Douglas Michael Trenchard;Robert Charles Trenchard
发明人:
Douglas Michael Trenchard,Robert Charles Trenchard
申请号：
US15544477
公开号：
US20180220597A1
申请日:
2016.08.02
申请国别(地区):
US
年份:
2018
代理人:
摘要：
A solar-reactive agricultural mulch film including a sheet of heat-shrink material having one or more layers and uniform thickness, formed by a mechanical process. The process includes elongating the sheet, in a longitudinal direction, evenly across a width of the sheet, while the sheet is at a stretching temperature to pre-strain the sheet evenly across the width, and yields the solar-reactive agricultural mulch film having the uniform thickness throughout and being configured to, in operation, shrink when an exposure temperature of the material is elevated, by exposure to solar energy, to a shrinking temperature. The process may include elevating the sheet to an above-ambient stretching temperature for the elongating, or elongating the sheet at an ambient temperature.
