CN111261018A - A kind of linerless environmentally friendly thermal label and preparation method thereof - Google Patents

Abstract

The invention relates to a backing-paper-free environment-friendly thermosensitive label and a preparation method thereof, the backing-paper-free environment-friendly thermosensitive label comprises a thermosensitive composite layer and a gluing layer, the thermosensitive composite layer comprises a silicon oil layer, thermosensitive paper and a polyethylene layer, the silicon oil layer covers the thermosensitive surface of the thermosensitive paper, the polyethylene layer covers the non-thermosensitive surface of the thermosensitive paper, the silicon oil layer is UV solvent-free silicon or water-based silicone oil, the polyethylene layer is composed of low-density polyethylene and high-density polyethylene, the backing-paper-free environment-friendly thermosensitive label is rolled to form a product, the cost is saved, and the product is light and thin.

Description

A kind of linerless environmentally friendly thermal label and preparation method thereof

technical field

The invention belongs to the field of labels, and in particular relates to a linerless environmentally friendly thermal label and a preparation method thereof.

Background technique

At present, thermal labels are widely used in supermarkets, logistics industries, product process identification or short-term product identification due to the fast and convenient printing. When the logistics industry involves user information confidentiality, product process traceability control, and product identification anti-counterfeiting requirements, three-layer thermal labels are often selected to meet the needs. There are currently two types of three-layer thermal labels: the first type is thermal labeling. It is composed of sensitive composite layer, glue and release paper, wherein the thermal composite layer is the thermal paper of the first layer and the film or paper of the second layer are pasted together by adhesive, and its softness is general; the second type is also thermal It is composed of a sensitive composite layer, glue and release paper, but the thermally sensitive composite layer is the first layer of thermal paper and the second layer of polyethylene film pasted together through a coating process, and its flexibility is good. Both of these two types of products contain release paper. When the label is separated from the release paper, waste of release paper will be generated, causing environmental pollution and waste of resources.

SUMMARY OF THE INVENTION

The first object of the present invention is to provide a linerless environmentally friendly thermal label. To achieve the above object, the present invention adopts the following technical solutions:

A linerless environmentally friendly thermal label, comprising a thermal composite layer and an adhesive layer, the thermal composite layer includes a silicone oil layer, a thermal paper, and a polyethylene layer, and the silicone oil layer covers the thermal paper. On the heat-sensitive surface of the thermal paper, the polyethylene layer covers the non-heat-sensitive surface of the thermal paper.

The advantages of the present invention are:

The thermal paper and the polyethylene layer do not need glue, which is environmentally friendly and pollution-free; there is no release paper, which can reduce the square gram weight, save costs, and the product is light and thin.

The present invention can be improved through the following scheme:

The silicone oil layer is UV solvent-free silicone or water-based silicone oil.

The polyethylene layer is composed of low density polyethylene and high density polyethylene.

The adhesive layer is a hot-melt pressure-sensitive adhesive or a water-based pressure-sensitive adhesive.

The second object of the present invention is to provide a preparation method of a linerless environmentally friendly thermal label.

A preparation method of the linerless environmentally friendly thermal label, comprising:

a. The silicone oil layer is coated on the heat-sensitive surface of the heat-sensitive paper by a coating machine and then cured by an oven;

b. Mix the low-density polyethylene and the high-density polyethylene evenly together by a mixer, melt the polyethylene layer obtained by mixing through a laminating machine, and then uniformly coat the non-heating paper of the thermal paper through a die head. sensitive face;

c. After completing step a and step b, the heat-sensitive composite layer is obtained, and an adhesive layer is coated on the heat-sensitive composite layer to form the linerless environmentally friendly heat-sensitive label, which is rolled to form a product.

The invention has the advantages of convenient and simple processing, energy saving, green environmental protection.

The present invention can be improved through the following scheme:

After the water-based pressure-sensitive adhesive is coated on the heat-sensitive composite layer, the adhesive layer needs to be dried in an oven after coating. The coating amount of the polyethylene layer is 10-40 g/the coating amount of the silicone oil layer is 0.5-3 g/m ² .

Description of drawings

FIG. 1 is a schematic structural diagram of an environmentally friendly thermal label without a liner in an embodiment.

In the figure, 1. Silicone oil layer, 2. Thermal paper, 3. Polyethylene layer, 4. Adhesive layer.

Detailed ways

A linerless environmentally friendly thermal label, comprising a thermal composite layer and an adhesive layer 4, the thermal composite layer comprises a silicone oil layer 1, a thermal paper 2, a polyethylene layer 3, and the silicone oil layer 1 covers the thermal paper 2. On the heat-sensitive surface of the thermal paper 2, the polyethylene layer 3 covers the non-heat-sensitive surface of the thermal paper 2.

The silicone oil layer 1 is UV solvent-free silicone or water-based silicone oil.

The polyethylene layer 3 is composed of low density polyethylene and high density polyethylene.

The adhesive layer 4 is a hot-melt pressure-sensitive adhesive or a water-based pressure-sensitive adhesive.

A preparation method of a linerless environment-friendly thermal label, comprising:

a. The silicone oil layer 1 is coated on the heat-sensitive surface of the heat-sensitive paper 2 by a coating machine and then cured by an oven;

b. Mix low-density polyethylene and high-density polyethylene evenly with a mixer, melt the mixed polyethylene layer 3 through a laminating machine, and then uniformly coat the non-thermal surface of thermal paper 2 through a die head superior;

c. After completing step a and step b, a heat-sensitive composite layer is obtained, and an adhesive layer 4 is coated on the heat-sensitive composite layer to form a linerless environmentally friendly heat-sensitive label, which is rolled to form a product.

The adhesive layer 4 coated on the heat-sensitive composite layer is a water-based pressure-sensitive adhesive, which needs to be dried in an oven. The coating amount of the polyethylene layer 3 is 10 to 40 g/m ² .

The coating amount of the silicone oil layer 1 is 0.5 to 3 g/m ² .

The above-mentioned embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention are equivalent to The replacement modes are all included in the protection scope of the present invention.

Claims (9)

1. an environmentally friendly thermal label without a bottom paper, comprising a thermal composite layer and an adhesive coating, characterized in that the thermal composite layer comprises a silicone oil layer, a thermal paper, a polyethylene layer, and the silicone oil layer covers On the heat-sensitive surface of the thermal paper, the polyethylene layer covers the non-heat-sensitive surface of the thermal paper. 2 . A linerless environmentally friendly thermal label according to claim 1 , wherein the silicone oil layer is UV solvent-free silicone or water-based silicone oil. 3 . 3. A linerless environmentally friendly thermal label according to claim 2, wherein the polyethylene layer is composed of low density polyethylene and high density polyethylene. 4 . The linerless environmentally friendly thermal label according to claim 3 , wherein the adhesive layer is a hot-melt pressure-sensitive adhesive. 5 . 5. A linerless environmentally friendly thermal label according to claim 3, wherein the adhesive layer is a water-based pressure-sensitive adhesive. 6. A method for preparing a linerless environmentally friendly thermal label according to any one of claims 1 to 5, characterized in that, comprising: a. The silicone oil layer is coated on the heat-sensitive surface of the heat-sensitive paper by a coating machine and then cured by an oven; b. Mix the low-density polyethylene and the high-density polyethylene evenly together by a mixer, after the polyethylene layer obtained by mixing is melted by a laminating machine, and then uniformly coated on the non-contact surface of the thermal paper through a die head thermal surface; c. After completing step a and step b, the heat-sensitive composite layer is obtained, and an adhesive layer is coated on the heat-sensitive composite layer to form the linerless environmentally friendly heat-sensitive label, which is rolled to form a product. 7. the preparation method of a kind of linerless environment-friendly thermal label according to claim 5, is characterized in that, after coating described glued layer on described heat-sensitive composite layer, also needs to use oven to be dried . 8 . The method for preparing a linerless environmentally friendly thermal label according to claim 6 , wherein the polyethylene layer has a coating amount of 10-40 g/m ² . 9 . The method for preparing a linerless environmentally friendly thermal label according to claim 8 , wherein the coating amount of the silicone oil layer is 0.5-3 g/m ² .

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