CN1052813A - Method with preparing products with wood polymers - Google Patents
Method with preparing products with wood polymers Download PDFInfo
- Publication number
- CN1052813A CN1052813A CN 89109853 CN89109853A CN1052813A CN 1052813 A CN1052813 A CN 1052813A CN 89109853 CN89109853 CN 89109853 CN 89109853 A CN89109853 A CN 89109853A CN 1052813 A CN1052813 A CN 1052813A
- Authority
- CN
- China
- Prior art keywords
- compound
- thermoplastic
- temperature
- wood
- plasticizer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
With the method for preparing products with wood polymers, it adopts the compound of being made up of less than 1.5% wood particle the thermoplastic of smashing to pieces, plasticizer, zinc stearate, moisture content, the weight ratio of each component to be followed successively by 35-60: 3.0-8.0: 0.8-2.5: 29.5-61.2.Compound pushes under the temperature of the fusion temperature 5-90 that is lower than thermoplastic ° K, and then, the compound after the compacting is in extrusion modling under the temperature of VISCOUS FLOW state at thermoplastic.
Description
The invention belongs to timber and polymer-binder is the manufacturing technology of the high packing material goods of matrix, more precisely, relates to the method with preparing products with wood polymers.
Method of the present invention can be used for building industry, machinery manufacturing industry and wood furniture industry.
The method (SU.A.670455) of the known strip goods of producing wood polymers be on screw extruder moisture content greater than 5% the wood particle and the thermoplastic compacting of smashing to pieces, vacuumize in compacting, the compound after making compacting under the 115-140 ℃ of temperature is shaped then.This method small pore, micro-flaw and projection occur owing to do not remove the steam of residual moisture fully when vacuumizing in goods, thereby the percent defective height, and the physical-mechanical property of goods is low.If in this method, reduce the water content of wood particle, then because of the bad processing and fabricating that is difficult to of the forming property of compound.
Another kind of known method (GB.A.1443194) with preparing products with wood polymers is under the temperature that is higher than the thermoplastic fusing point, to moisture content is that the wood particle of 4-12% and the compound of thermoplastic push, make the compound step-down then and vacuumize, under same temperature, push again, compound after making extruding then under thermoplastic is in the temperature of VISCOUS FLOW state is shaped, and is carrying out last extruding at last between the press bench that moves with the goods that are extruded.
This method can be produced the goods of the high packing material with good comprehensive physical and mechanical properties.But, implement this method and will overcome many difficulties.One of them is must make to use its operating mechanism (particularly at the depressor area of spiral propeller with except that the gas area) can bear very top load, rare and expensive extrusion equipment.
This method also must make the wood particle drying in screw extruder, so not only made the complex technical process change, but also reduced productivity ratio, screw extrusion is confidential to possess depressor area, vacuumize the district, the secondary extrusion district, and for eliminating projection in the goods, steam bubble, the pore extrusion process at last with micro-flaw.
Said method can not be made complex-shaped goods and hollow goods, pipe and so on for example, because when between press bench, pushing for the last time at last, and can be the cavity compacting.Technical process does not according to the method described above allow to cancel this last one extrusion process, otherwise, will inevitably be owing at drying process with vacuumize the steam of not eliminating remaining moisture content in the material structure in the operation fully and form defective in the tissue at goods.
Say on the whole.The productivity ratio of this method is low, and will adopt cost and complex equipment.
Task of the present invention is a kind of method with preparing products with wood polymers of working out, and this method is used low wood particle and the modifier of moisture content, and is the suitable temperature profile of extrusion process selection.Guarantee to produce goods with very high physical-mechanical property not using complex device and having under very large-duty condition.
Purpose of the present invention is exactly to create a kind of method with preparing products with wood polymers, and this method is not used complex apparatus, is guaranteeing that very large-duty while is arranged, and goods have very high physical-mechanical property.
This task is to solve like this: promptly propose a kind of method with preparing products with wood polymers, this method is by means of the compound that is mixed by wood particle and the thermoplastic smashed to pieces is pushed, compound through overcompaction is shaped, according to the present invention, compound is to push under the temperature of hanging down 5-90 ° of K than the fusion temperature of thermoplastic, the moisture content of above-mentioned wood particle is less than 1.5%, in compound, also added plasticizer and zinc stearate, the ratio of the constituent of compound following (percentage by weight):
Thermoplastic 35-60
Zinc stearate 0.8-2.5
Plasticizer 3.0-8.0
Water content is less than 1.5%
The wood particle surplus
Use the wood particle and the modifier of above-mentioned moisture content can guarantee that compound has good forming property simultaneously, eliminate the thermal cracking of compound, the goods that can obtain even tissue, do not have small pore and micro-flaw, the physical-mechanical property index are high.When adopting almost is the wood particle of bone dry, when carrying out extrusion process under the said temperature standard, just can cancel vacuumizing operation and extrusion process repeatedly, has just guaranteed the simplification of this method technology formation and equipment formation, and has improved productivity ratio.According to method provided by the present invention, promptly can make complex-shaped goods, also can make hollw article.
The present invention advises adopting and contains polyvinyl chloride, polyolefin as the thermoplastic that grinds, and adopts phthalic acid ester and/or mineral oil as plasticizer.
To under the dynamic loading condition, use as fruit product, in order to improve the impact flexibility of material, preferably adopt and contain the compound that weight is the mixture of being made up of nylon cord and epsilon-caprolactams of 10-20% in addition, the weight ratio of nylon cord and water-epsilon-caprolactam mixture is 10-20: 1.
In order to make product surface have special performances (ornamental, protective, reinforcement, water proofing property), be preferably in the thermoplastic that is coated with the last layer fusion after goods are shaped, perhaps thermoplastic is dissolved in the solution in the organic solvent.Method provided by the present invention is implemented as follows:
The thermoplastic smashed to pieces, plasticizer, zinc stearate and dry back moisture content are mixed less than 1.5% wood particle, and the weight ratio of various compositions is followed successively by 35-60: 3.0-8.0: 0.8-2.5: 29.5-61.2.Mixed compound pushes at screw extruder (compressional zone), extrusion temperature is lower than 5-90 ° of K of thermoplastic fusion temperature, then, tightly packed compound is under the high flow regime temperature at thermoplastic materials chews extrusion molding by shaping, makes it to become complex-shaped goods or hollw article.Made goods at room temperature cool off.Temperature profile when the essence of this method has been to adopt the extruding of above-mentioned the sort of compound, guarantee in realizing extrusion process, can in compound, not separate out and be enough to form projection, the volatile materials of micro-flaw or other defective has been created prerequisite thereby carry out operations such as drying (preliminary compression, the step-down of compound in the extruder, vacuumize) and the last extruding together of extrusion molding product for cancellation in extruder.
At last, owing in compound, added plasticizer, it some be distributed on the surface of timber, just can be by means of on this surface, forming one deck phase interbed, make the stress concentration degree on the interface of timber and thermoplastic reduce, thereby can guarantee the physical-mechanical property of raising goods.Hence one can see that, and plasticizer not only works to thermoplastic, for wood particle effect arranged also, and it reduces the rigidity of the two.The raising of the mobile property of compound can improve its forming property, and significantly reduces tonnage and reduce the heat dissipation that causes the compound thermal cracking.Simultaneously, also reduced the friction of compound and screw rod and cylinder barrel, this has just reduced the energy consumption in the product forming process.In the process of existing timber pressurization compound, moisture plays the timber plasticizer, and when moisture was less than 4%, goods just were difficult to be shaped.But, when moisture is vaporized, will make the goods cracking or projection and pore occur.In order to remove moisture, compound will be pressed or vacuumize in extrusion process through giving.In the method for the invention, these operations have been cancelled.Adding zinc stearate can not only impel the formation of phase interbed and reduce the friction of wood particle and screw extruder operating mechanism, and can also make the finished product product have antifriction performance, this antifriction performance makes it successfully be used for replacing the original similar object made from metal (as the guide rail of scraper conveyor) as friction parts, replace precious hard arbor plate (as the baffle plate of conveyer and the bearing element of multiple machine), the goods that can also replace polymer to make.
But indicated as test, the weight content of zinc stearate should not surpass 2.5%, and avoiding weakening adhesive attraction in the phase interbed, but weight has just no longer worked as being less than 0.8%.The weight content of plasticizer is between the 3.0-5.0%, is to select according to optimum physical-mechanical performance and the highest these two conditions of productivity ratio of this process of obtaining wood polymers.
The content of thermoplastic is also selected according to obtaining these two conditions of optimum performance and maximum productivity.Weight content as thermoplastic is increased to above 60.0%, because material skids in screw extruder, the productivity ratio of this process is sharply reduced.Be less than 35% as the thermoplastic weight that adds in the compound, the desired performance of then made goods just worsens.
Make polyvinyl chloride and low-density polyethylene (ρ=900-939 kilogram/rice that the used thermoplastic of Xylon polymerized goods can be emulsion state polyvinyl chloride, suspension
3).
For polyvinyl chloride, phthalate is used in the plasticizer suggestion, as phthalic acid two zinc ester or di-alkyl phthalates; For polyethylene, the plasticizer suggestion uses mineral oil or phthalic acid two zinc esters to add mineral oil; For polypropylene, the mixture of phthalic acid ester or it and mineral oil is used in plasticizer suggestion.
Wood particle can use 5/1 particle size fraction, can be 5 millimeters sieve by screen size, and is left particle in 1 millimeter the sieve in screen size.
The extrusion temperature standard of compound is selected according to two conditions, and promptly the physical-mechanical property of the cycling processability of material and wood polymers goods is best.Be higher than 5 ° of K below the thermoplastic fusion temperature as extrusion temperature, then the borderline polymeric layer with compound will melt on extruder cylinder barrel surface, and at this moment, polymer will stick on the screw rod and skid, and has so just reduced the productivity ratio of extruder.Be significantly less than the thermoplastic fusion temperature as extrusion temperature and surpassed 50 ° of K, then the rigidity along with wood substance grain and thermoplastic increases, needed operating pressure has also improved, and this all has harmful effect to the load of extruder operating mechanism and the energy consumption of this process.
Therefore, stable in order to make temperature profile, be that the cylinder barrel or its screw rod (particularly its output section) of extruder all must be taked cooling provision.And, must and extrude the temperature that the district remains in the viscous fluid state of thermoplastic at crush zone in order to eliminate the thermal cracking phenomenon.
In compound, add weight and be the mixture of forming by nylon cord and epsilon-caprolactams of 10-20%, and the weight ratio between them is 10-20: 1, then can improve the impact flexibility of material, this be since the reinforcement effect of cord and epsilon-caprolactams to the activation influence of cord.Epsilon-caprolactams is the monomer of polyamide fibre, can promote the enhancing of the adhesion of interior nylon cord of compound and thermoplastic.
In the extrusion process of Xylon polymerized compound, under the effect of pressure and temperature, for the polymerisation of the epsilon-caprolactams on topped wooden inserts and nylon fibre inserts surface has been created appropriate condition.
The product of epsilon-caprolactams polymerization (polyamide) contains active carboxyl material and amino material in its composition, these materials can react with cord material, also can react with timber and thermoplastic.Contain the intermediate course of active atomic group after this polymerization, can impel the chemical reaction on thermoplastic and inserts surface, make wood polymers have firmer single tissue, and improved its intensity index.The characteristics that are in the polymerizate (polyamide) of the epsilon-caprolactams on inserts surface are intensity height, good springiness, thereby can guarantee that wood polymers has very high impact flexibility.
With the fused mass of thermoplastic or the product surface after its solution-treated heating in organic solvent, can improve the performance of goods owing to the reinforcement on the physics and chemistry, and can on the surface of the section bar that extruding is come out, enclose layer protective layer or decorative layer.
Therefore, above-mentioned various measures and operation are integrated, just can be with fairly simple and reliable device according to having technology possibility and the higher production routine of productivity ratio widely, produces Xylon polymerized goods.
The advantage of the inventive method can be summed up as:
-adopt fairly simple and reliable extrusion equipment (not depressor area, vacuumize district, compressional zone once more, also add movably or the fixed pressure machine);
-because cancelled the drying process of wood particle in extruder, so have higher productivity ratio;
-because of the crackle, pore, the projection that do not have to cause, so the physical-mechanical property of goods (when other condition is identical) is higher owing to residual moisture;
-since the load on the spiral propeller little (because spiral propeller is than former short 1.5-2 doubly, its working surface is correspondingly less), the good reliability of equipment.In addition, the section of spiral propeller does not slacken, and at depressor area with vacuumize the district, owing to will make step, unavoidably will slacken section;
-can make hollow and complex-shaped goods.
The physical-mechanical property index of made goods is measured it according to known method.
Introduce the specific embodiment of the inventive method below.
Embodiment 1
With polyvinyl chloride, dioctyl phthalate and the zinc stearate smashed to pieces and moisture content is that 1.5% wood particle mixes, and the weight ratio between them was followed successively by 35.0: 3.0: 0.8: 61.2.Mixed compound is pushed under 383 ° of K temperature in screw extruder, then, the compound after the compacting is chewed the section bar that is extruded into 10 * 15 millimeters by moulding under the temperature of 433 ° of K.Section bar at room temperature cools off.Profile material physical-mechanical property index is listed in the subordinate list.
Embodiment 2
With polyvinyl chloride, dibutyl phthalate and the zinc stearate smashed to pieces and water content is that 0.5% wood particle mixes, and their weight ratio was followed successively by 60.0: 8.0: 2.5: 29.5.Mixed compound is pushed under the temperature of 383 ° of K in screw extruder, and then, the compound after the compacting is chewed by moulding and to be squeezed into skirting board under the temperature of 433 ° of K.Skirting board at room temperature cools off, and the physical-mechanical property index of its material is listed in the subordinate list.
Embodiment 3
With polyethylene, dioctyl phthalate and the zinc stearate smashed to pieces and water content is that 1.0% wood particle mixes, and the weight ratio between them was followed successively by 50.0: 3.5: 1.0: 45.5.Mixed compound pushes under the temperature of 353 ° of K in screw extruder, then, the compound after the compacting is chewed by shaping under the temperature of 433 ° of K to be extruded into diameter be 60 millimeters pipe.Pipe at room temperature cools off.The physical-mechanical property index of tubing is listed in the subordinate list.
Embodiment 4.
With the polyethylene of smashing to pieces, mineral oil, zinc stearate and water content are that 1.0% wood particle mixes, and the weight ratio between them is 50.0: 3.5: 1.0: 45.5.Mixed compound pushes under the temperature of 353 ° of K in screw extruder, and then, tightly packed compound is chewed the section bar that is extruded into 10 * 40 millimeters by moulding under the temperature of 433 ° of K.Section bar at room temperature cools off.The physical-mechanical property index of profile material is listed in the subordinate list.
Embodiment 5
With the polypropylene smashed to pieces, dioctyl phthalate, broken nylon cord, caprolactam and zinc stearate and water content is that 1.0% wood particle mixes, and the weight ratio between them was followed successively by 50.0: 4.0: 9.1: 0.9: 1.0: 35.0.Mixed compound pushes in screw extruder under the temperature of 453 ° of K, and chews the section bar that is extruded into 10 * 40 millimeters by moulding.Section bar at room temperature cools off.The physical-mechanical property index of profile material is listed in the subordinate list.
Embodiment 6
With the polyvinyl chloride smashed to pieces, dioctyl phthalate, broken nylon cord, caprolactam and zinc stearate and water content are that 1.0% wood particle mixes, and the weight ratio between them was followed successively by 50.0: 5.0: 19.0: 1.0: 1.5: 23.5.Mixed compound pushes under the temperature of 383 ° of K in screw extruder, and then, the compound after the compacting is chewed the section bar that is extruded into 10 * 40 millimeters by moulding under the temperature of 433 ° of K.Section bar at room temperature cools off.The physical-mechanical property index of profile material is listed in the subordinate list.
Embodiment 7
With the polyvinyl chloride smashed to pieces, dibutyl phthalate, zinc stearate and water content is that 1.0% wood particle mixes, and the weight ratio between them was followed successively by 50.0: 5.0: 1.5: 43.5.Mixed compound pushes under the temperature of 393 ° of K in screw extruder, and then, the compound after the compacting chews by moulding under the temperature of 433 ° of K that to be extruded into diameter be 40 millimeters pipe.Be coated with to be dissolved in the novolaks in the alcohol on the section bar surface of the heat of just having extruded.Section bar at room temperature cools off.The physical-mechanical property index of profile material is listed in the subordinate list.
Embodiment 8.
Making diameter according to embodiment 7 described methods is 50 millimeters tubulose section bar, and its difference is to be coated with the polyethylene fused solution on the section bar surface of the heat just extruded.Tubing at room temperature cools off.The physical-mechanical property index of pipe material is listed in the subordinate list.
Embodiment 9.
Make section bar according to embodiment 7 described methods, its difference is that compound is to push under the temperature of 428 ° of K, and the temperature of moulding extruding is 433 ° of K.The physical-mechanical property index of profile material is listed in the subordinate list.
Claims (5)
1, a kind of method with preparing products with wood polymers, it is by means of to being pushed by wood particle and the thermoplastic composite compound of having smashed to pieces, then under thermoplastic is in the temperature of VISCOUS FLOW state, the compound after the compacting is shaped, the invention is characterized in that compound is to push under the temperature of hanging down 5-90 ° of K than the fusion temperature of thermoplastic, the moisture content of above-mentioned wood particle is less than 1.5%, and in compound, contain plasticizer and zinc stearate in addition, the weight ratio of various compositions following (%):
Thermoplastic 35-60
Zinc stearate 0.8-2.5
Plasticizer 3.0-8.0
Moisture content is less than 1.5%
The wood particle surplus.
2, the method for claim 1 is characterized in that using in the compound polyvinyl chloride as thermoplastic, uses phthalate as plasticizer.
3, the method for claim 1 is characterized in that in the compound with polyolefin as thermoplastic, and mineral oil and/or phthalate are as plasticizer.
4, the method for claim 1 is characterized in that also containing in the compound weight and is the mixture of being made up of nylon cord of smashing to pieces and epsilon-caprolactams of 10-20%, and the weight ratio between the two is 10-20: 1.
5, the method for claim 1 is characterized in that being coated with on the surface of the heat of product after moulding of wood polymers with the melt liquid of thermoplastic or thermoplastic and is dissolved in solution in the organic solvent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89109853 CN1052813A (en) | 1989-12-30 | 1989-12-30 | Method with preparing products with wood polymers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89109853 CN1052813A (en) | 1989-12-30 | 1989-12-30 | Method with preparing products with wood polymers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1052813A true CN1052813A (en) | 1991-07-10 |
Family
ID=4858166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89109853 Pending CN1052813A (en) | 1989-12-30 | 1989-12-30 | Method with preparing products with wood polymers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1052813A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060993C (en) * | 1993-03-05 | 2001-01-24 | 三泽家庭株式会社 | Method of manufacturing wood-like product and the product |
| CN107848140A (en) * | 2015-07-23 | 2018-03-27 | 3Rt控股私人有限公司 | Artificial wood products and its preparation method |
-
1989
- 1989-12-30 CN CN 89109853 patent/CN1052813A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060993C (en) * | 1993-03-05 | 2001-01-24 | 三泽家庭株式会社 | Method of manufacturing wood-like product and the product |
| CN107848140A (en) * | 2015-07-23 | 2018-03-27 | 3Rt控股私人有限公司 | Artificial wood products and its preparation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1192062C (en) | Molding material and process for preparing same | |
| US3054761A (en) | Extrudable composition comprising tetrafluoroethylene, methyl methacrylate, and a volatile organic lubricant | |
| CN1062803C (en) | Extruded synthetic wood composition and method for making same | |
| EP2800781B1 (en) | Long fiber thermoplastic formed with recycled and renewable content and process for its production | |
| Kumari et al. | Fundamental studies on wood/cellulose-plastic composites: effects of composition and cellulose dimension on the properties of cellulose/PP composite | |
| CN1158628A (en) | Biodegradable material comprising regenerative raw material and method of producing the same | |
| RU2081135C1 (en) | Environmentally appropriate wood-filled plastic and method of preparation thereof | |
| CN1239488A (en) | Material containing expandable microspheres and process for prodn. thereof | |
| FR3060577A1 (en) | LIQUID COMPOSITION COMPRISING TWO INITIATORS, ITS POLYMERIZATION PROCESS, USE AND MATERIAL OR COMPOSITION OBTAINED AFTER POLYMERIZATION OF THE COMPOSITION | |
| CN106967250B (en) | Composition of long fiber reinforced thermoplastic molding material and use method thereof | |
| CN1052813A (en) | Method with preparing products with wood polymers | |
| EP3251810A1 (en) | Method for manufacturing a rubber pellet, a rubber pellet as well as a product manufactured from such rubber pellet | |
| CN1082972C (en) | Expandable rubber-modified styrene resin beads, expanded beads thereof, and expanded molded articles obtained therefrom | |
| Jiang et al. | An online extrusion-compression molding method to produce wood plastic composite packaging boxes | |
| CN111587265B (en) | Liquid composition for use in applications of SMC molded thermoplastic composites | |
| CN1082072A (en) | Resin combination | |
| CN1445285A (en) | Modified composite material of woods and plastics as well as its usage and manufacturing method | |
| CN1604848A (en) | Laminate of ethylene-methyl acrylate and polyester | |
| CN1670080A (en) | Whole-degradable polymethyl ethylene carbonate foamed materials and process for preparing same | |
| CN1416446A (en) | Process for producing high melt flow polymers | |
| US20180104654A1 (en) | Production system for composite porous solid articles | |
| US20210079250A1 (en) | Superficially coated vegetable fibers, process for their production, and use thereof in the production of manufactured articles | |
| CN1399588A (en) | Silane crosslinking process | |
| KR20200091409A (en) | Wood plastic composite composition comprising wax composition, method for manufacturing wood plastic composite therefrom, and use of wax composition as lubricant for production of wood plastic composite | |
| CN1297958A (en) | Method of producing composite material and product by using flyash and waste polymer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |