IOTA M6750 is a two-component food-grade liquid silicone rubber designed specifically for kitchenware, without the need for two-stage vulcanization. The VOC content is ≤ 0.4%, meeting the requirements of BfR, FDA, and RoHS. Compared with M6020, this product has been optimized for high-temperature usage scenarios of kitchenware, with stricter VOC control (≤ 0.4% vs ≤ 0.5%), closer to the 0.5% limit stipulated in the new GB 4806.16-2025 standard.
Key performance data (after curing)
Model Hardness HA Stretch strength MPa Extension rate % Tear strength KN/m Density g/cm³
Model Hardness HA Stretch strength MPa Extension rate % Tear strength KN/m Density g/cm³
M6750-20 20 7 650 20 1.10
M6750-30 30 7 600 25 1.11
M6750-40 40 8 580 30 1.11
M6750-50 50 10 500 40 1.12
M6750-60 60 9 400 35 1.12
M6750-70 70 9 340 32 1.14
The viscosity unit is the value at 23℃ and 10 s⁻¹ conditions (the unit is not explicitly marked, presumed to be Pa·s or of a similar order), which is basically consistent with the M6020 series. Technical indicators
The core differences between M6750 series and M6020 series
Comparison item M6750 series M6020 series
Comparison item VOC ≤0.4% ≤0.5%
Compliance certification BfR, FDA, RoHS BfR, FDA, RoHS
Curing conditions Not specified ("See curing time") 130℃/90s or 150℃/45s (2mm)
Hardness level 20–70 HA (6 levels) 25–70 HA (6 levels)
Mechanical properties Exactly the same as M6020 Exactly the same as M6750
The hardness, tensile strength, elongation, tear strength and density data of both are completely consistent. The only difference is that M6750 has a lower VOC (≤0.4%), with a positioning more inclined towards high-temperature scenarios for kitchenware. Product introduction However, the M6750 materials data does not provide specific curing conditions, and it is necessary to confirm with the supplier.
Key verification items for kitchenware scenarios
Volatile substances (VOC)
GB 4806.16-2025 requires volatile substances to be ≤ 0.5 g/100g (0.5%). M6750 indicates ≤0.4%, leaving a certain safety margin. However, note: The VOC label in the materials is "≤0.4%", while the product introduction writes "VOC is less than 0.35%". There is a difference, and it is necessary to confirm the actual value with the supplier.
High-temperature migration amount
Kitchenware (such as silicone spatulas, baking molds) often come into contact with oily foods at 100–200℃. GB 4806.16-2025 has added a migration test condition of 100℃/2h, and the simulated oil-containing food has been changed to vegetable oil. It is necessary to verify the total migration amount (≤10 mg/dm²) and the consumption of potassium permanganate (≤10 mg/kg).
Compression permanent deformation
The data is not listed. If used for sealing rings (such as pressure cooker sealing pads), specific test data should be obtained from the supplier.
Oil resistance
Ordinary silicone will swell when in contact with edible oil. If used for kitchenware that comes into contact with oils for a long time, it is necessary to assess whether fluorosilicone rubber should be used as an alternative.
Complete selection decision table for four materials
Model Core positioning VOC Compliance certification Applicable scenarios Key differences
Model Core positioning VOC Compliance certification Applicable scenarios Key differences
M3054 Low compression permanent deformation Not labeled Not labeled General sealing parts, long-term static compression Optimal pressure variation performance
M3055 General sealing part Not labeled Not labeled General sealing parts, miscellaneous parts Cost advantage
M6020 General two-stage vulcanization-free ≤0.5% BfR, FDA, RoHS Infant and children care, food contact Excludes post-curing process
M6040K General two-stage vulcanization-free + high bite force ≤0.5% BfR, FDA, RoHS Reinforced molding, insert injection molding Stronger adhesion to base material
M6750 Cookware-specific food grade ≤0.4% BfR, FDA, RoHS For kitchenware, baking molds, high-temperature sealing Minimum VOC, high-temperature migration resistance
Information to be prepared before contacting the supplier
Provide non-confidential application summary: Product type (sponge spatula/baking mold/sealing ring), temperature range of use, contact medium (water/oil/acid), target hardness, injection or molding process, whether GB 4806.16-2025 compliance is required, current problems encountered and estimated purchase volume. When there are clear requirements for VOC, migration amount and compression permanent deformation, it is necessary to also specify the testing method and acceptance criteria.
FAQ
How to choose between M6750 and M6020?
If the product is used in high-temperature kitchen scenarios (such as baking molds, silicone spatulas), and has stricter requirements for VOC, then choose M6750; if it is a general food-contact product (such as baby bottles, sealing rings), M6020 can meet the requirements. Product Introduction
2. Is the VOC level 0.35% or 0.4%?
The product introduction states "VOC less than 0.35%", while the technical indicators say "VOC ≤ 0.4%". There is a discrepancy. It is necessary to confirm the actual value and testing method with the supplier.
3. What are the curing conditions?
The materials only state "See curing time", but no specific values are given. It is necessary to request the complete TDS from the supplier for confirmation.
4. Can it be used in infant products?
The information shows compliance with BfR, FDA, and RoHS, but it does not clearly indicate it is for infant use. GB 4806.16-2025 has stricter requirements for infant products (volatile substances ≤ 60 mg/kg), and it is necessary to confirm with the supplier whether it meets the requirements.
5. Why must catalyst poisoning be avoided?
When the platinum catalytic system comes into contact with substances containing sulfur, phosphorus, nitrogen, organic tin, etc., it may not cure or the surface may become sticky. Important matters include checking the base material, release agent, and pigment in advance.