Fuji Seiki Industry Co., Ltd. launches super-powerful photosensitive adhesive to the world

As the line width requirements for solar cells are getting thinner and thinner, they have basically reached the limit of traditional printing. In addition, the current high silver price has imposed higher requirements on photosensitive adhesives. The thinner the line width, the better, the thinner the template, the better, and the more prints, the better. Existing customers have proposed that the thickness of the photosensitive adhesive film can only be 18um. In addition, the opaque nature of the steel wire mesh has brought unprecedented difficulties to plate making. The print runs must reach 15,000-20,000 times, otherwise it will waste too much silver paste, increasing the cost.

Fuji Seiki Industry Co., Ltd. recently launched a "royal-grade photosensitive adhesive" to the world - a photosensitive adhesive resistant to polar solvents. Fuji Seiki Industry Co., Ltd. recently launched a "royal-grade photosensitive adhesive" to the world - a photosensitive adhesive resistant to polar solvents. Its performance in platemaking is more superior, especially it is more suitable for printing solar slurry, and has better screen passing performance. The screen passing performance of 45um-80um line width is more obvious than that of traditional photosensitive adhesives. The printing quality is also improved, and it is resistant to strong acid and alkali solvents; it is an ultimate photosensitive adhesive product, and the number of printing times is 4-6 times that of other photosensitive adhesives.

Photosensitive adhesive is also called photosensitive emulsion. It and photosensitive film (also called film) are currently commonly used photosensitive materials. Photosensitive adhesive is used for direct plate making. It is generally divided into two types: single-liquid type and double-liquid type. The photosensitizer has been mixed into the latex during production of the single-liquid photosensitive adhesive, and it can be used without preparation. Before using the double-liquid photosensitive adhesive, the photosensitizer must be dissolved in water according to the formula, and then mixed in the latex and stirred thoroughly and placed for 1-2 hours. It can be used after the bubbles disappear completely.

Photosensitive adhesives can generally be divided into two types: solvent-resistant and water-resistant. Solvent-resistant photosensitive adhesives are resistant to various organic solvents and are suitable for printing oil-based inks; water-resistant photosensitive adhesives are suitable for printing water-based inks (water-soluble printing coatings, such as textile printing pastes). The former can be stripped and recycled; the latter generally cannot be stripped and recycled. Special water-resistant photosensitive adhesives include nylon photosensitive adhesives and diazo photosensitive adhesives. Users must select and use appropriate photosensitive adhesives based on the printing object and refer to the relevant instructions.

Photosensitive adhesive is a photosensitive material used for direct plate making, and can be divided into single-liquid type and double-liquid type. Single-liquid photosensitive adhesive has the photosensitive agent added to the latex during production, and can be applied without preparation when used; before using the double-liquid photosensitive adhesive, the photosensitive agent must be dissolved according to the formula instructions, and then dispersed and mixed in the latex, and can be applied after defoaming.

There are many types and varieties of photosensitive adhesives, and the formulas of manufacturers are also inconsistent. When selecting, you can choose according to the requirements of the substrate and refer to the product manual.

Typical data of NU-TCP99 new photosensitive adhesive

Polar solvent resistant photosensitive adhesive series:

Highly functional diazo solvent-resistant screen printing photosensitive emulsion NU-TCP99 photosensitive adhesive

Basic parameters:

Appearance: White viscous resin solution

Viscosity: 7100mPa.s (B-type viscometer, 25°C)

Solid content: 40% (weight percentage)

Reference exposure time: 300 mesh yellow screen, film thickness 5um, 2KW iodine gallium lamp, distance 1m, 250S

Main features: High resistance to polar solvents. The photosensitive film is non-conductive and has good screen regeneration properties.

Packaging specifications: 1KG/barrel (1KG colloid), 5KG/barrel (5KG colloid)

Note: Comes with blue pigment liquid, customers can add pigment to adjust the color according to plate making needs.

Performance characteristics:

NU-TCP99 is a diazo solvent-resistant stainless steel wire mesh/polyester (WireMesh/PETMesh) special photosensitive adhesive, which has extremely strong bonding strength with stainless steel wire mesh; high resolution, easy to make fine lines, suitable for high-precision printing, no ink seepage during printing, and clear and full patterns after printing. It is suitable for printing ceramic substrates, PDP, LCD, VFD, Solar, chip resistors and capacitors optical components, thick film circuits, etc., which require stainless steel screens for high-precision plate making and printing industries.

NU-TCP99 photosensitive adhesive properties:

It is particularly resistant to NMP and DMF polar solvents, strong acid and alkali substances, and its printing times are 4-6 times that of ordinary photosensitive adhesives. The ink and paste have very good ink permeability. The printing times record of 200 million printings in the solar cell corrosion paste process has been achieved.

Directions:

Sensitization: Use about 100g of clean water to dissolve the photosensitizer, then pour the photosensitizer solution into the photosensitive adhesive, stir it thoroughly, and use it after the bubbles disappear.

Coating: Use a high-quality scraper for coating. If more than two coating processes are required, the next process must be carried out after the screen coated in the previous process is completely dry, otherwise it will cause the film to fall off.

Drying: The drying temperature should be controlled below 40℃. Too high temperature will cause thermal reaction of the photosensitive adhesive and affect the plate making effect.

Exposure: It is recommended to perform secondary exposure after development, which can effectively improve the printing durability.

Note:

Photosensitive adhesive should be stored and used at room temperature between 5 and 25 degrees Celsius. After adding photosensitizer, it is best to store it in a refrigerator at 5 to 15 degrees Celsius to ensure the quality and effect of the photosensitive adhesive. It is forbidden to store it below 0 degrees Celsius.