KR20140096418A - Biodegradable wood plastic composite and mobile phone case using the same - Google Patents
Biodegradable wood plastic composite and mobile phone case using the same Download PDFInfo
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- KR20140096418A KR20140096418A KR1020130008419A KR20130008419A KR20140096418A KR 20140096418 A KR20140096418 A KR 20140096418A KR 1020130008419 A KR1020130008419 A KR 1020130008419A KR 20130008419 A KR20130008419 A KR 20130008419A KR 20140096418 A KR20140096418 A KR 20140096418A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
- B27M1/02—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by compressing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
- B27M1/08—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by multi-step processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/02—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
Biodegradable polymer synthetic wood is disclosed. The present invention relates to a resin composition comprising 40 to 70 parts by weight of a PLA (Polylatic Acid or Polylactide) resin as a biodegradable polymer resin, 30 to 60 parts by weight of wood powder, 0.5 to 2.5 parts by weight of a compatibilizer and 1.0 to 2.0 parts by weight of a lubricant, And can be used as an environmentally friendly material in a cellular phone case.
Description
The present invention relates to a biodegradable polymer synthetic wood, a method for producing the same, and a cellular phone case using the same. More specifically, the present invention relates to a biodegradable polymer synthetic wood, The present invention relates to a biodegradable polymer synthetic wood (WPC), and a biodegradable WPC mobile phone case using the same, and a cell phone case using the biodegradable polymer synthetic wood.
WPC (wood plastic composte) is a synthetic polymer composite material produced by mixing wood-based materials such as wood powder and thermoplastic polymer resins such as polypropylene (PP), polyethylene (PE), and polyvinyl chloride (PVC) It can be processed and injection processed, and it is widely used in various fields such as building material such as deck material and automobile interior part material. Building materials WPC can be made by melt-blending wood chips made from sawdust and squatting wood obtained as a by-product in the processing of waste wood and natural wood together with thermoplastic polymer resin, which is attracting attention in view of environmentally friendly recycling of resources.
WPC products manufactured through extrusion processing are more economical and more economical than other products made only of pure wood or plastic, and are widely used as alternative materials in construction materials since they are environmentally friendly. WPC products manufactured through injection molding are more economical and more economical than those made of pure wood or plastic and are widely considered as alternative materials in automobile interior parts because they are environmentally friendly.
Recently, environmental pollution has emerged as a global problem, and environment friendly products are emerging rapidly. However, in the case of cell phones being launched on the market, only the convenience of the consumer and the user is taken into consideration, and it is made only for the purpose of supplementing the durability, grip, and aesthetics of the cellular phone. On the other hand, environmental considerations are relatively low, resulting in many environmental pollutants in the production and disposal of products. In addition, there are products which have problems of durability such as the problem that external impact is not transmitted to the mobile phone without filtration due to insufficient impact resistance of the material, the problem of being easily deformed by heat, and the convenience problems caused by loss of grip feeling by emphasizing only an aesthetic sense.
In case of cell phones sold on the market, they are made of materials such as silicon and acrylic, which is likely to cause environmental pollution problems during production. Considering the natural environment, it is disadvantageous in case of a product manufactured by processing natural wood.
DISCLOSURE OF THE INVENTION An object of the present invention is to provide a biodegradable polymer synthetic wood, a method of producing the biodegradable polymer synthetic wood, and a cellular phone case using the biodegradable polymer synthetic wood, wherein the biodegradable PLA (Polylactic Acid) I have to.
Another object of the present invention is to provide a biodegradable polymer synthetic wood capable of greatly improving workability and compatibility by adding a compatibilizing agent and a lubricant as other additives, a method for producing the same, and a cellular phone case using the same.
In order to achieve the above object, the biodegradable polymer synthetic wood according to the present invention comprises 40 to 70 parts by weight of PLA (Polylatic Acid or Polylactide) resin which is a biodegradable polymer resin, 30 to 60 parts by weight of wood powder, 2.5 parts by weight of a lubricant and 1.0 to 2.0 parts by weight of a lubricant are melt-mixed and compression-molded.
A method for producing a biodegradable polymer synthetic wood according to an embodiment of the present invention comprises: 40 to 70 parts by weight of PLA resin and 30 to 60 parts by weight of wood powder in an oven and heating to remove moisture; Further mixing 0.5 to 2.5 parts by weight of a compatibilizer and 1.0 to 2.0 parts by weight of a lubricant to the PLA resin and wood flour; Placing the mixture in a melt mixer and melt mixing; And separating the molten mixture and compression-molding the mixture through a compression molding machine.
In the melt mixing step, 0.1 to 5.0 parts by weight of a pigment is further added to the mixture and mixed.
The cell phone case according to another embodiment of the present invention is manufactured using the biodegradable polymer synthetic wood produced by the above-described manufacturing method.
The biodegradable polymer synthetic wood according to the present invention and the cellular phone case using the same are superior to the products made of general wood and are environmentally friendly. Recently, as environmental problems have emerged, interest in environmentally friendly products is increasing. In response to this situation, we have created eco-friendly products that can protect the environment. A large amount of wood flour contained in the WPC can be recycled to wood because it can be used in waste wood or natural timber processing, which is economical and economical because it can save the cost incurred in disposing the wood waste.
The plastic used can also inhibit the production of environmental pollutants that occurred when disposing of existing mobile phone cases that are released on the market by using PLA which is decomposed by microorganisms.
The product of the present invention is very environmentally friendly because it is made of recycled wood and PLA that can be decomposed by microorganisms, which frequently repeats production and disposal repeatedly due to short replacement period. This is suitable for modern society where environment-friendly products are emerging rapidly.
WPC is a product that can emphasize only the merits of PLA and wood by synthesizing PLA and its main material. It is possible to save the feeling of wood, which is the advantage of wood powder, and it is possible to biodegrade by adding PLA, so that harmful substances are not discharged at the time of disposal. Economical and environmentally friendly, this invention makes it possible for modern people to participate directly in solving environmental problems by using WPC mobile phone case, and it is different from existing cell phone case because it is economical.
Fig. 1 is a graph showing the mechanical properties of wood flour and PLA synthetic wood according to the contents of wood and PLA.
FIG. 2 is a graph showing the mechanical properties of wood powder and PLA synthetic wood according to the addition amount of the compatibilizer directly produced in the present invention by applying the optimal recipe obtained in FIG.
FIG. 3 is a photograph of a biodegradable WPC mobile phone case manufactured by applying the optimal recipe obtained in FIGS. 1 and 2. FIG.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a biodegradable polymer synthetic wood according to the present invention, a method of manufacturing the same, and a cellular phone case using the biodegradable polymer synthetic wood will be described in detail with reference to the accompanying drawings.
In the present invention, PLA (polylactide or poly (lactic acid)) was used as a thermoplastic polymer resin. PLA is a biodegradable plastic. PLA resin has biocompatibility and biocompatibility that biodegradable polymers are universally used. It has excellent thermal and mechanical properties compared with other biodegradable polymers such as PCL (polycaprolactone) and can be used in eco-friendly products have.
In the present invention, a new type biodegradable WPC mobile phone case is developed through compression molding of WPC. In the present invention, a biodegradable PLA other than PP, PE, and PVC, which are widely used for manufacturing WPC, was used to manufacture a more environmentally friendly WPC mobile phone case. Using the compatibilizer directly manufactured in the present invention, the interfacial adhesion between the wood and the PLA was improved, and a biodegradable WPC mobile phone casing having excellent mechanical strength was produced. In addition, a biodegradable WPC mobile phone case with enhanced aesthetic effect was produced by adding pigments and implementing various colors.
The present invention uses plastic synthetic wood as an eco-friendly material for making a cellular phone case, and uses PLA having biodegradability characteristics other than plastic such as PP and PE used in conventional WPC, It is meaningful to have made it. Therefore, not only can you take advantage of all the advantages of existing plastic mobile phone cases, but also it is eco-friendly because it has the characteristic of using wood flour as recycled material and biodegrading it when buried even after disposing it with general waste.
The cellular phone case manufactured by the environmentally friendly and economical WPC developed in the present invention can overcome the disadvantages of the cell phone cases presented above. In addition, all processes from making and disposing of mobile phone cases are environmentally friendly by using biodegradable PLA instead of ordinary plastic. In the present invention, a prototype of a cellular phone case was produced using wood powder / PLA synthetic wood. The importance of environment pollution problem has been highlighted, and PLA, which is a biodegradable plastic, has been used as a polymer matrix. In addition, compatibilizing agent and lubricant were added to improve the processability and compatibility of WPC and to find suitable processing conditions for the experiment.
The biodegradable polymer synthetic wood according to the present invention comprises 40 to 70 parts by weight of PLA (Polylatic Acid or Polylactide) resin which is a biodegradable polymer resin, 30 to 60 parts by weight of wood powder, 0.5 to 2.5 parts by weight of compatibilizer, And 2.0 parts by weight of a polypropylene resin were melt-mixed and compression-molded.
The method for producing the biodegradable polymer synthetic wood according to the present invention is as follows.
1. Put PLA resin and wood flour into oven to remove moisture.
40 to 70 parts by weight of PLA resin and 30 to 60 parts by weight of wood powder are removed in an oven at 105 deg. At this time, the wood powder preferably has a size of 170 to 180 mu m.
2. The PLA resin and wood flour are further mixed with a compatibilizing agent and a lubricant.
0.5 to 2.5 parts by weight of a compatibilizing agent and 1.0 to 2.0 parts by weight of a lubricant are further mixed.
3. The mixture is placed in a melt mixer and melt mixed.
The mixture is introduced into the melt mixer, and the mixture is melt-mixed while thoroughly mixing and mixing until the torque applied to the rotor is stabilized for mixing and stirring the melt at a temperature of 190 DEG C and a melt mixing condition of 60 rpm.
4. The molten mixture is separated and compression molded through a compression molding machine.
The synthetic wood can be produced through the above-described manufacturing method, and the cellular phone case can be manufactured using the synthetic wood thus produced.
At this time, 0.1 to 5.0 parts by weight of pigment may be further added to the mixture for imparting hue to the cellular phone case, if necessary.
Further, the melted and mixed molten mixture may be injected into a case of a cellular phone case, and a cellular phone case may be manufactured by compression molding.
In addition, the process for directly preparing a coloring agent is as follows.
1. Mix maleic anhydride (MA) and PLA resin at a mixing ratio of 1:10.
2. Dry the mixture.
3. Transfer the dried mixture into an internal mixer and melt-mix at 175 ° C and 60 rpm.
4. The molten mixture is compression molded using a hydraulic thermal compressor.
5. For ease of use, the compression molded compatibilizer specimen is pulverized into powder form.
<Examples>
Before making the cell phone case, the compatibilizer was manufactured directly. The MA resin (M625, 95%) of Sigma-Aldrich was used as the maleic anhydride (MA) used for the preparation of the compatibilizer, and PLA resin was purchased from Cargill Dow LLC PLA (Nature Works 4031 D, density = 1.25 g / cm < 3 >) was used. In order to make a compatibilizer, the mixture was mixed at a mixing ratio of MA: PLA = 1:10, dried and mixed, and then introduced into an internal mixer, followed by melt mixing at 175 ° C and 60 rpm. The mixed mixture was compression molded using a hydraulic thermal compressor, and the compatibilizer specimen, which was molded for easy use, was again pulverized into a powder form.
For the preparation of wood flour and PLA synthetic wood compounds, PLA resin used 50 parts by weight of the same PLA as in the preparation of the compatibilizer and 50 parts by weight of 177 mu m wood flour (Maple-8010 from G. Biotech) And 1.5 parts by weight of the compatibilizer prepared according to the present invention was added as an additive. Through the preliminary experiment, the content of the lubricant was fixed to 1.5 parts by weight, and the torque was properly applied to the rotor of the melt mixer. After completion of melt mixing, the melt mixture was separated from the melt mixer and the compression molding process was easy. Two parts by weight of pigment were used depending on the color to give a color.
The wood compound / PLA synthetic wood compound was first mixed with PLA, wood flour, compatibilizer and lubricant, and then dry blended. Then, the mixture was put into a melt mixer, and the mixture was melt- the rotor was sufficiently mixed until the torque applied to the rotor was stabilized, and then the molten mixture was taken out from the melt mixer and formed by compression molding using a mobile phone case mold.
The mechanical properties according to the ratio of the content of PLA resin to that of wood are shown in FIG. When 50 parts by weight of the PLA resin and 50 parts by weight of wood powder were added, the flexural characteristics were the highest and the impact strength was also high.
Fig. 2 shows the mechanical properties according to the addition amount of the compatibilizing agent in the optimum ratio of PLA resin (50 parts by weight of PLA resin and 50 parts by weight of wood powder). When 1.5 parts by weight of the compatibilizing agent was added, all the properties were improved.
FIG. 3 is a photograph of a prototype of a WPC mobile phone case prepared by adding a pigment to an optimal ratio of wood powder, PLA resin and compatibilizer determined in FIG. 2, and melt-blending the pigment. It can be seen from FIG. 3 that the mobile phone case has both eco-friendliness, functionality and aesthetics.
The scope of the present invention is not limited to the embodiments described above, but may be defined by the scope of the claims, and those skilled in the art may make various modifications and alterations within the scope of the claims It is self-evident.
Claims (4)
Further mixing 0.5 to 2.5 parts by weight of a compatibilizer and 1.0 to 2.0 parts by weight of a lubricant to the PLA resin and wood flour;
Placing the mixture in a melt mixer and melt mixing; And
Separating the molten mixture and compressing the molten mixture through a compression molding machine.
And 0.1 to 5.0 parts by weight of a pigment is further added to the mixture to mix the biodegradable polymer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020130008419A KR20140096418A (en) | 2013-01-25 | 2013-01-25 | Biodegradable wood plastic composite and mobile phone case using the same |
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020130008419A KR20140096418A (en) | 2013-01-25 | 2013-01-25 | Biodegradable wood plastic composite and mobile phone case using the same |
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| KR20140096418A true KR20140096418A (en) | 2014-08-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190046405A (en) * | 2017-10-26 | 2019-05-07 | 주식회사 폴우드 | a biodegradable and environment friendly wood plastic composites and manufacturing method thereof |
| KR102260113B1 (en) * | 2020-01-02 | 2021-06-03 | 한국기술교육대학교 산학협력단 | Compatibilizer for environment-friendly composite wood compound, environment-friendly composite wood compound, manufacturing method thereof, environment-friendly composite wood, and manufacturing method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190046405A (en) * | 2017-10-26 | 2019-05-07 | 주식회사 폴우드 | a biodegradable and environment friendly wood plastic composites and manufacturing method thereof |
| KR102260113B1 (en) * | 2020-01-02 | 2021-06-03 | 한국기술교육대학교 산학협력단 | Compatibilizer for environment-friendly composite wood compound, environment-friendly composite wood compound, manufacturing method thereof, environment-friendly composite wood, and manufacturing method thereof |
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