Filler specific surface area test
Fillers are also called fillers and extenders. Some fillers are also body pigments. The filler of the micro button has good hiding power, and is often used in the coating industry. The filler can be used in a variety of polyurethane products, such as polyurethane coating, sealant: polyurethane slurry, special elastomer i polyurethane foam. Melamine plant fiber polymerization, ginseng polyhydric alcohol, etc., organic fillers can be used for polyurethane foam; calcium carbonate kaolin (terracotta, · porcelain clay), molecular sieve powder talc powder wollastonite Yanji titanium white powder j barite powder (barium sulfate) 'etc. The fine inorganic powder is generally used as polyurethane sealant, polyurethane flexible foam polyurethane elastomer, adhesive. Fillers for polyurethane coatings, etc. Generally refers to the material filled in other objects. In chemical engineering, packing refers to the inert solid materials contained in the packed tower, such as Bauer ring and Raschig ring. Its function is to increase the gas-liquid contact surface and make it mix strongly with each other. In chemical products, fillers, also known as fillers, refer to solid materials used to improve the performance of fillers (5 sheets), mechanical properties of products and / or reduce costs. Among them, fillers that can significantly improve the strength of the product, such as long fibers and whiskers, are often called reinforcement materials, and carbon black is called a reinforcing filler. Solid tablets and calcium carbonate are often added as fillers in pharmaceutical tablets, cosmetics and detergents, but the purpose is to adjust the dosage and concentration rather than improve performance, so it should be called a diluent. Although plastic plasticizers, rubber oil filling, and spinning oils can improve performance and affect costs, these liquid materials are traditionally regarded as processing aids. In polymer chemical industry, fillers (fillers) are the most widely used additives. Almost all plastics (including thermoplastics and thermosetting plastics), natural rubber and coatings use a large amount of fillers. For example, adding wood powder, clay or calcium carbonate when manufacturing plastics can not only improve the mechanical properties and increase the hardness of the products, but also reduce costs; using graphite, magnetic powder or mica as fillers can improve the electrical conductivity, magnetic permeability and resistance of plastics Heat; adding carbon black or silica (white carbon black) to the rubber can significantly improve the physical properties of the product; adding titanium dioxide (titanium dioxide) to the spinning solution can shade and dye. In the coating industry, white or colored fillers (such as titanium dioxide, talc, calcium carbonate, barium sulfate, etc.) are often added to improve the optical, physical and chemical properties of the coating. The fillers (fillers) for such uses are called body pigments or Exhibition color.
The performance of the filler mainly depends on: â‘ has a large specific surface area (m2 / m3 filler layer) (filler specific surface area test is tested by 3H-2000 series specific surface area instrument); â‘¡ the liquid is better on the surface of the filler Uniform distribution performance; â‘¢ Air flow can be evenly distributed in the filler layer; â‘£ The seasoning has a large void ratio (m3 / m3 filler layer). In addition, the selection of fillers should also consider factors such as its mechanical strength, source, manufacturing and price.
The role of fillers increases the viscosity of the material, especially fiber fillers significantly increase the viscosity. The filler before addition needs to be dehydrated to avoid the consumption of some isocyanate. It must be noted that the generation of carbon dioxide will cause foaming of the resin and affect the physical properties of the polyurethane resin. In order to accelerate the wetting speed of the filler, and at the same time reduce the viscosity of the system, or add more filler to the polyurethane resin, sometimes we need to add a wetting and wetting dispersant to the resin in advance. In-mold paint is an auxiliary agent with three functions of paint, color paste and mold release agent. It is evenly sprayed in the mold. After the paint film is dried, you can mold polyurethane soles, self-skinned foam plastics, and soft polyurethane foam. After the hard foam products are demolded, the color paint is attached to the molded products.
There are many types of fillers. Metal powders such as aluminum powder, zinc powder, copper powder, and silver powder can be used as conductive fillers. Cement, fly ash, etc. can also be used as fillers. Wood powder, starch and other plant powders can also be used as fillers. Calcium fluoride can be used in a small amount in polyurethane adhesives and sealant systems; it also has the function of carbon dioxide absorbent. Generally speaking, fine powder fillers or modified fine fillers, as well as fibrous and flake fillers, can be used in small amounts to improve their overall performance. For example, for elastic polymers (such as rubber, polyurethane elastomers) Reinforcing effect, increase modulus, strength, abrasion resistance, heat resistance, improve its dimensional stability, and can also appropriately increase strength and aging resistance for hard products. However, if the amount of use is too large, the physical properties are reduced, and the operation is difficult when the filler content is large. There are several types of packing: according to the different ways of packing, it can be divided into bulk packing and structured packing.
The specific surface area of ​​the filler is an important parameter. The specific surface area is the surface area per gram of solid material, the unit is m2 / g; the national standard of the specific surface area tester is the low temperature nitrogen adsorption BET multi-point method based on the BET theory (GB / T 19587-2004). The main points of measuring the specific surface area by the nitrogen adsorption BET multipoint method are: in the range of 5-30% nitrogen partial pressure, the amount of nitrogen adsorbed by the adsorbent (powder to be measured) is measured at different nitrogen partial pressure points to make adsorption For the isotherm, the saturated adsorption amount of the monolayer corresponding to the surface of the adsorbent when the monolayer is covered with nitrogen molecules is calculated by the BET formula, and the specific surface area of ​​the adsorbent can be calculated. The 3H-2000BET-A specific surface area measuring instrument is a high-precision analytical instrument based on the national specific surface testing standard, and has 7 domestic leading technologies; such as the only integrated in-situ purge processing function in China, which is designed for chromatographic specific surface testing The problem of purging treatment between different nitrogen partial pressure points of the nitrogen gas makes the purging treatment between different nitrogen partial pressure points more convenient and efficient, reducing the impact of continuous testing on accuracy; the only program-controlled wind and heat removal device in China To ensure sharp and rapid desorption peaks and reduce background errors after being fully automated; the only chromatographic concentration detection system in China that improves the accuracy of nitrogen partial pressure detection by 10 times relative to the flow method; six-way valve sampler program control , The only domestic quantitative control program switching function; the only domestic particle size report and other functions; while the instrument parameter software is displayed, the large-screen LCD hardware display on the instrument makes the instrument working status parameters clear and the operation is more reliable; and liquid nitrogen temperature monitoring , Detector gas protection, detector constant temperature device, sound prompt of important links, make 3H-2000BET-M specific surface instrument It achieves and partially surpasses the performance of similar foreign instruments in terms of test accuracy, stability, safety, and ease of operation. The 3H-2000 series surface analyzer has a large number of customers in China and is a well-known brand of surface analyzers.
Our factory have many different kind of glass french press, some with stainless steel frame and plastic handle, some items with bamboo handle and lid, some items is color painting.
The material of the glass french press is Heat Resistant Borosilicate Glass ,the quality is excellent and customer review is good.
We can provide the OEM product, If you have any questions, please contact with us directly. Will sent the catalog for your reference and recommend the suitable one for you.
Description of Glass French Press
Size : 0.35L/0.8L/1L
Material: Body: Borosilicate Glass +SS201/SS304/Iron
Lid and Handle: SS201/SS304/Iron/Wood
Color :customized
Finishing: Satin polishing ,Mirror Polishing ,Color painting
Logo: Laser logo, Etching logo, Silk printing logo, Embossed logo, Decal logo
MOQ : 2000 PCS
Packaging : White box, Mail box or Customized package
Sample Time : 7~10 days
Lead Time :60 days after have the deposit
Payment: T/T ,L/C or others
Payment term: 30% deposit before production and 70 % balance against the copy B/L
FAQ:
1:How can I get the sample?
We can provide the sample for customers to check the quality.
Please kindly provide the delivery info for calculate the sample cost. If you have DHL /TNT/UPS/FEDEX account, please also kindly provide it to us.
You can do the payment of sample via T/T and PayPal.
2:How about the sample time?
Usually the sample time is 7~10 days after have the sample cost.
3:How long will it take for mass production?
Usually 45~60 days after have the deposit.
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