Wajeeh ur Rehman

4 Questions 5 Answers 0 Followers

Questions related from Wajeeh ur Rehman

What are some best known methods to modify HDI (Hexamethylene diisocyanate) to make it more reactive for uv curing of ink?

Hi, I have made a binder polymer resin for uv curing of ink. The viscosity of binder polymer is between 700 to 1300 cps. Basically I disperse the inorganic pigments in the binder polymer along...

23 August 2024 9,772 6 View

What are some general rules to improve the hydrophilicity of polymer surfaces?

I am working on RGP contact lenses and silicon hydrogel contact lenses, Both materials are extremely hydrophobic. I would like to reduce the hydrophobicity (contact angle 90 to 20-30). I am...

23 November 2021 4,310 5 View

Soft contact lens molds needed

Hi, I am working on silicone hydrogel soft lens technology. Soft lenses are UV cured by filling the material in female mold and closing with male molds. Currently I do not have suitable male and...

01 January 1970 4,288 0 View

What is the optimum combination of photo initiator 819 and 184 when used together for UV curing of ink and what is the suitable UV LED wavelength

I am working on uv curing of pad printed ink used in color contact lens. I am looking to find an optimum combination of photo initiator for Irgacure 819 and HPK 184 as the combination works better...

01 January 1970 9,259 0 View