Reflective yarn preventing glass microsphere from falling off

Abstract

To provide a reflective yarn that prevents glass microspheres from falling off.SOLUTION: A reflective yarn is a laminate formed by laminating a substrate layer, a plurality of glass microspheres, and at least one adhesion layer. The plurality of glass microspheres are provided at least on one surface of the reflective yarn. A coating layer made of resin has light permeability, coats the reflective yarn, and covers the glass microspheres. The glass microspheres of the reflective yarn are protected by the coating layer so as not to fall off from the reflective yarn.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to a reflective thread, and more particularly to a reflective thread that can protect glass microspheres in the reflective thread and prevent the glass microspheres from falling off or dropping off. [Background technology]

[0002] In the prior art, reflective threads are produced by cutting a reflective film. Figure 1 shows a reflective film 10 with glass microspheres, which can be cut into multiple strands of reflective threads 20, as shown in Figure 2.

[0003] The surface of the substrate layer 12 of the reflective film 10 is bonded to the glass microspheres 16 via a bonding layer 14, and a reflective layer 18 made of metal such as aluminum or silver is plated on the bottom side of the glass microspheres 16, giving it a silver color. After light enters the glass microspheres 16, the reflective layer 18 reflects the light, causing it to be retroreflected from the incident angle.

[0004] The reflective film 10 can be cut into a reflective thread 20 as shown in Fig. 2, and the glass microspheres 16 and reflective layer 18 of the reflective thread 20 give the reflective thread a light-reflecting function. When the reflective thread 20 is woven into a fabric, the woven fabric has a reflective function. The reflective thread 20, which is made of the glass microspheres 16 and the silver or aluminum reflective layer 18, can reflect light with a high lumens.

[0005] However, conventional reflective yarns 20 that use glass microspheres to reflect light have problems during weaving. Because the glass microspheres 16 are exposed on the surface of the reflective yarn, they can fall off the reflective yarn and into the equipment during the weaving process, not only affecting the reflective performance of the reflective yarn but also damaging the knitting machine. This problem is particularly serious with circular knitting machines and warp knitting computer jacquards, where the glass microspheres 16 can fall into the knitting machine's needle hook, causing the knitting machine to stick and damage the knitting machine.

[0006] Furthermore, in addition to the problem of the glass microspheres 16 falling off, conventional reflective threads 20 also have the problem of so-called silver exposure (the silver is conspicuous) when using colored, high-brightness reflective threads. The reflective threads 20 are colored by providing two colored layers (not shown) on the top and bottom surfaces of the reflective film 10, respectively. More precisely, the colored layers are provided on the glass microspheres 16, so that the cut reflective threads 20 have color.

[0007] However, as shown in Fig. 2, the colored layer is located only where the glass microspheres 16 are present, and both side surfaces 22 of the reflective thread 20 do not have a colored layer because they are formed after cutting. Therefore, only the top and bottom surfaces of the reflective thread 20 in Fig. 2 are colored, and the reflective layer 18 is exposed on the side surfaces 22 of the reflective thread. Because the glass microspheres 16 are transparent, when light is scattered, in terms of visual effect, the entire side surface 22 of the reflective thread 20 appears silver, the color of the reflective layer 18, and the colors are different at different positions on the reflective thread, and both side surfaces 22 are different from the color of the top and bottom surfaces.

[0008] In the prior art, when trying to produce colored reflective yarn 20, it was necessary to produce a large amount of colored reflective film 10 and then cut it into colored reflective yarn, making it impossible to produce small amounts of colored reflective film. Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention aims to provide a reflective yarn having glass microspheres, which can be used to solve the defects of conventional reflective yarns, protect the glass microspheres in the reflective yarn, and prevent the glass microspheres from falling, thereby solving the difficulties currently encountered in the industry.

[0010] An object of the present invention is to provide a reflective yarn that can prevent glass microspheres from falling, which can solve the problem of color unevenness on different surfaces of conventional reflective yarns, i.e., the problem of silver exposure in conventional high-brightness reflective yarns.

[0011] An object of the present invention is to provide a reflective yarn that is easy to produce, can be produced with a small amount of reflective film, and prevents glass microspheres from falling off. [Means for solving the problem]

[0012] The reflective yarn provided by the present invention is a substrate layer having two surfaces; a plurality of glass microspheres adhered to at least one surface of the substrate layer via at least one adhesive layer to form at least one layer of glass microspheres; a covering layer made of resin, having light transmittance, and covering the entire reflective thread; The reflective thread is formed by laminating the base material layer, the glass microspheres, and the adhesive layer, and has two surfaces and a side other than the two surfaces, and the plurality of glass microspheres are provided on at least one surface of the reflective thread.

[0013] The reflective thread further includes at least one reflective layer provided on the bottom side of the glass microspheres to reflect light.

[0014] As a result, the glass microspheres of the reflective yarn are covered with the covering layer, which protects the glass microspheres and prevents them from falling off, allowing the reflective yarn to be knitted. Even if the reflective yarn is pulled by the needles of a circular knitting machine, the glass microspheres will not fall off or come off, preventing damage to the knitting machine and maintaining the full reflective function of the reflective yarn.

[0015] The covering layer encases the glass microspheres and covers the sides of the reflective threads.

[0016] Preferably, the coating layer is a resin containing acrylic acid and a silane, or a resin containing thermoplastic polyurethane and a silane, or a resin containing acrylic acid, a silane, and a thermoplastic polyurethane.

[0017] Preferably, the coating layer is a resin containing silane to improve the bonding between the coating layer and the glass microspheres.

[0018] Preferably, the covering layer is a colored resin, and the reflective thread is colored. The sides of the reflective thread are the color of the covering layer. The reflective thread of the present invention is produced by cutting a reflective film, and the color of the reflective thread is determined by the color of the covering layer. Therefore, regardless of whether the reflective thread needs to be colored or not, there is no need to color the reflective film, making the production of the reflective film easier. Colored reflective threads can be produced in small quantities, even for small orders, without being limited by the number of orders, solving the problem in the industry that colored reflective films and reflective threads cannot be produced in small quantities.

[0019] A transparent pigment is added to the resin of the coating layer, and the pigment is a transparent dye or coloring material.

[0020] Preferably, the coating layer is made by drying a liquid resin.

[0021] Preferably, the adhesive layer is made of an acrylic or polyurethane-containing material so that the coating layer and the adhesive layer have good bonding properties.

[0022] Preferably, there is a gap between two adjacent glass microspheres, and the coating layer forms a larger thickness through each gap, so that if the coating layer has color, more ink, pigment, or coloring material will be accumulated in the gaps, resulting in a higher color purity and a more vivid color.

[0023] The reflective thread of the present invention cannot be protected with polyvinyl alcohol (PVA) because it dissolves when exposed to water and becomes sticky in humid environments. If liquid polyvinyl alcohol is applied to the outer surface of the reflective thread of the present invention, the polyvinyl alcohol takes a long time to mature, and the viscosity of the polyvinyl alcohol would cause the reflective thread to stick, making it impossible to fabricate the thread. Therefore, polyvinyl alcohol cannot be used in the present invention.

[0024] The reflective yarn of the present invention may have a covered yarn structure in which at least one covering yarn is wound around the periphery of the reflective yarn, or may have a covered yarn structure in which at least two covering yarns are wound around the periphery of the reflective yarn in the S direction and the Z direction, respectively, to form a reflective composite yarn. The covering yarn covers the reflective yarn so that the glass microspheres are exposed to the maximum extent. The outer peripheries of the reflective yarn and the covering yarn in the reflective composite yarn are covered with a covering layer. [Brief explanation of the drawings]

[0025] The objects, features and advantages of the present invention can be understood from the following description of preferred embodiments and drawings. [Figure 1] FIG. 1 is a schematic vertical cross-sectional view of a conventional reflective film. [Figure 2] FIG. 2 is a cross-sectional view of a conventional reflective thread cut out from the reflective film of FIG. 1. [Figure 3] 1 is a schematic vertical cross-sectional view of a reflective film according to a preferred embodiment of the present invention. [Figure 4] 4 is a schematic three-dimensional view of a reflective thread according to a preferred embodiment of the present invention cut out from the reflective film of FIG. 3. [Figure 5] FIG. 5 is a cross-sectional view taken along line 5-5 in FIG. [Figure 6] 1 is a schematic cross-sectional view of a reflective yarn product having a covering layer according to a first preferred embodiment of the present invention. [Figure 7] FIG. 7 is a schematic diagram of a process for covering the reflective yarn of FIG. 6 with the covering layer. [Figure 8]FIG. 2 is a schematic cross-sectional view of a reflective yarn product having a covering layer according to a second preferred embodiment of the present invention. [Figure 9] FIG. 10 is a schematic cross-sectional view of a reflective yarn product having a covering layer according to a third preferred embodiment of the present invention. [Figure 10] FIG. 10 is a schematic cross-sectional view of a reflective yarn product having a covering layer according to a fourth preferred embodiment of the present invention. [Figure 11] 1 is a photograph of an actual reflective yarn product according to a preferred embodiment of the present invention. [Figure 12] 1 is a three-dimensional schematic diagram of a reflective composite yarn comprising a reflective yarn of the present invention and two covering yarns. [Figure 13] FIG. 13 is a cross-sectional view taken along line 13-13 in FIG. [Figure 14] FIG. 1 is a three-dimensional schematic diagram showing how a reflective yarn and a yarn of the present invention are twisted to form a twisted yarn. DETAILED DESCRIPTION OF THE INVENTION

[0026] The present invention relates to a reflective yarn having glass microspheres, which can transmit light. The technical means of the present invention prevents the glass microspheres of the reflective yarn from falling off or dropping off, so that the reflective yarn of the present invention can be woven into a fabric by a knitting machine without impairing the reflective function of the reflective yarn.

[0027] (First Preferred Embodiment) 3, there is shown a reflective film 30 comprising a substrate layer 32 and two layers of glass microspheres 34. The substrate layer 32 has two opposite surfaces, and the glass microspheres 34 are adhered to the two surfaces of the substrate layer 32 via an adhesive layer 36. A two-layer reflective layer 38 is provided below the two layers of glass microspheres 34. The thickness of the reflective film 30 in this preferred embodiment is about 0.1 mm to 0.4 mm, preferably 0.25 mm to 0.35 mm.

[0028] The base layer 32 may be an elastic polymer or a non-elastic polymer. The elastic polymer may be selected from materials such as, but not limited to, thermoplastic polyurethane (TPU), polyurethane (PU), thermoplastic elastomer (TPU), thermoplastic rubber (TPR), or silicone. The non-elastic polymer may be selected from materials such as, but not limited to, polyester, polyethylene terephthalate (PET), rigid polyvinyl chloride (PVC), oriented polypropylene (OPP), or nylon. The base layer 32 may be a fabric instead of a polymer.

[0029] The reflective layer 38 is provided on the bottom side (inner surface) of the glass microspheres 34 constituting the layer, and the bottom side (inner surface) of the plurality of glass microspheres 34 is partially embedded in each of the adhesive layers 36 and then adhered to the base layer 32 via the adhesive layers 36. The top side (outer surface) of the plurality of glass microspheres 34 is exposed to the adhesive layer 36.

[0030] The adhesive layer 36 is made of a resin material, and any resin that is used as an adhesive can be used as the material for the adhesive layer 36. Preferably, but not limited to, the adhesive layer 36 is a polyurethane adhesive or an acrylic adhesive.

[0031] The reflective layer 38 is preferably made of a light-reflective metal material such as aluminum or silver, but is not limited thereto, and is deposited by vapor deposition, sputtering, or chemical coating on the bottom side of the glass microspheres 34. The reflective layer 38 made of aluminum or silver has high light reflectivity, and the resulting reflective thread has a high reflected light brightness. The reflective layer 38 can also be made of other materials such as zinc sulfide, and in the case of zinc sulfide reflective thread, the reflective layer can provide a reflected light with a medium brightness value, such as 100 to 200 lumens.

[0032] When the reflective film 30 is cut with a cutter along its length, it can be cut into multiple reflective threads 40, each of which has a considerable length. Figures 4 and 5 are schematic diagrams of a cut reflective thread 40. The reflective thread 40 is a laminated structure formed by laminating the aforementioned substrate layer 32, glass microspheres 34, adhesive layer 36, and reflective layer 38. The reflective thread 40 has two opposing surfaces (e.g., the top and bottom surfaces shown in Figures 4 and 5) and side edges other than the two surfaces. The multiple glass microspheres 34 are exposed on the two surfaces of the reflective thread 40. When viewed from the direction shown in Figure 5, both side edges (both surfaces) 42 of the reflective thread 40 are cut surfaces, and no glass microspheres 34 are present on the side edges 42. Light is retroreflected by the glass microspheres 34 and reflective layer 38, resulting in a reflective thread with a high reflective brightness. The width of the reflective thread 40 is 0.15 mm to 1 mm, preferably 0.28 mm to 0.50 mm, more preferably 0.30 mm to 0.38 mm, and the thickness is the same as that of the reflective film 30 .

[0033] In order to prevent the exposed glass microspheres 34 of the reflective thread 40 of Fig. 5 from falling off or dropping, referring to Fig. 6, the present invention covers the entire reflective thread 40 of Fig. 5 with a resin coating layer 50 to form a reflective thread 40A covered with the coating layer 50 shown in Fig. 6, and the coating layer 50 has optical transparency and allows light to pass through. In terms of implementation, the coating layer 50 may be colorless and transparent or colored, and the color of the coating layer 50 makes the reflective thread 40A a colored reflective thread.

[0034] FIG. 7 is a schematic diagram of a manufacturing process illustrating a preferred embodiment of the present invention in which the coating layer 50 is applied to the outer surface of the reflective thread 40. As shown in the figure, each cut reflective thread 40 is unwound from reel A and introduced into a solution bath 54 via roller 52. A resin solution 55 is stored in the solution bath 54, and the reflective thread 40 is immersed in the resin solution 55 until the entire outer surface of the reflective thread 40 is coated with the liquid resin. The resin-coated reflective thread 40A is then removed from the solution bath 54 and dried in a drying device to form the coating layer 50. The resulting reflective thread 40A is then wound for later use, for example, around reel B. The drying device may be a single drying unit or may have multiple drying units, as shown in FIG. 7. The first drying unit 56 shown in FIG. 7 may be various drying devices, such as a dryer, a hot roller, or a heating pipe. The second drying unit 58 may be a hot roller or a dryer, and one or more continuous hot rollers may be used as a drying device for drying the resin that coats the reflective threads 40A.

[0035] In this preferred embodiment, the resin component of the resin solution 55 includes a coloring material such as silane and a pigment, and the pigment is a dye or coloring material with extremely high transparency. The extremely transparent pigment has a low light blocking rate and does not hinder light transmission through the coating layer 50. The silane may be an oil-based or water-based silane, and the transparent pigment is an extremely transparent ink, which may be a water-based ink or an oil-based ink. According to the reflective yarn 40 manufactured by the applicant, the reflected light brightness value of the bare yarn is 600 lumens, while the reflected light brightness of the reflective yarn 40A with the coating layer 50 still reaches 400 lumens.

[0036] The resin of the coating layer 50 may be a resin containing acrylic acid and silane, or a resin containing thermoplastic polyurethane and silane, or a mixture of acrylic acid, silane, and thermoplastic polyurethane. The silane in the resin has good bonding and adhesion properties with the adhesive layer 36 of the reflective thread and the glass microspheres 34. The silane is suitable for both acrylic and polyurethane resins, regardless of whether the adhesive layer 36 is an acrylic or polyurethane adhesive, and the coating layer 50 can bond well with the adhesive layer 34. At the same time, the silane can grab and hold the glass microspheres 34, i.e., the silane has good bonding properties with the glass microspheres, making them less likely to separate.

[0037] In a preferred embodiment of the present invention, one component of the resin solution 55 includes a pigment (e.g., a transparent ink), an auxiliary agent (i.e., a silane), a crosslinking agent (hardener), a TPU resin, and an organic solvent (VOC). In a preferred embodiment of the present invention, another component of the resin solution 55 includes a pigment, an auxiliary agent (i.e., a silane), a crosslinking agent, an acrylic resin, and an organic solvent.

[0038] (Second Preferred Embodiment) FIG. 8 is a cross-sectional view of a reflective yarn 40A according to a second preferred embodiment of the present invention, which has a structure substantially the same as that of the reflective yarn 40A shown in FIG. 6, and includes a base layer 32, a plurality of glass microspheres 34, two adhesive layers 36, and a covering layer 50, wherein the two layers of glass microspheres 34 are respectively adhered to two opposite surfaces of the base layer 32 via the two adhesive layers 36, and the covering layer 50 covers the entire reflective yarn.

[0039] The reflective yarn 40A in FIG. 8 does not have a reflective layer, and therefore the brightness value of the reflected light is low.

[0040] (Third Preferred Embodiment) FIG. 9 shows a reflective yarn 40A according to a third preferred embodiment of the present invention, which includes a substrate layer 32, two layers of glass microspheres 34, two adhesive layers 36, two reflective layers 38, and a coating layer 50. The reflective yarn 40A is stretched, and its cross-sectional shape is approximately elliptical. After stretching, the reflective yarn 40A has favorable physical properties, and the two adhesive layers 36 form a larger specific surface area, so that the glass microspheres 34 are distributed over a larger proportion of the area, while the area of both sides 42 of the reflective yarn is reduced. In this preferred embodiment, the reflective yarn 40 is first stretched, and then coated with the coating layer 50 shown in FIG. 7 to produce the reflective yarn 40A. The reflective layer 38 may be aluminum, silver, or zinc sulfide. In this preferred embodiment, there are gaps 341 between two adjacent glass microspheres 34, the coating layer 50 is colored, and the coating layer has a greater thickness 51 in each gap 341 (thicker than the thickness of the coating layer on the surface of the glass microspheres), so that the ink accumulated in the gaps 341 is thicker and the amount of ink is greater, resulting in a higher color purity and a more vivid color of the reflective thread 40A.

[0041] (Fourth Preferred Embodiment) FIG. 10 shows a reflective yarn 40A according to a fourth preferred embodiment of the present invention, which has almost the same structure and components as the reflective yarn of FIG. 9, including a substrate layer 32, two layers of glass microspheres 34, an adhesive layer 36, and a covering layer 50. The only difference is that the reflective yarn 40A of FIG. 10 does not have a reflective layer. The covering layer 50 covers the entire reflective yarn. Similarly, the covering layer 50 forms a large thickness 51 due to the gaps 341 between two adjacent glass microspheres 34, so that the ink that accumulates in the gaps 341 is thicker and the amount of ink is greater, resulting in a purer and more vivid color of the reflective yarn 40A.

[0042] As shown in Figures 6, 8-10, the coating layer 50 of the reflective yarn 40A produced according to the present invention completely covers the reflective yarn 40, and the glass microspheres 34 are enclosed within the coating layer 50. The coating layer 50 protects the glass microspheres and prevents them from falling off the reflective yarn. Furthermore, the resin in the coating layer 50 and the glass microspheres 34 have good adhesion and bonding properties, maintaining the positioning of the glass microspheres 34. Therefore, the reflective yarn 40A can be knitted on various knitting machines. Even when the reflective yarn 40A is pulled with the needles of a circular knitting machine or a warp-knitting computerized jacquard machine, the glass microspheres 34 will not fall off or fall off. This effectively solves the problem of glass microspheres falling off the knitting machine and damaging the knitting machine, as well as the problem of the reflective performance of conventional reflective yarns being impaired. The resin-based coating layer 50 continues to coat the reflective yarn 40 and is not dissolved, peeled off from the reflective yarn 40, or sticky.

[0043] The reflective thread 40A of the present invention solves the problems of conventional high-brightness reflective threads, such as the silver exposure (conspicuous silver) on the sides and the different colors at different positions on the reflective thread. In a preferred embodiment of the reflective thread 40A shown in Figures 6 and 9, the coating layer 50 is transparent red. Since the coating layer 50 covers the entire reflective thread, the two surfaces (top and bottom) and both sides 42 of the reflective thread 40A are all red, making them the same color everywhere. There is no silver exposure on the sides of the reflective thread 40A. Figure 11 is an actual photograph of the reflective thread 40A shown in Figure 9 (this specification is shown in black and white), and Figure 11 demonstrates that the top, bottom, and sides of the reflective thread 40A are all the same color.

[0044] If there is no need to color the reflective thread 40A, there is no need to add a pigment to the resin solution 55 for forming the covering layer 50. If it is desired to color the reflective thread 40A of the present invention, there is no need to prepare a colored reflective film 30 (i.e., there is no need to prepare a colored layer on the reflective film 30), but the covering layer 50 is colored and the reflective thread is covered with the colored covering layer 50 to form a colored reflective thread. Therefore, regardless of whether the reflective thread 40A needs to be colored or not, there is no need to prepare a colored reflective film 30, which simplifies the production of the reflective film 30 and reduces the inventory cost of the reflective film 30.

[0045] According to the structure of the reflective yarn 40A of the present invention, when it is desired to produce colored reflective yarn 40A, it is not necessary to produce a colored reflective film, so that it is possible to produce colored reflective yarn 40A in small quantities, which solves the problem that the industry cannot produce colored reflective films in small quantities.

[0046] The reflective brightness value of the reflective yarn 40A in Figures 6 and 9 can reach 300 lumens or more, and the present invention can provide a reflective yarn with a high reflective brightness value, and the higher the reflective performance, the better the safety and protection effects can be achieved.

[0047] Figures 12 and 13 show a reflective yarn 60 according to a fifth preferred embodiment of the present invention, which may be an unstretched reflective yarn as shown in Figures 6 and 8, or may be a stretched reflective yarn as shown in Figures 9 and 10. The reflective yarn 60 has one substrate layer 62, two layers of glass microspheres 64, two adhesive layers 66, and two reflective layers 68, with gaps 641 formed between the glass microspheres 64. The reflective yarn 60 is covered with at least one covering yarn to form a reflective composite yarn 70. For example, the covering yarn is wrapped around the periphery of the reflective yarn in the S-direction or Z-direction, and the covering yarn can be a monofilament yarn or a multifilament yarn. The reflective yarn 60 constitutes the core yarn of the reflective composite yarn 70.

[0048] In this preferred embodiment, two covering threads 72, 74 are used to cover the outer periphery of the reflective thread 60 in the S and Z directions, respectively, and these two covering threads 72, 74 can reinforce the strength of the reflective thread 60. Preferably, the two covering threads 72, 74 cover the reflective thread 60 so that more or the largest number of glass microspheres are exposed, so that the reflective effect is not reduced or is not reduced too much. As shown in Figure 12, the area where the glass microspheres are exposed on the outer surface of the reflective thread 60 is larger than the area covered by the two covering threads 72, 74, and the reflective thread 60 still has a fairly good reflective effect.

[0049] The reflective composite yarn 70 is processed through the process shown in Fig. 7, and its outer surface is provided with a covering layer 50. As shown in Fig. 13, the outer surface of the reflective yarn 60 and the outer surfaces of the two covering yarns 72, 74 are all covered with the covering layer 50. The covering layer 50 envelops the entire reflective yarn 60 to prevent the glass microspheres 64 of the reflective yarn 60 from falling off, and the two surfaces (top and bottom) and two sides 61 of the reflective yarn 60 are the same color, solving the problems of silver leakage (appearing silver) on the sides of conventional high-brightness reflective yarns and the color of the reflective yarn varying depending on the position.

[0050] Figure 14 shows a reflective yarn 80 according to a sixth preferred embodiment of the present invention, which may be an unstretched reflective yarn as shown in Figure 6 or Figure 8, or a stretched reflective yarn as shown in Figure 9 or Figure 10. The reflective yarn 80 is twisted with one yarn 82 or multiple yarns to form a twisted yarn 85 that serves as the core yarn of the reflective composite yarn, and one or more covering yarns such as covering yarns 72, 74 as shown in Figure 12 are wrapped around the twisted yarn 85 to form a single reflective composite yarn. A covering layer is provided on the outer surface of the reflective composite yarn, and the outside of the twisted yarn 85 and the outer surface of the covering yarn are covered with the covering layer.

[0051] The reflective yarn provided by the present invention can solve many of the problems associated with conventional manufacturing and weaving of reflective yarn. [Explanation of symbols]

[0052] 10 Reflective film 12 Base material layer 14 Bonding layer 16 Glass microspheres 18 Reflective layer 20 Reflective thread 30 Reflective film 32,62 Base material layer 34,64 Glass microspheres 36,66 Adhesive layer 38,68 reflective layer 341,641 gap 40 Reflective thread (without coating) 42,61 side 40A, 60, 80 reflective thread 50 Covering layer A and B windings 52 Laura 54 Solution tank 55 Resin Solution 56 First Drying Unit 58 Second Drying Unit 70 Reflective composite thread 72,74 Covered yarn 82 Thread 85 Twisted Yarn

Claims

1. a substrate layer having two opposing surfaces; a plurality of glass microspheres adhered to at least one surface of the substrate layer via at least one adhesive layer to form at least one glass microsphere layer; a covering layer made of resin, having optical transparency, and covering the reflective thread (including enveloping the glass microspheres and covering the sides of the reflective thread); A reflective yarn comprising: the reflective thread is formed by laminating the base material layer, the glass microspheres, and the adhesive layer, and has two surfaces and a side other than the two surfaces, and the at least one layer of glass microspheres is provided on at least one surface of the reflective thread; Reflective thread that prevents glass microspheres from falling.

2. a substrate layer having two opposing surfaces; a plurality of glass microspheres adhered to at least one surface of the substrate layer via at least one adhesive layer to form at least one glass microsphere layer; at least one reflective layer disposed on the bottom side of the plurality of glass microspheres; a covering layer made of resin, having optical transparency, and covering the reflective thread (including enveloping the glass microspheres and covering the sides of the reflective thread); A reflective yarn comprising: the reflective yarn is formed by laminating the base material layer, the glass microspheres, the adhesive layer, and a reflective layer, and has two surfaces and a side other than the two surfaces, and the at least one glass microsphere layer and the at least one reflective layer are provided on at least one surface of the reflective yarn; Reflective thread that prevents glass microspheres from falling.

3. 3. The reflective thread according to claim 1, wherein the coating layer is a resin containing acrylic acid and a silane, or a resin containing thermoplastic polyurethane and a silane, or a resin containing acrylic acid, a silane, and a thermoplastic polyurethane, or a resin containing silane.

4. 3. The reflective thread according to claim 1, wherein the resin of the coating layer is colored.

5. 5. The reflective thread according to claim 4, wherein a transparent pigment is added to the resin of said coating layer.

6. The reflective thread according to claim 5, wherein the transparent pigment is a transparent ink.

7. The reflective thread according to claim 4 , wherein the sides of the reflective thread have the color of the coating layer.

8. The reflective thread according to claim 1 or 2, wherein the coating layer is formed by applying heat to a liquid resin.

9. 3. The reflective thread according to claim 1 or 2, wherein the adhesive layer is made of an acrylic acid-containing material or a polyurethane-containing material.

10. 3. The reflective thread according to claim 1, wherein there are gaps between two adjacent glass microspheres, and the coating layer forms a greater thickness in each of the gaps.

11. 11. The reflective thread according to claim 10, wherein the coating layer is colored, and the amount of pigment or coloring material that forms the color of the coating layer is greater in the plurality of gaps.

12. 3. A reflective yarn according to claim 1 or claim 2, comprising at least one covering yarn, the at least one covering yarn covering the outer periphery of a reflective yarn to form a reflective composite yarn, the reflective yarn constituting a core yarn of the reflective composite yarn, and the outer peripheries of the reflective yarn and the at least one covering yarn being covered by a covering layer.

13. The reflective yarn according to claim 12, wherein the reflective yarn and at least one other yarn form a twisted yarn, the twisted yarn constituting a core yarn of a reflective composite yarn, and the outer periphery of the twisted yarn being covered with a covering layer.

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