FTMS_191A_Method_5903-1978_织物阻燃性测试_垂直法(2)

5.9 A tearing force shall be applied gently to the specimen by grasping the corner of the cloth at the opposite edge of the char from the load and

raising the specimen and weight clear of the supporting surface.The end of

the tear shall be marked off on the edge and the char length measurement made along the undamaged edge.

5.9.1 Loads for determining char length.The specific load applicable to

the weight of the test cloth shall be as follows:

Specified weight per square yard Total tearing weight

of cloth before any fire retardent for determining the

treatment or coating charred length

Ounces per square yard g/m2Pounds kg

2.0 to 6.068 to 2030.250.1

Over 6.0 to 15.0Over 203 to 5080.50.2

Over 15.0 to 23.0Over 508 to 7800.750.3

Over 23.0Over 780 1.00.45

5.10 The after-flame time and after-glow time of the specimen shall be recorded to the nearest 0.2 second and the char length to the nearest 1/8

inch (1 mm).

6.REPORT

6.1 The after-flame time, after-glow time and char length of the sample unit shall be the average of the results obtained from the individual specimens tested.All values obtained from the individual specimens shall be recorded.

6.2 The after-flame time and after-glow time shall be reported to the nearest 0.2 second and the char length to the nearest 1/8 inch (1 mm).

FED. TEST METHOD STD. NO. 191A

METHOD 5903

7.NOTES

7.1 Suggested sources of materials and equipment.

7.1.1 Gas mixture (4.4) and regulator valve system (4.3) are available from:

(a) Matheson Gas Products

P.O. BOX 85

East Rutherford, NJ 07073

(b) Air Products and Chemicals, Inc.

P.O. BOX 538

Allentown, PA 18105

7.1.2 Test cabinet (4.1) is available from:

(a) U.S. Testing Company

1941 Park Avenue

Hoboken, NJ 07030

(b) The Govmark Organization, Inc.

P.O. BOX 807

Bellmore, NY 11710

FED. TEST METHOD STD.NO. 191A

METHOD 5903

FED. TEST METHOD STD. NO. 191A

.

METHOD 5903

FED. TEST METHOD STD. NO. 191A

METHOD 5903

FED. TEST METHOD STD. NO. 191A

METHOD 5903

FED. TEST METHOD STD. NO. 191A