Title: Heat and grease resistant containers comprising poly (p-methylstyrene)

Abstract: There are provided shaped articles, such as trays and food containers, thermoformed from oriented poly (p-methylstyrene) sheet, oriented foamed poly (p-methylstyrene) film with oriented poly (p-methylstyrene) foam or polystyrene foam, that have been cross-linked by exposure to radiation. Such articles are resistant to fats and fatty foods contained therein can be placed in microwave ovens without destruction by hot, melted fats. The articles can also withstand conventional oven temperatures.

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Inventors: Canterino, Peter J. (Towaco, NJ, US)
Arbit, Harold A. (Highland Park, NJ, US)

Application Number: 961353
Filing Date: 1978-11-16
Publication_date: 1980-05-27
Assignee: Mobil Oil Corporation (New York, NY)
Primary Class(es): 428/319.7 264/53, 264/321, 264/DIG18, 426/127, 426/129, 426/234, 428/36.5, 428/910, 521/50.5, 521/79, 521/146, 521/915, 522/160, 526/347.1
Other Classes:
US Patent Ref:

2857625	Oct, 1958	Carlso, Jr.	521/79.
3060513	Oct, 1962	Klink et al.	521/915.
3242238	Mar, 1966	Edberg et al.	521/915.
3331899	Jul, 1967	Immel	521/915.
3515615	Jun, 1970	Okada et al.	204/159.
3640913	Feb, 1972	Cerra	521/915.
3725317	Apr, 1973	Roden et al.	521/79.
3832312	Aug, 1974	Wright	204/159.
4085073	Apr, 1978	Suh et al.	521/79.

Other Refs:
Primary Examiner: Foelak, Morton
Assistant Examiner:
Attorney: Huggett; Charles A., Trigg; Hastings S.