Processing method of active carbon electrostatic cotton composite non-woven fabric folded filter material

Abstract

The invention relates to the related field of filter materials, in particular to a processing method of an activated carbon electrostatic cotton composite non-woven fabric folded filter material, which comprises the following steps: compounding a PP electrostatic cotton non-woven fabric, activated carbon and a double-component spun-bonded coarse denier non-woven fabric through powder scattering, mixing a certain proportion of activated carbon material in the middle of a composite layer, and utilizing the efficient adsorption capacity of PP electrostatic cotton, so that the filter material can be folded. The iodine value of the middle layer activated carbon material is 900-1100, the adsorption capacity is fully guaranteed, the two-component filament spun-bonded provides certain elastic recovery after compounding, the product can be conveniently folded and used, meanwhile, the characteristics of several composite materials are fully exerted, the characteristics of high efficiency, low resistance, energy saving and the like of the filtering material are achieved, and the filtering material is particularly suitable for filtering treatment of indoor air.

Description

Technical Field

[0001] The present invention relates to the field of filter materials, and specifically to a processing method for a pleated filter material of activated carbon electrostatic cotton composite non-woven fabric. Background Art

[0002] In recent years, with the development and progress of environmental protection science and technology, people have paid more and more attention to the indoor environment. Commonly used indoor filters and air conditioners, etc. Among them, the air filter is an important component in the air conditioning system. Its working principle is to filter harmful substances such as dust, bacteria, and viruses in the air to provide clean and healthy indoor air. According to the filtration effect and usage scenarios, air filters can be divided into three types: primary filters, intermediate filters, and high-efficiency filters. 1. Primary filters: mainly used to filter large particles in the air, such as dust, fine sand, etc. Primary filters are usually made of fiber fabrics or synthetic fiber materials, and their filtration accuracy is relatively low. Generally, they are used in places where the air cleanliness requirements are not high, such as processing workshops. 2. Intermediate filters: mainly used to filter fine particles in the air, such as pollen, dust, etc. Intermediate filters are usually made of glass fiber or synthetic fiber materials, and their filtration accuracy is relatively high. They are suitable for some places with relatively high air cleanliness requirements, such as offices, shopping malls, etc. 3. High-efficiency filters: mainly used to filter tiny particles in the air, such as bacteria, viruses, etc. High-efficiency filters are usually made of glass fiber or synthetic fiber materials, and their filtration accuracy is very high. They can filter particles with a diameter less than 0.3 microns and are suitable for some places with extremely high air cleanliness requirements, such as operating rooms, laboratories, etc.

[0003] Filtration efficiency and filtration accuracy are two evaluation indicators of indoor filters. People often need filter materials with high efficiency and low resistance. This requires full combination of the effects of static electricity, adsorption, high surface area filtration, etc. during the filtration process. In response to the above requirements, a processing method for a pleated filter material of activated carbon electrostatic cotton composite non-woven fabric is designed. Summary of the Invention

[0004] The purpose of the present invention is to provide a processing method for a pleated filter material of activated carbon electrostatic cotton composite non-woven fabric to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A processing method for a pleated filter material of activated carbon electrostatic cotton composite non-woven fabric, comprising the following steps:

[0006] Step S1, provide PP electrostatic cotton non-woven fabric, activated carbon powder, PP / PE bicomponent thick denier spunbond non-woven fabric, and EVA hot melt powder;

[0007] Step S2, mix the activated carbon powder and the EVA hot melt powder in a ratio of 7:3 to obtain a mixed powder;

[0008] Step S3: Use a vibrating powder sprinkler to evenly sprinkle the mixed powder onto the PP / PE bicomponent thick-denier spunbond non-woven fabric to form a powder-sprinkled non-woven fabric;

[0009] Step S4: Heat-treat the powder-sprinkled non-woven fabric through an oven. The EVA hot-melt powder melts in the oven. After reaching the preset temperature, press and laminate the powder-sprinkled non-woven fabric with the PP electrostatic cotton non-woven fabric at the outlet to form an activated carbon electrostatic cotton composite non-woven fabric;

[0010] Step S5: Unroll, slit, and package the obtained activated carbon electrostatic cotton composite non-woven fabric according to a fixed length to prepare an activated carbon electrostatic cotton composite non-woven fabric folding filter material.

[0011] Preferably, in step S1, the grammage of the PP electrostatic cotton non-woven fabric is 80 - 100 g / m², the activated carbon powder is 60 - 80 mesh, the grammage of the PP / PE bicomponent thick-denier spunbond non-woven fabric is 60 g / m², and the EVA hot-melt powder is 80 mesh.

[0012] Preferably, in step S1, the iodine value of the activated carbon powder is 900 - 1100.

[0013] Preferably, the specification of the mixed powder obtained in step S2 is 100 - 150 g / m².

[0014] Preferably, in step S3, when using a vibrating powder sprinkler to evenly sprinkle the mixed powder onto the PP / PE bicomponent thick-denier spunbond non-woven fabric, the specific steps are as follows:

[0015] Step S3.1: Preparation work: Ensure that the vibrating powder sprinkler has been cleaned and the machine equipment is in good working condition. Calibrate the flow rate and vibration frequency of the vibrating powder sprinkler;

[0016] Step S3.2: Preparation of the mixed powder: Fill the hopper of the vibrating powder sprinkler with the pre-mixed activated carbon powder and EVA hot-melt powder in a ratio of 7:3, and conduct a small-scale trial sprinkle to enable the mixed powder to be evenly released;

[0017] Step S3.3: Place the non-woven fabric: Lay the PP / PE bicomponent thick-denier spunbond non-woven fabric on the conveyor belt or a suitable working surface, and adjust the tension to a suitable level to make the fabric flat and without wrinkles;

[0018] Step S3.4: Start the powder sprinkler: Turn on the vibrating powder sprinkler, adjust it to the appropriate vibration frequency and conveying speed, and start the powder sprinkling process to make the mixed powder evenly distributed and completely cover the surface of the spunbond non-woven fabric;

[0019] Step S3.5: Inspection and adjustment: During the powder sprinkling process, closely monitor the distribution of the mixed powder. When necessary, adjust the vibration amplitude or the conveyor belt speed to ensure even spreading;

[0020] Step S3.6: Collect redundant powder: After powder spreading is completed, collect the redundant powder that has rolled down or failed to adhere, and recycle it to reduce waste;

[0021] Step S3.7: Subsequent treatment: Feed the non-woven fabric after powder spreading into an oven for the next heating and melting treatment to complete the composite process.

[0022] Preferably, the heating temperature of the oven in step S4 is set to increase in stages, specifically 110°C, 130°C, and 150°C, and the speed of the oven is 10 meters per minute.

[0023] Preferably, in step S5, the gram weight of the activated carbon electrostatic cotton composite non-woven fabric pleated filter material is 260 grams per square meter, the filtration air resistance is greater than 850 L / mm.min, and the filtration efficiency for 0.3-micron particles is 99.9%.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] Through hot melt composite, the present invention realizes the composite structure of electrostatic non-woven fabric and bicomponent non-woven fabric. The intermediate layer contains activated carbon powder, which can effectively adsorb gases such as formaldehyde. The bicomponent spunbond on the surface layer is convenient for providing stiffness and facilitating pleating treatment; as a flexible material, the present invention can adapt to different concrete building structures and realize long-term moisture conservation for surface enhancement. Brief Description of the Drawings

[0026] Figure 1 It is a schematic structural diagram of the method flow of the present invention. Detailed Embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Please refer to Figure 1, the present invention provides a technical solution: a processing method for an activated carbon electrostatic cotton composite non-woven fabric discount filter material, comprising the following steps:

[0030] Step S1, provide PP electrostatic cotton non-woven fabric, activated carbon powder, PP / PE bicomponent thick denier spunbond non-woven fabric, and EVA hot melt powder;

[0031] Step S2, mix the activated carbon powder and the EVA hot melt powder in a ratio of 7:3 to obtain a mixed powder;

[0032] Step S3, use a vibrating powder sprinkling machine to evenly sprinkle the mixed powder onto the PP / PE bicomponent thick denier spunbond non-woven fabric to form a powder-sprinkled non-woven fabric;

[0033] Step S4, heat-treat the powder-sprinkled non-woven fabric through an oven. The EVA hot melt powder melts in the oven. After reaching the preset temperature, press and laminate the powder-sprinkled non-woven fabric and the PP electrostatic cotton non-woven fabric at the outlet to form an activated carbon electrostatic cotton composite non-woven fabric;

[0034] Step S5, unwind, slit, and package the obtained activated carbon electrostatic cotton composite non-woven fabric in a fixed length to prepare an activated carbon electrostatic cotton composite non-woven fabric discount filter material.

[0035] Further, in step S1, the gram weight of the PP electrostatic cotton non-woven fabric is 80-100 g / m², the activated carbon powder is 60-80 mesh, the gram weight of the PP / PE bicomponent thick denier spunbond non-woven fabric is 60 g / m², and the EVA hot melt powder is 80 mesh.

[0036] Further, in step S1, the iodine value of the activated carbon powder is 900-1100.

[0037] Further, the specification of the mixed powder obtained in step S2 is 100-150 g / m².

[0038] Further, the specific steps of using a vibrating powder sprinkling machine to evenly sprinkle the mixed powder onto the PP / PE bicomponent thick denier spunbond non-woven fabric in step S3 are as follows:

[0039] Step S3.1, preparation work: ensure that the vibrating powder sprinkling machine has been cleaned, the machine equipment is in good working condition, and calibrate the flow rate and vibration frequency of the vibrating powder sprinkling machine;

[0040] Step S3.2, preparation of the mixed powder: load the pre-mixed activated carbon powder and EVA hot melt powder in a ratio of 7:3 into the hopper of the vibrating powder sprinkling machine, and conduct a small-scale trial sprinkling to enable the mixed powder to be evenly released;

[0041] Step S3.3, Place the non-woven fabric: Lay the PP / PE bicomponent thick-denier spunbond non-woven fabric on the conveyor belt or a suitable working surface, and adjust the tension to a suitable level to make the fabric flat and free of wrinkles.

[0042] Step S3.4, Start the powder sprinkler: Turn on the vibrating powder sprinkler, adjust it to a suitable vibration frequency and conveying speed, and start the powder sprinkling process to evenly distribute the mixed powder and completely cover the surface of the spunbond non-woven fabric.

[0043] Step S3.5, Check and adjust: During the powder sprinkling process, closely monitor the distribution of the mixed powder. If necessary, adjust the vibration amplitude or the conveyor belt speed to ensure uniform sprinkling.

[0044] Step S3.6, Collect the excess powder: After the powder sprinkling is completed, collect the excess powder that has rolled off or failed to adhere, and recycle it to reduce waste.

[0045] Step S3.7, Subsequent treatment: Send the powder-sprinkled non-woven fabric into the oven for the next heating and melting treatment to complete the composite process.

[0046] Further, in step S4, the heating temperature of the oven is set to increase in stages, specifically 110°C, 130°C, and 150°C, and the speed of the oven is 10 meters per minute.

[0047] Further, in step S5, the gram weight of the activated carbon electrostatic cotton composite non-woven fabric pleated filter material is 260 grams per square meter, the filtration air resistance is greater than 850 L / mm.min, and the filtration efficiency for 0.3-micron particles is 99.9%.

[0048] In the present invention, the PP electrostatic cotton non-woven fabric is compounded with activated carbon and the bicomponent spunbond thick-denier non-woven fabric by powder sprinkling. A certain proportion of activated carbon material is mixed in the composite layer. Utilizing the high-efficiency adsorption capacity of the PP electrostatic cotton, the iodine value of the activated carbon material in the middle layer is 900 - 1100, which fully ensures the adsorption capacity. The bicomponent filament spunbond provides a certain elastic recovery after compounding, facilitating the use of the product by folding. At the same time, the present invention gives full play to the characteristics of several composite materials, achieving the characteristics of high efficiency, low resistance, and energy saving of the filter material, and is particularly suitable for the filtration treatment of indoor air.

[0049] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art 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 processing method of a pleated filter material made of activated carbon electrostatic cotton composite non-woven fabric, characterized in that, It includes the following steps: Step S1: Provide PP electrostatic cotton non-woven fabric, activated carbon powder, PP / PE bicomponent thick-denier spunbond non-woven fabric, and EVA hot melt powder; Step S2: Mix the activated carbon powder and the EVA hot melt powder in a ratio of 7:3 to obtain a mixed powder; Step S3: Use a vibrating powder sprinkler to evenly sprinkle the mixed powder onto the PP / PE bicomponent thick-denier spunbond non-woven fabric to form a powder-sprinkled non-woven fabric; Step S4: Heat-treat the powder-sprinkled non-woven fabric through an oven. The EVA hot melt powder melts in the oven. After reaching the preset temperature, press and laminate the powder-sprinkled non-woven fabric and the PP electrostatic cotton non-woven fabric at the outlet to form an activated carbon electrostatic cotton composite non-woven fabric; Step S5: Unroll, slit, and package the obtained activated carbon electrostatic cotton composite non-woven fabric in a fixed length to prepare an activated carbon electrostatic cotton composite non-woven fabric pleated filter material.

2. The processing method of an activated carbon electrostatic cotton composite non-woven fabric folding filter material according to claim 1, characterized in that: In the said Step S1, the gram weight of the PP electrostatic cotton non-woven fabric is 80 - 100 g / m², the activated carbon powder is 60 - 80 mesh, the gram weight of the PP / PE bicomponent thick-denier spunbond non-woven fabric is 60 g / m², and the EVA hot melt powder is 80 mesh.

3. The processing method of a folded filter material of activated carbon electrostatic cotton composite non-woven fabric according to claim 1, characterized in that: In the said Step S1, the iodine value of the activated carbon powder is 900 - 1100.

4. The processing method of a folded filter material of activated carbon electrostatic cotton composite non-woven fabric according to claim 1, characterized in that: The specification of the mixed powder obtained in the said Step S2 is 100 - 150 g / m².

5. The processing method of a folded filter material of activated carbon electrostatic cotton composite non-woven fabric according to claim 1, characterized in that: In the said Step S3, using a vibrating powder sprinkler to evenly sprinkle the mixed powder onto the PP / PE bicomponent thick-denier spunbond non-woven fabric, the specific steps are as follows: Step S3.1: Preparation work: Ensure that the vibrating powder sprinkler has been cleaned, the machine equipment is in good working condition, and calibrate the flow rate and vibration frequency of the vibrating powder sprinkler; Step S3.2: Preparation of the mixed powder: Fill the pre-mixed activated carbon powder and EVA hot melt powder in a ratio of 7:3 into the hopper of the vibrating powder sprinkler, and conduct a small-scale trial sprinkle to enable the mixed powder to be evenly released; Step S3.3: Place the non-woven fabric: Lay the PP / PE bicomponent thick-denier spunbond non-woven fabric on the conveyor belt or a suitable working surface, adjust to a suitable tension to make the fabric flat and without wrinkles; Step S3.4: Start the powder sprinkler: Turn on the vibrating powder sprinkler, adjust to a suitable vibration frequency and conveying speed, start the powder sprinkling process, and make the mixed powder evenly distributed and completely cover the surface of the spunbond non-woven fabric; Step S3.5: Inspection and adjustment: During the powder sprinkling process, closely monitor the distribution of the mixed powder, and adjust the vibration amplitude or conveyor belt speed if necessary to ensure even spreading; Step S3.6: Collect the excess powder: After the powder sprinkling is completed, collect the excess powder that has rolled off or is not adhered, and recycle it to reduce waste; Step S3.7: Follow-up treatment: Send the powder-sprinkled non-woven fabric into the oven for the next heating and melting treatment to complete the lamination process.

6. The processing method of a pleated filter material made of activated carbon electrostatic cotton composite non-woven fabric according to claim 1, characterized in that: In the said Step S4, the heating temperature of the oven is set for stepwise heating, specifically 110°C, 130°C, 150°C, and the speed of the oven is 10 m / min.

7. The processing method of a discounted filter material made of activated carbon electrostatic cotton composite non-woven fabric according to claim 1, characterized in that: In the said Step S5, the gram weight of the activated carbon electrostatic cotton composite non-woven fabric pleated filter material is 260 g / m², the filtration air resistance is greater than 850 L / mm.min, and the filtration efficiency for 0.3-micron particles is 99.9%.

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