The strength and elongation properties of the loop yarn is mainly decided by the core yarn.

圈圈线的强伸性能主要由芯纱决定；

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The inner core yarn USES high performance fiber and outer wrapped yarn is a hot-melt fiber.

它是以高性能纤维为芯纱、热融纤维为包缠纱，通过二维编织工艺加工而成。

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The protection that wrapped yarn gives to the high performance core yarn improves the weaving performance of core spun yarn.

外层编织纱对高性能芯纱的保护使复合后的纱线的织造性能得到很大改善，可直接在二维或三维织机上进行织造。

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Baker tells me he can make a sock core just as cheaply as anyone in China or Honduras - the machine costs the same, so does the yarn, there's hardly any labor.

NPR: Alabama Town Questions an Economy of Socks