Water-disintegrable sheet and pouch made of the same for excreta-holding wear
AssigneeAlcare Co., Ltd.
InventorMakoto Sato
Life of this patent
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Abstract
A water-degradable sheet undergoes biodegradation and prevents drainage facilities (e.g., a sewage treatment tank) from clogging. The sheet includes a water-degradable substrate and a water-resistant layer, along with an enzyme that acts to decompose the substrate. The water-degradable sheet can reconcile water resistance with water solubility. The water-degradable sheet dissolves in water after immersion in water. The water-resistant layer can also contain a biodegradable substrate. An excretion receptacle having a pouch that includes the water-degradable sheet is also provided.
Claims14
A water-degradable sheet, comprising:
- a water-degradable substrate;
- and
- an enzyme that acts to decompose the water-degradable substrate,
- wherein,
- the water-degradable substrate comprises an easily water-degradable layer and a water-resistant layer that is less easily water-degradable than the water-degradable layer, and
- the water-resistant layer comprises a biodegradable resin comprising one or more polymer selected from the group consisting of:
- polycaprolactone, polylactic acid-based resin, polybutylene succinate and polybutylene succinate adipate.
A disposable sheet, comprising:
- (i) a water-degradable layer comprising water-degradable paper, water-degradable resin or a mixture thereof;
- and
- (ii) a biodegradable layer comprising (a) a mixture of polysaccharide, protein, and biodegradable resin, and (b) amylase and protease enzymes that is are active on the biodegradable layer, said biodegradable layer formed on one side of the water-degradable layer,
- wherein the biodegradable layer is more water-resistant than the water-degradable layer.
Dependencies are inferred from the claim text.