KR101757904B1 - Pellet Composition for Production of Deck Using Pine Nut Shell - Google Patents

Abstract

The present invention relates to a pellet composition for manufacturing a deck using a pellet, and more particularly, to a pellet composition for manufacturing a pellet using a pellet that enables the production of a synthetic wood having improved physical properties by using pellets as wood powder of synthetic wood. 20 to 40% by weight of hazelnut powder having a particle diameter of 10 to 30 탆, based on the total weight of the pellet composition; 30 to 50% by weight of a thermoplastic resin raw material; 10 to 20% by weight of a porous silica; At least one selected from the group consisting of a graft binder, a filler, an antimicrobial agent, an antioxidant, a pigment, a plasticizer, a compatibilizer, a lubricant, a UV stabilizer and a nucleating agent.

Description

Technical Field [0001] The present invention relates to a pellet composition for producing a deck,

The present invention relates to a pellet composition for manufacturing a deck using a pellet, and more particularly, to a pellet composition for manufacturing a pellet using a pellet that enables the production of a synthetic wood having improved physical properties by using pellets as wood powder of synthetic wood.

Wood Plastic Composite, which is widely used as a building material, is now in demand for its excellent physical properties as a finishing material for indoor and outdoor, while complementing the disadvantages of natural wood and wood preservative. Such synthetic woods are mainly made of wood flour and synthetic resin, and wood flour plays a role in showing the inherent characteristics of natural wood such as pattern and texture in synthetic wood. And wood flour is mainly byproducts such as toppings and shavings that are generated in the processing of wood. However, in the case of wood flour obtained in this manner, it is difficult to produce synthetic wood having the same physical properties by being collected from various species having different specific gravity and fiber length. In addition, improvement of various physical properties including product processability, bending strength and impact strength, etc. is demanded in synthetic wood which is made from such wood powder as raw material.

On the other hand, the Pinus koraiensis is an economic species with pine nut as a fruit, and is well known as a tree that emits a large amount of phytoncide along with a plain tree. However, other byproducts such as spatula are left in the soil as environmental pollutants without proper use, and some are used as simple toilets or inexpensive fertilizers, but most of them are discarded and development of research utilizing them is necessary.

Many researches have been carried out to try woody biomass such as zippy as a raw material of synthetic wood, and related prior art is known.

Patent Registration No. 10-1100404 discloses that 28 to 60% by weight of wood powder, which is mainly composed of artificial wood and synthetic resin, is mixed with walnut shells having excellent physical and chemical properties to form various artificial woods, An artificial wood composition comprising a walnut shell powder comprising 15 to 25% by weight of a thermoplastic synthetic resin, 10 to 25% by weight of a walnut shell powder, and 7 to 22% by weight of an auxiliary ingredient for addition, and an artificial wood made using the same.

The prior art is characterized in that a synthetic wood having improved physical properties is prepared by adding a walnut shell to a raw material of a conventional synthetic wood. However, in the case of walnut shells, it is difficult to be processed in the process due to high water content and density, and it is difficult to ensure the uniformity of the synthetic wood produced by using conventional wood flour, and natural wood flour However, the prior art does not disclose such a technique. Also, there is not disclosed a composition for a synthetic wood having excellent bending strength and impact strength as compared with the prior art required in deck synthetic wood.

The present invention has been made to solve the problems of the prior art and has the following purpose.

Prior Art 1: Patent Registration No. 10-1100404 (published by Bingjin Industrial Co., Ltd., December 30, 2011) Artificial wood composition containing walnut shell powder and artificial wood made using the same

It is an object of the present invention to provide a pellet composition for manufacturing a deck using a hazelnut which enables environmental and economic problems to be solved by using hazelnut classified as woody biomass as wood flour of synthetic wood, .

According to a preferred embodiment of the present invention, the pellet composition for manufacturing a deck using the pellets comprises 20 to 40% by weight, based on the total weight of the pellet composition, of pellet powder having a particle diameter of 10 to 30 m; 30 to 50% by weight of a thermoplastic resin raw material; 10 to 20% by weight of a porous silica; At least one selected from the group consisting of a graft binder, a filler, an antimicrobial agent, an antioxidant, a pigment, a plasticizer, a compatibilizer, a lubricant, a UV stabilizer and a nucleating agent.

According to another preferred embodiment of the present invention, the hazelnut powder comprises 10 to 20% by weight of lignin based on the total weight of the hazelnut powder.

According to another preferred embodiment of the present invention, the weight ratio of the porous silica: zapper powder: resin raw material is 1: 1 to 1.5: 2.5.

According to another preferred embodiment of the present invention, the porous silica becomes an amorphous alumina silicate.

According to another preferred embodiment of the present invention, the graft binder is a tetrahydrophthalic anhydride.

According to another preferred embodiment of the present invention, a board for a deck manufactured from a pellet composition for manufacturing a deck becomes a board.

The pellet composition according to the present invention solves the environmental problem by using the biomass that is left as an environmental pollutant, and also has the economic effect of reducing the raw material cost. The pellet composition according to the present invention allows the wood to be produced from the pellet composition to be mass-produced to the same standard by using wood powder derived from one species. The pellet composition according to the present invention makes it possible to produce synthetic wood with improved mechanical properties based on high specific gravity of pine wood and insect resistance, dirt resistance, durability and inherent antimicrobial properties due to dense fiber structure . Also, the pellet composition according to the present invention can improve the dyeability of the synthetic wood by using the sesame seed powder containing 10 to 20% by weight of lignin, and can prevent the deterioration of the physical properties such as the mechanical strength of the synthetic wood .

The pellet composition for manufacturing a deck using the pellets according to the present invention comprises 20 to 40% by weight of a pellet powder having a particle diameter of 10 to 30 m, based on the total weight of the pellet composition; 30 to 50% by weight of a thermoplastic resin raw material; 10 to 20% by weight of a porous silica; At least one selected from the group consisting of a graft binder, a filler, an antimicrobial agent, an antioxidant, a pigment, a plasticizer, a compatibilizer, a lubricant, a UV stabilizer and a nucleating agent.

The pellet composition according to the present invention can be used in wood for producing decks, but not limited thereto, and can be used in any field in which synthetic wood can be applied. The pellet composition may be composed of a jute pellet powder, a thermoplastic resin raw material, and porous silica, and other additives may be additionally used. The raw materials can be prepared as a pellet composition for synthetic wood by a molding process such as a co-extrusion method, a general extrusion and an injection method after a series of mixing and drying processes.

The term "pine nuts" means pine leaves removed from pine nuts surrounded by scales of pine nuts (Pinus koraiensis). However, the pine nuts in the specification of the present invention means that the by-products of pine nuts contained inevitably in the process of collecting pine nut . The byproducts of pine wood are largely bark and leaf of pine tree, and bark generally accounts for 10% of the total amount of pine tree. The raw material of bark containing the bark is thus used as wood flour of synthetic wood, which can be advantageous for expressing the texture of natural wood.

On the other hand, it may be advantageous for the raw material used as wood flour to have a low water content. The wood powder having a high water content may be easily carbonized during the processing or evaporation of water remaining in the wood may cause weakening of the bonding strength in the process of blending with other raw materials, . In general, the raw material of the puddle to be collected generally has a relatively low water content of 6.13% as compared with conventional wood pulp having a water content of 8%, which is advantageous for processing, but an additional drying process can be carried out to improve durability, weatherability and strength . The drying process may be carried out in an apparatus equipped with a high temperature condition of 80 to 100 DEG C and may be carried out by a drying method such as hot air drying and may be carried out in a closed chamber equipped with a rotary dryer, But not limited to, various drying methods and apparatus known in the art. In addition, the drying process of the raw material can be completed only once, but a series of drying processes can be additionally performed if necessary. In order to prolong the life of the product by providing a good environment for propagating bacteria, a large amount of moisture in the wood can have a water content of preferably 6% or less, more preferably 3% or less .

On the other hand, the feedstock may be 20 to 40% by weight based on the total weight of the pellet composition. When the feedstock content exceeds 40% by weight, the amount of the thermoplastic resin material to be added is relatively decreased, which may reduce the flow of the melt, which has a great influence on the mixing and molding. On the contrary, if the raw material of the seed material is less than 20% by weight, the pattern and texture unique to the wood which should appear on the surface of the synthetic wood are not displayed.

It may be advantageous to have a particle size of 10 to 30 [mu] m so that the nature of the natural wood can be well represented in the synthetic wood, while allowing the pellet material to be homogeneously mixed with other ingredients for the pellet composition. The feedstock can be pulverized using any pulverizer known in the art, and the feedstock pulverized to a certain particle size by a pulverizer is referred to as a seed pulp powder in the specification of the present invention.

On the other hand, it can be advantageous that the synthetic wood can be made of wood powder having excellent elasticity so as to have excellent durability while enduring high load, and it is advantageous to use wood powder having antimicrobial properties in order to compensate for the disadvantage of natural wood powder which is vulnerable to insect pests have. Compared with broad-leaved trees, the coniferous fibers are dense and have a high specific gravity, so they have excellent restorative properties. The coniferous pine trees have excellent antimicrobial properties and can be the most desirable species for wood flour. Additives such as antimicrobial agents may be used for higher antimicrobial activity, but are not limited thereto.

On the other hand, wood flour may be advantageous to use only those derived from one species. Depending on the tree species from which the wood is derived, properties such as fiber length and specific gravity are different, which affects the formulation and processing process and the quality of the produced product. In order to produce high quality synthetic wood reproducibly, it may be desirable to use tree species derived from one tree species or a tree species having similar characteristics.

Synthetic wood can be made of synthetic wood without additional pigment treatment based on the dark color of the seeds, but the delignification process can be carried out to produce synthetic wood in various colors. The delignification process means that the lignin component is removed from wood or other plants having cellulose, hemicellulose and lignin as main constituents in order to facilitate coloring of the pigment additive, thereby bleaching the lignin component. Specifically, the delignification process can be performed by immersing the sesame seed powder into a basic solution such as ammonium hydroxide, sodium hydroxide, sodium chlorite, sodium carbonate and potassium hydroxide using the properties of lignin eluted from the basic solution. If the lignin content is less than 10% by weight, the whiteness of the synthetic wood becomes excellent and the coloring by the pigment becomes easy. However, when the lignin content is less than 10% by weight, the impact strength and the bending strength There is a problem that mechanical properties are deteriorated. When the lignin content exceeds 20% by weight, coloration of bright colors such as yellow and beige becomes almost impossible, and smoke and smell due to carbonization of the Izumi powder in processing And the like. Accordingly, the content of lignin in the hazelnut can be preferably 10 to 20% by weight. For the content of lignin satisfying the above range, the immersion time of the sesame seed powder in the basic solution can be controlled. In the case of the hazelnut powder having a particle diameter of 10 to 30 탆, the soaking time may be 8 to 10 hours, but the present invention is not limited thereto, and the time required for soaking may be prolonged or shortened depending on the specific surface area of the hazelnut powder.

The thermoplastic resin raw material may be a recycled resin, a new resin, or a mixture thereof, and may be a thermoplastic resin known in the art, preferably polyethylene (PE), high density polyethylene (HDPE), low density polyethylene (LDPE) Polyolefin resins such as propylene (PP), polystyrene (PS) and polyethylene terephthalate (PET), or resins such as polyvinyl chloride (PVC) may be used. The kind of the resin raw material added to the pellet composition may be appropriately selected depending on the use of the synthetic wood, and one or more of them may be added in combination. For example, in the case of synthetic wood for decks requiring high impact strength and bending strength, it may be advantageous to add HDPE having good resistance to cracking resistance, and in the case of indoor and outdoor finishes requiring excellent surface texture, a high melt flow index A polyethylene resin such as LDPE having a high density polyethylene (MFI) may be advantageous. However, the type and content of the resin blended to produce a composition having various physical properties can be appropriately adjusted.

On the other hand, the resin material may be 30 to 50% by weight based on the total weight of the pellet composition of the present invention. When the amount of the resin raw material is less than 30% by weight, there is a possibility that the workability is lowered or the strength and dimensional stability of the synthetic wood are lowered during the extrusion and injection molding process. When the resin raw material is more than 50% by weight, It is difficult to develop a unique texture of natural wood. Therefore, it is advantageous that the resin material added to the pellet composition satisfies the above range, and the amount of the product in which the pellet composition is used can be adjusted depending on the use.

The porous silica may be a mesoporous silica having an innumerable pore structure of 2 to 50 nm in size. The porous silica is preferably 10 to 20% by weight based on the total weight of the pellet composition. The porous silica can reduce the specific gravity of the synthetic wood, thereby facilitating transportation and handling. In addition, Can be advantageously used as a carrier for additives. The porous silica may be silicon dioxide, molybdate, diatomaceous earth, amorphous alumina silicate, but not limited thereto, silica having a high specific surface area or silica having a wormhole structure may be used.

Various additives may be used for improving the physical properties of the pellet composition.

The other additives may preferably be from 3 to 10% by weight based on the total weight of the pellet composition and may be selected from the group of additives consisting of a graft binder, a filler, an antimicrobial, an antioxidant, a pigment, a plasticizer, a compatibilizer, a lubricant, a UV stabilizer and a nucleating agent At least one of them may be selected and appropriately blended so as to satisfy the above weight range.

The raw material of pellets added to the pellet composition is hydrophilic due to a large amount of hydroxyl groups (-OH) of the cellulose constituting pellets, while the resin generally has a hydrophobic property. Therefore, it is advantageous to use a graft binder that helps the new chemical bond at the interface between the two materials. The graft binder is preferably a maleic anhydride having excellent bonding strength, but not limited thereto, and various binders such as tetrahydrophthalic anhydride, which are known in the art for helping bonding with synthetic resins, Can be used. The graft binder may preferably have from 1 to 3% by weight based on the total weight of the pellet composition.

An inorganic material such as talc or mica may be used as a filler in order to improve thermal deformation temperature and bending strength and to improve durability, and if necessary, a separate water-treated material may be used.

An antimicrobial agent may be additionally used for enhancing the stain resistance and the resistance to insolubility, and for example, antimicrobial agents known in the art may be used, such as cotton, eucalyptus shell or zeolite, have.

An antioxidant may be used to prevent deterioration of the physical properties of the pellet composition from environmental conditions such as light, heat and oxygen, and preferably antioxidants such as phenol, phosphate and amines may be used, Various antioxidants known in the art may be used.

Organic pigments and inorganic pigments can be used to apply various colors to the wood, and the porous silica added to the pellet composition serves as a carrier for such pigments to help improve dyeability.

A plasticizer that relaxes the bonding force between the polymers may be used to improve the flow of the melt composed of the Izmit powder and the thermoplastic resin raw material. Depending on the type of resin, the type of plasticizer to be added may be one or more, and various types of plasticizers known in the art may be used.

A silane such as vinylsilane or aminoethyl silane may be used as the compatibilizer and may be used to increase the dispersibility of the sesame seed powder in the melt of the sesame seed powder and the resin raw material.

Lubricants can be used to reduce the friction between the raw ingredients added to the pellet composition during the kneading process. The lubricant may preferably be an acid amide, fluoropolymer, fatty acid or hydrocarbon based, but not limited to, various lubricants known in the art may be used.

The synthetic resin may be discolored by ultraviolet rays or may be reduced in strength due to generation of cracks, so that it may be advantageous to use an ultraviolet stabilizer to prevent it. The ultraviolet stabilizer may preferably be a benzophenone based, benzotriazole based, cyano acrylate based, benzoate based, hindered amines and triazine based, but not limited to, various ultraviolet stabilizers known in the art .

The nucleating agent may be used to improve the toughness of the resin material, and sorbitol-based or carbonic acid metal salts may be used, but not limited thereto, and nucleophilic agents known in the art may be used.

The pellet composition for manufacturing a deck using the pellets according to the present invention can be prepared by a known method of melt-kneading and pelletizing the pellet. For example, the melt-kneading of the composition can be carried out using a uniaxial extruder or a twin-screw extruder, and the introduction of each component of the composition can be carried out by using a powdery or pellet-like resin such as jute pellets powder, porous silica, graft binder, The necessary additives may be blended using suitable means such as hand blending or Banbury mixer and then introduced into the extruder or some of the components may be metered into other locations of the extruder. After the melt kneading is completed, it can be pelletized and used in the next step.

In addition, the present invention provides a board for a deck manufactured by molding the above-described pellet composition. The deck board is a molded article manufactured by a known method such as injection, extrusion, and press.

An embodiment of the pellet composition according to the present invention will be described below.

Example

Example 1

25% by weight, based on the total weight of the pellet composition, of jute pellets having a particle size of 10 to 30 m and a lignin content of 20% by weight; PE resin 45 wt%; 20% by weight of amorphous alumina silicate; 2% by weight of tetrahydrophthalic anhydride; 1% by weight of talc; 1% by weight zeolite; 1% by weight of a phenolic antioxidant; 0.5% by weight of an inorganic pigment; 1% by weight of DOP plasticizer; 1% by weight of an ethylene acrylic acid copolymer compatibilizer; 1% by weight of a fatty acid-based lubricant; 0.5% by weight of a hindered amine ultraviolet stabilizer; And 1% by weight of a sorbitol type nucleating agent.

Example 2

A pellet composition was prepared in the same manner as in Example 1, except that the Izumi powder completely removed of lignin was used.

Example 3

A pellet composition was prepared in the same manner as in Example 1, except that the weight ratio was adjusted to 55 wt% of PE resin and 10 wt% of amorphous alumina silicate.

Example 4

A pellet composition was prepared in the same manner as in Example 1, except that the weight ratio was adjusted to 35 wt% of the PE resin and 30 wt% of the amorphous alumina silicate.

Comparative Example

Comparative Example 1

A pellet composition was prepared in the same manner as in Example 1, except that a conventional wood having a lignin content of 20% by weight was used instead of the seed powder.

Comparative Example 2

A pellet composition was prepared in the same manner as in Example 1, except that the conventional wood in which lignin was completely removed was used instead of the seed powder.

Comparative Example 3

A pellet composition was prepared in the same manner as in Example 1, except that zeolite was not used.

Comparative Example 4

The pellet composition was prepared in the same manner as in Comparative Example 1, except that zeolite was not used.

The specific gravity, impact strength, water absorption rate, bending strength and antibacterial property of the pellet composition prepared through Examples and Comparative Examples were tested according to KS F 3230 standard, and the test results are shown in the following table.

Impact strength was measured by using 5 specimens according to KS M ISO 179-1, and the average value of 5 specimens was calculated as kJ / ㎡ in terms of impact strength a _cU according to the following formula . (E _c : corrected absorbed energy (J) by breakage of the specimen, h: thickness of the specimen (mm), b: width of the specimen (mm)

a _cU =

For the measurement of the water absorption rate, a specimen having a length of 100 mm was prepared, and the specimen was immersed in water at 100 ° C for 5 hours so as not to contact the bottom of the water bath. The specimens were then immersed immediately in water (23 ± 2) ° C for 20 minutes, and then the surface of the specimens was completely removed and the mass change was measured (W ₁ = mass before immersion (g), W ₂ = Mass (g))

Mass change rate (%) =

The flexural strength was measured according to the standard measurement method described in KS F 3230: 2013 for the maximum flexural load. Antimicrobial activity was measured according to KFIA-FI-1002.

Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 importance 1.150 1.143 1.245 1.201 1.150 Impact strength (KJ / ㎡) 4.6 4.3 4.2 3.9 4.6 Water Absorption Rate (%) 0.83 0.84 1.4 1.4 0.83 Flexural strength (N / mm2) 35 32 27 23 35 Dyeability ○ ○ ○ ○ ○

Example 1 Comparative Example 1 Comparative Example 3 Comparative Example 4 Antimicrobial activity (%) 99.9 99.9 89.3 77.6

Example 1 Example 3 Example 4 importance 1.15 1.25 1.1 Impact strength (KJ / ㎡) 4.6 4.8 4.2 Flexural strength (N / mm2) 35 38 32 Formability ○ ○ ○

From Table 1, it can be seen that Example 1 and Comparative Example 1 having a lignin content of 20% by weight have a relatively high impact strength and bending strength compared to Example 2 and Comparative Example 2 in which lignin is completely removed, It can be seen that the proper amount of lignin does not deteriorate the dyeability of the wood. Also, it can be seen that the Izumi powder has inherent antibacterial properties and is superior in water absorption to the conventional synthetic wood.

From Table 2, it can be seen that the antiseptic properties of the sesame seed powder are superior to those of conventional wood powder.

It can be seen from Table 3 that the mechanical strength is improved when the ratio of the resin material added is increased, and the specific gravity is decreased when the ratio of the porous silica is increased. Also, it can be seen that the pellet composition in which the weight ratio of the porous silica: zapper powder: resin is 1: 1 to 1.5: 2.5 has the most suitable properties for the production of synthetic wood.

The pellet composition according to the present invention solves the environmental problem by using the biomass that is left as an environmental pollutant, and also has the economic effect of reducing the raw material cost. The pellet composition according to the present invention allows the wood to be produced from the pellet composition to be mass-produced to the same standard by using wood powder derived from one species. The pellet composition according to the present invention makes it possible to produce synthetic wood with improved mechanical properties based on high specific gravity of pine wood and insect resistance, dirt resistance, durability and inherent antimicrobial properties due to dense fiber structure . Also, the pellet composition according to the present invention can improve the dyeability of the synthetic wood by using the sesame seed powder containing 10 to 20% by weight of lignin, and can prevent the deterioration of the physical properties such as the mechanical strength of the synthetic wood .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention . The invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

Claims (6)

With respect to the total weight of the pellet composition,
25% by weight of the haze powder having a particle diameter of 10 to 30 탆;
45% by weight of a polyethylene resin raw material;
20 wt% of amorphous alumina silicate as porous silica used as a raw material in raw material pellet composition for deck production; And
10% by weight of other additives,
The Izmit powder comprises 20% by weight of lignin based on the total weight of the Izumi powder by a delignification process in which the powder is immersed in a potassium hydroxide solution for 8 to 10 hours,
2% by weight of tetrahydrophthalic anhydride; 1% by weight of talc; 1% by weight zeolite; 1% by weight of a phenolic antioxidant; 0.5% by weight of an inorganic pigment; 1% by weight of DOP plasticizer; 1% by weight of an ethylene acrylic acid copolymer compatibilizer; 1% by weight of a fatty acid-based lubricant; 0.5% by weight of a hindered amine ultraviolet stabilizer; And 1% by weight of a sorbitol type nucleating agent,
The amorphous alumina silicate: Izmit powder: polyethylene resin material has a weight ratio of 1: 1.25: 2.25,
The specimens were measured according to KS F 3230 to have a specific gravity of 1.150, an impact strength of 4.6 kJ / m ² , a water absorption rate of 0.83% and a flexural strength of 35 N / mm ² , The average value is calculated according to the following formula,
a _cU =

(Ec: corrected absorbed energy (J) by breakage of specimen, h: thickness of specimen (mm), b: width of specimen (mm)
The test piece was measured for antibacterial activity according to KFIA-FI-1002. As a result, the reduction rate of the number of bacteria per initial number of bacteria was 99.9%
A raw material pellet composition for manufacturing a deck using.
A board for a deck manufactured from a raw pellet composition for manufacturing a deck according to claim 1.
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