A two-step preparation method of high-performance conductive pressure-sensitive adhesive tape

Abstract

The invention relates to a two-step preparation method of a high-property conductive pressure-sensitive adhesive tape. The pressure-sensitive adhesive tape comprises two-layer membrane materials, namely a lower conductive carbon slurry layer and an upper pressure-sensitive adhesive layer. The two-step preparation method particularly comprises the following steps of: (1) uniformly coating conductive carbon slurry on the surface of a substrate to prepare a membrane, and drying; (2) uniformly coating a layer of pressure-sensitive adhesive on the conductive carbon slurry membrane layer to prepare a membrane, and drying. The two-step preparation method disclosed by the invention can meet the requirements for both high conductivity and high adhering property by using low-cost carbon black or graphite as conducting particles.

Description

technical field

[0001] The invention relates to the technical field of conductive pressure-sensitive adhesive (tape), in particular to a two-step method for preparing high-performance conductive pressure-sensitive adhesive tape. Background technique

[0002] With the rapid development of the electronics industry, the demand for pressure-sensitive adhesives with conductive functions is becoming more and more urgent. Conductive pressure-sensitive adhesive is a special adhesive that can effectively bond various materials after curing or drying, and has conductive properties. The common substrates of pressure-sensitive adhesives are polyacrylate, epoxy resin, phenolic resin and polyurethane, etc. Among them, the conductive pressure-sensitive adhesive based on polyacrylic resin has a wide range of bonding, good light resistance, good water resistance and convenient use. widely favored for its advantages.

[0003] At present, the conductive pressure-sensitive adhesives used in t...

Examples

preparation example Construction

[0039] 1. Preparation of conductive carbon paste: Accurately weigh a certain amount of dissolved polymer resin solution, add an appropriate amount of additives, curing agent and organic solvent, fully stir and disperse, and then add a certain amount of carbon black (particle size is 30 ~300nm) and graphite (particle size 3~25μm), high-speed stirring to disperse into a slurry, using a three-roller to grind the resulting slurry to a fineness of 5μm and a viscosity of 12000mpa·s to obtain a conductive carbon paste;

[0040] 2. Preparation of pressure-sensitive adhesive: Accurately weigh a certain amount of polyacrylic acid resin solution, add leveling agent and organic solvent, fully stir and disperse, then add a certain quality of carbon black (particle size is 30-300nm) and graphite ( The particle size is 3-25μm), high-speed stirring and dispersing into a slurry, and the obtained slurry is ground by a three-roller machine, and the measured fineness is 5-10μm, and the viscosity i...

Embodiment 1

[0044] The mass percentages of the raw materials for preparing conductive carbon paste and pressure-sensitive adhesive are shown in Table 1. The high polymer resins and polyacrylic resins mentioned in Tables 1 to 4 need to be used as solutions, and the mass percentages indicated in the tables are the amounts of pure high polymer resins and polyacrylic resins, excluding those used when making solutions. the amount of solvent used.

[0045] Table 1

[0046]

[0047]

[0048] Film-making method: The film-making method of the conductive carbon paste film layer is the screen printing method, and it is dried at 110°C for 10 minutes; the film-making method of the pressure-sensitive adhesive layer is the roll coating method, and it is dried at 110°C for 5 minutes.

Embodiment 2

[0050] The mass percentages of the raw materials for preparing conductive carbon paste and pressure-sensitive adhesive are shown in Table 2.

[0051] Table 2

[0052]

[0053]

[0054] Film-making method: The film-making method of the conductive carbon paste film layer is the screen printing method, which is dried at 120°C for 8 minutes; the film-making method of the pressure-sensitive adhesive layer is the screen printing method, which is dried at 120°C for 1 minute.

technical field

[0001] The invention relates to the technical field of conductive pressure-sensitive adhesive (tape), in particular to a two-step method for preparing high-performance conductive pressure-sensitive adhesive tape. Background technique

[0002] With the rapid development of the electronics industry, the demand for pressure-sensitive adhesives with conductive functions is becoming more and more urgent. Conductive pressure-sensitive adhesive is a special adhesive that can effectively bond various materials after curing or drying, and has conductive properties. The common substrates of pressure-sensitive adhesives are polyacrylate, epoxy resin, phenolic resin and polyurethane, etc. Among them, the conductive pressure-sensitive adhesive based on polyacrylic resin has a wide range of bonding, good light resistance, good water resistance and convenient use. widely favored for its advantages.

[0003] At present, the conductive pressure-sensitive adhesives used in t...

Examples

preparation example Construction

[0039] 1. Preparation of conductive carbon paste: Accurately weigh a certain amount of dissolved polymer resin solution, add an appropriate amount of additives, curing agent and organic solvent, fully stir and disperse, and then add a certain amount of carbon black (particle size is 30 ~300nm) and graphite (particle size 3~25μm), high-speed stirring to disperse into a slurry, using a three-roller to grind the resulting slurry to a fineness of 5μm and a viscosity of 12000mpa·s to obtain a conductive carbon paste;

[0040] 2. Preparation of pressure-sensitive adhesive: Accurately weigh a certain amount of polyacrylic acid resin solution, add leveling agent and organic solvent, fully stir and disperse, then add a certain quality of carbon black (particle size is 30-300nm) and graphite ( The particle size is 3-25μm), high-speed stirring and dispersing into a slurry, and the obtained slurry is ground by a three-roller machine, and the measured fineness is 5-10μm, and the viscosity i...

Embodiment 1

[0044] The mass percentages of the raw materials for preparing conductive carbon paste and pressure-sensitive adhesive are shown in Table 1. The high polymer resins and polyacrylic resins mentioned in Tables 1 to 4 need to be used as solutions, and the mass percentages indicated in the tables are the amounts of pure high polymer resins and polyacrylic resins, excluding those used when making solutions. the amount of solvent used.

[0045] Table 1

[0046]

[0047]

[0048] Film-making method: The film-making method of the conductive carbon paste film layer is the screen printing method, and it is dried at 110°C for 10 minutes; the film-making method of the pressure-sensitive adhesive layer is the roll coating method, and it is dried at 110°C for 5 minutes.

Embodiment 2

[0050] The mass percentages of the raw materials for preparing conductive carbon paste and pressure-sensitive adhesive are shown in Table 2.

[0051] Table 2

[0052]

[0053]

[0054] Film-making method: The film-making method of the conductive carbon paste film layer is the screen printing method, which is dried at 120°C for 8 minutes; the film-making method of the pressure-sensitive adhesive layer is the screen printing method, which is dried at 120°C for 1 minute.

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