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FLUORESCENT POWDER SUSPENSION CONSUMER GREEN (GN 1)

WARNINGFor the risks involved in storage, transport and

handling of this product see:

BXV 11-32-15534 in the data base FASIM

1.SCOPE

This document gives measures and requirements to be observed during the preparation and refers also to the company instructions on safety and environmental control.

2.GENERAL CLAUSE

There shall be no change in the basic materials or in the existing manufacturing process which might influence the quality without prior consultation with the user or his representative.

3.CHARACTERISTICS

It is a suspension with green flu-powder.

Formula:

not applicable

CAS-no.:

not applicable

Rel. molecular mass: not applicable.

4.STARTING MATERIALS FOR BASIC SUSPENSION

Quantity

Designation

Code number

----------------------------------------------------------------------------------------------------------------------------

87lDeionized water no. 2

1322 505 41701

100 kgFlu-powder NP 2221-273

1322 527 91301

3000mlSurface act. agent 0201 (sln 10 %)

1322 514 78701

75lPVAL-Solution (5,4%) i.e.:

Polyvinyl alcohol 88/40 mPa.s, solution 5,4% (Mowiol) or1322 512 08601

Polyvinyl alcohol 88/50 mPa.s (2) solution 5,4% (Denka Poval)1322 510 32701

330 mlDispersion agent 003, solution 10%

1322 524 20001

Alt.: Dispersion agent 004, solution 10%

1322 524 24301

1840mlAmmoniacal ADC-solution 16,6%, pH = 7.1 - 7.3

1322 524 11401

5.AUXILIARY MATERIALS

Deionized water no. 2

1322 505 41701

Vacuum

6.EQUIPMENT

For suspension preparation per e.g. 100 kg of fluorescent powder (dry material)

Vacuum tank (see "GENERAL" item 5)

Transfer pump

Installation with suspension tanks

Balance, capacity 100 kg

Suspension transport trolley

7322 012 56151

Suspension dispensing trolley

7322 012 55711

(De-aeration cover)

Modified Russell sieve, type 22 HD/SD/SS, model 16350

7322 301 76501

Nylon gauze, mesh size 15 2 m (for Russell sieve)

1222 001 22035

Graduated cylinder, cap. 1L, to NLN-A 1425

2822 060 11426

Graduated cylinder, cap. 250 ml, to NLN-A 1425

2822 060 11419

Polythene bottles, cap. 10L

2822 800 06157

Hydrometer, 1.00 - 1.20, to NLN-A 1899

2822 060 14004

Hydrometer, 1.20 - 1.40, to NLN-A 1899

2822 060 14005

Viscometer "Epprecht Rheometer"

RV-2-1-2/409

pH meter

PW9409

pertaining measuring cell

C13AA

Thermometer, range 50 oC

2622 799 29936

(Jar mill)

7.INSTRUCTIONS

Directives for preparing fluorescent powder suspension for colour TV tubesRV-2-1-53/401

Determining the viscosity with an Epprecht Rheometer

RV-2-1-52/500

Determining the filterability of suspensions for colour tubes

RV-2-1-52/495

Stability test for fluorescent powder suspensions for colour tubes

RV-2-1-52/496

Sieving suspension by means of Russell sieve

RV-2-1-60/401

8.PREPARATION

GN 1 - Preparation of suspension from green fluorescent powder (fresh powder NP 2221-273 and regenerated powder NP 2221-273R).

GENERALA.In view of ageing effects the basic suspension must not be stored for more than 2 weeks.

The suspension can be prepared as required by proportionating the quantities of chemicals and fluorescent powder and of course by using the appropriate equipment.

B.During flu-powder addition by means of vacuum quite a lot of foam is produced. To prevent the foam from getting in the vacuum line, either prepare less suspension or discontinue powder supply for a short time and break the foam by alternately admitting air and evacuating.

C.Criteria for stirring during dispersion.

The powder must not settle. To prevent settling, especially when dry powder is used, the speed of the stirrer must be higher (orientation speed: 40 r.p.m.) than e.g. in a storage tank. Especially when large quantities of suspension are to be prepared the shape of the stirrer and that of the vessel must well match.

See also "GENERAL"

Ratio PVAL : ADC = 12 : 1

NOTE:Values between brackets [...] are FOR ORIENTATION ONLYRequirementsUnits

BASIC SUSPENSION per 100 kg flu-powder as dry material

Dispersing (in vacuum tank or mixing vessel)

Deionized water

Slowly add flu-powder whilst stirring intensively

Sorgen TW 20 (10 %)

Mix intensively (when using a vacuum tank: under sufficient low pressure) for

PVAl-solution (5.4%)

Orotan (10 %)

Mix intensively

Ammoniacal ADC-solution (16.6% pH=7.2)

Homogenize

Transfer the suspension to the storage tank

Rinse the equipment with deionized water and transfer the rinsing water to the storage tank.

Rinse the equipment once again with deionized water and transfer the rinsing water to the storage tank.

Homogenize, at least65

100

3000

15

75

330

120

1860

> 120

10

10

30l

kg

ml

min.

l

ml

min

ml

min

l

l

min

Yield:Maximum shelf-life190

2l

weeks

Measure for inspection:-Density

-Viscosity at 20 C (Epprecht)

corresponds with cup A/position III, 50 Hz

-pH-value

Sieve half a litre of basic suspension through a Russell vibratory sieve with 1 layer of 15 2 m nylon gauze and correct it till it fullfils the dispensing requirements. Next determine:

-Filtration velocity

-Stability of the suspension:solidity of sediment

volume of sediment[1.38-1.40]

[12-13]

[24 26]

7.0 7.5

> 400

firm

< 15g/cm3mPa.s.

scale div.

ml/15 s.

ml

DISPENSING SUSPENSIONPrior to use, pass suspension through Russell vibratory sieve with 1 layer of 15 2 m nylon gauze.

The dispensing suspension is composed of reclaimed suspension and basic suspension.

The mixing ratio shall be such that a state of balance is attained; starting from a certain quantity of dispensing suspension such a quantity of basic suspension will have to be added to the reclaimed suspension that (after correction of density and viscosity) the starting quantity of dispensing suspension is obtained again.

Mix suspsensions and correct mixture until it satisfies the following requirements:

-Viscosity at 20 C (Epprecht)

corresponds with cup A/position III, 50 Hz

If necessary increase viscosity by adding PVAl-solution (5.4%); per litre of PVAl-solution add amm. ADC-solution (16.6%).

If necessary decrease viscosity by adding deionized water.

-Density (local choice, depending on phosphor weight)

If necessary lower the density by adding diluent; per litre diluent add amm. ADC-solution (16.6%)

-pH-value12.3 0.5

25 1

24.6

[1.20-1.24]

0.005

11.5

7.0 7.5 mPa.s.

scale div.

ml

g/cm3ml

RECLAIMED SUSPENSIONThe excess suspension which is expelled from the flowcoating mill is to be collected in a tank with stirrer (e.g. storage trolley).

Because of the lower pH-value of the reclaimed suspension, mix it with basic suspension as soon as possible.

DILUENTTransfer to a 10 L polythene bottle:PVAl-solution (5.4%)

Deionized water

Anti-foaming agent (L62, 1%)

Mix with stirrer or on jar mill for at least4000

4500

60

30ml

ml

ml

min.

Only use through 15 2 m nylon gauze and foam-free

-Viscosity at 20 C (Epprecht)

corresponds with cup A/position III, 50 Hz

Maximum shelf-life12.3 0.5

25 1

[2]mPa.s.

scale div.

weeks

9.REQUIREMENTS9.1PROPERTIES

See under "Preparation"

9.2DELIVERY

Packing and labelling shall satisfy the legal regulations.

The quantity per unit of packing is to be determined by mutual agreement.

Note: Packing numbers see CODIS or UCT 12-1322.

9.3STORAGE LIFE

Max. shelf-life 2 weeks.

10.ADDITIONAL PHISYCAL DATA

None

11.SAFETY AND ENVIRONMENTAL CONTROL

The safety instructions specified below are to be used only in consultation with the safety expert.

11.1STORAGE

See concern safety manual, volume 1, section BXV 11-0 "Dangerous Substances".

11.2LABELLING

See BXV 11-37 "Dangerous Substances", labels for substances in use and BXV 11-32-15534 in the data base FASIM.

11.3TRANSPORT AND TRANSSHIPMENT

See BXV 11-36 in the data base FASIM.

11.4PROCESSING

The following safety measures shall be observed:

BXV 11-32-15534 in the data base FASIM

11.5DISCHARGE AND DISPOSAL OF WASTE AND RESIDUAL MATERIALS

See concern safety manual, volume 1, section BXV 11-0 "Dangerous Substances" and, in the Netherlands, TUX-MH-101 "Handleiding Verwijderen Chemische Afvalstoffen" (Regulations for the Disposal of Chemical Waste Materials).

12.SUPPLIER

Local Department.

13.APPLICATION

For applying the green flu-powder pattern of consumer tubes.

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Chemical specification

clogs code1NB550FLU-PDR SUSP. CONSUMER

prev99-06-14

milestonesheet 101GREEN (Nichia)1322 528 74701

date00-01-31

archiveTVdesignH. GEERTSgroup110page1

PHILIPS ELECTRONICS N.V. 1995

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