| 摘要 |
There is a need for degradable films, particularily in agricultural mulch applications. The present invention provides for films having a controlled life from 30 to 160 days. The film comprises photodegradable sheet material having a thickness from 0.1 to 10, preferably, from 0.2 to 5, most preferably from 0.3 to 1.0, mils and comprising a polyolefin sheet and from 50 to 1,000 parts per million of cerium salt of a C16-20 fatty acid and from 1,000 to 20,000 parts per million of titanium dioxide having a particle size less than 0.05 microns.
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