Toray Industries, Inc.

Kazuo Tomiita

Takao Negishi

Teiryo Kojima

Isamu Kasai

Hisao Inuyama

A specially designed multifilament textured yarn has alternating twists therein. A woven or knitted fabric manufactured from the yarn has a handling similar to that obtained by a hard twist yarn or a true twist yarn and provides pattern with a heather like feeling. In the yarn, S-twist yarn portions and Z-twist yarn portions are alternatingly distributed along the length of the yarn but the non-twisted portion is substantially not included in the yarn. Either S-twist yarn portions or Z-twist yarn portions have a compact twist yarn structure, and the other portions have a bulky twist yarn structure.

Process for manufacturing textured multifilament yarn having alternating

Textured multifilament yarn having alternating twists

A bulky textured multifilament yarn comprises sections of interlaced individual filaments and sections of non-interlaced individual filaments, wherein the interlaced and non-interlaced sections are formed alternately along the lengthwise direction of the yarn, the filaments in any predetermined length of the yarn are substantially identical in length, and some portions of the individual filaments protrude out from the axis of the yarn. The yarn is made by slackening a multifilament yarn treated by a false twisting operation, and then by interlacing the slackened multifilament yarn by means of a fluid jet stream while taking up the multifilament yarn.

Bulky textured multifilament yarn

Process for making bulky textured multifilament yarn

Disclosed is an apparatus for producing a bundle of fibrous elements, at least some of which are uneven in the thickness in the axial direction thereof, namely some of which include thick portions having a larger sectional area and thin portion having a smaller sectional area. In these fibrous elements constituting the fibrous bundle, the thick portions have, in general, a higher dyeability than the thin portions, and in the fibrous bundle, these higher dyeability portions are formed substantially randomly at a distribution ratio of at least 300 portions per 10 cm of the length of the fibrous bundle. This fibrous bundle is characterized in that it apparently resembles a fibrous bundle composed of fibrous elements uniform in the thickness and dyeability.

Apparatus for producing a bundle of fibrous elements

Disclosed is process for producing a bundle of fibrous elements, at least some of which are uneven in the thickness in the axial direction thereof, namely some of which include thick portions having a larger sectional area and thin portion having a smaller sectional area. In these fibrous elements constituting the fibrous bundle, the thick portions have, in general, a higher dyeability than the thin portions, and in the fibrous bundle, these higher dyeability portions are formed substantially randomly at a distribution ratio of at least 300 portions per 10 cm of the length of the fibrous bundle. This fibrous bundle is characterized in that it apparently resembles a fibrous bundle composed of fibrous elements uniform in the thickness and dyeability.

Method for producing an improved bundle of fibrous elements

A method for soft winding around a bobbin a false twisted yarn, which is delivered from a false twisting zone wherein false twists imparted into a fed yarn and running back therealong are heat set and which is heat treated by a second heater, the false twisted yarn being fed by means of a yarn delivery means to the bobbin in a winding apparatus. The time period wherein the false twisted yarn travels from the yarn delivery means to the bobbin is adjusted at a special value so that a soft wound cheese having a uniform and low apparent density and good shape can be obtained.

Method for winding a false twisted yarn in a cheese

Disclosed is a bundle of fibrous elements, at least some of which are uneven in the thickness in the axial direction thereof, namely some of which include thick portions having a larger sectional area and thin portion having a smaller sectional area. In these fibrous elements constituting the fibrous bundle, the thick portions have, in general, a higher dyeability than the thin portions, and in the fibrous bundle, these higher dyeability portions are formed substantially randomly at a distribution ratio of at least 300 portions per 10 cm of the length of the fibrous bundle. This fibrous bundle is characterized in that it apparently resembles a fibrous bundle composed of fibrous elements uniform in the thickness and dyeability. Also a process and apparatus for manufacturing such fibrous bundles are disclosed.

Bundle of fibrous elements

A polyester yarn composed of a plurality of individual fibrous materials such as endless filaments or fibers. Each of these fibrous material is provided with cross-sectional thicker portions, thinner cross sectional portions and intermediate thickness-size portions randomly distributed along the axial direction thereof in a particular condition of distribution of cross-sections of these fibrous material. The above-mentioned polyester yarn involved a textured yarn applied to a drawn polyester multifilament yarn having the above-mentioned basic condition. To produce the polyester yarn according to the present invention, it is the basic condition that the undrawn polyester multifilament yarn should be drawn under a condition of a drawing ratio below a natural draw ratio of undrawn filaments of said undrawn multifilament yarn and a drawing temperature above a crystallizing initiating temperature of said undrawn filaments.

Multifilament yarn having novel configuration and a method for producing

An interlaced multifilament yarn having a balanced compactness and bulkiness, composed of compact and open portions alternately appearing along its length, said compact portions having a fairly uniform configuration of interlacement. The yarn is prepared by bringing a running bundle of filaments in contact with two bending members for bending the thread-line so as to fix the thread-line between them and air jet interlacing the filaments as they pass between the bending members while forming such a stabilized thread-line.

Textured multifilament yarn

Process and apparatus for producing an interlaced multifilament yarn having a balanced compactness and bulkiness, composed of compact and open portions alternately appearing along its length, the compact portions having a fairly uniform configuration of interlacement. The yarn is prepared by bringing a running bundle of filaments in contact with two bending members for bending the thread-line so as to fix the thread-line between them and interlacing the filaments with an air jet as they pass between the bending members while forming such a stabilized thread-line.

Process and apparatus for producing textured multifilament yarn

A polyester yarn composed of a plurality of individual fibrous materials such as endless filaments or fibers. Each of these fibrous material is provided with cross-sectional thicker portions, thinner cross sectional portions and intermediate thickness-size portions randomly distributed along the axial direction thereof in a particular condition of distribution of cross-sections of these fibrous material. The above-mentioned polyester yarn involved a textured yarn applied to a drawn polyester multifilament yarn having the above-mentioned basic condition. To produce the polyester yarn according to the present invention, it is the basic condition that the undrawn polyester multifilament yarn should be drawn under a condition of a drawing ratio below a natural draw ratio of undrawn filaments of said undrawn multifilament yarn and a drawing temperature over a crystallizing initiating temperature of said undrawn filaments.

Growing community of inventors

Otsu, Japan

Kazuo Tomiita