Ultra-thin absorbing sheet body, disposable absorbent article provided with ultra-thin absorbing sheet body and production device for ultra-thin absorbing sheet body

An ultra-thin absorbent sheet member in which an absorbent polymer powder is adhered between a first and a second nonwoven fabrics by a first and a second hotmelt adhesive layers such that an absorbent polymer powder present area and an absorbent polymer powder absent area exist, wherein:

• the absorbent polymer powder absent area is present at opposite widthwise end portions of the ultra-thin absorbent sheet member and at least one location between the opposite end portions,
• the first hotmelt adhesive layer is formed at an upper side of the first nonwoven fabric and at a lower side of the absorbent polymer powder,
• the second hotmelt adhesive layer is so formed at a lower side of the second nonwoven fabric as to cover at least an upper side of the absorbent polymer powder present area, and
• the first and second hotmelt adhesive layers are both made of an aggregate of linear hotmelt adhesive pieces.

An apparatus for producing an ultra-thin absorbent sheet member, comprising:

• a running device for continuously running a first nonwoven fabric having a specified width in lengthwise direction,
• a first hotmelt adhesive applicator for continuously applying a first hotmelt adhesive to the upper surface of the running nonwoven fabric except absorbent polymer powder absent areas at opposite widthwise end portions and an absorbent polymer powder absent area located at least at one location between the opposite widthwise end portions while defining clearances,
• an absorbent polymer powder feeding device for continuously feeding an absorbent polymer powder to the upper surface of the running first nonwoven fabric to adhere the absorbent polymer powder to the first hotmelt adhesive, and
• a second hotmelt adhesive applicator for continuously applying a second hotmelt adhesive to the upper surface of the running first nonwoven fabric over the entire width while defining clearances.

An apparatus for producing an ultra-thin absorbent sheet member, comprising:

• a running device for continuously running a first nonwoven fabric having a specified width in lengthwise direction,
• a first hotmelt adhesive applicator for continuously applying a first hotmelt adhesive to the upper surface of the running first nonwoven fabric except absorbent polymer powder absent areas at opposite widthwise end portions and an absorbent polymer powder absent area located at least at one location between the opposite widthwise end portions while defining clearances,
• an absorbent polymer powder feeding device for continuously feeding an absorbent polymer powder to the upper surface of the running first nonwoven fabric to adhere the absorbent polymer powder to the first hotmelt adhesive,
• a running device for continuously running a second nonwoven fabric having a specified width in lengthwise direction,
• a second hotmelt adhesive applicator for continuously applying a second hotmelt adhesive to the upper surface of the running second nonwoven fabric over the entire width while defining clearances, and
• a bonding device for aligning the upper surface of the running first nonwoven fabric and that of the running second nonwoven fabric with respect to widthwise direction and bonding them in the absorbent polymer powder absent areas at opposite widthwise end portions and in the absorbent polymer powder absent area located at least at one location between the opposite widthwise end portions.