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Method for making silicon rubber hose products
The article has shared the chemical properties of silicone rubber hose products, below small make up to share the production method of silicon rubber hose products under.
Silica gel tube on the permeability of N2O proposed by indoor simulation of this test, the theory feasibility test application of silicone tube collection of soil N2O, and obtain the corresponding parameters for gas guidance of field sampling frequency. The test device consists of a wide mouth bottle with a rubber plug (volume 2L, simulated pore) and silicon rubber pipe (Fig. 1). Silicone tube wall 3mm, inner diameter 12mm, length 115m, circled into the jar, the two ends through sealed with silicone stopper stopper, near one end connected to the Teflon tubules, tubular rubber plug and the other end passes through a three-way valve connected. The rubber plug is inserted with a Teflon other tubules, tubules a head is also connected three-way valve. All are connected with glass silica gel sealing to ensure air tightness device. By two three way valve to control the rubber plug, the realization of the silicone tube of space and outer space communicated with the bottle, and a jar of space and outer space of the bottle. The gas in the silicone tube and a jar of exchange can only be realized by silica gel tube wall diffusion. Test the specific operation as follows: first open the two three, the atmosphere and the jar and silicone tube is communicated with the inner space.
After 5min, closed connected with silicone tube three. Take 50mL air from the jar through the medical syringe with three-way valve, and then injected back into the calibration of 50mLN2O gas concentration is 7115 L/L, in order to maintain the balance of internal and external pressure. This time 0, respectively, in 0, 315, 8, 15, 30, 60, 100, 150, 203min, with a syringe through the three way to draw the jar and gas silicone tube of about 3mL, and immediately used gas chromatography analysis of N2O concentration. This test is repeated 3 times. The relative change of percentage difference calculating concentration of N2O silicon tube in the indoor and outdoor air diffusion equilibrium process reflects the silicone tube inside and outside the N2O gas.
Formula: relative concentration difference (N2O = concentration of N2O silicon tube inner jar jar) / N2O concentration x 100.
This article from the Shenzhen City Qiyu Silicone Rubber Co., Ltd.: http://www.szhcty.com/news_v.asp? Id=259
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