A roll type heat-sensitive label of a block of self-adhesive without a backing paper

Abstract

The utility model relates to a kind of no bottom paper tape intermittent self-adhesive block's roll type heat-sensitive label, it is characterized by: including continuous banding substrate, coating on the upper surface of substrate heat-sensitive developer, coating on the upper surface of heat-sensitive developer silicone oil, the above-mentioned three combinations form label body;Substrate lower surface is coated with self-adhesive block along length direction equidistant distribution, and avoid label edge one side 10~20mm, the other side 1~2mm, label body is divided into several independent label units along length direction, one side printing has black mark between adjacent unit, label body is wound in tube core outer, overcome the resource waste and production complex problem caused by bottom paper, solve the inconvenient to take, easy to remain and production quality unstable problem caused by self-adhesive continuous coating.

Description

Technical Field

[0001] This patent belongs to the field of office paper, and specifically relates to a roll-type thermal label with intermittent self-adhesive blocks without a backing paper. Background Technology

[0002] In today's commodity circulation and information labeling fields, roll-to-roll thermal labels are widely used in logistics, retail, healthcare, and many other industries due to their convenient printing characteristics. Traditional roll-to-roll thermal labels typically employ a structure with a backing paper and a continuously coated self-adhesive layer. However, with industry development and increased environmental awareness, the drawbacks of this traditional structure have become increasingly apparent.

[0003] From an environmental perspective, the backing paper of traditional roll-type thermal labels is mostly a single-use material. After the label is affixed to the product or packaging, the backing paper is discarded, resulting in significant resource waste. Furthermore, the production process of the backing paper consumes a large amount of energy and raw materials, which is inconsistent with the concept of sustainable development.

[0004] In terms of manufacturing, the backing paper structure increases the complexity and cost of the production process. The production process not only requires specialized equipment to bond the heat-sensitive face stock to the backing paper, but also necessitates continuous coating of the adhesive layer. This not only demands higher equipment investment and maintenance costs, but also limits production efficiency.

[0005] In practical use, traditional labels also present many inconveniences. The continuous adhesive layer makes it easy for labels to come off or tear when peeled off, especially on automated production lines where rapid labeling is required, leading to reduced labeling efficiency. Moreover, after the continuous adhesive layer is applied, removing the label often leaves a large amount of adhesive residue, affecting the cleanliness of the surface of the object and potentially damaging the surface coating or material.

[0006] In summary, traditional roll-type thermal labels with a backing paper and continuously coated self-adhesive layer have many shortcomings in terms of environmental protection, production, and use. There is an urgent need to develop a roll-type thermal label without a backing paper and with intermittent self-adhesive blocks to solve the above problems and meet the new needs of industry development. Summary of the Invention

[0007] The purpose of this patent is to provide a roll-type thermal label with intermittent self-adhesive blocks without a backing paper, which overcomes the resource waste and production complexity caused by traditional backing paper, and solves the problems of inconvenient peeling, easy residue and unstable production quality caused by continuous self-adhesive coating, thereby achieving environmentally friendly, efficient production and convenient use.

[0008] To achieve the above objectives, this patent adopts the following technical solution: This roll-type thermal label with intermittent self-adhesive blocks without a backing paper includes a continuous strip-shaped substrate, a thermal colorant coated on the upper surface of the substrate, and silicone oil coated on the upper surface of the thermal colorant. The above three are combined to form the label body; self-adhesive blocks are evenly distributed along the length direction on the lower surface of the substrate, avoiding the label edge by 10-20mm on one side and 1-2mm on the other side, dividing the label body into several independent label units along the length direction. A black mark is printed on one side between adjacent units, and the label body is rolled up outside the core.

[0009] The label body is wound without a core.

[0010] Compared with existing technologies, the beneficial effects of this patent are as follows: The roll-type thermal label with intermittent self-adhesive blocks without a backing paper, as described in this patent, adopts a structure in which thermal colorant and silicone oil are sequentially coated on the substrate, and intermittent self-adhesive blocks and printed black marks are coated on the underside of the substrate. It is then wound into a roll-type thermal label using a core. This structural design, which uses a self-release layer to replace the backing paper and intermittent self-adhesive coating, allows the printer to identify the label's dividing position for printing and cutting positioning via the black marks. It is suitable for automated labeling equipment or for manual removal of the cut label units directly from the adhesive-free edge. This solves the problems of wasteful backing paper and complex production associated with traditional labels, while avoiding labeling failures, inconvenient removal, and adhesive residue caused by continuous self-adhesive layers. It fully meets the environmentally friendly, efficient, and stable requirements of industries such as logistics and retail. Attached Figure Description

[0011] Appendix Figure 1 This is a schematic diagram of the structure of the finished product of this patent.

[0012] Appendix Figure 2 This is a schematic diagram of the cross-sectional structure of this patent.

[0013] Appendix Figure 3 This is a schematic diagram of the coreless finished product of this patent.

[0014] Explanation of symbols in the attached diagram: 1—substrate, 2—thermosensitive colorant, 3—silicone oil, 4—adhesive block, 5—black mark, 6—core. Detailed Implementation

[0015] To make the implementation purpose, technical solution and advantages of this patent clearer, the following detailed description of the patent solution by way of embodiments, in conjunction with the accompanying drawings, is provided.

[0016] As attached Figure 1 and 2As shown, this roll-type thermal label with intermittent self-adhesive blocks without a backing paper includes a continuous strip-shaped substrate 1, a thermal colorant 2 coated on the upper surface of the substrate 1, and silicone oil 3 coated on the upper surface of the thermal colorant 2. The substrate 1, thermal colorant 2, and silicone oil 3 are combined to form the label body. Self-adhesive blocks 4 are evenly distributed along the length direction on the lower surface of the substrate 1, avoiding the label edge by 10-20 mm on one side and 1-2 mm on the other side, dividing the label body into several independent label units along the length direction. A black mark 5 is printed on one side between adjacent units. The label body is wound up outside the core 6.

[0017] Substrate 1 serves as the basic support layer for the label, supporting the various functional coatings and adapting to the paper feeding mechanism of the thermal printer. It can be made of paper, PVC, or PET film.

[0018] Thermosensitive colorant 2 is coated on the upper surface of substrate 1, with a coating thickness controllable to 15μm. Its composition includes 30% colorless dye triphenylmethane lactone, 25% bisphenol A color developer, 40% resin carrier, and 5% antioxidants and sensitizers. Function: It receives the localized high temperature of 120–150℃ from the thermal printhead, causing a reversible thermochromic reaction between the colorless dye and the color developer to form clear text, barcodes, or patterns, thus achieving information identification.

[0019] The silicone oil layer 3 can be coated onto the surface of the thermosensitive colorant 2 using a micro-gravure coating process. The coating thickness is generally 8μm, and the material is a solvent-based silicone release agent with a solid content of 30%. After coating, it is dried and cured at 120℃, and the release force is controlled at 5-8g / 25mm. Function: It replaces the independent backing paper of traditional labels, serving as a "self-release layer"—when the label is rolled up, the self-adhesive block 4 of the lower label comes into contact with the silicone oil layer 3 of the upper label. The low release force prevents the self-adhesive block 4 from sticking to the upper label, while not affecting the printing and color development effect of the thermosensitive colorant 2.

[0020] The self-adhesive block 4 can be intermittently coated onto the lower surface of the substrate 1 using a textured roller coating process. The coating area corresponds to the label unit, and the adhesive layer thickness can be 20μm. The material is water-based acrylic pressure-sensitive adhesive. The self-adhesive block 4 shown in the illustration is rectangular, but it can be designed as a square, circle, wavy, or other shapes according to actual needs. Function: To achieve the label's adhesive function. The intermittent coating design reduces adhesive usage and avoids adhesive residue on the cutting tool during label cutting, which can occur with continuous adhesive layers. Simultaneously, the adhesive layer avoids the label edges, preventing adhesive overflow and contamination of the object being labeled. Furthermore, this type of label is non-sticky to the touch and leaves minimal adhesive residue on the object when removed.

[0021] Black Mark 5 is printed on the lower surface of substrate 1 using offset or flexographic printing. Black Mark 5 is a rectangular strip, and the ink used is black UV ink with an opacity of ≥95%. The printing position deviation is ≤±0.2mm. Function: As a positioning marker for the printing equipment, the photoelectric sensor identifies the edge signal of Black Mark 5 to precisely control the paper feed distance, printing start / stop, and cutting position of the printer, ensuring that the information of each label unit is printed within the designated area.

[0022] Core 6 is made of cardboard or plastic tubing. Its function is to serve as a support for the label roll, facilitating label mounting onto the printer's core holder. When produced on a coreless slitting machine, coreless products can also be produced, such as those shown below. Figure 3 As shown.

[0023] In this embodiment, the roll-type thermal label with intermittent self-adhesive blocks and no backing paper is used by installing the label roll onto the core support of the thermal label printer. The printer identifies the black mark 5 through a photoelectric sensor, locates the first label unit, and the thermal print head heats the thermal colorant 2 to complete the printing of information such as barcodes and prices. The printer cuts the label along the boundary between adjacent black marks 5. The cut label unit is picked up by automated labeling equipment or manually and pasted onto the surface of the target object such as goods or packaging through the self-adhesive block 4 on its lower surface. If the label needs to be removed, it can be gently peeled off along the edge of the label, leaving no adhesive residue on the surface of the object.

[0024] The technical solution described in this patent uses common materials, is suitable for industrial production, and is feasible and practical.

Claims

1. A roll-type thermal label with intermittent self-adhesive blocks and no backing paper, characterized in that: The label body consists of a continuous strip of substrate, a thermosensitive colorant coated on the surface of the substrate, and silicone oil coated on the surface of the thermosensitive colorant. The three components are combined to form the label body. Self-adhesive blocks are evenly distributed along the length of the lower surface of the substrate, avoiding the label edge by 10-20 mm on one side and 1-2 mm on the other side. The label body is divided into several independent label units along the length of the label. A black label is printed on one side between adjacent units. The label body is rolled up outside the core.

2. The roll-type thermal label with intermittent self-adhesive blocks without a backing paper as described in claim 1, characterized in that: The label body is wound without a core.

3. The roll-type thermal label with intermittent self-adhesive blocks without a backing paper as described in claim 2, characterized in that: The substrate is made of paper, PVC film, or PET film.

4. The roll-type thermal label with intermittent self-adhesive blocks without a backing paper as described in claim 3, characterized in that: The silicone oil layer has a thickness of 8μm and is made of solvent-based silicone release agent.

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