CN103758339B - Wood plastic composite material veneering plywood and manufacturing method and application thereof - Google Patents
Wood plastic composite material veneering plywood and manufacturing method and application thereof Download PDFInfo
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- CN103758339B CN103758339B CN201410057895.2A CN201410057895A CN103758339B CN 103758339 B CN103758339 B CN 103758339B CN 201410057895 A CN201410057895 A CN 201410057895A CN 103758339 B CN103758339 B CN 103758339B
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Abstract
The invention relates to plywood and a manufacturing method of the plywood, and discloses wood plastic composite material veneering plywood and a manufacturing method and application of the wood plastic composite material veneering plywood. The wood plastic composite material veneering plywood aims to solve the problems that when wooden plywood manufactured according to an existing method is used, a die swells easily, the die is released difficultly, the number of turnover using times is small, and the wood plastic composite board cannot be easily used as a building formwork independently. The wood plastic composite material veneering plywood is formed by a wood plastic composite sheet, a non-woven fabric, wood plywood and adhesives in a manufactured mode. The manufacturing method comprises the steps that the wood plastic composite sheet is manufactured; a non-woven fabric cladding wood plastic composite material is manufactured; the plywood is preprocessed; the adhesives are coated; pre-pressing is carried out; hot pressing is carried out. The wood plastic composite material veneering plywood can be used as the building formwork. The wood plastic composite material veneering plywood has the advantages that the formwork and concrete are separated easily, a casting surface is flat and smooth, and labor intensity of die unloading is relieved; the number of turnover using times of the formwork is improved to be 50-70; weight is light and intensity is high.
Description
Technical field
The present invention relates to a kind of glued board and preparation method thereof.
Background technology
Building template is a kind of important construction tool in current Cast-in-situ Concrete Structural Engineering, and Wood construction formwork relies on the features such as its breadth is large, piece is few, process from heavy and light, easily, integral rigidity is good, the dark favor being subject to domestic and international builder and contractor.But Wood construction formwork causes its in use easy swollen mould, demoulding difficulty due to the characteristic of material itself, and turnover access times only have about 10 times usually, easy loss, life-span are short, and cause use amount large, cost improves.
Wood plastic composite (WPC) is the composite utilizing wood fibre and thermoplastics processing, its raw material can be the biomass fibers such as waste and old wood, agricultural crop straw, bamboo wood, hards, the thermoplastic such as polyethylene, polypropylene, polyvinyl chloride reclaimed, the regeneration for discarded object provides good approach.Wood plastic composite, as a kind of advanced composite material (ACM) of environmental protection, has good corrosion resistance and dimensional stability.In addition, the polyolefin inactive surfaces of wood and plastic composite makes the easily demoulding after cement solidification, wall surface levelling.But the rigidity of wood plastic composite and toughness comparatively timber are poor, especially TPO wood plastic composite, as using it separately as building template materials'use, there is stressed and yielding in situation, position, the material crisp corner easily problem such as damaged of being heated.In addition, wood plastic composite proportion is comparatively large, operates to transport and use and causes difficulty.
In use there is easy swollen mould, demoulding difficulty in existing wooden plywood template, turnover access times are few and wood-plastic composite panel is more difficult separately as the shortcoming that building template uses.
Summary of the invention
The object of the invention is to solve wooden plywood prepared by existing method in use easy swollen mould, demoulding difficulty, turnover access times are few and wood-plastic composite panel is more difficult separately as the problem that building template uses, and provide a kind of wood plastic composite veneered plywood and preparation method thereof.
A kind of wood plastic composite veneered plywood is prepared from by wood plastics composite sheet material, non-woven fabrics, wooden plywood and adhesive.
A kind of preparation method of wood plastic composite veneered plywood completes according to the following steps:
One, wood plastics composite sheet material is prepared:
1., 30 parts ~ 100 parts thermoplastics, 20 parts ~ 200 parts string powders, 20 parts ~ 100 parts inorganic fillers, 3 parts ~ 10 parts coupling agents, 1 part ~ 4 parts lubricants, 1 part ~ 4 parts Masterbatch and 3 parts ~ 10 parts other fillers are taken by mass fraction, then the thermoplastic taken, string powder, inorganic filler, coupling agent, lubricant, color masterbatch and other fillers are put into high-speed mixer and carry out premix, control temperature is 25 DEG C ~ 150 DEG C, do time as 5min ~ 20min in advance, then naturally cool, obtain premix;
2., by premix carry out extrusion molding in an extruder, obtain the wood plastics composite sheet material that thickness is 0.5mm ~ 5mm;
Step one 1. described in the particle diameter of string powder be 80 μm ~ 2000 μm;
Step one 1. described in inorganic filler be the mixture of one or more in calcium carbonate, talcum powder, kaolin, mica, wollastonite and barium sulfate;
Step one 1. described in lubricant be the mixture of one or more in stearic acid, Metallic stearates, paraffin, Tissuemat E and polypropylene wax;
Step one 1. described in other fillers be one or more mixtures in inorganic mineral filler, antioxidant, light stabilizer, anti-ultraviolet aging agent and fire retardant;
Two, the wood plastic composite of non-woven fabrics clad can is prepared: when the non-woven fabrics after wood plastics composite sheet material leaves extruder die orifice by thickness being 0.01mm ~ 0.5mm overlays in the wood plastics composite sheet surface that thickness is 0.5mm ~ 5mm, temperature be 100 DEG C ~ 160 DEG C with pressure be under the condition of 0.1MPa ~ 1MPa, non-woven fabrics is pressed to wood plastics composite sheet material together with, obtain the wood plastic composite that thickness is the non-woven fabrics clad can of 0.5mm ~ 5.5mm after cooling;
The raw material of the non-woven fabrics described in step 2 is the composition of one or more in polypropylene, polyethylene, PETG, polyurethane and polyvinyl chloride;
Three, glued board pretreatment: use sander to carry out sanding process to the upper surface of wooden plywood and lower surface, obtain ganoid wooden plywood;
Wooden plywood described in step 3 is the ageing-resistant glued board of outdoor stages;
Four, gluing: by 100g/m
2~ 300g/m
2glue-spread adhesive is coated on the non-woven fabrics that thickness is the wood plastic composite of the non-woven fabrics clad can of 0.5mm ~ 5.5mm, place 15min ~ 30min at ambient temperature, obtain the wood plastic composite of non-woven fabrics clad can after gluing;
Adhesive described in step 4 is the mixture of one or more in phenolic resin adhesive, cyanurotriamide modified urea resin adhesive, adhesive for polyurethane and epoxy resin adhesive;
Five, precompressed: the wood plastic composite of non-woven fabrics clad can after two gluings is overlayed on the upper and lower surface of ganoid wooden plywood respectively, the non-woven fabrics of gluing is contacted with glued board, precompressed 10min ~ 15min under room temperature and pressure are the condition of 1MPa ~ 3MPa, obtains the wood plastic composite veneered plywood of precompressed;
Six, hot pressing: be 90 DEG C ~ 150 DEG C and pressure by the wood plastic composite veneered plywood of precompressed in temperature be hot pressing 5min ~ 25min in the hot press of 1MPa ~ 6MPa, obtains wood plastic composite veneered plywood.
A kind of wood plastic composite veneered plywood uses as building template.
The present invention extrudes through extruder after blended for the raw materials such as string powder, thermoplastic, obtain wood plastic composite sheet material, its one side is covered with non-woven fabrics, and then with adhesive by the upper and lower faces of non-woven fabrics clad can wood plastics composite sheet attaching in wooden plywood.Wooden plywood surface is polarity, and wood plastics composite sheet surface is nonpolar and unusual light, without permeability, poor compatibility therebetween, is difficult to adopt conventional gluing technique to glue together; The invention solves this key technical problem, adopt non-woven fabrics as middle dielectric layer, utilize non-woven fabrics identical with surface of wood-plastic composite material polarity, it is firmly attached on wood by heat under pressure and moulds sheet surface; The homogeneous texture of non-woven fabrics is conducive to large format and evenly applies adhesive, and thin fibril is conducive to the infiltration of adhesive and forms glue nail, improves the bonding strength between glued board and wooden plastic sheet material; Also can carry out coupling agent grafting process to non-woven fabrics, improve the bonding strength between polarity timber and non-polar plastic further; Adhesive is coated on non-woven fabrics, displays to be conducive to moisture and to distribute after glue, avoids, during hot pressing, bubbling lamination occurs; After assembly, precompressed is conducive to adhesive in the infiltration of face veneer and infiltration, improves bonding strength.
Advantage of the present invention: one, the present invention obtains the purposes of the wooden plywood of wood plastic composite veneer is use as building template, utilize that surface of wood-plastic composite material polyolefin layer surface energy is low, thermal coefficient of expansion differs larger characteristic with concrete, reduce along with temperature and concretely to solidify, wood plastic composite veneered plywood is easily separated with concrete, need not beat and can take off gently, reduce labour intensity;
Two, concrete surface smooth and beautiful appearance, can reach dry wall requirement after cast, deducts wall secondary plastering technique, can direct faced deorative, reduces the duration.And template turnover access times are 50 times ~ 70 times, improve more than 4 times than normal plywood template, also thus reduce the use cost of template;
Three, the wood plastic composite on surface has protective effect to wooden plywood, makes it not cracky, moisture absorption, expansion; Wood plastic composite veneered plywood overall weight reduces, easy construction.Adopt the good polyolefine wood-plastic composite wood of heat resistance to coordinate the wood materials that heat-insulating property is good, wood plastic composite veneered plywood heat resistance improves, not yielding;
Four, adopt non-woven fabrics as intermediate medium, solve poor compatibility between non-polar plastic surface and polarity wood surface, be difficult to the problem of gluing together.
Five, the present invention takes full advantage of the excellent surface property of wood plastic composite and the higher rigidity of wood materials, by glueing joint, bi-material is carried out compound, take into account the advantage of bi-material, widened the range of application of wood plastic composite in building material field simultaneously, increase template turnover access times, reduce the single use cost of template.
Detailed description of the invention
Detailed description of the invention one: this detailed description of the invention is that a kind of wood plastic composite veneered plywood is prepared from by wood plastics composite sheet material, non-woven fabrics, wooden plywood and adhesive.
The advantage of present embodiment: the purposes of the wooden plywood of wood plastic composite veneer that, present embodiment obtains uses as building template, utilize that surface of wood-plastic composite material polyolefin layer surface energy is low, thermal coefficient of expansion differs larger characteristic with concrete, reduce along with temperature and concretely to solidify, wood plastic composite veneered plywood is easily separated with concrete, need not beat and can take off gently, reduce labour intensity;
Two, concrete surface smooth and beautiful appearance, can reach dry wall requirement after cast, deducts wall secondary plastering technique, can direct faced deorative, reduces the duration.And template turnover access times are 50 times ~ 70 times, improve more than 4 times than normal plywood template, also thus reduce the use cost of template;
Three, the wood plastic composite on surface has protective effect to wooden plywood, makes it not cracky, moisture absorption, expansion; Wood plastic composite veneered plywood overall weight reduces, easy construction.Adopt the good polyolefine wood-plastic composite wood of heat resistance to coordinate the wood materials that heat-insulating property is good, wood plastic composite veneered plywood heat resistance improves, not yielding;
Four, adopt non-woven fabrics as intermediate medium, solve poor compatibility between non-polar plastic surface and polarity wood surface, be difficult to the problem of gluing together.
Five, present embodiment takes full advantage of the excellent surface property of wood plastic composite and the higher rigidity of wood materials, by glueing joint, bi-material is carried out compound, take into account the advantage of bi-material, widened the range of application of wood plastic composite in building material field simultaneously, increase template turnover access times, reduce the single use cost of template.
Detailed description of the invention two: present embodiment and detailed description of the invention one difference are: described wood plastics composite sheet material is prepared according to the following steps:
Step one, take 30 parts ~ 100 parts thermoplastics, 20 parts ~ 200 parts string powders, 20 parts ~ 100 parts inorganic fillers, 3 parts ~ 10 parts coupling agents, 1 part ~ 4 parts lubricants, 1 part ~ 4 parts Masterbatch and 3 parts ~ 10 parts other fillers by mass fraction, then the thermoplastic taken, string powder, inorganic filler, coupling agent, lubricant, color masterbatch and other fillers are put into high-speed mixer and carry out premix, control temperature is 25 DEG C ~ 150 DEG C, do time as 5min ~ 20min in advance, then naturally cool, obtain premix;
Step 2, premix is carried out extrusion molding in an extruder, obtain the wood plastics composite sheet material that thickness is 0.5mm ~ 5mm;
Extrusion molding described in step 2 comprises following two kinds of methods, method one: be 140 DEG C ~ 210 DEG C and rotating speed by premix at each barrel zone temperature be melting mixing granulation in the double screw extruder of 30r/min ~ 100r/min, obtain wood plastic composite pellet, wood plastic composite pellet to be joined each barrel zone temperature be 140 DEG C ~ 200 DEG C and rotating speed is again extrude in the single screw extrusion machine of 10r/min ~ 100r/min, control mold temperature 140 DEG C ~ 200 DEG C and die orifice roll-in gap, obtain the wood plastics composite sheet material that thickness is 0.5mm ~ 5mm;
Method two: the double screw extruder that to use each barrel zone temperature to be 140 DEG C ~ 210 DEG C and rotating speed be 10r/min ~ 100r/min is by premix direct extrusion molding, control mold temperature 140 DEG C ~ 210 DEG C and die orifice roll-in gap, obtain the wood plastics composite sheet material that thickness is 0.5mm ~ 5mm;
Thermoplastic described in step one is the one or more combination thing in polyethylene, polypropylene, polyvinyl chloride, polystyrene and polyamide;
String powder described in step one is the mixture of one or more in wood powder, bamboo powder, agricultural residues powder, shell powder, bagasse and powdered rice hulls; Described agricultural residues powder is corn stalk powder, wheat stalk powder, rice straw powder, soybean stalk powder or broomcorn straw powder;
The particle diameter of the string powder described in step one is 80 μm ~ 2000 μm;
Inorganic filler described in step one is the mixture of one or more in calcium carbonate, talcum powder, kaolin, mica, wollastonite and barium sulfate;
Coupling agent described in step one is the mixture of one or more in maleic anhydride stem grafting polyolefin, titanate esters, isocyanates, HMDS, HMDO, aminopropyl triethoxysilane and methacryloxypropyl trimethoxy silane;
Lubricant described in step one is the mixture of one or more in stearic acid, Metallic stearates, paraffin, Tissuemat E and polypropylene wax;
Other fillers described in step one are one or more mixtures in inorganic mineral filler, antioxidant, light stabilizer, anti-ultraviolet aging agent and fire retardant.Other steps are identical with detailed description of the invention one.
Detailed description of the invention three: one of present embodiment and detailed description of the invention one or two difference is: the raw material of described non-woven fabrics is the composition of one or more in polypropylene, polyethylene, PETG, polyurethane and polyvinyl chloride, the thickness of non-woven fabrics is 0.01mm ~ 0.5mm; Described wooden plywood is the ageing-resistant glued board of outdoor stages.Other steps are identical with detailed description of the invention one or two.
Detailed description of the invention four: one of present embodiment and detailed description of the invention one to three difference is: described adhesive is the mixture of one or more in phenolic resin adhesive, cyanurotriamide modified urea resin adhesive, adhesive for polyurethane and epoxy resin adhesive.Other steps are identical with detailed description of the invention one to three.
Detailed description of the invention five: present embodiment is that a kind of preparation method of wood plastic composite veneered plywood completes according to the following steps:
One, wood plastics composite sheet material is prepared:
1., 30 parts ~ 100 parts thermoplastics, 20 parts ~ 200 parts string powders, 20 parts ~ 100 parts inorganic fillers, 3 parts ~ 10 parts coupling agents, 1 part ~ 4 parts lubricants, 1 part ~ 4 parts Masterbatch and 3 parts ~ 10 parts other fillers are taken by mass fraction, then the thermoplastic taken, string powder, inorganic filler, coupling agent, lubricant, color masterbatch and other fillers are put into high-speed mixer and carry out premix, control temperature is 25 DEG C ~ 150 DEG C, do time as 5min ~ 20min in advance, then naturally cool, obtain premix;
2., by premix carry out extrusion molding in an extruder, obtain the wood plastics composite sheet material that thickness is 0.5mm ~ 5mm;
Step one 1. described in the particle diameter of string powder be 80 μm ~ 2000 μm;
Step one 1. described in inorganic filler be the mixture of one or more in calcium carbonate, talcum powder, kaolin, mica, wollastonite and barium sulfate;
Step one 1. described in lubricant be the mixture of one or more in stearic acid, Metallic stearates, paraffin, Tissuemat E and polypropylene wax;
Step one 1. described in other fillers be one or more mixtures in inorganic mineral filler, antioxidant, light stabilizer, anti-ultraviolet aging agent and fire retardant;
Two, the wood plastic composite of non-woven fabrics clad can is prepared: when the non-woven fabrics after wood plastics composite sheet material leaves extruder die orifice by thickness being 0.01mm ~ 0.5mm overlays in the wood plastics composite sheet surface that thickness is 0.5mm ~ 5mm, temperature be 100 DEG C ~ 160 DEG C with pressure be under the condition of 0.1MPa ~ 1MPa, non-woven fabrics is pressed to wood plastics composite sheet material together with, obtain the wood plastic composite that thickness is the non-woven fabrics clad can of 0.5mm ~ 5.5mm after cooling;
The raw material of the non-woven fabrics described in step 2 is the composition of one or more in polypropylene, polyethylene, PETG, polyurethane and polyvinyl chloride;
Three, glued board pretreatment: use sander to carry out sanding process to the upper surface of wooden plywood and lower surface, obtain ganoid wooden plywood;
Wooden plywood described in step 3 is the ageing-resistant glued board of outdoor stages;
Four, gluing: by 100g/m
2~ 300g/m
2glue-spread adhesive is coated on the non-woven fabrics that thickness is the wood plastic composite of the non-woven fabrics clad can of 0.5mm ~ 5.5mm, place 15min ~ 30min at ambient temperature, obtain the wood plastic composite of non-woven fabrics clad can after gluing;
Adhesive described in step 4 is the mixture of one or more in phenolic resin adhesive, cyanurotriamide modified urea resin adhesive, adhesive for polyurethane and epoxy resin adhesive;
Five, precompressed: the wood plastic composite of non-woven fabrics clad can after two gluings is overlayed on the upper and lower surface of ganoid wooden plywood respectively, the non-woven fabrics of gluing is contacted with glued board, precompressed 10min ~ 15min under room temperature and pressure are the condition of 1MPa ~ 3MPa, obtains the wood plastic composite veneered plywood of precompressed;
Six, hot pressing: be 90 DEG C ~ 150 DEG C and pressure by the wood plastic composite veneered plywood of precompressed in temperature be hot pressing 5min ~ 25min in the hot press of 1MPa ~ 6MPa, obtains wood plastic composite veneered plywood.
The advantage of present embodiment: the purposes of the wooden plywood of wood plastic composite veneer that, present embodiment obtains uses as building template, utilize that surface of wood-plastic composite material polyolefin layer surface energy is low, thermal coefficient of expansion differs larger characteristic with concrete, reduce along with temperature and concretely to solidify, wood plastic composite veneered plywood is easily separated with concrete, need not beat and can take off gently, reduce labour intensity;
Two, concrete surface smooth and beautiful appearance, can reach dry wall requirement after cast, deducts wall secondary plastering technique, can direct faced deorative, reduces the duration.And template turnover access times are 50 times ~ 70 times, improve more than 4 times than normal plywood template, also thus reduce the use cost of template;
Three, the wood plastic composite on surface has protective effect to wooden plywood, makes it not cracky, moisture absorption, expansion; Wood plastic composite veneered plywood overall weight reduces, easy construction.Adopt the good polyolefine wood-plastic composite wood of heat resistance to coordinate the wood materials that heat-insulating property is good, wood plastic composite veneered plywood heat resistance improves, not yielding;
Four, adopt non-woven fabrics as intermediate medium, solve poor compatibility between non-polar plastic surface and polarity wood surface, be difficult to the problem of gluing together.
Five, present embodiment takes full advantage of the excellent surface property of wood plastic composite and the higher rigidity of wood materials, by glueing joint, bi-material is carried out compound, take into account the advantage of bi-material, widened the range of application of wood plastic composite in building material field simultaneously, increase template turnover access times, reduce the single use cost of template.
Detailed description of the invention six: present embodiment and detailed description of the invention five difference are: step one 2. described in extrusion molding comprise following two kinds of methods, method one: be 140 DEG C ~ 210 DEG C and rotating speed by premix at each barrel zone temperature be melting mixing granulation in the double screw extruder of 30r/min ~ 100r/min, obtain wood plastic composite pellet, wood plastic composite pellet to be joined each barrel zone temperature be 140 DEG C ~ 200 DEG C and rotating speed is again extrude in the single screw extrusion machine of 10r/min ~ 100r/min, control mold temperature 140 DEG C ~ 200 DEG C and die orifice roll-in gap, obtain the wood plastics composite sheet material that thickness is 0.5mm ~ 5mm, method two: the double screw extruder that to use each barrel zone temperature to be 140 DEG C ~ 210 DEG C and rotating speed be 10r/min ~ 100r/min is by premix direct extrusion molding, control mold temperature 140 DEG C ~ 210 DEG C and die orifice roll-in gap, obtain the wood plastics composite sheet material that thickness is 0.5mm ~ 5mm.Other steps are identical with detailed description of the invention five.
Detailed description of the invention seven: one of present embodiment and detailed description of the invention five or six difference is: step one 1. described in thermoplastic be one or more combination thing in polyethylene, polypropylene, polyvinyl chloride, polystyrene and polyamide.Other steps are identical with detailed description of the invention five or six.
Detailed description of the invention eight: one of present embodiment and detailed description of the invention five to seven difference is: step one 1. described in string powder be the mixture of one or more in wood powder, bamboo powder, agricultural residues powder, shell powder, bagasse and powdered rice hulls; Described agricultural residues powder is corn stalk powder, wheat stalk powder, rice straw powder, soybean stalk powder or broomcorn straw powder.Other steps are identical with detailed description of the invention five to seven.
Detailed description of the invention nine: one of present embodiment and detailed description of the invention five to eight difference is: step one 1. described in coupling agent be the mixture of one or more in maleic anhydride stem grafting polyolefin, titanate esters, isocyanates, HMDS, HMDO, aminopropyl triethoxysilane and methacryloxypropyl trimethoxy silane.Other steps are identical with detailed description of the invention five to eight.
Detailed description of the invention ten: present embodiment is a kind of purposes of wood plastic composite veneered plywood is use as building template.
The advantage of present embodiment: the purposes of the wooden plywood of wood plastic composite veneer that, present embodiment obtains uses as building template, utilize that surface of wood-plastic composite material polyolefin layer surface energy is low, thermal coefficient of expansion differs larger characteristic with concrete, reduce along with temperature and concretely to solidify, wood plastic composite veneered plywood is easily separated with concrete, need not beat and can take off gently, reduce labour intensity;
Two, concrete surface smooth and beautiful appearance, can reach dry wall requirement after cast, deducts wall secondary plastering technique, can direct faced deorative, reduces the duration.And template turnover access times are 50 times ~ 70 times, improve more than 4 times than normal plywood template, also thus reduce the use cost of template;
Three, the wood plastic composite on surface has protective effect to wooden plywood, makes it not cracky, moisture absorption, expansion; Wood plastic composite veneered plywood overall weight reduces, easy construction.Adopt the good polyolefin composite wood of heat resistance to coordinate the wood materials that heat-insulating property is good, wood plastic composite veneered plywood heat resistance improves, not yielding;
Four, adopt non-woven fabrics as intermediate medium, solve poor compatibility between non-polar plastic surface and polarity wood surface, be difficult to the problem of gluing together.
Five, present embodiment takes full advantage of the excellent surface property of wood plastic composite and the higher rigidity of wood materials, by glueing joint, bi-material is carried out compound, take into account the advantage of bi-material, widened the range of application of wood plastic composite in building material field simultaneously, increase template turnover access times, reduce the single use cost of template.
Adopt following verification experimental verification beneficial effect of the present invention:
Test one: a kind of wood plastic composite veneered plywood is prepared from by wood plastics composite sheet material, non-woven fabrics, wooden plywood and adhesive.
In this test, wood plastics composite sheet material is prepared according to the following steps:
Step one, take 40 parts of thermoplastics, 30 parts of string powders, 20 parts of inorganic fillers, 4 parts of coupling agents, 1 part of lubricant, 1 part of Masterbatch and 3 parts of other fillers by mass fraction, then the thermoplastic taken, string powder, inorganic filler, coupling agent, lubricant, color masterbatch and other fillers are put into high-speed mixer and carry out premix, control temperature is 105 DEG C, do time as 15min in advance, then naturally cool, obtain premix;
Step 2, premix is carried out extrusion molding in an extruder, obtain the wood plastics composite sheet material that thickness is 1.5mm, the method of the extrusion molding described in this test procedure two is: premix is respectively 155 DEG C, a district at each barrel zone temperature, two 165 DEG C, districts, three 170 DEG C, districts, four 175 DEG C, districts, five 175 DEG C, districts, six 150 DEG C, DEG CHe seven district of districts 165 and rotating speed are melting mixing granulation in the double screw extruder of 50r/min, obtain wood plastic composite pellet, again wood plastic composite pellet is joined each barrel zone temperature and be respectively 165 DEG C, a district, two 165 DEG C, districts, three 170 DEG C, DEG CHe tetra-district of districts 170 and rotating speed are extrude in the single screw extrusion machine of 20r/min, control mold temperature 165 DEG C and die orifice roll-in gap, obtain the wood plastics composite sheet material that thickness is 1.5mm,
Thermoplastic described in this test procedure one is polypropylene;
String powder described in this test procedure one is Poplar Powder, and particle diameter is 180 μm ~ 2000 μm;
Inorganic filler described in this test procedure one is calcium carbonate, and particle diameter is 38 μm ~ 40 μm;
Coupling agent described in this test procedure one is maleic anhydride stem grafting polyolefin, and percent grafting is 1wt%;
Lubricant described in this test procedure one is paraffin;
Other fillers described in this test procedure one are the mixture of antioxidant, light stabilizer, anti-ultraviolet aging agent and fire retardant;
The raw material of the non-woven fabrics described in this test is polypropylene, and thickness is 0.05mm;
Wooden plywood described in this test is the ageing-resistant glued board of outdoor stages;
Adhesive described in this test is phenolic resin adhesive.
Test two: a kind of preparation method of wood plastic composite veneered plywood completes according to the following steps:
One, wood plastics composite sheet material is prepared:
1., 40 parts of thermoplastics, 30 parts of string powders, 20 parts of inorganic fillers, 4 parts of coupling agents, 1 part of lubricant, 1 part of Masterbatch and 3 parts of other fillers are taken by mass fraction, then the thermoplastic taken, string powder, inorganic filler, coupling agent, lubricant, color masterbatch and other fillers are put into high-speed mixer and carry out premix, control temperature is 105 DEG C, do time as 15min in advance, then naturally cool, obtain premix;
2., by premix carry out extrusion molding in an extruder, obtain the wood plastics composite sheet material that thickness is 1.5mm;
Two, the wood plastic composite of non-woven fabrics clad can is prepared: when the non-woven fabrics after wood plastics composite sheet material leaves extruder die orifice by thickness being 0.05mm overlays in the wood plastics composite sheet surface that thickness is 1.5mm, temperature be 140 DEG C with pressure be under the condition of 0.5MPa, non-woven fabrics is pressed to wood plastics composite sheet material together with, obtain the wood plastic composite that thickness is the non-woven fabrics clad can of 1.5mm after cooling;
The raw material of the non-woven fabrics described in step 2 is polypropylene;
Three, glued board pretreatment: use sander to carry out sanding process to the upper surface of wooden plywood and lower surface, obtain ganoid wooden plywood;
Wooden plywood described in step 3 is the ageing-resistant glued board of outdoor stages;
Four, gluing: by 200g/m
2glue-spread adhesive is coated on the non-woven fabrics that thickness is the wood plastic composite of the non-woven fabrics clad can of 1.5mm, place 20min at ambient temperature, obtain the wood plastic composite of non-woven fabrics clad can after gluing;
Adhesive described in step 4 is phenolic resin adhesive;
Five, precompressed: the wood plastic composite of non-woven fabrics clad can after two gluings is overlayed on the upper and lower surface of ganoid wooden plywood respectively, the non-woven fabrics of gluing is contacted with glued board, precompressed 15min under room temperature and pressure are the condition of 2MPa, obtains the wood plastic composite veneered plywood of precompressed;
Six, hot pressing: be 130 DEG C and pressure by the wood plastic composite veneered plywood of precompressed in temperature be hot pressing 10min in the hot press of 2.5MPa, obtains wood plastic composite veneered plywood.
This test procedure one 1. described in thermoplastic be polypropylene;
This test procedure one 1. described in string powder be Poplar Powder, particle diameter is 180 μm ~ 2000 μm;
This test procedure one 1. described in inorganic filler be calcium carbonate, particle diameter is 38 μm ~ 40 μm;
This test procedure one 1. described in coupling agent be maleic anhydride stem grafting polyolefin, percent grafting is 1wt%;
This test procedure one 1. described in lubricant be paraffin;
This test procedure one 1. described in other fillers be the mixture of antioxidant, light stabilizer, anti-ultraviolet aging agent and fire retardant;
This test procedure one 2. described in the method for extrusion molding be: premix is respectively 155 DEG C, a district at each barrel zone temperature, two 165 DEG C, districts, three 170 DEG C, districts, four 175 DEG C, districts, five 175 DEG C, districts, six 150 DEG C, DEG CHe seven district of districts 165 and rotating speed are melting mixing granulation in the double screw extruder of 50r/min, obtain wood plastic composite pellet, again wood plastic composite pellet is joined each barrel zone temperature and be respectively 165 DEG C, a district, two 165 DEG C, districts, three 170 DEG C, DEG CHe tetra-district of districts 170 and rotating speed are extrude in the single screw extrusion machine of 20r/min, control mold temperature 165 DEG C and die orifice roll-in gap, obtain the wood plastics composite sheet material that thickness is 1.5mm.
According to GB/T 17657-1999 test methods of evaluating the properties of wood-based panels and surface decorated wood-based panels, boiling test is carried out to the wood and plastic composite veneered plywood that test two obtains, respectively the wood and plastic composite veneered plywood that common building template impregnated paper veneer glued board and test two obtain is placed on poach 4h in boiling water, dry 20h in the drying box that taking-up is placed on (63 ± 3) DEG C, and then common building template impregnated paper veneer glued board and the wood and plastic composite veneered plywoods that obtain of test two are placed in boiling water boil 4h respectively, the dry 3h of (63 ± 3) DEG C drying box is placed in again after taking-up.Result shows, the surface impregnation paper that after poach, common veneered plywood glue-line ftractures and substrate plywood are thrown off; The non-woven fabrics of the wood and plastic composite veneered plywood that test two obtains and glued board glue-line bond firmly, illustrate that in this test, wood plastic composite dash board and glued board have stronger bonding strength.
The Deflection Modulus of Elasticity of the wood and plastic composite veneered plywood that test two obtains improves 25% compared with the custom plywood template of impregnated paper veneer; The wood plastic composite veneered plywood surface of test two preparation does not need cleaning, and it is convenient to reclaim; The wood plastic composite veneered plywood of conventional impregnated paper veneer glued board and test two preparation uses as building template, after same use 10 times, there is a large amount of cut in conventional impregnated paper veneer plywood form plate face, all there are wearing and tearing in edge, but the wood and plastic composite veneered plywood that test two obtains still remains intact state.
Claims (8)
1. a wood plastic composite veneered plywood, is characterized in that a kind of wood plastic composite veneered plywood is prepared from by wood plastics composite sheet material, non-woven fabrics, wooden plywood and adhesive;
Described wood plastics composite sheet material is prepared according to the following steps:
Step one, take 30 parts ~ 100 parts thermoplastics, 20 parts ~ 200 parts string powders, 20 parts ~ 100 parts inorganic fillers, 3 parts ~ 10 parts coupling agents, 1 part ~ 4 parts lubricants, 1 part ~ 4 parts Masterbatch and 3 parts ~ 10 parts other fillers by mass fraction, then the thermoplastic taken, string powder, inorganic filler, coupling agent, lubricant, color masterbatch and other fillers are put into high-speed mixer and carry out premix, control temperature is 25 DEG C ~ 150 DEG C, do time as 5min ~ 20min in advance, then naturally cool, obtain premix;
Step 2, premix is carried out extrusion molding in an extruder, obtain the wood plastics composite sheet material that thickness is 0.5mm ~ 5mm;
Extrusion molding described in step 2 comprises following two kinds of methods, method one: be 140 DEG C ~ 210 DEG C and rotating speed by premix at each barrel zone temperature be melting mixing granulation in the double screw extruder of 30r/min ~ 100r/min, obtain wood plastic composite pellet, wood plastic composite pellet to be joined each barrel zone temperature be 140 DEG C ~ 200 DEG C and rotating speed is again extrude in the single screw extrusion machine of 10r/min ~ 100r/min, control mold temperature 140 DEG C ~ 200 DEG C and die orifice roll-in gap, obtain the wood plastics composite sheet material that thickness is 0.5mm ~ 5mm; Method two: the double screw extruder that to use each barrel zone temperature to be 140 DEG C ~ 210 DEG C and rotating speed be 10r/min ~ 100r/min is by premix direct extrusion molding, control mold temperature 140 DEG C ~ 210 DEG C and die orifice roll-in gap, obtain the wood plastics composite sheet material that thickness is 0.5mm ~ 5mm;
Thermoplastic described in step one is the one or more combination thing in polyethylene, polypropylene, polyvinyl chloride, polystyrene and polyamide;
String powder described in step one is the mixture of one or more in wood powder, bamboo powder, agricultural residues powder, shell powder, bagasse and powdered rice hulls; Described agricultural residues powder is corn stalk powder, wheat stalk powder, rice straw powder, soybean stalk powder or broomcorn straw powder;
The particle diameter of the string powder described in step one is 80 μm ~ 2000 μm;
Inorganic filler described in step one is the mixture of one or more in calcium carbonate, talcum powder, kaolin, mica, wollastonite and barium sulfate;
Coupling agent described in step one is the mixture of one or more in maleic anhydride stem grafting polyolefin, titanate esters, isocyanates, HMDS, HMDO, aminopropyl triethoxysilane and methacryloxypropyl trimethoxy silane;
Lubricant described in step one is the mixture of one or more in stearic acid, Metallic stearates, paraffin, Tissuemat E and polypropylene wax;
Other fillers described in step one are one or more mixtures in inorganic mineral filler, antioxidant, light stabilizer, anti-ultraviolet aging agent and fire retardant.
2. a kind of wood plastic composite veneered plywood according to claim 1, it is characterized in that the raw material of described non-woven fabrics is the composition of one or more in polypropylene, polyethylene, PETG, polyurethane and polyvinyl chloride, the thickness of non-woven fabrics is 0.01mm ~ 0.5mm; Described wooden plywood is the ageing-resistant glued board of outdoor stages.
3. a kind of wood plastic composite veneered plywood according to claim 1, is characterized in that described adhesive is the mixture of one or more in phenolic resin adhesive, cyanurotriamide modified urea resin adhesive, adhesive for polyurethane and epoxy resin adhesive.
4. a preparation method for wood plastic composite veneered plywood, is characterized in that a kind of preparation method of wood plastic composite veneered plywood completes according to the following steps:
One, wood plastics composite sheet material is prepared:
1., 30 parts ~ 100 parts thermoplastics, 20 parts ~ 200 parts string powders, 20 parts ~ 100 parts inorganic fillers, 3 parts ~ 10 parts coupling agents, 1 part ~ 4 parts lubricants, 1 part ~ 4 parts Masterbatch and 3 parts ~ 10 parts other fillers are taken by mass fraction, then the thermoplastic taken, string powder, inorganic filler, coupling agent, lubricant, color masterbatch and other fillers are put into high-speed mixer and carry out premix, control temperature is 25 DEG C ~ 150 DEG C, do time as 5min ~ 20min in advance, then naturally cool, obtain premix;
2., by premix carry out extrusion molding in an extruder, obtain the wood plastics composite sheet material that thickness is 0.5mm ~ 5mm;
Step one 1. described in the particle diameter of string powder be 80 μm ~ 2000 μm;
Step one 1. described in inorganic filler be the mixture of one or more in calcium carbonate, talcum powder, kaolin, mica, wollastonite and barium sulfate;
Step one 1. described in lubricant be the mixture of one or more in stearic acid, Metallic stearates, paraffin, Tissuemat E and polypropylene wax;
Step one 1. described in other fillers be one or more mixtures in inorganic mineral filler, antioxidant, light stabilizer, anti-ultraviolet aging agent and fire retardant;
Two, the wood plastic composite of non-woven fabrics clad can is prepared: when the non-woven fabrics after wood plastics composite sheet material leaves extruder die orifice by thickness being 0.01mm ~ 0.5mm overlays in the wood plastics composite sheet surface that thickness is 0.5mm ~ 5mm, temperature be 100 DEG C ~ 160 DEG C with pressure be under the condition of 0.1MPa ~ 1MPa, non-woven fabrics is pressed to wood plastics composite sheet material together with, obtain the wood plastic composite that thickness is the non-woven fabrics clad can of 0.5mm ~ 5.5mm after cooling;
The raw material of the non-woven fabrics described in step 2 is the composition of one or more in polypropylene, polyethylene, PETG, polyurethane and polyvinyl chloride;
Three, glued board pretreatment: use sander to carry out sanding process to the upper surface of wooden plywood and lower surface, obtain ganoid wooden plywood;
Wooden plywood described in step 3 is the ageing-resistant glued board of outdoor stages;
Four, gluing: by 100g/m
2~ 300g/m
2glue-spread adhesive is coated on the non-woven fabrics that thickness is the wood plastic composite of the non-woven fabrics clad can of 0.5mm ~ 5.5mm, place 15min ~ 30min at ambient temperature, obtain the wood plastic composite of non-woven fabrics clad can after gluing;
Adhesive described in step 4 is the mixture of one or more in phenolic resin adhesive, cyanurotriamide modified urea resin adhesive, adhesive for polyurethane and epoxy resin adhesive;
Five, precompressed: the wood plastic composite of non-woven fabrics clad can after two gluings is overlayed on the upper and lower surface of ganoid wooden plywood respectively, the non-woven fabrics of gluing is contacted with glued board, at condition precompressed 10min ~ 15min that room temperature and pressure are 1MPa ~ 3MPa, obtain the wood plastic composite veneered plywood of precompressed;
Six, hot pressing: be 90 DEG C ~ 150 DEG C and pressure by the wood plastic composite veneered plywood of precompressed in temperature be hot pressing 5min ~ 25min in the hot press of 1MPa ~ 6MPa, obtains wood plastic composite veneered plywood.
5. the preparation method of a kind of wood plastic composite veneered plywood according to claim 4, it is characterized in that the extrusion molding described in step one 2. comprises following two kinds of methods, method one: be 140 DEG C ~ 210 DEG C and rotating speed by premix at each barrel zone temperature be melting mixing granulation in the double screw extruder of 30r/min ~ 100r/min, obtain wood plastic composite pellet, wood plastic composite pellet to be joined each barrel zone temperature be 140 DEG C ~ 200 DEG C and rotating speed is again extrude in the single screw extrusion machine of 10r/min ~ 100r/min, control mold temperature 140 DEG C ~ 200 DEG C and die orifice roll-in gap, obtain the wood plastics composite sheet material that thickness is 0.5mm ~ 5mm,
Method two: the double screw extruder that to use each barrel zone temperature to be 140 DEG C ~ 210 DEG C and rotating speed be 10r/min ~ 100r/min is by premix direct extrusion molding, control mold temperature 140 DEG C ~ 210 DEG C and die orifice roll-in gap, obtain the wood plastics composite sheet material that thickness is 0.5mm ~ 5mm.
6. the preparation method of a kind of wood plastic composite veneered plywood according to claim 4, is characterized in that the thermoplastic described in step one is 1. the one or more combination thing in polyethylene, polypropylene, polyvinyl chloride, polystyrene and polyamide.
7. the preparation method of a kind of wood plastic composite veneered plywood according to claim 4, is characterized in that the string powder described in step one is 1. the mixture of one or more in wood powder, bamboo powder, agricultural residues powder, shell powder, bagasse and powdered rice hulls; Described agricultural residues powder is corn stalk powder, wheat stalk powder, rice straw powder, soybean stalk powder or broomcorn straw powder.
8. the preparation method of a kind of wood plastic composite veneered plywood according to claim 4, is characterized in that the coupling agent described in step one is 1. the mixture of one or more in maleic anhydride stem grafting polyolefin, titanate esters, isocyanates, HMDS, HMDO, aminopropyl triethoxysilane and methacryloxypropyl trimethoxy silane.
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