Non-woven fabric recycling method

Abstract

The invention relates to the technical field of non-woven fabric recycling, in particular to a non-woven fabric recycling method which comprises the following steps: step 1, cleaning waste non-woven fabric, removing impurities and drying; secondly, the design that a plurality of crushing rollers are meshed with stirring blocks is adopted, and the non-woven fabric waste is crushed through rotation; thirdly, a return conveying belt with grabbing blocks is arranged, and the waste materials which are not fully crushed are conveyed back to the stirring area to be treated again; and 4, adding a coagulant into the crushed non-woven fabric, and draining to form a fiber sheet. Waste non-woven fabric is cleaned, subjected to impurity removal and dried, a plurality of crushing rollers are meshed with a stirring block to rotate and crush non-woven fabric waste, a return conveying belt with a grabbing block is arranged, the waste which is not fully crushed is conveyed back to a stirring area to be treated again, a coagulant is added to the crushed non-woven fabric, and prepared fiber sheets are compressed and dewatered; and then through high-temperature melting, fibers are prepared again through a spinneret plate, so that waste materials can be converted into high-value products, and environmental pollution is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of non-woven fabric recycling, and specifically to a method for recycling non-woven fabrics. Background Art

[0002] Non-woven fabrics contain synthetic fibers such as polypropylene, and traditional landfilling takes hundreds of years to degrade. Through mechanical, chemical or pyrolytic recycling, pollution of soil and water bodies by microplastics can be reduced. Landfilling or incinerating non-woven fabrics releases methane and harmful gases, and recycling can reduce greenhouse gas emissions. A large amount of water is required for the production of non-woven fabrics, and recycling can reduce water consumption in the production of new raw materials. The present invention provides a method for recycling non-woven fabrics, which has the advantages that waste materials can be converted into high-value products and environmental pollution can be reduced. Summary of the Invention

[0003] (1) Technical Problems to be Solved

[0004] The present invention provides a method for recycling non-woven fabrics, which has the advantages that waste materials can be converted into high-value products and environmental pollution can be reduced.

[0005] (2) Technical Solutions

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A method for recycling non-woven fabrics, comprising the following steps:

[0008] Step 1: Wash, remove impurities and dry the waste non-woven fabrics;

[0009] Step 2: Adopt a design in which multiple crushing rollers are engaged with stirring blocks to rotate and crush the waste non-woven fabrics;

[0010] Step 3: Set a return conveyor belt with grabbing blocks to send the insufficiently crushed waste materials back to the stirring area for reprocessing;

[0011] Step 4: Add a coagulant to the crushed non-woven fabrics and drain the water to form fiber sheets;

[0012] Step 5: Compress and dehydrate the obtained fiber sheets, then melt them at high temperature and remanufacture them into fibers through a spinneret.

[0013] Preferably, the surface of the stirring blocks in Step 2 increases friction, which can effectively disperse large fiber masses and ensure uniform crushing.

[0014] Preferably, in Step 3, the insufficiently crushed waste materials are sent back to the stirring area for reprocessing to improve the fineness of the fibers.

[0015] Preferably, in Step 4, the coagulant strengthens the fiber binding force, making the strength of the finished product close to that of the raw material and suitable for producing industrial padding materials or building sound insulation materials.

[0016] Preferably, in step five, the melted fiber sheet is re-formed into fibers through a spinneret for producing low-weight non-woven fabrics or filling cotton.

[0017] (3) Beneficial effects

[0018] Compared with the prior art, the present invention provides a method for recycling nonwoven fabrics, which has the following beneficial effects:

[0019] 1. The present invention cleans, removes impurities and dries waste non-woven fabrics, adopts multiple crushing rollers to mesh with stirring blocks and rotate to crush non-woven fabric waste, which can effectively disperse large pieces of fiber and ensure uniform crushing. A return conveyor belt with grab blocks is provided to return the insufficiently crushed waste to the stirring zone for further processing to improve the fiber fineness. A coagulant is added to the crushed non-woven fabric, and drainage is used to form fiber sheets, so that the strength of the finished product is close to that of the original material, which is suitable for the production of industrial mats or building sound insulation materials. The prepared fiber sheets are compressed and dehydrated, and then melted at high temperature and remade into fibers through a spinneret, and then remade into non-woven fabric, thereby having the function of converting waste into high-value products and reducing environmental pollution.

[0020] 2. The present invention reconstitutes the melted fiber sheet into fibers through a spinneret for producing low-weight non-woven fabrics or filling cotton. DETAILED DESCRIPTION

[0021] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] The present invention relates to a method for recycling nonwoven fabrics, comprising the following steps:

[0023] Step 1: Wash, remove impurities and dry the waste non-woven fabric;

[0024] Step 2: Multiple crushing rollers are meshed with stirring blocks to crush the non-woven waste through rotation. The surface of the stirring block increases friction, which can effectively disperse large pieces of fiber and ensure uniform crushing.

[0025] A rotating roller and a needle brush are installed at the bottom of the crushing roller to clean the fiber debris entangled on the roller head surface in real time to avoid blockage and extend the life of the equipment. A dust collection system is also set up to absorb the dust generated during the processing.

[0026] Step 3: Set up a return conveyor belt with a grab block to send the insufficiently crushed waste back to the mixing area for further processing to improve the fiber fineness;

[0027] Step 4: Add a coagulant to the shredded non-woven fabric, drain the water to form a fiber sheet, and strengthen the fiber bonding force through the coagulant, so that the strength of the finished product is close to that of the raw material, suitable for producing industrial cushion materials or building sound insulation materials;

[0028] Step 5: Compress and dehydrate the obtained fiber sheet, and then through high-temperature melting, remanufacture the fiber through a spinneret for producing low-gram non-woven fabric or filling cotton.

[0029] The waste materials can be transformed into high-value products, such as:

[0030] In the construction field: used as sound insulation materials or waterproof layers;

[0031] In the agricultural field: made into soil moisture-keeping covering cloth or planting covers;

[0032] Daily necessities: transformed into eco-friendly bags, storage bags, etc.

[0033] Enterprises establish a closed-loop supply chain through the recycling system to promote sustainable development. Mechanical recycling can shred and reprocess waste materials into new non-woven fabrics, reduce the dependence on petroleum-based raw materials, and the cost of recycled fibers is lower than that of virgin fibers.

[0034] The beneficial effects of the present invention are as follows: The present invention cleans, removes impurities, and dries waste non-woven fabrics, uses multiple crushing rollers and stirring blocks to rotate and crush waste non-woven fabric materials meshingly, can effectively disperse large pieces of fibers, ensure uniform crushing, and through the setting of a return conveyor belt with grabbing blocks, send the waste materials that are not fully crushed back to the stirring area for reprocessing to improve the fiber fineness. Add a coagulant to the shredded non-woven fabric, drain the water to form a fiber sheet, so that the strength of the finished product is close to that of the raw material, suitable for producing industrial cushion materials or building sound insulation materials. Compress and dehydrate the obtained fiber sheet, and then through high-temperature melting, remanufacture the fiber through a spinneret, waiting to be remanufactured into non-woven fabric, thereby having the advantages that waste materials can be transformed into high-value products and environmental pollution can be reduced.

[0035] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for reusing non-woven fabrics, characterized in that, It includes the following steps: Step 1: Clean, remove impurities and dry the waste non-woven fabric; Step 2: Adopt the meshing design of multiple crushing rollers and stirring blocks to rotate and crush the waste non-woven fabric; Step 3: Set up a return conveyor belt with grabbing blocks to send the insufficiently crushed waste back to the stirring area for reprocessing; Step 4: Add a coagulant to the crushed non-woven fabric and drain the water to form a fiber sheet; Step 5: Compress and dehydrate the obtained fiber sheet, then melt it at high temperature and remanufacture it into fibers through a spinneret.

2. The method for recycling non-woven fabrics according to claim 1, characterized in that: The surface of the stirring block in Step 2 increases friction, which can effectively disperse large fibers and ensure uniform crushing.

3. A method for recycling non-woven fabrics according to claim 1, characterized in that: In Step 3, the insufficiently crushed waste is sent back to the stirring area for reprocessing to improve the fiber fineness.

4. A method for reusing non-woven fabrics according to claim 1, characterized in that: In Step 4, the coagulant strengthens the fiber binding force, making the strength of the finished product close to that of the raw material, suitable for producing industrial padding materials or building sound insulation materials.

5. A method for reusing non-woven fabrics according to claim 1, characterized in that: In Step 5, the melted fiber sheet is remanufactured into fibers through a spinneret, which is used to produce low-gram-weight non-woven fabrics or filling cotton.