Process for preparation of water-proof sheets
AssigneeHiraoka & Co., Ltd.
InventorsTsutomu Obayashi, Shinobu Watanabe, Kazuhide Ino
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Abstract
Disclosed is a process for preparing a water-proof sheet by forming a polymer coating on both the surfaces of a fibrous substrate fabric. At first, the fibrous substrate fabric is treated with a water repellant, and both the surfaces are subjected to the low temperature plasma treatment or corona discharge treatment. Then, a polymer coating is formed on both the surfaces. According to this process, the peel strength of the polymer coating is improved and the water absorbing property is reduced substantially to zero. If an inorganic fiber substrate fabric is treated according to this process, the bending resistance is highly improved in the resulting water-proof sheet.
Claims11
A process for the preparation of water-proof sheets from textile fibers which have been formed into a fabric, through the use of weaving, knitting or non-woven fabric forming techniques, the process comprising the steps of forming a polymer coating on both the surfaces of a fibrous fabric substrate, wherein the fibrous substrate is first treated with a water repellant, both the surfaces of the fabric are subjected to low temperture plasma treatment, and a polymer coating is then formed on both the surfaces of the fabric.
Dependencies are inferred from the claim text.