Method of manufacturing electro-magnetic wave shielding yarn

Abstract

The present invention relates to a method of manufacturing electromagnetic wave shielding yarn comprising the steps of (1) spinning core yarn with the apparatus for core spun yarn on ring spinning machine, (2) preparing rovings made of natural, synthetic and blended fiber, (3) preparing a twisted wire-filament core, (4) feeding rovings to front rollers through back and middle rollers, (5) supplying said twisted core to the front rollers applying tension on the twisted core by means of drafting the twisted core with suitable draft ratio which is the ratio of surface velocity between core supplying rollers and the front rollers and (6) twisting the delivered core yarn.

Description

[0001] The present invention relates to a method of manufacturing electromagnetic wave shielding yarn, in particular an electromagnetic wave shielding yarn improving the effects of shielding the electro-magnetic wave and anti-biotic degree.[0002] The yarn according to the invention has ability of shielding electromagnetic wave. Techniques of spinning core yarn are utilized, but more subtle modifications are added to the conventional technique of core yarn making.[0003] Many reports regarding harmfulness of electromagnetic wave to human body are published. Various methods or products, which can protect a person from the harms of the wave has been introduced. Among them, wearing products also introduced in the market. Some products are made of fabrics, which are coated with silver or copper by means of making electric charges. Applying this method to natural fiber can not pledge the durability against laundering.[0004] Some products are made of fabrics which contain bare copper wires....

AI Technical Summary

Benefits of technology

[0012] To prevent breaking copper wire of weak strength, synthetic filament yarn and copper yarn is twisted together and this twisted yarn-wire is used as core. Roving is prepared with conventional process of cotton spinning system or worsted system, using natural fiber, synthetic fiber or its blend. The twisted core and roving are supplied to the apparatus on the ring spinning machine to spin core yarn. Draft of suitable ratio is applied to the core to make it to be covered with the fiber from the roving. The adjustment of the ratio of draft is crucially important to get thorough covering of core with fiber.

[0014] Material of any fiber, either natural, synthetic or blended, is fed the conventional cotton spinning system or worsted spinning system and roving is made with prior art. Gold, silver, platinum, stainless, iron and carbon can be used as conductive material. Among them, copper has good properties with handy availability, being less expensive.

[0019] To increase the degree of shielding effect, the ratio of core yarn against regular yarn is increased at design of fabric. Copper wire makes the fabric to have anti-biotic and anti-static property. The devices of this art can be adapted to either cotton ring spinning machine or worsted ring spinning machine.

Problems solved by technology

Applying this method to natural fiber can not pledge the durability against laundering.

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