KR102219084B1 - Interlace composite yarn with high strength and elongation and method for producing the same - Google Patents

Abstract

The present invention relates to interlace composite yarn and a method for manufacturing the same. More specifically, the present invention relates to: interlace composite yarn having high strength and elongation rate, and excellent dyeing ability, bulky feeling, touch feel, etc.; and a manufacturing method with improved productivity as the manufacturing method capable of manufacturing the interlace composite yarn.

Description

Interlaced composite yarn with high strength and elongation, and its manufacturing method {INTERLACE COMPOSITE YARN WITH HIGH STRENGTH AND ELONGATION AND METHOD FOR PRODUCING THE SAME}

The present invention relates to an interlaced composite yarn and a method for manufacturing the same, and more specifically, an interlaced composite yarn having high strength and elongation, and excellent dyeing ability, bulky feeling, and a feeling of touch, and a manufacturing method capable of manufacturing the same, with improved productivity. It relates to a manufacturing method.

Interlaced composite yarns are usually manufactured through air entanglement by supplying different types of fibers to an interlacing device using a yarn processing facility. In addition, the ITY composite yarn is manufactured by alternately forming the entanglement part and the opening part on the multifilament by using an entanglement nozzle having a structure that injects air into the middle part of the essay. That is, the conventional ITY can provide a fabric having a natural texture, excellent volume, and fairness by manufacturing different types of fibers having different characteristics by air entanglement together.

However, there is a limitation in expressing the bulky feeling, elasticity and drape of the fabric when manufacturing a woven fabric using ITY composite yarn manufactured through simple interlace processing according to the prior art as described above, or the expression of particularly vivid colors There was a disadvantage that it was difficult to produce high-quality clothing products.

In addition, in the case of polyester original yarn, it is impossible to manufacture ITY composite yarn, so in the case of fabric made from it, it is impossible to realize vivid colors. In addition, interlace unevenness occurs due to tension imbalance that occurs during the manufacture of ITY composite yarns, which leads to poor bulkiness and touch when manufacturing woven fabrics.

In addition, in the case of the drawn yarn or partially drawn yarn used for such interlaced composite yarn, polyester fibers, especially polyethylene terephthalate (PET) fibers, are widely used because of their excellent heat resistance, chemical resistance, and mechanical properties. In general, polyester fiber is a two-step spinning and drawing process in which molten polyester is extruded into a fibrous form in a spinneret, spun at a spinning speed of 1,000 to 3,500 m/min, wound, and then stretched and heat treated. ) Has been manufactured through the process.

The PET fiber manufacturing method using such a two-step process increases the size and complexity of equipment, consumes a lot of energy in the manufacturing process, and thus there has been a demand for simplification of equipment and energy saving.

Accordingly, there is a demand for a fiber capable of improving productivity while preserving excellent dyeing properties and excellent physical properties by improving a two-step process in a conventional PET fiber manufacturing process, and a manufacturing method thereof.

Republic of Korea Patent Publication No. 10-1908901 (registered on October 10, 2018)

The present invention was conceived to solve the above problems, and the first problem to be solved of the present invention is that it is possible to manufacture an interlaced composite yarn having high elongation and strength, and does not require a separate post-treatment process. It is to provide a manufacturing method that can improve productivity.

A second problem to be solved of the present invention is to provide an interlaced composite yarn having high elongation and strength, and excellent dyeing ability, bulkiness, and touch.

In order to solve the above-described first problem, the present invention (1) spinning a first partially oriented yarn (POY) composition comprising a PET main resin and a PMMA (polymethyl methacrylate) additive Forming a shrine;

(2) comprising the first partially drawn yarn, and the step of producing an interlaced composite yarn by plying and interlacing the same; including,

The step (1) provides a method for manufacturing an interlaced composite yarn, characterized in that it is manufactured by satisfying the conditions of the following relational equation 1.

[Relationship 1]

In the above relational formula 1, C represents the content of the PMMA additive in the first partially drawn yarn composition in units of weight %, and R represents the spinning speed of the first partially drawn yarn in the step (1) in mpm (meters). per minute).

According to a preferred embodiment of the present invention, the spinning speed in step (1) may be 3,000 to 6,000 mpm.

According to a preferred embodiment of the present invention, the PMMA additive may be included in an amount of 0.1 to 3 parts by weight based on 100 parts by weight of the PET main resin in the first partially drawn yarn composition.

According to a preferred embodiment of the present invention, the step (2) includes at least one selected from 1) the first partial drawn yarn and 2) the second partially drawn yarn and the Fully Oriented Yarn (FOY). It may be to let you do.

In this case, the second partial drawn yarn may have a composition different from the first partial drawn yarn, and the full drawn yarn may have the same or different composition as the first partial drawn yarn.

According to a preferred embodiment of the present invention, the second partially drawn yarn and the fully drawn yarn may have a porous structure.

According to a preferred embodiment of the present invention, at least one selected from 1) the first partial drawn yarn and 2) the second partial drawn yarn and the fully drawn yarn can be combined and intertwined in a weight ratio of 4:6 to 5:5. I can.

In order to solve the second problem described above, the present invention provides an interlaced composite yarn having an elongation of 140% or more, which is interlaced including a porous first partially drawn yarn containing a PET main resin and a PMMA additive.

According to a preferred embodiment of the present invention, the PMMA additive may be included in an amount of 0.1 to 3 parts by weight based on 100 parts by weight of the PET main resin in the first partially drawn yarn.

According to a preferred embodiment of the present invention, the interlaced composite yarn may be 1) the first partially drawn yarn 2) the second partially drawn yarn and the one that is combined and entangled with at least one selected from the fully drawn yarn.

In this case, the second partial drawn yarn may have a composition different from the first partial drawn yarn, and the complete drawn yarn may have the same or different composition as the first partial drawn yarn.

According to a preferred embodiment of the present invention, at least one selected from 1) the first partial drawn yarn and 2) the second partial drawn yarn and the fully drawn yarn may be braided and intertwined in a weight ratio of 4:6 to 5:5. have.

The interlaced composite yarn according to the present invention has high elongation and strength, and has excellent effects such as dyeing ability, bulkiness and touch.

In addition, the method for manufacturing an interlaced composite yarn according to the present invention does not require a separate post-treatment process, thereby improving productivity.

1A is a diagram schematically showing an interlacing apparatus for manufacturing an interlaced composite yarn according to an embodiment of the present invention.
1B is a schematic front view and a side view of an interlacing device for manufacturing an interlaced composite yarn according to an embodiment of the present invention.
2 is an SEM image of a cross section of an interlaced composite yarn according to an embodiment of the present invention.
3 is a SEM image photographing the surface of the interlaced composite yarn according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement the present invention. The present invention may be implemented in various different forms, and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and the same reference numerals are added to the same or similar components throughout the specification.

As described above, in the case of the ITY composite yarn manufactured through simple entanglement processing, such as the conventional interlaced composite yarn, there has been a limit to the expression of the bulky feeling, elasticity, and drape properties of the fabric when manufacturing a woven fabric.

Accordingly, in the present invention, (1) forming a porous first partially drawn yarn by spinning a first partially oriented yarn (POY) composition comprising a PET main resin and a polymethyl methacrylate (PMMA) additive; (2) comprising the first partially drawn yarn, and the step of producing an interlaced composite yarn by plying and interlacing the same; including,

The step (1) can solve this problem by providing a method for manufacturing an interlaced composite yarn, characterized in that it is manufactured by satisfying the conditions of the following relational equation 1.

[Relationship 1]

In the above relational formula 1, C represents the content of the PMMA additive in the first partially drawn yarn composition in units of weight %, and R represents the spinning speed of the first partially drawn yarn in the step (1) in mpm (meters). per minute).

That is, since the interlaced composite yarn manufactured under the above conditions can be omitted, the manufacturing facility can be simplified, manpower and energy input can be reduced, so that economical and productivity can be improved. In addition, the fabric woven using the manufactured fiber has the advantage of having a high drape property, a bulky feeling and a feeling of touch.

Hereinafter, each step will be described in order.

In the step (1), a first partially oriented yarn (POY) composition containing a PET main resin and a PMMA (polymethyl methacrylate) additive is spun to form a porous first partially drawn yarn, in which case Between the spinning speed and the content of the PMMA additive, a relationship as shown in the following relational formula 1 is established.

[Relationship 1]

In the above relational formula 1, C represents the content of the PMMA additive in the first partially drawn yarn composition in units of weight %, and R represents the spinning speed of the first partially drawn yarn in the step (1) in mpm (meters). per minute).

The first partially drawn yarn composition is made of polyethylene terephthalate (PET) resin as a main component, and the PET resin may account for 50% by weight or more of the total first partially drawn yarn composition, preferably 60% by weight Above, more preferably 70 wt% or more, more preferably 80 wt% or more, and most preferably 90 wt% or more.

In the present invention, the term "subject resin" refers to a resin that occupies the largest proportion by weight in a specific composition.

The first partial drawn yarn manufactured including the PET main resin and the interlaced composite yarn of the present invention manufactured by plying and interlacing with other fibers including the first partial drawn yarn are heat resistance, chemical resistance and mechanical properties (strength and elongation, etc.) ) Has an excellent advantage.

These PET main resins can be selected and used without limitation as long as they are a phthalic acid component and a glycol component commonly used in the textile industry, and those skilled in the art will not be difficult to use such a polymerization monomer by taking an appropriate component according to the required physical properties of the fiber. Partially drawn yarn compositions can be prepared.

Alternatively, such a PET main resin may be introduced and melted in the form of chips to form a first partially drawn yarn composition, and such chips may be selected from PET resins distributed in the market.

The first partially drawn yarn composition includes not only a PET main resin but also a polymethyl methacrylate (PMMA) additive.

In the case of the first partially drawn yarn prepared by spinning the first partially drawn yarn composition containing the PET main resin containing the PMMA additive and the interlaced composite yarn containing the same, the elongation is improved and the elasticity of the fiber is improved. When the first partially drawn yarn is formed by adding the PMMA additive, a porous structure is formed in the first partially drawn yarn, thereby increasing the elongation rate.

The PMMA additive may be included in an amount of 0.1 to 3 parts by weight based on 100 parts by weight of the PET main resin in the first partially drawn yarn composition. If the PMMA additive is included in an amount of less than 0.1 parts by weight based on 100 parts by weight of the PET main resin, elongation, elasticity, and drape properties of the prepared interlaced composite yarn may be poor. Conversely, when the content of the PMMA additive exceeds 3 parts by weight and is excessively added, there may be problems such as deterioration of the strength of the fiber and damage due to breaking of the filament during spinning.

In addition, the PMMA additive may be used with a weight average molecular weight of 20,000 g/mol to 200,000 g/mol, and if a weight average molecular weight of the PMMA additive is used lower than 20,000 g/mol, the effect of adding the additive is almost It may not be. As the weight average molecular weight of the PMMA additive increases, the above-described effect of improving the elongation rate tends to be enhanced. However, at the same time, the likelihood of damage to the filaments in the spinning process also increases. If the weight average molecular weight of the PMMA additive exceeds 200,000 g/mol, filament damage may occur in the spinning and stretching process of the first partially drawn yarn, and accordingly the manufactured interlaced composite yarn also has a problem of lowering strength and elongation. There may be.

In addition, in addition to the PET main resin and PMMA additives, the first partially drawn yarn composition may include other additives to have physical properties according to the use of the fiber. The types of these additives may be used by a person skilled in the art as long as they are generally known in the technical field to which the present invention pertains, and the types and contents and the effects obtained by including such additives will be readily understood by those skilled in the art. .

The first partially drawn yarn composition is spun to prepare a first partially drawn yarn. Melt spinning is suitable for spinning, but is not necessarily limited thereto. A person skilled in the art will be able to manufacture the partially drawn yarn in an appropriate manner by selecting the most appropriate spinneret according to the required physical properties of the fiber.

When selecting the melt spinning method, the spinning temperature is preferably a temperature of 250 to 350 ℃. In addition, it is more preferable to radiate at a temperature in the range of 275 to 325°C. If the spinning temperature is less than 250℃, there may be a problem that the PET main resin is not melted properly, resulting in poor spinning. If the spinning temperature exceeds 350℃, the PET main resin is thermally decomposed or carbonized, causing the physical properties of the fibers. There may be a problem that becomes defective and the value as a product decreases. Therefore, it is preferable to perform melt spinning at a temperature within the above range in order to prevent defects in the manufacturing process while having the desired physical properties.

The spinning speed is preferably 3,000 to 6,000 mpm (meter per minute). In order to manufacture the fiber with a certain fineness, the discharge amount must be changed according to the room speed.If the spinning speed is less than 3,000 mpm or exceeds 6,000 mpm, the spinning draft value and the fineness of the first partially drawn yarn should be kept constant. It is not possible, and there may be a problem in that the fiber is not formed properly. Preferably, the spinning speed may be 4,000 to 5,500 mpm, and more preferably, the spinning speed may be 4,500 to 5,000 mpm.

In the present invention, the term "draft" or "spinning draft" means that when a polymer (or a composition including a resin, polymer, polymer, etc.) is melt-spun to produce a synthetic fiber, the molten polymer passes through the spinneret hole and is wound. It means the elongation rate of the yarn until it becomes. That is, it means a value that can be expressed as the spinning speed/discharge speed of the molten polymer in the detention hole. The spinning draft is adjusted to 110 to 160. If it is lower or higher than 110-160, it may be difficult to spin due to difficulty in forming fibers.

However, depending on the content of the PMMA additive, the possibility of damaging the filament during spinning instead of improving the elasticity of the fiber increases.There is a need to maintain a constant relationship between the content of the PMMA additive and the spinning speed of the first partially drawn yarn composition. have.

The method of manufacturing an interlaced composite yarn of the present invention comprises the elongation and elasticity of the interlaced composite yarn, and weaving using the interlaced composite yarn by spinning while satisfying the following relational formula 1 when manufacturing the first partially drawn yarn that is plied and interlaced with the interlaced composite yarn. It is possible to implement the effect of improving the drape property, bulkiness and touch feeling of the fabric, and at the same time, it is possible to suppress the deterioration of spinning and spinning properties of the fiber.

[Relationship 1]

In the above relational formula 1, C represents the content of the PMMA additive in the first partially drawn yarn composition in units of weight %, and R represents the spinning speed of the first partially drawn yarn in the step (1) in mpm (meters). per minute).

If the C/R is less than 0.01%, there may be a problem in that the elongation rate of the interlaced composite yarn is poor, and when woven into a fabric, the bulky feeling, elasticity, and drape properties may be poor.

On the contrary, when the C/R exceeds 0.07%, there is a problem in that the first partial drawn yarn has poor yarn spinning properties, and thus the interlaced composite yarn cannot be properly formed.

The first partially stretched yarn composition spun according to the above-described composition and spinning conditions may be spun and simultaneously stretched. As described above, by forming the first partial drawn yarn in a one-step method in which the spinning and stretching processes are simultaneously performed, an interlaced composite yarn manufacturing facility can be simplified, and thus energy and labor input thereto can be saved.

According to the method of manufacturing an interlaced composite yarn according to the present invention, a separate post-treatment may not be required for the first partially drawn yarn after the spinning and stretching process described above. That is, the manufacturing process of the first partially drawn yarn may be completed with a one-step process of the spinning and stretching steps described above. Therefore, it is possible to improve productivity, and as described above, there is an effect of simplifying manufacturing facilities and reducing energy and labor.

1A is a schematic front view of an interlacing apparatus for manufacturing an interlaced composite yarn according to the present invention.

Referring to FIG. 1A, the first partially drawn yarn 10 and the fully drawn yarn 20 are interlaced with each other in the interlacing device 200 including the roller 3 210 and the roller 4 220. The process of forming the interlaced composite yarn 30 is shown.

When spinning the first partially drawn yarn composition according to the above composition and spinning conditions, a porous structure may be formed in the first partially drawn yarn.

2 is an SEM image of a cross section of an interlaced composite yarn according to an embodiment of the present invention. Referring to Figure 2, it can be seen that the interlaced composite yarn according to the present invention has a porous structure containing a plurality of pores therein.

By having such a porous structure, the elasticity and elongation of the interlaced composite yarn can be improved, and the bulky feeling, drape property, and touch feeling of the fabric woven using such fibers can also be excellent.

Next, in step (2), at least one selected from 1) the first partial drawn yarn and 2) the second partially drawn yarn and the Fully Oriented Yarn (FOY) may be combined and entangled.

In the present invention, "intertwined" means that fibers are bound by entanglement.

Interlaced composite yarn can be manufactured by combining and interlacing the above-described first partial drawn yarn with at least one 20 selected from the second partial drawn yarn and the fully drawn yarn in the interlacing device 200, and such a combination and entanglement By going through the process, it is possible to improve the strength, bulkiness and touch of the fiber.

In this case, when the first partial drawn yarn is combined and intertwined with the second partial drawn yarn, the second partially drawn yarn has a composition different from that of the first partial drawn yarn. The fully drawn yarn may have the same or different composition as the first partial drawn yarn.

Fibers such as polyester, polyamide, and polyolefin may be used for the second partially drawn yarn and the fully drawn yarn, but are not necessarily limited thereto, and preferably polyester fibers may be used in the same manner as the first partially drawn yarn. .

According to a preferred embodiment of the present invention, the second partially drawn yarn and the fully drawn yarn may also have a porous structure. When the second partially drawn yarn and the fully drawn yarn also have a porous structure, an elongation rate of the prepared interlaced composite yarn may be more excellent. In addition, the bulkiness, touch, and drape properties of the fabric woven using the interlaced composite yarn may be better.

According to a preferred embodiment of the present invention, at least one selected from 1) the first partial drawn yarn and 2) the second partial drawn yarn and the fully drawn yarn can be combined and intertwined in a weight ratio of 4:6 to 5:5. I can.

If the first partially drawn yarn is included in a weight ratio greater than 5:5, there may be a problem of shrinkage even after heat treatment due to an increase in non-shrinkage, and the first partially drawn yarn is included in a weight ratio less than 4:6. If so, latent crimp may be problematic.

Hereinafter, the interlaced composite yarn manufactured by the above-described interlaced composite yarn manufacturing method will be described. A description will be made excluding the overlapping part of the above-described method for manufacturing the interlaced composite yarn and the contents.

The present invention provides an interlaced composite yarn having an elongation of 140% or more, which is entangled including a porous first partially drawn yarn containing a PET main resin and a PMMA additive, thereby providing excellent strength, elongation, and excellent when woven into a fabric. It provides bulky, drape and touch, and can provide elastic and elastic fabric.

According to a preferred embodiment of the present invention, the PMMA additive may be included in an amount of 0.5 to 3 parts by weight based on 100 parts by weight of the PET main resin in the first partially drawn yarn.

If the content of the PMMA additive is less than 0.1 parts by weight based on 100 parts by weight of the PET main resin, there is no effect of elongation and elasticity of the interlaced composite yarn, and if it exceeds 3 parts by weight, the fiber strength decreases and the filament is damaged during spinning, etc. Sacrifice can worsen.

Although the embodiments of the present invention have been described above, these are only examples, and do not limit the embodiments of the present invention, and those of ordinary skill in the field to which the embodiments of the present invention belong are the essential characteristics of the present invention. It will be appreciated that various modifications and applications not illustrated above are possible within the range not departing from the above. For example, each component specifically shown in the embodiments of the present invention can be modified and implemented. And differences related to these modifications and applications should be construed as being included in the scope of the present invention defined in the appended claims.

[Preparation example] Manufacture of PET partially drawn yarn

Preparation Example 1

A PET resin chip (TORAY Co., Ltd. A2210) was put into a reaction vessel and heated to 290°C to prepare a molten polymer. Here, PMMA additive (IH830 manufactured by L company, T _g : 116°C, A weight average molecular weight of 115,000 g/mol) was added in an amount of 0.5% by weight (0.503 parts by weight based on 100 parts by weight of PET main resin) to prepare a first partially drawn yarn composition.

The first partially drawn yarn composition was spun at a spinning speed of about 4,000 to 5,000 mpm at a temperature of 290°C through a spinneret for forming the first partially drawn yarn. While spinning, the first partially drawn yarn was prepared by winding and stretching with a roller rotating at a speed of 4,000 to 5,000 mpm.

The spun fibers are made into partially drawn yarns through a drawing process.

The stretching process is stretching according to the temperature difference between the 1st and 2nd rolls, and the stretching ratio is 1-5 times the stretching. The temperature of the 1st roll is 70~100℃, and the 2nd roll is heat treated by giving the temperature between 100~140℃.

Preparation Example 2

Prepared in the same manner as in Preparation Example 1, except that the content of the PMMA additive was added in an amount of 1% by weight (1.01 parts by weight based on 100 parts by weight of the PET main resin) in the first partially drawn yarn composition. Partially drawn yarn was prepared.

Preparation Example 3

Prepared in the same manner as in Preparation Example 1, except that the content of the PMMA additive was added in an amount of 1.5% by weight (1.52 parts by weight based on 100 parts by weight of the PET main resin) in the first partially drawn yarn composition. Partially drawn yarn was prepared.

Preparation Example 4

Prepared in the same manner as in Preparation Example 1, except that the content of the PMMA additive was added in an amount of 2% by weight (2.04 parts by weight based on 100 parts by weight of the PET main resin) in the first partially drawn yarn composition. Partially drawn yarn was prepared.

Preparation Example 5

Prepared in the same manner as in Preparation Example 1, except that the content of the PMMA additive was added in an amount of 2.5% by weight (2.56 parts by weight based on 100 parts by weight of the PET main resin) in the first partially drawn yarn composition. Partially drawn yarn was prepared.

Preparation Example 6

Prepared in the same manner as in Preparation Example 1, except that the content of the PMMA additive was added in an amount of 3% by weight (3.10 parts by weight based on 100 parts by weight of the PET main resin) in the first partially drawn yarn composition. Partially drawn yarn was prepared.

Preparation Example 7

Prepared in the same manner as in Preparation Example 1, except that the content of the PMMA additive was added in an amount of 4% by weight (4.15 parts by weight based on 100 parts by weight of the PET main resin) in the first partially drawn yarn composition. Partially drawn yarn was prepared.

Preparation Example 8

Prepared in the same manner as in Preparation Example 1, except that the content of the PMMA additive was added in an amount of 5% by weight (5.20 parts by weight based on 100 parts by weight of the PET main resin) in the first partially drawn yarn composition. Partially drawn yarn was prepared.

Comparative Preparation Example 1

Prepared in the same manner as in Preparation Example 1, but the first partially drawn yarn composition was spun and stretched to prepare a first partially drawn yarn composition in which no PMMA additive was added to the PET main resin.

Comparative Preparation Example 2

It was carried out in the same manner as in Preparation Example 1, except that the first partially drawn yarn composition was produced by spinning and stretching the first partially drawn yarn composition with a spinning speed of 5,000 mpm.

[Example] Preparation of interlaced composite yarn

Example 1

Completely drawn yarn by producing a first partially drawn yarn by varying only the addition of the PMMA additive in an amount of 3% by weight (3.10 parts by weight based on 100 parts by weight of the PET main resin) in the first partially drawn yarn composition. (20) was prepared.

The first partial drawn yarn 10 prepared in Preparation Example 1 was interlaced with the fully drawn yarn 20 in the interlacing device 200 through a first feed roller to produce an interlaced composite yarn 30. At this time, the first partial drawn yarn 10 and the complete drawn yarn 20 were bonded and entangled at a weight ratio of 5:5.

Example 2

In the same manner as in Example 1, except that the first partially drawn yarn 10 was used in Preparation Example 2, an interlaced composite yarn was produced.

Example 3

In the same manner as in Example 1, except that the first partially drawn yarn 10 was used in Preparation Example 3, an interlaced composite yarn was produced.

Example 4

In the same manner as in Example 1, except that the first partial drawn yarn 10 was used in Preparation Example 4, an interlaced composite yarn was produced.

Example 5

In the same manner as in Example 1, except that the first partial drawn yarn 10 was used in Preparation Example 5, an interlaced composite yarn was produced.

Example 6

In the same manner as in Example 1, except that the first partial drawn yarn 10 was used in Preparation Example 6, an interlaced composite yarn was produced.

Comparative Example 1

It was prepared in the same manner as in Example 1, but the first partial stretched yarn 10 was prepared in Comparative Preparation Example 1, and the interlaced composite yarn was manufactured by differently from the point of plying and interlacing with the completely stretched yarn 20.

Comparative Example 2

It was prepared in the same manner as in Example 1, but the first partial stretched yarn 10 was prepared in Comparative Preparation Example 2, and the interlaced composite yarn was manufactured by differently from the complete stretched yarn 20 and the point of plying and interlacing.

[Experimental Example]

Experimental Example 1: Measurement of physical properties of PET partial stretched yarns of Preparation Example and Comparative Preparation Example

The following table by measuring and evaluating the fineness, tensile strength, elongation (the degree of stretching until the fibers are pulled and broken) and yarn spinning properties prepared in Examples 1 to 6 and Comparative Examples 1 to 2 It is described in 1.

Here, the elongation rate (%) is calculated according to the following relational formula 2.

[Relationship 2]

In the above relational equation 2, L _i denotes the length before pulling the fiber, and L _f denotes the length at the moment when the fiber is cut by a tensile force.

In addition, the yarn spinning property was measured under the following conditions. When spinning under the condition of adding PMMA and spinning at 4,000 to 6,000mpm, if there is no breakage of the fiber and the winding is good ◎, if there is no breakage of the fiber and the winding is broken once per hour ○, there is no breakage of the fiber and the winding is not possible. It is expressed as β when it is broken twice in an hour, and as Х when there is no breakage of the fiber and the winding is broken three times in an hour.

division PMMA content
(wt%) Relative content
(Part by weight) Spinning speed
(mpm) Fineness
(Denier) The tensile strength
(g/denier) Elongation
(%) Sacrifice Example 1 0.5 0.503 4,000 101.1 2 141.2 ◎ Example 2 One 1.01 4,000 100.6 2.1 208.6 ◎ Example 3 1.5 1.52 4,000 101.3 1.9 235.1 ◎ Example 4 2 2.04 4,000 102.2 1.7 242.6 ◎ Example 5 2.5 2.56 4,500 102.7 1.8 250.9 ◎ Example 6 3 3.10 5,000 101.6 1.9 263.3 ◎ Example 7 4 4.12 5,000 101.6 1.9 283.5 ○ Example 8 5 5.2 5,000 101.6 1.95 293.9 Х Comparative Example 1 - - 4,000 100.2 3.3 109.3 ◎ Comparative Example 2 0.5 2.56 6,000 100.4 2.3 155.1 △ "-" means that there is no data.

Referring to Table 1, it was confirmed that the elongation rate of the interlaced composite yarn of Comparative Example 1 to which the PMMA additive was not added was significantly lower than that of the interlaced composite yarn of Examples 1 to 8.

Among Examples 1 to 8, it was confirmed that the elongation rate of the fiber was improved as the PMMA content increased. However, when the content of PMMA exceeded 5 parts by weight based on 100 parts by weight of the PET main resin, it was confirmed that spinning performance was poor, such as poor spinning. This can also be confirmed in Examples 7 and 8 that as the content of the PMMA additive gradually increases, the yarn-making property worsens.

In Comparative Example 2, the spinning speed was too high compared to the PMMA content, and the first partially stretched yarn was produced by spinning under spinning conditions that do not satisfy the conditions according to the following relational equation 1. The content of the PMMA additive is included in an appropriate range, It can be seen that the spinning speed is too high and the spinning property is poor.

Experimental Example 2: Measurement of physical properties of interlaced composite yarns of Examples and Comparative Examples

Physical properties such as the number of yarns manufactured according to Examples 1 to 8 and Comparative Examples 1 to 2, a change in RES length, and a change in LEE length were measured. The measurement results are shown in Table 2 below.

Interlaced composite yarn properties division Dagger
(%) RES'
First length RES'
Later length RES'
value LEE'
First length LEE'
Later length LEE'
value Example 1 6.78 50.5 48.3 4.36 51.1 49.1 3.91 Example 2 7.73 50.9 48.8 4.13 51.3 49.2 4.09 Example 3 7.53 50.5 48 4.95 51.3 49 4.48 Example 4 7.83 50.3 47 6.56 51 48.9 4.12 Example 5 7.45 50.6 47.8 5.53 51.2 49 4.30 Example 6 6.87 51.1 47.8 6.46 51 49.1 3.73 Example 7 7.98 50.5 41 18.81 51.2 49 4.30 Example 8 8.03 51 44.9 11.96 51 48.7 4.51 Comparative Example 1 6.78 50.5 40.2 20.40 51.1 47.9 6.26 Comparative Example 2 8.2 50.1 40.1 19.96 51.2 49 4.30

Referring to Table 2, it was confirmed that the PMMA content was the best at 5%.

10: first partial draw
20: Completely drawn yarn or second partial drawn yarn
30: interlaced composite yarn
110: first supply roller
120: second supply roller
200: interlacing device
210: roller 3
220: roller 4

Claims (10)

(1) spinning a first partially oriented yarn (POY) composition comprising a polyethylene terephthalate (PET) resin and a polymethyl methacrylate (PMMA) additive to form a porous first partially drawn yarn;
(2) manufacturing an interlaced composite yarn by combining and interlacing the first partially drawn yarn with a porous second partially drawn yarn having a composition different from the first partially drawn yarn;
The step (1) is a method for producing an interlaced composite yarn, characterized in that spinning is performed by satisfying the conditions of the following relational formula 1:
[Relationship 1]

In the above relational formula 1, C represents the content of the PMMA additive in the first partially drawn yarn composition in units of weight %, and R represents the spinning speed of the first partially drawn yarn in the step (1) in mpm (meters). per minute). The method of claim 1,
In the step (1), the spinning speed is 3,000 to 6,000 mpm, characterized in that the interlaced composite yarn manufacturing method. The method of claim 1,
The PMMA additive is an interlaced composite yarn manufacturing method, characterized in that contained in an amount of 0.1 to 3 parts by weight based on 100 parts by weight of the PET main resin in the first partially drawn yarn composition. delete delete The method of claim 1,
1) the first partially drawn yarn and 2) the second partially drawn yarn is laminated and interlaced at a weight ratio of 4:6 to 5:5. 1) A porous first partially drawn yarn containing a PET main resin and a PMMA additive
2) It is intertwined and entangled with the second partial drawing of the porosity,
The second partial drawn yarn has a composition different from the first partial drawn yarn,
Interlaced composite yarn with an elongation of 140% or more. The method of claim 7,
The PMMA additive is interlaced composite yarn, characterized in that it is contained in an amount of 0.1 to 3 parts by weight based on 100 parts by weight of the PET main resin in the first partially drawn yarn. delete The method of claim 7,
The 1) first partially drawn yarn and 2) the second partially drawn yarn are interlaced composite yarns, characterized in that they are bonded and entangled at a weight ratio of 4:6 to 5:5.

Images