How Do I Choose the Best Plastic Resin Glue?

Epoxy resin adhesive generally refers to an adhesive made with epoxy resin as the main component. Generally, epoxy resin adhesive should also include epoxy resin curing agent, otherwise the glue will not be cured.

Epoxy glue

Epoxy resin is divided into

The classification of epoxy resins has not yet been unified. Generally, they are classified according to strength, heat resistance grade and characteristics. There are 16 main types of epoxy resins, including general-purpose rubber,

1. Basic characteristics: two-component glue, need to be mixed with AB, strong versatility, can fill large gaps

2. Operating environment: room temperature curing, indoor and outdoor, can be mixed manually or use AB glue special equipment (such as AB glue gun

3. Applicable temperature is generally -50 to +150 degrees

4. Suitable for general environment, waterproof, oil resistant, strong acid and alkali resistant

5. Store in a cool place away from direct sunlight. Shelf life is 12 months.

1, epoxy resin is based on epoxy resin to re-process or modify its characteristics, so that its performance parameters, etc. meet specific requirements, usually epoxy resin also needs to have

1. Use a dry cloth or sandpaper to remove dust, oil, rust, etc. from the bonding surface, and then wipe with a cleaning agent such as acetone or trichloroethylene to clean the bonding surface.

2. Unscrew the front cover, take the weight ratio of A agent + B agent as described above, and stir well before use (A: B = 2: 1); in order to ensure the effect of use, you can also use a vacuum and use .

3. Note that it must be used up within the operable time, otherwise it will solidify and cause waste of materials, and the highest strength can be obtained after 24 hours.

4. After gluing, cure at 40 ° C to 50 ° C for 1 to 3 hours at 2 to 6 hours at room temperature; use after 24 hours of coating; better adhesion after ten days. For cold and wet days, it is necessary to adhere at room temperature of 15 ~ 25 degrees.

5. Adhesive straight face. When hanging upside down, you must use self-adhesive paper to help stick after glue. Or use 502 glue for positioning. Epoxy resin formula AB epoxy resin is a two-component high temperature resistant adhesive based on epoxy resin. It is mainly used for the bonding of high temperature resistant metals and ceramics. Its working temperature is -50 + 180 , and it can reach + 250 for a short time.

application

Epoxy adhesives are widely used. They can bond various metals and alloys, ceramics, glass, wood, cardboard, plastic, concrete, stone, bamboo and other non-metallic materials. They can also be used for bonding between metal and non-metallic materials. Pick up. It has no adhesion to untreated polyethylene, polypropylene, polytetrafluoroethylene, polystyrene, polyvinyl chloride and other plastics, and has poor adhesion to rubber, leather, fabric and other soft materials. In addition to bonding (common bonding and structural bonding), epoxy resin adhesive can also be used for casting, sealing, caulking, plugging, anti-corrosion, insulation, conductivity, fixing, reinforcement, repair, etc., widely used in aviation , Aerospace, vehicles, railways, machinery, weapons, chemicals, light industry, water conservancy, electronics, construction, medical, cultural and sports supplies, arts and crafts, daily life and other fields.

Selection of epoxy resin thinner

Diluents can be divided into active and inactive diluents. Common solvents are called inactive diluents. They do not react with epoxy resins and curing agents. They are purely physical infiltrations and volatilize with the curing reaction. Leaving pores will increase the shrinkage rate. In severe cases, it will affect the properties of the cured product, so it cannot be used for thicker coatings. Although there are also liquids with high boiling points, such as plasticizers such as dibutyl phthalate, trimethyl phosphate, etc., there is a tendency to migrate and exudate, especially when immersed in liquids and solvents. Large surface tension will seriously affect the leveling and surface effect of the material.

Application range of epoxy resin adhesive

Generally can be used at -60 100 ° C. New resin, special curing agent and filler can be used to prepare ultra-low temperature resistant glue (-196 ° C), high temperature resistant glue (350 ° C), electrical conductivity, magnetic permeability, thermal conductivity, point Welding, strain, light sensitive, flame retardant, underwater adhesives and other special adhesives. Low toxicity, no physiological side effects, harmless to the human body, can be formulated into environmentally friendly adhesives with low odor and non-toxicity. Poor toughness and brittleness, usually toughening modification.

Precautions for epoxy resin

1. It is best to wear knitted or rubber gloves with glue to avoid accidentally soiling your hands.

2. It is enough to wash it with soap when it comes into contact with the skin. Generally, it will not hurt your hands. If your eyes are accidentally touched, immediately rinse with plenty of water. In serious cases, please seek medical treatment in time.

3. During heavy use, please keep the work place ventilated and prevent fire.

4. When there is a large amount of leakage, open the window to ventilate, pay attention to fireworks, and then cover it with sand before removing it. ^[1]