|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||264/51 ; 521/79 ; 521/97 ; 521/146|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 18 인용 특허 : 0|
A polystyrene resin in foam form having a basis weight of less than about 20 g/100 in2 and a density of about 6 lbs./ft3 or less, the foam precursor of which is either a polystyrene having a melt index of about 8 or more or a polystyrene in combination with a minor proportion of any other material which will result in a melt index of about 8 or more. A method of forming such a polystyrene resin foam structure includes combining the resin in molten form under pressure with the blowing agent of at least approximately 100% carbon dioxide and extruding the m...
In a method for forming foamed polystyrene the improvement consisting of employing polystyrene resin or a polystyrene resin composition having a melt index of about 8 or more as the foam precursor and defining the foam cell structure by employing at least approximately 100% carbon dioxide to yield a foam structure having a basis weight of less than 20 gms/100 in2 and a density of about 6 lbs/ft3 or less.