片材挤出机,片材设备（图示） Automotive interior sheet extruder, sheet equipment (pictured)
The advantage of the two-stage method is that the two phases are more uniformly dispersed.
The motive force for mechanical blending comes from the mechanical agitation and shear provided. Mechanical blending is the homogenization process of the system under the action of mechanical force. Generally, the homogenization process is considered to include the physical mixing and dispersion of the components of the system. In addition to the energy provided by dispersion, it will also trigger a chemical reaction between the components, which has an important effect on the combined performance of rubber and plastic. 片材挤出机,片材设备（图示） 橡塑共混设备主要包括高温开炼机、密炼机、螺杆挤出机和连续混炼机。 Automotive interior sheet extruder, sheet equipment (pictured), rubber and plastic blending equipment mainly include high temperature open mill, internal mixer, screw extruder and continuous mixer. There are two types of continuous mixers: the combination of mixing and extrusion and the combination of rotor and screw. The high-temperature open mill and internal mixer are batch-type mixing equipment, and the screw extruder and continuous mixer are continuous-type mixing equipment. The continuous mixer combines the advantages of an internal mixer and a screw extruder with high production efficiency and will become the most important blending equipment in the future. 虽然了解了橡塑并用的混溶性原则及橡塑共混的方法，但根据人们多年来在共混领域的实践，橡塑共混还需考虑以下因素： 1. 溶解度参数。 Other considerations of rubber and plastic blending Although you understand the miscibility principles and methods of rubber and plastic blending, but according to people's practice in the field of blending for many years, rubber and plastic blending also need to consider the following factors: 1. Solubility parameters. 0 ，因为Δδ越小共混效果越好，而差值小到 0 的话，则不存在两相，也就失去了共混的意义。 Each polymer material has a solubility parameter δ that reflects its intermolecular force. When blending two polymers, the difference in solubility parameter Δδ should be selected as small as possible, but greater than 0 , because the smaller the Δδ, the better the blending effect. When the difference is as small as 0 , there are no two phases, and the meaning of blending is lost. 2. Polarity. When rubber and plastic are used in combination, the traditional approach is to give priority to two polymers with similar polarities and avoid using two polymers with very different polarities, but with the advent of compatibilization technology, this consideration can be eased. 3. Viscosity. Viscosity is a characterization of the average molecular weight of polymer materials. The smaller the viscosity, the smaller the entropy of mixing, resulting in a higher degree of dispersion uniformity and a smaller micro area size. 4. Temperature. Temperature is particularly important for rubber-plastic blending, because plastics are in a crystalline state at normal temperature, and only when the temperature reaches a certain level can crystallization be released and blended. As for the specific temperature value, it depends on the variety. PVC 的熔融温度为 150 ℃，只有当塑胶熔融後才能进入良好的共混状态，否则效果很差。 Such as the melting temperature of PVC is 150 ℃, only when the plastic melts into a good blending state, otherwise the effect is very poor.
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