Product Details
Product Description
Product Description
Semi-flow silicone sealant is a class of one-component room temperature curing neutral silicone materials, cured elastomer. It has excellent resistance to hot and cold alternating properties, aging resistance, flexibility, insulation, moisture, shock, corona resistance, resistance to leakage, and is a replacement for the traditional 703, 704 silicone rubber, suitable for electronic circuit boards, part of the electronic components of the local encapsulation protection.
QLD591W Silicone Rubber Sealant
Deoxime type, white color, encapsulation of electronic components such as electrical modules.
QLD591B Silicone Rubber Sealant
Deoxime type, black colour, adhesive sealing for electronic components, circuit boards, relays, microwave ovens, etc.
QLD591T Silicone Rubber Sealant
Deoxime type, semi-transparent, with transparent requirements of all kinds of electronic components encapsulation protection.
QLD581 Silicone Rubber Sealant
Dehydrated, various colours, non-corrosive to polycarbonate (PC), copper and other materials, used for all kinds of electronic components encapsulation protection.
Performance indicators
Semi-Fluid Silicone Sealant
|
Performance indicators
| QLD591W
| QLD591B
| QLD591T
| QLD581
|
Appearances
| White semi-fluid
| Black semi-fluid
| Translucent semi-fluid
| By choice
|
Densities（g/mm3）
| 1.15
| 1.15
| 1.02
| 1.15
|
Surface drying time（min）
| 10~30
| 10~30
| 10~30
| 5~15
|
Tensile strength（MPa）
| 1.0
| 1.0
| 1.0
| 1.0
|
Elongation（%）
| 200~300
| 200~300
| 200~300
| 200~300
|
Hardness（shore A）
| 30~50
| 30~50
| 20~30
| 20~30
|
Shearing strength（MPa）
| ≥0.5
| ≥0.5
| ≥0.5
| ≥0.5
|
Dielectric strength（kv/mm）
| ≥20
| ≥20
| ≥20
| ≥20
|
Loss factor（1.2MHz）
| 0.001
| 0.001
| 0.001
| 0.001
|
Volume resistance（Ω·cm 25℃）
| 1.0×1015
|
Working temperature range（℃）
| -60~250
| -60~250
| -60~250
| -60~250
|
Wire shrinkage（%）
| 0.3
| 0.3
| 0.3
| 0.3
|
Operation process
1、Clean surface: Tidy up the surface of the sealed object and remove rust, dust, moisture and oil.
2、Sizing: Unscrew the cap of the hose, prick open the sealing mouth, squeeze the glue to the cleaned surface, and make it flow naturally into a semicircle.
3、Curing: the glue absorbs the moisture in the air, the surface begins to solidify, gradually to the deep curing, in 24 hours (room temperature and 60% relative humidity) within the curing depth of 3~4mm.
4、Summer temperature is high, high humidity, curing will be faster; winter temperature is low, low humidity, curing will be slower.
Notes
1. Silicone rubber absorbs moisture and cures, unused rubber should be sealed and stored.
2. Sealed storage in a cool and dry place for 9 months.
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