Frame For Iphone x 13 pro max

              Talking about the dispensing process of PUR hot-melt structural adhesive for narrow frame assembly

With the progress of science and technology, the intelligent industry has become more and more developed. Mobile phones and tablet computers have entered the era of full touch screens. Smart wearable devices have become more and more popular. Electronic products are light, thin and intelligent. The hot melt adhesives used in glue processing also put forward higher and higher requirements.

The frame bonding of traditional mobile phones and tablet computers is mostly double-sided adhesive bonding, but the narrow trend of the frame design makes double-sided adhesive products no longer meet the requirements of various testing indicators. PUR hot-melt structural adhesive dispensing processing Craft has become a new trend.

The moisture-curing PUR hot-melt adhesive used in the dispensing process of PUR hot-melt structural adhesive is a kind of electronic structural adhesive, which is mainly used in the bonding of mobile phone frames and TP touch screens, the bonding of smart wearable device shells, and the bonding of tablet computer frames and touch screens. , window bonding, shell structure bonding, battery bonding, touch screen assembly, keyboard bonding, plane sealing, PCB assembly and protection, etc.

PUR hot-melt structural adhesive dispensing processing, in the application of mobile phone screen structural bonding, can dispense a glue line with a width of 1mm without affecting its bonding strength at all. Only when these gaps are sealed, the appearance of the mobile phone will be wetted by rain, which will greatly reduce the possibility of infiltration into the interior of the mobile phone and reduce the probability of repairing the mobile phone, thereby achieving a lighter, thinner, and more beautiful portable handheld design.

PUR hot-melt structural adhesive dispensing process: Dispensing - hot pressing - holding pressure - complete moisture curing.

Heating the PUR hot-melt adhesive into a fluid, so as to facilitate the dispensing of PUR hot-melt structural adhesive; after the two products to be bonded are cooled, the glue layer will coagulate to play a bonding role.

Advantages and disadvantages of moisture curing PUR hot melt adhesive:

Advantages: good environmental protection; friendly to dispensing processing and operation staff, low odor; good weather resistance, irreversible characteristics after curing, so it will not be subject to creep and brittleness caused by ambient temperature changes; high toughness, strong initial adhesion , has extremely strong permeability and affinity; the adhesive performance is 40-60% higher than other adhesives under the same conditions, reducing the amount of adhesive used; good impact resistance, good wettability, and various substrates materials have good adhesive properties.

Disadvantages: special dispensing equipment is required; moisture curing, the curing speed is relatively slow; fixtures are required.