1、i- /J-Ql-E M IL-S- 24 16 7A (SIIIPS ) 6 December 1972- SUPERSEDING MIL-S-2 4 167-(SHIPS 1 31 August 1965 (See 6,7) MILITARY SPEC IF I CAT I OM SYNTACTIC MATERIAL, RIGID, POUR-IN-PLACE, STRUCTURAL VOID FILLING 1. SCOPE 1.1 resin system. This specification covers the requirements for a pour-in-place,
2、rigid cellular 2. APPLICABLE DOCUMENTS 2.1 The following documents of the issue in effect on date of invitation for bids or request for proposal, form a part of the specification to the extent specified herein. STANDARDS MILITARY MIL-STD-105 - Sampling Procedures and Tables for Tnspection by Attribu
3、tes. # MIL-STD-120 - Marking for Shipment and Storage. (Copies of specifications, standards, drawings, and publications required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) to the extzp-in.
4、of invitation for bids or request for proposal shall apply. # 2.2 Other ublications. The following documents form a part of this specification Unless otherwise indicated, the issue in effect on date UNIFORM CLASS IF I CATION COMMITTEE Uniform Freight Classification Rules. (Application for copies sho
5、uld be addressed to the Uniform Classification Committee, Room 1106; 222 South Riverside Plaza, Chicago, Illinois 60606.) NATIONAL MOTOR FREIGHT TRAFFIC ASSOCIATION, INC., AGENT National Motor Freight Classification. Traffic Order Section, 1616 P Street, N.W., Washingtbn, D.C. 20036.) (Application f
6、or copies should be addressed to the American Trucking Association Inc., AYERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) D1621-64 - Test for Compressive Strength of Rigid Cellular Plastics. (Application for copies should be addressed to the American Society for Testing and (Technical society and t
7、echnical association specifications and standards are gener- Materials, 1916 Race Street, Philadelphia, Pa. 19103.) ally available for reference from libraries. groups and using Federal agencies.) They are also distributed among technical I 3. REQUIREMENTS 3.1 Sample for first article ins ection. Pr
8、ior to beginning production a sample shall be tested as specified in 4.-h. # 3.2 Material. The syntactic,material shall consist of a polyester resin filled with low density hollow phenolic microdpheres or hollow glass microspheres and hardened with a curing agent. When mixed in accordanch with the i
9、nstructions supplied by the contractor, the ingredients shall form a pourable material which after curing shall be a rigid cellular system suitable for use in buoyancy and structural void filling applications. The material shall air-cure at ambient temperatures and attain the physical properties f?
10、described herein within 7 days after mixing. % c i Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-, MIL-S-2qLh7A 73 9977906 OLL8509 m Application li fe- Cure time Peak exotherm Shrinkage MIL-S-24167A (SIIIPS) 1 . ,. . . . . . 4.7.3.2 1 hour- *I 4.7.
11、3.3 7 days fifaximum 4.7.3.4 3DO“F. Maximum 4.7.3.5 1.0 percent Maximum 3.3 Iioniogcnei ty . 3.3.1 The freshly mixed material shall be homogencous and free from lumps and coarse particles. 3.3.2 Sin le ours. The cure material shall be homogeneous throughout with uniform cells. Ther-silarlko void ope
12、nings, cracks, or any other occlusions, when measured as specified in 4.7.2.1. uniformity speci _?% le pfls.r3mhe fusioni zes (inches) 4 by 4 by 4 4 by 4 by 4 4 by 4 by 4 4 by 4 by 4 4 by 4 by 4 4 by 4 by 1 4 by 4 by 4 4 by 4 by 4 4 by 4 by 4 inch on a side. 4.1 Responsibility for inspection. Unless
13、 otherwise specified in the contract or Except as otherwise specified in the contract or order, the purchase order, the supplE 1s responsible for the performance of all inspection require- ments as specified herein. supplier may use his own or any other facilities suitable for the performance of thc
14、 inspection requirements specified herein, unless disapproved by the Government. ment reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prc- scribed requirements. The Govern- 4.2
15、First article ins ection. First article inspection shall consist of the examina- tion and tests specified * in 4.3 Sampling. # 4.3.1 Ins ection lot. For purposes of sampling, a lot of syntactic material shall be that quantit-nT compounded by mixing (a) hollow phenolic microspheres o; !. : :(-.I qlas
16、s nicrsi.kr diich have been produced in one batch with (b) polyester resin which has been produced in a single batch, (c) curing agent which has been produced in a single batch and (d) silicone surfactant which has also been produced in a single batch. The suppliers of each of these materials shall
17、have applied or affixed identification on each container so that the foregoing lot requirement can be met. 4.3.2 Sam lin for ualit conformance tests. Samples for quality conformance tests specified in dkdleed in accordance with table III. Provided by IHSNot for ResaleNo reproduction or networking pe
18、rmitted without license from IHS-,-,-MIL-S-24L67A 73 7779706 OlL5ll b M MIL-S-24167A (SHIPS) 4.4 Examination of filled containers. A random sample of filled containers containing syntactic foam ingredients shall be taken from each lot in accordance with MIL-STD-105 at inspection level I and acceptab
19、le quality level = 2.5 parcent defective, to verify compli- ance with this specification in regard to fill, closure, marking, and other requirements not involving tests. and the closure, for evidence of leakage, and for unsatisfactory markings. Each sample filled container shall be weighed to determ
20、ine the amount of contents. Any containers in the sample having one or more defects, or under required fill, shall not be offered for delivery. If the number of defective containers in any sample exceeds the acceptance number of the appropriate sampling plan of MIL-STD-105, this shall be cause for r
21、ejection of the lot representea by the sample. Containers shall be examined for defects of construction of the container 4.5 Quality conformance tests. Quality conformance tests shall consist of the following tests: Examination of product for homogeneity (single pour only) (see 4.7.1). Density varia
22、tion (see 4.7.2.1). Density (see 4.7.2.2). Application life (see 4.7.3.2). Cure time (see 4.7.3.3). Compressive yield strength 0.2 percent offset dry and wet (see 4.7.4.1). Modulus of elasticity in compression (see 4.7.4.2). compression set (see 4.7.4.3). Water absorption (24-hour immersion only) (s
23、ee 4.7.4.5). impact resistance (see 4.7.4.4) . The test blocks, selected as specified in 4.3.2, shall be subjected separately to the above tests as specified under 4.7. If any test block fails one or more of these tests, the lot shall not be offered for delivery. 4.5.1 In addition, the product shall
24、 be subject to any of the other tests specified herein which the procuring activity considers necessary to determine conformance with the requirements of this specification. 4.6 Tect conditions. 4.6.1 Atmospheric test conditions. Unless otherwise specified (see 6.2), the atmo- spheric conditions sur
25、rounding the specimen prior to and during test shall be 73.5 + 1.8F. (23 1C.) and 50 2 percent relative humidity. The conditioning period prior totest shall be a minimum of 24 hours. The temperature, the relative humidity, and the period of time for conditioning shall be recorded for each test. 4.6.
26、2 Test block preparation. 4.6.2.1 Single pour test blocks. 4.6.2.1.1 Mold. The mold shall be 1/4-inch thick steel, Teflon coated with inside The mold shall consist of four solid dimensions of 13Zhes by 13 inches by 13 inches. sjdes and a solid bottom with the top left open to allow pouring of the sy
27、ntactic material into the mold. The sides and bottom shall be so constructed that the mold can be dis- assembled to allow removal of the specimen from the mold. 4.6.2.1.2 Moldin of the test block. The base ingredients shall be mixed in the proportions spec1 + ied in the powter resin suppliers instru
28、ction sheet. A total amount of base material which will fill the mold specified in 4.6.1 shall be mixed in accordance with the suppliers instructions and poured into the mold. The amount of material mixed shall include a 10 percent excess to cover material remaining on the mixer blades and in the mi
29、xing vessel. The syntactic material shall be allowed to cure at room temperature in the mold for 48 hours before testing. The mixing and curing characteristics of the syntactic material shall be determined during the8reparation of the test block. re aration. *The test block of syntactic material sha
30、ll be examined, ewighed and measured-k shall then be cut into test specimens in accord- ance with 4.7. The test specimens shall be machined to assure accuracy of dimensions. first article inspection onTy. gallon container-ing the approximate dimensions of 1-7/8 feet in diameter bv 2-3/4 feet in heig
31、ht. 4 I 4.6.2.1.3 Test specimen 4.6.2.2 Preparation of the multiple pour specimen. Multiple pour is applicable for 4.6.2.2.1 Mold. The mold for the multiple pour specimen shall be an open head 55- .- , Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
32、IlIL-S-24167A (SlIIPS) 4.6.2.2.2 Moldin of the multi le pour s ecimen. Three separatc pourings of syn- tactic material deyaKt;prsximately 1 inch of water in th: bottom, t!.t raz:. !-i- ;(-%:- tioned at least 1 inch above the water. The top of the container shall be equipped with a 1-inch diameter ho
33、le for the insertion of a stirring rod. The container shall be placed in an air-circulating oven maintained at 158 2 1.8OF. A suitable air- stirring device shall be inserted through the top of thecontainer and operated for the first 4 to 6 hours of the exposure to obtain a water vapor saturated atmo
34、sphere within the container, If addition of water is required, it should be preheated to 160OF. After 7 days, the specimen shall be removed from the container, dried for 30 minutes at 158O + 1.8OF. (70 + 1C.) and allowed to recover at 77O 2 1.8OF. and 50 percent R.H. cornpressive yield strength as s
35、pecified in 4.7.4.1.1 (first article only). sion is the ramstress to straiihic portion of the curve and shall be calculated from the load deformation curve of 4.7.4.1.1 after hydrostatic exposure to 4.7.4.1.2. The specimen shall be placed on a perforated rack in a (70 + 1C) for 7 days. The water lev
36、el shoid-be checked periodically throughout the exposure. The specimn shall be tezted for The niodulus of elasticity in compres- 4.7.4.2 Modulus of elasticity in com ression. 4.7.4.3 Com ression set after static loadin . The test specimen shall be cut to the dimensions spebam TIfFQmtdck molded in ac
37、cordance with 4.6.2.1.2, The specimen-shall be tested in atdhpression testing machine as specified in ASTi.1 D1621-64. The load shall be applied to the test specimen at the rate of 0.1 inch/ninute and held for 4 hours. The specimens shall be place under a load of 1000 p.s,i. The specimen shall then
38、be removed from the testing machine and allowed to recovcr for 30 minutes, before measuring final thickness. Set, expressed in inch/inch, is the difference between the initial and final thickness divided by the initial thickness (all measurements to the nearest 0.01 inch). 4.7.4.4 Im act test. The t
39、est specimen for the impact test shall be cut to the dimensions speci -h ie Rable II from the test block molded in accordance with 4.6.2.1.2. 6 I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-24 1G7A (SIIIPS) 4.7.4.4.1 Apparatus. The impact t
40、esting apparatus shall be constructed in accordqnce with figure 1. 4.7.4.4.2 Proceure. A 5- und steel ball held by an electromagnet sliu11 bu dropped The licight of drop onto the center of the test specimen starting from a height of 1 foot. shall be increased by 6-inch increments and the test shall
41、be repeated until the test specimen fails. specimen. cut to the dimens?ons as specified in table II from the test block molded in accordance with 4.6.2.1.2. The specimen shall be completely immersed in tap water (temperature 65O - 95F.I for 5 seconds, removed, and allowed to drain for 10 seconds in
42、still air by holding the specimen by one corner with the opposite corner vertically downward. weighed to the nearest 0.1 gram and then subjected to the hydrostatic test of 4.7.4.1.2. After 24 hours remove the specimen from the test apparatus and drain and weigh it in the same manner in which the ini
43、tial weight was obtained. initial weight shall be the water pick-up of the specimen. as percentage of the initial weight, Continue procedure using same specimen for a 7-day immersion period (7-day immersion test for fi-rst article only). 30-day immersion period (30-day immersion test only for micros
44、pheres and resin not previously tested) . The impact strength is the number of foot pounds required to break the test 4.7.4.5 Water absorption. The test specimen for the water absorption test shall be The specimen shall be The difference between the final and Calculate the water absorption Continue
45、procedure for a 4.8 Ins ection of re aration for deliver . Thc packaging, packing, and marking shall be examine-lGn-tE ds specification. 5. PREPARATION FOR DELIVERY . (The preparation for delivery requirements specified herein apply only for direct Government procurements.) 5.1 Packaging and packing
46、. 5.1.1 Level C. Material components, in the quantity specified (see 6.2 and 6.41, or a mock up section ;here specified (see 6.2 and 6.3) shall be packaged or packed in containers that will assure protection against deterioration, loss of contents,.and physical damage during shipment from the supply
47、 source to the first receiving activity for immediate use. Packing (shipping containers) shall be acceptable to the common carrier which will insure safe delivery at destination in a satisfactory condition at the lowest applicable rate. Containers, packing, or method of shipment shall comply with Un
48、iform Freight or National blotor Freight Classification Rules or Regulations or other carrier rules as applicable to the mode of transportation. 5.2 Elarkin . In addition to any special marking required by the contract or orer, interior pac + ages and exterior shipping containers shall be marked in
49、accordance with MIL- STD-129 and shall include shelf life and hazardous material markings as applicable. 6. :IOTES 6.1 Intended use. The syntactic material covered by this specification is intended 6.2 Ordering e. Procurement documents should specify the following: for use in structurrvoid filling applications. - (a) Title, number, and date of this specification. (b) (c) Mock-up requirements (see 5.1.1 and 6.3). (d) Quantity of material rcquired (see 5.1.1). (e) Handl
