Loctite EA M 31cl

Loctite EA M-31CL

Fixture time:160.0 min.
Hardener: Color:Clear
Hardener: Viscosity, Brookfield – RVT, @ 25.0 °C:1500.0 mPa·s (cP) – 9000.0 mPa·s (cP)
Perbandingan campuran, mengikut isipadu: 2 : 1
Mixed: Color:Ultra clear
Mixed: Specific gravity, @ 25.0 °C:1.07
Resin: Color:Clear
Resin: Viscosity, Brookfield – RVT, @ 25.0 °C:9000.0 mPa·s (cP) – 12000.0 mPa·s (cP)
Shear strength:21.4 N/mm²
Work life:30.0 min.

Keseluruhan

Loctite EA M-31CL adalah two-part, clear epoxy adhesive direka untuk high-performance bonding of plastics, metals and glass, especially in medical devices and optically clear assemblies. Selepas dicampur, ia mengeras pada suhu bilik untuk membentuk rigid, transparent bond line with excellent adhesion and chemical resistance.

Typical positioning:

  • Teknologi: 2-part epoxy structural adhesive

  • Appearance (mixed): Clear to slightly amber

  • Perbandingan campuran: 2:1 mengikut isipadu (resin : pengeras)

  • Viskositi: Low to medium – suitable for flowing into tight gaps and small cavities

  • Penyembuhan: Room-temperature cure; heat can be used to accelerate

  • Use: Adhesive for medical device assembly and demanding multi-substrate bonding

It is commonly specified where you need clarity, strong bonds and reliable performance under sterilization and cleaning regimes (subject to validation in the final device).

Ciri-ciri Utama & Manfaat

  • Clear, cosmetic bond line

    • Penyembuhan untuk a transparent joint, sesuai untuk sight windows, housings, sensors and optical components where appearance and visibility are important.

  • Medical-grade formulation

    • Part of Henkel’s medical epoxy range, sesuai untuk disposable and diagnostic device assembly when properly qualified in the end-use design.

  • High bond strength on many substrates

    • menyediakan strong lap shear and tensile strength pada metals, glass and engineering plastics, supporting structural or semi-structural joints in compact devices.

  • Low-viscosity wet-out

    • Flows into narrow bond gaps, capillaries and small cavities, making it well suited for small components, sensors and potting of delicate parts.

  • Pengerasan pada suhu bilik

    • No oven required: cures after mixing at ambient temperature, simplifying assembly of heat-sensitive plastics and electronic components.

  • Ketahanan terhadap bahan kimia dan pelarut

    • Once fully cured, offers good resistance to many cleaning agents and process fluids, helping maintain bond integrity over the life of the device.

  • Penebat elektrik

    • Epoksi yang telah diawet adalah penebat elektrik, useful around PCBs, connectors and sensing electronics.

Aplikasi Tipikal

Loctite EA M-31CL is widely used in:

  • Medical devices & diagnostics

    • Pengikatan clear housings, fluid paths and covers

    • Menyertai plastic to plastic, plastic to metal, or glass to plastic in diagnostic cartridges, sensors and small devices

    • Encapsulating or staking small electronic components inside medical instruments

  • Optical and sensor assemblies

    • Pengikatan lenses, light guides, transparent windows and sensor caps where clarity and alignment must be maintained

    • Small potting tasks where operators need to see into the encapsulated area

  • Elektronik dan instrumentasi

    • Pengikatan connectors, housings and structural inserts on or near PCBs

    • Providing insulating, protective bonds in compact instruments and controllers

  • Perekat industri umum

    • Permohonan yang memerlukan clear appearance plus strong adhesion, such as display windows, indicator lenses and protective covers.

How to Use Loctite EA M-31CL

Always follow the latest Henkel Technical Data Sheet and your internal validation procedures, especially for medical applications.

Langkah 1 – Penyediaan permukaan

  1. Pastikan semua permukaan pengikat adalah bersih, kering dan bebas daripada minyak, habuk dan ejen pelepas.

  2. Degrease metals and plastics with a suitable solvent (isopropanol, approved industrial cleaner, etc.).

  3. For maximum strength, lightly abrade metals or rigid plastics, then re-clean to remove particles.

Langkah 2 – Pencampuran

  1. Agihkan resin dan pengeras pada nisbah yang betul. perbandingan campuran (2:1 mengikut isipadu).

  2. Campurkan sehingga sebati. seragam dari segi warna dan konsistensi, scraping the sides and bottom of the mixing cup.

  3. Perhatikan masa kerja / masa guna stated on the TDS; do not use adhesive once it starts to thicken or warm noticeably.

(If using a dual cartridge with static mixer, the system meters and mixes automatically—just discard the initial small amount until flow is uniform.)

Langkah 3 – Permohonan & pemasangan

  1. Terapkan a thin, even bead or film of mixed adhesive to one of the mating surfaces.

  2. Bring the parts together, sliding slightly if needed to ensure full wet-out of the bond area.

  3. Gunakan fixtures, clamps or jigs to hold the parts in the correct position and maintain a consistent, thin bond line during cure.

  4. Avoid creating large pools of adhesive, which can slow cure and generate excess shrinkage.

Langkah 4 – Mengeraskan

  1. Benarkan perhimpunan itu menyembuhkan pada suhu bilik according to the TDS schedule (typically several hours to handling strength, full cure in roughly 24 hours depending on temperature and geometry).

  2. If permitted by your design, a Panas sederhana selepas pengerasan can shorten cure time and optimize final strength and chemical resistance.

  3. Do not subject the bond to full mechanical or thermal load until it has telah diawet sepenuhnya.

Keselamatan & Pengendalian

As with most epoxy systems, Loctite EA M-31CL contains epoxy resins and amine curing agents. Appropriate precautions are needed:

  • Elakkan kontak kulit dan mata; uncured components can cause irritation or sensitisation with repeated exposure.

  • Gunakan dalam a tempat yang berventilasi baik and avoid breathing vapors or aerosols, especially during mixing and curing.

  • Memakai cermin mata keselamatan atau pelindung mata, sarung tangan tahan kimia dan pakaian pelindung yang sesuai.

  • Simpan komponen dalam asli, bekas yang ditutup rapat at the temperature recommended by Henkel.

  • Cegah bahan yang belum diolah masuk saliran atau alam sekitar; buang sisa dan bekas kosong mengikut peraturan tempatan.

Sentiasa rujuk yang terkini Lembaran Data Keselamatan (SDS) dan Lembaran Data Teknikal (TDS) before production use, especially when assembling regulated medical devices.

Soalan Lazim

Q1: What is Loctite EA M-31CL mainly used for?
Loctite EA M-31CL is mainly used for clear, high-strength bonding of plastics, metals and glass, especially in medical devices, diagnostics and optical/sensor assemblies where a transparent bond line and chemical resistance adalah penting.

Q2: Is EA M-31CL suitable for medical applications?
Yes. It is part of Henkel’s medical epoxy range and is commonly used for disposable and diagnostic device assembly, but each device manufacturer must still validate biocompatibility and processing in the final design and regulatory context.

Q3: Does Loctite EA M-31CL require heat to cure?
Tidak. Ia dirumus untuk Penyembuhan pada suhu bilik selepas dicampur. However, applying panas sederhana (within substrate limits) can mempercepat penyembuhan and help achieve ultimate properties faster.

Q4: What materials does it bond best?
Ia mengikat glass, many medical-grade plastics and metals very effectively, making it ideal for sambungan bahan campuran such as plastic housings with metal inserts and clear windows bonded to metal frames.

Q5: Is the cured epoxy electrically insulating?
Yes. The cured Loctite EA M-31CL forms a rigid, electrically insulating bond line, supaya ia boleh digunakan di sekitar PCB-mounted components, sensors and connectors where insulation is needed.

Q6: Can I disassemble parts bonded with EA M-31CL?
Like most structural epoxies, EA M-31CL forms a ikatan kekal. Pembongkaran biasanya memerlukan pemanasan dan kaedah mekanikal (cutting, prying, machining) and may damage one or both components. Design joints assuming pembetulan terhad.

Q7: How clear is the cured adhesive?
When mixed and cured correctly in garis ikatan nipis, EA M-31CL cures to a clear or slightly amber joint, usually suitable for visual inspection and optical paths. Excessive thickness or trapped air can reduce optical quality.

Q8: How long is the working time after mixing?
The working (open) time depends on ambient temperature and mix volume, but is generally on the order of puluhan minit. Always refer to the TDS for exact values and plan your assembly so you complete positioning before gel time.

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