Biodegradable adhesive tape

Abstract

This utility model discloses a biodegradable adhesive tape comprising a separating layer, a substrate layer, and an adhesive layer, which are successively stacked. The biodegradable adhesive tape in this utility model exhibits excellent biodegradability, can degrade into water and carbon dioxide in a natural environment after disposal and composting, and will not cause secondary pollution in the environment.

Description

Title of the invention: Biodegradable adhesive tape Technical field

[0001] The present utility model relates to the technical field of adhesive tapes and, in particular, to a biodegradable adhesive tape. Background technology

[0002] Packaging tape is widely used in the market, and it is needed in many industries in daily production and life. Especially in the currently booming logistics industry, the demand for packaging tapes is increasing sharply. At present, in the domestic market, the substrate of a packaging tape is mainly a petroleum-based polypropylene film. However, a tape having a polypropylene plastic film as a substrate is not biodegradable after disposal and therefore causes serious environmental pollution. In addition, cartons having adhesive tapes cannot be directly pulped, and the adhesive tapes must be separated manually. This is a great inconvenience for carton recycling. Description of the Utility Model

[0003] The objective of the present utility model is to remedy the above drawbacks mentioned and to provide a biodegradable adhesive tape that has excellent biodegradability, can degrade into water and carbon dioxide in a natural environment after disposal and composting, and will not cause secondary pollution to the environment.

[0004] In order to achieve the above objective, the present utility model provides a biodegradable adhesive tape, which comprises a release layer, a substrate layer and an adhesive layer which are successively stacked; wherein, said substrate layer is a cellulose film layer, and said adhesive layer is prepared by means of a water-based pressure-sensitive adhesive.

[0005] By adopting the above technical solution, the cellulose film is biodegradable and the cellulose film layer is used as a substrate layer so that the biodegradable adhesive tape in the present utility model will not cause secondary pollution to the environment after use. In addition, the cellulose film has excellent tensile strength, flexibility, high temperature deformation resistance and excellent printing and composite performance.

[0006] The method for preparing the biodegradable adhesive tape comprises the following steps: coating a layer of release agent on a surface of the substrate layer to form a release layer, coating a layer of water-based pressure-sensitive adhesive on the other surface of the substrate layer, and then conveying it to an oven for drying to obtain said biodegradable adhesive tape;

[0007] in which the oven temperature is between 65 and 90°C;

[0008] in which the drying time is between 10 and 15 s.

[0009] The water absorption of the cellulose film is similar to that of ordinary paper, it is easily deformed after contact with water, and its hardness is significantly reduced. In the present utility model, the substrate layer coated with a water-based pressure-sensitive adhesive is dried for 10 to 15 s at room temperature of 65 to 90°C to realize the rapid drying of the water-based pressure-sensitive adhesive and ensure that the moisture content of the water-based pressure-sensitive adhesive penetrating into the substrate layer will not deform the substrate layer.

[0010] Wherein, when the oven temperature is lower than 65°C, the drying time is long, and the drying time is more than 20 s. After drying, the moisture in the water-based pressure-sensitive adhesive penetrates into the substrate layer and deforms the substrate layer, which is unsuitable for the subsequent winding process of the adhesive tape and reduces the production efficiency.

[0011] Wherein, when the temperature in the oven is higher than 90°C and although the drying time is reduced, the moisture in the water-based pressure-sensitive adhesive penetrating into the substrate layer deforms the substrate layer and curls the edges, which is unsuitable for the subsequent winding process of the adhesive tape and reduces the yield.

[0012] Wherein, when the temperature in the oven is between 65 and 90°C and the drying time is less than 10 s, although the substrate layer hardly deforms, the water-based pressure-sensitive adhesive is not completely dried. When the temperature in the oven is between 65 and 90°C and the drying time is more than 15 s, the substrate layer gradually deforms, which is unsuitable for the subsequent winding process of the adhesive tape and reduces the yield.

[0013] Further, in the method for preparing the biodegradable adhesive tape, the water-based pressure-sensitive adhesive is coated on the surface of said substrate layer by means of winding bar coating or squeegee coating.

[0014] Furthermore, the humidity of said oven is between 47% and 92%.

[0015] By adopting the above technical solution, the drying time can be further shortcut by regulating the humidity in the oven between 47% and 92% to further improve production efficiency.

[0016] Furthermore, the drying time can be further shortened by increasing the speed airflow from the rubber surface in the oven to further improve production efficiency.

[0017] In the present utility model, the water-based pressure-sensitive adhesive is dried rapidly for 10 to 15 s at room temperature of 65 to 90°C, and the moisture content of the water-based pressure-sensitive adhesive penetrating into the substrate layer will deform the substrate layer. This ensures that the subsequent winding process of the adhesive tape can be carried out efficiently, and the yield of the biodegradable adhesive tapes is improved.

[0018] Compared with the prior art, the present utility model has the following beneficial effects: a biodegradable adhesive tape in the present utility model has excellent biodegradability, can degrade into water and carbon dioxide in a natural environment after disposal and composting, and will not cause secondary pollution to the environment. When the biodegradable adhesive tape in the present utility model is used as a packaging tape, cartons having the biodegradable adhesive tapes in the present utility model can be recycled based on their biodegradability, which can reduce the disposal steps of the adhesive tape, reduce the recycling cost of cartons, improve the recycling rate of cartons, and reduce the consumption of natural resources. Description of the figures

[0019] [Fig.l] is a structural diagram of a biodegradable adhesive tape in the present utility model.

[0020] The corresponding relationship between a marker and a part name is as follows:

[0021] separation layer 1, substrate layer 2 and adhesive layer 3.

[0022] Detailed Description of Preferred Embodiments

[0023] In order to make the technical means, creation features, expected objectives and effects of the utility model easily understandable, the present utility model is explained in more detail with the help of specific diagrams.

[0024] The figures, structures, proportions, sizes, etc. attached to this specification are only used to explain the contents disclosed in the specification for those familiar with this technology for the purpose of understanding and reading, and they are not used to limit the application conditions of this utility model. Therefore, they have no actual technical significance. Any modification of structure, change of proportion, or adjustment of size shall still fall within the technical contents disclosed in this utility model without affecting the effects and purpose of this utility model. Furthermore, terms such as "top," "bottom," "left," "right," "middle," and "a" cited in this specification are only for the convenience of description, and they are not used to limit the scope of this utility model. Changing or adjusting their relative relationships should also fall within the scope of this utility model without any substantial change in the technical content. Embodiment 1

[0025] Referring to [Fig.l], this embodiment discloses a biodegradable adhesive tape, which comprises a release layer 1, a substrate layer 2 and an adhesive layer 3 which are successively stacked; wherein, the substrate layer 2 is a cellulose film layer, and the adhesive layer 3 is prepared by means of a water-based pressure-sensitive adhesive.

[0026] The moisture content of the water-based pressure-sensitive adhesive in this embodiment is between 40% and 50%.

[0027] The method for preparing the biodegradable adhesive tape comprises the following steps: coating a release agent on one surface of the substrate layer 2 to form a release layer 1, coating a water-based pressure-sensitive adhesive layer on the other surface of the substrate layer 2 by means of a squeegee, and then conveying it to an oven for drying to obtain the biodegradable adhesive tape;

[0028] in which the oven temperature is 65°C;

[0029] in which the drying time is 14 s;

[0030] in which the humidity of the oven is 60%.

[0031] The substrate layer 2 in the biodegradable adhesive tape prepared by the above method does not deform. Embodiment 2

[0032] Referring to [Fig.l], this embodiment discloses a biodegradable adhesive tape, which comprises a release layer 1, a substrate layer 2 and an adhesive layer 3 which are successively stacked; wherein, the substrate layer 2 is a cellulose film layer, and the adhesive layer 3 is prepared by means of a water-based pressure-sensitive adhesive.

[0033] The moisture content of the water-based pressure-sensitive adhesive in this embodiment is between 40% and 50%.

[0034] The method for preparing the biodegradable adhesive tape comprises the following steps: coating a release agent on one surface of the substrate layer 2 to form a release layer 1, coating a water-based pressure-sensitive adhesive layer on the other surface of the substrate layer 2 by means of a squeegee, and then conveying it to an oven for drying to obtain the biodegradable adhesive tape;

[0035] in which the oven temperature is 90°C;

[0036] in which the drying time is 10 s;

[0037] in which the humidity of the oven is 60%.

[0038] The substrate layer 2 in the biodegradable adhesive tape prepared by the above method does not deform. Embodiment 3

[0039] Referring to [Fig.l], this embodiment discloses a biodegradable adhesive tape, which comprises a release layer 1, a substrate layer 2 and an adhesive layer 3 which are successively stacked; wherein, the substrate layer 2 is a cellulose film layer, and the adhesive layer 3 is prepared by means of a water-based pressure-sensitive adhesive.

[0040] The moisture content of the water-based pressure-sensitive adhesive in this embodiment is between 40% and 50%.

[0041] The method for preparing the biodegradable adhesive tape comprises the following steps: coating a release agent on one surface of the substrate layer 2 to form a release layer 1, coating a layer of water-based pressure-sensitive adhesive on the other surface of the substrate layer 2 by means of a squeegee, and then conveying it to an oven for drying to obtain the biodegradable adhesive tape;

[0042] in which the oven temperature is 70°C;

[0043] in which the drying time is 13 s;

[0044] in which the humidity of the oven is 60%.

[0045] The substrate layer 2 in the biodegradable adhesive tape prepared by the above method does not deform. Embodiment 4

[0046] Referring to [Fig.l], this embodiment discloses a biodegradable adhesive tape, which comprises a release layer 1, a substrate layer 2 and an adhesive layer 3 which are successively stacked; wherein, the substrate layer 2 is a cellulose film layer, and the adhesive layer 3 is prepared by means of a water-based pressure-sensitive adhesive.

[0047] The moisture content of the water-based pressure-sensitive adhesive in this embodiment is between 40% and 50%.

[0048] The method for preparing the biodegradable adhesive tape comprises the following steps: coating a release agent on one surface of the substrate layer 2 to form a release layer 1, coating a layer of water-based pressure-sensitive adhesive on the other surface of the substrate layer 2 by means of a squeegee, and then conveying it to an oven for drying. to obtain the biodegradable adhesive tape;

[0049] in which the oven temperature is 40°C;

[0050] in which the drying time is 22 s;

[0051] in which the humidity of the oven is 60%.

[0052] The drying treatment time is prolonged, and the substrate layer 2 in the biodegradable adhesive tape prepared by the above method becomes deformed, which is unsuitable for the subsequent winding process of the adhesive tape and reduces the production efficiency. Embodiment 5

[0053] Referring to [Fig.l], this embodiment discloses a biodegradable adhesive tape, which comprises a release layer 1, a substrate layer 2 and an adhesive layer 3 which are successively stacked; wherein, the substrate layer 2 is a cellulose film layer, and the adhesive layer 3 is prepared by means of a water-based pressure-sensitive adhesive.

[0054] The moisture content of the water-based pressure-sensitive adhesive in this embodiment is between 40% and 50%.

[0055] The method for preparing the biodegradable adhesive tape comprises the following steps: coating a release agent on one surface of the substrate layer 2 to form a release layer 1, coating a water-based pressure-sensitive adhesive layer on the other surface of the substrate layer 2 by means of a squeegee, and then conveying it to an oven for drying to obtain the biodegradable adhesive tape;

[0056] in which the oven temperature is 95°C;

[0057] in which the drying time is 10 s;

[0058] in which the humidity of the oven is 60%.

[0059] The substrate layer 2 in the biodegradable tape prepared by the above method becomes deformed, which is unsuitable for the subsequent winding process of the adhesive tape and reduces the yield. Embodiment 6

[0060] Referring to [Fig.l], this embodiment discloses a biodegradable adhesive tape, which comprises a release layer 1, a substrate layer 2 and an adhesive layer 3 which are successively stacked; wherein, the substrate layer 2 is a cellulose film layer, and the adhesive layer 3 is prepared using a water-based pressure-sensitive adhesive.

[0061] The moisture content of the water-based pressure-sensitive adhesive in this embodiment is between 40% and 50%.

[0062] The method for preparing the biodegradable adhesive tape comprises the steps following: coating a release agent on one surface of the substrate layer 2 to form a release layer 1, coating a layer of water-based pressure-sensitive adhesive on the other surface of the substrate layer 2 by means of a squeegee, and then conveying it to an oven for drying to obtain the biodegradable adhesive tape;

[0063] in which the oven temperature is 70°C;

[0064] in which the drying time is 8 s;

[0065] in which the humidity of the oven is 60%.

[0066] The substrate layer 2 in the biodegradable adhesive tape prepared by the above method does not deform, but the water-based pressure-sensitive adhesive is not completely dried. Embodiment 7

[0067] Referring to [Fig.l], this embodiment discloses a biodegradable adhesive tape, which comprises a release layer 1, a substrate layer 2 and an adhesive layer 3 which are successively stacked; wherein, the substrate layer 2 is a cellulose film layer, and the adhesive layer 3 is prepared using a water-based pressure-sensitive adhesive.

[0068] The moisture content of the water-based pressure-sensitive adhesive in this embodiment is between 40% and 50%.

[0069] The method for preparing the biodegradable adhesive tape comprises the following steps: coating a release agent on one surface of the substrate layer 2 to form a release layer 1, coating a water-based pressure-sensitive adhesive layer on the other surface of the substrate layer 2 by means of a squeegee, and then conveying it to an oven for drying to obtain the biodegradable adhesive tape;

[0070] in which the oven temperature is 70°C;

[0071] in which the drying time is 18 s;

[0072] in which the humidity of the oven is 60%.

[0073] The substrate layer 2 in the biodegradable tape prepared by the above method becomes deformed, which is unsuitable for the subsequent winding process of the adhesive tape and reduces the yield. Embodiment 8

[0074] Referring to [Fig.l], this embodiment discloses a biodegradable adhesive tape, which comprises a release layer 1, a substrate layer 2 and an adhesive layer 3 which are successively stacked; wherein, the substrate layer 2 is a cellulose film layer, and the adhesive layer 3 is prepared by means of a water-based pressure-sensitive adhesive.

[0075] The moisture content of the water-based pressure-sensitive adhesive in this embodiment is between 40% and 50%.

[0076] The method for preparing the biodegradable adhesive tape comprises the following steps: coating a release agent on one surface of the substrate layer 2 to form a release layer 1, coating a water-based pressure-sensitive adhesive layer on the other surface of the substrate layer 2 by means of a squeegee, and then conveying it to an oven for drying to obtain the biodegradable adhesive tape;

[0077] in which the oven temperature is 65°C;

[0078] in which the drying time is 12 s;

[0079] the humidity of the oven is 47%.

[0080] The substrate layer 2 in the biodegradable adhesive tape prepared by the above method does not deform. Embodiment 9

[0081] Referring to [Fig.l], this embodiment discloses a biodegradable adhesive tape, which comprises a release layer 1, a substrate layer 2 and an adhesive layer 3 which are successively stacked; wherein, the substrate layer 2 is a cellulose film layer, and the adhesive layer 3 is prepared by means of a water-based pressure-sensitive adhesive.

[0082] The moisture content of the water-based pressure-sensitive adhesive in this embodiment is between 40% and 50%.

[0083] The method for preparing the biodegradable adhesive tape comprises the following steps: coating a release agent on one surface of the substrate layer 2 to form a release layer 1, coating a water-based pressure-sensitive adhesive layer on the other surface of the substrate layer 2 by means of a squeegee, and then conveying it to an oven for drying to obtain the biodegradable adhesive tape;

[0084] in which the oven temperature is 65°C;

[0085] in which the drying time is 15 s;

[0086] the humidity of the oven is 92%.

[0087] The substrate layer 2 in the biodegradable adhesive tape prepared by the above method does not deform.

[0088] Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that numerous changes, modifications, substitutions and variations may be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

Claims

1. A biodegradable adhesive tape characterized in that it comprises a release layer, a substrate layer and an adhesive layer which are successively stacked; wherein, said substrate layer is a cellulose film layer, and said adhesive layer is a water-based pressure-sensitive adhesive layer.

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