Desiccant Bag Silica Gel Signus OB-3 (3g)
Desiccant bags Signus OB-3 are filled with clear silica gel weighing 3 g and are used for effective moisture absorption in closed packages and containers. They protect sensitive products from corrosion, mold, changes in properties, and other negative effects of increased air humidity.
Main advantages
- Reliable moisture absorption – high adsorption capacity of silica gel at various levels of relative humidity.
- Protection of sensitive materials – prevents corrosion of metals, mold, degradation of electronics, textiles, food, and pharmaceutical products.
- Repeatable usability – bags can be regenerated in an electric or microwave oven without significant loss of parameters.
- Universal use – suitable for industrial packaging, logistics, storage, home use, and hobby projects (e.g., 3D printers, filaments, tools).
- Without dye – clear (transparent) silica gel without indicator, suitable for a wide range of applications.
Typical use
- packaging and storage of electronic devices and components
- pharmaceutical products and laboratory material
- food packaging and dietary supplements
- medical devices and health aids
- industrial packaging and logistics
- drying flowers and protection of textile products
- storage and archiving of 3D printing filaments and other moisture-sensitive accessories
By using a sufficient amount of silica gel in a closed container, a relative humidity lower than 10 % can be achieved, which significantly extends the lifespan of protected products.
Regeneration and reuse
Bags can be repeatedly dried and reused:
- Electric oven:
- temperature 130–160 °C
- regeneration takes place until water vapor stops escaping from the bags
- Microwave oven:
- approximate guide 100 g / 1 minute at 650 W (at the lowest possible power)
- for small bags (1–100 g), use the defrost program and always test the appropriate time according to the microwave oven power
As soon as vapor stops rising from the bag, the silica gel is regenerated and ready for further use.
Always pay attention to safety during regeneration, do not leave the oven unattended, and adapt the process to the specific device.
Technical parameters of silica gel in OB‑3 bags
- Type of filling: clear (transparent) silica gel
- Filling weight in bag: 3 g
- Bulk density: approx. 620–700 g/l
- Adsorption capacity at 23 (±2) °C:
- at 20 % relative humidity: approx. 11.0 %
- at 50 % relative humidity: approx. 25.5 %
- at 90 % relative humidity: approx. 36.0 %
- Loss on ignition (950 °C): approx. 6.7 %
- Active surface: approx. 800 m²/g
- pH: 4–6
- Pore diameter: 2.0–3.0 nm
- Pore volume: 0.35–0.45 ml/g
- Thermal conductivity: approx. 0.63 kJ/m·h
Use in the 3D printing environment
Desiccant bags Silica Gel Signus OB-3 are also ideal for the 3D printing area:
- placement in sealable boxes with filaments (PLA, PETG, Nylon, TPU, etc.)
- insertion into the enclosure or box of a 3D printer for more stable conditions
- use during long-term storage of sensitive materials that suffer from moisture absorption (e.g., PA, PVA, flexible materials)
This helps to maintain better print quality, minimize popping, bubbles in the print, and other defects caused by moisture in the filament.
Table of technical parameters
| Parameter | Value |
|---|
| Product type | Desiccant bag with silica gel |
| Designation | Signus OB-3 |
| Filling weight | 3 g silica gel |
| Silica gel type | clear, without indicator |
| Bulk density | approx. 620–700 g/l |
| Adsorption at 20 % RH | approx. 11.0 % (relative to its own weight) |
| Adsorption at 50 % RH | approx. 25.5 % |
| Adsorption at 90 % RH | approx. 36.0 % |
| Active surface | approx. 800 m²/g |
| pH | 4–6 |
| Pore diameter | 2.0–3.0 nm |
| Pore volume | 0.35–0.45 ml/g |
| Loss on ignition (950 °C) | approx. 6.7 % |
| Recommended regeneration temperature | 130–160 °C (electric oven) |
| Recommended microwave power | approx. 650 W, defrost program |
Package contents
The package contents may vary depending on the selected product variant (e.g., set of 100 pcs, carton of 5000 pcs). However, each individual bag always contains 3 g of clear silica gel.
Why use desiccant bags for 3D printing
- they maintain low humidity in filament containers
- they help preserve mechanical properties of filaments
- they reduce the risk of bubbles, popping, and stringing during printing
- cheap and effective solution without the need for complex devices
The desiccant bag Silica Gel Signus OB-3 (3g) is a practical and affordable accessory for anyone who needs to reliably protect their products, materials, and especially 3D printing filaments from the harmful effects of moisture.
Key features:
- Bag weight 3 g of clear silica gel for compact use in smaller packages
- High adsorption capacity over a wide range of relative humidity
- Effective protection against corrosion, mold, and degradation of sensitive materials
- Possibility of repeated regeneration in electric and microwave ovens
- Suitable for electronics, food, pharmaceutical products, textiles, and industrial packaging
- Ideal for drying and storage of 3D printing filaments and accessories
