CN109575829B - Segment difference multilayer composite film and coiled material and preparation method thereof - Google Patents
Segment difference multilayer composite film and coiled material and preparation method thereof Download PDFInfo
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- CN109575829B CN109575829B CN201711484111.4A CN201711484111A CN109575829B CN 109575829 B CN109575829 B CN 109575829B CN 201711484111 A CN201711484111 A CN 201711484111A CN 109575829 B CN109575829 B CN 109575829B
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- 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
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/40—Applications of laminates for particular packaging purposes
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- 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
- B65D2565/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D2565/38—Packaging materials of special type or form
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- 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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
- C09J2301/122—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present only on one side of the carrier, e.g. single-sided adhesive tape
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- 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
- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester in the substrate
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention relates to a segment difference multilayer composite film, a coiled material and a preparation method thereof. Compared with the prior art, the invention has the advantages that: the invention utilizes the multilayer structure of the multilayer composite film to carry out layered and segmented cutting on the multilayer composite film from the starting end to obtain the level difference multilayer composite film, so that the level difference is reduced layer by layer, and a large level difference can be changed into a plurality of small level differences after winding.
Description
Technical Field
The invention relates to a layered product, in particular to a segment difference multilayer composite film, a coiled material and a preparation method thereof.
Background
The web is generally formed by winding the film product around a core tube with a certain winding tension. For multilayer composite films such as protective films and explosion-proof films, the section difference is generated by the lamination with a core tube in the winding process, the appearance of a coiled material is poor due to the section difference of the core tube, the core portion can have indentation after the coiled material is coiled, and the performance of the multilayer film is not influenced due to the fact that stress is not concentrated. And the larger the film thickness is, the larger the step difference generated by the lamination with the core tube during the winding process is, the more easily the appearance failure is caused, the indentation is caused and the performance is reduced.
Although there are core tubes on the market with buffer design, the buffer material on the surface of the core tube can absorb the step difference generated in the winding process, but the buffer material can play a very little role for thicker materials such as rupture membranes.
Disclosure of Invention
The first technical problem to be solved by the invention is to provide a level difference multilayer composite film capable of reducing the level difference of a winding core aiming at the prior art.
The second technical problem to be solved by the invention is to provide a preparation method of the stepped multilayer composite film.
The third technical problem to be solved by the invention is to provide a roll core with small segment difference, good appearance, no indentation and good performance.
The fourth technical problem to be solved by the invention is to provide a preparation method of the section difference coiled material.
The technical scheme adopted by the invention for solving the first technical problem is as follows: a level difference multilayer composite film characterized by: the outer layer is attached to the inner layer, and the starting end of the outer layer in the two adjacent layers in the length direction protrudes out of the inner layer.
Preferably, the number of layers of the level difference multilayer composite film is 3-10. At the starting end along the length direction, the middle outer layer protrudes out of the inner layer in two adjacent layers; if the first layer, the second layer, the third layer and the fourth layer are respectively arranged from inside to outside, the second layer protrudes from the first layer, the third layer protrudes from the second layer and the like at the starting end of the segmented multilayer composite film along the length direction.
Preferably, the adhesive layer is arranged between the layers of the multi-layer composite film with the step difference, and the initial end of the adhesive layer in the length direction is flush with the adjacent outer layer and protrudes out of the adjacent inner layer together.
The technical scheme adopted by the invention for solving the second technical problem is as follows: the preparation method of the stepped multilayer composite film comprises the following steps:
(1) the multilayer composite film is formed by laminating at least two layers inside and outside;
(2) and carrying out layered and sectional cutting on the multilayer composite film from the outer layer to the inner layer along the starting end in the length direction, so that the outer layer of two adjacent layers of the starting end protrudes out of the inner layer, and thus obtaining the required stepped multilayer composite film.
The technical scheme adopted by the invention for solving the third technical problem is as follows: the segment difference coiled material applying the segment difference multilayer composite film is characterized in that: the composite core comprises a core tube and a multi-layer composite film with different sections, wherein the innermost layer of the multi-layer composite film with different sections is attached to the core tube, and the multi-layer composite film with different sections is wound on the core tube from the starting end.
Preferably, the outer surface of the core tube is coated with a buffer material.
The technical scheme adopted by the invention for solving the fourth technical problem is as follows: the preparation method of the segment difference coiled material comprises the following steps:
(1) attaching the innermost layer of the multi-layer composite film with the section difference to the core pipe;
(2) and applying a certain coiling tension to the level difference multilayer composite film from the starting end to wind the multilayer composite film around the core pipe to obtain the required level difference coiled material.
Compared with the prior art, the invention has the advantages that:
(1) the method utilizes the multilayer structure of the multilayer composite film to carry out layered and segmented cutting on the multilayer composite film from the starting end to obtain the level difference multilayer composite film, so that the level difference is reduced layer by layer, and a large level difference can be changed into a plurality of small level differences after winding;
(2) the invention utilizes the adhesive layers among the layers, and can ensure that the section difference multilayer composite film is attached to the core pipe under the condition of not additionally using adhesive glue, thereby being more convenient to wind;
(3) the invention coats the buffer material on the outer surface of the core tube, and when the multilayer film cut by layers and sections is attached to the core tube, the buffer material on the surface of the core tube can absorb the section difference of each section of the core, thereby greatly reducing the section difference of the whole core.
Drawings
FIG. 1 is a schematic view of a protective film according to the present invention;
FIG. 2 is a schematic view of an rupture disk of the present invention;
FIG. 3 is a schematic view of a roll of the rupture disk of the present invention after being wound;
FIG. 4 is a schematic view of a stepped film without an adhesive layer according to the present invention;
FIG. 5 is a schematic view of a protective film for level difference according to the present invention;
FIG. 6 is a schematic view of a burst membrane according to the present invention;
FIG. 7 is a schematic illustration of a log in examples 1 and 2;
FIG. 8 is a schematic view of a poor coiled material in examples 3 to 9.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
The multilayer composite film has various types, and as shown in fig. 1, the protective film comprises three layers, namely a release film, an adhesive layer and a PET film from inside to outside, wherein the PET film, the adhesive layer and the release film are sequentially attached; the explosion-proof membrane shown in fig. 2 comprises five layers, namely a release membrane, an OCA (optically clear adhesive) layer, a hard coating, an adhesive layer and a PET (polyethylene terephthalate) membrane from inside to outside, wherein the PET membrane, the adhesive layer, the hard coating, the OCA adhesive layer and the release membrane are sequentially attached. As shown in fig. 3, the rupture membrane may have a step difference due to the adhesion with the core tube during the winding process, the presence of the step difference of the winding core may result in poor appearance of the roll, indentation may occur in the winding core portion after the roll is curled, and the performance of the multilayer membrane may be affected due to the non-concentration of stress. And the larger the film thickness is, the larger the step difference generated by the lamination with the core tube during the winding process is, the more easily the appearance failure is caused, the indentation is caused and the performance is reduced.
Therefore, the multilayer structure of the multilayer composite film is utilized to carry out layered and segmented cutting on the starting end of the multilayer composite film, so that the segment difference can be reduced layer by layer. The step difference film without the adhesive layer as shown in fig. 4 comprises four layers: the first layer, the second layer, the third layer and the fourth layer are respectively arranged from inside to outside, and at the starting end of the section difference film along the length direction, the second layer protrudes out of the first layer, the third layer protrudes out of the second layer, and so on. As shown in fig. 5, at the beginning of the step difference protective film along the length direction, the PET film and the adhesive layer are flush and protrude from the release film together. As shown in fig. 6, at the starting end along the length direction, the PET film and the adhesive layer are flush and protrude from the hard coating film together, and the hard coating film and the OCA adhesive layer are flush and protrude from the release film together.
As shown in fig. 7, in the process of winding the step explosion-proof membrane around the core tube, the step explosion-proof membrane and the core tube can be bonded by the adhesive layer between the layers without using an additional adhesive, so that the winding can be performed more conveniently.
As shown in fig. 8, when the buffer material is coated on the outer surface of the core tube and the level difference rupture film is attached to the core tube, the buffer material on the surface of the core tube can absorb the level difference of each level of the core, so that the level difference of the whole core can be greatly reduced.
Comparative examples 1 to 9:
the coil stock in comparative examples 1 to 9 includes a multilayer composite film and a core tube, wherein the multilayer composite film is wound around the core tube from the starting end, and the above-mentioned explosion-proof film is selected as the multilayer composite film. The preparation method of the coiled material comprises the following steps:
(1) fixing a common adhesive tape on the core pipe;
(2) sequentially attaching the explosion-proof film, the common adhesive tape and the core pipe;
(3) and applying a certain coiling tension to the explosion-proof membrane from the starting end to wind the explosion-proof membrane around the core pipe, thus obtaining the required coiled material.
The common adhesive tape can also be replaced by an adhesive, the adhesive is coated on the core pipe, and the explosion-proof membrane is attached to the core pipe under the semi-dry state of the adhesive.
Examples 1 to 9:
the middle-segment-difference coiled materials in embodiments 1 to 9 include a middle-segment-difference multilayer composite film and a core tube, wherein the middle-segment-difference multilayer composite film is the above-mentioned middle-segment-difference rupture membrane, the middle-segment-difference rupture membrane is wound on the core tube from the starting end, and two adhesive layers exposed due to protrusion are attached to the core tube. The preparation method of the segment difference coiled material comprises the following steps:
(1) the explosion-proof membrane is cut in a layered and sectional manner from the outer layer to the inner layer along the starting end in the length direction, namely: cutting off the hardened film and the release film coated with the OCA adhesive layer at a position of a few millimeters from the edge of the PET film coated with the adhesive layer, and then cutting off the release film at a position of a few millimeters from the cut edge so that the starting ends of the outer layers in two adjacent layers of the explosion-proof film in the length direction protrude out of the inner layer, thus obtaining the required section difference explosion-proof film;
(2) attaching the innermost layer (release film) of the section difference explosion-proof film to the core pipe, and attaching the two exposed adhesive layers to the core pipe;
(3) and applying a certain coiling tension to the section difference explosion-proof membrane from the starting end to wind the membrane around the core pipe, thus obtaining the section difference coiled material.
The parameters of the core tube type, the size, and the thickness of the cushioning material and the test results in comparative examples 1 to 9 and examples 1 to 9 are shown in table 1.
In table 1, the experimental multilayer composite film is the above-described explosion-proof film, and includes five layers, two of which are adhesive layers. The test method is as follows: according to each condition, the common adhesive tape is used for fixing the explosion-proof film and the three-section cut section difference explosion-proof film is not used for fixing the common adhesive tape, the influence (the number of winding layers) generated by the section difference part and the section difference of the film is visually checked, namely the wound adhesive tape is peeled and unfolded, and the remaining winding layers are not formed when obvious section difference marks are not seen on the film plane.
As can be seen from table 1, compared to the common tape stationary phase, the method using three-stage cutting can have an effect of more than 50%, and if the method is used in combination with a core tube coated with a buffer material, the method can have an effect of more than 95%. However, the thickness of the buffer material needs to be 2-3 times of the thickness (280 μm) of the explosion-proof film, i.e. the buffer material is 1000 μm thick, and a thicker buffer material cannot achieve a better effect. As in comparative example 9, even if the buffer material was increased to 2650 μm, no more excellent effect was obtained.
The present invention is not limited to the above embodiments, and any layered material, whether a protective film, an explosion-proof film or other multi-layered composite films, including an adhesive layer between the composite films, may fall within the scope of the present invention as long as the layered material is cut in layers and sections.
Table 1 experimental parameters and test results of comparative examples and examples
Claims (5)
1. A level difference multilayer composite film characterized by: the outer layer is attached to the inner layer, and the starting end of the outer layer in the two adjacent layers in the length direction protrudes out of the inner layer; the adhesive layer is arranged between the layers of the multi-layer composite film with the segment difference, and the starting end of the adhesive layer in the length direction is flush with the adjacent outer layer and protrudes out of the adjacent inner layer.
2. A method of preparing a stepped multilayer composite film according to claim 1, comprising the steps of:
(1) the multilayer composite film is formed by laminating at least two layers inside and outside;
(2) and carrying out layered and sectional cutting on the multilayer composite film from the outer layer to the inner layer along the starting end in the length direction, so that the outer layer of two adjacent layers of the starting end protrudes out of the inner layer, and thus obtaining the required stepped multilayer composite film.
3. A stepped web utilizing the stepped multilayer composite film of claim 1, wherein: the composite core comprises a core tube and a multi-layer composite film with different sections, wherein the innermost layer of the multi-layer composite film with different sections is attached to the core tube, and the multi-layer composite film with different sections is wound on the core tube from the starting end.
4. The stepped differential web of claim 3, wherein: the outer surface of the core pipe is coated with a buffer material.
5. A method for producing a stepped coil stock according to claim 3, characterized by comprising the steps of:
(1) attaching the innermost layer of the multi-layer composite film with the section difference to the core pipe;
(2) and applying a certain coiling tension to the level difference multilayer composite film from the starting end to wind the multilayer composite film around the core pipe to obtain the required level difference coiled material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711484111.4A CN109575829B (en) | 2017-12-29 | 2017-12-29 | Segment difference multilayer composite film and coiled material and preparation method thereof |
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| CN201711484111.4A CN109575829B (en) | 2017-12-29 | 2017-12-29 | Segment difference multilayer composite film and coiled material and preparation method thereof |
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| Publication Number | Publication Date |
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| CN109575829A CN109575829A (en) | 2019-04-05 |
| CN109575829B true CN109575829B (en) | 2021-05-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113928882B (en) * | 2021-10-19 | 2022-12-20 | 北京航空航天大学 | Thick pod rod stretching device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1923654A (en) * | 2005-08-31 | 2007-03-07 | 日立化成工业株式会社 | Felting agent coil |
| CN101484313A (en) * | 2006-07-06 | 2009-07-15 | 日东电工株式会社 | Release liner, adhesive tape, and adhesive tape-wound body |
| CN203794358U (en) * | 2014-04-30 | 2014-08-27 | 世联汽车内饰（苏州）有限公司 | Section difference paper tube |
| CN104334668A (en) * | 2012-05-25 | 2015-02-04 | 日立化成株式会社 | Winding core and roll |
| CN106081742A (en) * | 2016-08-02 | 2016-11-09 | 苏州东山精密制造股份有限公司 | A kind of film bobbin |
-
2017
- 2017-12-29 CN CN201711484111.4A patent/CN109575829B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1923654A (en) * | 2005-08-31 | 2007-03-07 | 日立化成工业株式会社 | Felting agent coil |
| CN101484313A (en) * | 2006-07-06 | 2009-07-15 | 日东电工株式会社 | Release liner, adhesive tape, and adhesive tape-wound body |
| CN104334668A (en) * | 2012-05-25 | 2015-02-04 | 日立化成株式会社 | Winding core and roll |
| CN203794358U (en) * | 2014-04-30 | 2014-08-27 | 世联汽车内饰（苏州）有限公司 | Section difference paper tube |
| CN106081742A (en) * | 2016-08-02 | 2016-11-09 | 苏州东山精密制造股份有限公司 | A kind of film bobbin |
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| CN109575829A (en) | 2019-04-05 |
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