A polypropylene decorative film for a floor surface finish and a method for manufacturing the same

Abstract

The application discloses a polypropylene decorative film for floor surface decoration and a preparation method thereof. The polypropylene decorative film is composed of a polypropylene base film layer, a printing layer, a breathable wear-resistant layer and a back adhesive layer. The breathable wear-resistant layer comprises 30-40 parts of polyether ether ketone resin, 15-25 parts of polyether block amide elastomer, 15-25 parts of polyhedral oligomeric silsesquioxane, 15-25 parts of wear-resistant filler, 4-5 parts of photoinitiator, 0.1-8 parts of matting powder, 1-3 parts of leveling agent and 0.1-0.5 parts of defoaming agent. The wear-resistant filler is treated by a coupling agent. The polypropylene decorative film for floor surface decoration is combined with the polyether ether ketone resin, the polyhedral oligomeric silsesquioxane, the polyether block amide elastomer and the wear-resistant filler. Under the action of the photoinitiator, polymerization, cross-linking and other reactions occur, so that the polypropylene decorative film has good breathability, better wear resistance, scratch resistance and impact toughness.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of decorative film, in particular to a polypropylene decorative film for floor surface finishing and a preparation method thereof. BACKGROUND

[0002] The decorative film is a new type of decorative material made of high molecular polymer (PVC) as raw material, adding various additives, and then being calendered and compounded. It can be compounded with wood, plastic board, aluminum plate, iron plate and other substrates to make multi-purpose decorative materials, which are widely used in household appliances, surface decoration of audio, indoor decoration, interior decoration of airplanes, ships and trains, and also can be used in billboards, etc. The main method of bonding decorative film and substrate is to bond them with glue under certain temperature and pressure, which is a relatively complex process. As a kind of finishing material, the decorative film has back adhesive, and when it is bonded with the substrate, it only needs to tear off the back release paper and then stick it on the base material. The operation is convenient and simple. At present, the self-adhesive decorative film on the market is mainly PVC. However, due to the problems of PVC material itself, such as containing chlorine, plasticizer, being difficult to degrade, releasing dioxins and other heavy environmental problems, some countries have successively proposed plastic restriction order to limit the use of PVC.

[0003] Polypropylene (PP) is a polymer with good high temperature resistance, toughness, and strong chemical corrosion resistance. The material itself does not contain chlorine element, does not contain formaldehyde, heavy metals and other harmful substances, and has excellent comprehensive performance. It is the most promising thermoplastic polymer material today. However, polypropylene itself is a non-polar polymer. Although it has good wear resistance, it is easy to scratch, making the product not durable. Especially when it is applied to the surface of the floor, the floor needs good ventilation performance to volatilize the gas evaporated from the ground to avoid affecting the bonding performance between the floor and the ground. Due to the poor ventilation of the decorative board on the market, it will produce the phenomenon of bulging after long-term use, which is difficult to repair.

[0004] In the existing literature, CN112940635A discloses a polypropylene decorative film for floor surface finishing, which is composed of a polypropylene base film layer, a printing layer, a polypropylene breathable wear-resistant layer and a back adhesive layer. The polypropylene breathable wear-resistant layer is composed of the following components: polypropylene resin 93%-97%, nano calcium carbonate 3-8%, POE (polyethylene-octene co-elastic body) 2-10%, nucleating transparent agent 0.2-1%, polyurethane 0.2-0.5%, and polyethylene wax 0.5-2%. In the above technology, the polypropylene breathable wear-resistant layer is added on the polypropylene base film layer. By using polypropylene resin, nano calcium carbonate, POE, polyurethane and other materials, the wear resistance and impact toughness of the decorative film are improved. However, there is still a problem of air permeability. In addition, the surface of the floor is hydrophobic, which can easily produce bubbles on the surface of the substrate during the bonding process, affecting the bonding performance between the substrate and the decorative film. SUMMARY

[0005] In order to overcome the deficiencies of the prior art, one of the purposes of the present application is to provide a polypropylene decorative film for floor surface decoration to solve the problems of the conventional technology, which has better air permeability and better wear resistance, scratch resistance and impact toughness.

[0006] The second purpose of the present application is to provide a preparation method of a polypropylene decorative film for floor surface decoration.

[0007] One of the purposes of the present application is achieved by the following technical scheme:

[0008] A polypropylene decorative film for floor surface decoration, which is composed of a polypropylene base film layer, a printing layer, an air-permeable wear-resistant layer and a back adhesive layer, wherein the back adhesive layer is attached to one side of the polypropylene base film layer, the printing layer is printed on the other side of the polypropylene base film layer, and the air-permeable wear-resistant layer is coated on the surface of the printing layer, wherein the air-permeable wear-resistant layer comprises the following components by weight: polyether ether ketone resin 30-40 parts, polyether block amide elastomer 15-25 parts, polyhedral oligomeric silsesquioxane 15-25 parts, wear-resistant filler 15-25 parts, photoinitiator 4-5 parts, matting powder 0.1-8 parts, leveling agent 1-3 parts, and defoaming agent 0.1-0.5 parts, and the wear-resistant filler is treated with 3-(trimethoxysilyl) propyl methacrylate coupling agent.

[0009] That is, the polypropylene decorative film for floor surface decoration of the present application uses polyether ether ketone resin, polyhedral oligomeric silsesquioxane, polyether block amide elastomer, wear-resistant filler and the like in combination, and under the action of a photoinitiator, polymerization, cross-linking and other reactions occur, so that it has better air permeability and better wear resistance, scratch resistance and impact toughness.

[0010] Among them, polyether ether ketone (PEEK) is an aromatic crystalline thermoplastic polymer material, which has high mechanical strength, high temperature resistance, impact resistance, flame resistance, acid and alkali resistance, hydrolysis resistance, wear resistance, fatigue resistance, radiation resistance and good electrical properties.

[0011] Polyhedral oligomeric silsesquioxane is a kind of polycyclic organic monomer composed of a silicon framework and its embedded oxygen atoms, forming a gear-like structure of multiple silicon rings, which forms good air permeability in the system.

[0012] Further, the mass ratio of the polyamide segment and the polyether segment in the polyether block amide elastomer is 1:0.2, and the melt index is 50g / 10min-60g / 10min. By controlling the ratio of the polyamide segment and the polyether segment in the elastomer, and simultaneously controlling the melt index, the main frame has good resilience. The polyamide segment is obtained by condensation polymerization of carboxylic acid polyamide and terminal alcohol polyether (polyethylene glycol PTMG, PEG).

[0013] Further, the wear-resistant filler is one or more of aluminum oxide, titanium dioxide, and barium sulfate.

[0014] Further, the photoinitiator is 2-hydroxy-2-methyl-1-phenyl-1-propanone, the matting powder is silicon dioxide, the leveling agent is polyester modified polydimethylsiloxane, and the defoaming agent is polysiloxane.

[0015] Further, the mass ratio of the polyether ether ketone resin, the polyether block amide elastomer, and the wear-resistant filler is 1:(0.5-0.6):(0.5-0.6).

[0016] Further, the surface of the back adhesive layer is provided with a groove type embossing, and the back adhesive layer comprises the following components by weight:

[0017] Acrylamide monomer SW941 is 20-30 parts, poly(ethylene glycol) methacrylate is 5-10 parts, 2-hydroxyethyl methacrylate phosphate is 5-10 parts, acrylamide monomer SW925 is 0.5-2 parts, nano Al2O3 particles are 0.01-0.1 parts, potassium persulfate-sodium thiosulfate-copper sulfate initiator is 1-5 parts, and deionized water is 30-50 parts.

[0018] That is, the back adhesive layer of the present application can enhance the compatibility between the back adhesive layer and the polypropylene base film layer by one-step coating by using acrylamide monomer SW941, acrylamide monomer SW925, and other monomers, poly(ethylene glycol) methacrylate, 2-hydroxyethyl methacrylate phosphate, potassium persulfate-sodium thiosulfate-copper sulfate initiator, and other components, thereby enhancing the adhesion between them. Through the self-crosslinking reaction of each monomer, the back adhesive layer can be better adhered to the base material, and by using the structure of the groove type embossing of the back adhesive layer and the effect of nano Al2O3 particles, gas is discharged, so that the surface of the film does not produce bubbles, and the lamination effect is better.

[0019] Among them, acrylamide monomer SW941 is a room temperature self-crosslinking monomer, which can copolymerize with acrylate monomers, methacrylate phosphate monomers and other monomers. The obtained copolymer has good initial adhesion, strong cohesion, and can enhance the adhesion of the back adhesive layer and the base material.

[0020] The poly(ethylene glycol) methacrylate has both hydrophobic and hydrophilic monomers, and after adding it, the compatibility of the back adhesive layer and the polypropylene base film layer can be enhanced, and the polymerization degree of the system can also be enhanced to form a strong crosslinking network.

[0021] The 2-hydroxyethyl methacrylate phosphate ester has multiple functional groups such as hydroxyl groups, double bonds, and phosphate esters, and can enhance the adhesion and bonding of the system to the surface finish of furniture, walls, and wainscots.

[0022] The acrylamide monomer SW925 is a high-temperature self-crosslinking monomer compared to the acrylamide monomer SW941. The heat generated by the polymerization of the acrylamide monomer SW941 and other monomers can also be combined with external heat to enable anti-graft polymerization with unreacted monomers in the system. After the water is volatilized, a self-crosslinking reaction occurs, further enhancing the adhesion of the system to the substrate.

[0023] The nano-Al2O3 particles have a particle size of 30-60 nm. The use of nano-Al2O3 particles is beneficial for combining grooved embossing and gas discharge during the process of applying the film, so that the surface of the applied film does not produce bubbles, and the application effect is better.

[0024] Further, the mass ratio of the acrylamide monomer SW941, the poly(ethylene glycol) methacrylate, and the 2-hydroxyethyl methacrylate phosphate ester is 1:(0.2-0.5):(0.3-0.4).

[0025] Preferably, the mass ratio of the acrylamide monomer SW941, the poly(ethylene glycol) methacrylate, and the 2-hydroxyethyl methacrylate phosphate ester is 1:0.4:0.3.

[0026] Further, the mass ratio of the acrylamide monomer SW925 and deionized water is (0.05-0.07):1. By controlling the water content, the self-crosslinking reaction of the acrylamide monomer SW925 in the later stage is enhanced, and the overall adhesion is stronger.

[0027] Preferably, the mass ratio of the acrylamide monomer SW925 and deionized water is (0.05-0.07):1.

[0028] Further, the acrylamide monomer SW941 and the acrylamide monomer SW925 are purchased from Guangzhou Sanwang Chemical Material Co., Ltd.

[0029] Further, the nano-Al2O3 particles are nano-Al2O3 particles treated by 3-(trimethoxysilyl)propyl methacrylate (MPS) coupling agent, and research shows that the nano-Al2O3 particles treated by the MPS coupling agent can increase the oil-wet property of the surface and inhibit the escape phenomenon of the nano-Al2O3 particles from the oil phase to the water phase.

[0030] Further, the groove embossing is a semicircular structure, and the diameter of the groove embossing is 0.2-0.4 mm. By controlling the size of the groove embossing, the adhesion performance is improved.

[0031] One of the purposes of the present application is also achieved by using the following technical scheme:

[0032] A polypropylene decorative film for floor surface finishing is composed of a polypropylene base film layer, a printing layer, a breathable wear-resistant layer and a back adhesive layer, the back adhesive layer is attached to one side of the polypropylene base film layer, the printing layer is printed on the other side of the polypropylene base film layer, and the breathable wear-resistant layer is coated on the surface of the printing layer.

[0033] The polypropylene base film layer comprises the following components by weight:

[0034] Copolymerized polypropylene (PP-R) 85-92 parts, polyhedral oligomeric silsesquioxane 20-30 parts, light calcium carbonate 5-10 parts, color master batch 4-15 parts, nano-titanium dioxide 1-3 parts, polyurethane antistatic agent 0.2-0.5 parts, and dispersant polyethylene wax 0.5-1.5 parts; wherein the polypropylene base film layer is prepared by mixing and melting the above components and then extruding a sheet-shaped base film, and the thickness of the base film is 0.10-0.20 mm.

[0035] The base film has high strength, good heat resistance, good dimensional stability and excellent low-temperature toughness (good flexibility). The random copolymer polypropylene (PP-R) is obtained by copolymerizing propylene monomer and a small amount of ethylene (1-4%) monomer under the action of heating, pressurization and catalyst, and the ethylene monomer is randomly and randomly distributed in the long chain of propylene. The random addition of ethylene reduces the crystallinity and melting point of the polymer, and improves the impact, long-term heat-oxidative aging and processing performance of the material. Light calcium carbonate has a great effect on the overall stability of the product, and can also improve the hardness and surface smoothness of the product. Nano titanium dioxide white loose powder can enhance the hiding power of the product. Due to its high refractive index and high photoactivity, it has the ability to resist ultraviolet rays, and can improve the anti-aging performance of the product. Its anti-ultraviolet ability and mechanism are related to its particle size: when the particle size is large, the blocking of ultraviolet rays is mainly reflection and scattering, and it is effective for both medium and long wave ultraviolet rays. The anti-aging mechanism is simple covering, which belongs to general physical effect, and the anti-aging ability is weak; with the decrease of particle size, light can penetrate the particle surface of nano titanium dioxide, and the reflection and scattering of long wave ultraviolet rays are not obvious, but the absorption of medium wave ultraviolet rays is obviously enhanced. Its anti-aging mechanism is to absorb ultraviolet rays, mainly absorbing medium wave ultraviolet rays; at the same time, adding polyhedral oligomeric silsesquioxane makes it also have good air permeability.

[0036] Therefore, the anti-aging mechanism of nano titanium dioxide for different wavelengths of ultraviolet rays is different. The blocking of long wave ultraviolet rays is mainly scattering, and the blocking of medium wave ultraviolet rays is mainly absorption. Nano titanium dioxide shows excellent absorption performance in different wavelength regions, and compared with other anti-ultraviolet agents, nano titanium dioxide has the characteristics of non-toxicity, stable performance and good effect. The polyurethane antistatic agent is a high molecular permanent antistatic agent, which conducts and releases the generated static charge through ion conduction, and reduces the volume resistivity of the material to achieve antistatic effect, which is not completely dependent on surface water absorption, so it is less affected by the humidity of the environment, and has long-lasting and efficient antistatic effect.

[0037] The printing layer comprises the following components by weight:

[0038] Water-soluble acrylic resin 55-60 parts, pigment 15-20 parts, main solvent water 15-20 parts, auxiliary solvent ethanol 5-8 parts, dispersing agent sodium oleate 1-3 parts, anti-ultraviolet agent nano titanium dioxide 1-3 parts; wherein the printing layer is dispersed and uniformly mixed, filtered and other process technologies to form ink, and then the ink is printed on the polypropylene base film layer by a gravure printing machine. The pigment is one or more than two of benzidine yellow, permanent magenta, carbon black and phthalocyanine blue. The ink is environmentally friendly and safe, has good adhesion, full and realistic color, and light fastness of up to blue wool 6 level.

[0039] The air-permeable wear-resistant layer comprises the following components by weight: polyether ether ketone resin 30-40 parts, polyether block amide elastomer 15-25 parts, polyhedral oligomeric silsesquioxane 15-25 parts, wear-resistant filler 15-25 parts, photoinitiator 4-5 parts, matting powder 0.1-8 parts, leveling agent 1-3 parts, and defoaming agent 0.1-0.5 parts; the air-permeable wear-resistant layer is formed by coating the above-mentioned photocuring coating on the printing layer by a coating machine, and the coating thickness is 10-30 microns.

[0040] The back adhesive layer is provided with a groove type embossing on the surface of the release paper, and the back adhesive layer comprises the following components by weight:

[0041] Acrylamide monomer SW94120-30 parts, poly(ethylene glycol) methacrylate 5-10 parts, 2-hydroxyethyl methacrylate phosphate 5-10 parts, acrylamide monomer SW9250.5-2 parts, nano-Al2O3 particles 0.01-0.1 parts, potassium persulfate-sodium thiosulfate-copper sulfate initiator 1-5 parts, and deionized water 30-50 parts;

[0042] The groove type embossing is a semi-circular structure, and the diameter of the groove type embossing is 0.2-0.4 mm.

[0043] The back adhesive layer is coated with back adhesive by a coating machine, has good compatibility with polypropylene, is non-toxic and non-water-absorbing, has good adhesion, can be attached to a base plate at room temperature, and has good water resistance, acid and alkali resistance, and weather resistance.

[0044] The second purpose of the application is achieved by the following technical scheme:

[0045] A preparation method of a polypropylene decorative film for floor surface decoration comprises the following preparation steps:

[0046] S1: uniformly mix raw materials of a polypropylene base film layer according to a formula, then put them into a bottom film machine for heating, mixing, melting, extruding a sheet-shaped base film, and performing corona treatment to obtain the polypropylene base film layer;

[0047] S2: uniformly mix inks of a printing layer, then pour them into an ink tank of a printing machine, adjust the temperature of an oven to 100-110 DEG C, adjust the printing speed after winding, start printing on the surface of the polypropylene base film layer to form the printing layer;

[0048] S3: the air permeable wear-resistant layer coating is mixed uniformly, homogenized under ultrasonic vibration, then poured into a coating machine coating tank, the coating machine temperature is adjusted to 60-120 DEG C, the parameters of the excimer-UV system are adjusted, after the printing film is wound, the coating speed is adjusted, the air permeable wear-resistant layer is coated on the printing layer to form;

[0049] S4: the raw materials of the back adhesive layer are mixed uniformly, then homogenized under ultrasonic vibration, poured into a coating machine glue tank, the coating machine temperature is adjusted to 110-125 DEG C, the coating speed is 20-25 m / min, and the coating amount is 30-60 g / m 2 The polypropylene decorative film is coated on the other side of the polypropylene base film layer, and a groove type embossing with a diameter of 0.2-0.4 mm is formed on the surface of the polypropylene decorative film by using a grooving machine.

[0050] In use, two processes of flat pasting and coating can be adopted, and specifically:

[0051] Flat pasting:

[0052] Equipment: flat pasting machine, glue application amount 50-60 g / m 2 , pasting pressure 0.4 MPa, pasting speed 20 m / min to 25 m / min.

[0053] Coating:

[0054] Equipment: coating machine, glue application temperature about 120 DEG C, glue application amount 30-40 g / m 2 , pressure 0.4-0.5 MPa, pasting speed 20 m / min to 25 m / min.

[0055] Compared with the prior art, the polypropylene decorative film for floor surface decoration has the beneficial effects that:

[0056] 1. The polypropylene decorative film for floor surface decoration adopts polyether ether ketone resin, polyhedral oligomeric silsesquioxane, polyether block amide elastomer, wear-resistant filler and the like, and under the action of a photoinitiator, polymerization, crosslinking and the like reactions occur, so that the polypropylene decorative film has good air permeability and better wear resistance, scratch resistance and impact toughness.

[0057] 2. The polypropylene decorative film for floor surface decoration uses acrylamide monomer SW941, acrylamide monomer SW925 and the like, combines poly(ethylene glycol) methacrylate, 2-hydroxyethyl methacrylate phosphate, potassium persulfate-sodium thiosulfate-copper sulfate initiator and the like, can enhance the compatibility between the back adhesive layer and the polypropylene base film layer in one step, thereby enhancing the adhesion between them, and through the self-crosslinking reaction of each monomer, the back adhesive layer can be better pasted on the base material, and by using the groove type embossing structure of the back adhesive layer and the action of nano Al2O3 particles, gas is discharged, so that the surface of the pasted film does not produce bubbles, and the pasting effect is better. DETAILED DESCRIPTION

[0058] Hereinafter, the present application will be further described in conjunction with specific embodiments, it should be noted that the following described embodiments or technical features can be combined arbitrarily to form new embodiments without conflict.

[0059] Embodiment 1

[0060] A polypropylene decorative film for floor surface finishing, comprising a polypropylene base film layer, a printing layer, a breathable wear-resistant layer, and a back adhesive layer, the back adhesive layer is attached to one side of the polypropylene base film layer, the printing layer is printed on the other side of the polypropylene base film layer, and the breathable wear-resistant layer is coated on the surface of the printing layer,

[0061] The polypropylene base film layer comprises the following components by weight:

[0062] copolymerized polypropylene 90 parts, polyhedral oligomeric silsesquioxane 20 parts, light calcium carbonate 6 parts, color master batch 4 parts, nano titanium dioxide 1 part, polyurethane antistatic agent 0.2 parts, and dispersant polyethylene wax 0.5 parts;

[0063] The printing layer comprises the following components by weight:

[0064] water-soluble acrylic resin 55 parts, carbon black 15 parts, main solvent water 18 parts, auxiliary solvent ethanol 5 parts, dispersant sodium oleate 2 parts, and anti-ultraviolet agent nano titanium dioxide 3 parts;

[0065] The breathable wear-resistant layer comprises the following components by weight:

[0066] polyether ether ketone resin 33 parts, polyether block amide elastomer 18 parts, polyhedral oligomeric silsesquioxane 25 parts, wear-resistant filler 20 parts, 2-hydroxy-2-methyl-1-phenyl-1-propanone 4 parts, silicon dioxide 0.1 parts, polyester modified polydimethylsiloxane 3 parts, and polysiloxane 0.5 parts, the wear-resistant filler is barium sulfate treated with 3-(trimethoxysilyl) propyl methacrylate coupling agent;

[0067] The back adhesive layer is provided with a groove type embossing on the surface of the release paper, and the back adhesive layer comprises the following components by weight:

[0068] acrylamide monomer SW941 120 parts, poly(ethylene glycol) methacrylate 5 parts, 2-hydroxyethyl methacrylate phosphate ester 5 parts, acrylamide monomer SW925 0.5 parts, nano Al2O3 particles 0.01 parts, potassium persulfate-sodium thiosulfate-copper sulfate initiator 1 part, and deionized water 50 parts;

[0069] The groove embossing is a semi-circular structure, and the diameter of the groove embossing is 0.3mm.

[0070] The preparation method of the floor surface finishing polypropylene decorative film comprises the following preparation steps:

[0071] S1: uniformly mixing raw materials of the polypropylene base film layer according to a formula, then feeding into a bottom film machine for heating, mixing, melting, extruding a sheet-shaped base film, and performing corona treatment to obtain a polypropylene base film layer with a thickness of 0.10mm;

[0072] S2: uniformly mixing ink of the printing layer, then pouring into an ink tank of a printing machine, adjusting an oven temperature to 110℃, adjusting a printing speed after winding, starting to print on the surface of the polypropylene base film layer to form a printing layer;

[0073] S3: uniformly mixing coating of the air-permeable wear-resistant layer, homogenizing under ultrasonic vibration, then pouring into a coating tank of a coating machine, adjusting a coating machine temperature to 100℃, adjusting parameters of an Excimer-UV system, adjusting a coating speed after winding the printing film, starting to coat on the printing layer to form an air-permeable wear-resistant layer with a thickness of 15μm;

[0074] S4: uniformly mixing raw materials of the back adhesive layer, then homogenizing under ultrasonic vibration, pouring into a glue tank of the coating machine, adjusting a coating machine temperature to 120℃, using a coating machine to coat at a coating speed of 25m / min, a coating amount of 40g / m 2 , a pressure of 0.4MPa on the other side of the polypropylene base film layer, and using a groove embossing machine to form groove embossing on the surface, and in use, the back adhesive layer is attached to a material.

[0075] Example 2

[0076] Different from example 1, the air-permeable wear-resistant layer of the floor surface finishing polypropylene decorative film of example 2 comprises the following components by weight: polyether ether ketone resin 40 parts, polyether block amide elastomer 20 parts, polyhedral oligomeric silsesquioxane 15 parts, wear-resistant filler 15 parts, photoinitiator 5 parts, matting powder 0.1 part, leveling agent 3 parts, defoaming agent 0.1 part, and the wear-resistant filler is alumina treated with 3-(trimethoxysilyl) propyl methacrylate coupling agent.

[0077] Other components and preparation methods are the same as those of example 1.

[0078] Example 3

[0079] The polypropylene decorative film for floor surface finishing of Example 3 is different from Example 1 in that the air permeable wear-resistant layer of the polypropylene decorative film for floor surface finishing comprises the following components by weight: polyether ether ketone resin 38 parts, polyether block amide elastomer 22 parts, polyhedral oligomeric silsesquioxane 20 parts, wear-resistant filler 15 parts, photoinitiator 5 parts, matting powder 0.1 part, leveling agent 3 parts, defoaming agent 0.1 part, and the wear-resistant filler is titanium dioxide treated with 3-(trimethoxysilyl) propyl methacrylate coupling agent. The other components and the preparation method are the same as those of Example 1.

[0080] Comparative Example 1

[0081] Comparative Example 1 is a polypropylene decorative film for floor surface finishing of CN112940635A.

[0082] Performance Test

[0083] The polypropylene decorative films for floor surface finishing of Examples 1-3 and Comparative Example 1 were subjected to the following performance tests, and the test standards and test results are shown below.

[0084] 1. Test Standard

[0085] Surface hardness: GB / T 17657-2013 4.57; surface scratch resistance: GB / T 17657-2013 4.39; VOC measurement: HJT-400-2007; tensile strength: GB / T 3830-2008; elongation at break: GB / T 3830-2008; peel strength: ASTM D571-2011; light color fastness: CFFA-2C; gloss: standard ISO 2813; wear resistance: using a wear-resistant tool to rotate on the surface of the product, and observing the surface wear resistance rotation number; impact resistance: impacting the surface of the reinforced floor with a ball at a height of 1.5 meters to measure the impact resistance, and measuring the diameter of the dent formed on the surface of the test piece with a vernier caliper; gas permeability: ASTM D1434-82.

[0086] 2. Test Results

[0087]

[0088]

[0089] Note: MD represents the radial or length direction; CD represents the transverse or width direction.

[0090] The above embodiments are only preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Any non-essential changes and substitutions made by those skilled in the art based on the present application are within the scope of protection of the present application.

Claims

1. A polypropylene decorative film for floor surface finishing, characterized in that, It consists of a polypropylene base film layer, a printing layer, a breathable and wear-resistant layer and an adhesive backing layer. The adhesive backing layer is attached to one side of the polypropylene base film layer, the printing layer is printed on the other side of the polypropylene base film layer, and the breathable and wear-resistant layer is coated on the surface of the printing layer. The polypropylene-based film layer comprises the following components in parts by weight: 85-92 parts of copolymer polypropylene, 20-30 parts of polyhedral oligomeric silsesquioxane, 5-10 parts of light calcium carbonate, 4-15 parts of color masterbatch, 1-3 parts of nano titanium dioxide, 0.2-0.5 parts of polyurethane antistatic agent, and 0.5-1.5 parts of polyethylene wax dispersant. The adhesive backing layer has grooved embossing on the surface of the release paper, and the adhesive backing layer comprises the following components in parts by weight: Acrylamide monomer SW941 20-30 parts, poly(ethylene glycol) methacrylate 5-10 parts, 2-hydroxyethyl methacrylate phosphate 5-10 parts, acrylamide monomer SW925 0.5-2 parts, nano Al2O3 particles 0.01-0.1 parts, potassium persulfate-sodium thiosulfate-copper sulfate initiator 1-5 parts, deionized water 30-50 parts; The grooved embossing has a semi-circular structure, and the diameter of the grooved embossing is 0.2-0.4 mm; The breathable and wear-resistant layer comprises the following components in parts by weight: 30-40 parts of polyether ether ketone resin, 15-25 parts of polyether block amide elastomer, 15-25 parts of polyhedral oligomeric silsesquioxane, 15-25 parts of wear-resistant filler, 4-5 parts of photoinitiator, 0.1-8 parts of matting agent, 1-3 parts of leveling agent, and 0.1-0.5 parts of defoamer. The wear-resistant filler is a wear-resistant filler treated with 3-(trimethoxysilyl)propyl methacrylate coupling agent.

2. A method for preparing a polypropylene decorative film for floor surface finishing as described in claim 1, characterized in that, The preparation steps include the following: S1: Mix the raw materials of the polypropylene base film layer according to the formula, then put them into the base film machine for heating, mixing and melting, extruding the sheet base film, and simultaneously corona discharge to obtain the polypropylene base film layer. S2: Mix the ink of the printing layer evenly, then pour it into the ink tank of the printing machine, adjust the oven temperature to 100-110℃, roll it up, adjust the printing speed, and start printing on the surface of the polypropylene base film to form the printing layer. S3: Mix the coating of the breathable wear-resistant layer evenly, homogenize it under ultrasonic vibration, and then pour it into the coating tank of the coating machine. Adjust the temperature of the coating machine to 60-120℃ and the parameters of the Excimer-UV system. After the printed film is rolled up, adjust the coating speed and start coating on the printed layer to form a breathable wear-resistant layer. S4: Mix the raw materials for the backing adhesive layer evenly, then homogenize them under ultrasonic vibration, and pour them into the adhesive tank of the coating machine. Adjust the coating machine temperature to 110-125℃, with a coating speed of 20-25m / min and a coating amount of 30-60g / m. 2 The coating is applied to the other side of the polypropylene base film layer, and then a grooving machine is used to form grooves with a diameter of 0.2-0.4mm on its surface.

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