Mitsui Petrochemical Industries, Ltd.

Unicharm Corporation

Kazunari Nishino

Takamitsu Igaue

Tsutomu Kido

Hisashi Takai

Shizuo Shimizu

Shuzo Sasagawa

Shigeyuki Motomura

Hirofumi Katsurayama

Haruki Nagaoka

A topsheet for use in body fluid absorptive articles is so improved that collapse and clogging of liquid passages therein may be reliably avoided. The topsheet includes an upper sheet, provided with skin-contacting areas and liquid passages, and a lower sheet provided with skin-non-contacting areas, areas welded to the liquid passages, and exposed areas. The exposed areas are welded to each of the liquid passages around lower openings thereof so as to protect the liquid passage against collapse and clogging. The exposed areas define a skin-contacting surface which rises up into each of the liquid passages without extending above the upper surface of the skin-contacting areas. The upper sheet cooperates with the lower sheet to define cavities extending in the direction of the topsheet thickness.

Method for making a topsheet for use in disposable body fluid absorptive

Apparatus for making the topsheet of a fluid absorptive article

Topsheet for use in disposable body fluid absorptive articles

Bulky split fibers having bond strength are produced by preparing a composite synthetic resin film of three layer structure having a polypropylene layer formed of a polypropylene/polyethylene blend and a polyethylene layer on either surface of the polypropylene layer, slitting and stretching the composite film to thereby form stretched tapes, and causing splitting of the stretched tapes for fibrillation. An integral article is prepared from the resultant split fibers by mixing them alone or with plant fibers and then heating at a temperature between the melting points of polyethylene and polypropylene, thereby integrating together the split fibers with each other or with the plant fibers.

Split fibers, integrated split fiber articles and method for preparing

A composition comprising polypropylene and a small amount of polyethylene can be shaped into an obliquely oriented film, and if obliquely oriented films shaped from this composition are laminated so that the molecular orientation directions cross one another, an obliquely oriented cross film having excellent heat resistance and mechanical strength is obtained. This cross film is suitably used as a base of a fastening tape for a paper diaper.

Obliquely oriented polypropylene cross film and fastening tape for paper

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Kuga, Japan

Kazunari Nishino