IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0776665
(2001-02-05)
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발명자
/ 주소 |
- Ronald L. Cochran, II
- Mark B. Littlejohn
- Donald C. McCarthy
- Cristian M. Neculescu
- Robert Patterson
- Anthony J. Swiontek
|
출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
8 인용 특허 :
28 |
초록
▼
Low-odor microwaveable polypropylene/mica food contact articles are disclosed. The articles are prepared by low temperature processing and typically include odor-suppressing basic organic or inorganic compounds. Preferably, the articles are substantially free from C8 and C9 organic ketones associate
Low-odor microwaveable polypropylene/mica food contact articles are disclosed. The articles are prepared by low temperature processing and typically include odor-suppressing basic organic or inorganic compounds. Preferably, the articles are substantially free from C8 and C9 organic ketones associated with undesirable odors. Further improvements to the articles include crack-resistant embodiments with synergistic amounts of polyethylene and titanium dioxide.
대표청구항
▼
1. A process for forming a microwaveable, disposable, rigid and strong, mica and basic inorganic or basic organic compound filled polyolefin container having food contact compatible olfactory properties, said polyolefin being selected from the group consisting of polypropylene, polypropylene polyeth
1. A process for forming a microwaveable, disposable, rigid and strong, mica and basic inorganic or basic organic compound filled polyolefin container having food contact compatible olfactory properties, said polyolefin being selected from the group consisting of polypropylene, polypropylene polyethylene copolymer, a blend of polypropylene and polyethylene, and a mixture thereof wherein the basic inorganic or basic organic compound is selected from the group consisting of calcium carbonate, sodium carbonate, potassium carbonate, barium carbonate, sodium silicate, sodium borosilicate, magnesium oxide, strontium oxide, barium oxide, zeolites, sodium phosphate, potassium phosphate, magnesium phosphate, sodium stearate, calcium stearate, potassium stearate, sodium citrate, potassium citrate, hydroxides of these elements, and mixtures of these organic compounds, mixtures of silicon dioxide with one or more of the following oxides: magnesium oxide, calcium oxide, barium oxide, and mixtures of one or more of the basic inorganic or basic organic compounds set forth herein, comprising the steps of:(a) forming an extrudable admixture of the polyolefin resin, mica, and the basic inorganic compound or basic organic compound; (b) extruding said extrudable admixture of the polyolefin resin, mica, and the basic inorganic compound or the basic organic compound at elevated temperature; (c) passing the resulting extruded admixture of the polyolefin resin and mica and the basic inorganic compound or the basic organic compound through a multiple roll stack, at least one roll of said stack having a matte finish; (d) thermoforming said extruded admixture of the polyolefin, resin, mica, and the basic inorganic compound or organic compound; and (e) recovering a container having a micronodular surface and exhibiting a melting point of no less than 250.degree. F., said container being dimensionally stable and resistant to grease, sugar, and water at temperatures up to about 220.degree. F. and said container being resistant to cutting by serrated flatware wherein the amount of the basic inorganic compound or basic organic compound added reduces carbonyl moiety containing decomposition products to provide containers with suitable food contact compatible olfactory properties.
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