IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0777512
(2001-02-06)
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발명자
/ 주소 |
- Hartmann, Mark Henry
- Magill, Monte Christopher
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출원인 / 주소 |
- Outlast Technologies, Inc.
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
35 인용 특허 :
139 |
초록
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A process for manufacturing extrudable/melt spinnable concentrate pellets which contain phase change materials (PCMs), whether the PCMs are micro-encapsulated absorbed into carrier polymers, or non-micro-encapsulated within the concentrate pellets. The polymer matrix within the concentrate pellets c
A process for manufacturing extrudable/melt spinnable concentrate pellets which contain phase change materials (PCMs), whether the PCMs are micro-encapsulated absorbed into carrier polymers, or non-micro-encapsulated within the concentrate pellets. The polymer matrix within the concentrate pellets can be any thermoplastic polymer or combination of thermoplastic polymers, and the concentrate pellets can then be blended into similar thermoplastic polymers to form mono-filament melt spun fibers, extruded films, injection molded products, etc., or the concentrate pellets can be blended with other thermoplastic polymers to form bi-component or multi-component melt spun fibers, extruded films, injection molded products, etc.
대표청구항
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1. A method of making polymer-based pellets that have utility in extrusion and melt spun manufacturing processes, comprising:melting a dispersing polymer to form a melt;adding a wet cake of a phase change material to said melt to form a dispersion;heating said dispersion to reduce a water content of
1. A method of making polymer-based pellets that have utility in extrusion and melt spun manufacturing processes, comprising:melting a dispersing polymer to form a melt;adding a wet cake of a phase change material to said melt to form a dispersion;heating said dispersion to reduce a water content of said dispersion;cooling said dispersion to form a solid; andprocessing said solid to form polymer-based pellets containing said phase change material. 2. The method of claim 1 wherein processing said solid includes:blending a thermoplastic polymer with said solid prior to forming said polymer-based pellets. 3. The method of claim 2 wherein said dispersing polymer is a low molecular weight polymer having an affinity for said phase change material, and wherein said thermoplastic polymer is a high molecular weight polymer having an affinity for said low molecular weight polymer. 4. The method of claim 2 wherein said dispersing polymer is a low molecular weight polymer, and wherein said thermoplastic polymer is a high molecular weight polymer selected from the group consisting of polyamides, polyamines, polyimides, polyacrylics, polycarbonates, polydienes, polyepoxides, polyesters, polyethers, polyflouocarbons, formaldehyde polymers, natural polymers, polyolefins, polyphenylenes, silicon containing polymers, polyurethanes, polyvinyls, polyacetals, and polyarylates. 5. The method of claim 1 wherein said polymer-based pellets each contain from about 10 to about 30 weight percent of said phase change material. 6. The method of claim 1 wherein said wet cake of said phase change includes from about 60 to about 70 weight percent of said phase change material. 7. The method of claim 1 wherein said dispersing polymer is a low molecular weight polymer. 8. The method of claim 1 wherein said dispersing polymer is a polyethylene homopolymer. 9. The method of claim 1 wherein said phase change material is an encapsulated phase change material. 10. The method of claim 1 wherein said phase change material is physically contained by a material selected from the group consisting of silica, fumed silica, and zeolite. 11. The method of claim 1 wherein processing said solid to form said polymer-based pellets includes an extrusion step. 12. The method of claim 1 wherein heating said dispersion includes heating said dispersion until said water content of said dispersion is less than about 0.15 weight percent. 13. The method of claim 12 wherein said polymer-based pellets each contain from about 15 to about 25 weight percent of said phase change material. 14. A method of manufacturing polymer-based pellets that are useable in extrusion and melt spun processes to form plastic articles, comprising:providing phase change material;providing a low molecular weight polymer having an affinity for said phase change material;providing a high molecular weight polymer having an affinity for said low molecular weight polymer and having physical characteristics compatible with an intended use of said plastic articles;melting said low molecular weight polymer to form a first melt;generally uniformly blending said phase change material into said first melt to form a first blend;cooling said first blend to form a first solid;processing said first solid to form granules;melting said high molecular weight polymer to form a second melt;generally uniformly blending said granules into said second melt to form a second blend;cooling said second blend to form a second solid; andprocessing said second solid to form said polymer-based pellets. 15. The method of claim 14 wherein said polymer-based pellets each contain from about 10 to about 30 weight percent of said phase change material. 16. The method of claim 14 wherein:said low molecular weight polymer is selected from the group consisting polyethylene, polypropylene, Nylon 12, polybutylene terephthalate, polyethylene-co-vinyl acetate, polyethylene-co-acrylic acid, polybutylene terphthalate-co-polytetramethylene terephthalate, and polylauryllactam-block-polytetrahydrofuran; andsaid high molecular weight polymer is selected from the group consisting of polyamides, polyamines, polyimides, polyacrylics-, polycarbonates, polydienes, polyepoxides, polyesters, polyethers, polyflourocarbons, formaldehyde polymers, natural polymers, polyolefins, polyphenylenes, silicon containing polymers, polyurethanes, polyvinyls, polyacetals, and polyarylates. 17. The method of claim 14 wherein said phase change material is an encapsulated phase change material. 18. The method of claim 14 wherein said phase change material is physically confined to a plurality of physical volumes by a material selected from the group consisting of silica, fumed silica, and zeolite. 19. The method of claim 14 wherein processing said first solid and processing said second solid each include an extrusion step. 20. The method of claim 14 wherein blending said phase change material into said first melt includes adding a wet cake of said phase change material to said first melt to form said first blend, and the method further comprises heating said first blend until a water content of said first blend is reduced to less than about 0.15 weight percent. 21. The method of claim 20 wherein said polymer-based pellets each contain from about 15 to about 25 weight percent of said phase change material. 22. The method of claim 14 wherein said phase change material is microencapsulated within a plurality of hollow shells, and wherein said low molecular weight polymer includes a constituent having an affinity for said hollow shells. 23. The method of claim 14 wherein said phase change material is encased in a plurality of nylon shells, and wherein said low molecular weight polymer includes a nylon constituent. 24. The method of claim 14 wherein blending said phase change material into said first melt includes adding a water-based form of said phase change material to said first melt to form said first blend, and the method further comprises heating said first blend until a water content of said first blend is generally eliminated. 25. The method of claim 24 wherein said water-based form of said phase change material is a wet cake of said phase change material. 26. The method of claim 25 wherein said wet cake of said phase change includes from about 60 to about 70 weight percent of said phase change material. 27. A method of manufacturing polymer-based pellets that are useable in an extrusion/melt spun process to produce synthetic fibers, comprising:providing a water-based form of a phase change material;providing a low molecular weight polymer having an affinity for said phase change material;providing a high molecular weight polymer having an affinity for said low molecular weight polymer and having physical characteristics compatible with an intended use of said synthetic fibers;melting said low molecular weight polymer to form a first melt;blending said water-based form of said phase change material into said first melt to form a first blend;heating said first blend until a water content of said first blend is generally eliminated;cooling said first blend to form a first solid;physically processing said first solid to form granules;melting said high molecular weight polymer to form a second melt;generally uniformly blending said granules into said second melt to form a second blend;cooling said second blend to form a second solid; andphysically processing said second solid to form said polymer-based pellets. 28. The method of claim 27 wherein said polymer-based pellets each contain from about 10 to about 30 weight percent of said phase change material. 29. The method of claim 27 wherein said phase change material is encapsulated within a plurality of hollow shells, and wherein said low molecular weight polymer has an affinity for said hollow shells. 30. The method of claim 27 wherein physically processing said first solid and physically processing said second solid each includes an extrusion step follow ed by a pulverizing step. 31. The method of claim 27 wherein heating said first blend includes heating said first blend until said water content of said first blend is reduced to less than about 0.15 weight percent. 32. The method of claim 27 wherein said water-based form of said phase change is a wet cake of said phase change material. 33. The method of claim 32 wherein said wet cake of said phase change includes from about 1 to about 90 weight percent of said phase change material.
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