Description:
Wellmid 2028 is a multi-purpose, two-component, room temperature curing, low-viscosity epoxy resin adhesive with strong wettability, high curing strength, good toughness, and good water and chemical resistance; Especially used for infiltration and bonding of carbon fiber and glass fiber, and also used for bonding metal, concrete, rubbe,r and most hard plastics;
It is mainly used in the structural bonding of carbon fiber andg lass fiber products of walking sticks, fishing rods, and sportse quipment with metal and rubber, as well as insulating sealing and bonding of electronic components.
Key properties:
● Solvent-free, green and environment-friendly products
● Tough adhesive with good impact peel strength
● Good aging resistance, excellent water resistance and chemical corrosion resistance
● Long operating time and is suitable for large-area composite material construction
● Use for the infiltrating bonding of carbon fiber and glass fiber, also for metal, r ubber
● Also used for insulating sealing and waterproof bonding of light electronic components
● Mix ratio by volume:100:40 / Mix ratio by weight:100:30
Property | 2028RESIN(A) | 2028HARDENER(B) | 2028AB(Mixed) |
Colour (visual) | Blue | Transparent Pale-yellow | Blue |
Specific gravity | 1.20~1.30 | 0.90~1.00 | 1.15~1.25 |
Viscosity at 23-25℃ | 55 Pa.s | 0.4 Pa.s | 6.0~8.0 Pa.s |
Pot Life at 23-25℃ | - | - | 120 minutes |
Pretreatment:
The strength and durability of a bonded joint are dependant on proper treatment of the surfaces to be bonded. At the very least, joint surfaces should be cleaned with a good degreasing agent such as acetone, alcohol or other proprietary degreasing agents in order to remove all traces of oil, grease and dirt. The strongest and most durable joints are obtained by either mechanically abrading or chemically etching (“pickling”) the degreased surfaces. Abrading should be followed by a second degreasing treatment.
Application of adhesive:
Wellmid 2028 AB must be thoroughly mixed in the corresponding proportion to achieve the best bonding effect.
Side-by-side cartridges and the static mixer can achieve better mixing results while increasing efficiency and reducing waste and pollution. The resin and hardener can be applied directly to the pretreated dry bonded surface through the mixer. A layer of 0.05-0.10mm thick adhesive layer can completely wet the adhesive surface, and give the adhesive with maximum shear strength. Too thick adhesive layer and too much glue around, and can not bring greater bonding strength to the adhesion.
Equipment maintenance:
All tools should be cleaned with hot water and soap before adhesives residues have had time to cure. The removal of cured residues is a difficult and time-consuming operation. If solvents such as acetone are used for cleaning, operatives should take the appropriate precautions and, in addition, avoid skin and eye contact. Used cartridges and mixers cannot be used again.
Curing Time and Temperature:
Curing temperature | 10℃ | 15℃ | 25℃ | 40℃ | 60℃ | 80℃ | 100℃ |
Cure time to reach 50% shear strength | 22H | 15H | 10H | 3H | 45min | 30min | 9min |
Cure time to reach 100% shear strength | 96H | 72H | 48H | 16H | 6H | 3H | 30min |
More Wellmid2028A and B is mixing at room temperature, the faster it will cure and the shorter the working time will be. and the glue will foam due to the excessive heat generated during the curing reaction; It is recommended to use a large open container for glue mixing, and use a fan to cool down the mixed glue, which can extend the operating time after mixing.
DIY workers mixing the glues on the plastic lid that comes with the tin can reduce pollution, and the glue remaining on the plastic lid can be easily removed after the glue has cured;
Storage and Packing:
Wellmid 2028 A and B must be stored at room temperature provided the components are stored in sealed containers. Avoid sunlight, the longest effective time of the product can be more than 36 months; The expiry date is indicated on the label.
Package: 1.3lb(590.2Grems) / 5.2kg Tin can Sets.