Pressure Vessels, Such as Hydrogen Cylinder
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The 3221A/B Filament Winding System consists of an epoxy resin and an acid anhydride hardener. This system is intended to provide good thermal and chemical Resistance, low viscosity, high fiber bond with ease of processability and long pot-life.
Long operating time
Long pot-life
Good infiltration for glass fibers & carbon fibers
This 3221A/B Filament Winding System is suitable for the manufacture of structural composites for the Oil, Gas and Chemical industry.
Liquid Properties
Property* | 3221A Epoxy | 3221B Hardener |
Viscosity (25oC, mPa.s) | 1200- 1500 | 100-200 |
Density (25oC, g/cm3) | 1.1- 1.2 | 1.1- 1.2 |
Epoxide Equivalent Weight (g/mol) | 175- 190 |
|
Acid Anhydride Equivalent Weight (g/mol) |
| 180-220 |
Shelf Life (25oC, Months) | 24 | 24 |
* Typical value, not to be construed as specifications.
Recommended Process
The curing system can be adapted to each applications. Accordingly, times, temperatures, and heating rates should be adjusted such that the entire composite product fully cured to attain full properties.
3221A/B | |
Ratio by Weight | 100:100 |
Mixing Viscosity (25oC, mPa.s) | 350-600 |
Mixing Density (25oC, g/cm3) | 1.1- 1.2 |
Please mix the resin/hardener in correct ratio specified above, any change would not affect the reaction speed but cause curing problem. Adding hardener into the resin and stir it thoroughly.
Casting Properties
Property* | 3221A/B | Test Method |
Glass Transition Temperature, Tg (℃) | 120- 130 | DSC, Mid-point |
Tensile Strength (MPa) | 75-85 | ASTM D638 |
Tensile Modulus (MPa) | 2700-3200 | ASTM D638 |
Elongation (%) | 6.5-9 | ASTM D638 |
Bending Strength (MPa) | 120- 130 | ASTM D790 |
Bending Modulus (MPa) | 2700-3200 | ASTM D790 |
Curing Condition | 2hour@ 90o C and 3hour@ 110 ℃ |
* The listed data is typical physical property, not to be construed as product specification
Packaging & Storage
The product is packed in a clean and dry container, keeping sealed.
Shelf life: 24 months below 25 oC, stored in cool, dry and well ventilated place, decreasing with improper storage or transportation conditions.
3221A epoxy should be stored in room temperature and sealed tightly. Please heat it to 60-70oC and stir before using when there is crystallization or sedimentation.
3221B hardener is extremely sensitive to water and temperature and high humidity storage can greatly affect the reactivity and final performance of system materials. So it should be stored in room temperature and sealed tightly.
Customer Notice
This resin contains ingredients which could be harmful if mishandled. Contact with skin and eyes should be avoided and necessary protective equipment and clothing should be worn. UTEK maintains Material Safety Data Sheets (MSDS) on all of its products. MSDS contain health and safety information for your development of appropriate product handling procedures to protect your employees and customers. UTEK personnel are available to assist customers in dealing with ecological and product safety considerations. For more information on the regulatory status of this product, please refer to the MSDS for this product.
This specification will be adjusted with the development of technology. The company reserves the right to modify certain technical data.
 Application Picture |  Application Picture |
Union Composites
Union focuses on the manufacturing of composite materials and is the designated distributor of Jushi Group, which can provide customers with composite products of stable quality. Union is committed to meeting diverse customer needs and can customize products.
