国产在线一区二区视频_欧美中日韩免费观看网站}_日b视频在线观看_在线可以免费观看的a√片_亚洲综合另类小说色_在线观看播放另类国产小视频_久久精品国产精品九九_中文字幕在线观视频2020_日本东京热加勒比有码视频一区_免费毛儿一区二区十八岁

1、 Overview

The main components of AF # defoamer are high-grade alcohol and high-grade defoamer. Only 1 to 5 grams / liter can prevent and eliminate the foam produced in the process of PCB production, such as pumice whiteboard, dry film and photosensitive ink development and deinking. Moreover, it is completely dissolved in weak alkaline solution without precipitation, which is harmless, safe and reliable to human body. Moreover, it has low viscosity, easy dispersion and fast and strong defoaming effect.

2、 Technical indicators

Appearance: colorless to yellowish liquid

Ionic properties: non-ionic

Density: 0.98-1.02

PH value: 6-8

Stability: 100%

Defoaming performance: 500ml (liquid + foam), s ≤ 60

Foam inhibition performance: 600ml (liquid + foam), s ≤ 400

Shelf life: six months

3、 Method of use

Directly adding AF-333# into the solution before the foam is formed can control foam effectively and prevent foam formation. If the foam has been formed, dilute it with 5 times of water before adding the solution, it can instantly remove the formed foam.

The amount of af-333# added is 1-5g / L, which is related to the temperature, composition and spraying pressure (stirring speed) of the solution medium, and is also increased or decreased according to the effectiveness of defoaming.

4、 Packaging and storage

Packing: 20kg

Storage: store at room temperature and do not contact with acidic substances.

Period of validity: six months.