The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 31, 1994
Filed:
Jul. 02, 1992
Kouji Kubo, Chiba, JP;
Shigeichi Kobayashi, Chiba, JP;
Sumitomo Chemical Company, Limited, Osaka, JP;
Abstract
Wallpaper comprising flame retardant paper having laminated thereon an expanded sheet is disclosed, in which the expanded sheet is obtained by expanding at an expansion ratio of 1.5 or more a resin composition containing (A) 100 parts by weight of an ethylene-.alpha.-olefin copolymer having a melt flow rate of from 0.2 to 50 g/10 min, a density of not more than 0.91 g/cm.sup.3, and a maximum melting peak temperature of 100.degree. C. or higher and a heat of fusion at 100.degree. C. or higher of 10 J/g or more as measured with a differential scanning calorimeter and (B) 60 parts by weight or more of magnesium hydroxide or a mixture of magnesium hydroxide and aluminum hydroxide at a weight ratio of from 100/0 to 20/80. The wallpaper has high safety, is free from bleeding of a plasticizer, gives off no offensive odor, and satisfies the requirements of 2nd class (semi-noncombustible) of fireproof wall coverings.