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一种可生物降解的农用薄膜

广东省科技图书馆(汇编整理) 2017/9/7 16:34:29
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BIODEGRADABLE AGRICULTURAL FILM 摘要: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. 摘要(翻译):一种可降解塑料膜用于使用作为农用地膜包括两个纵向带的每个相邻对的各自该膜的纵向边缘,和带之间的中间部分。该条带和中间段含有degradants。在使用,该覆盖膜的所述带沿着该边缘被埋在土壤和中间部分是暴露于阳光。通过不同的原因degradants在所述带和中间段分别,或不同的所述相同的水平degradants; 整个薄膜的降解通过该栽培的下一个周期的时间。所产生的膜是通过挤压从两个挤出机的装置通过一个圆形模具,其具有一模具开口与一个段,它接收树脂与一种降解剂和另一个段,它接收树脂与第二降解剂。所挤出的圆柱形膜为吹和然后狭缝的纵向。 公开(公告)号:US20090056209A1 公开(公告)日:2009-03-05 申请号:US11846448 申请日:2007-08-28 申请人:EPI ENVIRONMENTAL TECHNOLOGIES (NEVADA) INC

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