| 摘要 |
PURPOSE:To obtain a lid for a refrigerated container, which has no forming strain, such as warping, and bears a high impact strength at low temperature, by forming the lid by injection forming with a forming material for which a straight chain low density polyethylene with a specific density is mixed with a polypropylene with a specific mixing ratio. CONSTITUTION:Using a forming material, for which a straight chain low density polyethylene with a density of 0.915-0.9359/cm<3> is mixed with polypropylene; a lid for refrigerated container 1 is formed by injection forming. At this time, the mixing ratio for the polypropylene is made 10-25weight% to the total weight. By doing this, a lid which is flat, without warp, and with a high impact strength under low temperature can be obtained. The maximum effect is demonstrated when the lid 1 with a surface area larger than 100cm<3> and thickness smaller than 1.0mm and being flat is formed. |
