{"id":1425,"date":"2026-07-23T06:12:28","date_gmt":"2026-07-23T06:12:28","guid":{"rendered":"https:\/\/www.packtests.com\/?post_type=standard&#038;p=1425"},"modified":"2026-07-23T06:14:04","modified_gmt":"2026-07-23T06:14:04","slug":"astm-d1894","status":"publish","type":"standard","link":"https:\/\/www.packtests.com\/ro\/standard\/astm-d1894\/","title":{"rendered":"ASTM D1894"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Foliile din plastic joac\u0103 un rol esen\u021bial \u00een industria modern\u0103 a ambalajelor, de la pungi pentru alimente \u0219i plicule\u021be farmaceutice p\u00e2n\u0103 la c\u0103ptu\u0219eli industriale \u0219i ambalaje pentru produse de larg consum. Una dintre cele mai importante caracteristici ale suprafe\u021bei care influen\u021beaz\u0103 performan\u021ba ambalajului este <strong>ASTM D1894<\/strong> coeficientul de frecare (COF). Un nivel inadecvat de frecare poate duce la \u00eentreruperi \u00een produc\u021bie, prelucrabilitate redus\u0103, \u00eenc\u0103rc\u0103turi instabile pe pale\u021bi sau o experien\u021b\u0103 nesatisf\u0103c\u0103toare pentru consumatori.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Acest articol explic\u0103 <strong>ASTM D1894<\/strong> din perspectiva ingineriei practice, inclusiv scopul <strong>testul coeficientului de frecare<\/strong>, principiile de testare, preg\u0103tirea probelor, interpretarea rezultatelor \u0219i alegerea echipamentelor. Indiferent dac\u0103 sunte\u021bi produc\u0103tor de ambalaje, inginer de control al calit\u0103\u021bii, tehnician de laborator sau dezvoltator de produse, \u00een\u021belegerea <strong>ASTM D1894<\/strong> contribuie la asigurarea unei calit\u0103\u021bi constante a produselor \u0219i a unei produc\u021bii eficiente.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">De ce este important standardul ASTM D1894<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>ASTM D1894<\/strong> este metoda standard de testare utilizat\u0103 pentru determinarea <strong>coeficientul static de frecare<\/strong> \u0219i <strong>coeficientul cinetic de frecare<\/strong> din folie \u0219i pl\u0103ci de plastic.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Testul evalueaz\u0103 for\u021ba necesar\u0103 pentru a ini\u021bia mi\u0219carea \u00eentre dou\u0103 suprafe\u021be aflate \u00een contact \u0219i for\u021ba necesar\u0103 pentru a men\u021bine alunecarea continu\u0103. Aceste m\u0103sur\u0103tori ofer\u0103 informa\u021bii valoroase despre caracteristicile de alunecare ale materialelor de ambalare.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00cen produc\u021bia de ambalaje, frecarea influen\u021beaz\u0103 \u00een mod direct:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Opera\u021biuni de formare, umplere \u0219i sigilare de mare vitez\u0103<\/li>\n\n\n\n<li>Echipamente de etichetare automat\u0103<\/li>\n\n\n\n<li>Sisteme de ambalare \u00een cutii \u0219i de transport<\/li>\n\n\n\n<li>Stabilitatea stivuirii ambalajelor<\/li>\n\n\n\n<li>Performan\u021ba de \u00eenf\u0103\u0219urare a rolelor<\/li>\n\n\n\n<li>Experien\u021ba consumatorilor \u00een ceea ce prive\u0219te utilizarea produsului<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Deoarece frecarea la suprafa\u021b\u0103 influen\u021beaz\u0103 at\u00e2t eficien\u021ba procesului de fabrica\u021bie, c\u00e2t \u0219i performan\u021ba produsului final, <strong>testarea COF a ambalajelor<\/strong> a devenit o procedur\u0103 de rutin\u0103 de control al calit\u0103\u021bii \u00een numeroase sectoare industriale.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u00cen\u021belegerea coeficien\u021bilor de frecare static \u0219i cinetic<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>testul coeficientului de frecare<\/strong> m\u0103soar\u0103 dou\u0103 tipuri diferite de comportament la frecare.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Parametru<\/th><th>Descriere<\/th><th>Importan\u021ba<\/th><\/tr><\/thead><tbody><tr><td>COF static<\/td><td>For\u021ba necesar\u0103 pentru a ini\u021bia mi\u0219carea<\/td><td>Indic\u0103 o tendin\u021b\u0103 ini\u021bial\u0103 de lipire sau blocare<\/td><\/tr><tr><td>COF cinetic<\/td><td>For\u021ba necesar\u0103 pentru men\u021binerea mi\u0219c\u0103rii<\/td><td>Reflect\u0103 performan\u021ba de alunecare continu\u0103<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Un coeficient de frecare static ridicat poate determina lipirea \u00eentre ele a foliilor, \u00een timp ce un coeficient de frecare static foarte sc\u0103zut poate reduce stabilitatea stivei. \u00cen mod similar, coeficientul de frecare cinetic influen\u021beaz\u0103 fluiditatea cu care materialele se deplaseaz\u0103 prin utilajele de ambalare.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nivelul optim de frecare depinde de aplica\u021bie, mai degrab\u0103 dec\u00e2t de ob\u021binerea celei mai mici valori posibile.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Principiul de testare conform standardului ASTM D1894<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Principiul <strong>ASTM D1894<\/strong> este simplu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O prob\u0103 este fixat\u0103 pe o platform\u0103 de testare orizontal\u0103, \u00een timp ce o alt\u0103 prob\u0103 este ata\u0219at\u0103 la un sanie cu greutate. Sania este tras\u0103 cu o vitez\u0103 controlat\u0103 cu ajutorul unui instrument de testare. Pe parcursul mi\u0219c\u0103rii, instrumentul m\u0103soar\u0103 continuu for\u021ba de tragere.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Coeficientul de frecare se calculeaz\u0103 dup\u0103 formula:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>COF = For\u021ba de frecare \u00f7 For\u021ba normal\u0103<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For\u021ba maxim\u0103 necesar\u0103 pentru a ini\u021bia mi\u0219carea reprezint\u0103 coeficientul de frecare static, \u00een timp ce for\u021ba medie \u00een timpul alunec\u0103rii \u00een regim sta\u021bionar reprezint\u0103 coeficientul de frecare cinetic.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Controlul precis al vitezei este esen\u021bial, deoarece valorile frec\u0103rii depind de viteza de deplasare. Standardul ASTM D1894 specific\u0103 o vitez\u0103 de testare de <strong>150 mm\/min<\/strong>, \u00een timp ce standardul ISO 8295 prevede <strong>100 mm\/min<\/strong>, ceea ce face ca respectarea standardului selectat de c\u0103tre instrument s\u0103 fie esen\u021bial\u0103.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Cerin\u021be privind probele de testare<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Preg\u0103tirea corespunz\u0103toare a probelor este esen\u021bial\u0103 pentru ob\u021binerea unor date fiabile.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Conform standardului ASTM D1894:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>E\u0219antion<\/th><th>Dimensiune tipic\u0103<\/th><\/tr><\/thead><tbody><tr><td>E\u0219antion plan<\/td><td>Aproximativ 250 \u00d7 130 mm<\/td><\/tr><tr><td>Folie fixat\u0103 pe sanie<\/td><td>Aproximativ 120 \u00d7 120 mm<\/td><\/tr><tr><td>Foaie groas\u0103 fixat\u0103 pe sanie<\/td><td>63,5 \u00d7 63,5 mm<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Standardul recomand\u0103, de asemenea:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Testarea a cel pu\u021bin cinci e\u0219antioane<\/li>\n\n\n\n<li>Utilizarea unor probe curate, necontaminate<\/li>\n\n\n\n<li>Evitarea amprentelor digitale pe suprafe\u021bele de testare<\/li>\n\n\n\n<li>\u00cenlocuirea probelor dup\u0103 fiecare test<\/li>\n\n\n\n<li>Men\u021binerea unei direc\u021bii constante a materialului pe lungime \u00een timpul test\u0103rii<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Chiar \u0219i cantit\u0103\u021bi mici de praf sau ulei pot influen\u021ba \u00een mod semnificativ valorile de frecare m\u0103surate.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Factori care influen\u021beaz\u0103 coeficientul de frecare al foliei de plastic<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>coeficientul de frecare al foliei de plastic<\/strong> depinde de multe variabile, pe l\u00e2ng\u0103 materialul \u00een sine.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Printre factorii de influen\u021b\u0103 obi\u0219nui\u021bi se num\u0103r\u0103:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Aditivi pentru slip<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Foliile din polietilen\u0103 \u0219i polipropilen\u0103 con\u021bin adesea aditivi de alunecare care migreaz\u0103 spre suprafa\u021b\u0103 \u00een timp, modific\u00e2nd caracteristicile de frecare.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Tratarea suprafe\u021belor<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Tratamentul cu Corona, tratamentul cu plasm\u0103, acoperirile \u0219i imprimarea modific\u0103 energia de suprafa\u021b\u0103 \u0219i, \u00een consecin\u021b\u0103, influen\u021beaz\u0103 comportamentul la frecare.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u00cemb\u0103tr\u00e2nirea peliculei<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Mul\u021bi aditivi se separ\u0103 treptat. Prin urmare, valorile m\u0103sur\u0103torilor de frecare se pot modifica la c\u00e2teva zile sau s\u0103pt\u0103m\u00e2ni dup\u0103 produc\u021bie.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Temperatura \u0219i umiditatea<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Condi\u021biile de mediu influen\u021beaz\u0103 propriet\u0103\u021bile suprafe\u021bei polimerilor \u0219i trebuie controlate pe parcursul test\u0103rii.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Procesul de fabrica\u021bie<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Condi\u021biile de extrudare, temperatura rolei de r\u0103cire \u0219i viteza de prelucrare influen\u021beaz\u0103 toate morfologia suprafe\u021bei.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pentru a se putea realiza compara\u021bii relevante, laboratoarele ar trebui s\u0103 men\u021bin\u0103 proceduri de condi\u021bionare \u0219i condi\u021bii de mediu constante.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Coeficientul de frecare al h\u00e2rtiei \u00een compara\u021bie cu cel al foliei de plastic<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">De\u0219i <strong>ASTM D1894<\/strong> De\u0219i se refer\u0103 \u00een principal la foliile \u0219i peliculele din plastic, conceptele similare de testare a frec\u0103rii sunt utile \u0219i pentru evaluarea <strong>coeficientul de frecare al h\u00e2rtiei<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Printre aplica\u021biile ambalajelor din h\u00e2rtie se num\u0103r\u0103:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Cutii pliabile<\/li>\n\n\n\n<li>C\u0103ptu\u0219eli din carton ondulat<\/li>\n\n\n\n<li>Etichete din h\u00e2rtie<\/li>\n\n\n\n<li>Carton acoperit cu un strat de protec\u021bie<\/li>\n\n\n\n<li>Substraturi de tip\u0103rire<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Suprafe\u021bele de h\u00e2rtie prezint\u0103 adesea caracteristici de frecare diferite, datorit\u0103 rugozit\u0103\u021bii, acoperirilor, orient\u0103rii fibrelor \u0219i absorb\u021biei de umiditate. \u00cen multe opera\u021biuni de prelucrare, frecarea dintre h\u00e2rtie \u0219i foliile de plastic afecteaz\u0103, de asemenea, performan\u021ba utilajelor.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00cen\u021belegerea at\u00e2t a <strong>coeficientul de frecare al h\u00e2rtiei<\/strong> \u0219i materialele plastice le permit produc\u0103torilor s\u0103 optimizeze sistemele de ambalare multimateriale.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Aplica\u021bii ale test\u0103rii COF \u00een domeniul ambalajelor<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Testarea COF a ambalajelor<\/strong> este utilizat\u0103 pe scar\u0103 larg\u0103 pe tot parcursul procesului de dezvoltare \u0219i fabrica\u021bie a produselor.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ambalaje flexibile<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pungi pentru gust\u0103ri<\/li>\n\n\n\n<li>Ambalaje pentru produse alimentare congelate<\/li>\n\n\n\n<li>Pungi retortabile<\/li>\n\n\n\n<li>Pungi pentru vid<\/li>\n\n\n\n<li>Pungi verticale<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Ambalaje farmaceutice<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pungi medicale<\/li>\n\n\n\n<li>Materiale pentru capacele blisterelor<\/li>\n\n\n\n<li>Sisteme de barier\u0103 sterile<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Produse de larg consum<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ambalaje pentru produse de \u00eengrijire personal\u0103<\/li>\n\n\n\n<li>Ambalaje pentru produse de uz casnic<\/li>\n\n\n\n<li>Ambalaje cosmetice flexibile<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Ambalaje industriale<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Folii elastice<\/li>\n\n\n\n<li>Folii termocontractabile<\/li>\n\n\n\n<li>C\u0103ptu\u0219eli de protec\u021bie<\/li>\n\n\n\n<li>Saci pentru sarcini grele<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Testarea de rutin\u0103 a coeficientului de frecare ajut\u0103 la identificarea varia\u021biilor de produc\u021bie \u00eenainte ca produsele s\u0103 ajung\u0103 la clien\u021bi.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Cum se alege un aparat de testare a coeficientului de frecare (COF)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Alegerea celui potrivit <strong>Aparat de testare COF<\/strong> nu se rezum\u0103 doar la respectarea standardului de baz\u0103. Laboratoarele ar trebui s\u0103 evalueze mai multe caracteristici de performan\u021b\u0103.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Printre aspectele importante de luat \u00een considerare se num\u0103r\u0103:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Conformitate cu standardele ASTM D1894 \u0219i ISO 8295<\/li>\n\n\n\n<li>Control stabil al vitezei de trac\u021biune<\/li>\n\n\n\n<li>Celul\u0103 de sarcin\u0103 de \u00eenalt\u0103 precizie<\/li>\n\n\n\n<li>Calculul automat al coeficientului de frecare static \u0219i cinetic (COF)<\/li>\n\n\n\n<li>Utilizare u\u0219oar\u0103<\/li>\n\n\n\n<li>Capacit\u0103\u021bi de stocare \u0219i export al datelor<\/li>\n\n\n\n<li>Sistem de mi\u0219care repetabil\u0103<\/li>\n\n\n\n<li>Instalare u\u0219oar\u0103 a probelor<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Laboratoarele moderne beneficiaz\u0103, de asemenea, de interfe\u021be cu ecran tactil, analize statistice \u0219i func\u021bii de raportare digital\u0103.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Aparat de testare a coeficientului de frecare COF-01 de la Cell Instruments<\/h2>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/07\/COF-01cof-testing-machine-1024x1024.webp\" alt=\"ASTM D1894 \u2013 Testarea coeficientului de frecare pentru ambalaje\" class=\"wp-image-1426\" style=\"width:314px;height:auto\" title=\"\" srcset=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/07\/COF-01cof-testing-machine-1024x1024.webp 1024w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/07\/COF-01cof-testing-machine-300x300.webp 300w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/07\/COF-01cof-testing-machine-150x150.webp 150w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/07\/COF-01cof-testing-machine-768x768.webp 768w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/07\/COF-01cof-testing-machine-12x12.webp 12w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/07\/COF-01cof-testing-machine.webp 1080w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"wp-block-paragraph\">Pentru laboratoarele care au nevoie de echipamente fiabile <strong>testul coeficientului de frecare<\/strong> rezultate, cele <strong>COF-01 Aparat de testare a coeficientului de frecare<\/strong> din <a href=\"https:\/\/www.packtests.com\/ro\/\" target=\"_blank\" rel=\"noreferrer noopener\">Cell Instruments<\/a> ofer\u0103 o solu\u021bie practic\u0103 pentru controlul de rutin\u0103 al calit\u0103\u021bii \u0219i pentru aplica\u021bii de cercetare.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Specifica\u021bii cheie<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Articolul<\/th><th>Specifica\u021bii<\/th><\/tr><\/thead><tbody><tr><td>Celul\u0103 de sarcin\u0103<\/td><td>5 N (personalizabil)<\/td><\/tr><tr><td>Precizie<\/td><td>0,51 TP5T F.S.<\/td><\/tr><tr><td>Greutatea saniei<\/td><td>200 \u00b11 g<\/td><\/tr><tr><td>Viteza de testare<\/td><td>150 mm\/min (ASTM), 100 mm\/min (ISO)<\/td><\/tr><tr><td>Sistem de mi\u0219care<\/td><td>Motor pas cu pas cu \u0219urub cu bile<\/td><\/tr><tr><td>Interfa\u021ba cu utilizatorul<\/td><td>Control prin PLC cu interfa\u021b\u0103 om-ma\u0219in\u0103 (HMI) cu ecran tactil<\/td><\/tr><tr><td>Ie\u0219ire date<\/td><td>Max, Min, COF mediu, imprimant\u0103, RS-232 op\u021bional<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Caracteristici practice<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Modelul COF-01 este conceput pentru a spori eficien\u021ba test\u0103rii prin:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Testare \u00een dou\u0103 moduri: static\u0103 \u0219i cinetic\u0103<\/li>\n\n\n\n<li>Achizi\u021bia automat\u0103 a datelor<\/li>\n\n\n\n<li>Afi\u0219area \u00een timp real a curbei de frecare<\/li>\n\n\n\n<li>Mi\u0219care de precizie repetabil\u0103<\/li>\n\n\n\n<li>Platform\u0103 de testare rezistent\u0103 din aluminiu<\/li>\n\n\n\n<li>Interfa\u021b\u0103 lingvistic\u0103 personalizabil\u0103<\/li>\n\n\n\n<li>Protec\u021bie \u00eempotriva suprasarcinilor \u0219i revenire automat\u0103<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Aceste caracteristici ajut\u0103 laboratoarele s\u0103 ob\u021bin\u0103 rezultate consecvente \u0219i repetabile, simplific\u00e2nd \u00een acela\u0219i timp activitatea zilnic\u0103.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Cele mai bune practici pentru efectuarea unor teste fiabile conform standardului ASTM D1894<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Pentru a \u00eembun\u0103t\u0103\u021bi consecven\u021ba m\u0103sur\u0103torilor:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Se vor examina probele \u00een condi\u021bii de laborator controlate.<\/li>\n\n\n\n<li>Manipula\u021bi probele cu m\u0103nu\u0219i ori de c\u00e2te ori este posibil.<\/li>\n\n\n\n<li>Folosi\u021bi probe proaspete pentru fiecare test.<\/li>\n\n\n\n<li>Men\u021bine\u021bi platforma de testare curat\u0103.<\/li>\n\n\n\n<li>Verifica\u021bi periodic greutatea saniei.<\/li>\n\n\n\n<li>Calibra\u021bi regulat celula de sarcin\u0103.<\/li>\n\n\n\n<li>Men\u021bine\u021bi viteza de tragere specificat\u0103.<\/li>\n\n\n\n<li>Efectua\u021bi un num\u0103r suficient de repet\u0103ri pentru a asigura fiabilitatea statistic\u0103.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Practicile de laborator consecvente contribuie adesea mai mult la repetabilitate dec\u00e2t instrumentul \u00een sine.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">ASTM D1894 \u0219i standardele conexe<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">De\u0219i <strong>ASTM D1894<\/strong> este unul dintre cele mai utilizate standarde privind coeficientul de frecare pentru foliile din plastic; laboratoarele lucreaz\u0103 frecvent cu standarde conexe, \u00een func\u021bie de material \u0219i de aplica\u021bie.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Standard<\/th><th>Cerere<\/th><\/tr><\/thead><tbody><tr><td>ASTM D1894<\/td><td>Coeficientul de frecare static \u0219i cinetic al foliilor \u0219i peliculelor din plastic<\/td><\/tr><tr><td>ISO 8295<\/td><td>Coeficientul de frecare al foliei \u0219i al materialelor plastice sub form\u0103 de foi<\/td><\/tr><tr><td>ASTM D2534<\/td><td>Coeficientul de frecare al acoperirilor din cear\u0103<\/td><\/tr><tr><td>TAPPI T549<\/td><td>Testarea rezisten\u021bei la frecare a h\u00e2rtiei \u0219i a cartonului<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Alegerea standardului adecvat garanteaz\u0103 c\u0103 rezultatele sunt relevante pentru specifica\u021biile produsului \u0219i cerin\u021bele clien\u021bilor.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Concluzie<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Fric\u021biunea de suprafa\u021b\u0103 influen\u021beaz\u0103 \u00een mod semnificativ performan\u021ba ambal\u0103rii, eficien\u021ba produc\u021biei \u0219i calitatea produsului. <a href=\"https:\/\/store.astm.org\/d1894-24.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">ASTM D1894<\/a> ofer\u0103 o metod\u0103 standardizat\u0103 de m\u0103surare a caracteristicilor de frecare at\u00e2t static\u0103, c\u00e2t \u0219i cinetic\u0103, permi\u021b\u00e2nd produc\u0103torilor s\u0103 monitorizeze uniformitatea procesului, s\u0103 evalueze modific\u0103rile aduse materialelor \u0219i s\u0103 optimizeze performan\u021ba ambalajului.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Fie c\u0103 este vorba de evaluarea <strong>coeficientul de frecare al foliei de plastic<\/strong>, evalu\u00e2nd <strong>coeficientul de frecare al h\u00e2rtiei<\/strong>, sau efectuarea unor controale de rutin\u0103 <strong>testarea COF a ambalajelor<\/strong>, echipamentele fiabile \u0219i procedurile standardizate sunt esen\u021biale pentru ob\u021binerea unor rezultate relevante. O calitate \u00eenalt\u0103 a <strong>Aparat de testare COF<\/strong>, \u00eempreun\u0103 cu preg\u0103tirea corespunz\u0103toare a probelor \u0219i condi\u021biile controlate de laborator, le permite produc\u0103torilor s\u0103 ia decizii informate privind calitatea, s\u0103 reduc\u0103 variabilitatea produc\u021biei \u0219i s\u0103 \u00eembun\u0103t\u0103\u021beasc\u0103 performan\u021ba ambalajelor \u00eentr-o gam\u0103 larg\u0103 de industrii.<\/p>","protected":false},"excerpt":{"rendered":"<p>Plastic films play a critical role in modern packaging, from food pouches and pharmaceutical sachets to industrial liners and consumer product wrapping. One of the most important surface characteristics influencing package performance is the ASTM D1894 coefficient of friction (COF). An improper friction level can lead to production downtime, poor machinability, unstable pallet loads, or [&hellip;]<\/p>","protected":false},"featured_media":1426,"parent":0,"template":"","meta":{"_acf_changed":false},"standard-category":[],"class_list":["post-1425","standard","type-standard","status-publish","has-post-thumbnail","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.packtests.com\/ro\/wp-json\/wp\/v2\/standard\/1425","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.packtests.com\/ro\/wp-json\/wp\/v2\/standard"}],"about":[{"href":"https:\/\/www.packtests.com\/ro\/wp-json\/wp\/v2\/types\/standard"}],"version-history":[{"count":5,"href":"https:\/\/www.packtests.com\/ro\/wp-json\/wp\/v2\/standard\/1425\/revisions"}],"predecessor-version":[{"id":1590,"href":"https:\/\/www.packtests.com\/ro\/wp-json\/wp\/v2\/standard\/1425\/revisions\/1590"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.packtests.com\/ro\/wp-json\/wp\/v2\/media\/1426"}],"wp:attachment":[{"href":"https:\/\/www.packtests.com\/ro\/wp-json\/wp\/v2\/media?parent=1425"}],"wp:term":[{"taxonomy":"standard-category","embeddable":true,"href":"https:\/\/www.packtests.com\/ro\/wp-json\/wp\/v2\/standard-category?post=1425"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}