JP2018111223A - Narrow tape with high luminance light emission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a narrow tape capable of being used for various applications, emitting a light immediately when an external light is received and emitting a light vividly for long time even with short light irradiation time.SOLUTION: A narrow tape has a retroreflection layer consisting of a transparent globule with a uniform single layer arranged on a surface, a phosphorescent layer of a transparent resin formed in a reverse side of the retroreflection layer, a bright enhancement layer of a white resin containing a crush glass, and a backup layer consisting of a white resin which reflects a light passed through the bright enhancement layer and thickness of the phosphorescent layer is 600 to 1500 μm.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a high-brightness narrow-width tape that can be used for various purposes, and more particularly to a narrow-width tape that emits light immediately upon receiving external light and emits light vividly for a long time even when the light irradiation time is short.

  Evacuation guidance signs are affixed to various places such as automobiles, ships, vehicles such as trains and airplanes, building walls and fences, window glass, doors, pillars, and stairs, and are widely used as display devices. Conventionally, indoor evacuation guidance signs have generally been used as night lights by storing small fluorescent lamps so that they can be seen at night and in the dark. With this nightlight type, if a power outage suddenly occurs due to an earthquake or power supply is stopped due to a planned power outage, it may not be visible at all, and evacuation guidance that is particularly necessary in an emergency such as an earthquake or power outage becomes impossible. In addition, the nightlight type does not meet the problem of power saving.

  For this reason, it has been practiced before that general evacuation guidance signs are phosphorescent. For example, JP 2001-249615 relates to a phosphorescent sheet in which a phosphorescent layer containing 20 to 80% by weight of a phosphorescent material is laminated on one surface of a light-impermeable film. In Japanese Patent Application Laid-Open No. 2007-186967, a decorative layer having a phosphorescent or fluorescent pattern is formed on one surface of a glass plate having a thickness of 5 mm or 10 mm, and a foamed glass layer is further laminated. Japanese Patent Application Laid-Open No. 2007-200036 discloses an induction display body in which a phosphorescent sheet is sandwiched between a surface glass plate and a substrate, and this phosphorescent sheet is coated with a phosphorescent material on a polyester film base sheet. On the other hand, the surface glass plate is a highly permeable tempered glass having a thickness of about 3 to 15 mm for indoor use.

  The phosphorescent sheet generally does not have a long light emission duration and does not emit light immediately even when it receives strong light directly. This kind of phosphorescent sheet does not exhibit sufficient guidance performance because it does not reflect light with a flashlight during rescue operations as an evacuation guidance sign for outdoor use. In order to improve this point, in Japanese Patent Application Laid-Open No. 2007-114271, Japanese Patent Application Laid-Open No. 2009-133970, and Japanese Patent Application Laid-Open No. 2014-164082, a structure in which a retroreflective material is laminated on the upper surface of a phosphorescent layer in traffic signs and evacuation guidance signs It is.

JP 2001-249615 A JP 2007-186967 A JP 2007-200036 A JP 2007-114271 A JP 2009-133970 A JP, 2014-164082, A

  Regarding a sheet having a retroreflective layer and a phosphorescent layer, Japanese Patent Application Laid-Open No. 2007-114271 has an example in which a back member is disposed on the front or rear surface of the phosphorescent layer, or a back surface protective material is attached to the back side of the phosphorescent layer. Even if the back member and the back surface protective material are in the same sheet shape as the phosphorescent layer, only that the back member may be metal is disclosed, and nothing is disclosed about the contents of the material. This back member may be affixed to the front surface of the phosphorescent layer, and in this case, it can be estimated that it is a material having translucency.

  Moreover, the retroreflective phosphorescent sheet disclosed in JP2009-133970A and JP2014-164082 includes a retroreflective layer and a phosphorescent layer, and a white reflective layer or a light shielding layer is formed on the rear surface of the phosphorescent layer, Light emitted backward from the phosphorescent layer is reflected as white scattered light, making the sheet surface more vivid. The white reflective layer is made of a non-yellowing urethane prepolymer, an amine curing agent and a titanium white pigment before molding. On the other hand, the light-shielding layer is coated with a white pigment made of titanium oxide on the front surface.

  In the above phosphorescent sheet, the phosphorescent layer generally has a considerable thickness and has almost the same large area as the sheet. Therefore, the amount of phosphorescent agent contained exceeds a certain level, and the emission luminance is not so strong and the afterglow is relatively short. Even if it is time, it is possible to obtain light emission luminance and afterglow time that are close to desired as a whole. However, if the tape has a width of less than about 5 mm, even if the phosphorescent layer has the same thickness as the phosphorescent tape, the volume is much smaller. Even if only the phosphorescent layer is thickened, the entire phosphorescent agent is contained. Since the amount does not increase so much, the light emission brightness of the narrow tape does not increase even at the beginning, and the afterglow time is so short that it cannot be identified at night.

  The present invention has been proposed in order to improve the above-mentioned problems relating to a narrow tape having a phosphorescent layer. The retroreflective layer emits light immediately upon irradiation, and even if the irradiation time is relatively short, An object of the present invention is to provide a high-intensity light-emitting narrow tape that emits light at a predetermined luminance. Another object of the present invention is to provide a high-intensity light-emission narrow tape that can be used as a decorative string with a single tape, or can be affixed and sewn to a ready-made product. That is. Another object of the present invention is to provide a high-intensity light-emitting narrow tape that can be embedded and bonded after molding of a plastic product or can be attached as a decorative body in a transparent tube.

  The high-intensity light-emitting narrow tape according to the present invention is a flexible tape that is cut into a thin string shape and can emit light at all times at night. This narrow-width tape has a retroreflective layer composed of uniform single-layer transparent globules arranged on the surface, a phosphorescent layer of transparent resin formed on the back side of the retroreflective layer, and a white resin containing crash glass And a backup layer made of a white resin that reflects the light that has passed through the glitter enhancement layer, the phosphorescent layer has a thickness of 600 to 1500 μm, and the light emitted from the phosphorescent layer is By passing through the lower brightness enhancement layer, light is emitted more vividly.

  In the narrow tape of the present invention, the finished product can be retrofitted by adhering a double-sided tape to the back side of the backup layer. Preferably, in the retroreflective layer, a transparent or translucent reflective layer is provided below the glass bead array. Preferably, the phosphorescent layer has a thickness of 600 to 1500 μm, the phosphorescent agent is contained in an amount equal to or more than twice the transparent base resin, and a resin kneaded with the phosphorescent agent It is a transparent silicone resin. The glitter enhancement layer is preferably made of a white silicone resin containing a large amount of crush glass having an average particle size of 10 to 250 μm.

  Since the thin tape according to the present invention includes a glitter enhancement layer and a light shielding layer containing a white resin crash glass on the lower surface of the retroreflective layer and the phosphorescent layer, even if it is a narrow tape having a width of about 5 mm or less, It emits light vividly for a long time without a power source, and can be used for various purposes such as embedding in molded products such as helmets and toys, sewing on various clothing, and using it alone as a decoration material. In addition, since the narrow tape of the present invention has a retroreflective layer, it emits light immediately upon irradiation with light, and can be attached to products used for night work or work clothes such as road works by sticking or sewing.

  In the narrow tape according to the present invention, the entire material including the binder layer of the front-side retroreflective layer is made of silicone resin or urethane resin, so that it has flexibility and can be freely bent when used for decoration purposes. In addition, it is excellent in terms of water resistance, abrasion resistance, chemical resistance, oxidation resistance, and the like. In particular, if the glitter enhancement layer is made of a silicone resin containing a large amount of crash glass, the glitter enhancement layer and the light shielding layer located under the phosphorescent layer are inexpensive and have flame retardancy. Cost can be reduced.

  The narrow tape according to the present invention emits light for a long time even when the width is narrow, and can obtain light emission luminance corresponding to the S200 class high-intensity phosphorescent guidance sign level of certified products such as fire fighting equipment. The narrow tape of the present invention does not require a power source even if it emits light with high luminance, and is relatively lightweight because it is entirely made of flexible plastic.

It is an expansion cross-sectional view of the narrow tape which concerns on this invention. It is an expansion cross-sectional view which shows the other example of a narrow tape. It is an expanded cross-sectional view which shows another example of a narrow tape. It is an expansion perspective view which shows the example which uses a narrow tape as a braid. It is (1) principal part expanded sectional view and (2) perspective view which show the example which encloses a narrow tape in a transparent tube, and uses it for an earphone. It is (1) principal part expanded sectional view and (2) perspective view which show the example which embeds and uses the narrow tape in the helmet of a plastic molded product. It is a perspective view which shows the example used by sewing a narrow tape on bags. It is a perspective view which shows the example which affixes and uses a narrow tape on a bicycle.

  The narrow tape 1 according to the present invention is a thin string having excellent followability to a curved surface even when the adhesive or embedded surface is a curved surface if the width is 0.5 to 5 mm, preferably less than 3 mm. What is necessary is just to cut and manufacture from the sheet material of this. If the bonding or embedding location of the member you want to maintain for the purpose of maintaining high brightness is a relatively flat surface or an installation surface with a gentle radius of curvature, secure a large light emitting area by cutting it to a width of 5 mm. Thus, a tape that exhibits stable brightness for a longer time can be obtained. In addition, when the place where the member to be equipped with the narrow tape 1 is bonded or buried is too narrow to fit within the range of 5 mm, or when there is unevenness or a curved surface with a sharp curvature radius, 2 mm is required. When cut into a width and used, it is possible to obtain a tape that fits appropriately within a predetermined range and has an excellent aesthetic appearance without causing wrinkles or the like after pasting or embedding. The narrow tape 1 has a multilayer structure as shown in FIGS. 1 to 3, and the actual thickness is only about 2 mm including the adhesive layer. As shown in FIG. 1, the retroreflective layer 2 exists on the surface of the narrow tape 1 and immediately emits light when irradiated with light, so that it can be applied to night work members.

  In the thin tape 1, the retroreflective layer 2 includes a uniform single-layer transparent sphere 3 disposed on the surface, and a lower portion covering the lower side of the transparent sphere and having a lower refractive index than the transparent sphere. It consists of a reflective resin layer 5. The transparent sphere 3 may be a bead such as glass having a diameter of about 35 to 60 μm. The reflective resin layer 5 can be made of a silicone resin, urethane resin, ethylene-vinyl acetate copolymer resin, polyester resin, etc., which has high transparency and good transmission performance, and is relatively flexible and has good light transmittance. A resin is preferred. Various types of additives may be added to the reflective resin layer 5 before molding to improve heat resistance, wear resistance, water resistance, and chemical resistance.

The reflective resin layer 5 may be composed of two or more transparent reflective layers. In this case, as the second transparent reflective layer, ZnS, CdS, CeO ₂ , GaAs, Ge, ZrO ₂ , Bi ₂ O ₃ , It is preferable to use a transparent metal thin film such as ZnSe. The thickness of the second transparent reflective layer is 300 to 3000 mm, preferably 500 to 1500 mm. When the thickness of the transparent reflective layer is too thin, the retroreflection performance is lowered and the durability is lowered. As this reflective resin layer, in addition to the reflective resin layer 5 and the second transparent reflective layer, another transparent reflective layer having a lower refractive index may be laminated.

  In addition, a transparent protective layer 7 (FIG. 3) can be formed on the surface of the retroreflective layer 2 in order to increase the wear resistance of the surface. The transparent protective layer 7 can be subjected to surface treatment after molding, even if various additives are added before molding to improve heat resistance, water resistance, chemical resistance, and the like. The transparent protective layer 7 is preferably a flexible silicone resin, urethane resin, polyester resin or the like.

  As illustrated in FIG. 1, the retroreflective layer 2 is bonded to the surface of the phosphorescent layer 8 via a binder layer 6 positioned below. The binder layer 6 may be a transparent or white resin having translucent reflectivity, a light refractive index smaller than that of the reflective resin layer 5 and having light transmissivity. The binder layer 6 is preferably provided with flexibility and stretchability corresponding to the phosphorescent layer 8. The retroreflective layer 2 including the binder layer 6 may be a single sheet from the beginning or may be in the form of a long roll. After forming the phosphorescent layer 8, etc., the retroreflective layer 2 is formed into a single sheet and is further formed into a narrow tape. You can do it.

As illustrated in FIG. 2, the phosphorescent layer 8 can be provided directly on the lower surface of the reflective resin layer 5 without providing the binder layer 6. The phosphorescent layer 8 has light yellowish green, pale blue, and pale yellow as a whole due to the phosphorescent agent contained in an equal amount or more with respect to the base resin. The phosphorescent agent is a substance that continuously emits light stored under bright conditions in the dark for a certain period of time, and selects a substance having high luminance and long persistence. As this phosphorescent agent, a type (SrAl ₂ O ₄ : Eu, Dy) obtained by adding a rare earth element activator containing strontium aluminate as a main component, a type in which copper is bonded to zinc sulfide (ZnS: Cu), etc. A self-luminous luminous agent containing some radioactive material can be used depending on the application.

  In the phosphorescent layer 8, there are many phosphorescent agents added to the base resin, ranging from a powder type having a particle size of 5 to 150 μm to a granular type having a particle size of 400 to 1000 μm. Usually, a phosphorescent agent having a particle size of about 200 μm or more is added. Moreover, the base resin mixed with the phosphorescent agent is preferably flame-retardant and transparent or translucent that does not hinder the afterglow luminance. For example, silicone resin, urethane resin, ethylene-vinyl acetate copolymer resin, Polyester resins are supported.

  About the phosphorescent ink obtained by mixing the phosphorescent agent, the phosphorescent agent is contained in an equal amount or more with respect to the base resin, and preferably the phosphorescent agent is contained in an amount equal to or more than twice the base resin. At this time, if the phosphorescent agent is less than an equivalent amount with respect to the base resin, the afterglow luminance cannot be sufficiently increased, while the phosphorescent agent is contained more than twice with respect to the base resin. In this case, the viscosity of the phosphorescent ink decreases, and smooth screen printing cannot be performed.

The phosphorescent layer 8 may be repeatedly screen-printed so as to have a thickness of 600 μm to 1500 μm in FIGS. At this time, if the thickness is less than 500 μm, the luminance after 60 minutes does not reach 60 mcd / m ² even if the luminance is 200 lux, the luminance disappears after 12 hours of half a day, and if the thickness is 600 μm or more, the luminance is 200 lux. The afterglow after 20 minutes reaches 200 mcd / m ² or more, but if the thickness is less than 1000 μm, it is difficult to increase the afterglow after 20 minutes to a high luminance of 250 mcd / m ² or more. On the other hand, when the thickness is 1000μm or more, can luminance after 20 minutes to 250mcd / ^{m 2} or more high intensity, is identifiable luminance even after half a day of 12 hours the number mcd / ^{m 2,} a thickness If it exceeds 1500 μm, the screen printing operation becomes complicated and uneconomical.

  In order to laminate the thickness of the phosphorescent layer 8 by 600 μm or more by screen printing, it is necessary to repeat the screen printing a plurality of times. Since the phosphorescent ink contains a phosphorescent agent, the screen mesh should be roughly 15 mesh. use. When the phosphorescent layer 8 is to be very thick, first, it is stroked with a squeegee a plurality of times to form about half the thickness, and the phosphorescent ink is placed on the screen with wet-on-wet before the printed part dries. Further, it is preferable to make a plurality of strokes with a squeegee. By performing such an operation, even if the phosphorescent layer 8 is very thick, it can be laminated to a substantially uniform thickness.

  The phosphorescent layer 8 is laminated above the retroreflective layer 2 at the time of manufacture, and is left as it is for about half a day to one day at room temperature. If there are bubbles in the phosphorescent layer, it is appropriately blown and defoamed. By this leaving treatment, the phosphorescent agent settles downward in the phosphorescent layer 8 and the back surface of the phosphorescent layer 8 is smoothed. . When the phosphorescent agent settles in the base resin, a light diffusion effect is produced, and the afterglow luminance can be increased. Since the base resin, such as silicone resin or urethane resin, is easy to peel off, the retroreflective layer 2 is then heat-treated at about 100 ° C. for 5 minutes to prevent delamination between the retroreflective layer and the phosphorescent layer 8. It is desirable. In this heat treatment, it is preferable to lightly press the whole.

  The glitter enhancement layer 10 is repeatedly screen-printed with a white resin glitter enhancement ink containing a large amount of additives such as crash glass. As an additive that imparts flame retardancy and brightness, crash glass is advantageous in terms of performance and cost, and silica, mica, talc, alumina, and the like can be added simultaneously with the crash glass. The white resin to be used is preferably flame retardant and has good reflectivity, such as silicone resin, urethane resin, polyester resin, etc., and as a colorant, titanium white, zinc white, zinc sulfide, etc. Added.

  The crush glass added to the glitter enhancement ink has a particle size of 10 to 250 μm, and an average particle size of 130 μm is usually optimum. In the glitter enhancement ink, the crash glass is contained in an equal amount or more with respect to the base resin, and preferably the crash glass is contained in the base resin in an amount equal to or more than twice the amount. At this time, if the crash glass is less than the equivalent amount of the base resin, the flame retardancy cannot be sufficiently increased, while the crash glass is contained more than twice the base resin. In this case, the viscosity of the glitter enhancement ink decreases, and smooth screen printing cannot be performed.

  In order to form the glitter enhancement layer 10 thickly by screen printing, it is necessary to repeat the screen printing a plurality of times, and the glitter enhancement ink contains a large amount of rough crush glass and the like, and has a high viscosity. Is preferably about 15 mesh coarse. If the glitter enhancement layer 10 is left for a while after being laminated, the surface of the glitter enhancement ink is smoothed. The brightness enhancement layer 10 has a thickness of 250 to 350 μm. When the thickness is within this range, the narrow tape 1 emits light vividly for a long time without power. Since silicone resins and urethane resins are easy to peel off, the retroreflective layer 2 is then heat treated at about 100 ° C. for 5 minutes to prevent delamination between the retroreflective layer and the phosphorescent layer 8 and the glitter enhancement layer 10. Is desirable. In this heat treatment, it is preferable to lightly press the whole.

  The light shielding layer 12 of white resin is formed on the entire surface of the glitter enhancement layer 10 by screen printing several times using a plain screen. The light-shielding ink may have the same composition as the glitter enhancement ink, does not contain crush glass, and contains titanium white, zinc white, zinc sulfide, and the like as colorants. The total thickness of the light shielding layer 12 together with the glitter enhancement layer 10 reaches 450 to 650 μm. The thickness of the light shielding layer 12 is 200 to 300 μm. When the thickness is within this range, the narrow tape 1 emits light vividly for a long time together with the glitter enhancement layer 10 under no power supply.

  If the adhesive layer 14 (FIG. 1) is formed, the adhesive layer may be laminated by screen printing, or a double-sided adhesive tape may be attached when the adhesive layer 14 is wet immediately after the light shielding layer 12 is applied. As an example of the adhesive layer, the adhesive layer 14 is formed by applying a double-sided adhesive tape so as not to include air when the light shielding layer 12 is wet immediately after being applied. The double-sided adhesive tape preferably has a flame retardancy such as silicone, and for example, a silicone pressure-sensitive adhesive is applied to both surfaces of a nonwoven fabric or cloth made of glass fiber or aramid fiber, and the heat resistance is preferably around 200 ° C. .

  The laminated sheet material on which the adhesive layer 14 is formed is passed through a mangle roll to prevent peeling, and is pressure-bonded with a uniform load applied to the entire sheet. Thereafter, it is desirable that the whole is heat-treated at about 80 ° C. for 20 minutes to relieve the overall stress. The thickness of the narrow tape 1 is about 1300 to 2000 μm including the adhesive layer 14. The narrow-width tape 1 is cut into a thin string after drying the laminated sheet material, so that if the width is 0.5 to 5 mm, preferably less than 3 mm, the adhesion surface is uneven or has a curved surface with a sharp curvature radius. However, it is possible to obtain a narrow tape having excellent followability.

  Regarding the adhesive layer 14, the relationship between the width of the narrow tape 1 and the adhesive force is such that the repulsion of the narrow tape 1> adhesive force as the tape width becomes wider. It is preferable to laminate a double-sided adhesive tape having However, the narrow tape 1 cannot be positioned once at the time of application, and is often peeled off and then re-adhered. In this case, if the adhesive force is too strong, peeling and re-adhesion cannot be performed smoothly, so that it can be used. A double-sided adhesive tape that is not suitable and is strongly bonded is generally expensive and increases costs, which is undesirable in sales. A silicone-based double-sided adhesive tape is suitable because it usually has an adhesive force that facilitates positioning and re-adhesion. Further, the laminated sheet material on which the adhesive layer 14 is formed can maintain the repulsion <adhesive force relationship of the narrow-width tape 1 if it is cut to a width of less than 3 mm, and is excellent in terms of cost. When is curved, it is preferable to cut to a width of less than 3 mm.

  Next, the present invention will be described based on examples, but the present invention is not limited to the examples. In order to manufacture the narrow tape 1 shown in FIG. 1, a translucent open lens retroreflective sheet (trade name: MT0001, manufactured by Unitika Sparklite) is used as the retroreflective layer 2. On the binder layer 6 of the sheet-like retroreflective layer 2, as shown in FIG. 2, the phosphorescent ink is laminated and the thick phosphorescent layer 8 is laminated.

The components of the phosphorescent ink used are as follows.
Phosphorescent agent (trade name: G-300L250N, manufactured by Nemoto Special Chemical Co., Ltd.) 2 parts by weight transparent silicone resin (trade name: GN-5N5, manufactured by Nippon Dam) 1 part by weight of solvent A suitable amount of this phosphorescent agent has an average particle size of 250 μm, The whole is kneaded into a resin paste.

  Since this phosphorescent ink has a high viscosity in a flat printing press, it is repeatedly printed using a plain screen. For the lamination of phosphorescent ink, first, a 15-mesh screen is stroked four times with a squeegee to form about half the thickness. If the phosphorescent ink is placed on the screen by wet-on-wet and the stroke is made four more times before the whole is dried, a predetermined thickness can be formed. The obtained phosphorescent layer 8 is pale yellowish green as a whole because the body color of the phosphorescent agent is pale yellowish green. The obtained phosphorescent layer 8 has a thickness of 700 μm.

  The sheet material in which the phosphorescent layer 8 is laminated on the retroreflective layer 2 is left as it is at room temperature for one day, and if there are bubbles in the phosphorescent layer 8, it is appropriately blown and defoamed. By this standing treatment, the phosphorescent agent settles downward in the phosphorescent layer 8, and the back surface of the phosphorescent layer 8 is smoothed by the sedimentation phenomenon. Thereafter, the laminated sheet material is heat-treated at 100 ° C. for 5 minutes while lightly pressed to prevent delamination between the retroreflective layer 2 and the phosphorescent layer 8.

  Next, on the retroreflective layer 2 having the phosphorescent layer 8, the glitter enhancement layer 10 is formed by laminating the glitter enhancement ink over the entire surface in a flat printing press. The glitter enhancement layer 10 is laminated almost flatly on the entire sheet surface.

The components of the glitter enhancement ink for the glitter enhancement layer 10 are as follows.
Crash glass (trade name: UP-712L, manufactured by Union) 2 parts by weight white silicone resin (trade name: NE-R01, manufactured by Nippon Dam) 1 part by weight solvent Appropriate amount This crash glass has an average particle size of 130 μm, Is kneaded into a resin paste.

  Since this glitter enhancement ink has a high viscosity, it is repeatedly printed using a plain screen. For the lamination of the glitter enhancement ink, a 15 mesh screen is formed by three strokes with a squeegee. When the sheet material on which the glitter enhancement layer 10 is laminated is left at room temperature for a while, the surface of the glitter enhancement ink surface is smoothed, and the thickness of the glitter enhancement layer 10 becomes 300 μm. Thereafter, heat treatment is performed at 100 ° C. for 5 minutes while lightly pressing the laminated sheet material to prevent delamination between the retroreflective layer and the phosphorescent layer 8 and the glitter enhancement layer 10.

  On the back surface of the glitter enhancement layer 10, a 100 mesh plain screen on which a light-shielding ink composed of only white silicone resin is placed is further stroked three times to form a light-shielding layer 12 and dried. The thickness of the light shielding layer 12 is 250 μm. The obtained laminated sheet material is dried to obtain a plurality of thin tapes 1 having a width of 2 mm by cutting.

  Since the base material of the narrow-width tape 1 is a silicone resin except for the retroreflective layer 2, the whole is flexible and heat resistant, and is excellent in water resistance and chemical resistance. In the narrow-width tape 1, the phosphorescent layer 8 and the glitter enhancement layer 10 are repeatedly printed on a coarse screen, even after containing a large amount of phosphorescent agent or crush glass having a relatively large particle diameter, and after printing, By performing a heat treatment for preventing peeling, the whole having the retroreflective layer 2, the thick luminous layer 8, the bright enhancement layer 10 and the light shielding layer 12 becomes a robust tape.

  As shown in FIG. 4, the narrow-width tape 1 having a width of 2 mm can be formed into a braid 16 knitted and woven with other colored cords 18, 19, and 20. When the braid 16 is used as a bandage for a kimono, it emits light and emits light at night to become a very unique string product. Although not shown in the drawings, the narrow tape 1 having a width of 2 mm can be used alone as a decorative string for a gift, or can be used as a bag string for a drawstring or a zipper slider puller for a rucksack.

  The narrow tape 1 can be used by being enclosed in a transparent tube 22 as shown in FIG. The transparent tube 22 can be attached around the ear pad of the earphone 24 as shown in FIG. 5 (2), and the design effect is great because it emits light clearly and emits light at night. Although not shown in the figure, the transparent tube 22 may be sewn as a piping to the edge of the cloth of clothes or a bag, or may be sewn between stitches of cloth.

  In order to manufacture the narrow tape 1 having the adhesive layer 14, in Example 1, when it was wet immediately after the light shielding layer 12 was applied, a silicone double-sided adhesive tape (trade name: Tape No. 749) was used. , Manufactured by Teraoka Seisakusho Co., Ltd.) so as not to contain air. In this double-sided adhesive tape, a silicone-based adhesive is applied to both sides of a glass cloth.

  Next, the obtained laminated sheet material is passed through a mangle roll, and the entire sheet is uniformly subjected to pressure bonding and further heat treated at 80 ° C. for 20 minutes. The obtained laminated sheet material is cut into a thin tape 1 having a width of 2 mm by cutting after drying. The thickness of the narrow tape 1 is 1600 to 2400 μm including the release film of the adhesive layer 14.

  As shown in FIG. 6 (1), the narrow tape 1 is fitted into an annular groove 28 of the helmet 26 and adhered thereto. The helmet 26 is an injection molded product of polycarbonate resin, and the mold temperature is 80 to 120 ° C. When this mold is formed, as shown in FIG. 6 (2), an annular groove 28 having a rectangular cross section is formed almost all around the periphery of the helmet 26, and the narrow tape 1 is bonded to the annular groove. As a result, light is emitted clearly in the daytime and at night, and the operator can be easily seen, thereby preventing traffic accidents and the like.

  Although not shown in the drawings, in recent years, in-mold microshell manufacturing helmets made by pressure-bonding impact-absorbing foamed polystyrene parts used for bicycles and in-line skates have narrow tape 1 around the vent holes without impairing their design. It is easy to make a helmet that recognizes its presence by retroreflection when it is easy to find a helmet wearer by phosphorescence in the dark, and when it is irradiated with a headlight of a vehicle. . The helmet of the in-mold microshell manufacturing method has a hole-like space in its outer shell as a ventilation hole or intended for weight reduction, and when the narrow tape 1 is provided around the space hole, It is important to stick with good follow-up, no wrinkle, and good appearance without causing peeling, but the present invention is based on the test of attaching the helmet to the same part of the helmet with the commercial tape and the product of the present invention. It was confirmed that the product was excellent in the pasting beauty without generating wrinkles and the like, and was preferable without causing peeling.

  In order to conduct a test for attaching the helmet to the in-mold microshell manufacturing method, the 2 mm width and 3 mm width narrow tapes obtained in Example 2 and commercially available tapes having different adhesive strength, width, and thickness are prepared. These tapes were bonded so as to follow the outer shell hole around the right frontal lobe of a helmet manufactured by an in-mold microshell manufacturing method (trade name: KABUTO, manufactured by OGK).

  The commercially available tape used for the verification test is a green heat-resistant tape (manufactured by Teraoka Seisakusho) with a width of 8 mm and a thickness of 0.078 mm as an example of a thin film tape, and a thickness as an example of a low-intensity phosphorescent tape without retroreflective performance. A 0.49 mm high-performance phosphorescent tape N (made by Nitoms) is cut into a width of 2 mm. As an example of a tape having a thickness and cushioning properties, a 4.02 mm thick door-tight tape (made by Cemedine) is cut into a width of 2 mm. Use. On the other hand, the 2 mm width and 3 mm width narrow tapes obtained in Example 2 both have a thickness of 1.385 mm. These tapes were affixed to the same part of the helmet, and it was confirmed whether finishing aesthetics and peeling occurred.

  In this verification test, when pasted around the outer shell hole of the in-mold microshell manufacturing helmet, as shown in Table 1 below, the narrow tape obtained in Example 2 is wrinkled or the like if it is less than 3 mm wide. Since it can be applied aesthetically without generation and no peeling occurs, a favorable result was obtained.

  In order to manufacture the narrow tape 30 shown in FIG. 2, as the retroreflective layer 2, a temporary layer is applied on the release film, and the glass beads 3 are arranged in a single layer on the temporary layer. A sheet on which the reflective resin layer 5 is formed is used. On the sheet-like retroreflective layer 2, the same phosphorescent ink as in Example 1 is laminated, and the phosphorescent layer 8 is laminated.

  Since phosphorescent ink has a high viscosity in a flat printing press, it is repeatedly printed using a plain screen. For the lamination of phosphorescent ink, first, a 15 mesh screen is stroked four times with a squeegee to form a predetermined thickness. The obtained phosphorescent layer 8 is pale yellowish green as a whole because the body color of the phosphorescent agent is pale yellowish green. The thickness of the obtained phosphorescent layer 8 is 650 μm.

  The sheet material in which the phosphorescent layer 8 is laminated on the retroreflective layer 2 is left as it is at room temperature for one day, and if there are bubbles in the phosphorescent layer 8, it is appropriately blown and defoamed. By this standing treatment, the phosphorescent agent settles downward in the phosphorescent layer 8, and the back surface of the phosphorescent layer 8 is smoothed by the sedimentation phenomenon. Thereafter, the laminated sheet material is heat-treated at 100 ° C. for 5 minutes while lightly pressed to prevent delamination between the retroreflective layer 2 and the phosphorescent layer 8.

  Next, on the retroreflective layer 2 having the phosphorescent layer 8, the glitter enhancement ink 10 is formed on the entire surface by laminating the glitter enhancement ink in the same manner as in the first embodiment. The glitter enhancement layer 10 is laminated flat on the entire surface of the sheet and has a thickness of 250 μm.

  Since this glitter enhancement ink has a high viscosity, it is repeatedly printed using a plain screen. For the lamination of the glitter enhancement ink, a 15 mesh screen is formed by three strokes with a squeegee. When the sheet material on which the glitter enhancement layer 10 is laminated is left at room temperature for a while, the surface of the glitter enhancement ink surface is smoothed. Thereafter, heat treatment is performed at 100 ° C. for 5 minutes while lightly pressing the laminated sheet material to prevent delamination between the retroreflective layer and the phosphorescent layer 8 and the glitter enhancement layer 10.

  On the back surface of the glitter enhancement layer 10, a 100 mesh plain screen on which a light-shielding ink composed of only white silicone resin is placed is further stroked three times to form a light-shielding layer 12 and dried. The thickness of the light shielding layer 12 is 200 μm. The obtained laminated sheet material obtains a thin tape 30 having a width of 5 mm by cutting after drying.

  Since the base material of the narrow tape 30 is a silicone resin except for the retroreflective layer 2, the whole is flexible and heat resistant, and is excellent in water resistance and chemical resistance. In the narrow-width tape 30, the phosphorescent layer 8 and the glitter enhancement layer 10 are repeatedly printed on a coarse screen, even after containing a large amount of phosphorescent agent or crush glass having a relatively large particle diameter, and after printing, By performing a heat treatment for preventing peeling, the whole having the retroreflective layer 2, the phosphorescent layer 8, the bright enhancement layer 10, and the light shielding layer 12 becomes a robust tape.

  As shown in FIG. 7, the narrow tape 30 may be appropriately sewn to the main part of the bag 32. When the narrow tape 30 is sewn on the bag 32, it emits light by light irradiation in the daytime and further emits light for a long time at night, and the bag user can be easily visually recognized, thereby preventing a collision accident and the like.

  In Example 4, in order to manufacture the narrow tape 30 having the adhesive layer 14, when it was wet immediately after the light shielding layer 12 was applied, a silicone-based double-sided adhesive tape (trade name: Tape No. 749) was used. , Manufactured by Teraoka Seisakusho Co., Ltd.) so as not to contain air. Next, the obtained laminated sheet material is passed through a mangle roll, and the entire sheet is uniformly applied with a load, followed by heat treatment at 80 ° C. for 20 minutes. The obtained laminated sheet material is cut into a thin tape 30 having a width of 5 mm by cutting after drying. The thickness of the narrow tape 30 is about 2000 μm including the release film of the adhesive layer 14.

  As shown in FIG. 8, the narrow tape 30 may be adhered to the upper pipe 35, the front mudguard body 36, the rear mudguard body 37, etc. of the bicycle 34, and may be further adhered to other members. When the narrow tape 30 is bonded to the bicycle 34, light is emitted by light irradiation in the daytime, and further, light is emitted for a long time at night, and the driver can be easily visually recognized, thereby preventing traffic accidents and the like.

  The laminated sheet material obtained in Example 5 was cut to produce a narrow tape having a width of 2 mm, and the narrow tape having the adhesive layer 14 was also bonded to the handle 38 and the bell 39 of the bicycle 34 as shown in FIG. To do. When a 2mm width narrow tape is attached to the handle 38 and the bell 39 of the bicycle 34, it will not be peeled off for a long time, it will emit light for a long time in the daytime and at night, and it will prevent traffic accidents by easily seeing the driver. it can. In Table 2 below, aesthetics and adhesion peeling when a narrow tape having a predetermined width was bonded to the handle 38 and the bell 39 were confirmed.

  In order to manufacture the narrow tape 40 shown in FIG. 3, an encapsulated retroreflective sheet (manufactured by Unitika Sparklite) defined by JIS Z9117 is used as the retroreflective layer 2. On the binder layer 6 of the sheet-like retroreflective layer 2, the phosphorescent layer 8, the glitter enhancement layer 10, and the light shielding layer 12 are sequentially laminated in the same manner as in the first embodiment. The obtained laminated sheet material is dried to obtain a plurality of narrow tapes 40 having a width of 2 mm by cutting.

  In the narrow tape 40, the transparent protective layer 7 is formed on the surface of the retroreflective layer 2. The transparent protective layer 7 may be improved in heat resistance and water resistance by adding various additives before molding, and the transparent protective layer 7 is made of urethane resin. Since the thin tape 40 is covered with a transparent protective layer 7 having a transparent and smooth surface, it is easy to remove dirt, and almost no reduction in reflection performance due to rain or the like is observed.

  Although not shown, the narrow tape 40 may be appropriately bonded to athletic shoes or running wear. When the narrow tape 40 is bonded to athletic shoes or running wear, it emits light by daytime light irradiation and emits clear light for a long time at night, making it easy to see the wearer, preventing traffic accidents etc. it can.

DESCRIPTION OF SYMBOLS 1 Narrow tape 2 Retroreflective layer 3 Transparent ball 5 Reflective resin layer 6 Binder layer 8 Phosphorescent layer 10 Brightness enhancement layer 12 Light shielding layer 14 Adhesive layer

Claims (5)

  A retro-reflective layer comprising a uniform single-layer transparent small sphere arranged on the surface, which is a flexible thin-width tape cut into a thin string shape and capable of emitting light at all times at night, and the retro-reflective layer A transparent resin phosphorescent layer formed on the back side, a white resin glitter enhancement layer containing crash glass, and a backup layer made of a white resin that reflects light that has passed through the glitter enhancement layer, The phosphorescent layer has a thickness of 600 to 1500 μm, and the light emitted from the phosphorescent layer is a high-intensity narrow-width tape that emits light more vividly by passing through the lower glitter enhancement layer.   The narrow-width tape according to claim 1, wherein the finished product can be retrofitted by adhering a double-sided tape to the back side of the backup layer.   The narrow tape according to claim 1, wherein a transparent or translucent reflective layer is provided under the glass beads in the retroreflective layer.   The phosphorescent layer has a thickness of 600 to 1500 μm, the phosphorescent agent is contained in an amount equal to or more than twice the transparent base resin, and the resin kneaded with the phosphorescent agent is a transparent silicone resin. The narrow tape according to claim 1.   The thin tape according to claim 1, wherein the glitter enhancement layer is made of a white silicone resin containing a large amount of crush glass having an average particle diameter of 10 to 250 µm.

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