| 摘要 |
<p>PURPOSE:To obtain a packaging material capable of preventing occurrence of insect pests in grains during storage and providing observation of the contents from the outside, by constituting the packaging material of an at least partially light-transmitting plastic film containing a pearlescent pigment kneaded therein. CONSTITUTION:A packaging material consisting of an at least partially light- transmitting plastic film obtained by kneading 0.1-20wt% pearlescent pigment, e.g. titanium oxide-coated mica, basic lead carbonate, bismuth chloride, etc., therein. Although the titanium oxide-coated mica, basic lead carbonate, bismuth chloride, etc., are cited as the pearlescent pigment used, the titanium oxide- coated mica pigment prepared by coating the surface of scaly mica flakes with fine particulate titanium oxide is preferred because of no toxicity. Polyethylene is particularly preferred as the plastic material for forming the film. If the amount of the pearlescent pigment blended is too small, no effect is obtained. Conversely, it the amount is too much, the film becomes opaque. Thereby the amount within the range of 1-5wt% is particularly preferred.</p> |
