CN101168262A - Double-layer plastic-wood composite material and preparation method thereof - Google Patents
Double-layer plastic-wood composite material and preparation method thereof Download PDFInfo
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- CN101168262A CN101168262A CNA2007100190970A CN200710019097A CN101168262A CN 101168262 A CN101168262 A CN 101168262A CN A2007100190970 A CNA2007100190970 A CN A2007100190970A CN 200710019097 A CN200710019097 A CN 200710019097A CN 101168262 A CN101168262 A CN 101168262A
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Abstract
The invention discloses a two-level wood-plastic composite material and process for preparation. An inner core body of the composite material is compounded by coarse wood flour or agricultural straw powder and waste plastics. According to the percentage by weight, the coarse wood flour or the agricultural straw powder is 60-75%, and the waste plastic is 25-40%. When being combined, added coupling agent is additionally weighed and is 1-5% of the gross weight of main body materials, and lubricating agent is 0.5-5%. An outer layer is compounded by pure wood floor and novel plastic. According to the percentage by weight, the pure wood floor is 30-50%, and the novel plastic is 50-70%. When being combined, the added coupling agent is additionally weighed and is 1-5% of the gross weight of the main body materials, functional auxiliary agent is 1-5%, lubricating agent is 0.5-5%, and the thickness of the outer layer is equal or more than 3 millimeters. The process for preparing the composite material has the steps of raw material preparation, mixing granulation, extrusion molding, shaping, cooling, pulling, cutting and the like. The two-level wood-plastic composite material of the invention has the advantages of wood property and plastics property.
Description
Technical field
The invention belongs to technical field of composite materials, relate to a kind of double-layer plastic-wood composite material, also relate to the manufacture method of this kind double-layer plastic-wood composite material.
Background technology
Along with the sustainable development of China's modernization construction and improving constantly of living standards of the people, the timber demand amount grows with each passing day, and the over-exploitation that brings thus makes and caused serious environmental problem by the vegetation resources growing tension.On the other hand, the plastic products extensive use, but its waste recovery utilizes the system imperfection again, and many people lack " white pollution " that environmental consciousness causes, and have become urgent problem in the environmental protection cause.
Under this background, Wood plastic composite arises at the historic moment.Wood plastic composite is to use wood powder, agricultural stalk powder filled thermoplastic (reclaimed materials or virgin material), adds coupling agent and various relevant processing aid again, through extrusion molding, can make the section bar at sheet material, stupefied material, tubing and various special-shaped interfaces.This series products not only can be saved a large amount of forest reserves, can also effectively handle the dead meal that produces in a large amount of waste or used plastics and the timber process, agricultural crop straw etc., meets the purpose that protection is improved the ecological environment.
Summary of the invention
The purpose of this invention is to provide a kind of double-layer plastic-wood composite material, solve the existing timber resources problem under-utilized more in short supply day by day with waste wood, agricultural crop straw, waste or used plastics material recovery.
Another object of the present invention provides the manufacture method of this kind double-layer plastic-wood composite material, simplifies production routine, reduces production costs.
Technical scheme of the present invention is, a kind of double-layer plastic-wood composite material, comprise internal layer core body and skin, the internal layer core body is made up of coarse flour or agricultural stalk powder, waste or used plastics, coupling agent, lubricant, coarse flour or agricultural stalk powder are 60%～75% by weight percentage, waste or used plastics is 25%～40%, and the material of main part that coarse flour or agricultural stalk powder and waste or used plastics are formed adds up to 100%; Coupling agent is 1%～5% of a material of main part gross weight, and lubricant is 0.5%～5% of a material of main part gross weight.Skin is made up of pure wood powder, new product plastics, coupling agent, lubricant, function additive, and pure by weight percentage wood powder is 30%～50%, and the new product plastics are 50%～70%, and the material of main part that pure wood powder and new product plastics are formed adds up to 100%; Coupling agent is 1%～5% of a material of main part gross weight, function additive is 1%～5% of a material of main part gross weight, lubricant is 0.5%～5% of a material of main part gross weight, described function additive is made up of fire retardant and ultra-violet absorber, fire retardant and ultra-violet absorber are according to percentage by weight preparation in 1: 1, and outer layer thickness is more than or equal to 3mm.
Coarse flour is selected wood shavings for use.
The agricultural stalk powder is selected cotton stalk powder or wheat powder of straw for use.
Plastics are selected one or both the mixing in polyethylene, polypropylene, the polyvinyl chloride for use.
Coupling agent is selected maleic anhydride MA or polyethylene MAPE for use.
Fire retardant is selected Al (OH) for use
3Ultra-violet absorber is selected UV-234 or UV-T for use.
Lubricant is selected zinc stearate for use.
Another technical scheme of the present invention is, the manufacture method of this kind double-layer plastic-wood composite material adopts following processing step to implement,
Step 1, raw material are prepared:
Earlier will raw materials usedly dry processing, for wood powder or agricultural stalk powder require oven dry afterwards moisture content be not more than 3%;
A, internal layer core body: weighing by weight percentage: coarse flour or agricultural stalk powder are 60%～75%, and waste or used plastics is 25%～40%, and the material of main part that coarse flour or agricultural stalk powder and waste or used plastics are formed adds up to 100%; The weighing coupling agent is 1%～5% of a material of main part gross weight, and the weighing lubricant is 0.5%～5% of a material of main part gross weight; Earlier 1%～5% coupling agent is added in 60%～75% the coarse flour or agricultural stalk powder, carry out surface treatment, be reprocessed into 10～30 purposes and mix meal; Simultaneously 25%～40% waste or used plastics sorted, clean, fragmentation;
B, skin: weighing by weight percentage: pure wood powder is 30%～50%, and the new product plastics are 50%～70%, and the material of main part that pure wood powder and new product plastics are formed adds up to 100%; The weighing coupling agent is 1%～5% of a material of main part gross weight, the weighing function additive is 1%～5% of a material of main part gross weight, the weighing lubricant is 0.5%～5% of a material of main part gross weight, described function additive is made up of fire retardant and ultra-violet absorber, and fire retardant and ultra-violet absorber are according to percentage by weight preparation in 1: 1; Earlier 1%～5% coupling agent is joined in 30%～50% the pure wood powder, carry out surface treatment, be reprocessed into the senior thin wooden mixed powder of 80～150 purposes; Simultaneously 50%～70% new product plastics are cleaned, fragmentation;
Step 2, mixing granulation:
Lubricant mixing stirring with the ready internal layer core body of step 1 material of main part adding 0.5%～3.5%; With the lubricant of the ready outer material of main part adding 0.5%～3.5% of step 1 and 1%～5% function additive mixing stirring; Keeping mixing whipping temp is 80 ℃～100 ℃, and the mixing mixing time is 30min, and internal layer core body that then this step is obtained and outer mixed material carry out granulation respectively, and prilling temperature is 120 ℃～200 ℃,
Step 3, extrusion molding, typing and cooling:
The pellet of step 2 preparation is required to extrude the internal layer core body according to profile size earlier, carry out outer extrusion molding again, extrusion temperature is 130 ℃～170 ℃, and carries out synchronous cooling processing,
Step 4, traction and cutting:
When carry out step 3, draw product continuously equably, according to actual needs length and specification cutting get final product.
The invention has the beneficial effects as follows that it has the advantage of timber and plastics performance concurrently, rationally utilized the plastics of natural resources and recovery, effectively alleviate " white pollution ", have the remarkable environmental benefit.The goods of sandwich of the present invention through long-term use become waste and old after, can pulverize once more, when the core body raw material reclaims, have the advantages that to recycle, can not produce new environomental pollution source.
The specific embodiment
The present invention is described in detail below in conjunction with the specific embodiment.
Composite of the present invention is a double-decker, the internal layer core body is made up of coarse flour or agricultural stalk powder, waste or used plastics, coupling agent, lubricant, skin is made up of pure wood powder, new product plastics, coupling agent, lubricant, function additive, and outer layer thickness is more than or equal to 3mm.And the portfolio ratio difference of inside and outside two layers of thermoplastic plastics has different characteristics and effect.
Double-layer plastic-wood composite material provided by the invention (WPC), skin is that virgin material is formed, and plastic components large percentage, adopt ultra-fine single pure wood powder, can select pine, poplar for use, add ultra-violet absorber and fire retardant in addition, make that this Wood plastic composite possesses that surperficial woodiness touch is strong, material surface is fine and smooth, variable color is slow, water-fast, acid and alkali-resistance, do not damaged by worms, can mouldyly do not rotted, characteristic such as pollution-free, be particularly suitable for outdoor engineering and replace solid wood to use, as the stupefied material of view wood, outdoor pedal, traffic isolation railing etc.Every performances such as the rigidity of this double-layer composite material, intensity are mainly provided by skin, thereby higher to its performance requirement.The main performance test value of cladding material is as follows: the modulus of elasticity in static bending 3.1～6.9GPa; Crooked breaking strength 48.8～79.2MPa; Fracture elongation 3.4%～7.2%; Bending strength 32.0～67.7MPa; Impact strength 42.8～53.0KJm
-2Screw withdrawal force 340～368kg; Ultraviolet degradation speed 0.03～0.05mm/.Core material employing waste or used plastics and sawdust, powder of straw, and amount of plastic is few, does not contain functional aid, when guaranteeing working strength and rigidity, makes this double-layer plastic-wood composite material have very cheap cost, and its performance requirement is lower.This layer main performance test value is as follows: tensile strength 14.0～25.0MPa; Bending strength 9.0～18.0MPa; Impact strength 3.0～5.5KJm
-2
Embodiment one:
Step 1, raw material are prepared:
Earlier will raw materials usedly dry processing, for sawdust and senior pine powder require oven dry afterwards moisture content be not more than 3%;
A, internal layer core body raw material: material of main part weighing sawdust by weight percentage is 60%, and the waste polyethylene plastics are 40%, adds up to 100%; The maleic anhydride MA of weighing is 1.0% of a material of main part gross weight in addition, and zinc stearate is 0.5% of a material of main part gross weight.First sawdust with 60% adds 1.0% maleic anhydride MA, handles 15 minutes in mixer, carries out surface treatment, is reprocessed into 10 purposes and mixes meal; With 40% waste polyethylene plastics sort, clean, fragmentation;
B, outer raw material: the senior pine powder of material of main part weighing by weight percentage 80 purposes is 30%, and the igelite of new product is 70%, adds up to 100%; The maleic anhydride MA of weighing is 1.0% of a material of main part pellet gross weight in addition, and zinc stearate is 0.5% of a material of main part gross weight, Al (OH)
3For the material of main part gross weight 0.5%, UV-234 is 0.5% of material of main part gross weight, earlier 30% senior pine powder added 1.0% maleic anhydride MA, carries out surface treatment, is reprocessed into the senior thin wooden mixed powder of 80～150 purposes; New igelite cleaning, fragmentation with 70%.
Step 2, mixing granulation: with the zinc stearate mixing stirring of the ready internal layer core body of step 1 material of main part adding 0.5%; The ready outer material of main part of step 1 is added 0.5% zinc stearate, 0.5% Al (OH)
3, mix stirring behind 0.5% the UV-234.Keeping mixing whipping temp is 80 ℃, and the mixing mixing time is 30min, and internal layer core body that then this step is obtained and outer mixed material carry out granulation respectively, and prilling temperature is 130 ℃～140 ℃.
Step 3, extrusion molding, typing and cooling: the pellet of step 2 preparation is extruded at twice.Require to extrude the internal layer core body through double screw extruder according to profile size earlier, adopt vertical head and T-shape mould to carry out outer extrusion molding again, extrusion temperature is 130 ℃～140 ℃, and extruded velocity is 1.5 meters/minute.And carrying out synchronous cooling processing, core body and skin all adopt water-cooled.
Step 4, traction and cutting: when carry out step 3, draw product continuously equably, according to actual needs length and specification cutting get final product.
Each main performance detected value of composite that present embodiment is made is as follows:
Outer---modulus of elasticity in static bending 3.7GPa; Crooked breaking strength 79.2MPa; Fracture elongation 6.5%; Bending strength 41.7MPa; Impact strength 50.2KJm
-2Screw withdrawal force 368kg; Ultraviolet degradation speed 0.035mm/.
Core body---tensile strength 14.5MPa; Bending strength 9.5MPa; Impact strength 7.5KJm
-2
Embodiment two:
Step 1, raw material are prepared:
Earlier will raw materials usedly dry processing, for wheat powder of straw or senior poplar powder require oven dry afterwards moisture content be not more than 3%;
A, internal layer core body raw material: material of main part weighing wheat powder of straw by weight percentage is 75%, and waste polypropylene plastic is 25%, adds up to 100%; The maleic anhydride MA of weighing is 1.5% of a material of main part gross weight in addition, and zinc stearate is 3.5% of a material of main part gross weight.First wheat powder of straw with 75% adds 1.5% maleic anhydride MA, carries out surface treatment, is reprocessed into 30 purposes and mixes meal; With 25% waste polypropylene plastic sort, clean, fragmentation;
B, outer raw material: the senior poplar powder of material of main part weighing by weight percentage 100 purposes is 50%, and the polypropylene plastics of new product is 50%, adds up to 100%; The maleic anhydride MA of weighing is 1.5% of a material of main part gross weight in addition, zinc stearate be the material of main part gross weight 3.5%, Al (OH)
3For the material of main part gross weight 1.5%, UV-234 is 1.5% of material of main part gross weight.First senior poplar powder with 50% adds 1.5% maleic anhydride, carries out surface treatment, is reprocessed into the senior thin wooden mixed powder of 100 purposes; New polypropylene plastics with 50% clean, fragmentation;
Step 2, mixing granulation: with the zinc stearate mixing stirring of the ready internal layer core body of step 1 material of main part adding 3.5%; The ready outer material of main part of step 1 is added 3.5% zinc stearate, 1.5% Al (OH)
3, 1.5% UV-234 mixes stirring together.Keeping temperature is 100 ℃, and the mixing mixing time is 30min, and internal layer core body that then this step is obtained and outer mixed material carry out granulation respectively, and prilling temperature is 190 ℃～200 ℃,
Step 3, extrusion molding, typing and cooling: the pellet of step 2 preparation is extruded at twice.Keeping extrusion temperature is 160 ℃～170 ℃, and extruded velocity is 1.5 meters/minute.And carrying out synchronous cooling processing, core body and skin all adopt water-cooled.
Step 4, traction and cutting: when carry out step 3, draw product continuously equably, according to actual needs length and specification cutting get final product.
Each main performance detected value of composite that present embodiment is made is as follows:
Outer---modulus of elasticity in static bending 5.6GPa; Crooked breaking strength 72.7MPa; Fracture elongation 3.45%; Bending strength 59.1MPa; Impact strength 44.8KJm
-2Screw withdrawal force 342kg; Ultraviolet degradation speed 0.04mm/.
Core body---tensile strength 19.6MPa; Bending strength 14.7MPa; Impact strength 5.7KJm
-2
Embodiment three:
Step 1, raw material are prepared:
Earlier will raw materials usedly dry processing, for cotton stalk powder or senior poplar powder require oven dry afterwards moisture content be not more than 3%;
A, internal layer core body raw material: the cotton stalk powder of material of main part weighing by weight percentage is 70%, and waste vinylene chloride plastic is 30%, adds up to 100%; The polyethylene MAPE of weighing is 5.0% of a material of main part gross weight in addition, and zinc stearate is 2.5% of a material of main part gross weight.First cotton stalk powder with 70% adds 5.0% polyethylene MAPE, carries out surface treatment, is reprocessed into 20 purposes and mixes meal; With 30% waste vinylene chloride plastic sort, clean, fragmentation;
B, outer raw material: the senior poplar powder of material of main part weighing by weight percentage 90 purposes is 40%, and the polypropylene plastics of new product is 60%, adds up to 100%; The polyethylene MAPE that adds of weighing is 5.0% of a material of main part gross weight in addition, zinc stearate be the material of main part gross weight 2.5%, Al (OH)
3For the material of main part gross weight 2.5%, UV-T is 2.5% of material of main part gross weight.First senior poplar powder with 40% adds 5.0% polyethylene MAPE, carries out surface treatment, is reprocessed into the senior thin wooden mixed powder of 90 purposes; New polypropylene plastics with 60% clean, fragmentation;
Step 2, mixing granulation: with the zinc stearate mixing stirring of the ready internal layer core body of step 1 material of main part adding 2.5%; The ready outer material of main part of step 1 is added 2.5% zinc stearate, 2.5% Al (OH)
3, 2.5% UV-T mixes stirring together.Keeping mixing whipping temp is 90 ℃, and the mixing mixing time is 30min, and internal layer core body that then this step is obtained and outer mixed material carry out granulation respectively, and prilling temperature is 160 ℃～170 ℃,
Step 3, extrusion molding, typing and cooling: the pellet of step 2 preparation is extruded at twice, and keeping extrusion temperature is 140 ℃～150 ℃, and extruded velocity is 1.5 meters/minute.And carrying out synchronous cooling processing, core body and skin all adopt water-cooled.
Step 4, traction and cutting: when carry out step 3, draw product continuously equably, according to actual needs length and specification cutting get final product.
Each main performance detected value of composite that present embodiment is made is as follows:
Outer---modulus of elasticity in static bending 3.3GPa; Crooked breaking strength 53.9MPa; Fracture elongation 7.2%; Bending strength 34.0MPa; Impact strength 53.0KJm
-2Screw withdrawal force 364kg; Ultraviolet degradation speed 0.04mm/.
Core body---tensile strength 21.9MPa; Bending strength 11.5MPa; Impact strength 3.2KJm
-2
Embodiment four:
Step 1, raw material are prepared:
Earlier will raw materials usedly dry processing, for cotton stalk powder or senior poplar powder require oven dry afterwards moisture content be not more than 3%;
A, internal layer core body raw material: the cotton stalk powder of material of main part weighing by weight percentage is 60%, and waste polyvinyl chloride and vinyon respectively are 20%, add up to 100%; The polyethylene MAPE of weighing is 4.0% of a material of main part gross weight in addition, and zinc stearate is 3.0% of a material of main part gross weight.First cotton stalk powder with 60% adds 4.0% polyethylene MAPE, carries out surface treatment, is reprocessed into 15 purposes and mixes meal; Waste polyvinyl chloride and vinyon with 40% sorts, cleans, fragmentation;
B, outer raw material: the senior poplar powder of material of main part weighing by weight percentage 100 purposes is 30%, and the polypropylene of new product and igelite respectively are 35%, adds up to 100%; The polyethylene MAPE that adds of weighing is 4.0% of a material of main part gross weight in addition, zinc stearate be the material of main part gross weight 3.0%, Al (OH)
3For the material of main part gross weight 2.0%, UV-T is 2.0% of material of main part gross weight.First senior poplar powder with 40% adds 4.0% polyethylene MAPE, carries out surface treatment, is reprocessed into the senior thin wooden mixed powder of 100 purposes; New polypropylene with 70% and igelite clean, fragmentation;
Step 2, mixing granulation: 3.0% the zinc stearate mixing stirring that the ready internal layer core body of step 1 material of main part is added; The ready outer material of main part of step 1 is added 3.0% zinc stearate, 2.0% Al (OH)
3, 2.0% UV-T mixes stirring together.Keeping mixing whipping temp is 85 ℃, and the mixing mixing time is 30min, and internal layer core body that then this step is obtained and outer mixed material carry out granulation respectively, and prilling temperature is 140 ℃～150 ℃,
Step 3, extrusion molding, typing and cooling: the pellet of step 2 preparation is extruded at twice.Keeping extrusion temperature is 150 ℃～160 ℃, and extruded velocity is 1.5 meters/minute.And carrying out synchronous cooling processing, core body and skin all adopt water-cooled.
Step 4, traction and cutting: when carry out step 3, draw product continuously equably, according to actual needs length and specification cutting get final product.
Each main performance detected value of composite that present embodiment is made is as follows:
Outer---modulus of elasticity in static bending 6.9GPa; Crooked breaking strength 77.3MPa; Fracture elongation 4.6%; Bending strength 67.5MPa; Impact strength 51.9KJm
-2Screw withdrawal force 352kg; Ultraviolet degradation speed 0.035mm/.
Core body---tensile strength 20.1MPa; Bending strength 13.9MPa; Impact strength 6.1KJm
-2
Embodiment five:
Step 1, raw material are prepared:
Earlier will raw materials usedly dry processing, for sawdust or senior pine powder require oven dry afterwards moisture content be not more than 3%;
A, internal layer core body raw material: material of main part weighing sawdust by weight percentage is 70%, and waste and old polypropylene and igelite respectively are 15%, adds up to 100%; The maleic anhydride MA of weighing interpolation is 2.5% of a material of main part gross weight in addition, and zinc stearate is 1.5% of a material of main part gross weight.First sawdust with 70% adds 2.5% maleic anhydride MA, carries out surface treatment, is reprocessed into 20 purposes and mixes meal; Waste and old polypropylene and igelite with 30% sorts, cleans, fragmentation;
B, outer raw material: the senior pine powder of material of main part weighing by weight percentage 80 purposes is 50%, and the polyethylene of new product and polypropylene plastics respectively are 25%, adds up to 100%; The maleic anhydride MA that adds of weighing is 2.5% of a material of main part gross weight in addition, zinc stearate be the material of main part gross weight 1.5%, Al (OH)
3For the material of main part gross weight 1.0%, UV-234 is 1.0% of material of main part gross weight.First senior pine powder with 50% adds 2.5% maleic anhydride, carries out surface treatment, is reprocessed into the senior thin wooden mixed powder of 80 purposes; New polyethylene with 50% and polypropylene plastics clean, fragmentation;
Step 2, mixing granulation: with the zinc stearate mixing stirring of the ready internal layer core body of step 1 material of main part adding 1.5%; The ready outer material of main part of step 1 is added 1.5% zinc stearate, 1.0% Al (OH)
3, 1.0% UV-234 mixes stirring together.Keeping mixing whipping temp is 95 ℃, and the mixing mixing time is 30min, and internal layer core body that then this step is obtained and outer mixed material carry out granulation respectively, and prilling temperature is 150 ℃～160 ℃,
Step 3, extrusion molding, typing and cooling: the pellet of step 2 preparation is extruded at twice.Keeping extrusion temperature is 140 ℃～150 ℃, and extruded velocity is 1.5 meters/minute.And carrying out synchronous cooling processing, core body and skin all adopt water-cooled.
Step 4, traction and cutting: when carry out step 3, draw product continuously equably, according to actual needs length and specification cutting get final product.
Each main performance detected value of composite that present embodiment is made is as follows:
Outer---modulus of elasticity in static bending 4.4GPa; Crooked breaking strength 49.8MPa; Fracture elongation 5.1%; Bending strength 54.9MPa; Impact strength 47.9KJm
-2Screw withdrawal force 348kg; Ultraviolet degradation speed 0.048mm/.
Core body---tensile strength 25.0MPa; Bending strength 18.0MPa; Impact strength 6.9KJm
-2
Embodiment six:
Step 1, raw material are prepared:
Earlier will raw materials usedly dry processing, for wheat powder of straw or senior pine powder require oven dry afterwards moisture content be not more than 3%;
A, internal layer core body raw material: material of main part weighing wheat powder of straw by weight percentage is 70%, and waste polyethylene and polypropylene plastics respectively are 15%, adds up to 100%; The polyethylene MAPE of weighing interpolation is 4.5% of a material of main part gross weight in addition, and zinc stearate is 2.0% of a material of main part gross weight.Earlier 70% wheat powder of straw is added 4.5% polyethylene MAPE, in mixer, handled 15 minutes, again in drying oven in 100 ℃ of dryings 20 minutes, carry out surface treatment, be reprocessed into 25 purposes and mix meal; Waste polyethylene and polypropylene plastics with 30% sorts, impurity elimination, cleaning, fragmentation;
B, outer raw material: the senior pine powder of material of main part weighing by weight percentage 100 purposes is 40%, and the polyethylene of new product and igelite respectively are 30%, adds up to 100%; The polyethylene MAPE that adds of weighing is 4.5% of a material of main part gross weight in addition, zinc stearate be the material of main part gross weight 2.0%, Al (OH)
3For the material of main part gross weight 1.8%, UV-T is 1.8% of material of main part gross weight.First senior pine powder with 40% adds 4.5% polyethylene MAPE, carries out surface treatment, is reprocessed into the senior thin wooden mixed powder of 100 purposes; New polyethylene with 60% and igelite clean, fragmentation;
Step 2, mixing granulation: the zinc stearate of the ready internal layer core body of step 1 material of main part adding 2.0% is put into mixing and blending machine mixing stirring; The ready outer material of main part of step 1 is added 2.0% zinc stearate, 1.8% Al (OH)
3Be, 1.8% UV-T, add together and mix stirring in the mixing and blending machine.Keeping mixing whipping temp is 85 ℃, and the mixing mixing time is 30min, and the internal layer core body and the outer mixed material that then this step are obtained are sent into the parallel double-screw comminutor respectively, carry out granulation, and prilling temperature is 170 ℃～180 ℃,
Step 3, extrusion molding, typing and cooling: the pellet of step 2 preparation is extruded at twice.Keeping extrusion temperature is 145 ℃～155 ℃, and extruded velocity is 1.5 meters/minute.And carrying out synchronous cooling processing, core body and skin all adopt water-cooled.
Step 4, traction and cutting: when carry out step 3, draw product continuously equably, according to actual needs length and specification cutting get final product.
Each main performance detected value of composite that present embodiment is made is as follows:
Outer---modulus of elasticity in static bending 5.9GPa; Crooked breaking strength 65.8MPa; Fracture elongation 5.7%; Bending strength 62.3MPa; Impact strength 43.5KJm
-2Screw withdrawal force 359kg; Ultraviolet degradation speed 0.043mm/.
Core body---tensile strength 22.8MPa; Bending strength 16.3MPa; Impact strength 4.3KJm
-2
In sum, the double-layer composite material that adopts method of the present invention to make, various performance parameters meets specification requirement, and the section bar that can make various sheet materials, stupefied material, tubing and special-shaped interface uses.
The present invention has the advantage of timber and plastics performance concurrently, has good combination property, can be rationally sharp Use natural resources, free from environmental pollution and good looking appearance has significant environmental benefit. In addition, this After bright Wood plastic composite expires under arms, can again pulverize, when the core body raw material uses, have and follow The characteristics that ring uses can not produce new environomental pollution source.
Claims (9)
1. double-layer plastic-wood composite material is characterized in that: comprise internal layer core body and skin,
Described internal layer core body is made up of coarse flour or agricultural stalk powder, waste or used plastics, coupling agent, lubricant, coarse flour or agricultural stalk powder are 60%～75% by weight percentage, waste or used plastics is 25%～40%, and the material of main part that coarse flour or agricultural stalk powder and waste or used plastics are formed adds up to 100%; Coupling agent is 1%～5% of a material of main part gross weight, and lubricant is 0.5%～5% of a material of main part gross weight,
Described skin is made up of pure wood powder, new product plastics, coupling agent, lubricant, function additive, and pure by weight percentage wood powder is 30%～50%, and the new product plastics are 50%～70%, and the material of main part that pure wood powder and new product plastics are formed adds up to 100%; Coupling agent is 1%～5% of a material of main part gross weight, function additive is 1%～5% of a material of main part gross weight, lubricant is 0.5%～5% of a material of main part gross weight, described function additive is made up of fire retardant and ultra-violet absorber, fire retardant and ultra-violet absorber are according to percentage by weight preparation in 1: 1, and outer layer thickness is more than or equal to 3mm.
2. double-layer plastic-wood composite material according to claim 1 is characterized in that: described coarse flour is selected wood shavings for use.
3. double-layer plastic-wood composite material according to claim 1 is characterized in that: described agricultural stalk powder is selected cotton stalk powder or wheat powder of straw for use.
4. double-layer plastic-wood composite material according to claim 1 is characterized in that: described plastics are selected one or both the mixing in polyethylene, polypropylene, the polyvinyl chloride for use.
5. double-layer plastic-wood composite material according to claim 1 is characterized in that: described coupling agent is selected maleic anhydride MA or polyethylene MAPE for use.
6. double-layer plastic-wood composite material according to claim 1 is characterized in that: described fire retardant is selected Al (OH) for use
3
7. double-layer plastic-wood composite material according to claim 1 is characterized in that: described ultra-violet absorber is selected UV-234 or UV-T for use.
8. double-layer plastic-wood composite material according to claim 1 is characterized in that: described lubricant is selected zinc stearate for use.
9. the manufacture method of the described double-layer plastic-wood composite material of claim 1 is characterized in that: adopt following processing step to implement,
Step 1, raw material are prepared:
Earlier will raw materials usedly dry processing, for wood powder or agricultural stalk powder require oven dry afterwards moisture content be not more than 3%;
A, internal layer core body: weighing by weight percentage: coarse flour or agricultural stalk powder are 60%～75%, and waste or used plastics is 25%～40%, and the material of main part that coarse flour or agricultural stalk powder and waste or used plastics are formed adds up to 100%; The weighing coupling agent is 1%～5% of a material of main part gross weight, and the weighing lubricant is 0.5%～5% of a material of main part gross weight; Earlier 1%～5% coupling agent is added in 60%～75% the coarse flour or agricultural stalk powder, carry out surface treatment, be reprocessed into 10～30 purposes and mix meal; Simultaneously 25%～40% waste or used plastics sorted, clean, fragmentation;
B, skin: weighing by weight percentage: pure wood powder is 30%～50%, and the new product plastics are 50%～70%, and the material of main part that pure wood powder and new product plastics are formed adds up to 100%; The weighing coupling agent is 1%～5% of a material of main part gross weight, the weighing function additive is 1%～5% of a material of main part gross weight, the weighing lubricant is 0.5%～5% of a material of main part gross weight, described function additive is made up of fire retardant and ultra-violet absorber, and fire retardant and ultra-violet absorber are according to percentage by weight preparation in 1: 1; Earlier 1%～5% coupling agent is joined in 30%～50% the pure wood powder, carry out surface treatment, be reprocessed into the senior thin wooden mixed powder of 80～150 purposes; Simultaneously 50%～70% new product plastics are cleaned, fragmentation;
Step 2, mixing granulation:
Lubricant mixing stirring with the ready internal layer core body of step 1 material of main part adding 0.5%～3.5%; With the lubricant of the ready outer material of main part adding 0.5%～3.5% of step 1 and 1%～5% function additive mixing stirring; Keeping mixing whipping temp is 80 ℃～100 ℃, and the mixing mixing time is 30min, and internal layer core body that then this step is obtained and outer mixed material carry out granulation respectively, and prilling temperature is 120 ℃～200 ℃;
Step 3, extrusion molding, typing and cooling:
The pellet of step 2 preparation is required to extrude the internal layer core body according to profile size earlier, carry out outer extrusion molding again, extrusion temperature is 130 ℃～170 ℃, and carries out synchronous cooling processing;
Step 4, traction and cutting:
When carry out step 3, draw product continuously equably, according to actual needs length and specification cutting get final product.
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| CNB2007100190970A CN100572007C (en) | 2007-11-19 | 2007-11-19 | A kind of double-layer plastic-wood composite material and manufacture method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102950859A (en) * | 2011-08-24 | 2013-03-06 | 耶普(苏州)塑技有限公司 | Wood plastic composite and processing technology thereof |
| CN102979268A (en) * | 2012-11-29 | 2013-03-20 | 张家港联冠环保科技有限公司 | Plastic-wood co-extruded plate |
| CN103909702A (en) * | 2012-12-31 | 2014-07-09 | 深圳市格林美高新技术股份有限公司 | Surface co-extruded PE plastic-wood profile and manufacturing process thereof |
| CN103909589B (en) * | 2012-12-31 | 2016-03-02 | 深圳市格林美高新技术股份有限公司 | A kind of manufacturing process of plastic-wood section |
| US9905887B2 (en) | 2012-06-05 | 2018-02-27 | Nec Corporation | Lithium secondary battery |
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2007
- 2007-11-19 CN CNB2007100190970A patent/CN100572007C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102950859A (en) * | 2011-08-24 | 2013-03-06 | 耶普(苏州)塑技有限公司 | Wood plastic composite and processing technology thereof |
| US9905887B2 (en) | 2012-06-05 | 2018-02-27 | Nec Corporation | Lithium secondary battery |
| CN102979268A (en) * | 2012-11-29 | 2013-03-20 | 张家港联冠环保科技有限公司 | Plastic-wood co-extruded plate |
| CN103909702A (en) * | 2012-12-31 | 2014-07-09 | 深圳市格林美高新技术股份有限公司 | Surface co-extruded PE plastic-wood profile and manufacturing process thereof |
| CN103909702B (en) * | 2012-12-31 | 2016-01-13 | 深圳市格林美高新技术股份有限公司 | Surface co-extrusion PE plastic-wood Materials And Manufacturing Processes |
| CN103909589B (en) * | 2012-12-31 | 2016-03-02 | 深圳市格林美高新技术股份有限公司 | A kind of manufacturing process of plastic-wood section |
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| Publication number | Publication date |
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| CN100572007C (en) | 2009-12-23 |
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Assignee: Zep long new material limited liability company Assignor: Xi'an University of Technology Contract record no.: 2010650000006 Denomination of invention: Double-layer plastic-wood composite material and preparation method thereof Granted publication date: 20091223 License type: Exclusive License Open date: 20080430 Record date: 20100527 |
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