Single-screw extruder | 5-19 mm width | 0.5-1.5 mm thickness | 300-500 kg/h | Water bath → Stretching → Embossing → Winding
Video content to be acquired. Contact Jwell for live demonstration.
The PP Strapping Extrusion Line is part of JWELL’s complete extrusion portfolio. Customers evaluating this PP Strapping Extrusion Line also frequently request our PET Strapping Extrusion Line | Jwell Machinery and PP Sheet Extrusion Line | 300-800kg/h | PP/HIPS/GPPS | Jwell Machinery, which share the same proven screw, die and control platforms. For layout drawings, pricing and lead times, contact JWELL Machinery directly.
| # | Item | Key Point |
| 1 | 🌀 **Single-Screw Extruder** | 28:1 L/D, optimized for PP melt processing and homogenization |
| 2 | ⚡ **300-500 kg/h Output** | high-volume production for industrial strapping manufacturers |
| 3 | 🎯 **5-19 mm Width Range** | covers the complete PP strap product line from light to heavy-duty |
| 4 | 🔄 **Multi-Strand Production** | 2-8 straps simultaneously from a single die for per-ton cost efficiency |
| 5 | 🔧 **Hot-Stretching Orientation** | molecular alignment delivers 80-300 kg tensile strength per strap |
| 6 | ✅ **In-Line Embossing** | surface texture for friction grip in automatic and manual strapping tools |
| 7 | ♻️ **Automatic Coil Winding** | length counting, dual-station, ready-for-shipment coils |
| 8 | 🌍 **CE & ISO 9001 Certified** | international quality and safety compliance |
PP strapping band production places specific demands on the extruder: it must deliver consistent melt quality and melt pressure to the T-die at high throughput (300-500 kg/h) while processing either virgin PP granules or recycled PP — materials with different melt flow indices (MFI), different thermal histories, and in the case of recycled PP, potential contaminants from previous use.
Jwell’s single-screw extruder for PP strapping is specified with a 28:1 L/D ratio, providing three functional zones:
Feed zone (approximately 6 L/D): Preheats and conveys the PP granules forward. The deep screw channel in this zone accommodates the low bulk density of granulate feedstock. A water-cooled feed throat prevents premature melting and granule bridging at the hopper.
Compression zone (approximately 8 L/D): The screw root diameter increases progressively, compressing the PP as it melts. The compression ratio (typically 2.8:1 to 3.2:1 for PP) is selected based on the target melt density of the PP grade being processed.
Metering zone (approximately 14 L/D): Fully molten PP is pumped at constant pressure to the screen changer and die. The long metering zone provides the residence time for thermal homogenization — ensuring all polymer reaches uniform temperature before the die, which directly determines strap thickness consistency.
The screw is manufactured from 38CrMoAlA nitrided steel with 850-950 HV surface hardness. Barrel is bimetallic alloy-lined (58-62 HRC). For recycled PP feedstock containing abrasive contaminants, a bi-metallic screw and barrel package is available.
配图建议: 单螺杆挤出机特写 (to be acquired)
A single Jwell PP strapping line extrudes 2, 4, 6, or 8 straps simultaneously from one T-die head — a multi-strand configuration that delivers three cost advantages over running the same total output on multiple single-strand lines:
Lower capital cost per strap: One extruder, one control system, one operator, and one factory footprint serve all strands. The capital cost per ton of annual capacity is approximately 30-50% lower than the equivalent single-strand lines.
Lower labor cost per ton: One operator runs the entire multi-strand line — same labor for 8-strand output as for 1-strand output.
Lower energy cost per ton: The larger single-screw extruder operates at a higher efficiency point than multiple small extruders. Motor efficiency scales with motor size, and barrel heat loss (the dominant thermal inefficiency) is proportional to extruder surface area rather than throughput.
The multi-strand T-die is custom-configured at order stage for the customer’s target strap width range and strand count. Each strand cavity in the die maintains identical flow path length and pressure drop, ensuring uniform strap dimensions across all strands — width tolerance ±0.1 mm, thickness tolerance ±0.02 mm per strand.
配图建议: 多股打包带从模头同时挤出 (to be acquired)
The extruded PP strip — as it exits the water bath cooling tank — has low tensile strength because the polymer molecules are randomly coiled with no preferred orientation. The hot-stretching oven or hot-water tank is the workcell that transforms this weak, unoriented strip into high-strength strapping band through molecular orientation.
The process: after water bath cooling to a temperature below the PP crystallization temperature, the strip passes through a heated stretching zone (hot-air oven at 90-130°C or hot-water bath at 90-100°C). At this temperature — between the glass transition temperature (approximately -10°C for PP) and the melting point (approximately 165°C for homo-PP) — the polymer chains become mobile enough to slide past each other under tension.
The speed differential between the first haul-off (before the stretching zone) and the second haul-off (after the stretching zone) sets the stretch ratio. For PP strapping, typical stretch ratios range from 5:1 to 8:1 — meaning the strip is drawn to 5-8 times its original length. During this drawing, the PP molecules align along the strap axis, forming a oriented semi-crystalline structure with dramatically improved:
– Tensile strength: 80-300 kg per strap (width and thickness dependent)
– Elasticity retention: Oriented PP retains tension over transport cycles — a critical requirement for pallet securing
– Split resistance: The oriented structure resists the longitudinal splitting that unoriented PP strap would experience under tension
The Jwell line uses a multi-zone temperature-controlled stretching oven with independent zone setpoints, allowing the operator to optimize the temperature profile for specific PP grades (homo-PP, random copolymer PP, recycled PP). The first and second haul-off speeds are independently controlled through ABB inverter-driven motors, with the stretch ratio set and displayed on the Siemens HMI.
配图建议: 热拉伸烘箱或拉伸段工作状态 (to be acquired)
PP strap without surface texture is smooth and slippery — it slips through the feed wheels of automatic strapping machines, fails to grip in the buckle or seal during manual strapping, and produces weak heat-sealed joints because the smooth surface provides minimal contact area for fusion bonding.
The embossing station — positioned immediately after the second haul-off — applies a controlled surface pattern to the strap using a matched pair of embossing and back-up rollers. The pattern provides two functional benefits:
Friction grip: The textured surface has higher friction against the rubber or metal feed wheels in automatic strapping machines, preventing slippage at the high feed speeds (30-60 straps per minute) typical of high-volume packaging lines. For manual strapping tools, the textured surface grips the metal buckle or friction-weld seal positively.
Joint strength: The textured surface increases the contact area for heat-sealing and friction-welding in automatic strapping machine heads, producing stronger joints. The joint is typically the weakest point in a strapped package — embossing directly improves the joint strength and therefore the overall package security.
Pattern options: Net pattern (diamond grid), straight-line pattern, or custom tooled patterns. The embossing roller is interchangeable — pattern changeover takes approximately 30 minutes. Pneumatic cylinder pressure maintains consistent embossing depth across the full web width and at all line speeds.
配图建议: 压花辊和压花后的打包带表面纹理 (to be acquired)
| Parameter | Specification |
| Product | PP (polypropylene) strapping band / packing strap |
| Available Configurations | 2-strand / 4-strand / 6-strand / 8-strand simultaneous |
| Output Range | 300 – 500 kg/h (configuration dependent) |
| Daily Output | 1.5 – 8 tons (per line, configuration and strand-count dependent) |
| Parameter | Specification |
| Extruder Type | Single-screw |
| L/D Ratio | 28:1 |
| Compression Ratio | 2.8:1 – 3.2:1 (PP-optimized) |
| Screw Material | 38CrMoAlA nitrided steel, 850-950 HV |
| Barrel Material | Bimetallic alloy liner, 58-62 HRC |
| Heating Zones | Multi-zone, ceramic band heaters, PID control |
| Drive Motor | AC motor with hard-tooth helical gearbox |
| Inverter | ABB or equivalent, variable frequency |
| Screen Changer | Hydraulic double-station, continuous operation (no-line-stop filter change) |
| Parameter | Specification |
| Strap Width | 5 – 19 mm |
| Strap Thickness | 0.4 – 1.5 mm |
| Width Tolerance | ±0.1 mm |
| Thickness Tolerance | ±0.02 mm |
| Tensile Strength | 80 – 300 kg per strap (dimension dependent) |
| Raw Material | PP granules (virgin homo-PP, random copolymer PP, recycled PP) |
| Parameter | Specification |
| Material Feeding | Vacuum autoloader or screw feeder |
| Extruder Drive | AC motor + ABB inverter variable frequency |
| Die | Custom T-die, multi-cavity, hard-chrome polished runners |
| Cooling | Stainless steel water tank, temperature 25-40°C |
| First Haul-off | Dual rubber roller, variable frequency speed control |
| Stretching Method | Hot-water tank (90-100°C) or hot-air oven (90-130°C) |
| Second Haul-off | Variable frequency speed control, stretch ratio 5:1 to 8:1 |
| Embossing | Pneumatic embossing roller, interchangeable patterns (net, straight, custom) |
| Length Counter | Digital, ±0.5% accuracy, automatic cut-off |
| Winding | Dual-station automatic coil winder, magnetic-particle or servo tension control |
| Coil Dimensions | 200-500 mm OD (configurable) |
| Parameter | Specification |
| Line Speed | 60 – 180 m/min per strap |
| Total Installed Power | 80 – 150 kW (configuration dependent) |
| Control System | Siemens PLC + HMI touchscreen |
| Compressed Air | 0.5-0.7 MPa, ≥ 0.6 m³/min |
| Cooling Water | 0.2-0.4 MPa, ≥ 5 m³/h |
| Factory Space | ≥ 25 m × 4 m × 5 m height |
| Parameter | Specification |
| Certifications | CE, ISO 9001 |
| Available as | Complete turnkey solution |
| After-Sales | Global engineer certification, 48-hour spare parts dispatch |
| Warranty | 12 months from acceptance date (wear parts excluded) |
| 卡片 | 产品名称 / 链接 / 关系 |
| 1 | PET Strapping Band Extrusion Line / /strapping-extrusion/pet-strapping-band-extrusion-line/ / 打包带系列 |
| 2 | PP Sheet Extrusion Line / /sheet-extrusion/pp-sheet-extrusion-line/ / 相同材料平台 |
| 3 | Single-Screw Extruder / /equipment/single-screw-extruder/ / 核心设备 |
| # | 字段 / 类型 / 必填 / 说明 |
| 1 | Name / text / ✅ / placeholder: “Your full name” |
| 2 | Email / email / ✅ / placeholder: “your@company.com” |
| 3 | Country / select / ✅ / 200+国家 |
| 4 | Phone / tel / — / 含国际区号 |
| 5 | Company / text / — / placeholder: “Your company name” |
| 6 | Target Raw Material / select / ✅ / Virgin PP / Recycled PP / Both / Not sure |
| 7 | Strap Width Range (mm) / select / ✅ / 5-9 / 9-15 / 15-19 / Full range |
| 8 | Number of Strands / select / ✅ / 2 / 4 / 6 / 8 / Not sure |
| 9 | Target Output (kg/h) / select / ✅ / <300 / 300-500 / >500 / Not sure |
| 10 | Project Timeline / select / — / Immediate / 1-3 months / 3-6 months / 6-12 months / Information only |
| 11 | Message / textarea / — / placeholder: “Tell us about your production requirements…” |
| — | CAPTCHA / — / ✅ / reCAPTCHA v3 |
| — | Submit / submit / — / “Request Quote & Configuration” |
| # | 检查项 / 状态 |
| 1 | 唯一 H1，含完整产品名 + 核心关键词 / ✅ |
| 2 | H2 技术关键词覆盖: single-screw, stretching, embossing, winding, multi-strand / ✅ |
| 3 | 规格表为 HTML <table> 文本 / ✅ |
| 4 | 所有图片有描述性 alt 属性 / ✅ |
| 5 | 面包屑用 Schema BreadcrumbList / ✅ |
| 6 | FAQ 用 Schema FAQPage (5个Q&A) / ✅ |
| 7 | 产品信息用 Schema Product + 详细 Organization / ✅ |
| 8 | Canonical 自引用 / ✅ |
| 9 | Title tag 50-60 chars / ✅ |
| 10 | Meta description 含工艺流程 + 关键词 / ✅ |
| 11 | Open Graph 完整 / ✅ |
| 信号 | 体现方式 |
| Experience | 六步工艺详解（挤出→冷却→拉伸→压花→收卷）、拉伸比设置、多股同步挤出 |
| Expertise | 单螺杆28:1 L/D PP 优化设计、分子取向拉伸原理、压花纹理功能说明 |
| Authoritativeness | 29年经验、8大基地、3500+员工、25000+设备、1000+专利、CE+ISO 9001 |
| Trustworthiness | 全球工程师认证体系、48小时备件调度、12个月保修、120+国家 |
| 检查项 | 目标值 |
| LCP | < 2.5s |
| CLS | < 0.1 |
| INP | < 200ms |
| Mobile-friendly | ✅ |
| 图片格式 | WebP (建议) |
| 文件夹 | 文件 / 用途 / 状态 |
| 主图/ | PET-PP-Packing-Strap-Extrusion-Line.webp / [C] Hero 画廊 — 产线主图 / ✅ 已有 |
| 详情图/ | 物流仓储PP打包带应用场景.jpg.webp / [H1] 物流仓储应用 / ✅ 已有 |
| 详情图/ | 木材建材PET打包带应用场景.jpg.webp / — (PET 应用，非本页) / 备用 |
| 详情图/ | 纸品印刷打包带应用场景.jpg.webp / [H4] 轻工制造/纸品印刷 / ✅ 已有 |
| 详情图/ | 钢铁行业PET打包带应用场景.jpg.webp / — (PET 应用，非本页) / 备用 |
| 用途 | 优先级 |
| [C] Hero 第二张 — 工艺段特写 | 中 |
| [D] FAT 视频 — 完整生产演示 | 高 |
| [D] 生产现场视频 — 各工位特写 | 中 |
| [F1] 单螺杆挤出机特写 | 中 |
| [F2] 多股打包带同时挤出场景 | 中 |
| [F3] 热拉伸烘箱/拉伸段 | 中 |
| [F4] 压花辊和打包带表面纹理 | 中 |
| [F5] 双工位自动收卷机 | 中 |
| [F6] HMI 操作界面 / 电控柜 | 低 |
| [H2] 食品饮料应用配图 | 高 |
| [H3] 电子产品应用配图 | 中 |
| [H4] 轻工制造/纺织应用配图 | 中 |
| 视频封面图 (poster) | 高 |
| 目标页面 | 位置 / 锚文本 |
| PET Strapping Band Line | [J] Related Products / “PET Strapping Band Extrusion Line” |
| PP Sheet Extrusion Line | [J] Related Products / “PP Sheet Extrusion Line” |
| Single-Screw Extruder | [J] Related Products / “Single-Screw Extruder” |
| 来源页面 | 链接上下文 |
| Strapping Extrusion Pillar Page | 打包带挤出分类页 |
| Packaging Machinery Overview | 包装机械总览 |
| Logistics Packaging Solutions | 物流包装方案页 |
| 维度 | ABS 线 / PP Strapping 线 |
| 挤出机类型 | 单螺杆 33:1 L/D (排气式) / 单螺杆 28:1 L/D |
| 产品形态 | 片材 (0.5-6.0 mm) / 打包带 (5-19 mm宽) |
| 核心工艺 | 挤出→三辊压光→牵引→收卷 / 挤出→水浴冷却→拉伸→压花→收卷 |
| Hero 卖点数 | 9 项 / 8 项 |
| 标签页 | 5 个 (+案例) / 4 个 (无案例) |
| 功能区块 | 8 个 / 6 个 |
| 视频数 | 2 个 / 0 个 (to be acquired) |
| 应用场景数 | 4 个 / 4 个 |
| 案例素材 | 6 张照片 + 视频 / 无 |
| E-E-A-T 重心 | 市场地位 + 规模 / 工艺技术 + 性价比 |
| 独特卖点 | 300+冰箱线90%份额 / 多股同挤 + 拉伸取向原理 |
Logistics centers, distribution warehouses, and e-commerce fulfillment operations are the largest end market for PP strapping band, where it is the standard material for securing cartons, bundles, and pallets for internal movement and shipment. PP strap’s compatibility with fully automatic strapping machines (up to 60 straps per minute in high-speed packaging lines) makes it the material of choice for high-volume distribution operations.
The 9-15 mm width PP strap sizes — the most commonly specified in this market — are produced at high throughput on the Jwell line’s 6-8 strand configuration. The embossed surface pattern ensures reliable feeding through the strapping machine head and strong heat-sealed joints, while the strap’s light weight (approximately 2-3 g/m for 12 mm × 0.6 mm) minimizes shipping weight for e-commerce parcel strapping.
For logistics operations in cold-chain and refrigerated warehouses, PP strap’s resistance to moisture and humidity is a key advantage — unlike paper-based strapping materials that lose strength when damp.
The food and beverage industry uses PP strap to secure beverage cases (bottled water, soft drinks, beer), food cartons, canned goods, and packaged foods for transport from the production facility to retail distribution centers. PP strap is selected because:
– It is lightweight — adding minimal incremental shipping weight
– It is moisture-resistant — does not weaken when condensation forms on cold beverage cases moving from refrigerated storage to ambient temperature
– It is food-contact compliant — food-grade PP grades meeting EU 10/2011 and US FDA 21 CFR 177.1520 are available as a raw material option
– It is economical — the lowest-cost strapping material per meter, suitable for the high-volume, cost-sensitive beverage industry
The 5-9 mm width PP strap sizes are typical for lighter food and beverage cartons; 12-15 mm for heavier beverage cases. Color-coded PP strap (yellow, blue, green, red) is used for product-line identification in multi-SKU warehouses.
The PP strapping band production process follows five stages: (1) Single-screw extrusion — PP granules are melted and pumped through a multi-cavity T-die into flat strips; (2) Water bath cooling — the strips are cooled below the PP crystallization temperature to solidify; (3) Hot-stretching — the strips pass through a heated oven or water tank at 90-100°C and are drawn to 5-8 times their original length, orienting the polymer molecules for tensile strength; (4) Embossing — a patterned roller applies surface texture for friction grip and joint strength; (5) Automatic winding — the strips are wound into finished coils with length counting and dual-station non-stop operation. The complete line is PLC-controlled from feeding to winding.
PP (polypropylene) strapping band has lower tensile strength (80-300 kg per strap) but is lighter, more economical, and works with all strapping machine types — fully automatic, semi-automatic, and manual tools. It is the standard choice for carton and pallet strapping in logistics, e-commerce, food and beverage, and light manufacturing. PET (polyester) strapping band has higher tensile strength (300-800 kg per strap), better tension retention over time, and is used as a steel strap replacement in heavy industries — steel mills, lumber mills, brick and tile manufacturers, cotton gins. PP strap is made from granules; PET strap is typically made from recycled PET bottle flakes.
The line is configured at the order stage for 2, 4, 6, or 8 strands extruded simultaneously from a single T-die. The multi-strand configuration reduces per-strap capital cost, per-strap labor cost, and per-ton energy cost compared to running the same total output on multiple single-strand lines. A 6- or 8-strand configuration is standard for high-volume manufacturers serving the logistics and e-commerce segments.
PP strapping band is produced from PP granules: homo-polypropylene (homo-PP) for general-purpose strap with the highest tensile strength; random copolymer PP for improved low-temperature impact resistance (applications in cold-chain and outdoor storage); or recycled PP granules for cost-sensitive applications at 30-50% lower material cost. Color masterbatch dosed at the extruder hopper produces colored strap (yellow, blue, green, red) for product identification. Food-grade PP grades (EU 10/2011, FDA 21 CFR 177.1520) are available for food and beverage strapping.
Tensile strength (80-300 kg per strap) is determined by three factors: (1) Strap dimensions — wider and thicker straps have proportionally higher strength; (2) Stretch ratio — higher draw ratios (typical range 5:1 to 8:1) produce higher molecular orientation and therefore higher tensile strength; (3) PP grade — homo-PP develops higher tensile strength than random copolymer PP at the same draw ratio. The Jwell line’s independent first and second haul-off speed control allows the operator to set the exact stretch ratio for the target tensile strength specification.
Extruder Type: Conical twin-screw, vented; Screw Material: 38CrMoAlA, nitrided, bimetallic optional; Screw Structure: Conical twin, designed for PVC + wood flour + CaCO₃ + foaming agent; L/D Ratio: Optimized for controlled foaming zone
Screw Diameter: Φ 80 mm / Φ 92 mm / Φ 110 mm / Φ 180 mm; Output (24h, SPC): 6-8 T / 12-18 T / 25-32 T / 70-100 T; Line Speed at 4 mm: 0.4-0.6 m/min / 0.8-1.3 m/min / 1.8-2.4 m/min / 5-9 m/min; Screw Material: 38CrMoAlA, nitrided, bimetallic optional / ← Same / ← Same / ← Same
Applicable Material: EVA copolymer (VA content 14-28%), EVA + LDPE blends, EVA + carbon black; Sheet Width: 2,000 – 4,000 mm; Sheet Thickness: 1.0 – 3.0 mm; Production Capacity: 300 – 600 kg/h
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Jwell has manufactured PET sheet extrusion equipment since 2005, accumulating field data from over 400 installed PET lines worldwide. Each new machine generation incorporates refinements validated across hundreds of real production environments — not just lab prototypes.
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Our Changzhou facility operates a full production-scale PET line for customer trials. Bring your raw materials and target specifications — we run your recipe before you commit. The line delivered to your factory is a proven configuration, eliminating startup risk.
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Factory-trained Jwell engineers based in Brazil, Spain, Mexico, and Shanghai travel to customer sites for installation and operator training. Remote diagnostic support via WeChat/WhatsApp responds within 2 hours. Critical spares ship from Shanghai within 48 hours.
Jwell Machinery Co., Ltd sets up in 1997 , we are large manufacturer of plastic extrusion machinery in China, our headoffice was located in Shanghai.
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