RU2113565C1 - Combined thread - Google Patents

Abstract

FIELD: manufacture of knitted and woven articles. SUBSTANCE: thread contains two components: high-elasticity polyurethane core component and winding component, such as yarn. Yarn may be manufactured from natural or chemical filaments or mixture of these filaments with linear density of 5.9-50 tex, twist factor of 28.5-50.7. Linear density of polyurethane core is below nominal value by 1.5-4 times. EFFECT: improved quality of combined thread, wider range of articles produced from such thread. 1 tbl

Description

 The invention relates to textile production, in particular to the production of combined yarns used for the manufacture of woven and knitted products.

 Known combination thread, consisting of two components, one of which is a highly elastic polyurethane core, and the second is a wrapping component in the form of yarn (GB, patent, 1051081, CL D 02 G 3/36, 1966).

 According to a well-known solution, the polyurethane thread is completely wrapped with yarn. At the same time, due to the high twist that is reported by the twisting yarn during the process, the resulting combined yarn acquires high nonequilibrium, which causes difficulties in further processing in weaving and knitting industries and leads to a deterioration in the quality of finished products, which limits the possibility of obtaining a wide range of products.

 The objective of the invention is the creation of a combined thread that provides a technical result, consisting in improving the quality of the combined thread while expanding the range of products that meet the direction of fashion, made from the resulting thread.

 This technical result in a combined yarn consisting of two components, one of which is a highly elastic polyurethane core, and the second is a wrapping component in the form of yarn, is achieved by the fact that the yarn is made of natural or chemical fibers, or a mixture thereof with a linear density of 5 , 9 - 50.0 tex, with a twist coefficient of yarn feed equal to 28.5 - 50.7, while the twist step of the wrapping component is 1.4-5.0 mm, and the polyurethane core has a linear density lower than the nominal one, 5 - 4.0 times .

 An increase in the twist coefficient of the wrapping component of more than 50.7 is impractical, and a decrease in its minimum value leads to a loss of strength of the wrapping component and, ultimately, to a loss of strength of the thread.

 The linear density range of the wrapping yarn 5.9-50.0 tex is most suitable for producing a combined yarn, and the twist step is a consequence of the twisting of the wrapping component, reported during the manufacturing process when receiving the combined yarn, and is due to the twisting of the wrapping component.

 Use as a wrapping component of yarn made from natural or chemical fibers, or a mixture thereof with a linear density of 5.9 - 50.0 tex with a twisting coefficient of the wrapping component equal to 28.5 - 50.7, with a twist step of 1, 4 - 5.0 mm, when using a polyurethane core (polyurethane yarn) having a linear density 1.5 to 4.0 times lower than the nominal one, it will be possible to obtain a combined yarn with the best elastic properties that affect the quality of manufactured products and expand their range .

 Cotton fibers or linen are used as natural fibers for wrapping yarns.

 As chemical fibers for the wrapping component, polyester fibers or polyamide, or viscose or viscose, high modulus, or polyacrylonitrile, or polypropylene fibers are used.

 The combined thread is obtained as follows.

 From a fixed package located in the supply frame, a polyurethane filament, which is a core, which has a linear density 1.5-4.0 times lower than the nominal one, is fed into the channel of the hollow spindle. This is achieved by additional drawing and thinning of the polyurethane thread. Yarn from natural or chemical fibers, or a mixture thereof with a linear density of 5.9 to 50.0 tex, is also sent to the channel of the hollow spindle from a package located on a hollow spindle. Moreover, the yarn fed, depending on the linear density, has a twist coefficient ranging from 28.5 to 50.7. Natural fibers are cotton or linen fibers, and polyester or polyamide fibers, or viscose or viscose high modulus fibers, or polyacrylonitrile, or polypropylene fibers can be used as chemical fibers. You can also use a mixture of these fibers in various proportions.

 The polyurethane core thread is wrapped with yarn with a twist step of 1.4 to 5.0 mm.

 Examples of the filament are presented in the table.

As can be seen from the table, the use of yarn with a linear density of 50 tex, having a slightly oversized twist of 630 cr / m (α _t = 44.3), which during the process of wrapping a polyurethane yarn after losing 200 cr / m retains 430 cr / m, allows for sufficient strength. For a yarn of this linear density, a further increase in twist in spinning is not possible due to an increase in unevenness, while at the same time, it is not possible to increase the twist when twisting over 200 cr / m at a twist step of 5 mm, since this leads to a loss of strength of the yarn and, accordingly, finished threads.

 For intermediate linear densities, twists and its pitch in the indicated range are accepted, respectively.

 The indicated ranges of linear densities of yarn, twists and linear densities of polyurethane yarns provide a wide range of structures of combined yarns with various properties and purposes.

Claims (1)

 Combined yarn consisting of two components, one of which is a highly elastic polyurethane core, and the second is a wrapping component in the form of yarn, characterized in that the yarn is made of natural or chemical fibers or a mixture thereof with a linear density of 5.9-50, 0 tex, with a twist coefficient of yarn feed equal to 28.5 - 50.7, while the twist pitch of the wrapping component is 1.4 - 5.0 mm, and the polyurethane core has a linear density below the nominal one of 1.5 - 4.0 times.

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