Single-Screw Double Lines Extruder

1. The mold used in this machine adopts advanced 90-degree extrusion.
2. The material cylinder used in this machine is made of high-quality alloy steel. It has undergone surface chrome plating treatment, which has strong wear resistance, high temperature resistance, and deformation resistance. It is equipped with a stainless steel electric cold-water tank and can be adjusted to high and low positions at will.
3. The auxiliary traction uses frequency converter speed control, ensuring stable clamping chain performance.
4. The double output has an effective production speed of 70 meters per minute, 4200 meters per hour, fast speed, high output, and high efficiency.

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Parameter
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Model	QT-45G
Material	LLDPE/PP
Extrusion Width	3-50mm
Extrusion Speed	10-90M/min
Diameter of Screw	45mm
Draw Ratio of Screw	30:1
Main Power	7KW
Power of Assistant Machine	3.7KW
Heater	7.5KW
Voltage	50Hz-60Hz380V
Overall Dimension(LxWxH)	6000x1000x1900mm

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PE/PP Computer Version Twin Screw Extruder

Wenzhou Qiteng Machinery Co., Ltd.

Wenzhou Qiteng Machinery Co., Ltd., based in Wenzhou, Zhejiang, China, is a professional machinery enterprise specializing in the R&D, manufacturing, and sales of bag-making machines and supporting packaging equipment. We are committed to delivering reliable and efficient equipment solutions for packaging production across various industries.

Since our founding, we have focused on bag-making machines and built over 15 years of industry experience. Through continuous refinement and technical accumulation in manufacturing processes, we have developed a comprehensive full-process system covering core component machining, machine assembly, and quality control. With extensive production experience and a strong track record, we have become a trusted partner for numerous enterprises worldwide.

We uphold the philosophy of "building a solid foundation with quality." Our packaging equipment features robust frame structures, selected core components, durable construction, and low failure rates, effectively reducing customers' maintenance costs. Our machines achieve low energy consumption and high production efficiency through optimized transmission and control technologies. They accommodate diverse bag-making specifications, helping clients boost output and control production costs.

With consistent product quality and responsive service, our products are sold across all provinces and municipalities nationwide, serving clients across multiple sectors, including food, daily chemicals, building materials, and logistics. We have also expanded into overseas markets, exporting our machinery to customers worldwide.

Looking ahead, Wenzhou Qiteng Machinery Co., Ltd. will continue to be guided by customer needs and driven by quality-centered innovation. We will keep upgrading our product technologies and service systems to provide more competitive bag-making machinery and packaging equipment solutions for domestic and international clients. We aim to work hand in hand with partners to drive the high-efficiency development of the packaging manufacturing industry.

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2026-06-19

Purpose of bag making machine

1. Packaging industry
Food packaging
It is used to make food packaging bags, such as snack bags, rice bags, tea bags, etc. It can achieve moisture-proof, fresh-keeping, sealing and other functions to ensure the quality and safety of food during storage and transportation. For example, the self-supporting bag making machine can make food bags with self-supporting structures, which are convenient for display and use.
Daily necessities packaging
It produces packaging bags for daily necessities such as shampoo, shower gel, and laundry detergent to meet the packaging needs of different specifications and shapes, such as three-side sealing bags, self-supporting bags, etc., to improve the portability and aesthetics of the products.
Pharmaceutical packaging
It is required to have good sealing and barrier properties to prevent drugs from being damp, oxidized or contaminated, and meet the hygiene standards of the pharmaceutical industry.
2. Industrial and agricultural fields
Industrial product packaging
It is used to package industrial parts, hardware products, electronic components, etc. Anti-static bags, shockproof bags (such as bubble film bags), etc. can be made according to the characteristics of the products to protect the products from damage during transportation.
Agriculture and agricultural supplies packaging
Fertilizer bags, seed bags, feed bags, etc. are usually made of high-strength materials with wear-resistant and moisture-proof characteristics, which are suitable for storage and transportation needs in agricultural production. In addition, it can also be used to make film bags for agricultural greenhouses.
3. Logistics and express delivery industry
Express bag production
Express packaging bags are produced through equipment such as point-break continuous roll bag making machines, which have the characteristics of low cost and high production efficiency, meeting the large demand for packaging materials in the express delivery industry. For example, the one-line bottom express paper bag processing production line can make special express paper bags, which is convenient for packaging and labeling.
Logistics turnover bags
Make turnover bags used in logistics transportation to organize and protect goods and improve logistics efficiency.
4. Special purpose packaging
Environmentally friendly packaging
With the increase in environmental protection needs, bag making machines can be used to produce environmentally friendly packaging materials such as degradable plastic bags and paper bags, responding to policies such as the "plastic restriction order" and reducing white pollution.
Customized packaging
Make packaging bags with special specifications, shapes or functions according to customer needs, such as special-shaped bags, packaging bags with zippers, high-temperature cooking bags (for convenience foods), etc., to meet personalized packaging needs.
5. Other fields
Medical field
The production of medical garbage bags, sterile packaging bags, etc. must meet the strict standards of the medical industry to ensure hygiene and safety.
6.Retail industry
Produce supermarket shopping bags, clothing packaging bags, etc. to enhance the packaging experience when selling goods, and at the same time play a role in brand promotion.
The use of bag making machines covers multiple scenarios from daily consumption to industrial production. Its core function is to process plastics, paper, cloth and other materials into packaging bags of different specifications and functions through automated equipment to meet the practicality, safety and economy of packaging in various industries. With the advancement of technology, bag making machines are also developing in the direction of intelligence, high speed and environmental protection to meet the diversified needs of the market.
2026-06-15

The main advantages and uses of bag making machines
I. Efficient Production: Core Strength of Large-Scale Manufacturing

1. High-speed Automation Cuts Labor Costs

Advantages
Fully automatic bag making machines (e.g., high-speed three-side sealers) can produce 200–600 packaging bags per minute, equivalent to the output of 10–20 manual workers. They are especially ideal for mass packaging scenarios for e-commerce, food and other industries.

Application Case
An e-commerce business adopts a roll-fed courier bag making machine for 24-hour non-stop production, satisfying daily shipping demands for 100,000 orders while slashing labor costs by over 60%.

2. Precision Technology Boosts Finished Product Yield

Advantages
Servo-driven bag making machines deliver precise control: cutting tolerance ±0.5 mm and heat-seal temperature tolerance ±2 °C. This minimizes rejects caused by dimensional deviations or leaking side seals. While traditional equipment yields a scrap rate of around 5%, modern models bring it down below 1%.

Application Case
Laminated bag making machines for pharmaceutical packaging deliver consistent hermetic sealing for aluminum-plastic sachets, preventing drug moisture ingress and oxidation, and fully meeting GMP manufacturing requirements.

II. Functional Adaptation: Custom Packaging Solutions for Diverse Scenarios

1. Full Compatibility with All Packaging Materials

Advantages
Our range of bag making machines is compatible with plastic films (PE/PP), paper, composite laminates, biodegradable materials (PLA), woven fabrics and more, catering to differentiated packaging demands across food, industrial and other sectors.

Application Cases
- Food industry: Stand-up pouch machines work with aluminum foil composite films to produce resealable zipper coffee bags with moisture-proof and oxygen-barrier properties.
- Industrial use: Woven sack machines manufacture 100 kg-capacity fertilizer sacks featuring puncture resistance and weather resistance, suited for outdoor transportation.
2. Modular Customization for Niche Market Requirements

Advantages
Modular design enables optional add-ons such as zipper attachment, laser perforation and stand-up bottom forming, enabling customized packaging upgrades.

Application Cases
- Snack packaging: Zipper pouch machines fit resealable zippers onto potato chip bags, improving user experience and reducing spoilage from stale food.
- Electronic goods: Bubble film pouch machines form built-in cushion air layers to absorb shock for phones, laptops and other electronics, replacing bulky traditional foam fillers.
III. Cost Control: Lower Total Packaging Lifecycle Investment

1. Improved Material Utilization & Reduced Waste

Advantages
Intelligent tension control prevents film stretching and deformation, cutting waste rates from 8% on conventional machines to under 3%. The system also supports splicing narrow leftover webs to maximize raw material utilization.

Application Case
A supermarket uses a biodegradable bag making machine equipped with an on-site scrap recycling & pelletizing system, trimming raw material costs by 15% per ton.

2. Integrated Equipment Shortens Production Lead Time

Advantages
Combined film blowing & bag making machines deliver a one-stop workflow from raw resin to finished bags, eliminating the multi-step intermediate handling of separate film extrusion → slitting → bag converting, lifting overall productivity by 50%.

Application Case
T-shirt bag manufacturers deploy integrated lines to process PE pellets into finished bags within 24 hours, enabling fast turnaround for urgent supermarket orders.

IV. Technology Upgrade: Dual Advantages of Eco-Friendliness & Intelligence

1. Green Manufacturing Aligns with Policy & Market Trends

Advantages
Solvent-free lamination bag making machines cut VOC emissions, comply with environmental regulations, and are approved for food-contact packaging such as infant milk powder bags.
Biodegradable bag making machines utilize corn-starch-based raw materials to produce compostable shopping bags, helping clients comply with plastic restriction policies and capture eco-friendly packaging market share.

Application Case
A national convenience store chain uses PLA bag making machines to produce shopping bags fully biodegradable within six months, elevating its corporate sustainability image.

2. Intelligent Operation Streamlines Factory Management

Advantages
PLC control allows one-click parameter switching (bag length, printed patterns, etc.), cutting job changeover time from 2 hours on traditional equipment to just 30 minutes.
IoT-enabled bag making machines upload real-time production data including output, power consumption and fault alerts, supporting digitalized plant management.

Application Case
Major food manufacturers connect intelligent bag making machines to their ERP systems to auto-adjust production schedules according to order volumes, cutting inventory backlogs by over 20%.

V. Industrial Value: Upgrading Conventional Packaging into High-Value Production

1. Food & Pharmaceutical Industries: Guaranteed Safety & Extended Shelf Life

Application Highlights
Vacuum pouch machines remove air and hermetically seal packages to extend the shelf life of meat products beyond 30 days. High-temperature retort pouch machines enable ambient storage for ready-to-eat meals such as self-heating hot pot packaging.
Medical-grade sterilization pouch machines produce pouches fitted with biological indicators, ensuring sterile transport of surgical instruments and lowering hospital cross-infection risks.

2. E-commerce & Logistics: Balanced Efficiency & Cost Savings

Application Highlights
Perforated tear-strip continuous roll courier bag machines support custom sizing (e.g., 20 cm×30 cm, 40 cm×50 cm) to match different products and eliminate excessive packaging waste.
Integrated printed courier paper bag lines print shipping labels and brand logos in-line during production, bringing unit bag costs 30% lower than outsourced printing.
2026-06-09

Bag making machine related applications

Applications classified by industry scenarios
1. Food and fast-moving consumer goods industry
Functional packaging
Stand-up bag making machine: produces coffee bags and milk powder bags with self-standing bottoms, which are convenient for display and have strong sealing properties. They can be reused with zipper structures.
Four-side sealing bag making machine: produces pillow-type packaging bags for snacks such as potato chips and nuts. The high-speed bag making efficiency is suitable for assembly line production.
Vacuum bag making machine: used for vacuum packaging of meat and cooked food to extend the shelf life. It is often used with composite materials to achieve oxygen isolation.
Scenario case
A biscuit company uses a fully automatic high-speed bag making machine, which can produce 300-500 three-side sealed bags per minute. The bag body is printed with the brand LOGO, and the heat sealing technology is used to ensure that the biscuits are moisture-proof.
2. Logistics and e-commerce fields
Efficiency packaging
Point-break continuous roll bag making machine: produces continuous roll express bags. The point-break design facilitates batch tearing and is often used for batch delivery on e-commerce platforms.
Express paper bag production line: produces straight-bottom paper bags, and is equipped with printing equipment to achieve simultaneous printing of address bars and brand logos, reducing packaging material costs.
Bubble film bag making machine: automatically completes the cutting and edge sealing of bubble film, and produces shockproof bags for express packaging of electronic products such as mobile phones and computers.
Scenario case
A logistics park uses intelligent bag making machines to adjust the size of express bags in real time according to the order volume, and is equipped with an automatic labeling system to improve packaging efficiency by more than 30%.
3. Industrial and agricultural scenarios
Durable packaging
Woven bag making machine: produces PP/PE woven bags for packaging heavy objects such as fertilizers, seeds, and cement, with a load capacity of 50-100kg and strong anti-puncture performance.
Ton bag making machine: produces container bags (ton bags) for bulk transportation of industrial raw materials (such as chemical powders), supporting sling design and top/bottom openings.
Agricultural film bag making machine: produces film bags and seedling bags for greenhouses, with UV-resistant materials, strong weather resistance, and adaptable to outdoor environments.
Case Study
A fertilizer plant uses a heavy-duty woven bag making machine with a moisture-proof film built into the bag body, which is used in conjunction with an automatic filling line to achieve efficient packaging of fertilizers and reduce leakage during transportation.

Applications classified by special functions
Environmentally friendly packaging applications
Biodegradable bag making machine: Using materials such as PLA and PBAT as raw materials, it produces shopping bags that can be degraded in the natural environment. In response to the "plastic restriction order", it is commonly found in chain supermarkets and convenience stores.
Personalized customization applications
Special-shaped bag making machine: Makes round, triangular, portable and other special-shaped bags for gift packaging (such as chocolate gift box bags) and cultural and creative product packaging.
Zipper bag making machine: Adds plastic zippers to packaging bags to achieve repeated sealing, commonly used in snack bags, document bags, etc.
High value-added applications
Laser punching bag making machine: Processes breathable holes (such as bread bags) or anti-counterfeiting holes (such as pharmaceutical packaging) on packaging bags to improve functionality and safety.
IV. Application trends of bag making machine technology upgrades
Intelligent production
Servo motor driven bag making machine: Through the PLC control system, precise fixed-length cutting and tension adjustment are achieved, and the error can be controlled within ±0.5mm, which is suitable for high-precision packaging (such as pharmaceutical aluminum-plastic bags).
Green manufacturing
Solvent-free composite bag making machine: reduces the volatilization of glue solvents, reduces VOCs emissions, meets environmental standards, and is often used for food contact packaging.
High-speed integration
Film blowing - bag making integrated equipment: one-stop completion from raw material film blowing to bag making, shortening the production cycle, suitable for large-scale basic packaging bags (such as vest bags) production.

The essence of bag-making machine application is to adapt to the packaging needs of different industries through technology. From material selection, functional design to production efficiency, all need to be optimized in combination with scenarios. In the future, with stricter environmental protection policies and consumption upgrades, bag-making machines will pay more attention to the development of intelligent, green and customized functions to meet the high-end packaging needs in the fields of food, medicine, logistics, etc.