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Hermetic seal

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125: 291:, and are used in the manufacture of hermetic electrical and fiber optic hermetic seals. Epoxy-based seals can increase signal density within a feedthrough design compared to other technologies with minimal spacing requirements between electrical conductors. Epoxy hermetic seal designs can be used in hermetic seal applications for low or high vacuum or pressures, effectively sealing gases or fluids including helium gas to very low helium gas leak rates similar to glass or ceramic. Hermetic epoxy seals also offer the design flexibility of sealing either copper alloy wires or pins instead of the much less electrically conductive 362: 325: 317: 443:. For these reasons, it is advisable to apply a light ring of grease at the fat end of the taper and not its tip, to keep it from going inside the glassware. If the grease smears over the entire taper surface on mating, too much was used. Using greases specifically designed for this purpose is also a good idea, as these are often better at sealing under vacuum, thicker and so less likely to flow out of the taper, become fluidic at higher temperatures than 300: 2388: 400: 280:(-OH) groups along their chain that can form bonds or strong polar attractions to oxide or hydroxyl surfaces. Most inorganic surfaces—i.e., metals, minerals, glasses, ceramics—have polarity so they have high surface energy. The important factor in determining good adhesive strength is whether the surface energy of the substrate is close to or higher than the surface energy of the cured adhesive. 312:
When the glass and the metal being hermetically sealed have the same coefficient of thermal expansion, a "matched seal" derives its strength from bond between the glass and the metal's oxide. This type of glass-to-metal hermetic seal is generally used for low-intensity applications such as in light
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Compared to epoxy hermetic seals, glass-to-metal seals can be operated up to much higher temperatures (250 Â°C for compression seals, 450 Â°C for matched seals). The material selection is however more limited due to thermal expansion constraints. The sealing process is performed at roughly
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made for this application can be applied to the ground glass surfaces to be connected, and the inner joint is inserted into the outer joint such that the ground glass surfaces of each are next to each other to make the connection. In addition to making a leak-tight connection, the grease lets two
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seals are an alternative to glass. Ceramic seals exceed the design barriers of glass to metal seals due to superior hermetic performance in high stress environments requiring a robust seal. Choosing between glass versus ceramic depends on the application, weight, thermal solution and material
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pin materials required in glass or ceramic hermetic seals. With a typical operating temperature range of −70 Â°C to +125 Â°C or 150 Â°C, epoxy hermetic seals are more limited in comparison to glass or ceramic seals, although some hermetic epoxy designs are capable of withstanding
332:"Compression seals" occur when the glass and the metal have different coefficients of thermal expansion such that the metal compresses around the solidified glass as it cools. Compression seals can withstand very high pressure and are used in a variety of industrial applications. 483:-based greases are quite impervious to organic solvents. Most chemists simply wipe them off as much as possible. Some fluorinated solvents can remove fluoroether greases, but are costlier than laboratory solvents. 455:
Ground glass joints are translucent when clean and free of debris. Solvents, reaction mixtures and old grease appear as transparent spots. Grease can be removed by wiping with an appropriate solvent;
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must maintain a seal against the flow of gases, for example, packaging for some foods, pharmaceuticals, chemicals and consumer goods. The term can describe the result of some
84:. Hermetic seals are essential to the correct and safe functionality of many electronic and healthcare products. Used technically, it is stated in conjunction with a specific 385:, PTFE resin string, and wax are other alternatives that are finding widespread use, but require a little care when winding onto the joint to ensure a good seal is produced. 735:
Haiduc, I., "Silicone Grease: A Serendipitous Reagent for the Synthesis of Exotic Molecular and Supramolecular Compounds", Organometallics 2004, volume 23, pp. 3–8.
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and their processes can create a hermetic bond to copper, brass, stainless steel, specialty alloys, plastic, or epoxy itself with similar
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A taper-joint stopper with PTFE Sealing Ring. Optical transparency of the narrow sealing ring pressured by glass joint (right).
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In the funeral industry, some caskets and burial vaults are hermetically sealed by a rubber seal and being locked.
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and conditions of use. Colloquially, the exact requirements of such a seal varies with the application.
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and exterior construction projects, airtight seals may be used to protect general services and
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joints be later separated more easily. A potential drawback of such grease is that if used on
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Lucian C. Pop and M. Saito (2015). "Serendipitous Reactions Involving a Silicone Grease".
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sealing rings (high vacuum tight, air leakage rate 10 mBar Ă— L/sec and below),
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Loughborough Glass Co., Ltd. (1957). "Sleeves to replace grease in ground glass joints".
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1000 Â°C in an inert or reducing atmosphere to prevent discoloration of the parts.
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supposedly invented the process of making a glass tube airtight using a secret seal.
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is used to lubricate glass stopcocks and joints. Some laboratories fill them into
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electrical connections/splices. Airtight implies both waterproof and vapor-proof.
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In 2003, they were moved to new glass cases hermetically sealed with argon.
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may include windows that combine triple-pane insulated glazing with
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and foreign bodies to maintain proper functioning and reliability.
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Hermetic compressor feedthrough – glass-to-metal compression seal
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for a long time in high-temperature applications (such as for
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Standard test methods are available for measuring the
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Hermetic sealing for airtight conditions is used in
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Interactive Learning Paradigms Inc. 7: 1289:Flexible intermediate bulk container 2273:Vertical form fill sealing machine 41:For other uses of "hermetic", see 25: 2243:Rotary wheel blow molding systems 1091:Purdue Improved Crop Storage bags 688:Journal of Scientific Instruments 289:coefficients of thermal expansion 257:gas in glass cases housed in the 2387: 2386: 2213:Mechanical brake stretch wrapper 537:Moisture vapor transmission rate 493:moisture vapor transmission rate 328:Glass-to-metal compression seals 247:U.S. Declaration of Independence 1947:Electronic article surveillance 1801:Shock and vibration data logger 1646:Linear low-density polyethylene 340:Ceramic-to-metal hermetic seals 2052:Radio-frequency identification 754:Coordination Chemistry Reviews 253:were hermetically sealed with 1: 2163:Extended core stretch wrapper 1116:Single-serve coffee container 557:"Online Etymology Dictionary" 272:Types of epoxy hermetic seals 171:Some buildings designed with 128:A hermetically sealed battery 104:. A hermetic seal comes from 1319:Insulated shipping container 303:Matched glass-to-metal seals 2208:Material-handling equipment 2092:Verification and validation 1324:Intermediate bulk container 1106:Self-heating food packaging 164:foils, and gas impermeable 60:(preventing the passage of 2433: 1851:Time temperature indicator 708:10.1088/0950-7671/34/1/429 392: 276:Typical epoxy resins have 56:that makes a given object 40: 29: 2384: 2306:Environmental engineering 2268:Turntable stretch wrapper 2198:Lineshaft roller conveyor 2188:Injection molding machine 1126:Toothpaste pump dispenser 986:Disposable food packaging 828:Child-resistant packaging 766:10.1016/j.ccr.2015.07.005 721:Rob Toreki (2006-12-30). 212:semiconductor electronics 100:comes from the Greek god 36:Airtight (disambiguation) 2193:Label printer applicator 2062:Shearing (manufacturing) 1661:Low-density polyethylene 1081:Pharmaceutical packaging 1051:Low plastic water bottle 941:Alternative wine closure 497:oxygen transmission rate 173:sustainable architecture 2223:Orbital stretch wrapper 1846:Temperature data logger 1766:Pressure-sensitive tape 1626:Humidity indicator card 1154:Aerosol spray dispenser 600:Douglas Electrical Corp 433:continuous distillation 1942:Die forming (plastics) 1651:Liquid packaging board 1354:Multilayered packaging 1086:Plastic milk container 1066:Optical disc packaging 419: 366: 329: 321: 304: 259:U.S. National Archives 129: 34:. For other uses, see 2371:Sustainable packaging 2321:Life-cycle assessment 2301:Closed-loop box reuse 2248:Seed-counting machine 1581:Corrugated fiberboard 1531:Biodegradable plastic 1254:Corrugated box design 908:Sustainable packaging 898:Shelf-ready packaging 873:Packaging engineering 402: 364: 327: 319: 302: 127: 2341:PET bottle recycling 2203:Logistics automation 1731:Plastic-coated paper 878:Resealable packaging 429:laboratory glassware 193:thermal conductivity 108:in the tradition of 2417:Hermes Trismegistus 2393:Category: Packaging 2228:Packaging machinery 2037:Product development 1836:Tamper-evident band 1676:Modified atmosphere 1016:Foam food container 700:1957JScI...34...38L 522:Glass-to-metal seal 517:Building insulation 251:U.S. Bill of Rights 140:practices, such as 114:Hermes Trismegistus 2412:Seals (mechanical) 2356:Reusable packaging 2316:Industrial ecology 2077:Ultrasonic welding 2042:Production control 1992:Injection moulding 1877:Aseptic processing 1586:Corrugated plastic 1456:Steel and tin cans 1426:Shipping container 1364:Packet (container) 1101:Seasonal packaging 1001:Evidence packaging 981:Currency packaging 976:Cosmetic packaging 883:Reusable packaging 723:"Glassware Joints" 561:www.etymonline.com 461:methylene chloride 420: 367: 330: 322: 305: 205:landscape lighting 152:materials include 130: 2399: 2398: 2361:Reverse logistics 2346:Plastic recycling 2218:Multihead weigher 2138:Cartoning machine 2133:Cap torque tester 2047:Quality assurance 2022:Plastic extrusion 1987:Induction sealing 1957:Extrusion coating 1816:Staple (fastener) 1786:Security printing 1621:Hot-melt adhesive 1194:Biodegradable bag 1036:Glass milk bottle 918:Tamper resistance 858:Package pilferage 833:Contract packager 741:10.1021/om034176w 352:Glassware sealing 243:U.S. Constitution 138:food preservation 16:(Redirected from 2424: 2390: 2389: 2376:Waste management 2366:Source reduction 2183:Industrial robot 2087:Vacuum packaging 2012:Package tracking 1967:Glass production 1927:Corona treatment 1917:Containerization 1781:Screw cap (wine) 1696:Oxygen scavenger 1159:Aluminium bottle 1111:Screw cap (wine) 1056:Luxury packaging 888:Reuse of bottles 853:Package delivery 838:Edible packaging 823:Active packaging 800: 793: 786: 777: 770: 769: 749: 743: 733: 727: 726: 718: 712: 711: 683: 677: 664: 658: 657: 655: 654: 640: 634: 633: 631: 630: 616: 610: 609: 607: 606: 592: 586: 585: 583: 582: 571: 565: 564: 553: 479:-based greases. 422:A thin layer of 345:Co-fired ceramic 278:pendant hydroxyl 263:Washington, D.C. 112:. The legendary 74:glass containers 21: 2432: 2431: 2427: 2426: 2425: 2423: 2422: 2421: 2402: 2401: 2400: 2395: 2380: 2336:Paper recycling 2331:Packaging waste 2311:Glass recycling 2283: 2277: 2233:Pallet inverter 2153:Conveyor system 2108:Barcode printer 2096: 2072:Track and trace 2027:Plastic welding 1962:Flame treatment 1932:Curtain coating 1865: 1686:Nonwoven fabric 1671:Metallised film 1576:Container glass 1503: 1501: 1495: 1471:Tub (container) 1369:Padded envelope 1140: 966:Case-ready meat 933: 927: 863:Package testing 815: 809: 804: 774: 773: 751: 750: 746: 734: 730: 720: 719: 715: 685: 684: 680: 665: 661: 652: 650: 642: 641: 637: 628: 626: 624:Elan Technology 618: 617: 613: 604: 602: 594: 593: 589: 580: 578: 573: 572: 568: 555: 554: 550: 545: 513: 489: 453: 397: 391: 359: 354: 342: 310: 274: 220:optical devices 181:Green buildings 177:conserve energy 122: 94: 52:is any type of 46: 39: 28: 23: 22: 15: 12: 11: 5: 2430: 2428: 2420: 2419: 2414: 2404: 2403: 2397: 2396: 2385: 2382: 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1577: 1574: 1572: 1569: 1567: 1564: 1562: 1559: 1557: 1554: 1552: 1549: 1547: 1544: 1542: 1539: 1537: 1534: 1532: 1529: 1527: 1524: 1522: 1519: 1517: 1514: 1512: 1509: 1508: 1506: 1498: 1492: 1489: 1487: 1484: 1482: 1479: 1477: 1474: 1472: 1469: 1467: 1464: 1462: 1459: 1457: 1454: 1452: 1449: 1447: 1444: 1442: 1439: 1437: 1434: 1432: 1431:Shipping tube 1429: 1427: 1424: 1422: 1419: 1415: 1412: 1411: 1410: 1407: 1405: 1402: 1400: 1397: 1395: 1392: 1390: 1387: 1385: 1382: 1380: 1377: 1375: 1372: 1370: 1367: 1365: 1362: 1360: 1357: 1355: 1352: 1350: 1347: 1345: 1342: 1340: 1337: 1335: 1332: 1330: 1327: 1325: 1322: 1320: 1317: 1315: 1312: 1310: 1307: 1305: 1302: 1300: 1297: 1295: 1294:Flexible tank 1292: 1290: 1287: 1285: 1282: 1280: 1277: 1275: 1272: 1270: 1267: 1265: 1262: 1260: 1257: 1255: 1252: 1250: 1247: 1245: 1242: 1240: 1237: 1235: 1232: 1230: 1227: 1225: 1222: 1220: 1217: 1215: 1212: 1210: 1207: 1205: 1202: 1200: 1197: 1195: 1192: 1190: 1187: 1185: 1182: 1180: 1177: 1175: 1172: 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625: 621: 615: 612: 601: 597: 591: 588: 576: 570: 567: 562: 558: 552: 549: 542: 538: 535: 533: 530: 528: 525: 523: 520: 518: 515: 514: 510: 508: 506: 502: 498: 494: 486: 484: 482: 478: 474: 470: 466: 465:ethyl acetate 462: 458: 450: 448: 446: 442: 438: 434: 430: 425: 417: 413: 409: 405: 401: 396: 388: 386: 384: 380: 376: 372: 363: 356: 351: 349: 346: 339: 337: 333: 326: 318: 314: 307: 301: 297: 296:200 Â°C. 294: 290: 286: 281: 279: 271: 269: 266: 264: 260: 256: 252: 248: 244: 240: 235: 233: 229: 225: 221: 217: 213: 208: 206: 202: 198: 195:and increase 194: 190: 186: 182: 178: 174: 169: 167: 163: 159: 158:aluminum cans 155: 151: 147: 143: 139: 135: 126: 119: 117: 115: 111: 107: 103: 99: 91: 89: 87: 83: 79: 75: 71: 67: 63: 59: 55: 51: 50:hermetic seal 44: 37: 33: 27:Airtight seal 19: 2282:Environment, 1981: 1897:Blow molding 1826:Stretch wrap 1756:Polyethylene 1746:Plastic wrap 1736:Plastic film 1721:Paper pallet 1656:Living hinge 1561:Coated paper 1441:Spray bottle 1421:Security bag 1414:Water sachet 1404:Salvage drum 1399:Retort pouch 1304:Glass bottle 1199:Blister pack 1164:Aluminum can 1131:Water bottle 1031:Gas cylinder 1006:Field ration 903:Shelf-stable 757: 753: 747: 731: 716: 691: 687: 681: 673: 670: 662: 651:. Retrieved 648:Dietze Group 647: 638: 627:. Retrieved 623: 614: 603:. Retrieved 599: 590: 579:. Retrieved 577:. 2001-06-25 569: 560: 551: 501:glass bottle 490: 454: 421: 368: 343: 334: 331: 313:bulb bases. 311: 285:epoxy resins 282: 275: 267: 236: 209: 170: 131: 97: 95: 57: 49: 47: 2178:Heat sealer 2143:Case sealer 2017:Papermaking 1937:Die cutting 1902:Calendering 1806:Shrink wrap 1681:Molded pulp 1666:Meat diaper 1631:Kraft paper 1611:Foam peanut 1601:Double seam 1571:Coextrusion 1541:Bubble wrap 1521:Bail handle 1466:Thermal bag 1389:Plastic bag 1204:Boil-in-bag 1136:Wine bottle 1121:Spray paint 1076:Popcorn bag 1071:Oyster pail 956:Beer bottle 676:(2): 29–33. 527:Heat sealer 481:Fluoroether 477:hydrocarbon 416:Dow Corning 232:water vapor 216:thermostats 110:Hermeticism 86:test method 68:, or other 2406:Categories 2258:Staple gun 2238:Palletizer 2128:Can seamer 1997:Lamination 1922:Converting 1811:Slip sheet 1726:Paperboard 1591:Cushioning 1551:Cellophane 1526:Bioplastic 1504:components 1491:Wooden box 1461:Tetra Brik 1384:Paper sack 1359:Multi-pack 1309:Gunny sack 1179:Bag-in-box 1146:Containers 1011:Flour sack 996:Egg carton 971:Coffee bag 951:Banana box 893:Shelf life 653:2019-07-01 629:2015-12-03 605:2021-12-23 581:2015-11-07 532:Permeation 197:efficiency 2351:Recycling 2158:Drum pump 2101:Machinery 1952:Extrusion 1870:Processes 1841:Tear tape 1831:Susceptor 1821:Strapping 1776:Screw cap 1751:Polyester 1596:Desiccant 1500:Materials 1481:Unit load 1436:Skin pack 1379:Paper bag 1249:Clamshell 991:Drink can 923:Wrap rage 807:Packaging 760:: 64–70. 694:(1): 38. 505:screw cap 383:PTFE tape 239:archiving 201:landscape 150:Packaging 134:packaging 96:The word 92:Etymology 2284:post-use 2173:Heat gun 2123:Calender 2032:Printing 1861:Velostat 1856:Tinplate 1691:Overwrap 1616:Gel pack 1606:Flip-top 1511:Adhesive 1446:Squround 1349:Mesh bag 1334:Jerrycan 1279:Envelope 1219:Bulk box 1096:Sand bag 1061:Milk bag 1046:Juicebox 961:Box wine 934:packages 511:See also 473:silicone 451:Cleaning 445:Vaseline 437:reagents 408:syringes 283:Certain 228:switches 166:plastics 98:hermetic 82:plastics 58:airtight 43:Hermetic 18:Airtight 2007:Molding 1912:Coating 1907:Canning 1566:Coating 1556:Closure 1314:Inhaler 1169:Ampoule 1041:Growler 932:Product 814:General 696:Bibcode 487:Testing 469:hexanes 375:o-rings 189:krypton 146:canning 106:alchemy 54:sealing 2391:  2326:Litter 2168:Filler 1711:Pallet 1409:Sachet 1274:Endcap 1239:Carton 1234:Carboy 1209:Bottle 1189:Barrel 816:topics 475:- and 457:ethers 441:vacuum 424:grease 412:Krytox 404:Grease 389:Grease 379:grease 255:helium 249:, and 226:, and 102:Hermes 78:rubber 66:oxygen 1716:Paper 1636:Label 1536:BoPET 1259:Crate 543:Notes 467:, or 293:Kovar 199:. In 185:argon 162:metal 154:glass 70:gases 1546:Bung 1486:Vial 1476:Tube 1374:Pail 1269:Drum 1244:Chub 1229:Case 1224:Cage 371:PTFE 224:MEMS 144:and 120:Uses 80:and 1641:Lid 1502:and 1344:Keg 1339:Jug 1329:Jar 1214:Box 1184:Bag 762:doi 758:314 737:doi 704:doi 261:in 187:or 62:air 2408:: 756:. 702:. 692:34 690:. 674:48 646:. 622:. 598:. 559:. 495:, 463:, 459:, 245:, 222:, 218:, 214:, 179:. 168:. 160:, 156:, 148:. 64:, 48:A 799:e 792:t 785:v 768:. 764:: 739:: 710:. 706:: 698:: 656:. 632:. 608:. 584:. 563:. 418:. 45:. 38:. 20:)

Index

Airtight
Vacuum packing
Airtight (disambiguation)
Hermetic
sealing
air
oxygen
gases
glass containers
rubber
plastics
test method
Hermes
alchemy
Hermeticism
Hermes Trismegistus

packaging
food preservation
vacuum packing
canning
Packaging
glass
aluminum cans
metal
plastics
sustainable architecture
conserve energy
Green buildings
argon

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