1、 Overview

Developer s-655# is a kind of developer specially used for high-quality solder proof ink / line dry filmThe main components are high-purity potassium carbonate, fiber dissolving agent, water softener, non silicon defoamer and other high-grade raw materials. This product has the advantages of excellent analytical ability, excellent stability and long service life, so it is widely used in the production of high-density and thin linesIn HDI process, it is used as a substitute for sodium carbonate solution.

This product series is divided into cylinder opening agentS-655a, supplement s-655r or 10x concentrated supplement s-655p.

2、 Its physical and chemical properties, uses and precautions are introduced as follows:

1. Physical characteristics

Product name s-655a s-655r s-655p

The appearance is colorless and transparent, and the liquid is the same as left and right

Density D20 / 20 1.00-1.02 same as left and right

Freezing point - 0.8 -- 1 ℃ same as left and right

2. Chemical properties

Product name s-655a s-655r s-655p

Potassium carbonate content: 1.4-1.8%, 1.8-2.0%, 20-22%

PH 11-11.4 11-11.4 12-12.4

Silicon free

Flammability and nonflammability

3. Process parameters

Item / index anti welding ink line ink

Cylinder opening s-655a stock solution is the same as that on the left

Temperature: 30-32 ℃ 28-30 ℃

Spray pressure 1.8-3.5kg/cm2 1.5-3.0kg/cm2

PH 11.2±0.2 11.0±0.2

Initial point: 30% - 40%, 35% - 50%

Automatically add the automatic adding system based on pH control, and set the pH value to 11.2

The replacement cycle is 1-2 weeks or 30000-40000 ft2, and the slot and nozzle are cleaned at the same time

The above parameters are set with a certain brand of ink as a reference, and may not be suitable for all brands and models of ink. They need to be adjusted according to the instructions of the ink.

4. Test method:

1. Transfer 5ml of the sample to a 250ml conical flask and add 50ml of distilled water;

2. Drop 5 drops of bromocresol green methyl red mixed indicator;

3. Titrate with 0.1N hydrochloric acid standard solution until the solution changes from green to dark red, boil for 2 minutes, and continue titrating to dark red after cooling;

4. Blank test shall be conducted at the same time.

5. Calculate potassium carbonate content (%) = 1.38 (v-v0) C / D V: volume of hydrochloric acid standard solution consumed by the sample, ml;

V0: volume of hydrochloric acid standard solution consumed in blank test, ml;

C: Accurate concentration of hydrochloric acid standard solution, mol / L;

d: Density of the specimen.

5．matters needing attention

This product is a weakly alkaline liquid and does not belong to dangerous chemicals.

Try to avoid direct contact with human body. Clean the skin with clean water; If splashed into eyes, wash with plenty of water.This product should be packaged in plastic containers and stored in a cool and ventilated place.

Valid for one year.