Bathtub skirt multifunctional plate and preparation method thereof

Abstract

The invention provides a bathtub skirt multifunctional plate and a preparation method thereof, the bathtub skirt multifunctional plate comprises an inner shell layer, an outer shell layer and a heat preservation layer located between the inner shell layer and the outer shell layer, and a decoration layer is arranged on the side, away from the heat preservation layer, of the outer shell layer; the inner shell layer and the outer shell layer are prepared from the following raw materials in parts by weight: 60-80 parts of polystyrene, 1-5 parts of a plasticizer, 3-8 parts of a water repellent agent, 1-3 parts of an antioxidant, 0.1-1 part of a lubricant and 15-25 parts of antibacterial master batch; the antibacterial master batch comprises the following components in parts by weight: 5-15 parts of an antibacterial agent, 1-3 parts of an inorganic slow-release silver solution and 70-85 parts of resin. The heat preservation layer is a regenerated polystyrene foaming layer. Polystyrene is used as a main material, the bathtub can be endowed with high strength and scratch resistance, the plate is of a three-layer structure, the shell layer is further provided with the decoration layer, the attractiveness and decoration performance of the plate can be improved, and the middle layer is the regenerated polystyrene foaming layer, so that the plate has excellent heat preservation performance.

Description

Technical Field

[0001] The invention relates to the technical field of polymer materials, and in particular to a multifunctional plate material for a bathtub skirt and a preparation method thereof. Background Art

[0002] The bathtub is the main equipment in the bathroom. When taking a bath, the user can lie in it, and the water can warm the whole body. It can be used for bathing and resting. With the development of the times, the materials used to make bathtubs are constantly changing. Wooden bathtubs, ceramic bathtubs, artificial marble bathtubs, and acrylic bathtubs have appeared, and the manufacturing process of the products has also changed accordingly. Among them, wooden bathtubs have high requirements for moisture-proof, anti-corrosion and anti-leakage treatment; ceramic bathtubs are relatively bulky, and relatively difficult to transport and install; artificial marble bathtubs and acrylic bathtubs have poor scratch resistance, the surface is easily scratched, and the practicality is poor; at the same time, the above bathtubs generally have poor thermal insulation. In order to ensure the overall beauty of the bathtub, a bathtub skirt is usually set on the outside of the bathtub. The bathtub skirt can effectively cover the parts at the bottom of the bathtub and improve the simplicity and beauty of the bathtub.

[0003] Polystyrene (PS for short) is a colorless and transparent thermoplastic, of which expanded polystyrene is commonly known as styrofoam (also known as polyamide). The structural formula of polystyrene is a linear structure, but there are huge phenyl groups with continuous intervals on the carbon atoms of the molecular chain. This structure determines the special properties of polystyrene. Polystyrene is rigid and has good wear and scratch resistance. It also has good molding performance and water resistance. Within the operating temperature range, the finished product has small shrinkage and deformation and stable dimensions. In addition, expanded polystyrene has the advantages of low relative density (1.05g / cm3), low thermal conductivity, low water absorption, impact and vibration resistance, heat insulation, sound insulation, moisture resistance, vibration reduction, and excellent dielectric properties. It is used in bathtub panels to promote the thermal insulation of bathtubs. As the problem of waste plastic pollution has gradually received attention, the recycling and resource utilization of waste plastics has become a global focus. Polystyrene foam is widely used in disposable packaging industries such as product shock-absorbing and anti-collision packaging, food preservation packaging, etc. However, it is discarded at will due to its low density and low cost, causing serious environmental pollution, especially marine plastic pollution. Therefore, the rational use of recycled polystyrene is of great significance to sustainable development.

[0004] Therefore, a multifunctional bathtub skirt board is proposed, which has multiple functions of beautiful decoration, long-term heat preservation and antibacterial properties. Summary of the invention

[0005] The purpose of the present invention is to provide a multifunctional board material for a bathtub skirt and a preparation method thereof, which takes polystyrene as the main material and is combined with recycled polystyrene to form a multi-layered board material having the trinity effect of aesthetics, heat preservation and antibacterial properties.

[0006] To achieve the above-mentioned purpose, the present invention provides a bathtub skirt multifunctional board material, the bathtub skirt multifunctional board material comprises an inner shell layer, an outer shell layer and an insulation layer located between the inner shell layer and the outer shell layer, and the outer shell layer is provided with a decorative layer on the side away from the insulation layer. The inner shell layer and the outer shell layer comprise the following raw materials in parts by weight: 60-80 parts of polystyrene, 1-5 parts of plasticizer, 3-8 parts of hydrophobic agent, 1-3 parts of antioxidant, 0.1-1 parts of lubricant and 15-25 parts of antibacterial masterbatch. The antibacterial masterbatch comprises the following components in parts by weight: 5-15 parts of antibacterial agent, 1-3 parts of inorganic slow-release silver solution and 70-85 parts of resin. The insulation layer is a recycled polystyrene foaming layer, and the recycled polystyrene foaming layer comprises the following components in parts by weight: 60-70 parts of recycled polystyrene, 10-20 parts of recycled polyethylene, 5-15 parts of styrene-butadiene-styrene block copolymer, 4-10 parts of AC foaming agent and 3-8 parts of epoxy soybean oil.

[0007] Preferably, the decorative layer is formed by hot pressing an elastic protective film with a pattern.

[0008] Preferably, the patterned elastomeric protective film is composed of a patterned film and an elastomeric base film.

[0009] Preferably, the elastomeric base film is a thermoplastic polyurethane base film.

[0010] Preferably, the polystyrene in the raw materials of the inner shell layer and the outer shell layer is high impact polystyrene; the plasticizer is one or more of pentaerythritol, dibutyl sebacate, and diisononyl phthalate; the hydrophobic agent is one or a combination of polymethyl methacrylate and n-hexadecane; the antioxidant is one of antioxidant 1076 or antioxidant 168; the lubricant is one or more of paraffin, stearic acid, butyl stearate, oleamide or ethylene bisstearamide.

[0011] Preferably, the antibacterial agent in the antibacterial masterbatch is one or a mixture of 2-methyl-4-isothiazoline-3-one, 5-chloro-2-methyl-4-isothiazoline-3-one, 4,5-dichloro-2-n-octyl-4-isothiazoline-3-one; the inorganic sustained-release silver solution is one or a mixture of silver nitrate solution, silver acetate solution, and silver citrate solution; the resin is one or a mixture of polypropylene, polyethylene, and EVA.

[0012] The present invention also provides a method for preparing a bathtub skirt multifunctional plate, comprising the following steps: Step 1, preparing a polystyrene blend: adding the polystyrene, plasticizer, hydrophobic agent, antioxidant, lubricant and antibacterial masterbatch into a mixer according to a proportion and mixing them evenly to obtain a mixture for a shell layer, the stirring speed is 600 r / min, and the mixing time is 2-10 min;

[0013] Step 2, preparing a recycled polystyrene blend: mixing recycled polystyrene and recycled polyethylene according to a ratio, mixing them evenly in a high-speed mixer, and then melting, extruding, and granulating them through a twin-screw extruder to obtain first plastic particles; mixing the first plastic particles with styrene-butadiene-styrene block copolymer, mixing them evenly in a high-speed mixer, and then melting, extruding, and granulating them through a twin-screw extruder to obtain second plastic particles; mixing the second plastic particles with AC foaming agent and epoxy soybean oil, and mixing them evenly in a high-speed mixer to obtain a mixture for a foaming layer;

[0014] Step 3, preparing a sheet substrate: the shell layer mixture is evenly divided and added to the first extruder and the second extruder, and the foaming layer mixture is added to the third extruder, and a sheet substrate with a foaming layer in the middle and an outer shell layer and an inner shell layer on both sides is obtained by melt co-extrusion and cooling and shaping;

[0015] Step 4: preparing the decorative layer: hot pressing the patterned elastomeric protective film onto the outer shell layer, and then using an embossing roller to press the patterned elastomeric protective film to form three-dimensional patterns to obtain the bathtub skirt multifunctional sheet material.

[0016] Preferably, the preparation method of the antibacterial masterbatch is to add the inorganic slow-release silver solution to the resin and stir and mix thoroughly, then add the antibacterial agent, mix thoroughly to obtain an antibacterial mixture, and granulate the antibacterial mixture through a twin-screw extruder to obtain an antibacterial masterbatch antibacterial agent.

[0017] Preferably, in step three, the first extruder melts and plasticizes the mixture for the shell layer at 220-250°C, and extrude it into the first layer flow channel of the distributor; the second extruder melts and plasticizes the mixture for the shell layer at 220-250°C, and extrude it into the second layer flow channel of the distributor; the third extruder melts the mixture for the foaming layer at 220-250°C, and extrude it into the third layer flow channel of the distributor; the first layer flow channel, the second layer flow channel and the third layer flow channel are connected to a three-layer co-extrusion head, the upper and lower layers of the three-layer co-extrusion head are respectively connected to the first layer flow channel and the second layer flow channel, and the middle layer of the three-layer co-extrusion head is connected to the third layer flow channel.

[0018] Beneficial effects of the present invention: The present invention provides a multifunctional sheet material for a bathtub skirt, which uses polystyrene as the main material, and can give the bathtub higher strength and scratch resistance. The sheet material is provided with a three-layer structure, and the outer shell layer is further provided with a decorative layer, which can improve the aesthetic decorativeness of the sheet material, and the middle layer is a recycled polystyrene foam layer. The sheet material has excellent thermal insulation performance, which overcomes the problem that the weight of the bathtub in the prior art is generally high and the thermal insulation performance is generally poor, and the use time of the bathtub is increased, which can provide users with a better bathing experience; and the material used for the middle thermal insulation layer is mainly recycled polystyrene, which realizes the recycling of waste plastics; antibacterial masterbatch is added to the inner shell layer and the outer shell layer material, which can improve the antibacterial effect of the bathtub sheet material, give the bathtub lasting antibacterial performance, and better adapt to the hot and humid environment of the bathroom. The present invention also proposes a method for preparing a multifunctional sheet material for a bathtub skirt, which is simple and convenient, and adopts a co-extrusion process to form an integrated sheet substrate, and the molding process is simple, the size is stable, it is not easy to produce scratches, and it is easy to mass produce. DETAILED DESCRIPTION

[0019] The embodiments described below are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The present invention provides a bathtub skirt multifunctional board material, the bathtub skirt multifunctional board material comprises an inner shell layer, an outer shell layer and an insulation layer between the inner shell layer and the outer shell layer, and the outer shell layer is provided with a decorative layer on a side away from the insulation layer. The inner shell layer and the outer shell layer comprise the following raw materials in parts by weight: 60-80 parts of polystyrene, 1-5 parts of plasticizer, 3-8 parts of hydrophobic agent, 1-3 parts of antioxidant, 0.1-1 parts of lubricant and 15-25 parts of antibacterial masterbatch. The antibacterial masterbatch comprises the following components in parts by weight: 5-15 parts of antibacterial agent, 1-3 parts of inorganic slow-release silver solution and 70-85 parts of resin. The insulation layer is a recycled polystyrene foaming layer, and the recycled polystyrene foaming layer comprises the following components in parts by weight: 60-70 parts of recycled polystyrene, 10-20 parts of recycled polyethylene, 5-15 parts of styrene-butadiene-styrene block copolymer, 4-10 parts of foaming agent and 3-8 parts of epoxy soybean oil. Recycled polystyrene has low impact strength, poor environmental stress cracking resistance and solvent resistance. Appropriate addition of recycled polyethylene blending can improve the comprehensive performance of the material. However, since recycled polystyrene and recycled polyethylene are incompatible systems, it is necessary to add a compatibilizer to improve the compatibility of the blend. Styrene-butadiene-styrene block copolymer is a good toughening agent, compatibilizer, and nucleating agent for the blend system of recycled polystyrene and recycled polyethylene, forming a more stable foaming material. The thickness ratio of the inner shell layer, outer shell layer and thermal insulation layer includes but is not limited to 1:1:1 or 0.8:1:0.8 or 0.8:1.2:0.8 or 1:1.5:1.

[0021] Wherein, the decorative layer is formed by hot pressing an elastic protective film with patterns.

[0022] The patterned elastic protective film is composed of a patterned film and an elastic base film. By setting a double-layer film, after the patterned elastic protective film is laminated on the outer shell layer, an embossing roller can be used to emboss certain patterns to make the decorative layer more beautiful.

[0023] The elastomer base film is a thermoplastic polyurethane base film.

[0024] The polystyrene in the raw materials of the inner shell layer and the outer shell layer is high-impact polystyrene; the plasticizer is one or more of pentaerythritol, dibutyl sebacate, and diisononyl phthalate; the hydrophobic agent is one or a combination of polymethyl methacrylate and n-hexadecane; the antioxidant is one of antioxidant 1076 or antioxidant 168; and the lubricant is one or more of paraffin, stearic acid, butyl stearate, oleamide, or ethylene bisstearamide.

[0025] The antibacterial agent in the antibacterial masterbatch is one or a mixture of 2-methyl-4-isothiazoline-3-one, 5-chloro-2-methyl-4-isothiazoline-3-one, 4,5-dichloro-2-n-octyl-4-isothiazoline-3-one; the inorganic sustained-release silver solution is one or a mixture of silver nitrate solution, silver acetate solution, and silver citrate solution; and the resin is one or a mixture of polypropylene, polyethylene, and EVA.

[0026] The present invention also provides a method for preparing a bathtub skirt multifunctional plate, comprising the following steps:

[0027] Step 1, preparing a polystyrene blend: adding the polystyrene, plasticizer, hydrophobic agent, antioxidant, lubricant and antibacterial masterbatch into a mixer according to a proportion and mixing them evenly to obtain a mixture for a shell layer, with a stirring speed of 600 r / min and a mixing time of 2-10 min;

[0028] Step 2, preparing a recycled polystyrene blend: mixing recycled polystyrene and recycled polyethylene according to a ratio, mixing them evenly in a high-speed mixer, and then melting, extruding, and granulating them through a twin-screw extruder to obtain first plastic particles; mixing the first plastic particles with styrene-butadiene-styrene block copolymer, mixing them evenly in a high-speed mixer, and then melting, extruding, and granulating them through a twin-screw extruder to obtain second plastic particles; mixing the second plastic particles with AC foaming agent and epoxy soybean oil, and mixing them evenly in a high-speed mixer to obtain a mixture for a foaming layer;

[0029] Step 3, preparing a sheet substrate: the shell layer mixture is evenly divided and added to the first extruder and the second extruder, and the foaming layer mixture is added to the third extruder, and a sheet substrate with a foaming layer in the middle and an outer shell layer and an inner shell layer on both sides is obtained by melt co-extrusion and cooling and shaping;

[0030] Step 4: preparing the decorative layer: hot pressing the patterned elastomeric protective film onto the outer shell layer, and then using an embossing roller to press the patterned elastomeric protective film to form three-dimensional patterns to obtain the bathtub skirt multifunctional sheet material.

[0031] The preparation method of the antibacterial masterbatch is as follows: adding the inorganic sustained-release silver solution to the resin and stirring and mixing it thoroughly, then adding the antibacterial agent, mixing it thoroughly to obtain an antibacterial mixture, and granulating the antibacterial mixture through a twin-screw extruder to obtain an antibacterial masterbatch antibacterial agent.

[0032] In step three, the first extruder melts and plasticizes the mixture for the shell layer at 220-250°C, and squeezes it into the first layer flow channel of the distributor; the second extruder melts and plasticizes the mixture for the shell layer at 220-250°C, and squeezes it into the second layer flow channel of the distributor; the third extruder melts the mixture for the foaming layer at 220-250°C, and squeezes it into the third layer flow channel of the distributor; the first layer flow channel, the second layer flow channel and the third layer flow channel are connected to a three-layer co-extrusion head, the upper and lower layers of the three-layer co-extrusion head are respectively connected to the first layer flow channel and the second layer flow channel, and the middle layer of the three-layer co-extrusion head is connected to the third layer flow channel.

[0033] Example 1

[0034] This embodiment provides a bathtub skirt multifunctional sheet material, the bathtub skirt multifunctional sheet material comprises an inner shell layer, an outer shell layer and an insulation layer located between the inner shell layer and the outer shell layer, and the outer shell layer is provided with a decorative layer on the side away from the insulation layer. The inner shell layer and the outer shell layer comprise the following raw materials in parts by weight: 70 parts of high-impact polystyrene, 3 parts of dibutyl sebacate, 5 parts of polymethyl methacrylate, 1682 parts of antioxidant, 1 part of paraffin and 20 parts of antibacterial masterbatch. The antibacterial masterbatch comprises the following components in parts by weight: 10 parts of 4,5-dichloro-2-n-octyl-4-isothiazoline-3-one, 3 parts of silver acetate solution and 80 parts of polypropylene. The insulation layer is a recycled polystyrene foaming layer, and the recycled polystyrene foaming layer comprises the following components in parts by weight: 65 parts of recycled polystyrene, 15 parts of recycled polyethylene, 10 parts of styrene-butadiene-styrene block copolymer, 6 parts of AC foaming agent and 6 parts of epoxy soybean oil.

[0035] The preparation method of the bathtub skirt multifunctional plate is as follows: Step 1, preparing a polystyrene blend: adding the high-impact polystyrene, dibutyl sebacate, polymethyl methacrylate, antioxidant 168, paraffin wax and antibacterial masterbatch into a mixer according to a proportion and mixing them evenly to obtain a mixture for a shell layer, the stirring speed is 600 r / min, and the mixing time is 2-10 min;

[0036] Step 2, preparing a recycled polystyrene blend: mixing recycled polystyrene and recycled polyethylene according to a ratio, mixing them evenly in a high-speed mixer, and then melting, extruding, and granulating them through a twin-screw extruder to obtain first plastic particles; mixing the first plastic particles with styrene-butadiene-styrene block copolymer, mixing them evenly in a high-speed mixer, and then melting, extruding, and granulating them through a twin-screw extruder to obtain second plastic particles; mixing the second plastic particles with AC foaming agent and epoxy soybean oil, and mixing them evenly in a high-speed mixer to obtain a mixture for a foaming layer;

[0037] Step 3, preparing a sheet substrate: the shell layer mixture is evenly divided and added to the first extruder and the second extruder, and the foaming layer mixture is added to the third extruder, and the three layers are melt co-extruded and cooled to form a sheet substrate with a foaming layer in the middle and outer shell layers and inner shell layers on both sides;

[0038] Step 4: preparing the decorative layer: hot pressing the patterned elastomeric protective film onto the outer shell layer, and then using an embossing roller to press the patterned elastomeric protective film to form three-dimensional patterns to obtain the bathtub skirt multifunctional sheet material.

[0039] The preparation steps of the antibacterial masterbatch are as follows: adding the silver acetate solution into polypropylene and stirring and mixing thoroughly, then adding 4,5-dichloro-2-octyl-4-isothiazoline-3-one, mixing thoroughly to obtain an antibacterial mixture, and granulating the antibacterial mixture through a twin-screw extruder to obtain an antibacterial masterbatch antibacterial agent.

[0040] Example 2

[0041] This embodiment provides a bathtub skirt multifunctional sheet material, the bathtub skirt multifunctional sheet material comprises an inner shell layer, an outer shell layer and an insulation layer located between the inner shell layer and the outer shell layer, and the outer shell layer is provided with a decorative layer on the side away from the insulation layer. The inner shell layer and the outer shell layer comprise the following raw materials in parts by weight: 75 parts of high-impact polystyrene, 3 parts of dibutyl sebacate, 6 parts of polymethyl methacrylate, 1683 parts of antioxidant, 1 part of paraffin and 24 parts of antibacterial masterbatch. The antibacterial masterbatch comprises the following components in parts by weight: 10 parts of 4,5-dichloro-2-n-octyl-4-isothiazoline-3-one, 3 parts of silver acetate solution and 80 parts of polypropylene. The insulation layer is a recycled polystyrene foaming layer, and the recycled polystyrene foaming layer comprises the following components in parts by weight: 65 parts of recycled polystyrene, 15 parts of recycled polyethylene, 10 parts of styrene-butadiene-styrene block copolymer, 6 parts of AC foaming agent and 6 parts of epoxy soybean oil.

[0042] The preparation method of the bathtub skirt multifunctional plate is consistent with that in the embodiment.

[0043] Example 3

[0044] This embodiment provides a bathtub skirt multifunctional sheet material, the bathtub skirt multifunctional sheet material comprises an inner shell layer, an outer shell layer and an insulation layer located between the inner shell layer and the outer shell layer, and the outer shell layer is provided with a decorative layer on the side away from the insulation layer. The inner shell layer and the outer shell layer comprise the following raw materials in parts by weight: 70 parts of high-impact polystyrene, 3 parts of dibutyl sebacate, 5 parts of polymethyl methacrylate, 1682 parts of antioxidant, 1 part of paraffin and 20 parts of antibacterial masterbatch. The antibacterial masterbatch comprises the following components in parts by weight: 10 parts of 4,5-dichloro-2-n-octyl-4-isothiazoline-3-one, 3 parts of silver acetate solution and 80 parts of polypropylene. The insulation layer is a recycled polystyrene foaming layer, and the recycled polystyrene foaming layer comprises the following components in parts by weight: 70 parts of recycled polystyrene, 18 parts of recycled polyethylene, 13 parts of styrene-butadiene-styrene block copolymer, 7 parts of AC foaming agent and 6 parts of epoxy soybean oil.

[0045] The preparation method of the bathtub skirt multifunctional plate is consistent with that in the embodiment.

[0046] Example 4

[0047] This embodiment provides a bathtub skirt multifunctional board material, the bathtub skirt multifunctional board material comprises an inner shell layer, an outer shell layer and an insulation layer between the inner shell layer and the outer shell layer, and the outer shell layer is provided with a decorative layer on a side away from the insulation layer. The inner shell layer and the outer shell layer comprise the following raw materials in parts by weight: 70 parts of high impact polystyrene, 3 parts of dibutyl sebacate, 5 parts of polymethyl methacrylate, 1682 parts of antioxidant and 1 part of paraffin. The insulation layer is a recycled polystyrene foam layer, and the recycled polystyrene foam layer comprises the following components in parts by weight: 65 parts of recycled polystyrene, 15 parts of recycled polyethylene, 10 parts of styrene-butadiene-styrene block copolymer, 6 parts of AC foaming agent and 6 parts of epoxy soybean oil.

[0048] The preparation method of the bathtub skirt multifunctional plate is as follows: Step 1, preparing a polystyrene blend: adding the high impact polystyrene, dibutyl sebacate, polymethyl methacrylate, antioxidant 168 and paraffin wax into a mixer according to a proportion and mixing them evenly to obtain a mixture for a shell layer, the stirring speed is 600 r / min, and the mixing time is 2-10 min;

[0049] Step 2, preparing a recycled polystyrene blend: mixing recycled polystyrene and recycled polyethylene according to a ratio, mixing them evenly in a high-speed mixer, and then melting, extruding, and granulating them through a twin-screw extruder to obtain first plastic particles; mixing the first plastic particles with styrene-butadiene-styrene block copolymer, mixing them evenly in a high-speed mixer, and then melting, extruding, and granulating them through a twin-screw extruder to obtain second plastic particles; mixing the second plastic particles with AC foaming agent and epoxy soybean oil, and mixing them evenly in a high-speed mixer to obtain a mixture for a foaming layer;

[0050] Step 3, preparing a sheet substrate: the shell layer mixture is evenly divided and added to the first extruder and the second extruder, and the foaming layer mixture is added to the third extruder, and the three layers are melt co-extruded and cooled to form a sheet substrate with a foaming layer in the middle and outer shell layers and inner shell layers on both sides;

[0051] Step 4: preparing the decorative layer: hot pressing the patterned elastomeric protective film onto the outer shell layer, and then using an embossing roller to press the patterned elastomeric protective film to form three-dimensional patterns to obtain the bathtub skirt multifunctional sheet material.

[0052] Example 5

[0053] This embodiment provides a bathtub skirt multifunctional sheet material, the bathtub skirt multifunctional sheet material comprises an inner shell layer, an outer shell layer and an insulation layer located between the inner shell layer and the outer shell layer, and the outer shell layer is provided with a decorative layer on the side away from the insulation layer. The inner shell layer and the outer shell layer comprise the following raw materials in parts by weight: 70 parts of high-impact polystyrene, 3 parts of dibutyl sebacate, 5 parts of polymethyl methacrylate, 1682 parts of antioxidant, 1 part of paraffin wax and 20 parts of antibacterial masterbatch. The antibacterial masterbatch comprises the following components in parts by weight: 10 parts of 4,5-dichloro-2-n-octyl-4-isothiazoline-3-one, 3 parts of silver acetate solution and 80 parts of polypropylene. The insulation layer is a recycled polystyrene foaming layer, and the recycled polystyrene foaming layer comprises the following components in parts by weight: 80 parts of recycled polystyrene, 10 parts of styrene-butadiene-styrene block copolymer, 6 parts of AC foaming agent and 6 parts of epoxy soybean oil.

[0054] The preparation method of the bathtub skirt multifunctional plate is as follows:

[0055] Step 1, preparing a polystyrene blend: adding the high impact polystyrene, dibutyl sebacate, polymethyl methacrylate, antioxidant 168, paraffin wax and antibacterial masterbatch into a mixer according to a proportion and mixing them evenly to obtain a mixture for a shell layer, with a stirring speed of 600 r / min and a mixing time of 2-10 min;

[0056] Step 2, preparing a recycled polystyrene blend: mixing recycled polystyrene with styrene-butadiene-styrene block copolymer, mixing the mixture evenly in a high-speed mixer, and then melting, extruding, and granulating the mixture through a twin-screw extruder to obtain first plastic particles; mixing the first plastic particles with an AC foaming agent and epoxy soybean oil, and mixing the mixture evenly in a high-speed mixer to obtain a mixture for a foaming layer;

[0057] Step 3, preparing a sheet substrate: the shell layer mixture is evenly divided and added to the first extruder and the second extruder, and the foaming layer mixture is added to the third extruder, and the three layers are melt co-extruded and cooled to form a sheet substrate with a foaming layer in the middle and outer shell layers and inner shell layers on both sides;

[0058] Step 4: preparing the decorative layer: hot pressing the patterned elastomeric protective film onto the outer shell layer, and then using an embossing roller to press the patterned elastomeric protective film to form three-dimensional patterns to obtain the bathtub skirt multifunctional sheet material.

[0059] The preparation steps of the antibacterial masterbatch are as follows: adding the silver acetate solution into polypropylene and stirring and mixing thoroughly, then adding 4,5-dichloro-2-octyl-4-isothiazoline-3-one, mixing thoroughly to obtain an antibacterial mixture, and granulating the antibacterial mixture through a twin-screw extruder to obtain an antibacterial masterbatch antibacterial agent.

[0060] The bathtub skirt multifunctional plates prepared in Examples 1 to 5 were subjected to performance testing.

[0061] Antimicrobial Testing:

[0062] Antibacterial performance before aging: measured according to the method of GB / T31402-2015;

[0063] Antibacterial performance after aging (after boiling for 24 hours): The sample was placed in a constant temperature water bath at 40°C and boiled for 24 hours, and then measured according to the method of GB / T31402-2015;

[0064] Comprehensive performance test: The heat deformation temperature, tensile strength at 23°C, flexural strength, Rockwell hardness, and cantilever beam impact strength of samples of Examples 1-5 were tested respectively.

[0065] The test results are shown in Table 1:

[0066] Table 1 is the test data of the bathtub skirt multifunctional board prepared in Examples 1 to 5

[0067]

[0068] From the above test data, we can see that after adding antibacterial masterbatch to the multifunctional board for bathtub skirt, the antibacterial performance of the board lasts for a long time and has good antibacterial performance. At the same time, the thermal deformation temperature of the board is high, which is completely sufficient for bathtub material, has good strength, good wear resistance, and has beautiful and durable effects.

[0069] The present invention is described in detail above in conjunction with the embodiments. It should be noted that the various specific technical features described in the above specific embodiments can be combined and changed in any suitable manner without contradiction, and the present invention will not further explain various possible combinations. In addition, other variations and combinations of the various technical features of the present invention should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A multifunctional bathtub skirt board, characterized in that: The multifunctional board material for bathtub skirt comprises an inner shell layer, an outer shell layer and an insulation layer between the inner shell layer and the outer shell layer, wherein a decorative layer is arranged on a side of the outer shell layer away from the insulation layer; the inner shell layer and the outer shell layer comprise the following raw materials in parts by weight: 60-80 parts of polystyrene, 1-5 parts of plasticizer, 3-8 parts of hydrophobic agent, 1-3 parts of antioxidant, 0.1-1 parts of lubricant and 15-25 parts of antibacterial masterbatch; the antibacterial masterbatch comprises the following components in parts by weight: 5-15 parts of antibacterial agent, 1-3 parts of inorganic sustained-release silver solution and 70-85 parts of resin; the insulation layer is a recycled polystyrene foaming layer, and the recycled polystyrene foaming layer comprises the following components in parts by weight: 60-70 parts of recycled polystyrene, 10-20 parts of recycled polyethylene, 5-15 parts of styrene-butadiene-styrene block copolymer, 4-10 parts of AC foaming agent and 3-8 parts of epoxy soybean oil.

2. The multifunctional bathtub skirt sheet according to claim 1, characterized in that: The decorative layer is formed by hot pressing an elastic protective film with patterns.

3. The multifunctional bathtub skirt sheet according to claim 2, characterized in that: The patterned elastic protective film consists of a patterned film and an elastic base film.

4. The multifunctional bathtub skirt sheet according to claim 3, characterized in that: The elastomer base film is a thermoplastic polyurethane base film.

5. The multifunctional sheet material for bathtub skirt according to claim 1, characterized in that: The polystyrene in the raw materials of the inner shell layer and the outer shell layer is high-impact polystyrene; the plasticizer is one or more of pentaerythritol, dibutyl sebacate, and diisononyl phthalate; the hydrophobic agent is one or a combination of polymethyl methacrylate and n-hexadecane; the antioxidant is one of antioxidant 1076 or antioxidant 168; and the lubricant is one or more of paraffin, stearic acid, butyl stearate, oleamide, or ethylene bisstearamide.

6. The multifunctional bathtub skirt sheet according to claim 1, characterized in that: The antibacterial agent in the antibacterial masterbatch is one or a mixture of 2-methyl-4-isothiazoline-3-one, 5-chloro-2-methyl-4-isothiazoline-3-one, 4,5-dichloro-2-n-octyl-4-isothiazoline-3-one; the inorganic sustained-release silver solution is one or a mixture of silver nitrate solution, silver acetate solution, and silver citrate solution; and the resin is one or a mixture of polypropylene, polyethylene, and EVA.

7. A method for preparing a bathtub skirt multifunctional sheet material, used for preparing the bathtub skirt multifunctional sheet material according to any one of claims 1 to 6, characterized in that: The steps include: Step 1, preparing a polystyrene blend: adding the polystyrene, plasticizer, hydrophobic agent, antioxidant, lubricant and antibacterial masterbatch into a mixer according to a proportion and mixing them evenly to obtain a mixture for a shell layer, with a stirring speed of 600 r / min and a mixing time of 2-10 min; Step 2, preparing a recycled polystyrene blend: mixing recycled polystyrene and recycled polyethylene according to a ratio, mixing them evenly in a high-speed mixer, and then melting, extruding, and granulating them through a twin-screw extruder to obtain first plastic particles; mixing the first plastic particles with styrene-butadiene-styrene block copolymer, mixing them evenly in a high-speed mixer, and then melting, extruding, and granulating them through a twin-screw extruder to obtain second plastic particles; mixing the second plastic particles with AC foaming agent and epoxy soybean oil, and mixing them evenly in a high-speed mixer to obtain a mixture for a foaming layer; Step 3, preparing a sheet substrate: the shell layer mixture is evenly divided and added to the first extruder and the second extruder, and the foaming layer mixture is added to the third extruder, and a sheet substrate with a foaming layer in the middle and an outer shell layer and an inner shell layer on both sides is obtained by melt co-extrusion and cooling and shaping; Step 4: preparing the decorative layer: hot pressing the patterned elastomeric protective film onto the outer shell layer, and then using an embossing roller to press the patterned elastomeric protective film to form three-dimensional patterns to obtain the bathtub skirt multifunctional sheet material.

8. The method for preparing the bathtub skirt multifunctional plate according to claim 7, characterized in that: The preparation method of the antibacterial masterbatch is to add the inorganic slow-release silver solution to the resin and stir and mix thoroughly, then add the antibacterial agent, mix thoroughly to obtain an antibacterial mixture, and granulate the antibacterial mixture through a twin-screw extruder to obtain an antibacterial masterbatch antibacterial agent.

9. The method for preparing the bathtub skirt multifunctional plate according to claim 7, characterized in that: In step three, the first extruder melts and plasticizes the mixture for the shell layer at 220-250°C, and squeezes it into the first layer flow channel of the distributor; the second extruder melts and plasticizes the mixture for the shell layer at 220-250°C, and squeezes it into the second layer flow channel of the distributor; the third extruder melts the mixture for the foaming layer at 220-250°C, and squeezes it into the third layer flow channel of the distributor; the first layer flow channel, the second layer flow channel and the third layer flow channel are connected to a three-layer co-extrusion head, the upper and lower layers of the three-layer co-extrusion head are respectively connected to the first layer flow channel and the second layer flow channel, and the middle layer of the three-layer co-extrusion head is connected to the third layer flow channel.

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