| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a polypropylene-based resin foamed sheet having excellent foaming extrudability, and having beautiful appearance without attachment of scams, and further to provide a foamed container hardly causing a roughened surface such as blister when carrying out the thermoforming, and having heat resistance resisting to the use in a microwave oven heating. SOLUTION: The formation or the like of the scams is extremely reduced by using a resin composition comprising 75-90 pts.wt. propylene-based resin having a high melt tension of 20-35 cN melt tension, and 10-25 pts.wt. linear crystalline polypropylene-based resin, as raw materials, and the formed container having extremely reduced roughened surface such as blister formed at thermoforming of the sheet, and having excellent characteristics such as heat resistance to the microwave oven heating can be stably produced. More superior sheet and formed container can be obtained by using the propylene-based resin with the high melt tension, having specific characteristics such as an MFR, a melting peak temperature, and a semi-crystallizing time.</p> |
