Composite Gas Cylinder Winding Forming Special Resin Matrix

The composite cylinder has the advantages of being lightweight, having high working pressure, having long fatigue life, and good corrosion resistance, and has a good application prospect in the fields of high-pressure hydrogen storage, oxygen storage, and compressed natural gas. Composite gas cylinders are usually prepared by winding process. After impregnating the special resin matrix such as high-performance carbon fiber or glass fiber, the winding machine is laid on the outer surface of the mallet according to a certain winding Angle and laying sequence, and the gas cylinder with a specific shape is obtained after curing and shaping. The viscosity, application period, wettability, mechanical properties, and heat resistance of the resin matrix have decisive effects on the winding process and cylinder performance.

Shanghai Institute has been committed to the research and development of carbon fiber composite gas cylinders such as compressed natural gas cylinders, high-pressure hydrogen storage cylinders, etc., and has developed a series of special resin matrices suitable for winding molding, which can meet the preparation of different types of composite gas cylinders.

It is suitable for winding high-pressure gas cylinders with metal inner liners, such as compressed natural gas cylinders, high-pressure hydrogen storage cylinders, etc. The main features of the product are as follows:

◆ Low viscosity and good fiber infiltration: At 25℃, the viscosity of the resin is between 200 mPa.s and 300 which has good infiltration for carbon fiber and glass fiber.

◆ Long application period: At 25℃, the application period (the time required for the viscosity to reach twice the initial viscosity) exceeds 8h, has good process stability, and does not need to clean the resin tank for 24h continuous work.

◆ High toughness: The unnotched impact strength of theresin cured simply supported beam is higher than 30 kJ/m'and the fracture toughness is higher than 1.5 MPa.m'.

It is suitable for the winding and forming of liquefied petroleum gas (LPG) cylinders with plastic inner tanks. The main features of the products are as follows:

◆ High toughness: The elongation at the break of the resin matrix is more than 10%, which is conducive to improving the impact resistance and fatigue resistance of the gas cylinder.

◆ Fast curing speed: The curing time does not exceed 90 minutes at 110℃, which is suitable for the automatic production line of gas cylinders.

◆ Light color: The resin matrix solidified material is nearly colorless and transparent, so the glass fiber winding layer is good in light transmission, and it is easy to observe the liquid.

◆ High toughness: The unnotched impact strength of the the resin-cured simply supported beam is higher than 30 kJ/m', and the fracture toughness is higher than 1.5 MPa.m', level of liquefied petroleum gas in the gas cylinder.

High-pressure hydrogen storage bottle for plastic inner tank winding molding, the main features of the product are as follows:

◆ Very long application period: The latent modified amine the curing system is used, and the application period (the time required for the viscosity to reach twice the initial viscosity) exceeds 48h at 40℃, with good process stability, and the resin tank does not need to be cleaned during use.

◆ Low viscosity and good fiber infiltration: At 30℃, the viscosity of the resin is between 200mPa.s and 300mPa.s, which has good infiltration for carbon fiber and glass fiber.

◆ Low curing temperature: It can be cured at the temperature range of 80°C~110°C, especially for the technical requirements that the curing temperature of plastic inner cylinder generally cannot exceed 110°C.

◆ High toughness: The elongation at the break of the resin-cured material is higher than 6%, which is conducive to improving the impact resistance and fatigue resistance of the gas cylinder.

AM-1 winding molding resin has been used in 35MPa L-type hydrogen storage cylinders for industrial applications.

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