IPC-TM-650 EN 2022 试验方法.pdf - 第210页

0SHA recommended exposure limits for chlorinated sol- vents (all in parts per million). Chlorinated Solvent Perchloroethylene Trichloroethylene 1,1,1-Trichloroethane Methylene Chloride OSHA 8H r TWA 1 100 100 350 500 ACG…

5.2.2.3

Dilute

solution to exactly 1 liter and stopper. See 6.3

for safety and handling information and 6.4 for first aid infor-

mation.

5.3

Test Procedure

5.3.1

Measure specific gravity of sample using ASTM

Method D 2111-95.

5.3.2

Bulb

pipet exactly 25 ml sample into a 250 ml Erlen-

meyer flask.

5.3.3 Bulb

pipet exactly 25 ml hydrochlorination reagent into

sample, stopper, then mix thoroughly.

5.3.4

Let

sit 15 to 20 minutes for complete reaction. During

reaction time, a blank may be run (see 5.3).

5.3.5

When

reaction time is complete, add five drops of bro-

mothymol blue 0.1% solution with an eye dropper.

5.3.6

Titrate

the sample to endpoint with 0.1 N NaOH solu-

tion. The endpoint is reached when solution color changes

from yellow to blue.

5.4

Blank

5.4.1

Bulb

pipet exactly 25 ml hydrochlorination reagent into

a 250 ml Erlenmeyer flask.

5.4.2

Add

five drops bromothymol blue 0.1% solution with

an eye dropper.

5.4.3

Titrate

blank to endpoint with 0.1 N NaOH solution.

The endpoint is reached when solution color changes from

yellow to blue.

5.5

Disposal of Solutions

5.5.1 0.1 N NaOH in Methanol, Unused

This

solution is

dilute and readily soluble in water, hence it can be safely

poured down the sink. Flush with excess water.

5.5.2

All Other Solutions

NOT POUR DOWN THE

SINK. Place the solutions in appropriate, labeled, metal con-

tainers to be buried or burned in accordance with local, state,

and federal regulations.

5.6

Cleaning Glassware

Use

soap and water to clean any

glassware. Rinse well with excess water.

5.7

Safety and Handling, First Aid

See

6.3 and 6.4.

6 Notes

6.1

Calculations:

(B−A) x 0.4

sample x specific gravity (1)

= Total Acid Acceptance as % of NaOH

where:

= ml of 0.1 N NaOH used to titrate sample

B = ml of 0.1 N NaOH used to titrate blank

(1)

See sale specification for specific gravity of solvent choice.

6.2

Interpreting Test Results*

Chlorinated

Solvent

Methylene

Chloride

1,1,1-

Trichloroethane

Perchloroethylene

Within Normal

Range

>0.08%

>0.04%

Solvent is Borderline

Check Daily

0.04%-0.08%

≤0.04%

A) Discard

B) Remove, distill blend

with virgin solvent at 4

parts virgin solvent, 1

part distilled.

<0.04%

*Note: These

guidelines have been established using inhibited chlorinated solvents from the

Dow Chemical Company. The solvent manufacturer should be consulted for particular inter-

pretation.

6.3

Safety and Handling

6.3.1 Sampling Procedure

Wear

safety goggles and neo-

prene or neoprene-coated gloves. Have adequate ventilation.

Avoid sparks or flames.

6.3.2

Laboratory Procedure

There

are no unusual haz-

ards inherent in this method, but good ventilation and normal

laboratory safety precautions should be employed. When pre-

paring reagents, mixing should be employed in a hood and

chemical goggles should be worn. Keep away from any

sparks or flames.

IPC-TM-650

Number

2.3.36

Subject

Acid

Acceptance of Chlorinated Solvents

Date

10/85

Revision

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0SHA

recommended exposure limits for chlorinated sol-

vents (all in parts per million).

Chlorinated

Solvent

Perchloroethylene

Trichloroethylene

1,1,1-Trichloroethane

Methylene

Chloride

OSHA

8Hr

TWA

100

350

500

ACGIH

TLV

350

100

ACC

200

450

1000

AMP

300/5 min. in any 3 hrs.

200/5 min. in any 2 hrs.

2000/5 min. in any 2 hrs.

a. No limits established by OSHA. ACGIH recommends a short term exposure limit (STEL) of

450 ppm.

(1) TWA–Time Weighted Average

(2) ACGIH–American Conference of Governmental Hygienists

TLV–Threshold limit values from ACGIH Handbook, 83/84

(3) ACC–Acceptable Ceiling Concentration

(4) AMP–Acceptable Maximum Peak

6.4

First Aid

6.4.1 Eye Contact

Rinse

eyes with running water for at

least 30 minutes. Prompt medical attention is essential.

6.4.2

Skin Contact

Flush

the area thoroughly with water.

Wash clothing before reusing it.

6.4.3

Oral Ingestion

NOT INDUCE VOMITING. Call a

physician or transport the worker to an emergency facility.

6.4.4

Inhalation

Remove

the worker to fresh air if the

worker starts feeling dizzy or light-headed. Contact a physi-

cian or transport the worker to a medical facility. If breathing

stops, give mouth-to-mouth resuscitation. Administer oxygen

when breathing starts (see 6.3.2 for chlorinated solvent expo-

sure limits).

6.4.5

Additional Help

For

any additional chemical related

medical help, call Chemtree Emergency at 800) 424-9000. In

Canada call (collect) Canutel (613) 996-6666.

6.5

All

equipment and chemicals used were purchased from

Van Waters and Rogers standard lab supply catalog.

6.6

This

test is designed for the base chlorocarbons only;

therefore, discretion should be used when testing bipolar sol-

vents.

6.7

Specific Questions

Any

specific questions can be

referred to Dow Chemical U.S.A., Inorganic Chemicals

Department, Technical Service and Development, Midland,

Mich. 48640.

IPC-TM-650

Number

2.3.36

Subject

Acid

Acceptance of Chlorinated Solvents

Date

10/85

Revision

age3of3

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Scope

The

purpose of the two test methods is to provide

means for determining the volatile content of adhesive coated

dielectric films used in the manufacture of flexible printed wir-

ing. Method A is a weight loss procedure. Method B is a

headspace gas chromatography procedure.

Applicable Documents

None

Test Specimen

3.1 Method A

The

test specimens shall be squares of

adhesive coated dielectric film. The specimens shall be 10 cm

x10cm.

This method is to be used for non-aqueous solvent systems

only.

3.2

Method B

Three

specimens shall be prepared: One

specimen shall be cut from the center of the material and one

each from each edge of the material. Specimens shall be cut

no closer than 25.4 mm from the edge of the material.

Equipment/Apparatus

4.1 Method A

4.1.1 Analytical Balance

Analytical

balance capable of

weighing to the nearest milligram (0.001 gram).

4.1.2

Test Chamber

Circulating

air oven maintained at

150°C ± 2.8°C.

4.2

Method B

4.2.1

Analytical Balance

Analytical

balance capable of

weighing to the nearest 0.1 milligram (0.0001 gram).

4.2.2

Sample Vials

is essential that the septa are placed

with the Teflon® side toward the sample and that the vials are

sealed tightly enough that it is not possible to turn the lid by

hand.

4.2.3

Test Device

gas chromatograph fitted with a Head

Space Sampler and a data acquisition/manipulation system

capable of recording and quantitating gas chromatograms.

4.2.4 Chromatography Conditions

Tenax

column 6.35 mm O.D. 1.8 m long.

Injector temperature: Product dependent

Oven temperature: Product dependent

Isothermal

Flame Ionization Detector:

Carrier gas is Nitrogen at kg/cm

Adjust

equipment conditions for specific product being tested.

4.2.5

Headspace Conditions

Temperature

and dwell time

dependent on product tested.

Procedure Method A

5.1 Preparation

5.1.1.1

Condition

each specimen at 50% ± 5% relative

humidity (RH) and 23°C ± 2°C for a minimum of three hours.

5.1.1.2

Weigh each specimen to the nearest milligram

(0.001 gram) [W

5.1.1.3

Subtract

out substrate weight by calculating the

area x the density of the substrate under test (W

5.1.1.4

Hang

each specimen from a metal hook in the cir-

culating air oven at 150°C ± 2.8°C for 15 ± 1 minutes.

5.1.1.5

Remove

each specimen from the chamber and

place in a stabilization environment of 50% ± 5% RH and

23°C ± 2°C for a minimum of three hours.

5.1.1.6

Reweigh

each specimen to the nearest milligram

5.1.1.7

Subtract

out substrate weight by calculating the

area x the density of the substrate under test (W

Method B requires proprietary information regarding the constituents of the material.

The

Institute for Interconnecting and Packaging Electronic Circuits

2215 Sanders Road • Northbrook, IL 60062-6135

IPC-TM-650

TEST

METHODS MANUAL

Number

2.3.37

Subject

Volatile

Content of Adhesive Coated Dielectric

Films

Date

5/98

Revision

Originating Task Group

Flex Peel Strength Test Methods Task

Group (D-13A)

Material

in this Test Methods Manual was voluntarily established by Technical Committees of the IPC. This material is advisory only

and its use or adaptation is entirely voluntary. IPC disclaims all liability of any kind as to the use, application, or adaptation of this

material. Users are also wholly responsible for protecting themselves against all claims or liabilities for patent infringement.

Equipment referenced is for the convenience of the user and does not imply endorsement by the IPC.

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