제품 개요
LOCTITE 4311 is a one-component, dual-cure cyanoacrylate adhesive engineered to deliver extremely fast fixturing via light exposure, followed by secondary cure via ambient moisture. It provides outstanding bond strength on a broad range of substrates including plastics, metals, paper and ceramics, even where opaque or rigid materials are used. The product’s UV/fluorescent formulation enables quality-inspection under ultraviolet light for high-volume manufacturing applications.
주요 특징 및 장점
-
Dual-cure mechanism (light + humidity) ensures fast tack-free surface cure and reliable full cure depth.
-
Medium viscosity enables filling of gaps up to ~0.2 mm while maintaining controlled flow.
-
UV-fluorescent under inspection light — ideal for traceability and automated quality-control in production.
-
Biocompatible (ISO-10993 tested) — suitable for medical device assembly or other regulated manufacturing environments.
-
Bonds rigid, opaque, or difficult substrates like metals, ceramics, plastics and composites.
애플리케이션
-
표면 준비: Ensure bonding surfaces are clean, dry and free of oils, dust or release agents. Rigid substrates (metals, ceramics) may benefit from light abrasion and cleaning.
-
애플리케이션: Apply LOCTITE 4311 to one mating surface. Aim for thin bonding layer—over-application may hamper light penetration or create uneven cure.
-
조립 및 정렬: Position the parts; since this is a rapid-fixture adhesive, alignment must be correct on first contact.
-
Light Cure: Expose bond area to suitable UV/visible-light source per manufacturer recommendations to achieve tack-free fixture.
-
Moisture Cure (if applicable): After light exposure, full cure in confined areas is achieved via ambient moisture. Ensure parts are not sealed in absence of air/oxygen if gap fill is significant.
-
Handling & Load-up: After initial fixture, allow recommended time for full strength before applying service loads (see TDS).
-
분해/수리: Designed for permanent bonds—if disassembly is required, consult TDS for recommended methods (e.g., mechanical removal, heat).
팁:
-
For thick or opaque substrates, ensure sufficient light intensity/penetration for full cure.
-
Use minimal adhesive for best control and lower waste.
-
Verify light-curing equipment is correctly calibrated for the adhesive’s wavelengths and intensity.
자주 묻는 질문
Q1: Does LOCTITE 4311 require a primer for plastics?
A1: Not typically for many engineered plastics, metals or ceramics—but for low-surface-energy plastics (e.g., PP, PE, PTFE) a primer may be needed; consult the TDS for substrate recommendations.
Q2: How fast does it fixture?
A2: It achieves tack-free surface cure in seconds when appropriate UV/visible light exposure is applied. Specific fixture times vary by substrate, gap, and light intensity.
Q3: Is it suitable for use with medical devices?
A3: Yes — LOCTITE 4311 is ISO-10993 tested for biocompatibility, making it suitable for many medical device assembly processes.
Q4: What is the maximum gap size?
A4: Approximately 0.2 mm is recommended for optimal performance; larger gaps may reduce cure speed or bond strength.
Q5: What if I cannot apply light to the bond area?
A5: Because this is a dual-cure adhesive, if light access is limited the moisture-cure phase completes the bond—but expect longer cure time in the absence of light. For fully opaque assemblies, consider alternative adhesive systems.
