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इंटरनेट मानक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. “जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न’ 5 तरफ” Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru “The Right to Information, The Right to Live” “Step Out From the Old to the New” IS 12406 (2003): Medium Density Fibre Boards for General Purpose -Specification [CED 20: Wood and other Lignocellulosic products] “!ान $ एक न’ भारत का +नम-ण” Satyanarayan Gangaram Pitroda ““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee”” “!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै” Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” IS 12406 : 2003 Reaffirmed 2008 ~~~~~~~ tm~-~ ~erur ) ( Indian Standard MEDIUM DENSITY FIBRE BOARDS FOR GENERAL PURPOSE — SPECIFICATION ( First Revision) ICS 79.060.20 © BIS 2003 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 February 2003 Price Group 5 AMENDMENT NO. 1 SEPTEMBER 2006 TO IS 12406 : 2003 MEDIUM DENSITY FIBREBOARDS FOR GENERAL PURPOSES - SPECIFICATION ( FtrstRevision) (Page 4, clause 12, Tit/e) - Substitute 'ADDITIONAL' for 'OPTIONAL'. (CED20) ReprographyUnit,BIS,NewDelhr,India AMENDMENTNO.2 JANUARY 2007 TO IS 12406 : 2003 MEDIUMDENSITY FIBRE BOARDS FORGENERAL PURPOSE - SPECIFICAnON (FIntRevl6lo") (Page 2, clause 8.1) - Substitute 'MDFboard'for 'plywood' wherever appearinginthe clause. (CED20) Ropro....phyUnit,BIS.NowDeIbi,lDdia Wood ProductsSectional Committee,CEO20 FOREWORD This Indian Standard (First Revision) was adopted by the BureauofIndian Standards, after the draft finalized by theWood Products Sectional Committeehadbeen approved by the CivilEngineeringDivisionCouncil. Mediumdensityfibre boardisapanelproductmanufacturedfrom lignocellulosicfibrescombinedwith synthetic resin or othersuitablebinder. Thepanelsare manufacturedto a specificgravityof0.6 to 0.9 by the application ofheat and pressureby aprocessinwhichthe interfibrebondissubstantiallycreatedbythe addedbinder.Other materials may have been added during manufacturing to improve certain properties. This standardwasfirst publishedin 1988. Thisrevisionisbeingbroughtoutto incorporatemodificationsfound necessary in the present day context. Further, detailed requirements for physical and mechanical properties have been given for various thickness ofboards. Medium density fibre boards are recommended for use in interior dry locations. Grade I boards may be used in Hazard Class 11) and Hazard Class 22), whereas Grade II boards may be used in HazardClass II)only. Informulationofthisstandard,due weightage has beengiven to standardsandpracticesprevailing indifferent countries and also to the climatic conditions and customs inthe country. In this revision properties have been incorporated to facilitate the properapplication ofproduct, properties likemodulus ofelasticityand the values indicating minimum and average have been included. A scheme oflabelling environment friendly products to be known as ECO-Mark has been introduced at the instance ofthe Ministry ofEnvironment and Forests (MEF), Government ofIndia. The ECO-Mark shall be administered by the Bureau of Indian Standards (BIS) under the BIS Act, 1986 as per the Resolution No. 71 dated 21 February 1991 and Resolution No. 425 dated 20 October 1992 published in the Gazette ofthe Government ofIndia. For a product to be eligible for ECO-Mark, itshall also carry the Standard Mark ofthe SIS besides meetingadditional environmentfriendly requirements. Forthis purpose, the Standard MarkofBIS would be a single mark beinga combinationofthe lSI Markand the Eco logo. Requirements to be satisfied for a productto qualify for the BIS Standard Mark for Eco friendliness, will be optional. Manufacturing units will be free to opt for lSI Mark alonealso. The ECO criteria is based on the Gazette Notification No. 170 dated 16 May 1996 for wood substitutes as environment friendly products published in the Gazette ofGovernmentofIndia. The compositionofCommittee responsible for the formulation ofthis standard is given at Annex C. For the purpose ofdecidingwhethera particularrequirementofthis standard is compliedwith, the final value, observed or calculated, expressing the result ofa test or analysis, shall be rounded off in accordance with IS 2 : 1960 'Rulesfor roundingoffnumericalvalues(revised)'. Thenumberofsignificantplacesretainedinthe rounded offvalue should be the sameas thatofthe specified value in this standard. HazardClassI- Environmentwithrelativehumiditylessthanorequalto70percentsothatequilibriummoisturecontentofMDFwillnot •t bemorethanI5percent. 2.HazardClass2- Environmentwithrelativehumiditymorethan70percentsothatequilibriummoisturecontentofMDFwillnotbemore than20percent. IS 11406: 1003 Indian Standard MEDIUM DENSITY FIBRE BOARDS FOR GENERAL PURPOSE - SPECIFICATION ( First Revision) 1SCOPE as a first step towards defibration. The chips may be in the form offlakes, granules, shavings, splinterand 1.1Thisstandardcoversthe requirementsofmedium sliveras statedbelow: density fibre boards for general purposes having density in the range of600-900 kg/m'. a) Flakes - Specially made thin flat particles, with thegrain ofthewoodessentiallyparallel 1..2Thisstandarddoes notcoverveneeredorlaminated to the surfaceofthe flake, prepared with the or prelaminated or other specially treated boards, cuttingactionofthe knife ina plane parallel moulded boards, etc. to the grainbut at an angle to the axis ofthe 2REFERENCES fibre. b) Granule - A particle in which the length. The standards listed in Annex A contain provisions, widthand thicknessareapproximatelyequal, which through reference in this text, constitute such as particleofsaw-dust. provisionofthis standard. At the time ofpublication, the editions indicated were valid. All standards are c) Shaving- A thinsliceorstripofwood pared subjectto revisionand partiestoagreementsbasedon off with a knife, planer or other cutting this standard are encouraged to investigate the instrument, the knife action being possibilityofapplyingthe most recenteditionsofthe approximately along the axis of the fibre, standards indicated in Annex A. such asthe shavingsproduced in planingthe surfaceofwood. 3 TERMINOLOGY d) Splinter and Silver - Particle of nearly 3.1 For the purpose of this standard, the following square or rectangular cross-section with a definitions shall apply and for definitions other than length parallel to the grainofthe woodofat those given below, referencemay be made to IS 707. least four times the thickness. ' 3.2 Additive- Any material introduced priorto the 3.8 Sizing Material - Alum, wax, resin or other final consolidation ofa board to increase bulking or additiveintroducedtothe agglomerate for MDF prior improve someproperty ofthe final board. Fillers and to forming, primarily to increase water resistance. preservatives are included under this term. 4 TYPES 3.3 DeObration- Underthe influenceofsteamand heat, lignin issoftenedand the fibres can beseparated Mediumdensityfibre boardsfor general purposeshall fromeach otherby a lowenergyoutput. Normally in beofone typeonly,that is, flatpressedsinglelayer. It mediumdensityfibre boardplant,the fibre separation may, however,beoftwo Grades,GradeIand GradeII takes place in defibrators where steamed chips are and may be designated as follows: pushed through screws and ground between big grinding disc, one stationary and the other rotating. Grade Designation Solid board Grade I SBO I 3.4 Fibre - Wood fibre produced by fiberising Solid board Grade II SBG II steamed wood under pressure in a refiner and defibrator. 5MATERIAL 3.5 Formation (Forming) - The laying of the 5.1Wood blendedmassofglued fibres toformamatformedium density fibre board. Any species of wood or any other lignocellulosic material may be used forthe manufactureofmedium 3.6 MDF- MDF istheshortterm formediumdensity density fibre boards. However, the purchaser may at fibre board. hisowndiscretion,specifyaparticularspeciesofwood 3.7 Particles- Distinctparticlesorfractionsofwood or any particular lignocellulosic material for the orotherlignocellulosematerialproducedmechanica lly manufactureofmediumdensityfibre boards. IS 12406 :1003 For ECO-Mark, only species of wood other than Width The width of plywood shall be natural forests, such as wood from rubber, coconut, 1.22m. cashew. industrial and social forestry plantations, etc Thickness: The thickness ofplywood shall be and shade trees from tea and coffee estates, wood 6, 9, 12, 15, 18, 22, 25, 30, 3S and residues or agricultural wastes shall be used for the 40mm. manufactureofMDF board. NOTE- Anyotherdimensionasagreedtobetweenthepurchaser andthemanufacturermaybeused. 5.2 Adhesive 8.2 Tolerances Anysuitable type ofsynthetic resin adhesive may be used for the purpose of bonding to comply with Tolerances on the nominal dimensions of finished physical and mechanical requirements given in boardsshallbe as follows: Table 1. Dimension Tolerance Length ±3mm/m 5.3 Sizing Material Width ±3mmlm Paraffin waxdissolvedinmineralspiritoralternatively Thickness ±0.3 mm emulsifiedwith water,ormeltedshall beused assizing Squareness 2mmlm material. Edgestraightness 2mmlm 5.4 PreservativeTreatment 9 PHYSICAL AND MECHANICAL REQUIREMENTS Asuitablepreservativemay be addedto the fibre mix at the mixing stage of adhesive. The following Density, moisture content, water absorption, linear preservatives are regarded as suitable and their expansion, modulus ofelasticity, modulus ofrupture, percentageisgivenon the basisofovendry weightof internalbondingandscrewwithdrawalstrengthofMDF fibres: boards when tested in accordance with 10 and 11, shall meetthe requirements specified in Table I. a) Sodium pentachlorophenate to the extentof 2 percent, and 10 SAMPLINGAND INSPECTION b) Trichlorophenol to the extent ofSpercent. 10.1ScaleofSampUng 6MANUFACTURE 10.1.1 Lot Wood or any other lignocellulosic material shall be cut into small chips/particles on a suitable chipping In any consignment, all the MDF boards of same machine. Thesechipsshall be steamedand defibrated grade,typeand Ndimensionsandmanufacturedunder in suitable defibrating machine. These fibre thus similar conditions of production shall be grouped produced shall be dried in flash dryers and blended togetherto constitute a lot. with resin and wax. The blended fibres shall then be 10.t.2Theconformityofalot, to therequirementsof formed intomatsbyair feltingandpressedinto panels this specification, shall be ascertained on the basisof by passing into press under controlled heat, pressure tests on MDFboardsselected from it. and time conditions. 10.1.3ThenumberofMDFboardstobeselectedfrom 7 FINISH a lot shall be in accordance with the following: Medium density fibre board shall be of uniform Lot Size NumberofMedium Density thicknessand densitythroughoutthe lengthand width Fibre Boards to be Selected ofthe boards. All medium density fibre boards shall N n be flat. Both surfacesofthe boardsshaHbe sanded to Up to SO 2 a smooth finish. The boards shall be rectangular and 51-100 3 shall have square edges. Edge straightness and 101-200 4 squarenessshallbemeasuredaccordingtothe method 201-300 5 given in Annex B. 301-S00 7 SOI andabove 10 8DIMENSIONSANDTOLERANCES 10.1.4TheseMDFboardsshallbe selectedatrandom 8.1 Thedimensionsofplywoodshallbe as follows: (see IS 4905). In order to ensure randomness of Length Thelengthofplywoodshall be5.49, selection, all the MDF boards in the lot may be 4.89, 3.66, 3.05, 2.44, 1.83 and arranged in a serial order and every rlh MOF board 1.22m. maybe selected till the required number is obtained, 2 IS 12406 : 2003 rbeingtheintegralpartofNln, whereN isthe lotsize 10.3 Criteriafor Conformity and n is the sample size. A lot shall be considered as conforming to the requirements ofthis specification, ifall the samples 10.2TestSpecimensand NumberofTests and test specimens pass the conditions as prescribed The length, width, thickness and the diagonalsofthe in 11. MOP boards selected as in 10.1.3 shall be measured 10.4Ifanysamplefailstoconformtotherequirements, before cutting the MDF boards for taking test further samples shall be taken from the lot,double in specimens. The straightness ofedge shall also be measured. number,andthelotshallbeconsideredtohavepassed, if these samples conform to the requirements 10.2.1 From each of the MDF boards selected, prescribed. following test specimensshall becut out for portions 150 mm away from the edges for tests as specified 11TESTING OF SAMPLES under11.The methodofpreparationandconditioning 11.1 Thesamplesdrawnand the test specimensmade ofspecimens for tests listed in(c), (d), (e), (f) and (g) below shall be as specified in IS 2380(Part 1). therefrom inaccordancewith 10shall besubjectedto thetestsasgiven in11.3to11.10. Thespecimensshall a) For determination ofdensity - Three test meet the requirementsspecifiedinTable I (seealso9 specimens from each sample, each of size and 10.3). 150mm x 7S mm x full thickness ofboard. Othersizesofsamplespecimensmaybeused 11.2 Preparation and Conditioning of Test when deemednecessary. Specimens b) For determination ofmoisture content All the test specimens shall be prepared and Threetestspecimensfrom each sample,each conditioned before testing in accordance with the ofsize 150rom x 7S mm x full thickness of proceduregiven in IS 2380(Part 1). board. Smallerspecimensmaybeused when deemednecessary. 11.3 AccuracyofDimensionsofBoards c) For water absorption test - Three test specimens from each sample, each ofsize All the samples selected in accordance with 10.2.1 300 mm x 300 mm x fullthicknessofboard. shallbemeasuredforstraightnessofedges, squareness d) For determination oflinear expansion: ofboards, lengths, widths and thickness as given in IS 2380 (Part 2). The dimensions shall comply with 1) Due togeneralabsorption- Threetest the requirements specified in 8. specimensfromeachsample,eachofsize 200 mm x 100 mm x full thickness of 11.4 Testfor Density board. Theaveragevalueofdensityasprescribed in10.2.1(a), 2) Due tosurfaceabsorption - Threetest when tested inaccordancewith IS2380(Part 3) shall specimensfromeachsample,eachofsize meet the requirements specified inTable I (see 9). 200 mm x 100 mm x full thickness of board. 11.5Testfor MoistureContent e) For determination ofmodulus ofelasticity The average value ofmoisture content as prescribed and modulus of rupture - Three test specimenseachformodulusofelasticityand in 10.Z.I(b), when tested in accordance with IS 2380 modulus of rupture, from each sample to (Part 3), shall meet the requirements specified in conform to dimensions as specified in 2 of Table 1(see 9). IS2380 (Part 4). 11.6Testfor WaterAbsorption f) Internal bond - Six specimens from each sample conforming to the dimensions The average value ofwater absorption as prescribed specifiedinJofIS2380(Part5).Outofthese, in 10.2.I(c),when tested in accordance with IS 2380 three specimensshall besubjectedtothe test (Part 16) shall not exceed the limits specified in for internal bond as given in 11.9. The Table 1(see9). remainingthree specimensshallbesubjected toeithercyclicoracceleratedwaterresistance 11.7TestforLinearExpansion(SwellinginWater) test as given in 11.9.1. 11.7.1 Due to GeneralAbsorption g) For screw withdrawal lest - Three test The average value oflinear expansion as prescribed specimensfromeachsampleconformingtothe in IO.l.l(d), when tested in accordance with IS 2380 dimensions specified in2ofIS2380(Part 14) 3