Method for producing kapok scribbled by ring spinning

Abstract

The present invention discloses a method for producing kapok scribbled by ring spinning, in which the mixed raw materials of kapok fibers and other fibers are subjected to the processes of opening and scutching, carding, drawing, roving, spinning, etc., and a device of guiding cotton sliver is provided after a carding procedure, wherein the said spinning adopts a double-short-apron drafting mode, the said carding is performed twice, and the said drawing is performed twice. The blended yarns produced according to the inventive method have the superior technical indexes in terms of the single yarn breaking tenacity, single yarn elongation at break, etc. which are better than the industrial standard of cotton berber yarn. And the shell fabric produced from the product of the invention has the superior technical indexes in terms of the fabric heat retention, fabric moisture vapour transmission, fabric touching cold-warm feeling, fabric bulking intensity, fabric compressive elastic recovery ratio and fabric soft draping property, etc. which are better than those of the similar products such as the pure cotton and polyester cotton, etc.

Description

EMBODIMENT OF THE INVENTION

As an example, the technical process includes: the following processings are performed orderly with the blending fiber of kapok fiber and other fibers as raw materials: 1. opening and scutching; 2. first carding; 3. sliver lapping; 4. second carding; 5. first drawing; 6. second drawing; 7. roving; 8. spinning and 9. coning.

1. Opening and scutching: the said opening and scutching is to mix the kapok fibers and other fibers thoroughly by the combined opening and scutching machine to loosen the cotton and remove impurity matters and produce blended laps of certain weight and length for the carding process. The parameters for the process include: the weight of blended lap is 11.6 kilograms, the areal weight is 427 gram per meter, the length of lap is 24 meters.

2. First carding: the blended laps of kapok fibers and other fibers are combed finely with several pairs of needle teeth to remove the impurity matters and flock linter so that they are mixed adequately to form slivers.

The main technical parameters include: the areal weight is 20 g/5 m, the total drafting amount is 106.7 times, the cylinder speed is 300 rpm, the cylinder-cover guard gauge (mm) is 0.25, 0.22, 0.22, 0.22 and 0.25, and the doffer rotation speed is 12-13 rpm.

The desired effect is to enhance fining and combing so that the fibers are transferred smoothly.

A device of guiding cotton sliver for facilitating the accumulation of the cotton web and slivering is provided after the first carding.

3. Sliver lapping: The carded cotton slivers are merged into laps for the second carding. The main process parameters include: the areal weight of the little lap is 50 grams/5 meters.

4. Second carding: the cotton laps are subjected to second carding (re-carding) so that the blended laps of kapok fibers and other fibers are combed finely again to remove the impurity matters and flaws and be further mixed. The main process parameters are the same as the first carding.

A device of guiding cotton sliver for facilitating accumulation of the cotton web and slivering is provided after the second carding.

5. First drawing: by merging, the weight heterogeneity of the cotton slivers is further reduced, the fibers are mixed adequately and the straightness and parallelism of the fibers are increased. The steps include shortening the gauge, enhancing the pressure and slowing the speed.

The main technical parameters are shown in table 3:

TABLE 3
areal weight			Roller gauge	Belt roller
(g/5 m)	total E	behind E	(mm)	pressure (kg)
19	8.42	1.4B	10 × 20	19 × 24 × 19

Front roller has a rotational speed of 700 rpm.

6. Second drawing: by merging, the weight heterogeneity of the cotton slivers is further reduced, the fibers are mixed adequately and the straightness and parallelism of the fibers are increased.

The main technical parameters are shown in table 4:

TABLE 4
			Roller	Belt roller
areal weight			gauge	pressure
(g/5 m)	total E	behind E	(mm)	(kg)
18	8.44	1.25	10 × 20	19 × 24 × 19

Front roller has a rotational speed of 700 rpm.

7. Roving: by drafting and twisting, the dissociation degree and straightness of fibers are further improved and the areal weight of cotton slivers is reduced to make a preparation for spinning.

The main technical parameters include: the areal weight is 5 grams/10 meter, the total drafting times is 7.2, the behind drafting times is 1.2, the rotational speed of front roller is 105 revolutions, the roller gauge is 13×19×24.5, and the roving twist coefficient is 112.

The roller-cradle drafting process with two drafting fields and a front adjustment field is employed so that facilitating to improve silvering of roves and reduce flaws.

8. Spinning: after the spinning drafting, the roving strands are twisted to be wound in shape. The technological principle is short gauge and large twist.

The main technical parameters include: the roller gauge is 13×30 (mm), the spinning twist coefficient is 340, and the latter drafting times is 1.15.

The spinning adopts a double-short-apron drafting mode which can reduce the roller gauge effectively. And a lower-pin-upper-bracket mode is adopted to effectively improve the slivering of resultant yarns.

9. Coning: the flaws are removed from the yarns, and the yarns are wound into rolls.

The suitable range of the count of the blending yarn is 9.7 tex-58.3 tex (60S-10S) in the above example.

Claims

1. A method for producing kapok scribbled by ring spinning, in which the mixed raw materials of kapok fibers and other fibers are subjected to the processes of opening and scutching, carding, drawing, roving, spinning, is characterized by that, a device of guiding cotton sliver is provided after a carding process.

2. The method for producing kapok scribbled by ring spinning according to claim 1, wherein the said spinning adopts a double-short-apron drafting mode.

3. The method for producing kapok scribbled by ring spinning according to claim 1, wherein the said carding is performed twice.

4. The method for producing kapok scribbled by ring spinning according to claim 1, wherein the said drawing is performed twice.