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Fourteen factors affecting the quality of silicone products

Release time:

2019-05-18 12:30

Source:

Fourteen factors affecting the quality of silicone products
 
ImpactSilicone ProductsWhat are the quality problems and factors that affect the quality of silicone products?
 
One: Viscosity The scientific and technological terms of viscosity explain: the volume characteristics of liquid, pseudo-liquid or pseudo-solid substances to resist flow, that is, the internal friction or internal resistance of flow between molecules when flowing under the action of external force. Viscosity and hardness are usually proportional.
 
Two: hardness The ability of a material to locally resist hard objects pressed into its surface is called hardness. Silicone rubber has a Shore hardness range of 10 to 80, which gives designers full freedom to choose the desired hardness to achieve a specific function. Various intermediate hardness values can be achieved by mixing polymer substrates, fillers and auxiliaries in different proportions. Similarly, the time and temperature of heat curing can also change the hardness without destroying other physical characteristics.
 
Three: Tensile Strength Tensile strength refers to the force required per range unit to cause a sample of rubber material to tear. The tensile strength range of hot-sulfurized solid silicone rubber is between 4.0-12.5MPa. Fluorosilicone rubber tensile strength range between 8.7-12.1MPa. The tensile strength of the liquid silicone rubber ranges between 3.6-11.0MPa.
 
Four: Tear strength The resistance to hinder the expansion of the cut or score when force is applied to the cut sample. Even if it is placed under high torsional stress after cutting, the heat-vulcanized solid silicone rubber can not be torn. The tear strength of hot-vulcanized solid silicone rubber ranges between 9-55 kN/m. The range of fluorosilicone rubber tear strength is between 17.5-46.4 kN/m. The tear strength of liquid silicone rubber ranges between 11.5-52 kN/m.
 
Five: Elongation usually refers to the "ultimate rupture elongation" or the percentage increase relative to the original length when the sample breaks. Hot-sulfurized solid silicone rubbers typically have an elongation in the range of 90 to 1120 percent. Fluorosilicone rubber generally has an elongation of between 159 and 699 percent. Liquid silicone rubber generally has an elongation of between 220 and 900 percent. Different processing methods and the choice of hardener can greatly change the elongation. The elongation of silicone rubber has a great relationship with temperature.
 
Six: operation time. The operating time is calculated from the moment the colloid is added to the vulcanizing agent. In fact, there is no complete limit between this operation time and the latter vulcanization time. The colloid has already carried out vulcanization reaction from the moment when the vulcanizing agent is added. This operation time means that the vulcanization reaction of the product for 30 minutes can not affect the quality of the finished product. Therefore, the more time is saved during the operation of the product, the more beneficial it is to the finished product.
 
Seven: vulcanization time some places will be said to be curing time. That is to say, after such a long time, the vulcanization reaction of silica gel is basically completed. This is basically over, which means that the product is already available, but in fact there is still a small part of the curing reaction that has not yet ended. Therefore, products made of silicone rubber, such as silicone molds, are usually put on a period of time before being put into use. Due to the silicone gift factory Weishun silicone production of more and more types of silicone products, the various performance advantages of silicone is widely used in all walks of life! Among them, the elasticity of silicone products is one of the more prominent ones. Today, Xiao Bian will take you to understand what factors affect the elasticity of silicone products.
 
Eight: the formula and quality of raw materials will directly affect the toughness and resilience of the product.
 
Nine: excessive force, especially in some machinery industry, which leads to long-term recycling and pull up the frequency and strength is too large, resulting in performance to reach the limit, over time life will gradually decline.
 
Ten: improper use of different strength lead to performance degradation, in some common and the same model of the occasion used together and the two different forces or different environments (such as ozone, oil heavy place) will lead to fatigue use of silicone and reduce life!
 
Eleven: Silicone products manufacturer production problems, in the manufacturer's production process due to the mixing of vulcanizing agent with the expected hardness of the material, to the molding molding vulcanization temperature, pressure and time may affect the elasticity of a silicone products and other performance problems. As a silicone factory in Dongguan, Mingzhen silicone products not only provide customers with high-quality silicone products, but also provide you with customized solutions and solve customized problems! Welcome people from all walks of life to visit jianhao silicone to visit, guide and discuss cooperation!
 
Twelve: Details are often the key to affecting silicone products. In the beginning of 2018, the silicone industry belt also welcomed the news of DMC's continuous improvement. Therefore, it also affected various reasons such as insufficient formula supply of raw materials in the downstream industry. For the upstream of the silicone industry chain, it was learned that silicone DMC gradually began to increase its price in March this year, from 12000/ton in July 2017 to 15500/ton in November 2017, the five-month period increased by nearly 20% year-on-year. In addition, the DMC silicone industry was affected by China's central environmental protection inspection in the middle of last year, and the prices of chemical raw materials such as methanol and methyl chloride were raised. The focus of various costs was all suppressed on silicone, thus resulting in a corresponding increase in the prices of various industries and molds.
 
Since the 18th century, the silicone industry has been developing rapidly, with production and sales increasing year by year. Therefore, it can be seen that the demand for silicone rubber products in the market is still considerable. However, in terms of price, everything depends on various reasons. In March 2017, it was reported that DMC price will continue to rise by 20000 yuan/ton according to relevant information. Therefore, the increase in various cost prices will raise the price center of the silicone industry, naturally, it will also affect the price increase of silicone products manufacturers, so for new and old customers, we hope to understand the correlation problem, and the quotation for various products and molds will not be far from the whole silicone industry.
 
According to Mingzhen silicone suspicion, in the next few years, the demand for the market in the silicone industry will continue to grow, because of the development of the times, in the automotive, electronics, machinery, leather, decoration, construction, military and other industries are in Continuous innovation and continuous growth, such as the smart phones we use, mobile phone shells, sealing materials over time, silicone products such as electronic miscellaneous parts will be more and more closely linked to our life and work. Therefore, while the upstream of silicone is impressed, the first thing the industry needs is to be relieved by suppliers and understood by customers!
 
Thirteen; the effect of molding vulcanization time on silicone products The vulcanization time of silicone products, some places will be said to be the curing time. Refers to the silica gel from raw materials to silica gel products over a period of time, that is to say, after such a long time, the vulcanization reaction of silica gel is basically over. This is basically over, which means that the product is already available, but in fact there is still a small part of the curing reaction that has not yet ended.
 
Therefore, products made of silicone rubber, such as silicone molds, are usually put on a period of time before being put into use. The vulcanization time of silicone products is directly related to the quality of the product. When the vulcanization time is too short or too long, it will lead to bad products.
 
If the vulcanization time is over, the molded silicone products may be immature. If the vulcanization time is too long, the product will bubble or burst. The whole process of molding vulcanization is very difficult to control, especially some of the more complex structure of silicone products mold, vulcanization time and vulcanization temperature are very sensitive.
 
Fourteen: The influence of the process of silicone products on their quality When making molds for silicone products, the first thing to consider is the choice of raw materials for the molds. According to the quality of the product, quantity, structure, etc. to determine the selection of mold. Mold material selection is a very important part of the whole mold making process. In addition, there are other processes and choices that also affect the quality of their finished products. Silicone material chemical properties are very stable, the products made, than other materials have a longer life, and thanks to the softness of silicone materials, cake mold silicone products feel comfortable, very flexible, no deformation.
 
When the blank is plastically deformed in the mold cavity, it flows and slides along the surface of the cavity, causing severe friction between the surface of the cavity and the blank, which easily leads to the failure of the mold due to wear. So the silicone material should have wear resistance. Food grade silica gel is non-toxic, tasteless, insoluble in water and any solvent, and is a highly active green product.
 
Food grade silica gel has inherent thermal stability and is suitable for different occasions. The product has good softness and meets different needs. During production, the working conditions of the mold are mostly very bad, and some often bear large impact loads, resulting in brittle fracture. In order to prevent sudden brittle fracture of mold parts at work, the mold should have high strength and toughness.

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