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IOTA LSR 3040 Series is a no-post-cure high-grip liquid silicone rubber product. Main features include two-component 1:1 mixing ratio, excellent mold release, VOC below 0.5%, fast heat curing, and excellent mechanical properties. Typical applications include baby care, food contact, seals, and other injection-molded products. Curing data: for 2 mm thickness, 90 seconds at 130°C; 45 seconds at 150°C. The series includes 3040, 3050, and 3060 grades with cured Shore hardness of 40, 50, and 60; tensile strength of about 9, 10, and 9 MPa; elongation of about 580%, 550%, and 450%; and tear strength of about 35, 40, and 38 kN/m, respectively.
Selection should not rely only on “no post-cure,” “VOC <0.5%,” or “high grip.” First confirm the specific application and contact medium, product structure and thickness, mold and release method, same-batch A/B 1:1 metering and mixing, whether the material is thoroughly stirred, curing temperature and time, mechanical property criteria, and the regulatory compliance and migration testing required for baby care and food contact. This article does not equate “no post-cure” with no post-treatment being needed for all thicknesses and structures, nor does it equate VOC data with food-contact compliance. IOTA can provide liquid silicone rubber raw materials and corresponding product data; the company does not provide complete formulations or formulation development services.
The series is used for baby care, food contact, seals, and other injection-molded products. Different applications focus on different points: baby care on safety compliance, soft feel, and durability; food contact on regulatory compliance, migration, and odor; seals on compression set, rebound, grip/sealing force, and media resistance; other injection-molded products on flow, release, and molding efficiency. Selection should start with the final product, contact object, sealing conditions, and regulatory requirements, not just “no post-cure” or “high grip.”
| What to confirm | What to specify in an inquiry or sample request |
|---|---|
| Application and contact medium | Baby care, food contact, seals, or other injection-molded products; contact substance, service temperature, and time |
| Regulation and compliance | Food-contact regulations, baby-product safety requirements, customer restricted-substance list; type of compliance documents required |
| Product structure and mold | Product dimensions, thickest section, mold material, release method, whether release agent is used |
| Mixing and metering | Two-component A:B = 1:1; only same-batch A/B may be mixed; metering accuracy, mixing uniformity, workable time, and injection equipment |
| Material pretreatment | Whether thoroughly stirred before transfer to container; whether fillers or colorants are uniformly dispersed |
| Curing conditions | Curing temperature and time; data give 130°C/90 s and 150°C/45 s for 2 mm thickness; confirm with actual product thickness and equipment |
| Acceptance criteria | Hardness, tensile strength, tear strength, elongation, compression set, rebound, grip/sealing force, media resistance, VOC, odor, migration, etc. |
| Sample preparation | Sample size, thickness, mold condition, number of cure cycles, secondary heating, sample quantity |
If the customer already has a test specification, obtain the original document first. When criteria are missing, confirm them with the project owner and test laboratory before making samples, so that both sides do not discover different interpretations of “pass” after testing.
IOTA LSR 3040 Series uses a two-component 1:1 mixing ratio. Important notes: the product is platinum-catalyzed, with the platinum catalyst in Component A; strict care is required during use to avoid catalyst poisoning. Only Component A and Component B of the same batch number may be mixed together. To ensure optimum flow and uniformity, the material must be thoroughly stirred before transfer into a container.
In production, confirm metering accuracy, mixing uniformity, workable time, and injection equipment. The data give 90 seconds at 130°C and 45 seconds at 150°C for 2 mm thickness. These conditions correspond to a specific thickness and cannot be directly applied to thicker or more complex products. “No post-cure” should be understood as the series reaching target properties under confirmed primary curing conditions; it does not mean that any thickness or equipment requires no post-treatment. Whether secondary heating or post-treatment is needed should be confirmed with the specific product and customer specification.
The product is described as high-grip liquid silicone rubber. For seals, grip and sealing performance cannot be judged only by hardness or tensile strength; compression set, rebound, dimensional stability, media resistance, and actual assembled sealing force should also be evaluated. The 3040, 3050, and 3060 grades have hardness of 40, 50, and 60, respectively. Grade selection should be confirmed with the seal structure, assembly force, and media conditions, not just by hardness level.
Mold release, VOC, and mechanical properties should also be understood together with test methods. VOC below 0.5% should be understood with sample state, test method, and customer limit; it cannot be directly equated with food-contact compliance or odor acceptance. For food contact and baby care, obtain the corresponding regulatory compliance statements and necessary migration test reports, and evaluate against the customer restricted-substance list.
Technical data: Components A and B are transparent with density about 1.12 g/cm³; Component A viscosity about 320–350 Pa·s, Component B about 280–300 Pa·s, and the mixture about 300–350 Pa·s; cured density about 1.11–1.12 g/cm³. Cured 3040/3050/3060 hardness is 40/50/60, tensile strength 9/10/9 MPa, elongation 580%/550%/450%, and tear strength 35/40/38 kN/m. These are typical data under the corresponding conditions in the product data and should be understood together with product thickness, mold, curing, and test methods.
Baby care and food contact applications involve safety compliance; material feature descriptions alone cannot determine final-product compliance. The final product must also be evaluated with formulation, process, additives, and contact conditions. For seals, compression set and media resistance should be tested separately.
Obtain the customer’s service conditions, regulatory requirements, and acceptance criteria; confirm whether “no post-cure,” VOC, food contact, baby care, and high-grip requirements are targets or existing results.
Specify application, contact medium, product structure and thickest section, mold, same-batch A/B = 1:1 mixing/metering, material stirring, curing temperature and time, and post-treatment arrangement.
Check the current IOTA LSR 3040 Series data, then have the user make representative samples and keep records of mixing, injection, curing, release, and post-treatment.
Arrange tests as agreed; keep sample identity, test conditions, observation photos, and evaluation results in the report. Before expanding use, confirm whether the samples represent actual workpieces.
IOTA/Anhui Iota Silicone Oil Co., Ltd. positions itself as a solution provider across the organosilicon industry chain and can provide liquid silicone rubber raw materials and corresponding product data. When communicating, provide the final product, contact medium, regulatory requirements, sealing conditions, mold, and curing equipment together to facilitate candidate screening; the company does not provide complete formulations or formulation development services.
It should not be interpreted absolutely. The series can reach target properties under confirmed primary curing conditions, but whether thicker products, complex structures, or specific compliance requirements need secondary heating or post-treatment should be confirmed with the specific product and customer specification.
No. Curing time varies with thickness, mold temperature, injection amount, and equipment efficiency. Confirm with the thickest section and representative samples.
The data explicitly require that only Component A and Component B of the same batch number be mixed together. Mixing different batches may affect metering, curing, and property consistency; follow the customer’s raw-material management and supplier requirements.
The platinum catalyst is in Component A. Strict care is required during use to avoid contact with substances known to poison platinum catalysts. Specific material compatibility should be included in the customer’s raw-material approval and site management requirements.
No. For seals, compression set, rebound, dimensional stability, media resistance, and actual assembled sealing force should also be evaluated. The 3040/3050/3060 grades have different hardness and should be selected according to the seal structure.
No. Food-contact compliance also requires corresponding regulatory compliance statements, migration testing, and customer restricted-substance evaluation; it cannot be judged from the VOC value alone.
