CN104149427A - Flame-retardant polyolefin wood plastic co-extrusion sectional material and preparation method thereof - Google Patents
Flame-retardant polyolefin wood plastic co-extrusion sectional material and preparation method thereof Download PDFInfo
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Abstract
The invention relates to the technical field of a composite material, and discloses a flame-retardant polyolefin wood plastic co-extrusion sectional material and a preparation method thereof. The flame-retardant polyolefin wood plastic co-extrusion sectional material comprises a flame-retardant layer (1) and a core body (3), and the flame retardant layer is prepared from the following raw materials in percentage by weight: 30%-80% of plastic, 0-30% of wood flour, 10%-30% of a flame retardant, 1%-3% of a coupling agent, 1%-5% of a lubricating agent, 0.1%-0.4% of an antioxidant, 0.2%-0.6% of an ultraviolet ray resistant agent and 1%-5% of toner, wherein the flame retardant is an environment-friendly polyolefin flame retardant. The surface of the polyolefin wood plastic composite material is subjected to flame retardant treatment to prepare the flame-retardant wood plastic coextrusion sectional material, so that the flame-retardant safety performance of the wood plastic composite material is improved, the application range of the wood plastic composite material is widened greatly, and the flame-retardant polyolefin wood plastic co-extrusion sectional material develops to a new level in the aspect of actual application of outdoor building materials.
Description
Technical field
The present invention relates to technical field of composite materials, related in particular to a kind of fire retardant polyolefin co-extrusion section bar and preparation method thereof.
Background technology
Wood plastic composite be wood-fibred or string using various form as reinforcing material or filler, a kind of novel environment friendly compound material being composited with thermoplastic resin (PE, PP, PVC) or other materials.Along with the raising of people's quality of life, safety collar is possessed to higher level understanding and consciousness of self-protection.Along with the development of wood plastic composite and in the progressively application of every field, to its fire protecting performance and applicability, have higher requirement, wherein just relate to the fire resistance aspect of wood plastic composite.Wood plastic composite has had both the advantage of biological material and plastics, but because biological material and plastics belong to combustible material, therefore, the fire-retardant rank of wood plastic composite cannot reach fire protection requirement protection, and this is also that the application of wood plastic composite has been caused to restriction.
The technology comparative maturity that at present carries out fire-retardant independent processing mainly for plastics and timber, but to the overall flame of polyolefin wood-plastic composite with and section bar Study on Preparation less, improving constantly of wood plastic composite overall flame technology become to one of developing direction.Particularly wood plastic composite, now to the development of coextrusion process direction, is a new developing direction to the research of its fire resistance.
In sum, in order to expand the application of wood-plastic co-extrusion material, improve the fire safety performance of wood-plastic co-extrusion material, need a kind of flame-retarded technology, wood-plastic co-extrusion material is carried out to flame treatment, prepare flame-retardant wood-plastic co-extrusion section bar.
Summary of the invention
The present invention is directed to existing biological material and plastics and belong to combustible material, the defect that fire-retardant rank is low and deficiency, provide one to possess good flame resistance, polyolefin wood plastic co-extrusion section bar that fire-protection rating is high and preparation method thereof.
In order to solve the problems of the technologies described above, the present invention is solved by following technical proposals:
A kind of fire retardant polyolefin wood-plastic co-extrusion section bar and preparation method thereof, comprise core body and be coated on the outside flame-retardant layer of core body (3), flame-retardant layer following raw materials according is by weight percentage made: plastics 30-80, wood powder 0-30, polyolefine fire retardant 10-30, coupling agent 1-3, lubricant 1-5, antioxidant 0.1-0.4, UV resistant agent 0.2-0.6, toner 1-5; Core body (3) following raw materials according is by weight percentage made: wood powder 50-70, high density polyethylene (HDPE) particle 20-37, lubricant 1-5, coupling agent 1-3, toner 1-5.
As preferably, the coupling agent that the raw material of flame-retardant layer (1) and core body (3) adopts is polyethylene coupling agent, lubricant is stearic acid and compounded lubricant, antioxidant is composite phosphite ester kind antioxidant, UV resistant agent is hindered amine as light stabilizer and ultra-violet absorber, and toner is inorganic pigment.
Core body and flame-retardant layer adopt coextrusion process one-shot forming, and step is as follows: A, raw material are prepared; B, charging batch mixing; C, granulation; D, extrusion molding; E, cooling and shaping; F, cutting.
A, raw material are prepared: flame-retardant layer following raw materials according is by weight percentage prepared: plastics 30-80, wood powder 0-30, polyolefine fire retardant 10-30, coupling agent 1-3, lubricant 1-5, antioxidant 0.1-0.4, UV resistant agent 0.2-0.6, toner 1-5 weigh respectively; Core body following raw materials according is by weight percentage prepared: wood powder 50-70, high density polyethylene (HDPE) particle 20-37, lubricant 1-5, coupling agent 1-3, toner 1-5;
B, charging batch mixing: together with raw material good with flame-retardant layer proportioning core body, pour storage bin into, through negative-pressure air fan, be drawn into high-speed mixer and start spice, stir by high-speed mixer, core body raw material incorporation time is 10～20 minutes, and flame-retardant layer raw material incorporation time is 5～10 minutes;
C, granulation: the raw material that core body and flame-retardant layer are mixed starts granulation by double screw extruder, core body raw material prilling temperature is 180～190 DEG C, make after material melting through shearing, pelletizing again, after cooling, make and mould wooden particle, chilling temperature is 10～30 DEG C, and flame-retardant layer raw material prilling temperature is 170～190 DEG C to be made after material melting, after tie rod, water cooling, pass through air-cooled shearing again, pelletizing becomes the flame-retardant layer particle of 2～3mm again;
D, extrusion molding: the quantifying feed hopper that the particle of core body raw material is sucked to conical double screw extruder by negative-pressure air fan, after extruder melting, enter the core body cavity of co-extruding mould, 180～190 DEG C of temperature, the particle of flame-retardant layer raw material is sucked to the quantifying feed hopper of single screw rod co-extrusion machine by negative-pressure air fan, after extruder melting, enter the flame-retardant layer cavity of co-extruding mould, 170～190 DEG C of temperature, according to profile size requirement, at 140～160 DEG C, extrude core body simultaneously and be coated on the clad outside core body through wood-plastic co-extrusion mould, again through shaper sizing,
E, cooling and shaping: the semi-finished product in shaper are undertaken cooling by cooling water, chilling temperature is 30～50 DEG C;
F, cutting: cooled semi-finished product enter cutting machine, cut into the finished product of all size size on request.
As preferably, the section bar upper surface after moulding is offered non-slip groove again.Use floor by a kind of fire retardant polyolefin wood-plastic co-extrusion section bar that the present invention is made for decorating, the design of surface anti-skidding groove can increase frictional force.
As preferably, in the middle part of the section bar after moulding, offer again through hole.Via design in section bar, in machine-shaping cooling procedure, can increase the passage of flowing through of cooling water, improves cooling effectiveness, also can in application scenarios, play the effect of draining.
The present invention is owing to having adopted above technical scheme, there is significant technique effect: the present invention has made up the defect and the deficiency that in prior art, exist, flame treatment is carried out in polyolefin wood-plastic composite surface, prepare flame-retardant wood-plastic co-extrusion section bar, thereby improve the flame-retarding performance of wood plastic composite.Its production technology has promoted the development of technical field, has improved the fire safety performance of wood plastic composite, has greatly expanded the range of application of wood plastic composite, is allowed to condition at outdoor building material practical application aspect and upgrades to a new height.
Brief description of the drawings
Fig. 1 is the embodiment of the present invention 1 structural representation.
The toponym that in above accompanying drawing, each number designation refers to is as follows: wherein, and 1-flame-retardant layer, 2-through hole, 3-core body, 4-non-slip groove.
Detailed description of the invention
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
Embodiment 1
A kind of fire retardant polyolefin wood-plastic co-extrusion section bar and preparation method thereof, as shown in Figure 1, comprise flame-retardant layer 1 and core body 3, flame-retardant layer 1 following raw materials according is by weight percentage made: plastics 57, wood powder 15, polyolefine fire retardant 20, polyethylene coupling agent 2, stearic acid and compounded lubricant 2.4, composite phosphite ester kind antioxidant 0.2, hindered amine as light stabilizer and ultra-violet absorber 0.4, inorganic pigment 3.
Core body 3 following raw materials according is by weight percentage made: wood powder 62, high density polyethylene (HDPE) particle 30, stearic acid and compounded lubricant 3, polyethylene coupling agent 2, inorganic pigment 3.
Core body 3 adopts coextrusion process one-shot forming with flame-retardant layer 1, and step is as follows: A, raw material are prepared; B, charging batch mixing; C, granulation; D, extrusion molding; E, cooling and shaping; F, cutting.
A, raw material are prepared: flame-retardant layer following raw materials according is by weight percentage prepared: plastics 57, wood powder 15, environment-friendly polyolefin fire retardant 20, polyethylene coupling agent 2, stearic acid and compounded lubricant 2.4, composite phosphite ester kind antioxidant 0.2, hindered amine as light stabilizer and ultra-violet absorber 0.4, inorganic pigment 3 weigh respectively; Core body following raw materials according is by weight percentage prepared: wood powder 62, high density polyethylene (HDPE) particle 30, stearic acid and compounded lubricant 3, polyethylene coupling agent 2, inorganic pigment 3;
B, charging batch mixing: together with raw material good with flame-retardant layer 1 proportioning core body 3, pour storage bin into, through negative-pressure air fan, be drawn into high-speed mixer and start spice, stir by high-speed mixer, core body 3 raw material incorporation times are 15 minutes, and flame-retardant layer 1 raw material incorporation time is 7 minutes;
C, granulation: the raw material that core body 3 and flame-retardant layer 1 are mixed starts granulation by double screw extruder, core body 3 raw material prilling temperatures are set to 185 DEG C, make after material melting through shearing, pelletizing again, after cooling, make and mould wooden particle, chilling temperature is 20 DEG C, and flame-retardant layer 1 raw material prilling temperature is set to 180 DEG C to be made after material melting, after tie rod, water cooling, pass through air-cooled shearing again, pelletizing becomes the flame-retardant layer particle of 2.5mm again;
D, extrusion molding: the quantifying feed hopper that the particle of core body 3 raw materials is sucked to conical double screw extruder by negative-pressure air fan, after extruder melting, enter core body 3 cavitys of co-extruding mould, 185 DEG C of set temperatures, the particle of flame-retardant layer 1 raw material is sucked to the quantifying feed hopper of single screw rod co-extrusion machine by negative-pressure air fan, after extruder melting, enter the flame-retardant layer cavity of co-extruding mould, 180 DEG C of set temperatures, according to profile size requirement, at 150 DEG C, extrude core body 3 simultaneously and be coated on the clad outside core body 3 through wood-plastic co-extrusion mould, again through shaper sizing,
E, cooling and shaping: the semi-finished product in shaper are undertaken cooling by cooling water, chilling temperature is 40 DEG C;
F, cutting: cooled semi-finished product enter cutting machine, cut into the finished product of all size size on request.
Section bar upper surface after moulding is offered non-slip groove 4 again.Use floor by a kind of fire retardant polyolefin wood-plastic co-extrusion section bar that the present invention is made for decorating, the design of flame-retardant layer 1 non-slip groove 4 can increase frictional force.
Through hole 2 is offered at section bar middle part after moulding again.Through hole 2 in section bar designs in machine-shaping cooling procedure, can increase the passage of flowing through of cooling water, improves cooling effectiveness, also can in application scenarios, play the effect of draining.
Embodiment 2
A kind of fire retardant polyolefin wood-plastic co-extrusion section bar and preparation method thereof, core body 3 adopts coextrusion process one-shot forming with flame-retardant layer 1, and step is as follows: A, raw material are prepared; B, charging batch mixing; C, granulation; D, extrusion molding; E, cooling and shaping; F, cutting.
A, raw material prepare: core body 3 following raw materials according is by weight percentage prepared: wood powder 50, plastics be 37, stearic acid and compounded lubricant are 5, polyethylene coupling agent is 3, inorganic pigment is 5 to weigh respectively, plastics are high density polyethylene (HDPE) particle; Following raw materials according by weight percentage of flame-retardant layer is prepared: plastics be 30, wood powder 30, environment-friendly polyolefin fire retardant are 30, polyethylene coupling agent is 3, stearic acid and compounded lubricant are 5, antioxidant is 0.4, hindered amine as light stabilizer and ultra-violet absorber are 0.6, inorganic pigment is 1, weigh respectively;
B, charging batch mixing: together with raw material good with flame-retardant layer 1 proportioning core body 3, pour storage bin into, through negative-pressure air fan, be drawn into high-speed mixer and start spice, stir by high-speed mixer, core body 3 raw material incorporation times are 10 minutes, and flame-retardant layer 1 raw material incorporation time is 5 minutes;
C, granulation: the raw material that core body 3 and flame-retardant layer 1 are mixed starts granulation by double screw extruder, core body 3 raw material prilling temperatures are set to 180 DEG C, make after material melting through shearing, pelletizing again, after cooling, make and mould wooden particle, chilling temperature is 10 DEG C, and flame-retardant layer 1 raw material prilling temperature is set to 170 DEG C to be made after material melting, after tie rod, water cooling, pass through air-cooled shearing again, pelletizing becomes the flame-retardant layer particle of 2mm again;
D, extrusion molding: the quantifying feed hopper that the particle of core body 3 raw materials is sucked to conical double screw extruder by negative-pressure air fan, after extruder melting, enter core body 3 cavitys of co-extruding mould, 180 DEG C of set temperatures, the particle of flame-retardant layer 1 raw material is sucked to the quantifying feed hopper of single screw rod co-extrusion machine by negative-pressure air fan, after extruder melting, enter the flame-retardant layer cavity of co-extruding mould, 170 DEG C of set temperatures, according to profile size requirement, at 140 DEG C, extrude core body 3 simultaneously and be coated on the clad outside core body 3 through wood-plastic co-extrusion mould, again through shaper sizing,
E, cooling and shaping: the semi-finished product in shaper are undertaken cooling by cooling water, chilling temperature is 30 DEG C;
F, cutting: cooled semi-finished product enter cutting machine, cut into the finished product of all size size on request.
Section bar upper surface after moulding is offered non-slip groove 4 again.Use floor by a kind of fire retardant polyolefin wood-plastic co-extrusion section bar that the present invention is made for decorating, the design of flame-retardant layer 1 non-slip groove 4 can increase frictional force.
Through hole 2 is offered at section bar middle part after moulding again.Through hole 2 in section bar designs in machine-shaping cooling procedure, can increase the passage of flowing through of cooling water, improves cooling effectiveness, also can in application scenarios, play the effect of draining.
Embodiment 3
A kind of fire retardant polyolefin wood-plastic co-extrusion section bar and preparation method thereof, as shown in Figure 1, core body 3 adopts coextrusion process one-shot forming with flame-retardant layer 1, and step is as follows: A, raw material are prepared; B, charging batch mixing; C, granulation; D, extrusion molding; E, cooling and shaping; F, cutting.
A, raw material prepare: core body 3 following raw materials according is by weight percentage prepared: wood powder be 70, plastics are 27, stearic acid and compounded lubricant are 1, polyethylene coupling agent is 1, inorganic pigment is 1 to weigh respectively, plastics are high density polyethylene (HDPE) particle; Following raw materials according by weight percentage of flame-retardant layer is prepared: plastics be 80, environment-friendly polyolefin fire retardant is 12.7, polyethylene coupling agent is 1, stearic acid and compounded lubricant are 1, composite phosphite ester kind antioxidant is 0.1, hindered amine as light stabilizer and ultra-violet absorber are 0.2, inorganic pigment is 5;
B, charging batch mixing: together with raw material good with flame-retardant layer 1 proportioning core body 3, pour storage bin into, through negative-pressure air fan, be drawn into high-speed mixer and start spice, stir by high-speed mixer, core body 3 raw material incorporation times are 20 minutes, and flame-retardant layer 1 raw material incorporation time is 10 minutes;
C, granulation: the raw material that core body 3 and flame-retardant layer 1 are mixed starts granulation by double screw extruder, core body 3 raw material prilling temperatures are set to 190 DEG C, make after material melting through shearing, pelletizing again, after cooling, make and mould wooden particle, chilling temperature is 30 DEG C, and flame-retardant layer 1 raw material prilling temperature is set to 190 DEG C to be made after material melting, after tie rod, water cooling, pass through air-cooled shearing again, pelletizing becomes flame-retardant layer 1 particle of 3mm again;
D, extrusion molding: the quantifying feed hopper that the particle of core body 3 raw materials is sucked to conical double screw extruder by negative-pressure air fan, after extruder melting, enter core body 3 cavitys of co-extruding mould, 190 DEG C of set temperatures, the particle of flame-retardant layer 1 raw material is sucked to the quantifying feed hopper of single screw rod co-extrusion machine by negative-pressure air fan, after extruder melting, enter the flame-retardant layer cavity of co-extruding mould, 190 DEG C of set temperatures, according to profile size requirement, at 160 DEG C, extrude core body 3 simultaneously and be coated on the clad outside core body 3 through wood-plastic co-extrusion mould, again through shaper sizing,
E, cooling and shaping: the semi-finished product in shaper are undertaken cooling by cooling water, chilling temperature is 50 DEG C;
F, cutting: cooled semi-finished product enter cutting machine, cut into the finished product of all size size on request.
Section bar flame-retardant layer 1 after moulding is offered non-slip groove 4 again.Use floor by a kind of fire retardant polyolefin wood-plastic co-extrusion section bar that the present invention is made for decorating, the design of flame-retardant layer 1 non-slip groove 4 can increase frictional force.
Through hole 2 is offered at section bar middle part after moulding again.Through hole 2 in section bar core body 3 designs in machine-shaping cooling procedure, can increase the passage of flowing through of cooling water, improves cooling effectiveness, also can in application scenarios, play the effect of draining.
A kind of fire retardant polyolefin wood-plastic co-extrusion section bar and preparation method thereof, quotes GB8624-2006 test method and tests, and high flame retardant grade meets the requirement of B level, and concrete quoting method is as follows:
GB/T5464 construction material non-combustibility test method;
GB/T8626 Test method of flammability for building materials;
GB/T11785 pavement combustibility is measured radiant heat source method;
GB/T14402 construction material combustion heat value test method;
Claims (5)
1. a fire retardant polyolefin wood-plastic co-extrusion section bar, it is characterized in that: comprise core body (3) and be coated on the outside flame-retardant layer (1) of core body (3), flame-retardant layer (1) following raw materials according is by weight percentage made: plastics 30-80, wood powder 0-30, polyolefine fire retardant 10-30, coupling agent 1-3, lubricant 1-5, antioxidant 0.1-0.4, UV resistant agent 0.2-0.6, toner 1-5; Core body (3) forms by following raw materials by weight: wood powder 50-70, high density polyethylene (HDPE) particle 20-37, lubricant 1-5, coupling agent 1-3, toner 1-5.
2. a kind of fire retardant polyolefin wood-plastic co-extrusion section bar according to claim 1, it is characterized in that: the coupling agent that the raw material of flame-retardant layer (1) and core body (3) adopts is polyethylene coupling agent, lubricant is stearic acid and compounded lubricant, antioxidant is composite phosphite ester kind antioxidant, UV resistant agent is hindered amine as light stabilizer and ultra-violet absorber, and toner is inorganic pigment.
3. a preparation method for fire retardant polyolefin wood-plastic co-extrusion section bar, is characterized in that: core body (3) adopts coextrusion process one-shot forming with flame-retardant layer (1), and step is as follows:
A, raw material are prepared, and flame-retardant layer (1) following raw materials according is by weight percentage prepared: plastics 30-80, wood powder 0-30, polyolefine fire retardant 10-30, coupling agent 1-3, lubricant 1-5, antioxidant 0.1-0.4, UV resistant agent 0.2-0.6, toner 1-5; Core body (3) following raw materials according is by weight percentage prepared: wood powder 50-70, high density polyethylene (HDPE) particle 20-37, lubricant 1-5, coupling agent 1-3, toner 1-5;
B, charging batch mixing, pour together core body (3) and the good raw material of flame-retardant layer (1) proportioning into storage bin, through negative-pressure air fan, be drawn into high-speed mixer and start spice, stir by high-speed mixer, core body (3) raw material incorporation time is 10～20 minutes, and flame-retardant layer (1) raw material incorporation time is 5～10 minutes;
C, granulation, the raw material that core body (3) and flame-retardant layer (1) are mixed starts granulation by double screw extruder, core body (3) raw material prilling temperature is 180～190 DEG C, after material melting through shearing, then pelletizing, after cooling, make and mould wooden particle, chilling temperature is 10～30 DEG C, and flame-retardant layer (1) raw material prilling temperature is 170～190 DEG C, after material melting, after tie rod, water cooling, pass through air-cooled shearing again, pelletizing becomes the flame-retardant layer particle of 2～3mm again;
D, extrusion molding, the particle of core body (3) raw material is sucked to the quantifying feed hopper of conical double screw extruder by negative-pressure air fan, after extruder melting, enter core body (3) cavity of co-extruding mould, temperature is 180～190 DEG C, the particle of flame-retardant layer raw material is sucked to the quantifying feed hopper of single screw rod co-extrusion machine by negative-pressure air fan, after extruder melting, enter the flame-retardant layer cavity of co-extruding mould, temperature is 170～190 DEG C, according to profile size requirement, at 140～160 DEG C, extrude core body (3) simultaneously and be coated on the flame-retardant layer (1) outside core body through wood-plastic co-extrusion mould, again through shaper sizing,
E, cooling and shaping, the semi-finished product in shaper are undertaken cooling by cooling water, and chilling temperature is 30～50 DEG C;
F, cutting, cooled semi-finished product enter cutting machine, cut on request the finished product of all size size.
4. the preparation method of a kind of fire retardant polyolefin wood-plastic co-extrusion section bar according to claim 3, is characterized in that: the section bar upper surface after moulding is offered non-slip groove (4) again.
5. the preparation method of a kind of fire retardant polyolefin wood-plastic co-extrusion section bar according to claim 3, is characterized in that: through hole (2) is offered at the section bar middle part after moulding again.
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