WO2013106967A1

WO2013106967A1 - Process for mercerizing cotton strip and mercerization device therefor

Info

Publication number: WO2013106967A1
Application number: PCT/CN2012/000482
Authority: WO
Inventors: 朱国民
Original assignee: 无锡市天然绿色纤维科技有限公司
Priority date: 2012-01-20
Filing date: 2012-04-11
Publication date: 2013-07-25
Also published as: CN102704225A; CN102704225B

Abstract

Disclosed are a process for mercerizing cotton strips and a mercerization device therefor, belonging to the technical field of textiles. The process is as follows: a. pre-treatment of the cotton strips: wetting the cotton strips, and dewatering or wringing, so as to prepare wet cotton strips having a certain liquid loading; b. reeling of the cotton strips: reeling the wet cotton strips on a hank reeling machine, and fixing the cotton strips with tie bands; c. coating: coating the tied cotton strips with a wrapper, such that the cotton strips are integrated with the wrapper; d. mercerization: mercerizing same by concentrated spraying and instant squeezing. The cotton strips are effectively mercerized by the wetting of the cotton strips and the addition of powerful and concentrated spraying and instant squeezing, such that the base loading on the cotton strips is always under control, thereby preventing the cotton strips from being dissolved due to over-swelling and solving the problem that the cotton strips cannot be mercerized in an untwisted state. The mercerized cotton strips are glossy and bright, are fluffy to the touch, and have a 20-30% increase in the colour yield of dyeing.

Description

Method for producing sliver mercerizing and mercerizing device thereof

[0001] The present invention relates to a method for mercerizing cellulose fibers and a mercerizing device thereof, and more particularly to a method for processing a sliver of a sliver and a mercerizing device thereof.

Background technique

[0002] Mercerized means that the yarn or sliver gives a certain tensile tension under the action of concentrated alkali to cause irreversible swelling, so that the cross section of the fiber has an oblate shape and a circular shape, and the degree of orientation is improved, so that after the mercerizing The fabric or yarn strength is improved, the surface is glossy, and the color yield and fabric dimensional stability are improved. Since the sliver does not have its own strength after the machine is lowered, it is only formed by the mutual arrangement of the fibers, so that the stranding and skeining can not be used, so that the sliver can not be effectively mercerized. According to patent data, the tampon is used for twisting or several tampons are twisted to each other to form a rope and then mercerized, and then untwisted, torn into cotton fibers and then spun. The method can carry out the mercerizing of the sliver, but has the following major defects: 1. The twisting of the sliver makes the originally arranged cotton fiber return to the state of chaotic yarn, and the method of mixing cotton and combing can be carried out again. The loss is doubled, the spinning cost is greatly increased, and the difficulty of carding is greatly increased by the twisting of the sliver. 2. After the twisting, it must be untwisted, which obviously increases the workload, and the added twist can not be too small, otherwise it is difficult to stretch and produce luster, which causes the fiber to be greatly distorted, and the card and roving of the rear track. And the spinning process brings great difficulty, and it is easy to appear that the comb is not open, the big neps and the strip are poor. 3, due to the sliver in the sliver, the amount of alkali is too large, causing the hairiness of the surface to shrink into the alkali tank will block the mercerizing machine pipeline.

Summary of the invention

[0003] The present invention provides a method for producing mercerized cellulose fibers and a mercerizing device thereof, which adopts a sliver to increase the strength of the wet, and concentrates the spray and instantaneously extrudes the effective sliver of the sliver, and always controls the sliver on the sliver. With the amount of alkali, it will not melt the sliver and cause it to melt, which solves the problem that the sliver can't be mercerized in the state of no twist. The mercerized sliver has bright luster, fluffy feel, and the dyeing color is increased by 20%~30. %.

[0004] In order to solve the above technical problems, the present invention provides the following technical solution - a method for producing sliver mercerizing, the method is as follows: a. sliver pretreatment: the sliver is wetted and dehydrated or squeezed, To produce a wet sliver with a certain liquid-bearing rate, which can be carded or combed before being wetted; b. a ratter: the wet sliver is shaken on a shaker and the sliver is Fixing is fixed by tie wire; c. Coat: Wrap the stranded cotton sliver with a cloth to make the sliver and the cloth as a whole; d. Mercerizing: using concentrated spraying and instant extrusion Mercerized.

[0005] Concentrated spray means that the lye is concentrated on the tampon through the holes in the pipe, and the other parts are not in contact with the alkali. Liquid, thereby reducing the dissolution of the non-reactive portion of the sliver. Instant squeezing means that the sliver is squeezed out by the squeezing roller immediately after spraying the alkali to instantly reduce the liquid carrying rate on the sliver, thereby reducing the dissolution and breakage of the sliver. The non-reactive portion means a portion where the sliver is not swollen with alkali and causes swelling and alkali shrinkage. Specifically, while the alkali spray pipe is continuously spraying the alkali on the sliver, the roller only rotates counterclockwise, ensuring that the sliver is squeezed into the interior immediately after being wetted by the alkali, so that the inner and outer layers of the sliver are dipped. The alkali is consistent, and at the same time, the alkali amount of the sliver is reduced at the fastest time, and the alkali shrinkage of the surface cotton fiber is reduced. The conventional yarn mercerizing machine immerses the yarn in half in the alkali, and then performs the effect of positive and negative soaking, alkalizing and stretching to achieve mercerizing through the roller, which is not suitable for cotton fiber mercerizing, because there are too many alkali soaking parts. And too long will dissolve the sliver.

[0006] In the step a, the wetting refers to: soaking the sliver in water or an aqueous solution containing the penetrant LFD-30 to sufficiently wet it. Further, the liquid carrying rate after dehydration or water squeezing is 50 to 60%. The wetting is beneficial to increase the tension of the sliver, and it can be twisted without breaking by means of high-speed shaking, which solves the problem that the strength of the single sliver is poor and cannot be shaken. The liquid carrying rate refers to the percentage of the weight of the liquid carried on the sliver as a percentage of the total weight of the sliver.

[0007] In step b, the twisting weight of the sliver is controlled to have a dry weight of 250 to 1000 g and a frame length of 120 to 140 cm.

[0008] In the step _C , the material used for the wrapping is a chemical fiber material, preferably polyester cloth or nylon, and the weaving method is a woven or knitted structure, and the tensile length that can be withstood is controlled within 3%, and the circumference of the sewing is The length of the frame is the same, and the spreading length is 3 times the width of the twisted sliver. One way to go, the package is "one fold inside, two fold outside."

[0009] In step d, the mercerized alkali is concentrated at 26 to 30 Baume, the mercerizing time is 120 to 180 s, the stretching length of the two rollers is controlled at 0.5 to 3%, and the pressure of the squeezing roller is 1.5 to 1. 3.0 kg, hot water wash temperature is 70~80Ό, hot water wash time is 40~60s, cold water wash time is 20~40s. The cold water refers to liquid water which is not subjected to any temperature rise or temperature drop treatment at normal temperature.

[0010] The mercerizing device used in the mercerizing method includes a pressing roller 1 , a stretching roller 2 , a spray alkali pipe and a water spray pipe, and the pressing roller is located above the side of any one of the stretching rollers, and pulls The rotation direction of the stretching roller is opposite; the alkali spraying port is provided at one end of the spraying alkali pipe, the alkali spraying port is located at the pressing end of the mercerizing material at the boundary between the pressing roller and the stretching roller, and the other end is connected with the alkali tank; There is a spout, the spout is adjacent to the mercerized material, and the other end is connected to the sink. The two rollers are responsible for fixing and stretching the stranded mercerized material, and can only rotate counterclockwise to achieve the purpose of instantaneous alkali extrusion, which can reduce the amount of alkali of the mercerized material, thereby reducing shrinkage and fracture, such as no tension. Tampon

Further, it also includes an alkali disk and a water tray which are alternately stretched and alternately located under the stretching roller, which can be realized by an existing control system, and will not be described again. The alkali tray is connected to the alkali tank, and the alkali tank is connected to the automatic alkali system. The caustic disk is ejected when the alkali is squeezed, and the water tray is retracted. The opposite is true when washing. The lye after the alkali is returned to the alkali tank through the pipe under the alkali disk, and then adjusted to the desired alkali concentration by the automatic alkali system, and reused.

[0011] The spray caustic port and the water spray port are respectively connected to the spray alkali pipe and the spray pipe through the movable interface. Set two to have active connections The alkali spray port of the mouth can concentrate the alkali spray on the mercerizing material during the mercerizing process. The active spray interface ensures that the roller is in contact with the alkali tube and provides lye for the mercerizing spray when it is lowered. When the roller is erected, the movable interface is separated from the alkali tube.

[0012] The present invention has the following advantages:

1. The sliver is shaken by adding strength to the wet, the operation is simple, the cost is low, and convenient; 2. The way of adding the sliver of the sliver is changed, and the mercerizing method of concentrated spraying and instantaneous pressing is adopted, thereby reducing the twisting, The cumbersome retreat, the forming of the sliver before and after the sliver can be maintained, and the spinning can be directly carried out after drying to improve the spinning efficiency by 30%. 3. The cotton strip is fixed by the cloth to make the sliver and the cloth become a whole. It can apply tensile tension to the untwisted sliver without breaking, and can maximize the gloss of the sliver; 4. The sliver weight and the long frame of the sliver ensure the soaking of the sliver when mercerizing , the consistency of alkali extrusion and stretching to ensure the uniformity of mercerization; 5, the sliver wrapped by mercerizing cloth avoids the problem that the alkali shrinking cotton fiber is scattered in the mercerizing machine and causes the pipe to be blocked; 6. After the mercerized cotton Due to the increase of the amorphous zone, the color depth of dyeing is 20%~30% higher than that of ordinary cotton fiber _. 7. Since the shape of the sliver itself has not changed, the yarn can be directly spun by the drawstring to avoid tearing. Flour The method of reprocessed fiber carding and other processes, and to reduce the difficulty of machining processes, saving time and loss, a 10% time savings, reduced loss of 30%.

DRAWINGS

The drawings are intended to provide a further understanding of the invention, and are intended to be a part of the description of the invention. In the drawing:

1 is a schematic view of the wrapping method of the step d of the method for producing a mercerized sliver according to the present invention, wherein 1 represents a wrapping cloth, 2 represents a sliver; and FIG. 2 is a schematic structural view of the mercerizing device of the present invention;

Figure 3 is a plan view of the processing apparatus of Figure 1;

Figure 4 is a front elevational view of the processing apparatus of Figure 1;

Figure 5 is a left side view of the processing apparatus of Figure 1;

Figure 2-5, 1-squeeze roll, 2-active squeeze roll (stretching roller), spray nozzle No. 3-1, 4-passive squeeze roll (stretching roller), 5-1 spray Tube, 6-2 spray alkali pipe, 7-2 spray pipe, 8-alkali plate, 9-water pan, a-1 spray port, b-2 spray port, c-l spray Mouth, d-2 spout.

detailed description

The preferred embodiments of the present invention are described with reference to the accompanying drawings, which are intended to illustrate and illustrate the invention.

[0015] As shown in FIG. 2-5, the mercerizing mercerizing device of the tampon of the present invention comprises a pressing roller 1, two stretching rollers (active pressing roller 2 and passive pressing roller 4, respectively), and a spray pipe. (No. 1 spray alkali pipe 5, No. 2 spray pipe 6) and water spray pipe (No. 1 sprinkler pipe 3 and No. 2 sprinkler pipe 7 respectively), alkali disk 8 and water pan 9. The squeezing roller 1 is located at the upper left side of the left stretching roller and rotates clockwise; the two stretching rollers rotate counterclockwise. The pressing roller is controlled by a pneumatic system, and the pressure is 1.0 to 5.0, which can ensure that the surface of the mercerized material is not damaged by friction under the premise of sufficient alkali. The erect and fall of the roller are controlled by oil pressure.

[0016] One end of the spray alkali pipe is provided with two spray alkali ports, the spray alkali port and the spray alkali pipe are connected through the movable interface, and the spray alkali port is located at the press-in end of the mercerized material at the junction of the squeeze roller and the stretch roller, and the other end It is connected with the alkali tank; the alkali spray cooling system (not shown) is also arranged on the spray pipe, and the temperature of the alkali liquid is controlled at 18~20 °C. There are two water spouts at one end of the sprinkler pipe. The spout is connected to the sprinkler pipe through the movable interface. The spout is adjacent to the mercerized material, and the other end is connected to the sink. The sink and the automatic liquid level control system and the water temperature control system (Figure Not shown) Connection. The spray nozzle is a tubular structure, the number of perforations on each of the holes is 50, and the diameter of the perforations is 2 mm; the spout is also a tubular structure with 40 perforations per hole and a diameter of 1.5 mm.

[0017] The two rollers are responsible for fixing and stretching the twisted mercerized material, and can only perform counterclockwise rotation to achieve the purpose of instantaneous alkali extrusion, thereby reducing the amount of alkali of the mercerized material, thereby reducing shrinkage and breakage. For example, a tensionless sliver. Two spray ports with a movable interface are provided to concentrate the alkalinity on the mercerizing material during the mercerizing process. The active spray interface ensures that the roller is in the process of falling down (oil pressure control), is in line with the alkali pipe and provides lye for the wire spray, and when the roller is erected, the movable interface is separated from the alkali pipe.

[0018] Also included is an alkali disk and a water tray which are alternately stretched and are alternately positioned under the stretching roller. The alkali disk is ejected when the alkali is squeezed, and the water tray is retracted, and the water washing is reversed. The lye after the alkali is returned to the alkali tank through the pipe under the alkali disk, and then adjusted to the desired alkali concentration by the automatic alkali system, and reused.

[0019] Example 1

A method for producing a 60S/1 mercerized sliver comprising the following processing steps:

1. Pretreatment of sliver: Weigh the sliver 250g, immerse it in water and apply pressure to fully wet the sliver, then put the sliver into the dehydrator to dehydrate, so that the slug rate of the sliver is controlled at 50%; 2, the cashmere: the wet cotton sliver is twisted into 250g on the shaker, the frame length is 120cm; 3, cloth: wrapped in a polyester woven fabric, the width of the cloth is 120cm, the unfolding length is 57cm, as shown in Figure 1 (1 is the cloth in the figure, 2 is the twisted sliver), the bottom layer is used, and the upper layer is wrapped in two layers; 4. Mercer: On the above skein mercerizing machine The mercerizing is carried out by means of concentrated alkali spraying and instantaneous extrusion, wherein the alkali concentration is 26 Baume, the alkali spraying time is 120s, the stretching length is 3%, the pressing roller pressure is 3.0 kg, and the hot water washing is 70 °C. The time is 40s and the cold wash time is 40s.

[0020] The working condition of the mercerizing device used is as follows:

1. Put the cotton sliver, and put the above-mentioned wrapped cotton stalk with a twisted weight of 250g on the two rollers; 2. The roller falls down, and the two rollers are lie on the tensile tension under the action of oil pressure. Hook, and pre-stretched, length 120cm; 3, alkali disc extension The squeezing roller is in contact with the roller, and the roller is stretched to a set length of 135 cm. The alkali sprayer continues to spray the alkali while the roller rotates counterclockwise for 2 minutes _. 4. The alkali is stopped, the alkali pipe stops spraying the alkali, and the roller continues. Rotate the alkali for 40s counterclockwise; 5. Wash with hot water, retract the alkali disc, extend the water tray, rotate the roller counterclockwise, spray hot water on the water pipe, water temperature 70. C, washing time 70s; 6, cold water washing, roller counterclockwise rotation, water pipe spray, water washing time 40s; 7, squeeze water, roller counterclockwise rotation, squeeze water for 20s; 8, roller shrink to 120cin, squeeze roller and roller Separate, the roller is upright, and the sliver is removed.

Embodiment 2

A method for producing a 70S/1 mercerized sliver comprising the following processing steps:

1. Pretreatment of sliver: Weigh the sliver 500g, immerse it in water and apply pressure to fully wet the sliver, then put the sliver into the dehydrator to dehydrate, so that the slug rate of the sliver is controlled at 55 %; 2, the cashmere: the wet cotton sliver is twisted into 500g on the shaker, the frame length is 130cm; 3, cloth: wrapped in a polyester woven fabric, the width of the cloth is 130cm, unfolded length is 63cm, one layer is used on the bottom layer, and the upper layer is wrapped in two layers; mercerized: on the improved skein mercerizing machine, the concentrated light is sprayed by alkali spray and instantaneous extrusion, wherein the alkali concentration is 28 Baume. The time for spraying alkali and alkali is 140s, the stretching length is 2%, the pressure of the pressing roller is 2.0 kg, the washing with hot water is 75 °C, the time is 50s, and the cold washing time is 30s.

Embodiment 3

A method for producing an 80S/1 mercerized sliver, comprising the following processing steps -

1. Pretreatment of sliver: Weigh the sliver 1000g, immerse it in water and apply pressure to fully wet the sliver, then put the sliver into the dehydrator to dehydrate, so that the slug rate of the sliver is controlled at 60%; 2, the cashmere: the wet cotton sliver is twisted into 1000g on the shaker, the frame length is 140cm; 3, the cloth: wrapped in a polyester woven fabric, wherein the width of the cloth is 140cm, unfolded length is 72cm, using the bottom layer, the upper two layers of wrapping; mercerizing: on the improved skein mercerizing machine using concentrated alkali spraying and instant extrusion for mercerizing, wherein the alkali concentration is 30 Baume, The time for spraying the alkali is 160s, the stretching length is 0.5%, the pressure of the pressing roller is 1.5 kg, the washing with hot water is 8 (TC, the time is 60 s, and the cold washing time is 20 s.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, although the present invention has been described in detail with reference to the foregoing embodiments, to those skilled in the art It is still possible to modify the technical solutions described in the foregoing embodiments, or to replace some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A method for producing a sliver of a sliver, characterized in that the method is as follows:

a. sliver pretreatment: the sliver is wetted and dehydrated or squeezed to form a wet sliver with a certain liquid carrying rate;

b. The tampon: The wet tampon is shaken on the swaying machine and the tampon is fixed; c. Wrap: wrap the tampon in the cloth to make the tampon and the cloth become One piece; d. Mercerized: Mercerized by means of concentrated spraying and instant extrusion.

2. The method according to claim 1, wherein in the step a, the wetting refers to: immersing the sliver in water or an aqueous solution containing the penetrating agent LFD-30 to make it Fully wetted.

The method for producing a sliver of the tampon according to claim 1 or 2, wherein in the step a, the liquid carrying rate is 50 to 60%.

4. The method according to claim 1, wherein in the step b, the twisting weight of the sliver is controlled to have a dry weight of 250 to 1000 g and a frame length of 120 to 140 cm.

The method for producing sliver mercerizing according to claim 1, wherein: in the step c, the material used for the wrapping is polyester cloth or nylon, and the weaving method is a woven or knitted structure, and the tensile length control can be withstood. Within 3%, the circumference of the sewing is the same as the length of the frame, and the spreading length is 3 times the width of the twisted sliver.

The method for producing a sliver of the tampon according to claim 1 or 5, wherein in the step c, the wrapping method is “one layer folded inside and two layers folded outside”.

The method for producing sliver mercerizing according to claim 1, wherein: in step d, the mercerized alkali is concentrated at 26 to 30 Baume, and the mercerizing time is 120 to 180 s, and the two rollers are pulled. The temperature of the squeezing roller is 1. 5~3. 0 kg, the hot water washing temperature is 70~80 °C, the hot water washing time is 40~60s, the cold water washing time is 20~40s. .

A processing apparatus for mercerizing according to claim 1, comprising: one squeezing roller, two stretching rollers, a spray pipe and a water spout, wherein the squeezing roller is located in any one of the stretching rollers Above the side, and opposite to the direction of rotation of the stretching roller; one end of the spraying alkali pipe is provided with an alkali spraying port, the spraying alkali port is located at the pressing end of the mercerizing material at the boundary between the pressing roller and the stretching roller, and the other end is connected with the alkali tank Connection; one end of the spray pipe is provided with a water spray port, the water spray port is adjacent to the mercerizing material, and the other end is connected with the water tank.

9. The processing apparatus according to claim 8, further comprising: an alkali disk and a water tray alternately extending and contracting, alternately under the stretching roller.

The processing apparatus according to claim 8 or 9, wherein: the alkali spray port and the water spray port are divided into Do not connect to the spray pipe and spray pipe through the movable interface