PVC indoor wood-plastic floor

Abstract

The invention discloses a PVC (polyvinyl chloride) indoor wood-plastic floor. The PVC indoor wood-plastic floor comprises a PVC indoor wood-plastic floor base material, wherein the PVC indoor wood-plastic floor base material comprises the following components in parts by weight: 100 parts of polyvinyl chloride; 6-10 parts of an environment-friendly stabilizer; 50 to 200 parts of biomass powder; 50 to 200 parts of an inorganic filler; 2-5 parts of a lubricant; 3 to 10 parts of a toughening agent; 1-5 parts of a processing aid; and 1-4 parts of a coupling agent. According to the invention, the biomass powder and the inorganic filler are added into the raw materials by a worker, the materials have the characteristics of low density, reproducibility, degradability, low price and easiness in obtaining, the biomass organic material has better compatibility with PVC, and compared with calcium carbonate, the PVC composite material can be endowed with better mechanical properties and lower density; after the bamboo powder biomass material is properly modified, the processed PVC wood-plastic floor has better mechanical properties, lower density and better environmental friendliness, and then the floor of the required specification and model is produced by adding the dry blend into a hopper of an SJ110 / 220 cone double-floor extruder.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of polymer forming and processing, in particular to a PVC indoor wood-plastic floor. BACKGROUND

[0002] At present, PVC floors are widely used in our life. Common ones are SPC, LVT and WPC floors, which are widely used in homes, shopping malls, hotels, hospitals and other places. These floors are mainly produced from PVC resin and calcium carbonate raw materials, and generally do not contain bamboo and wood powder, crop straw natural biomass materials. These materials have the characteristics of low density, renewable, degradable, low price and easy to obtain. The compatibility of biomass organic materials with PVC is better, and compared with calcium carbonate, it can give PVC composite materials better mechanical properties and lower density. After proper modification, the PVC wood-plastic floor processed from bamboo and wood powder biomass materials has better mechanical properties, lower density and better environmental friendliness, which is specifically manifested in the following aspects: (1) The existing indoor wood-plastic floor mainly uses PVC resin and calcium carbonate, and only a small amount of bamboo and wood powder, which leads to non-degradable and non-renewable production raw materials, low mechanical properties of wood-plastic floor, and thus reduces the environmental friendliness of wood-plastic floor production; (2) When the molten glue is mixed and extruded, the temperature of the molten glue decreases directly due to the constant temperature in the extruder, which affects the quality of material melting and cooling speed, thereby reducing the working quality of material mixing and the speed of material forming and cooling; (3) After the wood-plastic floor is produced, only simple physical and chemical performance detection can be carried out on the wood-plastic floor, and the fusion density of the wood-plastic material layer cannot be detected, thereby reducing the success rate of wood-plastic floor production. SUMMARY

[0003] The present application aims to provide a PVC indoor wood-plastic floor to solve the problems existing in the current wood-plastic floor preparation method as described in the background art, i.e. (1) the existing indoor wood-plastic floor mainly uses PVC resin and calcium carbonate, and only a small amount of bamboo and wood powder, which leads to non-degradable and non-renewable production raw materials, low mechanical properties of wood-plastic floor, and thus reduces the environmental friendliness of wood-plastic floor production; (2) when the molten glue is mixed and extruded, the temperature of the molten glue decreases directly due to the constant temperature in the extruder, which affects the quality of material melting and cooling speed, thereby reducing the working quality of material mixing and the speed of material forming and cooling; (3) after the wood-plastic floor is produced, only simple physical and chemical performance detection can be carried out on the wood-plastic floor, and the fusion density of the wood-plastic material layer cannot be detected, thereby reducing the success rate of wood-plastic floor production.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a PVC indoor wood-plastic floor, the components of the PVC indoor wood-plastic floor substrate include, by weight fraction: Polyvinyl chloride: 100 parts; Environmentally friendly stabilizer: 6-10 parts; Biomass powder: 50-200 parts; Inorganic filler: 50-200 parts; Lubricant: 2-5 parts; Toughening agent: 3-10 parts; Processing aid: 1-5 parts; Coupling agent: 1-4 parts.

[0005] Preferably, the polyvinyl chloride is ethylene method SG-5 resin powder, the average degree of polymerization is 1000-1050.

[0006] Preferably, the environmentally friendly stabilizer is calcium zinc stabilizer, the inorganic filler is calcium carbonate, talc, wollastonite, calcium sulfate whisker, the mesh number is 300-2000 mesh.

[0007] Preferably, the biomass powder is wood powder, bamboo powder, rice husk powder, the mesh number is 50-200 mesh, the lubricant is one and more of monoglyceride, stearic acid, polyethylene wax and ethylene oxide wax.

[0008] Preferably, the toughening agent is one and more of ACR, MBS and CPE, the processing aid is one and more of ACR and SAN type processing aid, the coupling agent is one and more of silane coupling agent, phthalate coupling agent and aluminate coupling agent.

[0009] A preparation method of PVC indoor wood-plastic floor, comprising the following steps: Step one: dry the biomass materials of rice husk powder, wood powder and bamboo powder with a dryer, the drying temperature of the dryer is 110℃, the drying time is 4h, and the moisture content is controlled to be not more than 1%; Step two: mix the dried biomass powder with 1-2% coupling agent in a high-speed mixer, the stirring speed of high-speed mixing is 1200-1500 revolutions per minute, and the stirring time is 8-15 minutes, then mix the coupled biomass powder, PVC resin, calcium zinc stabilizer, inorganic powder and other additives uniformly in a high-low mixer group, and transfer the mixed material into a cooling mixer to cool to 40-50℃; Step three: put the dry mixed material into a PVC floor extrusion production line, feed the mixed material into a banbury mixer for high temperature and high pressure plasticization, then send the molten material into an extruder for melting and plasticization, then form the molten embryo through a sheet mold, set the thickness on a five-roller mechanism, hot press composite with wear-resistant layer and printed decorative film, process the wear-resistant layer through an embossing roller, and finally cool, pull and cut; Step 4: Then, according to production needs, PVC wood-plastic flooring is processed into different thicknesses and lengths. Next, the surface of the wood-plastic flooring is treated with UV, and the surface of the composite sheet is embossed. Then, the sheet is fully cooled and cured by multiple cooling rollers. Then, the wide sheet is cut into the required width, and then precisely die-cut according to product specifications. A precise locking structure is milled on the edge of the board. Finally, the size, appearance and performance are sampled and inspected, and qualified products are packaged and put into storage.

[0010] Preferably, the PVC flooring extruder is model SJ110 / 220, with the following molding temperatures for each zone: Zone 1: 190±5℃, Zone 2: 190±5℃, Zone 3: 195±5℃, Zone 4: 185±5℃, Zone 5: 180±5℃, Zone 6: 170±5℃, and the confluence core temperature: 165±5℃.

[0011] Preferably, the temperature of the plate mold is 190±10℃.

[0012] Preferably, the main unit rotates at a speed of 15-25 r / min, and the feeding speed rotates at a speed of 12-20 r / min.

[0013] Compared with the prior art, the beneficial effects of the present invention are: This invention involves adding biomass powder and inorganic fillers to raw materials. These materials are characterized by low density, renewability, biodegradability, low price, and easy availability. Biomass organic materials have better compatibility with PVC and can give PVC composite materials better mechanical properties and lower density compared with calcium carbonate. After appropriate modification treatment, the PVC wood-plastic flooring made from bamboo and wood powder biomass materials has better mechanical properties, lower density, and better environmental friendliness.

[0014] This invention produces flooring of the desired specifications by adding dry-mixed materials to the hopper of an SJ110 / 220 conical double-sided flooring extruder. The specific extrusion process is as follows: extrusion zone 1 temperature 190±5℃, zone 2 temperature 190±5℃, zone 3 temperature 195±5℃, zone 4 temperature 190±5℃, zone 5 temperature 185±5℃, zone 6 temperature 180±5℃, confluence core temperature 165±5℃, and die temperature 190±10℃. The main extruder speed is 15-20 r / min, and the feed speed is 12-18 r / min. After online coating with a printed film and a PVC wear-resistant layer, the semi-finished flooring of the desired specifications is produced. This facilitates the staged cooling of the molten material, improving the quality of the extruded molten material.

[0015] After production, workers use measuring instruments to check the length, width, and thickness of the flooring. Then, the density of the flooring is tested using the drainage method. Next, a universal testing machine is used to test the bending resistance, impact resistance, hardness, and abrasion resistance of the template. Then, an environmental simulation chamber is used to test the formaldehyde release, heavy metal content, and weather resistance of the flooring. Finally, the flame retardancy and water resistance of the flooring are tested. Infrared rays are used to uniformly scan the flooring, which can detect whether the flooring raw materials are mixed evenly, thus reducing the defect rate of flooring production. Attached Figure Description

[0016] Fig. 1 This is a composition diagram of the PVC indoor wood-plastic flooring used in this invention; Fig. 2 This is a partial operational logic code diagram of the extruder in this invention; Fig. 3 The values ​​in this invention are the average values ​​obtained from testing five samples from the same batch. This is a comparison chart of test data from Examples 1-3 and conventional SPC flooring. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figs. 1-3 The present invention provides a technical solution: a PVC indoor wood-plastic flooring. Example

[0019] Each component is expressed in parts by weight: Polyvinyl chloride SG-5 type: 100 parts; Calcium and zinc stabilizer: 7 parts; Calcium carbonate: 200 parts; Rice husk powder 2% KH550 coupling treatment: 100 parts; Monoglycerides: 1.5 parts; PE wax: 1.5 parts; Oxidized polyethylene wax: 0.3 parts; MBS-564: 5 copies; ACR processing aid: 2 parts; Example

[0020] Polyvinyl chloride SG-5: 100 parts; Calcium and zinc stabilizer: 8 parts; Stearic acid: 1.6 parts; PE wax: 1.5 parts; Calcium carbonate: 180 parts; Wood flour 2% KH550 coupling treatment: 120 parts; CPE: 8 parts; SAN processing aids: 1.5 parts; Example

[0021] Polyvinyl chloride SG-5: 100 parts; Calcium and zinc stabilizer: 8 parts; Calcium sulfate whiskers: 100 parts; Bamboo powder 2% phthalate coupling treatment: 100 parts; Monoglycerides: 1.4 parts; Oxidized wax: 0.4 parts; PE wax: 1.4 parts; ACR-401: 6 copies; 1 part ACR processing aid.

[0022] In this embodiment: the polyvinyl chloride is SG-5 type resin powder produced by ethylene method or calcium carbide method, with an average degree of polymerization of 1000-1100, and the polyvinyl chloride is SG-5 resin powder produced by ethylene method, with an average degree of polymerization of 1000-1050.

[0023] In this embodiment: the environmentally friendly stabilizer is a non-toxic and transparent stabilizer, mainly including one or more of calcium-zinc stabilizers and rare earth calcium-zinc stabilizers. The environmentally friendly stabilizer is a calcium-zinc stabilizer, and the inorganic filler is calcium carbonate, talc, wollastonite, or calcium sulfate whiskers with a mesh size of 300-2000 mesh.

[0024] In this embodiment: the biomass powder is wood powder, bamboo powder, or rice husk powder, with a mesh size of 50-200 mesh; the lubricant is one or more of monoglycerides, stearic acid, polyethylene wax, and ethylene oxide wax.

[0025] In this embodiment: the toughening agent is one or more of ACR, MBS and CPE, the processing aid is one or more of ACR and SAN-type processing aids, and the coupling agent is one or more of silane coupling agents, phthalate coupling agents and aluminate coupling agents.

[0026] A method for preparing PVC indoor wood-plastic composite flooring includes the following steps: Step 1: Dry the rice husk powder, wood powder, and bamboo biomass materials using a dryer. The dryer temperature is 110℃, and the drying time is 4 hours. The moisture content is controlled to not exceed 1%. Before mixing the raw materials, the rice husk powder, wood powder, and bamboo biomass materials are dried using a dryer at 110℃ for 4 hours. The moisture content is controlled to not exceed 1% to ensure the dryness of the raw materials, which facilitates the mixing of materials and improves the quality of the raw material mixture. Step 2: Mix the dried biomass powder with 1-2% coupling agent in a high-speed mixer at a speed of 1200-1500 rpm for 8-15 minutes. Then, mix the coupled biomass powder, PVC resin, calcium-zinc stabilizer, inorganic powder, and other additives in a high-low mixing unit. Transfer the mixture to a cooling mixer to cool it to 40-50℃. First, the dried biomass powder is mixed with 1-2% coupling agent in a high-speed mixer. After weighing all the raw materials, they are mixed evenly in a high-low mixing unit at a speed of 1500 rpm for 15 minutes. Then, the coupled biomass powder, PVC resin, calcium-zinc stabilizer, inorganic powder, and other additives are mixed evenly in a high-low mixing unit. The discharge temperature is 115℃, and the discharge temperature is 45℃. This ensures that the materials are mixed evenly and improves the quality of subsequent melting. Step 3: The dry mixture is fed into the PVC flooring extrusion production line. The mixture is fed into the internal mixer for high-temperature and high-pressure plasticization. Then, the molten rubber is fed into the extruder for melting and plasticization. Then, the melt blank is formed through the sheet mold, and the thickness is fixed on the five-roll mechanism. It is then hot-pressed and laminated with the wear-resistant layer and printed decorative film. The wear-resistant layer is embossed by the embossing roller. Finally, it is cooled, drawn, and cut. The dry mixture is then added to the hopper of the SJ110 / 2205 conical double flooring extruder to produce the flooring of the required specifications and models. The specific extrusion process is as follows: Extrusion zone 1 temperature 190±5℃, zone 2 temperature 190±5℃, zone 3 temperature 195±5℃, zone 4 temperature 190±5℃, zone 5 temperature 185±5℃, zone 6 temperature 180±5℃, confluence core temperature 165±5℃, and die temperature 190±10℃. The main machine rotates at 15-20 r / min, the feeding speed is 12-18 r / min, and then the printed film and PVC wear-resistant layer are applied online to produce the required specifications of flooring semi-finished products. This facilitates the staged cooling of the molten material and improves the quality of the molten material extrusion. Step Four: Then, according to production needs, PVC wood-plastic composite flooring is processed into different thicknesses and lengths. Next, the sheets undergo UV treatment, and the surface of the laminated sheets is embossed. Then, the sheets are fully cooled and cured using multi-segment cooling rollers. The wide sheets are then cut to the required width and precisely die-cut according to product specifications. A precise interlocking structure is milled along the edges of the sheets. Finally, size, appearance, and performance are randomly inspected. Qualified products are packaged and stored. The semi-finished flooring from the extruder hopper is further processed. The surface of the laminated sheets is embossed, and then the sheets are fully cooled and cured using multi-segment cooling rollers. Wide sheets are cut to the required width and then precisely die-cut according to product specifications. Precise interlocking structures are milled on the edges of the sheets. After production, workers use measuring instruments to check the length, width, and thickness. Then, the density of the flooring is tested using the drainage method. Next, a universal testing machine is used to test the bending resistance, impact resistance, hardness, and abrasion resistance of the template. Then, an environmental simulation chamber is used to test the formaldehyde release, heavy metal content, and weather resistance of the flooring. Finally, the flame retardancy and water resistance of the flooring are tested. Infrared rays are used to uniformly scan the flooring to detect whether the raw materials are mixed evenly, thus reducing the defect rate in flooring production.

[0027] In this embodiment: the PVC floor extruder model is SJ110 / 220, and the molding temperatures of each zone are: Zone 1 temperature 190±5℃, Zone 2 temperature 190±5℃, Zone 3 temperature 195±5℃, Zone 4 temperature 185±5℃, Zone 5 temperature 180±5℃, Zone 6 temperature 170±5℃, and the confluence core temperature 165±5℃.

[0028] In this embodiment, the temperature of the sheet metal mold is 190±10℃.

[0029] In this embodiment: the main unit speed is 15-25 r / min, and the feeding speed is 12-20 r / min.

[0030] In summary, Examples 1, 2, and 3 demonstrate that by adding biomass powder and inorganic fillers to the raw materials, the workers can achieve better results. These materials are characterized by low density, renewability, biodegradability, low price, and easy availability. Biomass organic materials have better compatibility with PVC and, compared to calcium carbonate, can impart better mechanical properties and lower density to PVC composite materials. After appropriate modification, bamboo and wood powder biomass materials can be processed into PVC wood-plastic flooring with better mechanical properties, lower density, and greater environmental friendliness.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A PVC indoor wood-plastic composite flooring, comprising: The components of the PVC indoor wood-plastic flooring substrate, by weight, are as follows: Polyvinyl chloride: 100 parts; Environmentally friendly stabilizer: 6-10 parts; Biomass powder: 50-200 parts; Inorganic filler: 50-200 parts; Lubricant: 2-5 parts; Toughening agent: 3-10 parts; Processing aids: 1-5 parts; Coupling agent: 1 to 4 parts.

2. The PVC indoor wood-plastic composite flooring according to claim 1, characterized in that: The polyvinyl chloride is SG-5 resin powder produced by the ethylene method, with an average degree of polymerization of 1000-1050.

3. The PVC indoor wood-plastic composite flooring according to claim 1, characterized in that: The environmentally friendly stabilizer is a calcium-zinc stabilizer, and the inorganic filler is calcium carbonate, talc, wollastonite, or calcium sulfate whiskers with a mesh size of 300-2000 mesh.

4. The PVC indoor wood-plastic composite flooring according to claim 1, characterized in that: The biomass powder is wood powder, bamboo powder, or rice husk powder, with a mesh size of 50-200 mesh. The lubricant is one or more of monoglycerides, stearic acid, polyethylene wax, and ethylene oxide wax.

5. A PVC indoor wood-plastic composite flooring according to claim 1, characterized in that: The toughening agent is one or more of ACR, MBS and CPE, the processing aid is one or more of ACR and SAN-type processing aids, and the coupling agent is one or more of silane coupling agents, phthalate coupling agents and aluminate coupling agents.

6. A method for preparing PVC indoor wood-plastic composite flooring, based on the PVC indoor wood-plastic composite flooring according to any one of claims 1-5, characterized in that, Includes the following steps: Step 1: Dry the rice husk powder, wood powder, and bamboo biomass materials using a dryer. The dryer temperature is 110℃, the drying time is 4 hours, and the moisture content is controlled to not exceed 1%. Step 2: Mix the dried biomass powder with 1-2% coupling agent in a high-speed mixer. The stirring speed of the high-speed mixer is 1200-1500 rpm, and the stirring time is 8-15 minutes. Then, mix the coupled biomass powder, PVC resin, calcium-zinc stabilizer, inorganic powder and other additives evenly in a high-low mixing unit. Transfer the mixture to a cooling mixer to cool it down to 40-50℃. Step 3: The dry mixture is fed into the PVC flooring extrusion production line. The mixture is fed into the internal mixer for high temperature and high pressure plasticization. Then the molten rubber is fed into the extruder for melting and plasticization. Then the melt blank is formed through the sheet mold, the thickness is fixed on the five-roll mechanism, and it is hot-pressed and laminated with the wear-resistant layer and printed decorative film. The wear-resistant layer is embossed by the embossing roller. Finally, it is cooled, drawn and cut. Step 4: Then, according to production needs, PVC wood-plastic flooring is processed into different thicknesses and lengths. Next, the surface of the wood-plastic flooring is treated with UV, and the surface of the composite sheet is embossed. Then, the sheet is fully cooled and cured by multiple cooling rollers. Then, the wide sheet is cut into the required width, and then precisely die-cut according to product specifications. A precise locking structure is milled on the edge of the board. Finally, the size, appearance and performance are sampled and inspected, and qualified products are packaged and put into storage.

7. The method for preparing PVC indoor wood-plastic composite flooring according to claim 6, characterized in that: The PVC flooring extruder model is SJ110 / 220, and the molding temperatures of each zone are as follows: Zone 1: 190±5℃, Zone 2: 190±5℃, Zone 3: 195±5℃, Zone 4: 185±5℃, Zone 5: 180±5℃, Zone 6: 170±5℃, and the confluence core temperature is 165±5℃.

8. The method for preparing PVC indoor wood-plastic composite flooring according to claim 6, characterized in that: The temperature of the plate mold is 190±10℃.

9. The method for preparing PVC indoor wood-plastic composite flooring according to claim 6, characterized in that: The main unit rotates at 15-25 r / min, and the feeding speed is 12-20 r / min.

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