SPINNERET FOR PRODUCTION OF LINEAR MATERIAL WITH - UN USUAL HORIZONTAL CROSS SECT ION

Sep 21, 2026

Uploaded by Miles

Patent text describing a spinneret for producing a linear material with an unusual horizontal cross section and four symmetrical smooth grooves along the fiber axis. The specification explains limitations of prior spinneret/orifice shapes, including difficulty of fabrication, nozzle plugging, and groove rounding due to surface tension during melt spinning. It sets out the objective to achieve suitable shine and elegant, silky gloss, particularly for knitted fabrics, and details the geometric arrangement forming the orifice cross section.

LanguageEnglish

CategoryResearch & Report

FormatPDF

Pages20

Reading Time50 min

AccessFree to download

Simple Explanation of the Figures

Detailed Description of the Invention

Ueda,Toshizo. Spinneret for production of linear materialwith unusual horizontal cross section /byToshizo Ueda and Hisao Kokezawa.8 p.:ill. Patent(Japanese)No.48-9204 (1973).Filed: TRANSLATION NO.4599. TRANSLATIONPATENT BUREAU OF JAPANOFFICIAL GAZETTE FOR PATENTS Japanese Patent Publication Koho: 48-9204 Publication Date: March 22,1973 Number of Inventions:1 Request for Examination:(Not yet requested) (Total of 4 pages) # SPINNERET FOR PRODUCTION OF LINEAR MATERIAL WITH UN USUAL HORIZONTAL CROSS SECT ION Application No.: 46-60042 Application Date:June 20,1960 Inventors: Toshizo Ueda 25-23 Higashiashiya-chyo,Ashiya-shiHisao Kokezawa5-2-23 Kanebo-machi,Bofu-shi Applicant:Kanebo Co.Ltd.3-3-26 Tsutsumidori,Sumida-ku,Tokyo-to Patent Attorney: Koichi Mizukuchi,Agent # Simple Explanation of the Figures Figure 1 shows a specific example of the orifice shape on the spinneretof this invention.Figure 2 shows an enlarged cross sectional view of thelinear material obtained by spinning through aforementioned spinneret.Detailed Description of the Invention This invention deals with a spinneret for the production of a beautifulnovel linear material with a silky gloss equipped with four indentations alongthe fiber axis made from fiber forming starting materials which can be melt spun such as polyamides,polyesters or inorganic glass. In order to impart favorable pro perties to the fibers used to weavecloths,various cross sectional shapes for the fibers have been used. For example,U.S.Patent No.2939201 presents a filament with atriangular cross sectional shape with three indentations along the fiber axis.The patent claims that the said filament has a unique glossy look called"1uster high light"and is useful in pre paring fabrics with improved soilresistan ce.Similarly,fibers with ribbon shaped,dog bone shaped or crossshaped horizontal cross section have been introduced to improve the propertiesof the fabrics. However,none of the horizontal cross sectional shapes known in the priorart can be said to impart all the desirable properties to the final fabricproduct suf ficiently.In other wor ds,the aforementioned triangular shapedfilament is too shiny and lacks the elegance and the silky luster.Thus,theproduction of a linear material with a silky luster and the elegance of silkwill be a significant advancement especially in the clothing field. In preparing fibers with unusual horizontal cross section describedabove,theshape of the orifice corresponding to the horizontal cross sectionof the prior art is combined with a linear slit or an orifice with a shapesuch as triangle is used for spinning.Howe ver,such orifice is difficult toprepare technically and it tends to cause plugging of the fine nozzle.Thus,the modification of the existing orifice has not been completely satisfactory.Furthermore,the melt spun fiber spun from triangular or square shaped orificetends to become roun ded out by the action of the sur face tension of theun solidified filament.Thus,it is impossible to obtain a linear materialwith sufficient indentations or grooves along the filament axis by thisapproach. U.S.Patent No.2831748 presents a porous plate equipped with orifices https://archive.org/details/spinneretforprod00ueda each consisting of several circular holes slightly overlapping with eachother.this invention used this plate as a spinneret for the melt spinning ofcellulose acetate.None of the suggested orifice was successful in presentinga linear material equipped with four symmetrical indentations or grooves alongthe direction of the fiber axis. The objective of this invention is to provide a linear material equippedwith four symmetrical groo ves along the lengthwise direction having a suitabledegree of shine and elegant and silky beautiful gloss.This linear materialis particularly designed for knitted fabrics. The aforementioned objective is achieved by a spinneret for theproduction of a linear material having a

FAQs

What problem does this invention aim to solve in producing fibers with unusual horizontal cross sections?

Prior horizontal cross-sectional shapes fail to impart all desirable properties to the final fabric sufficiently. The specification also notes technical difficulty in preparing certain orifices and groove loss due to rounding from surface tension during melt spinning.

What is the key design goal of the proposed spinneret?

To provide a linear material with four symmetrical grooves along the filament axis, achieving suitable shine and elegant, silky gloss, especially for knitted fabrics.

How does the invention describe the orifice geometry for the spinneret?

The orifice horizontal cross section is formed by overlapping circles within rectangles (labeled L1 and L2), with circles positioned so that their overlaps and touches satisfy specific distance relationships between centers, creating the required groove pattern.

Sep 21, 2026

Uploaded by Miles