| 摘要 |
The present invention provides a process for production of expansion-molded articles of a linear low density polyethylene resin in a mold which comprises compressing pre-expanded linear low density polyethylene resin beads having two melting points (measured by differential scanning calorimetry) and having a ratio: 5%</= AH /AL x 100% </=80% using a pressurized gas, filling a mold capable of closing but incapable of sealing with said compressed beads, then venting said mold and heating and fusing the beads with steam, wherein the compression rate of the pre-expanded beads immediately before said heating with steam to the original pre-expanded beads is maintained at 5 to 60% (AL being the peak fusion area at the melting point at the low temperature side (TML) and AH being the peak fusion area at the melting point at the high temperature side (TMH)). According to the present invention, molded articles of linear low density polyethylene having a minimized dimensional shrinkage rate (good dimensional accuracy) and excellent fusion rate and surface appearance can be produced in high productivity. |
