{"id":9845,"date":"2026-02-24T15:11:45","date_gmt":"2026-02-24T07:11:45","guid":{"rendered":"https:\/\/www.packqc.com\/standard\/astm-d4917-2\/"},"modified":"2026-03-12T10:37:47","modified_gmt":"2026-03-12T02:37:47","slug":"astm-d4917","status":"publish","type":"standard","link":"https:\/\/www.packqc.com\/uz\/standard\/astm-d4917\/","title":{"rendered":"ASTM D4917"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Qog'oz sinovida ishqalanish koeffitsientini tushunish<\/h2>\n\n\n\n<p><strong data-start=\"1472\" data-end=\"1505\">Ishqalanish koeffitsienti (COF)<\/strong> ikki yuzaning harakatga qarshiligini aks ettiruvchi muhim parametrdir. Qog'oz ilovalarda bu qiymat bir varaqning ikkinchisi ustida sirpanishiga ta'sir qiladi. <strong data-start=\"1674\" data-end=\"1688\">statik COF<\/strong> harakatni boshlash uchun zarur kuchni aniqlaydi, holbuki <strong data-start=\"1752\" data-end=\"1767\">kinetik COF<\/strong> harakatni doimiy tezlikda saqlash uchun zarur kuchni o'lchaydi. ASTM D4917 gorizontal sirpanma harakatdan foydalangan holda ikkala o'lchovni ham amalga oshirishga imkon beradi.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Sinov uskunalari va namuna tayyorlash bo'yicha ko'rib chiqishlar<\/h2>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<div class=\"ast-oembed-container\" style=\"height: 100%;\"><iframe title=\"Qog&#039;ozning ishqalanish koeffitsienti sinovi davom etmoqda\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/Iq-UFiGqF64?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<\/div><\/figure>\n\n\n\n<p>ASTM D4917 ga muvofiq ishonchli COF testlarini o'tkazish uchun maxsus uskuna zarur. A <strong data-start=\"3843\" data-end=\"3877\">doimiy tezlikdagi harakat sinovchisi<\/strong>, yuk hujayrasi bilan jihozlangan va 150 \u00b1 30 mm\/min tezlikda chang'i tortishga qodir bo'lib, odatda ishlatiladi.<\/p>\n\n\n\n<p>To'g'ri natijalar uchun namuna standart atmosfera sharoitida (TAPPI T402 yoki ASTM D685 ga muvofiq) oldindan tayyorlanishi va mashina yo'nalishi hamda tolalar yo'nalishiga muvofiq tayyorlanishi kerak.<\/p>\n\n\n\n<p>Biz tavsiya qilamiz <strong data-start=\"4191\" data-end=\"4249\">Cell Instruments COF-01 ishqalanish koeffitsienti sinovchisi<\/strong>, ASTM D4917 va ISO 8295 talablariga javob berish uchun mo'ljallangan yuqori aniqlikdagi gorizontal tekislik asbobi. U raqamli boshqaruv, sozlanadigan sled variantlari va avtomatlashtirilgan kuch o'lchashni o'z ichiga oladi \u2014 bu statik va kinetik COF sinovlari uchun aniq va takrorlanuvchi natijalarni ta'minlaydi.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Qog'oz statik va kinetik ishqalanish sinovlari tushuntirilgan<\/h2>\n\n\n\n<p>ASTM D4917 bo'yicha qog'oz sinovi bir varaq qog'ozni tekis gorizontal yuzaga qo'yish va ustiga yana bir xil varaqni joylashtirishni o'z ichiga oladi. Odatda rezina yuzali slejd ustki varaq ustiga qo'yiladi. Slej tortilganda harakatni boshlash uchun zarur kuch (statik ishqalanish) va harakatni davom ettirish uchun zarur kuch (kinetik ishqalanish) o'lchanadi.<\/p>\n\n\n\n<p>Bu <strong data-start=\"2334\" data-end=\"2368\">Qog'ozda kinematik ishqalanishni sinash<\/strong> va <strong data-start=\"2373\" data-end=\"2406\">Qog'oz statik ishqalanish sinovi<\/strong> yuqori tezlikdagi tizimlarda varaq ajralishi, qog'oz konsistensiyasi va bosma moslashuvni tushunish uchun muhim ma'lumotlarni taqdim etadi.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Bosma va qoplamasiz qog'oz COF sinovlarida ASTM D4917 ning qo'llanilishi<\/h2>\n\n\n\n<p>The <strong data-start=\"2613\" data-end=\"2640\">Bosma qog'oz COF testi<\/strong> bosmaxona muhitida ayniqsa muhim, chunki ishqalanish barqarorligi bitta varaqni uzatish aniqligini ta'minlaydi va qog'oz tiqilishlari yoki noto'g'ri uzatishlarni kamaytiradi. Xuddi shunday, <strong data-start=\"2799\" data-end=\"2826\">Qoplamasiz qog'oz COF testi<\/strong> qog'oz ishlab chiqaruvchilarga mahsulotni qayta ishlash yoki yetkazib berishdan oldin uning texnik xususiyatlarini tasdiqlashga yordam beradi.<\/p>\n\n\n\n<p>Ikkala ilovada ham ASTM D4917 sinov o'zgaruvchanligini kamaytiradigan va sanoat sifat mezonlariga muvofiqlikni ta'minlaydigan standartlashtirilgan yondashuvni taklif etadi.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Nima uchun boshqa usullar o'rniga ASTM D4917 ni ishlatish kerak?<\/h2>\n\n\n\n<p>ASTM D4918 kabi egilgan tekislik usullari kinematik ishqalanish koeffitsientini aniqlay olmasa, ASTM D4917 gorizontal harakat orqali statik va kinematik ishqalanishni aniq baholash imkonini beradi. Bundan tashqari, u faqat birinchi kontaktda sinov o'tkazish orqali sirpanish natijasida yuzaga keladigan eskirishni minimallashtiradi, bu esa haqiqiy dunyoda varaqalar bilan ishlash sharoitlarini yaxshiroq taqlid qiladi.<\/p>\n\n\n\n<p>Rigidroq materiallar, masalan, to'lqinli karton uchun ASTM D4521 yoki ASTM D3247 ko'proq ma'qul. Ammo uchun <strong data-start=\"3557\" data-end=\"3592\">yupqa, egiluvchan, qoplamasiz qog'ozlar<\/strong>, D4917 ko'pgina qog'oz konvertatorlari va qadoqlash laboratoriyalari tomonidan tavsiya etiladigan asosiy usuldir.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">To'g'ri ishqalanish koeffitsienti sinov uskunasi tanlash<\/h2>\n\n\n\n<p>ASTM D4917 talablariga rioya qilish va qog'ozning COF natijalarini aniq olish uchun biz tavsiya qilamiz <strong data-start=\"4239\" data-end=\"4270\">Hujayra asboblari <a href=\"https:\/\/www.packqc.com\/uz\/product\/coefficient-of-friction-testing-equipment\/\">COF-01<\/a> Sinovchi<\/strong>, qaysi biri uchun optimallashtirilgan:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>gorizontal sinov<\/li>\n\n\n\n<li>Statik va kinetik ishqalanish o'lchovlari<\/li>\n\n\n\n<li>Qoplangan bo'lmagan va maxsus qog'ozlar uchun maxsus jihoz dizayni<\/li>\n\n\n\n<li>Aqlli ma'lumotlarni yozib olish\u00a0<\/li>\n<\/ul>\n\n\n\n<p>Musta\u04b3kam muhandislik va ilovaviy qo'llab-quvvatlash bilan ta'minlangan Cell Instruments ishqalanish sinovchilari turli qog'oz substratlari bo'ylab aniqlik va takrorlanuvchanlikni ta'minlaydi.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Biz bilan bog'laning va ASTM D4917 sinov yechimini oling <\/h2>\n\n\n\n<p>Qog'oz materiallarining ishqalanish xususiyatlari bosib chiqarish, qadoqlash va qayta ishlash jarayonlarining samaradorligiga sezilarli darajada ta'sir qiladi. <strong data-start=\"5267\" data-end=\"5281\">ASTM D4917<\/strong> qoplanshiz yozuv va bosma qog'ozning statik va kinetik ishqalanishini o'lchash uchun standartlashtirilgan, ishonchli ramkani taqdim etadi. aniq asbob-uskunalar, masalan <strong data-start=\"5448\" data-end=\"5478\">COF-01 tomonidan <a href=\"https:\/\/www.packqc.com\/uz\/\">Hujayra asboblari<\/a><\/strong>, Sifatli mutaxassislar testlarni ishonch bilan bajarishi, natijalarni talqin qilishi va takomillashtirishlarni amalga oshirishi mumkin.<\/p>\n\n\n\n<p>Siz sinov qilayotgan bo'lsangiz <strong data-start=\"5608\" data-end=\"5634\">qog'oz kinematik ishqalanish<\/strong>, <strong data-start=\"5636\" data-end=\"5655\">statik ishqalanish<\/strong>, <strong data-start=\"5657\" data-end=\"5679\">bosma qog'oz COF<\/strong>, yoki o'tkazish <strong data-start=\"5698\" data-end=\"5725\">Qoplamasiz qog'oz COF testi<\/strong>, ASTM D4917 ni tushunish va qo'llash natijalarlaringizning mazmunli, qayta ishlab chiqariladigan va global standartlarga mos kelishini ta'minlaydi.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Tez-tez so&#039;raladigan savollar<\/h2>\n\n\n\n<p><a tabindex=\"0\">1. ASTM D4917 nimani o'lchaydi?<\/a><br>ASTM D4917 qoplanshiz yozish va bosma qog'ozning statik va kinematik ishqalanish koeffitsientini gorizontal tekislik usuli yordamida o'lchaydi.<\/p>\n\n\n\n<p><a tabindex=\"0\">2. Qog'oz mahsulotlari uchun ishqalanish sinovi nima uchun muhim?<\/a><br>Ishqalanish printerlar va nusxa ko'chirish qurilmalarida qog'oz ta'minoti ishonchliligiga ta'sir qiladi hamda qayta ishlash va qadoqlash uskunalarida materiallarni to'g'ri ishlashini ta'minlaydi.<\/p>\n\n\n\n<p><a tabindex=\"0\">3. Statik COF kinetik COFdan qanday farq qiladi?<\/a><br>Statik COF ikki yuzaning o'rtasida harakatni boshlash uchun zarur kuchni o'lchaydi, kinetik COF esa bu harakatni davom ettirish uchun zarur kuchni o'lchaydi.<\/p>\n\n\n\n<p><a tabindex=\"0\">4. Qila oladimi <\/a><a href=\"https:\/\/store.astm.org\/d4917-97r07e01.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">ASTM D4917<\/a><a tabindex=\"0\"> Qoplangan yoki maxsus qog'ozlar uchun ishlatiladimi?<\/a><br>Qoplangan bo'lmagan yozuv va bosma qog'ozlar uchun optimallashtirilgan bo'lsa-da, ASTM D4917 boshqa turdagi qog'ozlarda ham qo'llanilishi mumkin, ammo natijalar aniqligi farq qilishi mumkin.<\/p>","protected":false},"excerpt":{"rendered":"<p>Understanding Coefficient of Friction in Paper Testing Coefficient of friction (COF) is a crucial parameter that reflects the resistance to motion between two surfaces. In paper applications, this value influences how one sheet slides over another. The static COF determines the force required to start the movement, while the kinetic COF measures the force needed [&hellip;]<\/p>","protected":false},"featured_media":10018,"parent":0,"template":"","meta":{"_acf_changed":true,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}}},"standard-category":[],"class_list":["post-9845","standard","type-standard","status-publish","has-post-thumbnail","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.packqc.com\/uz\/wp-json\/wp\/v2\/standard\/9845","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.packqc.com\/uz\/wp-json\/wp\/v2\/standard"}],"about":[{"href":"https:\/\/www.packqc.com\/uz\/wp-json\/wp\/v2\/types\/standard"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.packqc.com\/uz\/wp-json\/wp\/v2\/media\/10018"}],"wp:attachment":[{"href":"https:\/\/www.packqc.com\/uz\/wp-json\/wp\/v2\/media?parent=9845"}],"wp:term":[{"taxonomy":"standard-category","embeddable":true,"href":"https:\/\/www.packqc.com\/uz\/wp-json\/wp\/v2\/standard-category?post=9845"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}