Flexible Container and Space Bag Washing Line

Product Overview

The flexible container and space bag washing line is a customized, integrated production line designed specifically for PP woven bags and ton bags. It can handle various types of soiled woven waste materials, such as cement woven bags, laminated ton bags, grain woven bags, flexible containers, and snake‑skin mesh bags, performing pre‑treatment washing to deeply remove ink, cement clumps, and label impurities, ultimately producing clean shredded material that seamlessly connects to downstream pelletizing processes. This equipment offers a processing capacity ranging from 600 to 1800 kg/h, with an ink removal rate of ≥92%, a sand and soil removal rate of ≥95%, and a final moisture content of ≤4% after squeezing. Additionally, it supports custom configurations based on customer production requirements, including optional hot‑wash units to accommodate both standard and heavily contaminated materials.

Technical Principles and Process Flow

In response to the characteristics of woven bags—high ink content, significant sand contamination, and laminated surfaces—the flexible container and space bag washing line employs a comprehensive process comprising “shredding + intensive frictional ink removal + flotation‑based impurity separation + multi‑stage rinsing + squeezing.” Each step works in close coordination to achieve efficient washing of soiled woven bags:

1. Whole‑Bag Shredding: Bundles or individual woven bags and ton bags are fed by a feeder into a twin‑shaft shredder, where they are coarsely shredded into 5–10 cm pieces. This not only breaks down the woven structure but also releases trapped sand, cement clumps, and other internal contaminants, reducing the difficulty of subsequent washing steps.

2. Intensive Frictional Ink Removal: The shredded material enters a horizontal high‑speed frictional washer, where rapidly rotating, wear‑resistant blades cause intense collisions and self‑friction. Combined with room‑temperature or heated wash water, this process powerfully strips away surface printing ink, residual cement, and laminating adhesive layers. Removed ink and fine sand are discharged through a screen along with wastewater. For handling heavily inked or laminated materials, an optional 80–95°C hot‑wash module can be added, using eco‑friendly detergents for deep washing.

3. Flotation‑Based Impurity Separation: After ink removal, the material flows into a flotation‑and‑rinsing tank, leveraging differences in impurity density to separate them. Paper labels, plastic laminates, and light debris float to the surface and are discharged via an overflow outlet, while heavier sand and metal fragments settle at the bottom and can be periodically removed. As the material moves through the tank via a screw conveyor, preliminary rinsing is simultaneously performed.

4. Secondary Clean Water Rinsing: Following flotation separation, the material enters a secondary clean‑water tank, where fresh water rinses away residual washing agents and fine particles, further enhancing cleanliness and ensuring superior quality for downstream pelletizing.

5. Spiral Squeezing and Dewatering: The cleaned material is fed into a spiral squeezing machine, where physical pressure removes excess moisture. At the same time, a wear‑resistant stainless‑steel screen filters out any remaining fine residue, yielding dry material with a moisture content of ≤4%, fully meeting the feed requirements of pelletizing operations.

6. Water Recycling System: The production line is equipped with a three‑stage sedimentation tank and filtration system, enabling recycled use of wash water and significantly reducing water consumption, thus achieving both environmental sustainability and cost efficiency.

Core Performance Parameters

1. Processing Capacity: 600–1800 kg/h
2. Ink Removal Rate: ≥92%
3. Sand and Soil Removal Rate: ≥95%
4. Moisture Content After Squeezing: ≤4%
5. Optional Hot‑Wash Module Temperature: 80–95°C
6. Water Recycling Rate: Over 85%

Key Product Advantages

1. Outstanding Ink and Sand Removal Performance: Utilizing a high‑speed frictional washing process, even heavily soiled woven bags can have their ink, cement residues, and fine sand efficiently stripped away, achieving an ink removal rate of ≥92% and a sand removal rate of ≥95%, ensuring exceptional cleanliness of the output material.

2. Highly Customizable Adaptability: The equipment can be tailored to meet specific customer production needs, with optional hot‑wash modules available to handle both ordinary soiled woven bags and challenging materials containing heavy ink or laminating adhesives, satisfying diverse production requirements.

3. Long‑Life Wear‑Resistant Components and Low Maintenance Costs: Equipped with alloy‑reinforced wear‑resistant blades, the service life is twice that of standard parts, while the cost of consumable components has been reduced by 45%, significantly lowering long‑term maintenance and replacement expenses.

4. Simultaneous Flotation‑Based Separation of Light and Heavy Impurities: Using density‑based separation technology in the flotation‑and‑rinsing tank, both floating light impurities and settled heavy impurities can be removed in one step, eliminating the need for additional separation equipment, simplifying the production process, and improving overall efficiency.

5. Water Recycling System Saves Water and Protects the Environment: With a three‑stage sedimentation tank and filtration system, the water recycling rate exceeds 85%, reducing water consumption per ton of processed material by 75%. This not only meets eco‑friendly production standards but also cuts production water costs.

6. Seamless Integration with Pelletizing Lines: The final dry material, with a moisture content of ≤4%, can be directly fed into pelletizing equipment without additional processing steps, achieving seamless integration between washing and pelletizing and boosting overall production efficiency.

Core Value Proposition

1. Enhances Quality of Recycled Pellets: With an overall ink and sand removal rate exceeding 93%, this equipment effectively addresses issues like blackening and poor quality commonly caused by traditional washing methods, producing clean shredded material suitable for manufacturing high‑quality recycled plastic pellets.

2. Reduces Pelletizing Costs: By cutting the frequency of screen changes during pelletizing by 70%, minimizing downtime and material costs, and improving operational efficiency, this equipment helps lower overall production expenses.

3. Significantly Cuts Energy and Labor Costs: With a water recycling rate exceeding 85% and a 75% reduction in water consumption per ton, combined with streamlined operations requiring only 2–3 operators per line, labor costs are slashed by 60%, comprehensively compressing total production expenses.

4. Extends Equipment Lifespan: The highly effective sand‑removal process prevents sand and gravel from entering downstream pelletizing equipment, reducing screw wear and prolonging the service life of pelletizing machinery.

Target Customer Base

The primary target customers for the flexible container and space bag washing line include woven bag recycling companies, cement and grain packaging plants, resource‑recycling centers, and large-scale PP recycled pellet factories. These enterprises all face substantial demand for processing heavily soiled woven bags and require efficient, environmentally friendly washing equipment to ensure the quality and efficiency of recycled plastic pellet production.

Application Scenarios

This equipment is primarily used for pre‑washing various types of soiled woven waste materials, covering cement woven bags, laminated ton bags, grain woven bags, flexible containers, snake‑skin mesh bags, and more. Whether it’s batch washing of recycled woven bags at recycling facilities, processing of in‑house waste at packaging plants, or purifying raw materials at recycled pellet factories, this equipment adapts to diverse production needs, providing high‑quality, clean feedstock for downstream pelletizing operations.

Solutions to Industry Pain Points

1. Solves the Problem of Sand and Gravel Wearing Down Pelletizing Screws: The equipment releases internal sand during the shredding stage, followed by flotation‑based separation to further remove heavy impurities, effectively preventing sand from entering pelletizing equipment, reducing screw wear, and extending equipment lifespan.

2. Addresses Blackening of Recycled Pellets Caused by Ink Residue: Through intensive frictional ink removal, achieving an ink removal rate of ≥92%, combined with optional hot‑wash modules for deep treatment of heavy ink, this equipment thoroughly resolves issues of blackening and poor quality resulting from ink residue in recycled pellets.

3. Tackles Frequent Screen Clogging and Replacement During Pelletizing: The exceptionally clean output material significantly reduces impurity levels in the pelletizing process, cutting screen‑changing frequency by 70%, shortening downtime for screen replacements, and boosting overall pelletizing efficiency.

4. Alleviates the Challenges of Manual washing—High Water and Labor Consumption, Insufficient Cleanliness: With an automated production line requiring only 2–3 operators, replacing traditional manual washing, this equipment not only slashes labor costs but also ensures standardized cleanliness through consistent processes. Meanwhile, its water‑recycling system reduces water consumption per ton by 75%, solving the problem of excessive water usage in manual washing.

Frequently Asked Questions (FAQ)

Q1: What is the processing capacity range of the flexible container and space bag washing line?
A: The equipment’s processing capacity ranges from 600 to 1800 kg/h, and it can be customized according to actual customer production needs, adapting to different scale scenarios.

Q2: Can this equipment handle woven bags with heavy ink and laminations?
A: Yes, the equipment can be fitted with an optional 80–95°C hot‑wash module; when combined with eco‑friendly detergents, it can deeply treat heavy ink and laminating adhesives, meeting the washing needs of difficult-to‑process materials.

Q3: What is the water recycling rate of this equipment, and how much water can it save?
A: Equipped with a three‑stage sedimentation tank and filtration system, the water recycling rate exceeds 85%, reducing water consumption per ton by 75% compared to traditional washing methods, thereby significantly cutting water costs.

Q4: Can the clean shredded material produced directly connect to a pelletizing line?
A: Yes, after spiral squeezing and dewatering, the material achieves a moisture content of ≤4%, making it ready for direct feeding into pelletizing equipment, realizing seamless integration between washing and pelletizing.

Q5: How long do the equipment’s consumable parts last, and are maintenance costs high?
A: Equipped with alloy‑reinforced wear‑resistant blades, the service life is twice that of standard parts, while the cost of consumables has dropped by 45%, resulting in lower long‑term maintenance expenses and effectively reducing overall production investment.