{"id":3665,"date":"2023-11-14T07:18:40","date_gmt":"2023-11-14T00:18:40","guid":{"rendered":"https:\/\/asg.vn\/?p=3665"},"modified":"2023-11-14T07:19:06","modified_gmt":"2023-11-14T00:19:06","slug":"elementor-3504-5","status":"publish","type":"post","link":"https:\/\/asg.vn\/en\/elementor-3504-5\/","title":{"rendered":"PLASTIC DRYING: THINGS YOU NEED TO KNOW TO ENSURE PRODUCT QUALITY"},"content":{"rendered":"


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I.WHAT DOES THE DRYRING THE PLASTIC MEAN ,WHY DO WE NEED TO DRYING THE PLASTIC? <\/strong><\/h1>\n

I.1 what does the plastic drying mean?<\/strong><\/h3>\n

\ud83d\udd39 Plastic drying is the process of drying (removing water) from plastic.<\/p>\n

\ud83d\udd39 Plastic drying is a mandatory step before putting plastic into the plastic injection machine to create products.<\/p>\n

I.2 why we need to dry the plastic?<\/strong><\/h3>\n

To understand why we need to dry plastic, we need to understand the operating principles of plastic injection machines. Plastic is put into the plastic injection machine to be produced in granular form, after being heated by heat cycles, it changes to a liquid state and is then injected into the mold to shape the product. Refer to the operating process through the following video:<\/p>\n

https:\/\/asg.vn\/wp-content\/uploads\/2023\/11\/Injection-Molding-Animation-2.mp4<\/p>\n

\ud83d\udd39 Question:<\/strong> If plastic with high moisture content (not yet dried) is put into production, what will happen?<\/p>\n

Answers<\/strong>In a high temperature environment (200-400 degrees Celsius), the water in the plastic will evaporate, taking up the volume of the plastic, thereby causing product errors.<\/p>\n

\ud83d\udd39 Air bubble <\/strong><\/p>\n

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\ud83d\udd39 Silver streak<\/strong><\/p>\n

\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"\"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/p>\n

Water reacts with molten polymers at high temperatures, called a hydrolysis reaction, causing a change in the polymer molecular structure, causing the product to have poorer physical properties, reducing impact resistance and elasticity. Anise.<\/p>\n

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II. Plastic drying method<\/strong><\/h1>\n

II.1 Plastic drying mode<\/strong><\/h3>\n

\ud83d\udd39 Each type of plastic has different hygroscopicity and heat resistance properties, so there will be different plastic drying modes.<\/p>\n

\ud83d\udd39 Each region with a different climate will have a different drying mode (Vietnam has high environmental humidity, a lot of water in plastic, different from environments with low humidity)<\/p>\n

\u279c Below is the recommended drying mode for plastics suitable for the climate in Vietnam<\/p>\n

No. Plastic type Drying temperature Drying time (hours)<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
1<\/td>\nLCP<\/td>\n110 \u223c 150<\/td>\n4 \u223c 8<\/td>\n<\/tr>\n
2<\/td>\nPEEK<\/td>\n150<\/td>\n6 \u223c 8<\/td>\n<\/tr>\n
3<\/td>\nPPS<\/td>\n140 \u223c 250<\/td>\n3 \u223c 6<\/td>\n<\/tr>\n
4<\/td>\nPSU<\/td>\n120 \u223c 150<\/td>\n3 \u223c 4<\/td>\n<\/tr>\n
5<\/td>\nABS<\/td>\n80 \u223c 90<\/td>\n2 \u223c 3<\/td>\n<\/tr>\n
6<\/td>\nPMMA<\/td>\n70 \u223c 100<\/td>\n2 \u223c 6<\/td>\n<\/tr>\n
7<\/td>\nPC<\/td>\n120<\/td>\n4 \u223c 6<\/td>\n<\/tr>\n
8<\/td>\nPA6<\/td>\n80<\/td>\n8 \u223c 15<\/td>\n<\/tr>\n
9<\/td>\nPA66<\/td>\n80<\/td>\n8 \u223c 15<\/td>\n<\/tr>\n
10<\/td>\nPA11<\/td>\n70 \u223c 80<\/td>\n8 \u223c 15<\/td>\n<\/tr>\n
11<\/td>\nPA46<\/td>\n80<\/td>\n8 \u223c 10<\/td>\n<\/tr>\n
12<\/td>\nPOM<\/td>\n110<\/td>\n2 \u223c 3<\/td>\n<\/tr>\n
13<\/td>\nPBT<\/td>\n120<\/td>\n4 \u223c 5<\/td>\n<\/tr>\n
14<\/td>\nPET<\/td>\n130 \u223c 140<\/td>\n4 \u223c 8<\/td>\n<\/tr>\n
15<\/td>\nGPPS<\/td>\n80 \u223c 90<\/td>\n4 \u223c 8<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

II.2 Plastic drying process<\/strong><\/h3>\n