1、METF-5Q 80 9 -( MU) 22 July 1970 MILITARY SPECIFICATION FIBER, ACRYLIC, FIBRILLATABLE 1, SCOPE 1.1 This specification covers one type of fibrillatable acrylic fiber. 2. APPLICABLE DOCUMENTS 2.1 The following documents of the issue in effect on date of invitation for bids or request for proposal form
2、 a part of this specification to the extent specified herein. STANDARDS MILITARY MIL-STD-105 - Sampling Procedures and Tables for MIL-STD-109 - Quality Assurance Terms and Definitions. MIL-STD-129 - Marking for Shipment and Storage MIL-STD-1235 - Single and Multilevel Continuous Inspection by Attrib
3、utes (ABC-STD-105). 4 Sampling Procedures and Tables for Inspection by Attributes (Copies of specifications, standards and drawings required by suppliers in connection with specific procurement functions should be .obtained from the procuring activity or as directed by the contracting officer). 2.2
4、Other publications.- The following documents form a part of this specification to the extent specified herein. Unless otherwise indicated, the issue in effect on date of invitation for bids shall apply. Paper Industry TAPPI METHOD Technical Association of the Pulp and TI002 - Drainage Time of Pulp f
5、or Insulating Board (Application for copies should be addressed to the Secretary, TAPPI, 360 Lexington Avenue, New York 17, N.Y.) FSC: 1320 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-50809 13 W 999990b 0331308 O I MIL-F-50809 (MU) i _. 3.
6、REQUIREMENTS 3.1 Materials.- The materi 1 shall be a-fibrillatabl- - gelled acrylic fiber, spun by the wet process, consisting of not less than 85% polyacrylonitrile with methyl methacrylate oopolgmer. The material shall contain no delusterants and shall ctomply with the requirements of all applicab
7、le drawlngs and speoificatlons. 3.2 Denier The den“2er af .the aei.ly3tc fiaer shal-1 be 5.4 2.0.5 when tested in accordance wit-h 4.3-.3.1. 1 3.3 Fiber length,- The fibers shall have an,=avpyge cut length of 3/8 inch, WWh the folldwing aistribution about the mean, when tested in accordafice with 4.
8、3.3.2. CELL COUNT 1/16 tb 3/16 4/16 to 9/16 10/16 to 12/16 greater than 12/16 14 .;b nk 79.5 ;min 6,O max 0.5 max 3.4 Water content.- The acrylic fiber. shall contain a minisuni of 40 percent water when tested in accordance with 4.3.3.3. 3.5 Workmanship.- The acrylic fibers shall be uniform In quali
9、ty and shall be free of impurities and other defects that aould adversely affect their we. 3.6 to a drainage rate of 12,5 4 2.5 seconds when tested in accordantar sW; submit a finst T article sample consisting of a mhbmum of 40 po-unds (oven-dry basis) of fibrillatable acrylic fiber and a tow sample
10、 (10 meters) which have been produced by the same production processes which the contractor will use in fulfilling the- contract, to a Govern- ment facility designated by the contracting officer. A similar sample shall also be submitted whenever a change occurs in the manufacturing process, material
11、 used, specification or source of supply, such as to significantly affect prodyct uniformity as determined by the Government. A change in Merge No. resulting from above changes shall necessitate resubmittal of first article samples (see 6.4). 4.2.2 4.2.3 Inspections to be. pepformed- The ma,teriaL.
12、shall :ii+ 0,001 Dry the measure6 smiles for on-ed. Weigh each cell to the nearest 0.001 gram. the weight percent of the four cells. Water content.- Transfer the wet fiber sample from the closed jar to the weighing pan of a suitably calibrated moisture determination balance. Record the weight of the
13、 wet sample to the nearest 0.1 gram, Dry the fiber sample to constant weight using the heat source provided with the balance, Record the dry weight of the sample to the nearest 0.1 gram. Calculate the moisture content of the sample to the nearest 0.5 percent. or deionized water and 2500 + 5 grams (O
14、ven-dry basis) of the fiber to a clean, 5-pound Valley Niagara type heater. Addition to the beater will require approximately one hour to maintain circulation of the mixture. After 1500 grams of the fiber have beenadded, place an 8-pound weight on the bedplate lever arm of the beater. Add a 3-pound
15、weight after addition of 2500 grams of fiber. Gradually add an additional 700 f 5 grams (oven-dry basis) of the fiber to the beater. If required to assure circulation, an aditional ten liters of distilled or deionized water may be added. This addition of fiber and wate.r may require as long as 30 mi
16、nutes to charge the entire 700 grams of fiber and still maintain stock circulation in the beater. When beater circulation is stabilized, add an additional 5-pound weight to the bedplate lever arm (total weight is now 16 pounds), Record %he tim as the start of the beating operation, Maintain the stoc
17、k temperature, throughout the beating operation, at less than 100OF. Record the stock temperature and the load on the beater motor at 1/2-hour intervals. Continue beating until the drainage rate specified is attained, as determined in accordance with TAPP1 Method T1002. Record total beating time. Mi
18、crophotographs of the fiber before and after fibrilation should appear as shown in Figures 1A and lB, respectively. Transfer a quantity of the wet fiber to (A chip is defined Calculate and report 4.4.3 4,4.4 FibrillatLon.- Gradually charge 90 liters of distilled 7 Provided by IHSNot for ResaleNo rep
19、roduction or networking permitted without license from IHS-,-,-*- . -. ._ MIL-F-50809 13 W 9999906 0331314 b MIL-F-50809 (MP) 5; PREPARATION FOR DELImRY i h-,. I 5.1 Packing 5,l.l Level C.- The product shall be packed to afford protection against damage and contamination during,direct ship- ment fro
20、m the supply source to the first receiving activity for immediate use. 5.2 Marking,- Marking shall be in accordance with MIL-STD- 129. In addition, each drum of product shall be marked with the dry weight of the contents. 64 NOTES 621 Qrdering data.- Prociiwment documents shall specify the title,tnu
21、mber, revision and date qf this specifacation ;and Merge“ Number. assigned to the inspections herein are to facil future data collection and analysis by the Government., the acrylic tow prior to cutt.ing. fiber which has been found satisfactory for the intended purpose is T-98 Cyanamide Acrylic Fibe
22、r manufactured by American Cyanamid Co., Fibers Division, Wayne, N.J. from other sources must be approved by Picatinny Arsenal, ATTN: SMPA-ND2, Dover, N.J. 07801 6.2 Inspection code numbers.- The five-digit cgde numbers 6.3 6.t4 Denier.- Samples for fiber denier shall be selected from New product ap
23、proval.- One type o$ fibrillatable acrylic Use of similar materips- Custodian: ARMY-MU Project Number: 1320-A Preparing Activity ARMY-MU 8 1 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-50809 (MU) Figure LA. Photomicrograph of Creslan T-98 before fbrillation Figure 1B. Photomicrogrph of Creslan T-98 after fibrillation e 9 & Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
