Particleboard (article board) , also known as particle board , bagasse board, scrap wood or other lignocellulosic material, after application of the adhesive under heat and pressure in a synthetic glue plywood . Also known as particle board . Mainly used for furniture and construction industries and train, automobile car manufacturing .

Particleboard ( another " wood particle board" and other titles ) is cutting wood and other raw materials into a certain size pieces , dried , mixed with adhesives, curing agents , waterproofing agents, at a certain temperature and repression into an artificial plate. Because relatively uniform particle board structure , processing performance, large format can be machined into the plate , is the production of different specifications , style furniture better raw materials. Manufactures particleboard not require drying again , can be used directly , sound absorption and sound insulation performance is also very good. But it also has its inherent drawbacks, because the edge of the rough , easy to absorb moisture, so use furniture made of particleboard edge technology is especially important . Also due to the large volume of particleboard , with its production of furniture , relative to other plates , it is relatively heavy . Particleboard Classification : According to zoning : A class of particleboard ; class B according particleboard particleboard structure: single- strand board ; triple strand board ; gradual structural particleboard ; OSB ; waferboard ; molded particleboard . The method of manufacturing of : Horizontal particleboard ; squeeze particleboard . Particleboard
divided by raw material used : wood particleboard ; bagasse particleboard ; flax crumbs particleboard ; cotton stalk particleboard ; bamboo particleboard ; cement particle board ; gypsum particleboard . According to sub- surface conditions : 1 , not particleboard finishes : Satin particleboard ; Not sanding particleboard . 2 , veneer particleboard : impregnated paper finishes particleboard ; decorative laminate finishes particleboard ; veneer finishes particleboard ; surface coating particleboard ; PVC finishes such as particleboard . Edit this paragraph
kind and nature
by product of low-density particleboard ( 0.25 to 0.45 g / cm 3 ) , medium density ( 0.55 to 0.70 g / cm 3 ) , high density ( 0.75 to 1.3 g / cm 3 ) 3 kinds , but more generally the production of 0.65 to 0.75 g / cm 3 density particleboard . By slab structure of single , three ( including multiple ) , graded three kinds of structures. Press the water resistance of indoor and outdoor water water class category . By wood shavings in the arrangement of the slab has directed and stochastic two . In addition, non-wood materials such as cotton stalk , stalk , bagasse , rice husks , etc. made ​​of a variety of particle board and wood wool cement board with inorganic adhesive material, such as cement particle board . Particleboard specification more in thickness from 1.6 mm to 75 mm range, with 19 mm standard thickness. In assessing the quality of particleboard , often considered are the physical properties of density , moisture content , water absorption , thickness swelling , etc., and mechanical properties have static bending strength , tensile strength perpendicular to the plate surface (within bond strength ) , elastic nail holding power modulus and modulus of rigidity , etc., there may be the nature of the cutting process , can gluing , paint finishing and so on. Particleboard for special purposes should be considered separately by the different uses of electrical , acoustical , thermal and corrosion , fire retardant properties.
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particleboard production technology of their production methods slab forming and pressing process equipment , divided into intermittent production of flat -pressure and continuous production of extrusion , rolling method. The actual production level pressure method to use based.
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this paragraph include the production of particleboard wood or wood fiber materials, adhesives and additives into two categories, the former accounting for more than 90% of the dry weight of the sheet . More from the wood raw material forest thinning materials , small diameter timber ( usually 8 cm or less in diameter ) , logging and wood processing residues and other residues . Processed into sheet, strip , needle-like , grainy wood chips , wood shavings , wood fiber , sawdust , etc., known as scrap. In addition, non-wood materials such as plant stems , seed husks can also be made ​​of sheet metal , which is often dubbed the materials used naming names , such as Magan ( shavings ) board , bagasse ( shavings ) panels. Multi- urea-formaldehyde resin adhesive glue and phenolic resin glue . The former fat pale, low curing temperature , a variety of plant materials such as straw, rice husks , etc. have a good gluing effect particleboard pressing temperature of 195 ~ 210 ℃. Widely used in the production , but there are shortcomings release formaldehyde pollution of the environment . Particle morphology is a decisive factor in the quality of particleboard , so we must first create a qualified shavings. Shavings of wood processing residues can be used by reprocessing particleboard core . Surface particles mainly specialized processing system to take with harvesting or processing of Advanced residue ( wood truncated , board edges , etc. ) . Shavings of long , thick, wide sizes due to the production method used to produce the core or surface and the like, however . Preparation shavings processing equipment chipper, and then broken machines, grinding machines and fiber separators, cutting methods are cutting , cutting and crushing . In order to obtain high-quality wood shavings , to go through the early pieces , grinding, crushing and sieving process again . Was processed into wood shavings , the initial moisture content of approximately 40 to 60 percent , in line with the technological requirements of the moisture content of 2 to 4% of the core layer , the surface of 5 to 9 percent . Therefore , use the dryer on the initial moisture content ranging from dried wood shavings , so as to achieve a uniform final moisture content . Then the dried wood shavings mixed with liquid glue and additives . Usually on a per square meter of surface area shavings , glue 8 to 12 grams. After the plastic material from the nozzle to become 8 to 35 micron diameter particles , the particle surface to form a thin continuous and homogeneous layer . After particle sizing then paved slab , the thickness is generally 10 to 20 times the thickness of the finished product . And hot pressing can be carried out pre- processing . Preloading pressure of 0.2 to 2 MPa , for a flat plate press or a roll press.
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pressing a key step is to make the role of curing rubber slab and loose slab to form a solid sheet after pressing a predetermined thickness . Its process requirements as follows: ① proper moisture content . When the surface is conducive to a water content of 18 to 20% of the flexural strength , tensile strength and improved surface finish reducing the slab may be layered relief bubbler . The core layer is lower than the surface moisture content should be appropriate to maintain the proper plane tensile strength. ② proper hot pressure. Pressure can affect the degree of rubber shavings transfer between the contact area , plate thickness deviation and shavings . In accordance with the requirements of different density products , hot pressure is generally 1.2 to 1.4 MPa. ③ proper temperature. Temperature will not only break down urea-formaldehyde resins , can also cause a partial advance when the slab temperature curing produce waste. ④ proper pressurization time . Time is too short, the resin is not sufficiently cured middle finished elastic recovery in the thickness direction increased tensile strength significantly lower plane . Particleboard after hot humidity should be handled by a period it reached equilibrium moisture content , and then saw cut sanding , testing packaging. But not heat, relieving state stack , otherwise it will increase the plate brittle . Molding technology means that the formation of a single operation technology products . There are three kinds of mature technology . You can use less hot molding of rubber or plastic materials do not rely on the role of lignin -activated glue flowing into the sky in a closed hot mold , but to be cooled mold , heat consumption, low productivity , have been gradually phased out. Cabinet press molding method is to use a special pressurized pressurized once made ​​products for the manufacture of crates . Thermoforming method is mainly manufacturing furniture parts, accessories and interior decoration products such as pallets , urea -formaldehyde resin based adhesive , re-posted with the product surface veneer or resin impregnated paper , a molding. In addition, there have been made ​​on the surface of particle board or slab without template hot pressing molding , compression molding to form a relief pattern in a plane like.
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A, with good sound absorption and sound insulation ; particleboard insulation, sound absorption B, internal crossover scattered granular structure , performance is basically the same direction ministries , good lateral loading capacity C, particleboard surface smooth , lifelike texture , bulk density uniformity , thickness error is small , anti- pollution, anti-aging , beauty , can be a variety of veneer ; D, particleboard in the production process , with a small amount of glue , environmental factor is relatively high. Disadvantages : A, internal granular structure , not easy to mill type ; B, when the Conference Board is likely to cause the phenomenon of violence teeth , so part of the process of processing equipment demanding ; should live production .
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China 's industrial development in this paragraph particleboard production experienced a rise in the 1980s , and the decline in the 1990s and then rose again in 2000 by the repeated process. Due to the poor quality of particleboard and other reasons, after being abandoned by the market , many companies learn from particleboard , the introduction of foreign advanced production lines and improve the technological level , the Chinese particleboard quality has been significantly improved in recent years , again to be accepted by the market , many furniture manufacturers particleboard
again chosen as raw particleboard Moreover , OSB is gradually being accepted by consumers , and therefore , in recent years , China 's particleboard demand is increasing year by year . With domestic demand growing for particleboard and plywood industry, the state has adopted preferential policies to encourage development and create excellent conditions for the development of particleboard industry. January to December 2006 , China particleboard manufacturing enterprises above designated size realized total industrial output value of 7,072,059 yuan, an increase of 26.10% over the previous year ; achieve total sales revenue 6,666,291 thousand, an increase of 24.80% over the previous year ; achieve cumulative total profit of 136,464 thousand over the previous year fell by 25.30% . 2007 January to November , China particleboard manufacturing enterprises above designated size realized total industrial output value of 9,643,562 yuan, an increase of 58.17% over the previous year ; achieve total sales revenue 8,937,280 thousand, an increase of 59.41% over the previous year ; achieve cumulative total profit of 409,659 yuan, an increase over the previous year of 225.92% . Chinese particleboard industry developed rapidly, but the prevalence of small -scale , outdated equipment and technology issues , with many companies do not pay attention to product quality, bark and MDF dust and so is used to produce the raw particleboard , therefore, Chinese production of particleboard generally of poor quality , but also the serious problem of excessive formaldehyde prevalent . In this situation, the particleboard industry must rapidly improve product quality and reduce costs, and actively participate in market competition, product market space is huge. In addition to ensuring the supply of raw materials and improve product quality , the enterprises should increase scientific and technological innovation, to recycle waste wood to achieve circular economy. Efforts to develop new uses for particleboard , OSB in particular to increase the research and the use of particleboard propaganda , in order to improve the quality of particleboard and reduce costs and improve R & D capability , we must increase the scale of construction projects , the restructuring of small particleboard plant , reflecting economies of scale. Currently China's per capita consumption of particleboard level is still relatively low , but with the pace of China building a moderately prosperous society progresses, the demand for wood-based panel products continues to increase. Beijing Olympics invest 280 billion yuan , the Shanghai World stroke will be more than 250 billion yuan of direct investment , coupled with the "Eleventh Five-Year" period of Chinese urban public facilities over one trillion yuan in fixed assets investment , which gave the Chinese bring development opportunities particleboard industry . Therefore , China is expected particleboard consumption will increase every year recently .

Seek abundant resources , inexpensive adhesive is an important factor in the development of particleboard production , so the effective use of forest resources and waste paper pulp has been more and more attention . Tannin -formaldehyde glue and sulfite pulp waste plastic has been successful as adhesives , cement, gypsum, etc. are made ​​of inorganic adhesive has been applied ; rather attractive new technology is no glue , it appears make particleboard industries undergo fundamental change . As particleboard itself , due to the orientation of structure in terms of mechanical properties significantly better than random structure, can be used instead of plywood and even some sawing lumber, so the great development prospects. Particleboard surface decoration process will also be more new materials and new technology, and it is possible through the many varieties of multi-functional specialization prefabricated decorative materials to form an independent emerging industry categories .