KR101416517B1 - High Strength and Flame Retardant Wood Plastic Composites with Zeolite - Google Patents
High Strength and Flame Retardant Wood Plastic Composites with Zeolite Download PDFInfo
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Abstract
The present invention relates to a high strength flame retardant synthetic wood containing zeolite and a method for producing the same.
A method for producing a high strength flame retardant synthetic wood containing zeolite according to the present invention comprises: a pulverizing step of pulverizing a coniferwood to a size of 60 to 100 mesh to produce wood powder; The wood powder is put into a dryer and heated at a temperature of 100 to 125 ° C. for 3 to 4 hours to dry the wood powder so that the water content in the wood powder is 5 wt% or less; 100 parts by weight of the dried wood powder, 8 to 13 parts by weight of polyethylene, 29 to 35 parts by weight of polypropylene, 3.5 to 4.5 parts by weight of a colorant, 3.8 to 4.5 parts by weight of a lubricant, and 5.3 to 5.8 parts by weight of a binder , Calcium carbonate or talc and one or more of mica, talc, bentol and antimony trioxide in a weight ratio of 1: 1, 1.4 to 1.8 parts by weight of an antioxidant, zinc, copper, 0.7 to 1.0 part by weight of an antimicrobial agent composed of zeolite substituted with one metal ion selected from the group consisting of mercury, tin, lead, bismuth, cadmium, chromium and thallium ion is put into the compounding machine, Mixing the mixture for 45 minutes to prepare a compound in the form of a chip having a size of 3 to 6 mm; Extruding the compound into an extruder hopper and extruding the mixture at a cylinder temperature of 180 to 250 DEG C and a die temperature of 150 to 190 DEG C for 5 to 15 minutes to produce a synthetic wood; And a cooling step of cooling the synthetic wood extruded in the extruder.
According to the present invention, it is possible to minimize the change in length in accordance with the change in external temperature, to prevent cracking due to impact, to improve long-term deformation by impact strength, bending strength, thermal deformation temperature and load, Which is capable of preventing the deterioration of the physical properties of the resin and enhancing the flame retardancy and exhibiting the antibacterial activity over a long period of time, by constituting the nanoclays such as mica, talc and bentol as well as absorbing moisture of the wood powder, Synthetic wood is provided.
Description
TECHNICAL FIELD The present invention relates to a synthetic wood used as a structural material for a bench or a stairway such as a park or a mountain trail, and a method for manufacturing the synthetic wood, and more particularly to a synthetic wood having a low flame retardancy, Strength flame-retardant synthetic wood containing zeolite.
Natural wood, which is commonly known, is widely used as an environmentally friendly construction and exterior material for buildings such as flooring of buildings, interior doors, and window frames, and is excellent in workability. On the other hand, its strength is extremely weak. It is easy to deform, it is not semipermanent, and it has many disadvantages such that the price of natural wood itself is high, while damaging the forest.
Therefore, a synthetic wood which is formed by mixing synthetic resin and wood instead of natural wood as described above is widely developed.
In the conventional synthetic wood related to such a technique, it is known to produce artificial wood by mixing materials such as wood or sawdust with plastic.
As a specific example, "a process for producing synthetic wood fiber of wood flour" (Korean Patent Registration No. 10-378777, Patent Document 1) discloses a method of pulverizing bleached sawdust with fine powder and then blending the PVC powder and the sawdust powder coated with a cross- 10 to 60: 90 to 40 in volume ratio, followed by foaming and extrusion molding to produce synthetic wood.
However, in the artificial wood using such a conventional plastic, the natural texture of the natural wood itself can not be obtained at all by merely mixing the sawdust or the chaff with the PVC powder using the cross-linking agent, The PVC resin causes pollution of the environment due to the harmful substances contained therein and causes decomposition of the synthetic polymer due to the influence of ultraviolet light when exposed to the outside, There is a problem in stability. Therefore, the synthetic wood is frequently replaced, and the replacement cycle is further accelerated when the environment is poor. Thus, the cost is increased.
On the other hand, in recent years, "Molded wood and its manufacturing method" (Korean Patent Registration No. 10-0864484, Patent Document 2), which is excellent in the strength and durability of synthetic wood by mixing a flame retardant into organic fiber materials such as Kim, .
Patent Document 2 discloses that 1-5 wt% of a non-halogen flame retardant is added to 55-65 wt% of organic fibers obtained by pulverizing seaweeds such as Kim, marine, parasitic, peanut bark, bamboo, corn, palm fruit, etc. with 35-80 mesh, And the mixture is mixed with 1-3% by weight of natural cellulose. Then, 25-35% by weight of a thermoplastic resin which is a C1-C10 polyalkylene is added to the mixture, , 1-5 wt% of a surfactant, 1-5 wt% of maleic anhydride, 2-5 wt% of a pigment, and 2-7 wt% of a non-halogen flame retardant are mixed to produce a mixed composition, To produce a synthetic wood.
However, the above-mentioned synthetic wood is formed by mixing at least 50% by weight of organic fiber composed of seaweeds other than natural wood, peanut shell, corn, palm fruit and the like with thermoplastic resin, In particular, when the synthetic wood as described above is easily exposed to the outside, such as an outer wall material of a building, a roof, a house fence, a terrace, a walkway flooring, etc., the synthetic wood may cause decomposition of the synthetic polymer due to ultraviolet rays So that the shape of the synthetic wood is changed not only due to the thermoplastic resin but also because it is extremely vulnerable to heat due to the nature of the thermoplastic resin. Therefore, the synthetic wood is frequently replaced, The replacement cycle becomes faster, and the cost is greatly increased. It was.
The high-strength flame-retardant synthetic wood containing zeolite of the present invention is intended to solve the above-mentioned problems in the prior art. It minimizes the use ratio of the polyethylene resin in the material of the thermoplastic resin and uses polypropylene resin as a main material , It is intended to minimize the change in length in accordance with the change in the external temperature and to prevent the breakage due to the impact by increasing the density of the product.
It is also possible to improve long-term deformation by impact strength, bending strength, thermal deformation temperature and load, to improve the lubricity of wood and resin, and to improve the moisture content of wood flour Absorbing, as well as nano-clay such as mica, talc, and bentol, thereby preventing deterioration of resin properties and increasing flame retardancy.
In addition, the use of a zeolite component substituted with a metal ion for an antimicrobial agent enables the antimicrobial activity to be exhibited over a long period of time.
In particular, the antimicrobial agent composed of the zeolite component enhances dispersibility during processing of the resin, reduces discoloration and deterioration of the resin, improves weatherability, and provides flame retardancy, so that an excellent flame retardant effect can be obtained without using a separate flame retardant.
In addition, the cross-section of the surface contact portion of the synthetic wood is formed in a trapezoidal shape with a lower profile to minimize the slip phenomenon by increasing the contact area, as well as to prevent breakage of the edge of the contact portion, To minimize post-shrinkage and cooling deformation occurring in the manufacturing process.
In addition, a printing layer is formed on the surface of the synthetic wood, and the printing layer is integrally formed on the upper surface as well as the side surface of the synthetic wood so that it can be visually recognized more easily when used in a stair or the like, will be.
In order to solve the above problems, the present invention provides a process for producing high strength flame retardant synthetic wood containing zeolite, comprising the steps of: pulverizing a coniferwood to a size of 60-100 mesh to produce wood powder; The wood powder is put into a dryer and heated at a temperature of 100 to 125 ° C. for 3 to 4 hours to dry the wood powder so that the water content in the wood powder is 5 wt% or less; 100 parts by weight of the dried wood powder, 8 to 13 parts by weight of polyethylene, 29 to 35 parts by weight of polypropylene, 3.5 to 4.5 parts by weight of a colorant, 3.8 to 4.5 parts by weight of a lubricant, and 5.3 to 5.8 parts by weight of a binder , Calcium carbonate or talc and one or more of mica, talc, bentol and antimony trioxide in a weight ratio of 1: 1, 1.4 to 1.8 parts by weight of an antioxidant, zinc, copper, 0.7 to 1.0 part by weight of an antimicrobial agent composed of zeolite substituted with one metal ion selected from the group consisting of mercury, tin, lead, bismuth, cadmium, chromium and thallium ion is put into the compounding machine, Mixing the mixture for 45 minutes to prepare a compound in the form of a chip having a size of 3 to 6 mm; Extruding the compound into an extruder hopper and extruding the mixture at a cylinder temperature of 180 to 250 DEG C and a die temperature of 150 to 190 DEG C for 5 to 15 minutes to produce a synthetic wood; And a cooling step of cooling the synthetic wood extruded in the extruder.
In this case, 100 parts by weight of wood powder dried in the compounding step, 8 to 13 parts by weight of polyethylene, 29 to 35 parts by weight of polypropylene, 3.9 parts by weight of colorant, 4.1 parts by weight of lubricant, 5.5 parts by weight of binder 8.3 parts by weight of a filler composed of any one of calcium carbonate or talc and one of mica, talc, bentol and antimony trioxide in a weight ratio of 1: 1, 1.55 parts by weight of an antioxidant, zinc, copper, silver, mercury, 0.83 parts by weight of an antimicrobial agent composed of zeolite substituted with one kind of metal ion selected from tin, lead, bismuth, cadmium, chromium and thallium ion is introduced into the compounding machine.
The high strength flame-retardant synthetic wood containing zeolite according to the present invention is prepared by the above-described production method, and comprises 100 parts by weight of dried conifer wood powder, 8 to 13 parts by weight of polyethylene with respect to 100 parts by weight of the wood powder, Wherein at least one of the polypropylene, the minor polypropylene, the colorant of 3.8 to 4.5 parts by weight, the lubricant of 3.8 to 4.5 parts by weight, the binder of 5.3 to 5.8 parts by weight, the calcium carbonate or the talc and any one of mica, talc, A filler which is composed of 8.0 to 8.5 parts by weight of a filler mixed in a weight ratio, 1.4 to 1.8 parts by weight of an antioxidant and at least one metal ion selected from the group consisting of zinc, copper, silver, mercury, tin, lead, bismuth, cadmium, And 0.7 to 1.0 part by weight of an antimicrobial agent composed of zeolite.
The synthetic wood has a width of 100 to 200 mm and a length of 15 to 35 mm. The upper surface of the composite wood has a trapezoidal trapezoidal shape having a length of 7 to 9 mm and a depth of 1 to 2 mm A plurality of contact portions formed in the shape of a circle having a width of 4 to 6 mm and a rear shrinkage preventing groove having a depth of 0.4 to 0.6 mm and a length of 1 to 2 mm are formed at the center of the contact portion .
In addition, a printing layer is formed on one side of the upper surface of the synthetic wood, in which a fluorescent material or a coloring material is formed by an integral molding with synthetic wood. The printing layer has an upper end exposed to the upper side of the synthetic wood, And a side projection is formed at a lower portion of the upper end and a side projection is projected upward and downward at an inner side of the side end.
The present invention minimizes the use ratio of the polyethylene resin in the material of the thermoplastic resin and minimizes the change in length according to the external temperature change by using the polypropylene resin as the main material and increasing the density of the product, It is possible to prevent breakage by
It is also possible to improve long-term deformation by impact strength, bending strength, thermal deformation temperature and load, to improve the lubricity of wood and resin, and to improve the moisture content of wood flour Absorbing, as well as nano-clay such as mica, talc, and bentol, thereby preventing deterioration of resin properties and increasing flame retardancy.
In addition, by using a zeolite component substituted by a metal ion for an antimicrobial agent, the antimicrobial activity can be exhibited over a long period of time.
In particular, the antimicrobial agent composed of the zeolite component improves the dispersibility in the processing of the resin, reduces the discoloration and deterioration of the resin, improves the weatherability and provides the flame retardant property, so that it has an excellent flame retardant effect without using any additional flame retardant.
In addition, the cross-section of the surface contact portion of the synthetic wood is formed in a trapezoidal shape with a lower profile to minimize the slip phenomenon by increasing the contact area, as well as to prevent breakage of the edge of the contact portion, Thereby minimizing post-shrinkage and cooling deformation occurring in the manufacturing process.
In addition, when a printed layer is formed on the synthetic wood surface, the printed layer is formed integrally with not only the upper surface but also the side surface of the synthetic wood so that it can be visually recognized more easily when used in a stair or the like, .
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a process drawing showing a method for producing a synthetic wood according to the present invention; FIG.
2 is a sectional view showing one embodiment of synthetic wood according to the present invention.
3 is a sectional view showing still another embodiment of the synthetic wood according to the present invention.
4 is a sectional view showing an example in which a printed layer is formed on the surface of synthetic wood in the present invention.
Hereinafter, the high strength flame retardant synthetic wood containing zeolite of the present invention will be described in detail with reference to the accompanying drawings.
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a process drawing showing a method for producing a synthetic wood according to the present invention. FIG.
The method for producing a synthetic wood according to the present invention is roughly divided into a crushing step, a drying step, a compounding step, an extrusion step and a cooling step.
The pulverization step is characterized by pulverizing the softwoodwood to a size of 60 to 100 mesh to produce wood flour.
The reason for using coniferous wood is that coniferous trees such as pine trees have a relatively dense structure and can have excellent strength.
When the size of the conifer wood is 60 to 100 mesh, when the size is less than 60 mesh, the wood is too large and the dimensional stability and elastic modulus of the synthetic wood deteriorate. When the size exceeds 100 mesh, In the blending process of blending them with each other, the woods are clumped together to make it difficult to blend with the resin component.
In the drying step, the wood powder prepared through the pulverization step as described above is put into a dryer and heated at a temperature of 100 to 125 ° C. for 3 to 4 hours to dry the wood so that the water content in the wood becomes 2 to 5 wt% do.
If the temperature is lower than 100 ° C, it takes a lot of time to dry the wood flour. If it exceeds 125 ° C, the wood flour is dried at a too high speed, causing the dense structure of the wood flour to twist.
If the moisture content of the wood powder exceeds the above range, moisture is evaporated in the process of extrusion molding and bubbles are generated, which weakens the bonding force with the resin and causes defects.
The compounding step is carried out by mixing 100 parts by weight of the dried wood powder, 8 to 13 parts by weight of polyethylene, 29 to 35 parts by weight of polypropylene, 3.5 to 4.5 parts by weight of colorant, 3.8 to 4.5 parts by weight of a lubricant, 8.0 to 8.5 parts by weight of a filler consisting of 5.8 parts by weight of a binder, calcium carbonate or talc and one of mica, talc, bentol and antimony trioxide in a weight ratio of 1: 1, 1.4 to 1.8 parts by weight of an antioxidant, 0.7 to 1.0 part by weight of an antimicrobial agent composed of zeolite substituted with one kind of metal ion selected from zinc, copper, silver, mercury, tin, lead, bismuth, cadmium, chromium and thallium ion is put into the compounding machine, And the mixture is stirred at a temperature of 30 to 45 minutes to produce a chip-like compound having a size of 3 to 6 mm.
In the above configuration, polyethylene (PE) and polypropylene (PP) are contained in an amount of about 20 to 30% by weight, and they are combined with wood to give moisture stability to wood and serve as a kind of adhesive.
In particular, polyethylene and polypropylene should be used in a weight ratio of 2: 3: 8 to 7, respectively.
The reason why the amount of polyethylene used is reduced and the amount of polypropylene used is increased is that the length of the polyethylene changes with external temperature changes and the shrinkage increases as the extrusion molding process is finished and the shrinkage ratio of the inside and outside of the synthetic wood Considering that it causes a large difference in bar strain, the use of polyethylene is reduced to prevent twisting due to temperature change.
In this case, the addition of a small amount of polyethylene without deformation of a large amount of deformed polyethylene resin is advantageous in that the polyethylene resin itself is excellent in chemical resistance and chemical resistance, and that the product is not broken or easily corroded and the properties are not deteriorated by direct sunlight To provide them to wood.
On the other hand, the colorant is configured to impart color stability, improve texture and color, as well as increase resistance to ultraviolet rays.
Specifically, the wood powder contains a highly soluble substance, and the wood powder moves to the surface to cause discoloration, and the wood product is made into a deep brown color. Therefore, the coloring agent is added to impart color stability to the synthetic wood, It enhances texture and color like wood and increases UV resistance.
The colorant is preferably used in an amount of 3.5 to 4.5 parts by weight based on 100 parts by weight of wood flour.
The lubricant improves the surface composition of the synthetic wood by increasing the dispersibility of the wood powder during the mixing of resin and wood.
In other words, it improves the workability of synthetic wood and increases productivity.
The lubricant is preferably used in an amount of 3.8 to 4.5 parts by weight based on 100 parts by weight of wood flour.
The binder improves the bonding strength between the resin and the wood powder, thereby increasing the bending strength and elastic modulus, and improving the dimensional stability, impact strength and dispersibility of the wood powder.
As an example of the binder, merleeenhydride polypropylene and the like may be used, and 5.3 to 5.8 parts by weight, based on 100 parts by weight of wood powder, are preferably used.
The filler improves the impact strength and bending strength of synthetic wood, the long-term deformation by heat deformation temperature and load, improves the lubrication of wood and resin, and improves workability by absorbing wood moisture.
For this purpose, the filler is composed of either calcium carbonate or talc.
At this time, any one selected from mica, talc, and bentol is mixed with any one selected from the above-mentioned calcium carbonate or talc in a weight ratio of 1: 1.
Mica, talc, and bentol are nano-layered clay minerals that are nonflammable and have gas barrier properties to form a barrier layer to reduce gas permeability. Therefore, they prevent contact with oxygen, thereby enhancing the antioxidative effect and further enhancing the flame retarding effect .
As a method for further doubling the flame retarding effect, antimony trioxide (Sb 2 O 3 ) may be used instead of the mica, talc, and bentol so as to increase the flame retardancy and not to deteriorate the physical properties of the resin.
Preferably, the filler is used in an amount of 8.0 to 8.5 parts by weight based on 100 parts by weight of wood flour.
Antioxidants prevent discoloration when exposed to resin and wood, prevent discoloration when exposed to ultraviolet rays, prevent access to oxygen, block ultraviolet rays to prevent deterioration of mechanical properties, and prevent discoloration .
Such an antioxidant may be an irganox series, an ultranox series, a TEP series or the like, and may be constituted by adding a UV blocking agent.
The antioxidant is preferably used in an amount of 1.4 to 1.8 parts by weight based on 100 parts by weight of wood flour.
The antimicrobial agent is preferably composed of a zeolite substituted with a metal ion selected from zinc, copper, silver, mercury, tin, lead, bismuth, cadmium, chromium and thallium ion so as to exhibit a stable antimicrobial activity over a long period of time. Is preferably used in an amount of 0.7 to 1.0 part by weight based on 100 parts by weight of wood flour.
The antibacterial agent composed of the zeolite component substituted by the metal ion has excellent dispersibility in the processing of the resin, and the discoloration and deterioration of the resin are extremely small. When the zeolite component is added, the antibacterial agent has a flame retardant effect suitable for the KS standard .
That is, it can be seen that the addition of a zeolite antimicrobial agent to the above components, without the use of a special flame retardant, provides flame retardancy to the synthetic wood.
In the present invention, the optimal composition of each composition in the compound preparation step is 100 parts by weight of dried wood powder, 8 to 13 parts by weight of polyethylene, 29 to 35 parts by weight of polypropylene, 3.9 parts by weight of 8.3 parts by weight of a filler consisting of a colorant, 4.1 parts by weight of a lubricant, 5.5 parts by weight of a binder, calcium carbonate or talc and one of mica, talc and bentol in a weight ratio of 1: 1, 1.55 parts by weight of an antioxidant, 0.83 parts by weight of an antimicrobial agent composed of zeolite substituted with one metal ion selected from zinc, copper, silver, mercury, tin, lead, bismuth, cadmium, chromium and thallium ion.
Subsequently, in the compounding step, the materials are put into a blender and stirred at a temperature of 110 to 160 ° C for 30 to 45 minutes to prepare a chip-shaped compound having a size of 3 to 6 mm.
At this time, when the temperature inside the blender is 110 ° C or less, it takes a long time to blend the polyethylene resin blended with the wood and the polypropylene resin melted and dried together with the dried wood, and a part of the polyethylene resin When the temperature inside the blender is higher than 160 DEG C, the higher the melting temperature, the more the product burns or discolors and the molding is not performed properly. Therefore, the physical properties are deteriorated And it is preferable to mix them in the mixer with stirring at a temperature of 110 ° C to 160 ° C for 10 to 20 minutes via a stirrer as in the present invention.
In addition, by making a chip type synthetic wood compound having a size of 3 to 6 mm through the compounding machine, the amount of the synthetic wood compound can be easily adjusted in the extruder in the next step of the extrusion molding, So that it can be easily stored and transported.
In the extrusion molding step, the compound is put into an extruder hopper and extruded while heating at a cylinder temperature of 180 to 250 ° C and a die temperature of 150 to 190 ° C for 5 to 15 minutes to produce a synthetic wood.
At this time, when the temperature of the cylinder and the die is lower than the above temperature, the compound can not be easily extruded and molded at a low temperature. If the temperature exceeds the above temperature, the compound burns or discolors to cause a property deterioration of the product. It is preferred to be produced under the same conditions.
The cooling step cools the synthetic wood extruded from the extruder.
As a concrete example, the cooling operation is performed by the cooling water (20 ± 5 ° C) installed on one side of the extruder, and it can be used semi-permanently in the outside environment such as the exterior wall material of the building, the roof, the housing fence, the terrace, Synthetic wood is produced.
The high strength synthetic wood of the present invention produced by the above-mentioned production method is characterized by comprising 100 parts by weight of dried conifer wood powder, 8 to 13 parts by weight of polyethylene, 29 to 35 parts by weight of polypropylene, 8.0 to 8.5 parts by weight of a coloring agent comprising 3.8 to 4.5 parts by weight of a lubricant, 5.3 to 5.8 parts by weight of a binder, one of calcium carbonate and talc, and one of mica, talc and bentol in a weight ratio of 1: 0.7 to 1.0 part by weight of an antimicrobial agent composed of a filler, 1.4 to 1.8 parts by weight of an antioxidant, and a zeolite substituted with one metal ion selected from zinc, copper, silver, mercury, tin, lead, bismuth, cadmium, .
2, the synthetic wood according to the present invention has a width of 100 to 200 mm and a length of 15 to 35 mm, and the upper surface has a length of 7 to 9 mm and a depth of A plurality of
In the case where the
This
The above-described structural feature is such that the length of the
This can prevent the sliding phenomenon by increasing the contact area of the conventional cylindrical contact portion compared to the case where there is a concern of safety accident frequently due to frequent occurrence of slipping when snow or rain.
In addition, the gap between the
Conventionally, since the width of the drainage channel for most products is less than 1 mm, it is not possible to properly perform the role of the drainage channel, and the width is too narrow to cause a crack when the piece is fastened.
In the present invention, the gap between the
In addition, by forming the cross-sectional shape of the
Conventionally, when the cross-sectional edge of the contact portion is formed in the shape of "a", the edge is broken or the contact portion is broken when the external impact is applied to the end portion during the surface machining operation such as abrasion or sanding, I could.
According to the present invention, such a
In addition, the
On the other hand, in the above-described structure, the
As shown in the figure, the
When the sidewall of the
Particularly, since the lower protruding
In addition, the side of the synthetic wood of the present invention constituted as described above may have a
As shown in Table 1 below, the synthetic wood of the present invention constituted as described above was satisfactory when the KS standard was over 3,400 N as a result of the strength of the certified test machine, but it was confirmed that the developed product had a sufficient strength as measured by 6,508 N.
In addition, it was confirmed that the flame retardancy measurement was satisfactory if the KS standard carbonization length was 20 cm or less, but it was satisfactory if the result of the official engine test was 12 cm and the remaining flame was 10 seconds or less.
10: contact portion 11: drain
20: post-shrinkage prevention groove 30: printing layer
31:
32:
40: clip coupling groove
Claims (5)
Pulverizing the softwood logs to a size of 60 to 100 mesh to produce wood flour; The wood powder is put into a dryer and heated at a temperature of 100 to 125 ° C. for 3 to 4 hours to dry the wood powder so that the water content in the wood powder is 5 wt% or less; 100 parts by weight of the dried wood powder, 8 to 13 parts by weight of polyethylene, 29 to 35 parts by weight of polypropylene, 3.5 to 4.5 parts by weight of a colorant, 3.8 to 4.5 parts by weight of a lubricant, and 5.3 to 5.8 parts by weight of a binder , Calcium carbonate or talc and one or more of mica, talc, bentol and antimony trioxide in a weight ratio of 1: 1, 1.4 to 1.8 parts by weight of an antioxidant, zinc, copper, 0.7 to 1.0 part by weight of an antimicrobial agent composed of zeolite substituted with one metal ion selected from the group consisting of mercury, tin, lead, bismuth, cadmium, chromium and thallium ion is put into the compounding machine, Mixing the mixture for 45 minutes to prepare a compound in the form of a chip having a size of 3 to 6 mm; Extruding the compound into an extruder hopper and extruding the mixture at a cylinder temperature of 180 to 250 DEG C and a die temperature of 150 to 190 DEG C for 5 to 15 minutes to produce a synthetic wood; And a cooling step of cooling the synthetic wood extruded from the extruder,
100 parts by weight of dried woodywood of wood, 8 to 13 parts by weight of polyethylene, 29 to 35 parts by weight of polypropylene, 3.5 to 4.5 parts by weight of a colorant, 3.8 to 4.5 parts by weight of a lubricant, 5.3 to 5.8 parts by weight of a binder , Calcium carbonate or talc and one or more of mica, talc and bentol in a weight ratio of 1: 1, 1.4 to 1.8 parts by weight of an antioxidant, zinc, copper, silver, mercury And 0.7 to 1.0 part by weight of an antimicrobial agent composed of zeolite substituted with one kind of metal ion selected from tin, lead, bismuth, cadmium, chromium and thallium ion.
(10) having a width of 100 to 200 mm and a height of 15 to 35 mm and formed on the upper surface of the upper surface in a trapezoidal shape with a vertical length of 7 to 9 mm and a depth of 1 to 2 mm, Shrinking prevention groove 20 having a depth of 0.4 to 0.6 mm and a length of 1 to 2 mm is formed at the center of the contact portion 10, Is formed,
High strength flame retardant synthetic wood containing zeolite.
And a printing layer (30) formed on one side of the upper surface of the synthetic wood, wherein a fluorescent material or a coloring material is formed of an injection material integrally formed with synthetic wood,
The printed layer 30 has an upper end 31 exposed on the upper side of the synthetic wood and a side end 32 exposed on the side of the synthetic wood,
Wherein a lower protruding portion 31a protruding on both sides is formed in a lower portion of the upper end portion 31 and a side protruding portion 32a protruding upward and downward is formed on an inner side of the side end portion 32. [
High strength flame retardant synthetic wood containing zeolite.
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| CN105153722A (en) * | 2015-07-31 | 2015-12-16 | 濮阳市东宝科技发展有限公司 | Flame-retardant antibacterial wood plastic material and preparation method thereof |
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| CN108727846A (en) * | 2018-05-14 | 2018-11-02 | 湖州统装饰材料有限公司 | A kind of manufacture craft of wood-plastic board |
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| KR102142575B1 (en) | 2020-05-06 | 2020-08-10 | 주식회사 임성 | Wood Plastic Composition having excellent Tensile Strength and Flame Retardant |
| CN111645163A (en) * | 2020-05-26 | 2020-09-11 | 青岛优菲信息技术有限公司 | Mildew-proof plate and processing method thereof |
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| KR20130123746A (en) | 2013-11-13 |
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