A method of making a microwave energy interactive structure includes plasma treating the surface of a polymer film with an inert gas at a plasma treatment energy per unit surface area of the film of from about 0.005 J/cm2 to about 0.2 J/cm2 to reduce the apparent surface roughness of film the polyme
A method of making a microwave energy interactive structure includes plasma treating the surface of a polymer film with an inert gas at a plasma treatment energy per unit surface area of the film of from about 0.005 J/cm2 to about 0.2 J/cm2 to reduce the apparent surface roughness of film the polymer film, and depositing a layer of microwave energy interactive material onto the plasma treated surface of the film.
대표청구항▼
1. A method of making a microwave energy interactive structure, comprising: providing a polymer film, wherein the polymer film comprises polyethylene terephthalate;plasma treating the surface of the polymer film with a plasma treatment gas comprising at least one of nitrogen and argon, wherein plasm
1. A method of making a microwave energy interactive structure, comprising: providing a polymer film, wherein the polymer film comprises polyethylene terephthalate;plasma treating the surface of the polymer film with a plasma treatment gas comprising at least one of nitrogen and argon, wherein plasma treating the surface of the polymer film comprises exposing the surface of the polymer film to the plasma treatment gas at a plasma energy per unit surface area of less than about 0.2 J/cm2; andthereafter depositing a layer of microwave energy interactive material onto the plasma treated surface of the polymer film in a chamber having a pressure of less than about 5×10−4 torr, wherein the layer of microwave energy interactive material is operative for converting at least a portion of impinging microwave energy into thermal energy. 2. The method of claim 1, wherein plasma treating the surface of the polymer film comprises exposing the surface of the polymer film to the plasma treatment gas at a plasma energy per unit surface area of less than about 0.1 J/cm2. 3. The method of claim 1, wherein plasma treating the surface of the polymer film comprises exposing the surface of the polymer film to the plasma treatment gas at a plasma energy per unit surface area of less than about 0.05 J/cm2. 4. The method of claim 1, wherein the polymer film is exposed to the plasma treatment gas for less than about 3 ms. 5. A method of making a microwave energy interactive structure, comprising: providing a polymer film, wherein the polymer film has a surface with an apparent surface roughness;plasma treating the surface of the polymer film with a plasma treatment gas at a plasma treatment energy per unit surface area of the polymer film of from about 0.005 J/cm2 to about 0.2 J/cm2, wherein plasma treating the surface of the polymer film reduces the apparent surface roughness of the surface of the polymer film; anddepositing a layer of microwave energy interactive material onto the surface of the polymer film, wherein the layer of microwave energy interactive material is operative for converting at least a portion of impinging microwave energy into thermal energy. 6. The method of claim 5, wherein the plasma treatment gas comprises at least one of argon or nitrogen, andthe plasma treatment energy per unit surface area of the polymer film is from about 0.01 J/cm2 to about 0.1 J/cm2. 7. The method of claim 5, wherein the apparent surface roughness of the polymer film is at least partially attributable to surface features having an aspect ratio of at least about 5:1, and plasma treating the surface of polymer film reduces the height of the surface features. 8. The method of claim 5, wherein plasma treating the surface of the polymer film reduces the apparent surface roughness of the polymer film about 20% to about 50%. 9. The method of claim 5, wherein plasma treating the surface of the polymer film reduces the apparent surface roughness of the polymer film about 25% to about 35%. 10. The method of claim 5, further comprising joining a support layer to the layer of microwave energy interactive material such that the layer of microwave energy interactive material is disposed between the polymer film and the support layer. 11. The method of claim 10, wherein the support layer comprises paper, paperboard, or any combination thereof. 12. A method of making a microwave energy interactive structure, comprising: plasma treating a surface of a polymer film at a plasma energy per unit surface area of less than about 0.2 J/cm2 with an exposure time of less than about 3 ms, wherein the surface of the polymer film has a topography defined at least partially by surface structures;depositing a layer of microwave energy interactive material onto the plasma treated surface of the polymer film to form a susceptor film, wherein a total perimeter of surface structures within a square sample area divided by an edge length of the square sample area defines a PEL value of the susceptor film, andplasma treating the surface of the polymer film reduces the PEL value of the susceptor film; and joining the susceptor film to a dimensionally stable substrate to form the microwave energy interactive structure,wherein the layer of microwave energy interactive material is operative for converting microwave energy into thermal energy so that the susceptor film heats to a maximum temperature, andreducing the PEL value of the susceptor film by plasma treating the surface of the polymer film increases the maximum temperature of the susceptor film when exposed to microwave energy. 13. The method of claim 12, further comprising positioning a food item having a surface that is desirably at least one of browned and crisped so that the surface of the food item is proximate to the susceptor film of the microwave energy interactive structure, andexposing the food item and microwave energy interactive structure to microwave energy so that the layer of microwave energy interactive material converts at least a portion of the microwave energy into thermal energy and at least one of browns and crisps the surface of the food item,wherein the microwave energy interactive structure at least one of browns and crisps the surface of the food item to a greater extent relative to the microwave energy interactive structure without plasma treating the polymer film. 14. A method of making a microwave energy interactive structure, comprising: plasma treating a surface of a polymer film under vacuum using an inert gas at a plasma energy per unit surface area of less than about 0.2 J/cm2, wherein the surface of the polymer film has an apparent surface roughness defined at least partially by surface structures having various heights; andthereafter depositing a layer of microwave energy interactive material onto the plasma treated surface of the polymer film to form a susceptor film,wherein a total perimeter of surface structures within a square sample area divided by an edge length of the square sample area defines a PEL value of the susceptor film, andplasma treating the surface of the polymer film reduces the height of at least some of the surface structures at least about 20%, so that the PEL value of the susceptor film is reduced from a first PEL value to a second PEL value, andwherein the layer of microwave energy interactive material is operative for converting microwave energy into heat so that the susceptor film reaches a maximum temperature, andthe maximum temperature of the susceptor film is greater for the susceptor film having the second PEL value than for a susceptor film having the first PEL value.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (50)
Neilson Zeng CA; Laurence Lai CA; Anthony Russell CA, Abuse-tolerant metallic packaging materials for microwave cooking.
Wendt Dan J. (Lino Lakes MN) Kemske Jonathon D. (New Brighton MN) Pesheck Peter S. (Brooklyn Center MN), Apparatus for heating a food item in a microwave oven having heater regions in combination with a reflective lattice str.
Rudd, David; Ruf, Brenda, Biaxally-oriented polypropylene films containing a non-crystallizable, amorphous polyester layer, and method of making the same.
Pecorini, Thomas Joseph; McWilliams, Douglas Stephens; Gilliam, Spencer Allen; Tincher, Mark Elliott; Tanner, Candace Michele, Biaxially oriented copolyester film and laminates thereof.
Pruett Wayne P. (Kingsport TN) Ramsey Charles W. (Blountville TN) Webb Sarah J. (Gray TN) Carico Joey C. (Kingsport TN), Films and containers of heat resistant copolyesters.
Xu Liming (9107 Autoville Dr. College Park MD 20740), Material for converting microwave energy into thermal energy, and a cooking receptacle fabricated from that material.
Murschall, Ursula; Kern, Ulrich; Crass, Guenther, Matt, UV-stable, Thermoformable, co-extruded polyester film, a method for the production thereof and the use of the same.
Winters William C. (Bloomington MN) Chang Hsien-Hsin (Minneapolis MN) Anderson George R. (Minneapolis MN) Easter Ross A. (Minneapolis MN) Sholl Jeffrey J. (New Brighton MN), Microwave heating package, method and susceptor composition.
Brandberg Lawrence C. (Minneapolis MN) Hanson Denise E. (Elk River MN) Watkins Jeffrey T. (St. Paul MN), Microwave susceptor with attenuator for heat control.
Kane William Paul (Bon Air VA), Polyethylene terephthalate/paperboard laminate and method of making it, container blank formed from such laminate and co.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.