CN101397375A - PVC low foaming wood-plastic decorating material and production method thereof - Google Patents
PVC low foaming wood-plastic decorating material and production method thereof Download PDFInfo
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- CN101397375A CN101397375A CNA2007100465028A CN200710046502A CN101397375A CN 101397375 A CN101397375 A CN 101397375A CN A2007100465028 A CNA2007100465028 A CN A2007100465028A CN 200710046502 A CN200710046502 A CN 200710046502A CN 101397375 A CN101397375 A CN 101397375A
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Abstract
The invention relates to a wood plastic material, in particular to a low-foaming PVC wood plastic decorative material. The low-foaming PVC wood plastic decorative material is characterized in that the formula thereof comprises the following raw materials calculated by weight percent: 40 to 80 percent of PVC resin, 20 to 50 percent of wood powder, 1 to 5 percent of foaming agent, 1 to 3 percent of titanate coupling agent, and 1 to 3 percent of industrial white oil, wherein, the volume ratio of the titanate coupling agent and the industrial white oil is 1:1. Due to the activation treatment of the wood powder, the invention causes the surface compatibility of the wood powder and the resin to be enhanced greatly, so the physical and chemical properties of the materials are improved to a large extent. Compared with the domestic prior micro-foaming PVC wood plastic composite material, the low-foaming PVC wood plastic decorative material has the advantages of light weight, excellent physical and chemical properties, and non-toxic (lead-free, non-formaldehyde) property, and is an excellent substitute for a solid wood decorative material.
Description
Technical field
The present invention relates to a kind of Wood-plastic material, particularly a kind of PVC low foaming wood-plastic decorating material.The invention still further relates to the manufacture method of this PVC low foaming wood-plastic decorating material.
Background technology
Polyvinyl chloride (PVC) base wood-plastic composite material is that to utilize wood powder, bamboo powder, cavings, shell powder or agricultural crop straw powder (following general designation wood powder) and polyvinyl chloride resin or waste PVC plastics be main raw material, through mixing and forming process and a kind of advanced composite material that makes.It makes principle is that polyvinyl chloride resin and wood powder through pulverizing, stablizer, lubricant, whipping agent, foaming control agent, tinting material etc. are made regular particle through single screw pelletizer is mixing under High Temperature High Pressure, is the foaming product that has use value through single screw rod or conical double screw extruder by the PVC foaming mould extrusion moulding of specialty again.
As everyone knows, wood powder easily absorbs water, a large amount of oh groups is contained on the surface, exist bigger interfacial energy poor between the polymer surfaces of hydrophilic wood powder and hydrophobic nature, thereby make wood powder in polymkeric substance, can not disperse equably and reunite, and these coacervates easily cause stress concentration under external force, make the physical and mechanical property of goods descend significantly, therefore must carry out activation treatment to the wood powder surface in the course of processing.So people come wood powder is carried out activation treatment with coupling agent.
As Granted publication day be on April 19th, 2006, Granted publication has just used coupling agent number for the Chinese invention patent of CN1252165C discloses a kind of Wood-plastic foam material and processing and forming technology thereof.A kind of Wood-plastic foam material is characterized in that: described Wood-plastic foam material is meant by following raw materials according and mixes by weight that concrete ratio and raw material are as follows:
20～65 parts of polyethylene
10～70 parts of wood powders
4～8 parts of fillers
2.5～4 parts of compatilizers
0.5～1 part of coupling agent
0.5～1 part of lubricant
0.5～1.5 part of whipping agent
0.5 part of blowing promotor
Described compatilizer is a maleic anhydride grafted polyethylene;
Described coupling agent is silane coupling agent, titante coupling agent or aluminic acid ester, aluminium titante coupling agent;
Described whipping agent is a Cellmic C 121, and described blowing promotor is a zinc oxide.
The processing step of its preparation is as follows:
A) raw materials weighing
B) wood powder is added in the high speed mixing roll, with the wood powder oven dry, adding coupling agent, lubricant make the wood powder activation under 110～120 ℃ of temperature;
C) after adding compatilizer, polyethylene and whipping agent, blowing promotor mixed, blowing went into to be cooled to 40 ℃ in the cold mixer when 120 ℃ of material temperature, but becomes foam mixture;
D) this compound is dropped in the forcing machine hopper, extrude,, or drop into foaming in injector or the hot-die molding machine through foaming mould foaming cooling and shaping through forcing machine.
But in the prior art, the coupling agent of interpolation can't be dispersed in the wood powder preferably, makes the effect of coupling agent not have the good of expection.
Summary of the invention
The first aspect of technical problem to be solved by this invention is, a kind of PVC low foaming wood-plastic decorating material is proposed, the component of described PVC low foaming wood-plastic decorating material, make coupling agent be uniformly dispersed, and then make the activation levels of wood powder improve, finally make PVC low foaming wood-plastic decorating material physical and chemical performance be improved to a great extent.
The PVC low foaming wood-plastic decorating material, its prescription comprises titanate coupling agent, it is characterized in that: its prescription also comprises with the titanate coupling agent volume ratio being the industrial white oil that is used to dilute described titanate coupling agent of 1:0.5～1.5.
When if volume ratio is higher than 1:0.5, industrial white oil ratio in the system is too high, and the ratio of titanate coupling agent in whole formula system is fixed, because industrial white oil is a kind of external lubricant, the too high meeting of its ratio causes the frictional force between material and screw rod, the machine barrel to descend, cause material plasticizing bad, influence the physical and chemical performance of material.And volume ratio is when being lower than 1:1.5, industrial white oil in the system is lower excessively than regular meeting, and the ratio of titanate coupling agent in whole formula system is fixed, because industrial white oil is a kind of external lubricant, the words that its ratio is low excessively, cause the mobile bad of material, thereby goods is surperficial jagged or rough.
The present invention dilutes titanate coupling agent, titanate coupling agent is dispersed in the wood powder system, thereby wood powder is activated to the full extent, make wood powder and polyvinyl chloride resin surface compatability strengthen dramatically, make that like this performance of PVC low foaming wood-plastic decorating material is more good.
Industrial white oil is preferably the 10# industrial white oil.10# industrial white oil viscosity is moderate, is beneficial to titanate coupling agent and disperses in system; And 15#, 18#, 24# industrial white oil viscosity are higher, are unfavorable for the dispersion of titanate coupling agent in system; So the 10# industrial white oil is fit to the dilution titanate coupling agent.
The invention allows for a kind of concrete prescription of PVC low foaming wood-plastic decorating material.
The PVC low foaming wood-plastic decorating material, its prescription comprises the raw material of following mass percent meter:
Polyvinyl chloride resin 40～60%
Wood powder 20～40%
Treated carbonates 5～20%
Organotin stabilizer 1～5%
One package stabilizer 1～5%
Whipping agent 1～5%
Foaming control agent 1～5%
Lubricant 1～4%
Titanate coupling agent 1～3%
10# industrial white oil 1～3%
Wherein the volume ratio of titanate coupling agent and 10# industrial white oil is 1:1.
Further, its prescription also comprises anti UV agent 0.1～1%.
Further, its prescription also comprises tinting material 1～3%.
Treated carbonates is that Calcii Carbonas or water-ground limestone are made with surface treatment such as activator, coupling agent, and specific surface area is bigger about 20 times than ordinary calcium carbonate, high about 30 times of solubleness.Be widely used in plastics, rubber industry can improve the release property of goods, increases surface smoothness and flexible resistance, improves processing characteristics, flowing property, physical and mechanical properties and the raising mechanical strength of goods, increases loading level the cost of goods is significantly descended.
Organotin stabilizer is the derivative of various carboxylic acid tin and tin mercaptides, and main products is the organic compound of dibutyl tin and dioctyl tin, and wherein the dioctyl tin compound is used as non-toxic stabilizer by more country.Organotin is mainly used to stablize the hard PVC goods, and particularly those need the product of the good transparency and thermostability, also can stablize flexible article certainly.
Lubricant perhaps is called the plastics lubricant, is in the process of making plastics film, adds the additive that increases sliding property, reduces binding property and surperficial flake.Being generally used for poly lubricant is the long-chain fat acid amides, and as amine hydroxybenzene, erucicamide, stearic amide etc., it also is that a class performance can the excellent lubrication agent that oxidic polyethylene and esterification thereof, calcium (salt) are changed product.The plastics lubricant also has following effect: can regulate gel speed; Control resin melt temperature; Improve demoulding and processibility; Improve flowability, increase Combination, reduce power consumption; Improve dimensional stability; Improve surface propertys such as outward appearance, gloss, feel; Improve the dispersiveness of additive etc.
The manufacture method that is to propose above-mentioned PVC low foaming wood-plastic decorating material on the other hand of purpose of the present invention.
A kind of method of making above-mentioned PVC low foaming wood-plastic decorating material, the step that comprises have activation treatment, raw material mixing, granulation, the extrusion moulding of wood powder; It is characterized in that wood powder activation treatment step is: wood powder is mixed to 110 ℃～120 ℃ moisture of removing wherein, add then with the industrial white oil 1:1 titanate coupling agent high-speed mixing of diluting 5 minutes by volume under high-speed mixer.
Before the wood powder activation treatment,, make its moisture content be controlled at below 2% with the wood powder drying.
The titanate coupling agent molecular structure is very unstable, and easy hydrolysis and self-polymerization are dimer or tripolymer under aqueous environments.Wood powder itself also has about 2% moisture content after drying, thereby can make titanate coupling agent lose the activatory effect.Show that through great number tested data wood powder stirs in the high mixer high speed, its water content is about 1.0% when the temperature of system is raised to 110 ℃, and the comprehensive process cost relatively is fit to titanic acid ester it be carried out activation treatment this moment.
Wood powder activation treatment postcooling to 50 ℃ is packed.Be cooled to 50 ℃, when preventing the excessive temperature packing, lump during the wood powder naturally cooling.
Carrying out the granulation preplasticizing before granulation handles.
The mixing process of raw material is as follows: polyvinyl chloride resin is added in the high mixer, add organotin stabilizer and one package stabilizer again, add treated carbonates, activatory wood powder and whipping agent, foaming control agent, lubricant, anti UV agent, tinting material after being mixed to 90 ℃, be mixed to cold the mixing to 50 ℃ of 120 ℃ of blankings and get final product.Selecting 120 ℃ of heat to mix and finish, is because the moisture content of this moment is removed (about 1.0%) largely; And cold mixing to 50 ℃, powder can not driven bridge and cause occurring in the granulation process fracture phenomenon in the granulation process in the tablets press hopper like this.
Prilling temperature control is as follows: machine barrel one district, 100～110 ℃; Machine barrel two districts, 110～120 ℃; Machine barrel three districts, 130～140 ℃; Machine barrel four districts, 150～160 ℃; Die head temperature, 150～160 ℃.
The processing condition control of extrusion moulding is as follows:
Engine speed, 600～700r/min; Pulling speed, 110～120r/min; Machine barrel one district, 120～130 ℃; Machine barrel two districts, 150～160 ℃; Machine barrel three districts, 160～170 ℃; Machine barrel four districts, 190～200 ℃; Die temperature, 140～160 ℃; Cooling temperature of circulating water, 10～15 ℃.
PVC low foaming wood-plastic decorating material of the present invention is compared with present domestic existing P VC fine foaming wood plastic composite materials and is had the following advantages, and light weight, physicochemical property good, nontoxic (unleaded, formaldehydeless) are the good substitutes of solid wood decorative material.
The superiority of the performance of the PVC low foaming wood-plastic decorating material that makes by the method for the concrete prescription of above-mentioned PVC low foaming wood-plastic decorating material and above-mentioned manufacturing PVC low foaming wood-plastic decorating material with contrast experiment's data declaration below.
| Project | The present invention | Existing PVC low foaming wood moulding material |
| Vicat softening point ℃ | ≥70 | ≥60 |
| Density g/cm 3 | ≥0.6 | ≥0.8 |
| 24h water-intake rate % (exterior product) | ≤2.0 | ≤3.0 |
| Shore hardness D | ≥60 | ≥60 |
| Flame retardant resistance (plastics combustion test method normal beam technique) | The FV-0 level | The FV-0 level |
| Heating back size changing rate % | ≤3.0 | ≤4.0 |
| MOR MPa | ≥20 | ≥15 |
| Bending elastic modulus MPa | ≥1600 | ≥1200 |
| Tensile strength MPa | ≥10 | ≥10 |
| Surface abrasion resistance g/100r | ≤0.2 | ≤0.3 |
| Hold screw power N | Plate face 〉=1000; Edges of boards 〉=800 | Plate face 〉=1000; Edges of boards 〉=800 |
| Atmospheric exposure test (exterior product: 500h) | 〉=3 grades | 〉=3 grades |
Embodiment
For technique means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with embodiment, further set forth the present invention.
Embodiment 1
(fineness: drying 80～100 orders) makes its moisture content be controlled at below 2% with wood powder earlier; Getting wood powder 100kg after the oven dry adds the mixer high speed and is stirred to 110 ℃ and (relies on the frictional heats between material and bucket wall, agitating vane, master's motor speed is 1470r/min when running up), the back adds titanate coupling agent high-speed mixing that 4kg dilute with the 10# industrial white oil and cooled off in 5 minutes again and mixedly pack to 50 ℃.
The polyvinyl chloride resin (800 type) of getting 75kg adds in the high mixer, the one package stabilizer that adds 1～3kg organotin stabilizer and 3～10kg again adds treated carbonates 5～10kg, activation wood powder 30～50kg and whipping agent, foaming control agent, lubricant, anti UV agent, tinting material after being mixed to 90 ℃ and is mixed to cold the mixing to 50 ℃ of 120 ℃ of blankings and gets final product.
Because the wood powder major ingredient is a Mierocrystalline cellulose, it is the highest to heat the content that does not melt and fill in system, so from the product molding effect, reply blended system is carried out the granulation preplasticizing and is handled, owing to the whipping agent of the azo series that contains in the system is met pyrolytic decomposition and polyvinyl chloride resin owing to reasons such as himself structural instabilities, under High Temperature High Pressure, very easily be decomposed into hydrogen chloride gas, and then influence the foaming effect and the physical and mechanical property of goods.Therefore must should select professional PVC foaming granulation screw by the strict screw rod of controlling its granulation process temperature and granulating equipment in the process of granulation, its screw slenderness ratio is 15～20:1.
The temperature control of granulation is as follows:
Machine barrel one district, 100～110 ℃; Machine barrel two districts, 110～120 ℃; Machine barrel three districts, 130～140 ℃; Machine barrel four districts, 150～160 ℃; Die head temperature, 150～160 ℃.
The Wood-plastic foam particle that to make again is with the extrusion moulding of professional Wood-plastic foam extrusion equipment, and its technology controlling and process is as follows:
Engine speed, 600～700r/min; Pulling speed, 110～120r/min; Machine barrel one district, 120～130 ℃; Machine barrel two districts, 150～160 ℃; Machine barrel three districts, 160～170 ℃; Machine barrel four districts, 190～200 ℃; Die temperature, 140～160 ℃; Cooling temperature of circulating water, 10～15 ℃.
More than show and described ultimate principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the specification sheets just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (12)
1, PVC low foaming wood-plastic decorating material, its prescription comprises titanate coupling agent, it is characterized in that: its prescription also comprises with the titanate coupling agent volume ratio being the industrial white oil that is used to dilute described titanate coupling agent of 1:0.5～1.5.
2, PVC low foaming wood-plastic decorating material according to claim 1 is characterized in that: described industrial white oil is the 10# industrial white oil.
3, PVC low foaming wood-plastic decorating material according to claim 1 is characterized in that, its prescription comprises the raw material of following mass percent meter:
Polyvinyl chloride resin 40～60%
Wood powder 20～40%
Treated carbonates 5～20%
Organotin stabilizer 1～5%
One package stabilizer 1～5%
Whipping agent 1～5%
Foaming control agent 1～5%
Lubricant 1～4%
Titanate coupling agent 1～3%
10# industrial white oil 1～3%
Wherein the volume ratio of titanate coupling agent and 10# industrial white oil is 1:1.
4, PVC low foaming wood-plastic decorating material according to claim 3 is characterized in that: its prescription also comprises anti UV agent 0.1～1%.
5, PVC low foaming wood-plastic decorating material according to claim 3 is characterized in that: its prescription also comprises tinting material 1～3%.
6, a kind of method of making each described PVC low foaming wood-plastic decorating material of claim 1～5, the step that comprises have activation treatment, raw material mixing, granulation, the extrusion moulding of wood powder; It is characterized in that wood powder activation treatment step is: wood powder is mixed to 110 ℃～120 ℃ moisture of removing wherein, add then with the industrial white oil 1:1 titanate coupling agent high-speed mixing of diluting 5 minutes by volume under high-speed mixer.
7, the method for PVC low foaming wood-plastic decorating material according to claim 6 is characterized in that: before the wood powder activation treatment, with the wood powder drying, make its moisture content be controlled at below 2%.
8, the method for PVC low foaming wood-plastic decorating material according to claim 6 is characterized in that: wood powder activation treatment postcooling to 50 ℃ is packed.
9, the method for PVC low foaming wood-plastic decorating material according to claim 6 is characterized in that: carry out the granulation preplasticizing and handle before granulation.
10, the method for PVC low foaming wood-plastic decorating material according to claim 6, it is characterized in that, the mixing process of raw material is as follows: polyvinyl chloride resin is added in the high mixer, add organotin stabilizer and one package stabilizer again, add treated carbonates, activatory wood powder and whipping agent, foaming control agent, lubricant, anti UV agent, tinting material after being mixed to 90 ℃, be mixed to cold the mixing to 50 ℃ of 120 ℃ of blankings and get final product.
11, the method for PVC low foaming wood-plastic decorating material according to claim 6 is characterized in that, prilling temperature control is as follows: machine barrel one district, 100～110 ℃; Machine barrel two districts, 110～120 ℃; Machine barrel three districts, 130～140 ℃; Machine barrel four districts, 150～160 ℃; Die head temperature, 150～160 ℃.
According to the manufacture method of the described PVC low foaming wood-plastic decorating material of claim 6, it is characterized in that 12, the processing condition control of extrusion moulding is as follows:
Engine speed, 600～700r/min; Pulling speed, 110～120r/min; Machine barrel one district, 120～130 ℃; Machine barrel two districts, 150～160 ℃; Machine barrel three districts, 160～170 ℃; Machine barrel four districts, 190～200 ℃; Die temperature, 140～160 ℃; Cooling temperature of circulating water, 10～15 ℃.
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| CN2007100465028A CN101397375B (en) | 2007-09-27 | 2007-09-27 | PVC low foaming wood-plastic decorating material and production method thereof |
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| CN2007100465028A CN101397375B (en) | 2007-09-27 | 2007-09-27 | PVC low foaming wood-plastic decorating material and production method thereof |
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| CN101397375A true CN101397375A (en) | 2009-04-01 |
| CN101397375B CN101397375B (en) | 2011-11-30 |
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| CN110892123A (en) * | 2018-05-16 | 2020-03-17 | 增城市碧桂园物业发展有限公司 | Construction method for installing skirting line system on wallboard |
| CN113652037A (en) * | 2021-07-20 | 2021-11-16 | 联塑科技发展(武汉)有限公司 | High-strength anti-aging polyvinyl chloride composite material and preparation method and application thereof |
| CN116480664A (en) * | 2023-04-26 | 2023-07-25 | 安徽优丽普科技有限公司 | Macromolecular PVC foaming single-interface groove plate and structural design thereof |
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| CN101397375B (en) | 2011-11-30 |
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