Viscous separation net and preparation method of viscous separation net

Abstract

The invention discloses a viscous separation net and a preparation method of the viscous separation net, belongs to the technical field of separation nets, and aims at solving the problems that an existing viscous separation net is not uniform in viscosity, short in viscosity keeping time, not firm in combination with a separation net base body and the like. The filter screen comprises a filter screen base body and a viscous layer coated on the surface of the filter screen base body, the filter screen base body is a fiber woven mesh, and the fiber woven mesh is polyester fibers subjected to surface modification treatment; the viscous layer is prepared by mixing a viscous polymer, a tackifier, an antioxidant and a solvent according to a mass ratio. According to the viscous separation net, the model of the viscous separation net is DX-F26D, the fiber woven net subjected to surface modification treatment is selected as a base body, the binding force between the fiber woven net and the viscous layer is enhanced, and the viscous layer is not prone to falling off. Meanwhile, by means of the optimized formula of the viscous layer, the separation net has good viscosity uniformity, long viscosity retention time and excellent oxidation resistance, and small particles and impurities can be stably captured for a long time.

Description

Technical Field

[0001] The present invention belongs to the technical field of separator nets. Specifically, it is a sticky separator net and a preparation method thereof. Background Art

[0002] In many industrial production, environmental protection, and daily life scenarios, a separator net that can effectively block and capture specific particles or impurities is required.

[0003] Traditional separator nets usually rely on physical apertures to screen substances, and the filtering effect is not good for some tiny particles or irregularly shaped impurities. For example, in the field of air purification, dust, pollen, etc. smaller than the aperture of the separator net can still pass through, which cannot meet the high-precision purification requirements; in industrial liquid filtration, some colloidal impurities are difficult to be intercepted by ordinary separator nets.

[0004] To solve these problems, the prior art attempts to add a sticky coating to the separator net, but the existing sticky separator nets have problems such as uneven stickiness, short sticky retention time, and weak bonding with the separator net matrix, resulting in a significant reduction in the actual use effect of the separator net. Therefore, there is an urgent need for a new type of sticky separator net and a preparation method to overcome the above deficiencies of the prior art. Especially for dust-proof areas with high cleanliness requirements such as painting workshops and stamping workshops, how to adsorb suspended particles and sundries such as hair and fibers. Summary of the Invention

[0005] The purpose of the present invention is to provide a sticky separator net, which has the advantages of uniform stickiness, long sticky retention time, and strong bonding with the separator net matrix, and can effectively block and capture tiny particles and impurities. The model of the sticky separator net is DX-F26D. At the same time, the present invention also provides a preparation method for the sticky separator net, which has a simple process, is easy to operate, and is suitable for large-scale production. To achieve the above technical purposes, the technical solutions adopted by the present invention are as follows:

[0006] A sticky separator net includes a separator net matrix and a sticky layer coated on the surface of the separator net matrix. The separator net matrix is a fiber woven net, and the fiber woven net is a polyester fiber that has been surface-modified. The sticky layer is made by mixing a sticky polymer, a tackifier, an antioxidant, and a solvent in a mass ratio of (5 - 10):(1 - 3):(0.5 - 1.5):(15 - 25).

[0007] This product's sticky screen is particularly suitable for dust-proof areas that require a high level of cleanliness, such as paint shops and stamping shops. It can absorb falling dust, causing the dust to adhere to the surface of the product and no longer fly up, thus preventing dust from causing defects. This is especially true for 5-10μm suspended particles and debris such as hair and fibers. The product's sticky layer has high viscosity and leaves no residue when touched. At the same time, the product does not block the airflow during use, nor does it change the direction of the airflow, nor does it affect the pre-designed ventilation of the workshop. The product is anti-static and flame retardant, does not contain substances banned in paint shops, and will not cause defects such as shrinkage holes in the paint. The product can be hung in places without supporting surfaces in the workshop, such as aisles and entrances, to absorb dust and other pollutants, maintain the air cleanliness of the workshop, and prevent pollution.

[0008] The preparation method of the adhesive separator comprises the following steps:

[0009] Step 1: pre-treat the spacer matrix, weave the fiber woven mesh into the spacer matrix, clean the spacer matrix, remove surface impurities, and dry the cleaned spacer matrix at a drying temperature of 60-80°C for 2-4 hours.

[0010] Step 2: Preparation of the viscous layer solution: weigh the viscous polymer, tackifier, antioxidant and solvent according to the mass ratio; add the weighed viscous polymer, tackifier and antioxidant to the solvent, stir for 3-5 hours at a stirring speed of 300-500 rpm to fully mix the ingredients to obtain a viscous layer solution.

[0011] Step three, coating and curing, using a dip coating method to evenly coat the viscous layer solution on the pretreated surface of the separator substrate; curing the coated separator substrate at a temperature of 80-100° C. for 2-3 hours to obtain a viscous separator.

[0012] Compared to existing technologies, the present invention utilizes a surface-modified fiber mesh as its base, enhancing its adhesion to the adhesive layer and making it less susceptible to detachment. Furthermore, the optimized adhesive layer formulation ensures the mesh exhibits excellent adhesive uniformity, a long-lasting adhesive retention, and excellent antioxidant properties, enabling it to stably capture small particles and impurities over extended periods of time. The present invention's adhesive mesh preparation method features clear process steps, simple operation, and easily controllable parameters for each step, making it suitable for large-scale industrial production, helping to reduce production costs and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention can be further illustrated by the non-limiting examples given in the accompanying drawings;

[0014] Figure 1 Schematic diagram of the dip coating process of the present invention;

[0015] Figure 2Schematic diagram of the preparation process flow of the sticky separator net of the present invention; Detailed implementation manners

[0016] In order to enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] As Figure 1 , Figure 2 shown, a sticky separator net includes a separator net matrix and a sticky layer coated on the surface of the separator net matrix. The separator net matrix is a fiber woven net, and the fiber woven net is a polyester fiber subjected to surface modification treatment; the sticky layer is made by mixing a sticky polymer, a tackifier, an antioxidant and a solvent according to a mass ratio of (5-10):(1-3):(0.5-1.5):(15-25).

[0018] The surface modification treatment is to perform surface treatment on the polyester fiber by using plasma treatment technology to introduce hydroxyl active groups on the fiber surface.

[0019] The sticky polymer is one or a mixture of two of acrylate polymers and silicone polymers.

[0020] The tackifier is one or a mixture of two of rosin resin and terpene resin.

[0021] The antioxidant is a hindered phenol antioxidant or a thioester antioxidant.

[0022] The thickness of the sticky layer is 5-20 microns.

[0023] Example 1,

[0024] Preparation of the sticky separator net,

[0025] Step 1: Pretreatment of the separator net matrix,

[0026] Weave the polyester fiber introduced with hydroxyl active groups through plasma treatment into a separator net matrix. Use a mixed solution of deionized water and ethanol with a volume ratio of 2:1 to clean the separator net matrix to remove surface impurities. After cleaning, dry the separator net matrix at a temperature of 70 °C for 3 hours.

[0027] Step 2: Preparation of the sticky layer solution,

[0028] Weigh 8 parts of acrylate polymer, 2 parts of rosin resin, 1 part of hindered phenol antioxidant and 20 parts of solvent according to the mass ratio. Add the weighed acrylate polymer, rosin resin and hindered phenol antioxidant to the solvent, and stir for 4 hours under the condition of a stirring speed of 400 revolutions per minute to fully mix each component to obtain a sticky layer solution.

[0029] Step 3: Coating and curing,

[0030] The viscous layer solution was evenly coated on the surface of the pretreated septum matrix by dip coating method, and the dip coating speed was 8 cm / min. After coating, the septum matrix was cured at 90 °C for 2.5 hours to obtain a viscous septum, and the thickness of the viscous layer was 12 μm at this time.

[0031] Performance testing,

[0032] The viscosity uniformity of the prepared viscous septum was tested. By pasting standard test paper pieces at different positions of the septum, the adhesive force at each position was tested. The result showed that the adhesive force deviation was within ±5%, indicating good viscosity uniformity.

[0033] The viscosity retention time was tested. The viscous septum was exposed to a simulated natural environment (temperature 25 °C, relative humidity 60%). The capture efficiency of standard dust particles was tested at regular intervals. After 3 months of testing, the capture efficiency remained above 90% of the initial value, indicating a long viscosity retention time.

[0034] The bonding strength between the viscous layer and the septum matrix was tested. By using a peel test, the result showed that the viscous layer and the septum matrix were firmly bonded and difficult to peel off.

[0035] Example 2,

[0036] Preparation of viscous septum,

[0037] Step 1: Pretreatment of septum matrix,

[0038] The polyester fiber introduced with carboxyl active groups by plasma treatment was woven into a septum matrix. The septum matrix was cleaned with a mixed solution of deionized water and ethanol with a volume ratio of 1:1 to remove surface impurities. After cleaning, the septum matrix was dried at 60 °C for 4 hours.

[0039] Step 2: Preparation of viscous layer solution,

[0040] Weigh 6 parts of organosilicon polymer, 3 parts of terpene resin, 0.5 part of thioester antioxidant and 18 parts of solvent according to the mass ratio. The weighed organosilicon polymer, terpene resin and thioester antioxidant were added to the solvent and stirred at a stirring speed of 300 rpm for 5 hours to fully mix each component, obtaining a viscous layer solution.

[0041] Step 3: Coating and curing,

[0042] The viscous layer solution was evenly coated on the surface of the pretreated septum matrix by dip coating method, and the dip coating speed was 8 cm / min. After coating, the septum matrix was cured at 90 °C for 2.5 hours to obtain a viscous septum, and the thickness of the viscous layer was 8 μm.

[0043] Performance Test

[0044] Viscosity uniformity test: the adhesion deviation is within ±6%, and the viscosity uniformity is good.

[0045] Viscosity retention time test: under the simulated natural environment (temperature 28°C, relative humidity 50%), after 2.5 months of testing, the capture efficiency for standard dust particles remains above 88% of the initial value, and the viscosity retention time meets the requirements.

[0046] Adhesion test: using the peel test, it shows that the adhesive layer is tightly bonded to the separator matrix and is not easily peeled off.

[0047] Preparation method of the sticky separator, including the following steps:

[0048] Step 1, pretreatment of the separator matrix: weave the fiber woven mesh into the separator matrix, clean the separator matrix to remove surface impurities, and perform a drying treatment on the cleaned separator matrix. The drying temperature is 60 - 80°C, and the drying time is 2 - 4 hours.

[0049] Step 2, preparation of the adhesive layer solution: weigh the sticky polymer, tackifier, antioxidant, and solvent according to the mass ratio; add the weighed sticky polymer, tackifier, and antioxidant to the solvent, and stir for 3 - 5 hours at a stirring speed of 300 - 500 revolutions per minute to fully mix the components and obtain the adhesive layer solution.

[0050] Step 3, coating and curing: use the dip coating method to uniformly coat the adhesive layer solution on the surface of the pretreated separator matrix; cure the coated separator matrix at a temperature of 80 - 100°C for 2 - 3 hours to obtain the sticky separator.

[0051] In Step 1, the cleaning is carried out using a mixed solution of deionized water and ethanol, and the volume ratio of deionized water to ethanol in the mixed solution is (1 - 3):1.

[0052] In Step 3, when using the dip coating method, the dip coating speed is 5 - 10 cm / min.

[0053] In Step 3, the specific process steps of the dip coating method are as follows:

[0054] S1, before carrying out the dip coating operation, it is necessary to ensure that the pretreatment of the separator matrix and the preparation of the adhesive layer solution are completed; the pretreated separator matrix should be clean and dry, and the adhesive layer solution should be evenly mixed;

[0055] S2, pour the prepared adhesive layer solution into a suitable container to ensure that the separator can be completely immersed in the solution;

[0056] S3. Adjust the parameters of the dip coating equipment, and set the dip coating speed to 5 - 10 cm / min; vertically immerse the mesh substrate into the viscous layer solution smoothly and at a constant speed.

[0057] Among them, fix the mesh substrate with a fixture to ensure that it will not shake or deform during the dip coating process. Subsequently, vertically immerse the mesh substrate into the viscous layer solution smoothly and at a constant speed according to the set dip coating speed. During the immersion process, ensure that all parts of the mesh substrate can fully contact the solution to achieve uniform coating.

[0058] S4. After the mesh substrate is completely immersed in the solution, keep it for 1 - 3 minutes to allow the viscous layer solution to fully infiltrate the mesh; then, slowly lift the mesh vertically out of the solution according to the set dip coating speed.

[0059] Among them, the infiltration time can be appropriately adjusted according to the characteristics of the solution and the material of the mesh, generally controlled within 1 - 3 minutes. Slowly lift the mesh vertically out of the solution, so that the excess viscous layer solution will naturally drip back into the container during the lifting process.

[0060] S5. After the coating is completed, transfer the mesh substrate with the viscous layer solution to the curing equipment, and cure it at a temperature of 80 - 100 °C for 2 - 3 hours to make the viscous layer fully dry and cured, and tightly combine with the mesh substrate to finally obtain a viscous mesh.

[0061] Among them, during the curing process, it is necessary to keep the temperature in the curing equipment uniform to avoid uneven curing of the viscous layer caused by local temperature differences.

[0062] The above has introduced in detail the viscous mesh and the preparation method of the viscous mesh provided by the present invention. The description of the specific embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A sticky separator net, comprising a separator net matrix and a sticky layer coated on the surface of the separator net matrix, characterized in that: The spacer matrix is a fiber woven mesh, and the fiber woven mesh is polyester fiber that has undergone surface modification treatment; the adhesive layer is made by mixing a pressure-sensitive polymer, a tackifier, an antioxidant, and a solvent in a mass ratio of (5-10):(1-3):(0.5-1.5):(15-25).

2. The sticky separator grid according to claim 1, characterized in that: The surface modification treatment is to perform surface treatment on the polyester fiber using plasma treatment technology to introduce hydroxyl active groups on the fiber surface.

3. The sticky separator according to claim 2, wherein: The pressure-sensitive polymer is one or a mixture of two of acrylate polymers and silicone polymers.

4. The sticky separator grid according to claim 3, wherein: The tackifier is one or a mixture of two of rosin resin and terpene resin.

5. The sticky separator according to claim 4, wherein: The antioxidant is a hindered phenol antioxidant or a thioester antioxidant.

6. The sticky separator according to claim 5, characterized in that: The thickness of the adhesive layer is 5-20 microns.

7. A method for preparing a sticky spacer grid as described in claim 6, characterized in that, It includes the following steps: Step 1, pretreatment of the spacer matrix: Weave the fiber woven mesh into the spacer matrix, clean the spacer matrix to remove surface impurities, and perform a drying treatment on the cleaned spacer matrix. The drying temperature is 60-80 °C, and the drying time is 2-4 hours. Step 2, preparation of the adhesive layer solution: Weigh the pressure-sensitive polymer, tackifier, antioxidant, and solvent according to the mass ratio; add the weighed pressure-sensitive polymer, tackifier, and antioxidant to the solvent, and stir for 3-5 hours under the condition that the stirring speed is 300-500 revolutions per minute to fully mix the components and obtain the adhesive layer solution. Step 3, coating and curing: Use the dip coating method to uniformly coat the adhesive layer solution on the surface of the pretreated spacer matrix; cure the coated spacer matrix at a temperature of 80-100 °C for 2-3 hours to obtain the adhesive spacer.

8. The method for preparing the adhesive spacer grid according to claim 7, wherein: In Step 1, the cleaning is carried out using a mixed solution of deionized water and ethanol, and the volume ratio of deionized water to ethanol in the mixed solution is (1-3):

1.

9. The method for preparing the sticky spacer according to claim 8, wherein: In Step 3, when using the dip coating method, the dip coating speed is 5-10 cm / min.

10. The method for preparing the sticky separator according to claim 9, wherein: In Step 3, the specific process steps of the dip coating method are as follows: S1, Before performing the dip coating operation, it is necessary to ensure that the pretreatment of the spacer matrix and the preparation of the adhesive layer solution have been completed; the pretreated spacer matrix should be clean and dry, and the adhesive layer solution should be evenly mixed; S2, Pour the prepared adhesive layer solution into a suitable container to ensure that the spacer can be completely immersed in the solution; S3, Adjust the parameters of the dip coating equipment, set the dip coating speed to 5-10 cm / min, and vertically immerse the spacer matrix into the adhesive layer solution smoothly and uniformly; S4, After the spacer matrix is completely immersed in the solution, keep it for 1-3 minutes to allow the adhesive layer solution to fully infiltrate the spacer. Then, slowly lift the spacer vertically from the solution at the set dip coating speed; S5, After the coating is completed, transfer the spacer matrix with the adhesive layer solution to the curing equipment and cure it at a temperature of 80-100 °C for 2-3 hours to make the adhesive layer fully dry and cured and tightly combined with the spacer matrix, and finally obtain the adhesive spacer.

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