Flame-retardant paper adhesive tape and preparation method thereof

Abstract

The invention discloses a flame-retardant paper adhesive tape and a preparation method thereof.The flame-retardant paper adhesive tape comprises a paper base material, a first impregnation layer and a second impregnation layer, the first impregnation layer and the second impregnation layer are formed on the two opposite sides of the paper base material and are both formed by impregnation liquid, and the impregnation liquid comprises polyvinyl chloride emulsion. An adhesive layer is arranged on the first impregnation layer, the adhesive layer is formed by an adhesive, and the adhesive comprises a flame retardant. According to the flame-retardant paper adhesive tape and the preparation method thereof, the first impregnation layer and the second impregnation layer are formed on the paper base material, so that the flame-retardant property of the paper base material is improved, in addition, the flame retardant is added into the adhesive, so that the flame-retardant property of the adhesive layer is improved, and the flame-retardant property of the flame-retardant paper adhesive tape is comprehensively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of adhesive tapes, and in particular relates to a flame retardant paper adhesive tape and a preparation method thereof. Background Art

[0002] The paper tape currently in use does not have flame retardant properties because its base material is paper. If there is an open flame during the use or transportation of the paper tape, it is easy to cause combustion problems.

[0003] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0004] The object of the present invention is to provide a flame retardant paper tape and a preparation method thereof, which can improve the flame retardant performance of the paper tape.

[0005] In order to achieve the above-mentioned purpose, a technical solution provided by a specific embodiment of the present invention is as follows: a flame-retardant paper tape, comprising a paper substrate and a first impregnation layer and a second impregnation layer formed on opposite sides of the paper substrate, the first impregnation layer and the second impregnation layer are both formed by an impregnation liquid, the impregnation liquid comprises a polyvinyl chloride emulsion, an adhesive layer is provided on the first impregnation layer, the adhesive layer is formed by an adhesive, and the adhesive comprises a flame retardant.

[0006] In one or more embodiments of the present invention, the impregnation liquid further includes styrene butadiene emulsion; the glass transition temperature of the polyvinyl chloride emulsion and the styrene butadiene emulsion is -30 to 5°C.

[0007] In one or more embodiments of the present invention, the paper substrate is any one of masking paper, Japanese paper, and kraft paper, and the gram weight of the paper substrate is 30 to 80 g / m 2 .

[0008] In one or more embodiments of the present invention, the sum of the impregnation amounts of the first impregnation layer and the second impregnation layer is 30% to 50% of the gram weight of the paper substrate.

[0009] In one or more embodiments of the present invention, the adhesive includes an acrylate-based pressure-sensitive adhesive and a phosphorus-based flame retardant.

[0010] In one or more embodiments of the present invention, a release layer is provided on the second impregnation layer.

[0011] In one or more embodiments of the present invention, the release layer is formed by coating a release agent, and the release agent is one of a long-chain alkyl compound, a copolymer or a blend, and a silicone release agent.

[0012] In one or more embodiments of the present invention, the coating amount of the release agent is 0.5 to 3.5 g / m 2 .

[0013] A specific embodiment of the present invention further provides a method for preparing the flame retardant paper tape as described above, comprising the following steps:

[0014] The paper substrate is immersed in the impregnation liquid, and after the impregnation liquid fully penetrates into the interior of the paper substrate, it is heated and dried to obtain a first impregnation layer and a second impregnation layer on the paper substrate;

[0015] After coating a layer of adhesive on the first impregnation layer, the layer is heated and dried to obtain an adhesive layer on the first impregnation layer.

[0016] In one or more embodiments of the present invention, the preparation method further comprises the following steps:

[0017] A layer of release agent is coated on the second impregnation layer, and then heated and dried to obtain a release layer on the second impregnation layer.

[0018] Compared with the prior art, the flame retardant paper tape and preparation method thereof of the present invention improve the flame retardant properties of the paper substrate by forming a first impregnation layer and a second impregnation layer on the paper substrate, and further improve the flame retardant properties of the adhesive layer by adding a flame retardant to the adhesive, thereby comprehensively improving the flame retardant properties of the flame retardant paper tape. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0020] A flame-retardant paper tape in an example of the present invention comprises a paper substrate and a first impregnation layer and a second impregnation layer formed on opposite sides of the paper substrate, wherein the first impregnation layer and the second impregnation layer are both formed of an impregnation liquid, wherein the impregnation liquid comprises a polyvinyl chloride emulsion, and an adhesive layer is provided on the first impregnation layer, wherein the adhesive layer is formed of an adhesive, and the adhesive comprises a flame retardant.

[0021] The flame retardant paper tape of the present invention improves the flame retardant properties of the paper substrate by forming a first impregnation layer and a second impregnation layer on the paper substrate, and further improves the flame retardant properties of the adhesive layer by adding a flame retardant to the adhesive, thereby comprehensively improving the flame retardant properties of the flame retardant paper tape.

[0022] It should be noted that the first impregnation layer and the second impregnation layer formed on opposite sides of the paper substrate can be understood as that the first impregnation layer and the second impregnation layer are partially formed inside the paper substrate and partially formed outside the paper substrate, that is, the first impregnation layer and the second impregnation layer are formed by immersing the paper substrate in an impregnation liquid and then forming them on opposite sides (two surfaces) of the paper substrate by heating and drying, that is, the first impregnation layer and the second impregnation layer are equivalent to coating the outside of the paper substrate and forming part of the inside of the paper substrate, thereby improving the flame retardancy of the paper substrate.

[0023] Specifically, the polyvinyl chloride emulsion can be the Vycar series product of Lubrizol, and the styrene butadiene emulsion can be the styrene butadiene emulsion LIGOS of Trinseo. TM I-4616.

[0024] Furthermore, the impregnation liquid further comprises styrene butadiene emulsion; the glass transition temperature of the polyvinyl chloride emulsion and the styrene butadiene emulsion is -30 to 5° C. Preferably, the glass transition temperature of the polyvinyl chloride emulsion and the styrene butadiene emulsion is -20 to 5° C.

[0025] That is, the impregnation liquid of the present invention may include only one substance, polyvinyl chloride emulsion; or, the impregnation liquid may include polyvinyl chloride emulsion and styrene-butadiene emulsion.

[0026] Specifically, the paper substrate is any one of textured paper, Japanese paper, and kraft paper; the gram weight of the paper substrate is 30 to 80 g / m 2 .

[0027] Specifically, the sum of the impregnation amounts of the first impregnation layer and the second impregnation layer is 30% to 50% of the gram weight of the paper substrate.

[0028] Specifically, the adhesive includes an acrylate pressure-sensitive adhesive and a phosphorus flame retardant, wherein the acrylate pressure-sensitive adhesive may be W-909 glue from Jinghua Company, and the phosphorus flame retardant may be Doher-6002A from Doher Chemical.

[0029] Specifically, a release layer is provided on the second impregnation layer.

[0030] Specifically, the release layer is formed by coating a release agent, and the release agent is one of a long-chain alkyl compound, a copolymer or a blend, and an organic silicon release agent. The release agent may be SUNCRYL CL223B from Omnofa.

[0031] Specifically, the coating amount of the release agent is 0.5 to 3.5 g / m 2 .

[0032] A specific example of the present invention also provides a method for preparing a flame retardant paper tape, which can be used to prepare the above-mentioned flame retardant paper tape, and the preparation method comprises the following steps:

[0033] The paper substrate is immersed in the impregnation liquid. After the impregnation liquid fully penetrates into the interior of the paper substrate, it is heated and dried to obtain a first impregnation layer and a second impregnation layer on the paper substrate.

[0034] Specifically, in the above steps, the drying temperature is 80 to 140° C., preferably 90 to 120° C., and the drying time is 1 to 2 minutes.

[0035] After coating a layer of adhesive on the first impregnation layer, the layer is heated and dried to obtain an adhesive layer on the first impregnation layer.

[0036] Specifically, in the above steps, the drying temperature is 60 to 120° C., preferably 80 to 120° C., and the drying time is 1 to 2 minutes.

[0037] The preparation method also includes the following steps:

[0038] A layer of release agent is coated on the second impregnation layer, and then heated and dried to obtain a release layer on the second impregnation layer.

[0039] Specifically, in the above steps, the drying temperature is 80-160° C., preferably 120-140° C., and the drying time is 1-2 min.

[0040] In addition, a release layer may be formed on the second impregnation layer first, and then an adhesive layer may be formed on the first impregnation layer.

[0041] The flame retardant paper tape and the preparation method thereof of the present invention will be described in detail below in conjunction with specific embodiments and comparative examples.

[0042] Example 1

[0043] Select a weight of 40g / m 2 The textured paper is used as the substrate and is immersed in an impregnation liquid (composed of a polyvinyl chloride emulsion). The impregnation liquid is fully impregnated into the interior of the paper substrate by double-sided extrusion, and then heated and dried. The drying temperature is 110°C and the drying time is 2 minutes. The first impregnation layer and the second impregnation layer are obtained on the paper substrate. The total coating amount of the first impregnation layer and the second impregnation layer is 16g / m 2 .

[0044] An adhesive (composition of acrylic pressure-sensitive adhesive and flame retardant, mass ratio of acrylic pressure-sensitive adhesive to flame retardant is 100:30) is coated on the first impregnation layer, and heated and dried at 110°C for 3 minutes to obtain an adhesive layer (the amount of the adhesive layer is 40 g / m 2 ), the flame retardant paper tape of the present invention is obtained.

[0045] Example 2

[0046] Select a weight of 40g / m 2 The adhesive is used as the substrate, and the substrate is immersed in the impregnation liquid (whose composition is polyvinyl chloride emulsion). After the impregnation liquid is fully impregnated into the interior of the paper substrate by double-sided extrusion, it is heated and dried. The drying temperature is 110°C and the drying time is 2 minutes. The first impregnation layer and the second impregnation layer are obtained on the paper substrate. The sum of the coating amounts of the first impregnation layer and the second impregnation layer is 16g / m 2 .

[0047] An adhesive (composition of acrylic pressure-sensitive adhesive and flame retardant, mass ratio of acrylic pressure-sensitive adhesive to flame retardant is 100:20) is coated on the first impregnation layer, and heated and dried at 100°C for 3 minutes to obtain an adhesive layer (the amount of the adhesive layer is 40 g / m 2 ), the flame retardant paper tape of the present invention is obtained.

[0048] Example 3

[0049] Select a weight of 40g / m 2 X is used as a substrate and immersed in an impregnation liquid (the composition of which is polyvinyl chloride emulsion and styrene butadiene emulsion, and the mass ratio of polyvinyl chloride emulsion and styrene butadiene emulsion is 80:20). After the impregnation liquid is fully impregnated into the interior of the paper substrate by double-sided extrusion, it is heated and dried at a drying temperature of 110°C and a drying time of 2 minutes to obtain a first impregnation layer and a second impregnation layer on the paper substrate. The sum of the coating amounts of the first impregnation layer and the second impregnation layer is 16 g / m 2 .

[0050] An adhesive (composed of acrylic pressure-sensitive adhesive and flame retardant, with the mass ratio of acrylic pressure-sensitive adhesive to flame retardant being 100:30) was coated on the first impregnation layer, and heated and dried at a temperature of 100°C for 3 minutes to obtain an adhesive layer (the amount of the adhesive layer was 40 g / m 2 ), the flame retardant paper tape of the present invention is obtained.

[0051] Example 4

[0052] Select a weight of 40g / m 2 The masking paper is used as the substrate and immersed in the impregnation liquid (which consists of polyvinyl chloride emulsion and styrene butadiene emulsion, and the mass ratio of polyvinyl chloride emulsion and styrene butadiene emulsion is 60:40). After the impregnation liquid is fully impregnated into the interior of the paper substrate by double-sided extrusion, it is heated and dried at a drying temperature of 110°C and a drying time of 2 minutes to obtain the first impregnation layer and the second impregnation layer on the paper substrate. The sum of the coating amounts of the first impregnation layer and the second impregnation layer is 16g / m2 .

[0053] An adhesive (composition of acrylic pressure-sensitive adhesive and flame retardant, mass ratio of acrylic pressure-sensitive adhesive: flame retardant = 100:30) was coated on the first impregnation layer, and heated and dried at 100°C for 3 min to obtain an adhesive layer (the amount of the adhesive layer was 40 g / m 2 ), the flame retardant paper tape of the present invention is obtained.

[0054] Comparative Example 1

[0055] Select a weight of 40g / m 2 The textured paper is used as the substrate and is immersed in an impregnation liquid (composed of a polyvinyl chloride emulsion). The impregnation liquid is fully impregnated into the interior of the paper substrate by double-sided extrusion, and then heated and dried. The drying temperature is 110°C and the drying time is 2 minutes. The first impregnation layer and the second impregnation layer are obtained on the paper substrate. The total coating amount of the first impregnation layer and the second impregnation layer is 16g / m 2 .

[0056] An adhesive (composed of acrylic pressure-sensitive adhesive) was coated on the first impregnation layer, and heated and dried at a temperature of 100° C. for 3 min to obtain an adhesive layer (the amount of the adhesive layer was 40 g / m 2 ), you get paper tape.

[0057] Comparative Example 2

[0058] Select a weight of 40g / m 2 The masking paper is used as the substrate and is immersed in the impregnation liquid (whose composition is styrene-butadiene emulsion). After the impregnation liquid is fully impregnated into the interior of the paper substrate by double-sided extrusion, it is heated and dried at a drying temperature of 110°C and a drying time of 2 minutes to obtain a first impregnation layer and a second impregnation layer on the paper substrate. The sum of the coating amounts of the first impregnation layer and the second impregnation layer is 16 g / m 2 .

[0059] An adhesive (composed of acrylic pressure-sensitive adhesive) was coated on the first impregnation layer, and heated and dried at a temperature of 100° C. for 3 min to obtain an adhesive layer (the amount of the adhesive layer was 40 g / m 2 ), you get paper tape.

[0060] Comparative Example 3

[0061] Select a weight of 40g / m 2 X was used as a substrate, an adhesive (whose composition was acrylic pressure-sensitive adhesive) was coated on the substrate, and heated and dried at a temperature of 100° C. for 3 min to obtain an adhesive layer (the amount of the adhesive layer was 40 g / m2 ), you get paper tape.

[0062] Comparative Example 4

[0063] Select a weight of 40g / m 2 The masking paper is used as the substrate and is immersed in the impregnation liquid (whose composition is styrene-butadiene emulsion). After the impregnation liquid is fully impregnated into the interior of the paper substrate by double-sided extrusion, it is heated and dried at a drying temperature of 110°C and a drying time of 2 minutes to obtain a first impregnation layer and a second impregnation layer on the paper substrate. The sum of the coating amounts of the first impregnation layer and the second impregnation layer is 16 g / m 2 .

[0064] An adhesive (composition of acrylic pressure-sensitive adhesive and flame retardant, mass ratio of acrylic pressure-sensitive adhesive to flame retardant is 100:30) is coated on the first impregnation layer, and heated and dried at 100°C for 3 min to obtain an adhesive layer (the amount of the adhesive layer is 40 g / m 2 ), you get paper tape.

[0065] It should be noted that the adhesive in the present embodiment and the comparative example is W-909 glue produced by Jinghua Company; the flame retardant is Doher-6002A produced by Doher Chemical; and the release agent is SUNCRYL CL 223B produced by Omnofa Company.

[0066] The flame retardant paper tapes in Examples 1 to 4 and the paper tapes in Comparative Examples 1 to 4 were subjected to flame retardancy tests according to the UL94 flame retardancy test method, and the data shown in the following table were obtained.

[0067]

[0068]

[0069] It can be seen from the data in the above table that the flame retardant paper tape of the present invention can effectively improve the flame retardant performance of the paper tape.

[0070] It will be apparent 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 considered exemplary and non-restrictive in all respects, 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.

[0071] 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 flame retardant paper tape, characterized in that: It includes a paper substrate and a first impregnation layer and a second impregnation layer formed on opposite sides of the paper substrate, the first impregnation layer and the second impregnation layer are both formed of an impregnation liquid, the impregnation liquid includes a polyvinyl chloride emulsion, an adhesive layer is provided on the first impregnation layer, the adhesive layer is formed of an adhesive, and the adhesive includes a flame retardant.

2. The flame retardant paper tape according to claim 1, characterized in that: The impregnation liquid also includes styrene butadiene emulsion; the glass transition temperature of the polyvinyl chloride emulsion and the styrene butadiene emulsion is -30 to 5°C.

3. The flame retardant paper tape according to claim 1, characterized in that: The paper substrate is any one of textured paper, Japanese paper and kraft paper, and the gram weight of the paper substrate is 30 to 80 g / m 2 .

4. The flame retardant paper tape according to claim 1, characterized in that: The sum of the impregnation amounts of the first impregnation layer and the second impregnation layer is 30% to 50% of the gram weight of the paper substrate.

5. The flame retardant paper tape according to claim 1, characterized in that: The adhesive comprises an acrylate pressure-sensitive adhesive and a phosphorus flame retardant.

6. The flame retardant paper tape according to claim 1, characterized in that: A release layer is provided on the second impregnation layer.

7. The flame retardant paper tape according to claim 6, characterized in that: The release layer is formed by coating a release agent, and the release agent is one of a long-chain alkyl compound, a copolymer or a blend, and an organic silicon release agent.

8. The flame retardant paper tape according to claim 7, characterized in that: The coating amount of the release agent is 0.5 to 3.5 g / m 2 .

9. A method for preparing the flame retardant paper tape according to any one of claims 1 to 8, characterized in that: The following steps are involved: The paper substrate is immersed in the impregnation liquid, and after the impregnation liquid fully penetrates into the interior of the paper substrate, it is heated and dried to obtain a first impregnation layer and a second impregnation layer on the paper substrate; After coating a layer of adhesive on the first impregnation layer, the layer is heated and dried to obtain an adhesive layer on the first impregnation layer.

10. The method for preparing the flame retardant paper tape according to claim 9, characterized in that: The preparation method further comprises the following steps: A layer of release agent is coated on the second impregnation layer, and then heated and dried to obtain a release layer on the second impregnation layer.

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