CN114085401A - Anti-scratch paint surface protective film with repairing function and preparation method thereof - Google Patents
Anti-scratch paint surface protective film with repairing function and preparation method thereof Download PDFInfo
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- CN114085401A CN114085401A CN202111618935.2A CN202111618935A CN114085401A CN 114085401 A CN114085401 A CN 114085401A CN 202111618935 A CN202111618935 A CN 202111618935A CN 114085401 A CN114085401 A CN 114085401A
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
- B05C11/1039—Recovery of excess liquid or other fluent material; Controlling means therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
- B05C9/04—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material to opposite sides of the work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H18/00—Winding webs
- B65H18/08—Web-winding mechanisms
- B65H18/10—Mechanisms in which power is applied to web-roll spindle
- B65H18/103—Reel-to-reel type web winding and unwinding mechanisms
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/06—Coating with compositions not containing macromolecular substances
- C08J7/065—Low-molecular-weight organic substances, e.g. absorption of additives in the surface of the article
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2463/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2477/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses a protective film with a repaired anti-scratch paint surface and a preparation method thereof, relates to the technical field of protective films, and is prepared from the following components in parts by mass: 4.8-5.6 parts of polyamide resin, 3.3-5.0 parts of transparent soft glue, 11.0-13.0 parts of TPU resin, 2.2-3.1 parts of ultraviolet screening agent, 4.5-4.8 parts of curing agent, 1.1-2.0 parts of epoxy resin, 0.9-1.6 parts of emulsifier, 2.3-6.0 parts of surface modifier and 5.1-7.8 parts of organic solvent, wherein the TPU resin, the curing agent and the epoxy resin are arranged and mixed with each other to carry out cross-linking reaction to form insoluble and infusible high polymer with a three-dimensional net structure, so that the paint surface protective film has excellent insulating property, strong adhesive force and chemical corrosion resistance, and the addition of the surface modifier can form a layer of organic coating on the surface of the paint surface protective film to further play a role in deformation recovery, thereby realizing the function of automatically repairing the paint surface protective film.
Description
Technical Field
The invention relates to the technical field of protective films, in particular to a protective film with a repaired scratch-resistant paint surface and a preparation method thereof.
Background
The existing paint surface protective film is a layer of transparent protective film adhered to paint on the surface of a product, is mainly used in industries such as automobile cosmetology in automobile aftermarket and the like, and can achieve the effect of protecting original factory paint of an automobile from being damaged by external force.
However, the existing paint protective film on the market cannot be self-repaired after being scratched by external factors, so that the appearance is attractive, a user needs to replace the protective film, and the protective film does not have the function of resisting ultraviolet rays, so that the protective film is easy to age and the service life is influenced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a paint protective film with repair scratch resistance and a preparation method thereof, and solves the problems that the existing paint protective film is weak in repair scratch resistance and does not have the function of resisting ultraviolet rays, so that the protective film is easy to age, and the service life is influenced.
In order to achieve the purpose, the invention is realized by the following technical scheme: a
In a first aspect, the present invention provides a protective film for repairing a scratch-resistant paint surface, comprising the following components: polyamide resin, transparent soft rubber, TPU resin, ultraviolet screening agent, curing agent, epoxy resin, emulsifier, surface modifier and organic solvent;
the protective film with the repaired scratch-resistant paint surface is prepared from the following components in parts by mass: 4.8-5.6 parts of polyamide resin, 3.3-5.0 parts of transparent soft rubber, 11.0-13.0 parts of TPU resin, 2.2-3.1 parts of ultraviolet screening agent, 4.5-4.8 parts of curing agent, 1.1-2.0 parts of epoxy resin, 0.9-1.6 parts of emulsifier, 2.3-6.0 parts of surface modifier and 5.1-7.8 parts of organic solvent.
As a preferable technical scheme of the invention, the protective film with the repaired scratch-resistant paint surface is prepared from the following components in parts by mass: 4.8 parts of polyamide resin, 3.3 parts of transparent soft rubber, 11.0 parts of TPU resin, 2.2 parts of ultraviolet screening agent, 4.5 parts of curing agent, 1.1 parts of epoxy resin, 0.9 part of emulsifier, 2.3 parts of surface modifier and 5.1 parts of organic solvent.
As a preferable technical scheme of the invention, the protective film with the repaired scratch-resistant paint surface is prepared from the following components in parts by mass: 5.0 parts of polyamide resin, 4.5 parts of transparent soft rubber, 12.0 parts of TPU resin, 2.8 parts of ultraviolet screening agent, 4.6 parts of curing agent, 1.6 parts of epoxy resin, 1.3 parts of emulsifier, 4.4 parts of surface modifier and 6.5 parts of organic solvent.
As a preferable technical scheme of the invention, the protective film with the repaired scratch-resistant paint surface is prepared from the following components in parts by mass: 5.6 parts of polyamide resin, 5.0 parts of transparent soft rubber, 13.0 parts of TPU resin, 3.1 parts of ultraviolet screening agent, 4.8 parts of curing agent, 2.0 parts of epoxy resin, 1.6 parts of emulsifier, 6.0 parts of surface modifier and 7.8 parts of organic solvent.
As a preferable technical scheme of the invention, the transparent soft rubber is one or more of PVC, polyamide elastomer, polyolefin elastomer and polyurethane elastomer, the curing agent is one or more of dimethylbenzylamine, aliphatic isocyanate and alicyclic isocyanate, the ultraviolet shielding agent is nano titanium dioxide, the surface modifier is one or more of silane coupling agent, titanate coupling agent, aluminate coupling agent and stearic acid, and the organic solvent is one or more of butanone, toluene, methyl isobutyl ketone, ethyl acetate, butyl acetate and propylene glycol methyl ether.
In a second aspect, the present invention also provides a preparation method, comprising the following steps: s1, weighing: weighing the components for preparing the repaired scratch-resistant paint surface protective film according to the proportion by using a weighing device, during weighing, placing polyamide resin, transparent soft rubber, an ultraviolet screening agent, a curing agent, an emulsifier and an organic solvent in a container A, placing TPU resin and epoxy resin in a container B, and finally placing a surface modifier in a container C;
s2, primary mixing: adding the components in the container A into a mixer, wherein the mixing time is 25-30min, and the rotating speed is 500-600r/min until the components are fully mixed and reacted;
s3, secondary mixing: adding the components in the container B into the mixture obtained in the step S2, and continuously stirring and mixing for 40-50min at the rotating speed of 500-600r/min to obtain the TPU raw material;
s4, stretch forming: feeding the TPU mixture obtained in the step S3 into film forming and stretching equipment, and stretching and forming the TPU mixture to obtain a primary paint surface protective film;
s5, coating: coating a layer of surface modifier on the surface of the primary paint surface protective film in the S4 by using coating equipment, wherein the dry coating amount is 10-20 mu m, so that the repaired scratch-resistant paint surface protective film can be obtained;
s6, drying and forming: sending the product obtained in the step S5 into drying equipment, wherein the drying temperature is 40-120 ℃, the drying time is 8-12 min, and stripping the product by using a film stripping machine;
s7, loading and warehousing: and cutting and winding the steel plate according to the requirements by using a trimming machine and a winding machine, and storing the steel plate in a warehouse.
In the above-mentioned step, the step of,
the coating equipment in the step S5 comprises a base, wherein a winding mechanism, a placing plate and an upper coating assembly are fixedly mounted at the top of the base, a modifier storing box is fixedly mounted at the upper end of the placing plate, a lower coating roller penetrates through the interior of the modifier storing box, and a collecting box is arranged at the upper end of the base and below the winding mechanism.
As a preferable technical scheme of the invention, the winding mechanism comprises a motor, a winding component and a winding and unwinding component which are identical in structure, and one end of each of the winding component and the winding and unwinding component is sleeved with a belt pulley group.
As a preferable technical scheme of the present invention, the winding assembly includes a first winding roller and a second winding roller, opposite ends of the first winding roller and the second winding roller are respectively sleeved with a first limiting ring and a second limiting ring, a hydraulic rod is fixedly installed inside the first winding roller, a telescopic end of the hydraulic rod forms a fixed connection structure with the second limiting ring through a cross-shaped connecting member, a plurality of sets of circumferentially distributed projections are fixedly installed inside the second winding roller and on one side of the cross-shaped connecting member, and grooves corresponding to the projections one to one and adapted to the projections are formed inside the first winding roller.
According to the preferable technical scheme, the upper coating assembly comprises a water pump, a modifier storage box and a supporting seat, a liquid inlet plate is fixedly installed on one side of the supporting seat, a sponge head is fixedly installed at the bottom of the liquid inlet plate, a cavity is formed in the liquid inlet plate, and a plurality of groups of liquid outlet holes are formed in one end of the bottom of the cavity at equal intervals.
As a preferable technical scheme of the invention, the liquid inlet plate is inclined, the water inlet end of the water pump forms a communicated fixed connection structure with the modifier storage box through the liquid outlet pipe, the water outlet end of the water pump forms a communicated fixed connection structure with the cavity through the liquid inlet pipe, and the power driving end of the motor is connected with the belt pulley group.
Advantageous effects
The invention provides a protective film with a repaired scratch-resistant paint surface and a preparation method thereof. Compared with the prior art, the method has the following beneficial effects:
1. the paint surface protective film has excellent insulating performance, strong adhesive force and chemical corrosion resistance, and a layer of organic coating can be formed on the surface of the paint surface protective film by adding the surface modifier, so that the paint surface protective film has the function of deformation recovery, thereby realizing the automatic repair of the paint surface protective film.
2. The transparent soft glue and the polyamide resin are added, so that the overall toughness can be improved, the wear resistance and the heat resistance can be improved, the impact resistance can be further improved, and the ultraviolet screening agent can play a role in resisting ultraviolet rays, so that the automobile finish paint is protected, and the finish paint is prevented from falling off.
3. The utility model provides a have and restore anti mar finish protection film and preparation method thereof, there is modifier case through the upper end fixed mounting who places the board, the coating roller has been run through to the inside of modifier case, the upper end of base has just been located winding mechanism's below and has been placed and has been collected the box, coating assembly on the top fixed mounting of base, so when using, not only can be to the upper surface and the lower surface of protection film, evenly coat the modifier simultaneously, but also can be at the roll-up in-process, in time collect excessive extruded modifier liquid, avoid scattering everywhere, be convenient for reuse once more, thereby the input cost has been reduced.
4. The utility model provides a have the inside fixed mounting who restores anti mar finish protection film and preparation method, through the hydraulic stem at first winding up roller, and the flexible end of hydraulic stem forms fixed connection structure through cross connecting piece and second spacing ring, the inside of second winding up roller and be located one side fixed mounting of cross connecting piece have a plurality of groups equidistance and be the lug that the circumference form distributes, the recess with lug one-to-one and looks adaptation is seted up to the inside of first winding up roller, so when using, through starting up the hydraulic stem, can prolong and shorten the interval between first winding up roller and the second winding up roller, not only realized adjusting the whole width of roll-up and roll-up, make its applicable multiple size protection film, but also solved the problem of changing the winding up roller many times and shifting the protection film many times, further improved coating efficiency and convenience of use.
Drawings
FIG. 1 is a schematic view showing the structure of a coating apparatus in the manufacturing method of the present invention;
FIG. 2 is a left side view showing the structure of a coating apparatus in the manufacturing method of the present invention;
FIG. 3 is a schematic view of a winding mechanism in the manufacturing method of the present invention;
FIG. 4 is a top view of the furling assembly in the manufacturing method of the present invention;
FIG. 5 is a cross-sectional view A-A of FIG. 4;
FIG. 6 is a cross-sectional view of C-C of FIG. 4;
FIG. 7 is a top view of the structure of the upper coating assembly in the manufacturing process of the present invention;
FIG. 8 is a cross-sectional view taken along line D-D of FIG. 7;
fig. 9 is a schematic structural view of an upper coating member in the manufacturing method of the present invention.
In the figure: 1. a base; 2. a winding mechanism; 21. a furling assembly; 211. a first winding roller; 212. a second winding roller; 213. a first limit ring; 214. a second stop collar; 215. a hydraulic lever; 216. a cross-shaped connector; 217. a bump; 218. a groove; 22. a winding and unwinding assembly; 23. a motor; 24. a pulley set; 3. placing the plate; 4. a modifier storage box; 5. a lower coating roll; 6. coating the assembly; 61. a water pump; 62. a modifier storage tank; 63. a supporting seat; 64. a liquid inlet plate; 65. a sponge head; 66. a cavity; 67. a liquid outlet hole; 68. a liquid outlet pipe; 69. a liquid inlet pipe; 7. and (4) collecting the box.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The invention provides a technical scheme that: the protective film with the function of repairing the scratch-resistant paint surface is prepared from the following components in parts by mass: 4.8 parts of polyamide resin, 3.3 parts of transparent soft rubber, 11.0 parts of TPU resin, 2.2 parts of ultraviolet screening agent, 4.5 parts of curing agent, 1.1 parts of epoxy resin, 0.9 part of emulsifier, 2.3 parts of surface modifier and 5.1 parts of organic solvent.
The transparent soft rubber is PVC and polyamide elastomer.
The curing agent is dimethylbenzylamine and the ultraviolet screening agent is nano titanium dioxide.
The surface modifier is silane coupling agent, and the organic solvent is butanone and toluene.
The preparation method of the protective film with the repaired scratch-resistant paint surface comprises the following steps:
s1, weighing: weighing the components for preparing the scratch-resistant paint protective film by using weighing equipment according to the proportion, placing polyamide resin, transparent soft rubber, an ultraviolet screening agent, a curing agent, an emulsifier and an organic solvent in a container A, placing TPU resin and epoxy resin in a container B and finally placing a surface modifier in a container C during weighing;
s2, primary mixing: adding the components in the container A into a mixer, and mixing for 25min at the rotation speed of 500r/min until the components are fully mixed and reacted;
s3, secondary mixing: adding the components in the container B into the mixture obtained in the step S2, and continuously stirring and mixing for 40min at the rotating speed of 500r/min to obtain a TPU raw material;
s4, stretch forming: feeding the TPU mixture obtained in the step S3 into film forming and stretching equipment, and stretching and forming the TPU mixture to obtain a primary paint surface protective film;
s5, coating: coating a layer of surface modifier on the surface of the primary paint surface protective film in the S4 by using coating equipment, wherein the dry coating amount is 10 mu m, and thus the repaired scratch-resistant paint surface protective film can be obtained;
s6, drying and forming: sending the product obtained in the step S5 into drying equipment, wherein the drying temperature is 40 ℃, the drying time is 8min, and stripping the product by using a film stripping machine;
s7, loading and warehousing: and cutting and winding the steel plate according to the requirements by using a trimming machine and a winding machine, and storing the steel plate in a warehouse.
Example 2
The invention provides a technical scheme that: the protective film with the function of repairing the scratch-resistant paint surface is prepared from the following components in parts by mass: 5.0 parts of polyamide resin, 4.5 parts of transparent soft rubber, 12.0 parts of TPU resin, 2.8 parts of ultraviolet screening agent, 4.6 parts of curing agent, 1.6 parts of epoxy resin, 1.3 parts of emulsifier, 4.4 parts of surface modifier and 6.5 parts of organic solvent.
The transparent soft glue is polyolefin elastomer.
The curing agent is aliphatic isocyanate, and the ultraviolet screening agent is nano titanium dioxide.
The surface modifier is one or more of titanate coupling agent and aluminate coupling agent, and the organic solvent is one or more of methyl isobutyl ketone and ethyl acetate.
The preparation method of the protective film with the repaired scratch-resistant paint surface comprises the following steps:
s1, weighing: weighing the components for preparing the scratch-resistant paint protective film by using weighing equipment according to the proportion, placing polyamide resin, transparent soft rubber, an ultraviolet screening agent, a curing agent, an emulsifier and an organic solvent in a container A, placing TPU resin and epoxy resin in a container B and finally placing a surface modifier in a container C during weighing;
s2, primary mixing: adding the components in the container A into a mixer, and mixing for 28min at the rotation speed of 550r/min until the components are fully mixed and reacted;
s3, secondary mixing: adding the components in the container B into the mixture obtained in the step S2, and continuously stirring and mixing for 45min at the rotation speed of 550r/min to obtain a TPU raw material;
s4, stretch forming: feeding the TPU mixture obtained in the step S3 into film forming and stretching equipment, and stretching and forming the TPU mixture to obtain a primary paint surface protective film;
s5, coating: coating a layer of surface modifier on the surface of the primary paint surface protective film in the S4 by using a micro-concave roller, wherein the dry coating amount is 15 mu m, so that the repaired scratch-resistant paint surface protective film can be obtained;
s6, drying and forming: sending the product obtained in the step S5 into drying equipment, wherein the drying temperature is 80 ℃, the drying time is 10min, and stripping the product by using a membrane stripping machine;
s7, loading and warehousing: and cutting and winding the steel plate according to the requirements by using a trimming machine and a winding machine, and storing the steel plate in a warehouse.
Example 3
The invention provides a technical scheme that: the protective film with the function of repairing the scratch-resistant paint surface is prepared from the following components in parts by mass: 5.6 parts of polyamide resin, 5.0 parts of transparent soft rubber, 13.0 parts of TPU resin, 3.1 parts of ultraviolet screening agent, 4.8 parts of curing agent, 2.0 parts of epoxy resin, 1.6 parts of emulsifier, 6.0 parts of surface modifier and 7.8 parts of organic solvent.
The transparent soft glue is a polyurethane elastomer.
The curing agent is alicyclic isocyanate, and the ultraviolet screening agent is nano titanium dioxide.
The surface modifier is stearic acid, and the organic solvent is one or more of butyl acetate and propylene glycol methyl ether.
The preparation method of the protective film with the repaired scratch-resistant paint surface comprises the following steps:
s1, weighing: weighing the components for preparing the scratch-resistant paint protective film by using weighing equipment according to the proportion, placing polyamide resin, transparent soft rubber, an ultraviolet screening agent, a curing agent, an emulsifier and an organic solvent in a container A, placing TPU resin and epoxy resin in a container B and finally placing a surface modifier in a container C during weighing;
s2, primary mixing: adding the components in the container A into a mixer, and mixing for 30min at the rotating speed of 600r/min until the components are fully mixed and reacted;
s3, secondary mixing: adding the components in the container B into the mixture obtained in the step S2, and continuously stirring and mixing for 50min at the rotating speed of 600r/min to obtain a TPU raw material;
s4, stretch forming: feeding the TPU mixture obtained in the step S3 into film forming and stretching equipment, and stretching and forming the TPU mixture to obtain a primary paint surface protective film;
s5, coating: coating a layer of surface modifier on the surface of the primary paint surface protective film in the S4 by using a micro-concave roller, wherein the dry coating amount is 20 mu m, and thus the repaired scratch-resistant paint surface protective film can be obtained;
s6, drying and forming: sending the product obtained in the step S5 into drying equipment, wherein the drying temperature is 120 ℃, the drying time is 12min, and stripping the product by using a membrane stripping machine;
s7, loading and warehousing: and cutting and winding the steel plate according to the requirements by using a trimming machine and a winding machine, and storing the steel plate in a warehouse.
Referring to fig. 1-2, the coating apparatus described in step S5 includes a base 1, a winding mechanism 2, a placing plate 3 and an upper coating assembly 6 are fixedly mounted on the top of the base 1, a modifier storage box 4 is fixedly mounted on the upper end of the placing plate 3, a lower coating roller 5 penetrates through the interior of the modifier storage box 4, a collecting box 7 is disposed on the upper end of the base 1 and below the winding mechanism 2, the lower surface of the protective film can be coated by pouring a modifier into the interior of the modifier storage box 4, and the collecting box 7 is disposed to collect excessively extruded modifier liquid in time, so as to avoid scattering around, facilitate recycling, and reduce the input cost.
Referring to fig. 3, the winding mechanism 2 includes a motor 23, and a winding component 21 and a winding component 22 having the same structure, one end of the winding component 21 and one end of the winding component 22 are sleeved with a pulley set 24, a power driving end of the motor 23 is connected to the pulley set 24, and the pulley set 24 is driven by the motor 23 to rotate, so as to enable the protective film to be wound and unwound once.
Referring to fig. 4-6, the winding assembly 21 includes a first winding roller 211 and a second winding roller 212, opposite ends of the first winding roller 211 and the second winding roller 212 are respectively sleeved with a first limiting ring 213 and a second limiting ring 214, a hydraulic rod 215 is fixedly installed inside the first winding roller 211, a telescopic end of the hydraulic rod 215 forms a fixed connection structure with the second limiting ring 214 through a cross-shaped connection member 216, a plurality of sets of circumferentially distributed protrusions 217 are fixedly installed inside the second winding roller 212 and on one side of the cross-shaped connection member 216, grooves 218 corresponding to and matching the protrusions 217 are formed inside the first winding roller 211, and by starting the hydraulic rod 215, the distance between the first winding roller 211 and the second winding roller 212 can be extended or shortened under the action of the second limiting ring 214, so that the overall width adjustment of winding and winding can be achieved, and the protective film can be applied to various sizes, but also solves the problems of replacing the winding roller for many times and transferring the protective film for many times, and further improves the coating efficiency and the use convenience.
Referring to fig. 7-9, the upper coating assembly 6 includes a water pump 61, a modifier storage tank 62 and a support base 63, a liquid inlet plate 64 is fixedly installed at one side of the support base 63, a sponge head 65 is fixedly installed at the bottom of the liquid inlet plate 64, a cavity 66 is formed inside the liquid inlet plate 64, a plurality of groups of liquid outlet holes 67 are formed at one end of the bottom of the cavity 66, the liquid inlet plate 64 is inclined, a water inlet end of the water pump 61 and the modifier storage tank 62 form a communicated fixed connection structure through a liquid outlet pipe 68, a water outlet end of the water pump forms a communicated fixed connection structure with the cavity 66 through a liquid inlet pipe 69, and the upper surface of the protective film can be coated under the action of the liquid outlet holes 67 and the sponge head 65 by starting the water pump 61.
The working principle of the coating equipment of the invention is as follows: when the protective film winding and unwinding device is used, the lengths of the winding assembly 21 and the winding assembly 22 are correspondingly adjusted according to the width of the protective film, and only the hydraulic rod 215 needs to be started, the telescopic end of the hydraulic rod can apply a pushing force to the cross-shaped connecting piece 216, and under the action of the second limiting ring 214, the second winding roller 212 can be driven to move along the direction of the groove 218 until the distance between the first limiting ring 213 and the second limiting ring 214 is the same as the width of the protective film.
At this time, the protective film can be wound on the winding assembly 21 and the winding and unwinding assembly 22, then the modifier liquid is poured into the modifier storage box 4, the motor 23 and the water pump 61 are started, when the motor 23 is started, the protective film can be pulled to be wound, in the winding process, the coating roller 5 can be driven to roll in the modifier storage box 4, so that the effect of coating the lower surface of the protective film is achieved, the water pump 61 is started, under the action of the liquid outlet pipe 68, the modifier liquid in the modifier storage box 62 can be sucked out, enters the cavity 66 through the liquid inlet pipe 69, finally, under the action of the liquid outlet hole 67, the modifier liquid is immersed in the sponge head 65, and along with the continuous winding of the protective film, the effect of coating the upper surface can be achieved.
PVC can be divided into: the PVC resin comprises general PVC resin, high-polymerization-degree PVC resin and cross-linked PVC resin, wherein the general PVC resin is formed by polymerizing vinyl chloride monomers under the action of an initiator; the high polymerization degree PVC resin is a resin obtained by adding a chain extender into a polymerization system of vinyl chloride monomers for polymerization; the cross-linked PVC resin is obtained by adding a cross-linking agent containing diene and polyene into a vinyl chloride monomer polymerization system and polymerizing.
The polyamide elastomer is composed of a high-melting crystalline hard segment (polyamide) and a non-crystalline soft segment (polyester or polyether), and the properties of the polyamide elastomer depend on the type of the hard segment and the length of the two blocks. Due to the existence of the hard-segment polyamide, the polyamide thermoplastic elastomer has excellent toughness, chemical resistance, wear resistance and noise reduction. By selecting and controlling the block type, the mechanical, thermal and chemical properties can be varied over a wide range.
The polyolefin thermoplastic elastomer is a high-performance polyolefin product, has rubber elasticity at normal temperature, and has the characteristics of small density, large bending, high low-temperature impact resistance, easy processing, reusability and the like.
The self-repairing scratch resistance, uv resistance, insulation rate, and impact resistance of the prepared components of the repaired scratch-resistant paint protective films of examples 1, 2, and 3 were tested, and the test results are shown in the following table:
| self-repairing scratch resistance | Ultraviolet ray resistance | Insulation rate | Impact resistance | |
| Example 1 | 98.6% | Qualified | 99.1% | Qualified |
| Example 2 | 99.5% | Qualified | 99.6% | Qualified |
| Example 3 | 97.9% | Qualified | 99.4% | Qualified |
The test methods for the properties in the table are as follows:
1. and (3) judging the self-repairing scratch resistance: and wiping a plurality of scratches on the surface of the protective film by using a special scribing tool, placing the test sample in a 70-degree environment, observing for 10min, and taking out to check the recovery condition of the scratches.
2. And (3) judging the ultraviolet resistance: the paint protective film is attached to an automobile, then placed at a high temperature of 40 ℃ outdoors for 30min, and detected by an ultraviolet detector.
3. And (3) judging the insulation rate: a paint protective film was attached to the surface of the support body to see whether or not bubbles were generated.
4. And (3) judging the impact resistance: the surface of the paint protective film was hammered back and forth a plurality of times by a special impact tool, and then it was checked whether there was any trace in appearance.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The protective film for repairing the scratch-resistant paint surface is characterized by comprising the following components: polyamide resin, transparent soft rubber, TPU resin, ultraviolet screening agent, curing agent, epoxy resin, emulsifier, surface modifier and organic solvent;
the protective film with the repaired scratch-resistant paint surface is prepared from the following components in parts by mass: 4.8-5.6 parts of polyamide resin, 3.3-5.0 parts of transparent soft rubber, 11.0-13.0 parts of TPU resin, 2.2-3.1 parts of ultraviolet screening agent, 4.5-4.8 parts of curing agent, 1.1-2.0 parts of epoxy resin, 0.9-1.6 parts of emulsifier, 2.3-6.0 parts of surface modifier and 5.1-7.8 parts of organic solvent.
2. The protective film for repairing scratch-resistant paint surfaces according to claim 1, which is prepared from the following components in parts by mass: 4.8 parts of polyamide resin, 3.3 parts of transparent soft rubber, 11.0 parts of TPU resin, 2.2 parts of ultraviolet screening agent, 4.5 parts of curing agent, 1.1 parts of epoxy resin, 0.9 part of emulsifier, 2.3 parts of surface modifier and 5.1 parts of organic solvent.
3. The protective film for repairing scratch-resistant paint surfaces according to claim 1, which is prepared from the following components in parts by mass: 5.0 parts of polyamide resin, 4.5 parts of transparent soft rubber, 12.0 parts of TPU resin, 2.8 parts of ultraviolet screening agent, 4.6 parts of curing agent, 1.6 parts of epoxy resin, 1.3 parts of emulsifier, 4.4 parts of surface modifier and 6.5 parts of organic solvent.
4. The protective film for repairing scratch-resistant paint surfaces according to claim 1, which is prepared from the following components in parts by mass: 5.6 parts of polyamide resin, 5.0 parts of transparent soft rubber, 13.0 parts of TPU resin, 3.1 parts of ultraviolet screening agent, 4.8 parts of curing agent, 2.0 parts of epoxy resin, 1.6 parts of emulsifier, 6.0 parts of surface modifier and 7.8 parts of organic solvent.
5. The protective film for repairing scratch-resistant paint surface according to claim 1, wherein the transparent soft rubber is one or more of PVC, polyamide elastomer, polyolefin elastomer and polyurethane elastomer, the curing agent is one or more of dimethylbenzylamine, aliphatic isocyanate and alicyclic isocyanate, the ultraviolet shielding agent is nano titanium dioxide, the surface modifier is one or more of silane coupling agent, titanate coupling agent, aluminate coupling agent and stearic acid, and the organic solvent is one or more of butanone, toluene, methyl isobutyl ketone, ethyl acetate, butyl acetate and propylene glycol methyl ether.
6. A method for preparing a protective film for repairing scratch-resistant paint surface according to any one of claims 1 to 5, comprising the steps of: s1, weighing: weighing the components for preparing the repaired scratch-resistant paint surface protective film according to the proportion by using a weighing device, during weighing, placing polyamide resin, transparent soft rubber, an ultraviolet screening agent, a curing agent, an emulsifier and an organic solvent in a container A, placing TPU resin and epoxy resin in a container B, and finally placing a surface modifier in a container C;
s2, primary mixing: adding the components in the container A into a mixer, wherein the mixing time is 25-30min, and the rotating speed is 500-600r/min until the components are fully mixed and reacted;
s3, secondary mixing: adding the components in the container B into the mixture obtained in the step S2, and continuously stirring and mixing for 40-50min at the rotating speed of 500-600r/min to obtain the TPU raw material;
s4, stretch forming: feeding the TPU mixture obtained in the step S3 into film forming and stretching equipment, and stretching and forming the TPU mixture to obtain a primary paint surface protective film;
s5, coating: coating a layer of surface modifier on the surface of the primary paint surface protective film in the S4 by using coating equipment, wherein the dry coating amount is 10-20 mu m, so that the repaired scratch-resistant paint surface protective film can be obtained;
s6, drying and forming: sending the product obtained in the step S5 into drying equipment, wherein the drying temperature is 40-120 ℃, the drying time is 8-12 min, and stripping the product by using a film stripping machine;
s7, loading and warehousing: cutting and winding the fabric according to requirements by using a trimming machine and a winding machine, and storing the fabric in a warehouse;
the coating device in the step S5 comprises a base (1), wherein a winding mechanism (2), a placing plate (3) and an upper coating assembly (6) are fixedly mounted at the top of the base (1), a modifier storage box (4) is fixedly mounted at the upper end of the placing plate (3), a lower coating roller (5) penetrates through the interior of the modifier storage box (4), and a collecting box (7) is arranged at the upper end of the base (1) and below the winding mechanism (2).
7. A method as in claim 6, characterized in that the winding mechanism (2) comprises a motor (23) and a winding-up assembly (21) and a winding-down assembly (22) of identical construction, one end of the winding-up assembly (21) and one end of the winding-down assembly (22) being jointly sleeved with a pulley set (24).
8. The preparation method according to claim 7, wherein the winding assembly (21) comprises a first winding roller (211) and a second winding roller (212), wherein the opposite ends of the first winding roller (211) and the second winding roller (212) are respectively sleeved with a first limiting ring (213) and a second limiting ring (214), a hydraulic rod (215) is fixedly installed inside the first winding roller (211), the telescopic end of the hydraulic rod (215) forms a fixed connection structure with the second limiting ring (214) through a cross connecting piece (216), a plurality of groups of circumferentially distributed convex blocks (217) with equal distance are fixedly installed inside the second winding roller (212) and on one side of the cross connecting piece (216), and grooves (218) which are in one-to-one correspondence with the convex blocks (217) and are matched with the convex blocks (217) are formed inside the first winding roller (211).
9. The preparation method of claim 6, wherein the upper coating assembly (6) comprises a water pump (61), a modifier storage tank (62) and a support base (63), a liquid inlet plate (64) is fixedly installed on one side of the support base (63), a sponge head (65) is fixedly installed at the bottom of the liquid inlet plate (64), a cavity (66) is formed in the liquid inlet plate (64), and a plurality of groups of liquid outlet holes (67) are formed in one end of the bottom of the cavity (66) at equal intervals.
10. A method according to claim 9, characterized in that the liquid inlet plate (64) is inclined, the water inlet end of the water pump (61) is connected to the modifier storage tank (62) through a liquid outlet pipe (68) to form a through fixed connection, the water outlet end of the water pump is connected to the cavity (66) through a liquid inlet pipe (69) to form a through fixed connection, and the power driving end of the motor (23) is connected to the pulley block (24).
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| CN202110845648.9A CN113501987A (en) | 2021-07-26 | 2021-07-26 | Anti-scratch paint surface protective film with repairing function and preparation method thereof |
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| CN114015146A (en) * | 2021-12-23 | 2022-02-08 | 无锡胶大电子材料有限公司 | PE (polyethylene) protective film material for automobiles and preparation method thereof |
| CN115572570B (en) * | 2021-12-23 | 2024-02-20 | 山西天启通液压有限公司 | Rubber protection coating film and preparation method thereof |
| KR20230167944A (en) * | 2022-06-03 | 2023-12-12 | 에스케이마이크로웍스 주식회사 | Film for paint protection and manufacturing method of the same |
| CN115477841A (en) * | 2022-10-14 | 2022-12-16 | 欣润新材料科技(江苏)有限公司 | Preparation method of automobile paint protective film |
| CN115651247A (en) * | 2022-11-09 | 2023-01-31 | 欣润新材料科技(江苏)有限公司 | Anti-aging invisible car cover film with self-repairing function and manufacturing process thereof |
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| CN109385223A (en) * | 2018-08-10 | 2019-02-26 | 中国科学院化学研究所 | A kind of protective film |
| JP2019181826A (en) * | 2018-04-11 | 2019-10-24 | Jnc株式会社 | Protective film and method for producing the same |
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| CN103073879A (en) * | 2012-09-26 | 2013-05-01 | 天津金发新材料有限公司 | Polyamide composition, and preparation method and application thereof |
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| JP2019181826A (en) * | 2018-04-11 | 2019-10-24 | Jnc株式会社 | Protective film and method for producing the same |
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