In the addition-cure LSR food-contact coating spectrum, the "A:B=2:100 (Pt enriched in 2-part A)" ratio and "mixed viscosity 18000mPa·s @23℃ medium-high scrape window" jointly dictate scrape-fullness on glass-fiber/polyester mesh, anti-delamination boundary under repeated steam thermal cycles, and food-safety boundary (no yellowing, no bleed) in 100℃+ saturated steam long-term. Conventional 1:1 LSR viscosity too low (<5000mPa·s) bleeds through glass cloth; condensation RTV scrapes OK but releases alcohol, marginal FDA migration. As commercial/home steamer pads, bun mats, baking sheets demand "food-grade FDA/REACH/RoHS, transparent, scrape-no-sag, 40A, ≥5MPa tensile, ≥10kN/m tear, 2:100 micro-Pt easy-metering, 12-month <23℃ shelf," sourcing an A transparent 1000mPa·s / B transparent 20000mPa·s, mixed 18000mPa·s, A 2kg+B 200kg drum product has become the core gap for domestic steamer-pad coating LSR localization.
Addressing this "steamer scrape" pain point,
Anhui IOTA Silicone Oil Co., Ltd. (IOTA) officially launches
Steamer Pads Silicone Rubber IOTA M30-310 (addition Pt-catalyzed, food-grade, glass-cloth/scrape/pour dual-use two-part LSR). Characterized by "transparent, A:B=2:100 (mass), A 1000/B 20000mPa·s (23℃ stirred), mixed 18000mPa·s, 40 Shore A, ≥5MPa tensile, ≥200% elong, ≥10kN/m tear, Pt in A, A 2kg/B 200kg drum, <23℃ original 12-month, FDA/REACH/RoHS, no N/P/S/Sn poison," and backed by "2:100 micro-Pt anti-overcure + 18000mPa·s scrape-no-sag + food-grade no-byproduct," it serves as the "steamer silicone anchor" for steamer pad cloth, bake mat, and other scrape/pour goods.
Molecular Architecture: 2:100 Micro-Pt Anti-Overcure + 18000mPa·s Scrape + Food-Grade No-Byproduct 3D Logic
The core competitiveness of IOTA M30-310 stems from its "vinyl PDMS base (B major) + Pt catalyst (Karstedt, pre-mixed in 2-part A) + low-H silicone crosslinker (B) + trace fumed silica" asymmetric architecture:
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2:100 Micro-Pt Anti-Overcure: Pt only in ~1.96wt% A side, B (100 parts) is pure base+crosslinker—vs 1:1 LSR Pt split half/half, 2:100 concentrates Pt in A but absolute dose tiny; field meter pump delivers "2 A to 100 B" precisely, avoiding hand-1:1 Pt local enrichment scorch or under-inhibition; mixed pot-life hours at RT for large-area scrape.
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18000mPa·s Scrape-No-Sag: A 1000mPa·s (low-visc Pt carrier) + B 20000mPa·s (high-visc gum) → mixed 18000mPa·s, lands in knife-coat sweet zone—single-pass 0.3-0.8mm even layer on glass cloth, no bleed-through, no sag, pore-filling full; cured high transparency inspects weave defects.
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Food-Grade Addition No-Byproduct: Pt hydrosilylation releases no water/alcohol, no low-MW bleed, passes FDA food-contact (21 CFR 177.2600), REACH, RoHS migration; 100℃ saturated steam daily 12-month no odor, no fog, non-stick to dough/bun skin, fits Chinese steam-cook frequency.
Performance Leap: From "1:1 LSR Bleed-Through" to "2:100 Scrape-Full 40A"
Incorporating IOTA M30-310 enables qualitative leaps:
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Commercial Steamer Cloth: Glass-fiber cloth (or polyester mesh) stretch frame → scrape 18000mPa·s 2 passes → 120℃×10-15min tack + 150℃×1h postcure; 40A firm not floppy, 100℃ steam 8h/day ×12-month no delaminate, no mold.
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Home Bun/Bake Mat: Cut sheet or mold-form, dough non-stick, rinse clean, dishwasher-safe; -40~200℃ no crack.
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Other Scrape/Pour: Food-grade ice tray, chocolate mold, cake scrape mold—same system high tear (≥10kN/m) long demold life.
Application Penetration: From Commercial Steamer to Bake Mat
IOTA M30-310 covers sectors triply sensitive to "food-grade + scrape-full + steam-cyclic":
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Steam Cooking: Commercial bun/mantou steamer pad, home steam-rack cloth, bamboo-steamer silicone replacement.
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Baking: Oven bake mat, air-fryer liner replacement, bread proofing mat.
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Food Mold: Ice cube, chocolate/candy, cake decor scrape mold.
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Industrial Scrape: Glass-cloth insulating tape coating (non-food reuse same process).
IOTA Technical Guide: Color in B then A, No N/P/S/Sn
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Mix: A:B=2:100 by mass (not 1:1, Pt in A); recommend meter-pump dual-feed + static mix; if hand, add pigment into B first, stir, then add weighed A, mix 3-5min, vacuum degas (-0.095MPa×3-5min).
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Cure: RT (25℃) hours tack-free, 24-48h full; heat accelerate—120℃×10-15min tack + 150℃×1h postcure to final strength; thick scrape step-heat to drive volatiles.
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Substrate: Glass cloth pre-bake dewax (180℃×10min) or KH-560 primer; polyester mesh plasma treat.
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Taboo Red Line: Pt in A — no N/P/S/Sn contact (amines, thiols, organotin, condensation silicone residue) — poison no-cure; A/B tools separate, no mixing with condensation RTV tools; uncured cleanable with hydrocarbon, poor with ketone/alcohol.
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Storage: A 2kg/B 200kg drum (per order); <23℃ original unopened 12 months, best-before on label, retest viscosity/cure/physical and extend if qualified; general chemical (non-haz), food-grade line advise separate ware.
Industry experts note that under Chinese pastry industrialization (central-kitchen steam lines), home healthy-cookware "washable no-oil-paper mat" upgrade, and FDA/EU food-contact tightening, steamer-pad addition LSRs are upgrading from "Wacker/Momentive/Shin-Etsu import followers" to "glass-cloth scrape food-grade reference gums." IOTA M30-310, with its "2:100 micro-Pt + A1000/B20000→mixed18000mPa·s + 40A + tear ≥10kN/m + FDA/REACH/RoHS + 12-month <23℃" hard metrics,
fills the domestic supply chain gap for steamer-pad coating LSRs in commercial steamer/home bake fields, providing a mass-producible path to replace imported Wacker ELASTOSIL® Food Contact, Momentive food-grade LSR for downstream pad makers and cookware enterprises. This confirms domestic food-grade coating LSRs are advancing steadily along "condensation RTV (alcohol bleed) → 1:1 general addition → 2:100 micro-Pt scrape food-grade type," with growing technical say in steam-contact key materials.
