1\u3001Product Overview<\/strong><\/p>\n\n\n\n The Leak and Seal Strength Tester MF-700D<\/strong> is suitable for the quantitative determination of the seal strength of each sealed edge, the heat-sealing quality, the burst pressure of a whole bag, gross leaks by the internal-pressure method and the sealing performance of flexible packaging bags formed by various heat-sealing and adhesive processes, as well as composite sterile medical-device packaging bags under YY\/T 0681. It also provides quantitative determination of the overall sealing performance, pressure resistance, cap-body connection strength, pull-off strength, heat-sealed-edge seal strength and butting strength of GB 17876 plastic tamper-evident bottle caps and tubes.<\/p>\n\n\n\n 2\u3001Application Fields<\/strong><\/p>\n\n\n\n 3\u3001Testing Principle<\/strong><\/p>\n\n\n\n The Leak and Seal Strength Tester MF-700D<\/strong> operates on the positive-pressure principle and offers three selectable test modes.<\/p>\n\n\n\n A. Burst Test:<\/strong> A specified amount of gas is injected into the test specimen, and the maximum pressure it withstands before bursting is measured.<\/p>\n\n\n\n B. Creep: <\/strong>The specimen is pressurized to 70% of that maximum pressure and held for a specified period, during which any change in pressure is observed.<\/p>\n\n\n\n C. Creep-to-Burst: <\/strong>The specimen is pressurized to 90% of the maximum pressure, and the time taken for it to burst is recorded.<\/p>\n\n\n\n Standards:<\/strong> ASTM F1140, ASTM F2054, ISO 11607-1, ISO 11607-2, GB 10440, GB 18454, GB 19741, GB 17447\uff0cGB\/T 17876, GB\/T 10004, GB\/T 10005, GB\/T 17590, BB\/T 0003, BB\/T 0025, QB\/T 1871, YY\/T 0681, YBB 00252005, YBB 00162002<\/p>\n\n\n\n 4\u3001Key Features<\/strong><\/p>\n\n\n\n \u2605 One-Touch Intelligent Control<\/strong><\/p>\n\n\n\n Intelligent control of pressurization, pressure holding, timing and pressure release; the entire test process is completed with one-touch operation for high testing efficiency.<\/p>\n\n\n\n \u2605 Selectable Test Ranges<\/strong><\/p>\n\n\n\n Selectable test ranges provide a wide measuring span and a broad range of applications.<\/p>\n\n\n\n \u2605 Dual Test Methods<\/strong><\/strong><\/p>\n\n\n\n Two test methods are available: restrained and unrestrained expansion.<\/p>\n\n\n\n \u2605 Flexible Test Modes<\/strong><\/p>\n\n\n\n Full support for test accessories, flexible test modes and diversified compatibility.<\/p>\n\n\n\n \u2605 Imported SMC Pneumatic Components<\/strong><\/p>\n\n\n\n Equipped with pneumatic components imported from SMC, a world-renowned brand, delivering durable, stable and reliable performance.<\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n 5\u3001Technical Specifications<\/strong><\/p>\n\n\n\n <\/p>\n","protected":false},"excerpt":{"rendered":" Leak and Seal Strength Tester MF-700D 1\u3001Product Overvie […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-238","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/packagingleaktester.com\/index.php\/wp-json\/wp\/v2\/pages\/238","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/packagingleaktester.com\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/packagingleaktester.com\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/packagingleaktester.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/packagingleaktester.com\/index.php\/wp-json\/wp\/v2\/comments?post=238"}],"version-history":[{"count":6,"href":"https:\/\/packagingleaktester.com\/index.php\/wp-json\/wp\/v2\/pages\/238\/revisions"}],"predecessor-version":[{"id":251,"href":"https:\/\/packagingleaktester.com\/index.php\/wp-json\/wp\/v2\/pages\/238\/revisions\/251"}],"wp:attachment":[{"href":"https:\/\/packagingleaktester.com\/index.php\/wp-json\/wp\/v2\/media?parent=238"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![\"\"](\"http:\/\/packagingleaktester.com\/wp-content\/uploads\/2026\/10\/LSST01.jpg\")
<\/figure>\n\n\n\nBasic Applications<\/strong><\/td><\/tr> Plastic Composite Bags<\/strong>
Tests the compression resistance of various plastic films, aluminum films, paper-plastic composite films, aluminum-plastic composite films and other packaging bags.<\/td><\/tr>Flexible Tubes<\/strong>
Covers various flexible tubes used in daily chemical products and other industries, e.g. flexible tubes of toothpaste, face cream, cosmetics, pharmaceutics and food.<\/td><\/tr>Creep Test<\/strong> & Creep to Failure Test<\/strong>
Covers various packaging bags and boxes.<\/td><\/tr>Extended Applications<\/strong><\/td><\/tr> Burst Test of Blister Packs<\/strong>
Covers various blister packs.<\/td><\/tr>Aerosol Valves<\/strong>
Tests the seal performance of various aerosol valves, e.g. valves of pesticide, hair spray, auto spray paint and medical spray packages.<\/td><\/tr>Three-Sided Sealing Materials<\/strong>
Tests the withstand pressurization stress of packaging bags with three-sided seal and one-sided open.<\/td><\/tr>Pilfer-proof Closures<\/strong>
Tests the seal performance of various tamper-evident closures, e.g. closures used in packages for Coke, mineral water, beverage, edible oil, sauce (soy, vinegar and cooking wine), three-piece cans (beer and beverage) and paper cans (cylinder shape for potato chips).<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n![\"\"](\"http:\/\/packagingleaktester.com\/wp-content\/uploads\/2026\/10\/LSST001.jpg\")
<\/figure>\n\n\n\nParameter<\/strong><\/td> Specification<\/strong><\/td><\/tr> Test Range<\/td> 0 ~1MPa<\/td><\/tr> Accuracy<\/td> \u00b10.5%<\/td><\/tr> Air Supply Pressure<\/td> 0.4~1MPa<\/td><\/tr> Air Supply Port<\/td> \u03a68mm polyurethane tube<\/td><\/tr> HD Touch Screen<\/td> 7in<\/td><\/tr> Operating Voltage<\/td> AC 220V, 50Hz<\/td><\/tr> Total Weight<\/td> 20 kg<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n