200 - 40,000 kilogram
40,001 - 999,999 kilogram
group nameRTV-2 silicone rubber for molds making
Min Order200 kilogram
brand nameHong Ye silicone rubber
model638#728#788# silicon rubber
payment methodT/T, L/C, Westem Union
update timeTue, 05 Nov 2013 13:24:17 GMT
red white
green yellow
Min Order200 kilogram
silicone casting rubber specifications:
1. non deformation
2. low shrinkage
3. high tear strength
4.favorable hardness
silicone casting rubber applications
silicone casting rubber
is primarily intended for poly resin crafts, PU crafts, PU resin crafts ,gypsum crafts ,unsaturated resin crafts, lighting and candles crafts ,plastic toy , stationery gifts crafts industry, a large statue Buddha, furniture, furniture decorative materials, statues Buddha, artifacts copied, building decoration materials, largescale cement mold, artificial fossils Factory, Europe component factory,
simulation landscapes, animals and plants sculpture, sandstone crafts and so on.
silicone casting rubber description
silicone casting rubber is white or red flowing liquid with general hardness of 22-50 shore A after curing. tin cured RTV silicone rubber is a kind elastic silicon rubber mold which features with resistance to deformation, high-temperature, acid-alkali and expansion as well as high reproduction times, good tensile strength, tear strength and elongation.
FAQ. Why the silicone casting rubber just can be reproduced for a few times?
It can be due to the following reasons:
a. Adding too much silicone oil in to silicon rubber. Silicon oil is an additive which destroies the molecular weight of silicone rubber and reduce the tension and tear strength.
b. Using the silicon rubber with a high hardness to make molds for small sized products with delicate and intricate designs and the silicon rubber with a low hardness to makes molds for large sized products with simple designs.
(Notes: we should choose the silicon rubber specifically according to the requirements of our products to avoid this problem.)
Datesheet of silicone casting rubber .
Property | 625# | 630# |
Hardness (Shore A) | 25 | 30 |
Tensile strength, MPa | 3.1 | 3.6 |
Elongation @ break, % | 580 | 550 |
Tear Strength (N/mm) | 25 | 32.6 |
Linear shrinkage (%) | 0.3 | 0.3 |
Viscosity | 19000-22000 | 23000-25000 |
Color | Off White | Off White |
Mixing ration | 100:5 | 100:5 |
Pot life | 40 minutes | 30 minutes |
Cure time | 4-5 hours | 4-5 hours |
The proportions and reactions of the curing agent and the silicon as follows
a. Adding curing agent 1%, The silicone casting rubber can still be operated within 2.5 hours and can be demoulded after 6-8 hours.
b. Adding curing agent 2%, Thesilicone casting rubber can still be operated within 50 minutes to 1 hour and can be demoulded after 2-3 hours.
c. Adding curing agent 3%, The silicone casting rubber can still be operated within 28 - 30 minutes and can be demoulded after 1.5-2 hours.
d. Adding curing agent 4%, The silicone casting rubbercan still be operated within 10 - 15 minutes and can be demoulded after 1 -1.5 hours
If you have any questions with RTV-2 silicone for molding cement , pls feel free to contact Ms Angel Yue
MSN: angelfly369(at)msn(dot)cn
Skype:angelfly369
Email:hysa(at)szrl(dot)net
Tel:0086-755-89948006
Mob: 086-18938867575
Trademanager:cn200039753
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