{"id":451,"date":"2026-08-23T11:11:12","date_gmt":"2026-08-23T03:11:12","guid":{"rendered":"https:\/\/www.kolitai.com\/?p=451"},"modified":"2026-08-23T11:11:12","modified_gmt":"2026-08-23T03:11:12","slug":"kt-a39-paper-folding-endurance-tester","status":"publish","type":"post","link":"https:\/\/www.kolitai.com\/?p=451","title":{"rendered":"KT\u2011A39 Paper Folding Endurance Tester"},"content":{"rendered":"\n

1. Product Introduction<\/h3>\n\n\n\n

The folding endurance tester is a special instrument for measuring folding fatigue strength of paper, paperboard and other sheet\u2011shaped materials. It is designed according to internationally\u2011accepted MIT folding endurance principle. Adopting photoelectric control technology, the folding chuck can automatically return to home position after each test for convenient next\u2011time operation. It is equipped with powerful data processing functions: it can convert double\u2011fold times of single specimen and corresponding logarithmic value (folding endurance), and statistically process test data of multiple specimens in one group, including maximum value, minimum value, average value and coefficient of variation. All data are stored in microcomputer and displayed on screen. Controlled by precision motor for accurate positioning. Featuring advanced technology, complete functions, reliable performance and easy operation, it is ideal test equipment for paper\u2011making, packaging, scientific research, product quality supervision and inspection industries.<\/p>\n\n\n\n

2. Technical Parameters<\/h3>\n\n\n\n
    \n
  1. Measuring range: 0~99999 times<\/li>\n\n\n\n
  2. Folding angle: 135\u00b12\u00b0 (30~135\u00b0, stepless digital adjustment)<\/li>\n\n\n\n
  3. Folding speed: Standard: 175\u00b110 times\/min (20~200 times\/min, stepless digital adjustment)<\/li>\n\n\n\n
  4. Spring tension: 4.9~14.7\u202fN; spring compresses at least 17\u202fmm per additional 9.8\u202fN tension<\/li>\n\n\n\n
  5. Tension variation caused by rotating eccentricity of folding chuck: \u22640.343\u202fN<\/li>\n\n\n\n
  6. Folding head width: 19\u00b11\u202fmm<\/li>\n\n\n\n
  7. Crease radius R0.38\u00b10.02\u202fmm (customizable R\u2011angle for glass\u2011fiber and other materials)<\/li>\n\n\n\n
  8. Gap width of folding slot: 0.25\u202fmm \/ 0.5\u202fmm \/ 0.75\u202fmm \/ 1.00\u202fmm (customizable chuck for glass\u2011fiber and other materials)<\/li>\n\n\n\n
  9. Standard weights: 4.9\u202fN, 9.8\u202fN<\/li>\n\n\n\n
  10. Man\u2011machine interface: 5\u2011inch color LCD touch screen, real\u2011time display of folding cycles<\/li>\n\n\n\n
  11. Print output: Integrated modular thermal printer<\/li>\n\n\n\n
  12. Working environment: Temperature (0~35)\u202f\u2103, humidity\uff1c85%<\/li>\n\n\n\n
  13. Overall dimension: 330\u00d7350\u00d7450\u202fmm<\/li>\n\n\n\n
  14. Weight: 35\u202fkg<\/li>\n\n\n\n
  15. Power supply: AC220V, 50Hz<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

    1. Product Introduction The folding endurance tester is […]<\/p>\n","protected":false},"author":1,"featured_media":452,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[21],"tags":[],"class_list":["post-451","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-paper-packaging-testing"],"_links":{"self":[{"href":"https:\/\/www.kolitai.com\/index.php?rest_route=\/wp\/v2\/posts\/451","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.kolitai.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kolitai.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kolitai.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kolitai.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=451"}],"version-history":[{"count":1,"href":"https:\/\/www.kolitai.com\/index.php?rest_route=\/wp\/v2\/posts\/451\/revisions"}],"predecessor-version":[{"id":453,"href":"https:\/\/www.kolitai.com\/index.php?rest_route=\/wp\/v2\/posts\/451\/revisions\/453"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.kolitai.com\/index.php?rest_route=\/wp\/v2\/media\/452"}],"wp:attachment":[{"href":"https:\/\/www.kolitai.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=451"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kolitai.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=451"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kolitai.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=451"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}