermediate the permanent opposing side seams thus defining an elongated flexible envelope having an open top end opposite the permanent bottom seam,a fold defined by folding the envelope over on itself; andtemporary side seams formed by heat sealing the polypropylene inner sheet to itself; anda removable top seam intermediate the temporary side seams securing the envelope in a folded position to form a continuous moisture barrier surrounding a moisture activated chemical heater disposed in the envelope;wherein the heater can be opened for use by opening or removing the top seam and unfolding the envelope by opening the temporary side seams to provide the unfolded envelope, the outer and inner sheets remaining sealed along the permanent side seams and permanent bottom seam while allowing access inside the envelope via the open top end. 2. The moisture resistant flexible package of claim 1, wherein the outer and inner sheets exhibit less than or equal to about 0.05 grams of water moisture per 100 square inches material per 24 hours per day, when tested under ASTM E-96 with test conditions at about 100° F. and 90% relative humidity. 3. The moisture resistant flexible package of claim 1, wherein the outer sheet is made of one of: a polychlorotrifluoroethylene (PCTFE);a liquid crystal polymer (LCP);a cyclic olefin copolymer (COC);a vacuum deposited metallized polymer;a vacuum deposited dielectric coated polymer;a nanocomposite; anda polymer encapsulated aluminum foil core. 4. The moisture resistant flexible package of claim 3, wherein the nanocomposite includes a nanoclay containing polymer. 5. The moisture resistant flexible package of claim 3, wherein one layer of the encapsulating aluminum foil core includes: a biaxially oriented polyester film;a biaxially oriented polyamide film;a biaxially oriented polypropylene film; anda thermoplastic having substantially at least one of an amorphous coating and film from one of a polypropylene polymer group, a polyethylene polymer group, a polyethylene terephthalate polymer group, and a isophthalate polymer group. 6. The moisture resistant flexible package of claim 3, wherein one layer encapsulating aluminum foil core includes a thermoplastic having substantially at least one of an amorphous coating and film from coextruded multiple layers containing at least one layer of a polypropylene polymer. 7. The moisture resistant flexible package of claim 1, wherein the inner sheet is printed with one of alpha, numeric, and graphic instructions. 8. A heating apparatus, comprising: an outer sheet;an inner sheet consisting of a rapidly quenched, low crystallinity polypropylene, wherein the inner sheet is substantially superposed and attached to the first sheet along three contiguous sides thereof forming permanent opposing side seams and a permanent bottom seam intermediate the permanent opposing side seams thus defining an elongated flexible envelope having an open top end opposite the permanent bottom seam;a moisture-activated chemical heater disposed inside the envelope;a fold defined by folding the envelope over on itself and secured by temporary side seams formed by heat sealing the polypropylene inner sheet to itself; anda removable top seam intermediate the temporary side seams to form a continuous moisture barrier surrounding the moisture activated chemical heater;wherein access to the moisture activated chemical heater for use includes removing the top seam and unfolding the envelope about the fold by opening the temporary seals to provide the unfolded envelope, the outer and inner sheets remaining sealed along the permanent seams with access inside the envelope being allowed via the open top end. 9. The heater of claim 8, wherein the moisture activated chemical heater comprises: a heat-producing agglomerate, the heat-producing agglomerate comprising: one of particles of an acidic component selected from acid anhydrides, acid salts, and mixtures thereof, or particles of a basic component selected from bases, basic anhydrides, basic salts, and mixtures thereof, or a mixture of the acidic and basic components. 10. The heater of claim 9, wherein the heat-producing agglomerate has an axial crush strength of greater than or equal to 0.5 kilopond. 11. The moisture resistant flexible package of claim 1, wherein the temporary side seams are formed by heat sealing the polypropylene inner sheet to itself at a temperature of from 360° F. to 395° F., a seal head pressure of from 40 to 85 pounds per square inch, and a dwell time of 0.4 to 0.85 seconds. 12. The heating apparatus claim 8, wherein the temporary side seams are formed by heat sealing the polypropylene inner sheet to itself at a temperature of from 360° F. to 395° F., a seal head pressure of from 40 to 85 pounds per square inch, and a dwell time of 0.4 to 0.85 seconds.
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