China Xiamen Juguangli Import & Export Co., Ltd Company News

As more and more organic silicon products become popular in the market, there are inevitably advantages and disadvantages. After using some silicone products for a period of time, they may feel that the surface is not smooth enough and there is still a sticky feeling, especially in kitchen utensils. Or the silicone phone case is very obvious. What are the reasons for the uneven surface of silicone products?   1. Caused by raw material issues or improper maintenance. It is unreasonable to control and use curing agents during the mixing process of raw materials. The amount of curing agent added is not fully cured, resulting in a sticky surface of the product. During the kneading process, the curing agent and silicone gel are unevenly stirred, and the mold solidifies while curing, causing deformation of the product due to differences in hardness and hardness after vulcanization. When cleaning the machine, if the mold is not cleaned, it will not be smooth enough. The residue in the mold can cause unevenness in the product, making the surface of the product uneven. 5. No secondary vulcanization Spraying hand oil, etc., which means insufficient post-processing. In short, the production of silicone products should pay attention to every detail to avoid unnecessary cost waste.

Conductive adhesive is a commonly used type of adhesive in most electronic conductive products, mainly used for thermal sensing, suitable for precision lead assembly, low-temperature connection, especially for interconnection of thermal sensitive components, and also has good flexibility and fatigue resistance. It is widely used in adhesives. However, silicone rubber and conductive silicone are currently the most commonly used types of adhesive in products. In the production process of silicone product manufacturers, they have different production differences in performance, and the specific differences are as follows:   Conductive silicone products: Conductive adhesive is widely used in electronic assembly sensing, including thin wires and printing materials, electroplated substrates, metal layers of ceramic adhesives, metal chassis bonding, bonding wires and sockets, bonding components and flat holes passing through printed circuits, bonding waveguide tuning and hole repair, etc. All of these functionalities are derived from its material blending characteristics, including fillers such as silver or copper, nickel, carbon powder, etc., which achieve conductivity. Among them, adhesive strength additives and rheological promoters are their main additives, thus creating the advantages and disadvantages of conductive silicone.   The production of ordinary silicone and conductive silicone still has certain differences in performance. In terms of silicone product processing, ordinary silicone has faster efficiency, lower defect rate, and different yield performance. The tensile toughness of ordinary silicone is generally better than that of conductive silicone, while conductive silicone is affected not only in terms of conductivity, but also in terms of toughness and material life. Its corrosion resistance, high and low temperature resistance, wear resistance, and electrical insulation aging all decrease.

Generally speaking, silicone products have good sealing effects after production, and they are made of silicone raw materials that are also resistant to high temperatures. Therefore, silicone products are relatively easy to store. However, in many cases, customers will purchase a large amount of silicone products, and it is inevitable that dust will fall in the warehouse storage for a long time. So how to store silicone products?   Storage methods and precautions for silicone products We need a cool and dry environment, and if necessary, we can install air conditioning and temperature and humidity monitoring devices for daily checks. Secondly, the mixed rubber materials cannot be directly stacked together and need to be coated with a separating agent on the surface to prevent the raw materials from sticking together. Next, finished and semi-finished silicone rubber products should be labeled with dust-free bags, sealed and packaged in a way that does not come into direct contact with air, which can accelerate product aging and whitening. The rubber raw materials that have been added with vulcanizing agents should be well managed and generally stored for no more than 15 days. They should be used up in a timely manner before expiration. 1. Anti fouling Keep the silicone raw materials clean, as any stains on the raw materials can lead to the scrapping of silicone products, which is also one of the main reasons directly affecting the appearance of silicone products. 2. Waterproof Once silicone raw materials enter the water, it is easy to cause bubbles in the molding process of silicone products. Therefore, silicone product manufacturers not only need to ensure the waterproofness of the warehouse when storing raw materials, but also need to regularly check the dryness and wetness of the silicone raw material room; 3. Mold proof Long term storage of silicone products or silicone raw materials may cause mold growth due to the humid and hot environment in the warehouse. Once the silicone undergoes mold growth, it will lead to product deformation or loss of elasticity; Dry ventilation in the warehouse is also a key issue that silicone product manufacturers need to pay attention to; 4. Sunscreen We usually need to pay attention to the possibility of high temperature exposure when transporting silicone raw materials or products, and take corresponding sun protection measures for corresponding situations to prevent silicone products from accelerating aging under high temperature exposure for a long time; In summary, the storage of silicone products requires a cool and dry environment, and the packaging should be sealed as much as possible to avoid direct contact with air. Attention should also be paid to the waterproof, anti fouling, and anti mold storage of silicone products. The above is the method of storing silicone products. I believe everyone has gained some understanding after reading it.

How to store silicone products? Generally speaking, silicone products have good sealing effects after production, and they are made of silicone raw materials that are also resistant to high temperatures. Therefore, silicone products are relatively easy to store. However, in many cases, customers will purchase a large amount of silicone products, and it is inevitable that dust will fall in the warehouse storage for a long time. So how to store silicone products?   Storage methods and precautions for silicone products We need a cool and dry environment, and if necessary, we can install air conditioning and temperature and humidity monitoring devices for daily checks. Secondly, the mixed rubber materials cannot be directly stacked together and need to be coated with a separating agent on the surface to prevent the raw materials from sticking together. Next, finished and semi-finished silicone rubber products should be labeled with dust-free bags, sealed and packaged in a way that does not come into direct contact with air, which can accelerate product aging and whitening. The rubber raw materials that have been added with vulcanizing agents should be well managed and generally stored for no more than 15 days. They should be used up in a timely manner before expiration. 1. Anti fouling Keep the silicone raw materials clean, as any stains on the raw materials can lead to the scrapping of silicone products, which is also one of the main reasons directly affecting the appearance of silicone products. 2. Waterproof Once silicone raw materials enter the water, it is easy to cause bubbles in the molding process of silicone products. Therefore, silicone product manufacturers not only need to ensure the waterproofness of the warehouse when storing raw materials, but also need to regularly check the dryness and wetness of the silicone raw material room; 3. Mold proof Long term storage of silicone products or silicone raw materials may cause mold growth due to the humid and hot environment in the warehouse. Once the silicone undergoes mold growth, it will lead to product deformation or loss of elasticity; Dry ventilation in the warehouse is also a key issue that silicone product manufacturers need to pay attention to; 4. Sunscreen We usually need to pay attention to the possibility of high temperature exposure when transporting silicone raw materials or products, and take corresponding sun protection measures for corresponding situations to prevent silicone products from accelerating aging under high temperature exposure for a long time;   Silicone products require a cool and dry environment for storage, with sealed packaging as much as possible to avoid direct contact with air. Attention should also be paid to waterproof, anti fouling, anti mold and other storage precautions for silicone products. The above is the method of storing silicone products. I believe everyone has gained some understanding after reading it.

Performance Aging-resistance Weather resistance: EPDM rubber can maintain good performance under various climatic conditions, such as high temperature, low temperature, sun exposure, rain, wind and frost. This is because there are no unsaturated double bonds in its molecular chain, making it less prone to aging reactions such as oxidation and ozone cracking. For example, EPDM rubber products that are exposed outdoors for a long time, such as car window seals, can still maintain elasticity after years of exposure to sunlight and rain, and will not easily crack or harden. Heat resistance: In high temperature environments (up to around 150 ℃ for continuous use), its physical and chemical properties are relatively stable. Can be used to manufacture rubber products that work in high-temperature environments, such as rubber components in car engine compartments. Chemical Resistance It has good tolerance to most media such as acids, bases, salts, and water. For example, it can be used to make sealing gaskets for chemical pipelines, which can prevent leakage and ensure the safe operation of pipeline systems when transporting liquids containing acidic or alkaline substances. Low temperature resistance It has excellent low-temperature resistance, low glass transition temperature, and can maintain a certain degree of elasticity at around -50 ℃. This allows it to function normally even in cold environments, such as in northern cold regions where sealing materials for buildings can prevent the intrusion of cold winds and air. Insulation EPDM rubber is a good electrical insulation material, characterized by high insulation resistance, low dielectric constant, and low dielectric loss. It can be used to manufacture insulation layers for wires and cables, ensuring the safety of current transmission and reducing energy loss. elasticity Has good elasticity and tensile strength. The tensile strength can reach 15-18MPa, and the elongation can reach 400% -500%. Capable of withstanding significant deformation without easily breaking, suitable for making various rubber products that require elasticity, such as rubber springs, seals, etc. advantage Excellent comprehensive performance: EPDM rubber combines various excellent properties such as aging resistance, chemical corrosion resistance, high and low temperature resistance, etc. It stands out among many synthetic rubbers in terms of comprehensive performance and can meet the requirements of various complex working conditions. High cost-effectiveness: Compared with some high-performance but expensive specialty rubbers, EPDM rubber is relatively reasonable in price and can achieve good performance in many application scenarios, with high cost-effectiveness. For example, in the automotive industry, a large amount of EPDM rubber is used to manufacture various seals, shock absorbers, etc., which not only ensures the performance quality of automotive components, but also plays an advantage in cost control. Good processing performance: The mixing, rolling, extrusion molding, and vulcanization processes of EPDM rubber are relatively easy, and various vulcanization methods can be used, such as sulfur vulcanization, peroxide vulcanization, etc., which can meet the needs of different production processes and facilitate the production of rubber products of various shapes and sizes. Good environmental friendliness: It does not contain harmful substances such as halogens, and does not produce a large amount of toxic gases when burned, making it relatively environmentally friendly in waste disposal.

How to solve the problem of difficult demolding of silicone products? Silicone products are widely used in industries such as medical, food, electronics, and automotive due to their excellent high temperature resistance, aging resistance, environmental friendliness, and non toxicity. However, difficulty in demolding is a common problem encountered by many silicone product manufacturers and users during the production process. Difficulty in demolding not only affects production efficiency, but may also lead to product damage or mold wear. Reasons for difficulty in demolding silicone products The surface of the mold is rough The surface of the mold is not smooth enough or has scratches, which increases the friction between the silicone and the mold, making demolding difficult. Improper use of release agent Inappropriate selection or uneven application of release agent cannot effectively reduce the adhesion between silicone and mold. Silicone material issue Inappropriate hardness, viscosity, or vulcanization time of silicone materials may lead to difficulties in demolding. Unreasonable mold design Complex mold structure or improper design of demolding angle can increase the difficulty of demolding. Improper vulcanization temperature and time Excessive vulcanization temperature or time may lead to excessive curing of silicone, increasing the difficulty of demolding. The method to solve the difficulty of demolding silicone products 1. Optimize the surface treatment of molds Polish the surface of the mold to ensure it is smooth and scratch free, reducing the friction between the silicone and the mold. For complex molds, electroplating or coating techniques can be used to further improve the smoothness of the mold surface. 2. Proper use of release agent Choose a suitable release agent for silicone products, such as water-based release agent or oil-based release agent. Apply release agent evenly to avoid excess or insufficient. Excessive use may result in surface residue on the product, affecting its appearance; If it is insufficient, the demolding effect cannot be achieved. 3. Adjust the silicone material Select the appropriate silicone material according to product requirements, ensuring its hardness, viscosity, and vulcanization time are moderate. For high viscosity silicone, an appropriate amount of diluent can be added to reduce its viscosity and facilitate demolding. 4. Improve mold design Optimize the mold structure and minimize complex shapes and deep cavity designs as much as possible. Reasonably design the demolding angle, usually recommending a demolding angle between 1 ° -3 ° to reduce demolding resistance. 5. Control the vulcanization process According to the characteristics of silicone material, set the vulcanization temperature and time reasonably to avoid excessive curing. Use a temperature control system to ensure temperature stability during the vulcanization process. 6. Use auxiliary demolding tools For large or complex silicone products, tools such as demolding pliers and demolding air guns can be used to assist in demolding. Design a ejector pin or ejector device in the mold to assist in the smooth demolding of silicone products.   Difficulty in demolding silicone products is a common but solvable problem. By optimizing the surface treatment of molds, using release agents correctly, adjusting silicone materials, improving mold design, controlling vulcanization processes, and using auxiliary release tools, the difficulty of demolding can be effectively reduced, and production efficiency and product quality can be improved.  

Whether high hardness products will be difficult to produce during the production process is also a concern for many customers. If the hardness requirements of the product are relatively high, whether it can achieve the desired effect is very important! Is it easier to produce products with higher hardness in the silicone industry? Is there such a statement. From the perspective of silicone product manufacturers, the hardness range and effectiveness of silicone products are the core focus, and for producing products with high hardness materials, it is also necessary to see if they are suitable for your product. Therefore, the methods required for each product are different depending on its structure. If your product is relatively simple, with high wheel angles and thickness on the structure, it is not easy to tear, and high hardness products can be adapted to it! High hardness products are suitable for use with simple structures that are not easily folded or torn. However, with the continuous advancement of technology, some processing problems of high-hardness silicone are gradually being solved. For instance, by improving the production process, adding special additives or using new types of silicone materials, the processing performance and product quality of high-hardness silicone can be enhanced.  

Silicone gaskets, due to different application environments, have become a phenomenon in various fields. They cannot be used for a long time and have different effects. For example, some buffer gaskets are subjected to long-term stress and compression, and their lifespan is greatly reduced due to environmental factors. However, when it comes to material selection, have you really distinguished between silicone and rubber materials?   When it comes to silicone and rubber materials, both can be used in the same application environment. However, with changes in physical environment and requirements, the performance of the two materials may differ significantly, but it takes time to show. Therefore, in order to avoid consumers encountering this phenomenon, it is completely possible to prevent it in advance and judge the difference in materials. Silicone rubber products are not easy to distinguish from rubber products in terms of odor, texture, color, hardness, and softness. Generally, they can be distinguished with the naked eye. However, if you are not confident, you can use fire. If the smoke is black and pungent, it is rubber, and if the smoke is white, it is silicone material.   At present, silicone rubber gasket products have been widely used in various fields and are practical in different industries, including daily life. Therefore, the judgment of material is important because pure rubber has a certain harm to the human body and the impact is not significant. However, there are differences in the properties of the material and the price. Therefore, the distinction between daily silicone gaskets and silicone products is still quite important. Silicone material is an environmentally friendly and non-toxic chemical material that can be used in different occasions and regions, while rubber material is different. It is mainly used for industrial manufacturing, electronic internal components, and has little contact with daily necessities. Therefore, in synthetic rubber, as a material that comes into contact with the human body, silicone rubber raw material is basically used. Its good chemical stability, flexibility, and service life are considered excellent materials, and judging its authenticity is a relatively important issue!

Raw material selection and modification Selecting appropriate silicone rubber varieties: Methyl vinyl silicone rubber has good comprehensive performance and can be optimized in terms of vinyl content, molecular weight, and distribution. For example, methyl vinyl silicone rubber with an vinyl content of 8% -15% can form more uniform crosslinking points and improve toughness. Introducing modified fillers: Nano scale gas-phase white carbon black is a common reinforcing filler, which can form a three-dimensional network structure when added at a dosage of 25-35phr. It can also be used in combination with other nano fillers such as carbon nanotubes and nano titanium dioxide to further improve toughness. Adding toughening agent: Hydroxy terminated polydimethylsiloxane is an effective toughening agent, usually used in an amount of 8-12 phr. It can undergo reversible phase separation under stress, absorb energy, and improve toughness. Optimization of cross-linking system Choosing the appropriate catalyst: Platinum catalyst has high activity and controllability, which can achieve a more uniform cross-linked network and improve toughness. Control crosslinking density: Reasonably control the dosage of crosslinking agent and vulcanization process parameters to maintain the crosslinking density within an appropriate range, such as generally controlled at around 4 × 10 ⁻⁶ mol/cm ³. Process parameter control Rubber mixing process: Ensure uniform mixing of the rubber material, avoid local cross-linking or insufficient mixing, and control the mixing temperature and time to prevent premature vulcanization or performance degradation of the rubber material. Sulfurization process: Select appropriate vulcanization temperature and time based on the thickness, shape, and purpose of the product. For thick products, lower temperature and longer vulcanization time can be used to ensure sufficient vulcanization reaction and improve the toughness and strength of the product. Surface treatment and post-treatment Surface treatment: By using ion beam surface treatment and other methods, a nano level strengthening layer can be formed on the surface of silicone rubber products to improve surface hardness and wear resistance, thereby indirectly enhancing the toughness of the products. Post treatment: Proper post-treatment of vulcanized silicone rubber products, such as 24-hour stress relaxation treatment in a 120 ℃ silicone oil bath, can eliminate residual stresses inside the product, improve its dimensional stability and toughness.

Ordinary silicone rubber has good elasticity. Generally speaking, within the normal range of use (i.e. within the boundary between elastic deformation and plastic deformation), it can be well restored to its original shape. For example, common silicone rubber phone cases can mostly return to their original shape when subjected to external compression and deformation during normal use. This is because the molecular chain structure of ordinary silicone rubber is within the elastic limit, and the molecular chains can move freely between each other. When the external force is eliminated, the molecular chains can return to their original relatively ordered state.   Slight deformation If the silicone rubber product only undergoes slight deformation, that is, within its elastic deformation range, it can usually be fully restored. Elastic deformation refers to the deformation of a material under stress, and when the external force is released, the material can return to its original shape and size. For example, silicone rubber seals may experience slight compression during normal assembly, but as long as they do not exceed their elastic limit, they can return to their original sealing shape well after the external force is released. Excessive deformation (beyond the elastic range) When silicone rubber products undergo excessive deformation beyond their elastic range and enter the plastic deformation stage, they may not be able to fully restore their original shape. Plastic deformation refers to the inability of a material to fully recover its original shape after being subjected to force, and this deformation is irreversible. Taking thicker gaskets made of silicone rubber as an example, if they are excessively compressed for a long time during use, exceeding their elastic deformation capacity, the molecular chain structure may be damaged or rearranged to a certain extent, resulting in their inability to restore their original thickness and shape. Temperature Temperature has a significant impact on the elastic recovery of silicone rubber. Within the general temperature range of use, silicone rubber products have good elasticity. For example, at room temperature, ordinary silicone rubber toys can return to their original state after being pressed and deformed. But when the temperature is too high, the molecular chain movement of silicone rubber accelerates, and its elastic modulus decreases, which may prevent it from recovering well after deformation. If the temperature is too low, silicone rubber will harden, the movement of molecular chains will be restricted, and its elasticity will also decrease, resulting in a decrease in recovery ability. For example, silicone rubber products in low temperature environments (such as around -50 ℃) may experience slow or even incomplete recovery to their original shape after being deformed by external forces. Chemical environment If silicone rubber products are exposed to chemical substances such as organic solvents or strong acid and alkali environments for a long time, their performance may be affected. Some solvents may cause changes in the interactions between the molecular chains of silicone rubber, resulting in a change in its elastic modulus. For example, silicone rubber products soaked in organic solvents such as gasoline for a long time may experience some degree of expansion in their molecular chains, making it difficult to restore their original shape after deformation.