CN103073906A - Polyethylene wood plastic and preparation method thereof - Google Patents
Polyethylene wood plastic and preparation method thereof Download PDFInfo
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- CN103073906A CN103073906A CN2013100447947A CN201310044794A CN103073906A CN 103073906 A CN103073906 A CN 103073906A CN 2013100447947 A CN2013100447947 A CN 2013100447947A CN 201310044794 A CN201310044794 A CN 201310044794A CN 103073906 A CN103073906 A CN 103073906A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92009—Measured parameter
- B29C2948/92019—Pressure
Abstract
The invention relates to a polyethylene wood plastic and a preparation method thereof and belongs to the technical field of plastic compound modifying processing. The invention provides a formula of the polyethylene wood plastic and a preparation method for a section bar; extruding temperature and extruding speed are increased; a polyethylene wood plastic section bar produced according to the preparation method has excellent high-temperature resistance; and according to the technical scheme, the polyethylene wood plastic comprises the following raw materials in parts by weight: 30-40 parts of polyethylene, 50-70 parts of wood flour, 0.5-2 parts of maleic anhydride grafted polyethylene, 0.8-1.5 parts of polyethylene wax, 1-3 parts of zinc stearate, 2-6 parts of toner, 0.5-1 part of antioxidant, 0.4-0.9 part of anti-ultraviolet light absorber UV-531 and 0.5-1.2 parts of stearic acids. The preparation method provided by the invention is suitable for the extruding molding of the polyethylene wood plastic section bar.
Description
Technical field
A kind of polyethylene wood-plastic of the present invention and preparation method thereof belongs to the composite modified processing technique field of plastics.
Background technology
The ecotope that the forest reserves are depended on for existence to protect mankind plays vital effect.China's wood consumption is very large, annual need just can satisfying the demand by more than 20 ten thousand mu of forests of felling.Because the felling of the forest reserves, the destruction of vegetation, ecotope goes from bad to worse, and the soil Desertification is increasingly sharpened.If build a wood-like plastics factory, then can produce in 1 year and to be equivalent to 1667m
3The Wood-plastic material of round log is equivalent to the approximately timber yield of 174 mu of forests.In order to preserve the ecological environment, people propose the slogan of " giving the descendants forest ", propose not deforestation requirement, as seen seek the significant of substitute for wood.Wood-plastic material can replace timber comprehensively, and to saving the national precious forest reserves, preserving the ecological environment has extremely far-reaching important meaning.
As a kind of novel wood substitute material, lignin plastics can be widely used in the fields such as building decoration and packing, such as corner line, wood shavings lath, curtain, door socket, floor, hedge, baseboard, fine arts plate, window shutter, picture frame, photo frame, window frame, toy and common wealth furniture articles for use etc., most indoor and outdoor decorative building materials all can be made with lignin plastics.It is worthy of note especially, Wood-plastic material has waterproof, fire-proof function, thereby can be used for the decoration of kitchen, washroom etc., and this be log can not and.Mould woodwork and now caused international extensive attention, be described as the environmental protection type material, be rich in development potentiality and wide prospect of the application.
Mould important a member of extended family as wood, the product of polyethylene wood-plastic mainly is take outdoor gardens construction as main, such as guardrail, floor, refuse container, Hua Chi, pallet etc.The polyethylene wood moulding material is being very outstanding aspect water-repellancy and the preservative property.Existing polyethylene wood-plastic production technology but, polyethylene wood-plastic section bar extrusion speed is slow, and the wall scroll production line output is not fully up to expectations.How improving the extruded velocity of polyethylene wood-plastic, is the problem that numerous Wood-plastic profiles manufacturer faces solution.And polyethylene wood-plastic itself also has the shortcoming of the yielding bending of high temperature or stress cracking.
Summary of the invention
The present invention provides a kind of polyethylene wood-plastic prescription and preparation method in order to overcome the deficiencies in the prior art, has improved extrusion temperature and extruded velocity, and the polyethylene wood plastic section bar of producing according to the present invention has excellent resistance to elevated temperatures.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: a kind of polyethylene wood-plastic, and the raw material that adopts is prepared according to following weight part:
Polyethylene 30-40 part, wood powder 50-70 part, maleic anhydride grafted polyethylene 0.5-2 part, polyethylene wax 0.8-1.5 part, Zinic stearas 1-3 part, toner 2-6 part, antioxidant 0.5-1 part, ultraviolet-resistant absorbent UV-531 0.4-0.9 part, stearic acid 0.5-1.2 part.
Described antioxidant is wherein a kind of of antioxidant 168, antioxidant 1010 or antioxidant B215.
Described antioxidant 168 is tricresyl phosphite [2,4-di-tert-butyl-phenyl] ester; Antioxidant 1010 is four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester; Antioxidant B215 is the synergistic mixture of antioxidant 168 and antioxidant 1010.
Described ultraviolet-resistant absorbent UV-531 is Octabenzone.
A kind of preparation method of polyethylene wood-plastic carries out according to following steps:
First described wood powder and polyethylene are sent into high-speed mixer heating mixing, when material temperature reaches 90 ℃-105 ℃, after adding again described maleic anhydride grafted polyethylene, polyethylene wax, Zinic stearas, toner, antioxidant, ultraviolet-resistant absorbent UV-531 and stearic acid mixing 5min, deliver to the parallel double-screw extruder extruding pelletization, the gained pellet is delivered to the conical double screw extruder extrusion moulding, behind cooling and shaping, obtain the finished product polyethylene wood-plastic; Wherein the minimum temperature of parallel double-screw extruder material fusion plastification is 135 ℃, and the temperature of extrusion neck ring mold is 150 ℃; The temperature of conical double screw extruder feed end is 250 ℃, and the temperature of extrusion neck ring mold is 190 ℃, and the temperature control between the two is successively decreased by feed end to extrusion neck ring mold gradient.
Described parallel double-screw extruder is divided into 9 temperature ranges from feed end to extrusion neck ring mold, and the temperature of each temperature range is as follows:
140 ℃-145 ℃ in 1 district, 140 ℃ in 2 districts, 135 ℃-140 ℃ in 3 districts, 140 ℃-143 ℃ in 4 districts, 140 ℃-143 ℃ in 5 districts, 144 ℃ in 6 districts, 145 ℃ in 7 districts, 145 ℃-148 ℃ in 8 districts, 148 ℃-150 ℃ in 9 districts.
The extrusion die of described conical double screw extruder adopts the oil cooling temperature control.
The beneficial effect that the present invention compared with prior art has is.
1. the granulating extruder of the present invention's employing has nine warm areas, and material plasticizing and mixing are more even, and the polyethylene material ground that follow-up workshop section is extruded is more even, and mechanical property is better.
2. the present invention adopts antioxidant 168 and antioxidant 1010 to be used in conjunction with, and has greatly improved the oxidation resistant ability of polyethylene wood-plastic.
3. the extrusion temperature of common polythene Wood-plastic profiles is at 170-180 ℃, and extrusion temperature of the present invention is 190 ℃, is higher than common polythene wood and moulds extrusion temperature 10-20 ℃, and the high temperature resistant deformability of products obtained therefrom is good.
4. the present invention adopts higher extrusion temperature, has improved the extruded velocity of polyethylene wood-plastic, has namely improved production efficiency.
5. extruder die head of the present invention adopts the oil cooling temperature control, and die temperature is stable, and the polyethylene wood-plastic performance of production is more stable.
The effect of auxiliary agent in the prescription: maleic anhydride grafted polyethylene is coupling agent, improves the consistency of polyethylene and wood powder, can increase the counter-bending surging force of product; Polyethylene wax is internal lubricant, increases the flowability of molten materials; Zinic stearas is external lubricant and stablizer, reduces the resistance to flow between molten materials and forcing machine barrel and the screw rod, and guarantees the stability of polyethylene molecule under the high temperature; Antioxidant improves polyethylene wood plastic section bar efflorescence prevention and aging-resistant ability, prolongs the work-ing life of section bar; Ultraviolet-resistant absorbent UV-531 can prevent that the section bar that solar radiation causes from fading; Stearic acid is cold resistant plasticizer and lubricant.
Used auxiliary agent originates from Qingdao match promise novel material company limited among the present invention.
Embodiment
The invention will be further described below in conjunction with specific embodiment.
Embodiment 1
A kind of polyethylene wood-plastic, the raw material that adopts is prepared according to following weight part:
35 parts of polyethylene, 60 parts of wood powders, 1.5 parts of maleic anhydride grafted polyethylenes, 0.8 part of polyethylene wax, 2 parts of Zinic stearass, 2 parts of toners, 0.8 part of antioxidant, 0.6 part of ultraviolet-resistant absorbent UV-531,0.8 part of stearic acid.
Described antioxidant is antioxidant 168, i.e. tricresyl phosphite [2,4-di-tert-butyl-phenyl] ester.
Described ultraviolet-resistant absorbent UV-531 is Octabenzone.
A kind of preparation method of polyethylene wood-plastic carries out according to following steps:
First described wood powder and polyethylene are sent into high-speed mixer heating mixing, when material temperature reaches 90 ℃, after adding again described maleic anhydride grafted polyethylene, polyethylene wax, Zinic stearas, toner, antioxidant, ultraviolet-resistant absorbent UV-531 and stearic acid mixing 5min, deliver to the parallel double-screw extruder extruding pelletization, the gained pellet is delivered to the conical double screw extruder extrusion moulding, behind cooling and shaping, obtain the finished product polyethylene wood-plastic; Wherein the minimum temperature of parallel double-screw extruder material fusion plastification is 135 ℃, and the temperature of extrusion neck ring mold is 150 ℃; The temperature of conical double screw extruder feed end is 250 ℃, and the temperature of extrusion neck ring mold is 190 ℃, and the temperature control between the two is successively decreased by feed end to extrusion neck ring mold gradient.
Described parallel double-screw extruder is divided into 9 temperature ranges from feed end to extrusion neck ring mold, and the temperature of each temperature range is as follows:
140 ℃-145 ℃ in 1 district, 140 ℃ in 2 districts, 135 ℃-140 ℃ in 3 districts, 140 ℃-143 ℃ in 4 districts, 140 ℃-143 ℃ in 5 districts, 144 ℃ in 6 districts, 145 ℃ in 7 districts, 145 ℃-148 ℃ in 8 districts, 148 ℃-150 ℃ in 9 districts.
The extrusion die of described conical double screw extruder adopts the oil cooling temperature control.
Embodiment 2
A kind of polyethylene wood-plastic, the raw material that adopts is prepared according to following weight part:
30 parts of polyethylene, 50 parts of wood powders, 0.5 part of maleic anhydride grafted polyethylene, 1 part of polyethylene wax, 1 part of Zinic stearas, 3 parts of toners, 0.5 part of antioxidant, 0.5 part of ultraviolet-resistant absorbent UV-531,1 part of stearic acid.
Described antioxidant is antioxidant 168, i.e. tricresyl phosphite [2,4-di-tert-butyl-phenyl] ester.
Described ultraviolet-resistant absorbent UV-531 is Octabenzone.
A kind of preparation method of polyethylene wood-plastic carries out according to following steps:
First described wood powder and polyethylene are sent into high-speed mixer heating mixing, when material temperature reaches 95 ℃, after adding again described maleic anhydride grafted polyethylene, polyethylene wax, Zinic stearas, toner, antioxidant, ultraviolet-resistant absorbent UV-531 and stearic acid mixing 5min, deliver to the parallel double-screw extruder extruding pelletization, the gained pellet is delivered to the conical double screw extruder extrusion moulding, behind cooling and shaping, obtain the finished product polyethylene wood-plastic; Wherein the minimum temperature of parallel double-screw extruder material fusion plastification is 135 ℃, and the temperature of extrusion neck ring mold is 150 ℃; The temperature of conical double screw extruder feed end is 250 ℃, and the temperature of extrusion neck ring mold is 190 ℃, and the temperature control between the two is successively decreased by feed end to extrusion neck ring mold gradient.
Described parallel double-screw extruder is divided into 9 temperature ranges from feed end to extrusion neck ring mold, and the temperature of each temperature range is as follows:
140 ℃-145 ℃ in 1 district, 140 ℃ in 2 districts, 135 ℃-140 ℃ in 3 districts, 140 ℃-143 ℃ in 4 districts, 140 ℃-143 ℃ in 5 districts, 144 ℃ in 6 districts, 145 ℃ in 7 districts, 145 ℃-148 ℃ in 8 districts, 148 ℃-150 ℃ in 9 districts.
The extrusion die of described conical double screw extruder adopts the oil cooling temperature control.
Embodiment 3
A kind of polyethylene wood-plastic, the raw material that adopts is prepared according to following weight part:
40 parts of polyethylene, 70 parts of wood powders, 2 parts of maleic anhydride grafted polyethylenes, 1.5 parts of polyethylene waxs, 3 parts of Zinic stearass, 6 parts of toners, 1 part of antioxidant, 0.9 part of ultraviolet-resistant absorbent UV-531,1.2 parts of stearic acid.
Described antioxidant is antioxidant B215.
The synergistic mixture that described antioxidant B215 is antioxidant 168 and antioxidant 1010.
Described ultraviolet-resistant absorbent UV-531 is Octabenzone.
A kind of preparation method of polyethylene wood-plastic carries out according to following steps:
First described wood powder and polyethylene are sent into high-speed mixer heating mixing, when material temperature reaches 99 ℃, after adding again described maleic anhydride grafted polyethylene, polyethylene wax, Zinic stearas, toner, antioxidant, ultraviolet-resistant absorbent UV-531 and stearic acid mixing 5min, deliver to the parallel double-screw extruder extruding pelletization, the gained pellet is delivered to the conical double screw extruder extrusion moulding, behind cooling and shaping, obtain the finished product polyethylene wood-plastic; Wherein the minimum temperature of parallel double-screw extruder material fusion plastification is 135 ℃, and the temperature of extrusion neck ring mold is 150 ℃; The temperature of conical double screw extruder feed end is 250 ℃, and the temperature of extrusion neck ring mold is 190 ℃, and the temperature control between the two is successively decreased by feed end to extrusion neck ring mold gradient.
Described parallel double-screw extruder is divided into 9 temperature ranges from feed end to extrusion neck ring mold, and the temperature of each temperature range is as follows:
140 ℃-145 ℃ in 1 district, 140 ℃ in 2 districts, 135 ℃-140 ℃ in 3 districts, 140 ℃-143 ℃ in 4 districts, 140 ℃-143 ℃ in 5 districts, 144 ℃ in 6 districts, 145 ℃ in 7 districts, 145 ℃-148 ℃ in 8 districts, 148 ℃-150 ℃ in 9 districts.
The extrusion die of described conical double screw extruder adopts the oil cooling temperature control.
Embodiment 4
A kind of polyethylene wood-plastic, the raw material that adopts is prepared according to following weight part:
35 parts of polyethylene, 65 parts of wood powders, 1.5 parts of maleic anhydride grafted polyethylenes, 1.2 parts of polyethylene waxs, 2 parts of Zinic stearass, 5 parts of toners, 0.8 part of antioxidant, 0.8 part of ultraviolet-resistant absorbent UV-531,0.5 part of stearic acid.
Described antioxidant is antioxidant 1010, i.e. four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester.
Described ultraviolet-resistant absorbent UV-531 is Octabenzone.
A kind of preparation method of polyethylene wood-plastic carries out according to following steps:
First described wood powder and polyethylene are sent into high-speed mixer heating mixing, when material temperature reaches 102 ℃, after adding again described maleic anhydride grafted polyethylene, polyethylene wax, Zinic stearas, toner, antioxidant, ultraviolet-resistant absorbent UV-531 and stearic acid mixing 5min, deliver to the parallel double-screw extruder extruding pelletization, the gained pellet is delivered to the conical double screw extruder extrusion moulding, behind cooling and shaping, obtain the finished product polyethylene wood-plastic; Wherein the minimum temperature of parallel double-screw extruder material fusion plastification is 135 ℃, and the temperature of extrusion neck ring mold is 150 ℃; The temperature of conical double screw extruder feed end is 250 ℃, and the temperature of extrusion neck ring mold is 190 ℃, and the temperature control between the two is successively decreased by feed end to extrusion neck ring mold gradient.
Described parallel double-screw extruder is divided into 9 temperature ranges from feed end to extrusion neck ring mold, and the temperature of each temperature range is as follows:
140 ℃-145 ℃ in 1 district, 140 ℃ in 2 districts, 135 ℃-140 ℃ in 3 districts, 140 ℃-143 ℃ in 4 districts, 140 ℃-143 ℃ in 5 districts, 144 ℃ in 6 districts, 145 ℃ in 7 districts, 145 ℃-148 ℃ in 8 districts, 148 ℃-150 ℃ in 9 districts.
The extrusion die of described conical double screw extruder adopts the oil cooling temperature control.
Embodiment 5
A kind of polyethylene wood-plastic, the raw material that adopts is prepared according to following weight part:
40 parts of polyethylene, 50 parts of wood powders, 1.2 parts of maleic anhydride grafted polyethylenes, 1.5 parts of polyethylene waxs, 2 parts of Zinic stearass, 2 parts of toners, 0.5 part of antioxidant, 0.4 part of ultraviolet-resistant absorbent UV-531,0.8 part of stearic acid.
Described antioxidant is antioxidant B215.
The synergistic mixture that described antioxidant B215 is antioxidant 168 and antioxidant 1010.
Described ultraviolet-resistant absorbent UV-531 is Octabenzone.
A kind of preparation method of polyethylene wood-plastic carries out according to following steps:
First described wood powder and polyethylene are sent into high-speed mixer heating mixing, when material temperature reaches 105 ℃, after adding again described maleic anhydride grafted polyethylene, polyethylene wax, Zinic stearas, toner, antioxidant, ultraviolet-resistant absorbent UV-531 and stearic acid mixing 5min, deliver to the parallel double-screw extruder extruding pelletization, the gained pellet is delivered to the conical double screw extruder extrusion moulding, behind cooling and shaping, obtain the finished product polyethylene wood-plastic; Wherein the minimum temperature of parallel double-screw extruder material fusion plastification is 135 ℃, and the temperature of extrusion neck ring mold is 150 ℃; The temperature of conical double screw extruder feed end is 250 ℃, and the temperature of extrusion neck ring mold is 190 ℃, and the temperature control between the two is successively decreased by feed end to extrusion neck ring mold gradient.
Described parallel double-screw extruder is divided into 9 temperature ranges from feed end to extrusion neck ring mold, and the temperature of each temperature range is as follows:
140 ℃-145 ℃ in 1 district, 140 ℃ in 2 districts, 135 ℃-140 ℃ in 3 districts, 140 ℃-143 ℃ in 4 districts, 140 ℃-143 ℃ in 5 districts, 144 ℃ in 6 districts, 145 ℃ in 7 districts, 145 ℃-148 ℃ in 8 districts, 148 ℃-150 ℃ in 9 districts.
The extrusion die of described conical double screw extruder adopts the oil cooling temperature control.
The present invention can summarize with other the specific form without prejudice to spirit of the present invention or principal character.Therefore, no matter from which point, above-mentioned embodiment of the present invention all can only be thought can not limit invention to explanation of the present invention, claims have been pointed out scope of the present invention, and scope of the present invention is not pointed out in above-mentioned explanation, therefore, in the implication suitable with claims of the present invention and any variation in the scope, all should think to be included in the scope of claims.
Claims (5)
1. polyethylene wood-plastic is characterized in that the raw material that adopts prepares according to following weight part:
Polyethylene 30-40 part, wood powder 50-70 part, maleic anhydride grafted polyethylene 0.5-2 part, polyethylene wax 0.8-1.5 part, Zinic stearas 1-3 part, toner 2-6 part, antioxidant 0.5-1 part, ultraviolet-resistant absorbent UV-531 0.4-0.9 part, stearic acid 0.5-1.2 part.
2. a kind of polyethylene wood-plastic according to claim 1 is characterized in that described antioxidant is wherein a kind of of antioxidant 168, antioxidant 1010 or antioxidant B215.
3. the preparation method of a polyethylene wood-plastic claimed in claim 1 is characterized in that carrying out according to following steps:
First described wood powder and polyethylene are sent into high-speed mixer heating mixing, when material temperature reaches 90 ℃-105 ℃, after adding again described maleic anhydride grafted polyethylene, polyethylene wax, Zinic stearas, toner, antioxidant, ultraviolet-resistant absorbent UV-531 and stearic acid mixing 5min, deliver to the parallel double-screw extruder extruding pelletization, the gained pellet is delivered to the conical double screw extruder extrusion moulding, behind cooling and shaping, obtain the finished product polyethylene wood-plastic; Wherein the working temperature of parallel double-screw extruder is 135 ℃-150 ℃, and the working temperature of conical double screw extruder is 190 ℃-250 ℃.
4. the preparation method of a kind of polyethylene wood-plastic according to claim 3 is characterized in that described parallel double-screw extruder is divided into 9 temperature ranges, and each interval temperature is:
140 ℃-145 ℃ in 1 district, 140 ℃ in 2 districts, 135 ℃-140 ℃ in 3 districts, 140 ℃-143 ℃ in 4 districts, 140 ℃-143 ℃ in 5 districts, 144 ℃ in 6 districts, 145 ℃ in 7 districts, 145 ℃-148 ℃ in 8 districts, 148 ℃-150 ℃ in 9 districts.
5. the preparation method of a kind of polyethylene wood-plastic according to claim 3 is characterized in that the extrusion die of described conical double screw extruder adopts the oil cooling temperature control.
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