{"id":395,"date":"2023-07-28T01:34:35","date_gmt":"2023-07-28T01:34:35","guid":{"rendered":"https:\/\/srtub.com\/?p=395"},"modified":"2023-07-28T01:34:35","modified_gmt":"2023-07-28T01:34:35","slug":"five-ways-to-identify-silica-gel-raw-materials","status":"publish","type":"post","link":"https:\/\/srtub.com\/zh\/five-ways-to-identify-silica-gel-raw-materials\/","title":{"rendered":"Five ways to identify silica gel raw materials?"},"content":{"rendered":"

In the production process of silicone rubber products, sometimes it is necessary to identify the raw materials of silicone rubber, so what are the commonly used methods for identifying silicone rubber? Below, Srtub Silicone Products Factory will share the 5 most commonly used methods.<\/p>\n

1. Measure the weight, take out the sample, use an electronic scale or an analytical balance, and the accuracy is 0.01 grams. It is the easiest to identify the fluorine rubber because the weight of the fluorine rubber is the largest, above 1.8, and the proportion of CR ECO is also above 1.3. The specific gravity is obviously biased. The big ones can be considered these glues.<\/p>\n

2. In the burning method, a small amount of product must first be taken out and burned. Fluorine rubber generally has a normal burning effect, while CR and CSM are extinguished without fire support, and NR and EPDM burn with relatively large flames. In addition, you can also carefully observe the burning state, color, and smell. For example, if NBR\/PVC is used together with glue, the fire will splash randomly when there is a fire source, and it will self-extinguish after leaving the fire, and the smoke will be thick and have a sour smell.<\/p>\n

3. Hot air aging, take out the sample, put it in the aging box for aging for one day, and observe the phenomenon after aging. Graded aging ramps up gradually. CR, NR, and SBR will be brittle at 150 degrees, and NBR EPDM is still elastic. Ordinary NBR will be brittle when it is raised to 180 degrees; HNBR will be brittle at 230 degrees, and fluorine rubber and silicone still have good elasticity.<\/p>\n

\"Silicone

Silicone Tubing for Medical Industry<\/p><\/div>\n

4. Resistance to medium weight gain. Samples can be taken from the finished product, soaked in one or several selected mediums, weighed after a certain temperature and time, and the type of material can be inferred according to the rate of change in weight and hardness. Soaked in 100-degree engine oil for 24 hours, NBR, fluorine rubber, ECO, and CR have little change in quality and hardness, while NR, EPDM, and SBR have more than doubled their weight and greatly changed their hardness, and their volume expansion is obvious.<\/p>\n

5. Low temperature method, take out the sample and put it in a suitable low temperature environment. Soak the sample in a low temperature environment for 2-5 minutes, and feel the degree of softness and hardness at the selected temperature. For example, at -40 degrees, compared with silicone rubber, which is also good in high temperature and oil resistance, and fluorine rubber, the silicone rubber is softer.<\/p>\n

\"Medical

Medical Grade Silicone Tubing<\/p><\/div>\n

Summarize:<\/p>\n

Silicone rubber raw materials can be distinguished through 5 methods, but the actual operation situation is still judged by the situation at that time. For example, the existing configuration and conditions in the silicone product factory, choose the appropriate method, so that it can be quickly distinguished, which can save time and Cost, so that the production efficiency of silicone rubber products can be guaranteed.<\/p>\n

WhatsApp\/Wechat: +86 13075286997<\/p>\n

Email: sales@srtub.com<\/p>\n\n

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