Precision Machining
- CNC Machining Service
- CNC Milling
- CNC Turning
- Automatic Turning
- Machining Screw/Rivet
- Wire EDM Machining
- Casting & CNC
- Aluminum Profile & CNC
- Cold Heading & CNC
LML Metal Products Ltd.No. D309, Yunchuang E Valley, No. 3 Huanshi West Road, Tangxia Town, Dongguan City, Guangdong,China
(86) 17833674102dlynn9527@gmail.com
Materials
CNC Machining in PET
High strength and toughness, fatigue resistant. Alloy steels incorporate additional alloying elements beyond carbon, leading to heightened hardness, toughness, fatigue resistance, and wear resistance
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PET
Designers and engineers frequently choose aluminum and aluminum alloys for CNC machining and CNC milling parts. Makes sense. This all-purpose metal has been proven to offer:
- * Excellent machinability
- * High strength
- * Hardness
- * Heat tolerance
- * Corrosion resistance
- * Electrical conductivity
- * Low weight
- * Low cost
- * Overall versatility
Description
- Applications
- Food/beverage containers, packaging films, textile fibers (polyester), engineering parts, disposable medical trays
- Strengths
- Excellent moisture barrier properties, High strength-to-weight ratio, FDA-compliant food safety, Superior chemical resistance (oils, alcohols, weak acids)
- Weaknesses
- Poor heat resistance (max 70°C continuous), Susceptible to hydrolysis (degradation in hot/wet environments), Limited solvent resistance (ketones, chlorinated solvents)
- Process compatibility
- Injection stretch blow molding (primary), injection molding, thermoforming, CNC machining
- Surface Treatment
- Flame treatment, plasma coating, primer-assisted printing
Characteristics
- Price
- $1.2-1.8/kg ✦ Comparable to PP, 20-30% cheaper than PC
- Lead Time
- 5-10 days (molding) / 3-7 days (machining)
- Wall Thickness
- 0.25-1.0mm (bottles/blisters) / 1.5-5mm (structural parts)
- Tolerances
- ±0.2mm (±0.008") molding / ±0.08mm (±0.003") machining
- Max part size
- 600×600×400mm (thermoforming) / 300×300×200mm (molded parts)
PET
| Property Category | Specific Property | Typical Value/Range | Test Conditions/Notes |
|---|---|---|---|
| Basic Properties | Density | 1.33-1.38 g/cm³ | ASTM D792 |
| Water Absorption | 0.1%-0.6% | 24h immersion at 23℃ | |
| Light Transmittance | 88%-90% | Visible light range | |
| Molding Shrinkage | 1.5%-2.5% | Injection molding | |
| Mechanical Properties | Tensile Strength | 50-110 MPa | ASTM D638 |
| Elongation at Break | 200%-300% | ASTM D638 | |
| Flexural Strength | 90-120 MPa | ASTM D790 | |
| Notched Impact Strength | 2-10 kJ/m² | ASTM D256 | |
| Thermal Properties | Melting Point | 250-260℃ | ASTM D3418 |
| HDT (0.45MPa) | 85-90℃ | ASTM D648 | |
| Continuous Service Temp. | ≤120℃ | Long-term use | |
| Short-term Heat Resistance | 160℃ | — | |
| Electrical Properties | Volume Resistivity | 10¹⁴-10¹⁶ Ω·cm | ASTM D257 |
| Dielectric Constant (1MHz) | 3.0-3.3 | ASTM D150 | |
| Breakdown Voltage | 20-25 kV/mm | ASTM D149 | |
| Environmental Properties | Acid Resistance | Stable | Dilute acids, room temp. |
| Alkali Resistance | Poor | Strong bases/high-temp. steam | |
| Solvent Resistance | Partial dissolution | Acetone/benzene solvents | |
| Flammability Rating | UL94 HB | — |
Key Technical Notes
•Barrier Properties: Light transmittance >88% with medium barrier performance (O₂ permeability: 50-90 cm³·mm/(m²·d·MPa))[6](@ref)
•Enhanced Grades: 30% Glass Fiber Reinforced PET increases HDT to >180°C and flexural strength to 200 MPa[5](@ref)
•Chemical Limitations: Susceptible to hydrolysis in high-temperature steam and alkaline environments[4,5](@ref)
Primary Applications
•Packaging: Carbonated drink bottles (pressure-resistant), medical packaging (sterilization-tolerant)[1,3](@ref)
•Electronics: Transformer bobbins, connectors (volume resistivity >10¹⁴ Ω·cm)[2,6](@ref)
•Industrial Parts: Gears, pump housings (superior wear resistance vs. nylon)[5,6](@ref)
Processing Requirements
•Drying: Mandatory at 120-150°C for 3-4 hours (moisture ≤0.02%)[6](@ref)
•Melt Temperature: 260-290°C (±5°C tolerance)[1](@ref)
•Mold Temperature: 60-80°C to optimize crystallinity (30-40%)[4](@ref)
Aluminum Alloys for Machining
LML offers several aluminum alloys in its long list of available manufacturing materials. Two of those alloys are especially well-suited material options for CNC machining, whether milling or turning: Aluminum 6061 and 7075.Aluminum 7075 T651 and T7: Benefits include high strength, hardness, low weight, corrosion resistance, and high heat tolerance. See data sheet for more information.Aluminum 2024 T3: This high-strength alloy offers a high strength-to-weight ratio and high corrosion resistance. See data sheet for more information.GET INSTANT QUOTE
Gallery of Anodized Parts Manufactured by LML
The color of anodized finishes may exhibit some degree of variation due to standard alloy tolerance differences. Please refer to the color scheme below to observe the range of available colors.
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Read more about quality assuranceFAQs
LML takes the stress out of manufacturing by guaranteeing the quality and consistency of every part. Each order is dimensionally and visually inspected by our in-house quality control team to make sure it meets the LML Standard. If you’re not satisfied with your order, we’ll remake your parts as fast as possible, free of charge, or refund you - whichever you prefer.
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LML Metal Products Ltd.No. D309, Yunchuang E Valley, No. 3 Huanshi West Road, Tangxia Town, Dongguan City, Guangdong,China
(86) 17833674102dlynn9527@gmail.com
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