Membrane material drying device and drying process
By combining the use of a squeegee roller and a hot air duct, the problems of wrinkles and deformation of membrane materials during the drying process are solved, achieving efficient and smooth drying of membrane materials.
Patent Information
- Application Number
- CN202511755736.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-27
- Publication Date
- 2026-01-09
AI Technical Summary
In existing technologies, flexible membrane materials with a certain degree of shrinkage are prone to wrinkles, curling, and uneven shrinkage during the drying process, leading to deformation.
A membrane material drying device including a first hot roller drying component and a hot air drying component is used. The water is scraped off by the squeegee roller, and the hydrophilic and breathable material absorbs the moisture. Combined with the synergistic effect of the flattening roller and the hot air pipe, the membrane material is kept in a suspended state at the dry-wet threshold to prevent deformation.
It effectively removes moisture from the membrane material, preventing wrinkles and deformation, and ensuring the smoothness and efficient drying of the membrane material.
Smart Images
Figure CN121297400A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of film material production, and particularly relates to a film material drying device and drying process. BACKGROUND
[0002] After the film material is cleaned, the film material needs to be dried. The existing drying methods for the film material are mainly tunnel furnace drying and roller contact drying. When the film material is flexible and has certain shrinkage, such as high porosity biaxially oriented PP film, PTFE film, etc., the film surface and the inside of the film holes are full of water before drying. During the drying process, the film material is prone to wrinkling, curling, uneven shrinkage, etc., so that the film material is prone to deformation.
[0003] Therefore, it is necessary to develop a film material drying device and drying process. SUMMARY
[0004] The present application relates to the technical field of film material production, and particularly relates to a film material drying device and drying process.
[0005] The first application object of the present application is to provide a film material drying device.
[0006] The second application object of the present application is to provide a film material drying process.
[0007] To achieve the above-mentioned first application object, the present application provides a film material drying device, comprising a first heat roller drying assembly and a hot air drying assembly. The first heat roller drying assembly comprises a first flattening roller, a first heat roller and a water scraping roller. The surface of the first heat roller is coated with 3-5 layers of hydrophilic breathable material with a thickness of 100-200 mu m. The surface temperature of the first heat roller is 130-140 DEG C, and the outer surface temperature of the hydrophilic breathable material is 90-110 DEG C. The water scraping roller contacts and scrapes off the floating water on the first surface of the film material, and the moisture on the second surface of the film material is adsorbed by the hydrophilic breathable material. The hot air drying assembly comprises a second flattening roller and a third flattening roller. A first hot air pipe and a second hot air pipe are arranged between the second flattening roller and the third flattening roller. The hot air of the first hot air pipe blows to the first surface of the film material, and the hot air of the second hot air pipe blows to the second surface of the film material. The roller spacing of the second flattening roller and the third flattening roller is 0.5-2 m, and the dry-wet critical point of the film material is located between the second flattening roller and the third flattening roller.
[0008] Preferably, the film material passes through the gap formed by the water scraping roller and the first heat roller. The second surface of the film material covers at least half of the roller surface of the first hot roller.
[0009] Preferably, the first displacement adjustment assembly drives the second flattening roller to move forward and backward, and the second displacement adjustment assembly drives the third flattening roller to move forward and backward. The height difference between the shaft center of the second flattening roller and the shaft center of the third flattening roller is 20-30 cm.
[0010] Preferably, the shaft center of the second flattening roller is lower than the shaft center of the third flattening roller.
[0011] Preferably, the first hot air pipe is provided with a long and narrow first air outlet, and the included angle between the blowing direction of the first air outlet and the horizontal plane is 30-45°. The second hot air pipe is provided with a long and narrow second air outlet, and the included angle between the blowing direction of the second air outlet and the horizontal plane is 30-45°.
[0012] Preferably, the first hot air pipe and the second hot air pipe are both installed on the second displacement adjustment assembly.
[0013] Preferably, at least one set of second hot roller drying assembly is further included. The second hot roller drying assembly includes a fourth flattening roller and a second hot roller.
[0014] Preferably, the fourth flattening roller is at the same height as the first flattening roller, and the second hot roller is at the same height as the first hot roller.
[0015] Preferably, the first flattening roller, the second flattening roller, the third flattening roller and the fourth flattening roller are all rubber strip type flattening rollers.
[0016] Based on the same inventive principle, in order to achieve the above-mentioned second invention purpose, the present application provides a film material drying process, including the following steps: Step S1: The squeegee roller contacts and wipes off the water on the first surface of the film material in the flattened state; Step S2: The first hot roller coated with 3-5 layers of hydrophilic breathable material with a thickness of 100-200 μm contacts and absorbs the moisture on the second surface of the film material; Step S3: The first hot air pipe and the second hot air pipe blow the first surface and the second surface of the film material in the flattened state respectively, and the dry-wet critical point of the film material is in a suspended state.
[0017] Compared with the prior art, the present application has the following beneficial effects: The first surface of the film material is first scraped by a water scraping roller to remove most of the water, the second surface of the film material is absorbed and heated to dry by a first hot roller of 3-5 layers of hydrophilic breathable material with a thickness of 100-200 μm, most of the water of the film material is removed by the first hot roller drying assembly; under the flattening of the second flattening roller and the third flattening roller, the remaining water of the film material is blown dry by the first hot air pipe and the second hot air pipe, in order to effectively prevent the film material from wrinkling or deforming, the dry-wet critical point of the film material is located between the second flattening roller and the third flattening roller, that is, to ensure that the dry-wet critical point of the film material is in a suspended state (neither contacts the second flattening roller nor contacts the third flattening roller). BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is a schematic diagram of the film material drying device of the present application.
[0019] Figure 2 It is a schematic diagram of the first hot roller of the present application.
[0020] Figure 3 It is a schematic diagram of the film material drying device of the present application.
[0021] Figure 4 It is a schematic diagram of the first flattening roller of the present application.
[0022] Figure 5 It is a schematic diagram of the first displacement adjustment assembly or the second displacement adjustment assembly of the present application.
[0023] Figure 6 It is a schematic diagram of the film material drying process of the present application.
[0024] 1, first hot roller drying assembly; 11, first flattening roller; 12, first hot roller; 121, hydrophilic breathable material; 13, water scraping roller; 2, hot air drying assembly; 21, second flattening roller; 22, third flattening roller; 23, first hot air pipe; 24, second hot air pipe; 3, film material; 31, first surface; 32, second surface; 33, dry-wet critical point; 4, first displacement adjustment assembly; 5, second displacement adjustment assembly; 51, base; 52, sliding block; 53, screw rod; 6, second hot roller drying assembly; 61, fourth flattening roller; 62, second hot roller. DETAILED DESCRIPTION
[0025] The present application will be described in detail below in conjunction with the embodiments shown in the drawings, but it should be noted that these embodiments are not a limitation on the present application, and equivalent transformations or substitutions of function, method, or structure made by those skilled in the art based on these embodiments are within the scope of protection of the present application.
[0026] In the description of the present application, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.
[0027] The specific implementation process of the present application is described below through multiple embodiments. Embodiment one
[0028] The embodiment discloses a film material drying device (hereinafter referred to as a drying device), which comprises a first hot roller drying assembly 1 and a hot air drying assembly 2. The first hot roller drying assembly 1 comprises a first flattening roller 11, a first hot roller 12 and a water scraping roller 13. The surface of the first hot roller 12 is coated with 3-5 layers of hydrophilic breathable material 121 with a thickness of 100-200 μm. The total thickness of the 3-5 layers of hydrophilic breathable material 121 is 0.3-1 mm. The surface temperature of the first hot roller 12 is 130-140 DEG C. The outer surface temperature of the hydrophilic breathable material 121 is 90-110 DEG C. The outer surface temperature of the hydrophilic breathable material 121 is related to the water content of the film material 3. When the water content of the film material 3 is high, the outer surface temperature of the hydrophilic breathable material 121 is low (such as 90-100 DEG C). When the water content of the film material 3 is low, the outer surface temperature of the hydrophilic breathable material 121 is high (such as 100-110 DEG C). The water scraping roller 13 does not rotate. The diameter of the water scraping roller 13 is much smaller than the diameter of the first hot roller 12. The diameter of the water scraping roller 13 is not more than 3 cm. The water scraping roller 13 contacts and scrapes off the floating water on the first surface 31 of the film material 3. The moisture on the second surface 32 of the film material 3 is adsorbed by the hydrophilic breathable material 121. The moisture adsorbed by the hydrophilic breathable material 121 is evaporated by the first hot roller 12. The hot air drying assembly 2 comprises a second flattening roller 21 and a third flattening roller 22. A first hot air pipe 23 and a second hot air pipe 24 are arranged between the second flattening roller 21 and the third flattening roller 22. The hot air of the first hot air pipe 23 blows towards the first surface 31 of the film material. The hot air of the second hot air pipe 24 blows towards the second surface 32 of the film material. The distance between the second flattening roller 21 and the third flattening roller 22 is 0.5-2 m. The dry-wet critical point 33 of the film material 3 is located between the second flattening roller 21 and the third flattening roller 22. The first hot roller 12 is located between the first flattening roller 11 and the second flattening roller 21, so that the film material 3 is in a flattened state during the whole process of contacting the first hot roller 12, which plays an important guarantee role in preventing the film material from wrinkling and deforming.
[0029] Specifically, the film material 3 of the present embodiment is preferably a film material with micropores of 50-120 μm; a film material with a thickness of less than 50 μm cannot generally withstand the resistance generated by the first hot roller drying assembly 1 and the hot air drying assembly 2; the first hot roller drying assembly 1 has a first flattening roller 11, a first hot roller 12, and a squeegee roller 13, the squeegee roller 13 does not rotate, the film material 3 passes through the gap formed between the surface of the squeegee roller 13 and the surface of the first hot roller 12, the gap can ensure smooth passage of the film material 3, for example, the gap is slightly larger than the thickness of the film material 3, the first flattening roller 11 ensures that the film material 3 is wiped by the squeegee roller 13 in a flattened state and passes through the first hot roller 12 in a flattened state, the second surface 32 of the film material 3 covers at least half of the roller surface of the first hot roller 12, ensuring the contact area of the film material 3 with the first hot roller 12, and at the same time, under the action of the 3-5 layers of hydrophilic and breathable material 121 with a thickness of 100-200 μm, the moisture of the film material 3 can be absorbed to the hydrophilic and breathable material 121 while the film material 3 is heated; under the action of the hydrophilic and breathable material 121, even if the surface temperature of the first hot roller 12 is 130-140℃, the outer surface temperature of the hydrophilic and breathable material 121 is only 90-110℃, the moisture of the film material 3 is simultaneously absorbed and dried, and the drying efficiency is high, in the range of 90-110℃, the probability of deformation and wrinkling of the film material 3 is greatly reduced; after the film material 3 passes through the first hot roller drying assembly 1, 70-80% of the moisture is removed; the remaining 20-30% of the moisture is blown away by the hot air through the hot air drying assembly 2, under the flattening of the second flattening roller 21 and the third flattening roller 22, the remaining moisture of the film material 3 is blown dry by the first hot air pipe 23 and the second hot air pipe 24, in order to effectively prevent the film material from wrinkling or deforming, the dry-wet critical point 33 of the film material 3 is located between the second flattening roller 21 and the third flattening roller 22, that is, to ensure that the dry-wet critical point of the film material 3 is in a suspended state (neither contacts the second flattening roller 21 nor contacts the third flattening roller 22); it should be noted that the dry-wet critical point 33 of the film material 3 is the most prone to deformation and wrinkling node, under the condition that the dry-wet critical point 33 is in a suspended state and is flattened, the probability of deformation and wrinkling is greatly reduced, which ensures that the film material 3 is dried efficiently while ensuring the flatness of its surface.
[0030] Referring to Figure 1 , Figure 3 , Figure 4 and Figure 5To improve the adaptability of the drying device, the first displacement adjusting assembly 4 drives the second flattening roller 21 to move forward and backward, and the second displacement adjusting assembly 5 drives the third flattening roller 22 to move forward and backward; the height difference H between the axis of the second flattening roller 21 and the axis of the third flattening roller 22 is 20-30 cm, and the axis of the second flattening roller 21 is lower than the axis of the third flattening roller 22, which can ensure that the film material 3 is in an inclined state between the second flattening roller 21 and the third flattening roller 22, and facilitate the first hot air pipe 23 and the second hot air pipe 24 to blow hot air to the film material 3; the first displacement adjusting assembly 4 and the second displacement adjusting assembly 5 each include a base 51, a sliding block 52, and a lead screw 53, and the two ends of the second flattening roller 21 or the third flattening roller 22 are installed on the sliding block 52 through bearings, and the lead screw 53 is installed on one of the sliding blocks 52, and the lead screw 53 drives the sliding block 52 to move forward and backward with the base 51 as the fulcrum; through the cooperation of the first displacement adjusting assembly 4 and the second displacement adjusting assembly 5, the horizontal distance L between the axis of the second flattening roller 21 and the axis of the third flattening roller 22 is at least 50 cm and at most 200 cm, which can flexibly adjust the suspension length of the film material 3 according to the drying degree of the film material 3, so as to control the dry-wet critical point 33 to be in a suspended state; see Figure 1 , the first hot air pipe 23 is provided with a long and narrow first air outlet, the angle between the blowing direction of the first air outlet and the horizontal plane is 30-45°, and the width of the first air outlet is not less than the width of the film material 3, see Figure 1 for angle a; the second hot air pipe 24 is provided with a long and narrow second air outlet, the angle between the blowing direction of the second air outlet and the horizontal plane is 30-45°, and the width of the second air outlet is not less than the width of the film material 3, see Figure 1 for angle b; the hot air temperature of the first air outlet and the second air outlet is preferably 70-80℃; the first hot air pipe 23 and the second hot air pipe 24 are both installed on the second displacement adjusting assembly 5, and a upper bracket and a lower bracket can be installed on the sliding block 52, the first hot air pipe 23 is installed on the lower bracket, and the second hot air pipe 24 is installed on the upper bracket.
[0031] See Figure 2 , to adapt to the drying efficiency of different film materials 3, the drying device further includes at least one set of second hot roller drying assembly 6 between the first hot roller drying assembly 1 and the hot air drying assembly 2; the second hot roller drying assembly 6 includes a fourth flattening roller 61 and a second hot roller 62, the fourth flattening roller 61 is the same height as the first flattening roller 11, and the second hot roller 62 is the same height as the first hot roller 12; the first flattening roller 11, the second flattening roller 21, the third flattening roller 22, and the fourth flattening roller 61 are all rubber strip flattening rollers, which can flatten ultra-thin film materials 3 during rotation; in the case of the second hot roller drying assembly 6, see Figure 3, the film material 3 is flattened by the flattening roller when entering and leaving the first heating roller 12, the film material 3 is flattened by the flattening roller when entering and leaving the second heating roller 62, and the film material 3 is flattened by the flattening roller before and after being dried by the first hot air pipe 23 and the second hot air pipe 24, effectively preventing the film material 3 from wrinkling and deforming during the drying process. Example Two
[0032] Example Two provides a film material drying process, referring to Figure 6 , comprising the following steps: Step S1: The water scraping roller 13 contacts and scrapes off the floating water on the first surface 31 of the film material 3 in a flattened state; specifically, the film material 3 passes through the gap formed by the water scraping roller 13 and the first heating roller 12, and the first flattening roller 11 ensures that the film material 3 is scraped by the water scraping roller 13 in a flattened state.
[0033] Step S2: The first heating roller coated with 3-5 layers of 100-200 μm thick hydrophilic breathable material contacts and absorbs the moisture on the second surface of the film material; specifically, the film material 3 passes through the first heating roller 12 in a flattened state, and the second surface 32 of the film material 3 covers at least half of the roller surface of the first heating roller 12, ensuring the contact area between the film material 3 and the first heating roller 12, and at the same time, under the action of 3-5 layers of 100-200 μm thick hydrophilic breathable material 121, the moisture of the film material 3 can be absorbed into the hydrophilic breathable material 121 while the film material 3 is heated; under the action of the hydrophilic breathable material 121, even if the surface temperature of the first heating roller 12 is 130-140℃, the outer surface temperature of the hydrophilic breathable material 121 is only 90-110℃, the moisture of the film material 3 is simultaneously absorbed and dried, the drying efficiency is high, in the range of 90-110℃, and the probability of the film material 3 being deformed and wrinkled is greatly reduced even if the film material 3 still contains a certain amount of moisture.
[0034] Step S3: the first hot air pipe and the second hot air pipe blow the first surface and the second surface of the film material in the flattened state respectively, the dry-wet critical point of the film material is in the suspended state, specifically, after the film material 3 passes through the first hot roller drying assembly 1, 70%-80% of the water is removed; the remaining 20%-30% of the water is blown away by the hot air of the hot air drying assembly 2, under the condition of being flattened by the second flattening roller 21 and the third flattening roller 22, the remaining water of the film material 3 is blown dry by the first hot air pipe 23 and the second hot air pipe 24, in order to effectively prevent the film material from wrinkling or deforming, the dry-wet critical point 33 of the film material 3 is located between the second flattening roller 21 and the third flattening roller 22, that is, to ensure that the dry-wet critical point of the film material 3 is in the suspended state; it should be noted that the dry-wet critical point 33 of the film material 3 is the most easily deformed and wrinkled node, under the condition of being in the suspended state and being flattened at the dry-wet critical point 33, the probability of deformation and wrinkling is greatly reduced, which ensures that the film material 3 is dried efficiently while ensuring the flatness of its surface.
[0035] The film material drying process of Example Two adopts the film material drying device described in Example One. The same as Example One, please refer to Example One, which will not be repeated here.
Claims
1. A film material drying apparatus, characterized by, The first hot roller drying assembly and the hot air drying assembly are included. The first hot roller drying assembly includes a first flattening roller, a first hot roller and a water scraping roller, the surface of the first hot roller is coated with 3-5 layers of hydrophilic breathable material with a thickness of 100-200 μm, the surface temperature of the first hot roller is 130-140 ℃, and the outer surface temperature of the hydrophilic breathable material is 90-110 ℃. The water scraping roller contacts and scrapes the floating water on the first surface of the film material, and the moisture on the second surface of the film material is adsorbed by the hydrophilic breathable material. The hot air drying assembly includes a second flattening roller and a third flattening roller, a first hot air pipe and a second hot air pipe are arranged between the second flattening roller and the third flattening roller, the hot air of the first hot air pipe blows to the first surface of the film material, and the hot air of the second hot air pipe blows to the second surface of the film material. The roller spacing of the second flattening roller and the third flattening roller is 0.5-2 m, and the dry-wet critical point of the film material is located between the second flattening roller and the third flattening roller.
2. The film material drying apparatus according to claim 1, wherein The film material passes through the gap formed by the water scraping roller and the first hot roller; The second surface of the film material covers at least half of the roller surface of the first hot roller.
3. The film material drying apparatus according to claim 1, wherein The first displacement adjusting assembly drives the second flattening roller to move forward and backward, and the second displacement adjusting assembly drives the third flattening roller to move forward and backward. The height difference between the shaft center of the second flattening roller and the shaft center of the third flattening roller is 20-30 cm.
4. The film material drying apparatus according to claim 3, wherein The shaft center of the second flattening roller is lower than the shaft center of the third flattening roller.
5. The membrane material drying apparatus of claim 4, wherein The first hot air pipe is provided with a long and narrow first air outlet, and the included angle between the blowing direction of the first air outlet and the horizontal plane is 30-45°. The second hot air pipe is provided with a long and narrow second air outlet, and the included angle between the blowing direction of the second air outlet and the horizontal plane is 30-45°.
6. The membrane material drying apparatus of claim 5, wherein The first hot air pipe and the second hot air pipe are both installed on the second displacement adjusting assembly.
7. The membrane material drying apparatus of any one of claims 1-6, wherein, At least one set of second hot roller drying assembly is also included. The second hot roller drying assembly includes a fourth flattening roller and a second hot roller.
8. The membrane material drying apparatus of claim 7, wherein, The fourth flattening roller is in the same height as the first flattening roller, and the second hot roller is in the same height as the first hot roller.
9. The membrane material drying apparatus of claim 7, wherein, The first flattening roller, the second flattening roller, the third flattening roller and the fourth flattening roller are all rubber strip type flattening rollers.
10. A film material drying process, characterized by, The following steps are included: Step S1: The water scraping roller contacts and scrapes the floating water on the first surface of the film material in a flattened state; Step S2: The first hot roller coated with 3-5 layers of hydrophilic breathable material with a thickness of 100-200 μm contacts and adsorbs the moisture on the second surface of the film material; Step S3: The first hot air pipe and the second hot air pipe blow to the first surface and the second surface of the film material in a flattened state, respectively, and the dry-wet critical point of the film material is in a suspended state.