1、T 1014 om-10 OFFICIAL TEST METHOD 1992 WITHDRAWN 2000 REVISED AND REINSTATED 2006 REAFFIRMED 2010 2010 TAPPI The information and data contained in this document were prepared by a technical committee of the Association. The committee and the Association assume no liability or responsibility in conne
2、ction with the use of such information or data, including but not limited to any liability under patent, copyright, or trade secret laws. The user is responsible for determining that this document is the most recent edition published. Approved by the Standard Specific Interest Group for this Test Me
3、thod TAPPI CAUTION: This Test Method may include safety precautions which are believed to be appropriate at the time of publication of the method. The intent of these is to alert the user of the method to safety issues related to such use. The user is responsible for determining that the safety prec
4、autions are complete and are appropriate to their use of the method, and for ensuring that suitable safety practices have not changed since publication of the method. This method may require the use, disposal, or both, of chemicals which may present serious health hazards to humans. Procedures for t
5、he handling of such substances are set forth on Material Safety Data Sheets which must be developed by all manufacturers and importers of potentially hazardous chemicals and maintained by all distributors of potentially hazardous chemicals. Prior to the use of this method, the user must determine wh
6、ether any of the chemicals to be used or disposed of are potentially hazardous and, if so, must follow strictly the procedures specified by both the manufacturer, as well as local, state, and federal authorities for safe use and disposal of these chemicals. Moisture sensitivity of fiber glass mats 1
7、. Scope This test method covers the determination of the moisture sensitivity of fiber glass mat binder systems. 2. Applicable documents 2.1 TAPPI T 1007 “Sample Location.” 2.2 TAPPI T 1009 “Tensile Strength and Elongation at Break.” 3. Summary The specimens are submerged for a specified time in a w
8、ater bath at 180F (82C), removed, cooled to room temperature, and tested for tensile strength. The loss in tensile strength resulting from water soaking when compared to non-water-soaked specimens is reported separately and, optionally, as the percent loss in tensile strength. 4. Significance This m
9、ethod is a measure of the short-term sensitivity of fiber glass mat binder systems to hot water which may be related to long-term sensitivity to moisture under other conditions. 5. Apparatus and materials 5.1 Constant temperature water bath, capable of maintaining 180 5F (82 3C) of sufficient volume
10、 to properly immerse 10 specimens having a combined area of 360 in.2(2323 cm2) NOTE 1: A 360 in.2surface area is not mandatory. However, conducting the test in specimen sets of 10 each reduces time necessary to conduct the test. T 1014 om-10 Moisture sensitivity of fiber glass mats / 2 5.1.1 The vol
11、ume of the water bath must be at least 10 liters. When immersed, the specimens shall not be less than 2 in. (50 mm) from the bottom of the bath and must have a minimum 4 in. (102 mm) water depth above the samples. 5.2 Two sheets of copper, brass or stainless steel rigid wire cloth, with openings of
12、1/4 in. to 1/2 in. (6.4 mm to 12.7 mm). 5.2.1 The sheets shall be of sufficient size to support and restrain from floating 10 specimens, each 3 x 12 in. (76 x 305 mm) placed in a horizontal position with no overlapping, requiring a minimum 360 in.2(2323 cm2). 5.3 Paper cutter, template or sample cut
13、ting device, of suitable size to prepare specimens. The cutting apparatus should produce specimens with clean and parallel edges without distorting the specimens. 5.4 Tensile testing machine. TAPPI T 1009 “Tensile Strength and Elongation at Break.” 5.5 Flat, non-absorbent, smooth surface of sufficie
14、nt surface area to support 10 specimens, each 3 x 12 in. (76 x 305 mm) such that no two samples overlap. Minimum recommended surface area is 400 in.2(2581 cm2). 5.6 Forceps of sufficient length to retrieve the specimens from the water bath. 6. Calibration of apparatus The water bath shall be checked
15、 for temperature accuracy and uniformity using an appropriate thermometer. 7. Sampling Sample the fiber glass mat in accordance with TAPPI T 1007 “Sample Location.” 8. Test specimens and conditioning 8.1 For each principal mat direction to be tested, cut at least 20 specimens with clean and parallel
16、 edges to a length and width tolerance of 1/32 in. (0.8 mm) of the selected dimensions. Avoid abnormalities, creases, wrinkles, visible formation defects, etc. 8.2 Prior to conducting this test, condition the prepared specimens at 77 5F (25 1C) and 50 5% relative humidity for one hour. 9. Procedure
17、9.1 Immerse a 10-specimen set, placed horizontally between two sheets of wire cloth such that no two specimens overlap, in a water bath that has previously been temperature-stabilized at a temperature of 180 5F (82 3C) for 10 1/2 minutes. The enclosed specimen set should rest in the water bath in ac
18、cordance with paragraph 5.1.1. NOTE 2: With appropriate care, specimens of mat can be placed vertically in a wire mesh basket which would facilitate immersing the desired number of specimens in a water bath of different geometry to that specified. 9.2 The companion non-water-soaked 10-specimen set s
19、hall remain in the conditioned atmosphere until tested. 9.3 Remove the 10 specimens from the water bath as quickly as possible, placing them immediately on the non-absorbent, smooth, flat surface area in a horizontal plane. No two samples shall overlap. Allow the specimens to equilibrate to room tem
20、perature for at least 3 minutes before testing. 9.4 Determine tensile strength on both the water-soaked and non-water-soaked specimen sets in accordance with TAPPI T 1009 “Tensile Strength and Elongation at Break.” 10. Report 10.1 Report the average value of the breaking force for both the machine a
21、nd cross machine direction of the fiber glass mat to the nearest 0.1 lbf/3 in. (0.006 kN/m) of width, or 0.1 lbf/in. (0.02 kN/m) width. 10.2 The test report should include: 10.2.1 Test instrument used. 10.2.2 Cross head or driven clamp speed. 10.2.3 Specimen size. 10.2.4 Distance between jaws at the
22、 start of test. 3 / Moisture sensitivity of fiber glass mats T 1014 om-10 10.2.5 Number of specimen tested in each direction. 10.2.6 Standard deviation for each specimen set tested. 10.2.7 Ambient laboratory conditions: temperature and relative humidity. 11. Precision 11.1 On the basis of studies ma
23、de in accordance with TAPPI T 1200 “Interlaboratory Evaluation of Test Methods to Determine TAPPI Repeatability and Reproducibility” test results, each representing an average of 10 determinations from the same sample (commercial 2.0 lbs / 100 square feet fiberglass mat), are expected to agree withi
24、n the amounts stated below. The study included five laboratories. 11.2 Average machine direction hot wet tensile strength 65.7 lb/3in Repeatability 17 % - 11.4 lb/3in Reproducibility 18 % - 11.7 lb/3in11.3 Average cross-machine direction hot wet tensile strength: 42.3 lb/3in Repeatability 22 % - 9.1
25、 lb/3in Reproducibility 22 % - 9.1 lb/3in12. Keywords Fiber glass mats, Moisture sensitivity, Sensitivity 13. Additional information 13.1 Effective date of issue: October 6, 2010. 13.2 Optionally, a comparison between the non-water-soaked specimens and hot-water-treated specimens can be calculated as a percent of tensile strength loss as follows: Percent tensile strength loss = (A-B)/A 100 where A = non-water-soaked tensile strength B = water-soaked tensile strength Your comments and suggestions on this procedure are earnestly requested and should be sent to the TAPPI Standards Department. g
