Nippon Petrochemicals Company, Limited

Polymer Processing Research Institute Ltd.

Polymer Processing Research Inst., Ltd.

Nippon Oil Company

Other

Jxtg Nippon Oil & Energy Corporation

Polymer Processing Research

Polymer Processing Research Instr., Ltd.

Hiroshi Yazawa

Kazuhiko Kurihara

Shuichi Murakami

Haruhisa Tani

Yuki Kuroiwa

Toshikazu Ohishi

Yoichi Mazawa

Kintaro Aihara

Yoshimu Iwanami

Jun Yamada

Seizo Kobayashi

Toshikazu Oishi

Shigeki Yokoyama

Takashi Mizoe

Masahide Yazawa

Tadashi Honda

Sadayuki Ishiyama

Sumio Yoshida

Hideyo Rohyama

Masashi Kobayashi

Yasuo Sasaki

Tokio Okada

Shigezo Kojima

Kazutosi Nomiyama

Setsuya Tsuyama

Shigezou Kojima

Mihoko Okada

Yukio Matsumura

Takashi Ishida

Toshio Ohta

Tadayoshi Katoh

Masato Kimura

Takashi Onodera

Kazuhiro Yabe

Osamu Otsu

Akihide Kurata

Hideo Kumehara

Shin'ichi Umejima

Tsutomu Matsuzaki

Hirotsune Okada

Katsuaki Wakahara

Shoichi Yazawa

Takashi Komazawa

Masahide Yazawa, Deceased

By Hiroshi Yazawa, Executor

Keizo Kobayashi

Keiji Jimbo

A mesh nonwoven fabric which is seamless and excellent in appearance is provided. A seamless mesh nonwoven fabric is prepared by laminating a first mesh filmcontaining stem fibersstretching parallel to each other in a first direction and branch fibersconnecting adjacent stem fiberstogether, and a second mesh filmcontaining stem fibersstretching parallel to each other in a second direction intersecting the first direction and branch fibersconnecting adjacent stem fibers

Mesh nonwoven fabric

A laminated structural body is manufactured by laminating unidirectionally arranged strands and a web such that two layers of the web sandwich the strands therebetween. A cylindrical web is delivered in a direction parallel to a central axis thereof. A polymer liquid is discharged from a spinning head, which is disposed in the cylindrical web and rotated about the central axis of the cylindrical web, toward an inner surface of the cylindrical web to spin strands of the discharged polymer liquid. The spun strands are arranged in a direction substantially parallel to the circumferential direction of the cylindrical web and laminated on the inner surface of the cylindrical web. The cylindrical web with the strands laminated thereon is folded flatwise to sandwich the strands between the two folded layers of the web.

Laminated structural body having unidirectionally arranged strands sandwiched between two web layers, and method of and apparatus for efficiently manufacturing such laminated structural body

A process for producing a filament assembly composed of a thermotropic liquid crystal polymer, which comprises melt extruding a thermotropic liquid crystal polymer through an orifice nozzle into a high-speed fluid to thereby hold filaments spun right under the spinning nozzle at a high temperature, so that the filaments are taken up at a high draft ratio by the frictional force of the high-speed fluid.

Process for producing filament and filament assembly composed of thermotropic liquid crystal polymer

A longitudinally stretched nonwoven fabric and a method for producing the same, which nonwoven fabric is a web mainly composed of long fiber filaments of 3 .mu.m to 15 .mu.m in diameter and made by short distance stretching in one direction at a stretching ratio of at least 5, and which production method is characterized in the steps of: maintaining the spun filaments in a draftable state; cooling the filaments with a cooling fluid, then guiding the filaments onto a conveyer with inclining the flow of filaments toward the transferring direction, and sucking by a reduced pressure from the back side of said conveyer, and further subjecting the web of filaments to short distance stretching in the longitudinal direction.

Longitudinally stretched nonwoven fabric and method for producing the

A base fabric used for producing an adhesive tape and the adhesive tape with the same, which adhesive tape has good transversely tearable property and small in thickness, said base fabric being composed of at least one longitudinal base material of stretched unidirectionally aligned nonwoven fabric which is made by spinning a thermoplastic resin into a long filament nonwoven fabric and stretching it in one direction so as to aligne its filaments almost in one direction.

Adhesive tape and its base fabric

An ultra-high molecular weight polyolefin having a viscosity average molecular weight of at least 500,000 is subjected to melt forming into a film, the thus obtained molten film or solid state film is transversely stretched while holding both the side edges of the film, the stretched film is longitudinally slitted into tapes, and then the thus obtained tapes are longitudinally stretched thereby to produce high-strength yarns easily. A number of slits are longitudinally or transversely made in films made of an ultra-high molecular weight polyolefin having a viscosity average molecular weight of at least 500,000 so that the films each take a meshy form when spread in the direction perpendicular to the slits, and the meshy form structures are stretched in the direction of the slits to prepare meshy webs having a high strength unidirectionally. At least one member selected from the thus prepared meshy webs is used as one nonwoven web, thereby producing a high-strength, web-crossed laminated nonwoven easily.

Process of making high-strength yarns

Process for producing filament and filament assembly composed of

The invention provides a nonwoven fabric of stretched filaments of different kind polymers, having a strength equal to that of a woven fabric and features including an elongation, a uniformity, good feeling, a bulkiness and a thinness, characterized in that the nonwoven fabric is provided with stretched filament webs comprising long filaments formed out of a plural kinds of thermoplastic polymers of different properties, the long filaments as a whole being aligned in one direction, and a method for manufacturing the same. The invention provides also a nonwoven fabric of stretched filaments having a high strength as well as a high bulkiness and comprising different kind polymers which is provided with a first web layer of crimped filaments and a second web layer of substantially non-crimped, stretched long filaments, and a method for manufacturing the same.

Nonwoven fabric and method of making the same

Device for transversely stretching web

A relatively inexpensive web widening apparatus which is suitable for the manufacture of a widened web having a large width and a lightweight web while maintaining a high widening ratio and the uniformity of the web and can be operated with ease at a high efficiency comprises a widening tool in contact with the web, having first and second groups of widening plates arranged in a width direction of the web to face each other, at least one pair of cross guiders which can nip both side end portions of the web, and guide means for moving the widening plates of the first and second groups in such a manner that the interval between the widening plates expands gradually as they rotate and then narrows gradually.

Web widening apparatus

The object of the present invention is to provide a nonwoven fabric which is excellent in bulkiness and touch feeling as well as strength and dimensional stability and to provide a method for producing the above nonwoven fabric through a simple and convenient manner without employing any particular spinning device. The invention relates to a bulky nonwoven fabric composed of a stretched filament web which is prepared from either at least one layer of a stretched unidirectionally arranged filament web which is composed of almost unidirectionally arranged long fibers being stretched and shrunk or a stretched crosswise laminated filament web made of two or more layers of the stretched unidirectionally arranged filament webs and a short fiber web which is entangled with said stretched filament web and is crimped as a result of shrinkage of the long fibers, and a method for producing the same.

Bulky nonwoven fabric and method for producing the same

Web spreading apparatus

The present invention provides a prepreg obtained by stretching a material including, as a main component, an ultra-high-molecular-weight polyethylene having an intrinsic viscosity of 5-50 dl/g as measured at 135.degree. C. in decalin, to a total draw ratio of at least 20, subjecting the resulting stretched polyethylene material to a splitting treatment, and impregnating the resulting material with a thermosetting resin. The split stretched polyethylene material has improved adhesion to the impregnant resin and can be used as a good base material for prepreg.

Prepreg of ultra-high-molecular-weight polyethylene

Disclosed is a method for the continuous production of a polyethylene material having high strength and high modulus of elasticity by rolling an ultra-high-molecular-weight polyethylene film or film like material and then drawing the rolled material, wherein a thermoplastic resin film having incorporated therein at least one additive selected from the group consisting of a coloring agent, a weathering stabilizer, an antistatic agent, a hydrophilicity-imparting agent, an adhesion promoter and a dyeability-imparting agent is laminated to the film material in the rolling step and the resulting polyethylene material is further slit or split as required. This method makes it easy to color the polyethylene material having high strength and high modulus of elasticity and to impart weather resistance and other desirable properties thereto.

Method for the continuous production of a polyethylene material having

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Kunitachi, Japan

Hiroshi Yazawa