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An apparatus and method for forming air-laid absorbent cores

An air-laid, absorbent core technology, applied in chemical instruments and methods, absorbent pads, applications, etc., can solve the problems of increased risk of SAP particle loss, reduced strength of core components, etc.

Inactive Publication Date: 2012-04-18
ESSITY HYGIENE & HEALTH AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A problem with such a high content of SAP particles in the core element is that the strength of the core element decreases
There is necessarily an increased risk of SAP particle loss during the formation and transport of such elements

Method used

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  • An apparatus and method for forming air-laid absorbent cores
  • An apparatus and method for forming air-laid absorbent cores
  • An apparatus and method for forming air-laid absorbent cores

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] exist figure 1 A first preferred embodiment of an apparatus for forming an airlaid absorbent core is schematically shown in . The apparatus comprises two forming drums or pad forming wheels, a first wheel 1 and a second wheel 2, each having a series of dies on their peripheral surface. The mold bottom or screen can be made of wire mesh or perforated steel. In conjunction with the outer peripheral surfaces of the two pad forming wheels 1 , 2 are forming chambers or shrouds 3 , 4 . Opposite the hood 3 of the first mat forming wheel, a suction box 5 is provided inside the wheel 1 to suck the aerated slurry or the mixture of slurry and SAP particles through between the hood 3 and the box 5 to the mold Inside. Similarly, a suction box 6 cooperating with the shroud 4 of the second pad forming wheel 2 is provided inside the wheel 2 . The equipment also includes: mills, such as hammer mills, for defiberization of the slurry; ducts for fiber or fiber / SAP transfer; and fans f...

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PUM

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Abstract

The present invention relates to an apparatus for forming air-laid absorbent cores, comprising a first and second mat-forming wheel (1,2). According to the invention means are provided for applying a first and second web of casing material (9,10) onto the peripheral surface of the first and second mat-forming wheel (1,2), respectively, for providing a third web of casing material (11) into the nip between the first and second mat-forming wheel, for applying an adhesive coating on both sides of the third web, the mat- forming wheels (1,2) being so positioned that the formed core elements on the respective first and second mat-forming wheels will abut the third web (11) when passing the nip between the first and second mat-forming wheel, and for pressing together the portions of the three webs located outside the contour of the core element, containing the first and second core element, whereby the air-laid core elements will encapsulated in casing material. The invention also relates to a method for forming air-laid absorbent cores.

Description

technical field [0001] The present invention relates to an apparatus for forming an airlaid absorbent core comprising: first and second pad forming wheels each having at least one die along their peripheral surface; airlaid means for supplying air-entrained fibrous material to the dies on each pad forming wheel; suction means for retaining the formed core elements in the respective dies during a portion of the path of the dies on each pad forming wheel and means for stacking the core elements on the first pad forming wheel and the core elements on the second pad forming wheel to each other. The invention also relates to methods of using such devices. Background technique [0002] Devices of the type described above are used to manufacture multilayer absorbent cores, at least one of these layers comprising dispersed particles of superabsorbent material, preferably a so-called superabsorbent material (SAP), which can absorb several liquid twice its own weight. The fibers in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F13/53D04H1/732D04H1/58D04H1/593D04H1/70D04H1/736
CPCD04H1/593B32B37/12B32B37/206D04H1/736A61F13/15626B32B2305/20D04H1/732D01G25/00D04H1/58B32B2555/02B32B37/0053D04H13/00D04H1/70D04H1/655
Inventor G·爱德华松
Owner ESSITY HYGIENE & HEALTH AB