US 8,557,068 B2Granted

Method for manufacturing an absorbent body of a body fluid absorbing article

AssigneeDaio Paper Corporation

InventorsYosuke Mori, Kazunori Ito

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Abstract

A method for manufacturing an absorbent body of a body fluid absorbing article. The absorbent body includes an air laid absorbent fiber having a dispersed and thin layer of a mixed absorbent fiber and super absorbent polymer. The method involves using multiple stages having multiple dispersing chutes and pressing rolls spaced out in a transfer direction to accumulate and form the absorbent fiber and the super absorbent polymer while disentangling and mixing the absorbent fiber and the super absorbent polymer in accordance with an air laying method in which the absorbent fiber and the super absorbent polymer are conveyed in an air flow and injected by the dispersing chutes to provide the dispersed layer of the mixed absorbent fiber and super absorbent polymer, and thin the air laid absorbent fiber, by pressurization, by using the pressing rolls to thin the dispersed layer.

Claims3

Dependent claims

A method for manufacturing an absorbent body of a body fluid absorbing article, the absorbent body comprising an air laid absorbent fiber having a dispersed and thin layer of a mixed absorbent fiber and super absorbent polymer, the method comprising the steps of:

(i) conveying an the absorbent fiber and a super absorbent polymer in an air flow into multiple dispersing chutes;
(ii) ejecting at the same time the absorbent fiber and the super absorbent polymer from multiple dispersing chutes onto an endless air-permeable conveyor belt;
(iii) applying an air sucking action on the absorbent fiber and the super absorbent polymer, while the absorbent fiber and the super absorbent polymer are disentangled and mixed to accumulate the absorbent fiber and the super absorbent fiber to form a web on said conveyor belt, said conveyor belt having a plurality of recess portions on the periphery thereof such that the air sucking action and accumulation are performed so as to allow only the inside of said recess portions to be of an air permeable structure;
(iv) transferring the web from said conveyor belt to opposing heating and pressing rolls;
(v) thinning the web by application of the opposing heating and pressing rolls against the web to produce an air laid absorbent body sheet;
and
(vi) winding the air laid absorbent body sheet on a winding roll.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/803,996Filed 12 Jul 2010 · division
Priority: JP 2000-3741918 Dec 2000
Published: US 2010/0326580 A130 Dec 2010
Granted: 15 Oct 2013
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

A61F 13/49011
With elastic means: the elastic means is located at the waist region
A61F 13/15756
Apparatus or processes for manufacturing: applying tabs, strips, tapes, loops; Knotting the ends of pads
A61F 13/49019
With elastic means: the elastic means being placed longitudinally, transversely or diagonally over the article
A61F 13/532
Having a homogeneous composition through the thickness of the pad: inhomogeneous in the plane of the pad

Family

PCT/JP01/10740Parent of this division · filed 12 Jul 2001
US 2010/0326580 A1Pre-grant publication · published 30 Dec 2010
Application10/433,725Parent of this division
US 2004/0015144 A1Published application
US 8,557,068 B2This patent

From the US filing history. Foreign family members aren’t listed.