High-color-fastness lettering film

Abstract

The utility model discloses a high color fastness lettering film, which belongs to the technical field of lettering films and comprises a film body, the film body sequentially comprises a debonding layer, a substrate layer and a printing layer, a plurality of color holes are formed in the printing layer at intervals, two ends of the color holes are respectively covered with an outer hot melting layer and an inner hot melting layer, and the inner hot melting layer is arranged between the printing layer and the substrate layer. The temperature of the hot-pressed film body is higher than the melting point of the inner hot-melting layer, the temperature of the hot-pressed film body is lower than the melting point of the outer hot-melting layer, and the inner hot-melting layer and the printing layer are melted and mixed to form a plurality of color fixing layers arranged in the color retaining holes. According to the high-color-fastness lettering film disclosed by the utility model, the pigment which is respectively arranged in the printing layer and the color fixing layer in the film body weakens the influence of the external environment on the overall color of the film body, and meanwhile, the outer hot melting layer is attached to the interior of the color reserving hole through hot melting, so that the surface of the color fixing layer is further covered with a hot melting layer with a good color fastness effect.

Description

Technical Field

[0001] The utility model relates to the technical field of lettering films, in particular to a lettering film with high color fastness. Background Art

[0002] Engraving film is a thermal transfer film that can be cut into regular patterns such as letters by a engraving machine.

[0003] The existing technology of lettering film generally includes a release layer, a base layer and a printing layer. In order to make the color of the printing layer last longer, some lettering films are also covered with a hot-melt layer outside the printing layer.

[0004] After the object is covered with the lettering film by heat pressing, the hot melt layer on the surface of the lettering film expands and the printed layer tends to split. After being exposed to the external environment for a long time, the hot melt layer gradually becomes fluffy, and the printed layer gradually cracks, causing the lettering film to fade, affecting the aesthetics of the lettering film.

[0005] In view of the above problems, a technical solution of a lettering film with better color fastness is proposed. Utility Model Content

[0006] The utility model aims to solve the problems in the prior art and provides a lettering film with high color fastness.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a high color fastness lettering film, including a film body, the film body includes a release layer, a base layer and a printing layer in sequence, the printing layer is spaced apart to form a plurality of color retention holes, the two ends of the plurality of color retention holes are respectively covered with an outer hot melt layer and an inner hot melt layer, the inner hot melt layer is arranged between the printing layer and the base layer, the temperature of hot pressing the film body is greater than the melting point of the inner hot melt layer, the temperature of hot pressing the film body is lower than the melting point of the outer hot melt layer, the inner hot melt layer and the printing layer are melted and mixed to form a plurality of color fixing layers arranged in the color retention holes.

[0008] The utility model is further configured as follows: the cross section of the color retention hole is a truncated cone structure, and the lower bottom of the truncated cone structure is arranged on a side close to the outer hot-melt layer.

[0009] The utility model is further configured as follows: the printing layer is formed by screen printing, and the mesh number of the screen is greater than or equal to 300 meshes.

[0010] The utility model is further configured as follows: the inner hot-melt layer is cast into a film-like structure by polyethylene material, and the outer hot-melt layer is cast into a film-like structure by polypropylene material.

[0011] The utility model is further configured as follows: the base layer is made of polyester material.

[0012] The utility model is further configured as follows: the release layer is made of polyurethane material.

[0013] In summary, the utility model has the following beneficial effects: the pigments placed in the printing layer and the color fixing layer in the film body reduce the influence of the external environment on the overall color of the film body, and at the same time, the outer hot melt layer is bonded to the color retention hole through hot melting, so that the surface of the color fixing layer is further covered with a hot melt layer with good color fastness effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The structure of the utility model is shown in FIG. Figure 1 ;

[0015] Figure 2 The structure of the utility model is shown in FIG. Figure 2 .

[0016] In the figure: 1, film body; 2, release layer; 3, base layer; 4, printing layer; 5, inner hot melt layer; 6, outer hot melt layer; 7, color retention hole; 8, color fixing layer. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. Obviously, the embodiments described are only some embodiments of the present invention, rather than all embodiments.

[0018] High color fastness lettering film, such as Figure 1 as well as Figure 2As shown, it includes a film body 1, which includes a release layer 2, a base layer 3 and a printing layer 4 in sequence. The printing layer 4 is formed with a plurality of color retention holes 7 at intervals. The two ends of the plurality of color retention holes 7 are respectively covered with an outer hot melt layer 6 and an inner hot melt layer 5. The inner hot melt layer 5 is arranged between the printing layer 4 and the base layer 3. The temperature of the hot pressed film body 1 is greater than the melting point of the inner hot melt layer 5, and the temperature of the hot pressed film body 1 is lower than the melting point of the outer hot melt layer 6. In this specific embodiment, the release layer 2 is made of polyurethane material, the base layer 3 is made of polyester material, the inner hot melt layer 5 is cast into a film structure by polyethylene material, and the outer hot melt layer 6 is cast into a film structure by polypropylene material. The printing layer 4 is formed by screen printing, and the mesh number of the screen is 400 meshes. The larger the mesh number of the screen, the smaller the cross section of the color retention hole 7 and the greater the density. The printing layer 4 is coated with thermal transfer ink. Through screen printing, the cross section of the color retention hole 7 is a truncated cone structure, wherein the bottom of the truncated cone structure is arranged on the side close to the outer hot melt layer 6.

[0019] The film body 1 is hot-pressed onto an object by a hot press, and the inner hot-melt layer 5 and the printed layer 4 are melted and mixed to form a plurality of color-fixing layers 8 arranged in the color-retaining holes 7. After the film body 1 is cooled, part of the pigment of the printed layer 4 is mixed with the material of the inner hot-melt layer 5. Under the premise of protection by the outer hot-melt layer 6, the pigments placed in the printed layer 4 and the color-fixing layer 8 in the film body 1 reduce the influence of the external environment on the overall color of the film body 1. At the same time, the outer hot-melt layer 6 is bonded toward the color-retaining holes 7 by hot-melting, so that the surface of the color-fixing layer 8 is further covered with a layer of hot-melt layer with good color fastness effect.

[0020] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0021] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A high color fastness lettering film, comprising a film body, wherein the film body comprises a release layer, a base layer and a printing layer in sequence, characterized in that: The printing layer is spaced apart to form a plurality of color retention holes, and both ends of the plurality of color retention holes are respectively covered with an outer hot-melt layer and an inner hot-melt layer, the inner hot-melt layer is arranged between the printing layer and the base layer, the temperature of hot-pressing the film body is greater than the melting point of the inner hot-melt layer, and the temperature of hot-pressing the film body is lower than the melting point of the outer hot-melt layer, and the inner hot-melt layer and the printing layer are melted and mixed to form a plurality of color-fixing layers arranged in the color retention holes.

2. The high color fastness lettering film according to claim 1, characterized in that: The cross section of the color retention hole is a truncated cone structure, and the lower bottom of the truncated cone structure is arranged on a side close to the outer hot melt layer.

3. The high color fastness lettering film according to claim 2, characterized in that: The printing layer is formed by screen printing, and the mesh number of the screen is greater than or equal to 300 meshes.

4. The high color fastness lettering film according to claim 1, characterized in that: The inner hot-melt layer is cast into a film-like structure by polyethylene material, and the outer hot-melt layer is cast into a film-like structure by polypropylene material.

5. The high color fastness lettering film according to claim 1, characterized in that: The base layer is made of polyester material.

6. The high color fastness lettering film according to claim 1, characterized in that: The release layer is made of polyurethane material.

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