Non-crosslinked polyethylene foam
AssigneeTosoh Corporation
InventorShigehiko Abe
Life of this patent
Estimating the term…
Abstract
A non-crosslinked polyethylene foam is disclosed, which is obtained by foaming a polyethylene resin satisfying the following requirements (a) to (d): (a) a density is 890-980 kg/m3; (b) the number of long chain branches having 6 or more carbon atoms is 0.01-3 per 1,000 carbon atoms; (c) a melt tension (mN) measured at 190° C. (MS190) and MFR (melt flow rate: g/10 min, 190° C.) under a load of 2.16 kg are satisfied with the following formula (1): MS190>22×MFR−088 (1) and a melt tension (mN) measured at 160° C. (MS160) and MFR (melt flow rate: g/10 min, 190° C.) under a load of 2.16 kg are satisfied with the following formula (2): MS160>110−110×log (MFR) (2) (d) an endothermic curve obtained in temperature-rise measurement by a differential scanning calorimeter shows one peak.
Claims6
A non-crosslinked polyethylene foam obtained by foaming a polyethylene resin satisfying the following requirements (a) to (d):
- (a) a density is 890-980 kg/m3;
- (b) the number of long chain branches having 6 or more carbon atoms is 0.01-3 per 1,000 carbon atoms;
- (c) a melt tension (mN) measured at 190° C. (MS190) and MFR (melt flow rate:
- g/10 min, 190° C.) under a load of 2.16 kg are satisfied with the following formula (1):
- MS190>22×MFR−0.88 (1)
- and a melt tension (mN) measured at 160° C. (MS160) and MFR (melt flow rate:
- g/10 min, 190° C.) under a load of 2.16 kg are satisfied with the following formula (2):
- MS160>110−110×log (MFR) (2)
- (d) an endothermic curve obtained in temperature-rise measurement by a differential scanning calorimeter shows one peak.
Dependencies are inferred from the claim text.