In modern textile equipment, automation and intelligent control have become core trends. Whether it is a textile host, servo control unit, or sensing detection module, their circuit boards must operate stably for a long time in complex environments such as high temperature, high humidity, dust, and chemical media. This poses extremely high requirements for electronic protective materials: they not only need to be moisture-proof and corrosion-resistant, but also have multiple properties such as insulation, flame retardancy, high and low temperature resistance, and thermal conductivity and heat dissipation.
1、 Project Background
The textile workshop environment is characterized by high temperature, high humidity, oil content, and dust content. The equipment will be subject to:
Thermal expansion and contraction caused by high temperature and temperature difference cycles;
Pollution from grease, hydraulic oil, and kerosene mist;
Corrosion caused by acid-base salt spray and metal dust in the air.
Traditional coatings are prone to cracking, delamination, yellowing, or electrical performance degradation in this environment, which cannot guarantee long-term stable operation. The customer has therefore raised higher requirements – the surface of the circuit board needs to be coated with a 3mm thick transparent three proof adhesive to achieve comprehensive protection.
2、 Customer needs and challenges
The customer has the following core requirements for material performance:
Can be used in conjunction with spraying equipment to achieve stable construction.
High insulation and UL94V-0 flame retardant rating;
Fully transparent, environmentally friendly and odorless;
Moisture proof, waterproof, dustproof;
Acid, alkali, salt spray, and grease corrosion;
Resistant to high and low temperatures (-30 ℃~180 ℃);
Good thermal conductivity and resistance to thermal expansion and contraction;
3、 Recommended solution: COATING 9067 Organic Silicon Three proof Coating Adhesive
Yilian recommended Elaplus COATING 9067 silicone coating adhesive to customers.
This is a low viscosity, transparent three proof material designed specifically for electronic circuit protection, with excellent adhesion and weather resistance, suitable for various processes such as spraying, brushing, dipping, etc.
Core advantages:
Single component low viscosity system, easy to apply, suitable for automatic spraying;
High transparency, without affecting the appearance and inspection of the circuit board;
Room temperature curing or heating curing, flexible process;
Excellent moisture-proof, waterproof, and corrosion-resistant performance;
Maintain stable elasticity at -60 ℃ to 200 ℃;
Heat shock resistance, high humidity resistance, and high adhesion;
Compliant with RoHS and low halogen environmental standards.
View COATING 9067 details
4、 Actual application and verification results
In the actual spraying process, COATING 9067 achieved a uniform and dense 3mm thick coating by adjusting the viscosity and leveling time in cooperation with the spraying equipment manufacturer. After curing, the coating surface is smooth and transparent, with flexibility and good adhesion.
Through multiple environmental and performance validation tests:
Insulation withstand voltage: Passed 1KV test without breakdown;
Salt spray and wet heat cycle test (96 hours): no bubbles, no delamination;
Acid alkali and oil immersion test: no whitening or softening on the surface;
Cold and hot shock (-30 ℃ to 150 ℃ cycle): The coating has no cracks;
Flame retardant rating: UL94V-0 standard qualified.
Customer feedback: The circuit board coated with COATING 9067 maintains excellent electrical stability and mechanical reliability even in high humidity and high temperature environments for a long time, and the product maintenance rate is significantly reduced.
Yilian Electronic Adhesive is committed to providing professional adhesive protection solutions for the industrial, automotive, new energy, and consumer electronics fields.
To learn more about the coating application of COATING 9067, please contact Yilian for technical support.
Tags: conformal coating · Industrial PCB potting adhesive · Organic silicon coating adhesive · Circuit board conformal coating
