| 摘要 |
<p>The invention relates to synthetic resin, especially polyethylene or polypropylene composition having adsorptive effect, optionally processed to packaging film, wherein the synthetic resin contains 0.5-20 % of Na-A or 4A zeolite (calculated for the weight of the synthetic resin) ion-exchanged with calcium. Average particle size of the zeolite used is 4-5 νm. The mixture is activated under reduced pressure below the heat-decomposition temperature during extrusion. Furthermore, the invention relates to a process for the preparation of the synthetic resin (plastic), especially polyethylene or polypropylene composition having adsorptive effect. The products packaged in a bag or sack prepared from the synthetic resin composition of the invention are better protected and preserved than those packaged in control bags or sacks.</p> |
