CN104805559A - Method for spinning double-twisted short-fiber single yarns by twice twisting with ring spinning frame - Google Patents

Abstract

The invention discloses a method for double-twisting short-fiber single yarn by double-twist spinning on a ring spinning machine, which belongs to the application technical field of yarn forming in the spinning industry. It aims to create a new forming method of staple fiber single yarn, change the distribution of fibers in ordinary ring-spun yarn, and form a unique yarn structure and appearance. The first twisting obtains a strong twist base yarn, and the second twisting wraps the short fiber in reverse to the base yarn and makes the base yarn form ripples on the surface of the yarn due to partial untwisting and elongation, while the sliver is stable double-twisted structure. A variety of characteristic single yarns can be developed through the combination of base yarns and outsourcing fiber varieties and colors. The invention can improve the structure of the single yarn of the ring-spun staple fiber, increase the composite mode between the staple fibers, and enrich the varieties of the ring-spun staple fiber yarn.

Description

A method for double-twisting short-fiber single yarn by double-twisting spinning on a ring spinning frame

technical field

The invention discloses a method for double-twisting short-fiber single yarn by double-twist spinning on a ring spinning machine, which belongs to the application technical field of yarn forming in the spinning industry.

Background technique

The ring spinning machine can apply Z twist or S twist to the sliver according to the rotation direction of the traveler on the steel ring. Generally, the single yarn is twisted at one time, and the short fibers in the spun ring-spun single yarn are mostly helical. The line arrangement, the appearance and composition of the sliver are relatively simple.

The technology of twisting the twisted short fiber single yarn is called double twisting. The second twisting must meet two conditions: (1) the twist direction is opposite to the first time; (2) feeding After the staple fiber roving is drawn, the first twisted single yarn is reverse wrapped. The inner and outer fibers of the single yarn spun by this method have a double-twisted structure.

A double-twisted staple fiber single yarn spun by double-twisting on a ring spinning machine is composed of a base yarn and an outer fiber. The first twist is for the base yarn, and the base yarn must have a larger twist so that part of the twist can be receded during the second reverse twist. The second twisting is to realize the reverse wrapping of the base yarn by the outsourcing fiber. Wrapped on the surface of the base yarn in the opposite direction, the slightly elongated base yarn will protrude between the outer fibers and form ripples on the appearance of the sliver, and the moderate wrapping of the outer fibers will form a stable double-twisted single-yarn structure.

Contents of the invention

The purpose of the present invention is to create a new short fiber single yarn forming method, change the distribution of fibers in ordinary ring-spun yarns, so as to obtain better yarn structure and performance. The invention can realize the wrapping of the short fiber on the short fiber yarn on the ring spinning machine, obtain a new structure of the short fiber yarn, and achieve the purpose of improving the performance of the yarn and increasing the variety of the yarn.

Technical scheme of the present invention

A double-twisted staple fiber yarn spun by double twisting on a ring spinning machine is composed of a base yarn and outsourcing fibers. The spinning process produces roving.

(1) First twisting: Spin strong twist base yarn, use ordinary short fiber roving, carry out strong twist design on the ring spinning frame, the twist coefficient is generally 480-550, and the twist direction can be Z twist or S twist , Spin the base yarn.

(2) The second twisting: realize the reverse wrapping of the base yarn by the outsourcing fiber. On the ring spinning frame, the outsourcing fiber roving is fed from the rear roller, and is output from the front nip through the action of the drafting device. The base yarn is directly fed from the front roller, and meets the outer fiber through the guide wheel at the front nip. The twist direction of the second twist is opposite to that of the first twist, that is, S twist or Z twist, and the twist is 40-70% of the twist of the first twist.

A kind of double-twisted staple fiber yarn spun by double-twisting on a ring spinning machine. The suitable raw material can be any variety of natural staple fiber and chemical staple fiber. According to the needs of the variety, the base yarn and the outer fiber can be the same raw material. Composition, also can adopt different fiber varieties. In order to obtain an ideal composite effect of the base yarn and the outer covering fiber, the outer covering fiber can be selected from fibers with better length and regularity.

Beneficial consequences of the invention

The double-twisted staple fiber yarn spun by double twisting on the ring spinning frame mentioned in the present invention is different from general reverse ply twisting, and its yarn structure still belongs to single yarn. At the same time, it is also different from the general core-spun yarn spinning. The core-spun yarn generally uses filaments as the base yarn. The present invention can realize the wrapping of short fibers on short fiber yarns to form a new yarn structure. The combination of varieties and colors can develop a variety of spun yarns with obvious structure and appearance characteristics.

Example 1

28tex pure cotton two-color moire yarn

(1) Spinning of strong twist natural color base yarn:

The moisture regain of pure cotton roving is 3 grams/10 meters, and the twist coefficient of spun yarn is 450.

Base yarn weight 14.5tex=1.45g/100m,

Base yarn twist Twist/10cm=1184 twist/m, twist direction Z

Actual draft of spinning frame ${\mathrm{E.}}_1=\frac{30}{1.45}=20.69,$

(2) Wrapping of base yarn by colored outsourcing fiber:

Colored pure cotton roving public moisture regain quantitative 2 grams / 10 meters,

Outsourcing fiber weight in yarn 28-14.5=13.5tex=1.35g/100m,

Twist twist T ₂ = T ₁ 60% = 710.4 twists/m, twist direction S

Actual draft of spinning frame ${\mathrm{E.}}_2=\frac{20}{1.35}=14.81$

Example 2

21tex silk/cotton composite corrugated thread

(1) Spinning of pure cotton strong twist base yarn

The moisture regain of pure cotton roving is 3 grams/10 meters, and the twist coefficient of spun yarn is 450.

Base yarn weight 14.5tex=1.45g/100m,

Spinning twist Twist/10cm=1184 twist/m, twist direction Z

Actual draft of spinning frame ${\mathrm{E.}}_1=\frac{30}{1.45}=20.69,$

(2) Wrapping of spun silk on pure cotton base yarn

Spun silk roving public moisture regain quantitative 2 grams / 10 meters,

The quantitative 21-14.5=6.5tex=0.65g/100m of spun silk in the yarn,

Twist twist T ₂ = T ₁ 60% = 710.4 twists/m, twist direction S

Actual draft of spinning frame ${\mathrm{E.}}_2=\frac{20}{0.65}=30.77$ .

Claims (4)

1. the two method of twisting with the fingers to staple fibre single thread of a ring throstle twice twisting spinning, it is characterized in that outsourcing staple fibre carries out second time oppositely looping twisting to the heavy twist base yarn of twisting through first time, to form a kind of two sth. made by twisting to structure, outward appearance is the new type yarn of ripplet.

First time twisting: spinning heavy twist base yarn, with common staple fibre rove, ring throstle carries out heavy twist design, and twist factor is generally 480-550, twists with the fingers to being that Z twists with the fingers or S twists with the fingers, spins to obtain base yarn.

Second time twisting: realize the reverse looping of outer wrapping fiber to base yarn.On ring throstle, outer wrapping fiber rove feeds from rear roller, and through the effect of drafting system, jaw exports in the past.Base yarn directly from front roller feeding, and is converged at front jaw place by guide wheel and outer wrapping fiber.The sth. made by twisting of second time twisting is to contrary with first time, and be S and twist with the fingers or Z sth. made by twisting, the twist is the 40-70% of the first time twisting twist.

2. the two method of twisting with the fingers to staple fibre single thread of a kind of ring throstle according to claim 1 twice twisting spinning, it is characterized in that base yarn raw material can be various can spinning short fiber, comprise natural fabric and chemical fibre, the rove of spinning can add heavy twist on ring throstle.

3. the two method of twisting with the fingers to staple fibre single thread of a kind of ring throstle according to claim 1 twice twisting spinning, it is characterized in that outer wrapping fiber can be various can spinning short fiber, comprise natural fabric and chemical fibre, the rove of spinning can on ring throstle drawing-off resultant yarn.

4. the two method of twisting with the fingers to staple fibre single thread of a kind of ring throstle according to claim 1 twice twisting spinning, is characterized in that base yarn raw material and outer wrapping fiber can adopt identical composition and color, also can adopt different compositions and color.