JPH0226978A - Warp preparation process - Google Patents

Abstract

PURPOSE:To easily perform the sizing of warp for attaining good collectability by sizing a multifilament having a specific entanglement number with a treating agent containing a sizing agent and an oil at specific concentrations using a roller-sizing process and squeezing and drying the treated multifilament to leave a specific amount of the treating agent on the multifilament. CONSTITUTION:A multifilament yarn having an entanglement number of <=40/m is sized with a treatment agent composed mainly of a sizing agent (e.g., polyacrylate), vegetable oil, etc., and having a pure component concentration of 15-25wt.% by contacting the yarn with the outer circumference of a sizing roller. The sized yarn is squeezed by passing between a pair of size-squeezing rollers, dried in a drying chamber and wound around a beam to obtain the treated yarn attached with 1-4wt.% of the treating agent (dry basis). The present warp-sizing process enables easy and uniform sizing of warp to attain excellent collectability using an energy-saving and space-saving apparatus compared with conventional sizing process. The mixing ratio of the sizing agent to the oil is preferably 9:1-6:4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a warp preparation method for preparing multifilament yarns as warp threads for textiles.

[Conventional technology]

When preparing multifilament yarns with a number of entanglements of 40 or less per meter as warp yarns, it is common to use a device like the one shown in Figure 2 to perform a full-scale sizing process during warping (for convenience, sizing method). In the figure, 1 is a sizing agent supply tank, and sizing is performed by passing the yarn through this tank. 2.3 is a sizing roller that squeezes out excess sizing agent attached to the yarn. 4 is a drying chamber, which has a built-in heater and dries the glued yarn.
7 is a beam that winds up the warp threads. In the above-mentioned full-scale sizing method, a sizing agent with a pure concentration of 10 to 13% by weight (hereinafter abbreviated as "r%") is usually used, and each size is adjusted so that the amount of sizing agent adhered after drying is 5 to 10%. Set conditions. A drying chamber 4 with a length of 8 m or more is used, and the yarn is heated and dried at a temperature of 100° C. or more for a long time. Therefore, although this method has a large amount of glue attached and sufficient warp convergence, it has the drawbacks that the energy cost required for drying is high and the equipment is large-scale. In addition, since the drying conditions are harsh, there is also the problem that the threads are thermally damaged after drying (and the texture of the resulting fabric is poor).

Therefore, in recent years, yarns having a certain number of entanglements are sometimes used as warp yarns without using the above-mentioned full-scale sizing method (for convenience, this is referred to as a "non-sizing method"). In the non-sizing method, the interlacing formed in the threads provides a certain degree of convergence, so the threads can be used as they are as warp threads. However, this convergence is considerably lower than the convergence provided by the above-mentioned full-scale sizing method, and there is a problem that it is impossible to weave a fabric with a high warp density.

In response, the present applicant has developed a simple sizing method (referred to as the "simple sizing method" for convenience), which can be called an intermediate between the full-scale sizing method and the non-sizing method, and has already filed a patent application (Patent Application No. 317799. Filed on December 15, 1988). This simple sizing method uses a device as shown in FIG.
A processing agent mainly composed of glue and oil is applied to the material by contacting with and passing through the material so that the amount of adhesion after drying is 1 to 4%, dried in a short mini-chamber 9, and wound onto a beam 7. That is what it is. This method can provide relatively satisfactory convergence compared to the non-sizing method, but since no squeezing is performed after applying the treatment agent with the sizing roller 8, the treatment agent is not applied to the intertwined portions of the yarns. The problem is that a large number of adhesive spots form, and when these are woven, warp lines occur, resulting in poor quality fabrics.

Furthermore, even if the amount of processing agent deposited as a whole is sufficient, as mentioned above, a large amount of processing agent adheres to the intertwined parts, so the processing agent tends to be insufficient in the areas between the intertwined parts. , there is also the problem that the convergence of the entire system becomes insufficient.

[Problem that the invention seeks to solve]

As described above, each of the three conventional sizing methods has advantages and disadvantages, and the reality is that no warp preparation method has been established that satisfies all aspects such as cost space, convergence, and quality of the fabric.

This invention was made in view of the above circumstances, and requires an energy-saving and space-saving device, and also provides good warp convergence and the texture of the resulting fabric.

The purpose is to provide a warp preparation method that provides good quality.

[Means for solving problems]

In order to achieve the above object, the warp preparation method of the present invention mainly consists of a sizing agent and an oil agent and has a pure concentration of 15 to 25%.
a step of preparing a treatment agent set to
A sizing step in which a multifilament yarn of 1.5 m or less is pasted in a state in which it is in contact with only the upper part of the outer peripheral surface of the sizing roller; The method includes a glue squeezing step in which the glue is squeezed by passing the glue between squeezing rollers, and the processing agent is applied to the multifilament yarn so that the amount of the processing agent attached after drying is 1 to 4%.

[Effect]

That is, in this invention, instead of a sizing agent, a special processing agent with a higher purity concentration than conventional sizing agents is used, and this processing agent is applied to the yarn through partial contact with the upper part of the outer peripheral surface of the sizing roller. Since the yarn is then passed through a glue squeezing roller, it is now possible to apply a sufficient amount of the treatment agent to the yarn evenly and uniformly. Therefore, the warp yarns do not have adhesive spots, warp lines do not appear during the weaving stage, and a high-quality fabric can be obtained. Furthermore, due to the uniform adhesion of the treatment agent, the convergence is high and there are no restrictions on the type of fabric. In addition, the amount of the treatment agent attached is set to the minimum necessary amount, and the pure concentration (solid concentration) of the treatment agent is increased to lower the moisture content, so it is difficult to use the hard Since there is no need to dry under dry conditions and no large-scale equipment is required, energy and space savings can be achieved. Moreover, there is no thermal damage to the yarn. Therefore, the characteristics necessary for warp yarns can be prepared with two preferable equipment conditions.

Next, this invention will be explained in detail.

The yarn targeted by this invention is a multifilament yarn having a number of entanglements of 40 or less per meter. This is because multifilament yarns having more than 40 entanglements/m can obtain sufficient convergence by simply applying an oiling treatment after warping, so it is sufficient to apply the non-sizing method.

In the warp preparation method of the present invention, for the above-mentioned threads,
Instead of the sizing agent used in conventional sizing, a special processing agent featuring a sizing agent and an oil agent is applied.

The above adhesive is polyacrylic ester.

Examples include polyacrylic acid, polymethacrylic acid, sodium polyacrylate, polyacrylic acid amide, and among these, polyacrylic ester is particularly preferred. Also,
Copolymers of these with various components may also be used.

Further, examples of the oil agent include vegetable oil, mineral oil, fatty acid ester, polyhydric alcohol, etc., and mixtures thereof are usually used.

The processing agent of this invention is obtained by mixing the above-mentioned thickening agent and oil agent and adding water, but it may also contain various surfactants and the like in addition to these. At this time, it is necessary to set the pure concentration of the processing agent to 15 to 25%. This pure concentration is the same as that of conventional glue (10 to 13
%). According to the research of the present inventors, the higher the concentration of the treatment agent, the less the amount of treatment agent itself attached to the yarn, which makes drying easier, and the condition of the yarn after drying is better. Because I understand. However, if the pure concentration exceeds 25%, the threads will adhere to each other during drying, resulting in poor warping.

In addition, in the above processing agent, the blending ratio of the paste agent and the oil agent is as follows:
It is preferable to set the ratio of glue:oil to 9:1 to 6:4. When the proportion of the oil agent exceeds the above range, weavability tends to be poor.

The treatment agent is applied during warping using a device as shown in FIG. In the figure, IO is for each bobbin of the creel (
The threads are pulled out one by one from the sizing roller 11 (not shown), first pass through the upper part of the outer peripheral surface of the sizing roller 11, then pass between the two opposing sizing rollers 12, and then pass through the drying chamber 13. After passing through, it is wound up by the beam 7.

That is, in this device, unlike the conventional full-scale sizing method or simple sizing method, the application of the processing agent to the yarn 10 is carried out by contacting and passing through the sizing roller 11 and the sizing roller 12.
This is done by combining the passages between. Therefore, unlike in the full-scale sizing method, the yarn 10 is not completely immersed in the size agent in the size agent supply tank l (see FIG. 2), so that an excessive amount of the yarn 10 is not supplied. Moreover, since the treatment agent is applied to the surface of the thread 10 and passed between the glue squeezing rollers 12, the treatment agent does not stick to the intertwined parts unevenly as in the simple sizing method. The treatment agent is uniformly spread during the passage between the two. As a result, it is possible to eliminate the problem of glue adhesion, which was a problem with the simple sizing method, and warp lines are not generated during weaving.・The convergence is also improved.

In addition, since the drying chamber 13 of this device is set so that the amount of treatment agent attached to the yarn is set to the minimum necessary as described above, one mini-chamber with a length of 2 to 5 m is required, similar to the conventional simple sizing method. It is often much smaller than the full-scale sizing method chamber (8 to 15 m in length). The drying conditions in this chamber 13 are 100~
It takes about 1.0 to 1.5 seconds at 150°C (there is also little thermal damage to the yarn.

In addition, when using the above-mentioned device, by adjusting the rotational speed of the sizing roller 11, the liquid level of the processing agent in the processing agent supply tank 14, etc., the amount of the processing agent deposited can be controlled relative to the weight of the fibers after drying. It is necessary to set it within the range of 1 to 4%. If it is less than 1%, sufficient convergence and smoothness cannot be imparted to the yarn lO, and if it exceeds 4%, drying becomes insufficient and weaving becomes difficult.

Next, examples will be described together with comparative examples.

[Examples 1 to 3, Comparative Examples 1 to 5] Polyester multifilament yarn (80'/48f,
The treatment agent was applied according to the method described above using 30 entanglements/m). The specific processing conditions at this time are shown below.

Number of warping yarns: 1062 Warping yarn speed: 200 m/min Treatment agent used: Sizing agent: Oil agent = 80:20 Purity concentration of treatment agent: 10% or 20% Drying chamber length
4m Drying temperature: 130° C. Then, the amount of treated coating was changed as shown in Table 1 below, and the relationship between the pure concentration of the treatment agent, the amount of the treatment agent attached, and the drying state of the warp yarns was investigated. The results are also shown in Table 1.

In addition, in order to objectively judge how the difference in the pure concentration of the treatment agent affects the drying condition of the warp yarns, the rotation speed of the sizing roller 12 and Although the liquid level of the processing agent in the processing agent supply tank 14 (see FIG. 1) was adjusted, it was not possible to obtain a completely consistent level.

(The following is a blank space) From the above results, it can be seen that when obtaining warp yarns with a proximal amount of treatment agent deposited, the higher the pure concentration of the treatment agent, the better the drying state of the yarn becomes. However, in the case of Comparative Example 4.5 in which the amount of treatment agent attached is excessive, the drying state of the yarn is not good in any case.

[Examples 4 and 5, Comparative Examples 6 to 9] Next, polyester multifilament yarn (80'/
After warping using 4B'), the total number of warp threads is 4248.
I wove habutae for books. The number of yarn entanglements and processing conditions were in accordance with Table 2 below. And for each, weavability,
Processing, quality, anti-texture, etc. were evaluated. These results are also shown in Table 2.

In addition, for each warping and weaving, the water jet loom (WJL) rotation speed is 530 rpm, and the weaving positive number is 20.
The test was carried out under the conditions that the size of the cloth was 1.3m x 60m. Furthermore, the processing agent used in the method of the present invention and the simple sizing method was a sizing agent:oil agent=80:20, and the sizing agent used in the full-scale sizing method was a normal sizing agent.

From the above results, it can be seen that according to the warp yarn preparation method of the present invention, warp yarns can be prepared in a manner that takes advantage of both the advantages of the conventional simple sizing method and the advantages of the full-scale sizing method.

[Examples 6 and 7, Comparative Example 1O-13] Next, polyester multifilament yarn (50'/
24f) was used to weave taffeta with a total number of warp threads of 5320. The number of yarn entanglements and processing conditions were in accordance with Table 3 below.

Then, each was evaluated in terms of weavability, processing and quality, and processing resistance. These results are also shown in Table 3.

In addition, for each warping and weaving, the water jet loom (WJL) rotation speed is 50 Orpm, and the weaving positive number is 20.
The test was carried out under conditions of 0 hiki. Furthermore, the processing agent used in the method of the present invention and the simple sizing method was a sizing agent:oil agent=80:20, and the sizing agent used in the full-scale sizing method was a normal sizing agent.

(Left below) From the above results, according to the warp preparation method of the present invention,
It can be seen that the warp yarns can be prepared in a manner that takes advantage of both the advantages of the conventional simple sizing method and the full-scale sizing method.

〔Effect of the invention〕

As mentioned above, this invention uses a processing agent with a high purity concentration,
Since the treatment agent is applied by bringing the yarn into contact with the sizing roller, and the yarn is passed between the sizing rollers and squeezed, the treatment agent can be uniformly attached to the yarn.

Therefore, it is possible to obtain good convergence and fabric quality that could not be achieved with conventional simple sizing methods. In addition, since the amount of treatment agent attached to the yarn after drying is kept to the necessary minimum of 1 to 4%, the yarn has good drying properties and minimal thermal damage, resulting in a product with a good texture. .

Additionally, the energy and space required for drying can be significantly simplified compared to the full-scale sizing method. Furthermore, it has the advantage that later refinement can be done easily.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the configuration of the device used in the present invention, Fig. 2 is an explanatory diagram showing the configuration of the device used in the conventional full-scale sizing method, and Fig. 3 is an explanatory diagram showing the configuration of the device used in the conventional simple sizing method. FIG. 10...Thread 11...Glue roller 12...Glue squeeze spout Patent applicant Kanebo Co., Ltd. Company representative Patent attorney Yukihiko Nishifuji Procedural amendment (voluntary) September 1, 1989 incident Indication of Patent Application No. 177745 of 1988, Figure 2, Name of the invention, Warp preparation method 3, Person making the amendment, Relationship to the case, Address, Name, Representative 4'', Agent, Figure 3.

Claims (2)

[Claims] (1) The main ingredients are glue and oil, and the purity concentration is 15 to 2.
A step of preparing a treatment agent set at 5% by weight, a step of supplying the treatment agent to the outer circumferential surface of the sizing roller, and a step of applying multifilament yarn with a number of entanglements of 40 pieces/m or less to the outer circumferential surface of the sizing roller. A sizing process in which sizing is performed by passing the thread in contact with only the upper part, and the above sizing multifilament thread is
The process includes a glue squeezing process in which the glue is squeezed by passing it between two glue squeezing rollers installed opposite each other, and the processing agent is applied so that the amount of the processing agent attached to the multifilament yarn after drying is 1 to 4% by weight. A warp preparation method characterized by adhering. (2) Claim (
1) Warp preparation method described.