BIODEGRADABLE AGRICULTURAL FILM

A degradable plastic film for use as an agricultural mulch film comprises two longitudinal bands each adjacent to a respective longitudinal edge of the film, and a middle section between the bands. The bands and middle section contain degradants. In use, the bands along the edges of the mulch film a...

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Bibliographische Detailangaben
Hauptverfasser:	BACIU RADU, GHO JOSEPH G
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING AGRICULTURE ANIMAL HUSBANDRY BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPSOR SEAWEED FISHING FORESTRY HORTICULTURE HUMAN NECESSITIES HUNTING LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM PERFORMING OPERATIONS PEST REPELLANTS OR ATTRACTANTS PLANT GROWTH REGULATORS PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTSTHEREOF SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING TRAPPING WATERING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	A degradable plastic film for use as an agricultural mulch film comprises two longitudinal bands each adjacent to a respective longitudinal edge of the film, and a middle section between the bands. The bands and middle section contain degradants. In use, the bands along the edges of the mulch film are buried in the soil and the middle section is exposed to sunlight. By reason of different degradants in the bands and middle section respectively, or different levels of the same degradants, the entire film degrades by the time of the next cycle of cultivation. The film is produced by means of extrusion from two extruders through one circular die which has a die opening with one segment which receives resin with one degradant and another segment which receives resin with a second degradant. The extruded cylindrical film is blown and then slit longitudinally.