PP Strapping Extrusion Line

Name: PP Strapping Extrusion Line
Brand: JWELL
SKU: pp-strapping-extrusion-line

Key Features

See PP s

PP-Optimized Single-Screw Extruder — 28:1 L/D for Consistent Melt Quality

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)

2-8 Strands Simultaneously — Maximize Throughput, Minimize Per-Strap Cost

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)

Hot-Stretching Orientation — Molecular Alignment Delivers 80-300 kg Tensile Strength

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)

Embossing Station — Surface Texture for Secure Feeding and Strong Seals in All Strapping Tools

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.

Technical Specifications

Line Overview

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)

Extruder

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)

Strap Specifications

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)

Process Stations

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)

Line Performance

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

Certifications & Utilities

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)

[J] RELATED PRODUCTS 相关产品

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

[L] INQUIRY FORM 询价表单

#	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”

4.1 On-Page 元素

#	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 / ✅

4.2 E-E-A-T 信号强化

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

4.3 技术性能

检查项	目标值
LCP	< 2.5s
CLS	< 0.1
INP	< 200ms
Mobile-friendly	✅
图片格式	WebP (建议)

5.1 已有图片资源

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

5.2 尚需补充的资源

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

本页链接到 (Outbound)

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”

从其他页面链接到本页 (Inbound)

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

八、与 ABS 线页面结构的关键差异

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 & E-Commerce — Standard PP Strap for Carton and Pallet Securing

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.

Food & Beverage — PP Strap for Beverage Cases, Food Cartons, and Bottled Goods

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.

Frequently Asked Questions

What is the production process for PP strapping band? -

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.

What is the difference between PP strapping band and PET strapping band? +

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.

How many straps does a Jwell PP strapping line produce simultaneously? +

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.

What raw materials are used for PP strapping band production? +

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.

What determines the tensile strength of PP strapping band? +

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.