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US 6,635,206 B1Granted
Method of manufacturing improved corn zein resin films, sheets, and articles
AssigneeThe Board of Trustees of the University of Illinois
InventorsGraciela Wild Padua, Andrianaivo Maherisoa Rakotonirainy, Toan Thanh Ha
Life of this patent
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Abstract
A method of manufacturing sheets, films, and articles of manufacture from a corn zein resin. A wet corn zein resin is formed including corn zein and a fatty acid, and the wet zein resin is cold rolled into sheets. The sheets are dried, and the dried zein resin is processed to form sheets, films, and/or articles of manufacture.
Claims28
A method of manufacturing a corn zein resin article comprising:
- (a) forming a wet corn zein resin comprising:
- (i) corn zein, and
- (ii) about 20 to about 100 parts by weight of a fatty acid, per 100 weight parts of the corn zein;
- (b) cold rolling the wet zein resin to provide a wet zein sheet of a predetermined thickness,
- (c) drying the wet zein resin sheet at a temperature of about 40° C. to about 90° C. and a relative humidity of about 5% to about 20% to provide a dry zein resin;
- (d) optionally comminuting the dry zein resin to form particles of the dry zein;
- (e) extruding the dry zein resin of step (c) or step (d) to form pellets of the dry zein resin;
- and
- (f) subjecting the dry zein resin pellets to a pressure and a temperature of about 80° C. to about 150° C. to provide a zein resin article.
6 more elements
A method of manufacturing a corn zein resin article comprising:
- (a) forming a wet corn zein resin comprising:
- (i) corn zein, and
- ii) about 20 to about 100 parts by weight of a fatty acid, per 100 weight parts of the corn zein;
- (b) cold rolling the wet zein resin to provide a wet zein resin sheet of a predetermined thickness;
- (c) drying the wet zein resin sheet at a temperature of about 40° C. to about 90° C. and a relative humidity of about 5% to about 20% to provide a dry zein resin;
- (d) optionally comminuting the dry zein resin to form particles of the dry zein;
- (e) subjecting the dry zein resin of step (c) or step (d) to heat and pressure to provide an article.
4 more elements
A method of manufacturing a corn zein resin sheet comprising:
- (a) forming a wet corn zein resin comprising:
- (i) corn zein, and
- (ii) about 20 to about 100 parts by weight of a fatty acid, per 100 weight parts of the corn zein;
- (b) cold rolling the wet zein resin to provide a wet zein resin sheet of a predetermined thickness;
- (c) drying the wet zein resin sheet at a temperature of about 40° C. to about 90° C. and a relative humidity of about 5% to about 20% to provide a dry zein resin;
- (d) optionally comminuting the dry zein resin to form particles of the dry zein resin;
- (e) molding the dry zein resin of step (c) or step (d) under heat and pressure to provide a zein resin sheet.
4 more elements
A method of manufacturing a corn zein resin article comprising:
- (a) forming a wet corn zein resin comprising:
- (i) corn zein, and
- (ii) about 20 to about 100 parts by weight of a fatty acid, per 100 weight parts of the corn zein;
- (b) cold rolling the wet zein resin to provide a wet zein film of a predetermined thickness,
- (c) drying the wet zein resin film at a temperature of about 40° C. to about 90° C. and a relative humidity of about 5 to about 20% to provide a dry zein resin film;
- (d) optionally comminuting the dry zein resin film to form particles of the dry zein resin;
- (e) heating the dry zein resin particles of step (c) or the zein resin film of step (d) at a sufficient temperature for a sufficient time to melt the dry zein resin particles and form a zein resin mass;
- (f) cold rolling the zein resin mass to provide a zein resin sheet of a predetermined thickness;
- and
- (g) subjecting the zein resin sheet to a temperature of about 60° C. to about 120° C. and to a pressure to provide the article.
7 more elements
A method of manufacturing a corn zein resin article comprising:
- (a) forming a wet corn zein resin comprising:
- (i) corn zein, and
- (ii) about 20 to about 100 parts by weight of a fatty acid, per 100 weight parts of the corn zein;
- (b) cold rolling the wet zein resin to provide a wet zein resin sheet of a predetermined thickness;
- (c) drying the wet zein resin sheet at a temperature of about 40° C. to about 90° C. and a relative humidity of about 5% to about 20% to provide a dry zein resin;
- (d) comminuting the dry zein resin to form particles of the dry zein;
- (e) forming the dry zein resin of step (d) under heat and pressure into an article.
4 more elements
A method of manufacturing a corn zein resin pellet comprising:
- (a) forming a wet corn zein resin comprising:
- (i) corn zein, and
- (ii) about 20 to about 100 parts by weight of a fatty acid, per 100 weight parts of the corn zein;
- (b) cold rolling the wet zein resin to provide a wet zein sheet of a predetermined thickness;
- (c) drying the wet zein resin sheet at a temperature of about 40° C. to about 90° C. and a relative humidity of about 5% to about 20% to provide a dry zein resin;
- (d) optionally comminuting the dry zein resin to form particles of the dry zein;
- (e) extruding the dry zein resin of step (c) or step (d) to form the pellet.
4 more elements
A method of forming a dry zein resin powder comprising:
- (a) forming a wet corn zein resin comprising:
- (i) corn zein, and
- (ii) about 20 to about 100 parts by weight of a fatty acid, per 100 weight parts of the corn zein;
- (b) cold rolling the wet zein resin to provide a wet zein sheet of a predetermined thickness;
- (c) drying the wet zein resin sheet at a temperature of about 40° C. to about 90° C. and a relative humidity of about 5% to about 20% to provide a dry zein resin;
- (d) comminuting the dry zein resin to form the dry zein resin powder.
3 more elements
A method of manufacturing a corn zein resin article comprising:
- (a) forming a wet corn zein resin comprising:
- (i) corn zein, and
- (ii) about 20 to about 100 parts by weight of a fatty acid, per 100 weight parts of the corn zein;
- (b) cold rolling the wet zein resin to provide a wet zein sheet of a predetermined thickness;
- (c) drying the wet zein resin sheet at a temperature of about 40° C. to about 90° C. and a relative humidity of about 5% to about 20% to provide a dry zein resin;
- (d) optionally comminuting the dry zein resin to form particles of the dry zein;
- (e) forming the dry zein resin of step (c) or step (d) into an article.
4 more elements
A method of manufacturing a corn zein resin sheet or film comprising:
- (a) forming a wet corn zein resin comprising:
- (i) corn zein, and
- (ii) about 20 to about 100 parts by weight of a fatty acid, per 100 weight parts of the corn zein;
- (b) cold rolling the wet zein resin to provide a wet zein sheet of a predetermined thickness;
- (c) drying the wet zein resin sheet at a temperature of about 40° C. to about 90° C. and a relative humidity of about 5% to about 20% to provide a dry zein resin;
- (d) optionally comminuting the dry zein resin to form particles of the dry zein;
- (e) forming the dry zein resin of step (c) or step (d) into the sheet or film.
4 more elements
A method of manufacturing a corn zein resin film comprising:
- (a) forming a wet corn zein resin comprising:
- (i) corn zein, and
- (ii) about 20 to about 100 parts by weight of a fatty acid, per 100 weight parts of the corn zein;
- (b) cold rolling the wet zein resin to provide a wet zein sheet of a predetermined thickness;
- (c) biaxially orienting the wet zein resin sheet;
- (d) forming the biaxially oriented sheet into the film.
3 more elements
Dependencies are inferred from the claim text.