Wuhan Handern Hybrid Technology and Equipment
DATE：2020/8/12 8:59:06 / READ： / SOURCE：This station
Wuhan Handern Hybrid Technology and Equipment
1. Wuhan Modern Hybrid Theory
Mixing refers to a process in which resins, stabilizers, plasticizers, lubricants, fillers, colorants and other additives are closely gathered together. It includes operation methods such as kneading, grinding and stirring. Dispersion is the deepening of mixing, a process in which the physical properties of the mixed composition undergo some basic changes. Generally refers to plastic refining operations. Mixing and dispersion are usually carried out simultaneously. www.handern.com Meltblown non-woven equipment
Mixing, in theory, is to change the non-incidental material distribution and increase the probability of any component particles in any small sampling volume in the entire continuum involved. In the mixing and dispersion process, the thermoplastic material is regarded as a fluid. The flow form of the mixing process belongs to the concept of laminar flow. With the help of the shear and tension of the mixing element, the interface area between the components is increased, and the average thickness of the stream stripes of any component is reduced, until the stream stripes are so small that they cannot be observed by naked eyes compared with the total volume. Therefore, the three main factors that control the completeness of solid/liquid mixing are www.handern.com meltblown nonwoven equipment
(1) The interface area between the components must be increased during mixing. www.handern.com Meltblown non-woven equipment
(2) The components of the interface zone should be universally distributed in the wave mixing system. www.handern.com Meltblown non-woven equipment
(3) The ratio of the components distributed in any random volume is the same as the whole system. www.handern.com Meltblown non-woven equipment
The method of describing the end point of the mixing is generally to use the naked eye to check the uniformity of the color, the spots, streaks, bubbles, and hand feeling of the material. Samples can also be hot pressed into test pieces to determine the thermal aging properties to compare the effects of different process conditions on the uniformity of the stabilizer dispersion. The main methods for determining the degree of dispersion include electrical properties, rheological properties and chemical reactions. The measurement of rheological properties is most effective for predicting extrusion and injection molding behavior. For example, the melt flow and melt degree measured by the melt index meter and Brabender plasticity are used as the quality control parameters for mixing and fractionation. www.handern.com Meltblown non-woven equipment
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