CN115260936A

CN115260936A - CPP protective film with multilayer composite structure and compounding method thereof

Info

Publication number: CN115260936A
Application number: CN202210848266.6A
Authority: CN
Inventors: 陈善文; 洪秀川
Original assignee: Dongguan Yihong Industrial Co ltd
Current assignee: Dongguan Yihong Industrial Co ltd
Priority date: 2022-07-19
Filing date: 2022-07-19
Publication date: 2022-11-01

Abstract

The invention discloses a CPP protective film with a multilayer composite structure and a compounding method thereof, relating to the technical field of multilayer compounding of CPP protective films, the problem of just increase multilayer structure's complex film compliance among the prior art, paste and peel off when being convenient for later stage use, but the practicality is weaker to influence the complex film in service behavior is solved. The polypropylene substrate layer is arranged inside the polypropylene composite film body; the first EVOH film layer is arranged above the polypropylene substrate layer, and a first nylon optical film layer is arranged above the first EVOH film layer; a second EVOH film layer arranged below the polypropylene substrate layer, a second nylon Long Guang film layer is arranged below the second EVOH film layer, glue composite layers are arranged on the upper end face and the lower end face of the polypropylene substrate layer, and the lower surface of the first EVOH film layer and the upper surface of the second EVOH film layer are connected with the upper end face and the lower end face of the polypropylene substrate layer in a sticking way through glue composite layers.

Description

CPP protective film with multilayer composite structure and compounding method thereof

Technical Field

The invention relates to the technical field of CPP protective film compounding, in particular to a CPP protective film with a multilayer composite structure and a compounding method thereof.

Background

The CPP protective film is a casting polypropylene protective film, which is a non-stretching and non-oriented polypropylene protective film. The CPP is divided into homopolymerization CPP and copolymerization CPP according to raw materials, the CPP is divided into general CPP, aluminized CPP (WMCPP), cooked CPP (RCPP) and the like according to the function and application. The CPP protective film is mainly suitable for photoelectric films, diffusion sheets, light guide plates, films and prism sheets, and is particularly suitable for ITO conductive protective film coating and electronic manufacturing process flows such as IMD, IML and the like;

for example, chinese copyright patent No. CN210656781U (a multilayer composite film): the PET protective layer comprises a first PET protective layer, a second PET protective layer and a bonding layer, wherein the second PET protective layer is stacked above the first PET protective layer, the bonding layer is arranged between the first PET protective layer and the second PET protective layer, the upper surface of the second PET protective layer is coated with a coating layer, and the coating layer is formed by coating a release agent on the upper surface of the second PET protective layer or coating an adhesive on the upper surface of the second PET protective layer; the thickness of the composite film is between 0.2-0.3 mm;

however, in the prior art, the softness of the composite film with a multilayer structure is only increased, so that the composite film can be conveniently pasted and peeled in the later use process, but the practicability is weaker, so that the use condition of the composite film is influenced; therefore, the existing requirements are not met, and a CPP protective film with a multilayer composite structure and a composite method thereof are provided.

Disclosure of Invention

The invention aims to provide a CPP protective film with a multilayer composite structure and a compounding method thereof, and aims to solve the problem that the use condition of the composite film is influenced because the flexibility of the composite film with the multilayer structure is only increased, so that the composite film is convenient to stick and peel in later use and has weaker practical performance in the prior art proposed in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: a CPP protection film with a multilayer composite structure and a compounding method thereof comprise a polypropylene composite film roll and a polypropylene composite film body, wherein the polypropylene composite film roll is provided with the polypropylene composite film body, a composite film roll core is arranged inside the polypropylene composite film roll, the polypropylene composite film body is wound and connected with the composite film roll core, one side of the polypropylene composite film body is provided with a fixed adhesive tape, and the fixed adhesive tape is connected with the polypropylene composite film body in a sticking way;

and also the method comprises the following steps:

the polypropylene substrate layer is arranged inside the polypropylene composite film body;

the first EVOH film layer is arranged above the polypropylene substrate layer, and a first nylon optical film layer is arranged above the first EVOH film layer;

and the second EVOH film layer is arranged below the polypropylene substrate layer, and the second nylon optical film layer is arranged below the second EVOH film layer.

Preferably, the upper end face and the lower end face of the polypropylene substrate layer are both provided with glue composite layers, and the lower surface of the first EVOH film layer and the upper surface of the second EVOH film layer are connected with the upper end face and the lower end face of the polypropylene substrate layer through the glue composite layers in a sticking mode.

Preferably, the upper surface of the first EVOH film layer is provided with a glue composite layer, the lower surface of the second EVOH film layer is provided with a glue composite layer, and the upper surface of the first EVOH film layer and the lower surface of the second EVOH film layer are respectively connected with the lower surface of the first nylon Long Guang film layer and the upper surface of the second nylon optical film layer in a sticking manner through the glue composite layers.

Preferably, the lower surface of polypropylene composite film body is provided with the complex film and pastes the layer, the lower surface mounting that the layer was pasted to the complex film has the complex film to leave the type layer, and the complex film leaves the type layer and paste the layer through the complex film and paste with the polypropylene composite film body and be connected.

Preferably, the two sides of the polypropylene composite film roll are provided with two placing plates, the lower part of each placing plate is provided with a supporting and fixing plate, the supporting and fixing plate is provided with an installation connecting groove, and the placing plates are connected with the supporting and fixing plate in a sliding mode through the installation connecting grooves.

Preferably, a motor is installed on one end face of the placing plate, and a turntable is arranged on the other end face of the placing plate.

Preferably, one side of carousel is provided with the connecting roll, spacing disc is all installed to the both sides on connecting roll surface.

Preferably, fixing bottom plates are installed on the end faces of the two sides of the bottom of the placing plate, and fixing screws are installed on the fixing bottom plates.

Preferably, the CPP protective film with a multilayer composite structure and the composite method thereof comprise the following steps:

step 1: firstly, adding a certain proportion of CPP polypropylene plastic particles as a base material raw material, pouring the base material raw material into a material tank, stirring the base material raw material and other ingredients, mixing to obtain a mixture, uniformly stirring, then filling the mixture into a raw material bag, and preparing to add the mixture into a hopper;

step 2: after the parameters of the extruder are adjusted, pouring resin particles into a hopper, changing a filter screen after the temperature of each zone of the extruder reaches the preheating temperature, slowing down the speed of a main machine, after a film is extruded, lifting the film from a die head by an operator, starting a blowing valve, slowly lifting and blowing the film between two first-traction rollers, clamping a traction roller, then adjusting the size of the stored valve, and controlling the width and the thickness of the film, thereby blowing the film;

and step 3: before blow molding, the composite film is subjected to impact treatment by a high-voltage electric arc to ensure that the surface of the composite film has certain roughness, the corona surface reaches more than 40dn/cm just before the composite film is taken off a machine, and meanwhile, the corona machine is not close to a high-voltage discharge position when being started;

and 4, step 4: after the composite film is typeset and platemade, checking whether the plate surface has the phenomena of collision, bump, collision, chromium drop and the like, whether an impressing rubber roll has sand holes, pits, scratches and the like, whether the electricity, gas and electricity consumption and the operation of the machine are normal or not, loading the rubber roll, loading a printing roller, printing ink, loading a cutter, grinding a knife, loading a waste film, correcting and proofing according to the requirements of a production process sheet, connecting a PA nylon optical film after the color is close to that of a sample draft and overprinting is normal, and printing when the machine is started;

and 5: preparing a screen wire rod, a gluing pressing rod, glue, a solvent, a doctor blade, a film and the like by adopting a dry compounding method, adjusting the temperature of an oven, the temperature of a hot drum and air exhaust, using a waste film corrector to start production after reaching certain initial peel strength and gluing amount, coating an adhesive on a plastic film, then pasting a PA nylon optical film and an EVOH ethylene-vinyl alcohol copolymer film on the film, volatilizing the redundant solvent through a drying channel, and then pressing the other plastic film together by using a hot pressing roller to form a composite film;

step 6: and finally, rolling, slitting and packaging the prepared composite film.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the first EVOH film layer, the first nylon Long Guang film layer, the second EVOH film layer and the second nylon optical film layer are respectively arranged on the upper end face and the lower end face of the polypropylene base material layer, and are respectively bonded and compounded through the glue composite layer, the two nylon optical film layers and the two EVOH film layers are utilized to form the barrier layers on the upper end face and the lower end face of the polypropylene base material layer, the nylon optical film layers have waterproof, scratch-proof and attractive effects, and the EVOH film layers have wear-resistant and antistatic effects, so that the composite film has the functions as well, the practicability of the composite film is improved, and the problem that the softness of the composite film with a multi-layer structure is only increased in the prior art, the adhesion and stripping are convenient in the later use process, but the practicability is weak, and the use condition of the composite film is influenced is solved.

2. Through setting up the nylon light rete at the surface of EVOH rete, can enough improve its puncture resistance, increased the intensity on EVOH layer again, improved the crack resistance on EVOH layer, avoided EVOH layer receiving external force damage and leading to the problem of its result of use's decline.

3. The board is placed through setting up in the both sides that the polypropylene composite film was rolled up, can roll up the polypropylene composite film and put on placing the connecting roller of board through rolling up the core during use, conveniently use it, the in-process that uses simultaneously can utilize spacing disc on the connecting roller to carry on spacingly to the both sides that the polypropylene composite film was rolled up, avoid the complex film condition in disorder to appear, can slide at support fixed plate through placing the board when putting simultaneously, come the composite film to roll up the installation to fix on its connecting roller, convenient operation.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a CPP protective film of a multilayer composite structure according to the present invention;

FIG. 2 is an enlarged schematic view of the structure of the polypropylene composite film roll of the present invention;

FIG. 3 is an enlarged schematic view of a CPP protective film structure of a multilayer composite structure of the present invention;

FIG. 4 is an enlarged schematic view of the internal structure of a CPP protective film of a multilayer composite structure of the present invention;

FIG. 5 is a schematic diagram of the compounding step of the CPP protective film of the multilayer composite structure of the present invention;

in the figure: 1. a polypropylene composite film roll; 2. a polypropylene composite film body; 3. placing the plate; 4. a turntable; 5. a connecting roller; 6. a limiting disc; 7. a support fixing plate; 8. mounting a connecting groove; 9. fixing the bottom plate; 10. a fixing screw; 11. a motor; 12. a composite film roll core; 13. fixing an adhesive tape; 14. a composite film adhesive layer; 15. a composite film release layer; 16. a first EVOH film layer; 17. first ni Long Guang film layer; 18. glue compound layer; 19. a polypropylene substrate layer; 20. a second EVOH film layer; 21. and a second nylon light film layer.

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.

Referring to fig. 1-5, an embodiment of the present invention is shown: a CPP protective film with a multilayer composite structure and a compounding method thereof comprise a polypropylene composite film roll 1 and a polypropylene composite film body 2, wherein the polypropylene composite film roll 1 is provided with the polypropylene composite film body 2, the polypropylene composite film roll 1 is internally provided with a composite film roll core 12, the polypropylene composite film body 2 is wound and connected with the composite film roll core 12, one side of the polypropylene composite film body 2 is provided with a fixed adhesive tape 13, and the fixed adhesive tape 13 is connected with the polypropylene composite film body 2 in a sticking way;

further comprising:

a polypropylene base material layer 19 provided inside the polypropylene composite film body 2;

a first EVOH film layer 16 disposed over the polypropylene substrate layer 19, the first nylon light film layer 17 being disposed over the first EVOH film layer 16;

and a second EVOH film layer 20 disposed below the polypropylene substrate layer 19, wherein a second nylon Long Guang film layer 21 is disposed below the second EVOH film layer 20.

Referring to fig. 4, the upper and lower end surfaces of the polypropylene substrate layer 19 are both provided with glue composite layers 18, and the lower surface of the first EVOH film layer 16 and the upper surface of the second EVOH film layer 20 are bonded to the upper and lower end surfaces of the polypropylene substrate layer 19 through the glue composite layers 18, so that the lower surface of the first EVOH film layer 16 and the second EVOH film layer 20 are fixedly connected to the polypropylene substrate layer 19.

Referring to fig. 4, a glue composite layer 18 is disposed on the upper surface of the first EVOH film layer 16, a glue composite layer 18 is disposed on the lower surface of the second EVOH film layer 20, and the upper surface of the first EVOH film layer 16 and the lower surface of the second EVOH film layer 20 are respectively bonded to the lower surface of the first nylon optical film layer 17 and the upper surface of the second nylon optical film layer 21 through the glue composite layer 18, so that the first nylon optical film layer 17 and the second nylon optical film layer 21 are fixedly connected to the lower surface of the first EVOH film layer 16 and the second EVOH film layer 20.

Referring to fig. 3, a composite film adhesive layer 14 is disposed on the lower surface of the polypropylene composite film body 2, a composite film release layer 15 is disposed on the lower surface of the composite film adhesive layer 14, and the composite film release layer 15 is adhered to the polypropylene composite film body 2 through the composite film adhesive layer 14, so as to facilitate fixing and using of the composite film.

Referring to fig. 1, two placing plates 3 are disposed on two sides of a polypropylene composite film roll 1, two placing plates 3 are disposed, a supporting and fixing plate 7 is disposed below the placing plates 3, an installing and connecting groove 8 is disposed on the supporting and fixing plate 7, and the placing plates 3 are slidably connected with the supporting and fixing plate 7 through the installing and connecting groove 8, so that the operation is convenient.

Referring to fig. 1, a motor 11 is installed on one end surface of the placing plate 3, and a turntable 4 is installed on the other end surface of the placing plate 3, so that the film roll can rotate when in use.

Referring to fig. 1, a connecting roller 5 is disposed on one side of a rotating disk 4, and limiting disks 6 are disposed on both sides of the surface of the connecting roller 5, so as to prevent the composite film from being scattered.

Referring to fig. 1, the two side end faces of the bottom of the placing plate 3 are both provided with a fixing bottom plate 9, and the fixing bottom plate 9 is provided with a fixing screw 10, so that the film roll can be conveniently placed.

Referring to fig. 5, a CPP protective film having a multi-layer composite structure and a method for forming the same includes the following steps:

and 6: and finally, rolling, slitting and packaging the prepared composite film.

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.

Claims

1. A CPP protection film with a multilayer composite structure comprises a polypropylene composite film roll (1) and a polypropylene composite film body (2), wherein the polypropylene composite film roll (1) is provided with the polypropylene composite film body (2), a composite film roll core (12) is arranged inside the polypropylene composite film roll (1), the polypropylene composite film body (2) is wound and connected with the composite film roll core (12), one side of the polypropylene composite film body (2) is provided with a fixed adhesive tape (13), and the fixed adhesive tape (13) is connected with the polypropylene composite film body (2) in a sticking way;

the method is characterized in that: further comprising:

a polypropylene base material layer (19) provided inside the polypropylene composite film body (2);

a first EVOH film layer (16) disposed over the polypropylene substrate layer (19), a first nylon light film layer (17) disposed over the first EVOH film layer (16);

a second EVOH film layer (20) disposed below the polypropylene substrate layer (19), the second EVOH film layer (20) having a second nylon light film layer (21) disposed below it.

2. The CPP protective film with a multilayer composite structure as claimed in claim 1, wherein: the upper end face and the lower end face of the polypropylene base material layer (19) are both provided with glue composite layers (18), and the lower surface of the first EVOH film layer (16) and the upper surface of the second EVOH film layer (20) are connected with the upper end face and the lower end face of the polypropylene base material layer (19) in a sticking mode through the glue composite layers (18).

3. A CPP protective film having a multilayer composite structure according to claim 2, characterized in that: the upper surface of the first EVOH film layer (16) is provided with a glue composite layer (18), the lower surface of the second EVOH film layer (20) is provided with the glue composite layer (18), and the upper surface of the first EVOH film layer (16) and the lower surface of the second EVOH film layer (20) are respectively connected with the lower surface of the first nylon Long Guang film layer (17) and the upper surface of the second nylon optical film layer (21) in a sticking mode through the glue composite layer (18).

4. A CPP protective film having a multilayer composite structure according to claim 1, characterized in that: the lower surface of polypropylene complex film body (2) is provided with that the complex film pastes layer (14), the lower surface mounting that the layer (14) was pasted to the complex film has complex film from type layer (15), and the complex film pastes layer (14) through the complex film from type layer (15) and pastes with polypropylene complex film body (2) and be connected.

5. The CPP protective film with a multilayer composite structure as claimed in claim 1, wherein: the polypropylene composite film roll is characterized in that two placing plates (3) are arranged on two sides of the polypropylene composite film roll (1), two placing plates (3) are arranged, a supporting and fixing plate (7) is arranged below the placing plates (3), an installing connecting groove (8) is formed in the supporting and fixing plate (7), and the placing plates (3) are connected with the supporting and fixing plate (7) in a sliding mode through the installing connecting groove (8).

6. A CPP protective film having a multilayer composite structure according to claim 5, characterized in that: a motor (11) is installed on one side end face of the placing plate (3), and a turntable (4) is arranged on the other side end face of the placing plate (3).

7. The CPP protective film with a multilayer composite structure according to claim 6, wherein: one side of carousel (4) is provided with connecting roller (5), spacing disc (6) are all installed to the both sides on connecting roller (5) surface.

8. A CPP protective film having a multilayer composite structure according to claim 5: the method is characterized in that: the fixing device is characterized in that fixing bottom plates (9) are installed on the end faces of the two sides of the bottom of the placing plate (3), and fixing screws (10) are installed on the fixing bottom plates (9).

9. A method for compositing a CPP protective film with a multilayer composite structure, which is realized based on the CPP protective film of any one of claims 1 to 8, and is characterized by comprising the following steps:

and step 3: before blow molding, the composite film is subjected to impact treatment by high-voltage electric arc to ensure that the surface of the composite film has certain roughness, the corona surface reaches more than 40dn/cm when the composite film is just taken off a machine, and meanwhile, the composite film is not close to a high-voltage discharge position when a corona machine is started;

and 4, step 4: after the composite film is typeset and platemade, checking whether the plate surface has the phenomena of knocking, bumping, colliding, chromium removal and the like, whether the impressing rubber roller has sand holes, pot holes, scratches and the like, whether the electricity, gas and electric heating and operation of the machine are normal or not, loading the rubber roller, loading a printing roller, applying printing ink, loading a cutter, grinding a cutter, performing sample correction by a waste film corrector according to the requirement of a production process sheet, connecting a PA nylon light film after the color is close to a sample draft and overprinting is normal, and printing when the printing is started;