Granules for preparing floor or wall covering, and manufacturing method for granules

Abstract

Granules for preparing a floor or wall covering, and a manufacturing method for the granules. The granules for preparing a floor or wall covering comprises: 1-10% of natural rubber particles or powder and 90-99% of particles or powder containing thermoplastic polyurethane, wherein the particles or powder containing thermoplastic polyurethane is particles or powder for forming a thermoplastic polyurethane floor or covering, and the natural rubber particles or powder comprises 20-80% of a natural rubber. The addition of a natural rubber can improve the elasticity and wear resistance of a halogen-free plastic floor or wall covering.

Description

Granules for preparing floor or wall coverings and method for manufacturing the same TECHNICAL FIELD

[0001] The present application relates to the technical field of floor, in particular to a kind of granules for preparing floor or wall coverings and method for manufacturing the same. BACKGROUND

[0002] At present, the plastic floor and floor or wall coverings used in market are mostly based on polyvinyl chloride resin, adding filler, plasticizer, stabilizer, pigment and other ingredients, which are produced by extrusion and calendering process on continuous production line. Such products are popular in the market due to their low cost, easy construction and other factors. With people's increasing emphasis on environmental protection, halogen-free elastic floor, floor or wall coverings, such as thermoplastic polyurethane, polypropylene, polyethylene terephthalate / polyethylene, are gradually appearing in the market as main raw materials of plastic elastic floor, floor or wall coverings, but there are still some defects in related products. SUMMARY

[0003] The purpose of the embodiments of the present application is to provide a kind of granules for preparing floor or wall coverings and method for manufacturing the same. The inventor develops a kind of granules for preparing floor or wall coverings with better performance by adjusting the formula of the granules.

[0004] In order to achieve the above-mentioned purpose, in the first aspect, the embodiments of the present application provide a kind of granules for preparing floor or wall coverings, which comprises 1%-10% of natural rubber particles or powder, and 90%-99% of particles or powder containing thermoplastic polyurethane, wherein the particles or powder containing thermoplastic polyurethane are particles or powder for forming thermoplastic polyurethane floor or coverings, and the natural rubber particles or powder comprise 20%-80% of natural rubber.

[0005] In the second aspect, the embodiments of the present application provide a kind of manufacturing method of granules for preparing floor or wall coverings, which comprises:

[0006] Step S1, proportioning raw materials for forming the natural rubber particles or powder, and mixing the proportioned raw materials into block-shaped articles;

[0007] Step S2, mixing the block-shaped articles formed in step S1 to form sheet-shaped articles;

[0008] Step S3, manufacturing the sheet-shaped articles formed in step S2 into particles or powder to form the natural rubber particles or powder; and

[0009] Step S4, mixing 1%-10% of the natural rubber particles or powder and 90%-99% of the thermoplastic polyurethane-containing particles or powder to form the granules for preparing the floor or wall covering, wherein the thermoplastic polyurethane-containing particles or powder are particles or powder for forming a thermoplastic polyurethane floor or covering, and the natural rubber particles or powder include 20%-80% of natural rubber.

[0010] In a third aspect, the embodiments of the present application provide a floor or wall covering, comprising a floor body, wherein the floor body comprises: the above-mentioned granules for preparing the floor or wall covering; and / or the above-mentioned granules for preparing the floor or wall covering are prepared according to the above-mentioned method.

[0011] The granules for preparing the floor or wall covering provided by the embodiments of the present application do not affect the performance of the thermoplastic polyurethane-containing particles or powder by adding the natural rubber. The thermoplastic polyurethane-containing particles or powder can form a thermoplastic polyurethane floor or wall covering, so as to be equivalent to adding natural rubber to the thermoplastic polyurethane floor or wall covering without affecting its performance. In addition, the addition of natural rubber can enhance the elasticity and wear resistance of the halogen-free plastic floor or wall covering.

[0012] Other features and advantages of the embodiments of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0013] The accompanying drawings are included to provide a further understanding of the embodiments of the present application, and constitute a part of the specification, and are used together with the following specific embodiments to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. In the drawings:

[0014] FIG. 1 is a structural schematic diagram of a rubber homogeneous transparent floor with a flash particle structure;

[0015] FIG. 2 is a process flow diagram for manufacturing flash particles when the coating material is a raw material mixture;

[0016] FIG. 3 is a process flow diagram of non-vulcanized natural rubber particles;

[0017] FIG. 4 is a process flow diagram of mixed granules;

[0018] FIG. 5 is a process flow diagram of a rubber homogeneous transparent floor with a flash particle structure;

[0019] FIG. 6 is a finished product effect diagram of a rubber homogeneous transparent floor with a flash particle structure.

[0020] FIG. 7 shows a process flow diagram of a manufacturing method for preparing the granules for preparing the floor or wall covering.

[0021] In the drawings:

[0022] 1, floor body; 2, flash particle; 3, double screw extruder; 31, vacuum port. DETAILED DESCRIPTION

[0023] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present application, and are not intended to limit the present application.

[0024] In the existing floor production technology, pearlescent powder as a kind of pigment additive to enhance the appearance of the product, is often directly added to the floor formula, usually including mixing various types of pearlescent powder directly into the raw materials, after processing through the extruder, through two roll pressing into sheet, and then crushing through the crusher for crushing treatment, so as to form irregular particles, which are then added to the environmentally friendly rubber floor material, aiming to enhance the visual effect of the floor, however, this conventional production method has the problems of significant loss of pearlescent effect and uneven distribution efficiency and quality defects, resulting in unsatisfactory flash effect of the final product.

[0025] At the same time, in order to obtain the required elasticity and wear resistance, natural rubber particles need to be added to the rubber floor, but due to the very sticky non-vulcanized natural rubber particle material, it will form clumps after a short period of standing, and cannot be added to the non-vulcanized elastic rubber floor, while the vulcanized natural rubber particles have formed a cross-linked structure by chemical reaction induced by heating, and the particle hardness cannot be processed again, which will cause material cracking, the current rubber floor production process due to small batch, phased production method, not only has large color difference, but also produces a variety of waste gases during high temperature vulcanization, including flue gas, various sulfur oxides, hydrogen sulfide, etc. Sulfides, mercaptans, hydrocarbons and indole waste gas, if these waste gases are not effectively collected and treated, they will have a significant impact on the environment.

[0026] In view of the deficiencies of the prior art, the purpose of the present application is to provide a rubber homogeneous transparent floor with flash particle structure, so as to improve the pearlescent effect of the flash particle in the homogeneous transparent floor, and reduce waste gas emission and treatment through non-vulcanized rubber.

[0027] The technical purposes are achieved by the following technical scheme: a rubber homogeneous transparent floor with flash particle structure, comprising a floor body, the floor body comprises a plurality of mixed granules, the mixed granules are provided with a plurality of flash particles and non-vulcanized natural rubber particles, the flash particles comprise pearl powder and transparent thermoplastic elastomer, the outer surface of the pearl powder is provided with a coating, the coating is a liquid slip agent, the liquid slip agent is 1% stearic acid, the pearl powder is mixed with the raw material mixture after being coated by the coating, the pearl powder is embedded in the raw material mixed particles formed by the raw material mixture after shaping, and the raw material mixture comprises the following raw materials in a weight ratio: 93-97% thermoplastic elastomer, 0.4-0.6% ultraviolet resistant agent, 0.3-0.8% antioxidant and auxiliary additives.

[0028] The application further discloses a rubber homogeneous transparent floor with flash particle structure, comprising a floor body, the floor body comprises a plurality of mixed granules, the mixed granules are provided with a plurality of flash particles and non-vulcanized natural rubber particles, the flash particles comprise pearl powder and transparent thermoplastic elastomer, the outer surface of the pearl powder is provided with a coating, the coating is used to coat the pearl powder in the method that the pearl powder is added after a plurality of shearing operations of a raw material mixture are completed, and the raw material mixture comprises the following raw materials in a weight ratio: 93-97% thermoplastic elastomer, 0.4-0.6% ultraviolet resistant agent, 0.3-0.8% antioxidant and auxiliary additives.

[0029] The application is further provided as follows: the non-vulcanized natural rubber particles comprise thermoplastic elastomer and filler, the thermoplastic elastomer comprises TPU or TPE, and the filler comprises kaolin or calcium carbonate.

[0030] The application is further provided as follows: the processing equipment of the flash particles comprises a double-screw extruder, a plurality of shearing modules are arranged in the cylinder of the double-screw extruder, a vacuum port is formed in the double-screw extruder, and a pearl powder adding mechanism is arranged at the front end of the vacuum port.

[0031] The application is further provided as follows: the processing process steps of the flash particles are as follows:

[0032] Step one, first, 93-97% thermoplastic elastomer, 0.4-0.6% ultraviolet resistant agent, 0.3-0.8% antioxidant and auxiliary additives are put into a high-speed mixer for blending, and after discharging, the raw material mixture is dried;

[0033] Step two, the raw material mixture is added into the feeding port of the double-screw extruder for melt blending, the raw material mixture passes through the shearing modules at the front end of the vacuum port of the double-screw extruder, the pearl powder is added from the pearl powder adding mechanism and mixed with the raw material mixture in a molten state, and then passes through the shearing modules arranged in the conveying section of the double-screw extruder.

[0034] Step three, after extrusion granulation, drying to get flash granules.

[0035] The application is further provided that the length-diameter ratio of the double screw extruder is greater than 34:1, and the number of times that the pearlescent powder passes through the shearing module is less than the number of times that the raw material mixture passes through the shearing module, and the difference is at least 1.

[0036] The application is further provided that the manufacturing process steps of the non-vulcanized natural rubber particles are as follows:

[0037] Step one, put the following raw materials in a high-speed mixer in a weight ratio of 10-16% thermoplastic elastomer, 5-12% silicon dioxide, 4-8% rutile titanium dioxide, and 28-35% kaolin or calcium carbonate, and mix them evenly to obtain a non-vulcanized natural rubber mixture;

[0038] Step two, cool the non-vulcanized natural rubber mixture and put it into an internal mixer, add 30-40% natural rubber blocks from the feeding port of the internal mixer for internal mixing, and then put it into an open mill after internal mixing is completed to obtain a rubber compound;

[0039] Step three, use a tablet press to press the rubber compound into a sheet, and then crush it into non-vulcanized natural rubber particles using a crusher;

[0040] Step four, pour the non-vulcanized natural rubber particles into 1-3% kaolin or calcium carbonate by weight and stir slowly.

[0041] The application is further provided that the processing steps of the mixed granules are as follows:

[0042] Step one, put 35-70% thermoplastic elastomer, 0-10% SEBS+white oil, 2-5% pigment, 0-2% compatibilizer, 0.6-1% antioxidant, 0.6-1.2% ultraviolet resistant agent, 0.5-1% processing stabilizer, 3-15% non-halogen composite combustion improver, 10-25% non-halogen inorganic flame retardant, 0-30% filler, 0-5% non-vulcanized natural rubber particles, and 0-25% self-regeneration material into a high-speed mixer, mix them evenly, and cool them in a low-speed mixer to obtain a mixture;

[0043] Step two, melt blend the mixture in a double screw extruder, plasticize and extrude the mixture to obtain a rope material;

[0044] Step three, press the rope material into a sheet on a two-roll open mill, and then crush it into particles using a crusher;

[0045] Step four, put the particles into a horizontal mixer and mix them to obtain mixed granules.

[0046] The application is further provided with the processing process steps of the rubber homogeneous full-core floor with the flash particle structure as follows:

[0047] Step one, uniformly mix the mixed granules and 0.5-3% flash particles to obtain broken particles;

[0048] Step two, lay the base cloth under the spreading device, add the mixed broken particles into the spreading device, and uniformly lay the broken particles;

[0049] Step three, send the base cloth with the broken particles into the oven channel, heat and roast, and then pass through the low-temperature compression roller to obtain the compression layer;

[0050] Step four, coat the UV coating on the surface of the compression layer, perform the annealing treatment through the oven channel, separate the floor body from the base cloth, and wind up.

[0051] In summary, the application has the following beneficial effects:

[0052] Through the process improvement of the flash pearl powder, the production of the flash particle in the rubber homogeneous full-core floor with the flash particle structure is realized, the non-vulcanized natural rubber particles are added in the rubber homogeneous full-core floor through the formula and process, the better elasticity effect is realized, the waste gas generated in the high-temperature vulcanization process in the process is reduced, the floor product can be recycled and reused, the recycling renewable resources are realized, in addition, the rubber color difference control effect of the non-vulcanized natural rubber process is obviously better than that of the traditional rubber control, the consistent color performance is effectively maintained, through the material selection and process improvement, not only the functionality and environmental friendliness of the rubber homogeneous full-core floor are improved, but also the visual effect of the product is optimized.

[0053] As shown in FIG. 1 and FIG. 6, the rubber homogeneous transparent floor with flashing particle structure includes a floor body 1, which is formed by processing a plurality of mixed granules, the mixed granules are provided with a plurality of flashing particles 2 and non-vulcanized natural rubber particles, the flashing particles 2 include pearlescent powder and transparent thermoplastic elastomer, the raw material of the pearlescent powder is synthetic fluorphlogopite coated with silicon dioxide, titanium dioxide and tin dioxide, the selected pearlescent powder has good flashing effect, the thermoplastic elastomer includes transparent TPU or TPE, and the non-vulcanized natural rubber particles include thermoplastic elastomer and filler, the filler includes kaolin or calcium carbonate, the formula of the flashing particle 2 is 96% thermoplastic elastomer, 3% pearlescent powder, 0.5% antioxidant and 0.5% light stabilizer, the microstructure of the pearlescent powder is flaky, which can reflect and refract light, and produce multi-level reflection effect, when the light irradiates the surface of the pearlescent powder, the light of different angles will be reflected and transmitted differently, forming visual flashing effect, in order to slow down the flashing loss of the pearlescent powder in the processing process and reduce the weakening degree of the flashing effect, the outer surface of the pearlescent powder is provided with a coating, and the pearlescent powder coated by the coating still has high pearlescent efficiency after processing, and the floor body 1 has good flashing effect.

[0054] Example 1-1

[0055] The coating on the outer surface of the pearlescent powder is a liquid lubricant, the liquid lubricant is 1% stearic acid, which is a long-chain fatty acid composed of a carbon chain of 18 carbon atoms and a terminal carboxyl group (-COOH), this structure gives stearic acid good hydrophobicity and the ability to form a protective film on the surface of the pearlescent powder, this protective film acts as a lubricant, reducing the direct contact of the pearlescent powder and reducing the damage caused by shear force, 1% stearic acid is added to the pearlescent powder, stirred at 85°C for 5 minutes at a slow speed of 60 revolutions per minute, after coated by the coating, the pearlescent powder is mixed with the raw material mixture and added to the extruder with weak shear, and then the water drawing process is carried out to obtain semi-transparent flashing particles 2 with good flashing effect, wherein the raw material mixture includes 96% thermoplastic elastomer, 0.5% ultraviolet resistant agent, 0.5% antioxidant and auxiliary additives, the coated pearlescent powder has good shear effect, and the pearlescent powder is not easy to be crushed, and the flashing effect of the pearlescent powder is retained.

[0056] Example 1-2

[0057] As shown in Figure 2, the coating on the outer surface of the pearlescent powder is the raw material mixture, and the coating is carried out by adding the pearlescent powder after the raw material mixture completes several shearing operations, to obtain the semi-transparent glittering particles 2. The processing equipment of the glittering particles 2 includes a double screw extruder 3, the barrel of the double screw extruder 3 is provided with a shearing module, the double screw extruder 3 is provided with a vacuum port 31, the front end of the vacuum port 31 is provided with a pearlescent powder adding mechanism, and the rear end of the vacuum port 31 is the conveying section of the double screw extruder 3. The number of shearing modules in the front end of the vacuum port 31 is greater than or equal to 2 sections, and the conveying section is provided with 0-1 section shearing modules.

[0058] The processing steps of the glittering particles 2 are as follows:

[0059] Step one, first put 96% thermoplastic elastomer, 0.5% ultraviolet resistant agent, 0.5% antioxidant and auxiliary additives into a high-speed mixer for blending, so as to fully mix them, and then dry the mixture to obtain a raw material mixture;

[0060] Step two, add the raw material mixture into the feeding port of the double screw extruder 3 for melt blending, the raw material mixture passes through the shearing modules in the front end of the vacuum port 31 of the double screw extruder 3, and then add 3% pearlescent powder from the pearlescent powder adding mechanism to mix with the melt raw material mixture, and then pass through the shearing modules arranged in the conveying section of the double screw extruder 3.

[0061] Step three, draw a wire by weight loss or adjusting the extrusion speed ratio, and then dry the extruded and granulated product to obtain the glittering particles 2.

[0062] The pearlescent powder adding mechanism is arranged at the end of the double screw extruder 3 and in the front end of the vacuum port 31, so that the raw material mixture can pass through the shearing modules completely, and the number of times of passing through the shearing modules by the pearlescent powder is reduced. A double screw extruder 3 with a length-diameter ratio of 34:1 or more is used to plasticize the raw material mixture by barrel temperature and weaken the shearing. The pearlescent powder is melt mixed with the raw material mixture that has passed through the shearing modules in the front end of the vacuum port 31 of the double screw extruder 3. After mixing, the melt raw material mixture wraps the pearlescent powder, and the semi-transparent glittering particles 2 with good glittering effect are obtained after extruding, granulating and drying.

[0063] Examples 1-3

[0064] As shown in Figure 3, the processing steps of the non-vulcanized natural rubber particles are as follows:

[0065] Step one, put the following raw materials in a proportion by weight: 15% thermoplastic elastomer, 10% silicon dioxide, 8% rutile titanium dioxide and 32% kaolin or calcium carbonate into a high-speed mixer for mixing to obtain a non-vulcanized natural rubber mixture;

[0066] Step two, the non-vulcanized natural rubber mixture is cooled and put into the internal mixer, 35% natural rubber blocks are added from the feeding port of the internal mixer for internal mixing, and after the internal mixing is completed, it is put into the open mill to obtain a rubber compound;

[0067] Step three, the rubber compound is pressed into a sheet by a sheet press, and is crushed into non-vulcanized natural rubber particles by a crusher;

[0068] Step four, the non-vulcanized natural rubber particles are again poured into 1-3% kaolin or calcium carbonate by weight, and stirred slowly.

[0069] The non-vulcanized natural rubber particles obtained by the process have low viscosity, and after crushing, a small amount of kaolin or calcium carbonate is used to cool and isolate the non-vulcanized natural rubber particles, thereby reducing the degree of adhesion and facilitating subsequent processing and molding. The process reduces the waste gas generated during the high-temperature vulcanization process.

[0070] Example 1-4

[0071] As shown in Figures 2 and 4, the processing steps of the mixed granules are as follows:

[0072] Step one, 45% thermoplastic polyurethane elastomer, 5% SEBS+white oil, 3% pigment, 1% compatibilizer, 0.6% antioxidant, 0.6% ultraviolet light resistant agent, 0.8% processing stabilizer, 10% non-halogen composite combustion improver, 15% non-halogen inorganic flame retardant, 10% filler, 3% non-vulcanized natural rubber particles and 6% self-regeneration material are put into a high-speed stirrer to mix uniformly, and are stirred and cooled in a low-speed stirrer to obtain a mixture;

[0073] Step two, the mixture is fed into a twin-screw extruder 3 for melt blending, and the mixture is plasticized and extruded to obtain a rope material;

[0074] Step three, the rope material is placed on a two-roll open mill to be pressed into different colored sheets, which are then crushed into different colored particles by a crusher;

[0075] Step four, the different colored particles are put into a horizontal mixer to obtain mixed granules.

[0076] The mixture is crushed into different colored particles using a large mixing device, so that the one-time mixing amount is more than 4.8T, and the different pots are extracted for re-mixing, thereby improving the color consistency of the whole batch of granules, making the color of the produced product more consistent, and further reducing the rubber color difference defect.

[0077] Example 1-5

[0078] As shown in Figures 1 and 5, the processing steps of the rubber homogeneous transparent floor with flashing particle structure are as follows:

[0079] Step one, mix the mixed granules and 3% flash particles 2 evenly, to get broken particles;

[0080] Step two, lay the base cloth under the spreading device, add the mixed broken particles into the spreading device, evenly lay the broken particles;

[0081] Step three, send the base cloth with broken particles to the oven channel, heat and roast, then pass through the low-temperature pressure roller to calender into a sheet, to get a compression layer;

[0082] Step four, coat the UV coating on the surface of the compression layer, go through the annealing process in the oven, separate the floor body 1 from the base cloth, and wind up.

[0083] As shown in Figures 1-6, the mixed granules of different colors are pressed into gradient colors and broken, so that the final produced floor body 1 forms a pull pattern on the surface, and the transparent flash particles 2 with good flash effect after fusion can be seen on the surface of the floor body 1. Through the formula and process, non-vulcanized natural rubber particles are added in the environmentally friendly rubber homogeneous core floor, which improves the elasticity effect of the floor body 1 and realizes the production of flash particles 2 in the flash particle structure of the rubber homogeneous core floor, reducing the waste gas generated in the high-temperature vulcanization process.

[0084] Performance test:

[0085] Table 1-1 is a specification of the rubber homogeneous core floor with flash particle structure produced:

[0086] Table 1-1

[0087] The following is the halogen content test of the rubber homogeneous core floor with flash particle structure produced, the detection method is reference to EN14582:2016, and IC is used for analysis and detection results are shown in Table 1-2:

[0088] Table 1-2

[0089] As can be seen from Table 1-2, the rubber homogeneous core floor with flash particle structure does not contain halogen, has environmental friendliness, safety to human health and durability.

[0090] Currently, most of the plastic floor and floor or wall coverings used in the market are mainly based on polyvinyl chloride resin, adding fillers, plasticizers, stabilizers, pigments and other ingredients, and produced by extrusion and calendering process on a continuous production line. Such products are popular in the market due to their low cost and easy installation. With the increasing emphasis on environmental protection, halogen-free elastic floor, floor or wall covering, such as thermoplastic polyurethane, polypropylene, polyethylene terephthalate / polyethylene, etc. as the main raw material, has appeared in the market, but there are still some defects in the related products.

[0091] The granules for preparing floor or wall coverings provided by the embodiments of the present application include 1%-10% of natural rubber particles or powder, and 90%-99% of thermoplastic polyurethane-containing particles or powder, wherein the thermoplastic polyurethane-containing particles or powder are particles or powder for forming thermoplastic polyurethane floor or coverings.

[0092] The natural rubber particles or powder can include 20%-80% of natural rubber.

[0093] The natural rubber particles or powder can also include other raw materials, for example, can include 20%-60% of calcium carbonate.

[0094] In some optional examples, the natural rubber particles or powder can also include 1%-10% of rutile titanium dioxide, 1%-6% of antioxidant, 1%-4% of light stabilizer, 1%-10% of rubber plasticizer, 1-10% of synthetic rubber-like material, and / or 1%-10% of talc, etc. The synthetic rubber-like material can be resin-based, for example, can be styrene-butadiene rubber, etc.

[0095] In other optional examples, 1%-3% of anti-blocking separation agent can be added to the natural rubber particles or powder to prevent the natural rubber particles or powder from blocking. The anti-blocking separation agent can be talc, etc.

[0096] The granules for preparing floor or wall coverings provided by the embodiments of the present application contain 0.5%-5% of natural rubber.

[0097] The thermoplastic polyurethane-containing particles or powder can be any type of thermoplastic polyurethane-containing particles or powder contained in thermoplastic polyurethane floor or coverings. The thermoplastic polyurethane-containing particles or powder can include 20%-90% of thermoplastic polyurethane elastomer.

[0098] In an exemplary embodiment, the thermoplastic polyurethane-containing particles or powders can include 0% to 20% of a polyolefin resin or copolymer resin, 20% to 60% of a thermoplastic polyurethane elastomer, 1% to 12% of a compatibilizer, 0% to 15% of a modified polymer resin, and 20% to 65% of a filler. In any exemplary embodiment of the present application, the thermoplastic polyurethane elastomer is equivalent to a thermoplastic polyurethane.

[0099] The polyolefin resin or copolymer resin includes, but is not limited to, one or more of high transparent random copolymer polypropylene, linear low density polyethylene (LLDPE), ethylene-octene copolymer, ethylene-vinyl acetate copolymer, hydrogenated styrene / butadiene copolymer. In some exemplary embodiments, the polyolefin resin or copolymer resin can also include, but is not limited to, one or more of low density polyethylene (LDPE), very low density polyethylene (VLDPE), ultra low density polyethylene (ULDPE), medium density polyethylene (MDPE), polypropylene (PP), polymethylpentene (PMP), polybutene-1 (PB-1), stereoblock PP, olefin block copolymer, propylene-butane copolymer, polystyrene (PS), polyisobutylene (PIB), poly-α-olefin, ethylene-propylene rubber (EPR), ethylene-propylene-diene monomer (EPDM rubber), hydrogenated SBS, etc. The polyolefin resin or copolymer resin preferably includes hydrogenated styrene / butadiene copolymer. By introducing the polyolefin resin or copolymer resin into the raw material, the processing temperature can be reduced, and the tensile breaking strength can be improved.

[0100] The Shore hardness of the thermoplastic polyurethane elastomer can be 70 to 110A.

[0101] The compatibilizer includes, but is not limited to, one or more of a thermoplastic polyester elastomer, maleic anhydride grafted polyethylene, and a modified polyolefin. The modified polyolefin is, for example, Surlyn TM , ELVALOY TM , Escor TM , etc.

[0102] The modified polymer resin is one of a copolymer of ethylene-vinyl acetate, in which the copolymer of ethylene-vinyl acetate has vinyl acetate inside, and the content of the vinyl acetate is 14% to 28%, and a styrene-ethylene-butadiene-styrene copolymer resin, in which the styrene-ethylene-butadiene-styrene copolymer resin is filled with white oil, and the content of the white oil is 10% to 50%.

[0103] Fillers can be included in these components of the covering. The form of the filler can be fibers, powders, beads, and combinations thereof. Non-limiting examples of suitable fillers include those selected from the group of limestone, talc, mica, wollastonite, kaolin, mica, glass fibers, glass beads, and combinations thereof. Generally, the fillers do not interact with the composition or provide efficacy in the manner of a functional additive. The fillers can be present in amounts of about 35% to about 65% by weight of the sheet component. The filler size can be any suitable size, such as about 30 mesh to about 8000 mesh. Other suitable ranges of filler size include 100 mesh to about 5000 mesh. Other suitable ranges of filler size can also be included herein.

[0104] Optionally, the particles or powders of the thermoplastic polyurethane can further include one or more of the following raw materials in the following weight percentages: 6% to 25% of a flame retardant, 0.1 to 1.2% of an antioxidant, 0.2 to 2.0% of a light stabilizer, 0.5 to 1.5% of a processing aid, and 0.1 to 1.0% of a lubrication system aid. In optional embodiments, the raw materials of the halogen-free plastic floor or wall covering can further include pigments, the weight percentage of which can be 2% to 4%, and which can consist of black and white pigments in a 1:1 ratio.

[0105] The flame retardant is used to improve the fire resistance of the product. The flame retardant can include at least one flame retardant selected from solid flame retardants, liquid flame retardants, and combinations thereof. Non-limiting examples of flame retardants include aluminum trihydrate (ATH), melamine, melamine cyanurate, ammonium polyphosphate, melamine polyphosphate, hypophosphite, phenoxy hypophosphite, phenoxy cyclotriphosphazene; bisphenol A diphosphate (BDP), tetraphenyl resorcinol bis(diphenyl phosphate) (RDP), magnesium hydroxide, and combinations thereof.

[0106] The antioxidant can be one or more of antioxidant 1010, antioxidant 1076, 2112-antioxidant, AO-60-antioxidant, PEP-36-antioxidant, HP-10-antioxidant, S80-antioxidant, GP-antioxidant, AO-168 antioxidant, AO-626 antioxidant, AO-B225 antioxidant, and AO-B2777 antioxidant. The antioxidant can preferably be one or more of AO-168 antioxidant, AO-626 antioxidant, AO-B225 antioxidant, and AO-B2777 antioxidant, which can significantly improve the horizontal burning rating of the product, thereby significantly improving the burning performance of the product.

[0107] The light stabilizer can be an ultraviolet light stabilizer, which can be, for example, ultraviolet absorber UV362, or ultraviolet absorber UV328, etc. The light stabilizer can also be, for example, Tinuvin 770, etc.

[0108] The processing aid can be one of or a mixture of two or more of the following: polyethylene wax, silicone powder, calcium stearate, zinc stearate, stearic acid amide, and distearic acid amide, etc.

[0109] The lubrication system aid includes at least one of the following: a solid lubricant of a multi-functional fatty acid complex ester, stearic acid, ethylene bis-stearamide (EBS), silicone powder, and combinations thereof, etc. In optional embodiments, the lubrication system aid can also include, but is not limited to, one or more of the following: paraffin wax, PE wax, stearate, monoglyceride, PETS, and TAF lubricant, etc.

[0110] Optionally, the thermoplastic polyurethane particles or powders can also include 0.5%-10% of pearlescent particles, preferably 1%-3% of pearlescent particles, and more preferably 2% of pearlescent particles. The pearlescent particles include the following weight percentages of materials: 90%-99.5% of thermoplastic polyurethane elastomer, 0.2%-1.0% of light stabilizer, and 0.25%-9% of pearlescent powder. Optionally, the formulation of the pearlescent particles can also include antioxidants and auxiliary additives, etc. The light stabilizer can be, for example, an ultraviolet light stabilizer. The ultraviolet light stabilizer can be, for example, ultraviolet absorber UV362, ultraviolet absorber UV328, or ultraviolet absorber UV329, etc. The Shore hardness of the thermoplastic polyurethane elastomer can be 70A-110A. The pearlescent particles give the product a visual effect of being dotted with transparent pearlescent particles or fragments, increasing the aesthetic appeal of the product. The production and addition of the pearlescent powder can refer to the production and addition process of the aforementioned glitter particles.

[0111] The granules for preparing floor or wall coverings provided by the embodiments of the present application do not affect the performance of the thermoplastic polyurethane-containing particles or powders due to the addition of natural rubber. The thermoplastic polyurethane-containing particles or powders can form thermoplastic polyurethane floor or wall coverings, so that the natural rubber is added to the thermoplastic polyurethane floor or wall coverings without affecting their performance. In addition, the addition of natural rubber can enhance the elasticity and wear resistance of halogen-free plastic floor or wall coverings.

[0112] The embodiments of the present application also provide a manufacturing method for preparing granules for preparing floor or wall coverings. The granules for preparing floor or wall coverings can be the aforementioned granules for preparing floor or wall coverings. As shown in FIG. 7, the method can include steps S1-S4.

[0113] In step S1, the raw materials for forming the natural rubber particles or powders are proportioned, and the proportioned raw materials are mixed into a block-shaped article. The natural rubber particles or powders include 20%-80% of natural rubber.

[0114] The natural rubber particles or powders can further include other raw materials, for example, can include 20%-60% of calcium carbonate.

[0115] In some optional examples, the natural rubber particles or powders can further include: 1%-10% of rutile titanium dioxide, 1%-6% of antioxidant, 1%-4% of light stabilizer, 1%-10% of rubber plasticizer, 1-10% of synthetic rubber-like material, and / or 1%-10% of talc, etc. The synthetic rubber-like material can be resin-like, for example, can be styrene-butadiene rubber, etc.

[0116] In some examples, in step S1, other raw materials for forming the natural rubber particles or powders except natural rubber can be first proportioned and mixed, and then added to the rubber internal mixer. Next, the blocky natural rubber can be added to the rubber internal mixer through the inlet of the rubber internal mixer in a throwing manner according to the proportioning, so that the blocky natural rubber is mixed with the other raw materials for forming the natural rubber particles or powders to form the blocky article. The feeding amount of the thrown natural rubber can be different according to the model of the rubber internal mixer and the specific gravity. For example, if the model of the internal mixer is a 75L pressurized internal mixer, the total feeding amount is 65Kg. Based on the total feeding amount, each raw material can be added according to the proportion. In the present application, the speed of throwing the natural rubber can not be limited, for example, the required weight of the blocky natural rubber can be added at one time according to the mixed amount of the formula. In an example, if the throwing amount of the natural rubber is 23kg, mixing one batch of 65Kg of the total feeding amount is about 3-10 minutes.

[0117] The blocky natural rubber can be cut from a large blocky natural rubber. For example, the large blocky natural rubber can be cut into small pieces using a rubber cutting device to form the blocky natural rubber. The smaller the cut natural rubber, the better, for example, the length, width, and height of the cut blocky natural rubber can each range from 5cm to 10cm.

[0118] Step S2, the blocky article formed in step S1 is mixed to form a sheet-shaped article.

[0119] The mixed blocky article formed in step S1 can be sent into a rubber open mill for mixing to form a sheet-shaped article by, for example, a conveying system or manual transportation.

[0120] Step S3, the sheet-shaped article formed in step S2 is manufactured into particles or powders to form the natural rubber particles or powders.

[0121] Step S4, 1%-10% of the natural rubber particles or powder and 90%-99% of the thermoplastic polyurethane-containing particles or powder are mixed to form the granules for preparing the floor or wall covering. The thermoplastic polyurethane-containing particles or powder is any thermoplastic polyurethane-containing particles or powder used to form any thermoplastic polyurethane floor or covering.

[0122] In an example, in step S3, the sheet-shaped article formed in step S2 can be cut into a plurality of strip-shaped articles. The strip-shaped articles are fed into an extruder to be extruded into granular articles as the natural rubber particles or powder. In this example, the extruder can be, for example, an extrusion granulation device.

[0123] In yet another example, in step S3, the sheet-shaped article formed in step S2 can be broken into the granular articles by a sheet breaker as the natural rubber particles or powder. Here, the granules formed by the sheet breaker can be irregular granules.

[0124] In yet another example, in step S3, the sheet-shaped article formed in step S2 is broken into irregular granular articles by a sheet breaker, and then the irregular granular articles are ground into powder-shaped articles as the natural rubber particles or powder. For example, a powder grinder can be used to grind the irregular granular articles into powder-shaped articles.

[0125] In the manufacturing method for preparing the granules for the floor or wall covering provided by the embodiments of the present application, step S3 can further include adding 1%-3% of an anti-blocking separation agent to the formed natural rubber particles or powder and to the formed granules. The anti-blocking separation agent can be, for example, talc or the like. The manufactured natural rubber particles or powder can be packaged for storage and transportation.

[0126] The granules for preparing the floor or wall covering manufactured by the embodiments of the present application will contain 0.5%-5% of natural rubber.

[0127] The embodiments of the present application also provide a floor or wall covering, including a floor body, the floor body including: the above-described granules for preparing the floor or wall covering; and / or the above-described granules for preparing the floor or wall covering manufactured by the method.

[0128] Example 2-1

[0129] Table 2-1 lists the formulation of the natural rubber particles or powder and the formulation of the thermoplastic polyurethane-containing particles or powder in an example.

[0130] Table 2-1

[0131] The other resins in Table 2-1 can be, for example, synthetic rubber-based resins such as styrene-butadiene rubber, and the other ingredients can be, for example, talc and the like.

[0132] The thermoplastic polyurethane-containing particles or powders can be prepared in advance. Specifically, raw materials for forming the thermoplastic polyurethane-containing particles or powders can be processed to form the thermoplastic polyurethane-containing particles or powders. The processing methods include, for example, mixing the raw materials after compounding, and adding the compounded raw materials into a high-speed mixer; extruding the mixed raw materials through an extruder, rolling the extruded raw materials into a sheet using a two-roll calender, and obtaining the sheet by crushing the sheet using a crusher; and forming the sheet into particles or powders.

[0133] After the thermoplastic polyurethane-containing particles or powders, the granules for preparing the floor or wall covering can be prepared according to the method provided by the present application.

[0134] In the granules for preparing the floor or wall covering, the proportion of the natural rubber particles or powders prepared using the raw materials in Table 2-1 is 3%, and the proportion of the thermoplastic polyurethane-containing particles or powders is 97%. The granules for preparing the floor or wall covering including 3% of the natural rubber particles and 97% of the thermoplastic polyurethane-containing particles or powders are prepared into a finished product with a natural rubber formulation. The granules for preparing the floor or wall covering using 100% of the thermoplastic polyurethane-containing particles or powders are prepared into a finished product without a natural rubber formulation. The physical properties of the two products are compared as shown in Table 2-2 below.

[0135] Table 2-2

[0136] As can be seen from Table 2-2, the performance of the product is not affected after the addition of natural rubber. In addition, the addition of natural rubber can enhance the elasticity and wear resistance of the halogen-free plastic floor or wall covering.

[0137] The present application also provides the following examples:

[0138] Example 3-1, a rubber homogeneous full-core floor with sparkling particle structure, comprising a floor body (1), wherein the floor body (1) comprises a plurality of mixed granules, and the mixed granules are provided with a plurality of sparkling particles (2) and non-vulcanized natural rubber particles, the sparkling particles (2) comprise pearl powder and transparent thermoplastic elastomer, the outer surface of the pearl powder is provided with a coating, the coating is a liquid lubricant, the liquid lubricant is 1% stearic acid, the pearl powder is mixed with the raw material mixture after being coated with the coating, and the pearl powder is embedded in the raw material mixed particles formed by the raw material mixture after forming, and the raw material mixture comprises the following raw materials in a weight ratio: 93-97% thermoplastic elastomer, 0.4-0.6% ultraviolet resistant agent, 0.3-0.8% antioxidant, and auxiliary additives.

[0139] Example 3-2, a rubber homogeneous transparent floor with flash particle structure, comprising a floor body (1), the floor body (1) comprises a plurality of mixed granules, the mixed granules are provided with a plurality of flash particles (2) and non-vulcanized natural rubber particles, the flash particles (2) comprise pearl powder and transparent thermoplastic elastomer, the outer surface of the pearl powder is provided with a coating, the coating is coated on the pearl powder by a method of adding pearl powder after a plurality of shearing operations are completed on a raw material mixture, the raw material mixture comprises the following raw materials in a weight ratio: 93-97% thermoplastic elastomer, 0.4-0.6% ultraviolet resistant agent, 0.3-0.8% antioxidant and auxiliary additives.

[0140] Example 3-3, the rubber homogeneous transparent floor with flash particle structure according to example 3-1 or 3-2, the non-vulcanized natural rubber particles comprise thermoplastic elastomer and filler, the thermoplastic elastomer comprises TPU or TPE, and the filler comprises kaolin or calcium carbonate.

[0141] Example 3-4, the rubber homogeneous transparent floor with flash particle structure according to example 3-3, the processing equipment of the flash particles (2) comprises a double-screw extruder (3), a plurality of shearing modules are arranged in the cylinder of the double-screw extruder (3), the double-screw extruder (3) is provided with a vacuum port (31), and the front end of the vacuum port (31) is provided with a pearl powder adding mechanism.

[0142] Example 3-5, the rubber homogeneous transparent floor with flash particle structure according to example 3-4, the processing process steps of the flash particles (2) are as follows:

[0143] Step one, first put 93-97% thermoplastic elastomer, 0.4-0.6% ultraviolet resistant agent, 0.3-0.8% antioxidant and auxiliary additives into a high-speed mixer for blending, and dry the discharged material to obtain a raw material mixture;

[0144] Step two, add the raw material mixture into the feeding port of the double-screw extruder (3), melt and blend, add 1-3% pearl powder from the pearl powder adding mechanism to the raw material mixture in the molten state through the shearing module at the front end of the vacuum port (31) of the double-screw extruder (3), and pass through the shearing module arranged in the conveying section of the double-screw extruder (3); and

[0145] Step three, draw a wire by weight loss or adjusting the extrusion speed ratio, and dry the extruded and granulated flash particles (2).

[0146] Example 3-6. The rubber homogeneous through-floor with sparkling particle structure according to any one of examples 3-5, the length to diameter ratio of the twin-screw extruder (3) is greater than 34:1, the number of times the pearlescent powder passes through the shear module is less than the number of times the raw material mixture passes through the shear module and the difference is at least 1.

[0147] Example 3-7. The rubber homogeneous through-floor with sparkling particle structure according to any one of examples 3-4 to 3-6, the manufacturing process steps of the non-vulcanized natural rubber particles are as follows:

[0148] Step one, put the following raw materials in a high-speed mixer in the following weight ratio: 10-16% thermoplastic elastomer, 5-12% silicon dioxide, 4-8% rutile titanium dioxide, and 28-35% kaolin or calcium carbonate, and mix them evenly to obtain a non-vulcanized natural rubber mixture;

[0149] Step two, cool the non-vulcanized natural rubber mixture and put it into an internal mixer, add 30-40% natural rubber blocks from the feeding port of the internal mixer for mixing, and then put it into an open mill after mixing is completed to obtain a rubber compound;

[0150] Step three, use a tablet press to press the rubber compound into a sheet, and then crush it into non-vulcanized natural rubber particles using a crusher;

[0151] Step four, again put the non-vulcanized natural rubber particles into 1-3% kaolin or calcium carbonate by weight and stir slowly.

[0152] Example 3-8. The rubber homogeneous through-floor with sparkling particle structure according to example 3-7, the processing steps of the mixed granules are as follows:

[0153] Step one, put the following raw materials in a high-speed mixer in the following weight ratio: 10-16% thermoplastic elastomer, 5-12% silicon dioxide, 4-8% rutile titanium dioxide, and 28-35% kaolin or calcium carbonate, and mix them evenly to obtain a non-vulcanized natural rubber mixture;

[0154] Step two, melt blend the mixture in a twin-screw extruder (3), plasticize and extrude the mixture to obtain a rope;

[0155] Step three, place the rope on a two-roll open mill to press it into a sheet, and then crush it into particles using a crusher; and

[0156] Step four, put the particles into a horizontal mixer and mix them to obtain mixed granules.

[0157] Example 3-9, the rubber homogeneous solid core floor with flashing particle structure according to example 3-8, the processing steps of the rubber homogeneous solid core floor with flashing particle structure are as follows

[0158] Step one, the mixed granules and 0.5-3% flashing particles (2) are mixed uniformly to obtain broken particles;

[0159] Step two, the base cloth is laid under the spreading device, the mixed broken particles are added to the spreading device, and the broken particles are uniformly laid;

[0160] Step three, the base cloth with broken particles is sent into the oven channel, heated and baked, and then extruded into a sheet by a low-temperature compression roller to obtain a compression layer; and

[0161] Step four, the UV coating is coated on the surface of the compression layer, the floor body (1) is separated from the base cloth after annealing treatment in the oven channel, and the floor body (1) is wound up.

[0162] It should be understood by those skilled in the art that the above discussion of any of the embodiments is only exemplary and is not intended to imply that the scope (including claims) of the present application is limited to these examples; the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above. In order to be brief, they are not provided in details.

[0163] The present application is intended to cover all such alternatives, modifications and variations as fall within the broad scope of the appended claims. Accordingly, any and all such modifications, variations, alternatives and equivalents should be taken as falling within the scope of the present application.

Claims

1. A granulate for the preparation of a floor or wall covering, characterized in that, Comprises: 1-10% of natural rubber particles or powder, and 90-99% of thermoplastic polyurethane-containing particles or powder, wherein the thermoplastic polyurethane-containing particles or powder are particles or powder for forming thermoplastic polyurethane floor or covering, and the natural rubber particles or powder comprises 20-80% of natural rubber.

2. The granules for the preparation of floor or wall coverings according to claim 1, characterized in that, The natural rubber particles or powder further comprises 20-60% of calcium carbonate.

3. The granules for the preparation of floor or wall coverings according to claim 2, characterized in that, The natural rubber particles or powder further comprises: 1-10% of rutile titanium dioxide, 1-6% of antioxidant, 1-4% of light stabilizer, 1-10% of rubber plasticizer, 1-10% of synthetic rubber-like material, and / or 1-10% of talc powder.

4. The granules for the preparation of floor or wall coverings according to any one of claims 1-3, characterized in that, The thermoplastic polyurethane-containing particles or powder comprises 20-90% of thermoplastic polyurethane elastomer.

5. The granules for the preparation of floor or wall coverings according to any one of claims 1-4, characterized in that, The natural rubber particles or powder further comprises 1-3% of anti-blocking release agent.

6. A manufacturing method for manufacturing granules for preparing floor or wall covering, characterized in that, The method comprises: Step S1, proportioning raw materials for forming natural rubber particles or powder, and mixing the proportioned raw materials into block-shaped articles; Step S2, mixing the block-shaped articles formed in step S1 to form sheet-shaped articles; Step S3, manufacturing the sheet-shaped articles formed in step S2 into particles or powder to form the natural rubber particles or powder; and Step S4, mixing 1-10% of the natural rubber particles or powder and 90-99% of thermoplastic polyurethane-containing particles or powder to form granules for preparing the floor or wall covering, wherein the thermoplastic polyurethane-containing particles or powder are particles or powder for forming thermoplastic polyurethane floor or covering, and the natural rubber particles or powder comprises 20-80% of natural rubber.

7. The method of claim 6, wherein, The step S1 comprises: proportioning other raw materials for forming the natural rubber particles or powder except natural rubber, and adding to a rubber internal mixer; and adding block-shaped natural rubber according to the proportion to the rubber internal mixer, so that the block-shaped natural rubber is mixed with the other raw materials for forming the natural rubber particles or powder to form the block-shaped articles.

8. The method according to claim 6 or 7, characterized in that, The step S3 comprises: cutting the sheet-shaped articles formed in step S2 into a plurality of strip-shaped articles; and feeding the strip-shaped articles into an extruder to extrude into particle-shaped articles as the natural rubber particles or powder.

9. The method according to claim 6 or 7, characterized in that, The step S3 comprises: crushing the sheet-shaped articles formed in step S2 into particle-shaped articles by a sheet crusher as the natural rubber particles or powder.

10. The method of claim 6 or 7, wherein, The step S3 comprises: crushing the sheet-shaped articles formed in step S2 into irregular particle-shaped articles by a sheet crusher; and grinding the irregular particle-shaped articles into powder-shaped articles as the natural rubber particles or powder.

11. The method according to any one of claims 6-10, characterized in that, The step S3 further comprises: adding 1-3% of anti-blocking release agent in the formed natural rubber particles or powder.

12. A floor or wall covering, characterized in that A floor body comprising: granules for the preparation of a floor or wall covering according to any one of claims 1-5; and / or granules for the preparation of a floor or wall covering made according to the method of any one of claims 6-11.

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