JPS6328155B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to smoothed fiber yarns.

In general, sewing threads, weaving threads, and knitting threads using long and short fibers are greatly influenced by the smoothness between the fibers and between the fibers and the metal, which also affects the strength and feel of the thread. For example, in the case of sewing thread, when it passes through the needle hole of a sewing machine, when it comes into contact with a knitting needle, and when it comes into contact with a reed when it comes to weaving thread, smoothness of the fiber and metal is required. In addition, especially in the case of sewing thread, in the case of recent high-speed sewing, the temperature of the needle is 250℃.
It is also necessary to have heat resistance because the temperature can be as high as 300℃.

Conventionally, in order to achieve this kind of purpose, methods such as a method of using solid wax to rub the solid wax onto the yarn to adhere it, a method of using a wax emulsion and applying the emulsion to the yarn, etc. have been carried out. However, although the former has the advantage that the strength of the yarn is less reduced, it has the disadvantage that the wax does not adhere uniformly, resulting in large variations in smoothness, and the latter has the disadvantage that the wax emulsion penetrates into the fiber yarn, resulting in a decrease in strength. In addition, there are disadvantages in that the smoothness decreases during storage, or wax falls off during dehumidification of the product, causing deterioration over time. In any of these conventional methods, depending on how the fiber yarn is stored, the smoothness of the fiber yarn may deteriorate significantly within 2 to 3 months at the earliest, and friction may become a major hindrance during the use stage. This inevitably causes disadvantages such as a decrease in strength and fastness.

As a result of repeated research to eliminate the various drawbacks of such conventional methods, the present inventor discovered that all of the conventional drawbacks could be resolved by treating fiber yarns using silicone oil-based microcapsules. Ta.

That is, the present invention is directed to a silicone oil-based product produced by a secondary emulsion method, which contains silicone oil as a core material and has at least one of petroleum-based wax, low-molecular polyethylene, hardened beef tallow oil, and vegetable wax as a wall material. This relates to fiber yarn whose surface has been treated with microcapsules.

A wide variety of fiber yarns can be used as the fiber yarn used in the present invention, including all natural yarns, synthetic fiber yarns, and blended yarns thereof. Further, the fiber yarn may be either short fiber or long fiber, and it goes without saying that it can be used for textiles, knitted fabrics, sewing, etc.

The silicone oil-based microcapsules used in the present invention are manufactured by a secondary emulsion method, contain silicone oil as a core material, and contain petroleum-based wax, low-molecular polyethylene, hardened tallow oil, and vegetable wax. It is a microcapsule whose wall material is at least one of the following. As the microcapsules, microcapsules in various forms such as emulsion, paste, or solid can be used, but emulsion microcapsules are particularly preferred. As the silicone oil, various silicone oils can be used, such as methyl silicone oil, phenyl-substituted methyl silicone oil, and phenyl silicone oil. The microcapsules of the present invention use such silicone oil as a core material, and use at least one of petroleum wax, low molecular weight polyethylene, hardened beef tallow oil, and vegetable wax as a wall material, and are produced by a secondary emulsion method. Obtained by encapsulation. Here, in the secondary emulsion method, the core substance and a part of the wall material are melted and heated, and the remaining part of the wall material, a dispersing emulsifier, and water are mixed and emulsified and dispersed under heating. This method involves stirring to form microcapsules. At this time, urea, ammonium acetate, etc. are used as auxiliary wall materials, and higher alcohol type, sorbitan ester type, etc. are used as dispersing emulsifiers.
It is preferred to use surfactants of the sorbitan ether type and the polyethylene oxyblock polymer type, singly or in mixtures. The microcapsules of the present invention can be used in various forms as described above, but in the case of emulsion type, the viscosity is usually about 20 to 3000 cs/25°C, preferably about 30 to 3000 cs/25°C.
500cs/25℃, particularly preferably about 50-150cs/25℃
Preferably, the range is .

In the present invention, any method can be used to process the microcapsules into fiber threads, such as coating, dipping, etc., but a coating method using a roller method is particularly excellent. In the case of skein yarn, a method of dipping and drying is preferred. Microencapsulated silicone oil has excellent adhesion to fibers and completely adheres to them when dry.

In the fiber threads of the present invention, micro-encapsulated silicone oil plays a lubricating role by flowing out when the fiber threads come into contact with metal or between the fiber threads during weaving, knitting, and sewing, and when used, it plays a lubricating role. Demonstrates the effect of

The treated fiber yarn of the present invention has excellent smoothness, strength, and fastness, and at the same time, these excellent properties do not change during storage and have excellent storage stability. It also has excellent heat resistance that can withstand knitting and woven fabrics, which is an unprecedented and remarkable effect.

Examples of the present invention will be described below. Note that parts simply represent parts by weight.

Example 1 40 parts of polymethylsiloxane and 10 parts of low-molecular-weight polyethylene are melted and heated at 130 to 135°C and stirred with a high-speed rotating mixer. Add 5 parts of urea and gradually cool to lower the temperature to around 90°C. Separate petroleum wax
30 parts and 15 parts of oleyl ether type surfactant at 90℃
55 parts of hot water is added to this to make an emulsified dispersion, which is added to the polyethylene mixture and mixed and stirred to obtain 150 parts of a microencapsulated emulsion.

The resulting emulsion is rolled into cotton using a roller method.
100%, applied to No. 60 sewing thread to obtain surface-treated processed thread.

Example 2 40 parts of polymethylsiloxane and 5 parts of petroleum wax
5 parts of urea are added while stirring with a high-speed rotating mixer, and 7 parts of a sorbitan ester type and sorbitan ether type surfactant (1:2) are added and stirring is continued. 20 parts of low-molecular-weight polyethylene that has been separately heated to 130°C is mixed with 5 parts of a polyethylene oxyblock polymer type surfactant in boiling water.
A polyethylene emulsion is prepared by emulsifying and dispersing the mixture into 75 parts, and this is added to the petroleum-based wax mixture and mixed and stirred to obtain a microcapsule emulsion. Using this, a surface-treated textured yarn was obtained in the same manner as in Example 1.

Example 3 40 parts of polymethylsiloxane, 5 parts of hardened beef tallow oil, and 10 parts of a polyethylene oxyblock type surfactant and a sorbitan ester type surfactant (2:1) were stirred at 80°C in a high-speed rotating mixer. do. Separately, 20 parts of vegetable wax was added to 75 parts of boiling water containing 5 parts of a higher alcohol type surfactant to create an emulsion, and this was added to the above hydrogenated tallow oil mixture and mixed and stirred to create a micro An encapsulated emulsion is obtained. Using this, a surface-treated textured yarn was obtained in the same manner as in Example 1.

Test example Processed thread obtained in Example 1, sewing thread with solid wax rubbed and attached (Comparative Example 1), and sewing thread coated with wax emulsion (Comparative Example 2)
The smoothness of these samples and their changes over time after one year of storage were investigated using the following. The smoothness is expressed by a smoothing resistance value (unit: g), and the smaller the value, the better the smoothness. The results are shown in Figures 1-3.
In the figure, the thin line shows the results of the sewing thread immediately after production, and the thick line shows the results of the sewing thread after one year.

FIG. 1 shows the results of the processed yarn of Example 1, and it can be seen from the figure that the smoothing resistance value is small and the smoothness is excellent, and the smoothness is uniform with almost no variation. Furthermore, it can be seen that there is almost no change in smoothness after one year, indicating that it has excellent storage stability.

FIG. 2 shows the results of the sewing thread of Comparative Example 1, and it can be seen from the figure that the smooth resistance value is large and there is also extremely large variation, indicating that uniformity is poor. It is also found that the storage stability is rather poor.

Figure 3 shows the results for the sewing thread of Comparative Example 2, and the figure shows that the variation in smooth resistance value is smaller than that of Comparative Example 1.
It can be seen that the value is even larger, although not by much, and the smoothness is poor. It is also clear that the storage stability is even worse than that of Comparative Example 1.

Next, polymethylsiloxane (silicone oil)
Sewing thread surface-treated in the same manner as in Example 1 (Comparative Example 3) using
Using sewing thread (Comparative Example 4) whose surface was treated in the same manner as in Example 1 using microcapsules prepared according to the method (however, sodium alginate was not used), the smoothness of these threads and their 6-month storage were evaluated. Changes over time were investigated in the same manner as above. The results are shown in FIGS. 4 and 5. In each figure, the thin line shows the results immediately after fabrication, and the thick line shows the results after 6 months.

FIG. 4 shows the results of the sewing thread of Comparative Example 3, and it is clear that the smoothing resistance value was large and varied, the uniformity was not sufficient, and the storage stability was extremely poor. In addition, Fig. 5 shows the results of Comparative Example 4, and although the storage stability is improved compared to Comparative Example 3, the smoothness is extremely poor compared to Example 1 (Fig. 1). In addition, it is clear that there are large variations and that the storage stability is insufficient.

As a result, when sewing with the sewing thread of the present invention, it has excellent smoothness and heat resistance, and can be sewn smoothly with almost no thread breakage, but when sewing with the thread of each comparative example, The frequent occurrence of yarn breakage, which results in the necessity of stopping the machine each time, is a serious drawback in practice, and therefore the contribution of the present invention to this field is extremely large.

As described above, the fiber yarn of the present invention exhibits remarkable effects compared to conventional yarns.

[Brief explanation of the drawing]

1 to 5 are graphs showing the smoothness of the fiber yarns obtained in Example 1 and Comparative Examples 1 to 4 and their changes over time.

Claims (1)

[Claims] 1 The surface is made of silicone oil-based microcapsules manufactured by a secondary emulsion method that contain silicone oil as a core material and have at least one of petroleum wax, low-molecular polyethylene, hardened beef tallow oil, and vegetable wax as a wall material. treated fiber yarn.