PP floor film and preparation method thereof

Abstract

The invention discloses a PP floor film and a preparation method thereof, and relates to the technical field of film material processing, and the PP floor film is prepared from the following materials: 700-900 parts of polypropylene, 10-100 parts of a plasticizer, 20-120 parts of a stabilizer, 12-200 parts of an organic pigment, 10-200 parts of an auxiliary agent, 12-220 parts of an inorganic wear-resistant filler, 20-130 parts of a polymer wear-resistant modifier, 1-20 parts of a beta nucleating agent and 1-15 parts of an ultraviolet absorbent. Through the plasticizer and the stabilizer, the processability is optimized, oxidative degradation is inhibited, the thermal stability of the material is guaranteed, the organic pigment enriches color patterns, the beta nucleating agent improves the crystal form and enhances the toughness and gloss, the ultraviolet absorbent effectively resists light aging, and various assistants have a synergistic effect, so that the flame-retardant and antistatic functions are expanded; the floor film can meet different decoration style requirements and adapt to indoor and outdoor complex environments, the preparation process is simple, raw materials are easy to obtain, and the floor film has high performance, attractiveness and economical efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of film material processing, in particular to a PP floor film and a preparation method thereof. Background Art

[0002] Polypropylene (PP) floor membranes are widely used in interior decoration, industrial protection and other fields due to their low cost, good chemical stability and excellent processing properties. With the rapid development of the building decoration industry and the increasing demand of consumers for the quality of floor materials, the market has put forward higher standards for the comprehensive performance of PP floor membranes, requiring them to have not only good wear resistance and weather resistance, but also better color stability and flexibility. At present, traditional PP floor films have many limitations in practical applications. On the one hand, the wear resistance of existing PP floor films is insufficient. During long-term use, the surface is easily worn and scratched by external forces such as friction and trampling, affecting the aesthetics and service life. On the other hand, the weather resistance is poor. Under the influence of environmental factors such as ultraviolet rays, high temperature and high humidity, it is prone to aging, fading, deformation and other problems, which limits its application in outdoor and special environments. Some PP floor films also cannot meet the diverse market demands in terms of flexibility and color durability. In this regard, we propose a PP floor film and a preparation method thereof. Summary of the Invention

[0003] In order to solve the above technical problems, a PP floor film and a preparation method thereof are provided. This technical solution solves the above problems.

[0004] In order to achieve the above objects, the technical solution adopted by the present invention is: A PP floor film and a preparation method thereof include: a PP floor film, wherein the PP floor film is prepared from the following materials: 700-900 parts of polypropylene, 10-100 parts of a plasticizer, 20-120 parts of a stabilizer, 12-200 parts of an organic pigment, 10-200 parts of an additive, 12-220 parts of an inorganic wear-resistant filler, 20-130 parts of a polymer wear-resistant modifier, 1-20 parts of a β-nucleating agent, and 1-15 parts of a UV absorber.

[0005] Preferably, the polypropylene is one of homopolypropylene and copolymer polypropylene, and the plasticizer is one of phthalate esters, aliphatic dibasic acid esters, phosphate esters and epoxy plasticizers.

[0006] Preferably, the stabilizer is one of an inorganic stabilizer, an organic stabilizer and a polymer stabilizer, the organic pigment includes phthalocyanine pigment, quinacridone pigment and isoindolinone pigment, and the auxiliary agent includes a heat stabilizer, a light stabilizer, a flame retardant and an antibacterial agent.

[0007] Preferably, the inorganic wear-resistant filler includes nano-silicon dioxide and micron-sized aluminum oxide, and the polymer wear-resistant modifier includes polyethylene wax, polypropylene wax and thermoplastic polyurethane elastomer.

[0008] Preferably, the UV absorber is one of benzophenone and benzotriazole, and the β-nucleating agent includes organic compound, inorganic non-metal and composite β-nucleating agents.

[0009] A method for preparing a PP floor film, comprising the following steps: S1. Prepare materials, including: 700 parts of polypropylene, 15 parts of plasticizer, 22 parts of stabilizer, 50 parts of organic pigment, 10 parts of additive, 120 parts of inorganic wear-resistant filler, 70 parts of polymer wear-resistant modifier, 7 parts of β-nucleating agent and 4 parts of UV absorber; S2. Dry the polypropylene at 80-90°C for 2-4 hours, and dry the inorganic wear-resistant filler at 110-120°C for 4-6 hours until constant weight is reached. S3, adding the dried polypropylene and inorganic wear-resistant filler into a high-speed mixer and mixing them at a speed of 500-900 rpm; adding plasticizer, stabilizer, organic pigment and additives in sequence during the stirring process, and stirring for 5-30 minutes; S4, secondary mixing, adding β nucleating agent and ultraviolet absorber and continuing stirring for 15 minutes to obtain a mixed material; S5. Use a twin-screw extruder for granulation. Set the parameters and add the mixed material into the twin-screw extruder. After the material is melted, mixed and extruded, it is granulated by underwater pelletizing. The pellets are screened to remove sticky particles and impurities. S6. Using a single-screw extruder, extrude the pellets into shape, adjust the parameters of the single-screw extruder, add the pelletized material into the single-screw extruder, melt the material and extrude it through a T-die, cast the melt onto a cooling roller, cool and shape it, and draw the film material out through a traction machine to produce a PP floor film; S7. Heat-treat the formed PP floor film at 100-120° C. for 10-30 minutes, and then perform corona treatment. After the corona treatment, cut the film according to the cutting specifications. S8. Carry out quality inspection on the cut PP floor film, including appearance inspection, performance inspection, wear resistance inspection and weather resistance inspection. After passing the inspection, the PP floor film will be rolled into rolls, packaged and put into storage.

[0010] Preferably, in step S2, the polypropylene is placed in a hot air circulation drying oven at 80-90° C. During the drying process, the hot air circulates through the material layer at a wind speed of 0.5-1 m / s to evaporate the moisture; Place the inorganic wear-resistant filler in a vacuum drying oven at 110-120°C for 4-6 hours until constant weight is reached, i.e. the difference between two consecutive weighings does not exceed 0.002g. During the drying process, spread the filler flat on a stainless steel tray with a thickness of 3-5cm for full drying.

[0011] Preferably, in step S3, after stirring in a high-speed mixer for 3 minutes, a stabilizer is added to the high-speed mixer, a plasticizer is added to the high-speed mixer after stirring for 5 minutes, an auxiliary agent is added to the high-speed mixer after stirring for 8 minutes, and an organic pigment is added for coloring during the last 5 minutes of stirring.

[0012] Preferably, the corona treatment step in step S7 is: The heat-treated PP floor film is fed into the corona treatment equipment, the voltage is controlled at 15-25kV, the frequency is set at 10-20kHz, and the film is passed through the electrode gap at a constant speed of 3-5m / min; Observe the corona treatment area for sparking or arcing abnormalities; After the corona treatment is completed, let the film stand for 5-15 minutes and wait for cutting.

[0013] Preferably, in step S8, the appearance inspection is performed by visual inspection, the performance inspection is a tensile performance inspection, and the weather resistance inspection is performed by a xenon lamp aging test.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention adopts a scientific formula, uses polypropylene as the base material, and is combined with inorganic wear-resistant fillers and polymer wear-resistant modifiers to greatly improve the hardness and wear resistance, and the service life exceeds that of traditional films by 30%. Plasticizers and stabilizers optimize processing performance, inhibit oxidative degradation, and ensure the thermal stability of the material. Organic pigments enrich color patterns, β-nucleating agents improve crystal morphology, enhance toughness and gloss, UV absorbers effectively resist light aging, and various additives work synergistically to expand flame retardant and antistatic functions. This floor film can not only meet the needs of different decoration styles and adapt to complex indoor and outdoor environments, but also has a simple preparation process, easily available raw materials, and combines high performance, aesthetics and economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure is a flow chart of the preparation steps of the PP floor film of the present invention. DETAILED DESCRIPTION

[0016] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0017] A PP floor film is prepared from the following materials: 700-900 parts of polypropylene, 10-100 parts of plasticizer, 20-120 parts of stabilizer, 12-200 parts of organic pigment, 10-200 parts of additive, 12-220 parts of inorganic wear-resistant filler, 20-130 parts of polymer wear-resistant modifier, 1-20 parts of β-nucleating agent and 1-15 parts of ultraviolet absorber.

[0018] It uses polypropylene as the base material, combined with inorganic wear-resistant fillers and polymer wear-resistant modifiers, which greatly improves the hardness and wear resistance, and its service life exceeds that of traditional films by 30%. Plasticizers and stabilizers optimize processing performance, inhibit oxidative degradation, and ensure the thermal stability of the material. Organic pigments enrich the color pattern, β-nucleating agents improve the crystal morphology, enhance toughness and gloss, UV absorbers effectively resist light aging, and various additives work synergistically to expand the flame retardant and antistatic functions.

[0019] The polypropylene is one of homopolymer polypropylene and copolymer polypropylene, and the plasticizer is one of phthalate esters, aliphatic dibasic acid esters, phosphate esters and epoxy plasticizers.

[0020] This application clarifies that polypropylene is one of homopolymer polypropylene and copolymer polypropylene, as well as the type of plasticizer, which brings significant advantages to PP floor film. Homopolymer polypropylene has the characteristics of high crystallinity, strong rigidity and high hardness. It is used in PP floor film to give it excellent wear resistance and dimensional stability, which is suitable for scenes with high hardness requirements; copolymer polypropylene has good flexibility, impact resistance and low-temperature performance due to the introduction of other monomers in the molecular chain, which can improve the adaptability of floor film in complex environments. The plasticizer is limited to one of phthalate esters, aliphatic dibasic acid esters, phosphate esters and epoxy plasticizers, which can accurately control the material properties. Phthalate ester plasticizers have good compatibility and high plasticizing efficiency, can effectively reduce the melt viscosity of polypropylene, and improve processing performance; aliphatic dibasic acid ester plasticizers give the product good low-temperature performance; phosphate ester plasticizers have both plasticizing and flame retardant functions; epoxy plasticizers have excellent thermal stability and weather resistance.

[0021] The stabilizer is one of an inorganic stabilizer, an organic stabilizer and a polymer stabilizer. The organic pigment includes a phthalocyanine pigment, a quinacridone pigment and an isoindolinone pigment. The auxiliary agent includes a heat stabilizer, a light stabilizer, a flame retardant and an antibacterial agent.

[0022] This application constructs a dual protection mechanism. The heat stabilizer inhibits thermal oxidation during the processing stage, and the light stabilizer absorbs ultraviolet energy to delay light aging during use, so that the floor film maintains stable performance in a temperature range of -20℃~80℃ and a strong ultraviolet environment.

[0023] Inorganic wear-resistant fillers include nano-silicon dioxide and micron-sized alumina, and polymer wear-resistant modifiers include polyethylene wax, polypropylene wax and thermoplastic polyurethane elastomer.

[0024] The ultraviolet absorber is one of benzophenone and benzotriazole, and the beta nucleating agent includes organic compound, inorganic non-metal and composite beta nucleating agents. Example 1

[0025] Reference Figure 1 As shown, a method for preparing a PP floor film, the preparation steps are: S1. Prepare materials, including: 700 parts of polypropylene, 15 parts of plasticizer, 22 parts of stabilizer, 50 parts of organic pigment, 10 parts of additive, 120 parts of inorganic wear-resistant filler, 70 parts of polymer wear-resistant modifier, 7 parts of β-nucleating agent and 4 parts of UV absorber; S2. Dry the polypropylene at 90°C for 3 hours and dry the inorganic wear-resistant filler at 110°C for 5 hours to constant weight. S3, adding the dried polypropylene and inorganic wear-resistant filler into a high-speed mixer and mixing them at a speed of 900 rpm; adding plasticizer, stabilizer, organic pigment and additive in sequence during the stirring process, and stirring for 15 minutes; S4, secondary mixing, adding β nucleating agent and ultraviolet absorber and continuing stirring for 15 minutes to obtain a mixed material; S5. Use a twin-screw extruder for granulation. Set the parameters and add the mixed material into the twin-screw extruder. After the material is melted, mixed and extruded, it is granulated by underwater pelletizing. The pellets are screened to remove sticky particles and impurities. S6. Using a single-screw extruder, extrude the pellets into shape, adjust the parameters of the single-screw extruder, add the pelletized material into the single-screw extruder, melt the material and extrude it through a T-die, cast the melt onto a cooling roller, cool and shape it, and draw the film material out through a traction machine to produce a PP floor film; S7, heat-treating the formed PP floor film at 110° C. for 15 minutes, and then performing corona treatment; after the corona treatment, cutting the film according to the cutting specifications; S8. Carry out quality inspection on the cut PP floor film, including appearance inspection, performance inspection, wear resistance inspection and weather resistance inspection. After passing the inspection, the PP floor film will be rolled into rolls, packaged and put into storage.

[0026] This application precisely controls the drying temperature and duration of polypropylene and inorganic wear-resistant fillers, effectively removing moisture and impurities and avoiding problems such as bubbles and surface defects during the molding process, laying the foundation for high-quality membrane materials. During the mixing step, various additives are added step by step. First, the polypropylene and inorganic wear-resistant fillers are fully mixed to form a skeleton, and then other ingredients are added in sequence to ensure that the plasticizer and pigment are evenly dispersed, improving the uniformity of the material. The secondary mixing of the β-nucleating agent and the UV absorber ensures that they fully exert their modifying and protective effects in the system, thereby enhancing the toughness and weather resistance of the floor membrane. The combination of twin-screw extruder pelletizing and single-screw extrusion molding utilizes the twin-screw's strong mixing capacity to achieve full melting and dispersion of the material, and underwater pelletizing ensures uniform pellet size. The single-screw extruder, combined with a T-die and cast cooling process, precisely controls film thickness and surface flatness to meet the needs of different application scenarios. Heat treatment and corona treatment further optimize film performance. Heat treatment eliminates internal stress and improves dimensional stability, while corona treatment increases surface activity, facilitating subsequent processing such as printing and coating. A rigorous quality inspection system encompasses appearance, performance, wear resistance, and weather resistance, ensuring product compliance with high standards and minimizing post-sale risks. This systematic production approach not only improves production efficiency and reduces defective product rates, but also ensures that the PP floor film possesses excellent wear resistance, aesthetics, and durability, making it highly competitive in the market for architectural decoration, commercial spaces, and other fields.

[0027] In step S2, the polypropylene is placed in a hot air circulation drying oven at 80-90°C. During the drying process, the hot air circulates through the material layer at a wind speed of 0.5-1m / s to evaporate the moisture; Place the inorganic wear-resistant filler in a vacuum drying oven at 110-120°C for 4-6 hours until constant weight is reached, i.e. the difference between two consecutive weighings does not exceed 0.002g. During the drying process, spread the filler flat on a stainless steel tray with a thickness of 3-5cm for full drying.

[0028] In step S3, after stirring in a high-speed mixer for 3 minutes, a stabilizer is added to the high-speed mixer, a plasticizer is added to the high-speed mixer after stirring for 5 minutes, an auxiliary agent is added to the high-speed mixer after stirring for 8 minutes, and an organic pigment is added for coloring during the last 5 minutes of stirring.

[0029] The corona treatment steps in step S7 are: The heat-treated PP floor film is fed into the corona treatment equipment, the voltage is controlled at 15-25kV, the frequency is set at 10-20kHz, and the film is passed through the electrode gap at a constant speed of 3-5m / min; Observe the corona treatment area for sparking or arcing abnormalities; After the corona treatment is completed, let the film stand for 5-15 minutes and wait for cutting.

[0030] In step S8, the appearance inspection is performed by visual inspection, the performance inspection is a tensile performance inspection, and the weather resistance inspection is performed by a xenon lamp aging test. Example 2

[0031] A method for preparing a PP floor film, comprising the following steps: S1. Prepare materials, including: 800 parts of polypropylene, 10 parts of plasticizer, 25 parts of stabilizer, 60 parts of organic pigment, 15 parts of additive, 20 parts of inorganic wear-resistant filler, 80 parts of polymer wear-resistant modifier, 14 parts of β-nucleating agent and 13 parts of UV absorber; S2. Dry the polypropylene at 80-90°C for 2 hours, and dry the inorganic wear-resistant filler at 110-120°C for 4 hours until constant weight is reached. S3, adding the dried polypropylene and inorganic wear-resistant filler into a high-speed mixer and mixing them at a speed of 500 rpm; adding plasticizer, stabilizer, organic pigment and additive in sequence during the stirring process, and stirring for 15 minutes; S4, secondary mixing, adding β nucleating agent and ultraviolet absorber and continuing stirring for 15 minutes to obtain a mixed material; S5. Use a twin-screw extruder for granulation. Set the parameters and add the mixed material into the twin-screw extruder. After the material is melted, mixed and extruded, it is granulated by underwater pelletizing. The pellets are screened to remove sticky particles and impurities. S6. Using a single-screw extruder, extrude the pellets into shape, adjust the parameters of the single-screw extruder, add the pelletized material into the single-screw extruder, melt the material and extrude it through a T-die, cast the melt onto a cooling roller, cool and shape it, and draw the film material out through a traction machine to produce a PP floor film; S7, heat-treating the formed PP floor film at 100° C. for 15 minutes, and then performing a corona treatment; after the corona treatment, cutting the film according to the cutting specifications; S8. Carry out quality inspection on the cut PP floor film, including appearance inspection, performance inspection, wear resistance inspection and weather resistance inspection. After passing the inspection, the PP floor film will be rolled into rolls, packaged and put into storage.

[0032] Specific test process steps Obtain samples prepared in Example 1 and Example 2. Lay the cut PP floor film flat on a flat surface under natural light or standard light source. Visually inspect the film surface at a distance of 30-50 cm to check for scratches, bubbles, color difference, and impurity defects. Use a steel ruler to measure the film dimensions to check whether its length, width, and thickness meet the design specifications. The allowable error range must be strictly controlled within the standard tolerance. Tensile Properties Test: Dumbbell-shaped specimens were cut from the PP floor films of Examples 1 and 2 and mounted on an electronic universal material testing machine at a tensile speed of 50 mm / min. The tensile strength and elongation at break were tested. The tensile strength was to exceed the specified standard value, and the elongation at break was to remain within a reasonable range to ensure the floor films possessed good flexibility and tensile strength. The test was conducted using a Taber abrasion tester based on ASTM D4060. The cut PP floor film was fixed to the tester's turntable. The abrasion wheel was selected, the load was set to 1000g, the turntable speed was set to 60r / min, and the number of tests was set to 1000r. After the test, the mass loss of the sample before and after abrasion was measured using an electronic balance with an accuracy of 0.001g. The smaller the mass loss, the better the abrasion resistance of the PP floor film. Abrasion resistance can also be evaluated by observing the change in glossiness of the film surface after abrasion and whether there are obvious wear marks. Xenon lamp aging test: Referring to GB / T 16422.2-2014 standard, the sample is placed in a xenon lamp aging test chamber to simulate natural sunlight, rain, and humidity environmental factors. The irradiance is set at 550W / ㎡, the blackboard temperature is 65℃, the relative humidity is 65%, and the test period is 500h. After the test, the performance data and appearance of the sample before and after aging are compared to determine whether the weather resistance of the PP floor film meets the standard.

[0033] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. Various changes and improvements are possible without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the invention as claimed.

Claims

1. A PP floor film, characterized in that: The PP floor film is made of the following materials: 700-900 parts of polypropylene, 10-100 parts of plasticizer, 20-120 parts of stabilizer, 12-200 parts of organic pigment, 10-200 parts of additive, 12-220 parts of inorganic wear-resistant filler, 20-130 parts of polymer wear-resistant modifier, 1-20 parts of β-nucleating agent and 1-15 parts of UV absorber.

2. A PP floor film according to claim 1, characterized in that: The polypropylene is one of homopolymer polypropylene and copolymer polypropylene, and the plasticizer is one of phthalate esters, aliphatic dibasic acid esters, phosphate esters and epoxy plasticizers.

3. The PP floor film according to claim 1, characterized in that: The stabilizer is one of an inorganic stabilizer, an organic stabilizer and a polymer stabilizer. The organic pigment includes a phthalocyanine pigment, a quinacridone pigment and an isoindolinone pigment. The auxiliary agent includes a heat stabilizer, a light stabilizer, a flame retardant and an antibacterial agent.

4. The PP floor film according to claim 1, characterized in that: Inorganic wear-resistant fillers include nano-silicon dioxide and micron-sized alumina, and polymer wear-resistant modifiers include polyethylene wax, polypropylene wax and thermoplastic polyurethane elastomer.

5. The PP floor film according to claim 1, characterized in that: The ultraviolet absorber is one of benzophenone and benzotriazole, and the beta nucleating agent includes organic compound, inorganic non-metal and composite beta nucleating agents.

6. A method for preparing a PP floor film, characterized in that: The preparation steps are: S1. Prepare materials, including: 700 parts of polypropylene, 15 parts of plasticizer, 22 parts of stabilizer, 50 parts of organic pigment, 10 parts of additive, 120 parts of inorganic wear-resistant filler, 70 parts of polymer wear-resistant modifier, 7 parts of β-nucleating agent and 4 parts of UV absorber; S2. Dry the polypropylene at 80-90°C for 2-4 hours, and dry the inorganic wear-resistant filler at 110-120°C for 4-6 hours until constant weight is reached. S3, adding the dried polypropylene and inorganic wear-resistant filler into a high-speed mixer and mixing them at a speed of 500-900 rpm; adding plasticizer, stabilizer, organic pigment and additives in sequence during the stirring process, and stirring for 5-30 minutes; S4, secondary mixing, adding β nucleating agent and ultraviolet absorber and continuing stirring for 15 minutes to obtain a mixed material; S5. Use a twin-screw extruder for granulation. Set the parameters and add the mixed material into the twin-screw extruder. After the material is melted, mixed and extruded, it is granulated by underwater pelletizing. The pellets are screened to remove sticky particles and impurities. S6. Using a single-screw extruder, extrude the pellets into shape, adjust the parameters of the single-screw extruder, add the pelletized material into the single-screw extruder, melt the material and extrude it through a T-die, cast the melt onto a cooling roller, cool and shape it, and draw the film material out through a traction machine to produce a PP floor film; S7. Heat-treat the formed PP floor film at 100-120° C. for 10-30 minutes, and then perform corona treatment. After the corona treatment, cut the film according to the cutting specifications. S8. Carry out quality inspection on the cut PP floor film, including appearance inspection, performance inspection, wear resistance inspection and weather resistance inspection. After passing the inspection, the PP floor film will be rolled into rolls, packaged and put into storage.

7. The method for preparing a PP floor film according to claim 1, characterized in that: In step S2, the polypropylene is placed in a hot air circulation drying oven at 80-90°C. During the drying process, the hot air circulates through the material layer at a wind speed of 0.5-1m / s to evaporate the moisture; Place the inorganic wear-resistant filler in a vacuum drying oven at 110-120°C for 4-6 hours until constant weight is reached, i.e. the difference between two consecutive weighings does not exceed 0.002g. During the drying process, spread the filler flat on a stainless steel tray with a thickness of 3-5cm for full drying.

8. The method for preparing a PP floor film according to claim 1, characterized in that: In step S3, after stirring in a high-speed mixer for 3 minutes, a stabilizer is added to the high-speed mixer, a plasticizer is added to the high-speed mixer after stirring for 5 minutes, an auxiliary agent is added to the high-speed mixer after stirring for 8 minutes, and an organic pigment is added for coloring during the last 5 minutes of stirring.

9. The method for preparing a PP floor film according to claim 1, characterized in that: The corona treatment steps in step S7 are: The heat-treated PP floor film is fed into the corona treatment equipment, the voltage is controlled at 15-25kV, the frequency is set at 10-20kHz, and the film is passed through the electrode gap at a constant speed of 3-5m / min; Observe the corona treatment area for sparking or arcing abnormalities; After the corona treatment is completed, let the film stand for 5-15 minutes and wait for cutting.

10. The method for preparing a PP floor film according to claim 1, characterized in that: In step S8, the appearance inspection is performed by visual inspection, the performance inspection is a tensile performance inspection, and the weather resistance inspection is performed by a xenon lamp aging test.

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