Durostone CDM Sheet

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Product details

AHD CDM Sheet (Durostone): High-Performance Thermoset Composite for Industrial Applications

1. Product Overview

AHD CDM Sheet (commonly known as Durostone Sheet) is a premium thermoset composite material, engineered by impregnating high-strength glass fiber with modified epoxy resin, followed by high-temperature pressing and precision curing. It is distinguished by its exceptional mechanical rigidity, impact resistance, heat stability, and chemical inertness—making it a top choice for demanding industrial scenarios where standard plastics or metals fail to deliver long-term reliability.

As a specialized product from AHD Polymer (a 31-year leader in engineering plastics), this CDM Sheet is produced via ISO-certified processes, supported by 200+ technical specialists (including 30+ senior engineers). It delivers consistent batch-to-batch quality, meeting the strict requirements of industries like heavy machinery, aerospace, and renewable energy, and outperforms traditional materials such as steel or aluminum in weight-to-strength ratio and corrosion resistance.

AHD Black CDM Sheet

I. Core Characteristics and Advantages of Durostone Board

Durostone board's design focuses on the industrial requirements for high strength, environmental resistance, dimensional stability, and insulation. Its core advantages include:

1. Excellent Mechanical Properties

High Compressive/Impact Strength: Tensile strength can reach 80-150 MPa (depending on the formulation), and flexural strength is 100-200 MPa, far exceeding that of ordinary plastics and approaching that of some metals.

Fatigue Resistance: Resists cracking under repeated stress, making it suitable for long-term load-bearing applications (such as jigs and fixtures).

2. Excellent Chemical Resistance

Durostone board is highly resistant to acids, alkalis, and organic solvents (such as acetone and gasoline). It can withstand long-term contact with corrosive media without swelling or decomposition, surpassing metals (which are prone to rust) and ordinary plastics (which are easily swelled by strong solvents).

3. Wide Temperature Range Stability

High Temperature Resistance: Short-term temperature resistance reaches 350°C (depending on the resin type, higher for phenolic resin-based materials) and long-term operating temperature reaches up to 250°C, far exceeding epoxy resin-based composite materials.

Low Shrinkage: Low thermal expansion coefficient (approximately 2-5 × 10⁻⁵/°C), ensuring dimensional stability under high temperatures or temperature fluctuations, preventing deformation (e.g., in precision mold supports).

4. High Electrical Insulation

Volume resistivity ≥ 10¹² Ω·cm and high breakdown voltage (≥ 20 kV/mm), making it suitable for insulating components in the electrical and electronic fields (e.g., circuit board brackets, high-voltage insulation pads).

5. Low Moisture Absorption and Aging Resistance

Water absorption is less than 0.5% (much lower than wood or ordinary epoxy boards). It is resistant to wet and heat aging (e.g., no failure after long-term use at 85°C/85% RH), making it suitable for humid or high-humidity environments (e.g., outdoor equipment supports). 6. Ease of Machining

It can be sawed, drilled, and CNC-engraved. The surface is easily sanded and polished without the need for special tools. Machinability is similar to that of wood or acrylic, but with superior performance.

AHD Durostone Plastic Sheet

Ⅱ. Sources of Characteristics: Raw Materials and Production Process

Durostone board properties are determined by its material system and molding process:

1. Resin Matrix Selection

Epoxy resin: Provides strong adhesion, electrical insulation, and chemical resistance, making it suitable for low-shrinkage, high-precision electronic applications.

Phenolic resin: High-temperature resistance (above 200°C) and ablation resistance make it suitable for high-temperature industrial applications (such as automotive engine peripheral components).

Modified resin: Weather resistance or flame retardancy can be further enhanced by adding silane coupling agents and flame retardants.

2. Optimization of Reinforcement Fillers

Glass fiber: Improves mechanical strength (accounting for 30-60% of the filler), while reducing resin shrinkage and improving dimensional stability.

Quartz sand/aluminum hydroxide: Increases rigidity and scratch resistance, and adjusts the thermal expansion coefficient (quartz sand matches the thermal expansion coefficient of the resin, reducing internal stress).

Other fillers, such as carbon fiber (enhances conductivity) or mica (improves dielectric properties), can be customized to meet specific needs. 3. Molding Process Control

Compression Molding: Curing is performed at high temperatures (120-180°C) and high pressures (5-20 MPa) to ensure complete cross-linking of the resin, reduce internal defects (such as bubbles), and increase density and strength.

Post-Processing: Surface polishing or coating (such as epoxy coating) can be used to further enhance scratch resistance and aesthetics.

Ⅲ. Main Application Areas

Durostone board, due to its comprehensive performance, is widely used in industrial applications requiring high material reliability:

1. Electrical and Electronics Industry

Insulation components: such as circuit breaker insulation barriers, transformer bobbins, and PCB test fixtures (requiring high insulation and dimensional accuracy).

Equipment Housings: Casings for high-frequency equipment (such as radar components), utilizing its low dielectric loss and weather resistance.

2. Machinery and Automation

Fixtures: CNC machining positioning fixtures and welding jigs (require wear and impact resistance, and long-term deformation resistance).

Mechanical Structural Parts: Light-load transmission brackets and gearbox covers (reducing weight and noise).

3. Automotive and Rail Transit

Automotive Parts: Battery pack insulation brackets and engine compartment sensor mounting plates (oil-resistant and heat-resistant up to 120°C).

Rail Transit: Insulated flooring and cable clamps within carriages (require flame retardancy and moisture resistance).

4. Chemical and Energy

Corrosion-resistant equipment: Reactor linings and pipe supports (replacing stainless steel, reducing costs and providing acid and alkali resistance).

New Energy: Photovoltaic inverter heat sink brackets (resistant to UV aging and high temperatures).

AHD 2mm Anti Static CDM Plastic Sheet - Durostone CAS761 (anti-static). We also offer Durostone CFR767 (corrosion-resistant). Welcome to contact us.

Ⅳ. Why Choose Durostone?

Its core application lies in addressing the pain points of traditional materials:

Compared to metal: Lightweight, non-magnetic, easy to process, and low-cost (no rust-proofing treatment required).

Compared to ordinary plastic: High-temperature and chemical resistance, with higher mechanical strength, making it suitable for harsh industrial environments.

Compared to natural stone: Non-porous and low-hygroscopic, it avoids staining and deformation.

Customization: The formulation can be adjusted to meet specific requirements (e.g., flame retardancy, high thermal conductivity), meeting diverse application scenarios.

Summary

Durostone achieves comprehensive properties such as high strength, environmental resistance, and high insulation through optimized resin-filler systems and controlled molding processes. This makes it an ideal alternative to metal, ordinary plastics, and natural stone in the industrial sector, especially in applications requiring long-term reliability.