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Product Overview & Key Features

Industrial-grade structural epoxy adhesive engineered for high-stress, load-bearing joints across metal, composite, and engineering plastic assemblies. Built for manufacturing operations requiring high mechanical strength, chemical resistance, and precise gap-filling capabilities without mechanical fasteners.

Target Applications: Structural bonding in industrial equipment, electronic housing assembly, and automotive component mounting.

Chemical Base: Two-part modified epoxy formulation incorporating impact-toughening agents.

Physical Form: Thixotropic paste (formulated to prevent sagging on vertical and overhead surfaces).

Core Performance:

High impact and peel resistance under dynamic mechanical loads.
Controlled exothermic profile during polymerization.
Low volumetric shrinkage ((< 1%)) upon complete cure.
Stable dielectric insulation properties for electronic integration.

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Technical Specifications

Technical Parameter	Test Method / Condition	Typical Value
Chemical Base	—	2-Component Modified Epoxy
Mix Ratio (By Weight/Volume)	Resin : Hardener	1:1 or 2:1
Viscosity (25°C)	Brookfield (Spindle 7, 20 rpm)	Resin: 45,000 mPa·s / Hardener: 25,000 mPa·s
Color (Mixed)	Visual	Gray / Black / Off-white
Open Time / Work Life (22°C)	100g mass	20–25 minutes
Fixture Time	Achieving 1 MPa lap shear	45–60 minutes
Full Cure Schedule	25°C / 80°C	24 hours / 2 hours
Tensile Lap Shear Strength	ASTM D1002 (grit-blasted aluminum)	> 22 MPa
T-Peel Strength	ASTM D1876	4.5 kN/m
Operating Temperature Range	Continuous exposure	−40°C to +120°C (up to +150°C short term)

Materials Compatibility & Application Guidelines

Substrate Compatibility

Compatible with multiple industrial substrate categories, subject to specific material validation.
Metals: Anodized aluminum, cold-rolled steel, stainless steel, and galvanized sheets.
Composites: Carbon fiber reinforced polymers (CFRP) and fiberglass (FRP/GRP).
Plastics: ABS, polycarbonate (PC), rigid PVC, and nylon (surface pre-treatment required).

Surface Preparation

Cleaning: Remove all surface oils, grease, and mill scale using approved solvents (IPA or acetone).
Mechanical Abrasion: Grit blasting or mechanical sanding followed by secondary solvent wiping is required on metals to maximize structural bond strength.

Dispensing & Mixing

Utilize dual-cartridge pneumatic guns with static mixing nozzles or automated meter-mix-dispense (MMD) equipment to ensure strict stoichiometric ratio compliance.
Discard the initial 10–15 mm of mixed material from a new nozzle to prevent unmixed component application.

Curing Conditions

Maintain recommended ambient assembly temperatures between 18°C and 30°C.
Thermal acceleration (60°C for 30 minutes) may be applied after initial room-temperature gelation to shorten production cycle times.

Storage & Handling

Store in original, unopened containers between 8°C and 21°C in a dry environment.
Shelf Life: 12 months from the manufacturing date. Refer to the product Safety Data Sheet (SDS) for personal protective equipment and spill management protocols.

Manufacturing & Quality Control

Production Control

Manufactured using automated vacuum-mixing reactors to eliminate entrapped micro-voids and prevent viscosity drift.

In-Process Testing

Brookfield viscosity testing, exotherm peak verification, and filler dispersion checks monitored per production batch.

Traceability & Documentation

Each commercial shipment includes a lot-specific Certificate of Analysis (CoA), Technical Data Sheet (TDS), and GHS-compliant Safety Data Sheet (SDS).

International Export Logistics

Supplied in standard industrial packaging (50 ml / 400 ml dual cartridges, 20 kg pails) fully supported by Dangerous Goods (DG) declarations for safe sea and air freight.

Frequently Asked Questions

Q: How do I select the right structural epoxy adhesive for my substrates?

A: Start by identifying the materials to be bonded, joint design, required bond performance, curing conditions, and operating environment. Review test data for the relevant material combination and confirm compatibility before final selection.

Q: How does surface preparation affect lap shear strength on aluminum substrates?

A: Unprepared aluminum with native oxide layers yields inconsistent adhesion. Degreasing combined with mechanical abrasion significantly increases surface energy, consistently raising lap shear strength from < 10 MPa to > 22 MPa.

Q: Can this adhesive withstand powder coating or paint bake cycles?

A: Yes. Fully cured joints withstand thermal exposure up to +180°C for 30 minutes, making them compatible with standard electrostatic powder coating and paint curing ovens.

Q: What is the protocol for handling uncured resin and hardener residue?

A: Uncured material should be scraped off with a non-metallic scraper and cleaned using anhydrous isopropyl alcohol. Nitrile gloves and eye protection are mandatory during handling as outlined in the SDS.

Q: How do you ensure batch-to-batch consistency for automated dispensing lines?

A: Every production batch undergoes strict rheological testing (viscosity index and shear-thinning behavior) to guarantee steady flow rates through automated meter-mix-dispense equipment without pressure spikes.

Q: What quality documents and export packaging options are provided?

A: Shipments include a lot-specific CoA, TDS, and SDS. Standard packaging includes dual cartridges and bulk pails, backed by complete international transport compliance documentation.

Guangdong Yrbest High Polymer Technology Co., Ltd. is one of the most professional special adhesive manufacturers and suppliers in China, featured by quality products and good price. Please rest assured to buy bulk advanced special adhesive from our factory. Contact us for quotation and free sample.