WO2022088468A1 - 一种可生物降解胶带及其制备方法 - Google Patents
一种可生物降解胶带及其制备方法 Download PDFInfo
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- WO2022088468A1 WO2022088468A1 PCT/CN2020/140415 CN2020140415W WO2022088468A1 WO 2022088468 A1 WO2022088468 A1 WO 2022088468A1 CN 2020140415 W CN2020140415 W CN 2020140415W WO 2022088468 A1 WO2022088468 A1 WO 2022088468A1
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- 239000002390 adhesive tape Substances 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 239000010410 layer Substances 0.000 claims abstract description 122
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 70
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims abstract description 49
- 229920002678 cellulose Polymers 0.000 claims abstract description 34
- 239000001913 cellulose Substances 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 27
- 239000002313 adhesive film Substances 0.000 claims abstract description 23
- 239000012790 adhesive layer Substances 0.000 claims abstract description 23
- 239000000853 adhesive Substances 0.000 claims abstract description 17
- 230000001070 adhesive effect Effects 0.000 claims abstract description 17
- 238000000576 coating method Methods 0.000 claims abstract description 16
- 239000011248 coating agent Substances 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000000694 effects Effects 0.000 claims abstract description 3
- 239000005871 repellent Substances 0.000 claims description 35
- 239000000758 substrate Substances 0.000 claims description 17
- 239000003292 glue Substances 0.000 claims description 14
- 239000002904 solvent Substances 0.000 claims description 14
- 238000007639 printing Methods 0.000 claims description 8
- 238000007761 roller coating Methods 0.000 claims description 5
- 239000002966 varnish Substances 0.000 claims description 4
- 238000007774 anilox coating Methods 0.000 claims description 3
- 239000004836 Glue Stick Substances 0.000 claims 1
- 125000006850 spacer group Chemical group 0.000 claims 1
- 238000003912 environmental pollution Methods 0.000 abstract description 6
- 230000004888 barrier function Effects 0.000 description 8
- 238000007789 sealing Methods 0.000 description 4
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 3
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
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- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
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- 239000000084 colloidal system Substances 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
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- 239000000017 hydrogel Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/29—Laminated material
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2433/00—Presence of (meth)acrylic polymer
Definitions
- the invention relates to the technical field of biodegradable adhesive tapes, in particular to a biodegradable adhesive tape and a preparation method thereof.
- the sealing tape market is widely used, and many industries in daily production and life are inseparable from sealing tape. Especially in today's booming logistics industry, the demand for sealing tape has surged.
- the base material of sealing tape is mainly petroleum-based polypropylene film and other materials, but the tape with polypropylene plastic film as the base material is not biodegradable after disposal, and there is a serious environmental pollution problem.
- the existing tape is not biodegradable, the carton with the tape cannot be directly beaten, and the part with the tape needs to be screened out, which not only produces a large amount of industrial waste, but also contributes to the recycling of the carton. caused great inconvenience.
- Cellulose film can be quickly degraded by microorganisms in the soil, will not cause secondary pollution to the environment, and has excellent environmental performance. In addition, it also has excellent tensile strength and stretch type, does not generate static electricity, and has excellent printing and composite performance. , High temperature resistance, no deformation at 190 °C high temperature. However, due to the defects of cellulose film being easily deformed when exposed to water, obviously softening, and then decreasing in toughness, its application in adhesive tapes with water-based pressure-sensitive adhesives as adhesive layers is limited.
- the purpose of the present invention is to overcome the above-mentioned deficiencies, and provides a biodegradable adhesive tape, which greatly improves the biodegradability of the adhesive tape and reduces environmental pollution to the greatest extent. A large amount of industrial waste is generated, thereby avoiding waste of resources; in addition, the present invention also provides a preparation method of a biodegradable adhesive tape.
- the first aspect of the present invention provides a biodegradable adhesive tape, which includes a release layer, a substrate layer, a water barrier film layer, and an adhesive layer that are stacked in sequence; wherein, the substrate layer is A cellulose film layer, the water-repellent adhesive film layer has a water-repellent effect, the adhesive layer is prepared from a water-based pressure-sensitive adhesive, and the water-repellent adhesive film layer is prepared from a water-repellent adhesive.
- the cellulose film has biodegradability, and the use of the cellulose film layer as the substrate layer greatly improves the biodegradability of the adhesive tape in the present invention; in addition, the cellulose film also has excellent tensile strength, stretchability High temperature resistance and high temperature deformation resistance, and excellent printing and lamination performance; by setting a water barrier layer between the cellulose film layer and the adhesive layer, it can avoid direct contact between the water in the water-based pressure-sensitive adhesive and the cellulose film, resulting in cellulose The film layer absorbs water and softens, so that the tape becomes soft and wrinkled and cannot be curled and rolled.
- the water-repellent glue is any one of solvent-based oil glue, solvent-based ink varnish, and solvent-based rubber.
- solvent-based oil glue and solvent-based rubber can further increase the viscosity of the tape.
- the water-based pressure-sensitive adhesive is a biodegradable water-based pressure-sensitive adhesive.
- the release layer is a biodegradable release layer.
- the second aspect of the present invention provides the above-mentioned preparation method of a biodegradable adhesive tape, comprising the following steps: performing release treatment on one side of the substrate layer to form a release layer, and coating a layer of water barrier glue on the other side of the substrate layer , after drying, a water-repellent adhesive film layer is formed, and then a layer of water-based pressure-sensitive adhesive is coated on the side of the water-repellent adhesive film layer away from the base material layer, and dried to form an adhesive layer, that is, the biological Degradable tape.
- the side of the substrate layer facing the water barrier film layer is further printed with characters and/or patterns, and the characters and/or patterns to be printed are printed on the substrate layer according to the design, and then the water barrier is applied glue.
- the water-repellent adhesive is coated on the base material layer by any one of anilox roller coating, printing plate coating, wire bar coating, and glue roller coating.
- a biodegradable adhesive tape in the present invention greatly improves the biodegradability of the adhesive tape and reduces environmental pollution; wherein, the cellulose film has biodegradability, and the cellulose film layer is used as the base material layer in the present invention, The biodegradability of the adhesive tape in the present invention is greatly improved.
- the release layer as a biodegradable release layer and the water-based pressure-sensitive adhesive as a biodegradable water-based pressure-sensitive adhesive
- the adhesive tape in the present invention is further improved. The degree of biodegradability, thereby reducing environmental pollution to a greater extent.
- the preparation method of a biodegradable adhesive tape in the present invention has the advantages of simple process and high efficiency.
- the direct contact with the cellulose film due to the moisture in the water-based pressure-sensitive adhesive is avoided. It causes the cellulose film layer to absorb water and soften, so that the tape becomes soft and wrinkled and cannot be curled.
- FIG. 1 is a schematic structural diagram of a biodegradable adhesive tape of the present invention.
- Release layer 1 base material layer 2 , water-repellent adhesive film layer 3 , adhesive layer 4 .
- This embodiment discloses a biodegradable adhesive tape, which includes a release layer 1, a substrate layer 2, a water-repellent adhesive film layer 3, and an adhesive layer 4 that are stacked in sequence; wherein, the substrate layer 2 is cellulose Film layer, the water-repellent adhesive film layer 3 has the function of water-repellent, the adhesive layer 4 is made of water-based pressure-sensitive adhesive, and the water-repellent adhesive film layer 3 is made of water-repellent adhesive.
- the cellulose film has biodegradability, and the use of the cellulose film layer as the substrate layer 2 greatly improves the biodegradability of the biodegradable adhesive tape in the present invention.
- the cellulose film also has excellent resistance to Tensile strength, flexibility and high temperature deformation resistance, and excellent printing and laminating performance; by setting a water barrier layer between the cellulose film layer and the adhesive layer 4, it can avoid the direct contact between the water in the water-based pressure-sensitive adhesive and the cellulose film. Contact, causing the cellulose film layer to absorb water and soften, making the tape soft and wrinkled and unable to curl and roll up.
- the water-repellent glue is any one of solvent-based oil glue, solvent-based ink varnish, and solvent-based rubber. It should be noted that the selection of the water barrier glue in this embodiment is not limited to the above selection, and those skilled in the art can make reasonable selections according to common knowledge, conventional means, prior art and conventional technical means in the art. In addition, solvent-based oil and solvent-based rubber can further increase the viscosity of the tape.
- the release layer 1 in this embodiment is a biodegradable release layer
- the water-based pressure-sensitive adhesive in this embodiment is a biodegradable water-based pressure-sensitive adhesive
- the water-based pressure-sensitive adhesive in this embodiment is a biodegradable acrylic water-based pressure-sensitive adhesive
- the water-based pressure-sensitive adhesive in this embodiment can also be a biodegradable water-based pressure-sensitive adhesive produced by Shanghai Huzheng Industrial Co., Ltd.
- the water-based acrylate pressure-sensitive adhesive disclosed in the Chinese invention patent with application number CN201910265014.9 can also be used for the preparation of the adhesive layer in this application; it should be noted that the water-based pressure-sensitive adhesive in this implementation is not limited to For the above selection, those skilled in the art can reasonably select the specific types of biodegradable water-based pressure-sensitive adhesives according to actual needs.
- the water-based pressure-sensitive adhesive in the present embodiment can also be mixed with the water-based pressure-sensitive adhesive with the trade mark of 691 produced by Jiangsu Guojiao New Material Co., Ltd. and the rosin resin with the model of 881 produced by Shanghai Sangjing Chemical Co., Ltd.,
- the water-based pressure-sensitive adhesive obtained by the above method complies with the national environmental protection policy of "oil-to-water", and belongs to the environment-friendly water-based colloid. While ensuring the viscosity, the degradation degree of the biodegradable adhesive in the present invention is also improved; wherein, the grade of 691
- the mass ratio of water-based pressure-sensitive adhesive and rosin resin type 881 is 1:0.15
- the biodegradable release layer in this embodiment is prepared from a silicon-free release agent produced by Hangzhou Juge Biotechnology Co., Ltd.; it should be noted that the biodegradable release layer in this embodiment is not limited to Based on the above selection, those skilled in the art can reasonably select the specific types of the biodegradable release layer according to actual needs.
- the solvent-based oil glue with model BH-006 produced by Changzhou Shengbang New Material Technology Co., Ltd.
- the OPP special tape alcohol-soluble ink varnish produced by Jieyang Kaimedi Printing Materials Co., Ltd. can all be used to prepare the separator in the present invention.
- the present embodiment also provides a method for preparing the above-mentioned biodegradable adhesive tape, which includes the following steps: performing a release treatment on one side of the base material layer 2 to form a release layer 1 , and coating the other side of the base material layer 2 A layer of water-repellent adhesive is clothed, dried to form a water-repellent adhesive film layer 3, and then a layer of water-based pressure-sensitive adhesive is coated on the side of the water-repellent adhesive film layer 3 away from the base material layer 2, and dried to form an adhesive
- the adhesive layer is the biodegradable adhesive tape.
- the water-repellent adhesive film layer 3 avoids the direct contact of the water in the water-based pressure-sensitive adhesive with the cellulose film, which causes the cellulose film layer to absorb water and soften, so that the tape becomes soft, wrinkled, and cannot be curled.
- the side of the base material layer 2 facing the water-repellent adhesive film layer 3 is also printed with text and/or patterns. According to the design, the to-be-printed text and/or pattern is printed on the base material layer 2 and then coated Waterproof glue.
- the water-repellent adhesive in this embodiment is applied to the base material layer 2 by any one of anilox roller coating, printing plate coating, wire bar coating, and glue roller coating. superior. It should be noted that the coating of the water-repellent adhesive in this embodiment is not limited to the above-mentioned selection, and the coating processes for adhesives in the prior art are all applicable to the present invention.
- the water-based pressure-sensitive adhesive when it is necessary to coat water-based pressure-sensitive adhesives on substrates with water-absorbing properties such as paper, the water-based pressure-sensitive adhesive can also be coated on the surface by coating the water-repellent adhesive film layer 3 to avoid water-absorbing pressure-sensitive adhesives.
- the characteristics of the substrate after water absorption and softening affect the final product performance.
- the biodegradable adhesive tape in this embodiment has biodegradability in the base material layer 2 , the release layer 1 and the adhesive layer 4 . It works synergistically with the adhesive layer 4 to greatly improve the biodegradability of the tape, thereby minimizing environmental pollution.
- This embodiment discloses a biodegradable adhesive tape, which includes a release layer 1, a substrate layer 2, and an adhesive layer 4 that are stacked in sequence; wherein, the substrate layer 2 is a cellulose film layer, and the adhesive layer is Layer 4 is prepared from an aqueous pressure sensitive adhesive.
- the cellulose film has biodegradability, and the use of the cellulose film layer as the base material layer 2 greatly improves the biodegradability of the cellulose film in this embodiment.
- the cellulose film also has excellent tensile strength , stretchability and high temperature deformation resistance, and excellent printing and lamination performance.
- the release layer 1 in this embodiment is a biodegradable release layer
- the water-based pressure-sensitive adhesive in this embodiment is a biodegradable water-based pressure-sensitive adhesive
- the water-based pressure-sensitive adhesive in this embodiment is a biodegradable acrylic water-based pressure-sensitive adhesive
- the water-based pressure-sensitive adhesive in this embodiment can also be a biodegradable water-based pressure-sensitive adhesive produced by Shanghai Huzheng Industrial Co., Ltd.
- the water-based acrylate pressure-sensitive adhesive disclosed in the Chinese invention patent with application number CN201910265014.9 can also be used for the preparation of the adhesive layer in this application; it should be noted that the water-based pressure-sensitive adhesive in this implementation is not limited to For the above selection, those skilled in the art can reasonably select the specific types of biodegradable water-based pressure-sensitive adhesives according to actual needs.
- the water-based pressure-sensitive adhesive in the present embodiment can also be mixed with the water-based pressure-sensitive adhesive with the trade mark of 691 produced by Jiangsu Guojiao New Material Co., Ltd. and the rosin resin with the model of 881 produced by Shanghai Sangjing Chemical Co., Ltd.,
- the water-based pressure-sensitive adhesive obtained by the above method complies with the national environmental protection policy of "oil-to-water", belongs to the environment-friendly water-based colloid, and improves the degradation degree of the biodegradable adhesive in the present invention while ensuring the viscosity.
- the biodegradable release layer in this embodiment is prepared from a silicon-free release agent produced by Hangzhou Juge Biotechnology Co., Ltd.; it should be noted that the biodegradable release layer in this embodiment is not limited to Based on the above selection, those skilled in the art can reasonably select the specific types of the biodegradable release layer according to actual needs.
- the present embodiment also provides a method for preparing the above-mentioned biodegradable adhesive tape, which includes the following steps: performing a release treatment on one side of the base material layer 2 to form a release layer 1 , and coating the other side of the base material layer 2 A layer of water-based pressure-sensitive adhesive is clothed and dried in an oven to form an adhesive layer to obtain the biodegradable adhesive tape.
- the side of the base material layer 2 facing the adhesive layer 4 is also printed with characters and/or patterns. According to the design, the characters and/or patterns to be printed are printed on the base material layer 2 and then the water-based pressure is applied. sensitive glue.
- the biodegradable adhesive tape in this embodiment differs in structure in that the biodegradable adhesive tape in this embodiment is not provided with a water-repellent adhesive film layer. Moisture is absorbed by the cellulose film layer, resulting in deformation of the base material layer 2 in the biodegradable tape prepared by the above method, which is not conducive to the subsequent winding process of the tape and reduces the yield.
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- Organic Chemistry (AREA)
- Adhesive Tapes (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Laminated Bodies (AREA)
Abstract
本发明公开了一种可生物降解胶带及其制备方法，所述可生物降解胶带包括依次层叠设置的离型层、基材层、隔水胶膜层、胶粘层；其中，所述基材层为纤维素膜层，所述隔水胶膜层具有隔水作用，所述胶粘层由水性压敏胶制备而成，所述隔水胶膜层由隔水胶制备而成。本发明中的可生物降解胶带，大大提高了胶带的生物降解度，最大程度的降低了环境污染；本发明中的可生物降解胶带的制备方法，工艺简单，高效，通过在纤维素膜层上涂布隔水层，避免因水性压敏胶中的水分与纤维素膜直接接触，导致纤维素膜层吸水变软使得胶带变软打皱无法卷曲收卷问题的发生。
Description
本发明涉及可生物降解胶带技术领域，具体涉及一种可生物降解胶带及其制备方法。
封箱胶带市场应用广泛，日常生产生活中很多行业都离不开封箱胶带，特别是在物流行业蓬勃发展的今天，封箱胶带需求量激增。目前国内市场上，封箱胶带的基材主要是石油基聚丙烯膜等材质，但是以聚丙烯塑料膜为基材的胶带在废弃后不可生物降解，存在着严重的环境污染问题。此外，由于现有胶带不具备生物降解性，使得粘有胶带的纸箱不能直接进行打浆操作，需要将粘有胶带的部分筛选出来，不仅会产生大量的工业垃圾，而且这也给纸箱的回收工作带来了极大的不便。
纤维素膜在土壤中能够被微生物等快速降解，对环境不会造成二次污染，具有卓越的环保性能，此外其还具有优良的抗张力强度和伸缩型，不产生静电，印刷及复合性能卓越，耐高温，在190℃的高温下不发生变形等特点。但由于纤维素膜具有遇水易发生形变、变软明显、韧性进而降低的缺陷，限制了其在以水性压敏胶作为胶粘层的胶带中应用。
发明内容
本发明的目的是克服上述不足，提供了一种可生物降解胶带，大大提高了胶带的生物降解度，最大程度的降低了环境污染，其应用于封箱胶带时可与纸箱一起重复利用，避免了大量工业垃圾的产生，进而避免了资源浪费；此外，本发明还提供了一种可生物降解胶带的制备方法。
为实现上述目的，本发明第一方面提供了一种可生物降解胶带，包括依次层叠设置的离型层、基材层、隔水胶膜层、胶粘层；其中，所述基材层为纤维素膜层，所述隔水胶膜层具有隔水作用，所述胶粘层由水性压敏胶制备而成，所述隔水胶膜层由隔水胶制备而成。
通过采用上述技术方案，纤维素膜具有生物降解性，采用纤维素膜层作为基材层大大提高了本发明中的胶带的生物降解度；此外，纤维素膜还具有优异的抗张力强度、伸缩性及耐高温变形，且印刷和复合性能卓越；通过在纤维素膜层和胶粘层之间设置隔水层，能够避免因水性压敏胶中的水分与纤维素膜直接接触，导致纤维素膜层吸水变软使得胶带变软打皱无法卷曲收卷问题的发生。
优选地，所述隔水胶为溶剂型油胶、溶剂型油墨调墨油、溶剂型橡胶中的任意一种。
其中，溶剂型油胶和溶剂型橡胶还能够进一步增加胶带的粘度。
优选地，所述水性压敏胶为可生物降解水性压敏胶。
优选地，所述离型层为可生物降解离型层。
本发明第二方面提供了上述一种可生物降解胶带的制备方法包括以下步骤：对基材层的一面进行离型处理形成离型层，在基材层的另一面涂布一层隔水胶，烘干后形成隔水胶膜层，然后在隔水胶膜层背离所述基材层的一侧涂布一层水性压敏胶，烘干，形成胶粘层，即得所述可生物降解胶带。
优选地，所述基材层朝向所述隔水胶膜层的一侧还印刷有文字和/或图案，根据设计将待印刷文字和/或图案印刷于基材层上后再涂布隔水胶。
优选地，所述隔水胶通过网纹棍涂布、印刷版涂布、线棒涂布、涂胶棍涂布中的任意一种涂布方式涂布于所述基材层上。
与现有技术相比，本发明的有益效果在于：
1、本发明中的一种可生物降解胶带，大大提高了胶带的生物降解度，减少了环境污染；其中，纤维素膜具有生物降解性，本发明中采用纤维素膜层作为基材层，大大提高了本发明中胶带的生物降解度，此外，通过将离型层设置为可生物降解离型层、水性压敏胶设置为可生物降解水性压敏胶，进一步提高了本发明中胶带的生物降解度，进而更大程度的降低了环境污染。
2、本发明中的一种可生物降解胶带的制备方法，工艺简单，高效，通过在纤维素膜层上涂布隔水层，避免因水性压敏胶中的水分与纤维素膜直接接触，导致纤维素膜层吸水变软使得胶带变软打皱无法卷曲收卷问题的发生。
图1为本发明一种可生物降解胶带的结构示意图。
各标记与部件名称对应关系如下：
离型层1、基材层2、隔水胶膜层3、胶粘层4。
为了使发明实现的技术手段、为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合具体实施例，对本发明中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。
实施例1
本实施例公开了一种可生物降解胶带，包括依次层叠设置的离型层1、基材层2、隔水胶膜层3、胶粘层4；其中，所述基材层2为纤维素膜层，所述隔水胶膜层3具有隔水 作用，所述胶粘层4由水性压敏胶制备而成，所述隔水胶膜层3由隔水胶制备而成。
具体地说，纤维素膜具有生物降解性，采用纤维素膜层作为基材层2，使得本发明中的可生物降解的胶带的生物降解度大大提高，此外，纤维素膜还具有优异的抗张力强度、伸缩性及耐高温变形，且印刷和复合性能卓越；通过在纤维素膜层和胶粘层4之间设置隔水层，能够避免因水性压敏胶中的水分与纤维素膜直接接触，导致纤维素膜层吸水变软使得胶带变软打皱无法卷曲收卷问题的发生。
进一步地，隔水胶为溶剂型油胶、溶剂型油墨调墨油、溶剂型橡胶中的任意一种。需要注意地，本实施例中的隔水胶的选择并不局限于上述选择，本领域技术人员可以根据本领域公知常识、惯用手段、现有技术及常规技术手段进行合理选择。另外，溶剂型油胶和溶剂型橡胶还能够进一步增加胶带的粘度。
其中，本实施例中的离型层1为可生物降解离型层，本实施例中的水性压敏胶为可生物降解水性压敏胶。
其中，本实施例中的水性压敏胶为可生物降解的亚克力水性压敏胶粘剂，本实施例中的水性压敏胶还可为上海沪正实业有限公司生产的可生物降解水性压敏胶，申请号为CN201910265014.9的中国发明专利中所公开的水性丙烯酸酯压敏胶也可用于本申请中的胶粘层的制备；需要注意地是，本实施中的水性压敏胶并不局限于上述选择，本领域技术人员可以根据实际需求对可生物降解水性压敏胶的具体种类进行合理选择。
另外，本实施例中的水性压敏胶还可以由江苏国胶新材料有限公司生产的牌号为691的水性压敏胶和上海桑井化工有限公司生产的型号为881的松香树脂混合而成，通过上述方法所得水性压敏胶符合国家“油改水”的环保政策，属于环保型水性胶体，在保证粘度的同时也提高了本发明中可生物降解胶的降解度；其中，牌号为691的水性压敏胶和型号为881的松香树脂的质量比为1：0.15
其中，本实施例中的可生物降解离型层由杭州聚格生物科技有限公司生产的无硅离型剂制备而成；需要注意地是，本实施中的可生物降解离型层并不局限于上述选择，本领域技术人员可以根据实际需求对可生物降解离型层的具体种类进行合理选择。
其中，常州盛邦新材料科技有限公司生产的型号为BH-006的溶剂型油胶、揭阳市凯美迪印刷材料有限公司生产的OPP专用胶带醇溶油墨调墨油均可用于制备本发明中的隔水胶膜层3。
此外，本实施例中还提供了上述一种可生物降解胶带的制备方法，包括以下步骤：对基材层2的一面进行离型处理形成离型层1，在基材层2的另一面涂布一层隔水胶，烘干后形成隔水胶膜层3，然后在隔水胶膜层3背离所述基材层2的一侧涂布一层水性压敏胶，烘干，形成胶粘层，即得所述可生物降解胶带。通过隔水胶膜层3避免了水性压敏胶中的 水分与纤维素膜直接接触，导致纤维素膜层吸水变软使得胶带变软打皱无法卷曲收卷问题的发生。
另外，所述基材层2朝向所述隔水胶膜层3的一侧还印刷有文字和/或图案，根据设计将待印刷文字和/或图案印刷于基材层2上后再涂布隔水胶。
优选地，本实施例中的隔水胶通过网纹棍涂布、印刷版涂布、线棒涂布、涂胶棍涂布中的任意一种涂布方式涂布于所述基材层2上。需要注意地是，本实施例中的隔水胶的涂布并不局限于上述选择，现有技术中用于胶粘剂的涂胶工艺均适用于本发明。
现有技术中需要在纸张等具有吸水特性的基材上涂布水性压敏胶时，可同样通过采用在其表面涂布隔水胶膜层3后再涂布水性压敏胶，避免具有吸水特性的基材吸水变软后影响最终产品性能。
本实施例中的可生物降解胶带与现有技术中的胶带相比，基材层2、离型层1及胶粘层4均具有可生物降解性，通过基材层1、离型层1和胶粘层4协同作用，大大提高了胶带的生物降解度，进而最大程度的降低了环境污染。
实施例2
本实施例公开了一种可生物降解胶带，包括依次层叠设置的离型层1、基材层2、胶粘层4；其中，所述基材层2为纤维素膜层，所述胶粘层4由水性压敏胶制备而成。
具体地说，纤维素膜具有生物降解性，采用纤维素膜层作为基材层2，大大提高了本实施例中纤维素膜的生物降解度，此外，纤维素膜还具有优异的抗张力强度、伸缩性及耐高温变形，且印刷和复合性能卓越。
其中，本实施例中的离型层1为可生物降解离型层，本实施例中的水性压敏胶为可生物降解水性压敏胶。
其中，本实施例中的水性压敏胶为可生物降解的亚克力水性压敏胶粘剂，本实施例中的水性压敏胶还可为上海沪正实业有限公司生产的可生物降解水性压敏胶，申请号为CN201910265014.9的中国发明专利中所公开的水性丙烯酸酯压敏胶也可用于本申请中的胶粘层的制备；需要注意地是，本实施中的水性压敏胶并不局限于上述选择，本领域技术人员可以根据实际需求对可生物降解水性压敏胶的具体种类进行合理选择。
另外，本实施例中的水性压敏胶还可以由江苏国胶新材料有限公司生产的牌号为691的水性压敏胶和上海桑井化工有限公司生产的型号为881的松香树脂混合而成，通过上述方法所得水性压敏胶符合国家“油改水”的环保政策，属于环保型水性胶体，在保证粘度的同时也提高了本发明中可生物降解胶的降解度。
其中，本实施例中的可生物降解离型层由杭州聚格生物科技有限公司生产的无硅离型 剂制备而成；需要注意地是，本实施中的可生物降解离型层并不局限于上述选择，本领域技术人员可以根据实际需求对可生物降解离型层的具体种类进行合理选择。此外，本实施例中还提供了上述一种可生物降解胶带的制备方法，包括以下步骤：对基材层2的一面进行离型处理形成离型层1，在基材层2的另一面涂布一层水性压敏胶，进入烘箱内烘干，形成胶粘层，即得所述可生物降解胶带。
另外，所述基材层2朝向所述胶粘层4的一侧还印刷有文字和/或图案，根据设计将待印刷文字和/或图案印刷于基材层2上后再涂布水性压敏胶。
本实施例中可生物降解胶带与实施例1中的可生物降解胶带相比，结构区别在于：本实施例中的可生物降解胶带未设置隔水胶膜层，由于水性压敏胶中的部分水分被纤维素膜层吸附，导致通过上述方法制备所得可生物降解胶带中的基材层2出现变形，不利于胶带后续收卷工艺且降低了成品率。
尽管已经示出和描述了本发明的实施例，对于本领域的普通技术人员而言，可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型，本发明的范围由所附权利要求及其等同物限定。
Claims (7)
- 一种可生物降解胶带，其特征在于，包括依次层叠设置的离型层、基材层、隔水胶膜层、胶粘层；其中，所述基材层为纤维素膜层，所述隔水胶膜层具有隔水作用，所述胶粘层由水性压敏胶制备而成，所述隔水胶膜层由隔水胶制备而成。
- 如权利要求1所述的一种可生物降解胶带，其特征在于，所述隔水胶为溶剂型油胶、溶剂型油墨调墨油、溶剂型橡胶中的任意一种。
- 如权利要求1所述的一种可生物降解胶带，其特征在于，所述水性压敏胶为可生物降解水性压敏胶。
- 如权利要求1所述的一种可生物降解胶带，其特征在于，所述离型层为可生物降解离型层。
- 一种如权利要求1-4任一项所述的可生物降解胶带的制备方法，其特征在于，包括以下步骤：对基材层的一面进行离型处理形成离型层，在基材层的另一面涂布一层隔水胶，烘干后形成隔水胶膜层，然后在隔水胶膜层背离所述基材层的一侧涂布一层水性压敏胶，烘干，形成胶粘层，即得所述可生物降解胶带。
- 如权利要求5所述的一种可生物降解胶带的制备方法，其特征在于，所述基材层朝向所述隔水胶膜层的一侧还印刷有文字和/或图案，根据设计将待印刷文字和/或图案印刷于基材层上后再涂布隔水胶。
- 如权利要求5所述的一种可生物降解胶带的制备方法，其特征在于，所述隔水胶通过网纹棍涂布、印刷版涂布、线棒涂布、涂胶棍涂布中的任意一种涂布方式涂布于所述基材层上。
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