FR2515007A1 - DISPOSABLE LAYER - Google Patents

Abstract

THIS LAYER INCLUDES A SUPPORT SHEET 12, AN ABSORBENT BUFFER 14 ON THE SUITABLE SUPPORT SHEET AND A TOP SHEET 16 COVERING THEIT ABSORBENT BUFFER AND FIXED ON THE SAID SUPPORT SHEET 12 ALONG ITS PERIPHERAL EDGES, LEDIT ABSORBING PAD 18 OF AN ABSORBENT MATERIAL, AND A TOP LAYER 20 OF ABSORBENT MATERIAL ONLY ALONG THE SIDE EDGES OF THE SAID BASE LAYER.

Description

1 - The present invention relates to disposable diapers of either

  rectangular either in hourglass, and more particularly in a disposable diaper having effective means for taking fluids. In the past, diapers have been provided with fluid traps usually formed of an impermeable material such as a sheet of

  unperforated polyethylene or other similar material.

  A form of fluid trap is formed from a material consisting of a fluid-impervious support envelope which extends over the

  top sheet This sometimes becomes an incon-

  comes because the backing sheet material can cause discomfort or irritation

of a child.

  Another barrier for the fluid is

  formed using strips of waterproof material

  cloth forming a bond for the diaper, but this makes a diaper expensive and difficult to manufacture and the waterproof material is even less comfortable

  than the usual top sheet of fabric.

  Note that the use of additional impermeable material increases the rigidity of the layer, thus making correct adaptation more difficult if not improbable while adding nothing.

  to the absorption capacity of the layer.

  The invention eliminates the difficulties of the prior art by providing a fluid barrier which has the additional advantage of an additional absorption capacity. The disposable diaper according to the invention comprises a support sheet, an absorbent pad on the sheet. carrier and an upper sheet covering the absorbent pad and bonded or heat welded to the carrier sheet along the peripheral edge thereof The absorbent pad has a base layer and an upper layer of absorbent material only along opposite side edges of the base layer forming a trap and a fluid barrier This arrangement can be used both for shaped layers, elastic or not, and for layers

rectangular in shape.

  Other features and benefits

  of the invention will appear during the description

  which follows In the accompanying drawing: FIG. 1 is a plan view of a shaped layer according to the invention; Fig 2 is a sectional view along line 2-2 of Fig 1; Fig 3 is a plan view of a rectangular layer according to the invention; Fig 4 is a sectional view taken along line 4-4 of Fig 3, and

  FIG. 5 is a schematic view showing

  an example of the formation of two layers of

absorbent pad according to the invention.

  Referring to the drawings, in which the same references designate similar parts in the different views, the reference 10 as a whole designates a shaped layer shown in FIGS.

1 and 2, according to the invention.

  Layer 10 includes a backing sheet 12, an absorbent pad 14 and a sheet

upper 16.

  The carrier sheet 12 is formed of any suitable impermeable material such as an unperforated sheet of polyethylene or the like. The top sheet 16 is preferably formed from a non-irritating and comfortable material such as a sheet of polyethylene fibers or

non-woven polypropylene.

  The absorbent pad 14 is formed of any suitable absorbent material such as

  wood down commonly used in this technique.

  The conventional absorbent pads in wood down are stamped to the desired shape and arranged in a sandwich

  between the top sheet and the backing sheet.

  According to the invention, the absorbent pad 14 comprises a base layer 18 and an upper layer in two parts arranged along the opposite sides 22, 24 of the pad 14 The pad 14 is cut into an hourglass shape, forming a crotch area 26 and pairs of opposite ears 28 at the four angles of the layer The upper layer 20 extends above the ears 28 In a variant, it is within the scope of the invention to provide the upper layer only in the area crotch of the layer As shown in Fig 5, the pad 114 may include cutouts 116, 118 which extend inwardly and convergently The flap 120 thus formed is

  folded inward to form the top layer.

  Elastic elements constituted by elastic bands 40 are fixed to the support sheet 12, if desired, and the upper sheet is heat-sealed or glued to the support sheet 12

  along its peripheral edges The upper layer

  20, 120 forms barriers to fluids while increasing the absorption capacity of the layer and can be compressed during use to increase

the barrier effect.

  As can be seen, the upper layer can form an extension of the base layer 18 by folding. Alternatively, the upper layer can be made in a separate piece. However, the folding of the upper layer 20 seems to increase.

on this point the barrier effect.

  Figs 3 and 4 show an embodiment 10 of the invention for use as a rectangular layer The absorbent pad 214, preferably made of wood down, is sandwiched between the support sheet 212, which is preferably a sheet of polyethylene and the upper sheet 216, preferably made of non-woven polyethylene or polypropylene fibers The ends 219 of the support sheet 212 are folded over the

top sheet 216.

  The absorbent pad 214 comprises a base layer 2 18 and an upper layer -220 along opposite side edges 222 and 224 of the absorbent pad 214 The upper layer 220 may preferably be a fold of the base layer 218 or may be formed separate pieces arranged on the layer

basic 218.

  The different embodiments of the diaper can be applied to a child in

  using self-adhesive adhesive tabs.

-5-

Claims (8)

  1 disposable diaper characterized in that it   includes support sheet 12,212, absorbent pad   bant 14,214 on said support sheet and an upper sheet 16, 216 covering said absorbent pad and fixed on said support sheet 12,212 along its peripheral edges, said absorbent pad comprising a base layer 18,218 of an absorbent material, and   an upper layer 20,220 of absorbent material only   along the side edges of said layer of based.   2 disposable diaper according to claim 1, charac-   terized in that said absorbent pad 14,214 has an hourglass shape delimiting a crotch area 26 and pairs of opposite ears 28 extending outwards, said upper layer extending at least along the crotch area.   3 disposable diaper according to claim 1, charac-   terized in that said upper layer 20,220 is   integral with said base layer 18,218.   4 disposable diaper according to claim 1, charac-   terized in that said upper layer 20,220 is integral with said base layer 18,218 and forms a   extension of said base layer which is folded.   Disposable diaper according to claim 1, characterized in that said upper layer 20,220 is   separated from said base layer 18,218.   6 disposable diaper according to claim 1, charac-   terized in that said absorbent pad comprises pairs of oblique and convergent cuts 116,118, the parts 120 between said cuts being folded over said base layer 18,118 and forming said layer higher 20,220.   7 disposable diaper according to claim 6, charac-   terized in that said cutouts 116,118 form said hourglass absorbent pad when said portions between said cutouts are folded   to form said top layer.   8 disposable diaper according to claim 2, charac-   terized in that said upper layer 20,220 is   integral with said base layer 18.218 -   9 disposable diaper according to claim 2, charac-   terized in that said upper layer 20,220 is distinct from base layer 18,218 and extends by above said ears 28.   Disposable diaper according to claim 8, charac-   terized in that said upper layer 20,220 extends over said ears 28.