CN115109538A - Pressure-sensitive adhesive tape - Google Patents
Pressure-sensitive adhesive tape Download PDFInfo
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- CN115109538A CN115109538A CN202110472894.4A CN202110472894A CN115109538A CN 115109538 A CN115109538 A CN 115109538A CN 202110472894 A CN202110472894 A CN 202110472894A CN 115109538 A CN115109538 A CN 115109538A
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- Prior art keywords
- sensitive adhesive
- pressure
- adhesive tape
- tackifier
- weight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000004820 Pressure-sensitive adhesive Substances 0.000 title claims abstract description 129
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000002245 particle Substances 0.000 claims abstract description 34
- 239000000758 substrate Substances 0.000 claims abstract description 14
- 244000043261 Hevea brasiliensis Species 0.000 claims abstract description 4
- 229920003052 natural elastomer Polymers 0.000 claims abstract description 4
- 229920001194 natural rubber Polymers 0.000 claims abstract description 4
- 229920003051 synthetic elastomer Polymers 0.000 claims abstract description 4
- 239000005061 synthetic rubber Substances 0.000 claims abstract description 4
- 239000003208 petroleum Substances 0.000 claims description 30
- 239000011347 resin Substances 0.000 claims description 30
- 229920005989 resin Polymers 0.000 claims description 30
- 239000004094 surface-active agent Substances 0.000 claims description 23
- 239000002563 ionic surfactant Substances 0.000 claims description 11
- 239000008367 deionised water Substances 0.000 claims description 9
- 229910021641 deionized water Inorganic materials 0.000 claims description 9
- 239000002736 nonionic surfactant Substances 0.000 claims description 9
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 8
- 239000003381 stabilizer Substances 0.000 claims description 8
- 235000019333 sodium laurylsulphate Nutrition 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 5
- -1 polyoxyethylene Polymers 0.000 claims description 5
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 3
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 3
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 13
- 239000003960 organic solvent Substances 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 description 9
- 238000004945 emulsification Methods 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 6
- 238000013112 stability test Methods 0.000 description 6
- 238000003860 storage Methods 0.000 description 6
- 239000002318 adhesion promoter Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 239000004594 Masterbatch (MB) Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000227 grinding Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 238000010561 standard procedure Methods 0.000 description 3
- 238000000576 coating method Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 238000001238 wet grinding Methods 0.000 description 2
- 244000212127 Gliricidia sepium Species 0.000 description 1
- 235000009664 Gliricidia sepium Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012430 stability testing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- 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]
- C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/383—Natural or synthetic rubber
-
- 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
- C09J107/00—Adhesives based on natural rubber
-
- 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
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
-
- 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
- C09J121/00—Adhesives based on unspecified rubbers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
-
- 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
- C09J2407/00—Presence of natural rubber
-
- 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
- C09J2421/00—Presence of unspecified rubber
Abstract
A pressure-sensitive adhesive tape comprises a substrate and a water-based pressure-sensitive adhesive on the substrate. The water-based pressure-sensitive adhesive comprises 20 to 30 parts by weight of natural rubber, 18 to 28 parts by weight of synthetic rubber and 50 to 60 parts by weight of tackifier, wherein the particle size (D90) of the tackifier is between 100nm and 500 nm. The tackifier provided by the disclosure has a low particle size, so that the water-based pressure-sensitive adhesive has high stability and good adhesiveness, and organic solvents are prevented from being used in the process of manufacturing the pressure-sensitive adhesive tape, so that the harm to the environment or human body is reduced.
Description
Technical Field
The present disclosure relates to pressure sensitive adhesive tapes, and more particularly to pressure sensitive adhesive tapes having a water-based pressure sensitive adhesive.
Background
The pressure-sensitive adhesive tape has different adhesive properties by adjusting the components of the pressure-sensitive adhesive, and thus can be applied to various industries such as textiles, electronics, automobiles, and the like. However, the manufacturing process of pressure sensitive adhesives often uses a large amount of volatile organic solvents, which causes environmental pollution and human harm. Therefore, it is an important issue to provide a pressure sensitive adhesive having high adhesion without using an organic solvent.
Disclosure of Invention
The present disclosure provides a pressure-sensitive adhesive tape, which includes a water-based pressure-sensitive adhesive, so that the pressure-sensitive adhesive tape has good adhesiveness.
According to some embodiments of the present disclosure, a pressure sensitive adhesive tape includes a substrate and a water-based pressure sensitive adhesive on the substrate. The water-based pressure-sensitive adhesive comprises 20 to 30 parts by weight of natural rubber, 18 to 28 parts by weight of synthetic rubber and 50 to 60 parts by weight of tackifier, wherein the particle size (D90) of the tackifier is between 100nm and 500 nm.
In some embodiments, the viscosifier is prepared by including the following agents: 45 to 50 parts by weight of deionized water, 45 to 50 parts by weight of petroleum-based resin, 0.5 to 6 parts by weight of a surfactant, and 0.5 to 2 parts by weight of a stabilizer.
In some embodiments, the petroleum-based resin has a particle size (D90) between 700nm and 1000 nm.
In some embodiments, the surfactant has a hydrophilic-lipophilic balance of between 20 and 40.
In some embodiments, the surfactant is an ionic surfactant, which includes sodium lauryl sulfate.
In some embodiments, the surfactant comprises an ionic surfactant and a nonionic surfactant, and the weight ratio of the ionic surfactant to the nonionic surfactant is between 0.25 and 1.6.
In some embodiments, the nonionic surfactant comprises polyoxyethylene.
In some embodiments, the stabilizing agent comprises polyvinylpyrrolidone.
In some embodiments, the solids content of the aqueous pressure sensitive adhesive is between 50 wt% and 60 wt%.
In some embodiments, the pH of the aqueous pressure sensitive adhesive is between 9 and 11.
According to the above embodiments of the present disclosure, since the aqueous pressure-sensitive adhesive of the pressure-sensitive adhesive tape includes the tackifier having a low particle size and a uniform particle size, the aqueous pressure-sensitive adhesive has high stability and can provide good adhesiveness to the pressure-sensitive adhesive tape. On the other hand, the water-based pressure-sensitive adhesive is a non-organic solvent type pressure-sensitive adhesive, so that the use of an organic solvent in the production process of the pressure-sensitive adhesive tape is avoided, and the harm to the environment or human body is reduced.
Detailed Description
The following disclosure provides many different embodiments, or examples, for implementing different features of the claimed subject matter. Specific examples of values, acts, materials, etc., are described below to simplify the present disclosure. These are, of course, merely examples and are not intended to be limiting.
The present disclosure provides a pressure-sensitive adhesive tape comprising a substrate and a water-based pressure-sensitive adhesive on the substrate, wherein the water-based pressure-sensitive adhesive comprises a tackifier. Since the tackifier has a low and uniform particle diameter, the aqueous pressure-sensitive adhesive may have high stability and provide good adhesiveness of the pressure-sensitive adhesive tape.
The disclosed pressure-sensitive adhesive tape includes a substrate and a water-based pressure-sensitive adhesive on the substrate, wherein the water-based pressure-sensitive adhesive includes 20 to 30 parts by weight of natural rubber, 18 to 28 parts by weight of synthetic rubber, and 50 to 60 parts by weight of a tackifier. In detail, the particle size (D90) of the tackifier in the water-based pressure-sensitive adhesive is between 100nm and 500 nm. Because the tackifier in the water-based pressure-sensitive adhesive has uniform low particle size, the tackifier can permeate into pores between rubber molecules or between the rubber molecules and a base material, thereby increasing the mutual dissolving effect among the components of the water-based pressure-sensitive adhesive. Therefore, the tackifier can increase the stability of the aqueous pressure-sensitive adhesive and increase the adhesiveness of the pressure-sensitive adhesive tape.
In some embodiments, the substrate of the pressure sensitive adhesive tape may comprise a smooth and flexible material, thereby providing good adhesion of the pressure sensitive adhesive tape. For example, the substrate may be a polyvinyl chloride film, so that the pressure sensitive adhesive tape can conform to the surface of the adherend when adhered to the adherend, and increase the adhesion area between the two.
In some embodiments, the solids content of the aqueous pressure-sensitive adhesive can be between 50 wt% and 60 wt%, thereby providing suitable viscosity for the aqueous pressure-sensitive adhesive and good adhesion of the pressure-sensitive adhesive tape. For example, the viscosity of the aqueous pressure sensitive adhesive may be between 400cP and 800 cP. When the viscosity of the aqueous pressure-sensitive adhesive is within this range, it has suitable fluidity so that the aqueous pressure-sensitive adhesive can be coated on a substrate to form a uniform adhesive surface while maintaining good adhesiveness of the pressure-sensitive adhesive tape. Specifically, if the viscosity of the aqueous pressure-sensitive adhesive is less than 400cP, the aqueous pressure-sensitive adhesive may be too thin to provide adhesiveness of the pressure-sensitive adhesive tape; if the viscosity of the water-based pressure sensitive adhesive is greater than 800cP, the coating difficulty is easily increased, which is not favorable for the coating process. In some embodiments, the pH of the aqueous pressure-sensitive adhesive may be between 9 and 11, thereby avoiding the aggregation of the tackifier in the aqueous pressure-sensitive adhesive. In other words, when the pH of the aqueous pressure-sensitive adhesive is in this range, the tackifier can maintain a low particle size state, thereby increasing the stability of the aqueous pressure-sensitive adhesive.
In some embodiments, the tackifier may be prepared by including the following agents: 45 to 50 parts by weight of deionized water, 45 to 50 parts by weight of petroleum-based resin, 0.5 to 6 parts by weight of a surfactant, and 0.5 to 2 parts by weight of a stabilizer. In some embodiments, the agent that makes up the tackifier may include the same parts by weight of petroleum-based resin and deionized water. Since the agent for forming the tackifier comprises a high proportion of deionized water, the tackifier formed therefrom has a high water content, thereby increasing the diffusing ability of the water-based pressure-sensitive adhesive to the substrate and providing a good adhesiveness of the pressure-sensitive adhesive tape. On the other hand, the agent for making the tackifier has water as a main solvent and includes a small amount of a surfactant and a stabilizer, thereby avoiding the addition of an organic solvent or a large amount of additives.
In some embodiments, the tackifier may be prepared by a direct emulsification process of deionized water, petroleum-based resin, and surfactant. Specifically, the direct emulsification process can use deionized water as the main solvent, and use a surfactant to complete the emulsification process of deionized water and petroleum resin, thereby avoiding the addition of additional organic solvent or dispersant. For example, deionized water, petroleum resin and surfactant may be added to a high speed homogenizer and homogenized at 6000rpm to 7000rpm for 10 minutes to 30 minutes to emulsify and form an emulsion based on petroleum resin. In some embodiments, the tackifier may be prepared by adding a stabilizer to the emulsion resulting from the direct emulsification process, such that the mutual solubility between the tackifier components is increased. Therefore, the tackifier has high stability, thereby increasing the stability of the aqueous pressure-sensitive adhesive. In some embodiments, the stabilizing agent may comprise polyvinylpyrrolidone.
In some embodiments, the petroleum-based resin (e.g., C5 petroleum resin or C9 petroleum resin, etc.) may have a low particle size such that the petroleum-based resin may be directly emulsified into a tackifier. Specifically, the particle size (D90) of the petroleum resin can be between 700nm and 1000nm, so that the particle size of the petroleum resin is small enough to form the tackifier by using a direct emulsification process. On the other hand, since the petroleum-based resin has a uniform low particle size, the tackifier prepared therefrom also has a uniform low particle size, thereby increasing the stability of the tackifier and providing a pressure-sensitive adhesive tape with good adhesiveness.
In some embodiments, the preparation of the petroleum-based resin may include subjecting the petroleum-based resin master batch to a wet grinding process to form the petroleum-based resin. Specifically, the petroleum resin master batch can be subjected to a wet grinding process in an aqueous solution to form the petroleum resin, wherein water can be used as a lubricant or the process temperature can be reduced, thereby avoiding the addition of organic solvents. For example, the preparation method of the petroleum-based resin may include mixing 50 to 90 parts by weight of water and 5 to 30 parts by weight of petroleum-based resin master batch, grinding with a planetary ball mill at a rotation speed of 1000 to 3000rpm for 10 to 14 hours, and drying the ground mixture to obtain the petroleum-based resin. If the grinding time is less than 10 hours, the petroleum resin master batch may be subjected to the action force for a time insufficient to form the petroleum resin with a low particle size; and if the grinding time is more than 14 hours, it may cause the petroleum-based resin to agglomerate to form a petroleum-based resin having a high particle diameter.
In some embodiments, the surfactant may have a suitable hydrophilic-lipophilic Balance (HLB) value such that it produces an adhesion promoter having a uniform low particle size, thereby increasing the stability of the adhesion promoter and providing good adhesion of the pressure sensitive adhesive tape. In some embodiments, the surfactant may have a hydrophilic-lipophilic balance of between 20 and 40. In a preferred embodiment, the surfactant may have a hydrophilic-lipophilic balance of 30. Specifically, if the hydrophilic-lipophilic balance of the surfactant is less than 20, the formed tackifier may have a high particle size and a non-uniform particle size, thereby reducing the adhesiveness of the pressure-sensitive adhesive tape; if the hydrophilic-lipophilic balance of the surfactant is greater than 40, the formed tackifier may be easily separated from the two phases, thereby reducing the stability of the tackifier.
In some embodiments, the surfactant may be an ionic surfactant, thereby providing a suitable hydrophilic-lipophilic balance. For example, the ionic surfactant may include Sodium Dodecyl Sulfate (SDS), and when sodium dodecyl sulfate is used as the surfactant, the hlb value is, for example, 40. In some embodiments, the surfactant may include an ionic surfactant and a non-ionic surfactant, wherein the weight ratio of the ionic surfactant to the non-ionic surfactant may be between 0.25 and 1.6, thereby providing a suitable hydrophilic-lipophilic balance. For example, the ionic surfactant may include sodium lauryl sulfate, and the nonionic surfactant may include polyoxyethylene. More specifically, when sodium lauryl sulfate and polyoxyethylene are used as the surfactant in a weight ratio of 0.25, the hydrophilic-lipophilic balance is, for example, 20; and when sodium lauryl sulfate and polyoxyethylene are used as the surfactant in a weight ratio of 1.6, the hydrophilic lipophilic balance is, for example, 30.
The aqueous pressure-sensitive adhesive prepared from the tackifier having a low particle size can provide good tackiness to the pressure-sensitive adhesive tape. In some embodiments, the tackiness of a pressure sensitive adhesive tape may be manifested in its various properties, such as peel strength (peel adhesion), shear strength (shear adhesion), tack (tack), or cohesion (cohesion). In some embodiments, the peel strength of the pressure sensitive adhesive tape may be between 150gf/19mm to 300gf/19mm, thereby providing high adhesion of the pressure sensitive adhesive tape. In some embodiments, the shear strength of the pressure sensitive adhesive tape may be between 120gf/19mm to 360gf/19mm, thereby reducing slippage between the pressure sensitive adhesive tape and an adherend. In some embodiments, the quick stick test result of the pressure sensitive adhesive tape may be between 0.1cm and 4cm, such that the pressure sensitive adhesive tape has good adhesion at the initial stage of adhesion. In some embodiments, the cohesion test result of the pressure sensitive adhesive tape may be between 10 minutes and 35 minutes, thereby reducing internal damage when the pressure sensitive adhesive tape is adhered.
According to the above embodiments of the present disclosure, the pressure-sensitive adhesive tape includes a water-based pressure-sensitive adhesive forming an adhesive surface thereof. Since the aqueous pressure-sensitive adhesive includes the tackifier having a low particle diameter and a uniform particle diameter, the aqueous pressure-sensitive adhesive has high stability and provides good adhesiveness to the pressure-sensitive adhesive tape. On the other hand, the tackifier of the water-based pressure-sensitive adhesive can be prepared by a direct emulsification process using water as a solvent, so that the use of an organic solvent in the production process of the pressure-sensitive adhesive tape is avoided, and the harm to the environment or human body is reduced.
In the following description, various measurements and evaluations will be made on the pressure-sensitive adhesive tape made of the tackifier and the aqueous pressure-sensitive adhesive of the present disclosure. Hereinafter, the features of the present disclosure will be described more specifically with reference to experimental examples 1 to 4. Although the following embodiments are described, the materials used, the amounts and ratios thereof, the details of the processes, the flow of the processes, and the like may be appropriately changed without departing from the scope of the present disclosure. Therefore, the present disclosure should not be construed in a limiting sense by the embodiments described below.
< experimental example 1: base formulation evaluation of adhesion promoters >
In the present experimental example, the particle size of the tackifier of each example was measured, and a stability test was performed thereon. Specifically, the stability test was conducted by centrifuging the tackifier of each example at 3000rpm for 30 minutes using a high-speed centrifuge to evaluate the stability by visually observing the separation of the tackifier. The composition and content of the tackifier of each example and the measurement results are shown in table one.
Watch 1
Note 1: the unit not shown is weight part, and the stability has no unit
Note 2: the petroleum resin particles (D90) all had a particle size of 750nm
Note 3: (A) represents an HLB value of 20; (B) represents an HLB value of 30; (C) representative HLB value of 40
As shown in Table I, the particle size of the adhesion promoter of each example is between 100nm and 500nm, and the adhesion promoter of example 2 has the smallest standard deviation of particle size. Thus, the tackifiers of the examples had a low particle size, with the tackifier of example 2 again having a more uniform particle size. In addition, none of the tackifiers of each example separated after stability testing, showing that each tackifier had good stability to maintain its low particle size state.
< experimental example 2: evaluation of storage stability of tackifier >
In this experimental example, high-temperature, normal-temperature, and low-temperature storage stability tests were performed on the tackifier of each example in experimental example 1. Specifically, the high-temperature storage stability test is to place the tackifier in an oven at a temperature of 48 ℃ for 48 hours and visually observe the separation of the tackifier after it returns to room temperature. The room temperature storage stability test was conducted by placing the tackifier in an environment at room temperature for 7 days and observing the separation of the tackifier with the naked eye. The low-temperature storage stability test is to place the tackifier in a freezer at a temperature of-5 ℃ to-15 ℃ for 24 hours and to visually observe the separation of the tackifier after it returns to room temperature. The results show that the tackifiers of each example did not undergo significant separation in the high temperature, normal temperature, and low temperature tests, and thus each tackifier had good storage stability.
< experimental example 3: basic formulation evaluation of Water-based pressure-sensitive adhesive
In this experimental example, the solid content and viscosity were measured for the aqueous pressure-sensitive adhesive of each example. Specifically, the tackifier and other components of example 2 in experimental example 1 were disposed to prepare the aqueous pressure-sensitive adhesive of each example of the experimental example, and the solid content and viscosity of each aqueous pressure-sensitive adhesive were measured. The composition and content of the aqueous pressure-sensitive adhesive of each example and the measurement results are shown in table two.
Watch two
Note 1: units not shown are parts by weight
As shown in Table two, the solid content of the water-based pressure-sensitive adhesive of each example was between 50 wt% and 60 wt%, and the viscosity was between 400cP and 800 cP. Accordingly, the aqueous pressure-sensitive adhesive of each example has a suitable solid content and viscosity, so that the aqueous pressure-sensitive adhesive has a suitable fluidity to form an adhesive surface of the pressure-sensitive adhesive tape and provide adhesiveness of the pressure-sensitive adhesive tape.
< experimental example 4: evaluation of tackiness of pressure-sensitive adhesive tape >
In this experimental example, the pressure-sensitive adhesive tapes of the respective examples were evaluated for adhesiveness. Specifically, the aqueous pressure-sensitive adhesive of each example in experimental example 3 was made into a pressure-sensitive adhesive tape, and evaluation of peel strength, shear strength, instant tack and cohesion was performed for each pressure-sensitive adhesive tape. In detail, the peel strength of each pressure-sensitive adhesive tape was measured using a standard method ASTM-D3330; shear strength is the result of testing using standard method ASTM-D1000; tack-free is the result of testing using standard method PSTC-6; the cohesion is the result of a test in which a pressure-sensitive adhesive tape is forced with a 500g weight under the conditions of a pressure-sensitive adhesive tape area of 19mm × 25mm and a temperature of 50 ℃. The test results of the pressure-sensitive adhesive tapes of the respective examples are shown in table three.
Watch III
As can be seen from Table three, the peel strength of the pressure sensitive adhesive tapes of the examples was between 150gf/19mm and 300gf/19mm, indicating that they had high adhesive force. Each pressure sensitive adhesive tape had a shear strength of 120gf/19mm to 360gf/19mm, indicating that it was not liable to slip with an adherend. The results of the quick tack test for each pressure sensitive adhesive tape were between 0.1cm and 4cm, indicating that it had high tack at the initial stage of adhesion. The results of the cohesion test of each pressure-sensitive adhesive tape were between 10 minutes and 35 minutes, showing that the adhesive tape was not easily internally broken. Therefore, the pressure-sensitive adhesive tapes of the examples have good adhesiveness in various respects.
Through the verification of the above experimental examples, the pressure sensitive adhesive tape of the present disclosure can have good adhesiveness in various aspects, and the aqueous pressure sensitive adhesive thereof can have suitable fluidity without losing adhesiveness. In addition, the tackifier of the aqueous pressure-sensitive adhesive has a uniform low particle size and good stability, so that the aqueous pressure-sensitive adhesive has high stability and provides good tackiness of the pressure-sensitive adhesive tape.
The foregoing outlines features of some embodiments so that those skilled in the art may better understand the aspects of the present disclosure. Those skilled in the art should appreciate that they may readily use the present disclosure as a basis for designing or modifying other processes and structures for carrying out the same purposes and/or achieving the same advantages of the embodiments introduced herein. Those skilled in the art should also realize that such equivalent constructions do not depart from the spirit and scope of the present disclosure, and that they may make various changes, substitutions, and alterations herein without departing from the spirit and scope of the present disclosure.
Claims (10)
1. A pressure-sensitive adhesive tape, comprising:
a substrate; and
a water-based pressure-sensitive adhesive on the substrate, wherein the water-based pressure-sensitive adhesive comprises:
20 to 30 parts by weight of a natural rubber;
18 to 28 parts by weight of a synthetic rubber; and
50 to 60 parts by weight of a tackifier, wherein the tackifier has a particle size (D90) of between 100 to 500 nm.
2. The pressure-sensitive adhesive tape according to claim 1, wherein the tackifier is prepared by including the following agents:
45 to 50 parts by weight of deionized water;
45 to 50 parts by weight of a petroleum resin;
0.5 to 6 parts by weight of a surfactant; and
0.5 to 2 parts by weight of a stabilizer.
3. The pressure-sensitive adhesive tape according to claim 2, wherein the petroleum resin has a particle size (D90) of 700nm to 1000 nm.
4. The pressure-sensitive adhesive tape according to claim 2, wherein the surfactant has a hydrophilic-lipophilic balance of 20 to 40.
5. The pressure sensitive adhesive tape of claim 2, wherein the surfactant is an ionic surfactant comprising sodium lauryl sulfate.
6. The pressure-sensitive adhesive tape according to claim 2, wherein the surfactant comprises an ionic surfactant and a nonionic surfactant, and the weight ratio of the ionic surfactant to the nonionic surfactant is between 0.25 and 1.6.
7. The pressure-sensitive adhesive tape according to claim 6, wherein the nonionic surfactant comprises polyoxyethylene.
8. The pressure-sensitive adhesive tape according to claim 2, wherein the stabilizer comprises polyvinylpyrrolidone.
9. The pressure-sensitive adhesive tape according to claim 1, wherein the solid content of the aqueous pressure-sensitive adhesive is 50 to 60 wt%.
10. The pressure-sensitive adhesive tape according to claim 1, wherein the pH of the aqueous pressure-sensitive adhesive is between 9 and 11.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW110109826A TWI792228B (en) | 2021-03-18 | 2021-03-18 | Pressure sensitive tape |
| TW110109826 | 2021-03-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115109538A true CN115109538A (en) | 2022-09-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110472894.4A Pending CN115109538A (en) | 2021-03-18 | 2021-04-29 | Pressure-sensitive adhesive tape |
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| CN (1) | CN115109538A (en) |
| TW (1) | TWI792228B (en) |
Citations (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4477613A (en) * | 1983-08-01 | 1984-10-16 | Sylvachem Corporation | Stabilization of tackifying resin dispersions |
| US4629758A (en) * | 1984-05-28 | 1986-12-16 | Bridgestone Corporation | Adhesive for rubber compounds |
| US4684685A (en) * | 1986-01-27 | 1987-08-04 | Dennison Manufacturing Company | Readhering and removable adhesive |
| JPH05247150A (en) * | 1992-03-06 | 1993-09-24 | Toyo Ink Mfg Co Ltd | Aqueous dispersion composition of tackifier resin |
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| Publication number | Publication date |
|---|---|
| TW202237780A (en) | 2022-10-01 |
| TWI792228B (en) | 2023-02-11 |
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