Detailed description of the desiccant:
Silica gel desiccant is a highly active adsorbent material, usually prepared by reacting sodium silicate and sulfuric acid, and undergoing a series of post-treatment processes such as aging and acid foam. Silica gel is an amorphous substance with a chemical formula of mSiO2. nH2o. It is insoluble in water and any solvent, non-toxic and tasteless, chemically stable, and does not react with any substance except strong alkali and hydrofluoric acid. The chemical composition and physical structure of silica gel determine the characteristics that it is difficult to replace with many other similar materials. The silica gel desiccant has high adsorption performance, good thermal stability, stable chemical properties, and high mechanical strength. Brief Introduction of Silica Gel Desiccant of Linyi Tairui Machinery Co., Ltd. Silica gel desiccant is a variety of silica gel packed in moisture-permeable pouch. The main raw material silica gel is a high-porosity structure of hydrous silica, non-toxic, odorless, odorless, chemical. Stable, with strong moisture absorption properties. Therefore, it is widely used in the storage and transportation of instruments, instruments, equipment, leather, bags, shoes, textiles, food, medicines, etc. to control the relative humidity of the environment to prevent moisture, mildew and rust. Safety of silica gel Silicone has a strong adsorption capacity and can cause dryness on human skin. Therefore, wear overalls when handling. If the silicone enters the eye, rinse with plenty of water and seek medical attention as soon as possible.
Silica gel itself is a neutral substance. It does not react with any other substances except it reacts with strong bases and strong acids under certain conditions. At the same time, silica gel is also the only desiccant approved by the US FDA for direct contact with pharmaceuticals and food.
After the silicone desiccant has been ingested, it is not necessary to be nervous. It does not cause harm to the human body and is not absorbed by the body. After eating, you can drink some milk, so that the silica gel desiccant will be quickly discharged with human feces. Quality indicators Quality indicators in line with HG/T2765-2005
Unit adsorption capacity: ≥10% when the adsorption amount is RH=20% ≥20% when RH=40% ≥30% when RH=90%
Note: According to GB10455-89 standard: qualified product ≥28% when RH=90% First product ≥29% Excellent product ≥30% Packing specification Common specifications: 1g, 2g, 3g, 5g, 10g, 20g, 30g
Packaging materials: composite paper, non-woven fabric, composite non-woven fabric, DuPont paper, OPP film
Outer packaging: lining plastic bag closed, external corrugated box, each package is equipped with humidity indicator card (RH10%±5%). Pharmaceuticals, machinery, optical electronics, precision instruments, instruments, seeds, processed food, tea, various Chemical fiber textiles, leather shoes, leather, sports shoes and cultural relics archives, cameras , arts and crafts, and other items that require moisture and mildew are widely used. Specific instructions are as follows
1. Silica gel desiccant can be used for moisture protection of bottled medicines and foods. Ensure the drying of the contents and prevent the growth of various molds.
2, silica gel desiccant can be used as a general packaging desiccant. Such as luggage, clothing, shoes and hats, leather, etc., to prevent the quality of the product from being affected by moisture during storage or transportation.
3, silica gel desiccant can be conveniently placed in electronic products, instrumentation, household appliances, machinery and other products to prevent the quality of the product due to moisture.
4, silica gel desiccant can be placed in the transport container to prevent container rain.
Classified by nature of raw materials 1. Fine pore silica gel desiccant:
The product has a white, translucent glass body. It is mainly used for drying and moisture proof, and can be used as a catalyst carrier and dehydration purification of organic compounds. Because of its high bulk density and low humidity, the moisture absorption effect is obvious. It can be used as an air purifier to remove moisture from the air to control the humidity of the air. It is also widely used in shipping, and it can also be used as dehumidification between two parallel sealing glass plates to maintain the transparency of the glass.
2, coarse pore silica gel desiccant:
The appearance of the product is white, and there are three types of blocks, spheres and microspheres. The moisture absorption effect is more significant in the environment with higher relative humidity. It is commonly used as dehydrating agent and desiccant, catalyst carrier, and can remove organic acid and water in transformer insulating oil. In addition, due to its large pore size, it is also a raw material for deep processing of silica gel.
3. Blue silica gel desiccant: This product is a highly porous structure. Blue, translucent, moisture-absorbing, its color changes from blue to light red, can be mixed with ordinary fine-hole spherical silica gel as an indicator to indicate the degree of water absorption and saturation of the desiccant, mainly used for drying and moisture absorption.
4, cobalt-free color-changing silica gel desiccant cobalt-free color-changing silica gel desiccant appearance of orange or translucent glassy particles, has a strong ability to absorb moisture and its appearance in the process of moisture absorption will increase with the increase in moisture absorption Color changes. The cobalt-free color-changing silica gel desiccant can be used alone or in combination with fine-pored silica gel (5% or more). When it is not damp, it is orange-yellow. After the moisture absorption, it gradually turns into a light green color. When the moisture absorption continues to become dark green, you need to replace it with new silica gel or regenerate it. The cobalt-free color-changing silica gel desiccant is environmentally friendly without cobalt chloride and is a substitute for blue silica gel.
Specifications: 1-3mm 2-4mm 2-5mm 3-5mm 4-8mm
Packing: 20 or 25kg/bag according to product use 1. Silica gel desiccant for medicinal and food
The standard for silica gel desiccant for pharmaceuticals and foods is mainly in line with the standards for pharmaceutical packaging containers (materials) formulated by the State Food and Drug Administration: "Detergent Standard for Drying Agents for Pharmaceutical Solid Paper", which specifies "Solid Preparation Filter Paper Bags" The requirements of the packaged pore-shaped silica gel desiccant, in addition to the basic performance requirements of the desiccant bag appearance, strength, moisture content of the adsorbent, moisture absorption rate, etc., focus on the content of harmful substances in the desiccant (such as: Arsenic content, etc., microbial limits, decolorization performance, etc. are regulated.
2. Silicone desiccant for shoes and hats
Silicone desiccant for shoes and hats can also be considered as a desiccant for drying and moisture-proof general cargo. The main requirement is that the silica gel desiccant itself cannot contain the prohibited substances in the relevant international standards, and the packaging material has good gas permeability and durability, and at the same time achieves the effect that other desiccants cannot achieve on the adsorption effect.
3. Silicone desiccant for electronic products
Electronic products, especially humidity-sensitive electronic components, also have high requirements for packaging humidity control. The United States Electronic Industry Association (IPC) and the United States Electronic Components Engineering Joint Committee (JEDEC) jointly developed the "moisture-sensitive surface mount components". Packaging and Transportation Processing Standards
J-STD-033b is a widely used comprehensive standard for surface treatment, drying, drying and packaging of humidity sensitive electronic components. Chapter 3 of the standard specifies the dry packaging requirements for these electronic components.
4. Silicone desiccant for containers
The silica gel desiccant for containers is mainly used in shipping containers to adsorb containers in the process of marine transportation or storage. The container will be condensed into water due to the change of ocean high humidity climate and large temperature difference between day and night. The "container rain" formed by the beads reduces the moisture content of the container and prevents the rain from being generated.