CN111040658A - High-transmittance protective sleeve with surface offset design and material rolling structure - Google Patents
High-transmittance protective sleeve with surface offset design and material rolling structure Download PDFInfo
- Publication number
- CN111040658A CN111040658A CN201911412912.9A CN201911412912A CN111040658A CN 111040658 A CN111040658 A CN 111040658A CN 201911412912 A CN201911412912 A CN 201911412912A CN 111040658 A CN111040658 A CN 111040658A
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- Prior art keywords
- double
- rubber layer
- protective film
- sided adhesive
- protective
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000001681 protective effect Effects 0.000 title claims abstract description 91
- 238000002834 transmittance Methods 0.000 title claims abstract description 30
- 239000000463 material Substances 0.000 title description 12
- 238000005096 rolling process Methods 0.000 title description 3
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 34
- 239000000853 adhesive Substances 0.000 claims abstract description 30
- 230000001070 adhesive effect Effects 0.000 claims abstract description 30
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229920002799 BoPET Polymers 0.000 claims abstract description 25
- 239000000741 silica gel Substances 0.000 claims abstract description 22
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 22
- 239000004945 silicone rubber Substances 0.000 claims abstract description 17
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 12
- 239000010410 layer Substances 0.000 claims description 47
- 239000005041 Mylar™ Substances 0.000 claims description 12
- 239000012790 adhesive layer Substances 0.000 claims description 6
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 6
- 239000002390 adhesive tape Substances 0.000 claims description 5
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 5
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 4
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 3
- 239000003522 acrylic cement Substances 0.000 claims description 3
- 239000003063 flame retardant Substances 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 3
- 239000004745 nonwoven fabric Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 230000035699 permeability Effects 0.000 claims 3
- 230000000536 complexating effect Effects 0.000 claims 1
- 230000035515 penetration Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 17
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 230000006872 improvement Effects 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- 241000251468 Actinopterygii Species 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 229920006268 silicone film Polymers 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/29—Laminated material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
- B65D85/67—Containers, packaging elements or packages, specially adapted for particular articles or materials for web or tape-like material
- B65D85/671—Containers, packaging elements or packages, specially adapted for particular articles or materials for web or tape-like material wound in flat spiral form
- B65D85/672—Containers, packaging elements or packages, specially adapted for particular articles or materials for web or tape-like material wound in flat spiral form on cores
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Laminated Bodies (AREA)
Abstract
The invention provides a high-transmittance protective sleeve with a surface offset design and a coil structure, wherein the high-transmittance protective sleeve with the surface offset design comprises the following components in sequence: a high-transmittance protective film, a Mylar tape, a first double-sided adhesive, a silicone rubber layer, a second double-sided adhesive, and a silicone protective film; the Mylar tape, the first double-sided adhesive, the silicon rubber layer, the second double-sided adhesive and the silica gel protective film structure which are laminated together are provided with at least three detection channels which are arranged in a penetrating way, the high-transmittance protective film is suitable for detecting light rays to penetrate through and enter each detection channel, one surface of the silicon rubber layer, which is combined with the silica gel protective film, is provided with a step structure, and the step structure is limited by steps on the silica gel protective film. The protective sleeve can be combined with a mobile phone camera to play a role in protection, and the detection efficiency is improved. By adopting the silicon rubber layer as the main structure, the protective sleeve of the invention has proper hardness. Through setting up a disconnected poor structure, be favorable to silica gel protection film and attached more firm of product.
Description
Technical Field
The invention relates to a camera protective sleeve, in particular to a high-transmittance protective sleeve with a surface offset design and a material rolling structure.
Background
The smart phone is a general name which has an independent operating system and an independent operating space like a personal computer, can be used by a user to install programs provided by third-party service providers such as software, games, navigation and the like, and can realize wireless network access to a mobile phone type through a mobile communication network. The existing smart phones are equipped with cameras, and for the mobile phone cameras, before leaving factories, the mobile phone cameras need to be circulated for many times, and meanwhile, quality detection is needed. Therefore, there is a need to provide a further solution to the problem of how to protect the mobile phone camera and facilitate the detection of the mobile phone camera.
Disclosure of Invention
The invention aims to provide a high-transmittance protective sleeve with a surface offset design and a coil structure, so as to overcome the defects in the prior art.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the utility model provides a high protective sheath that passes through of surface offset design, it is including setting gradually: a high-transmittance protective film, a Mylar tape, a first double-sided adhesive, a silicone rubber layer, a second double-sided adhesive, and a silicone protective film;
mylar sticky tape, first double faced adhesive tape, silicon rubber layer, second double faced adhesive tape, silica gel protection film structure that stack together have at least three sense passage that link up the setting, the high protection film that passes is sealed from one end in the space sense passage, just the high protection film that passes is suitable for to detect light and passes and penetrate into each sense passage, the silicon rubber layer with the one side that the silica gel protection film combined together is provided with a disconnected poor structure, disconnected poor structure has step on the silica gel protection film is injectd.
As an improvement of the high-transmittance protective sleeve designed by the surface offset, the high-transmittance protective film comprises the following components in sequence: release layer, PU glue film, PET layer.
As an improvement of the high-permeability protective sleeve designed for the surface offset, the Mylar tape is an acrylic acid type flame-retardant tape.
As an improvement of the high-permeability protective sleeve with the surface offset design, one surface of the first double-sided adhesive is a silica gel surface, the other surface of the first double-sided adhesive is an acrylic adhesive surface, and the first double-sided adhesive is directly compounded with one surface of the silica gel layer through the silica gel surface.
As an improvement of the high-permeability protective sleeve of the surface offset design, the other surface of the silicon rubber layer is coated with a treating agent suitable for being compounded with the second double-sided adhesive.
As an improvement of the high-permeability protective sleeve designed by the surface offset, the hardness of the silicon rubber layer is between that of foam and that of plastic.
As an improvement of the high-permeability protective sleeve designed for surface offset, the second double-sided adhesive comprises the following components in sequence: propylene series adhesive layer, non-woven fabric layer, propylene series adhesive layer.
As an improvement of the high-permeability protective sleeve designed by the surface offset, the high-permeability protective film, the Mylar tape, the first double-sided adhesive and the silicon rubber layer are all provided with a pull lug.
As an improvement of the high-transmittance protective sleeve designed for the surface offset, the high-transmittance protective sleeve designed for the surface offset further comprises a mylar shielding layer arranged on the silica gel protective film, and the mylar shielding layer is aligned with one side edge of the silica gel protective film.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a roll-to-roll structure, comprising: the high-permeability protective sleeve comprises a material belt and the high-permeability protective sleeve which is adhered to the material belt and is designed by the surface discontinuities.
Compared with the prior art, the invention has the beneficial effects that: the protective sleeve can be combined with the mobile phone camera, and plays a role in protecting the mobile phone camera in the turnover process of the mobile phone camera. Meanwhile, the transparent protective film is adopted, so that the protective film does not need to be torn off to directly detect when the camera detects, and the detection efficiency is improved. By adopting the silicon rubber layer as the main structure, the protective sleeve of the invention has proper hardness. Finally, the silicon rubber layer is provided with a break structure, which is beneficial to the firmer attachment of the silicon rubber protective film and the product and is not easy to fall off.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a front view of one embodiment of a high-permeability protective casing of the surface aberration design of the present invention;
FIG. 2 is an exploded view of one embodiment of a high-permeability protective casing of the surface aberration design of the present invention;
fig. 3 is a schematic perspective view of a roll material structure according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 and 2, the high-transmittance protective sheath 100 of the surface offset design of the present embodiment includes, in order: a high-transmittance protective film 1, a Mylar tape 2, a first double-sided adhesive 3, a silicone rubber layer 4, a second double-sided adhesive 5, and a silicone protective film 6.
The laminated Mylar tape 2, the first double-sided adhesive 3, the silicone rubber layer 4, the second double-sided adhesive 5 and the silicone rubber protective film 6 have at least three detection channels 7 arranged through.
The detection channel 7 is used for detecting the passing of the light path so as to perform corresponding detection on the protective sleeve of the embodiment. Because at least three detection channels 7 are arranged, the protective sleeve of the embodiment can be suitable for protecting and detecting the camera of a three-camera or four-camera mobile phone.
According to the difference of the shapes and the sizes of the lenses in the three-shot shooting or the four-shot shooting, the detection channels 7 can be correspondingly arranged according to the shapes and the sizes of the lenses. When the shapes and sizes of the lenses are consistent, the detection channels 7 can also be designed uniformly. Meanwhile, each detection channel 7 may be correspondingly arranged according to the positional relationship of the camera.
The high-transmittance protective film 1 is combined and fixed on one surface of the silicon rubber layer 4 through the Mylar tape 2 and the first double-sided adhesive 3, the high-transmittance protective film 1 spatially seals the detection channels 7 from one end, and the high-transmittance protective film 1 is suitable for detecting light rays to penetrate through and enter each detection channel 7.
So can be when the camera detects, need not tear the protection film and directly detect, improved the efficiency that detects. In one embodiment, the high-transmittance protective film 1 includes, in order: release layer, PU glue film, PET layer. The high-transmittance protective film 1 has the light transmittance of more than or equal to 92 percent, and is convenient for detection with a film; the material has the advantages of antistatic property on two sides and difficult dust absorption.
The mylar tape 2 is an acrylic type flame retardant tape. One side of the first double-sided adhesive 3 is a silica gel side, the other side is an acrylic adhesive side, and the first double-sided adhesive 3 is directly compounded with one side of the silica rubber layer 4 through the silica gel side. Thus, the silicone rubber layer 4 is prevented from being delaminated without brushing a treatment agent on one surface thereof.
The silicone rubber layer 4 is used as the main structure of the high-transmittance sheath 100100 of this embodiment. The hardness of the silicone rubber layer 4 is between the hardness of foam and the hardness of plastic. So when guaranteeing certain hardness, can avoid causing the fish tail to the camera. For good compounding with the second double-sided adhesive 5, the other side of the silicone rubber layer 4 is coated with a treating agent suitable for compounding with the second double-sided adhesive 5. In one embodiment, the second double-sided adhesive 5 comprises, in order: propylene series adhesive layer, non-woven fabric layer, propylene series adhesive layer.
Meanwhile, in order to make the silicone rubber layer 4 firmly compound with the silicone protective film 6 through the second double-sided adhesive tape 5, a cross-sectional structure is provided on the surface where the silicone rubber layer 4 and the silicone protective film 6 are combined. In one embodiment, the offset structure is defined by a step on the protective silicone film 6. Thus, by providing a step structure on the silicone rubber layer 4, the silicone protective film 6 can be attached to the product more firmly and is not easy to fall off.
In addition, the high-transmittance protective film 1, the Mylar tape 2, the first double-sided adhesive 3, and the silicone rubber layer 4 are all provided with a pull tab 41. Therefore, after the use, when the red pull tab 41 is pulled to tear the protective film, the high-transmittance protective film 1 is pulled synchronously, so that the high-transmittance protective film 1 is not layered.
The silica gel protection film 6 comprises the following components in sequence: the coating comprises an electrostatic liquid coating, a PET blue film, double anti-static silica gel and a PET substrate. The silica gel protective film 6 has the advantages of difficult residual glue, antistatic double-sided performance and difficult dust absorption.
In addition, the high-transmittance protective cover 100 of the present embodiment further includes a mylar shielding layer 8 disposed on the silicone protective film 6, wherein the mylar shielding layer 8 is aligned with one side edge of the silicone protective film 6. In this way, by providing the mylar shield layer 8, the mylar shield layer 8 does not have tackiness, and thus the silicone protective film 6 is easily peeled off from the tape. Please refer to the technical scheme of the roll material structure in the specification for the description of the material belt.
In consideration of the fact that continuous feeding of the protective sleeves is needed in actual production, a plurality of protective sleeves need to be arranged on one material belt to form a roll of material, and therefore the material belt can conveniently carry the protective sleeves to perform continuous operation.
As shown in fig. 3, the roll structure 200 of the present embodiment includes: a tape 201, a high-permeability protective cover 100 adhered to the tape 201 and having a plurality of surface discontinuities as described above.
As described above, in order to facilitate the peeling of the high-transmittance protective covers 100, any of the high-transmittance protective covers 100 is bonded to the tape 201 through the surface thereof having the mylar shield layer 8. Thus, the mylar shield layer 8 can easily separate the edge of the high-transmittance protective cover 100 from the tape 201 during peeling, thereby preventing the occurrence of the sticking problem.
In conclusion, the protective sleeve can be combined with the mobile phone camera, and plays a role in protecting the mobile phone camera in the turnover process of the mobile phone camera. Meanwhile, the transparent protective film is adopted, so that the protective film does not need to be torn off to directly detect when the camera detects, and the detection efficiency is improved. By adopting the silicon rubber layer as the main structure, the protective sleeve of the invention has proper hardness. Finally, the silicon rubber layer is provided with a break structure, which is beneficial to the firmer attachment of the silicon rubber protective film and the product and is not easy to fall off.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The utility model provides a high protective sheath that passes through of surface offset design which characterized in that, the high protective sheath that passes through of surface offset design is including setting gradually: a high-transmittance protective film, a Mylar tape, a first double-sided adhesive, a silicone rubber layer, a second double-sided adhesive, and a silicone protective film;
mylar sticky tape, first double faced adhesive tape, silicon rubber layer, second double faced adhesive tape, silica gel protection film structure that stack together have at least three sense passage that link up the setting, the high protection film that passes is sealed from one end in the space sense passage, just the high protection film that passes is suitable for to detect light and passes and penetrate into each sense passage, the silicon rubber layer with the one side that the silica gel protection film combined together is provided with a disconnected poor structure, disconnected poor structure has step on the silica gel protection film is injectd.
2. The protective cover of claim 1, wherein the protective film comprises, in order: release layer, PU glue film, PET layer.
3. The high penetration protective casing of a surface discontinuity design according to claim 1, wherein said mylar tape is an acrylic-type flame retardant tape.
4. The high-permeability protective sleeve with the surface offset design according to claim 1, wherein the first double-sided adhesive surface is a silica gel surface, the other surface is an acrylic adhesive surface, and the first double-sided adhesive is directly compounded with one surface of the silica rubber layer through the silica gel surface.
5. The surface-differential engineered high permeability protective casing of claim 1 wherein the other side of said silicone rubber layer is coated with a treating agent suitable for complexing with said second two-sided adhesive.
6. The surface-offset engineered high-permeability boot of claim 1, wherein the hardness of the silicone rubber layer is between the hardness of foam and the hardness of plastic.
7. The high-permeability protective casing of a surface offset design according to claim 1, wherein the second double-sided adhesive comprises, in order: propylene series adhesive layer, non-woven fabric layer, propylene series adhesive layer.
8. The surface differential engineered high permeability boot of claim 1, wherein said high permeability protective film, mylar tape, first double sided adhesive, and silicone rubber layer are provided with a tab.
9. The protective cover of claim 1, further comprising a mylar shield disposed on the silicone protective film, the mylar shield being aligned with a side edge of the silicone protective film.
10. A roll-to-roll structure, said roll-to-roll structure comprising: a tape, a high-permeability protective cover adhered to the tape and having a plurality of surface discontinuities of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911412912.9A CN111040658A (en) | 2019-12-31 | 2019-12-31 | High-transmittance protective sleeve with surface offset design and material rolling structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911412912.9A CN111040658A (en) | 2019-12-31 | 2019-12-31 | High-transmittance protective sleeve with surface offset design and material rolling structure |
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| Publication Number | Publication Date |
|---|---|
| CN111040658A true CN111040658A (en) | 2020-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911412912.9A Pending CN111040658A (en) | 2019-12-31 | 2019-12-31 | High-transmittance protective sleeve with surface offset design and material rolling structure |
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| Country | Link |
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| CN (1) | CN111040658A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111347749A (en) * | 2020-04-27 | 2020-06-30 | 苏州益邦电子材料有限公司 | Surface treatment-free anti-warping protective sleeve and material rolling structure |
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| KR101954720B1 (en) * | 2011-12-09 | 2019-03-07 | 엘지이노텍 주식회사 | Camera Module |
| CN208665989U (en) * | 2018-07-18 | 2019-03-29 | 苏州益邦电子材料有限公司 | The integrated multifunctional pick-up head protective film of multicomponent |
| CN209568055U (en) * | 2019-03-08 | 2019-11-01 | 昆山博瑞思特电子有限公司 | Step camera head protecting film |
| CN110401753A (en) * | 2019-08-21 | 2019-11-01 | 苏州益邦电子材料有限公司 | Convenient for the camera head protecting set and coiled strip structure of detection |
| CN211946890U (en) * | 2019-12-31 | 2020-11-17 | 苏州益邦电子材料有限公司 | High-transmittance protective sleeve with surface offset design and material rolling structure |
-
2019
- 2019-12-31 CN CN201911412912.9A patent/CN111040658A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101954720B1 (en) * | 2011-12-09 | 2019-03-07 | 엘지이노텍 주식회사 | Camera Module |
| CN208665989U (en) * | 2018-07-18 | 2019-03-29 | 苏州益邦电子材料有限公司 | The integrated multifunctional pick-up head protective film of multicomponent |
| CN209568055U (en) * | 2019-03-08 | 2019-11-01 | 昆山博瑞思特电子有限公司 | Step camera head protecting film |
| CN110401753A (en) * | 2019-08-21 | 2019-11-01 | 苏州益邦电子材料有限公司 | Convenient for the camera head protecting set and coiled strip structure of detection |
| CN211946890U (en) * | 2019-12-31 | 2020-11-17 | 苏州益邦电子材料有限公司 | High-transmittance protective sleeve with surface offset design and material rolling structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111347749A (en) * | 2020-04-27 | 2020-06-30 | 苏州益邦电子材料有限公司 | Surface treatment-free anti-warping protective sleeve and material rolling structure |
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