The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 29, 1986
Filed:
Apr. 02, 1985
Yoshimasa Fujimoto, Hamamatsu, JP;
Hirotoshi Miyazaki, Ibaraki, JP;
Mitsui Petrochemical Industries, Ltd., Tokyo, JP;
Tokyo Serofan Co., Ltd., Tokyo, JP;
Abstract
A water-absorbing laminate comprising a water-absorbing film and a non-woven fabric, in which the water-absorbing film is formed by film-forming a mixture of (A) a water-soluble polymer containing, as the monomer component, at least 40 mole % of an .alpha.,.beta.-unsaturated compound containing one or two carboxyl groups or groups from which a carboxyl group can be easily derived and in which 5% to 50% of the carboxyl groups and/or groups from which a carboxyl group can be easily derived are in the form of a salt, and (B) polyvinyl alcohol in a weight ratio of (A)/(B) of not less than 1/99 to less than 1/9. This water-absorbing can be produced by laminating the water-absorbing film on the non-woven fabric under pressure either in a hydrous and heat-softened state of the film or through an adhesive and, optionally, heat-treating the resultant laminate. This water-absorbing laminate can avoid the formation of excessive moisture and prevent waterdrops from dropping while keeping the heat-retaining properties, when used as a sheet for a cover culture. As a result, the occurrence of disease in the plants under culture and any reduction in the yield and quality of the plants are effectively prevented.