KR20200080723A - Polypropylene filament elastic yarns, fabric thereof and manufacture method - Google Patents

Abstract

The present invention relates to a polypropylene filament elastic yarn. According to the present invention, the polypropylene filament elastic yarn is obtained by: melting and extruding a propylene-ethylene copolymer which includes 92 to 82 wt% of a propylene component, 8 to 18 wt% of an ethylene component, and 60 to 10 wt% of propylene; and spinning the product through a nozzle, so that the polypropylene filament elastic yarn including a plurality of strands of filaments is manufactured. Accordingly, since the polypropylene filament elastic yarn has a thickness of 100 to 1,500 denier and has an elongation elasticity coefficient of 99 to 70% at an elongation of 5 to 60%, excellent price competitiveness is provided at a half price of an existing polyurethane elastic yarn. The polypropylene filament elastic yarn is implemented into a filament yarn type with good texture, flexibility, and woven properties instead of a mono yarn type, and moreover, a polypropylene yarn material with better material characteristics compared to that of other fibers is used, thereby providing an advantage of realizing the polypropylene filament elastic yarn with a better elongation elasticity coefficient than that of an existing polypropylene filament yarn.

Description

Polypropylene filament elastic yarn and a fabric fabric using the same and a manufacturing method therefor{POLYPROPYLENE FILAMENT ELASTIC YARNS, FABRIC THEREOF AND MANUFACTURE METHOD}

The present invention relates to an elastic yarn, and more particularly, to a polypropylene filament yarn having improved elasticity and excellent elastic recovery with respect to its elongation, and to a fiber fabric and a manufacturing method using the same.

These days, elastic fibers have been widely used for use in stretch fabric materials such as legwear, innerwear, and sportswear or industrial materials because of their excellent elastic properties.

One example of such elastic fibers is polyurethane elastic yarn. Polyurethane elastic yarns are required to have high strength, high recovery, high chemical resistance, high heat resistance, and color fastness. In particular, chemical resistance is strongly demanded in recent years when it is used in a mixed fabric in combination with polyester yarns, and there is a demand for chemical resistance that can withstand the weight reduction and erosion processing of polyester.

For the purpose of imparting such chemical resistance, there is a technique of spinning polyvinylidene fluoride in a polyurethane spinning solution as an example technique, but in the case of polyurethane elastic yarn containing polyvinylidene fluoride, there is not enough recovery or heat resistance. In particular, for the use of mixed fabrics with polyester yarns that require weight reduction or blasting, the chemical resistance is still unsatisfactory, and its use is still unsatisfactory.

Moreover, the polyurethane elastic yarn, which is an example of such an elastic yarn, has a disadvantage in that its price competitiveness is poor due to its high price compared to other fiber yarns.

In addition, various types of elastic yarns, including polyurethane elastic yarns, are mostly manufactured in the form of mono yarns due to manufacturing difficulties. However, when the elastic yarn in the form of a mono yarn is woven into a fabric by using alone or mixed, there is a disadvantage that the touch feeling or weavability of the fabric is poor.

Therefore, if polyurethane has much better price competitiveness than polyurethane elastic yarn and is made of filament yarn rather than mono yarn type, it uses polypropylene yarn material which has superior material properties compared to other fibers. If the filament elastic yarn can be realized, a great response can be obtained from the industry or related workers.

Patent Registration No. 10-1440650 "Polyurethane elastic yarn and manufacturing method thereof"

Accordingly, an object of the present invention is to provide a polypropylene filament elastic yarn having improved material properties and a polypropylene filament elastic yarn having improved elasticity with respect to elongation, and a fabric fabric using the same and a method for manufacturing the same.

The present invention according to the above object, in the polypropylene filament elastic yarn, 40 to 90% by weight of propylene-ethylene copolymer and 60 to 10% by weight of propylene-ethylene copolymer having 92 to 82% by weight of propylene component and 8 to 18% by weight of ethylene component After melt extrusion, the nozzle is spun to prepare a polypropylene filament elastic yarn having multiple strands of filaments, wherein the polypropylene filament elastic yarn has a thickness of 100 to 1500 denier and an elongation elastic modulus of 99 to 70% when stretched from 5% to 60%. It is a polypropylene filament elastic yarn characterized in that the configuration.

The propylene-ethylene copolymer is characterized by consisting of 85% by weight of propylene component and 15% by weight of ethylene component,

In addition, the polypropylene filament elastic yarn of the present invention is characterized by consisting of 30 to 100 strands of filaments,

In addition, the polypropylene filament elastic yarn of the present invention is characterized by having a specific strength of 2-3 (gf/denier).

Moreover, in the present invention, the polypropylene filament elastic yarn is further provided with 3 to 8% by weight of pigment compared to 100% by weight of the total amount of the propylene-ethylene copolymer and polypropylene, so that the polypropylene filament elastic yarn has a color.

In addition, as another aspect of the present invention, by using the polypropylene filament elastic yarn as described above, it is woven into a single or mixed fabric to construct a fabric, ie, a woven fabric, a knitted fabric, a nonwoven fabric, etc. do.

In another aspect of the present invention, in the method of manufacturing a polypropylene filament elastic yarn, 40 to 90% by weight of propylene-ethylene copolymer having 92 to 82% by weight of propylene component and 8 to 18% by weight of ethylene component is polypropylene 60 It is injected into the melt extruder together with ~10% by weight, and melt-extruded to a temperature of 230~260℃, but after lowering it to 190~210℃ in the rear dice part of the melt extruder, it is spun into multiple filaments through the spinning nozzles, and through the spinning nozzles. After cooling and blowing the multiple filaments that are spun at a cooling temperature of 10 to 20°C, oiling them, and then stretching over a number of differences, stretching at a ratio of 1.5 to 3:1 at a stretching temperature of 50 to 60°C, and interlacing to 100~. It has a 1500 denier thickness and is characterized by obtaining a polypropylene filament elastic yarn having an elongation modulus of 99 to 70% when stretching 5% to 60%.

At this time, the melt extruder is characterized in that 3 to 8% by weight of the pigment compared to the total weight of 100% by weight of propylene-ethylene copolymer and polypropylene in the form of a master batch.

Since the present invention is half the price of the existing polyurethane elastic yarn, it has much better price competitiveness and is implemented not in the form of a mono yarn, but in the form of a filament yarn having good touch, flexibility and weaving properties, but has excellent material properties compared to other fibers. The use of yarn material has the advantage of realizing a polypropylene filament elastic yarn having a much better elongation modulus than conventional polypropylene filament yarn.

1 is a photo illustrative view of a polypropylene filament elastic yarn according to an embodiment of the present invention,
Figure 2a is a photographic illustration of the state before stretching the polypropylene filament elastic yarn of the present invention,
Figure 2b is a photographic illustration of a state in which the polypropylene filament elastic yarn of the present invention is stretched,
Figure 3 is a schematic manufacturing process configuration of a polypropylene filament elastic yarn according to an embodiment of the present invention.

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

When applied to fibers, polypropylene (PP) is called the dream material because it is the lightest of all synthetic fibers, has no static electricity, is comfortable to wear, has low thermal conductivity, has excellent heat retention, and has optimal sweat and quick drying functions.

In the present invention, by implementing such a polypropylene filament yarn as an elastic yarn, while making the most of the advantages that can be obtained from the polypropylene yarn, while providing excellent elastic properties of the elastic yarn, use of elastic fabric materials such as legwear, innerwear, sportswear or industrial materials Make it widely available for use

Until now, the production of elastic polypropylene filament yarns has been quite difficult. The reason is that one strand of the filament is very thin due to the characteristics of the filament yarn, and if the soft component is included to make each filament elastic, the filament yarn is easily broken during melt spinning during manufacture.

However, in the present invention, it was realized as a polypropylene filament yarn having elasticity and a polypropylene filament yarn having overcome this difficulty.

In addition, while most of the existing elastic yarns are in the form of mono yarns, in the present invention, they are made of filament yarns having a smooth and smooth characteristic by being composed of continuous long filaments, and also the manufacturing cost of polypropylene filament elastic yarns is It is manufactured to be almost half the price of urethane elastic yarns, which also serves as an advantageous feature in the supply of elastic yarns.

1 is a photo illustrative view of a polypropylene filament elastic yarn according to an embodiment of the present invention.

The polypropylene filament elastic yarn of the present invention is composed of propylene-ethylene copolymer and polypropylene having 92 to 82% by weight of propylene component and 8 to 18% by weight of ethylene component, of which propylene-ethylene copolymer has a high secret It is a semi-crystaline polymer with a high amorphous region.

Copolymers are polymers made by linking two or more types of monomers with improved properties or better combined properties than homopolymers (polymers made with one type of monomer).

The propylene-ethylene copolymer, which is a component of the polypropylene filament elastic yarn of the present invention, isotactic crystallite finely dispersed in the ethylene-propylene region of the amorphous ethylene-propylene copolymer is connected It has a structure and, due to this structure, it has the properties of a thermoplastic elastomer.

Now the polypropylene filament elastic yarn of the present invention will be described in more detail.

The polypropylene filament elastic yarn of the present invention is composed of 40 to 90% by weight of propylene-ethylene copolymer and 60 to 10% by weight of polypropylene having 30 to 100% by weight of propylene-ethylene copolymer having 92 to 82% by weight of propylene component and 8 to 18% by weight of ethylene component, It is formed of filaments of strands and has a thickness of 100 to 1500 denier, preferably 200 to 600 denier.

The preferred propylene-ethylene copolymer is one that is composed of 85% by weight of the propylene component and 15% by weight of the ethylene component.

In the propylene-ethylene copolymer component of the polypropylene filament elastic yarn, if the ethylene is less than 8% by weight, there is little elasticity, and when it exceeds 18% by weight, it is required as a filament elastic yarn, such as being cut when it becomes a meaningful elongation as an elastic yarn. It does not have a significant elongation modulus. The ethylene component of 8 to 18% by weight, the greater the ethylene component in the range, the lower the density or strength and the better the flexibility.

The polypropylene filament elastic yarn of the present invention is composed of 40 to 90% by weight of propylene-ethylene copolymer and 60 to 10% by weight of polypropylene, if the propylene-ethylene copolymer component is less than 40% by weight and the polypropylene component is 60 When it exceeds the weight%, elasticity as an elastic yarn decreases, and if the propylene-ethylene copolymer component exceeds 90% by weight and the polypropylene component is less than 10% by weight, it is difficult to manufacture as a filament yarn because a large amount of cutting occurs during spinning during filament production. .

Moreover, the polypropylene filament elastic yarn of the present invention has a composition having an elongation modulus of 100 to 70% when elongating from 5% (1.5 times) to 60% (1.6 times). The elastic modulus (Tensile elasticity) is a numerical value indicating the degree of elastic recovery to the elongation of the fiber yarn, the unit is expressed in %.

The elongation modulus of the polypropylene filament elastic yarn of the present invention is 15 to 30% better than the elongation modulus at the same distance elongation, compared to a general polypropylene yarn. If the elastic modulus is high, the ability of the fiber to recover back to its original state is excellent, so the higher the elastic modulus is, the better the recovery rate is. In addition, the elongation modulus is better to maintain a high value even in the state where the elongation of the fiber yarns is maximized.

The polypropylene filament elastic yarn of the present invention can be extended up to 70% of the gripping distance (20 mm), which is an experimental standard, and the larger the elongation at the gripping distance, the lower the range of the elastic modulus in inverse proportion within 100 to 70%.

The elongation modulus of the polypropylene filament elastic yarn of the present invention is 20-30% higher than the elongation modulus of the general polypropylene yarn, and as another comparative example, the polyester yarn is excised when it is elongated by 30% or more of the gripping distance. It contrasts with the impossible.

In addition, the polypropylene filament elastic yarn of the present invention has a specific strength of 2 to 3 (gf/denier), and the specific strength of the polypropylene yarn in contrast is 3.5 to 4.0 (gf/denier). Further, the polypropylene filament elastic yarn of the present invention has a yarn tensile elongation of 50 to 60%, and a corresponding polypropylene yarn has an elongation of tensile strength of 64 to 73% and another contrasting polyester yarn (絲). ) Tensile elongation is 25-30%.

Here, the specific strength is a value for measuring the cutting strength of a single yarn using a constant speed tensile (CRE) tester, and the yarn tensile strength is a value for measuring the cutting elongation of a single yarn using a constant speed tensile (CRE) tester.

In addition, the polypropylene filament elastic yarn of the present invention is further provided with 3 to 8% by weight of a pigment compared to 100% by weight of the total amount of propylene-ethylene copolymer and polypropylene, so that the color of the elastic yarn, that is, the dyeability of the yarn.

Figure 2a is a photographic exemplification of the state before stretching the polypropylene filament elastic yarn of the present invention, Figure 2b is a photographic exemplification of the state in which the polypropylene filament elastic yarn of the present invention is stretched.

As shown in FIG. 2A, the polypropylene filament elastic yarn in the contracted state can be increased by 1.5 times (50%) as in FIG. 2B, and can be increased up to 1.7 times (70%).

As shown in Figures 2a and 2b, as a specific example of the polypropylene filament elastic yarn of the present invention, 50% by weight of propylene-ethylene copolymer and 50% by weight of polypropylene having 85% by weight of propylene component and 15% by weight of ethylene component Consists of a 200 to 300 denier thickness, and its elongation modulus is 80 to 83% at 30% elongation at each reference gripping distance, 75 to 78% at 40% elongation at the reference gripping distance, and 50% elongation at the reference gripping distance. It shows a high recovery rate of 70-75%. When measuring the elastic modulus, the tensile speed was 10% of the gripping distance.

3 is a schematic manufacturing process configuration of a polypropylene filament elastic yarn according to an embodiment of the present invention.

Referring to FIG. 3, a method of manufacturing a polypropylene filament elastic yarn according to an embodiment of the present invention will be described.

First, in the present invention, 50 to 90% by weight of a propylene-ethylene copolymer having 92 to 82% by weight of a propylene component and 8 to 18% by weight of an ethylene component is introduced into the melt extruder 10 together with 50 to 10% by weight of polypropylene, and 230 Melt extruded to a temperature of ~260°C, but lowered to a temperature of 190~210°C in the rear dice part 14 of the melt extruder 10 to spin and drop a plurality of filaments 30 through spinning nozzles.

As shown in FIG. 4, the usable temperatures of the primary, secondary, and tertiary furnace parts of the melt extruder 10 are maintained to gradually increase to 230°C, 240°C, and 260°C, and the outlet part 12 with a gear pump Is lowered to 250° C. and the die section 14 having spinning nozzles maintains a temperature of 190 to 210° C. (preferably 200° C.), which is relatively lower than the heating temperature of 220° C. at the time of manufacturing the existing polyfilament.

This is because the spinning filament exhibits a sticky property due to the ethylene component constituting a part of the composition, so if the heating temperature of the dice part 14 exceeds 210°C, the less-cool sticky filaments emitted from the spinning nozzle are guided. This is because it can be easily broken while rubbing in a rotating or non-rotating friction section after the same spinning, and the present inventors have confirmed that the cutting temperature is minimized or prevented by relatively lowering the heating temperature of the dice part 14 through numerous experiments.

In addition, the melt extruder 10 is propylene-ethylene copolymer and polypropylene 100 to 100% by weight of the total compared to the pigment 3-8% by weight in the form of a master batch to further complete the production of propylene filament elastic yarn 32 to be implemented to have a color It should be noted that it may.

The plurality of filaments 30 radiated through the spinning nozzles of the dice part 14 are cooled by blowing to a cooling temperature of 10 to 20°C by the cooling blower 16 while falling, and then oiling is performed by the oiling part 10 . The oil ring part 10 gives a non-stretching effect to the surface of the unstretched yarn by uniformly giving a wetting effect to achieve proper molecular orientation, thereby providing smoothness, focusing property and antistatic property to the unstretched yarn, thereby improving the stretching workability.

After the oil ring is made, the filament yarn 30 is stretched over multiple times in the stretching portion 20, but is stretched at a stretching ratio of 1.5 to 3:1 at a stretching temperature of 50 to 60°C. This is compared to the existing polypropylene stretching ratio of 3 to 5: 1 and provides a lower stretching ratio, thereby minimizing the phenomenon that the filament yarns during stretching adhere to the stretching roller.

More specifically, the stretching unit 20 is composed of the first to third stretching rollers 20a, 20b, and 20c, so that the first to third stretching rollers 20a, 20b, and 20c are used by the stretching unit 20. The stretching is performed over a period of time, but the primary stretching between the first stretching roller 20a and the second stretching roller 20b, which are Godet rollers, is stretched at a stretching ratio of 1.5:1, and Godetler (godet The second stretching between the second stretching roller 20b, which is a roller) and the third stretching roller 20c, is stretched at a stretching ratio of 2-3.

In this way, the filament 30 stretched by the stretching unit 20 is interlaced by an interlacer 21 using compressed air, so that the filaments are bound by entanglement between the filaments (focusing). The enhanced polypropylene filament elastic yarn 32 is completed, and the thus obtained polypropylene filament elastic yarn 32 is wound around the winder 22 to become a final yarn product.

In Fig. 4, reference numerals 24a, 24b, 24c, 24d, 24e, 24f, 24g are guide rollers.

The polypropylene filament elastic yarn 32 of the present invention obtained through the manufacturing process as described above is 40 to 90% by weight of propylene-ethylene copolymer and 92 to 82% by weight of propylene-ethylene copolymer having 92 to 82% by weight of propylene component and 8 to 18% by weight of ethylene component. It is composed of ~10% by weight, is formed of 30~100 strands of filaments, has a thickness of 100~1500 denier, preferably 200~600 denier, and has an elongation elastic modulus of 99~70% at 5% to 60% elongation. Make up.

It should be understood that the polypropylene filament elastic yarn 32 of the present invention as described above may be used alone or mixed with other fiber yarns to be woven (knitted, woven, non-woven, etc.) to become a fiber fabric. It may be in the form of a woven fabric, a knitted fabric, or a nonwoven fabric.

In the above description of the present invention, specific embodiments have been described, but various modifications can be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be determined by the described embodiments, but should be defined by the claims and equivalents to the claims.

(10)-- Melt extruder (14)-- Die section
(16)-- Cooling blower (18)-- Oil ring
(20)-- Stretch (22)-- Winder
(30)-- Filament (32)-- Propylene filament elastic yarn

Claims (4)

In the polypropylene filament elastic yarn,
Polypropylene with multiple strands of filaments by melt-extrusion of 40 to 90% by weight of propylene-ethylene copolymer and 60 to 10% by weight of polypropylene having 92 to 82% by weight of propylene component and 8 to 18% by weight of ethylene component Equipped with a filament elastic yarn, the polypropylene filament elastic yarn has a thickness of 100 to 1500 denier and an elongation modulus of 99 to 70% at 5% to 60% elongation, and 30 to 100 strands of filament and 2 to 3 (gf/denier) Polypropylene filament elastic yarn characterized in that it has a specific strength.
The polypropylene filament elastic yarn according to claim 1, wherein the polypropylene filament elastic yarn further comprises 3 to 8% by weight of pigment compared to 100% by weight of the total of propylene-ethylene copolymer and polypropylene.
Fiber fabric using a polypropylene elastic yarn, characterized in that it is produced by weaving alone or in combination using the polypropylene elastic yarn of any one of claims 1 or 2. In the method of manufacturing a polypropylene filament elastic yarn,
40 to 90% by weight of the propylene-ethylene copolymer having 92 to 82% by weight of the propylene component and 8 to 18% by weight of the ethylene component is added to the melt extruder together with 60 to 10% by weight of the polypropylene, but the propylene-ethylene copolymer and polypropylene 3-8% by weight of pigment compared to 100% by weight of the total is added in the form of a master batch to melt-extrude at a temperature of 230~260°C, but lower it to 190~210°C in the rear die of the melt extruder, and then multiple filaments through spinning nozzles Radiate into
After cooling and blowing the multiple filaments that are spun through the spinning nozzles at a cooling temperature of 10 to 20°C, oiling them, and then stretching them over a number of differences, stretching at a ratio of 1.5 to 3:1 at a stretching temperature of 50 to 60°C and inter. A method of manufacturing a polypropylene filament elastic yarn characterized by obtaining polypropylene filament elastic yarn having 100 to 1500 denier thickness by lacing and having an elongation modulus of 99 to 70% when stretching 5% to 60%.

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