Stretch Film and Wrap Film Washing Line

Product Overview

The stretch film and wrap film washing line is a customized pre-processing equipment specifically designed for recycling waste plastic films, integrating crushing, washing, and dehydration into a single, seamless process. Tailored to meet the production capacity requirements of different customers, this equipment employs a five-stage closed-loop process to thoroughly remove contaminants such as dirt, ink, and light or heavy impurities from used films, ultimately producing clean, dry film material that can be directly fed into subsequent pelletizing operations, providing a high-quality raw material foundation for plastic recycling. With its high degree of automation, significant water-saving performance, and excellent impurity removal rates, this equipment stands as a core auxiliary system in the field of film recycling and processing.

Technical Principles and Process Flow

The stretch film and wrap film washing line utilizes a five-stage closed-loop process—crushing + frictional washing + flotation separation + rinsing + squeezing—to precisely address the distinct processing needs inherent in recycling waste films, ensuring comprehensive and thorough washing:

1. Coarse Crushing Stage: Loose or whole-roll waste films are conveyed by a belt feeder into a dual-shaft shredder, where they are coarsely cut into strips measuring 8–15 cm in length. This step effectively breaks down large, bulky clumps, preventing bridging issues that could hinder subsequent fine crushing and washing stages, thus avoiding material buildup and equipment blockages.

2. Fine Crushing Stage: The shredded strips are then fed into a high-speed pulverizer, which cuts them into small fragments measuring 1–3 cm. This significantly increases the material’s surface area, enabling more effective contact between the material and the washing solution during subsequent steps, thereby enhancing washing efficiency and achieving superior cleanliness.

3. High-Speed Frictional Washing: The crushed fragments are transferred to a horizontal frictional washer, where spiral blades drive the material through rapid collisions and self-friction, while flowing clean water vigorously removes surface dirt, dust, and loose ink. Removed impurities are discharged through side-wall screens along with wastewater, completing the initial washing phase.

4. Flotation Separation and Rinsing: After frictional washing, the material flows into a primary flotation tank, leveraging differences in density to separate various impurities. Lighter materials like paper labels, floating dust, and lightweight plastics are carried away with the water flow, while heavier contaminants such as dense mud and metal debris settle at the bottom, ready for periodic discharge. As the material moves through the tank via a screw conveyor, it undergoes further deep rinsing to eliminate any remaining impurities.

5. Secondary Clean Water Rinsing + Squeezing: Following flotation separation, the material enters a secondary clean-water rinsing stage to remove any residual fine impurities, after which it is sent to a screw-type dewatering machine. Physical squeezing removes excess moisture, while a screen filters out remaining fine residues, yielding dry film material with low moisture content and high cleanliness—ready to be directly fed into downstream pelletizing processes without additional treatment.

Key Performance Data

1. Processing Capacity: 500–2,000 kg/h, customizable to match specific customer production needs, catering to enterprises of varying scales.
2. Dirt and Dust Removal Rate: ≥96%, ensuring thorough elimination of all types of impurities and guaranteeing the quality of the final dry film product.
3. Post-Squeezing Moisture Content: ≤5%; the resulting low-moisture dry film can be directly fed into pelletizing operations, avoiding issues such as bubbling or broken pellets caused by excessive moisture.
4. Water Recycling Rate: ≥88%; most wash water is recycled and reused, significantly reducing water consumption costs and wastewater treatment burdens during production.

Core Product Advantages

1. Low Water Consumption and Cost Efficiency: With a water recycling rate exceeding 88%, wash water is extensively reused, cutting water usage per ton of processed material by up to 80% compared to traditional washing systems. This substantially reduces both water consumption and wastewater treatment expenses, aligning with environmentally friendly and energy-efficient production principles.

2. Full-Process Automation: The entire production line features automated belt conveyors linking each processing stage, minimizing manual handling and reducing operator workload and error rates. Only two operators are required to oversee the entire line, lowering labor costs by 65% and improving production continuity and efficiency.

3. Long Service Life of Wear-Resistant Materials: Both the friction chamber and screening components are crafted from durable wear-resistant materials, capable of withstanding prolonged friction and impact, extending equipment lifespan, reducing maintenance costs, and minimizing downtime for repairs, thereby ensuring stable and reliable operation.

4. Excellent Impurity Removal Performance: With a dirt and dust removal rate exceeding 96%, this equipment effectively eliminates all kinds of contaminants from used films, producing consistently clean dry film suitable for direct feeding into downstream pelletizing processes, thus preventing mesh clogging issues caused by excessive impurities.

Core Product Value

1. Cost Reduction and Efficiency Gains: By maximizing water recycling and automating operations, overall production costs are significantly reduced; meanwhile, smooth process integration boosts productivity, creating greater economic benefits for businesses.

2. Enhanced Raw Material Quality: The high impurity removal rate ensures that the produced dry film meets strict cleanliness standards, leading to more consistent quality in downstream pelletizing processes and reducing problems such as mesh clogging, bubbling, or broken pellets, thereby elevating the overall quality of recycled plastics.

3. Customizable Solutions: The production line can be tailored to suit specific customer capacity requirements, meeting the needs of enterprises of all sizes—from small-scale film recycling plants to large-scale resource recovery companies—ensuring an appropriate solution for every operation.

Target Customer Base

The target customer base for the stretch film and wrap film washing line encompasses enterprises across the entire film recycling value chain, including film recycling plants, resource recovery industrial parks, large-scale plastic recycling companies, and packaging film manufacturers. These businesses all have pressing needs for processing and recycling waste plastic films, and this equipment provides them with efficient, clean pre-processing solutions that enhance both the efficiency and quality of their recycling operations.

Applicable Materials and Application Scenarios

This equipment is suitable for pre-treating various types of waste plastic films, including agricultural greenhouse films heavily contaminated with soil, industrial packaging stretch films, BOPP/CPP waste films, courier plastic bags, and adhesive composite films. Whether dealing with agricultural films laden with dirt or packaging films stained with ink or adhesives, this equipment’s five-stage process delivers effective washing. Its primary application lies within the recycling and processing stages of waste plastic films, supplying high-quality, clean dry film material to downstream pelletizing operations, making it an indispensable core component in the plastic recycling workflow.

Addressing Industry Pain Points

1. Solving the Problem of Frequent Mesh Clogging During Pelletizing Caused by Contaminated Films: With a dirt and dust removal rate of ≥96%, this equipment thoroughly clears soil and other impurities from the material, reducing the frequency of mesh changes in downstream pelletizing operations by 75%, shortening equipment downtime for washing, and boosting the continuity and efficiency of the pelletizing process.

2. Improving Low Manual Washing Efficiency and Unstable Cleanliness: Fully automated operations replace traditional manual washing methods, not only increasing washing efficiency but also ensuring consistent cleanliness of the output material, eliminating quality fluctuations caused by human error.

3. Alleviating High Water Consumption and Expensive Wastewater Treatment: With a water recycling rate of ≥88%, fresh water usage is drastically reduced, cutting water costs while simultaneously decreasing wastewater discharge volume and easing the burden on wastewater treatment facilities.

4. Resolving Issues of Excessive Moisture Leading to Pelletizing Defects Such as Bubbling or Broken Pellets: With post-squeezing moisture content below 5%, the resulting dry film material can be directly fed into pelletizing operations, avoiding defects caused by excessive moisture and enhancing the quality and pass rate of the final pelletized products.

Frequently Asked Questions (FAQ)

Q1: What types of waste films can the stretch film and wrap film washing line process?
A: This equipment handles a wide range of waste films, including agricultural greenhouse films heavily soiled with dirt, industrial packaging stretch films, BOPP/CPP waste films, courier plastic bags, and adhesive composite films. It effectively cleans films containing various types of impurities.

Q2: What is the equipment’s processing capacity range, and can it be customized?
A: The standard processing capacity ranges from 500 to 2,000 kg/h, with options for customization based on actual customer production needs, accommodating enterprises of different sizes.

Q3: What cost savings can this equipment bring to businesses?
A: With a water recycling rate of ≥88%, water consumption per ton of processed material is reduced by 80%, significantly cutting water costs; the entire line requires only two operators, slashing labor costs by 65%; moreover, the frequency of mesh changes in downstream pelletizing operations drops by 75%, reducing maintenance and downtime losses, resulting in a substantial overall reduction in production costs.

Q4: Can the dry film produced by this equipment be directly fed into pelletizing operations?
A: Yes, the dry film produced after processing has a moisture content of ≤5% and meets cleanliness standards, making it suitable for direct connection to downstream pelletizing processes without requiring additional dehydration or washing steps, thereby improving the efficiency of process integration.