Question 1

Why is low oil absorption critical for UV coating matting agents?

Accepted Answer

In 100% solids UV systems, matting agents absorb a portion of the reactive diluent and oligomer mixture that constitutes the entire liquid phase. High oil absorption silica removes too much reactive monomer from the coating matrix, causing viscosity spikes that degrade levelling, reduce through-cure depth, and ultimately compromise film properties. HMMAT UV Series is engineered with low oil absorption specifically to minimise this effect, maintaining the low-viscosity profile needed for flatline UV application at high line speeds.

Question 2

Does wax treatment on silica inhibit UV cure?

Accepted Answer

Organic wax on silica surfaces can act as an oxygen barrier that extends the inhibition period at the film surface during radical UV cure, and can also compete with photoinitiator absorption of UV radiation. HMMAT UV Series uses a non-wax treatment specifically designed for UV compatibility, ensuring photoinitiators receive the full UV dose required for complete surface cure and leaving the matting layer fully integrated into the crosslinked film network.

Question 3

What line speeds and UV lamp types are compatible with HMMAT UV-formulated coatings?

Accepted Answer

Coatings formulated with HMMAT UV Series are compatible with both mercury arc and UV-LED curing systems. At typical loadings of 3–8 wt% and UV doses of 300–600 mJ/cm², full surface and through-cure is achieved at line speeds of 15–50 m/min on flatline wood and plastic substrates. Higher line speeds may require increased lamp intensity or dual-lamp configurations — we recommend formulation trials with your specific line data.

Question 4

Can HMMAT UV Series be used in UV inks as well as UV coatings?

Accepted Answer

Yes. HMMAT UV Series low oil absorption and non-wax treatment make it suitable for UV offset, flexographic, and screen inks requiring a matte or satin finish. Particle size selection is important: sub-grades with d50 3–5 µm are recommended for thin-film UV ink applications (3–10 µm film) to avoid printhead issues in digital UV ink-jet systems. For thicker UV varnishes (15–30 µm), d50 5–9 µm sub-grades are appropriate.

Question 5

What FCL supply terms and technical support does SEMITECH provide for UV coating OEMs?

Accepted Answer

SEMITECH supplies HMMAT UV Series in 20 MT FCL with locked specification (d50, oil absorption, BET surface area, moisture). Private-label packaging in 25 kg bags is standard. Technical support includes formulation starting points, compatibility screening data with common UV oligomer systems, and on-request sample qualification sets for your product registration. Lead time is 25–35 days first run, 15–20 days repeat.

گرید	d50 / عملیات	محدوده DFT	تناسب کاربردی
HMMAT UV (ریز)	3–5 µm / بدون واکس UV	5–15 µm	جوهر UV، ورنی UV فیلم نازک
HMMAT UV (استاندارد)	5–8 µm / بدون واکس UV	10–25 µm	خط صاف چوب UV، رویه UV پلاستیک
HMMAT UV (درشت)	8–12 µm / بدون واکس UV	20–40 µm	ورنی صنعتی UV ضخیم، مات عمیق
HMMAT 200	4–9.5 µm / واکس	15–40 µm	تحمل UV جایی که پخت عمقی ثانویه است

HMMAT برای پوشش‌های UV.

جذب روغن پایین — ویسکوزیته تحت کنترل

بدون واکس — بدون مهار پخت

سازگاری کامل با سیستم‌های قوس جیوه و UV-LED

تامین FCL در مقیاس تولید UV

قابلیت‌های تامین OEM

راهنمای انتخاب گرید برای پوشش‌های UV

سوالات فنی متداول

راه‌حل پوشش UV پیشنهادی

Talk to a chemist about HMMAT برای پوشش‌های UV.