Absorbent article with open pore film

Abstract

To solve such conventional problems that an open hole is collapsed and a rib part between open holes is cut into pieces because the strength of an open hole film formed by drawing a film formed by mixing a filler with a resin and forming a cell allowing steam to permeate inside the film and the open hole is reduced due to the cell. The open hole film 10 having many open holes 11 and a liquid leading tube 12 is used as the surface sheet of an absorbing article. This open hole sheet 10 is formed by a resin material in which a polyester which becomes a hard component, a block copolymer with a polyester or a polyether which becomes a soft component, and an olefinic resin are mixed. The block copolymer has steam permeation property and excellent expansibility and durability. Furthermore, adhesive property of the surface can be suppressed because it contains the olefinic resin.

Description

technical field [0001] The present invention relates to absorbent articles such as sanitary napkins, disposable diapers, urine taking pads, panty liners, and the like. In particular, the present invention relates to absorbent articles provided with an apertured film on the liquid receiving side. Background technique [0002] The liquid-receiving side outer member of a sanitary napkin or a disposable diaper has a type using an apertured film. [0003] The manufacturing process of this perforated film is such that a resin film having an olefin system or the like is supplied to a sieve-type drum having many holes on the surface, the resin is softened by hot air, and the suction pressure inside the sieve-type drum is applied to the above-mentioned Holes corresponding to the above-mentioned roller holes are formed in the resin film, and the periphery of the holes protrudes toward the side of the film to form a catheter. [0004] In the above-mentioned apertured film, the film it...

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Problems solved by technology

[0005] However, since the perforated film forms voids or cracks as the microcavities in the catheter as the surrounding portion of the hole, or in the rib between the holes, the strength of the catheter or the rib decreases.

As a result, under the action of contact pressure with the wearer's skin or frictional force with the skin, the above-mentioned catheter is crushed, the pores are blocked by resin, and the liquid permeability of the perforated membrane is reduced.

Alternatively, if the above-mentioned ribs are cut off and the pores are connected by the broken part of the film, the liquid absorbed in the absorbent core will easily flow back to the surface of the perforated film.

[0006] In addition, in the previous process, the resin film mixed with the filler is stretched to form the above-mentioned microscopic cavity, and in the subsequent process, holes are formed in the resin film by the above-mentioned sieve drum, but due to the The strength of the resin film is reduced due to the presence of fillers and microscopic cavities, so it is difficult to form pores with stable shapes

As a result, there is also the risk that the corresponding holes have different areas or that the ribs between the holes are broken due to the effect of the suction pressure at the sieve drum.

[0007] In addition, in order to improve the strength of the film formed with the above-mentioned microcavities, it is also considered to increase the paper weight of the film, but if the paper weight (meter) of the film is increased, it will be difficult to pass the suction pressure of the above-mentioned sieve drum to form Hole, for the same reason, it is easy to be difficult to form the hole stably

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