Plastic expansion agents have a wide range of application scenarios, mainly concentrated in the following areas:

Building materials:
Plastic expansion agents are widely used in building materials such as concrete and mortar. By adding plastic expansion agents, the fluidity and molding properties of the material can be improved, so that it can better plastically deform during processing and construction.
During the concrete mixing process, plastic expansion agents can make concrete have better fluidity and plasticity, thereby enhancing the fluidity and plasticity of concrete, making the concrete more evenly distributed in the formwork, and reducing problems such as cracks and failures.
By adding plastic expansion agents, the mechanical properties of concrete such as compressive strength, tensile strength and shear strength can be enhanced, and the bearing capacity and crack resistance of concrete can be improved.
Plastic expansion agents can also improve the durability of concrete and improve its impermeability, corrosion resistance and aging resistance. This is particularly important in important projects such as marine engineering and chemical wastewater treatment.
Plastic and rubber fields:
In the processing of plastics and rubber, plastic expansion agents can be used to produce foam plastics, membrane materials, sealing strips, pipes and other products. Its main function is to increase the toughness and pressure resistance of the material.
Plastic expanders can expand plastic materials, thereby increasing their fluidity, improving the mold filling effect during the molding process and the surface quality of the finished product.
In the rubber industry, expanders can be used to manufacture expanded rubber sheets, expanded rubber tubes and other products, which have the characteristics of increasing cushioning performance, reducing vibration and noise, and better waterproof performance.
Food field:
Plastic expanders are also used in food processing, especially in the production of puffed foods, bread, cakes and other foods. It can make food soft and taste good, and increase the palatability of food.
Pharmaceutical field:
In pharmaceutical processing, plastic expanders also play a certain role, making the structure of pills or capsules dense and easy to chew and swallow.
In addition, according to different mechanisms of action and usage scenarios, plastic expanders can be divided into physical expanders and chemical expanders. When using plastic expanders, it is necessary to pay attention to adding them according to the prescribed proportions and methods, and to do sample testing before construction to determine the optimal amount of additives. At the same time, reasonably control the amount of admixture to avoid excessive use, and carry out concrete degassing, vibration and other process treatments according to construction requirements to ensure the quality of concrete.

Plastic expansion agent is an additive used to improve the processing properties of concrete or plastics. The following is a detailed introduction to plastic expansion agents:

Definition and properties
Definition: A plastic expansion agent is a concrete additive or plastic processing aid designed to improve the processing properties of materials or the properties of concrete.
main effect:
For concrete, plastic expansion agents can spread the distance between cement particles, increase the pores and porosity inside the concrete, and make the concrete more uniform, strong and dense.
For plastics, plastic expansion agents can improve the softness, ductility, plasticity and processability of plastics, lower the melting point and viscosity, and improve flow properties.
Main ingredients
Plastic expansion agent in concrete: The main ingredients include hydrated sodium silicate, silicate, aluminate, etc.
Plastic expansion agents in plastics: Common ones include phthalates, phosphates, chlorinated paraffins, etc.
Application areas
Concrete: Plastic expansion agents are widely used in concrete projects to improve the fluidity and workability of concrete and increase its strength and durability.
Plastics: Plastic expansion agents are widely used in the production process of plastic products, such as PVC floors, PVC pipes, PVC wires and cables, etc., to improve the processability and softness of plastics.
Function and effect
Improve the flexibility of plastic products: The addition of plastic expansion agents can cause plastic molecules to diffuse and form gaps, thereby changing the molecular structure, making it softer, and improving bending and strength.
Prevent plastic products from breaking: By making the molecular structure in plastic products more uniform, plastic expansion agents can increase their toughness and prevent breakage and cracking.
Increase conductivity: The addition of plastic expansion agent can dissolve organic lubricating materials from the plastic, making the plastic have a certain degree of conductivity.
type
Concrete expansion agents: including calcium sulfoaluminate expansion agents (such as alunite expansion agents, CSA expansion agents, U-type expansion agents, etc.), calcium oxide expansion agents and metal expansion agents, etc.
Precautions
Although plastic expansion agents can improve the performance of concrete or plastics, excessive use may have a negative impact on the performance of the material, so the amount added should be controlled according to specific needs when used.
Different types of plastic expansion agents are suitable for different materials and processing conditions, and the selection should be based on the specific circumstances.