Huitian Thread Locking General Operation Instructions
Huitian Thread Locking General Operation Instructions
1 Scope
This guide applies to thread locking general operations in industrial manufacturing such as passenger cars, buses, commercial vehicles, and construction machinery. Applicable rubber types include Huitian 7242, 7243, 7262, 7271, 7272, and 7277.
2. Processing
The overall process is:
Cleaning - Gluing - Assembly - Curing
2.1 Use Huitian Cleaning Agent 7755 to clean the surface of bolts and nuts with heavy oil pollution (Huitian 7243 can be used without cleaning when used for oil-free or lightly oiled threads), remove the oil pollution and impurities in the screw holes and on the bolts, and dry them.
2.2.1 For through-hole working conditions: pass the bolt through the screw hole, select a thread locker with appropriate strength and apply it to the thread of the meshing part, assemble the nut, and tighten it to the specified torque, see Figure 1:
2.2.2 For through-hole working conditions where the screw hole depth is greater than the bolt length: select a locking glue of appropriate strength and apply it to the bolt thread, assemble and tighten to the specified torque, see Figure 2:
2.2.3 For blind hole conditions: drip the glue to the bottom of the blind hole, select the glue of appropriate strength and apply it to the thread of the bolt, assemble and tighten to the specified torque; if the blind hole opening is downward, just apply the locking glue to the thread of the bolt, and no glue is needed inside the blind hole, see Figure 3:
2.2.4 For stud bolts: drip Huitian 7262 into the screw hole, then apply Huitian 7262 on the bolt, assemble the stud and tighten it to the specified torque; after assembling other parts, apply Huitian 7243 to the meshing part of the stud and nut, assemble the nut and tighten it to the specified torque; if the blind hole opens downward, no glue is needed in the hole, see Figure 4:
2.2.6 After assembly, use a cotton swab or cotton cloth to wipe off excess glue. See Figure 5:
2.3 Notes:
2.3.1. Shake the glue bottle before applying glue to make the glue liquid uniform, and try to avoid contact between the glue nozzle and metal objects during use.
2.3.2. The glue should be applied to each thread engagement part for more than 3 to 5 turns, and the glue should fully fill the thread gap.
2.3.3. To improve on-site operation efficiency, you can pour the glue into a shallow plastic box, dip the bolts into it, and quickly apply the glue. However, after using up the glue in the plastic box, do not pour it back into the original packaging bottle.
2.3.4. Huitian 7755 cleaning agent contains organic solvents, so it is not recommended to be used to clean workpieces made of organic materials such as fiberglass, rubber, plastic, and aluminum coating.
3. What to do when it is difficult to disassemble after using glue
In general, it can be disassembled with ordinary tools. When the strength of the selected locking glue is too high and it cannot be disassembled with ordinary methods (such as wrenches and screwdrivers), the local heating method can be used to heat the threaded engagement point locally, that is, locally heat the nut or screw to 232 ° C for 5 minutes and disassemble it while it is hot.
4. Huitian thread lock adhesive performance list
Product name
Typical Uses
Color
Curing speed
Oil resistance
Remarks
Huitian
7242
Medium to low strength, easy to disassemble, suitable for fastening and sealing bolts and nuts below M20
blue
Initial solidification 5~20min,
Fully cured 24h
The curing time depends on factors such as ambient temperature and fastener material (only for carbon steel here)
Huitian
7243
Medium strength, easy to disassemble, suitable for fastening and sealing bolts and nuts below M20
blue
Initial solidification 5~20min,
Fully cured 24h
Can be used on light oil surfaces
Huitian
7262
Medium to high strength, suitable for thread locking below M20, a permanent locking thread locker with excellent rust and corrosion resistance in extreme chemical environments
red
Initial solidification 5~10min,
Fully cured 24h
Huitian
7272
High strength, excellent high temperature resistance, suitable for permanent locking and sealing of threads below M36, can prevent threads from rusting and corrosion, heating and disassembly with tools
red
Initial solidification 45~60min,
Fully cured 24h
Huitian
7277
High strength, excellent chemical resistance, suitable for permanent locking and sealing of threads below M36, can prevent threads from rusting and corrosion, heating and disassembly with tools
red
Initial solidification 15~45min,
Fully cured 24h
PV308C solar cell backsheet advantage introduction
Based on the provided technical data sheet for the PV308C solar cell backsheet, here are the key specifications and performance parameters:
Product Information:
Name: PV308C Solar Cell Backsheet
Version: May 2022
Structure:
Consists of 3 layers: air contact layer (fluorocarbon coating), middle layer (strengthening barrier PET film), and EVA contact layer (fluorocarbon coating)
Air layer (fluorocarbon coating) thickness: 20±10 μm
Substrate PET film thickness: 300±30 μm
EVA layer (fluorocarbon coating) thickness: 8±5 μm
Typical Application:
Designed for packaging crystalline silicon photovoltaic modules
Packaging:
Provided in sheets
Packaging pallet carries product name, model, batch number and batch barcode, production date, certification mark, and instructions for use
Width: 985mm (customizable)
Length: 200m/roll (3 x 3 on one pallet); 600m coiled material can also be provided
Specifications:
Outstanding bonding strength with commercially available packaging materials
Suitable for various lamination processes
Excellent physical & mechanical properties, insulation, barrier, weather resistance, and aging resistance
Service life of more than 25 years for modules
Performance Parameters:
Color: White/Black
Nominal Thickness: 328 μm
Tensile Strength (MD): ≥ 110 MPa
Tensile Strength (TD): ≥ 100 MPa
Elongation at Break (MD): ≥ 100%
Elongation at Break (TD): ≥ 90%
Heat Shrinkage Rate (MD): ≤ 1.5%
Heat Shrinkage Rate (TD): ≤ 1.0%
Peeling Strength: ≥ 4 N/cm
EVA Interlaminar Peel Strength: ≥ 60 N/cm
Coating Adhesion: Level 0 (as per GB/T 9286-1998)
System Voltage: 1500V
Optical Transmittance (400-1100 nm): ≥ 85%
DH1000H Test: No cracking, delamination, blistering, or pulverization; yellowing index △b ≤ 3
100 kWh UV Exposure (Air Side): Conforms to IEC61215-05 10.11 standards
Please note that the information provided is based on the data available in the technical data sheet provided.
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