The successful application of ThreeBond 1401B (CV) screw anti-loosening sealant in communication equipment and precision electronics

Industry field: Electrical communication equipment / precision electronics / intelligent electronic control terminal

Application parts: chassis structural parts, PCB fasteners and various precision micro screws

Products used: Three-bond synthetic resin solvent volatile type screw loosening inhibitor ThreeBond 1401B (CV) (environmentally friendly VOC improved type)

1. Customer pain points and project background

When a well-known communications and intelligent hardware manufacturer produces outdoor base station controllers and precision distribution boxes, the bolt fastening link has long faced two severe challenges:

1. VOC environmental compliance review pressure:

   With the strict implementation of domestic VOC (volatile organic compound) emission regulations for adhesives, the traditional fastening adhesives originally used by customers are facing compliance risks of exceeding the standard during random inspections and production line rectification. There is an urgent need for a high-performance alternative that complies with China's latest VOC regulations。

2. Vibration looseness and after-sales maintenance dilemma:

   There is continuous micro-vibration in the fans, relays and other components inside the equipment, and long-distance bumpy transportation can easily cause small screws to loosen and fall off; If high-strength anaerobic adhesive is used, it is easy to slip, damage the threads and even scrap the shell during after-sales maintenance. Customers urgently need aAn anti-loosening solution with excellent anti-vibration elasticity and suitable for frequent disassembly.

2. Solution: Unique advantages of ThreeBond 1401B(CV)

In view of the multiple considerations of customers in terms of compliance, vibration resistance and maintenance, we recommend the improved grade specially launched by Three Bonds for the Chinese market ThreeBond 1401B(CV)：

• Compliance and environmental protection: The synthetic resin system is specially improved to cope with China's VOC regulations, ensuring the environmental protection and safety of the production line, and easily passing environmental assessment acceptance and large factory inspections。

• Elastic film, buffering and anti-vibration: After curing, a high-toughness elastic film is formed, which not only has good vibration and impact resistance, but also simultaneously isolates water vapor and air, preventing screw corrosion and gap leakage。

• Mild breaking torque, easy to disassemble: Unlike the irreversible locking of anaerobic adhesives, the TB1401B (CV) design is optimized for small screws. After complete curing, the disassembly feels moderate and does not damage the threads, greatly reducing after-sales maintenance costs。

• Excellent permeability: Moderate viscosity (approximately 270 mPa·s), it can be pre-coated or directly applied along the gaps after the screws are pre-tightened, significantly improving the flexibility of production line assembly。

• Blue/blue-green visual management: After coating, the adhesive layer will appear bright blue ~ blue-green, and the production line quality inspection personnel can visually confirm the dispensing position and saturation, eliminating missed injections and missed inspections。

3. Measured key technical parameters and performance

According to ThreeKey official testing standards and customer engineering test data:

1. Curing speed curve (M10 bolt, 25℃ normal temperature)

• Day 1: Fixing force 1.3 N·m, initial shaping；

• Day 2: The fixation force quickly increased to 5.2 N·m；

• Day 3: reaches 8.8 N·m, vibration resistance is basically established；

• Day 7: Fully cured, breaking torque stabilized at 11.0 N·m peak value.

2. Comparison of tightening force of screws of various specifications (25℃ × 7 days curing)

• M3：0.3 N·m(miniature electronic screws for effortless removal)

• M4：1.0 N·m

• M6：3.4 N·m

• M8：7.3 N·m

• M10：11.0 N·m

4. On-site standard gluing operation instructions (SOP)

In order to ensure the best bonding, sealing and anti-vibration effects, it is recommended that customer production lines follow the following standardized process:

1. Clean the surface: Use cleaning agent to completely remove oil, water vapor and dust and dirt on the surface of the screws and screw holes。

2. Shake well: Be sure to shake the can fully before opening the lid to ensure that the synthetic resin ingredients are evenly distributed

3. Apply an appropriate amount: Use a brush, dispensing syringe or straw to apply to the root of the screw or the bite thread; for the screw that has been tightened, drop it on the joint between the nut and the base and penetrate it through capillary action

4. Tighten the torque and wipe the spillage: Use a fixed-torque screwdriver to tighten to the standard torque, and wipe the glue spilled outside the screw with a clean cloth.

5. Leave to cure: Avoid shaking or disassembling screws before complete curing. After the solvent has completely evaporated and formed a film, you can enter the subsequent packaging test process.

5. Customer benefits and application results

• Green compliance, no fear of review: Smooth replacement of the old version of high VOC brands, fully compliant with national environmental protection regulations, ensuring customers have no worries about exports and domestic factory inspections。

• Quality inspection is intuitive, and repair efficiency is improved by 40%: The eye-catching blue logo clears the blind spots of quality inspection; After-sales teams no longer have nuts sticking or screws breaking when dismantling micro-accessories, and the overall assembly yield rate has increased to more than 99.8%.

If you need to obtain the original technical data (TDS), safety data sheet (SDS) or apply for samples of ThreeBond 1401B (CV), please contact our technical support team.