Sheet having air permeability, water disintegrability and water impermeability

Abstract

Disclosed is a laminated sheet having air permeability, water disintegrability and water impermeability. Specifically disclosed is a sheet having air permeability, water disintegrability and water impermeability, which comprises a base layer having air permeability and water disintegrability and a hydrophobic fine particle layer. The sheet is characterized in that the hydrophobic fine particle layer is arranged on the base layer and a surface of the hydrophobic fine particle layer has a fine recessed and projected structure that is configured by the lamination of hydrophobic fine particles, said surface of the hydrophobic fine particle layer being not in contact with the base layer.

Description

technical field [0001] The present invention relates to sheet materials having air permeability, hydrolysis and water impermeability. Background technique [0002] Current absorbent articles such as sanitary napkins, panty liners, and pads for incontinence contain non-hydrolyzable materials, so after use, they are discarded in trash cans installed in bathrooms. Discarded absorbent articles must be recycled and disposed of. However, when the used absorbent article is disposed of, if it is mistakenly flushed into the toilet bowl, it may clog the tubing of the toilet bowl. Therefore, an absorbent article made of a hydrolyzable material that can be flushed directly into a toilet after use is being studied. [0003] Patent Document 1 discloses a sanitary napkin comprising a topsheet, a bodily fluid absorber, and a backsheet comprising a water-disintegrable base material, a water-soluble resin layer, and a waterproof layer in this order from outside to inside. [0004] However,...

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Problems solved by technology

[0004] However, in the absorbent article disclosed in Patent Document 1, the water-soluble resin layer and the waterproof layer are laminated with the water-soluble resin layer inside, so the water-soluble resin layer acts as a barrier layer, and air permeability and moisture permeability cannot basically be realized. Very easy to cause stuffy

Moreover, since the rigidity of the absorbent article is increased by the water-soluble resin layer, the skin feel (texture) is not good

[0005] In addition, the absorbent article of Patent Document 1 has water repellency only on one surface of the hydrolyzable base material. Therefore, although the liquid from the water repellent layer side, such as bodily fluid absorbed by the absorbent body, can exhibit leak-proof performance, when the liquid When it diffuses from the side of the hydrolyzable substrate, for example, when sweat diffuses from the underwear side, the leak-proof property cannot be exerted

[0006] Furthermore, the absorbent article of Patent Document 1 is manufactured by applying a curable release agent to a water-soluble resin film and curing it, and therefore requires a water-soluble resin film bonding process, a release agent application process, and a release process. Mold agent curing process, etc., low production efficiency and high cost

[0007] Furthermore, in the absorbent article of Patent Document 1, when the release agent is cured, it is chemically bonded to the water-soluble resin, and the dissolution rate of the resin tends to slow down.

Therefore, the part integrated with the release agent is easily broken into pieces during hydrolysis and floats in the septic tank, which is a problem.

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