Laser Sealing Introduction
KBiosciences has developed an automated laser plate sealer that
utilises the process of transmission diode laser welding as detailed
below. It is able to seal virtually all plate densities from single
tubes to 3456 plates.
The ability to seal microtitre plates is perhaps not as straight-forward as it can some time seem. Thermal or adhesive based plates seals are ideal for a number of situations and disciplines. However they have some drawbacks where there is an unmet need. These disadvantages are;
Principle of tramsmision diode laser welding
Direct diode transmission laser welding relies on the fact that
a joint, whose strength often exceeds that of the parent materials,
can be produced between two plastic components. One component part transmits
the laser energy and the other part absorbs it. As a result, heat is
generated at the surface of the joint interface to a depth of 20 µm,
the plastic is melted and fusion takes place. Unlike conventional laser
welding, the energy is delivered to a small 80µm diameter
spot creating a uniquely strong weld.
Why use a Laser Sealer?
The KBiosciences laser sealer is unique in that the directed laser beam
is approximatelyimately 75um in diameter. When this is directed onto
a plate surface it is directed to the plastic between the wells and
not over the wells. This results in very little heat being passed to
the plate and ultimately the sample. A number of advantages are enabled
by this fact
Features
- No heat is passed to the sample
- Higher plate densities are sealed perfectly
- The seal can be covalent or removable
- The seals that are applied can be optically clear, increasing signal
Fusion laser sealer
The Fusion laser sealer from KBiosciences is a completely automated instrument which can also be controlled remotely via an RS232 command set.
The instrument utilises a 30w 808nm laser that is mounted onto an XY robot allowing the user to program the welding pattern required. It is a bench mounted instrument that requires 5bar compressed air and a single 230v power supply. For more info and sample sealed plates please conatct us direct.