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Five major disadvantages of liquid photosensitive polymer selective curing technology

by:Tuowei     2019-09-20
2014-07- 10 08:25

five major disadvantages of liquid photosensitive polymer selective curing technology

selective curing of liquid photosensitive polymer ( SLA prototype model: strreolithographyparatus flat-panel printing equipment)

In 1902, a patent in the United States proposed the principle of making plastic parts with photosensitive polymers, another patent in the United States in 1986 proposed a rapid prototyping scheme for 3D solids by laser irradiation of liquid photosensitive resin layering. The US 3 DSystems company produced the first laser rapid prototyping machine SLA on 1988-250.

The configuration material used by this laser rapid forming machine is a liquid photosensitive polymer, which will undergo polymerization and curing reaction under ultraviolet light irradiation, from liquid to solid state, the advantages are that the resin parts like plastic can be directly obtained and the surface roughness is small.

Its disadvantages are:

(1) The chemical and physical changes in the forming process make the dimensional accuracy not easy to guarantee, and creep will occur;

(2) The whole section must be scanned and cured, and the forming time is long. After forming, it should be further cured;

(3) Since the part not irradiated by the laser beam is still liquid, the suspension part should be designed in advance, and then removed after curing;

(4) After curing, the photo-sensitive resin is brittle, easy to break, and has poor processing performance. The working temperature cannot exceed 100 ℃, and it will be expanded by moisture absorption. The corrosion resistance is not strong and the price is expensive (140-2404/kg);

(5) The life of the laser tube producing UV laser is about 2000 hours.


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