Recycled Paper Baling Twine: Transforming Waste into Recycled Resources

During the production process in paper mills (Paper Plants / Paper Factories), a specific type of by-product waste is generated – rope waste, commonly referred to in the industry as “rope material” or “woven waste”. This seemingly insignificant waste stream is a complex mixture primarily composed of iron wire, plastic strips, and various organic impurities.

Despite its complex composition, this mixed plastic waste originating from paper mills holds recycling value. Through appropriate processing techniques, Paper Plant Waste Plastic / Paper factory waste Mixed Plastic can be transformed into valuable recycled resources. The main recycling pathways are as follows:

Pathway 1: Processing into RDF using Dewatering Pelletizing Machines

Rope waste (i.e., Paper factory waste Mixed Plastic before pre-treatment) can be processed using dewatering pelletizing machines to produce RDF (Refuse Derived Fuel). The core of this process is dewatering and pelletizing: mechanical extrusion removes excess moisture from the material and forms it into pellets. The resulting RDF pellets possess a certain calorific value and can be used as a substitute fuel in industrial boilers, power plants, etc., achieving energy recovery while reducing the consumption of primary fuels.

Pathway 2: Processing for Use in Producing Compression-Molded Plastic Products

Besides being used to make RDF, the plastic component of rope waste – Paper Plant Waste Plastic – can be used directly after specific pre-treatment to produce compression-molded plastic products such as pallets, tubs, and chairs. The core of this pathway lies in the refined processing of Paper factory waste Mixed Plastic to meet the production requirements for plastic products. The specific process flow is as follows:

Pre-treatment Stage:

1.Iron Wire Removal: Specialized equipment is used to sort the rope waste (i.e., Paper factory waste Mixed Plastic) and separate out the iron wire. Iron wire, as an impurity, can damage subsequent plastic processing equipment and reduce product quality if it remains in the feedstock. Therefore, this step is crucial for ensuring feedstock purity.

(Key Point: The material after this step is defined as Paper Plant Waste Plastic / Paper factory waste Mixed Plastic after wire removal)

2.Washing: The plastic material remaining after iron wire removal – the Paper Plant Waste Plastic – needs to be washed. The purpose is to remove organic impurities, dust, and other contaminants adhering to the plastic surfaces. Washed Paper Plant Waste Plastic feedstock has higher purity, effectively improving the quality of the final compression-molded products.

Compression-Molded Product Production Flow:

The pre-treated plastic feedstock (Paper Plant Waste Plastic) is formed into finished products through the following production stages:

1. Conveyor Belt: Transports the washed Paper Plant Waste Plastic feedstock to subsequent processing equipment.

2. Primary Extruder: The feedstock is initially melted and plasticized under mechanical heating in the primary extruder.

3. Secondary Extruder: Material processed by the primary extruder enters the secondary extruder for further optimization of the plasticizing effect, ensuring the plastic melt achieves the required uniformity and fluidity.

4. Plastic Dosing Tank: Precisely controls the amount of melt entering the compression molding machine.

5. Compression Molding Machine: The metered plastic melt is injected into the mold cavity. Under pressure, it fills the cavity and cools to solidify (using molds specific to the product, e.g., pallet mold, tub mold).

6. Robotic Arm: Automatically removes the solidified product from the mold.

7. Finished Product Palletizing: Products are conveyed via belt to the palletizing area and stacked according to pre-set patterns.

Conclusion:

The recycling of paper mill rope waste (Paper Plant Waste Plastic / Paper factory waste Mixed Plastic) fully demonstrates the practical value of industrial waste resource utilization. Whether processed into RDF via dewatering pelletizing to achieve energy recovery, or transformed directly into various plastic products serving production and daily life via compression molding lines using processed Paper Plant Waste Plastic, it effectively addresses the solid waste disposal challenges in the paper industry and alleviates the environmental burden of traditional disposal methods. With the iterative optimization of related sorting technologies and processing equipment, the recycling rate of this Mixed Plastic originating from Paper factories will further increase. Its role within the circular economy system will become increasingly significant, providing strong support for the green and sustainable development of the manufacturing industry.