KR20010014677A - Filament having retroreflectivity, original thread manufactured using the same, and manufacturing method of filament having retroreflectivity - Google Patents

Abstract

PURPOSE: Provided is a recurrent reflection filament, which ensures flexibility of yarn required in lacing, sewing, fabricating and knitting processes and displays elegant and various colors. Also, a recurrent reflection yarn is provided which is manufactured by using the same. CONSTITUTION: A recurrent reflection filament is manufactured by conjugated spinning a mixture of a recurrent reflection material and a first polymer, and a second polymer in a weight ratio of 5-95:95-5. The filament comprises a recurrent reflection material such as glass beads. The first and second polymer materials are at least one selected from a group consisting of nylon, polyester and polypropylene. The filament obtained from spinning process has a core layer made of the second polymer and an outer layer made of the mixture. The filament is added with pigment or reflection efficiency increasing agents.

Description

Filament having retroreflectivity, original thread manufactured using the same, and manufacturing method of filament having retroreflectivity

The present invention relates to yarns, and more particularly to yarns having a retroreflective function.

In order to manufacture a yarn having a retroreflective function, a method of joining or covering a high strength yarn for supplementing strength with a functional yarn slitting a film having a retroreflective function to a predetermined width has been used. Here, the film having the retroreflective function was manufactured by applying glass oxide (glass bead) 10 coated with aluminum oxide to the polymer film, the glass beads 10 coated with aluminum oxide is half of the surface of the transparent glass beads Was prepared by coating with aluminum oxide (see FIG. 1).

However, this method is embroidered, sewn, weaved, knitted, etc. due to the problem of residual torque of the yarn, deterioration of the function of the functional yarn due to the covering, deterioration of productivity due to the multi-step process, and structural limitations in which the glass beads 10 protrude outwards. The glass beads 10 were dropped during the yarn processing process or during the use of the product, and thus the reflection brightness was lowered, and it was difficult to express various colors, and thus, the glass beads 10 were not suitable for use as yarns for embroidery, sewing, weaving, and knitting.

In addition, the biggest problem is that the lowest limit of fineness of slitting functional yarns is 350 to 500 denier per filament (denier = g / 9,000 m) when converted into polyester of the same volume, and the strength at this time is very high. Due to its weakness, it is necessary to combine or cover reinforcing yarns to compensate for the strength of this functional yarn. There was a problem that the product quality is lowered.

An object of the present invention is to provide a retroreflective yarn having a high durability retroreflective function, excellent in processability in yarn production and use, and excellent in quality and capable of expressing various colors.

1 shows aluminum oxide coated glass beads

Figure 2 is a cross-sectional view schematically showing a state before the weight loss treatment in one example of a two-layer structure filament according to the present invention

3 is a cross-sectional view schematically showing a state after the weight loss treatment of the filament of FIG.

4 is a cross-sectional view schematically showing a state before a weight loss treatment in an example of a two-region structure filament according to the present invention.

5 is a cross-sectional view schematically showing a state before the weight loss treatment in one example of a three-layered filament according to the present invention.

6 is a cross-sectional view schematically showing a state after the weight loss treatment of the filament of FIG.

7 is a cross-sectional view schematically showing a state before a weight loss treatment in one example of a three-zone structure filament according to the present invention.

※ Explanation of code for main part of drawing

A1: deep A2: first region

B1: middle layer B2: middle region

C1, D1: outer layer C2, D2: second region

1: aluminum oxide coated part

10: Glass Beads with Recursive Reflection

11: transparent glass beads 20: first polymer material

The retroreflective filament according to the present invention comprises a mixture of a retroreflective material and a first polymer material capable of radiation; And a composite spinning of the second polymer material capable of spinning.

The retroreflective filaments according to the present invention may also comprise a first mixture of transparent beads and a first polymer material capable of spinning; A second mixture of reflecting agent and third polymer material capable of spinning; And a composite spinning of the second polymer material capable of spinning.

The retroreflective yarn according to the present invention is prepared using the retroreflective filament.

The method for producing a retroreflective filament according to the present invention comprises a mixture of a retroreflective material and a first polymer material capable of radiation; And composite spinning the second polymer material capable of spinning.

The method for producing the retroreflective filament according to the present invention also comprises a first mixture of transparent beads and a first polymer material capable of spinning; A second mixture of reflecting agent and third polymer material capable of spinning; And composite spinning the second polymer material capable of spinning.

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

The retroreflective filament according to the present invention comprises a mixture (C1, C2) of the retroreflective material 10 and the first polymer material 20 capable of radiation; And it is produced by complex spinning the second polymer material (A1, A2) capable of spinning.

The weight ratio of the retroreflective material 10 and the first polymer material 20 is preferably 5 to 95: 95 to 5.

As the retroreflective material 10, glass beads, mica, etc. having a retroreflective function may be used. Here, as the glass beads having a retroreflective function, as shown in FIG. 1, an aluminum oxide coated glass bead 10 manufactured by coating half (1) of the surface of the transparent glass beads with aluminum oxide is used, and the diameter thereof is 0.3 to 0.3. 1,500 microns is preferred. Such glass beads 10 are known to those skilled in the art to purchase and use commercially available products.

The volume ratio of the mixture (C1, C2) and the second polymer material (A1, A2) is preferably from 5 to 95: 95 to 5.

Preferably, the first polymer material 20 and the second polymer material A1 are at least one selected from the group consisting of nylon, polyester, and polypropylene, respectively.

In the filament obtained by the composite spinning, it is preferable that the deep layer A1 is made of the second polymer material and the outer layer C1 is made of the mixture in cross-sectional structure. 2 layer structure).

In the filament obtained by the composite spinning, it is preferable that the first region A2 is made of the second polymer material and the second region C2 is made of the mixture in cross-sectional structure (see FIG. 4, hereinafter). This structure is referred to as 'two-zone structure' for convenience).

As shown in FIGS. 2 and 4, the polymer layer 20 including the retroreflective material 10 is concentrated in the outer layer C1 and the second region C2 to enhance the retroreflective function. Only the polymer material is concentrated in the deep layer A1 and the first region A2 so as to enhance the physical properties of the obtained yarns, thereby making it possible to simultaneously enhance the reflex reflection function and the physical properties of the yarns.

The polymer material 20 constituting the outer layer C1 and the second region C2 is preferably made of the same material as the polymer material constituting the deep layer A1 and the first region A2. Then, the combination of the deep layer A1 and the outer layer C1, the first region A2, and the second region C2 becomes tight, so that the physical properties represented by the deep layer A1 and the first region A2 are the outer layer C1. And the second region C2, and at the same time maintain the retroreflective characteristics.

The mixture constituting the outer layer C1 and the second region C2 may be formed into pellets by a conventional compounding method.

Reflectance enhancers may be added to the mixtures C1 and C2 to increase the reflection brightness. The weight ratio of the mixture (C1, C2) and the reflectance enhancer is preferably 85 to 99.9: 15 to 0.1. Aluminum oxide is preferred as the reflectance enhancer. The aluminum oxide is known to those skilled in the art to purchase and use a commercially available product.

The composite spinning can be achieved by spinning through spinneret, and the composite spinning to simultaneously spin two or more raw materials having different properties is a technique known to those skilled in the art.

Spinnerets used for complex spinning are also well known to those skilled in the art that can be purchased and used commercially.

The mixture (C1, C2) and the second polymer material (A1, A2) are separately melted and extruded by a conventional method in an extruder capable of temperature control separately. This is mounted, and the extrusion liquid is spun through this mold.

The filament having the cross-sectional shape of FIG. 2 is simultaneously injected and discharged into the mixture C1 and the second polymer material A1 into each of several holes constituting the spinneret designed to obtain such a cross-sectional shape. Obtained.

Here, a pigment may be added to the mixture (C1) for coloring of the retroreflective filament. In this case, the volume ratio of the mixture (C1) and the pigment is preferably 90 to 99:10 to 1.

The filament having the cross-sectional shape of FIG. 4 is obtained by simultaneously injecting and discharging the mixture C2 and the second polymer material A2 into each of several to several tens of holes constituting a spinneret designed to obtain such a cross-sectional shape. do.

Here, a pigment may be added to the mixture (C2) and the second polymer material (A2) for coloring the retroreflective filament. In this case, the volume ratio of the mixture (C2) and the pigment, the volume ratio of the second polymer material (A2) and the pigment are preferably 90 to 99:10 to 1.

Only one strand of the retroreflective filament thus obtained can be used to make a yarn (hereinafter, referred to as 'monospinning') or a plurality of strands can be used to make a yarn (hereinafter referred to as Called 'multi-radiation'). The yarn thus produced is 10 to 5,000 denier when the fineness is converted into polyester of the same volume, and the fineness is 1 to 5,000 denier per filament.

In addition, a plurality of filaments obtained by the multi-spinning method may be collected to cut a stretched yarn to make staples (short fibers), and then to prepare a spun yarn (hereinafter, this manufacturing method is referred to as a 'spun yarn manufacturing method'). At this time, 120 to 20 spun yarn is made from staples in which the drawn yarn is cut into 10 to 100 mm, and the fineness of each staple is 1 to 50 denier.

The filaments having the cross-sectional shape of FIGS. 2 and 4 are in a single strand state in the mono-spinning method, in a stretched yarn state in the multi-spinning method, and hank rewinding the spun yarn in the spinning yarn manufacturing method. In the) state, weight loss treatment is preferably performed using a solution capable of dissolving the polymer material on the surface of the yarn.

This weight loss treatment removes the polymer material on the surface of the filament surrounding the retroreflective material 10, thereby increasing the luminance of the outer layer C1 and the second region C2 and increasing the flexibility of the obtained retroreflective yarn. Can be. The solution is preferably a sodium hydroxide solution or a formic acid solution.

When the filament of FIG. 2 is reduced in weight, the filament of FIG.

The loss-treated monofilament, the drawn yarn in which the plurality of filaments are collected, or the spun yarn is twisted or combined depending on the end use to obtain a retroreflective yarn.

The retroreflective filaments according to the present invention also comprise a first mixture (D1, D2) of transparent beads (11) and a first polymer material (20) capable of spinning; A second mixture (B1, B2) of a reflecting agent and a third polymer material capable of spinning; And it is produced by complex spinning the second polymer material (A1, A2) capable of spinning.

The bead 11 is preferably a glass bead.

The weight ratio of the bead 11 and the first polymer material 20 is preferably 5 to 95: 95 to 5.

The glass beads 11 preferably have a diameter of 0.3 to 1,500 microns. Such glass beads 11 are well known to those skilled in the art to purchase and use commercially available products, and are inexpensive compared to the aluminum oxide coated glass beads 10 described above.

The volume ratio of the first mixture (D1, D2), the second mixture (B1, B2) and the second polymer material (A1, A2) is preferably 5 to 35: 1 to 9:94 to 56.

Preferably, the first, second and third polymer materials are at least one selected from the group consisting of nylon, polyester, and polypropylene, respectively.

The volume ratio of the reflector and the third polymer material is preferably 5 to 15:95 to 85. As said reflecting agent, the aluminum oxide mentioned above is preferable.

The complex spinning is a technique known to those skilled in the art as described above, and the spinneret used for the complex spinning is also known to those skilled in the art that can be purchased and used commercially.

The first mixture (D1, D2), the second mixture (B1, B2) and the second polymer material (A1, A2) are separately melted and extruded in a conventional manner in an extruder capable of temperature control separately. The spinneret is mounted at the outlet to be extruded so that the extrusion liquid is spun through the spinneret.

The filament having the cross-sectional shape of FIG. 5 has the first mixture (D1), the second mixture (B1) and the second polymer in each of several to several tens of holes constituting the spinneret designed to obtain such a cross-sectional shape. It is obtained by simultaneously injecting and discharging the substance A1.

Here, a pigment may be added to the first mixture D1 for coloring the retroreflective filament. In this case, the volume ratio of the first mixture (D1) and the pigment is preferably 90 to 99:10 to 1.

The filament having the cross-sectional shape of FIG. 7 includes the first mixture D2, the second mixture B2, and the second polymer material in each of the holes forming the spinneret designed to obtain the cross-sectional shape. It is obtained by simultaneously injecting and discharging A2).

Here, a pigment may be added to the first mixture (D2) and the second polymer material (A2) for coloring of the retroreflective filament. In this case, the volume ratio of the first mixture (D2) and the pigment, the volume ratio of the second polymer material (A2) and the pigment is preferably 90 to 99:10 to 1.

The filament obtained by the composite spinning has a cross-sectional structure in which the deep layer A1 is made of the second polymer material, the middle layer B1 is made of the second mixture, and the outer layer D1 is made of the first mixture. It is preferred (see FIG. 5, hereinafter such a structure is referred to as a 'three-layer structure' for convenience).

The filament obtained by the composite spinning also has a cross-sectional structure in which the first region A2 is made of the second polymer material, the intermediate layer B2 is made of the second mixture, and the second region D2 is It is preferable that it consists of a 1st mixture (refer FIG. 7 and this structure is called a "three area structure" for convenience hereafter).

The above-described filaments of the two-layer and two-zone structure (see FIGS. 2 to 4) show that the aluminum oxide coated glass beads 10 exhibit a retroreflective function, whereas the filaments of the three-layer and three-zone structures (FIGS. 5 to 7). The reflective layer (intermediate layers B1 and B2) is formed between the deep layer A1 and the outer layer C1 and also between the first region A2 and the second region D2, which represents a retroreflective function.

The process after the composite spinning is the same as in the case of the filaments of the two-layer structure and the two region structure described above, and the filaments obtained and the fineness of the yarns produced using the same are also the same.

The weight loss treatment applied in the two-layer and two-zone structure described above is also applied to the three-layer and three-zone structure as it is, and the filament structure after the weight loss treatment applied to the three-layer structure is shown in FIG. 6.

Hereinafter, preferred embodiments of the present invention will be described. However, the scope of the present invention is not limited thereto.

Example 1 (Multi-Spinning Applied to Two-Layered Filaments)

In a compounding machine equipped with twin screws, transparent polyethylene terephthalate with an intrinsic viscosity of 0.8 and a 1 micron diameter glass bead with recursive reflection are uniformly mixed in a weight ratio of 60:40. After melting, a lace is made and cooled in a water bath, and pellets having a diameter of 2 mm and a length of 3 mm are made into a raw material mixture.

The raw material mixture is spun with a mixture of black pigment added and a sufficiently dried transparent polyethylene terephthalate having an intrinsic viscosity of 0.6. At this time, the spinning temperature is 290 ° C. Here, the volume ratio of the raw material mixture, the black pigment and the polyethylene terephthalate is 25: 4: 71.

The reason why the inherent viscosity of the polyethylene terephthalate entering the deep layer (A1) and the outer layer (C1) is different is that the intrinsic viscosity of the deep layer (A1) and the outer layer (C1) must be the same. This is because the added viscosity decreases.

The raw material melted and extruded in each extruder is passed through a spinneret where the cross-sectional shape of FIG. 2 can be obtained, and the air adjusted to have a temperature of 18 ° C. and a relative humidity of 65% at 0.5 m / sec. Blow at speed to cool. At this time, the cooling section is 2m.

The cooled filament is wound in an emulsion according to a conventional method and wound up 32 filaments at a speed of 1,200 m / min. The unstretched yarn obtained at this time has a fineness of 840 denier / 32 filaments.

This undrawn yarn is drawn at a draw ratio of 3 in a conventional two-stage drawing machine, and the drawing conditions at this time are the normal polyester drawing conditions and the speed is 800 m / min.

The drawn yarn is 280 denier / 32 filament of fineness.

The resultant stretched yarn is rewinded in a hank state, and then subjected to weight loss treatment at 80 ° C. with 15% sodium hydroxide solution for 30 minutes.

The retroreflective yarn obtained by this weight loss treatment finally has a fineness of 250 denier / 32 filaments, has a strength of 3.5 g / denier and 20% elongation, and can be embroidered at a speed of 750 DS / min in a general embroidery machine. According to EN 471 standard, it has 400cd / Lux.m ² luminance based on incident angle of 5 'and observation angle of 0.2'.

Example 2 (Multi-Spinning Applied to Two-zone Structural Filament)

In a compounding machine equipped with a twin screw as in Example 1, uniformly mixed transparent nylon 6 having a relative viscosity of 2.7 and glass beads 10 having a diameter of 3 microns having a retroreflective function in a weight ratio of 50:50, After melting, a lace is made and cooled in a water bath, and pellets having a diameter of 2 mm and a length of 3 mm are prepared as a raw material mixture.

The composite spinning was carried out using 30% by volume of the raw material mixture and 70% by volume of transparent nylon 6 having a sufficiently dried relative viscosity of 2.4. At this time, the spinning temperature is 255 ° C.

The raw material melted and extruded in each extruder is passed through a spinneret where the cross section of FIG. 4 can be obtained, and the air adjusted to have a temperature of 18 ° C. and a relative humidity of 65% at a rate of 0.4 m / sec. Blow to cool. At this time, the cooling section is 2m.

After cooling the filament according to a conventional method, 32 filaments are wound at a speed of 900 m / min to obtain an undrawn yarn, the fineness of which is 750 denier / 32 filament.

This undrawn yarn is drawn at a draw ratio 3 in a normal two-stage drawing machine, and the drawing conditions at this time are the usual nylon 6 drawing conditions and the speed is 600 m / min.

The drawn yarn is 250 denier / 32 filaments of fineness.

The resultant stretched yarn is rewinded to a hank state and then subjected to weight loss treatment for 30 minutes in a 5% formic acid solution at room temperature. After the loss-treated stretched yarn is twisted at 200T / M (twist per meter), two strands are joined to finally form a yarn having a fineness of 470 denier / 64filament.

This yarn has a strength of 3.2g / denier and 23% elongation, and has a luminance of 500cd / Lux.m ² based on the angle of incidence 5 ′ and observation angle 0.2 ′ according to EN 471 standards. It is possible and the quality is excellent.

Example 3 (Applied to the yarn manufacturing method for the two-layer filament)

In a compounding machine equipped with a twin screw as in Example 1, a transparent polyethylene terephthalate having an intrinsic viscosity of 0.7 and glass beads having a diameter of 10 microns having a retroreflective function were uniformly mixed and melted in a weight ratio of 70:30. After the laces are made and cooled in a water bath, pellets 2 mm in diameter and 3 mm in length are made into a raw material mixture.

The composite spinning was carried out using 35% by volume of this raw material mixture and 65% by volume of transparent polyethylene terephthalate having a sufficiently dried intrinsic viscosity of 0.55. At this time, the spinning temperature is 290 ° C.

The raw material melted and extruded in each extruder is passed through a spinneret where the cross section of FIG. 2 can be obtained, and the air adjusted to have a temperature of 18 ° C. and a relative humidity of 65% at a rate of 0.7 m / sec. Blow to cool. The cooling section at this time is 3 m.

The cooled filaments are emulsion-treated according to a conventional method and then wound 54 filaments at a rate of 1,000 m / min to obtain undrawn yarn, the fineness of which is 864 denier / 54 filament.

This undrawn yarn is drawn at a draw ratio of 3.2 under normal ordinary polyester drawing conditions, and the speed is 800 m / min.

The obtained stretched yarn is uniformly cut to 49 mm in length, subjected to a conventional spinning process, and then twisted to 800 T / M, and then heat-set in a 100 ° C. water vapor atmosphere for 30 minutes to obtain a spun yarn. The resulting yarn has a fineness of 350 denier.

After rewinding the yarn in a hank state, it is weight-reduced with 15% sodium hydroxide solution at 80 ° C. for 30 minutes. Two strands of the weight loss treated yarn were twisted with S and Z at 250 T / M, respectively, and then finally joined to prepare a yarn.

This yarn has a fineness of 660 denier, strength of 4.2g / denier and elongation of 18%, and has a luminance of 470cd / Lux.m ² based on the angle of incidence 5 ′ and observation angle 0.2 ′ according to EN 471. It is possible to sew at speed, and the quality is excellent.

Example 4 Application of Monospinning to Two-Layered Filaments

In a compounding machine equipped with a twin screw as in Example 1, a transparent polyethylene terephthalate having an intrinsic viscosity of 0.7 and glass beads having a diameter of 50 microns having a retroreflective function were uniformly mixed and melted in a weight ratio of 60:40. After the laces are made and cooled in a water bath, pellets 2 mm in diameter and 3 mm in length are made into a raw material mixture.

To 35% by volume of this raw material mixture, 65 vol% of transparent polyethylene terephthalate having an intrinsic viscosity of 0.65 sufficiently dried was spun. At this time, the spinning temperature is 290 ° C.

The raw material melted and extruded in each extruder is passed through a spinneret where a cross-sectional shape of FIG. 2 can be obtained to make a lace, and then cooled by passing through a water bath. At this time, the cooling section is 1.5m.

The cooled filaments are wound at a speed of 100 m / min through stretching and heat treatment according to a conventional monofilament manufacturing method, and the thus obtained stretched yarn is a monofilament having a fineness of 500 deniers.

The resultant stretched yarn is rewound in a hank state and then treated at 80 ° C. for 30 minutes with 15% sodium hydroxide solution. The retroreflective yarn obtained by this weight loss treatment finally has a fineness of 450 denier, has a strength of 5.0 g / denier and 20% elongation, and is 800 cd / Lux based on an incident angle of 5 'and an observation angle of 0.2' according to EN 471 standards. It has a luminance of .m ² and is excellent in quality.

Example 5 (Multi-Spinning Applied to Three-Layered Filaments)

In a compounding machine equipped with a twin screw as in Example 1, a transparent polyethylene terephthalate having an intrinsic viscosity of 0.8 and a transparent glass bead having a diameter of 1 micron were uniformly mixed and melted at a weight ratio of 60: 40 to form a lace. After cooling in a water bath, pellets having a diameter of 2 mm and a length of 3 mm are made as a first mixture.

In a compounding machine equipped with a twin screw as in Example 1, a transparent polyethylene terephthalate having an intrinsic viscosity of 0.8 and aluminum oxide uniformly mixed and melted at a weight ratio of 50:50 was melted to form a lace, and then cooled in a water bath. Pellets 2 mm in diameter and 3 mm in length are made to form a second mixture.

The first mixture is spun with a mixture of black pigment added, a second mixture, and a transparent polyethylene terephthalate with a sufficiently dried intrinsic viscosity of 0.6. At this time, the spinning temperature is 290 ° C. Here, the volume ratio of the first mixture, the black pigment, the second mixture and the polyethylene terephthalate is 17: 3: 5: 75.

The raw material melted and extruded in each extruder is passed through a spinneret in which the cross-sectional shape of FIG. 5 can be obtained.

The process after this is the same as that of Example 1.

The retroreflective yarn obtained by the weight loss treatment finally has a fineness of 250 denier / 32 filament, has a strength of 3.5 g / denier and 20% elongation, and can embroider at a speed of 750 DS / min in a general embroidery machine. It has a luminance of 400 cd / Lux.m ² based on the incident angle of 5 'and the observation angle of 0.2' according to the 471 standard.

Example 6 (Multi-Spinning Applied to Three-zone Structural Filament)

In a compounding machine equipped with a twin screw as in Example 1, a transparent nylon 6 having a relatively dry viscosity of 2.7 and a transparent glass bead having a diameter of 3 microns are mixed and melted at a weight ratio of 50:50 to form a lace. After cooling to form a pellet of 2mm diameter and 3mm length to make the first mixture.

In a compounding machine equipped with a twin screw as in Example 1, transparent nylon 6 and aluminum oxide having a relative viscosity of 2.7 sufficiently mixed and melted in a weight ratio of 70:30 were uniformly mixed and melted to form a lace, and then cooled in a water bath, and then a diameter A pellet of 2 mm in length and 3 mm in length is made as a second mixture.

Composite spinning was carried out using 20% by volume of the first mixture, 10% by volume of the second mixture, and 70% by volume of transparent nylon 6 having a sufficiently dried relative viscosity of 2.4. At this time, the spinning temperature is 255 ° C.

The raw material melted and extruded in each extruder is passed through a spinneret in which the cross section of FIG. 7 can be obtained.

The process after this is the same as that of Example 2.

The retroreflective yarn finally obtained has a fineness of 470 denier / 64filament. This yarn has a strength of 3.2g / denier and 23% elongation, and has a luminance of 500cd / Lux.m ² based on the angle of incidence 5 ′ and observation angle 0.2 ′ according to EN 471 standards. It is possible and the quality is excellent.

Example 7 (Applied to the yarn manufacturing method for the filament of the three region structure)

In a compounding machine equipped with a twin screw as in Example 1, a transparent polyethylene terephthalate having an intrinsic viscosity of 0.7 and a transparent glass bead having a diameter of 10 microns were uniformly mixed and melted in a weight ratio of 70:30 to form a lace. After cooling in a water bath, pellets having a diameter of 2 mm and a length of 3 mm are made as a first mixture.

In a compounding machine equipped with a twin screw as in Example 1, the transparent polyethylene terephthalate and aluminum oxide having a sufficient inherent viscosity of 0.7 and aluminum oxide were uniformly mixed and melted in a weight ratio of 80:20 to form a lace, and then cooled in a water bath. Pellets 2 mm in diameter and 3 mm in length are made to form a second mixture.

The composite spinning was carried out using 25% by volume of the first mixture, 10% by volume of the second mixture and 65% by volume of transparent polyethylene terephthalate having a sufficiently dried intrinsic viscosity of 0.55. At this time, the spinning temperature is 290 ° C.

The raw material melted and extruded in each extruder is passed through a spinneret from which the cross section of FIG. 5 can be obtained.

The subsequent steps are the same as in Example 3.

Finally, the retroreflective yarn obtained had a fineness of 660 denier, a strength of 4.2 g / denier and an elongation of 18%, and a luminance of 470 cd / Lux.m ² based on an incident angle of 5 ′ and an observation angle of 0.2 ′ according to EN 471. It is possible to sew at the same speed as general sewing thread, and it is excellent in quality.

Example 8 (Mono-spinning applied to three layered filament)

In a compounding machine equipped with a twin screw as in Example 1, a transparent polyethylene terephthalate having an intrinsic viscosity of 0.7 and glass beads having a diameter of 50 microns having a retroreflective function were uniformly mixed and melted in a weight ratio of 60:40. After the laces are made and cooled in a water bath, pellets 2 mm in diameter and 3 mm in length are made into a first mixture.

In a compounding machine equipped with a twin screw as in Example 1, a transparent polyethylene terephthalate and aluminum oxide having a sufficient inherent viscosity of 0.7 and aluminum oxide were uniformly mixed and melted in a weight ratio of 90:10 to form a lace, and then cooled in a water bath. Pellets 2 mm in diameter and 3 mm in length are made to form a second mixture.

A composite spinning of 30% by volume of the first mixture, 5% by volume of the second mixture and 65% by volume of transparent polyethylene terephthalate having a sufficiently dried intrinsic viscosity of 0.65. At this time, the spinning temperature is 290 ° C.

The raw material melted and extruded in each extruder is passed through a spinneret in which the cross-sectional shape of FIG. 5 can be obtained.

The subsequent process is the same as that of Example 4.

The finally obtained retroreflective yarn has a fineness of 450 denier, has a strength of 5.0 g / denier and 20% elongation, and has a luminance of 800 cd / Lux.m ² based on an incident angle of 5 'and an observation angle of 0.2' according to EN 471. It has a good quality.

The retroreflective yarn according to the present invention can be used for sewing thread, sewing thread, embroidery thread, theodolite yarn, knitted yarn, etc., and specifically, clothing, shoes, tents, belts, socks, fashion items, wapens, waistbands It can be used for various strings and fancy goods.

In addition, it is easily recognized at night due to its excellent retroreflective function, which is useful as a protective safety product and can also be used as a high fashion product.

The retroreflective filament according to the present invention has a high durability retroreflective function, excellent in processability in the yarn processing process, it is possible to manufacture a retroreflective yarn capable of expressing a variety of colors with excellent quality.

Claims (27)

A mixture of a retroreflective material and a first polymer material capable of radiation; And A retroreflective filament produced by complex spinning of a second polymer material capable of spinning. The retroreflective filament of claim 1, wherein the weight ratio of the retroreflective material and the first polymer material is in the range of 5 to 95: 95 to 5. The retroreflective filament of claim 1, wherein the retroreflective material is glass beads having a retroreflective function. The retroreflective filament of claim 1, wherein the volume ratio of the mixture and the second polymer material is in the range of 5 to 95: 95 to 5. 2. The retroreflective filament of claim 1, wherein the first or second polymer material is at least one selected from the group consisting of nylon, polyester, and polypropylene. 2. The retroreflective filament of claim 1, wherein the filament obtained by the composite spinning has a deep cross-sectional structure of the second polymer material and an outer layer of the mixture. 7. The retroreflective filament of claim 6, wherein a pigment is added to the mixture. 2. The retroreflective filament of claim 1, wherein the filament obtained by the composite spinning has a cross-sectional structure in which a first region is made of the second polymer material and a second region is made of the mixture. 9. The retroreflective filament of claim 8, wherein a pigment is added to the mixture and the second polymeric material. 2. The retroreflective filament of claim 1, wherein a reflectance enhancer is added to the mixture. 11. The retroreflective filament of claim 10, wherein the reflectance enhancer is aluminum oxide. A first mixture of transparent beads and spinable first polymeric material; A second mixture of reflecting agent and third polymer material capable of spinning; And A retroreflective filament produced by complex spinning of a second polymer material capable of spinning. 13. The retroreflective filament of claim 12, wherein the bead is a glass bead. 13. The retroreflective filament of claim 12, wherein the weight ratio of the bead and the first polymer material is in the range of 5 to 95: 95 to 5. 13. The retroreflective filament of claim 12, wherein the volume ratio of the first mixture, the second mixture, and the second polymer material is in the range of 5 to 35: 1 to 9:94 to 56. 13. The retroreflective filament of claim 12, wherein the first, second or third polymeric material is at least one selected from the group consisting of nylon, polyester and polypropylene. 13. The retroreflective filament of claim 12, wherein the reflector is aluminum oxide. The filament obtained by the composite spinning is characterized in that the deep layer is made of the second polymer material, the middle layer is made of the second mixture, and the outer layer is made of the first mixture. Recursive reflective filament. 19. The retroreflective filament of claim 18, wherein a pigment is added to the first mixture. The filament of claim 12, wherein the filament obtained by the composite spinning has a cross-sectional structure in which a first region consists of the second polymer material, an intermediate region consists of the second mixture, and a second region consists of the first mixture. Retroreflective filament, characterized in that consisting of. 21. The retroreflective filament of claim 20, wherein a pigment is added to the first mixture and the second polymeric material. 14. The retroreflective filament of claim 3 or 13, wherein the diameter of the glass beads is 0.3-1,500 microns. A retroreflective yarn made using the filament of claim 1. 24. The retroreflective yarn of claim 23, wherein the filament is weight-reduced using a solution that can dissolve the polymeric material on its surface. 25. The retroreflective yarn of claim 24, wherein the solution is a sodium hydroxide solution or a formic acid solution. A mixture of a retroreflective material and a first polymer material capable of radiation; And a composite spinning of the second polymer material capable of spinning. A first mixture of transparent beads and spinable first polymeric material; A second mixture of reflecting agent and third polymer material capable of spinning; And a composite spinning of the second polymer material capable of spinning.