KR20040047183A - Linen-like textiles and method of producing thereof - Google Patents

Abstract

PURPOSE: Similar hemp fiber is characterized by having appearance and touch like hemp fiber, having excellent moisture absorption, preventing the generation of static electricity and having excellent tensile strength and low elongation. A manufacturing method thereof is characterized by fusing synthetic fiber parts in mixed spun yarn. CONSTITUTION: Similar hemp fiber is obtained by: mixing and spinning natural fiber and synthetic fiber having low melting point to manufacture mixed fiber; and then heating the mixed fiber at 160-220deg.C for 20-60seconds. The natural fiber is selected from the group containing cotton, silk and wool. The synthetic fiber is selected from the group containing polyester fiber and nylon fiber.

Description

Linen-like textiles and method of producing

The present invention relates to a synthetic fiber and a method for producing the same, which is capable of expressing the feel and form as a hemp fiber as a blended yarn composed mainly of natural fibers.

In Korean Patent No. 1986-0005837, there was a method of manufacturing a yarn by heat-treating a friction material after supplying two polyester yarns having different elongation and supply speed to the screening and outer layer yarns after stretching and burning them. In addition, in Korean Patent No. 2001-0054496, there is a method of manufacturing a synthetic yarn by fusing synthetic fiber yarn through heat treatment after combining synthetic fiber yarn and natural spun yarn.

However, the blend of the polyester yarns had the same effect as hemp fiber due to the physical properties of the polyester, but had the disadvantages such as poor hygroscopicity, peculiar peeling, and static electricity. The method of the spun yarn of natural spun yarn had problems such as poor workability due to temperature difference when mixing both yarns, and poor mixing ratio and poor mixing state of both fibers.

Therefore, it is a technical object of the present invention to provide a medicament and a method of manufacturing the same that can solve all the problems of the prior art as described above.

In order to solve the above problems, the present inventors mixed spinning in a fiber state of a natural fiber material and a low melting point synthetic fiber, and then heat treated near the melting point temperature of the synthetic fiber in a post-treatment process. While maintaining a uniform mixing state while fusion, it has been found that the appearance and feel, such as mass, and the effect of improving the moisture absorption rate and the prevention of static electricity due to blending with natural fibers to complete the present invention.

Figure 1 shows the change in strength with treatment time at 180 ℃ of the present invention fiber.

FIG. 2 is a side view of a medicinal yarn which is an example of the medicinal fiber of the present invention, taken with an electron scanning microscope.

3 is a cross-sectional view taken by an electron scanning microscope of a synthetic yarn which is an example of the synthetic fiber of the present invention.

Therefore, according to the present invention,

There is provided a method for producing a medicinal fiber, characterized in that the mixed fiber produced by mixing and spun a natural fiber material and low melting point synthetic fibers.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

In the present invention, after spinning and carding the natural fiber used for spinning, the draft is prepared in a sliver state, after cutting a low melting point synthetic fiber filament yarn to a certain length, carding and drafting a sliver, and then a sliver of both fibers After mixing and mixing the mixture according to the mixing ratio it can be supplied to the spinning machine to produce a blended yarn. Mixing of both fibers may be performed in a sliver state as described above or in a raw fiber state. By mixing the natural fiber material and the low melting point synthetic fiber fibers can be produced by the thermal treatment to be performed later, due to the characteristics of the natural fibers can be obtained the effect of antistatic and moisture absorption rate improvement.

The mixing ratio of the two types of fibers can be adjusted according to the characteristics of the final product of the forehead fiber, but the mixing ratio of the synthetic fibers is preferably 20 to 50%. If it is less than 20%, the effect is not sufficiently expressed, and if it exceeds 50%, it becomes difficult to maintain uniform physical properties of the yarn because of the slip phenomenon of the fiber in the mixing spinning process. In the present invention, the higher the mixing ratio of the synthetic fibers, the greater the effect of dressing.

In the present invention, the mixed spun yarn is heat-treated at 160 to 220 ° C. for 30 to 60 seconds using a combustor and a tenter heat stabilizer to fuse the synthetic fibers inside the mixed spun yarn and combine with natural fibers. Due to the combination of the natural fibers by thermal fusion of the synthetic fibers to satisfy the peculiar touch of the synthetic fibers, there is no wrinkles, washing, durability, etc. are expressed, it is possible to mass-produce high-quality synthetic yarn with excellent physical properties .

In the present invention, any one of fibers such as cotton fibers, silk fibers and wool fibers may be selected as natural fibers, and blend fibers may be prepared by selecting any one of nylon fibers and polyester fibers as the low melting point synthetic fibers. Preferred natural fibers used in the present invention are cotton fibers, synthetic fibers using low-melting point polyester in the case of mixed spinning, synthetic fibers are not fused at temperatures below 160 ° C. and synthetic fibers at temperatures above 220 ° C. Thermal deformation occurs. In addition, in less than 30 seconds, synthetic fibers inside the yarn are not uniformly thermally fused, and at 220 ° C. or more, embrittlement phenomenon such as thermal deformation or yellowing of the polyester occurs.

Natural fibers can be made of wool or silk fiber, but the processing conditions should be more careful with the processing temperature and time than cotton fiber, and low temperature (below 160 ℃), long time (more than 120 seconds) treatment Process is required and this product can make a medicinal yarn with protein natural fiber wool, hygroscopicity of silk fiber and gloss appearance. When synthetic fibers are used as nylon fibers, the effect of expression is less than that of polyester, but the dyeing effect is excellent.

In the present invention, a method of manufacturing a yarn by heat-treating the yarn as described above and weaving or knitting with a yarn that is not heat-treated may be produced in the form of a woven fabric or knitted fabric, and then the yarn fiber may be produced by the heat treatment. This manufacturing method is the same as the general T / C blended yarn manufacturing method, and does not include a separate heat treatment process, and increases the treatment temperature at the final heat setting in the dyeing process, thereby simplifying the process and reducing the heat treatment cost.

According to the present invention, the method of producing the fiber for the yarn is a cotton fiber and a 75/36 low melting polyester blend yarn, thereby obtaining a yarn fiber having physical properties such as tensile strength of 1.2 to 1.5 g / d and elongation of 3.5 to 4.5%. The yarn thus prepared is thermally treated compared to the tensile strength of 1.1 to 1.2 g / d and the elongation of 4.5 to 6.0% of 100% cotton fiber to obtain a rigid effect that is characteristic of the hemp fiber by increasing tensile strength and decreasing elongation. Can be.

Hereinafter, the following examples are given as non-limiting examples of producing the present invention fiber.

Example 1

Carding and drafting low-melting polyethylene terephthalate filaments with an average fiber length of 1.5 inches and cotton fibers with an average fiber length of 1.2 to 1.5 inches, respectively, and mixing them in a draw frame at a ratio of 20:80, followed by ring spinning machines (Quick Spin, Uster Switzerland) to prepare a yarn of 75d / 36f. The spun yarn was heat treated in a heat treatment machine (Constant T / H chamber LPH-200-SP, Daiei Co., Ltd.) for 10 to 120 seconds at a temperature of 160 to 220 ° C to prepare a yarn.

[Examples 2 to 12 and Comparative Examples 1 to 7]

As shown in Table 1, the spinning yarn or cotton yarn blended cotton fiber and low-melting polyester fiber at a ratio of 80:20 was tested by changing the heat treatment temperature and heat treatment time.

Mixed Yarn Specification Blend ratio Processing temperature Processing time Example 1 75/36 20:80 180 60 Example 2 75/36 20:80 180 20 Example 3 75/36 20:80 220 30 Example 4 75/36 20:80 220 60 Example 5 75/36 20:80 200 30 Example 6 75/36 20:80 200 60 Example 7 75/36 20:80 160 30 Example 8 75/36 20:80 160 60 Example 9 125/36 20:80 160 60 Example 10 125/36 20:80 180 60 Example 11 125/36 20:80 200 30 Example 12 125/36 20:80 220 30 Comparative Example 1 125/36 100% cotton 180 60 Comparative Example 2 125/36 100% cotton 140 10 Comparative Example 3 125/36 100% cotton 220 30 Comparative Example 4 75/36 20:80 140 60 Comparative Example 5 75/36 20:80 220 120 Comparative Example 6 125/36 20:80 140 60 Comparative Example 7 125/36 20:80 220 120

As a result of the experiment, it can be seen that the thermal fusion temperature is 160-220 ° C. and the treatment time is about 20 to 60 seconds for the complete thermal fusion. 500PCX-10, Testomatic Co., Ltd., UK) was measured under the standard condition of 2.5cm in width and 10cm in length by KS K 0520 method. The gripping distance was 7.6cm and the tensile speed was 250mm / min. The results show that the greater the heat treatment effect, the greater the bond strength with cotton fibers and low-melting polyester, which increases the strength of the composite yarn and reduces its elongation.

The color change after heat treatment was calculated using the computer color comparison (Color Eye 5500, Data Color Co., USA). It can be seen that.

Strength (gf / d) Elongation (%) Color difference (△ E) Example 1 1.55 5.97 5.29 Example 2 1.46 5.76 2.79 Example 3 1.49 5.25 15.62 Example 4 1.45 4.80 18.7 Example 5 1.51 5.56 7.84 Example 6 1.48 5.46 9.37 Example 7 1.28 5.9 1.21 Example 8 1.29 5.76 2.58 Example 9 1.33 4.39 1.87 Example 10 1.38 4.16 5.65 Example 11 1.42 4.11 5.26 Example 12 1.55 4.05 11.21 Comparative Example 1 1.34 5.84 5.5 Comparative Example 2 1.16 5.02 1.15 Comparative Example 3 1.49 4.81 14.65 Comparative Example 4 1.29 5.77 1.65 Comparative Example 5 1.43 4.30 20.68 Comparative Example 6 1.29 4.80 0.63 Comparative Example 7 1.43 3.74 23.64

As described above, according to the present invention, while the low-melting-point synthetic fiber portion is fused in the blended yarn, it has a uniform appearance and feel like hemp fiber while maintaining a uniform mixing state with natural fibers, and improves moisture absorption due to blending with natural fibers. And it is possible to prevent the generation of static electricity, there is an advantage that can produce a medicinal yarn having a high tensile strength, low elongation characteristics of the stiffness of the hemp fiber.

Claims (5)

In the manufacturing method of the medicinal fiber, A method of producing a medicinal fiber, characterized in that the mixed fiber produced by mixing and spun a natural fiber material and low melting point synthetic fiber. The method for producing a medicinal fiber according to claim 1, wherein the blended fiber is heat-treated at 160 to 220 ° C for 20 to 60 seconds. The method of claim 1, wherein the natural fiber is selected from any one of cotton fibers, silk fibers and wool fibers, low-melting synthetic fibers are selected from polyester fibers and nylon fibers to produce a mixed fiber heat treatment for the fiber Manufacturing method. 2. The method of claim 1, wherein the form of the blended fiber to be heat-treated is any one of spun yarn, woven or knitted fabric. Medical fiber obtained by the manufacturing method of claim 1.