Type code

explanation

use

R

Pure resin

For microelectronics, radio assembly line welding (for corrosive insulation resistance, which are particularly stringent occasions)

RMA

Moderate activity of resin-based flux

Wireless or wired devices for welding assembly (on the high insulation resistance requirements)

RA

Reactive resin-based flux

Radio and TV General assembly welding (for soldering with a high efficiency of the occasion)

Standard value%

Minimum%

Max%

note

Ⅰ

1.1

0.8

1.5

According to customer’s requirement

Ⅱ

2.2

1.5

2.6

Ⅲ

3.3

2.6

3.9

Type

R

RMA

RA

Halogen content

Silver chromate test paper should not be white or light yellow color

<0.1%

0.1%~0.5%

Resistivity of aqueous extractΩ.cm

≥1×105

≥1×105

≥5×104

Insulation resistanceΩ

≥1×1012

≥1×1011

≥1×1010

Expansion rate%

≥75

≥80

≥85

Dryness

Flux surface should be no sticky residue on the surface of the chalk powder to be easily removed

Copper Mirror Corrosion

Should be basically unchanged

There should not be penetrating the corrosion of copper film

Project

Specifications

Test Method

Halogen content

<0.1%

JIS≥3197

Dryness

No point of focus on the product surface residue, easy to clean

JIS≥3197

Bronze mirror plate corrosion

No corrosion is

JIS≥3197

Water-soluble resistance

≥5×104Ω.cm

JIS≥3197

SIR

C-96/40/95

C-40-95

>10GΩ

JIS≥3197

To room temperature after the test

>100GΩ

JIS≥3197

Project

Specifications

Test Method

Expansion rate

>80%

JIS≥3197