Nippon Petrochemicals Company, Limited

Polymer Processing Research Institute Ltd.

Polymer Processing Research Inst., Ltd.

Nippon Oil Company

Other

Sekisui Kagaku Kogyo Kabushiki Kaisha

Polymer Processing Research

Polymer Processing Research Instr., Ltd.

Kazuhiko Kurihara

Hiroshi Yazawa

Yuki Kuroiwa

Haruhisa Tani

Shuichi Murakami

Yoichi Mazawa

Toshikazu Ohishi

Masahide Yazawa

Kintaro Aihara

Yoshimu Iwanami

Tokio Okada

Shigezo Kojima

Yoshiro Morino

Jun Yamada

Seizo Kobayashi

Toshikazu Oishi

Hirosi Yazawa

Shigeki Yokoyama

Takashi Mizoe

Sadayuki Ishiyama

Tadashi Honda

Sumio Yoshida

Masashi Kobayashi

Kazuhiro Yabe

Hideyo Rohyama

Yasuo Sasaki

Setsuya Tsuyama

Kazutosi Nomiyama

Shigezou Kojima

Shin-ichi Umejima

Yukio Matsumura

Mihoko Okada

Masato Kimura

Osamu Otsu

Masaki Matsumoto

Akihide Kurata

Tsutomu Matsuzaki

Hirotsune Okada

Katsuaki Wakahara

Shoichi Yazawa

Akira Nii

Takashi Komazawa

Kenichi Narikawa

Masahide Yazawa, Deceased

By Hiroshi Yazawa, Executor

Keizo Kobayashi

Shin'ichi Umejima

Keiji Jimbo

An apparatus for manufacturing a transversely aligned web has a spinning device provided with a plurality of nozzles for extruding molten polymer as filaments, and a conveyor on which the filaments spun by the spinning device are piled and traveling in a direction cross to the direction of array of the nozzles. The spinning device is provided with a high-speed fluid blowing unit for blowing a high-speed fluid in a direction parallel with a direction in which the filaments are extruded from the nozzles so as to attenuate the filaments. Further, the apparatus for manufacturing the transversely aligned web has at least one air stream vibrating mechanism for cyclically changing the flowing direction of the high-speed fluid blown from the high-speed fluid blowing unit in a direction cross to the machine direction of the conveyor. The filaments are vibrated in a direction cross to the machine direction of the conveyor, owing to the high-speed fluid by the air stream vibrating unit.

Method of and apparatus for manufacturing a web having filaments aligned in a transverse direction

The present invention relates to an apparatus for producing a transversely aligned web having filaments aligned in the transverse direction, comprising conveyor running in one direction, spinning nozzle disposed above the conveyor, an annular primary airflow nozzle, and at least one pair of secondary airflow nozzles disposed on the upstream side and the downstream side of the running direction of the conveyor.

Apparatus for producing a transversely aligned web in which filaments spun at high rate are aligned in the transverse direction

A transversely stretched nonwoven fabric is manufactured by transversely stretching a nonwoven fabric. First, an original web comprising a plurality of un-oriented filaments is heated to a temperature higher than its stretch suitable temperature by 5&deg; C. or more. Next, the heated original web is stretched at a rate of 1.2 to 3 in its transverse direction to stretch the filaments of the original web with almost no molecular orientation involved. Then, the original web stretched transversely at a rate of 1.2 to 3 is heated to the stretch suitable temperature and the original web is further stretched transversely at the stretch suitable temperature. With these steps, a transversely stretched nonwoven fabric in which the original web is stretched transversely at a rate of 7 times or more in total as compared with the state of the stretch thereof is manufactured with a high tensile strength of 132.5 mN/tex (1.5 g/d) in the transverse direction.

Heating apparatus for a transversely stretched nonwoven fabric

A multiaxial laminated non-woven fabric is formed with tows overlaid and bonded with one another. The starting material tow is crimped and has a total tex of not more than 300,000 and filaments in the tow have an average fineness of not more than 3 tex. A three-dimensional molded product made from the multiaxial non-woven fabric is also provided. The non-woven tow fabric of ensured quality is produced by bonding tows multiaxially and obliquely overlaid with one another, for example by needle punching or heat treatment, while the tows are held by pins of an overlaying machine.

Tow multiaxial non-woven fabric

An apparatus for manufacturing a nonwoven fabric has a spinning mechanism having a plurality of nozzles for extruding filaments, and a conveyor for collecting and delivering the extruded filaments. Between the spinning mechanism and the conveyor, there are disposed a high-speed air stream generating mechanism for generating a high-speed air stream to carry the filaments extruded from the nozzles to attenuate the filaments, and an air stream vibrating mechanism for periodically changing the direction of the high-speed air stream in the machine direction of the conveyor.

Method of and apparatus for manufacturing longitudinally aligned nonwoven fabric

Transversely stretched nonwoven fabric with high tensile strength stretched seven times wider or more in transverse direction

The present invention relates to a method of producing a transversely aligned web comprising the steps of extruding melted resin from a spinning nozzle to direct the metal resin downward, blowing off a primary airflow at a high temperature and at high velocity from an annular primary airflow nozzle, blowing off a pair of secondary airflows at a high temperature from a pair of secondary airflow nozzles, colliding with the pair of airflow blown off from the pair of secondary airflow nozzles each other below the spinning nozzle, spreading the colliding secondary airflow at least partly in the width direction of the conveyor, and piling on the conveyor the spun filaments so that transversely aligned web is formed of the filaments which are aligned in the width direction of the conveyor.

Transversely aligned web in which filaments spun at high rate aligned in the transverse direction

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

Growing community of inventors

Tokyo, Japan

Kazuhiko Kurihara