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Silicone Foam Sheet | Open or Closed Cell Foam Sheeting

Place of Origin:china
Brand Name:JE
Certification:FDA, LFGB, UL, ROSH, SGS
Model Number:JE-1255
Minimum Order Quantity:50kg
Price:Negotiation
Packaging Details:1kg/can or as your request
Delivery Time:3-5 work days
Payment Terms:L/C, T/T, Western Union, MoneyGram
Supply Ability:5000 Ton/Tons per Year

Product Details

Definition of silicone foam 

Silicone foam sheet is mainly used to make silicone foam sealing strips, silicone foam sheets, silicone foam sheets, silicone foam rolls, printer shaft sponge tube, silicone foam insulation tube, etc.

The Open or Closed Cell Foam Sheeting are mainly used as shock absorbing accessories, also can be used for bagging and other products. The foaming rate of silicone foam is 1~3.5 times, and the density is 0.5-0.9g/cm3 after foaming; it has excellent anti-vibration and sound insulation properties and becomes a soft elastomer material after vulcanization. It is soft and light, with a good hand feeling and a high multiplier of foaming.
The silicone foam board material is made into various sheets with high tear resistance, high-temperature resistance, corrosion resistance, aging resistance, non-toxic, tasteless, and good elasticity.


Principle of rubber foaming

The principle of producing rubber sponges by solid rubber foaming is to add the foaming agent to the selected rubber material or then add a co-foaming agent. At the vulcanization temperature, the foaming agent decomposes and releases gas, which is surrounded by the rubber material to form bubble holes to make the rubber material expand to form a sponge.
The main factors that determine and influence the structure of the bubble pore are the amount of blowing agent, the diffusion rate of gas in the rubber, the viscosity of the rubber, and the speed of vulcanization.
 To make better rubber products, the choice of blowing agent species and rubber vulcanization system is the key. There are two specific methods.

  First, according to the vulcanization temperature to choose the decomposition temperature with the appropriate blowing agent, and then according to the speed of decomposition of the blowing agent in the vulcanization temperature to adjust the speed of rubber vulcanization.

  Secondly, in the case of the vulcanization system is determined, according to the speed of vulcanization to choose the variety of blowing agents and the appropriate particle size. The particle size of the blowing agent is also one of the most important factors in determining the decomposition speed of the blowing agent. The particle size decreases, the specific surface area of particles increases, the heat transfer efficiency increases and the decomposition speed is accelerated, so the balance between the decomposition speed of the blowing agent and the vulcanization speed of the rubber can be adjusted by choosing a suitable particle size of the blowing agent.


Definition of open-cell foam and closed-cell foam

Open-hole material is called sponge in general, such as PU foam, the pores are connected, air can pass through, which is called open-hole.
Closed-hole foam: observe its side section, there are many holes, squeeze by hand, the material inside the closed-hole will be squeezed like a balloon bubble, you can hear the bubble popping exploded

Open-pore foam: the internal pore and pore and the pore are connected, for non-independent pore structure. Open-cell foam silicone features: silicone products feel soft and delicate;
Closed-cell foam: the internal pores and pores are separated by a wall film, not connected, for independent pore structure. Closed-cell foam silicone is characterized by good resilience and pressure change.

open&closed silicone foam sheet compare
The advantages of closed-cell silicone sheet

  1.  UV resistance, ozone resistance, extreme temperature resistance, and flame retardancy
  2.  Strong sealing ability, can effectively stop tiny particles and drifting rain.
  3.  Sealing, dustproof, moisture-proof, airtight and light-shielding, vibration isolation, fireproof
  4.  used in electronic equipment and vehicle interior vibration isolation
  5.  Cushioning pads and gaskets
Foamed silicone sheet has been more and more widely used because of the excellent performance of silicone rubber and foam materials. It not only has the high resilience and anti-aging properties of rubber but also has the properties of sound absorption and vibration damping for waterproof, vibration damping, sound insulation, heat insulation, and aviation thermal insulation.

Foamed silicone sheet has better shockproof cushioning, sound insulation, heat insulation, and heat preservation time as well as a flame retardant and explosion-proof properties. With the promotion and application of foamed silica gel material and the improvement of people's awareness of it in society, the future foamed silica gel material is expected to replace the traditional polyurethane type foaming material.

What are the basic characteristics of foamed silicone?
Foamed silicone is a special polyurethane product filled with polyurethane prepolymer, blowing agent, catalyst and other components in a pressure-resistant aerosol can. When the material is ejected from the aerosol can, the cured silicone foam has various effects such as caulking, bonding, sealing, heat insulation, and sound absorption.
The chemical structure of foamed silica gel is stable, has a long service life, does not constitute pollution to the surrounding living environment, is self-extinguishing away from the open fire, and only charring without dripping when burning, the size and shape of the charred layer design remain unchanged, can effectively use the entry of isolated air to stop the spread of fire, and the fire prevention system has good safe working performance. Insulation technology performance is more excellent, foam silica gel continuous dense skin and nearly 100% of the high strength interconnection wall closed pore, with the ideal impermeability.


Silicone foam sheet main purpose

Silicone foam sheet also has excellent fire resistance and high and low-temperature performance, molding and extrusion are widely used in the production of flame retardant and fireproof silicone foam products. It is widely used in the production of fire retardant and fireproof silicone foam products, such as new energy automobile fireproof and shockproof sound insulation materials, packaging fireproof and shockproof materials, fireproof silicone foam board, various wire and cable sheathing, rubber hose, fireproof silicone foam belt, and various extruded or calendered fireproof and fireproof silicone foam products.

Silicone foam sheet Performance

Product Name
Foam Silicone Rubber Sheet
Elongation ( % )
250-450
Tensile Strength (Mpa)
5-8
Denisty(g/cm3)
0.5-1.4
Hardness(Shore A)
5-50
Temperature resistance range
-40-280 ° C
Thickness
3-50mm
Tear strength
55Kn / m
Pressure strength
30Mpa
Ductility
100%
Fire rating
94V-0
Dielectric performance (withstand voltage)
> 3KV
Color
Clear, white, red, yellow, blue, green, black,other colors can be customized
Length
Within 1200mm (inclusive) or according to customer demand
Width
within 1000mm (inclusive) or according to customer demand
Feature
Excellent oil and fats resistance and for high temperature up to 260° C

Application industry

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