JPS6123304B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a method for continuously pretreating a length of fabric. Conventional methods in which fabrics are pretreated continuously, that is, desizing → scouring → bleaching, are divided into steaming treatment methods and boiling treatment methods. Because the fabric is folded in large quantities and treated by directly spraying steam heat onto the fabric, the heat distribution applied to the wide fabric becomes uneven, and the pretreatment is not uniform over the entire fabric. There were disadvantages such as the tendency for tension to be applied to the fabric. In addition, since the boiling method processes the fabric in a liquid, it may wrinkle depending on the type of fabric, and tension may be applied to the fabric when it is pulled out of the liquid, resulting in poor texture and texture.
There were drawbacks such as the fabric lacking bulkiness and shrinkage properties. In order to eliminate these drawbacks, we developed a purple range that uses both steaming and boiling, but even in this purple range, tension is applied to the fabric that is pulled up from the boiling tank in the purple range, and this tension causes the fabric to be treated to stretch. This elongation was one of the problems in producing high-grade fabrics. The present invention has developed a fabric pretreatment method that solves these problems and is useful for continuous production of high-grade fabrics. That is, the main point of the present invention is to spray a pressurized heat treatment liquid onto the cloth to be treated which has been steamed in the steaming process without applying any tension to the cloth to be treated, and to carry out the boiling treatment in a non-tension state. By doing so, the drawbacks of the conventional method can be eliminated and the pretreatment can be performed uniformly over the entire surface of the fabric. The present invention will be explained in detail below based on embodiments shown in the drawings. Embodiment In FIG. 1, 1 is a moist heat treatment chamber having a fabric inlet 2 and a fabric outlet 3, and liquid seal tanks 4 and 5 are provided in the fabric inlet 2 and fabric outlet 3. The structure is such that the moist heat inside the moist heat treatment chamber does not leak outside the room as much as possible. A large number of guide rolls 7 are disposed in the upper part of the moist heat treatment chamber 1 for moving the cloth 6 to be treated in an up-and-down meandering manner and steaming the cloth 6 during this movement. At the bottom of these guide rolls 7, there is a cloth 6 to be treated which has been steamed while being transported by the guide rolls 7.
Since the boiling means 8 is an important point in the present invention, which is provided with a boiling means 8 for boiling the water, the structure and operation of this boiling means will be specifically described below. That is, 9 and 9' are two vertically spaced endless net conveyors, and the wet heat treatment chamber 1
It extends laterally within. Reference numeral 10 denotes a nozzle for spraying liquid at high pressure into the gap a formed by the upper and lower net conveyors 9 and 9'.
are arranged in a vertical staggered manner in the transport direction of the net conveyors 9, 9'. Reference numeral 11 denotes a liquid receiving tank provided at the inner bottom of the moist heat treatment chamber 1. Inside this liquid receiving tank 11, a steam blowing pipe 13 for heating the liquid 12 and a temperature controller 14 for adjusting the temperature of the liquid 12 are installed. It is provided. The liquid 12 in the liquid receiving tank 11 is ejected under strong pressure from each nozzle 10 by a pump (not shown). The treated cloth 6 is, for example, a woven fabric made of 100% polyester filament strong yarn, a jersey woven fabric, or a 65% polyester-cotton fabric.
There are various types such as 35% broad cloth. The most important thing in the present invention is the size of the gap a formed between the upper and lower net conveyors 9 and 9'. That is, while the cloth to be treated 6 supplied into the gap a formed by the upper and lower net conveyors 9 and 9' is transferred as both of the net conveyors 9 and 9' rotate, the cloth from the nozzle 10 is The size of the gap a is set so that necessary and sufficient vibration and beating force is applied to the cloth 6 to be treated by the liquid jet pressure. The size of this gap a differs depending on the type of fabric to be processed, for example, thick fabrics and thin fabrics, and also varies depending on the liquid injection pressure from the nozzle 10, but the meandering shape formed between both net conveyors due to the fluid injection pressure The purpose is to make the meandering width (equal to the gap a) of the fabric 6 as large as possible. This is because the meandering width is large, which causes effective vibrations in the rising and falling parts of the fabric 6, and this vibration causes the fabric to absorb liquid even into the fabric fibers. will be penetrated.
If the gap a between both net conveyors is narrow, effective vibration will not occur because the rising and falling lengths of the meandering fabric will be short. Furthermore, if the gap a between both net conveyors is wide, the fabric will not be struck by the net conveyor, and as a result, the fabric will not be able to form a meandering pattern within the gap a. As the fabric floats, it becomes impossible to transfer the fabric as the net conveyor rotates, and furthermore, the fabric is subjected to tension due to the liquid jet pressure. As is clear from the above explanation, the main point of the present invention is that the fabric to be treated is held between a pair of upper and lower net conveyors, and the fabric to be treated within the gap a between the net conveyors is transferred while following the rotation of the net conveyors. By applying the heated fluid from the nozzle to the net conveyors 9 and 9, effective vibration and hitting force due to liquid injection pressure can be applied. A gap a is set between the fabric and the fabric, and a fluid is sprayed onto the fabric within this gap to generate vibrations in the fabric to be treated, and the fabric is transferred to the net conveyor 9,
By applying a beating force to the cloth 9', the transferred fabric is subjected to an efficient boiling process in a state of no tension. In other words, when a fabric moves in a meandering manner under the liquid jet pressure between the upper and lower net conveyors, the larger the gap a between the two net conveyors, the longer the fabric will rise and fall. Therefore, the vibration of the fabric at the time of rising and falling is large, and effective liquid penetration is achieved, but if the gap a is made larger than necessary, the pressure surface of the fabric net conveyor will disappear, and the opposite effect will occur. Tension is applied to the fabric by the liquid jet pressure,
Furthermore, the fabric is not transferred following the rotation of the net conveyor, and furthermore, the effect of pulling the fabric against the net conveyor is lost, making it difficult to achieve the desired tension boiling effect. Therefore, when setting the gap a, it is necessary to consider the type of fabric to be treated, but when the liquid injection pressure is kept constant, the type of fabric to be treated and the size of the fabric with respect to the gap a, which was done by the present inventor, are as follows. The length of the contact surface of the net conveyor, that is, the contact pressure length b of the net conveyor per pile of meandering fabric was as shown in the following table. Condition Liquid Speed Constant 30m/sec Temperature Constant 95℃ Constant nozzle pitch 350mm Constant nozzle width 8mm Test fabric Width x length No.1 T/C gear bagin 91.8 x 103.9 No.2 T/C weather 90.6 x 104.0 No. 3 Cotton gear bagin 92.6×104.6 No.4 T/C mixed woven fabric 107.8×100.7

[Table] Therefore, from the above table, the contact pressure surface b between the fabric pile part and the net conveyor, that is, the contact pressure surface necessary to hold the fabric and transfer the fabric while maintaining a state of relaxation, for example, 120 to 85 mm. If a range is selected in which the gap a is large, it is desirable that the gap a is 50 to 200 mm.
It can be seen that within this range, a meandering pattern is formed and effective vibration occurs. A first embodiment of fabric pretreatment using the upper and lower net conveyors 9, 9' with the gap a set according to the type of fabric to be treated as described above will be described with reference to FIG. First, the liquid in the moist heat treatment chamber 1 and the liquid receiving tank 11 is
After heating to 95 DEG C., each guide roll 7 is driven and both the upper and lower net conveyors 9 and 9' are rotated in the same direction. Therefore, the cloth to be treated 6 supplied into the moist heat treatment chamber 1 is steamed while being transferred by the guide rolls 7, and then the cloth to be treated 6 is supplied into the gap a. At this time, the liquid in the liquid receiving tank 11 is injected from each nozzle 10 via a pump, so that the fabric is swollen by the heated liquid at about 95°C and transferred to both the net conveyors 9,
The web is conveyed in a meandering manner between the web conveyors 9 and 9' as the net conveyors 9 and 9' rotate. Therefore, the fabric transferred by both of the net conveyors 9, 9' is repeatedly struck by the upper and lower net conveyors under the pressure of the liquid jetted from the nozzle 10, and furthermore, when the meandering fabric rises and falls, Vibration is caused by the jetting force of the liquid, and the liquid is efficiently passed through the fabric fibers by the tension, thereby completing effective boiling, that is, pretreatment. Note that 16 is a steam injection pipe. Embodiment In FIG. 2, this embodiment differs from the previous embodiment in the structure of the steaming processing section. That is, in this embodiment, tension is not applied to the fabric even during steaming, and the conveyor 1 of the fabric 6 during steaming is
5 and the upper net conveyor 9 for transfer. Therefore, this embodiment is effective when the fabric to be pretreated is a knitted fabric because no elongation occurs during steaming. The boiling means 8 in this embodiment has the same structure and function as the boiling means 8 in the previous embodiment, so the same reference numerals as in the previous embodiment will be given and the explanation thereof will be omitted. As described above, in the continuous pre-treatment of fabric in which steaming is followed by boiling, the steamed fabric to be treated is conveyed by vertically separating endless net conveyors having liquid permeability into the gap between the two. A fabric with a diameter of 50 to 200 mm is fed into the fabric passage, transferred as the endless net conveyor rotates, and then the fabric to be processed is fed into the fabric passage from each liquid jet nozzle arranged in a staggered manner along the fabric passage. Since this is a continuous pre-treatment method for fabric in which a heated liquid is sprayed, the fabric is subjected to the injection pressure of the liquid under no tension and vibration due to the injection force, especially during boiling treatment. The fabric has the advantage that liquid can pass through it well and boiling can be done effectively and uniformly over the entire surface of the fabric.

[Brief explanation of the drawing]

Each of the drawings shows an embodiment of the apparatus used to carry out the present invention, and FIG. 1 is a sectional view of the apparatus according to the first embodiment, and FIG. 2 is a sectional view showing the second embodiment. . 1... Moist heat treatment chamber, 2... Fabric inlet, 3... Fabric outlet, 4, 5... Liquid sealed tank, 6... Fabric to be treated, 7... Guide roll, 8... Boiling means, 9, 9'... Net conveyor, 10... Nozzle, 11... Liquid receiving tank, 12
...Liquid, 13...Heating steam blowing pipe, 14...Temperature controller, 1
5... Conveyor, 16... Steam injection pipe.

Claims (1)

[Claims] 1. In continuous pre-treatment of fabrics, which involves steaming followed by boiling, the steamed fabrics are separated vertically between endless net conveyors with liquid permeability, with a gap a of 50 to 200 mm.
The heated liquid is supplied into a fabric passage of 1.5 mm and transferred as the endless net conveyor rotates, and then heated liquid is sprayed onto the transferred fabric in the fabric passage from each liquid injection nozzle arranged in a staggered manner along the fabric passage. A method for continuous pre-treatment of fabric, characterized by the step of attaching.