{"id":5164,"date":"2026-07-12T01:17:02","date_gmt":"2026-07-12T01:17:02","guid":{"rendered":"https:\/\/wolorin.com\/?p=5164"},"modified":"2026-07-12T01:17:02","modified_gmt":"2026-07-12T01:17:02","slug":"electrode-web-defects-after-roller-contact","status":"publish","type":"post","link":"https:\/\/wolorin.com\/es\/blog\/electrode-web-defects-after-roller-contact\/","title":{"rendered":"Defectos superficiales en la red de electrodos de la bater\u00eda tras el contacto con el rodillo: microcompresi\u00f3n, acumulaci\u00f3n de part\u00edculas y ara\u00f1azos."},"content":{"rendered":"
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Defectos superficiales en la red de electrodos de la bater\u00eda tras el contacto con el rodillo: microcompresi\u00f3n, acumulaci\u00f3n de part\u00edculas y ara\u00f1azos.<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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A coated electrode web may pass coating and drying with an acceptable surface, then show tiny bright dots, pressed particles, or fine scratches after one roller position. The marks can be small enough to miss during normal viewing, then become clear under side light, camera inspection, or winding review.<\/p>

On electrode coating, a light roller contact can make a small surface difference visible. A loose particle can become a pressed spot. A short sliding contact can become a scratch. The useful check is to find where the surface first changes, which side touched the roller, and what shape the mark takes.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Find the First Visible Change on the Web<\/h2>\r\n\r\n

Start with two short samples: one before the suspected roller and one after it. Use the same light angle. Mark the machine direction and the web lane. Side light is useful because micro-compression on electrode coating often appears as a reflection change instead of a deep dent.<\/p>\r\n\r\n

The first check should stay simple.<\/p>\r\n\r\n

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Field Point<\/th>\r\n What It Shows<\/th>\r\n <\/tr>\r\n <\/thead>\r\n
Before and after the suspected roller<\/td>\r\n Where the defect first appears<\/td>\r\n <\/tr>\r\n
Coating side or foil side contact<\/td>\r\n Whether the sensitive coating touched the roller<\/td>\r\n <\/tr>\r\n
One lane or random spread<\/td>\r\n Whether the issue follows one contact path<\/td>\r\n <\/tr>\r\n
Side-light appearance<\/td>\r\n Whether the mark is a spot, particle, or scratch<\/td>\r\n <\/tr>\r\n
Cleaning result<\/td>\r\n Whether contamination is involved<\/td>\r\n <\/tr>\r\n <\/tbody>\r\n <\/table>\r\n <\/div>\r\n <\/div>\r\n\r\n

A roller that runs safely on the foil side can still mark the coating side. A dry surface can still be sensitive when it carries loose powder, weak top-layer particles, or a fragile coating surface. A wet or tacky surface can accept contact marks even faster.<\/p>\r\n\r\n

For battery electrode handling, clean contact, and path control positions, see Rodillos para l\u00edneas de bater\u00edas de litio<\/a>.<\/p>\r\n <\/section>\r\n\r\n

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Read What the Contact Did to the Surface<\/h2>\r\n\r\n

A useful field reading is to look at what happened during contact.<\/p>\r\n\r\n

Some marks are surface changes. The coating remains in place, yet it reflects light differently after contact. These are often seen as micro-compression spots, small dull dots, or light gloss changes.<\/p>\r\n\r\n

Some marks are pressed particles. The particle may already sit on the web before the roller. Contact turns it into a visible dot, pit, or small pressed mark.<\/p>\r\n\r\n

Some marks are dragging marks. The coating side rubs against a hard particle, damaged roller area, dry deposit, or poorly rotating surface. The result is usually a fine line in the running direction.<\/p>\r\n\r\n

This reading helps keep the inspection tight. It separates optical pressure marks, particle marks, and sliding scratches before the team changes several settings at once.<\/p>\r\n <\/section>\r\n\r\n <\/div>\r\n<\/section>\r\n\r\n