ppt 210 secondary fiber

7/26/2019 PPT 210 Secondary Fiber

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Secondary FiberSecondary FiberPPT 210PPT 210


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Secondary FiberSecondary Fiber

Fibrous material that has been through theFibrous material that has been through the

manufacturing process and is being recycled asmanufacturing process and is being recycled as

the raw material for another manufacturingthe raw material for another manufacturing

productproduct


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Recycling/Secondary Fibers


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Waste PaperWaste Paper

CollectCollect

SortSort

ClassifyClassify Know Its VariablesKnow Its Variables


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Contaminant ListContaminant Listby Severityby Severity

ContaminantContaminant

Pressure Sensitive Adhesive (Most Severe)Pressure Sensitive Adhesive (Most Severe)

Non!is"ersible AdhesivesNon!is"ersible Adhesives

Non!is"ersible Varnish Coatin#sNon!is"ersible Varnish Coatin#s

$lectrostatic In%s$lectrostatic In%s

Chi"boardChi"board

Non!is"ersible In%sNon!is"ersible In%s

Poly Coatin#Poly Coatin#

Carbon Pa"erCarbon Pa"er

PlasticPlastic

&et Stren#th Pa"ers&et Stren#th Pa"ersStrin#Strin#

'nbleachable Pa"er'nbleachable Pa"er

Metal (east Severe)Metal (east Severe)

RatingRating

**

++++

+,+,

+-+-

.,.,

././

*.*.

*0*0

,,

1+1+/./.

/0/0


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Stickies ContaminantsStickies ContaminantsChemical CompositionChemical CompositionResins:Resins:

Hot Melts:Hot Melts:

Wet Strength Resins:Wet Strength Resins:

Latex:Latex:

Polyvinyl AcetatePolyvinyl Acetate

Polyvinyl AlcoholPolyvinyl Alcohol

Polystyrene (foam)Polystyrene (foam)

PolypropylenePolypropylene

PolyethylenePolyethylene

a!esa!esTarTar

AsphaltAsphalt

PitchPitch

Pare"Pare"

#ymene#ymene$elamine$elamine

%rea%rea

S&' 'bberS&' 'bber

inyl Acrylicsinyl Acrylics

Pressre Sensitive AdhesivesPressre Sensitive Adhesives

*ther Synthetics*ther Synthetics


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Coatin+s ContaminantsCoatin+s ContaminantsContaminantContaminantss

Clay Coatin+sClay Coatin+s

Original UseOriginal Use

Added to ,ive PaperAdded to ,ive Paper- Smooth Srface- Smooth Srface

Paper or PaperboardPaper or Paperboard.aminates and.aminates andCoatin+sCoatin+s

Added to +ive ,oodAdded to +ive ,ood,loss and ,rease,loss and ,rease'esistance/ apor'esistance/ aporProofness eatProofness eatSealin+ Stren+thSealin+ Stren+thand Specialand Special'esistance to'esistance toSolventsSolvents

In-Mill ProcessingDifficulty

Disintegrates into Flakes

Causing Defects in Final

Product

Difficult to Disperse in

Pulper; Formation of

Objectionable Specks or

Pellets; Fouls Euipment

Causes Difficulty in

Deinking

!a" Coatings

Sol#ent Coatings

$cellulose nitrate%

#inyl&


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Coatin+s ContaminantsCoatin+s Contaminants

(contd)(contd)ContaminantsContaminants

.ate!.ate!


%sed as &inders%sed as &inders

and Satrants forand Satrants for

Paper and &oardPaper and &oard

PolyethylenePolyethylene

PolypropylenePolypropylene

and Polyamideand Polyamide'esins Applied by'esins Applied by

3!trsion3!trsion$ethod$ethod


Difficult to Remo#e in

Some Cases;

Detrimental to Pulp'uality

Does not Disintegrate

During Cooking and

Difibering; Detrimental

to Pulp 'uality

E"trudedCoatings


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*ther Contaminants*ther ContaminantsContaminantsContaminants

et Stren+thet Stren+th

PolystrenePolystrene


Paper Treated 4ithPaper Treated 4ith

'esins'esins

&locks &eads etc&locks &eads etc

%sed in Packin+%sed in Packin+


Does not Disperse in

Pulper; Causes Spots

in ProductDifficult to Remo#e%

Sticks to Rolls% (ndents

S)eet and Causes

Pickscouts


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RePulping of WasteRePulping of Waste

PaperPaper Continuous Pul"erContinuous Pul"er

2a##er2a##er

Cla3 ShellCla3 Shell !etrasher!etrasher

!is"er#er45beri6er4!e7a%er!is"er#er45beri6er4!e7a%er


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Repulping of WasteRepulping of Waste

PaperPaper 8atch Pul"er8atch Pul"er

!ewire or &ire 2e3oval!ewire or &ire 2e3oval

!etrasher!etrasher 9eavies Screen4Cleaner9eavies Screen4Cleaner

!e7a%er!e7a%er


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Recycled Fibers


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*)e Process +egins , !aste Paper

+ales


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Rejects

-ylte .useum


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Pulper Sc)ematic


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Variables of RePulpingVariables of RePulping

Stoc% :e3";Stoc% :e3"; 9i#h until it a


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Plper ConditionsPlper Conditions

ConsistencyConsistency 5%5%

TemperatureTemperature 5!"5!"ooCC

pHpH #$5!&$#$5!&$

TimeTime '!5 mins'!5 mins

(nergy(nergy 5!) *+h,t5!) *+h,t

-leach-leach .one/.one/

Hypochlorite/Hypochlorite/

0eroxi1e/ Hy1rosul2te0eroxi1e/ Hy1rosul2te


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Potential aste PaperPotential aste Paper

'ecovery 'ates'ecovery 'ates

Potential

Reco#ery Rates

$0123&

$451203&

$61503&

$6003&

$03&

$52103&


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Where UsedWhere Used

Multi"ly = +*>Multi"ly = +*> Corru#ated Mediu3Corru#ated Mediu3

Pa"erboardPa"erboard

8uildin# Products = 0->8uildin# Products = 0->

News"rint et al = 0*>News"rint et al = 0*>


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Eect of Repeated RecyclingEect of Repeated Recycling

on Strength Properties ofon Strength Properties of

Unbleached Kraft PulpUnbleached Kraft Pulp


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Effect of Recycling


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'ecyclin+ *perations'ecyclin+ *perations

StepStep 0rincipal Contaminant 3unctions0rincipal Contaminant 3unctions

Preplpin+Preplpin+ 5 Classi6cation of Paper Sorces by5 Classi6cation of Paper Sorces by ,rade,rade

5 7ality Control of the ,rades5 7ality Control of the ,rades

5 Contaminant 'emoval From Papers5 Contaminant 'emoval From Papers

Plpin+Plpin+ 5 ettin+ of Paper5 ettin+ of Paper

5 Conditionin+ of Fiber5 Conditionin+ of Fiber

5 Conditionin+ of Contaminants5 Conditionin+ of Contaminants

5 'emoval of .ar+e Type Contaminants5 'emoval of .ar+e Type Contaminants

Secondary Plpin+Secondary Plpin+ 5 ettin+ of Fiber &ndles5 ettin+ of Fiber &ndles

5 Conditionin+ of Fiber5 Conditionin+ of Fiber

5 'emoval of $edim Si"e and eavy5 'emoval of $edim Si"e and eavy ContaminantsContaminants


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'ecyclin+ *perations contd'ecyclin+ *perations contd


Coarse Screenin+Coarse Screenin+ 5 'emoval of $edim Si"e Particles5 'emoval of $edim Si"e Particles

Coarse Cleanin+Coarse Cleanin+ 5 'emoval of $edim eavy Contaminants5 'emoval of $edim eavy Contaminants

8einkin+8einkin+ 5 9nk 'emoval5 9nk 'emoval

5 Ash 'emoval5 Ash 'emoval

5 Small eavy and .i+ht Particles 'emoval5 Small eavy and .i+ht Particles 'emoval

Screenin+Screenin+ 5 $edim and Small Particle 'emoval5 $edim and Small Particle 'emoval


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Cleanin+: For4ardCleanin+: For4ard 5 Small eavy Particle 'emoval5 Small eavy Particle 'emoval

'everse'everse 5 Small .i+ht Particle 'emoval5 Small .i+ht Particle 'emoval

Color Strippin+Color Strippin+ 5 $odi6cation of 8yes5 $odi6cation of 8yes

5 .i+nin Conditionin+5 .i+nin Conditionin+

5 Fiber Conditionin+5 Fiber Conditionin+

$echanical$echanical 5 To redce the Contaminant Particle Si"e5 To redce the Contaminant Particle Si"e %sally%sally

to &elo4 10 $icronto &elo4 10 $icron

8ispersion8ispersion 5 Fiber Conditionin+5 Fiber Conditionin+


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Chemical 8ispersionChemical 8ispersion 5 To Separate Fibers5 To Separate Fibers

5 To 'edce Contaminants Particle Si"e5 To 'edce Contaminants Particle Si"e$ainly$ainly 9nk Particles9nk Particles

5 Fiber Conditionin+5 Fiber Conditionin+

8e;akin+8e;akin+ 5 To Separate Fiber &ndles5 To Separate Fiber &ndles

5 To Separate Particles From Fibers5 To Separate Particles From Fibers


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ppt 210 secondary fiber

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