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Self-adhesive hand-feel-modified silicone rubber IOTA LSR 3M80-75 for textiles is a self-adhesive two-component addition-cure silicone rubber specifically for textiles, featuring low viscosity, excellent adhesion, excellent touch, excellent mechanical properties, excellent fatigue resistance, and fast heat curing. When selecting it, first confirm the state of the A/B components, the 1:1 mixing ratio, and the platinum catalysis conditions, then evaluate post-cure performance. Merely seeing the words "hand-feel-modified silicone rubber for textiles" is not enough to decide whether it can be used on an existing production line.
This article focuses on procurement and sampling for textile surface coating and silicone surface coating: products all called two-component addition-cure silicone rubber differ greatly in the viscosity of Component A and Component B, and the mixing ratio, same-batch requirement, and platinum catalyst conditions all affect application and curing. Before requesting a quote, clearly state the equipment, substrate, and film-thickness conditions; this reduces the risk of receiving samples that cannot be applied.
Addition-cure silicone rubber, condensation-cure silicone rubber, and silicone resin are different product categories. Condensation-cure silicone rubber has a different curing mechanism; silicone resins often serve as film-forming or bonding components; addition-cure silicone rubber such as IOTA LSR 3M80-75 is delivered as A and B two-component forms, cures via platinum-catalyzed addition reaction, forms a transparent elastomer after curing, and can be used for hand-feel modification to provide excellent surface touch. Actual formulations still depend on component composition and reactive groups; products cannot be directly interchanged based on name alone.
IOTA LSR 3M80-75 is a platinum-catalyzed product; the platinum catalyst is in Component A, and strict attention must be paid during use to avoid catalyst poisoning. Only Components A and B of the same batch number can be mixed together. Before sampling, confirm the respective states of Components A and B, the mixing ratio, and the same-batch condition.
| Delivery Form | Confirm Before Sampling | Conditions Easily Overlooked When Switching Materials |
|---|---|---|
| Component A (contains platinum catalyst) | Color (transparent), density (1.05 g/cm³, 23°C), viscosity (75000 mPa·s, 23°C, ISO3219) | Avoid catalyst poisoning; cleanliness of containers and tools |
| Component B | Color (transparent), density (1.05 g/cm³, 23°C), viscosity (19500 mPa·s, 23°C, after stirring, ISO3219) | Must be used with Component A of the same batch number |
| A+B mixed system | Mixing ratio (by weight A:B=1:1), mixed viscosity (47500 mPa·s, 23°C, after stirring, ISO3219) | Stir thoroughly before transfer; mixing sequence and pot life |
This table is intended for organizing sampling documents and cannot serve as a formulation for equivalent substitution among different systems. When comparing price and addition level, normalize to a comparable mixing-ratio basis and check the test methods in each document.
IOTA LSR 3M80-75 has low viscosity: Component A viscosity 75000 mPa·s, Component B viscosity 19500 mPa·s (23°C, after stirring), and mixed viscosity 47500 mPa·s (23°C, after stirring). It has excellent adhesion and is typically used for textile surface coating, silicone surface coating, and hand-feel modification to provide excellent surface touch. These data can be used to screen sampling directions but cannot directly serve as acceptance results for a customer's finished part.
Application method and application name only indicate the applicable direction. For an actual product, the compatibility of the rubber compound with the substrate, color paste, and additives must also be checked. If strength and elasticity are required, hardness, tensile strength, elongation, and tear strength should be tested together, avoiding material selection based on a single hardness indicator.
The mixing ratio (by weight) of Components A and B is A:B=1:1, and completion of the specified curing program are two different judgment items. To ensure optimal flowability and uniformity of the material, it must be stirred thoroughly before being transferred into a container. Only Components A and B of the same batch number can be mixed together. The specific program should follow the technical data of the selected product.
Regarding curing conditions, at a thickness of 1 cm, 23°C requires 48 h and 120°C requires 5 min. During sampling, record the mixing ratio, viscosity after stirring, ambient temperature, curing temperature, and curing time. The mixing ratio only reflects the formulation control condition; whether large or thick parts can meet process requirements should be verified against actual curing records. Do not directly transfer the mixing ratio or curing conditions of another model to a new material. Also note that the platinum catalyst is in Component A, and strict attention must be paid during use to avoid catalyst poisoning.
| Working Conditions to Provide | What Must Be Clearly Stated | Corresponding Verification |
|---|---|---|
| Substrate and pretreatment | Textile, silicone surface, or other substrates; cleaning and surface treatment | Adhesion, appearance |
| Application and film thickness | Coating or other application methods; wet or dry film thickness range (curing time referenced to 1 cm thickness) | Leveling, bubbles, missing adhesive |
| Mixing and curing equipment | A:B mixing ratio (1:1), viscosity after stirring, curing temperature and time (23°C 48 h or 120°C 5 min, 1 cm thickness) | Curing state and performance reproducibility |
| Service environment | Continuous or intermittent use, bending fatigue, cleaning method | Fatigue resistance and required media resistance |
| Functional requirements | Whether it serves functions such as hand-feel modification, excellent touch, adhesion | Verify according to actual part and service environment |
For statements such as excellent touch, excellent mechanical properties, and excellent fatigue resistance in product introductions, the test object, method, formulation, and judgment criteria must be checked before use. Test results for the base rubber, experimental sheets, and the customer's complete part should be recorded separately.
First fix the substrate, pretreatment, and existing application conditions, and list the acceptance items that must be met (adhesion, hardness, tensile strength, elongation, tear strength, touch, etc.).
Request the TDS and SDS of candidate rubber compounds from the supplier, and check the A/B component states, mixing ratio (1:1), same-batch requirement, and curing program; if information is insufficient, complete it first—do not presuppose a model.
Sample using the same substrate and comparable film thickness, and keep records of formulation, batch, mixing, and curing; note that the platinum catalyst is in Component A, avoid catalyst poisoning, only Components A and B of the same batch number can be mixed together, and the material must be stirred thoroughly before transfer.
Check initial appearance and adhesion, then arrange fatigue, hand-feel, or media-resistance testing according to the application. Write the test conditions and pass thresholds into the sampling confirmation sheet.
Is IOTA LSR 3M80-75 single-component or two-component?
It is an A/B two-component addition-cure silicone rubber with a mixing ratio (by weight) of A:B=1:1, curing via platinum-catalyzed addition reaction.
Can Components A and B from different batches be mixed?
No. Only Components A and B of the same batch number can be mixed together.
Why must catalyst poisoning be avoided?
The product uses platinum catalysis, and the platinum catalyst is in Component A. Strict attention must be paid during use to avoid catalyst poisoning; containers, tools, and contact materials should all be kept clean.
How long does curing take?
At a thickness of 1 cm, 23°C requires 48 h and 120°C requires 5 min; actual parts should be verified against the specific thickness and curing equipment.
What is the viscosity after mixing?
Component A viscosity is 75000 mPa·s, Component B viscosity is 19500 mPa·s, and the A+B mixed viscosity is 47500 mPa·s (all at 23°C, after stirring, ISO3219).
Which indicators should be checked for post-cure performance?
After curing (at 125±°C, vulcanized for 10 min) it is transparent, with density 1.05 g/cm³ (23°C, ISO 2781), hardness (DIN 53505) 40, tensile strength ≥5 MPa (DIN 53504), elongation ≥200% (DIN 53504), and tear strength ≥10 KN/m (ASTM D624B). These should be verified against the specific part and service environment.
What information should be provided at minimum when requesting a quote?
Provide the substrate, pretreatment, application method, target film thickness, mixing and curing equipment, and service conditions, and list acceptance items (adhesion, hardness, tensile strength, elongation, tear strength, touch, etc.). This information is more helpful for screening samples than asking only for a hardness number.
IOTA LSR 3M80-75 Self-Adhesive Hand-Feel-Modified Silicone Rubber for Textiles: for preliminary verification of the A/B two-component form, 1:1 mixing ratio, and platinum-catalyzed curing direction. The specific formulation depends on the substrate, application method, film thickness, and curing conditions.
