KR100864812B1 - Manufacturing Method of Wood Structure Material Using Bamboo - Google Patents

Manufacturing Method of Wood Structure Material Using Bamboo Download PDF

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KR100864812B1
KR100864812B1 KR1020070010621A KR20070010621A KR100864812B1 KR 100864812 B1 KR100864812 B1 KR 100864812B1 KR 1020070010621 A KR1020070010621 A KR 1020070010621A KR 20070010621 A KR20070010621 A KR 20070010621A KR 100864812 B1 KR100864812 B1 KR 100864812B1
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bamboo
wood
structural material
present
heat
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KR1020070010621A
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Korean (ko)
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KR20080072200A (en
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서영제
타카토시 기요오카
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주식회사 민건
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27J—MECHANICAL WORKING OF CANE, CORK, OR SIMILAR MATERIALS
    • B27J1/00—Mechanical working of cane or the like
    • B27J1/02—Braiding, e.g. basket-making
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D3/00—Veneer presses; Press plates; Plywood presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27J—MECHANICAL WORKING OF CANE, CORK, OR SIMILAR MATERIALS
    • B27J1/00—Mechanical working of cane or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/02—Processes; Apparatus
    • B27K3/0271—Vapour phase impregnation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
    • B27K5/001—Heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K9/00—Chemical or physical treatment of reed, straw, or similar material
    • B27K9/002—Cane, bamboo
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/13—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board all layers being exclusively wood

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Forests & Forestry (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Abstract

본 발명은 대나무를 가로와 세로로 절단하고 롤러프레스에 넣어 죽해섬상태로 제조하는 단계와, 상기 죽해섬상태의 대나무를 밀폐된 건류고압장치에 넣고 증기를 주입한 다음 5기압의 압력으로 156~160℃의 온도로 1시간~6시간 가열가압하여 건류시키는 단계와, 상기 건류된 죽해섬상태의 대나무를 형틀에 넣어 종횡으로 적층하는 단계와, 상기 적층된 대나무를 열프레스로 가열가압하여 구조재 형태로 성형하는 단계로 이루어진 대나무를 이용한 구조재 제조방법을 제공하기 위한 것으로, 본 발명은 대나무는 3년이면 안정된 품질의 성죽(成竹)이 되어 목재로써 활용이 가능할 뿐만 아니라 대단히 빠른 생육 사이클을 갖는 것이어서 삼림자원, 즉 목재의 보전에도 큰 도움이 될 수 있고, 무엇보다 대나무는 대나무의 세포조직이 매우 치밀하고 강인해서 내마모성과 가공성이 우수하고, 신축성이 낮아 뒤틀림이 적은 효과를 가질 뿐만 아니라 항균, 항곰팡이, 단열 및 방습, 보온, 탈취 등 물리적 특성도 매우 우수한 구조재를 제공할 수 있는 매우 유용한 발명인 것이다.The present invention comprises the steps of cutting the bamboo horizontally and vertically and putting it in a roller press in the state of bamboo shoots, and put the bamboo of bamboo shoots in a sealed dry distillation high pressure device and injecting steam and then at 156 to 5 atm. 1 hour to 6 hours by heating and pressurizing to dry at a temperature of 160 ℃, the step of putting the dried bamboo bamboo in the dried bamboo state into a mold and stacked vertically and horizontally, and heat-pressing the laminated bamboo with a heat press to form a structural member In order to provide a method for manufacturing a structural material using a bamboo made of a step of forming, as the present invention bamboo is a three-year stable quality of the porridge (成 竹) can be utilized as a wood as well as having a very fast growth cycle It can be a great help for the conservation of forest resources, that is, wood. Above all, bamboo has very dense and strong tissues Excellent in wear resistance and processability, and would be very useful inventors that not only has a low torsional elasticity less effective to provide an antibacterial, antifungal, excellent structural material also physical properties such as heat insulating and moisture-proof, insulating and deodorization.

대나무, 목재, 구조재 Bamboo, wood, structural

Description

대나무를 이용한 구조재 제조방법{Manufacturing Method of Wood Structure Material Using Bamboo}Manufacturing Method of Wood Structure Material Using Bamboo}

도 1 - 본 발명 구조재의 제조를 위한 죽해섬의 사진도.1-A photographic view of Jukhae Island for the manufacture of structural materials of the present invention.

도 2 - 본 발명 구조재(원형)의 단면 사진도.2-A cross-sectional photographic view of the structural member (circle) of the present invention.

도 3 - 본 발명 구조재의 압축실험 사진도.3-Compression test photographic picture of the structural material of the present invention.

도 4 - 본 발명 구조재의 압축실험 결과 그래프도.4-Compression test result graph of the structural material of the present invention.

도 5 - 본 발명 구조재의 내화실험 사진도.5-fire resistance test picture of the structural material of the present invention.

도 6 - 본 발명 구조재의 내화실험 결과 그래프도.6-graph of the fire resistance test results of the structural material of the present invention;

도 7 - 본 발명 구조재의 파괴실험 사진도.7-Fracture test photographic view of the structural material of the present invention.

도 8 - 본 발명 구조재의 파괴실험 결과 그래프도.8-Graph of the fracture test results of the structural material of the present invention.

본 발명은 대나무를 이용한 구조재 제조방법에 관한 것으로, 더욱 상세하게는 대나무로 죽섬유를 제조하고, 상기 죽섬유를 건류시킨 뒤 이를 형틀에 종횡으로 적층하고, 이를 열프레스로 압착하여 다양한 목재제품으로 가공할 수 있도록 하기 위한 매우 친환경적인 구조재를 제조하기 위한 방법에 관한 것이다.The present invention relates to a method for manufacturing a structural material using bamboo, and more particularly, to prepare bamboo fiber with bamboo, and dried the bamboo fiber and laminated it vertically and horizontally in a mold, and then compress it with a heat press to be processed into various wood products It relates to a method for manufacturing a very environmentally friendly structural material to enable.

목재 구조재는 각재나 판재, 기타 제품으로 가공되기 이전의 상태를 의미하는 것으로, 종래에는 천연목재 자원이 풍부하지 못한 우리나라는 물론 전세계적으로 환경보호를 위해 천연 목재 구조재보다는 폐목재 및 폐지, 폐섬유 등을 잘게 쪼갠 파쇄조각에 합성수지 접착제 등을 첨가하여 성형, 열압시켜서 제조하고 있다.Wood structural material refers to the state before processing into lumber, plate, and other products. Conventionally, wood and waste paper, waste fiber, rather than natural wood structural materials are used to protect the environment in Korea as well as globally. It is manufactured by adding a synthetic resin adhesive or the like to a shredded piece that has been shredded and molded and hot pressed.

그러나 종래의 구조재 역시 목재를 주원료로 하는 단점을 갖는 것이고 열에 약하고, 방충 및 방습, 보온 등이 취약하고, 뒤틀림(휨)이 발생하기도 하며, 가공성이 떨어지는 등 건축 및 토목, 기타 용도의 구조재로 사용하기에는 곤란한 폐단을 갖는 것이다.However, conventional structural materials also have the disadvantage of using wood as a main raw material, and are weak to heat, weak in insect repellent, moisture proof, and warmth, and may be warped (warp), and have poor workability. It is difficult to have a closed end.

따라서 상기한 조건을 모두 만족하는 구조재를 찾기란 결코 용이한 일이 아니며, 또한 가격이 저렴하면서도 대량생산도 가능하고, 환경보호의 측면까지 고려되는 경우 그 재질의 범위는 더욱 한정적일 수밖에 없는 것이다.Therefore, it is not easy to find a structural material that satisfies all of the above conditions, and it is inexpensive, mass production is possible, and the scope of the material is inevitably limited in consideration of environmental protection.

본 발명자는 대나무는 3년이면 안정된 품질의 성죽(成竹)이 되어 목재로써 활용이 가능할 뿐만 아니라 대단히 빠른 생육 사이클을 갖는 것이어서 삼림자원, 즉 목재의 보전에도 큰 도움이 될 수 있고, 무엇보다 대나무는 대나무의 세포조직이 매우 치밀하고 강인해서 내마모성과 가공성이 우수하고, 신축성이 낮아 뒤틀림 이 적은 효과를 가질 뿐만 아니라 항균, 항곰팡이, 단열 및 방습, 보온, 탈취 등 물리적 특성도 매우 우수한 효과를 갖는 것이어서 이를 이용해 구조재를 제조하는 방법을 제공하고자 함을 본 발명의 목적으로 한다.The inventors of the present invention, bamboo is a stable quality of the bamboo porridge (成 竹) in three years not only can be utilized as timber, but also has a very fast growth cycle can be a great help in the conservation of forest resources, namely wood, above all bamboo Bamboo tissue is very dense and tough, so it has excellent abrasion resistance and processability, low elasticity and less distortion, as well as excellent physical properties such as antibacterial, antifungal, heat insulation and moisture proofing, heat retention and deodorization. It is an object of the present invention to provide a method for producing a structural material using the same.

본 발명을 구체적으로 설명하면 다음과 같다. The present invention will be described in detail as follows.

먼저 본 발명은 대나무를 가로와 세로로 절단하고 롤러프레스에 넣어 죽해섬상태로 제조하는 단계와, 상기 죽해섬상태의 대나무를 밀폐된 건류고압장치에 넣고 증기를 주입한 다음 5기압의 압력으로 156~160℃의 온도로 1시간~6시간 가열가압하여 건류시키는 단계와, 상기 건류된 죽해섬상태의 대나무를 형틀에 넣어 종횡으로 적층하는 단계와, 상기 적층된 대나무를 열프레스로 가열가압하여 구조재 형태로 성형하는 단계로 이루어진다.First, the present invention cuts the bamboo horizontally and vertically, and puts it in a roller press to prepare bamboo shoots. The bamboos in bamboo shoots are placed in a closed dry distillation apparatus and injected with steam. 1 hour to 6 hours by heating and pressurizing to dry at a temperature of ~ 160 ℃, and the step of putting the dried bamboo island bamboo in the form of a vertical and horizontal lamination, and heat-pressing the laminated bamboo by heat press Molding takes place.

이때 본 발명은 대나무 칩을 열프레스로 가열가압하기 전 죽해섬상태의 대나무에 접착제를 도포하여 성형하게 된다. 이때 사용되는 접착제는 레졸시놀계 접착제를 사용함이 바람직하다. 그러나 보다 친환경적이고 인체에 바람직한 구조재를 제공하기 위하여 접착제를 사용하지 않고 단순히 대나무만으로 구조재를 성형할 수도 있는데, 이는 대나무의 경우 열을 가할 경우 진득한 진액이 흘러나오는 특성을 이용하는 것으로, 상기 접착성을 갖는 점액질 진액이 접착제를 대신하게 함으로써 본 발명의 구조재의 경우 접착제 없이도 훌륭한 구조재로 성형할 수 있는 것이다.At this time, the present invention is molded by applying an adhesive to bamboo bamboo bamboo before pressing the heat by pressing the bamboo chip with a heat press. In this case, it is preferable to use a resorcinol-based adhesive as the adhesive. However, in order to provide a more environmentally friendly and desirable structural material, it is also possible to simply mold the structural material without using an adhesive, and in the case of bamboo, when the heat is applied, the intrinsic essence flows out. By allowing the mucolytic concentrate to replace the adhesive, the structural material of the present invention can be molded into an excellent structural material without the adhesive.

또 본 발명에서는 대나무를 가로와 세로로 절단하고 롤러프레스에 넣어 죽해섬 상태로 제조하게 되는데, 이때 죽해섬 상태라 함은 대나무가 길이방향으로 잘게 쪼개져 가는 섬유상(纖維狀)과 같은 상태가 되는 것을 의미하며, 이는 대나무의 조직이 와해(瓦解)된 상태가 되어 건류단계에서 불필요한 조직을 제거하는 데 있어 보다 용이하도록 하기 위한 것이다. 상기 불필요한 조직이라 함은 대나무에 함유된 당분이나 수분, 셀룰로오스조직 등을 의미한다.In addition, in the present invention, the bamboo is cut horizontally and vertically and put into a roller press to be prepared in the state of bamboo sea, where the bamboo sea is in the state of being in a fibrous state where bamboo is finely divided in the longitudinal direction. This means that the tissue of the bamboo is in a disintegrated state, so that it is easier to remove unnecessary tissue in the dry step. The unnecessary tissue means sugars, moisture, cellulose, or the like contained in bamboo.

다음 상기 건류단계는 죽해섬 상태의 대나무를 밀폐된 건류고압장치에 넣고 증기를 주입하면서 5기압의 압력으로 156~160℃의 온도로 1시간~6시간 정도 가열가압하는 공정을 의미하는데, 이때 고압과 고온에 의해 대나무 조직 중의 당분이나 수분, 셀룰로오스 등과 같이 대나무의 취약하고 불필요한 조직들이 제거되도록 함으로써 본 발명 구조재로 성형되었을 시 보다 우수한 강도 및 신축성, 가공성 등을 갖게 되는 것이다.Next, the distillation step refers to a process of putting bamboo in a bamboo-sealed state into a closed distillation high pressure device and injecting steam and heating and heating the temperature at a temperature of 156 to 160 ° C. for 1 hour to 6 hours at a pressure of 5 atm. By overheating the fragile and unnecessary tissues of bamboo, such as sugar, moisture, cellulose, etc. in the bamboo tissue is removed to have a superior strength, elasticity, processability and the like when molded into the structural material of the present invention.

또한 대나무에 기생하는 벌레나 곰팡이류의 먹이 자체를 원천 봉쇄하여 본 발명 구조재가 손상되는 것을 방지하도록 한 것이다.In addition, to prevent the damage to the structural material of the present invention by blocking the source of the food itself of bees and fungi parasitic on bamboo.

상기 건류고압장치는 오토크레이프(제2종 압력용기)를 사용하는 것이 바람직하며, 가열온도가 156℃ 이하일 경우에는 대나무 조직 중의 불필요한 조직의 제거가 곤란해지며, 160℃ 이상일 경우에는 탄화가 진행되어 대나무의 고유 물성을 잃게 된다. 따라서 가장 바람직한 온도는 156~160℃이다.The dry distillation high pressure device preferably uses an auto crepe (second type pressure vessel), and when the heating temperature is 156 ° C. or less, it becomes difficult to remove unnecessary tissue in the bamboo tissue, and when it is 160 ° C. or more, carbonization proceeds. Bamboo loses its physical properties. Therefore, most preferable temperature is 156-160 degreeC.

상기 가열시간 역시 1시간 이하일 경우에는 대나무 조직 중 불필요한 조직을 제거함에 있어 너무 짧은 시간이고, 6시간 이상의 경우에는 이미 대나무 조직 중 불필요한 조직이 모두 제거된 상태가 되어 더 이상의 시간은 무의미하다.If the heating time is also less than 1 hour is too short time to remove the unnecessary tissue in the bamboo tissue, if more than 6 hours is already in the state of removing the unnecessary tissue of the bamboo tissue any more time is meaningless.

상기 건류된 죽해섬상태의 대나무를 형틀에 넣어 종횡(縱橫)으로 적층하게 되는데, 이는 죽해섬상태의 대나무가 한방향으로만 적층될 경우 다른 방향으로는 취약성을 갖기 때문이다. 이처럼 적층된 대나무를 열프레스로 가열가압하게 되면 구조재 형태로 성형되어지는 것이다.The dried bamboo bamboo in the dried seaweed state is put into the mold and stacked vertically and horizontally, because bamboo in the bamboo sea state is fragile in the other direction when stacked in only one direction. When the laminated bamboo is heat-pressed by heat press, it is molded into a structural material.

상기와 같이 제조된 본 발명 구조재에 대해 실험을 실시하였으며, 압축실험에 대한 결과는 도 4에, 내화실험에 대한 결과는 도 6, 파괴실험에 대한 결과는 도 8에 나타내었다.Experiments were carried out on the structural material of the present invention prepared as described above, the results for the compression test is shown in FIG. 4, the results for the fire resistance test are shown in FIG. 6, and the results for the fracture test are shown in FIG. 8.

이처럼 본 발명은 압축성, 내화성, 신축성 등이 우수하여 구조재로 사용하더라도 아무런 문제가 없고, 오히려 기존의 목재 구조재보다 압축, 내화, 파괴에 대해 훨씬 우수한 것이다. As such, the present invention is excellent in compressibility, fire resistance, elasticity, and so on, even when used as a structural material, there is no problem, rather, it is much superior to compression, fire resistance, and destruction than conventional wood structural materials.

또한 본 발명 구조재는 대나무를 탄화시켜 죽해섬상태의 대나무를 제조하는 것이 아니어서 대나무의 함유성분 중 살균성질을 갖는 벤죠키논과 초산이 그대로 잔존하게 되고, 이로 인해 구조재 자체가 진드기 및 세균 곰팡이균 등에 대해 항균성질을 가질 뿐만 아니라, 대나무의 다공성에 의해 소취 효과는 물론, 환경에 유해한 포름알데히드를 비롯한 유해화학 물질을 흡착할 수 있는 효과도 갖는 것이다.In addition, the structural material of the present invention is not carbonized bamboo to produce bamboo in the state of bamboo island, so benjokinone and acetic acid, which have bactericidal properties, remain as it is, and thus the structural material itself is a mite and bacterial fungus. In addition to having antimicrobial properties, the porosity of bamboo has a deodorizing effect, as well as the ability to adsorb harmful chemicals, including formaldehyde harmful to the environment.

이때 본 발명에 사용되는 대나무는 어떤 대나무라도 상관없으나, 널리 재배되고 유효성분이 많은 맹종죽(죽순대)을 사용함이 바람직하다. At this time, the bamboo used in the present invention may be any bamboo, but it is preferable to use a wide variety of cultivated myeongjong porridge (juksundae).

이처럼 본 발명은 본 발명이 속하는 분야의 당업자는 첨부된 청구범위에 기재된 본 발명의 사상 및 요지로부터 벗어나지 않고 얼마든지 본 발명에 대한 수정 및 변경을 가할 수 있다는 것은 당연하다고 할 것이다.As such, it will be apparent to those skilled in the art that the present invention may be modified and changed as many as possible without departing from the spirit and the gist of the present invention as set forth in the appended claims.

이처럼 본 발명은 대나무는 3년이면 안정된 품질의 성죽(成竹)이 되어 목재로써 활용이 가능할 뿐만 아니라 대단히 빠른 생육 사이클을 갖는 것이어서 삼림자원, 즉 목재의 보전에도 큰 도움이 될 수 있고, 무엇보다 대나무는 대나무의 세포조직이 매우 치밀하고 강인해서 내마모성과 가공성이 우수하고, 신축성이 낮아 뒤틀림이 적은 효과를 가질 뿐만 아니라 항균, 항곰팡이, 단열 및 방습, 보온, 탈취 등 물리적 특성도 매우 우수한 구조재를 제공할 수 있는 매우 유용한 발명인 것이다.As such, the present invention can be used as wood as a stable quality bamboo porridge (成 竹) in three years as well as having a very fast growth cycle can be a great help in the preservation of forest resources, that is, timber Bamboo is very dense and tough, so it has excellent abrasion resistance and processability, and has low elasticity, so it has less distortion, and also has excellent physical properties such as antibacterial, anti-mildew, insulation and moisture proofing, insulation and deodorization. It is a very useful invention that can be provided.

Claims (1)

대나무를 가로와 세로로 절단하는 단계와, 상기 절단된 대나무를 가열·가압하여 건류시키는 단계와, 상기 건류된 대나무를 형틀에 넣어 종횡으로 적층하는 단계와, 상기 적층된 대나무를 열프레스로 가열·가압하여 구조재 형태로 성형하는 단계로 이루어지는 대나무를 이용한 구조재 제조방법에 있어서,Cutting bamboo horizontally and vertically, heating and pressurizing the cut bamboo to dry it, putting the dried bamboo into a mold and laminating it vertically and horizontally, and heating the laminated bamboo with a heat press. In the structural member manufacturing method using the bamboo comprising the step of pressing to form a structural member, 상기 대나무를 적층하는 단계 이전에 절단된 대나무를 롤러프레스에 넣어 죽해섬 상태로 제조하고, 상기 죽해섬 상태의 대나무를 밀폐된 건류고압장치에 넣고 증기를 주입한 다음 5기압의 압력으로 156~160℃의 온도로 1시간~6시간 가열·가압하여 건류시키는 단계를 더 포함하도록 구성되어짐을 특징으로 하는 대나무를 이용한 구조재 제조방법.Put bamboo cut in the roller press before the step of laminating the bamboo is manufactured in the state of bamboo sea, the bamboo in the bamboo sea state is put into a sealed dry distillation high pressure device, and steam is injected into the pressure of 156 ~ 160 Method for producing a structural material using bamboo, characterized in that it further comprises the step of heating and pressing to dry at 1 ℃ to 6 hours at a temperature of ℃.
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KR970000549A (en) * 1995-06-14 1997-01-21 마사카츠 다나까 Structural building materials using bamboo material and manufacturing method thereof
JP2003155677A (en) * 2001-11-16 2003-05-30 Yasujima:Kk Method for producing bamboo fiber and carbonized bamboo fiber

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Publication number Priority date Publication date Assignee Title
KR970000549A (en) * 1995-06-14 1997-01-21 마사카츠 다나까 Structural building materials using bamboo material and manufacturing method thereof
JP2003155677A (en) * 2001-11-16 2003-05-30 Yasujima:Kk Method for producing bamboo fiber and carbonized bamboo fiber

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