KR100287425B1 - Plate based on chaff and its manufacturing method - Google Patents
Plate based on chaff and its manufacturing method Download PDFInfo
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- KR100287425B1 KR100287425B1 KR1019980053904A KR19980053904A KR100287425B1 KR 100287425 B1 KR100287425 B1 KR 100287425B1 KR 1019980053904 A KR1019980053904 A KR 1019980053904A KR 19980053904 A KR19980053904 A KR 19980053904A KR 100287425 B1 KR100287425 B1 KR 100287425B1
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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
- B27N1/00—Pretreatment of moulding material
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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
- B27N3/002—Manufacture of substantially flat articles, e.g. boards, from particles or fibres characterised by the type of binder
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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
- B27N3/04—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from fibres
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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
- B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
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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
- B27N3/20—Moulding or pressing characterised by using platen-presses
- B27N3/203—Moulding or pressing characterised by using platen-presses with heating or cooling means
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/10—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products
- E04C2/12—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products of solid wood
- E04C2/14—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products of solid wood reinforced
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/10—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products
- E04C2/16—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products of fibres, chips, vegetable stems, or the like
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Manufacturing & Machinery (AREA)
- Forests & Forestry (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
본 발명은 고분자 물질로 코팅 처리한 왕겨 60∼90wt%, 고분자 물질로 코팅처리한 보강섬유 1∼15wt%, 바인더수지 5∼30wt% 및 항균제 0.05∼0.50wt%로 구성된 조성물을 155∼200℃에서 5∼25분간 10∼60kg/cm2의 압력으로 가압성형하여서 된 판재와 그판재를 제조하는 방법에 관한 것이다.The present invention is a composition consisting of 60 ~ 90wt% chaff coated with a polymer material, 1-15wt% reinforcing fiber coated with a polymer material, 5-30wt% binder resin and 0.05 ~ 0.50wt% antibacterial agent at 155 ~ 200 ℃ It relates to a plate member and a method for producing the plate member by press molding at a pressure of 10 to 60 kg / cm 2 for 5 to 25 minutes.
본 발명은 쉽게 구할 수 있는 왕겨를 이용하여 값싼 비용으로 천연목재 수준의 질감, 복원력, 강도를 갖는 판재를 제공할 수 있다는 효과를 갖는다.The present invention has the effect that it is possible to provide a plate having a texture, resilience, strength of natural wood level at a low cost by using a chaff easily available.
Description
본 발명은 왕겨를 주재료로 하는 판재(板材)와 그 판재를 제조하는 방법에 관한 것이다.The present invention relates to a plate containing chaff as a main material and a method of producing the plate.
구체적으로는 고분자 물질의 수성 에멀젼(Emulsion)으로 코팅 처리한 왕겨와 섬유의 혼합물에 바인더수지와 항균제를 첨가하여 구성시킨 판재 제조용 조성물을 가압 성형하여서 된 천연 목판재(木板材) 대체용 판재와 이 판재를 제조하는 방법에 관한 것이다.Specifically, a plate for replacing natural wood boards obtained by press-molding a composition for preparing a board comprising a binder resin and an antimicrobial agent added to a mixture of rice hull and fibers coated with an aqueous emulsion of a polymer material. It relates to a method for producing a plate.
본 발명의 판재는 곡강도가 크고 목재와 같은 질감을 갖으며 못질성, 복원력 등이 우수하다.The plate of the present invention has a high bending strength and a wood-like texture, and is excellent in nailing property and restoring force.
왕겨, 목분, 섬유, 페놀 수지, 불포화 폴리에스텔 수지등을 이용한 판상 제품이나 그의 제조 방법은 이미 많이 알려져 있다.Plate-like products using chaff, wood flour, fibers, phenol resins, unsaturated polyester resins, and the like, and methods for producing the same, are already well known.
왕겨는 화본과 식물종자(禾本科 植物種子)의 외피로서 흔한 합성수지 충진재 중의 하나이지만 목재와 비슷한 조성을 갖고 있으며 약산, 약염기 등에 의해 쉽게 분해되거나 용출되는 리그닌(Lignin)이 20%이상 함유되어 있어 약산, 약염기를 함유한 바인더수지를 사용하여 판재를 제조할 경우 판재의 결합력을 크게 떨어뜨리는 문제가 있다.Chaff is one of the most common synthetic resin fillers, although it is the outer shell of flower seeds and plant seeds, but has a composition similar to wood and contains over 20% of lignin, which is easily decomposed or eluted by weak acid or weak base. When manufacturing a plate using a binder resin containing a problem that greatly reduces the bonding strength of the plate.
왕겨나 목재는 산지나 종류에 따라 차이가 있기는 하지만 대략 다음 표 1과 같은 조성을 나타낸다.Chaff and timber are roughly the same composition as Table 1, although they vary by region and type.
바인더 수지로 사용되는 열경화성 수지 중에서 특히 페놀 수지는 낮은 가격, 우수한 내열성과 치수 안정성, 내약품성, 전기 절연성, 난연성 등이 우수하고 각종 충진재와의 상용성이 비교적 좋으므로 그 이용 영역이 매우 넓다.Among the thermosetting resins used as binder resins, in particular, phenol resins have a low price, excellent heat resistance, dimensional stability, chemical resistance, electrical insulation, flame retardancy, and the like, and their compatibility with various fillers is relatively good.
그러나 페놀 수지의 큰 단점은 수지 제품 중에 자유 페놀 혹은 자유 포름알데하이드가 존재하는 것이다. 페놀 수지는 산 또는 알카리 촉매에 의해서 페놀과 포름알데하이드를 축합 및 중합반응시켜 만드는 수지로 이때 과량으로 사용된 페놀 또는 포름알데하이드가 미반응물로 페놀 수지 속에 잔존하게 된다.However, a major disadvantage of phenolic resins is the presence of free phenol or free formaldehyde in the resin product. Phenolic resin is a resin produced by condensation and polymerization of phenol and formaldehyde by an acid or alkali catalyst, in which excess phenol or formaldehyde remains in the phenol resin as unreacted material.
이러한 페놀 또는 포름알데히드와 같은 작용기들은 왕겨의 성분중 리그닌에 작용하여 리그닌을 용출시키게 되고 이로 인하여 바인더로 사용되는 페놀 수지의 결합력 저감의 원인이 된다. 따라서 페놀 수지, 우레아 포름알데하이드 수지(이하 요소 수지라 한다), 불포화 폴리에스텔수지, 멜라민 포름알데하이드 수지(이하 멜라민 수지라 한다) 등의 열경화성 수지를 왕겨 또는 목분의 바인더로 사용하면 그 결합력이 반감되는 문제점이 있어 이러한 문제점을 극복하기 위하여 여러가지 연구가 시도되었는데 그 예로 왕겨를 저농도의 가성소다 용액에 처리하여 사용하는 방법, 고온 처리하여 리그닌을 제거하고 사용하는 방법이 제안된 바 있다.These functional groups, such as phenol or formaldehyde, act on the lignin in the components of the rice hull to elute the lignin, thereby causing a decrease in the binding strength of the phenol resin used as the binder. Therefore, when a thermosetting resin such as phenol resin, urea formaldehyde resin (hereinafter referred to as urea resin), unsaturated polyester resin, or melamine formaldehyde resin (hereinafter referred to as melamine resin) is used as a chaff or wood powder binder, its binding force is halved. In order to overcome this problem, various studies have been attempted. For example, a method of treating chaff in a low concentration caustic soda solution and a method of removing and using lignin by high temperature treatment have been proposed.
그러나 이러한 방법들은 결합력 증대로 강도 향상에는 어느 정도 효과가 있었으나 왕겨를 전처리하는 비용이 과다하여 실용화하지는 못했다. 따라서 본 발명에서는 지금까지의 선행 기술들에 비해 저렴한 비용으로 리그닌이 용출되지 않도록 왕겨를 전처리함으로서 생산원가를 줄이고 제조된 왕겨보드의 강도를 훨씬 증가시키고자 하는 것이다.However, these methods had some effects on the strength improvement due to the increase of the bonding force, but the cost of pretreatment of the rice hull was excessive, and it was not practical. Therefore, the present invention is to reduce the production cost and to further increase the strength of the chaff board produced by pretreating the chaff so that lignin is not eluted at a lower cost than the prior art up to now.
본 발명의 목적은 왕겨 또는 섬유와의 상용성이 우수한 열경화성 수지를 이용하여 컨테이너 바닥재, 건축용 거푸집, 가구, 내구성 벽체로 사용될 수 있는 고강도 판재와 이 판재를 제조하는 방법을 제공하는데 있다.An object of the present invention is to provide a high-strength plate that can be used as a container flooring, building formwork, furniture, durable walls using a thermosetting resin having excellent compatibility with chaff or fiber and a method of manufacturing the plate.
특히 왕겨 또는 목질계 섬유를 이들과 우수한 상용성을 가진 고분자 물질의 에멀젼(고형분 10∼60wt%)으로 전처리함으로써 표면에 고분자 물질이 고르게 도포(이하 코팅-coating)된 왕겨를 사용하고 이를 페놀수지과 같은 바인더수지를 사용하여 판재를 제조함으로써, 리그닌의 용출을 방지하여 리그닌 용출에 의한 결합강도 저하를 방지하고 보강섬유를 첨가 사용함으로써 천연목재 수준의 곡강도 및 복원력을 가진 판상제품을 제조함으로서 콘테이너 바닥재, 건축용 거푸집 등 높은 곡강도 및 복원력을 요구하는 곳에 사용할 수 있도록 하는 것이다.In particular, pretreatment of chaff or wood fiber with an emulsion of polymer material (solid content of 10 to 60wt%) having excellent compatibility with them, use chaff coated with polymer material evenly on the surface (hereinafter referred to as phenol resin). By manufacturing the plate using binder resin, it prevents the leaching of lignin and prevents the decrease of the bonding strength due to the leaching of lignin and by adding the reinforcing fiber to manufacture the plate products with the bending strength and the restoring power of natural wood level. It is to be used in places requiring high bending strength and resilience, such as formwork.
도1은 본 발명에 따른 복합판재 제조 공정중 원료 혼합 과정을 나타낸 블록 구성도1 is a block diagram showing a raw material mixing process of the composite plate manufacturing process according to the present invention
도2는 본 발명에 따른 복합판재 제조 공정중 성형공정의 실시 예를 도식으로 나타낸 블록 구성도Figure 2 is a block diagram showing an embodiment of a molding process of the composite plate manufacturing process according to the present invention
도3은 본 발명에 따른 복합판재 제조 공정중 성형공정의 또 다른 실시 예를 도식으로 나타낸 블록 구성도Figure 3 is a block diagram showing another embodiment of the molding process of the composite plate manufacturing process according to the present invention
본 발명은 왕겨, 열경화성 수지, 보강 섬유, 고분자 물질의 에멀젼을 기본 조성으로 하고 여기에 항균제, 윤활제를 첨가하여 가압, 성형시켜서 된 고강도 및 고복원력을 갖는 판재와 이 판재를 제조하는 방법에 관한 것으로 이하 본 발명의 구성을 구체적으로 설명한다.The present invention relates to a plate material having a high strength and high resilience by pressurizing and molding an emulsion of chaff, thermosetting resin, reinforcing fiber and polymer material, and adding an antibacterial agent and a lubricant thereto, and a method of manufacturing the plate. Hereinafter, the configuration of the present invention will be described in detail.
왕겨와 보강섬유를 혼합한 혼합물을 아크릴 수지가 물에 분산시켜서 된 수지함량 10~60wt%인 아크릴에멀젼으로 코팅한 다음, 바인더인 열경화성 수지와 첨가제(항균제, 윤활제 등)를 혼합하여 열간 프레스의 금형틀에 채우고 프레스로 가압과 해압을 반복하며 판재를 제조한다.The mixture of the chaff and the reinforcing fiber is coated with an acrylic emulsion having a resin content of 10 to 60wt%, in which the acrylic resin is dispersed in water, and then mixed with a binder thermosetting resin and an additive (antimicrobial agent, lubricant, etc.) to form a hot press. Fill the mold and press and depress with a press to produce a sheet.
이때 각 조성의 구성비는 왕겨 60~90wt%, 보강섬유 1~15wt%, 수성아크릴계 수지에멀젼 5~15wt%(고형분 기준), 열경화성 바인더 수지 5~30wt%, 제올라이트계 항균제 0.05~0.5wt%이며 필요에 따라 왁스등을 윤활제로 소량 첨가 사용할 수 있다.The composition of each composition is 60 ~ 90wt% chaff, 1 ~ 15wt% reinforcing fiber, 5 ~ 15wt% aqueous acrylic resin emulsion (based on solid content), 5 ~ 30wt% thermosetting binder resin, 0.05 ~ 0.5wt% zeolite antibacterial agent. As a result, a small amount of wax or the like may be added as a lubricant.
왕겨는 판재 조성의 60∼90wt% 정도 사용되는데 그 입자의 크기는 왕겨 입자 그대로 사용하거나 30∼1000㎛ 정도로 분쇄하여 사용 가능하며 이 때 왕겨의 수분 함량이 15wt% 이하가 되도록 건조 유지하고 흙, 오물등 이물질의 미분말을 제거하여 사용하는 것이 좋다. 이러한 이유는 이와같은 이물질의 미분말이나 수분함량의 과다는 판재성형시 경화시간을 지연시킬 우려가 있기 때문이다.The rice husk is used 60 ~ 90wt% of the plate composition. The size of the rice husk can be used as it is, or it can be crushed to 30 ~ 1000㎛. At this time, keep the chaff to be 15wt% or less and keep it dry. It is good to remove and use fine powder of foreign substances. This is because such fine powder or excessive moisture content may delay the curing time during sheet forming.
보강 섬유는 유기섬유, 무기섬유로서 1∼15wt% 정도 사용되며 섬유굵기는 0.5∼30㎛인 가는 섬유나 다발형태로 길이는 5∼45㎜인 섬유를 사용한다. 무기섬유로는 석면, 금속섬유, 세라믹섬유, 탄소섬유 등이며, 유기섬유로서는 폴리프로필렌 섬유, 폴리에스터 섬유, 폴리에틸렌 섬유, 의류 등의 폐섬유, 볏짚 옥수수 껍질 등의 식물성 섬유, 마직류 모직류 등의 두께가 가는 섬유나 다발 형태의 섬유를 모두 보강섬유로 사용될 수있다.Reinforcing fibers are used as organic fibers and inorganic fibers in the range of 1 to 15wt%, and the fiber thickness is 0.5 ~ 30㎛ fine fibers or bundles of 5 ~ 45mm in length. As inorganic fibers, asbestos, metal fibers, ceramic fibers, carbon fibers, etc., organic fibers include polypropylene fibers, polyester fibers, polyethylene fibers, waste fibers such as garments, vegetable fibers such as rice straw corn husk, hemp wool, etc. Both thin fibers and bundle-shaped fibers can be used as reinforcing fibers.
이와같이 준비된 왕겨 및 보강섬유는 고형분 10∼60wt%인 상기한 수성아크릴수지 에멀젼(emulsion : 수지가 물에 고르게 분산되어 있는 상태)과 함께 혼합조에서 혼합하여 코팅하는 전처리 단계를 거친다. 이와같이 코팅제(전처리제)로 사용되는 아크릴계 수지는 판재 조성에 있어 3∼15wt% 사용한다. 상기한 바와 같이 왕겨 또는 보강섬유에 대하여 아크릴계 수지를 이용하여 코팅하는 이유는 판재 제조시 이용되는 바인더수지(열경화성 수지)에 함유된 산 또는 염기가 왕겨 또는 보강섬유중 천연 식물성 섬유에 존재하는 리그닌에 작용하여 리그닌을 용출시킴으로서 바인더수지의 결합력을 약화시키는 원인이 되기 때문에 왕겨나 보강섬유에 대해 아크릴계 수지로 전처리 코팅함으로서 이러한 문제점을 해결코자 한 것이다. 여기에서 사용되는 아크릴계 수분산성 수지로서 폴리아크릴레이트, 아크릴 아마이드, 아크릴 아마이드 염 그리고 이와 유사한 고분자 물질로서는 라텍스(Latex)나 전분 또는 폴리비닐알콜의 수용액을 사용할 수도 있다.The chaff and reinforcing fibers thus prepared are subjected to a pretreatment step of mixing and coating in a mixing tank together with the above-mentioned aqueous acrylic resin emulsion (emulsion: resin is evenly dispersed in water) having a solid content of 10 to 60 wt%. As such, the acrylic resin used as the coating agent (pretreatment agent) is used in the sheet composition of 3 to 15wt%. The reason for coating the chaff or the reinforcing fibers using acrylic resin as described above is that the acid or base contained in the binder resin (thermosetting resin) used in the manufacture of the sheet is present in the lignin present in the natural vegetable fiber in the chaff or the reinforcing fibers. It is intended to solve this problem by pretreatment coating with chaff or reinforcing fibers with acrylic resin because it acts to cause lignin to elute the binding force of the binder resin. As the acrylic water-dispersible resin used herein, polyacrylate, acrylamide, acrylamide salt, and the like may be used as an aqueous solution of latex, starch or polyvinyl alcohol.
바인더수지로 사용되는 열경화성 수지는 5~30wt%가 사용되며, 거의 모든 열경화성 수지가 사용가능하나, 특히 페놀 수지, 불포화 폴리에스테르수지, 요소수지, 멜라민수지가 효과적이며 수분산성 수지보다 분체 또는 괴상의 노볼락 수지가 더 유리하다. 그 이유는 가압가열 프레스 성형시 수분산성 수지는 수분에 의해 경화시간을 지연시킬 수 있기 때문이다.Thermosetting resin used as binder resin is 5 ~ 30wt%, almost all thermosetting resins can be used, but especially phenol resin, unsaturated polyester resin, urea resin, melamine resin is more effective than powder dispersing resin Novolak resins are more advantageous. This is because the water-dispersible resin can delay the curing time by moisture during pressurized heating press molding.
기타 첨가제는 제품에 특별한 기능을 부여하기 위하여 사용되며, 본 발명에서는 항균성을 부여하기 위하여 항균제로서 제올라이트를 0.05∼0.50wt% 사용하였다.Other additives are used to impart a special function to the product, in the present invention was used 0.05 ~ 0.50wt% zeolite as an antimicrobial agent to impart antimicrobial properties.
또한 압출성형시 성형 및 압출성을 좋게 하기 위해서 윤활제로서 소량의 왁스를 사용할 수도 있다.In addition, a small amount of wax may be used as a lubricant to improve molding and extrudability during extrusion.
상기한 바와 같은 조성을 이용하여 판재를 제조하는 방법을 성형용 원료의 혼합 공정과 제품의 성형 공정으로 두 가지로 크게 나누어 설명하고자 한다.The method of manufacturing a plate using the composition as described above will be broadly divided into two types, a mixing process of molding raw materials and a molding process of products.
본 발명에서 주요 발명내용으로는 원료 특히 왕겨와 보강섬유의 혼합과 이 혼합물을 이용하여 고분자 물질의 수성에멀젼으로 표면을 고르게 코팅하는 전처리 공정을 통하여 다음 공정인 제품성형 공정에서 바인더수지와의 혼합 성형공정은 바인더수지의 작용에 의한 왕겨 성분중 하나인 리그닌이 용출되어 나오는 현상을 사전에 방지하기 위한 원료혼합 공정이다In the present invention, the main contents of the present invention are the mixing of raw materials, especially chaff and reinforcing fibers and mixing molding with binder resin in the next step of product forming process through a pretreatment process of evenly coating the surface with an aqueous emulsion of a polymer material using the mixture. The process is a raw material mixing process to prevent the leaching of lignin, which is one of the components of the rice husk caused by the action of the binder resin, in advance
이 원료의 혼합공정은 가열기와 냉각기가 부착되어 가열 및 냉각이 신속하게 이루어지며 회전하는 날개를 가진 혼합기에서 왕겨와 보강섬유를 먼저 혼합하고, 왕겨와 보강섬유를 코팅할 수분산성 수지에멀젼을 투입하여 다시 혼합하여 왕겨 및 보강섬유의 표면에 수분산성 수지가 고르게 코팅되게 한 다음 시료를 90℃까지 가열하여 코팅재에 함유된 수분을 증발시켜서 건조하고 80℃ 이하로 냉각한 후 결합 바인더 및 첨가제를 투입하여 혼합 시료를 제조한다.The mixing process of this raw material is quick heating and cooling with the heater and cooler attached. In the mixer with the rotating blades, the chaff and the reinforcing fiber are mixed first, and the water-dispersible resin emulsion to coat the chaff and the reinforcing fiber is added. After mixing again, the water-dispersible resin is evenly coated on the surface of the rice hull and reinforcing fiber, and then the sample is heated to 90 ° C to evaporate the moisture contained in the coating material, dried to cool below 80 ° C, and then the binder and additives are added. Prepare mixed samples.
결합 바인더로서 노블락형 수지를 사용함이 적당하다. 그 이유로는 노볼락 형태의 수지를 사용할 때는 수분의 증발이 필요없지만 수분산성 수지(레졸형)를 사용할 때는 수분을 반드시 증발시켜야 하기 때문이다. 또한 결합 바인더를 혼합할 때 온도를 낮추어야 하는 이유는 노볼락형 수지인 결합 바인더가 수분과 온도에 의해 전경화(Pre-cure)가 일어나 수지의 특성을 상실하는 원인이 되기 때문이다.It is suitable to use a noblock type resin as the binding binder. The reason for this is that evaporation of water is not necessary when using a novolak-type resin, but water must be evaporated when a water-dispersible resin (resol type) is used. In addition, the reason for lowering the temperature when mixing the binder binder is that the binder binder, which is a novolak-type resin, becomes pre-cure due to moisture and temperature, causing loss of the properties of the resin.
이렇게 만들어진 시료를 이용하여 프레스법에 의한 복합판재 성형방법에 관한 것으로 적당한 형태로 암수가 분리되는 열간프레스 금형에 투입하고, 155∼200℃의 열간 프레스로 5∼25분간, 10∼60㎏/㎠의 압력으로 가열 및 가압 성형하되 약 3분 간격으로 가압과 해압을 반복하여 성형토록 한다. 이러한 성형과정에서 가압과 해압을 반복하는 이유는 성형중 발생되는 수분 또는 성형 가스에 의한 복합판재의 성형 불량을 줄일 수 있을 뿐 아니라 내부층과 표면층의 밀도 차이를 없애기 위함이다.A method for forming a composite plate by a press method using a sample thus prepared is put into a hot press mold in which a male and female are separated in a suitable form, and is 10 to 60 kg / cm 2 for 5 to 25 minutes using a hot press at 155 to 200 ° C. Heat and pressurize with a pressure of, but repeat the pressurization and depressurization at intervals of about 3 minutes. The reason for repeating the pressurization and the depressurization in the molding process is to not only reduce the molding defect of the composite plate due to moisture or molding gas generated during molding, but also to eliminate the density difference between the inner layer and the surface layer.
또 다른 판재 성형공정은 판상, 중공 형태 또는 띠형의 금형(이하 금형)이 부착된 압출기 또는 사출기에서 저온 고압으로 성형하는 방법이다.Another sheet forming process is a method of molding at low temperature and high pressure in an extruder or an injection machine to which a plate, hollow or band-shaped mold (hereinafter referred to as a mold) is attached.
이 때 압출기의 실린더 및 스크류(이하 실린더)는 성형 가스 배출 및 진공 흡입이 가능한 구멍이 있는 설비로 온도는 120∼170℃를 유지하고 금형의 온도는 155∼230℃로 한다. 이때 복합판재 강도 증진을 위해 왕겨를 10∼3000㎛로 분쇄하여 사용하면 우수한 표면과 물성을 얻을 수 있다.At this time, the cylinder of the extruder and the screw (hereinafter referred to as the cylinder) are equipped with a hole for molding gas discharge and vacuum suction. The temperature is maintained at 120 to 170 ° C and the mold temperature is 155 to 230 ° C. In this case, when the chaff is ground to 10 to 3000㎛ in order to increase the strength of the composite plate, excellent surface and physical properties can be obtained.
이상과 같이 강도가 우수한 판재를 생산하기 위한 조성 및 제조방법을 실시예를 통하여 상세히 설명하면 다음과 같다.The composition and the manufacturing method for producing a plate having excellent strength as described above will be described in detail by way of examples.
실시예 1Example 1
본 발명에서 충진재로 왕겨를 사용하는 경우와 목분 또는 목모를 사용하는 경우 어떤 차이가 있는지를 알아보기 위하여 하기와 같은 조성으로 동일한 혼합공정과 제조방법(열간프레스)으로 판재를 제조하였다.In the present invention, in order to determine the difference between using chaff as a filling material and using wood flour or wool, a plate was manufactured by the same mixing process and manufacturing method (hot press) with the following composition.
혼합기에서 아래 표 2의 조성으로 혼합한 후 130×110㎜ 금속제 금형에서 170℃에서 약 10분간 열간 프레스 성형한 시편의 물성을 측정한 결과 아래 〈표2〉와 같이 분쇄왕겨 대신 목분이나 목모를 대체하여 사용하더라도 물성에는 큰 차이가 없음을 확인할 수 있었다.After mixing with the composition shown in Table 2 below, the physical properties of the specimens which were hot press-molded for about 10 minutes at 170 ° C. in a 130 × 110 mm metal mold were measured and replaced with wood flour or wool instead of crushed rice hulls as shown in Table 2 below. Even when used, there was no significant difference in physical properties.
실시예 2Example 2
왕겨의 전처리 과정(수성아크릴계 수분산성 수지에멀젼으로 코팅하는 과정)이 물성에 얼마나 큰 영향을 미치는지를 살펴보기 위해 실시한 비교실험예로서 실시예 1과 동일한 제조방법으로 시편을 제조하되 왕겨를 아크릴계 수분산성 수지로 전처리(코팅)하여 적용한 결과를 표 3에 나타내었다.Comparative experiments were conducted to see how the pre-treatment process of chaff (coating with an aqueous acrylic water-dispersible resin emulsion) affected physical properties. Table 3 shows the results of application by pretreatment (coating) with resin.
실시예3Example 3
왕겨에 보강섬유를 첨가하여 혼합하고 전처리 과정(아크릴계 수분산성 수지로 코팅하는 과정)을 실시하여 복합판재를 제조할 때 물성에 얼마나 큰 영향을 미치는지를 살펴보기 위하여 실시한 실험예로서 실시예 1, 2와 동일한 제조방법으로 시편을 제조하되 왕겨와 보강섬유를 아크릴계 수분산성 수지로 전처리(코팅)하여 적용한 결과를 표 4에 나타내었다.Experimental Example 1, 2 as an experimental example was carried out to see how much influence on the physical properties when manufacturing the composite plate by adding the reinforcing fiber to the chaff and mixing and performing a pretreatment process (coating with acrylic water-dispersible resin) The specimens were prepared by the same method as described above, but the results of applying the chaff and the reinforcing fibers to the pretreatment (coating) with an acrylic water-dispersible resin are shown in Table 4.
이때 보강섬유는 섬유경 9∼15㎛ 폴리에스터를 35mm의 길이로 절단하여 사용 하였다.At this time, the reinforcing fiber was used to cut the fiber diameter 9 ~ 15㎛ polyester to a length of 35mm.
대부분이 소각 및 방치되고 있는 우리 주위의 가장 흔한 부산물인 왕겨를 이용하여 천연 목재 수준의 질감, 복원력, 강도를 가진 대체품을 개발하기 위하여 많은 연구자들이 연구하여 요구 물성에는 많은 접근을 하였으나 물성향상을 위한 접근방법이 너무 복잡하거나 많은 비용이 소요되어 실적용하기엔 어려움이 많았다.Many researchers have studied and approached the required properties to develop substitutes with the texture, resilience, and strength of natural wood using chaff, the most common by-product around us, which is mostly incinerated and left unattended. The approach was too complex or too expensive for the performance.
이러한 전저리 공정 및 비용을 획기적으로 절감할 수 있는 방법이 본 발명에서 제시함으로서 생산단가의 절감에 기여하게 되었다.Since the present invention provides a method for drastically reducing such pretreatment processes and costs, it contributes to the reduction of production cost.
첫째, 수분산성 수지를 이용하여 왕겨 및 보강섬유를 전처리(코팅처리)함으로서 왕겨 성분중 리그닌 용출을 방지하여 왕겨와의 수지흡착을 억제하므로서 복합판재의 강도를 증진시키고, 제품의 유연성 및 못질성을 향상시킴으로서 고강도를 요구하는 콘테이너 바닥재에도 적용 가능할 수 있도록 용도를 확대 하였다.First, by pretreatment (coating) the chaff and reinforcing fibers using water-dispersible resins to prevent the leaching of lignin in the rice husk components to inhibit the adsorption of the resin with the chaff, thereby improving the strength of the composite plate material and the flexibility and nail quality As a result, the application has been expanded to be applicable to container flooring requiring high strength.
둘째, 수분산성 수지 코팅으로 보강 섬유와의 상용성을 향상시켜 결합력을 증가하고, 제품의 발수성이 향상되며, 가닥별로 코팅된 섬유가 고르게 분산되도록 하여 성형품의 복원력을 합판 수준 이상으로 향상 시켰다.Second, the water-dispersible resin coating improves the compatibility with the reinforcing fibers to increase the bonding strength, improve the water repellency of the product, and evenly distributed fibers coated by strands to improve the resilience of the molded product above the plywood level.
셋째, 수분산성 수지로 코팅된 왕겨는 제품 성형시 금속면과의 마찰을 줄이는 윤활작용을 하여 제품성형을 용이하게 하고, 왕겨의 분해가 없기 때문에 왕겨의 내부에 잔존하는 수분의 증발을 억제토록하여 제품 성형시 가스의 발생을 적게 한다.Third, the rice husk coated with water dispersible resin facilitates product shaping by reducing friction with metal surface during product shaping, and suppresses the evaporation of water remaining inside the rice husk because there is no decomposition of rice husk. Reduces gas generation when forming products.
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|---|---|
| KR (1) | KR100287425B1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100710618B1 (en) * | 2005-08-11 | 2007-04-24 | 전북대학교산학협력단 | The composite materials using chaff and the manufacturing method thereby |
| WO2010104286A2 (en) * | 2009-03-11 | 2010-09-16 | Jo Sung Kyun | Method for manufacturing a rice hull board, and rice hull board manufactured by same |
| KR101105149B1 (en) * | 2009-02-27 | 2012-01-17 | 충남대학교산학협력단 | Wood fiber and natural fiber reinforced wood plastic composite and Manufacturing method thereof |
| KR101108918B1 (en) | 2009-03-11 | 2012-02-29 | 조성균 | Manufacturing methods of rice hull board and the rice hull board thereof |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030022426A (en) * | 2001-08-08 | 2003-03-17 | 이주영 | Manufacturing methods of a artificial-light-panel composed waste-kraft-papers and PP-gunny Bags |
| KR100479571B1 (en) * | 2002-05-29 | 2005-04-06 | 현대산업개발 주식회사 | A Floor Board And The Method For Protection Of Germ |
| KR100491251B1 (en) * | 2002-05-29 | 2005-05-25 | 현대산업개발 주식회사 | A Floor Board And The Method For Protection Of Germ |
| KR100912402B1 (en) * | 2008-01-17 | 2009-08-14 | (주) 그린이엔지 | Board used in construction |
| KR100964570B1 (en) * | 2009-08-31 | 2010-06-21 | 경광산업(주) | Eco-friendly artificial wood and its manufacturing method |
| KR101160658B1 (en) * | 2009-12-28 | 2012-06-28 | 석동원 | Manufacturing method of noninflammable board and noninflammable board manufactured thereby |
-
1998
- 1998-12-09 KR KR1019980053904A patent/KR100287425B1/en not_active IP Right Cessation
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100710618B1 (en) * | 2005-08-11 | 2007-04-24 | 전북대학교산학협력단 | The composite materials using chaff and the manufacturing method thereby |
| KR101105149B1 (en) * | 2009-02-27 | 2012-01-17 | 충남대학교산학협력단 | Wood fiber and natural fiber reinforced wood plastic composite and Manufacturing method thereof |
| WO2010104286A2 (en) * | 2009-03-11 | 2010-09-16 | Jo Sung Kyun | Method for manufacturing a rice hull board, and rice hull board manufactured by same |
| WO2010104286A3 (en) * | 2009-03-11 | 2010-12-09 | Jo Sung Kyun | Method for manufacturing a rice hull board, and rice hull board manufactured by same |
| KR101108918B1 (en) | 2009-03-11 | 2012-02-29 | 조성균 | Manufacturing methods of rice hull board and the rice hull board thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20000038792A (en) | 2000-07-05 |
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