JPH10305696A - Recursive transfer mark and recursive mark transferred thereby - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recursive transfer mark for reflecting an incident light from a wide angle range with high luminance while obtaining the degree of freedoms of design by printing, by providing a pressure sensitive adhesive layer in a laminated structure, uniformly aligning beads having recursiveness in a single layer state, cueing the beads, and securely adhering them to a rubber molding with satisfactory followability. SOLUTION: The recursive transfer mark (m) comprises a recursive part 10 for reflecting a light. In this case, the part 10 has an ink 12 having rubber component, a rubber-based binder 13 having light transmission properties, beads 14 having recursiveness, a rubber pressure sensitive adhesive 15 having heat resistance and light transmission properties, and a release sheet 15 having expandible and contractible and heat resistance and no vulcanizable property sequentially laminated. The adhesive has heat resistance and is not vulcanizable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recursive transfer which can be transferred to a rubber molded product, has excellent durability and freedom of design, shines with high luminance, and reflects incident light from a wide angle range. The present invention relates to a mark and a recursive mark transferred to a rubber molded article by the mark.

[0002]

2. Description of the Related Art Conventionally, as a method of providing a shiny portion on a rubber molded product such as a tire to bring out a design effect, a reflection sheet having glass beads having recursive properties adhered to the surface is bonded to the surface of the rubber molded product. Was to be done.
In this method, a reflective sheet is attached to a rubber semi-molded product before vulcanization with a rubber-based adhesive, and then the whole is vulcanized so that the reflective sheet is adhered to the rubber molded product.

[0003]

However, in this method, although the rubber-based pressure-sensitive adhesive adheres to the rubber semi-molded product by vulcanization, the reflection sheet itself is made of, for example, a glass sheet or a resin sheet with glass beads using a binder. Therefore, the boundary between the binder and the glass beads does not become compatible with the rubber molded product and does not adhere sufficiently. Further, since the reflection sheet and the rubber molded product are different, it is difficult to follow the expansion and contraction of the rubber. Therefore, the reflection sheet and the rubber molded product may be separated from each other, and there is a problem in durability. In addition, when designing a glowing portion in the form of characters, figures, symbols, or the like, it is necessary to punch the reflection sheet into a desired shape, which is very laborious and expensive.

As a recursive transfer mark, for example, Japanese Utility Model Publication No. 2-34440, a stretchable, heat-resistant film layer is provided with a thermoplastic release layer and a printing ink layer containing a rubber component. Are disclosed. This recursive transfer mark is applied to the molded rubber semi-molded product before vulcanization, vulcanization molding is performed with the film layer attached, and then the film is peeled off. The gloss of the ink is transferred to the ink layer and gloss is imparted to the ink, and the film layer follows the deformation of the rubber molded product during vulcanization, so that it is possible to prevent the ink layer from wrinkling and displacing. Things.

[0005] In view of this, if glass beads are mixed into the release layer to form a recursive transfer mark and this is adhered to a rubber molded product, the mark can be adhered to the rubber molded product with good followability, and furthermore, printing is performed. It seems that you can gain design freedom. However, when glass beads are actually mixed into the release layer and laminated on the film layer, the glass beads do not line up neatly in the release layer, the depth at which the glass beads are fixed is not constant, and the glass beads Often overlap. For this reason, there is a problem that not so high luminance can be obtained from the recursive transfer mark.

The present inventors have conducted various experiments and studies to solve this problem, and as a result, have completed the present invention. The object of the present invention is to arrange beads having recursiveness uniformly in a single layer state by providing a layer of an adhesive in a laminated structure, so that these beads are caught by vulcanization. , A recursive transfer mark that can be adhered to rubber molded products reliably and with good followability, and that can reflect incident light from a wide angle range with high brightness while obtaining design freedom by printing ,
And to provide a transferred recursive mark.

A further object of the present invention is to provide a recursive transfer mark which can be reflected with higher brightness by exfoliating the above-mentioned adhesive layer after vulcanization and exposing the beads neatly, and a recursive transfer mark transferred thereby. Gender mark.

[0008]

According to a first aspect of the present invention, there is provided a recursive transfer mark having a recursive portion for reflecting light, wherein the recursive portion is formed of a rubber. Component-containing ink, rubber-based translucent binder, recursive beads, heat-resistant and translucent rubber-based adhesive, stretchable and heat-resistant and vulcanized And a release sheet which is not formed. The rubber mentioned here includes a rubber mainly composed of natural rubber or synthetic rubber, and an elastomer. The beads include glass beads and resin beads.

[0009] The recursive transfer mark is applied to the rubber semi-molded product before vulcanization on the ink side, and then the whole is vulcanized, whereby the ink, binder and adhesive are vulcanized. Thus, a recursive mark transferred to the rubber molded product is formed. In this case, the beads are sandwiched between the pressure-sensitive adhesive layer and the binder layer, and these are adhered to the rubber molded article by the ink layer reliably and with good followability. Also, by attaching the beads on the adhesive in the manufacturing stage, the beads are uniformly arranged in a single layer state. Then, since the pressure-sensitive adhesive laminated thereon is thinly extended by the compressive force at the time of vulcanization, the beads come out of the head. Furthermore, since the semi-molded rubber product before vulcanization is soft,
The beads dig and the ink layer is correspondingly recessed along the curved surface of the beads. Therefore, the beads exhibit excellent regression to light, exhibit high brightness, and light incident on the beads in a wide angle range is reflected at the boundary with the ink layer. Further, the ink, the binder, the beads, and the adhesive can be formed into a free planar shape at the time of lamination by using a method such as printing, so that the degree of freedom in design can be obtained. Moreover, since the pressure-sensitive adhesive layer covering the beads exerts a buffering action, the beads are protected from external force.

According to the second aspect of the present invention, there is provided the recursive transfer mark according to the first aspect.
The described recursive transfer mark is characterized in that a heat-resistant and non-vulcanized pressure-sensitive adhesive is laminated instead of the heat-resistant and light-transmitting rubber-based pressure-sensitive adhesive.

[0011] This recursive transfer mark is applied to the rubber semi-molded product before vulcanization on the ink side, and then the whole is vulcanized, whereby the ink and binder are vulcanized. A recursive mark is transferred to the molded article. In this case, the beads adhere to the rubber molded product reliably and with good followability by the binder layer and the ink layer. Also, by attaching the beads on the adhesive in the manufacturing stage, the beads are uniformly arranged in a single layer state. Then, when the release sheet is peeled off, the adhesive is peeled off from the beads on the release sheet, so that the beads are clearly exposed. In addition, since the rubber semi-molded product before vulcanization is soft, the beads penetrate, and accordingly, the ink layer is concavely formed along the curved surface of the beads. Therefore, it exhibits excellent regression to light, exhibits extremely high luminance, and reflects light incident on the beads in a wide angle range at the boundary with the ink layer.
Further, the ink, the binder, the beads, and the adhesive can be formed into a free planar shape at the time of lamination by using a method such as printing, so that the degree of freedom in design can be obtained.

According to the third aspect of the present invention, there is provided the recursive transfer mark according to the first aspect.
Or a rubber adhesive is further laminated on the ink layer of the recursive transfer mark described in 2.

In this case, the adhesive improves the adhesive strength of the recursive transfer mark to the rubber molded product. In this case, the recursive transfer mark is stuck to the rubber semi-molded product before vulcanization with an adhesive.

According to the fourth aspect of the present invention, there is provided the recursive transfer mark according to the first aspect.
(3) The ink layer of the recursive transfer mark according to any one of (1) to (3), wherein a silver-based ink is included.

In this recursive transfer mark, the brightness of the beads is further improved because the silver-based ink layer reflects light more strongly than the inks of other colors.

The recursive mark according to claim 5 is a recursive mark transferred to a rubber molded product, wherein the recursive mark is transferred to a semi-molded rubber product before vulcanization. It is characterized in that the mark is attached on the surface of the ink or the adhesive, then the whole is vulcanized, and then the release sheet is peeled off.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the recursive transfer mark according to the present invention will be described, but the present invention is not limited by these embodiments. FIG. 1 shows a recursive transfer mark m according to the first embodiment. The recursive transfer mark m becomes a recursive mark M by being transferred to a predetermined portion of the rubber molded product G such as a sidewall of a tire.

The recursive transfer mark m of the first embodiment has a recursive portion 10 for reflecting light. The recursive portion 10 includes a rubber-based adhesive 11, an ink 12 having a rubber component, and a rubber-based translucent binder 13.
And a recursive bead 14, a heat-resistant and translucent rubber-based pressure-sensitive adhesive 15, and a release sheet 16 that has elasticity and heat resistance and is not vulcanized. I have.

The rubber-based adhesive 11 is preferably formed so as to surround the periphery of the layer of the ink 12 and the layer of the binder 13 in that the adhesion of the recursive mark M to the rubber molded product G is improved. In addition, the glass beads 14 may be resin beads. In short, any glass beads may be used as long as they exhibit light regression, that is, a function of reflecting light. The adhesive 15 preferably has elasticity. The release sheet 16 is exemplified by, for example, a resin sheet.

When manufacturing the above-described recursive transfer mark m,
Adhesive 11, ink 12, binder 13, and adhesive 1
5 is laminated by a known printing technique such as screen printing. Further, the glass beads 14 are arranged uniformly. In that case, the ink 12, the binder 13, and the glass beads 14 are laminated so as to represent desired characters, figures, symbols, and the like. As a result, the recursive transfer mark m has a recursive portion 10 and a non-recursive portion 20 on which the ink 12 or the like is laminated without the glass beads 14. Of course, it may be formed solid without forming characters or the like. In that case, the recursive portion 10 is formed on the entire surface of the recursive transfer mark m. When shipping the recursive transfer mark m, it is desirable to put a release paper (not shown) on the rubber adhesive 11.

When the recursive transfer mark m of the above embodiment is used, as shown in FIG.
Is adhered to the rubber semi-molded product g before vulcanization on the surface of the rubber adhesive 11, and then the whole is vulcanized, so that the rubber adhesive 11,
When the ink 12, the binder 13, and the adhesive 15 are vulcanized, and then the peeling sheet 16 is peeled off, a recursive mark M transferred to the rubber molded product G is formed as shown in FIG. In that case, the glass beads 14 are sandwiched between the layer of the adhesive 15 and the layer of the binder 13, and these are adhered to the rubber molded product G by the layer of the ink 12 reliably and with good followability. Therefore, the recursive mark M is hard to be peeled off even when the rubber molded product G expands and contracts, and shows excellent durability. Also,
By attaching the glass beads 14 on the adhesive 15 at the manufacturing stage, the glass beads 14 are uniformly arranged in a single layer state.
And since the adhesive 15 laminated thereon is thinly extended by the compressive force at the time of vulcanization, as shown in FIGS. 2 and 3,
The glass beads 14 protrude. Further, since the rubber semi-molded product g before vulcanization is soft, as shown in FIGS. 2 and 3,
The glass beads 14 bite and the ink 12
Is formed along the curved surface of the glass beads 14. Therefore, it exhibits excellent regression to light, exhibits high luminance, and reflects light incident on the glass beads 14 in a wide angle range at the boundary with the layer of the ink 12. Further, the adhesive 11, the ink 12, the binder 13, and the adhesive 15 can be formed in a free plane shape at the time of lamination by using a technique such as printing, so that a degree of freedom in design can be obtained. Further, a process such as punching is not required at all, so that workability can be improved and cost can be reduced. Moreover, the glass beads 14 are covered with the adhesive 15,
Since the layer of the adhesive 15 covering the glass beads 14 exerts a buffering action, the glass beads 14 are protected from external force.

FIGS. 4 to 6 show a recursive transfer mark m according to the second embodiment. The recursive transfer mark m of the second embodiment has the same structure as that of the first embodiment. However, only the composition of the adhesive is different, so this is shown as an adhesive 15 ′ and is the same as that of the first embodiment. The other elements are denoted by the same reference numerals, and detailed description thereof is omitted. Further, the respective signs of the recursive transfer marks m and M before and after vulcanization, the rubber semi-molded product g, and the rubber molded product G follow as they are.

That is, as shown in FIG. 4, the recursive portion 10 of the recursive transfer mark m according to the second embodiment includes a rubber-based adhesive 11, an ink 12 having a rubber component, and a rubber-based light-transmitting material. Binder 13 having resilience, beads 14 having recursive properties, heat-resistant and non-vulcanized pressure-sensitive adhesive 1
5 'and a release sheet 16 having elasticity and heat resistance and not being vulcanized are sequentially laminated. The pressure-sensitive adhesive 15 'does not necessarily need to have a light-transmitting property.

Points to note regarding the rubber adhesive 11, the ink 12, the binder 13, the glass beads 14, and the release sheet 16 are the same as those in the first embodiment. It is preferable that the pressure-sensitive adhesive 15 ′ has no rubber component, and has elasticity and is easily adapted to the release sheet 16. This is because, as described later, when the release sheet 16 is peeled off after vulcanization, the release sheet 16 follows the release sheet 16 so that it can be satisfactorily peeled off from the glass beads 14.

The method of manufacturing the above-described recursive transfer mark m and points to be noted at that time are the same as those of the first embodiment.

When the recursive transfer mark m of the above embodiment is used, as shown in FIG.
Is adhered to the rubber semi-molded product g before vulcanization on the surface of the rubber adhesive 11, and then the whole is vulcanized, so that the rubber adhesive 11,
When the ink 12 and the binder 13 are vulcanized and then the peeling sheet 16 is peeled off, a recursive mark M transferred to the rubber molded product G is formed as shown in FIG. In that case,
Glass beads 14 are a layer of binder 13 and ink 12
With this layer, it adheres to the rubber molded product G reliably and with good followability. Therefore, the recursive mark M is hard to be peeled off even when the rubber molded product G expands and contracts, and shows excellent durability.
Further, by attaching the glass beads 14 on the adhesive 15 in the manufacturing stage, the glass beads 14 are uniformly arranged in a single layer state. Moreover, when the release sheet 16 is subsequently peeled off, the adhesive 15 'is peeled off from the glass beads 14 with respect to the release sheet 16, so that the glass beads 14 are clearly exposed as shown in FIGS. Further, since the rubber semi-molded product g before vulcanization is soft, as shown in FIGS. 5 and 6, the glass beads 14 bite, and accordingly, the layer of the ink 12 is concaved along the curved surface of the glass beads 14. Is done. Therefore, it exhibits excellent regression to light, exhibits high luminance, and reflects light incident on the glass beads 14 in a wide angle range at a boundary with the ink 12 layer. Further, a rubber-based adhesive 11, an ink 12, a binder 13,
Both the glass beads 14 and the adhesive 15 can be formed into a free planar shape at the time of lamination by using a technique such as printing, so that a degree of freedom in design can be obtained. Further, a process such as punching is not required at all, so that workability can be improved and cost can be reduced.

In any of the above embodiments, when a silver-based ink is included in the ink 12 layer, the silver-based ink layer reflects light more strongly than the other color inks.
The brightness of the glass beads 14 is further improved.

In any of the above embodiments,
The rubber-based adhesive 11 was further laminated on the ink layer 12. By doing so, the adhesive force of the recursive transfer mark M to the rubber molded product G is improved by the adhesive 11, but it may not be necessary to laminate the adhesive 11 depending on the composition of the rubber molded product G. Therefore, in the present invention, whether to use the adhesive 11 is optional. When an adhesive is not used, the recursive transfer mark is attached to the rubber semi-molded product before vulcanization on the surface of the ink layer.

[0029]

EXAMPLE Next, an example belonging to the second embodiment will be described, but the present invention is not limited by this example. In this embodiment, the rubber adhesive 11 is N
A mixture of R, SBR, and the like with additives such as sulfur and zinc white according to the composition of the rubber product G on the other side was used. The ink 12 was prepared by kneading a silver pigment into synthetic rubber, and used to print characters and pictures. The glass beads 14 were buried in an adhesive 15 ′ in a volume of at least half. This recursive transfer mark m was affixed to the rubber semi-molded product g after molding and before vulcanization, and was heated by a mold at 170 ° C. for 3 to 15 minutes to be vulcanized. The resulting recursive transfer mark M was adhered to the rubber molded product G reliably and with good followability, and excellent durability was obtained. In addition, it has high luminance and reflects incident light from a wide angle range. Specifically, when a test was performed based on the reflection performance test defined in JIS Z 9117, a value comparable to the first class was obtained.

In each of the above embodiments, the recursive transfer mark m adhered to the sidewall of the tire is exemplified. However, the adhesion destination of the recursive transfer mark of the present invention is not limited to the tire, and natural rubber or Any rubber may be used as long as it is a rubber mainly made of synthetic rubber or a rubber molded article formed of an elastomer.

[0031]

As described above, the recursive transfer mark of claim 1 can adhere to a rubber molded article reliably and with good followability, exhibit excellent durability, and effectively protect beads from external force. In addition to this, it is possible to obtain a degree of freedom in design while improving workability and reducing costs, and it is possible to reflect incident light from a wide range of angles with high brightness. Therefore, it is suitable for transferring to a rubber molded article such as a tire or a security article for a highway.

According to the second aspect of the present invention, the retrotransfer mark can be reflected at a higher luminance than the retrotransfer mark of the first aspect.

According to the third aspect of the invention, the recursive transfer mark can be firmly adhered to the rubber molded product by the adhesive.

According to the fourth aspect, the brightness of the beads can be further improved by reflecting light in the silver-based ink layer.

According to the fifth aspect of the present invention, the recursive mark adheres to the rubber molded article reliably and with good followability, can exhibit excellent durability, is excellent in design, has high brightness, and can be used from a wide angle range. Can be reflected with respect to the incident light. According to the first aspect, the beads can be effectively protected from external force.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing a state in which a recursive transfer mark according to a first embodiment of the present invention is adhered to a rubber semi-molded product before vulcanization.

FIG. 2 is a schematic cross-sectional view showing a state in which a release sheet is peeled off after the recursive transfer mark of the first embodiment is vulcanized together with a rubber semi-molded product.

FIG. 3 is a schematic sectional view showing an enlarged view of FIG. 2;

FIG. 4 is a diagram corresponding to FIG. 1 according to a second embodiment.

FIG. 5 is a diagram corresponding to FIG. 2 according to a second embodiment.

FIG. 6 is a diagram corresponding to FIG. 3 relating to the second embodiment.

[Explanation of symbols]

m Recursive transfer mark M Recursive mark g Rubber semi-molded product G Rubber molded product 10 Recursive part 11 Adhesive 12 Ink 13 Binder 14 Glass bead (bead) 15 Adhesive (a rubber-based material having heat resistance and translucency) 15 'adhesive (heat resistant and not vulcanized) 16 release sheet 20 non-recursive part

Claims (5)

[Claims] 1. A recursive transfer mark having a recursive portion for reflecting light, wherein the recursive portion has an ink having a rubber component, a rubber-based translucent binder, and a recursive portion. Recursive transfer characterized by being formed by sequentially laminating beads, a rubber-based pressure-sensitive adhesive having heat resistance and translucency, and a release sheet having elasticity and heat resistance and not being vulcanized. mark. 2. The recursive transfer mark according to claim 1, wherein a heat-resistant and non-vulcanized pressure-sensitive adhesive is laminated in place of the heat-resistant and light-transmitting rubber-based pressure-sensitive adhesive. A recursive transfer mark characterized by the following. 3. The recursive transfer mark according to claim 1, wherein a rubber adhesive is further laminated on the ink layer. 4. The recursive transfer mark according to claim 1, wherein the ink layer contains a silver-based ink. 5. A recursive mark transferred to a rubber molded article, wherein the recursive transfer mark according to claim 1 is applied to a semi-molded rubber article before vulcanization by using an ink or an adhesive. A recursive mark formed by sticking on the surface, then vulcanizing the whole, and then peeling off the release sheet.