CN115353821A - High-temperature-resistant PE protective film easy to cut and preparation method thereof - Google Patents
High-temperature-resistant PE protective film easy to cut and preparation method thereof Download PDFInfo
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- CN115353821A CN115353821A CN202111260052.9A CN202111260052A CN115353821A CN 115353821 A CN115353821 A CN 115353821A CN 202111260052 A CN202111260052 A CN 202111260052A CN 115353821 A CN115353821 A CN 115353821A
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- 230000001681 protective effect Effects 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 239000010410 layer Substances 0.000 claims abstract description 131
- -1 polyethylene Polymers 0.000 claims abstract description 67
- 239000004698 Polyethylene Substances 0.000 claims abstract description 62
- 229920000573 polyethylene Polymers 0.000 claims abstract description 25
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims abstract description 22
- 239000000758 substrate Substances 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 10
- 239000004743 Polypropylene Substances 0.000 claims description 32
- 229920001155 polypropylene Polymers 0.000 claims description 32
- 239000002994 raw material Substances 0.000 claims description 27
- 239000000155 melt Substances 0.000 claims description 18
- 239000003795 chemical substances by application Substances 0.000 claims description 14
- 238000001723 curing Methods 0.000 claims description 10
- 238000007664 blowing Methods 0.000 claims description 9
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 9
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 239000000428 dust Substances 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 5
- 238000010096 film blowing Methods 0.000 claims description 5
- 238000007756 gravure coating Methods 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 abstract description 12
- 238000013461 design Methods 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- 229920001684 low density polyethylene Polymers 0.000 description 20
- 239000004702 low-density polyethylene Substances 0.000 description 20
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 13
- 239000004642 Polyimide Substances 0.000 description 8
- 229920001721 polyimide Polymers 0.000 description 8
- 239000000126 substance Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 239000005011 phenolic resin Substances 0.000 description 5
- 229920001568 phenolic resin Polymers 0.000 description 5
- 238000003889 chemical engineering Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 239000005058 Isophorone diisocyanate Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 3
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical class OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 2
- 101150033824 PAA1 gene Proteins 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- 239000004712 Metallocene polyethylene (PE-MC) Substances 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000006184 cosolvent Substances 0.000 description 1
- 239000002173 cutting fluid Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 125000004029 hydroxymethyl group Chemical group [H]OC([H])([H])* 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 235000012424 soybean oil Nutrition 0.000 description 1
- 239000003549 soybean oil Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
-
- 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
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
-
- 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
- C09J179/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09J161/00 - C09J177/00
- C09J179/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C09J179/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
-
- 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
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
-
- 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
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
- C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/385—Acrylic polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
-
- 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
- C09J2301/16—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the structure of the carrier layer
-
- 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
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
-
- 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
- C09J2423/00—Presence of polyolefin
- C09J2423/04—Presence of homo or copolymers of ethene
- C09J2423/046—Presence of homo or copolymers of ethene in the substrate
-
- 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
- C09J2423/00—Presence of polyolefin
- C09J2423/10—Presence of homo or copolymers of propene
- C09J2423/106—Presence of homo or copolymers of propene in the substrate
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Adhesive Tapes (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention relates to the field of C09J7/02, in particular to a high-temperature-resistant PE (polyethylene) protective film easy to cut and a preparation method thereof, wherein the PE protective film comprises a base material layer and a pressure-sensitive adhesive layer, and the thickness ratio of the base material layer to the pressure-sensitive adhesive layer is (3-8): 1. according to the invention, through the design of the outer layer, the middle layer and the inner layer, the prepared substrate layer has good flexibility, good brittleness and stiffness, easy cutting, and neat edge during cutting, and has no problem of edge separation after cutting.
Description
Technical Field
The invention relates to the field of C09J7/02, in particular to a high-temperature-resistant PE protective film easy to cut and a preparation method thereof.
Background
In the CNC processing, the PE protective film is generally used to protect the adherend from breakage and corrosion by the cutting fluid, its moderate peel strength contributes to peeling of the protective film, and the protective film is required to have excellent polymer stability, which prevents transfer of the pressure sensitive adhesive to the adherend through the CNC processing treatment, residual adhesive at the lifted portion of the protective film after acid washing, and edge lifting after CNC cutting.
CN104927693A discloses a method for preparing optical-grade PE protective film, which adopts low-density polyethylene and metallocene polyethylene to blend, the prepared PE protective film has no adhesive residue and is easy to peel, but has poor high temperature resistance, and is easy to wrinkle and curl up when working at high temperature.
CN201910134652.7 discloses a PE protective film, which is added with a retraction-resistant layer to prevent the retraction phenomenon during use, but the brittleness of the protective film is increased, and the edge cracks are irregular during cutting.
Therefore, the PE protective film in the prior art still has many problems, and it is necessary to develop a PE protective film which is easy to cut and resistant to high temperature.
Disclosure of Invention
The first aspect of the invention provides an easily-cut high-temperature-resistant PE protective film, which comprises a substrate layer and a pressure-sensitive adhesive layer, wherein the thickness ratio of the substrate layer to the pressure-sensitive adhesive layer is (3-8): 1.
as a preferred embodiment, the structure of the substrate layer comprises an outer layer, a middle layer and an inner layer, and the raw materials for preparing the outer layer, the middle layer and the inner layer all comprise polyethylene and polypropylene.
As a preferred embodiment, the outer layer is prepared from the following raw materials: 60-80 parts of polyethylene and 20-40 parts of polypropylene.
Preferably, the raw materials for preparing the outer layer comprise: 70 parts of polyethylene and 30 parts of polypropylene by weight.
As a preferred embodiment, the polyethylene in the outer layer has a melt index (230 ℃/2.16 kg) of 20 to 30g/10min.
The outer layer has the advantages of low melt index, high brittleness of the protective film, irregular cutting edge, low melt index and easy damage of the protective film, preferably, the polyethylene in the outer layer is low-density polyethylene, the melt index (230 ℃/2.16 kg) is 22g/10min, and the polyethylene is purchased from Exxon Mobil chemical industry and has the model number of LD650.
As a preferred embodiment, the flexural modulus of the polypropylene in the outer layer is between 1000 and 1200MPa.
Preferably, the polypropylene in the outer layer has a flexural modulus of 1180MPa, and is purchased from Yingcang plastification Co., ltd, model number M30RH.
The applicant finds that the prepared protective film has moderate brittleness of the outer layer, good scratch resistance and regular cutting edge under the condition of compounding polyethylene with a specific melt index and polypropylene.
As a preferred embodiment, the raw material for preparing the middle layer includes: according to parts by weight, 20-30 parts of polyethylene, 40-60 parts of linear low density polyethylene and 20-20 parts of polypropylene.
Preferably, the preparation raw material of the middle layer comprises: 25 parts of polyethylene, 50 parts of linear low-density polyethylene and 25 parts of polypropylene.
In order to adjust the flexibility and peeling ease of the protective film, LLDPE is added, and as a preferred embodiment, the melt index of the linear low density polyethylene is 2 to 20g/10min.
Preferably, the linear low density polyethylene has a melt index (230 ℃/2.16 kg) of 5g/10min, as purchased from Exxon Mobil chemical, model LL8446.21.
As a preferred embodiment, the raw materials for preparing the inner layer include: 60-80 parts of polyethylene and 20-40 parts of polypropylene.
Preferably, the raw materials for preparing the inner layer comprise: 65 parts of polyethylene and 40 parts of polypropylene in parts by weight.
As a preferred embodiment, the polyethylene in the inner layer has a melt index (230 ℃/2.16 kg) of 50 to 100g/10min.
Preferably, the polyethylene in the inner layer is low density polyethylene, has a melt index (230 ℃/2.16 kg) of 70g/10min, is purchased from Exxon Mobil chemical and has the model number LD654.
As a preferred embodiment, the melt index (230 ℃/2.16 kg) of the polypropylene in the inner layer is from 10 to 40g/10min.
Preferably, the melt index (230 ℃/2.16 kg) of the polypropylene in the inner layer is 36g/10min, which is commercially available from Exxon Mobil chemical as model number PP3155E3.
The polyethylene and the polypropylene with specific melt index in the inner layer are compounded, so that the compatibility and the adhesiveness of the inner layer and the pressure-sensitive adhesive layer can be improved to the greatest extent.
As a preferred embodiment, the weight ratio of the preparation raw materials of the outer layer, the middle layer and the inner layer is (1-3): (2-6): 1.
in order to balance the stability between the toughness and the easy cutting performance of the PE protective film, the weight ratio of the raw materials for preparing the outer layer, the middle layer and the inner layer is preferably 2:5:1.
the preparation method of the substrate layer comprises the following steps: the preparation raw materials of the outer layer, the middle layer and the inner layer are respectively put into a three-layer co-solvent film blowing machine with a dust removal system, and the three-layer melt co-extrusion, the stainless steel filter screen blow filtration and the blowing are carried out to prepare the substrate layer.
As a preferred embodiment, the raw materials for preparing the pressure-sensitive adhesive layer comprise, by weight: 15-30 parts of acrylic ester, 15-30 parts of polyimide, 5-10 parts of ethyl acetate, 2-7 parts of a melting aid and 0.5-3 parts of a curing agent.
Preferably, the preparation raw materials of the pressure-sensitive adhesive layer comprise, by weight: 20 parts of acrylic ester, 20 parts of polyimide, 6 parts of ethyl acetate, 4 parts of a melting aid and 1 part of a curing agent.
In order to achieve high adhesion of the pressure-sensitive adhesive layer, it is preferred that the polyimide has a viscosity (30 ℃) of 8000 to 20000mPa.s, which is available from Ann New materials, inc., changzhou under the type PAA-1.
In a preferred embodiment, the fluxing agent comprises at least one of petroleum resin, alkyl phenolic resin, rosin, epoxidized soybean oil.
Preferably, the fluxing agent is alkyl phenolic resin.
In order to achieve a balance between high adhesion and peel residue free, the alkylphenol formaldehyde resin preferably has a methylol content of 12-16% and is available from Kyowa dry R.C. synthetic materials technology, inc. under model number FRJ-551.
The present invention is not particularly limited in kind of curing agent, and the curing agent conventionally used in the art may be of any kind, including but not limited to isophorone diisocyanate.
The preparation method of the pressure-sensitive adhesive layer comprises the steps of uniformly mixing acrylic ester, polyimide, ethyl acetate, a fluxing agent and a curing agent, coating the mixture on the surface of the base material layer by a gravure coating method, and drying and curing.
The second aspect of the invention provides a preparation method of a high-temperature resistant PE protective film easy to cut, which comprises the following steps: (1) Respectively putting the preparation raw materials of the outer layer, the middle layer and the inner layer into a three-layer co-agent film blowing machine with a dust removal system, and preparing a substrate layer through three-layer melt co-extrusion, stainless steel filter screen blowing and blowing; (2) And coating a pressure-sensitive adhesive layer on the surface of the substrate layer by a gravure coating method, drying, curing and rolling to obtain the pressure-sensitive adhesive layer.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, through the design of the outer layer, the middle layer and the inner layer, the prepared substrate layer has good flexibility, good brittleness and stiffness, easy cutting, and neat edge during cutting, and has no problem of edge separation after cutting.
2. The PE protective film disclosed by the invention is good in high temperature resistance, and can be baked at a high temperature of 90 ℃ for 30 minutes, so that the protective film is not wrinkled, does not bubble, does not separate, and is free from adhesive residue after being peeled.
3. The PE protective film can adjust different gluing amounts and stripping forces according to different surfaces of objects to be pasted, the adhesion force is controllable within the range of 200-500g/25mm, products with different surface treatments can be met, and the good pasting and tearing effects are achieved.
Detailed Description
Example 1
The first aspect of this embodiment provides a high temperature resistant PE protection film of easily cutting, the PE protection film includes substrate layer and pressure sensitive adhesive layer, and wherein the thickness ratio of substrate layer and pressure sensitive adhesive layer is 5:1.
the structure of the substrate layer comprises an outer layer, a middle layer and an inner layer, wherein the weight ratio of the preparation raw materials of the outer layer, the middle layer and the inner layer is 2:5:1.
the outer layer is prepared from the following raw materials in parts by weight: 70 parts of low-density polyethylene and 30 parts of polypropylene, wherein the melt index (230 ℃/2.16 kg) of the low-density polyethylene is 22g/10min, the low-density polyethylene is purchased from Exxon Mobil chemical industry and has the model of LD650, the flexural modulus of the polypropylene is 1180MPa, and the low-density polyethylene is purchased from Yingcang plastification Co., ltd, and has the model of M30RH.
The preparation raw materials of the middle layer comprise the following components in parts by weight: 25 parts of polyethylene, 50 parts of linear low-density polyethylene and 25 parts of polypropylene, wherein the polyethylene is low-density polyethylene, is purchased from Hongzui technology Limited in Dongguan city, and has the model of 868-000, the polypropylene is purchased from Jinzhen plasticizing technology Limited in Shenzhen city, and has the model of BC03B, the melt index (230 ℃/2.16 kg) of the linear low-density polyethylene is 5g/10min, and is purchased from Exxon Meifu chemical industry, and has the model of LL8446.21.
The inner layer comprises the following raw materials in parts by weight: 65 parts of low-density polyethylene and 40 parts of polypropylene, wherein the melt index (230 ℃/2.16 kg) of the low-density polyethylene is 70g/10min, the low-density polyethylene is purchased from Exxon Mobil chemical engineering and has the model of LD654, the melt index (230 ℃/2.16 kg) of the polypropylene is 36g/10min, and the low-density polyethylene is purchased from Exxon Mobil chemical engineering and has the model of PP3155E3.
The preparation method of the substrate layer comprises the following steps: the preparation raw materials of the outer layer, the middle layer and the inner layer are respectively put into a three-layer co-agent film blowing machine with a dust removal system, and are subjected to three-layer melting co-extrusion, stainless steel filter screen blowing and filtering and blowing to prepare the substrate layer.
The preparation raw materials of the pressure-sensitive adhesive layer comprise the following components in parts by weight: 20 parts of acrylic ester, 20 parts of polyimide, 6 parts of ethyl acetate, 4 parts of a melting aid and 1 part of isophorone diisocyanate.
The polyimide has a viscosity (30 ℃) of 8000-20000mPa.s, is purchased from New Material Ltd of Ann, changzhou and has a model of PAA-1.
The fluxing agent is an alkyl phenolic resin, the hydroxymethyl content of the alkyl phenolic resin is 12-16%, and the alkyl phenolic resin is purchased from Kyowa Kayu synthetic materials science and technology Co., ltd, and the model is FRJ-551.
The preparation method of the pressure-sensitive adhesive layer comprises the steps of uniformly mixing acrylic ester, polyimide, ethyl acetate, a fluxing agent and isophorone diisocyanate, coating the mixture on the surface of a base material layer by a gravure coating method, and drying and curing.
In a second aspect of the present invention, there is provided a method for preparing a high temperature resistant PE protective film easy to cut, including the following steps: (1) Respectively putting the preparation raw materials of the outer layer, the middle layer and the inner layer into a three-layer co-agent film blowing machine with a dust removal system, and preparing a substrate layer through three-layer melt co-extrusion, stainless steel filter screen blowing and blowing; (2) And coating the pressure-sensitive adhesive layer on the surface of the substrate layer by a gravure coating method, drying, curing and rolling to obtain the pressure-sensitive adhesive.
Comparative example 1
The first aspect of the present comparative example provides an easy-to-cut high temperature PE protective film, and the specific implementation manner is the same as example 1, except that the outer layer is prepared from the following raw materials in parts by weight: 70 parts of low-density polyethylene, 30 parts of polypropylene and the low-density polyethylene, wherein the melt index (230 ℃/2.16 kg) of the low-density polyethylene is 70g/10min, the polypropylene is purchased from Exxon Mobil chemical engineering and is of the type LD654, the melt index (230 ℃/2.16 kg) of the polypropylene is 36g/10min, and the polypropylene is purchased from Exxon Mobil chemical engineering and is of the type PP3155E3.
The inner layer comprises the following raw materials in parts by weight: 65 parts of low-density polyethylene and 40 parts of polypropylene, wherein the melt index (230 ℃/2.16 kg) of the low-density polyethylene is 22g/10min, the low-density polyethylene is purchased from Exxon Mobil chemical industry and has the model LD650, the flexural modulus of the polypropylene is 1180MPa, and the low-density polyethylene is purchased from Yingcang plasticizing company of Yuyao and has the model M30RH.
In a second aspect of the present comparative example, a method for preparing a high temperature resistant PE protective film that is easy to cut is provided, and the specific embodiment is the same as example 1.
Comparative example 2
The first aspect of the present comparative example provides an easily cut high temperature PE protective film, and the specific embodiment is the same as example 1, except that the middle layer is prepared from the following raw materials in parts by weight: 25 parts of polyethylene and 25 parts of polypropylene, wherein the polyethylene is low-density polyethylene, and is purchased from Hongzui plastication technology Limited in Dongguan city with the model number of 868-000, and the polypropylene is purchased from Jinzhen gold plasticization technology Limited in Shenzhen city with the model number of BC03B.
In a second aspect, the present comparative example provides a method for preparing a high temperature resistant PE protective film that is easy to cut, the embodiment is the same as example 1.
Comparative example 3
This comparative example provides in a first aspect an easily cuttable high temperature PE protective film, as described in example 1, except that the polyimide has a viscosity (30 ℃) of 400 to 1000mpa.s, model PAA-4005, available from asian new materials, inc.
In a second aspect, the present comparative example provides a method for preparing a high temperature resistant PE protective film that is easy to cut, the embodiment is the same as example 1.
Performance testing
The high-temperature resistance test method comprises the following steps: the PE protective films with the same size in the examples and the comparative examples are respectively attached to the surfaces of PVC plates with the same size and cleanliness, the PVC plates are continuously baked for 30min in a baking oven at 90 ℃, and the PE protective films are taken out to observe whether wrinkling, bubbling and warping phenomena exist.
The 180-degree peel strength is the peel strength between the PE protective film and the PVC base material, and the test standard is GB/T2792-2014.
| High temperature resistance | 180 degree peel strength (N/25 mm) | |
| Example 1 | Without change | 28 |
| Comparative example 1 | Wrinkling, blistering, warping | 12 |
| Comparative example 2 | Wrinkling, blistering, warping | 19 |
| Comparative example 3 | Wrinkling, blistering, warping | 13 |
Claims (10)
1. The high-temperature-resistant PE protective film easy to cut is characterized by comprising a base material layer and a pressure-sensitive adhesive layer, wherein the thickness ratio of the base material layer to the pressure-sensitive adhesive layer is (3-8): 1.
2. the easy-to-cut high temperature resistant PE protective film according to claim 1, wherein the structure of the substrate layer comprises an outer layer, a middle layer and an inner layer, and the outer layer, the middle layer and the inner layer are made of polyethylene and polypropylene.
3. The easy-to-cut high temperature resistant PE protective film according to claim 2, wherein the melt index of the polyethylene in the outer layer is 20-30g/10min.
4. An easily cut high temperature resistant PE protective film according to any one of claims 2 to 3, wherein the flexural modulus of the polypropylene in the outer layer is 1000-1200MPa.
5. The easy-to-cut high temperature resistant PE protective film according to any one of claims 2 to 4, wherein the melt index of the polyethylene in the inner layer is 50-100g/10min.
6. The easy-to-cut high temperature resistant PE protective film according to any one of claims 2-5, wherein the middle layer is made of a linear low density polyethylene having a melt index of 2-20g/10min.
7. The easy-to-cut high temperature resistant PE protective film according to any one of claims 2 to 6, wherein the outer layer is prepared from the following raw materials in parts by weight: 60-80 parts of polyethylene and 20-40 parts of polypropylene.
8. The easy-to-cut high temperature resistant PE protective film according to any one of claims 2-7, wherein the middle layer is prepared from raw materials including, by weight: 20-30 parts of polyethylene, 40-60 parts of linear low-density polyethylene and 20-30 parts of polypropylene.
9. The easy-to-cut high temperature resistant PE protective film according to any one of claims 2 to 8, wherein the inner layer is prepared from the following raw materials in parts by weight: 60-80 parts of polyethylene and 20-40 parts of polypropylene.
10. A method for preparing an easily-cut high-temperature resistant PE protective film according to any one of claims 2-9, comprising the steps of: (1) Respectively putting the preparation raw materials of the outer layer, the middle layer and the inner layer into a three-layer co-agent film blowing machine with a dust removal system, and preparing a substrate layer through three-layer melt co-extrusion, stainless steel filter screen blowing and blowing; (2) And coating the pressure-sensitive adhesive layer on the surface of the substrate layer by a gravure coating method, drying, curing and rolling to obtain the pressure-sensitive adhesive.
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| CN111334206A (en) * | 2020-04-28 | 2020-06-26 | 广东硕成科技有限公司 | High-temperature-resistant protective film and preparation method thereof |
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| CN107815257A (en) * | 2017-11-08 | 2018-03-20 | 苏州赛伍应用技术股份有限公司 | A kind of chip cutting diaphragm and preparation method thereof and application method |
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