Manufacturers searching for “screw barrel for HDPE/PP/PET” usually require reliable, high-output extrusion solutions that can handle different material characteristics. HDPE, PP, and PET each have unique melting behaviors and processing requirements, which means the screw and barrel design must be optimized for shear, mixing, temperature control, and wear resistance.
At Zhoushan Juyuan Machinery Co., Ltd., we specialize in engineering high-precision screw barrels for HDPE pipe extrusion, PP profile extrusion, and PET pelletizing or sheet production. With over 20 years of experience and advanced CNC manufacturing, we deliver custom-designed solutions that maximize output and product quality.
Material Characteristics: Why Design Matters
1. HDPE (High-Density Polyethylene)
- Low melting temperature
- Requires gentle shear
- Sensitive to overheating
A properly designed screw ensures uniform melt and prevents degradation.
2. PP (Polypropylene)
- Higher melting temperature than HDPE
- Requires balanced shear and mixing
- Sensitive to filler distribution (CaCO₃, talc, pigments)
A custom mixing section helps improve output and color consistency.
3. PET (Polyethylene Terephthalate)
- High melting point
- Requires strong plasticizing capability
- Moisture-sensitive, often used in pelletizing and sheet lines
A vented or double-vent screw is often recommended to improve drying efficiency.
Different materials require different geometry—one universal screw cannot achieve the same result, which is why clients worldwide choose custom HDPE/PP/PET screw barrels.
Our Screw Barrel Solutions for HDPE, PP, and PET
✔ Single Screw Barrel
Ideal for pipe, sheet, and pelletizing lines.
✔ Parallel Twin Screw Barrel
Used for high-output PP and PET compounding.
✔ Custom Designs for Each Material
We adjust:
- Compression ratio
- Mixing section
- L/D ratio
- Flight depth
- Shear strength
to match your specific extrusion requirements.
✔ Wear-Resistant Options
Processing HDPE/PP/PET with fillers or recycled materials requires stronger materials. Available options:
- Bimetallic barrel liner (HRC 62–65)
- PTA alloy hardfacing
- DC53 / SKD61 tool steel
These options extend service life and reduce downtime.
Applications We Support
HDPE
- Water/gas pipe extrusion
- Blow molding
- HDPE granules
PP
- Profile extrusion
- PP sheet
- WPC extrusion
- Filled PP compounds
PET
- PET pelletizing
- PET sheet extrusion
- PETG processing
We provide OEM replacement screw barrels for brands like KraussMaffei, Cincinnati, Bausano, Davis-Standard, Haitian, and more.
Internal Link (SEO Optimization)
Explore our full range of screw & barrel solutions:
👉 https://juyuan-machinery.com/
What Customers Are Really Looking For When They Search “Screw Barrel for HDPE/PP/PET”
This keyword shows clear purchasing intent. These buyers want:
1. A screw barrel optimized for their specific materials
Not a universal design—but a tailored solution.
2. Higher production output
A well-designed screw increases extrusion efficiency by 10–40%.
3. Better melt quality & fewer defects
Especially important for PET sheet, PP profile, and HDPE pipes.
4. Wear-resistant options
Because recycled materials and fillers cause fast wear.
5. A reliable manufacturer
Who can read drawings, measure old parts, and deliver globally.
Juyuan Machinery meets all these needs with professional engineering and fast service.
Contact Us for a Free Quotation
If you need a screw barrel for HDPE, PP, or PET, we deliver precise solutions with competitive pricing.
📞 WhatsApp: +86 13905808474
📧 Email: cxj.job@gmail.com
🌐 Website: https://juyuan-machinery.com/
Send us your drawing or machine nameplate—we will quote within 12 hours and assist you with material selection.