A kind of PE non-woven fabric production corona treatment device

Abstract

The utility model discloses a kind of PE non-woven fabric production corona treatment device, including the corona roller of supporting non-woven fabric and the corona treatment machine being set above corona roller, the electrode of corona treatment machine is directly opposite the non-woven fabric setting above corona roller, the both sides of corona roller are provided with the guide roller that is pressed on the non-woven fabric, the downstream of one guide roller is sequentially provided with the support roller that is supported below non-woven fabric, the static electricity removal box that is sleeved on the surface of non-woven fabric and the compression roller that is pressed on the non-woven fabric above;Ion wind stick is installed on the side of static electricity removal box above close to support roller.The utility model directly contacts with non-woven fabric by setting support roller and compression roller, using copper conductive rod and multiple electric brushes and ground copper bar with good conductive effect are guided to ground to eliminate static electricity, mode is simple and direct and cost is extremely low, while cooperate the ion wind stick of intermittent opening, form ion static electricity removal cavity under the action of static electricity removal box, static electricity removal effect is good, effectively reduce cost.

Description

Technical Field

[0001] This utility model relates to the field of nonwoven fabric production technology, specifically to a corona treatment device for PE nonwoven fabric production. Background Technology

[0002] PE nonwoven fabric is a nonwoven material made of polyethylene (PE). PE film and nonwoven fabric are laminated together through various methods such as coating, hot pressing, adhesive spraying, and ultrasonic treatment, creating two or three layers of fabric. This produces products that are soft, breathable, waterproof, wear-resistant, and possess certain tensile and elongation properties. They are commonly used in the production of medical gowns, disposable bed sheets, agricultural covering films, eco-friendly bags, packaging materials, and industrial interior materials.

[0003] In the production process of PE nonwoven fabric, corona treatment is often involved. By corona treatment of PE nonwoven fabric, high-frequency and high-voltage corona discharge is used on the surface of the treated nonwoven fabric to generate low-temperature plasma, causing free radical reactions on the surface of the nonwoven fabric, thereby causing cross-linking of the polymer. Specifically, industrial power conversion boosts to generate high-frequency and high-voltage power, generating corona discharge between electrodes and rollers. Since the medium is air, ozone is formed. When it interacts with the surface of the nonwoven fabric, it generates related free radicals, increasing the polarity of the nonwoven fabric material, thereby increasing the activity of the nonwoven fabric surface and making the nonwoven fabric surface have stronger adhesion, that is, a higher dyne coefficient. This prevents phenomena such as printing color bleeding, weak composite bonding, uneven coating leakage, and failure to print during the production process of nonwoven fabric.

[0004] Corona treatment is not without its advantages. When a large current is applied to the surface of nonwoven fabric during corona treatment, a significant amount of excess charge remains, leading to excessive static electricity that can affect printing and processing. Therefore, environmental humidity should be carefully controlled during corona treatment. If necessary, the humidity can be increased manually, and static electricity can be eliminated using antistatic equipment. However, hydrophobic PE nonwoven fabrics do not perform well in eliminating static electricity under moderate humidity conditions. High humidity can cause equipment rust, product dampness, and other problems, and humidifiers are energy-intensive. Common antistatic equipment uses ion bars, which blow ions onto the nonwoven fabric to eliminate static electricity. This requires continuous power to generate ions and blow air, making it relatively expensive. Therefore, it is necessary to design a low-cost, high-efficiency corona treatment device. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a corona treatment device for PE nonwoven fabric production, which achieves low-cost and efficient removal of a large amount of static electricity remaining on the surface of PE nonwoven fabric caused by corona treatment.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A corona treatment device for PE nonwoven fabric production includes a corona roller supporting the nonwoven fabric and a corona treatment machine disposed above the corona roller. The electrodes of the corona treatment machine are positioned directly above the nonwoven fabric above the corona roller. Guide rollers pressing on the nonwoven fabric are disposed on both sides of the corona roller. Downstream of one of the guide rollers, a support roller supporting the nonwoven fabric below, an antistatic box sleeved on the surface of the nonwoven fabric, and a pressure roller pressing on the nonwoven fabric are sequentially disposed. An ionizing air bar is installed on the side of the static elimination box near the support roller. Both the support roller and the pressure roller are stainless steel rollers. Below the pressure roller and the support roller, there are brushes in contact with them. The brushes are fixed on a conductive rod, and a grounding copper busbar is connected to the conductive rod.

[0007] Preferably, the static elimination box is inclined downward along the nonwoven fabric conveying direction, and the ion air bar is installed vertically downward.

[0008] Preferably, the antistatic box has an open side corresponding to the pressure roller, and the side corresponding to the support roller is only provided with a slot for the nonwoven fabric to pass through.

[0009] Preferably, the support roller is a coarse roller with a diameter of not less than 20 cm, and the pressure roller is a fine roller with a diameter of not more than 3 cm.

[0010] Preferably, the surfaces of the support roller and the pressure roller are uniformly provided with protrusions, and the protrusions are hemispherical copper blocks with a radius of no more than 2 mm.

[0011] Preferably, the conductive rod is a copper rod arranged longitudinally, the length of the conductive rod is greater than the width of the non-woven fabric, and there are multiple brushes and grounding copper busbars, which are equidistantly arranged longitudinally on the conductive rod.

[0012] Preferably, the brush is arranged tangentially along the rotation direction of the pressure roller and the support roller, and the brush below the pressure roller is in contact with the pressure roller and the nonwoven fabric respectively.

[0013] Compared with the prior art, the present invention has the following beneficial effects: This invention uses support rollers and pressure rollers to directly contact the nonwoven fabric, and utilizes copper conductive rods with good conductivity, multiple brushes, and grounding copper busbars to guide grounding and eliminate static electricity. The method is simple, direct, and extremely low-cost. At the same time, it is combined with intermittently activated ion air bars to form an ion-based static elimination chamber under the action of the static elimination box, resulting in good static elimination effect, effectively reducing costs, and being friendly to enterprises for mass production. It achieves the effect of removing a large amount of static electricity remaining on the surface of PE nonwoven fabric caused by corona treatment at a low cost and with high efficiency. Attached Figure Description

[0014] Figure 1This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partial structural diagram of the pressure roller of this utility model at the corresponding position; Figure 3 This is a partial structural diagram of the corresponding position of the support roller of this utility model; Figure 4 This is a partial side view of the structure of the support roller of this utility model.

[0015] In the diagram: 1. Non-woven fabric; 2. Corona roller; 3. Corona treatment machine; 4. Guide roller; 5. Support roller; 6. Static eliminator box; 7. Pressure roller; 8. Ionizing air bar; 9. Brush; 10. Conductive rod; 11. Grounding copper busbar; 12. Bump. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] like Figure 1-4 As shown, this utility model provides a technical solution: a corona treatment device for PE nonwoven fabric production, including a corona roller 2 supporting the nonwoven fabric 1 and a corona treatment machine 3 disposed above the corona roller 2. The electrodes of the corona treatment machine 3 are positioned directly above the nonwoven fabric 1 above the corona roller 2. Guide rollers 4 are disposed on both sides of the corona roller 2, pressing on the nonwoven fabric 1. Downstream of one of the guide rollers 4, a support roller 5 supporting the nonwoven fabric 1 below, an antistatic box 6 sleeved on the surface of the nonwoven fabric 1, and a pressure roller 7 pressing on the nonwoven fabric 1 are disposed in sequence. The nonwoven fabric 1 is conveyed from right to left. Both the support roller 5 and the pressure roller 7 are stainless steel rollers. The support roller 5 is a coarse roller with a diameter of not less than 20 cm, which increases the contact area with the nonwoven fabric 1 and improves the conductivity. The pressure roller 7 is a fine roller with a diameter of not more than 3 cm, which reduces the obstruction to the open end of the static elimination box 6 and avoids affecting the ventilation effect. The surfaces of the support roller 5 and the pressure roller 7 are uniformly provided with protrusions 12. The protrusions 12 are hemispherical copper blocks with a radius of not more than 2 mm. Without damaging the nonwoven fabric 1, the conductivity is further improved on the basis of the support roller 5 and the pressure roller 7 by utilizing the principle of tip discharge. An ionizing bar 8 is installed on the side of the antistatic box 6 near the support roller 5. The power supply of the ionizing bar 8 adopts an intermittent on-off control method that matches the conveying speed of the nonwoven fabric 1 conveyor line. The on-off and off times can be set according to the conveying speed of the nonwoven fabric 1, which effectively reduces energy consumption costs. Below the pressure roller 7 and the support roller 5, there are respectively electric brushes 9 that are in contact with them. The electric brushes 9 are arranged tangentially along the rotation direction of the pressure roller 7 and the support roller 5. The electric brushes 9 below the pressure roller 7 are in contact with the pressure roller 7 and the non-woven fabric 1 respectively. The electric brushes 9 are fixed on the conductive rod 10. The conductive rod 10 is a copper rod arranged longitudinally. The length of the conductive rod 10 is greater than the width of the non-woven fabric 1. A grounding copper busbar 11 is connected to the conductive rod 10. There are multiple electric brushes 9 and grounding copper busbars 11, which are arranged equidistantly along the longitudinal direction on the conductive rod 10. Through multi-point contact, static electricity can be fully and effectively discharged. The static eliminator box 6 is inclined downward along the conveying direction of the nonwoven fabric 1. The side of the static eliminator box 6 corresponding to the pressure roller 7 is open, and the side corresponding to the support roller 5 is only provided with a through groove for the nonwoven fabric 1 to pass through. The ion air bar 8 is installed vertically downward. The static eliminator box 6 forms a static eliminator ion chamber, blowing ion air from top to bottom to fully contact the nonwoven fabric 1 and improve the static eliminator effect. Nonwoven fabric 1 is conveyed from right to left. Support roller 5 and pressure roller 7 are in direct contact with nonwoven fabric 1. Support roller 5 is a coarse roller, which can increase the contact area with nonwoven fabric 1 and improve the conductivity. Ionizing air bar 8 blows air vertically downwards, forming an antistatic ion chamber in antistatic box 6. The ionizing air blown from top to bottom can fully contact nonwoven fabric 1. Pressure roller 7 is a fine roller, which can reduce obstruction to the open end of antistatic box 6 and avoid affecting the ventilation effect. Support roller 5 and pressure roller 7 increase the contact effect with nonwoven fabric 1 through protrusions 12. Without damaging nonwoven fabric 1, the conductivity is further improved by using the principle of tip discharge on the basis of support roller 5 and pressure roller 7. Copper conductive rod 10 with good conductivity and multiple brushes 9 are used for multi-point contact. Multiple grounding copper busbars 11 are used for grounding to eliminate static electricity. The brushes 9 and ionizing air bar 8 work together to achieve the effect of removing a large amount of static electricity remaining on the surface of PE nonwoven fabric 1 caused by corona treatment at low cost and high efficiency.

[0018] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A corona treatment device for PE nonwoven fabric production, comprising a corona roller (2) supporting the nonwoven fabric (1) and a corona treatment machine (3) disposed above the corona roller (2), wherein the electrodes of the corona treatment machine (3) are positioned directly opposite the nonwoven fabric (1) above the corona roller (2), characterized in that: The corona roller (2) is provided with guide rollers (4) pressing on the nonwoven fabric (1) on both sides. Downstream of one of the guide rollers (4) are a support roller (5) supporting the nonwoven fabric (1), an antistatic box (6) sleeved on the surface of the nonwoven fabric (1), and a pressure roller (7) pressing on the nonwoven fabric (1). An ionizing bar (8) is installed on the side of the static eliminator (6) near the support roller (5). The support roller (5) and the pressure roller (7) are both stainless steel rollers. Below the pressure roller (7) and the support roller (5), there are respectively a brush (9) in contact with them. The brush (9) is fixed on the conductive rod (10). A grounding copper busbar (11) is connected to the conductive rod (10).

2. The corona treatment device for PE nonwoven fabric production according to claim 1, characterized in that: The static eliminator box (6) is inclined downward along the conveying direction of the nonwoven fabric (1), and the ion air bar (8) is installed vertically downward.

3. The corona treatment device for PE nonwoven fabric production according to claim 1, characterized in that: The static eliminator box (6) has an open side corresponding to the pressure roller (7), and only a slot is provided on the side corresponding to the support roller (5) for the nonwoven fabric (1) to pass through.

4. The corona treatment device for PE nonwoven fabric production according to claim 1, characterized in that: The support roller (5) is a coarse roller with a diameter of not less than 20 cm, and the pressure roller (7) is a fine roller with a diameter of not more than 3 cm.

5. The corona treatment device for PE nonwoven fabric production according to claim 1, characterized in that: The surfaces of the support roller (5) and the pressure roller (7) are uniformly provided with protrusions (12), and the protrusions (12) are hemispherical copper blocks with a radius of no more than 2 mm.

6. The corona treatment device for PE nonwoven fabric production according to claim 1, characterized in that: The conductive rod (10) is a copper rod arranged longitudinally. The length of the conductive rod (10) is greater than the width of the nonwoven fabric (1). There are multiple brushes (9) and grounding copper busbars (11) arranged longitudinally at equal intervals on the conductive rod (10).

7. The corona treatment device for PE nonwoven fabric production according to claim 1, characterized in that: The brush (9) is arranged tangentially along the rotation of the pressure roller (7) and the support roller (5), and the brush (9) below the pressure roller (7) is in contact with the pressure roller (7) and the nonwoven fabric (1) respectively.

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