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#Moulding Liquid Silicone Rubber Gypsum Molds Making RTV2 Rubber Silicon
Description:
Moulding Liquid Silicone Rubber Gypsum Molds Making RTV2 Rubber Silicon:
HD-7 series: is a kind of room temperature vulcanized silicone rubber in condensation type. It's generally named as two part silicone rubber , Part A is a flowable liquid, part B is the curing agent or catalyst . It's mainly used for mold making.
Used for making molds of concrete stone,GRC, gypsum decoration , plaster ornaments, fiberglass products, polyester decoration, unsaturated resin crafts, polyresin crafts, polyurethane, bronze, wax, candle, and similar products .
Characteristics
*An exceptional fluidity and good operability, easy to demold
*Moderate hardness
*High tensile and tear strength
*Good flexibility
*Cure at room temperature
*Outstanding bubble releasing
*High duplication times
#Moulding Liquid Silicone Rubber Gypsum Molds Making RTV2 Rubber Silicon
HD-7 series: a kind of two part silicone rubber in addition cure or platinum cure type with mixing ratio of 1:1 or 10:1 . It can cure at room temperature as well as under heat . It's a kind of food grade silicone and mainly used for mold making.
Mainly used for making molds of concrete stone,GRC,polyurethane products ; wax, candle decoration ; rapid prototyping and tyre molds; chocolate,candy and similar products, and used for making sex toys and make the finial product like the steeve and steal round.
Characteristics
*An exceptional fluidity and good operability, easy to demold
*Good tensile and tear strength
*Outstanding bubble releasing
*Non-deformation
*Low shrinkage
*Aging resistance ,high temperature resistance (200ºC)
*Environmentally, food-grade
Differences between the condensation and addition cure Silicone rubber rtv for soap mold:
1, The difference between addition cure silicone and condensation cure silicone.
The mixing ratio of A and B is different
The mixing ratio of condensation cure silicone is normally 100:2~100:5, some from European and USA is 10:1.
The mixing ratio of addition silicone is normally 1:1, 10:1, 9:1
2, Addition cure silicone is odorless, environmental friendly, and food grade. So the raw material of addition cure silicone is more expensive than that of condensation cure silicone, so does the price.
3, Addition silicone has a wider range of applications, such as used for food, life casting, tire mold casting and so on.
4, The shrinkage of condensation cure silicone is low, about 0.3%; While addition cure silicone is with lower shrinkage, about 0.1%.
5. Addition cure silicone can be transparent, even high transparent, of course the price is more expensive.
However, condensation cure silicone can be white or other colors too, but no transparent.
6, Temperature resistance is different, addition cure silicone is better than condensation cure silicone in this performance.
Condensation cure silicone: 100-150C
Addition cure silicone: 150-220C
Parameter datesheet:
#Moulding Liquid Silicone Rubber Gypsum Molds Making RTV2 Rubber Silicon
Operation:
(1) prepare the original molds:
Make sure your original molds perfect. fix it on a board. And fix the original mold on a board, then used four piece of board to enclose the original molds.
(2) Weight part A & part B according to the mix ratio recommended:
Weighting two parts in Electronic scale with mix ratio 100:2 or 100:5.
Eg: Take 100g part A and 2g part B
(3) Stirring evenly
Remember to mix part A and part B evenly, otherwise the silicon rubber will be partly solidified and bring problems in your final operation. What's more, the finished molds will meet a short life.All of these will cause a waste of silicon rubber.
(4)Vacuum pumping
For releasing the air bubbles, after mixing evenly, put the mixture in to vacuum pumping for 3-5 minutes, without exception, this step takes less than 10 minutes. Otherwise, it will cause cross linking reaction, and no more further steps will be available.
(5) Pouring or Brushing
Pouring:Pouring the silicone rubber to the frame from a corner, make the silicone rubber flow to the frame smooth.After 3-5 hours later, can demould the silicone mold,
It's will be better for mold to demould after 24 hours
Brushing:
A: Evenly brush the first layer of mixed silicon rubber on the model. Normally the first layer is brushed thinly to cover the model and the clay, so it should not be too thick
B: Brush the second layer of silicon rubber till the first one is cured. Normally the second layer should be 3-5mm, Cover a gauze or cloth on it when the second cross linking reaction goes on, and use a brush pen or a brush to avoid any interstices. Evenly brush the third layer of mixed silicon rubber on the gauze or cloth. This step will longer the mold using age, tear-strength, tension strength and duplication times.
C: Outer molding
Way 1: Make a square frame with four pieces of wooden boards, and make sure the wooden boards are fixed firmly, then pour the mixed liquid plaster into the frame. Shave the plaster-made outer mold with a scraper when the plaster is going to cured.
Way 2: brushing resin on the surface after silicone mold, Cover a gauze or cloth on it, then brushing the resin again. Repeat the operation for 2-3 times
Package:
#Moulding Liquid Silicone Rubber Gypsum Molds Making RTV2 Rubber Silicon
1kg/drum;5kg/drum;
20kg/drum;25kg/drum;
200kg/drum.
1.How can you prove that you are a paint manufacturer rather than a trading company?
As the one of The Leading manufacturer of liquid silcione in China.
We have many years of experience since 1996 in production and export,welcome to visit our factory at any time.
2.How about the price ?
We can offer the best wholesale price which depend on the quantity of the order.
3.I need to make sure the quality .
Our pleasure! After our confirmation, We can offer the liquid Free sample for you to test.
4.What's your MOQ (min order quantity),production period and delivery time?
Our MOQ is 200Kg. We accept mixed order and the production period and delivery time are 3-7 days.
5, How to choose suitable hardness silicone for your product?
- For products (within 20cm),
with intricate designs, soft silicone is suitable, such as 10-20 shore A.
- For products (20cm-80cm),
with intricate designs, 20-25 shore A is suitable.
with simple designs, 25-30 shore A is suitable.
- For products (80cm-150cm),
with intricate designs, 25 shore A is suitable.
with simple designs, 30-35 shore A is suitable.
- For products (more than 150cm),
with intricate designs, 25-28 shore a A is suitable.
with simple designs, 35-40 shore A is suitable.
FAQ
FAQ
1. Are you factory or trading company ? can you send sample to us and how long could it take?
Yes, we are factory, We could provide free samples for our regular items in 2 working days,clients only need to pay the FedEx shipping cost.
2. Can we have them with different performance or our own design?
Yes! we can make different silicone performance and OEM packing design as per customer request.
- What is your MOQ ?
Generally should be 1000kgs, but we accept small order as trial order
4. Can I print your logo on the carton box?
Sure, welcome to send your logo for us reference.
5. How many colors are available?
The regular color is white or transparent or translucent. We can do custom colors as your special request. So give us your Pantone color is available.
6. Do you offer customized packaging ?
Yes! all of our products can be packed as your special request.
7. Any discount ?
Yes! we could offer discount upon your order quantities.
Contact:
If you need any further information about the HTV solid silicone rubber, Please do your free to contact Jason:
Dongguan Huadai Silicone Co.,Ltd
Jason Yang
Sales Manager
welcome to call: one three six two seven nine two one eight nine one
Audited Supplier 
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