CN105713403A - Wood-plastic composite and preparation method for special-shape molded member thereof - Google Patents
Wood-plastic composite and preparation method for special-shape molded member thereof Download PDFInfo
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Abstract
The invention provides a wood-plastic composite. The wood plastic composite comprises a biomass material and a plastic; the biomass material is wooden fiber with a length of 0.1 to 4.0 nm and a length-diameter ratio of 1: 1 to 400: 1; and in virtue of the characteristic of the large length-diameter ratio and low possibility of flowing of the wooden fiber, filling effect and reinforcing effect are exerted on the wood plastic composite, so the mechanical properties of the wood plastic composite are substantially improved and in particular, resistance to impact and creep and other performance of the wood plastic composite are improved, which enables the application scope of the wood plastic composite to be broadened. When a molding process is employed for preparation of the molded member of the wood plastic composite, the thickness and mechanical properties of the molded member can be improved and preparation of the special-shape molded member can be realized; and the advantages of low cost and good market application prospect are obtained.
Description
Technical field
The invention belongs to wood plastic composite processing technique field, the preparation method particularly to a kind of wood plastic composite and Special-shaped moulded product thereof is special-shaped.
Background technology
Wood plastic composite is a kind of is the composite that primary raw material prepares by agricultural-forestry biomass resource and plastics, and the advantage having timber and plastics concurrently, its product is mainly used as the succedaneum of timber or plastics.Development and application wood plastic composite has great importance in the pressure that waste ' s reclamation, environmental conservation and alleviation natural timber day are becoming tight.
At present, the method producing wood plastic composite mainly has extrusion, injection and mold pressing three kinds.Injection moulding is capable of the production of the low wood plastic composite of wood substance component content, but can only produce little special-shaped product.Compression molding (also referred to as hot-forming) receives publicity because it is capable of the productive prospecting of the high wood plastic composite of wood substance component content and applies.
Publication No. is the manufacture method that the Chinese patent application of CN102367319A discloses a kind of wood-plastic door sheet, it is sent directly into hot press after adopting the granule that wooden powder, foaming agent, stearic acid, Tissuemat E, polyvinyl chloride resin and calcium powder grind to form 40～80 orders to emboss, last cooling and shaping prepares wood-plastic door sheet, has the advantages such as the production technology demoulding simple, easily operated, easy, power and energy saving.But, this molding mode there will be the situation that batch mixing is uneven, and the wood-plastic door sheet prepared is the simple plane of shape matching.
Publication No. be CN102140255A, CN102181167A and CN103772805A Chinese patent solve the problem that in above-mentioned forming method, batch mixing is uneven, by wood powder, plastic resin and various processing aid, first in high-speed mixer, mixing prepares compound, then mixing in double; two roller mill/plasticators, last compression molding prepares wood plastic composite.But, using wood powder as raw material in above-mentioned patent, wood powder has mobility, wood plastic composite is only played " filling " effect by it, and without " enhancing " effect, therefore the mechanical property of wood plastic composite is poor, and especially the performance such as shock resistance and creep resistant is to be improved, and the strength of materials is had the range of application in the engineering field of particular/special requirement by significantly limiting wood plastic composite at some by this；Additionally, when adopting wood powder as raw material, the thickness of profiled member prepared by die press technology for forming is restricted, therefore wood plastic composite mold pressing is generally utilized to make the regular product of the low thickness such as plate, strip at present, and the method that there is no meets the application of high thickness requirements, wood plastic composite is such as utilized to prepare Special-shaped moulded part etc., and for producing not yet with the special-shaped product of engraving shape, hollow out shape or curved surface decorative pattern etc., which has limited wood plastic composite application in replacing solid wood profiled piece goods or plastic shaped goods etc..
Summary of the invention
For the present situation of above-mentioned wood plastic composite, the invention provides a kind of special-shaped wood plastic composite, it has good mechanical property, for instance good shock resistance and creep-resistant property etc..
The technical solution adopted in the present invention is: a kind of wood plastic composite, including biological material and plastics, it is characterized in that: described biological material is the wood fiber, and its length is 0.1mm～4.0mm, and its draw ratio is 1:1～400:1.
Described wood fiber source is not limit, and is made through defibrator process or Steam explosion treatment including by saw branch, chips, wood flour, the wooden the like waste of wood shavings.As preferably, the draw ratio of the described wood fiber is 10:1～100:1.
Described plastics source is not limit, it is possible to be waste and old reclaimed materials etc..Described plastic components is not limit, it is possible to be a kind of in the thermoplastics such as PE, PP, PVC, ABS, PC or or two or more composite material.
As the preferred implementation of one, by percentage to the quality, described wood plastic composite consists of the following composition abnormal shape:
The wood fiber 45%～70%, its length is 0.1mm～4.0mm, and draw ratio is 1:1～400:1
Plastics 20%～50%
Coupling agent 1%～5%
Lubricant 1%～5%
Inorganic filler 1%～10%
Color masterbatch 0.1～1%
Other function additives 0～4%.
Described coupling agent includes but not limited to one or more the composite material in titanate coupling agent, silane coupler, maleic anhydride graft plastic resin, maleic anhydride-resin monomer copolymer etc..
Described lubricant includes but not limited to one or more the composite material in methyl-silicone oil, Tissuemat E, stearic acid, stearate etc..
Described inorganic filler includes but not limited to one or more the composite material in calcium carbonate, white carbon, Pulvis Talci, clay, Muscovitum etc..
Other described function additive includes but not limited to one or more the mixture in plasticizer, stabilizer, antioxidant etc., and wherein plasticizer is preferably the one in dioctyl phthalate, epoxy soybean oil, chlorinated paraffin, dibutyl phthalate etc.；Stabilizer is preferably calcium-zinc composite stabilizing agent or barium zinc stabilizer etc.；Antioxidant is preferably phenolic antioxidant (1010) etc..
A kind of method that present invention also offers Special-shaped moulded part preparing above-mentioned wood plastic composite, as it is shown in figure 1, comprise the steps:
(1) selecting length is 0.1mm～4.0mm, and draw ratio is the wood fiber of 1:1～400:1, and this wood fiber is dried process, controls its moisture content 4%～6%, to remove the moisture in the wood fiber, increases the interface compatibility of the wood fiber and plastics；
Described drying mode is not limit, one or more the mixing in including forced air drying, cylinder dry, vacuum drying etc..
(2) wood fiber after step (1) process, plastics and other raw materials being added in high-speed mixer by following weight/mass percentage composition, mix homogeneously prepares compound:
As a kind of optimal way, described raw material is made up of the wood fiber, waste or used plastics, coupling agent, lubricant, inorganic filler, color masterbatch and other function additive, and its weight/mass percentage composition is as follows:
The wood fiber 45%～70%
Plastics 20%～50%
Coupling agent 1%～5%
Lubricant 1%～5%
Inorganic filler 1%～10%
Color masterbatch 0.1～1%
Other function additives 0～4%.
As preferably, mixing temperature controls at 100 DEG C～110 DEG C, mixed at high speed 10min～25min.
(3) add mixture in parallel double-screw extruder, barrel temperature be carry out under 150～170 DEG C of conditions plastifying, mixing, extrusion, pelletize, cooling, obtain compound particle；As preferably, screw speed is 60～90r/min.
(4) compound particle is mated formation carry out hot-forming on xenotype mold, subsequently into cooling, obtain special-shaped Wood-plastic mould pressing goods.As preferably, hot pressing temperature is 175～190 DEG C, and hot pressing pressure is 8～20MPa.As preferably, the dwell time is 1～10min.
As preferably, prepared special-shaped Wood-plastic mould pressing goods abnormal shape being carried out post processing, described post processing includes but not limited to health preserving process, sanding process, imitation wood process etc..
Compared with prior art, present invention have the advantage that
(1) wood powder in wood plastic composite is improved to the wood fiber, compared with wood powder, wood fiber material has big draw ratio, not runny feature, not only wood plastic composite is played " filling " effect, but also plays " enhancing " effect, substantially increase the mechanical property of wood plastic composite, especially improve its performance such as shock resistance and creep resistant, thus having widened the range of application of wood plastic composite；
(2) when the molding utilizing mould pressing process to prepare this wood plastic composite, owing to adopting the wood fiber as raw material, compression molding process not easily flows, be conducive to the adhesion effect with plastics and other raw materials, thus substantially increasing the mechanical property of molding, especially its performance such as shock resistance and creep resistant；And owing to reducing the interface motion of molding, be conducive to improving the thickness of molding, it is thus possible to realize the preparation of Special-shaped moulded part, such as prepare the special-shaped product with engraving shape, hollow out shape or curved surface decorative pattern etc., the cost of this abnormal shape product is low, solid wood special-shaped component and plastic shaped product can be replaced, there is good market application foreground.
(3) plastic raw materials adopted in the present invention can be waste and old recycled plastic, the plastics that composition is single can be made, it can also be the mixed plastic with Multiple components, therefore can either improve waste or used plastics resource utilization rate, economize on resources, turn waste into wealth, can also reduce and reclaimed materials is classified, check required cost, thus have a good application prospect.
Accompanying drawing explanation
Fig. 1 is the Making programme figure that Special-shaped moulded wood of the present invention moulds that product is special-shaped；
Fig. 2 is the pictorial diagram that product moulded by the Special-shaped moulded wood prepared in the embodiment of the present invention 1.
Detailed description of the invention
Below in conjunction with attached Example, the present invention is described in further detail, it should be pointed out that embodiment described below is intended to be easy to the understanding of the present invention, and it does not play any restriction effect.
Embodiment 1:
In the present embodiment, Special-shaped moulded wood plastic product is book size is 500mm × 500mm, is highly the receiver of 100mm, and the preparation method of this Special-shaped moulded wood plastic product is as follows:
Form by the configuration of following materials in percentage by mass:
The following is concrete making step:
(1) dried
Selection length is 0.1～4.0mm, draw ratio is the wood fiber 820g of 10:1～100:1, utilizes roller drier that this wood fiber raw material is dried process, controls its moisture content 5%, to remove the moisture of the wood fiber, increase the interface compatibility of the wood fiber and waste or used plastics；
(2) mixed at high speed
The wood fiber after step (1) process, waste or used plastics polyethylene, coupling agent, lubricant, inorganic filler, color masterbatch and other function additive are added in high-speed mixer by following mass percent, mix homogeneously prepares compound, temperature controls at 100 DEG C, mixed at high speed 20min:
The wood fiber 65%
Waste or used plastics polyethylene 25%
Coupling agent maleic anhydride grafted polyethylene 2.5%
Lubricant methyl-silicone oil 1%
Inorganic filler calcium carbonate 4%
Color masterbatch 0.5%
Stabilizer barium zinc stabilizer 1%
Plasticizer epoxy soybean oil 1%；
(3) extrusion, pelletize
Add mixture in parallel double-screw extruder, be 160 DEG C at barrel temperature, the rotating speed of screw rod be carry out under 80r/min plastifying, mixing, extrusion, pelletize, cooling, obtain compound particle 1150g；
(4) compression molding
Weighing compound particle 400g to mat formation on this xenotype mold, carry out hot-forming on hot press, hot pressing temperature is 180 DEG C, molding pressure is 12MPa, dwell time is 6min, subsequently into being cooled to less than 50 DEG C in bosh, obtains special-shaped Wood-plastic mould pressing goods；
(5) post processing
The special-shaped Wood-plastic mould pressing goods of above-mentioned molding are carried out post processing, is generally the health preserving process of moulded parts, sanding process, imitation wood process etc..
Fig. 2 is the pictorial diagram that Special-shaped moulded goods moulded by above-mentioned prepared wood, and the hot strength of these goods is 14.6MPa after tested, and cantilever beam unnotched impact strength is 14.23KJ/m2, 24h water absorption rate is 2.02%, and expansion rate of water absorption is 0.86%.
Embodiment 2:
In the present embodiment, the shape of Special-shaped moulded wood plastic product is identical with example 1 with book size.The preparation method of this Special-shaped moulded wood plastic product is as follows:
(1) dried
Selection length is 0.1～4.0mm, draw ratio is the wood fiber raw material 525g of 10:1～100:1, utilizes blast drier that the wood fiber is dried process, controls its moisture content 4%, to remove the moisture of the wood fiber, increase the interface compatibility of the wood fiber and waste or used plastics；
(2) mixed at high speed
The wood fiber after step (1) process, waste or used plastics polyethylene, coupling agent, lubricant, inorganic filler, color masterbatch and other function additive are added in high-speed mixer by following mass percent, mix homogeneously prepares compound, temperature controls at 105 DEG C, mixed at high speed 15min:
The wood fiber 61%
Waste or used plastics polyethylene 29%
Coupling agent maleic anhydride grafted polyethylene 2%
Lubricant polyethylene wax 1%
Inorganic filler Pulvis Talci 4.5%
Color masterbatch 0.5%
Stabilizer barium zinc stabilizer 1%
Plasticizer phthalic acid dibutyl ester 1%；
(3) extrusion, pelletize
Add mixture in parallel double-screw extruder, be 155 DEG C at barrel temperature, the rotating speed of screw rod be carry out under 85r/min plastifying, mixing, extrusion, pelletize, cooling, obtain compound particle 1155g；
(4) compression molding
Weighing compound particle 400g to mat formation on this xenotype mold, carry out hot-forming on hot press, hot pressing temperature is 185 DEG C, molding pressure 10MPa, dwell time 5min, and rear entrance in bosh is cooled to less than 50 DEG C, obtains special-shaped Wood-plastic mould pressing goods；
(5) post processing
The special-shaped Wood-plastic mould pressing goods of above-mentioned molding are carried out post processing, is generally the health preserving process of moulded parts, sanding process, imitation wood process etc..
After tested, the hot strength that Special-shaped moulded goods moulded by special-shaped above-mentioned prepared wood is 15.8MPa, and cantilever beam unnotched impact strength is 15.76KJ/m2, 24h water absorption rate is 2.32%, and expansion rate of water absorption is 0.91%.
Embodiment 3:
In the present embodiment, the shape of Special-shaped moulded wood plastic product is identical with example 1 with book size.The preparation method of this Special-shaped moulded wood plastic product is as follows:
(1) dried
Selection length is 0.1～4.0mm, draw ratio is the special-shaped wood fiber raw material 755g of 10:1～100:1, utilizes roller drier that the wood fiber is dried process, controls its moisture content 5%, to remove the moisture of the wood fiber, increase the interface compatibility of the wood fiber and waste or used plastics；
(2) mixed at high speed
The wood fiber after step (1) process, waste or used plastics polyethylene and polypropylene, coupling agent, lubricant, inorganic filler, color masterbatch and other function additive are added in high-speed mixer by following mass percent, mix homogeneously prepares compound, temperature controls at 110 DEG C, mixed at high speed 10min:
The wood fiber 60%
Waste or used plastics polyethylene and polypropylene 30%
Coupling agent maleic anhydride grafted polyethylene 2.5%
Lubricant methyl-silicone oil 1%
Inorganic filler clay 4%
Color masterbatch 0.5%
Stabilizer calcium-zinc composite stabilizing agent 1%
Plasticizer epoxy soybean oil 1%
(3) extrusion, pelletize
Add mixture in parallel double-screw extruder, be 165 DEG C at barrel temperature, the rotating speed of screw rod be carry out under 70r/min plastifying, mixing, extrusion, pelletize, cooling, obtain compound particle 1145g；
(4) compression molding
Weighing compound particle 400g to mat formation on mould, carry out hot-forming on hot press, hot pressing temperature is 180 DEG C, and molding pressure is 10MPa, and the dwell time is 5min, subsequently into being cooled to less than 50 DEG C in bosh, obtains special-shaped Wood-plastic mould pressing goods；
(5) post processing
The special-shaped Wood-plastic mould pressing goods of above-mentioned molding are carried out post processing, is generally the health preserving process of moulded parts, sanding process, imitation wood process etc..
After tested, the hot strength of above-mentioned prepared special-shaped Wood-plastic mould pressing goods is 13.9MPa to abnormal shape, and cantilever beam unnotched impact strength is 13.88KJ/m2, 24h water absorption rate is 1.98%, and expansion rate of water absorption is 0.82%.
Technical scheme has been described in detail by embodiment described above, it it should be understood that and the foregoing is only specific embodiments of the invention, it is not limited to the present invention, all make in the spirit of the present invention any amendment, supplement or similar replacement etc., should be included within the scope of the present invention.
Claims (10)
1. a wood plastic composite, including biological material and plastics, is characterized in that: described biological material is the wood fiber, its length is 0.1mm～4.0mm, and draw ratio is 1:1～400:1.
2. wood plastic composite as claimed in claim 1, is characterized in that: described plastics are waste and old recycled plastics.
3. wood plastic composite as claimed in claim 1, is characterized in that: described plastics are one or more the composite materials in PE, PP, PVC, ABS, PC thermoplastic.
4. wood plastic composite as claimed in claim 1, is characterized in that: by percentage to the quality, and described wood plastic composite consists of the following composition:
The wood fiber 45%～70%
Plastics 20%～50%
Coupling agent 1%～5%
Lubricant 1%～5%
Inorganic filler 1%～10%
Color masterbatch 0.1～1%
Other function additives 0～4%.
5. wood plastic composite as claimed in claim 4, is characterized in that: described coupling agent is one or more the composite material in titanate coupling agent, silane coupler, maleic anhydride graft plastic resin, maleic anhydride-resin monomer copolymer.
6. wood plastic composite as claimed in claim 4, is characterized in that: described lubricant is one or more the composite material in methyl-silicone oil, Tissuemat E, stearic acid, stearate.
7. wood plastic composite as claimed in claim 4, is characterized in that: described inorganic filler is one or more the composite material in calcium carbonate, white carbon, Pulvis Talci, clay, Muscovitum.
8. wood plastic composite as claimed in claim 4, is characterized in that: other described function additive is one or more the mixture in plasticizer, stabilizer, antioxidant.
9. the preparation method of the different in nature moulded parts of the wood plastic composite as described in any claim in claim 1 to 8, is characterized in that: comprise the steps:
(1) selecting length is 0.1mm～4.0mm, and draw ratio is the wood fiber of 1:1～400:1, and this wood fiber is dried process, controls its moisture content 4%～6%；
(2) wood fiber after step (1) process, plastics and other raw materials being added in high-speed mixer by following weight/mass percentage composition, mix homogeneously prepares compound:
(3) add mixture in parallel double-screw extruder, barrel temperature be under 150～170 DEG C of conditions under carry out plastifying, mixing, extrusion, pelletize, cooling, obtain compound particle；Screw speed is preferably 60～90r/min；
(4) compound particle is mated formation carry out hot-forming on xenotype mold, subsequently into cooling, obtain special-shaped Wood-plastic mould pressing goods；Hot pressing temperature is preferably 175～190 DEG C, and hot pressing pressure is preferably 8～20MPa；Dwell time is preferably 1～10min.
10. the preparation method of the Special-shaped moulded product of wood plastic composite as claimed in claim 9, it is characterized in that: prepared special-shaped Wood-plastic mould pressing goods are carried out post processing, described post processing includes one or more in health preserving process, sanding process, imitation wood process.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106243542A (en) * | 2016-09-13 | 2016-12-21 | 北华大学 | A kind of production method of Radwood relief goods |
| CN106752006A (en) * | 2016-12-22 | 2017-05-31 | 杨常成 | A kind of preparation method of wood-plastic composite panel |
| CN107674310A (en) * | 2017-10-31 | 2018-02-09 | 桂林市漓江机电制造有限公司 | A kind of fibre-reinforced imitated wood material |
| CN108724420A (en) * | 2016-09-22 | 2018-11-02 | 长泰惠龙新材料科技有限公司 | A kind of preparation method of environment protection pressed-fibre board |
| CN108795081A (en) * | 2017-05-01 | 2018-11-13 | 张家界恒林生态木有限公司 | A kind of environment-friendlywood-plastic wood-plastic composite material and preparation method thereof |
| CN108948774A (en) * | 2018-08-31 | 2018-12-07 | 邳州市金丰木质纤维粉有限公司 | A kind of preparation method of wood fiber powder |
| CN109306105A (en) * | 2017-07-26 | 2019-02-05 | 刘红阳 | A kind of high polymer bio-based composite material and preparation method thereof |
| CN109852093A (en) * | 2017-11-30 | 2019-06-07 | 天津市川浩塑料制品有限公司 | A kind of regenerating and modifying plastic grain |
| CN109867974A (en) * | 2019-03-21 | 2019-06-11 | 天津商业大学 | A kind of preparation method of PE composite wood-plastic material and preparation method thereof, pallet |
| CN110367706A (en) * | 2019-07-11 | 2019-10-25 | 安徽欧通机电科技股份有限公司 | A kind of wood plastics composite wine frame and its processing method |
| CN111976037A (en) * | 2020-06-30 | 2020-11-24 | 湖北平安电工股份有限公司 | Method for producing mica special-shaped piece |
| CN114045043A (en) * | 2021-11-30 | 2022-02-15 | 浙江远景体育用品有限公司 | High-impact wood-plastic helmet composite material and preparation method thereof |
| CN114889303A (en) * | 2022-05-09 | 2022-08-12 | 东北林业大学 | Method for obtaining fully-degradable antibacterial wood-plastic composite material by compounding wood-plastic composite material and antibacterial agent |
| WO2022229933A1 (en) * | 2021-04-30 | 2022-11-03 | Nilo Global Limited | A plastic composite product |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106243542B (en) * | 2016-09-13 | 2018-11-13 | 北华大学 | A kind of production method of Radwood relief product |
| CN106243542A (en) * | 2016-09-13 | 2016-12-21 | 北华大学 | A kind of production method of Radwood relief goods |
| CN108724420A (en) * | 2016-09-22 | 2018-11-02 | 长泰惠龙新材料科技有限公司 | A kind of preparation method of environment protection pressed-fibre board |
| CN106752006A (en) * | 2016-12-22 | 2017-05-31 | 杨常成 | A kind of preparation method of wood-plastic composite panel |
| CN108795081A (en) * | 2017-05-01 | 2018-11-13 | 张家界恒林生态木有限公司 | A kind of environment-friendlywood-plastic wood-plastic composite material and preparation method thereof |
| CN109306105A (en) * | 2017-07-26 | 2019-02-05 | 刘红阳 | A kind of high polymer bio-based composite material and preparation method thereof |
| CN107674310A (en) * | 2017-10-31 | 2018-02-09 | 桂林市漓江机电制造有限公司 | A kind of fibre-reinforced imitated wood material |
| CN109852093A (en) * | 2017-11-30 | 2019-06-07 | 天津市川浩塑料制品有限公司 | A kind of regenerating and modifying plastic grain |
| CN108948774A (en) * | 2018-08-31 | 2018-12-07 | 邳州市金丰木质纤维粉有限公司 | A kind of preparation method of wood fiber powder |
| CN109867974A (en) * | 2019-03-21 | 2019-06-11 | 天津商业大学 | A kind of preparation method of PE composite wood-plastic material and preparation method thereof, pallet |
| CN110367706A (en) * | 2019-07-11 | 2019-10-25 | 安徽欧通机电科技股份有限公司 | A kind of wood plastics composite wine frame and its processing method |
| CN111976037A (en) * | 2020-06-30 | 2020-11-24 | 湖北平安电工股份有限公司 | Method for producing mica special-shaped piece |
| WO2022229933A1 (en) * | 2021-04-30 | 2022-11-03 | Nilo Global Limited | A plastic composite product |
| AU2022204035A1 (en) * | 2021-04-30 | 2022-11-17 | Nilo Limited | A plastic composite product |
| AU2022204035B2 (en) * | 2021-04-30 | 2023-07-20 | Nilo Limited | A plastic composite product |
| CN114045043A (en) * | 2021-11-30 | 2022-02-15 | 浙江远景体育用品有限公司 | High-impact wood-plastic helmet composite material and preparation method thereof |
| CN114045043B (en) * | 2021-11-30 | 2022-11-04 | 浙江远景体育用品股份有限公司 | High-impact wood-plastic helmet composite material and preparation method thereof |
| CN114889303A (en) * | 2022-05-09 | 2022-08-12 | 东北林业大学 | Method for obtaining fully-degradable antibacterial wood-plastic composite material by compounding wood-plastic composite material and antibacterial agent |
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