Recently, a thermal conductive silicone pad cooling solution was provided to a customer who made a motor. Because the product is too thin, the thickness is only 0.5mm, and the thermal conductivity is high, which makes the product toughness and poor tensile strength. The thermally conductive silicone pad is applied to the motor, and it is in a continuous vibration environment, so there are certain requirements for the tensile resistance and wear resistance of the product. The sample showed multiple cracks and wear during the test, and the customer had concerns about the thermal pads.
In response to this situation, we explained to the customer that there is no problem with the thermal conductive gasket itself, and the problem is not difficult to solve, that is, adding glass fiber cloth to the original thermal silicone pads, adding a layer of glass fiber reinforcement to the thermal silicone pads. Yes; from the point of view of thermal conductivity, we recommend glass fiber with a thickness of 0.03mm, the tensile strength is not less than 100psi, and the tensile strength is enhanced while ensuring thermal conductivity to the greatest extent. But the thermal conductivity can not be reduced by adding glass fiber, it can be done for us, but the cost is slightly increased. We quickly produced samples and did a tensile strength test. The tensile strength was 112psi, which fully met the customer’s application requirements.
The thermal silicone pads with glass fiber is because the thinner the thermal silicone pads, the worse the tensile resistance and the lower the voltage resistance performance. In addition, the thermal silicone pad is too thin, and it will be very poor during use due to its poor tensile resistance. It is prone to tearing. Therefore, generally thinner thermal silicone pads will use glass fibers to enhance the tensile strength and voltage resistance of the product.
So the question is, what is a thermal silicone pads with glass fiber? What are the functional characteristics of the thermal pad with glass fiber? Let’s find out together!
The thermal pads with glass fiber is based on glass fiber cloth and silica gel, and contains a compound of silicone resin, boron nitride and glass fiber. After the use of glass fiber, the product has good toughness and strength, and enhances the high shear strength, puncture and tear resistance products. And it does not affect the multi-style thermal properties of the thermally conductive material itself, and is widely suitable for the application of any electronic and electrical equipment. The most widely used thermal conductive material industry is glass fiber cloth.
Advantages of thermal silicone pad with glass fiber
Increase the toughness of the thermal silicone pad
Ordinary thermal silicone pads do not have any reinforcing materials added. They are all ceramic alumina powders. Ordinary thermal silicone pads are soft in texture. If you do not pay attention during operation, they will be easily damaged. After the fiberglass reinforcement, there will be no damage.
Easy construction and strong operability
The glass fiber reinforcement material can supplement the disadvantages of easy deformation after the thermal conductive powder is filled. With this layer of glass fiber base material, the material will not be deformed basically, and the production line staff will be faster and more convenient when installing, and it can be operated. Strong sex.
Better control of length and width tolerances
Engineering can use this to control the assembly size very accurately, that is, the length and width tolerances can be well controlled within the required range, so that there will be no deformation of the thermal silicone pads during use, and the size will increase, resulting in thermal pads The film does not fit into the original design structure.
Wear-resistant and tear-resistant
The glass fiber reinforced material increases the wear resistance of the silicone thermal pads. For example, some design structures have screws or structural parts on the surface that require a pulling action. At this time, if ordinary silicone thermal pads are used, it is easy to cause damage during the pulling Damaged, and adding a layer of glass fiber substrate silicone sheet can solve this problem very well.
There are advantages and disadvantages. Although the silicone thermal pads with glass fiber has certain advantages in application, it also has disadvantages that cannot be ignored!
Disadvantages of thermal pad with glass fiber
increase thermal resistance
Compared with the ordinary thermal pads made of the same powder, the thermal conductivity of the thermal pads with glass fiber base material will be lower, and the thermal resistance of the thermal pads with glass fiber base material itself will increase, resulting in a year-on-year thermal conductivity effect. lower.
Unable to fully absorb uneven gaps
If it is a thermal pad with a glass fiber base material, the effect of bonding with the side in contact with the radiator or heat source will not be as ideal as that of an ordinary thermal pad, and only the tighter the bonding, the better the thermal conductivity. Well, the uneven gap cannot be fully absorbed, and the heat conduction effect will be poor.
Complex production and processing technology
The production process of the thermal pads with glass fiber base material is relatively complicated, and the operation is more difficult, because a layer of glass fiber cloth needs to be added. It is tight and seamless, and will not be peeled off during long-term use. During processing, the glass fiber cloth will also increase certain working hours, difficulty and loss.
Relatively high cost
The cost of the thermal pads with glass fiber substrate is higher than that of the ordinary thermal pads, mainly because the glass fiber cloth itself requires additional cost and the production process and processing are complicated. For customers, the increased cost itself is a disadvantage, but in general, the pros outweigh the cons.
Sometimes we always receive some special requirements from customers in the process of supplying products. While ensuring thermal conductivity, we also require adding reinforcing materials, whether it is glass fiber, single-sided adhesive, double-sided adhesive, aluminum foil. , copper foil, single-sided PI film, graphene, etc., are all to provide customers with a more convenient product experience, better product quality and ultimately meet customer application requirements, this is not also a professional thermal conductive material manufacturer. Does it really need to be done?