How do you get to industrial polycarbonate

Gluing polycarbonate

As a polar and solvent-soluble plastic, PC can in principle be glued well, especially with precisely fitting, smooth butt and miter bonds, for example by means ofSolvents like dichloromethane and dichloroethane. Solvents and plasticizers can weaken the material, however, as PC is sensitive to stress cracks here. An existing scratch-resistant coating can also impair the bond. Therefore, a bond at the edge should always be carefully tested beforehand in order to avoid damage later. Transparent, colorless solvent-based adhesives are a good choice, especially for maintaining their optical properties. The advantage here is that the seams of PC-PC connections remain practically invisible. If butt and miter bonds are made with relatively small adhesive surfaces due to the construction, the use of a primer is recommended, which increases the strength.

Professional tip: The addition of chips of the PC material (approx. 8% share) to the solvent results in an almost perfect adhesive varnish with reduced evaporation rate and increased viscosity, which makes it easier to apply and handle the adhesive.

Ready-to-use solvent-based adhesives such as 3M Scotch-Weld 4475 are recommended for such applications. It is an oil, grease and plasticizer-resistant multi-purpose adhesive based on copolymers, with which polycarbonate can be glued to one another and to other transparent plastics such as acrylic glass (PMMA), but also to polyacetate, hard and soft PVC .

Security notice: When bonding with solvents that contain carcinogens or may be toxic, ensure that there is good ventilation.

For joint-filling or large-area bonding of PC against each other or against other materials (e.g. transparent plastics or lacquered metals), for example2 components-Adhesives based onmodified polyurethane.Here it is advisable to roughen the adhesive surfaces beforehand, to coat them with methanol and then to flash off and let them dry.

An example here is Scotch-Weld DP 610, a fast-curing, crystal-clear 2-component construction adhesive based on PUR for polycarbonate in connection with numerous other plastics such as ABS, PS, PET as well as painted and primed metal surfaces.

Cyanoacrylate supergluework to bond polycarbonate against each other or against other materials - but preferably for smaller adhesive surfaces. To improve adhesion, the surfaces should be roughened, cleaned with methanol and degreased. Examples include the Scotch-Weld PR100 (medium viscosity) or PR 1500 (high viscosity) for high-strength bonding of PC with ABS, PA, PVC and elastomers such as rubber, EPDM and SBR.

Stable connections of thicker PC sheets with one another or with hard plastics, metals or mineral materials can be achieved by means ofSilicone rubber realize.

Also Hot melt adhesives- so-called hot melts, such as B. the Scotch-Weld 3764 - are suitable for polycarbonate with plastics such. B. PMMA, polystyrene, polyester, polyolefins such as PE, PP to glue. Hot melts provide excellent impact resistance and the low viscosity allows thin glue lines.

AlsoAdhesive tapes are ideal for joining polycarbonate sheets to steel, aluminum, stainless steel, galvanized / painted steel, glass / epoxy, ceramic, ABS or hard PVC. The 3M VHB tapes (4950, 4930, 4920) also stick reliably to difficult-to-bond plastics, paints and powder coatings.