The tensile strength of rubber is the ultimate ability of rubber products to resist tensile failure. It is one of the important indicators of rubber products. The life of many rubber products is directly related to tensile strength. 1. Tensile strength is related to the molecular structure of rubber. All other factors that affect intermolecular forces have an effect on tensile strength. When the molecular weight is smaller, the secondary bonds of intermolecular interactions are smaller. When the external force is greater than the intermolecular action, intermolecular sliding will occur and the material will be destroyed. On the contrary, if the molecular weight is large, the intermolecular force increases, the cohesion of the rubber compound increases, the chain segment is not easy to slide during stretching, and the degree of damage to the material is small. 2. Reinforcing agent is one of the important factors affecting tensile strength. The smaller the diameter of the filled material, the larger the specific surface area, the larger the surface activity, the higher the structure, and the better the reinforcement performance. 3. Different softeners have different degrees of reduction in tensile strength. Adding softener will reduce the tensile strength, but adding a small amount, generally less than 7 parts in the open kneader, and less than 5 parts in the compact mixer will improve the dispersion, which is beneficial to improve the tensile strength. 4. Tensile strength is also related to temperature. The tensile strength at high temperature is much lower than that at room temperature. 5. The tensile strength is related to the crosslinking density. With the increase of cross-linking density, the tensile strength increases, and after the maximum value appears, the tensile strength will decrease significantly.

Most of the reinforcing agents are used to improve or meet the performance requirements, such as carbon black and white carbon black; while the fillers are mainly to reduce the cost of rubber materials; It is obtained through fine craftsmanship, while the filler is directly obtained from natural minerals, which are generally obtained through relatively simple and rough mechanical processing (mainly crushing and mechanical grinding). Due to the different use effects of the two types of materials, the costs and costs paid are also very different. However, there are similarities between the two types. Therefore, for a long time, people have sought to take both mechanical processing and chemical modification into consideration, that is, using fillers as raw materials, performing fine mechanical processing and surface chemical treatment, to obtain performance and use. Materials whose effects are close to those of reinforcing agents, but whose cost is between the two, are customarily referred to as "reinforcing fillers". In recent years, with the development of various rubber products, the varieties and dosages of modified and improved reinforcing fillers are increasing day by day, becoming a new category in rubber compounding agents. Therefore, the promotion and application of reinforcing fillers is of great significance, which can be briefly summarized as follows: 1. It helps to reduce the consumption of petroleum energy. The most widely used reinforcing material in rubber is carbon black, and the manufacture of carbon black is inseparable from the supply of petroleum cracking oil, natural gas and other energy sources. Partial replacement of carbon black by strong fillers is equivalent to saving a considerable amount of non-renewable petroleum resources. 2. After the reinforcing filler is used in low-grade products, some key properties are improved and improved, which can play the role of "product upgrade and make the best use of everything." 3. Compared with the production of carbon black, white carbon black and other traditional reinforcing agents, the energy consumption can be greatly reduced. 4. In line with the general development direction of social production such as "protecting the ecological economy", and contributing to the realization of the low carbonization of the rubber industry.

Pigments are materials used as colorants for paints, inks, plastics, rubber, adhesives, dyes, and ceramics and building materials, and are generally insoluble in water, oil or solvent. It is a white or colored inorganic or organic compound that is dispersed in the medium (or base material) in the form of fine particles during application. Pigment particles themselves do not have the ability to dye objects, but are fixed on the surface of objects or finely dispersed in the base material to achieve coloration, and play the role of decoration and protection (such as anti-rust, anti-corrosion, anti-radiation, etc.). Non-metallic mineral pigments are inorganic fillers. Except for pearlescent mica, most non-metallic mineral pigments are extender pigments, which have both coloring and filling functions. They are widely used in coatings, paper products, rubber, plastics, inks and other fields. In addition to coloring, non-metallic mineral fillers have the following functions: 1. Increase the thickness of the coating film, improve the wear resistance, weather resistance, heat resistance, chemical corrosion resistance, scrub resistance and other properties of the coating, and play a skeleton role in coatings and inks while adjusting the light absorption or reflection properties of the coating. 2. Increase the whiteness and opacity of the paper, and improve the writing performance and printing performance or ink absorption performance of the paper. 3. Improve the wear resistance, weather resistance, heat resistance, flame retardation, flame retardant and optical properties of rubber and plastic products. 4. Improve the physical properties of the adhesive, such as reinforcement, rheology, increase opacity and give it flame retardant and electrical insulation properties. 5. Reduce production costs. Generally, the price of non-metallic mineral pigments is lower than that of other inorganic pigments, and the amount of addition is larger.

In order to better expand the market and reduce the production cost of new and old customers, the company's newly developed product "superfine composite enhanced powder" has been officially put into production. Welcome new and old customers to inquire and negotiate, Tel: 0795-2506333, 15879567389 New Product Features: Ultrafine composite reinforced powder is specialized in inorganic reinforced powder produced in the rubber and plastic industries. It can improve the hardness, toughness, bending strength, weather resistance and scratch resistance of material products. It has the functions of weight gain and reinforcement, and is more effective reduce production costs.

The reason why the powder flows, its essence is the imbalance of the force on the particles in the powder. The force of particles includes gravity, adhesion force between particles, friction force, electrostatic force, etc. The most important influence on powder flow is gravity and adhesion force between particles. By analyzing the influencing factors of powder fluidity, it is of great significance to use scientific methods to measure powder fluidity. The factors that affect the fluidity of powder are as follows: 1. Granularity The specific surface area of ??the powder is inversely proportional to the particle size. The smaller the particle size of the powder, the larger the specific surface area. As the particle size of the powder decreases, the molecular attraction and electrostatic attraction between the powders gradually increase, which reduces the fluidity of the powder particles; secondly, the smaller the particle size of the powder, the easier the particles are adsorbed, aggregated into agglomerates, and bonded together. The increase of the air permeability leads to the increase of the angle of repose and the deterioration of the fluidity. Thirdly, the particle size of the powder decreases, and it is easy to form a close packing between the particles, which reduces the air permeability, the compression rate and the fluidity of the powder. 2. Form In addition to particle size, the effect of particle morphology on flowability is also very significant. Powders with the same particle size and different shapes have different fluidity. Obviously, spherical particles have the smallest contact area with each other and have the best fluidity. The surface of the needle-like particles has a large number of plane contact points and shear force between irregular particles, so the fluidity is poor. 3. Temperature Heat treatment can increase the bulk density and tap density of the powder. Because the density of powder particles will increase after the temperature rises, but when the temperature rises to a certain level, the fluidity of the powder will decrease, because the adhesion of the powder increases significantly at high temperature, and the gap between the powder and the powder increases. Or adhesion occurs between the powder and the vessel wall, which reduces the fluidity of the powder. If the temperature exceeds the melting point of the powder, the powder will turn into a liquid, making the adhesion stronger. 4. Moisture content When the powder is in a dry state, the fluidity is generally good. If it is too dry, the particles will attract each other due to electrostatic action, which will deteriorate the fluidity. When a small amount of water is contained, the water is adsorbed on the surface of the particles and exists in the form of surface adsorbed water, which has little effect on the fluidity of the powder. As the water continues to increase, a water film is formed around the particles adsorbed by the water, and the resistance to the relative movement between the particles increases, resulting in a decrease in the fluidity of the powder. When the water content exceeds the maximum molecular bound water, the more water content, the lower the fluidity index and the worse the powder fluidity. 5. Interaction between powder particles Powders with different particle sizes and shapes have different influences on the powder fluidity by their cohesion and friction. When the powder particle size is larger, the powder fluidity mainly depends on the powder shape, which is Because the volume force is much greater than the cohesion between the powder particles, the powder particles with rough surface or the powder particles with uneven shape have poor fluidity. When the powder particles are small, the fluidity of the powder mainly depends on the cohesion force between the powder particles, because the volume force at this time is much smaller than the cohesion force between the particles.