Patent Publication Number: US-2023133830-A1

Title: Dust-purifying adhesive layer, dust-purifying film, and dust-purifying film sleeve

Description:
RELATED APPLICATIONS 
     This application claims the benefit of priority to Chinese Patent Application Number 202111301151.7 filed on Nov. 4, 2021 and Chinese Patent Application Number 202122685457.9 filed on Nov. 4, 2021, in the China National Intellectual Property Administration. The entire contents of the above-identified application are hereby incorporated by reference. 
     TECHNICAL FIELD 
     The disclosure relates to the technical field of dust-purifying films, and in particular to a dust-purifying adhesive layer, a dust-purifying film having the functions of dust-purifying and anti-foaming, and a dust-purifying film sleeve. 
     BACKGROUND 
     With the continuous development and progress of the society, smart phones, tablet computers, etc. have been widely used. However, the screens of these products are usually exposed to exterior environment, and can be easily damaged when the device is hit with a strong impact. To prevent such damages to the devices, consumers usually adhere a protective film on the screen to protect the screen. 
     The existing protective film can be generally divided into soft film and toughened film, wherein the toughened film is mainly made of tempered glass. And the tempered glass is fitted to the touch screen, and when the device is dropped or scratched, the tempered film may protect the touch screen due to its hardness and prevent damage thereto. 
     However, before the commercial toughened film fits on the touch screen, the stains on the touch screen need to be erased, leaving a little dust, oil or fingerprints and other foreign matters which can easily produce air bubbles, thereby requires more time to wipe the touch screen before the protective film can be fitted onto the touch screen, which may cause frustration of the consumers. 
     SUMMARY 
     The present disclosure has been made in view of the above problems, and provides a dust-purifying adhesive layer and a method for manufacturing the dust-purifying adhesive layer, a dust-purifying film having the functions of dust-purifying and anti-foaming, a method for manufacturing the dust-purifying film, a film-attaching method for attaching the dust-purifying film and a dust-purifying film sleeve. 
     In order to solve the above problem, the present disclosure provides a dust-purifying adhesive layer comprising: a substrate layer, an optically clear adhesive (OCA)layer, and a dust-purifying layer, the dust-purifying layer and the OCA layer respectively disposed on two sides of the substrate layer, wherein the dust-purifying layer is adapted for dust-purifying and air bubbles elimination. 
     In some embodiments, the dust-purifying layer has fluidity, and a Brookfield viscosity of the dust-purifying layer ranges from 400 cps to 500 cps. 
     In some embodiments, the dust-purifying layer is configured to be arranged on a screen of an electronic device, and the dust-purifying layer wrapping foreign matters on the screen of the electronic device to remove dust and air bubbles on the screen. 
     In some embodiments, a material of the dust-purifying layer comprises the following components mixed by weight ratio: 28%-35% methyl vinyl silicone rubber, 55%-65% ethyl formate, 8%-12% xylene and 1.5%-2.5% ethylbenzene. 
     In some embodiments, the substrate layer has a thickness ranging from  48  um to 52 um, the OCA layer has a thickness ranging from 37 um to 43 um, and the dust-purifying layer has a thickness ranging from 37 um to 43 um. 
     In order to solve the above problem, the present disclosure a dust-purifying film, wherein the dust-purifying film comprises a protective layer and a dust-purifying adhesive layer according to the above dust-purifying adhesive layer, and the protective layer is attached to the OCA layer. 
     In some embodiments, the protective layer is a glass layer, and a thickness of the protective layer ranges from 0.05 mm to 0.85 mm. 
     In some embodiments, the dust-purifying film further comprises a release layer, and the release layer is arranged on a surface of the dust-purifying layer facing away from the substrate layer, and a thickness of the release layer ranges from 48 um to 52 um. 
     In order to solve the above problem, the present disclosure a method of manufacturing a dust-purifying adhesive layer, the method comprising: providing a softened substrate layer, coating silicone material on a first surface of the substrate layer and curing the silicon material in an oven to form a dust-purifying layer on the first surface of the substrate layer, compounding a first release layer on a surface of the dust-purifying layer, coating optically clear adhesive on a second surface of the substrate layer and performing ultraviolet curing to form an OCA layer on the second surface of the substrate layer, and compounding a second release layer on a surface of the OCA layer to obtain the dust-purifying adhesive layer, wherein the dust-purifying layer is adapted for dust-purifying and air bubbles eliminating. 
     In some embodiments, in the step of coating the silicone material on the first surface of the substrate layer, and curing the silicon material in the oven, the temperature of a channel of the oven is controlled to range from 150° C. to 180° C. 
     In some embodiments, in the step of coating the silicone material on the first surface of the substrate layer, and curing in the oven, a time period of curing the dust-purifying adhesive layer in the oven is controlled to be 2 minutes to 3 minutes. 
     In order to solve the above problem, the present disclosure a method for manufacturing a dust-purifying film, comprising the following steps: providing a substrate layer, coating silicone material on a first surface of the substrate layer and curing the silicon material in an oven to form a dust-purifying layer on the first surface of the substrate layer, compounding a release layer on a surface of the dust-purifying layer, coating an optically clear adhesive on a second surface of the substrate layer and performing ultraviolet curing to form an OCA layer on the second surface of the substrate layer, and attaching a protective layer on the surface of the OCA layer. 
     In some embodiments, in the step of coating the silicone material on the first surface of the substrate layer, and curing the silicon material in the oven, the temperature of a channel of the oven is controlled to range from 150° C. to 180° C. 
     In some embodiments, in the step of coating the silicone material on the first surface of the substrate layer, and curing the silicon material in the oven, a time period of curing the dust-purifying adhesive layer in the oven is controlled be 2 minutes to 3 minutes. 
     In order to solve the above problem, the present disclosure a film-attaching method for attaching a dust-purifying film, comprising: tearing off a release layer on a surface of the dust-purifying layer, aligning a surface of the dust-purifying pasted with the dust-purifying layer to a screen of an electronic device, placing the dust-purifying film on the screen of the electronic device, and pressing the dust-purifying film to exhaust gas and adhere to the screen of the electronic device. 
     In some embodiments, after pressing the dust-purifying film to exhaust gas and adhere to the screen of the electronic device, the film-attaching method further comprises: if foreign matters exist between the dust-purifying film and the screen of the electronic device, separating the dust-purifying film from the screen of the electronic device, removing the foreign matters, and repositioning the dust-purifying film on the screen of the electronic device. 
     In some embodiments, the step of removing the foreign matters comprises: if the foreign matters are on the screen of the electronic device, removing the foreign matters by wiping or pasting the foreign matters, and if the foreign matters are on the dust-purifying layer of the dust-purifying film, removing the foreign matters by a dust-purifying film repair paper. 
     In order to solve the above problem, a dust-purifying film sleeve, comprising: the above dust-purifying film, and a dust-purifying film repair paper, wherein the dust-purifying film repair paper comprises a body and a repair layer arranged on a surface of the body, and the repair layer is configured to be arranged on the dust-purifying layer of the dust-purifying film to repair the dust-purifying layer. 
     In some embodiments, a viscosity of the repair layer is greater than a viscosity of the dust-purifying layer. 
     In some embodiments, the repair layer is further configured to be arranged on the dust-purifying layer of the dust-purifying film to replace foreign matters on the dust-purifying layer. 
     In some embodiments, a material of the dust-purifying layer comprises the following components mixed by weight ratio: 28%-35% methyl vinyl silicone rubber, 55%-65% ethyl formate, 8%-12% xylene and 1.5%-2.5% ethylbenzene. 
     Compared with the prior art, the dust-purifying adhesive layer comprises a dust-purifying layer , the dust-purifying layer is adapted for dust-purifying and air bubbles elimination, and when the dust-purifying film is arranged on the screen of the electronic device, the dust-purifying layer is in direct contact with the screen, and during the film-pasting process, air bubbles can be quickly eliminated, so that no air bubbles are generated during the film-pasting process. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       Implementations of the present disclosure will now be described, by way of embodiment, with reference to the attached figures. 
         FIG.  1    is an exploded view of a dust-purifying adhesive layer of the present disclosure. 
         FIG.  2    is a schematic flowchart of a method for manufacturing the dust-purifying adhesive layer shown in  FIG.  1   . 
         FIG.  3    is an exploded view of a dust-purifying film of the present disclosure. 
         FIG.  4    is a schematic flowchart of a method for manufacturing the dust-purifying film shown in  FIG.  3   . 
         FIG.  5    is a schematic flowchart of a method for attaching the dust-purifying film of the present disclosure. 
         FIG.  6    is a schematic flowchart of another embodiment of a method for attaching the dust-purifying film of the present disclosure. 
         FIG.  7    is an exploded view of a dust-purifying film sleeve according to an embodiment of the present disclosure. 
         FIG.  8    is an exploded view of the dust-purifying film sleeve according to another embodiment of the present disclosure. 
         FIG.  9    is a photograph of a screen of an electronic device before attaching the film. 
         FIG.  10    is a photograph of the screen of the electronic device before attaching the film. 
         FIG.  11    is a photograph of the screen of the electronic device before attaching the film. 
         FIG.  12    is a photograph of the screen of the electronic device before attaching the film. 
         FIG.  13    is a photograph of the screen of the electronic device before attaching the film. 
         FIG.  14    is a photograph of the screen of the electronic device before attaching the film. 
         FIG.  15    is an effect diagram of the dust-purifying film of the present disclosure arranged on the screen of the electronic device. 
         FIG.  16    is an effect diagram of the dust-purifying film of the present disclosure arranged on the screen of the electronic device. 
         FIG.  17    is an effect diagram of the dust-purifying film of the present disclosure arranged on the screen of the electronic device. 
         FIG.  18    is an effect diagram of a conventional protective film arranged on the screen of the electronic device. 
         FIG.  19    is an effect diagram of the conventional protective film arranged on the screen of the electronic device. 
         FIG.  20    is an effect diagram of the conventional protective film arranged on the screen of the electronic device. 
         FIG.  21    is an effect diagram of the conventional dust-purifying film arranged on the screen of the electronic device. 
         FIG.  22    is an effect diagram of the conventional dust-purifying film arranged on the screen of the electronic device. 
     
    
    
     DETAILED DESCRIPTION 
     It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the exemplary embodiments described herein. However, it will be understood by those of ordinary skill in the art that the exemplary embodiments described herein may be practiced without these specific details. In other instances, methods, procedures, and components have not been described in detail so as not to obscure the related relevant feature being described. Also, the description is not to be considered as limiting the scope of the exemplary embodiments described herein. The drawings are not necessarily to scale and the proportions of certain parts may be exaggerated to better illustrate details and features of the present disclosure. 
     The term “comprising” when utilized, means “including, but not necessarily limited to”, specifically indicates open-ended inclusion or membership in the so-described combination, group, series, and the like. The disclosure is illustrated by way of example and not by way of limitation in the figures of the accompanying drawings in which like references indicate similar elements. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references may mean “at least one”. 
     Referring to  FIG.  1   , the present disclosure provides a dust-purifying adhesive layer  10 , which can be applied to a dust-purifying film, and the dust-purifying film can be, but is not limited to, a soft film or a toughened film. 
     The dust-purifying adhesive layer  10  comprises a substrate layer  11 , an optically clear adhesive (OCA) layer  12  and a dust-purifying layer  13 , and the OCA layer  12  and the dust-purifying layer  13  are respectively disposed on two sides of the substrate layer  11 . The dust-purifying layer  13  is adapted for dust-purifying and air bubbles elimination, and when the dust-purifying film is arranged on a screen of an electronic device, the dust-purifying layer  13  is configured to be arranged on the screen of the electronic device and directly contacts the screen, so that the dust-purifying layer  13  can quickly purify the dust and eliminate the air bubbles during the film-pasting process, thereby no air bubbles are generated during the film-pasting process. 
     Specifically, the dust-purifying layer  13  implements the functions of dust-purifying and anti-foaming by wrapping foreign matters on the screen of the electronic device. 
     In the present embodiment, the dust-purifying layer  13  has fluidity, so that in a case where foreign matters such as dust, oil and fingerprinting exist on the screen of the electronic device during the film-pasting process, the dust-purifying layer  13  wraps foreign matters, so that no air bubbles are generated during the film-pasting process, so as to realize the functions of dust-purifying and anti-foaming. 
     The dust-purifying layer  13  has a Brookfield viscosity in the range of 400 cps to 500 cps, wherein cps is a viscosity unit, and is commonly used for fluid viscosity. 
     In the present embodiment, the dust-purifying layer  13  may be a silica gel layer. Further, a material of the dust-purifying layer  13  comprises the following components mixed by weight ratio: 28%-35% methyl vinyl silicone rubber, 55%-65% ethyl formate, 8%-12% xylene and 1.5%-2.5% ethylbenzene. Of course, the dust-purifying layer  13  may also be made of other materials, which are not limited herein. 
     The air bubbles generated during the film-pasting process are mainly because foreign matters such as dust, oil, and fingerprint exist on the screen of the electronic device. The contact between foreign matters and the dust-purifying film leads to an uneven surface of the dust-purifying film, so that a slit or a gap is formed between the screen and the dust-purifying film. This results in the generation of the air bubbles. 
     In the present embodiment, the dust-purifying layer  13  has certain fluidity. When the dust-purifying film is configured to be arranged on the screen of the electronic device, if there are foreign matters such as oil, dust, fingerprinting on the screen, by the fluidity of the dust-purifying layer  13  rapidly wraps foreign matters such as dust, oil and fingerprints, and fills the slit or the gap formed between the foreign matters and the dust-purifying film. This can eliminate the air bubbles caused by foreign matters, thereby implementing the functions of dust-purifying and anti-foaming, so that the image quality of the electronic device is clearer. 
     In the present embodiment, a material of the substrate layer  11  is polyethylene terephthalate (PET). Of course, in other embodiments, the substrate layer  11  may also be another material, which is not limited herein. 
     In the present embodiment, the substrate layer  11  is subjected to a softening process so as to have certain flexibility. 
     Further, the flexibility of the substrate layer  11  is greater than the flexibility of the dust-purifying layer  13 . Of course, in other embodiments, the substrate layer  11  may also have a fluidity corresponding to the dust-purifying layer  13 . 
     When the dust-purifying layer  13  wraps foreign matters such as oil, dust, and fingerprint, the substrate layer  11  corresponding to the wrapping position will be slightly bulging. In this case, since the substrate layer  11  has certain flexibility, the substrate layer  11  at the position corresponding to the bulging position in the dust-purifying layer  13  can remain flat, thereby effectively ensuring the flatness of the entire dust-purifying film. 
     Further, the OCA layer  12  may be made of optically clear adhesive (OCA). Of course, in other embodiments, the OCA layer  12  may also be replaced by a layer made of other materials, which is not limited herein. 
     In the present embodiment, the thickness of the substrate layer  11  ranges from 48 um to 52 um, the thickness of the OCA layer  12  ranges from 37 um to 43 um, and the thickness of the dust-purifying layer  13  ranges from 37 um to 43 um. 
     Compared with the prior art, the dust-purifying adhesive layer  10  provided by the present disclosure comprises a dust-purifying layer  13  having functions of dust-purifying function and anti-foaming , and when the dust-purifying film is arranged on the screen of the electronic device, the dust-purifying layer  13  is in direct contact with the screen, and during the film-pasting process, air bubbles can be quickly eliminated, so that no air bubbles are generated during the film-pasting process. 
     Referring to FIG 2 , the present disclosure further provides a method of manufacturing the above dust-purifying adhesive layer  10 , the method comprising the following steps. 
     Step S 101 , providing a softened substrate layer, 
     Step S 102 , coating silicone material on a first surface of the substrate layer, and curing the silicon material in an oven to form a dust-purifying layer on the first surface of the substrate layer, 
     step S 103 , compounding a first release layer on the surface of the dust-purifying layer, 
     Step S 104 : coating optically clear adhesive (OCA) on a second surface of the substrate layer and performing ultraviolet curing to form an optically clear adhesive (OCA) layer on the second surface of the substrate layer, and 
     Step S 105 , compounding a second release layer on a surface of the OCA layer to obtain a dust-purifying adhesive layer. 
     Further, in the step of coating the silicone material on the first surface of the substrate layer, and curing the silicon material in the oven, the temperature of a channel of the oven is controlled to range from 150° C. to 180° C. 
     Further, in the step of coating the silicone material on the first surface of the substrate layer, and curing the silicon material in the oven, the time for curing the dust-purifying adhesive layer in the oven is controlled to be 2 minutes to 3 minutes. 
     Compared with the prior art, the dust-purifying adhesive layer obtained by the manufacturing method provided by the present disclosure comprises the dust-purifying layer having functions of dust-purifying function and anti-foaming , and when the dust-purifying film is arranged on the screen of the electronic device, the dust-purifying layer is in direct contact with the screen, and during the film-pasting process, air bubbles can be quickly eliminated, so that no air bubbles are generated during the film-pasting process. 
     Referring to  FIG.  3   , the present disclosure further provides a dust-purifying film  100 . The dust-purifying film  100  may be, but is not limited to, a soft film and a toughened film. In the present embodiment, the dust-purifying film  100  is taken as the toughened film as an example for description. The dust-purifying film  100  has functions of dust-purifying function and anti-foaming. 
     The dust-purifying film  100  comprises a protective layer  30  and the dust-purifying adhesive layer  10 , and the protective layer  30  is arranged on the OCA layer  12  of the dust-purifying adhesive layer  10 . The structure of the dust-purifying adhesive layer  10  is the same as that of the dust-purifying adhesive layer  10  described above, and will not be described herein again. 
     In the present embodiment, the protective layer  30  is a glass layer, and the thickness of the protective layer  30  ranges from 0.05 mm to 0.85 mm. 
     Further, the dust-purifying film  100  further comprises a first release layer  40 , which is arranged on a surface of the dust-purifying layer  13  facing away from the substrate layer  11 , and the thickness of the first release layer  40  ranges from 48 um to 52 um. 
     By adhering the first release layer  40  on the surface of the dust-purifying layer  13  away from the substrate layer  11 , the dust-purifying layer  13  of the dust-purifying layer  10  can be protected, and the dust-purifying layer  13  can be arranged on the screen of the electronic device by tearing off the first release layer  40  before adhering the dust-purifying film. 
     Compared with the prior art, the dust-purifying film  100  provided by the present disclosure has the dust-purifying adhesive layer  10  described above, and the dust-purifying adhesive layer  10  comprises a dust-purifying layer  13  having functions of dust-purifying and anti-foaming , and when the dust-purifying film  10  is arranged on the screen of the electronic device, the dust-purifying layer  13  is arranged on the screen of the electronic device and directly contacts the screen, so that the dust-purifying layer  13  can quickly dust-purify and anti-foam during the film-pasting process, so that no air bubbles are generated during the film-pasting process. 
     Referring to  FIG.  4   , the present disclosure further provides a method of manufacturing a dust-purifying film having dust-purifying and anti-foaming function, the method comprising the following steps: 
     Step S 201 : providing a substrate layer, 
     Step S 202 , coating silicone material on a first surface of the substrate layer, and curing the silicon material in an oven to form a dust-purifying layer on the first surface of the substrate layer, 
     Step S 203 , compounding a release layer on a surface of the dust-purifying layer, 
     Step S 204 , coating optically clear adhesive (OCA) on a second surface of the substrate layer and performing ultraviolet curing to form an OCA layer on the second surface of the substrate layer, 
     Step S 205 , attaching a protective layer on the surface of the OCA layer. 
     Further, in the step of coating the silicone material on the first surface of the substrate layer, and curing the silicon material in the oven, the temperature of a channel of the oven is controlled to range from 150° C. to 180° C. 
     Further, in the step of coating the silicone material on the first surface of the substrate layer, and curing by the oven, the time for curing the dust-purifying adhesive layer in the oven is controlled to be 2 minutes to 3 minutes. 
     Compared with the prior art, the dust-purifying film obtained by the manufacturing method provided by the present disclosure comprises the dust-purifying adhesive layer described above, and the dust-purifying adhesive layer comprises the dust-purifying layer having functions of dust-purifying and anti-foaming. When the dust-purifying film is arranged on the screen of the electronic device, the dust-purifying layer is in direct contact with the screen, and during the film-pasting process, dust-purify and anti-foam can be quickly performed, so that no air bubbles are generated during the film-pasting process. 
     Referring to  FIG.  5   , the present disclosure further provides a film-pasting method for attaching the dust-purifying film  100 , the film-pasting method comprising the following steps. 
     Step S 301 , tearing off the first release layer  40  on the surface of the dust-purifying layer  13 , 
     Step S 302 , aligning the surface of the dust-purifying film  100  pasted with the dust-purifying layer  13  to the screen of the electronic device, 
     Step S 303 , placing the dust-purifying film  100  on the screen of the electronic device, and 
     Step S 304 , pressing the dust-purifying film  100  to exhaust gas and adhere to the screen of the electronic device. 
     In an embodiment, referring to  FIG.  6   , after pressing the dust-purifying film  100  to exhaust gas and adhere to the screen of the electronic device, the film-attaching method further comprises the following steps. 
     Step S 305 : if foreign matters exist between the dust-purifying film  100  and the screen of the electronic device after film-attaching, separating the dust-purifying film  100  from the screen of the electronic device, 
     Step S 306 : removing the foreign matters, and 
     Step S 307 : repositioning the dust-purifying film  100  on the screen of the electronic device. 
     The step of removing the foreign matters comprises the following steps. 
     If the foreign matters are on the screen of the electronic device, removing the foreign matters by wiping or pasting the foreign matters, and 
     If the foreign matters are on the dust-purifying layer  13  of the dust-purifying film  100 , removing the foreign matters by a dust-purifying film repair paper. 
     Compared with the prior art, in the film method provided in the present embodiment, since the dust-purifying film  100  used has functions of dust-purifying function and anti-foaming, during the film-pasting process, air bubbles can be quickly eliminated, so that no air bubbles are generated during the film-pasting process. In addition, in the case where foreign matters remains on the screen of the electronic device, the dust-purifying film  100  can quickly wrap the foreign matters, so as to avoid the occurrence of air bubbles, thereby achieving an excellent function of anti-foaming. 
     Meanwhile, if a large volume of foreign matters remains on the screen of the electronic device, the dust-purifying film  100  may be separated from the screen of the electronic device, and then the foreign matters is cleaned, and the dust-purifying film  100  is adhered on the screen of the electronic device again. The dust-purifying film  100  provided in this embodiment not only has functions of dust-purifying and anti-foaming, but also the special fluidity of the dust-purifying layer enables it to be repeatedly adhered and used compared with the existing protective film. In the process of separating the dust-purifying film  100  from the electronic device screen, even if the surface of the dust-purifying layer is stained with foreign matters such as dust, it will not affect the re-bonding of the dust-purifying film  100  with the electronic device screen. 
     The present disclosure further provides a dust-purifying film sleeve  200 . Referring to  FIG.  7   , the dust-purifying film sleeve  200  comprises a dust-purifying film repair paper  50  and the dust-purifying film  100 . The dust-purifying film repair paper  50  comprises a body  51  and a repair layer  52  arranged on the surface of the body  51 . The repair layer  52  is configured to attaching the dust-purifying layer  13  of the dust-purifying film  100  to repair the dust-purifying layer  13 . 
     Further, a viscosity of the repair layer  52  is greater than a viscosity of the dust-purifying layer  13 . 
     In the case where the viscosity of the repair layer  52  is greater than the viscosity of the dust-purifying layer  13 , the repair layer  52  is further configured to adhere to the dust-purifying layer so as to displace foreign matters arranged on the dust-purifying layer  13 , thereby repairing the dust-purifying layer  13  and effectively extending the service life of the dust-purifying film  100 . 
     In the present embodiment, a material of the dust-purifying layer  13  comprises the following components mixed by weight ratio: 28%-35% methyl vinyl silicone rubber, 55%-65% ethyl formate, 8%-12% xylene and 1.5%-2.5% ethylbenzene. 
     The key for enhancing the adsorption capacity of the silica gel is to increase its active unit structure. By using the patented MA-enhance™-adsorption enhancement technology, a strong pressure can be generated at the time of contact between the repair layer  52  and the dust-purifying film  100 . Strong and weak gel phase absorption produces a chemical activation reaction, which quickly activates the silicone molecular activity of the dust-purifying film  100 , making its molecule active unit structure more active, thus enhancing its adsorption, and making the automatic adsorption effect of the dust-purifying film  100  better. 
     Further, the dust-purifying film repair paper  50  further comprises a second release layer  53 , and the second release layer  53  is arranged on the repair layer  52 . 
     By setting the second release layer  53  on the repair layer  52 , the second release layer  53  can be protected, and when repairing the dust-purifying layer  13 , it is only necessary to tear off the second release layer  53  on the repair layer  52 . 
     Of course, referring to  FIG.  8   , in other embodiments, the dust-purifying film repair paper  50  comprises a plurality of second release layers  53  arranged on the repair layer  52 . 
     By setting a plurality of second release layers  53  on the dust-purifying film repair paper  50 , the user can selectively tear off the required amount of second release layers  53  according to the demand. 
     Of course, in other embodiments, the user can also temporarily adhere the dust-purifying film  100  to the repair layer  52  without using the dust-purifying film  100 , and adhere the dust-purifying film  100  to the screen of the electronic device again when it needs to be used. 
     Compared with the prior art, the dust-purifying adhesive layer  10  of the dust-purifying film sleeve  200  provided by the present embodiment comprises the dust-purifying layer  13  having functions of adjust-purifying and anti-foaming. When the dust-purifying film  100  is arranged on the screen of the electronic device, the dust-purifying layer  13  is in direct contact with the screen of the electronic device, and during the film-pasting process, air bubbles can be quickly eliminated, so that no air bubbles are generated during the film-pasting process. The dust-purifying adhesive layer  10  is made of a silica gel material, and silica gel is a high-elasticity porous structure polymer, and after staining such as dust and oil is adhered, the surface tension thereof is increased, thereby affecting the leveling effect thereof. In the present disclosure, the repair layer  52  can repair the dust-purifying layer  13 , and quickly replace the dust, oil and other stains on the dust-purifying film  100  through the viscosity difference between the repair layer  52  and the dust-purifying layer  13 , repair the dents and sliding marks in the dust-purifying adhesive layer  10 , reduce the surface tension of the dust-purifying adhesive layer  10 , realize rapid traceless leveling, so that the repaired dust-purifying adhesive  10  has strong wrapping again. If it is attached to the electronic device again, no air bubbles will be generated, so that the dust-purifying film  100  can be recycled and has a longer service life. 
     The repair process includes the following two manners. Firstly, since the viscosity of the repair layer  52  is greater than the viscosity of the dust-purifying layer  13 , when the repair layer  52  is arranged on the surface of the dust-purifying layer  13 , the repair layer  52  can displace foreign matters such as dust on the surface of the dust-purifying layer  13 , making the surface of the dust-purifying layer  13  cleaner. Second, since foreign matters are adhered on the surface of the dust-purifying layer  13  will lead to the uneven surface of the dust-purifying layer. By pasting the repair layer  52  on the dust-purifying layer  13 , its fluidity and the fluidity of the dust-purifying layer  13  will repair the uneven surface of the dust-purifying layer  13 . In this way, the dust-purifying film  100  can be reused to improve its utilization rate. 
     Hereinafter, the film-attaching effect of the dust-purifying film  100  of the present disclosure will be described. 
       FIGS.  9  to  14    are photographs of the screen of the electronic device before attaching the film,  FIGS.  15  to  17    are the dust-purifying film  100  of the present disclosure arranged on the screen of the electronic device.  FIGS.  18  to  22    are the effect diagrams of the conventional protective film arranged on the screen of the electronic device. 
     As can be seen from  FIGS.  9  to  14   , there is dust on the screen of the electronic device before attaching the film, and many air bubbles are generated after the existing protective film is arranged on the screen of the electronic device, while no air bubbles are generated after the dust-purifying film  100  of the present disclosure is arranged on the screen of the electronic device. It can be seen from the comparison that the dust-purifying film  100  of the present disclosure has excellent dust-purifying and anti-foaming functions. 
     What disclosed above are only the preferred embodiments of the present application, which of course cannot be used for limiting the present application. Therefore, equivalent changes made in accordance with the present application still fall within the scope of the present application.