The company always adheres to the business philosophy that integrity is capital, quality is life, and innovation is driving force, leading the development of the Copper or Aluminum Heatsink, Bonded Heat Sink, Vacuum Brazing Liquid Cooling Heatsink industry. Our company adopts a quality management system to effectively improve the management level, reduce losses, improve economic benefits and become your right-hand assistant. 'Treat customers, treat employees' is our company's business philosophy, to create value for consumers is our highest pursuit. We believe that in order to maintain the brand's reputation, it is necessary to keep the growth mode thoughtful and cautious. We constantly strengthen the work of technological innovation to improve the competitiveness of the enterprise market.
Epoxy:
70-3812NC is a two component, aluminum filled epoxy system. This system is used for making heat resistant tools, parts, or bonds that require the highest thermal conductivity and heat resistance. We have developed this extremely conductive epoxy by formulating it with a unique combination of fillers, particle sizes and dispersion techniques.
70-3812NC has good heat dissipation making this a popular choice for a variety of heat sink applications. Its viscosity is particularly suited for Fin bonding
Features:
• Excellent Thermal Conductivity
• Superior Adhesion
• Low Viscosity allows quick self leveling
Typical Specifications:
Color: Grey
Viscosity, 25ºC,
Resin: 130,000
Mixed: 8,000
Specific Gravity, 25ºC: 1.81
Working time, 100 grams, 25ºC: 5 Hours
Durometer, Shore D
25ºC: 90
100ºC: 65
Tensile Strength, PSI, 25ºC: 9,000
Aluminum to Aluminum
1" overlap: 1,680
Compressive Strength, PSI, 25ºC: 18,500
Mix Ratio, by weight: 100:10
Operating temperature, ºC: -55 to 155
Coefficent of Thermal Expansion, ºC: 28 x 10-6
Thermal Conductivity, w/m ºC: 4.5
Mixing Instructions:
1) By weight thoroughly mix 100 parts 70-3812RNC epoxy with 10 parts 70-3812C.
2) Cure according to one of the following schedules:
25ºC: 24 Hours
65ºC: 45 Minutes
125ºC: 15-20 Minutes
To reduce the viscosity of the resin and help with air release, warm the resin to moderate temperatures (80-100ºF) before adding the curing agent. Some settling is common during storage and transit. Premix resin thoroughly before adding curing agent.
Epoxy bonding in liquid cold plate
Because epoxy has excellent thermal conductivity, excellent adhesion, and low viscosity allowing rapid self-leveling, we use it in copper pipe water-cooling plates.
Epoxy bonding


Epoxy using in liquid cold plate process:
Apply 70-3812 high thermal epoxy, measure the weight: after applying - before applying=0.2 +/-1g

Apply Epoxy again for better bonding result, measure by weight: after applied- before applied=1~3g fill up all cavities formed after stamping.

Auto dispenser to apply Epoxy

Fill up all cavities formed after stamping
With high-quality Full Automatic Distillation Apparatus-Petroleum Distillation Apparatus-Oil Distillation Apparatus, reasonable prices and good after-sales service, we have won the praise of many friends. We are always supplying large quantities of stock, trying to create unlimited convenience and save customers' operating costs. Our company will continue to maintain and carry forward the fine tradition of enterprise.
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