{"id":1854,"date":"2026-07-23T06:02:51","date_gmt":"2026-07-23T10:02:51","guid":{"rendered":"https:\/\/slecotech.com\/?p=1854"},"modified":"2026-07-24T02:39:09","modified_gmt":"2026-07-24T06:39:09","slug":"hot-washing-vs-cold-washing-pet-recycling","status":"publish","type":"post","link":"https:\/\/slecotech.com\/ru\/hot-washing-vs-cold-washing-pet-recycling\/","title":{"rendered":"Hot Washing vs Cold Washing in PET Recycling What\u2019s the Difference?"},"content":{"rendered":"[et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.16&#8243; min_height=&#8221;445.4px&#8221; custom_margin=&#8221;-1px|||||&#8221; custom_padding=&#8221;||0px|||&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_row _builder_version=&#8221;4.16&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; min_height=&#8221;461.8px&#8221; custom_margin=&#8221;-15px|auto|2px|auto||&#8221; custom_padding=&#8221;2px|12px|5px|||&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.16&#8243; custom_padding=&#8221;|||&#8221; global_colors_info=&#8221;{}&#8221; custom_padding__hover=&#8221;|||&#8221;][et_pb_text _builder_version=&#8221;4.27.4&#8243; text_font=&#8221;Poppins|500|||||||&#8221; text_font_size=&#8221;17px&#8221; text_line_height=&#8221;1.9em&#8221; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; min_height=&#8221;263.9px&#8221; custom_margin=&#8221;-3px||-21px|||&#8221; custom_padding=&#8221;0px||0px|||&#8221; global_colors_info=&#8221;{}&#8221;]<p>Hot washing and cold washing are two different cleaning technologies used in PET bottle recycling. Cold washing mainly removes loose contaminants such as dust, dirt, and water-soluble residues through mechanical friction and rinsing. Hot washing uses heated water, alkaline chemicals, and controlled residence time to remove stronger contaminants such as adhesives, oils, organic residues, and labels. For high-quality PET flakes used in bottle-to-bottle recycling, hot washing is generally preferred because it achieves higher cleanliness and lower contamination levels.<\/p>\n<strong><b><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"1088\" src=\"https:\/\/slecotech.com\/wp-content\/uploads\/2026\/07\/Technical-Specifications-Comparison-Chart.jpg\" alt=\"PET bottle washing and recycling equipment comparison chart\" class=\"size-medium aligncenter\" \/>\u00a0<\/b><\/strong>\n\n<h2><strong><b>What Is Hot Washing and Cold Washing in PET Recycling?<\/b><\/strong><\/h2>\n<p>PET bottle washing lines use different cleaning stages to convert post-consumer PET bottles into clean recycled PET flakes. The washing process directly affects the quality, purity, and final application of recycled PET materials.<\/p>\n<ol><\/ol>\n<p><!-- \/divi:paragraph --><\/p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=&#8221;2_5,3_5&#8243; _builder_version=&#8221;4.16&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; min_height=&#8221;325.1px&#8221; custom_margin=&#8221;13px|auto|-13px|auto||&#8221; custom_padding=&#8221;84px|0px|0px|||&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;2_5&#8243; _builder_version=&#8221;4.16&#8243; custom_padding=&#8221;|||&#8221; global_colors_info=&#8221;{}&#8221; custom_padding__hover=&#8221;|||&#8221;][et_pb_image src=&#8221;https:\/\/slecotech.com\/wp-content\/uploads\/2026\/07\/Hot-vs-Cold-Washing-Comparison-Vertical.jpg&#8221; title_text=&#8221;Single-Shaft Crusher (1)&#8221; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; width=&#8221;93.6%&#8221; min_height=&#8221;248px&#8221; custom_margin=&#8221;-83px|6px|2px|9px||&#8221; custom_padding=&#8221;5px|3px|0px|2px||&#8221; hover_enabled=&#8221;0&#8243; global_colors_info=&#8221;{}&#8221; sticky_enabled=&#8221;0&#8243;][\/et_pb_image][\/et_pb_column][et_pb_column type=&#8221;3_5&#8243; _builder_version=&#8221;4.16&#8243; custom_padding=&#8221;|||&#8221; global_colors_info=&#8221;{}&#8221; custom_padding__hover=&#8221;|||&#8221;][et_pb_text _builder_version=&#8221;4.27.4&#8243; text_font=&#8221;Poppins|500|||||||&#8221; text_font_size=&#8221;17px&#8221; text_line_height=&#8221;1.9em&#8221; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; width=&#8221;100%&#8221; min_height=&#8221;184.7px&#8221; custom_margin=&#8221;-92px|-313px|-2px|-21px||&#8221; custom_padding=&#8221;0px|0px|0px|0px||&#8221; global_colors_info=&#8221;{}&#8221;]<p>Cold washing is a mechanical cleaning process that uses normal-temperature water, friction washers, and rinsing systems to remove surface contaminants.<\/p>\n<p>Hot washing is an advanced cleaning process that uses elevated water temperature, alkaline solutions, and mechanical agitation to remove difficult contaminants from PET flakes.<\/p>\n<p>A typical PET bottle washing line from Streamline Eco Tech can integrate:<\/p>\n<ul>\n<li>Bottle sorting system<\/li>\n<li>Label remover<\/li>\n<li>\u0414\u0440\u043e\u0431\u0438\u043b\u043a\u0430<\/li>\n<li>Friction washer<\/li>\n<li>Float-sink separation tank<\/li>\n<li>Hot washing tank<\/li>\n<li>Rinsing system<\/li>\n<li>Dewatering machine<\/li>\n<li>Thermal drying system<\/li>\n<\/ul>\n<ol><\/ol>\n<p><!-- \/divi:paragraph --><\/p>\n<p><!-- \/divi:paragraph --><\/p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=&#8221;4.16&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; min_height=&#8221;131.8px&#8221; custom_margin=&#8221;-15px|auto|2px|auto||&#8221; custom_padding=&#8221;2px|12px|5px|||&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.16&#8243; custom_padding=&#8221;|||&#8221; global_colors_info=&#8221;{}&#8221; custom_padding__hover=&#8221;|||&#8221;][et_pb_text _builder_version=&#8221;4.27.4&#8243; text_font=&#8221;Poppins|500|||||||&#8221; text_font_size=&#8221;17px&#8221; text_line_height=&#8221;1.9em&#8221; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; width=&#8221;96.6%&#8221; min_height=&#8221;63.9px&#8221; custom_margin=&#8221;-36px||-1px|||&#8221; custom_padding=&#8221;0px||0px|||&#8221; global_colors_info=&#8221;{}&#8221;]<p>Hot washing typically operates at 60\u201380\u00b0C and uses alkaline detergents to remove oil, adhesive residues, and organic contaminants from PET flakes. Cold washing operates at ambient temperature and is mainly used for surface cleaning and lower-contamination applications.<\/p>\n<ol><\/ol>\n<p><!-- \/divi:paragraph --><\/p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=&#8221;4.16&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; min_height=&#8221;461.8px&#8221; custom_margin=&#8221;-15px|auto|2px|auto||&#8221; custom_padding=&#8221;2px|12px|5px|||&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.16&#8243; custom_padding=&#8221;|||&#8221; global_colors_info=&#8221;{}&#8221; custom_padding__hover=&#8221;|||&#8221;][et_pb_text _builder_version=&#8221;4.27.4&#8243; text_font=&#8221;Poppins|500|||||||&#8221; text_font_size=&#8221;17px&#8221; text_line_height=&#8221;1.9em&#8221; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; min_height=&#8221;263.9px&#8221; custom_margin=&#8221;-3px||-21px|||&#8221; custom_padding=&#8221;0px||0px|||&#8221; global_colors_info=&#8221;{}&#8221;]<h2><strong><b>How Does Hot Washing Work?<\/b><\/strong><\/h2>\n<h2><strong><b>Process Principle<\/b><\/strong><\/h2>\n<p>Hot washing improves PET flake cleanliness through a combination of thermal energy, chemical action, and mechanical friction.<\/p>\n<p>The typical hot washing process includes:<\/p>\n<ol>\n<li><span><\/span>Crushed PET flakes enter the hot washing tank.<\/li>\n<li><span><\/span>Heated water loosens adhesives and organic contamination.<\/li>\n<li><span><\/span>Alkaline chemicals help remove oil, glue, and residue.<\/li>\n<li><span><\/span>Mechanical agitation separates contaminants from PET surfaces.<\/li>\n<li><span><\/span>Clean flakes move to rinsing and drying stages.<\/li>\n<\/ol>\n<h2><strong><b>\u00a0<\/b><\/strong><\/h2>\n<h2><strong><b>Typical Hot Washing Parameters<\/b><\/strong><\/h2>\n<table>\n<tbody>\n<tr>\n<td><strong><b>\u041f\u0430\u0440\u0430\u043c\u0435\u0442\u0440<\/b><\/strong><\/td>\n<td><strong><b>\u0422\u0438\u043f\u0438\u0447\u043d\u044b\u0439 \u0434\u0438\u0430\u043f\u0430\u0437\u043e\u043d<\/b><\/strong><\/td>\n<\/tr>\n<tr>\n<td>\u0422\u0435\u043c\u043f\u0435\u0440\u0430\u0442\u0443\u0440\u0430 \u0432\u043e\u0434\u044b<\/td>\n<td>60-80\u00b0C<\/td>\n<\/tr>\n<tr>\n<td>Washing Time<\/td>\n<td>15 minutes<\/td>\n<\/tr>\n<tr>\n<td>Caustic Soda (NaOH) Concentration<\/td>\n<td>1\u20132%<\/td>\n<\/tr>\n<tr>\n<td>\u0422\u0438\u043f \u043c\u0430\u0442\u0435\u0440\u0438\u0430\u043b\u0430<\/td>\n<td>PET flakes<\/td>\n<\/tr>\n<tr>\n<td>Main Contaminants Removed<\/td>\n<td>Glue, oil, labels, organic residue<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The exact parameters depend on bottle quality, contamination level, and required recycled PET application.<\/p>\n\n\n<h2><strong><b>How Does Cold Washing Work?<\/b><\/strong><\/h2>\n<h2><strong><b>Process Principle<\/b><\/strong><\/h2>\n<p>Cold washing relies mainly on physical cleaning methods rather than chemical reactions.<\/p>\n<p>The process usually includes:<\/p>\n<ol>\n<li><span><\/span>PET bottles are crushed into flakes.<\/li>\n<li><span><\/span>Friction washing removes dirt and loose contaminants.<\/li>\n<li><span><\/span>Float-sink separation removes materials with different densities.<\/li>\n<li><span><\/span>Clean water rinsing reduces remaining particles.<\/li>\n<\/ol>\n<h2><strong><b>\u00a0<\/b><\/strong><\/h2>\n<h2><strong><b>Typical Cold Washing Parameters<\/b><\/strong><\/h2>\n<table>\n<tbody>\n<tr>\n<td><strong><b>\u041f\u0430\u0440\u0430\u043c\u0435\u0442\u0440<\/b><\/strong><\/td>\n<td><strong><b>\u0422\u0438\u043f\u0438\u0447\u043d\u044b\u0439 \u0434\u0438\u0430\u043f\u0430\u0437\u043e\u043d<\/b><\/strong><\/td>\n<\/tr>\n<tr>\n<td>\u0422\u0435\u043c\u043f\u0435\u0440\u0430\u0442\u0443\u0440\u0430 \u0432\u043e\u0434\u044b<\/td>\n<td>25\u201340\u00b0C<\/td>\n<\/tr>\n<tr>\n<td>Washing Method<\/td>\n<td>Mechanical friction<\/td>\n<\/tr>\n<tr>\n<td>Energy Consumption<\/td>\n<td>\u041d\u0438\u0436\u0435<\/td>\n<\/tr>\n<tr>\n<td>Chemical Usage<\/td>\n<td>Minimal<\/td>\n<\/tr>\n<tr>\n<td>Main Contaminants Removed<\/td>\n<td>Dust, sand, surface dirt<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Cold washing is suitable for relatively clean PET waste streams where contamination levels are low.<\/p>\n\n\n<h2><strong><b>Hot Washing vs Cold Washing: Key Differences<\/b><\/strong><\/h2>\n<table>\n<tbody>\n<tr>\n<td><strong><b>Comparison<\/b><\/strong><\/td>\n<td><strong><b>Hot Washing<\/b><\/strong><\/td>\n<td><strong><b>Cold Washing<\/b><\/strong><\/td>\n<\/tr>\n<tr>\n<td>Cleaning Ability<\/td>\n<td>\u0412\u044b\u0441\u043e\u043a\u0438\u0439<\/td>\n<td>\u0421\u0440\u0435\u0434\u043d\u0438\u0439<\/td>\n<\/tr>\n<tr>\n<td>Energy Consumption<\/td>\n<td>\u0412\u044b\u0448\u0435<\/td>\n<td>\u041d\u0438\u0436\u0435<\/td>\n<\/tr>\n<tr>\n<td>Chemical Usage<\/td>\n<td>Required<\/td>\n<td>\u041e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u043d\u044b\u0439<\/td>\n<\/tr>\n<tr>\n<td>Adhesive Removal<\/td>\n<td>Excellent<\/td>\n<td>\u041e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u043d\u044b\u0439<\/td>\n<\/tr>\n<tr>\n<td>Oil Removal<\/td>\n<td>Effective<\/td>\n<td>\u0423\u043c\u0435\u0440\u0435\u043d\u043d\u044b\u0439<\/td>\n<\/tr>\n<tr>\n<td>Equipment Cost<\/td>\n<td>\u0412\u044b\u0448\u0435<\/td>\n<td>\u041d\u0438\u0436\u0435<\/td>\n<\/tr>\n<tr>\n<td>Suitable Materials<\/td>\n<td>Post-consumer PET bottles<\/td>\n<td>Cleaner PET waste<\/td>\n<\/tr>\n<tr>\n<td>\u041f\u0435\u0440\u0435\u0440\u0430\u0431\u043e\u0442\u043a\u0430 \u0438\u0437 \u0431\u0443\u0442\u044b\u043b\u043a\u0438 \u0432 \u0431\u0443\u0442\u044b\u043b\u043a\u0443<\/td>\n<td>Recommended<\/td>\n<td>Usually insufficient<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n<h2><strong><b>Benefits of Hot Washing in PET Recycling<\/b><\/strong><\/h2>\n<ol><\/ol>\n<p><!-- \/divi:paragraph --><\/p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=&#8221;1_3,1_3,1_3&#8243; _builder_version=&#8221;4.16&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; min_height=&#8221;325.1px&#8221; custom_margin=&#8221;-8px|auto|-13px|auto||&#8221; custom_padding=&#8221;106px||5px|||&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;1_3&#8243; _builder_version=&#8221;4.16&#8243; custom_padding=&#8221;|||&#8221; global_colors_info=&#8221;{}&#8221; custom_padding__hover=&#8221;|||&#8221;][et_pb_text _builder_version=&#8221;4.27.4&#8243; text_font=&#8221;Poppins|500|||||||&#8221; text_font_size=&#8221;17px&#8221; text_line_height=&#8221;1.9em&#8221; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; width=&#8221;104.7%&#8221; min_height=&#8221;315.7px&#8221; custom_margin=&#8221;-92px|-283px|-20px|||&#8221; custom_padding=&#8221;0px|0px|0px|||&#8221; global_colors_info=&#8221;{}&#8221;]<h2><strong><b>Higher PET Flake Purity<\/b><\/strong><\/h2>\n<p>Hot washing removes difficult contaminants that affect PET quality, including:<\/p>\n<ul>\n<li>Bottle labels<\/li>\n<li>Adhesive residues<\/li>\n<li>Beverage residues<\/li>\n<li>Food contamination<\/li>\n<li>Oil contamination<\/li>\n<\/ul>\n<p>Higher purity PET flakes improve the performance of downstream processes such as pelletizing and extrusion.<\/p>\n<ol><\/ol>\n<p><!-- \/divi:paragraph --><\/p>\n<p><!-- \/divi:paragraph --><\/p>[\/et_pb_text][\/et_pb_column][et_pb_column type=&#8221;1_3&#8243; _builder_version=&#8221;4.16&#8243; custom_padding=&#8221;|||&#8221; global_colors_info=&#8221;{}&#8221; custom_padding__hover=&#8221;|||&#8221;][et_pb_text _builder_version=&#8221;4.27.4&#8243; text_font=&#8221;Poppins|500|||||||&#8221; text_font_size=&#8221;17px&#8221; text_line_height=&#8221;1.9em&#8221; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; width=&#8221;94.7%&#8221; min_height=&#8221;315.7px&#8221; custom_margin=&#8221;-92px|-283px|-20px|||&#8221; custom_padding=&#8221;0px|0px|0px|||&#8221; global_colors_info=&#8221;{}&#8221;]<h2><strong><b>Better Recycling Applications<\/b><\/strong><\/h2>\n<p>High-quality washed PET flakes can be used for:<\/p>\n<ul>\n<li>PET sheet production<\/li>\n<li>Fiber manufacturing<\/li>\n<li>Strapping production<\/li>\n<li>Bottle-to-bottle recycling applications<\/li>\n<\/ul>\n<p>For food-grade recycling applications, additional purification processes may be required depending on regional regulations.<\/p>\n<ol><\/ol>\n<p><!-- \/divi:paragraph --><\/p>\n<p><!-- \/divi:paragraph --><\/p>[\/et_pb_text][\/et_pb_column][et_pb_column type=&#8221;1_3&#8243; _builder_version=&#8221;4.16&#8243; custom_padding=&#8221;|||&#8221; global_colors_info=&#8221;{}&#8221; custom_padding__hover=&#8221;|||&#8221;][et_pb_image src=&#8221;https:\/\/slecotech.com\/wp-content\/uploads\/2026\/07\/Hot-Wash-vs.-Cold-Wash-Comparison-Infographic-1.jpg&#8221; _builder_version=&#8221;4.27.4&#8243; _module_preset=&#8221;default&#8221; width=&#8221;93.9%&#8221; min_height=&#8221;396.9px&#8221; custom_margin=&#8221;-86px|||-12px||&#8221; hover_enabled=&#8221;0&#8243; global_colors_info=&#8221;{}&#8221; sticky_enabled=&#8221;0&#8243;][\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=&#8221;4.16&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; min_height=&#8221;461.8px&#8221; custom_margin=&#8221;-15px|auto|2px|auto||&#8221; custom_padding=&#8221;2px|12px|5px|||&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.16&#8243; custom_padding=&#8221;|||&#8221; global_colors_info=&#8221;{}&#8221; custom_padding__hover=&#8221;|||&#8221;][et_pb_text _builder_version=&#8221;4.27.4&#8243; text_font=&#8221;Poppins|500|||||||&#8221; text_font_size=&#8221;17px&#8221; text_line_height=&#8221;1.9em&#8221; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; min_height=&#8221;364.9px&#8221; custom_margin=&#8221;30px||-1px|||&#8221; custom_padding=&#8221;0px||0px|||&#8221; global_colors_info=&#8221;{}&#8221;]<h2><strong><b>Common Problems in PET Washing Processes<\/b><\/strong><\/h2>\n<h2><strong><b>Problem 1: Excessive Glue Residue<\/b><\/strong><\/h2>\n<h3><strong><b>Cause:<\/b><\/strong><\/h3>\n<p>Low washing temperature or insufficient residence time.<\/p>\n<h3><strong><b>Solution:<\/b><\/strong><\/h3>\n<p>Optimize hot washing temperature and chemical concentration to improve adhesive removal.<\/p>\n<h2><strong><b>\u00a0<\/b><\/strong><\/h2>\n<h2><strong><b>Problem 2: High Moisture Content After Washing<\/b><\/strong><\/h2>\n<h3><strong><b>Cause:<\/b><\/strong><\/h3>\n<p>Insufficient dewatering efficiency.<\/p>\n<h3><strong><b>Solution:<\/b><\/strong><\/h3>\n<p>Use high-speed dewatering equipment and thermal drying systems to reduce residual moisture.<\/p>\n<h2><strong><b>\u00a0<\/b><\/strong><\/h2>\n<h2><strong><b>Problem 3: Mixed Plastic Contamination<\/b><\/strong><\/h2>\n<h3><strong><b>Cause:<\/b><\/strong><\/h3>\n<p>Incomplete sorting before washing.<\/p>\n<h3><strong><b>Solution:<\/b><\/strong><\/h3>\n<p>Improve bottle sorting and integrate advanced separation technologies.<\/p>\n\n\n<h2><strong><b>Solutions for Efficient PET Washing Lines<\/b><\/strong><\/h2>\n<p>A complete PET recycling system should combine multiple technologies rather than relying on one cleaning method.<\/p>\n<p>Recommended process:<\/p>\n<p><strong><span>Sorting \u2192 Label Removal \u2192 Crushing \u2192 Friction Washing \u2192 Float-Sink Separation \u2192 Hot Washing \u2192 Rinsing \u2192 Dewatering \u2192 Drying<\/span><\/strong><\/p>\n<p>This integrated approach improves:<\/p>\n<ul>\n<li>PET flake purity<\/li>\n<li>Production stability<\/li>\n<li>Equipment protection<\/li>\n<li>Recycling efficiency<\/li>\n<\/ul>\n<p>Streamline Eco Tech provides PET bottle recycling solutions integrating crushers, washing systems, separation equipment, and drying technologies. The company develops customized PET washing lines according to raw material conditions, production capacity requirements, and recycled material quality targets.<\/p>\n\n\n<h2><strong><b>FAQ: Hot Washing vs Cold Washing in PET Recycling<\/b><\/strong><\/h2>\n<h2><strong><b>Is hot washing necessary for PET bottle recycling?<\/b><\/strong><\/h2>\n<p>Hot washing is recommended when PET bottles contain high levels of adhesives, oils, food residues, or post-consumer contamination.<\/p>\n<h2><strong><b>\u00a0<\/b><\/strong><\/h2>\n<h2><strong><b>Can cold washing produce high-quality PET flakes?<\/b><\/strong><\/h2>\n<p>Cold washing can produce acceptable PET flakes for some applications, but it may not remove strong contamination required for higher-quality recycling.<\/p>\n<h2><strong><b>\u00a0<\/b><\/strong><\/h2>\n<h2><strong><b>What is the best washing method for bottle-to-bottle recycling?<\/b><\/strong><\/h2>\n<p>Bottle-to-bottle recycling generally requires advanced cleaning technologies, including hot washing, advanced separation, and additional purification processes.<\/p>\n\n\n<h2><strong><b>\u0417\u0430\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0435<\/b><\/strong><\/h2>\n<p>Hot washing provides stronger contaminant removal and higher PET flake quality, while cold washing offers a lower-cost solution for cleaner materials. The correct choice depends on raw material contamination, recycling targets, and final PET application requirements.<\/p>\n<ol><\/ol>\n<p><!-- \/divi:paragraph --><\/p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<div class=\"slecotech-blog-cta\" style=\"margin-top:32px;padding:24px;border:1px solid #e5e7eb;border-radius:8px;background:#f8fafc;\">\n<h2>Need a PET Recycling Washing Solution?<\/h2>\n<p>SLECOTECH provides plastic washing, shredding and customized recycling equipment for PET bottle recycling lines.<\/p>\n<p><a href=\"https:\/\/slecotech.com\/ru\/%d0%bf%d1%80%d0%be%d0%b4%d1%83%d0%ba%d1%82%d1%8b-%d1%80%d0%b0%d1%86%d0%b8%d0%be%d0%bd%d0%b0%d0%bb%d0%b8%d0%b7%d0%b8%d1%80%d1%83%d1%8e%d1%82-%d1%8d%d0%ba%d0%be%d1%82%d0%b5%d1%85%d0%bd%d0%be%d0%bb%d0%be\/\" style=\"display:inline-block;margin-right:12px;padding:10px 16px;background:#0b5cab;color:#fff;text-decoration:none;border-radius:4px;\">View Recycling Equipment<\/a><a href=\"https:\/\/slecotech.com\/ru\/contact\/\" style=\"display:inline-block;padding:10px 16px;border:1px solid #0b5cab;color:#0b5cab;text-decoration:none;border-radius:4px;\">\u0421\u0432\u044f\u0436\u0438\u0442\u0435\u0441\u044c \u0441 \u043d\u0430\u043c\u0438<\/a><\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Hot washing and cold washing are two key cleaning methods in PET bottle recycling. This article explains their differences, operating principles, cleaning performance, and how recyclers choose the right washing process for producing high-quality PET flakes.<\/p>","protected":false},"author":2,"featured_media":1868,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"<!-- wp:paragraph -->\n<p><strong><strong>1. Overview of Single-Shaft Shredders<\/strong><\/strong><\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:paragraph -->\n<p>The single-shaft shredder is an industrial crushing device designed with a single rotating shaft and blades. Driven by a motor, it cuts, tears, and grinds materials. Compact in structure and highly adaptable, it is widely used to process plastics, wood, rubber, thin metal sheets, and more, particularly in small-to-medium-scale waste recycling scenarios.<\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:image {\"id\":112,\"sizeSlug\":\"full\",\"linkDestination\":\"none\"} -->\n<figure class=\"wp-block-image size-full\"><img src=\"http:\/\/49.51.38.20\/wp-content\/uploads\/2025\/01\/Single-shaft-shredder-1.png\" alt=\"\" class=\"wp-image-112\"\/><\/figure>\n<!-- \/wp:image -->\n\n<!-- wp:paragraph -->\n<p><strong>2. Core Structure &amp; Working Principle<\/strong><\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:paragraph -->\n<p><strong>Key Components<\/strong><\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:list -->\n<ul class=\"wp-block-list\"><!-- wp:list-item -->\n<li><strong>Blade Shaft System<\/strong>: Multiple sets of carbide blades mounted on a single shaft, driven by hydraulics or a motor for high-speed rotation;<\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li><strong>Screen Mesh<\/strong>: Replaceable mesh at the bottom controls output particle size;<\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li><strong>Enclosed Chamber<\/strong>: Sealed structure reduces noise and dust emissions<\/li>\n<!-- \/wp:list-item --><\/ul>\n<!-- \/wp:list -->\n\n<!-- wp:paragraph -->\n<p><strong>Working Process<\/strong><\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:paragraph -->\n<p>Materials are fed into the hopper, where blades decompose waste into uniform fragments through a combination of shearing and tearing. Particles meeting the mesh size are discharged automatically, while oversized fragments undergo repeated crushing.<\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:paragraph -->\n<p><strong>Applications &amp; Advantages<\/strong><\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:paragraph -->\n<p><strong>Typical Applications<\/strong><\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:list -->\n<ul class=\"wp-block-list\"><!-- wp:list-item -->\n<li><strong>Plastic Recycling<\/strong>: Shredding PET bottles, films, and injection molding scraps to improve recycled pellet production efficiency;<\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li><strong>Wood Processing<\/strong>: Crushing furniture waste and branches to generate raw materials for biomass fuel;<\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li><strong>E-Waste Recycling<\/strong>: Decomposing circuit boards and cables to separate metals from plastics.<\/li>\n<!-- \/wp:list-item --><\/ul>\n<!-- \/wp:list -->\n\n<!-- wp:paragraph -->\n<p><strong>Key Advantages<\/strong><\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:list -->\n<ul class=\"wp-block-list\"><!-- wp:list-item -->\n<li><strong>Low-Speed, High-Torque<\/strong>: Handles hard or tough materials while minimizing jamming risks;<\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li><strong>Customizable<\/strong>: Blade shapes and screen mesh sizes can be adjusted for specific needs;<\/li>\n<!-- \/wp:list-item -->\n\n<!-- wp:list-item -->\n<li><strong>Easy Maintenance<\/strong>: Modular design enables rapid replacement of worn parts.<\/li>\n<!-- \/wp:list-item --><\/ul>\n<!-- \/wp:list -->\n\n<!-- wp:paragraph -->\n<p><\/p>\n<!-- \/wp:paragraph -->","_et_gb_content_width":"1080","_swpsp_post_exclude":false,"footnotes":""},"categories":[31,30],"tags":[],"class_list":["post-1854","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge","category-recycling-production-lines-recycling-systems"],"yoast_head":"<!-- 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