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JY-131M Mold-Making Liquid Silicone Rubber

1. Addition-curing two-component silicone rubber.
2. Good workability and self-demolding properties.
3. Dimensional stability and resistance to springback.
4. Cures at room temperature, rapidly cures upon heating.

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Product Detail

1. Product Features

1. Addition-curing two-component silicone rubber.

2. Good workability and self-demolding properties.

3. Dimensional stability and resistance to springback.

4. Cures at room temperature, rapidly cures upon heating.


2. Technical Parameters Before and After Curing (Not to be Used as Product Standards)

Property

Unit

Values

Test Method

Before Vulcanization

Component

A

B

Appearance

Transparent Liquid

Transparent Liquid

Visual Inspection

Viscosity at 25℃ after stirring

Pa·s

≤80

≤1

GB/T 2794-1995

Mixing ratio

A:B

10:1

Pot life at 25℃

min

80

Curing time at 25℃

h

20

Curing time at 60℃

min

50

Curing time at 80℃

min.

40

After Vulcanization

Tensile strength

MPa

≥5.5

GB/T 528-2009

Elongation at break

%

≥400

GB/T 528-2009

Tear strength

kN/m

≥15

GB/T 529-2008

Linear shrinkage

%

≤0.1

Shore A hardness

40±3

GB/T 531-1999

The above data are for reference only and should not be used as performance indicators. (Sample curing conditions: Room temperature curing for 24 hours, curing at 80℃ for 60 minutes)


3. Product Applications

1. Soft mold molding for resin-based composite materials.

2. Molds for precision casting.

3. Simulation replication for other craft products.


4. Product Color

1. After mixing components A and B, the result is transparent fluid.

2. Custom colors are available upon request.


5. Product Usage Method

1. Pre-mixing: Before use, thoroughly stir components A and B separately and to be ready.

2. Weighing: Weigh components A and B according to the weight ratio of 10:1.

3. Mixing: Thoroughly mix the two components of the adhesive, using specialized mixing equipment (such as a small planetary mixer). When mixing by hand, pay attention to scraping the bottom and sides of mixing container.

4. Bubble removal: Bubble removal under vacuum in specialized mixing equipment. Alternatively, place the mixed adhesive and its container in a vacuum degassing equipment and perform vacuum degassing. During the vacuum degassing process, the mixture's liquid level may rise to 3 to 4 times the original volume, then automatically collapse. Maintain vacuum for 4 to 6 minutes after the bubbles collapse, then release the vacuum.

5. Mold making: It is recommended to use Liquid Injection Molding (LIM) for mold preparation. After injecting the adhesive into the mold cavity, let it stay at room temperature for 24 hours, then open the mold to get the silicone rubber model. Post-curing the silicone rubber model at 80-100℃ for 2 hours after room temperature vulcanization can extend the mold's service life. To improve mold-making efficiency, it can also injecting the adhesive into the mold cavity and heating (60℃-90℃) cure.


6. Precautions

1. Certain materials, compounds, vulcanizing agents, and plasticizers will hinder the curing of JY-131M.

Mainly including:

- Organotin and other organometallic compounds.

- Silicone rubber containing organotin catalysts.

- Sulfur, polysulfides, polysulfone materials, or other sulfur-containing items.

- Amines, ethyl carbamate, or amine-containing items.

- Unsaturated hydrocarbon plasticizers.

- Some residues of flux.

2. The components contained in the A and B components of JY-131M have been proven over the years to require no special precautions, only general industrial health and safety standards are needed.


7. Product Packaging

JY-131M product components A and B are packaged separately in 200kg iron drums and 20kg plastic drums, or other specified packaging.


8. Product Storage and Transportation

1. JY-131M products should be stored between 0℃ to 30℃, with a shelf life of 1 year under original packaging and sealed conditions.

2. Transport as non-hazardous goods.


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