High-Speed Single Screw Film Blowing Machine

Product Overview

Equipped with a high-performance single-screw extrusion system, this High-Efficiency Film Blower is engineered to process a wide range of thermoplastic materials including HDPE, LDPE, and LLDPE, delivering a maximum output of over 100kg/h. With a film thickness range of 0.015mm to 0.15mm, it ensures uniform extrusion and consistent product quality, making it an ideal choice for small and medium-sized enterprises (SMEs) venturing into film manufacturing. Whether producing daily-use films or industrial-grade materials, this film blowing equipment balances efficiency, reliability, and affordability to meet diverse production needs.

Key Features Of This Film Blower

High-Efficiency Melting & Plasticization System

The mSingle-screw Film Blower adopts a single-screw structure with a length-diameter ratio of up to 32:1, paired with a screw made of high-quality 38CrMoALA+ALLOY and a 38Cr barrel. This design enables efficient heating, compression, and melting of plastic granules, transforming them into homogeneous melt for consistent extrusion. It excels in processing PE and PP materials, ensuring thorough plasticization without impurities.

Intelligent Temperature Control Technology

Equipped with an advanced intelligent temperature control system, the machine maintains precise temperature regulation across multiple heating zones. Ceramic heaters provide stable heat distribution, eliminating temperature fluctuations that affect film quality. This feature guarantees the uniformity of film thickness, a critical factor for meeting industry standards.

Flexible Winding & Slitting Mechanism

Supporting both center and surface winding modes, the single-screw film blowing machine offers in-line slitting functionality. It can produce single or multi-roll outputs of various widths, adapting to customized requirements for film dimensions. The torque motor-driven winding system ensures smooth, tight rolls without film deformation.

User-Friendly Operation & Low Maintenance

Designed with simplicity in mind, the High-Efficiency Single-screw Film Blower features an intuitive control panel that allows new users to master operations quickly after basic training. Vulnerable parts are easily accessible and replaceable, reducing downtime and maintenance costs. Its robust construction ensures long-term durability even under continuous operation.

Technical Specifications

Applications

The MYB series produces HDPE, LDPE, and LLDPE blown film — everyday plastic film for grocery bags, trash liners, agricultural mulch, and industrial packaging. Built for manufacturers who need steady output without multi-layer complexity, it covers 0.008 mm to 0.15 mm across three frame sizes.

• Garbage bags & trash liners — HDPE/LLDPE with CaCO₃ filler, 0.015–0.04 mm. The single screw handles filler-loaded material without surging, keeping gauge consistent across full web width.

• Shopping bags & T-shirt bags — Thin-gauge LDPE/LLDPE at 0.012–0.035 mm. Servo take-up maintains tension at speed, so clarity and strength stay uniform from core to outer wrap.

• Agricultural mulch film — 0.008–0.02 mm LDPE/LLDPE. The air ring stabilizes the bubble even pushing below 10 microns in warm conditions.

• Industrial liner & heavy-duty packaging — 0.06–0.15 mm for parts wrapping, construction sheeting. The 40Cr mirror-finish die head resists melt fracture at speed on thicker gauges.

Who This Machine Is For

• Small-to-medium blown film producers — Shops running 2–6 lines who need a workhorse that starts every shift without a controls engineer on standby. The single-screw platform means operators already know the workflow.

• Manufacturers running filler-heavy recipes — If your cost model depends on 20–40% CaCO₃ in HDPE carrier film, the 28:1–30:1 L/D screw handles filler dispersion without the instability shorter screws introduce at speed.

• Film converters entering in-house extrusion — Bag makers and printers who buy jumbo rolls and want in-house production. The MYB series matches the output band converters actually consume — not the 300+ kg/h lines they don't need.

• Export-oriented workshops — 380V/50Hz standard with custom voltage options, CE-certifiable build, designed to survive container shipping without losing die head alignment.

• Producers replacing aging mono-layer lines — Shops on 15-year-old machines where heater bands drift and screw wear forces constant babysitting. Ceramic heaters + PID control close the loop old contactor-based systems can't.

Who Should NOT Buy This Machine

• Producers needing multi-layer barrier film — If your product requires EVOH or PA layers, this is a mono-layer machine. You need an ABA Film Blowing Machine for two-layer or an ABC Film Blowing Machine for three-layer co-extrusion.

• Shops requiring output above 120 kg/h — The MYB-850 tops out around 100–110 kg/h on standard LDPE. For sustained output above 120 kg/h, a larger screw and longer L/D are needed — contact us for a custom review.

• Biodegradable film specialists — PLA and PBAT have a thermal degradation window under 20°C wide. This machine was designed for polyolefins, not heat-sensitive biopolymers. See our Biodegradable Film Blowing Machine range.

Not sure if a single-screw line matches your production mix?

Send us three numbers — target film thickness, material recipe (how much filler?), and daily output in kg — and we'll tell you whether the MYB series fits or what costs less per kg.

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Technical Advantages

Barrier-Screw Geometry for Filler-Loaded Material

The 28:1–30:1 L/D barrier screw keeps filler dispersion even as melt temperature rises. On standard screws running 30% CaCO₃-loaded HDPE, unmelted filler pockets create visible gauge bands. The MYB screw adds a barrier flight in the compression zone — separating melt from solids so filler embeds fully before the metering zone. Unlike general-purpose screws that surge when filler ratio changes, this geometry self-corrects across ±5% filler variation without operator adjustment.

Closed-Loop Air Ring with Bubble Cage

A dual-lip air ring with bubble cage keeps frost line height locked within ±5 mm. A workshop door opening on a humid summer day changes cooling rate enough to wander gauge. The independent upper and lower lips handle bubble formation and thickness uniformity separately. The iris-style bubble cage contacts film only at guide points, so even 0.008 mm gauge doesn't drag. Unlike single-lip rings, this holds setting across seasonal transitions — the winter tune won't fail when monsoon humidity hits.

Servo Take-Up with Tension-Decoupled Winding

Servo-driven nip with torque-motor winding keeps roll hardness even from core to full diameter. On single-reference winders, core-start and full-roll tension can differ by 30% — soft-core waste on one end, stretched-film returns on the other. The MYB decouples them: constant servo nip speed with an independent torque-motor taper curve as roll diameter builds. Finished rolls unwind evenly at the bag-making machine, no telescoping on 600 mm-wide rolls.

Want a production cost comparison for your specific film?

Send us your material cost per kg, electricity rate, and target gauge. We'll return a free per-kg production cost estimate for the MYB series vs. your existing line — with payback calculation so you know when the switch pays for itself.

→ Request your cost estimate

Real Production Issues It Solves

• Gauge drift after lunch break — Factory temperature climbs 6–8°C by afternoon, frost line shifts up, film thins. The closed-loop air ring adjusts cooling-air volume to hold position automatically — one setting holds across a full shift unless ambient swings exceed 12°C.

• Filler streaks in black carrier film — At 35% CaCO₃, standard screws leave white undispersed streaks — rejected rolls reground at cost. The MYB barrier screw adds shear in the compression zone, breaking agglomerates before the metering section. Streak rate drops below visible threshold.

• Bubble collapse during voltage sag — In industrial parks where grid dips 10–15% at peak hours, heater output drops and the bubble freezes unevenly. Ceramic thermal mass buffers the sag; the PID recalculates from actual zone temperature, not open-loop percentage. A 30-second dip doesn't become a bubble collapse and 20-minute restring.

• Telescoping rolls at the converter — Aggressive winder tension ramps cause inner-layer slip — jammed unwinds downstream. The torque-motor taper curve reduces tension as diameter grows, so outer wraps never pull tight enough to telescope inner layers on 600 mm rolls.

Production Scenarios

How It Works

1. Material feeding: PE granules plus CaCO₃ filler and masterbatch load into the hopper — manually or via vacuum loader. The feed throat is water-jacketed to prevent bridging from premature melting.

2. Plasticizing & melting: The rotating screw conveys material through the heated barrel. Ceramic bands heat zone by zone (150–200°C for LDPE, 170–230°C for HDPE). The screw compresses, shears, and homogenizes the melt.

3. Filtration & die head extrusion: Melt passes through a screen changer and enters the spiral mandrel die. The 40Cr mirror-surface die distributes melt into uniform annular flow.

4. Bubble formation & cooling: Compressed air inflates the melt into a bubble. The dual-lip air ring cools the exterior — lower lip sets frost line, upper lip fine-tunes gauge. Optional IBC boosts output ~15%.

5. Bubble stabilization & collapsing: The iris-style cage guides the bubble through the collapsing frame, folding it flat without wrinkles. Guide rollers minimize contact drag.

6. Nip, treatment & winding: Nip rollers pull film at servo-controlled speed. Optional corona treater increases surface energy for printability. The torque-motor winder produces rolls at specified width.

Optional Configurations

Customer Case

Location: Lagos, Nigeria — packaging film producer
Machine: MYB-700 with corona treater
Product: Printed HDPE garbage bag film, 0.025 mm, 30% CaCO₃
Before: Two older mono-layer machines at 35 kg/h each — 70 kg/h total, two operators. Heater bands failing every 4–5 months. Gauge variation ±12%.
After: One MYB-700 producing 72–78 kg/h, one operator. Gauge variation ±5%. Energy dropped from 0.42 to 0.33 kWh/kg. Payback in 11 months from labor + electricity savings alone.

Why Choose MINGYANG

• 15+ years building blown film lines — Mingyang Packaging Machinery Co., Ltd. manufactures in Guangdong, China, with machines running in 40+ countries. We cast screws, machine barrels, and assemble die heads in-house — not a trading company.

• CE-certified, export-ready — Every MYB machine meets CE safety and electrical standards. Documentation includes wiring diagrams, mechanical drawings, and spare parts list in English.

• Factory acceptance testing before shipment — Your machine runs film at our factory with your material recipe. We record it on video and send it before the container leaves. You see it producing before you pay the balance.

• Installation support included — One engineer travels to your site for installation and operator training (5–7 days). Remote video support available after commissioning.

• 12-month warranty with stocked spares — Covers screw, barrel, gearbox, motors, and heaters. Common wear parts — heater bands, screen packs, sealing rings — ship from stock within 48 hours.

Frequently Asked Questions

Performance and Material Compatibility

What materials can the MYB series run?

HDPE, LDPE, LLDPE, and blends with up to 40% CaCO₃ filler. It also handles recycled PE with a screen changer fitted. It is not designed for PLA, PBAT, or other heat-sensitive biodegradable resins — those require specialized low-shear screw geometry and tighter temperature control (±1°C).

What's the thinnest film the MYB series can produce?

0.008 mm (8 microns) on LDPE/LLDPE blends with the MYB-850. At this gauge, bubble stability depends on ambient conditions too — a draft-free bay and consistent workshop temperature (25±5°C) are needed for reliable 8-micron running.

How does screw L/D ratio affect output and mixing quality?

Longer L/D provides more length for heating, compression, and mixing. The MYB-600 at 28:1 handles filler loads up to 30%. The MYB-700/850 at 30:1 adds two diameters of mixing — noticeable when pushing filler above 30% or switching between HDPE and LLDPE recipes with different melt-temperature requirements.

Purchasing and Delivery

What's the lead time for an MYB machine?

Standard configurations ship in 25–35 days from order confirmation. Custom voltage or non-standard die head sizes add 5–10 days. Sea freight transit time depends on destination — typically 15–25 days to West Africa, 25–35 days to South America, 10–18 days to Southeast Asia.

What should I prepare before the machine arrives?

A level concrete pad (footprint + 1.5 m clearance), a power supply with a dedicated breaker rated 25% above full load, a compressed air line (0.6–0.8 MPa), and cooling water for the feed throat. We send the installation drawing and utility checklist 2 weeks before shipment.

Can I visit the factory before buying?

Yes. Visit our Guangdong factory and we'll run your material at your target gauge. Bring your own raw material — we match your actual production conditions, not ideal demo settings.

Installation and Maintenance

How long does installation and training take?

Mechanical install: 2–3 days with your crew. Electrical & commissioning: 1–2 days. Operator training runs concurrently — 3–5 days covering startup, shutdown, gauge adjustment, material changeover, and troubleshooting. Most operators run independently by day 4.

What's the daily maintenance routine?

Each shift: check gearbox oil, clean die lip of polymer buildup, check blower intake air filter. Weekly: inspect heater band connections for looseness, clean screen changer, check nip roller rubber. Monthly: measure screw flight clearance with a feeler gauge — exceeding 0.5 mm on a 50 mm screw means plan a replacement.

How long do heater bands last?

Typically 8–14 months under 24/6 operation. First sign: a zone can't hold setpoint — PID at 100% duty cycle but temperature stays 5–10°C below target. A failed band reads open-circuit on a multimeter. Keep one spare per zone size; plug-connect replacement takes 15 minutes.

Get Your MYB Series Quote

Tell us about your production:

• Film type & application: What are you making? (garbage bags, shopping bags, agricultural film, industrial liner)

• Material recipe: HDPE / LDPE / LLDPE? Filler percentage? Recycled content?

• Target thickness & width: Gauge in mm or micron, and layflat width of finished roll

• Daily output target: How many kg per day or month?

• Power supply: Voltage, frequency, and phase at your factory

• Optional features: Corona treater? Auto loader? Dual winder? IBC?

• Destination port: For freight inclusion in quotation