TPU sticker with three-dimensional embossment effect

Abstract

The utility model relates to a cultural and invasive sticker, in particular to a TPU (thermoplastic polyurethane) sticker with a three-dimensional embossment effect, which comprises a printing coating, a display layer, a surface material layer, a bonding layer and a release layer which are sequentially overlapped together from top to bottom, and is different from the prior art that the surface material layer is made of thermoplastic polyurethane elastomer film materials and is 80 microns thick; the printing coating further comprises a UV white ink base layer, a UV white ink local layer, a UV color ink layer and a UV gloss oil layer which are sequentially stacked from bottom to top. Compared with the prior art, the TPU film material is selected, the texture is soft, the problem of edge warping when the paster is pasted on a curved surface can be effectively solved, and the use scene of the paster is wider.

Description

Technical Field

[0001] This utility model relates to creative stickers, and more particularly to a TPU sticker with a three-dimensional embossed effect. Background Technology

[0002] In the current booming wave of the cultural and creative industries, creative stickers, as a type of creative product that cleverly integrates cultural elements and practical functions, are deeply favored by consumers and occupy a significant position in the market. Their applications are extremely wide-ranging, with decorative and beautifying functions being particularly prominent. When people carefully affix these creative stickers to the surfaces of various items such as notebooks, journals, phone cases, water cups, and even walls, they instantly endow these items with unique personality traits, creating a rich artistic atmosphere and greatly enhancing the aesthetics and fun of the items, satisfying people's pursuit of a personalized lifestyle.

[0003] Furthermore, creative stickers offer ample room for creative DIY. Consumers can fully unleash their imaginations, freely combining and splicing stickers of different styles and themes to construct unique scenes such as dreamlike fairy tale worlds and vibrant gardens, unleashing their creative potential and enjoying the fun and sense of accomplishment that DIY brings. At the same time, creative stickers also carry deep emotions and precious memories, often used to commemorate special events, important holidays, or memorable figures. In conveying blessings and sentiments, they become an important vehicle for emotional expression, bringing people closer together.

[0004] However, current sticker products on the market have many unresolved issues regarding materials and 3D effects. In terms of surface materials, they mainly consist of various paper materials and PET, OPP, and PVC films. While paper materials offer a certain degree of comfort and texture, they have significant limitations, such as poor water resistance, making them easily damaged by water and prone to tearing during daily use, greatly restricting their application scenarios. Film materials, on the other hand, often suffer from excessive plasticizer levels, posing a potential threat to users' health. They are also not heat-resistant, easily shrinking and deforming, affecting the sticker's performance and aesthetics. Furthermore, the adhesives used in mainstream stickers are mostly super-adhesive and strong-adhesive types. These adhesives often leave residues after use that are difficult to remove completely, are not environmentally friendly, and do not meet the requirements for skin adhesion, further narrowing the application range of stickers.

[0005] In terms of visual presentation, while existing stickers offer effects such as iridescent colors, they suffer from a serious deficiency in creating a sense of three-dimensionality. Most current stickers employ flat designs, lacking depth and realism, failing to deliver a strong visual impact and unique experience for consumers. Especially in cultural and creative applications that demand high levels of artistic expression and detail, flat stickers fall short, unable to fully showcase rich cultural connotations and artistic value, and failing to meet consumers' growing aesthetic needs. Utility Model Content

[0006] To overcome the aforementioned defects or one of the defects in existing technologies, this utility model proposes a sticker with a three-dimensional embossed effect, meeting market demand and enhancing the competitiveness of cultural and creative stickers. The technical solution adopted is as follows:

[0007] A TPU sticker with a three-dimensional embossed effect includes a printed coating, a display layer, a face material layer, an adhesive layer, and a release layer stacked from top to bottom. Unlike existing technologies, the face material layer is a thermoplastic polyurethane elastomer film with a thickness of 60-100μm. The printed coating includes a UV white ink base layer, a UV white ink partial layer, a UV colored ink layer, and a UV varnish layer stacked from bottom to top.

[0008] Furthermore, the thickness of the UV white ink underlayer is 20-50μm, the thickness of the UV white ink local layer is 80-120μm, the thickness of the UV colored ink layer is 18-36μm, and the thickness of the UV varnish layer is 10-30μm.

[0009] Furthermore, the adhesive layer is a removable oil-based adhesive coating with an initial tack of 4N-6N / 25mm and a 180° peel strength of 4-5N / 25mm.

[0010] Furthermore, the release layer is a PET film with a thickness of 100 μm.

[0011] Furthermore, the display layer is a 25μm optical-grade PET film with a surface tension of 36-40 mN / m at a temperature of 25℃ and a relative humidity of 50%.

[0012] Furthermore, the lower surface of the display layer is corona-treated to form a polarization layer.

[0013] Furthermore, the upper surface of the display layer is subjected to corona treatment to form a polarization layer.

[0014] Furthermore, the inner surface of the release layer is coated with silicone oil to form a release film layer.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects:

[0016] 1. Superior Material Performance: The face material is made of thermoplastic polyurethane elastomer (TPU) film, which is soft and effectively solves the problem of edge lifting when applying stickers to curved surfaces, making the application scenarios of the stickers more extensive. At the same time, TPU, as a commonly used medical material, is safe and reliable, and has properties such as waterproof and breathable, non-allergenic, highly elastic, transparent, and antibacterial. It can be directly applied to human skin, which is an advantage that traditional sticker face materials (such as paper and common film materials) do not have, thus improving safety and expanding the scope of applications.

[0017] 2. Outstanding Printing Effect: The printing process utilizes environmentally friendly UV overlay printing technology, enabling the stickers to present a more visually impactful three-dimensional embossed effect. This effect provides superior display and promotional results in advertising and signage. Compared to traditional stickers that are primarily printed using offset printing and lack depth and realism in their designs, this better satisfies consumers' pursuit of visual impact and unique experiences. In cultural and creative applications, it further showcases rich cultural connotations and artistic value.

[0018] 3. Excellent Adhesive Performance: The adhesive layer uses a removable oil-based adhesive with an initial ring tack of 4N-6N / 25mm and a 180° peel strength of 4-5N / 25mm. This design ensures that the sticker leaves no residue on the bonded surface and does not damage the object being adhered to. It solves the problem of residual and difficult-to-remove adhesive residue left by mainstream sticker adhesives on the market, making it both environmentally friendly and improving the user experience.

[0019] 4. Enhanced overall competitiveness: This utility model solves many problems of existing stickers in terms of materials and three-dimensional effects, meets consumers' demand for personalized and high-quality cultural and creative stickers, enhances the competitiveness of cultural and creative stickers in the market, and promotes technological progress and product upgrades in the cultural and creative sticker industry. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the structure of the printing coating of this utility model. Detailed Implementation

[0022] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] like Figure 1-2 The TPU sticker shown has a three-dimensional embossed effect and includes a printed coating layer 1, a display layer 2, a face material layer 3, an adhesive layer 4, and a release layer 5 stacked from top to bottom. The face material layer 3 is a thermoplastic polyurethane elastomer film with a thickness of 80 μm. The printed coating layer 1 includes a UV white ink underlayer 11, a UV white ink partial layer 12, a UV colored ink layer 13, and a UV varnish layer 14 stacked from bottom to top.

[0024] This TPU sticker with a three-dimensional embossed effect achieves a unique appearance and practical performance through the synergistic effect of its various layers.

[0025] Overall Structure: This TPU sticker consists of a printed coating layer 1, a display layer 2, a face material layer 3, an adhesive layer 4, and a release layer 5, stacked sequentially from top to bottom. Each layer has a specific function, collectively forming this sticker.

[0026] Top layer 3: Made of thermoplastic polyurethane elastomer film with a thickness of 70μm. This material is soft and can solve the problem of stickers lifting at the edges when applied to curved surfaces, expanding its application scenarios. Moreover, thermoplastic polyurethane elastomer is a commonly used medical material with advantages such as waterproof and breathable properties, non-allergenicity, high elasticity, transparency, and antibacterial properties, making it highly safe and even suitable for direct application to human skin.

[0027] Printed coating 1: It is composed of UV white ink base layer 11, UV white ink partial layer 12, UV colored ink layer 13 and UV varnish layer 14 stacked from bottom to top.

[0028] UV white ink undercoat 11: This is the bottom layer of the printing coating, providing a foundation for subsequent ink adhesion. It enhances the adhesion between the ink and the underlying material, making the entire printed pattern more durable and less prone to peeling. At the same time, the white undercoat also acts as a mask, preventing the colors of the lower layer from affecting the colors of the upper layer, ensuring color purity and vibrancy.

[0029] UV White Ink Partial Layer 12: By applying UV white ink to specific areas, you can enhance the three-dimensionality and layering of certain parts according to design requirements. When creating a 3D embossed effect, this layer can be used to thicken or specially treat the parts of the pattern that need to be highlighted, making the sticker present a more realistic 3D effect.

[0030] UV ink layer 13: Used to present various colors and realize a wide variety of pattern designs. UV ink has the characteristics of fast curing speed, bright colors, and good weather resistance, which can make the pattern of the sticker full and clear, and it is not easy to fade after long-term use, ensuring the aesthetics and durability of the sticker.

[0031] UV varnish layer 14: Located on top of the printed coating, its main function is to protect the printed pattern. It improves the abrasion and scratch resistance of the sticker surface, preventing the pattern from being easily damaged. In addition, the UV varnish layer can increase the gloss of the sticker surface, making the entire sticker look brighter and further enhancing the visual impact of the 3D embossed effect.

[0032] In another preferred embodiment, the thickness of the UV white ink underlayer 11 is 20 μm, the thickness of the UV white ink partial layer 12 is 80 μm, the thickness of the UV colored ink layer 13 is 18 μm, and the thickness of the UV varnish layer 14 is 10 μm. In this embodiment, the thickness of each part of the printed coating is precisely controlled. The UV white ink underlayer lays the foundation for ink adhesion and affects the pattern's durability and color; the thickness of the UV white ink partial layer significantly enhances the three-dimensional effect; the UV colored ink layer is responsible for presenting rich colors; and the UV varnish layer protects the pattern and improves surface gloss and abrasion resistance.

[0033] In another preferred embodiment, the thickness of the UV white ink underlayer 11 is 50 μm, the thickness of the UV white ink partial layer 12 is 120 μm, the thickness of the UV colored ink layer 13 is 36 μm, and the thickness of the UV varnish layer 14 is 30 μm.

[0034] In another preferred embodiment, the adhesive layer 4 is a removable oil-based adhesive coating with an initial tack of 4N-6N / 25mm and a 180° peel strength of 4-5N / 25mm. In this embodiment, the adhesive layer uses a removable oil-based adhesive coating. Its initial tack of 4-6N / 25mm and 180° peel strength of 4-5N / 25mm ensure adequate adhesion when the sticker is applied, leaving no residue on the surface of the object after removal, and without damaging the object.

[0035] In another preferred embodiment, the release layer 5 is a PET film with a thickness of 100 μm. This embodiment uses PET film as the release layer with a thickness of 100 μm. PET material has good stability, and this thickness ensures that the release layer effectively isolates the adhesive layer, making it easy to remove the sticker and preventing deformation or damage.

[0036] In another preferred embodiment, the display layer 2 is a 25μm optical-grade PET film with a surface tension of 36-40 mN / m at a temperature of 25°C and a relative humidity of 50%.

[0037] In another preferred embodiment, the lower surface of the display layer 2 is corona-treated to form a polarized layer. This embodiment involves corona-treating the lower surface of the display layer to form a polarized layer. This treatment increases surface activity, enhances adhesion to the underlying material, and makes the display layer bond more tightly to other layers, ensuring the overall stability of the sticker structure.

[0038] In another preferred embodiment, the upper surface of the display layer 2 is corona-treated to form a polarized layer. This embodiment, by corona-treating the upper surface of the display layer to form a polarized layer, enhances surface activity, improves ink adhesion, makes the printed pattern more durable, achieves better presentation, and makes the sticker pattern more vibrant and the details clearer.

[0039] In another preferred embodiment, the inner surface of the release layer 5 is coated with silicone oil to form a release film layer. This embodiment, by coating the inner surface of the release layer with silicone oil to form a release film layer, can significantly reduce the adhesion between the release layer and the adhesive layer, making it easier for the sticker to separate from the release layer during use, without affecting the adhesiveness of the adhesive layer.

[0040] This article introduces the manufacturing method of this utility model.

[0041] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

[0042] Any aspects of this utility model not described in detail are existing technology or common knowledge in the field.

Claims

1. A TPU sticker with a three-dimensional embossed effect, comprising a printed coating layer (1), a display layer (2), a face material layer (3), an adhesive layer (4), and a release layer (5) stacked together from top to bottom, characterized in that, The surface layer (3) is a thermoplastic polyurethane elastomer film with a thickness of 60-100μm; the printed coating (1) includes, from bottom to top, a UV white ink base layer (11), a UV white ink partial layer (12), a UV colored ink layer (13), and a UV varnish layer (14).

2. The TPU sticker with a three-dimensional embossed effect according to claim 1, characterized in that, The thickness of the UV white ink base layer (11) is 20-50μm, the thickness of the UV white ink partial layer (12) is 80-120μm, the thickness of the UV colored ink layer (13) is 18-36μm, and the thickness of the UV varnish layer (14) is 10-30μm.

3. The TPU sticker with a three-dimensional embossed effect according to claim 1, characterized in that, The adhesive layer (4) is a removable oil-based adhesive coating with an initial tack of 4N-6N / 25mm and a peel force of 4-5N / 25mm at 180°.

4. A TPU sticker with a three-dimensional embossed effect according to claim 1, characterized in that, The release layer (5) is a PET film with a thickness of 100 μm.

5. A TPU sticker with a three-dimensional embossed effect according to claim 1, characterized in that, The display layer (2) is a 25μm optical grade PET film with a surface tension of 36-40mN / m at a temperature of 25℃ and a relative humidity of 50%.

6. A TPU sticker with a three-dimensional embossed effect according to claim 1, characterized in that, The lower surface of the display layer (2) is corona-treated to form a polarized layer.

7. A TPU sticker with a three-dimensional embossed effect according to claim 1, characterized in that, The upper surface of the display layer (2) is treated with corona to form a polarization layer.

8. A TPU sticker with a three-dimensional embossed effect according to claim 1, characterized in that, The inner surface of the release layer (5) is coated with silicone oil to form a release film layer.

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