CN114231204B - High-toughness wear-resistant composite PE protective film and preparation method thereof - Google Patents
High-toughness wear-resistant composite PE protective film and preparation method thereof Download PDFInfo
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- CN114231204B CN114231204B CN202111611755.1A CN202111611755A CN114231204B CN 114231204 B CN114231204 B CN 114231204B CN 202111611755 A CN202111611755 A CN 202111611755A CN 114231204 B CN114231204 B CN 114231204B
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- 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
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- C09J183/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Adhesives based on derivatives of such polymers
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- C08J2423/26—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers modified by chemical after-treatment
- C08J2423/28—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers modified by chemical after-treatment by reaction with halogens or halogen-containing compounds
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- C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
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- C08J2453/00—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2453/02—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers of vinyl aromatic monomers and conjugated dienes
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- C08K3/24—Acids; Salts thereof
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- 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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- 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
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- C09J2423/00—Presence of polyolefin
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Abstract
The invention discloses a high-toughness wear-resistant composite PE protective film, which comprises an original film protective film layer, wherein the thickness of the original film protective film layer is 16-75 mu m, the original film protective film layer mainly plays a role in protection, the original film protective film layer is made of PET (thermoplastic polyester), the thickness of the pressure-sensitive adhesive layer is 1-20 mu m, the thickness of the scratch-resistant layer is 2-15 mu m, and the scratch-resistant layer is a wear-resistant polyurethane hardening coating. In the invention, the chlorinated polyethylene is white powder, is nontoxic and odorless, has excellent weather resistance, corrosion resistance, aging resistance and excellent toughness, has better processing performance, and the methyl methacrylate-butadiene-styrene is an important toughening modifier for PE, can keep the transparency of PE to the maximum extent, has better interface compatibility, and has better interface compatibility through reasonable arrangement of a multilayer structure, and the arrangement of the scratch-resistant layer and the silica gel protective film layer further enhances the toughness, so that the stretchability of the PE protective film is increased, the flexibility is enhanced, and the surface wear resistance of the PE protective film is also improved.
Description
Technical Field
The invention belongs to the technical field of PE protective films, and particularly relates to a high-toughness wear-resistant composite PE protective film and a preparation method thereof.
Background
The PE protective film is a macromolecular organic compound with the simplest structure and is the most widely used macromolecular material in the world today, and the PE protective film takes a special Polyethylene (PE) plastic film as a base material and is divided into a high-density polyethylene protective film, a medium-density polyethylene and a low-density polyethylene according to different densities.
The PE protective film has the greatest advantages that the protected product is not polluted, corroded and scratched in the production, processing, transportation, storage and use processes, and the original bright and clean surface is protected, so that the quality and market competitiveness of the product are improved.
The conventional protective film has the following drawbacks:
because the PE protection film is formed by three PE film layers through fusion, coextrusion and blowing, the PE film layers and the adhesive layer can be gradually separated in the long-time use process, and the PE film layers can be easily separated.
The conventional PE protective film is not only poor in toughness as described above, but also poor in surface resistance, and is easily worn out when subjected to external force.
Disclosure of Invention
The invention aims to provide a high-toughness wear-resistant composite PE protective film and a preparation method thereof, so as to solve the problem that the PE protective film is formed by melting, co-extruding and blowing three PE film layers, and the PE film layers are gradually separated from an adhesive layer and are easy to fall off in the long-time use process.
The conventional PE protective film has poor toughness and poor surface resistance, and is easily worn when subjected to external force.
The technical scheme for solving the technical problems is as follows: the high-toughness wear-resistant composite PE protective film comprises an original film protective film layer, wherein the thickness of the original film protective film layer is 16-75 mu m, and the original film protective film layer mainly plays a role in protection and is made of PET (thermoplastic polyester);
a pressure-sensitive adhesive layer having a thickness of 1 to 20 μm;
the thickness of the scratch-resistant layer is 2-15 mu m, the scratch-resistant layer is a wear-resistant polyurethane hardening coating, and the hardness is as high as 4H;
the thickness of the silica gel protective film layer is 23-100 mu m, so that the protective effect of the silica gel protective film layer is enhanced;
the thickness of the PE film layer is 6-30 mu m;
an adhesive layer having a thickness of 2 to 20 μm;
the PE film layer comprises an outer layer, an intermediate layer and an inner layer;
an outer layer of 2-10 mu m;
an intermediate layer of 2-10 μm;
an inner layer of 2-10 mu m.
The preparation method of the high-toughness wear-resistant composite PE protective film comprises the steps of adopting extrusion equipment to produce, wherein conveying equipment is arranged on the right side of the extrusion equipment, winding rollers are movably arranged on two sides of the inside of the conveying equipment, a semi-finished product layer is extruded on the right side of the extrusion equipment, a bottom block is fixedly arranged at the center of the top of the conveying equipment, a mounting frame placed on the ground is fixedly arranged on the rear side of the conveying equipment, a pushing cylinder is fixedly arranged at the top of the mounting frame, the output end of the pushing cylinder penetrates through the inner side of the mounting frame and is fixedly provided with a pushing rod, one side of the pushing rod is fixedly connected with a limiting sliding block, adjusting blocks are movably arranged on the surfaces of the pushing rod and the limiting sliding block, one side of each adjusting block is provided with locking bolts in a penetrating mode, threaded holes which are longitudinally distributed are formed in one side of the pushing rod, and the locking bolts are in threaded connection with the pushing rod through threaded holes, and the pushing rod is fixedly arranged at the bottom of each adjusting block.
Preferably, one winding roller is used for winding, one winding roller is used for unreeling, the adhesive layer is wound on the two winding rollers, and the semi-finished product layer is adhered to the adhesive layer.
Preferably, the semi-finished product layer is composed of a PE film layer, an original film protection film layer, a pressure-sensitive adhesive layer, a scratch-resistant layer and a silica gel protection film layer.
Preferably, the semi-finished product layer and the adhesive layer are positioned between the extrusion block and the bottom block, and the semi-finished product layer and the adhesive layer are bonded together through extrusion of the bottom block and the extrusion block.
Preferably, guide rollers are embedded on two sides of the extrusion block, and the semi-finished product layer is matched with the guide rollers.
Preferably, a guide roller is movably arranged at one end of the inner side of the mounting frame, and the semi-finished product layer passes over the guide roller.
Preferably, the top of the adjusting block is provided with a sliding hole matched with the pushing rod and the limiting sliding block.
Preferably, an opening matched with the locking bolt is formed in one side of the adjusting block, and the opening is communicated with the sliding hole.
A preparation method of a high-toughness wear-resistant composite PE protective film comprises the following steps:
the PE film layer is formed by co-extrusion bonding of an outer layer, an intermediate layer and an inner layer, and the inner layer comprises the following components in parts by weight:
38-40 parts of HDPE, 9-15 parts of LLDPE, 12-20 parts of SEBS, 7-10 parts of toughening filler, 3-5 parts of sodium carboxymethyl cellulose, 2-5 parts of tea saponin, 5-3 parts of heat stabilizer, 1-2 parts of antioxidant and 1-3 parts of peroxide cross-linking agent, wherein the toughening filler is one of chlorinated polyethylene, methyl methacrylate-butadiene-styrene or light calcium carbonate, the viscosity of the sodium carboxymethyl cellulose is 900-1200 mpa.s, and the heat stabilizer is dibutyl tin dilaurate and methyl amyl alcohol, and the weight ratio of the dibutyl tin dilaurate to the methyl amyl alcohol is 1:1 or dibutyl tin maleate and methyl amyl alcohol in the weight ratio of 1:1, the acrylic ester is selected from one or the combination of ethyl acrylate and hydroxyethyl methacrylate;
1. the outer layer, the middle layer and the inner layer are fused and co-extruded by an extruder to form a PE film layer;
2. the PE film layer, the original film protective film layer, the pressure-sensitive adhesive layer, the scratch-resistant layer and the silica gel protective film layer are melted and co-extruded by an extruder to form a semi-finished product layer;
3. bonding one side of the adhesive layer with adhesiveness to the semi-finished product layer;
the adhesive layer comprises the following components in parts by weight: 20-35 parts of acrylic acid, 40-60 parts of acrylic ester, 15-15 parts of methyl vinyl silicone rubber, 9-15 parts of thickening filler, 1-6 parts of tea saponin-acrylic ester-based wetting agent, 1-5 parts of silane coupling agent and 1-7 parts of cross-linking agent;
the preparation method of the tea saponin-acrylic ester-based wetting agent comprises the following steps: s1, adding 10-20 parts of acrylic acid, 15-25 parts of methyl acrylate, 12-15 parts of double bond-containing organosilicon, 30-55 parts of water and 0.3-2 parts of carboxylic acid type compatilizer into a three-neck flask, stirring at a stirring speed of 150-140r/min, introducing nitrogen flow, heating to 55 ℃ in a nitrogen environment, and preserving heat for 20min;
s2, adding 1-3 parts of polyoxyethylene hydrogenated castor oil and 1-2 parts of sodium dodecyl sulfate into the step S1, uniformly stirring, and heating to 75 ℃;
s3, adding 0.1-0.5 part of peroxide initiator into the step S2, keeping stirring, and reacting for 1.5-3 hours;
s4, adding 15-40 parts of tea saponin, and soaking for 2 hours;
the preparation method of the inner layer comprises the following steps: s1, adding 30-40 parts of HDPE, 8-15 parts of LLDPE, 12-20 parts of SEBS and 3-9 parts of tea saponin into an extruder, uniformly mixing, adjusting the temperature to 120-150 ℃, extruding and granulating to obtain a composite matrix;
s2, putting the composite matrix into an extruder again, raising the temperature to 145-160 ℃, and adding 5-12 parts of toughening filler, 2-5 parts of sodium carboxymethyl cellulose, 1-5 parts of heat stabilizer and 1-6 parts of antioxidant;
s3, adding 1-5 parts of cross-linking agent, and carrying out melt extrusion to form a film;
the preparation method of the adhesive layer comprises the following steps: s1, adding 20-35 parts of acrylic acid, 30-60 parts of acrylic esters, 11-15 parts of methyl vinyl silicone rubber, 1-3 parts of silane coupling agent and 2-5 parts of tea saponin-acrylic ester wetting agent into a reaction container, mixing and stirring, and raising the temperature to 40-65 ℃;
s2, adding 3-10 parts of thickening filler into the step S1, raising the temperature to 85-110 ℃, and stirring for 2-4 hours;
s3, adding 1-3 parts of cross-linking agent, and stirring for 1-2 hours to form an adhesive;
s4, spraying the adhesive on the release substrate.
1. The beneficial effects of the invention are as follows: in the invention, the chlorinated polyethylene is white powder, is nontoxic and odorless, has excellent weather resistance, corrosion resistance, aging resistance and excellent toughness, has good compatibility with other high polymer materials, has good processing performance, and can keep the transparency of PE to the maximum extent, has good interface compatibility, has excellent toughening effect by three substances, and further enhances the toughness by reasonably arranging the scratch-resistant layer and the silica gel protective film layer, so that the extensibility is increased, the flexibility is enhanced, and the surface wear resistance of the PE protective film is also improved.
Drawings
The foregoing and/or other advantages of the present invention will become more apparent and more readily appreciated from the detailed description taken in conjunction with the following drawings, which are meant to be illustrative only and not limiting of the invention, wherein:
FIG. 1 is a schematic diagram of one embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a semi-finished layer according to one embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a PE film according to an embodiment of the invention.
In the drawings, the list of components represented by the various numbers is as follows:
1. the raw film protective film layer, 2, the pressure-sensitive adhesive layer, 3, the scratch-resistant layer, 4, the silica gel protective film layer, 5, the PE film layer, 6, the adhesive layer, 7, extrusion equipment, 8, conveying equipment, 9, a rolling roller, 10, a bottom block, 11, a mounting rack, 12, a pushing cylinder, 13, a pushing rod, 14, a limit sliding block, 15, a regulating block, 16, a locking bolt, 17, a threaded hole, 18, a guide roller, 19, an extrusion block, 20, a semi-finished product layer, 51, an outer layer, 52, an intermediate layer, 53 and an inner layer.
Detailed Description
Hereinafter, embodiments of the high-toughness wear-resistant composite PE protective film and the method of manufacturing the same of the present invention will be described with reference to the accompanying drawings.
The examples described herein are specific embodiments of the present invention, which are intended to illustrate the inventive concept, are intended to be illustrative and exemplary, and should not be construed as limiting the invention to the embodiments and scope of the invention. In addition to the embodiments described herein, those skilled in the art can adopt other obvious solutions based on the disclosure of the claims and specification of the present application, including those adopting any obvious substitutions and modifications to the embodiments described herein.
The drawings in the present specification are schematic views, which assist in explaining the concept of the present invention, and schematically show the shapes of the respective parts and their interrelationships. Note that, in order to clearly show the structures of the components of the embodiments of the present invention, the drawings are not drawn to the same scale. Like reference numerals are used to denote like parts.
FIGS. 1-3 show a high-toughness wear-resistant composite PE protective film according to an embodiment of the invention, which comprises a primary film protective film layer 1, the thickness of which is 16-75 μm, and the material of which is PET (thermoplastic polyester);
a pressure-sensitive adhesive layer 2 having a thickness of 12 μm;
the thickness of the scratch-resistant layer 3 is 2 mu m, the scratch-resistant layer 3 is a wear-resistant polyurethane hardening coating, and the hardness is as high as 4H;
the thickness of the silica gel protective film layer 4 is 23 mu m, so that the protective effect of the silica gel protective film layer is enhanced;
a PE film layer 5 having a thickness of 6 μm;
an adhesive layer 6 having a thickness of 2 μm;
the PE film layer 5 comprises an outer layer 51, an intermediate layer 52 and an inner layer 53;
an outer layer 51,2 μm;
intermediate layer 52,2 μm;
the inner layer 53,2 μm.
The preparation method of the high-toughness wear-resistant composite PE protective film adopts extrusion equipment 7 for production, conveying equipment 8 is arranged on the right side of the extrusion equipment 7, winding rollers 9 are movably arranged on two sides of the inside of the conveying equipment 8, a semi-finished product layer 20 is extruded on the right side of the extrusion equipment 7, a bottom block 10 is fixedly arranged at the center of the top of the conveying equipment 8, a mounting frame 11 placed on the ground is fixedly arranged on the rear side of the conveying equipment 8, a pushing cylinder 12 is fixedly arranged at the top of the mounting frame 11, the output end of the pushing cylinder 12 penetrates through the inner side of the mounting frame 11 and is fixedly provided with a pushing rod 13, one side of the pushing rod 13 is fixedly connected with a limiting slide block 14, adjusting blocks 15 are movably arranged on the surfaces of the pushing rod 13 and the limiting slide block 14, locking bolts 16 are arranged on one side of the adjusting blocks 15 in a penetrating way, threaded holes 17 which are longitudinally distributed are formed on one side of the pushing rod 13, the locking bolt 16 is in threaded connection with the pushing rod 13 through a threaded hole 17, an extrusion block 19 is fixedly arranged at the bottom of the regulating block 15, a rolling roller 9 is used for rolling, a rolling roller 9 is used for unreeling, an adhesive layer 6 is wound on the two rolling rollers 9, a semi-finished product layer 20 is adhered to the adhesive layer 6, the semi-finished product layer 20 consists of a PE film layer 5, a raw film protective film layer 1, a pressure-sensitive adhesive layer 2, a scratch-resistant layer 3 and a silica gel protective film layer 4, the semi-finished product layer 20 and the adhesive layer 6 are positioned between the extrusion block 19 and the bottom block 10, the semi-finished product layer 20 and the adhesive layer 6 are extruded and bonded together through the bottom block 10 and the extrusion block 19, guide rollers are embedded on two sides of the extrusion block 19, the semi-finished product layer 20 is matched with the guide rollers, one end of the inner side of the mounting frame 11 is movably provided with the guide roller 18, the semi-finished product layer 20 passes through the upper part of the guide roller 18, the sliding hole matched with the pushing rod 13 and the limiting slide block 14 is formed in the top of the adjusting block 15, a hole matched with the locking bolt 16 is formed in one side of the adjusting block 15, and the hole is communicated with the sliding hole.
Embodiment one:
a preparation method of a high-toughness wear-resistant composite PE protective film comprises the following steps:
the PE film layer 5 is formed by coextruding and bonding an outer layer 51, an intermediate layer 52 and an inner layer 53, wherein the inner layer 53 comprises the following components in parts by weight:
38 parts of HDPE, 9 parts of LLDPE, 12 parts of SEBS, 7 parts of toughening filler, 3 parts of sodium carboxymethylcellulose, 2 parts of tea saponin, 5 parts of heat stabilizer, 1 part of antioxidant and 1 part of peroxide cross-linking agent, wherein the toughening filler is one of chlorinated polyethylene, methyl methacrylate-butadiene-styrene or light calcium carbonate, the viscosity of the sodium carboxymethylcellulose is 900 mpa.s, the heat stabilizer is dibutyl tin dilaurate and methyl amyl alcohol, and the weight ratio of the dibutyl tin dilaurate to the methyl amyl alcohol is 1:1 or dibutyl tin maleate and methyl amyl alcohol in the weight ratio of 1:1, the acrylic ester is selected from one or the combination of ethyl acrylate and hydroxyethyl methacrylate;
1. the outer layer 51, the middle layer 52 and the inner layer 53 are fused and co-extruded by an extruder to form a PE film layer 5;
2. the PE film layer 5, the original film protective film layer 1, the pressure-sensitive adhesive layer 2, the scratch-resistant layer 3 and the silica gel protective film layer 4 are melted and co-extruded by an extruder to form a semi-finished product layer 20;
3. bonding the adhesive layer 6 on the tacky side to the semi-finished layer 20;
the adhesive layer 6 comprises the following components in parts by weight: 20 parts of acrylic acid, 40 parts of acrylic esters, 15 parts of methyl vinyl silicone rubber, 9 parts of thickening filler, 1 part of tea saponin-acrylic ester-based wetting agent, 1 part of silane coupling agent and 1 part of cross-linking agent;
the preparation method of the tea saponin-acrylic ester-based wetting agent comprises the following steps: s1, adding 10 parts of acrylic acid, 15 parts of methyl acrylate, 12 parts of double bond-containing organosilicon, 30 parts of water and 0.3 part of carboxylic acid type compatilizer into a three-neck flask, stirring at a stirring speed of 150r/min, introducing nitrogen flow, heating to 55 ℃ in a nitrogen environment, and preserving heat for 20min;
s2, adding 1 part of polyoxyethylene hydrogenated castor oil and 1 part of sodium dodecyl sulfate into the step S1, uniformly stirring, and heating to 75 ℃;
s3, adding 0.1 part of peroxide initiator into the step S2, and keeping stirring for reacting for 1.5 hours;
s4, adding 15 parts of tea saponin, and soaking for 2 hours;
the preparation method of the inner layer 53 comprises the following steps: s1, adding 30 parts of HDPE, 8 parts of LLDPE, 12 parts of SEBS and 3 parts of tea saponin into an extruder, uniformly mixing, adjusting the temperature to 120 ℃, extruding and granulating to obtain a composite matrix;
s2, putting the composite matrix into an extruder again, raising the temperature to 145 ℃, and adding 5 parts of toughening filler, 2 parts of sodium carboxymethyl cellulose, 1 part of heat stabilizer and 1 part of antioxidant;
s3, adding 1 part of cross-linking agent, and carrying out melt extrusion to form a film;
the preparation method of the adhesive layer 6 comprises the following steps: s1, adding 20 parts of acrylic acid, 30 parts of acrylic esters, 11 parts of methyl vinyl silicone rubber, 1 part of silane coupling agent and 2 parts of tea saponin-acrylic ester-based wetting agent into a reaction container, mixing and stirring, and increasing the temperature to 40 ℃;
s2, adding 3 parts of thickening filler into the step S1, raising the temperature to 85 ℃, and stirring for 2 hours;
s3, adding 1 part of cross-linking agent, and stirring for 1h to form an adhesive;
s4, spraying the adhesive on the release substrate.
Embodiment two:
a preparation method of a high-toughness wear-resistant composite PE protective film comprises the following steps:
the PE film layer 5 is formed by coextruding and bonding an outer layer 51, an intermediate layer 52 and an inner layer 53, wherein the inner layer 53 comprises the following components in parts by weight:
40 parts of HDPE, 15 parts of LLDPE, 20 parts of SEBS, 10 parts of toughening filler, 5 parts of sodium carboxymethylcellulose, 5 parts of tea saponin, 3 parts of heat stabilizer, 2 parts of antioxidant and 3 parts of peroxide cross-linking agent, wherein the toughening filler is one of chlorinated polyethylene, methyl methacrylate-butadiene-styrene or light calcium carbonate, the viscosity of the sodium carboxymethylcellulose is 1200 mpa.s, the heat stabilizer is dibutyl tin dilaurate and methyl amyl alcohol, and the weight ratio of the dibutyl tin dilaurate to the methyl amyl alcohol is 1:1 or dibutyl tin maleate and methyl amyl alcohol in the weight ratio of 1:1, the acrylic ester is selected from one or the combination of ethyl acrylate and hydroxyethyl methacrylate;
1. the outer layer 51, the middle layer 52 and the inner layer 53 are fused and co-extruded by an extruder to form a PE film layer 5;
2. the PE film layer 5, the original film protective film layer 1, the pressure-sensitive adhesive layer 2, the scratch-resistant layer 3 and the silica gel protective film layer 4 are melted and co-extruded by an extruder to form a semi-finished product layer 20;
3. bonding the adhesive layer 6 on the tacky side to the semi-finished layer 20;
the adhesive layer 6 comprises the following components in parts by weight: 35 parts of acrylic acid, 60 parts of acrylic esters, 15 parts of methyl vinyl silicone rubber, 15 parts of thickening filler, 6 parts of tea saponin-acrylic ester-based wetting agent, 15 parts of silane coupling agent and 7 parts of cross-linking agent;
the preparation method of the tea saponin-acrylic ester-based wetting agent comprises the following steps: s1, adding 20 parts of acrylic acid, 25 parts of methyl acrylate, 15 parts of double bond-containing organosilicon, 55 parts of water and 2 parts of carboxylic acid type compatilizer into a three-neck flask, stirring at a stirring speed of 140r/min, introducing nitrogen flow, heating to 55 ℃ in a nitrogen environment, and preserving heat for 20min;
s2, adding 3 parts of polyoxyethylene hydrogenated castor oil and 2 parts of sodium dodecyl sulfate into the step S1, uniformly stirring, and heating to 75 ℃;
s3, adding 0.5 part of peroxide initiator into the step S2, keeping stirring, and reacting for 3 hours;
s4, adding 40 parts of tea saponin, and soaking for 2 hours;
the preparation method of the inner layer 53 comprises the following steps: s1, adding 40 parts of HDPE, 15 parts of LLDPE, 20 parts of SEBS and 9 parts of tea saponin into an extruder, uniformly mixing, adjusting the temperature to 150 ℃, extruding and granulating to obtain a composite matrix;
s2, putting the composite matrix into an extruder again, raising the temperature to 160 ℃, and adding 12 parts of toughening filler, 5 parts of sodium carboxymethyl cellulose, 5 parts of heat stabilizer and 6 parts of antioxidant;
s3, adding 5 parts of cross-linking agent, and carrying out melt extrusion to form a film;
the preparation method of the adhesive layer 6 comprises the following steps: s1, adding 35 parts of acrylic acid, 60 parts of acrylic esters, 15 parts of methyl vinyl silicone rubber, 3 parts of silane coupling agent and 5 parts of tea saponin-acrylic ester-based wetting agent into a reaction container, mixing and stirring, and increasing the temperature to 65 ℃;
s2, adding 10 parts of thickening filler into the step S1, raising the temperature to 110 ℃, and stirring for 4 hours;
s3, adding 3 parts of a cross-linking agent, and stirring for 2 hours to form an adhesive;
s4, spraying the adhesive on the release substrate.
Working principle: in actual use, the semi-finished product layer 20 is extruded through the extrusion equipment 7, then a worker guides the semi-finished product layer to pass through the guide roller 18 and then is primarily bonded with the adhesive layer 6 wound on the two winding drums 9, then the pushing cylinder 12 is started to push the pushing rod 13 to move downwards, the pushing rod 13 drives the adjusting block 15 and the extruding block 19 to move downwards, then the semi-finished product layer 20 and the adhesive layer 6 are extruded and bonded together under the cooperation of the extruding block 19 and the bottom block 10 to finish the final production of the composite PE protective film, wherein in order to meet the production of PE protective films with different thicknesses, the worker can unscrew the locking bolt 16, then slide the adjusting block 15 on the pushing rod 13 and the limiting slide block 14 to adjust the height of the extruding block 19, and because the pushing forming distance of the pushing rod 13 is fixed, the adjusting distance between the bottom block 10 and the extruding block 19 can meet the production of PE protective films with different thicknesses.
The above disclosed features are not limited to the disclosed combinations with other features, and other combinations between features can be made by those skilled in the art according to the purpose of the invention to achieve the purpose of the invention.
Claims (9)
1. The preparation method of the high-toughness wear-resistant composite PE protective film is characterized in that the preparation method adopts extrusion equipment (7) for production, conveying equipment (8) is arranged on the right side of the extrusion equipment (7), a rolling roller (9) is movably arranged on two sides of the inside of the conveying equipment (8), a semi-finished product layer (20) is extruded on the right side of the extrusion equipment (7), a bottom block (10) is fixedly arranged at the center of the top of the conveying equipment (8), a mounting frame (11) placed on the ground is fixedly arranged on the rear side of the conveying equipment (8), a pushing cylinder (12) is fixedly arranged at the top of the mounting frame (11), a pushing rod (13) is fixedly arranged at the output end of the pushing cylinder (12) penetrating through the inner side of the mounting frame (11), one side of the pushing rod (13) is fixedly connected with a limit sliding block (14), an adjusting block (15) is movably arranged on the surface of the pushing rod (13) and the limit sliding block (14), one side of the adjusting block (15) is penetrated with a locking bolt (16), one side of the pushing rod (13) is longitudinally provided with a threaded hole (17) through which is connected with the threaded hole (17), the bottom of the adjusting block (15) is fixedly provided with a squeezing block (19).
2. The preparation method of the high-toughness wear-resistant composite PE protective film according to claim 1, wherein one winding roller (9) is used for winding, one winding roller (9) is used for unreeling, the adhesive layer (6) is wound on the two winding rollers (9), and the semi-finished product layer (20) is adhered on the adhesive layer (6).
3. The method for preparing the high-toughness wear-resistant composite PE protective film according to claim 2, wherein the semi-finished product layer (20) is composed of a PE film layer (5), an original film protective film layer (1), a pressure-sensitive adhesive layer (2), a scratch-resistant layer (3) and a silica gel protective film layer (4).
4. A method for preparing a high-toughness wear-resistant composite PE protective film according to claim 3, characterized in that the semi-finished product layer (20) and the adhesive layer (6) are located between the extrusion block (19) and the bottom block (10), and the semi-finished product layer (20) and the adhesive layer (6) are extrusion-bonded together through the bottom block (10) and the extrusion block (19).
5. The method for preparing the high-toughness wear-resistant composite PE protective film according to claim 4, wherein guide rollers are embedded on two sides of the extrusion block (19), and the semi-finished product layer (20) is matched with the guide rollers.
6. The method for preparing the high-toughness wear-resistant composite PE protective film according to claim 5, wherein a guide roller (18) is movably arranged at one end of the inner side of the mounting frame (11), and the semi-finished product layer (20) passes over the guide roller (18).
7. The preparation method of the high-toughness wear-resistant composite PE protective film according to claim 6, wherein the top of the adjusting block (15) is provided with a sliding hole matched with the pushing rod (13) and the limiting slide block (14).
8. The method for preparing the high-toughness wear-resistant composite PE protective film according to claim 7, wherein an opening matched with the locking bolt (16) is formed on one side of the adjusting block (15), and the opening is communicated with the sliding hole.
9. The preparation method of the high-toughness wear-resistant composite PE protective film according to claim 8, which is characterized by comprising the following steps:
the PE film layer (5) is formed by a film formed by co-extrusion bonding of an outer layer (51), an intermediate layer (52) and an inner layer (53), and the inner layer (53) comprises the following components in parts by weight:
38-40 parts of HDPE, 9-15 parts of LLDPE, 12-20 parts of SEBS, 7-10 parts of toughening filler, 3-5 parts of sodium carboxymethyl cellulose, 2-5 parts of tea saponin, 3-5 parts of heat stabilizer, 1-2 parts of antioxidant and 1-3 parts of peroxide cross-linking agent, wherein the toughening filler is one of chlorinated polyethylene, methyl methacrylate-butadiene-styrene or light calcium carbonate, the viscosity of the sodium carboxymethyl cellulose is 900-1200 mpa.s, and the heat stabilizer is dibutyl tin dilaurate and methyl amyl alcohol with the weight ratio of 1:1 or dibutyl tin maleate and methyl amyl alcohol in the weight ratio of 1:1, combining;
1. the outer layer (51), the middle layer (52) and the inner layer (53) are fused and co-extruded by an extruder to form a PE film layer (5);
2. the PE film layer (5), the original film protective film layer (1), the pressure-sensitive adhesive layer (2), the scratch-resistant layer (3) and the silica gel protective film layer (4) are melted and co-extruded by an extruder to form a semi-finished product layer (20);
3. bonding the adhesive layer (6) on the adhesive side of the semi-finished product layer (20);
the adhesive layer (6) comprises the following components in parts by weight: 20-35 parts of acrylic acid, 40-60 parts of acrylic ester, 11-15 parts of methyl vinyl silicone rubber, 9-15 parts of thickening filler, 1-6 parts of tea saponin-acrylic ester-based wetting agent, 1-5 parts of silane coupling agent and 1-7 parts of cross-linking agent;
the preparation method of the tea saponin-acrylic ester-based wetting agent comprises the following steps: s1, adding 10-20 parts of acrylic acid, 15-25 parts of methyl acrylate, 12-15 parts of double bond-containing organosilicon and
stirring 30-55 parts of water and 0.3-2 parts of carboxylic acid type compatilizer at a stirring speed of 150-140r/min, introducing nitrogen flow, heating to 55 ℃ in a nitrogen environment, and preserving heat for 20min;
s2, adding 1-3 parts of polyoxyethylene hydrogenated castor oil and 1-2 parts of sodium dodecyl sulfate into the step S1, uniformly stirring, and heating to 75 ℃;
s3, adding 0.1-0.5 part of peroxide initiator into the step S2, keeping stirring, and reacting for 1.5-3 hours;
s4, adding 15-40 parts of tea saponin, and soaking for 2 hours;
the preparation method of the inner layer (53) comprises the following steps: s1, adding 38-40 parts of HDPE, 9-15 parts of LLDPE, 12-20 parts of SEBS and 2-5 parts of tea saponin into an extruder, uniformly mixing, adjusting the temperature to 120-150 ℃, extruding and granulating to obtain a composite matrix;
s2, putting the composite matrix into an extruder again, raising the temperature to 145-160 ℃, and adding 7-10 parts of toughening filler, 3-5 parts of sodium carboxymethyl cellulose, 3-5 parts of heat stabilizer and 1-2 parts of antioxidant;
s3, adding 1-3 parts of peroxide crosslinking agent, and carrying out melt extrusion to form a film;
the preparation method of the adhesive layer (6) comprises the following steps: s1, adding 20-35 parts of acrylic acid, 40-60 parts of acrylic esters, 11-15 parts of methyl vinyl silicone rubber, 1-5 parts of silane coupling agent and 1-6 parts of tea saponin-acrylic ester wetting agent into a reaction container, mixing and stirring, and raising the temperature to 40-65 ℃;
s2, adding 9-15 parts of thickening filler into the step S1, raising the temperature to 85-110 ℃, and stirring for 2-4 hours;
s3, adding 1-7 parts of cross-linking agent, and stirring for 1-2 hours to form an adhesive;
s4, spraying the adhesive on the release substrate,
wherein, the acrylic ester is selected from one or the combination of ethyl acrylate and hydroxyethyl methacrylate.
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| CN202390358U (en) * | 2011-12-09 | 2012-08-22 | 斯迪克新型材料（江苏）有限公司 | Wear-resisting reimpression protective film |
| CN110028914B (en) * | 2019-05-10 | 2021-06-15 | 江阴市江泰高分子新材料有限公司 | High-adhesion PE protective film and preparation method thereof |
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