Applications of RTV silicon rubber for molding:
Mold silicone rubber is mainly used for mold making for the mass production of parts in various materials (plaster, wax, reconstituded stone, various resins (epoxy, acrylic, polyester), silicone elastomer, such as:
Ø Furnishing :Casting of furniture and decoration
Ø Figurines :Toys, candles, statues, giftware, soap, craft projects, sculpture
Ø Decorative items :Cornices, columns, ornaments, statues......
Ø Construction:Prefabrication of decorative features, pavement, paving stone, urban furniture, concrete casting.
Description of RTV silicon rubber for molding:
It is a tin based mould making silicone rubber that cures at room temperature to form a tough flexible rubber with excellent tensile and tear strength approximately about 24 hours.
FEATURES
Ø Good operability and fluidity.
Ø Excellent tear strength and tensile strength.
Ø Excellent flexibility and it`s easy to removal of bubble.
Ø High temperature resistance.
Ø High duplication times and repeated use.
Ø Can be made thixotropic agent for vertical surface brushing replication.
Ø Low shrinkage rate
Data of silicone rubber for mould making
| Model | 630 |
Liquid | Appearance | White/
Translucent |
| Viscosity(Mpas) | 25000±2000 |
| Density(g/cm³) | 3.8 |
Curing
Process | Mixing ratio(%) | 2-4 |
| Operation time(mins) | 30-50 |
| Curing time(hrs) | 2-6 |
| Shrinkage rate(%) | <=0.3 |
After
Curing | Hardness(shore A°) | 30±2 |
| Tensile strength(MPa) | 4.0 |
| Tearing strength(KN/M) | 27±2 |
| Elongation(%) | 440 |
Notice :Hardness and viscosity are adjustable according to customers' requirements.
HOW TO USE SILICONE
Applying release agent
To ensure easy demould, lightly brush a coat of release agent with soft brush over all the surface of original mold.And let the release agent dry for 30 minutes.
Mixing the two components
Ø It`s advised to remix based silicone rubber and shake curing agent before mixing them together.
Ø Take 100 parts of silicone bass and 3, 4 or 5 parts of curing agent by weight accurately.
Ø Mix two components thoroughly 3 minutes by electrical by mixer and make sure that you scrape the sides and bottom of drum.
Vacuum Degassing
After mixing silicone base and curing agent, vacuum degassing is recommended to eliminate any entrapped air.Vacuum material will be for 2-3 minutes.The bubble will disappear gradually.
Pouring mixture
For the best results, please pour the mixture components at the lowest point of the drum on a uniform flow to minimize entrapped air.Note that silicone rubber level should level at lease 1.3cm over the highest point of original mold surface.
Crossing linking and curing
The best curing conditions is at room temperature of 25`C and humidity of 50%.The use of silicone at higher temperature will reduce the pot life and curing time.On the contrary, the use of silicone on at lower temperature will increase the pot life and mix ratio.
Allow the mould cure at least 24 hours at room temperature before demoulding.Do not cure silicone rubber mould below 20`C.In order to achieve the best possible performance levels from the moulds, it is performance to use them after 24 hours.
For more information , pls feel free to contact Ms Celina
Mob:086-18397212139
Welcome to our website:3W(DOT)gcsilicon (DOT)COM
Shenzhen Guicheng Silicone Co., Ltd is a newly emerging trade company with its own factory which is specialized in production, R & D, and sales of silicone rubber. Its predecessor is Shenzhen Xuelai Silicone Technology Co., Ltd, which was established in 2010. Products are exported to more than 60 countries around the world.
Our products can be classified into two categories from the principle of vulcanizing, that is, room temperature vulcanized silicone rubber (RTV-2) and high temperature vulcanized silicone rubber (HTV).
From the application, it can be sorted into hundreds of kinds of silicone products like RTV-2 molding silicone rubber, liquid molding silicone rubber, silicone rubber for life casting, food grade mold silicone, pad printing silicone rubber, Manual molding silicon, Addition cure silicone rubber, Electronic potting silicone, Silicone rubber for life casting, Silicone rubber for textile coating, Silicon for shoes soles mold making, 60-70 A° Silicon rubber sheet, silicone rubber thixotropic agent, hot stamping silicone rubber, Silicone oil, textile softening agent, textile smoothing agent, etc.
We have varieties of products and wide production range, which can reach all customers' needs. Our products are with good raw material and good performance. We are sure that we will bring you first class products.
