Mitsui Petrochemical Industries, Ltd.

Unicharm Corporation

Shuzo Sasagawa

Kazunari Nishino

Takamitsu Igaue

Tsutomu Kido

Hirofumi Katsurayama

Noriyuki Ishii

Takashi Hiraoka

Shozo Hieda

Takafumi Kaneko

Haruki Nagaoka

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

A synthetic resin laminate composed of a supporting plate having protrusions and a foamed sheet having fine through-holes and fixed to the protrusions is produced by placing a foamed sheet extruded on the protrusions of a supporting plate heated to a temperature suitable for fusion-fixing and applying a draft to the supporting plate at a speed more than, but not exceeding 5 times the speed of the foamed sheet.

Process for producing synthetic resin laminates

Growing community of inventors

Kuga, Japan

Shuzo Sasagawa