Hits: 1678 img
| Property | IOTA 1500 Series |
|---|---|
| Silicone Type | Addition-cured liquid silicone rubber |
| Components | Two-component A/B system |
| Mixing Ratio | A:B = 1:1 by weight |
| Appearance | Semi-transparent |
| Hardness Range | Shore A 0–50 |
| Viscosity Range | 5,000–25,000 cps |
| Tensile Strength | 2.0–4.6 MPa |
| Tear Strength | ≥2–17 kN/m |
| Elongation at Break | ≥170–550% |
| Shrinkage | ≤0.1% |
| Temperature Resistance | Up to 250°C |
| Long-Term Use Temperature | Within 200°C |
| Main Mold Applications | Food molds, candy molds, cake molds, soap molds |
The technical values above are product reference data for the IOTA 1500 Series. Individual grades have different mechanical and viscosity properties.
Food grade silicone rubber for mold making is a liquid silicone material that is mixed, poured into a mold-making form, cured and then removed to create a flexible silicone mold.
For mold production, important material properties include:
Mixing ratio
Viscosity
Hardness
Tear strength
Tensile strength
Elongation
Shrinkage
Temperature resistance
Demolding performance
These properties affect how easily the silicone flows around a master model, how accurately it reproduces surface details, how easily the finished mold can be removed and how well the mold withstands repeated use.
IOTA 1500 Series has a stated shrinkage of ≤0.1% across the listed grades.
Low shrinkage is important in mold making because dimensional changes in the cured silicone can affect the final mold dimensions. A low-shrinkage silicone material can help maintain the dimensional relationship between the original model and the finished mold.
For manufacturers producing detailed molds, shrinkage should therefore be considered together with hardness, viscosity and the geometry of the mold.
IOTA 1500 Series provides multiple hardness grades from Shore A 0 to Shore A 50.
| Grade | Hardness | Viscosity | Tensile Strength | Elongation | Shrinkage |
|---|---|---|---|---|---|
| IOTA 1500 | Shore A 0 | 5,000±1,000 cps | 2.0 MPa | ≥500% | ≤0.1% |
| IOTA 1505 | Shore A 5±2 | 5,500±1,000 cps | 2.5 MPa | ≥550% | ≤0.1% |
| IOTA 1510 | Shore A 10±2 | 6,000±1,000 cps | 3.0 MPa | ≥500% | ≤0.1% |
| IOTA 1515 | Shore A 15±2 | 8,000±1,000 cps | 3.2 MPa | ≥450% | ≤0.1% |
| IOTA 1520 | Shore A 20±2 | 10,000±1,000 cps | 3.5 MPa | ≥400% | ≤0.1% |
| IOTA 1525 | Shore A 25±2 | 15,000±1,000 cps | 4.0 MPa | ≥420% | ≤0.1% |
| IOTA 1530 | Shore A 30±2 | 20,000±1,000 cps | 4.5 MPa | ≥350% | ≤0.1% |
| IOTA 1540 | Shore A 40±2 | 22,000±1,000 cps | 4.5 MPa | ≥330% | ≤0.1% |
| IOTA 1550 | Shore A 50±2 | 25,000±1,000 cps | 4.6 MPa | ≥170% | ≤0.1% |
A softer silicone grade generally provides greater flexibility, while a harder grade provides a firmer mold structure.
For complex models with undercuts or areas requiring significant mold flexibility, lower-hardness silicone can be considered.
For molds that require greater structural support and dimensional stability during handling, a higher-hardness grade may be considered.
The appropriate hardness should be selected according to the master model geometry, demolding requirements, mold thickness and intended production process.
The stated viscosity range of IOTA 1500 Series is 5,000–25,000 cps, depending on the grade.
Lower-hardness grades generally have lower viscosity within this product series, while higher-hardness grades have higher viscosity.
Viscosity affects how the liquid silicone flows around the master model before curing. For detailed or complex molds, material flow should be evaluated together with mold geometry and the required level of bubble control.
The listed IOTA 1500 Series grades provide tensile strength from 2.0 to 4.6 MPa and elongation at break from ≥170% to ≥550%.
Tear strength ranges from ≥2 to ≥17 kN/m depending on the grade.
These properties are relevant to mold durability because silicone molds need sufficient elasticity and tear resistance to withstand demolding and repeated handling.
The lower-hardness grades provide particularly high elongation, while higher-hardness grades provide higher tensile strength and tear strength within the listed series.
The basic mold-making process consists of three steps:
Mix Component A and Component B at a ratio of 1:1 by weight.
Accurate weighing is important because the 1:1 ratio is specified by weight rather than volume.
The two components should be mixed thoroughly to reduce the risk of incomplete curing.
For applications with high surface-quality requirements, vacuum degassing can be used to remove air bubbles from the mixed silicone.
The manufacturer recommends particular attention to vacuum treatment for silicone grades with hardness above Shore A 20.
Bubble control is important because trapped air can create defects on the surface of the finished mold.
After mixing and, when required, degassing, pour the liquid silicone into the mold box.
Pouring from a controlled height and allowing the silicone to flow gradually over the master model can help reduce the introduction of additional bubbles.
Yes. Heating can be used to accelerate the curing rate of the silicone rubber.
The actual curing conditions should be determined through small-scale trials based on the mold design, silicone grade and production requirements.
Before large-scale production, a small trial is recommended to confirm the processing conditions.
IOTA 1500 Series is described for applications including:
Food molds
Candy molds
Cake molds
Soap molds
Soft silicone mold products
Other flexible molded silicone applications
The product is also described for producing soft silicone rubber products such as mannequins, chest pads and shoulder pads.
For food-contact applications, the specific regulatory and testing requirements of the target market should be confirmed separately. The term “food grade” should not by itself be interpreted as universal compliance with every food-contact regulation in every country.
IOTA 1500 Series is an addition-type liquid silicone rubber.
Addition-cured silicone systems use two components that are mixed at a specified ratio and then cured to form an elastic silicone rubber.
For mold-making applications, the material system provides a combination of flexibility, low stated shrinkage and a broad hardness range.
However, addition-cured silicone can be sensitive to certain chemical substances that interfere with curing. Material compatibility should therefore be checked before production.
The manufacturer states that the 1:1 addition product should not come into contact with substances including:
Tin compounds
Phosphorus compounds
Ammonium compounds
Chlorine-containing compounds
Carboxylic acids
Thiols
Hydroxyl-containing compounds
These substances may interfere with curing and can result in incomplete or failed vulcanization.
If a mold has previously been made using condensation-cured silicone, the mold or relevant surfaces should be properly cleaned before using the addition-cured silicone system.
A practical selection process should consider five main factors:
Complex models and undercuts generally require sufficient flexibility for demolding.
IOTA 1500 Series covers Shore A 0 to Shore A 50, allowing manufacturers to select different levels of mold firmness.
Viscosity ranges from 5,000 to 25,000 cps depending on grade. Mold complexity and required surface replication should be considered when selecting viscosity.
Tear strength, tensile strength and elongation should be evaluated according to the expected demolding method and number of mold cycles.
IOTA 1500 Series is stated to withstand temperatures up to 250°C, with long-term stability stated for use within 200°C. Actual operating conditions should be validated for the specific application.
The mixing ratio of Component A to Component B is 1:1 by weight.
IOTA 1500 Series provides hardness grades from Shore A 0 to Shore A 50.
The stated viscosity range is 5,000–25,000 cps, depending on the grade.
The stated shrinkage is ≤0.1% for the listed grades.
The product is stated to be resistant to temperatures up to 250°C, with long-term stability for use within 200°C.
The listed elongation at break ranges from ≥170% to ≥550%, depending on the grade.
Vacuum degassing is recommended for applications with high requirements for bubble-free molds. The manufacturer specifically notes that silicone with hardness above Shore A 20 generally requires vacuum treatment before use.
Yes. Heating can be used to accelerate the curing rate. The appropriate temperature and curing conditions should be established through testing.
The product is described as food grade and is listed for food molds, candy molds and cake molds. However, the specific food-contact requirements of the target market should be confirmed separately.
Contact with substances that may inhibit addition curing should be avoided, including tin, phosphorus, ammonium, chlorine-containing compounds, carboxylic acids, thiols and hydroxyl-containing compounds.
IOTA 1500 Series is a food grade addition-cured liquid silicone rubber for mold making with a 1:1 mixing ratio by weight, Shore A hardness options from 0 to 50, viscosity from 5,000 to 25,000 cps and stated shrinkage of ≤0.1%.
The series provides different combinations of hardness, viscosity, tensile strength, tear strength and elongation, allowing manufacturers to select a grade according to mold geometry, flexibility requirements, demolding conditions and production process.
For manufacturers developing food molds, candy molds, cake molds or other flexible silicone molds, the key selection factors are hardness, viscosity, shrinkage, mechanical strength, temperature conditions and compatibility with the master model.
