Preparation method of covering yarn

Abstract

The invention provides a preparation method of covering yarn, and relates to the technical field of spinning. The core-spun yarn is of a structure that a skin spirally winds and wraps a core. The preparation method comprises the steps that a first yarn serving as the core directly penetrates through a yarn guide ring; the second yarn serving as the skin sequentially penetrates through the tensioner, the bottom of the rotary twisting plate, the two-for-one twisting aluminum pot and the yarn guide ring, and the second yarn and the first yarn penetrating through the yarn guide ring are subjected to two-for-one twisting to form the covering yarn. The core-spun yarn is obtained through a two-for-one twisting and wrapping synchronous forming method, the preparation process is simple, and the performance of the core-spun yarn is good.

Description

Technical Field

[0001] The invention belongs to the technical field of textiles and relates to a method for preparing core-spun yarn. Background Art

[0002] Core-spun yarn is a unique composite yarn in which a sheath fiber is spirally wrapped around the outer surface of an inner core fiber, combining the characteristics of two or more fibers. Existing core-spun yarn production processes typically involve wrapping a twisted sheath fiber around the outer surface of an untwisted inner core fiber. This involves first preparing the twisted sheath fiber and then wrapping the sheath fiber around the outer surface of the inner core fiber.

[0003] Therefore, the existing method for preparing core-spun yarn is relatively complicated and urgently needs to be improved. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a method for preparing core-spun yarn.

[0005] The technical solutions of the present invention are as follows:

[0006] A method for preparing a core-spun yarn, comprising:

[0007] The first yarn as the core passes directly through the yarn guide ring;

[0008] The second yarn as the sheath passes through the tensioner, the bottom of the rotating twisting disk, the double-twisting aluminum tank and the yarn guide ring in sequence, and is double-twisted with the first yarn passing through the yarn guide ring to form a core-spun yarn;

[0009] The yarn guide ring is located above the tensioner, and the tensioner is located above the rotating twisting disc and the two-for-one twisting aluminum can;

[0010] The core-spun yarn is formed by covering the first yarn with the second yarn.

[0011] Preferably, the first yarn and the second yarn are independently selected from one of chemical fiber yarn, natural fiber yarn and blended yarn.

[0012] Preferably, the first yarn is selected from natural fiber yarn, and the second yarn is selected from chemical fiber yarn.

[0013] More preferably, the first yarn is selected from cotton fiber yarn, and the second yarn is selected from polyester yarn.

[0014] Preferably, the first yarn is pre-reeled onto an FDY paper tube, and the second yarn is pre-reeled onto a two-for-one twisted aluminum tube;

[0015] The FDY paper tube and the twisted aluminum tube are independently cylindrical, and the FDY paper tube and the twisted aluminum tube are coaxially arranged, and the diameter of the twisted aluminum tube is smaller than the diameter of the FDY paper tube.

[0016] More preferably, after the second yarn passes through the tensioner and before passing through the bottom of the rotating twisting disc, it also passes through the two-for-one twisting aluminum tube and the FDY paper tube in sequence.

[0017] Preferably, the tensioner is a steel ball tensioner;

[0018] Three 6# steel balls are arranged inside the steel ball tensioner.

[0019] Preferably, the twisted aluminum can is cylindrical, the twisted aluminum can and the FDY paper tube are coaxially arranged, and the diameter of the twisted aluminum can is larger than the diameter of the FDY paper tube;

[0020] The second yarn passes through the bottom of the two-for-one twisted aluminum can.

[0021] More preferably, the diameter of the twisted aluminum can is 1.2 times or more of the diameter of the FDY paper tube.

[0022] Preferably, the doubling is performed by the rotating twisting disc, and the doubling is in the Z-axis direction, 5000-7000 turns / min, and 100-600 twists / m.

[0023] The beneficial effects of the present invention are as follows: the present invention adopts a method of simultaneous twisting and covering of the first yarn and the second yarn to directly prepare a core-spun yarn with a spiral covering structure through a single forming process, thereby optimizing the preparation process of the core-spun yarn, and the prepared core-spun yarn has better performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic cross-sectional view of a core-spun yarn preparation device according to Example 1;

[0025] Among them, 1- yarn guide ring, 2- tensioner, 3- two-for-one twisted aluminum tube, 4- FDY paper tube, 6- rotating twist disk, 5- two-for-one twisted aluminum can.

[0026] Figure 2 The guide paths of the first yarn and the second yarn in the preparation of the core-spun yarn of Example 1;

[0027] Among them, A is the guide route of the first yarn, and B is the guide route of the second yarn. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further illustrated and described below through specific implementation methods.

[0029] The present invention provides a method for preparing a core-spun yarn, comprising:

[0030] The first yarn as the core passes directly through the yarn guide ring;

[0031] The second yarn as the sheath passes through the tensioner, the bottom of the rotating twisting disk, the double-twisting aluminum tank and the yarn guide ring in sequence, and is double-twisted with the first yarn passing through the yarn guide ring to form a core-spun yarn;

[0032] The yarn guide ring is located above the tensioner, and the tensioner is located above the rotating twisting disc and the two-for-one twisting aluminum tank;

[0033] The core-spun yarn is a second yarn covering a first yarn.

[0034] The present invention uses a method of simultaneous two-for-one twisting and covering to produce core-spun yarn. A first yarn and a second yarn are separately and synchronously formed. The first yarn is directly guided to and passes from bottom to top through a yarn guide ring to form the core of the core-spun yarn. The second yarn, serving as the sheath of the core-spun yarn, passes through a tensioner, the bottom of a rotating twisting disc, a two-for-one twisting aluminum can, and a yarn guide ring in sequence. The rotation of the rotating twisting disc allows the yarn to be twisted and spirally wrapped around the surface of the first yarn passing through the yarn guide ring, thereby forming the core-spun yarn. Therefore, the method of producing core-spun yarn according to the present invention is relatively simple, producing a core-spun yarn with a sheath spirally wrapped around the core layer in a single forming operation. This method is highly efficient and does not require complex equipment or devices.

[0035] In the present invention, there is no special restriction on the positions of the rotating twist disk and the two-for-one twisting aluminum can. For example, the rotating twist disk can be located below the two-for-one twisting aluminum can. That is, in the present invention, the positions from top to bottom can be the yarn guide ring, tensioner, two-for-one twisting aluminum can and rotating twist disk.

[0036] In some embodiments, the first yarn and the second yarn are independently selected from one of chemical fiber yarn, natural fiber yarn, and blended yarn. Chemical fiber yarn may be synthetic yarns such as polyester, nylon, spandex, and polypropylene; natural fiber yarn may be cotton yarn, linen yarn, silk yarn, wool yarn, etc.; and blended yarn may be a blend of chemical fiber and natural fiber, a blend of different chemical fibers, or a blend of different natural fibers.

[0037] In some embodiments, the first yarn is selected from natural fiber yarns, and the second yarn is selected from chemical fiber yarns. Natural fiber yarns are skin-friendly and comfortable, but they also have disadvantages such as low strength and susceptibility to environmental deterioration. Chemical fiber yarns offer advantages such as high strength, adjustable performance, and excellent durability. The core-spun yarn of the present invention, which uses a natural fiber yarn as the core and a chemical fiber yarn as the sheath, combines the characteristics of natural and chemical fiber yarns, resulting in better overall performance.

[0038] In some embodiments, the first yarn is selected from cotton fiber yarn, and the second yarn is selected from polyester yarn. Cotton fiber yarn has the characteristics of good moisture absorption and breathability, soft skin-friendly, good dyeability, and good heat resistance, but also has shortcomings such as poor wrinkle resistance, poor elasticity, and poor light resistance. Polyester yarn has the characteristics of high strength, strong durability, good wrinkle resistance, good chemical resistance, and good stability, but has shortcomings such as poor moisture absorption and breathability, poor dyeability, and poor antistatic properties. The core-spun yarn of the present invention uses cotton fiber yarn as the core and polyester yarn as the sheath, combining the characteristics of cotton fiber and polyester fiber, compensating for their respective shortcomings, and having good overall performance.

[0039] In some embodiments, the first yarn is pre-reeled onto an FDY paper tube, and the second yarn is pre-reeled onto a two-for-one twisted aluminum tube;

[0040] The FDY paper tube and the twisted aluminum tube are independently cylindrical, and the FDY paper tube and the twisted aluminum tube are coaxially arranged, and the diameter of the twisted aluminum tube is smaller than the diameter of the FDY paper tube.

[0041] There is no particular restriction on the placement of the FDY paper tube and the twisted aluminum tube. For ease of processing, the twisted aluminum tube is placed above the FDY paper tube. The diameter of the twisted aluminum tube can be 0.8, 0.6, 0.5, 0.4, or 0.3 times the diameter of the FDY paper tube.

[0042] In some embodiments, after passing through the tensioner and before passing through the bottom of the rotating twisting disc, the second yarn also passes through the two-for-one twisting aluminum tube and the FDY paper tube in sequence. In the present invention, the yarn guide ring, the tensioner, the two-for-one twisting aluminum tube, the FDY paper tube, the rotating twisting disc, and the two-for-one twisting aluminum can can be coaxially arranged and coaxially arranged along the Z-axis direction. The yarn guide ring is located above the tensioner, the tensioner is located above the two-for-one twisting aluminum tube, the two-for-one twisting aluminum tube is located above the FDY paper tube, and the FDY paper tube is located above the rotating twisting disc. The bottom of the FDY paper tube and the bottom of the two-for-one twisting aluminum can can be at or approximately at the same horizontal plane, which facilitates the twisting process of the second yarn and the winding and wrapping of the first yarn.

[0043] In some embodiments, the tensioner is a steel ball tensioner;

[0044] The ball tensioner is equipped with three 6# steel balls. The ball tensioner adjusts the yarn tension through friction between the balls and the yarn, ensuring a stable tension value during processing, thereby improving product quality, including weaving uniformity and wrapping uniformity.

[0045] In some embodiments, the twisted aluminum can is cylindrical, the twisted aluminum can and the FDY paper tube are coaxially arranged, and the diameter of the twisted aluminum can is larger than the diameter of the FDY paper tube;

[0046] The second yarn is passed through the bottom of the two-for-one twisted aluminum can.

[0047] The second yarn passes through the tensioner from the two-for-one twisted aluminum tube upward and from top to bottom, and then passes through the two-for-one twisted aluminum tube, FDY paper tube, and rotating twist disk downward in sequence. After passing through the rotating twist disk, it passes through the bottom of the two-for-one twisted aluminum can, and then passes through the yarn guide ring upward along the outside of the two-for-one twisted aluminum can. Under the twisting action of the rotating twist disk, the second yarn is spirally wrapped around the first yarn passing through the yarn guide ring to form a core-spun yarn.

[0048] In some embodiments, the diameter of the twisted aluminum can is 1.2 times or more the diameter of the FDY paper tube. For example, the diameter of the twisted aluminum can is 1.2 times, 1.5 times, 1.8 times, 2 times, 2.5 times, 3 times, 3.5 times, 4 times, 4.5 times, 5 times, etc. the diameter of the FDY paper tube.

[0049] In some embodiments, the twisting is performed by rotating a twisting disk, the twisting is performed in the Z-axis direction, at a speed of 5000-7000 rpm and a twist rate of 100-600 twists per meter. The twisting disk is rotated to perform twisting on the second yarn, and the twisting speed (i.e., the speed of the rotating disk) can be 5000 rpm, 5500 rpm, 6000 rpm, 6500 rpm, 7000 rpm, etc., and the twisting can be 100 twists per meter, 200 twists per meter, 300 twists per meter, 400 twists per meter, 500 twists per meter, 600 twists per meter, etc.

[0050] The technical solution of the present invention is further described and illustrated below based on various embodiments. Unless otherwise specified, the parts in the following embodiments are parts by weight.

[0051] Example 1

[0052] As attached Figure 1 As shown, the two-for-one twisting device of this embodiment includes a yarn guide ring 1, a tensioner 2, a two-for-one twisting aluminum tube 3, an FDY paper tube 4, a rotating twisting disc 6, and a two-for-one twisting aluminum can 5. The yarn guide ring 1, the tensioner 2, the two-for-one twisting aluminum tube 3, the FDY paper tube 4, the rotating twisting disc 6, and the two-for-one twisting aluminum can 5 are coaxially arranged. The yarn guide ring 1 is located above the tensioner 2, which is located above the two-for-one twisting aluminum tube 3. The two-for-one twisting aluminum tube 3 is located above the FDY paper tube 4. The bottoms of the FDY paper tube 4 and the two-for-one twisting aluminum can 5 are on the same horizontal plane, and the FDY paper tube 4 is located above the rotating turntable 6.

[0053] The first yarn is 50S short-fiber combed cotton, which is rewound onto an FDY paper tube 4.

[0054] The second yarn is 50 / 36 FDY polyester, which is rewound onto the two-for-one twisted aluminum tube 3.

[0055] Three #6 steel balls are placed in the tensioner 2, and the yarn guide ring 1 uses a balloon-shaped magnetic guide. The twisting process is set at 6200 rpm, 400 twists / meter in the Z direction, and no steaming is performed. The diameter of the twisted aluminum tube 3 is 0.5 times that of the FDY paper tube 4, and the diameter of the twisted aluminum can 5 is 3 times that of the FDY paper tube 4.

[0056] As attached Figure 2 As shown, the first yarn passes directly from bottom to top through the yarn guide ring 1 from the FDY paper tube 4. The second yarn passes obliquely upward and from top to bottom through the tensioner 2 from the two-for-one twisted aluminum tube 3, then downward through the hollow structure of the two-for-one twisted aluminum tube 3 and the hollow structure of the FDY paper tube 4, enters and passes through the rotating twisting disk 6, and then passes through the bottom of the two-for-one twisted aluminum can 5. It then passes obliquely upward and from bottom to top along the outside of the two-for-one twisted aluminum can 5 through the yarn guide ring 1, and combines with the first yarn that passed through the yarn guide ring 1 to form a single yarn, i.e., the second yarn covering the core-spun yarn of the first yarn.

[0057] The core-spun yarn of this embodiment has a structure in which the second yarn is spirally wrapped around the outer surface of the first yarn. The core-spun yarn obtained in this embodiment has the effect of cotton yarn and has enhanced toughness and wear resistance.

[0058] The core-spun yarn obtained in this embodiment has a density variation coefficient of 0.6%, a breaking strength of 3.85 cN / dtex, a breaking strength variation coefficient of 2.95%, a breaking elongation of 29.24%, and a breaking elongation CV of 2.91%.

[0059] Example 2

[0060] The difference between this embodiment and embodiment 1 is that in embodiment 1, the two-for-one twisting process is set to 6500 rpm, 500 twists / m, Z direction, and no yarn steaming. The remaining steps remain unchanged.

[0061] The core-spun yarn obtained in this embodiment has a density variation coefficient of 0.8%, a breaking strength of 3.81 cN / dtex, a breaking strength variation coefficient of 2.77%, a breaking elongation of 28.39%, and a breaking elongation CV of 2.96%.

[0062] As described above, the basic principles, main features, and advantages of the present invention are shown and described. Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. In other words, equivalent changes and modifications made within the scope of the present invention and the contents of the specification should still fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a core-spun yarn, characterized in that: include: The first yarn as the core passes directly through the yarn guide ring; The second yarn as the sheath passes through the tensioner, the bottom of the rotating twisting disk, the double-twisting aluminum tank and the yarn guide ring in sequence, and is double-twisted with the first yarn passing through the yarn guide ring to form a core-spun yarn; The yarn guide ring is located above the tensioner, and the tensioner is located above the rotating twisting disc and the two-for-one twisting aluminum can; The core-spun yarn is formed by covering the first yarn with the second yarn.

2. The method for preparing the core-spun yarn according to claim 1, wherein: The first yarn and the second yarn are independently selected from one of chemical fiber yarn, natural fiber yarn and blended yarn.

3. The method for preparing the core-spun yarn according to claim 1, wherein: The first yarn is selected from natural fiber yarns, and the second yarn is selected from chemical fiber yarns.

4. The method for preparing the core-spun yarn according to claim 3, wherein: The first yarn is selected from cotton fiber yarn, and the second yarn is selected from polyester yarn.

5. The method for preparing the core-spun yarn according to claim 1, wherein: The first yarn is pre-reeled onto an FDY paper tube, and the second yarn is pre-reeled onto a two-for-one twisted aluminum tube; The FDY paper tube and the twisted aluminum tube are independently cylindrical, and the FDY paper tube and the twisted aluminum tube are coaxially arranged, and the diameter of the twisted aluminum tube is smaller than the diameter of the FDY paper tube.

6. The method for preparing core-spun yarn according to claim 5, characterized in that: After the second yarn passes through the tensioner and before passing through the bottom of the rotating twisting disc, the second yarn also passes through the two-for-one twisting aluminum tube and the FDY paper tube in sequence.

7. The method for preparing core-spun yarn according to claim 1, characterized in that: The tensioner is a steel ball type tensioner; Three 6# steel balls are arranged inside the steel ball tensioner.

8. The method for preparing core-spun yarn according to claim 1, characterized in that: The twisted aluminum can is cylindrical, the twisted aluminum can and the FDY paper tube are coaxially arranged, and the diameter of the twisted aluminum can is larger than the diameter of the FDY paper tube; The second yarn passes through the bottom of the two-for-one twisted aluminum can.

9. The method for preparing core-spun yarn according to claim 8, characterized in that: The diameter of the twisted aluminum can is 1.2 times or more of the diameter of the FDY paper tube.

10. The method for preparing core-spun yarn according to claim 1, wherein: The two-for-one twisting is performed by the rotating twisting disc, and the two-for-one twisting is in the Z-axis direction, 5000-7000 turns / min, and 100-600 twists / meter.

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