008613586027236
0102030405
Highly Absorbent Montmorillonite Desiccant from China Suppliers and Factory - Moisture-Proof, Fast Drying, Safe
Common forms and functions
1. Physical Form
| Graininess | The most common form is irregular or nearly spherical small particles. Larger specific surface area and faster moisture absorption rate. |
| Spherical | Regular balls made by granulation process. Good fluidity, beautiful appearance, more uniform filling during packaging, and less dust. |
| Strip / Block Shaped | Rarely seen, usually used for specific devices or spaces. |
2. Particle Size / Mesh Number
| 1–2 mm | The most commonly used size, suitable for the vast majority of small packaging (such as electronic products, food bags). |
| 2–4 mm | |
| 4–8 mm | Used for slightly larger spaces such as luggage, shoe boxes, and small to medium-sized packaging boxes. |
| Coarse-grained (>8 mm) | Less commonly used for direct packaging; powder form may be used for filling special composite materials. |
| Fine Powder |
3. Unit Packaging Weight
This is the most direct specification parameter selected by the user, determined based on the size of the packaging container and moisture resistance requirements. Weight does not represent its performance limit, but rather a convenient packaging for standard application scenarios.
| Specifications | Use | |
| Micro / Small Sized | 1g 2g 3g 5g 10g | Extremely small spaces such as small medicine bottles, small electronic product bags, cosmetic samples, camera lens covers, etc. |
| Standard Specification | 20g 30g 50g 100g | This is the most widely used interval. Suitable for shoe boxes, handbags, toolboxes, instrument boxes, medium-sized food packaging, suitcases, etc. |
| Medium Size Specification | 200g 500g 1000g | Large packaging boxes, container drying rods/bags, warehouse shelves, wardrobes, small enclosed spaces (such as safes, Gun Safe). |
| Large / Industrial Specifications | 5 kg / 10 kg and above (usually bagged or barreled loose materials) | Used for internal filling of large equipment, large-scale container loading, moisture-proof storage of industrial raw materials, or as a raw material for recycled desiccants. |
Core functions of the product
🌿 Safety & Environmental Protection
The raw material is natural mineral, non-toxic, odorless, and non-corrosive. After disposal, it can be treated as general waste and is harmless to the environment.
- Non-corrosive — will not corrode metal or other packaging materials.
- Non-toxic — suitable for food and medicine fields (must comply with relevant standards).
- Compliant with EU environmental regulations such as REACH and RoHS.
💧 High Hygroscopicity
Under low humidity conditions (<50% RH), its moisture absorption performance is significantly better than that of silica gel desiccant. The moisture absorption curve is gentle and the moisture absorption rate is stable. Saturation moisture absorption rate exceeds 50% of its own weight — 1.5× that of traditional desiccants.
🔄 Reversible Regeneration
After moisture saturation, most of the moisture absorption capacity can be restored through drying, which is cost-effective.
🌡️ Good Temperature Adaptability
Performance is stable at room temperature. Moisture absorption capacity decreases at high temperatures (>50°C) — a common characteristic of physical adsorbents.
🧱 Shape Stability
During the moisture absorption process, the shape remains unchanged and will not liquefy, leak, or collapse.
💰 Low Price
Widely sourced raw materials — it is one of the lowest cost desiccants available.
Application field
| Field | Use |
| 🍱 Food Industry | Packaging for snacks, dry goods, tea, seafood, etc. |
| 👟 Clothing, Footwear & Headwear | Prevent clothing, leather, and shoes from getting damp and moldy during storage and transportation. |
| 🏠 Household Items | Gift boxes, toolboxes, storage cabinets, wardrobes, etc. |
| 📱 Electronic & Electrical Appliances | Moisture-proof packaging for lightweight electronic products. |
| 🚢 Storage & Transportation | Container and container moisture prevention to prevent "container rain" of goods. |
| ⚙️ General Industrial Products | Rust-proof packaging for hardware, mechanical parts, and instruments. |
Comparison of other common desiccants
| Characteristic | Bentonite Desiccant | Silica Gel Desiccant | Calcium Chloride Desiccant |
| Main Ingredient | Natural bentonite | Synthetic silica gel | Calcium chloride |
| Moisture Absorption Principle | Physical adsorption (reversible) | Physical adsorption (reversible) | Chemical adsorption (deliquescence, conversion) |
| Low Humidity Effect | ⭐ Optimal (<50% RH) | Good | General |
| Environmental Friendliness | ⭐ Excellent, naturally treatable | Good, but it is a synthetic product | Generally, solutions have weak corrosiveness |
| Safety | ⭐ High (non-toxic), safe and inert | High (non-toxic), safe and inert | Medium (with irritability) |
| Cost | ⭐ Minimum | Medium | Low (but with low unit moisture absorption cost) |
| Typical Color Variation | Color deepens; particles become damp | Orange/Blue → Colorless/Pink | Particles → Solution |
| Best Operating Environment | Normal temperature and humidity, short-term moisture resistance | Widely used, especially precision instruments | High humidity environment, sealed space |
Precautions
- ⚠ 1 Not Edible: Although non-toxic, it must not be consumed. Please keep away from children to prevent accidental ingestion.
- ⚠ 2 Avoid Damage: Damaged inner packaging (non-woven fabric or composite paper) can cause dust leakage.
- ⚠ 3 Timely Replacement: Observe the color change of the indicator, or when the desiccant particles become darker in color, feel damp, or have a significant increase in weight — this indicates they have absorbed enough moisture and should be replaced or regenerated.
- ⚠ 4 Sealed Environment: Desiccants can only effectively exert local dehumidification effects in relatively sealed spaces.
- ⚠ 5 Storage: Unused desiccants should be stored in a cool, dry place and kept sealed.
❓ Frequently Asked Questions
Q What is bentonite desiccant made of?
Bentonite desiccant is made from natural bentonite mineral. It is non-toxic, odorless, and non-corrosive, making it a safe and environmentally friendly moisture-absorbing material.
Q What particle size of bentonite desiccant should I choose for small packaging?
For small packaging such as electronic product bags, food bags, and medicine bottles, 1–2 mm or 2–4 mm particle sizes are the most commonly recommended. For larger spaces like shoe boxes or luggage, 4–8 mm particles are more suitable.
Q Can bentonite desiccant be reused or regenerated?
Yes. Bentonite desiccant supports reversible regeneration. After reaching moisture saturation, it can be dried (typically at moderate temperatures) to restore most of its moisture absorption capacity, making it a cost-effective option for repeated use.
Q Is bentonite desiccant safe for food and pharmaceutical packaging?
Bentonite desiccant is non-toxic and inert, making it suitable for use in food and pharmaceutical packaging. However, it must comply with relevant safety standards and regulations for those specific industries.
Q How does bentonite desiccant compare to silica gel desiccant?
Both use physical adsorption and are non-toxic. Bentonite desiccant performs better at low humidity (<50% RH) and is significantly cheaper due to its natural mineral origin. Silica gel is more versatile across a wider humidity range and is commonly used for precision instruments.
Q How do I know when the bentonite desiccant needs to be replaced?
You can tell it's time to replace the desiccant when the particles become noticeably darker in color, feel damp to the touch, or show a significant increase in weight. Using a humidity indicator card alongside the desiccant can also help monitor moisture levels inside the packaging.