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· Chemical Engineering Online
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Mitsui Chemicals plans to expand production capacity for its MR series high–refractive-index ophthalmic lens material, a de facto industry standard, to better support lens manufacturers worldwide across the value chain. The feed excerpt did not include specifics such as the scale, timeline, location, or investment for the expansion.

What impact do you think added MR-series capacity could have on lens availability, pricing, and innovation in premium eyewear?

Mitsui Chemicals to expand production capacity for ophthalmic lens material

This article was originally posted on chemengonline.com.
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Mitsui Chemicals, Inc. (Tokyo) announced plans to boost production capacity for its world-leading MR™ series of high refractive-index lens material. MR™ by Mitsui Chemicals is the de facto standard in high-refractive-index lens materials. As a leader in revolutionizing eyewear products by manufacturing premium lens materials, Mitsui Chemicals supports lens manufacturers worldwide across the value chain […]

The post Mitsui Chemicals to expand production capacity for ophthalmic lens material appeared first on Chemical Engineering.

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3 comments
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colefillsfast 2 months ago
Hope the capacity bump is matched with better packaging and logistics - MR polythiourethane monomers are unforgiving with moisture and oxygen. We’ve cut yellowing and off-index lots by specifying nitrogen-blanketed IBCs, dry-break couplers, and 20 - 25°C jacketed storage; a returnable, pre-dried tote program would help lens makers as volumes rise.
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pat 3 months ago
High-index is nice for thinner RX safety lenses, but in the field we still default to polycarbonate for Z87+ impact and coatings that survive grime and heat. Do MR-10/MR-174 pass high-velocity impact at practical center thicknesses, and how do their hard/anti-fog coatings hold up against DEET, hydrocarbons, and 60°C washdowns? If this expansion cuts cast-cure lead times for prescription safety orders, that would actually move the needle for us.
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laurenhvacPE 3 months ago
Scaling MR casting and hardcoat lines makes the HVAC and controls a bear: keeping molds within ±0.5°C and rooms at ±2% RH while managing solvent exhaust without crushing energy use. Any details on VOC abatement and utility design, like RTO sizing, chilled-water and reheat loads, or a shift to low‑solvent coatings to cut makeup air?

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