Product Description:

The working principle of 3545 reactive polyurethane hot melt adhesive is to heat and melt it into a fluid under conditions that inhibit chemical reactions, in order to facilitate coating; After the two types of bonded bodies are bonded and cooled, the adhesive layer condenses and plays a bonding role; Afterwards, with the help of the moisture present in the air and the moisture attached to the surface of the adhesive, it reacts and expands the chain, generating high polymer with high cohesion, significantly improving adhesion, heat resistance, low temperature resistance, and other properties. Its characteristics are wet curing, direct participation in subsequent processes after adhesive bonding, convenient operation, and firm adhesion.

Due to its extremely high reactivity, it exhibits excellent adhesion to various plastic materials, cures quickly, and has good impact resistance and weather resistance after curing. It is not affected by environmental temperature changes and does not creep or become brittle. It has high toughness, strong initial adhesion, and extremely strong adhesion. The bonding strength is 30% to 60% higher than other adhesives under the same conditions, significantly reducing the amount of adhesive used.

Hot melt adhesive products have become the first choice for bonding, sealing, laminating, connecting, insulating, electronic protection, and assembly of plastic substrates in the electronics and microelectronics industry. 3545 reactive polyurethane hot melt adhesive has the advantages of rapid curing, fine adhesive lines, and low cost.

Product Features:

① Good adhesion: can bond various substrates (such as PP, PC/ABS, PC, PC/GF, PMMA, metal, ink glass, etc.);

② Solvent free, pure solid, non corrosive, and halogen-free, it belongs to environmentally friendly products;

③ Good high temperature resistance, able to work for a long time at -25 ℃ to 95 ℃;

④ Excellent weather resistance, sealing, corrosion resistance, aging resistance, creep resistance, and temperature impact resistance;

⑤ Rapid initial curing, can reach initial curing after 20 minutes of adhesive application.

Product Information:

① Opening time (115 ℃): 1 minute;

② Solid content: 100%, transparent color, black solid;

③ Viscosity (120 ℃): 4000 CPS

④proportion（g/cm³）： 1.15

⑤ Glue application temperature (℃): 93-110;

⑥ Glue application width (mm): 0.5-3.0;

Curing performance:

☆ Glass transition temperature: -39 ℃;

☆shear strength：5.6～8.3 MPa；

☆ Tensile strength: 6.1-8.3 MPa;

☆ Softening point: 92 ℃~113 ℃;

☆ Shore hardness: 30D

☆ Elongation rate: 530% to 860%;

☆ Temperature resistance after curing (℃): -40~130

Use explanation:

① Before use, please drain a small amount of glue from the front end of the nozzle.

② Heat and melt the 3545 reactive polyurethane hot melt adhesive at a constant temperature of 115 ℃, and use a dispensing device to complete the bonding within 1 minute at the desired bonding site (the specific time may vary depending on the ambient temperature and humidity). Then, hold the adhesive in a fixed fixture for 20 minutes (clamps or pressure holding fixtures can be used) before moving to the next workstation. It takes 1-2 hours to cure again

③ Suggest heating for no more than 3 hours.

④ If the heating time is too long, it will cause the back of the hose to crust. At this time, the crust can be punctured to reduce the pressure of gluing.

Product Usage:

3545 reactive polyurethane hot melt adhesive is a single component, solvent-free hot melt structural adhesive. Specific applications include window bonding, shell structure bonding, decorative component bonding, phone back shell bonding, battery bonding, touch screen assembly, keyboard bonding, flat sealing, glass cover plates, headphones, PCB assembly and protection, etc.

The low cost of 3545 reactive polyurethane hot melt adhesive is reflected in its ability to apply adhesive lines as thin as 1mm on handheld devices such as mobile phones, tablets, iPads, and laptop screen structures. Even such a thin adhesive layer will not affect the bonding strength; This thin adhesive layer can also ensure that customers have the technical strength they need, thereby achieving a lighter, narrower, thinner, and more aesthetically pleasing convenient handheld design.

Storage conditions:

Store at 5 ℃~25 ℃, sealed in a dry and cool environment, avoid direct sunlight, and avoid contact with moisture, water, and alcohol solvents.