The specific surface area refers to the total area of ​​the unit mass material, and the specific surface area is one of the important indexes for characterizing the surface physical properties of the micro-nano powder material. The most commonly used measurement method is the nitrogen adsorption method. Solid catalysts in petrochemicals, adsorbents for anti-virus filtration, raw materials for cement, ceramics and powder metallurgy in building materials, electrodes for chemical power sources, geological oil formations, etc. are all solid powders or porous materials. These solids have large specific surface areas and many pores of different sizes and shapes. During use, their physical and chemical processes are carried out in these surfaces and pores. Therefore, the parameters of the specific surface area of ​​the solid are tested in production. And scientific research is of great significance. For example: battery materials, magnetic materials, catalysts, adsorbents, cement, ceramic raw materials, metallurgical raw materials, carbon black, white carbon black, inorganic materials, abrasives, coatings, nanomaterials, pharmaceutical powders, rare earths, porous materials, composite materials, etc. Body and particulate materials, etc., need to measure specific surface area in production and research. The JB-2020 specific surface area tester uses the nitrogen adsorption dynamic method to determine the specific surface area of ​​the powder. There are common principles in the dynamic method instrument: direct comparison method and multi-point BET method; the instrument structure is reasonable, the performance is stable, the precision is high, and the test speed fast. In the dynamic method, the powder sample to be tested is placed in a U-shaped sample tube, and a mixed gas containing a certain proportion of adsorbate is passed through the sample, and the adsorption of the adsorbed molecule (N2) on the sample to be tested is determined according to the change of the gas concentration before and after the adsorption. the amount; The static method is divided into the weight method and the volume method according to the method of determining the adsorption adsorption amount; the gravimetric method determines the adsorption amount of the sample to the adsorbate molecule (N2) according to the change of the sample weight before and after adsorption, due to the low resolution and accuracy. Defects such as poor requirements and high equipment requirements are rarely used. The volumetric method is to load a sample of the powder to be tested into a closed tube-shaped sample tube of a certain volume, and inject a certain pressure of the adsorbate gas into the sample tube, and determine the sample to be adsorbed by the pressure or weight change before and after the adsorption. (N2) adsorption amount; The purpose of both the dynamic method and the static method is to determine the amount of adsorption of the adsorbate gas. After the adsorption amount of the adsorbate gas is determined, the specific surface of the powder to be tested can be calculated from the adsorption amount of the adsorbate molecule.
Reborn PLLA Dermal Filler is a injectable facial filler made of Poly-l-lactic acid that can stimulate collagen regeneration restores volume to sunken cheeks and firmness to sagging skin of the jawline to create a smooth and natural effect .
As one of the Beauty Equipments,Reborn PLLA Dermal Filler is widely used for Beauty & Personal Care,Plastic surgical and dermatology.
Reborn PLLA Dermal Filler is a collagen stimulating product. Reborn is made with a substance called Poly-L-Lactic Acid (PLLA). PLLA is a polymerized form of lactic acid, which is a product of sugarcane. It is a biodegradable synthetic substance that is biocompatible to humans. Lactic acid polymers have been used for many years to produce absorbable surgical sutures (stitches) that gradually dissolve over time.
Reborn is made of small, microspheric particles of this material(biomedical materials). It is mixed with sterile water and injected just beneath the skin. Over time, the body produces collagen around these small particles as they slowly dissolve. The result is increased volume in the treated area of the face or body.
The particle size of Reborn PLLA dermal filler is 3-10 microns.Easy pass 30G needle, never blocking.
There are 4 contents: 150mg/vial,240mg/vial,360mg/vial,500mg/vial.
Just need 10 minutes to dissolve .
The effect can keep more than 2 years
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