PET瓶胚专用干燥机

PET瓶胚专用干燥机，PET瓶胚结晶机，PET瓶胚干燥机PET 瓶胚专用干燥机 中英文双语同步介绍
PET 瓶胚专用干燥机是专为 PET 瓶胚注塑工艺研发的聚酯切片深度干燥专用设备，以预结晶 + 低露点除湿干燥为核心，精准适配瓶胚注塑对原料含水率、结晶度的严苛要求，是瓶胚量产的核心前道工艺设备。
PET preform special dryer is a special equipment for deep drying of polyester chips developed exclusively for the PET preform injection moulding process, with pre-crystallization + low dew point dehumidification drying as the core, accurately adapting to the stringent requirements of preform injection moulding for raw material moisture content and crystallinity, and is the core front-end process equipment for mass preform production.
该设备针对 PET 瓶胚注塑（含普通饮料瓶、热灌装瓶、医药食品级瓶胚）的工艺特性专项设计，可将 PET 切片含水率稳定降至 **≤20ppm**，结晶度精准控制在25%~35%，全程密闭防二次吸湿，且能与瓶胚注塑机联动供料，完全匹配 48~320 腔高腔数模具的高速注塑节拍。
Designed specifically for the process characteristics of PET preform injection moulding (including ordinary beverage bottles, hot-fill bottles, pharmaceutical and food-grade preforms), the equipment can stably reduce the moisture content of PET chips to ≤20ppm, accurately control the crystallinity at 25%~35%, prevent secondary moisture absorption with full-process airtightness, and can realize linked feeding with preform injection moulding machines, fully matching the high-speed injection cycle of high-cavity moulds from 48 to 320 cavities.
设备区别于常规 PET 干燥机，具备露点更稳定、控温更精准、密闭性更强、注塑联动性优等特点，适配食品、饮料、医药日化等行业的 PET 瓶胚规模化生产，是保障瓶胚无气泡、无发白、力学性能达标的关键设备。
Different from conventional PET dryers, the equipment has the characteristics of more stable dew point, more precise temperature control, stronger airtightness and excellent injection interconnection performance, adapted to the large-scale production of PET preforms in food, beverage, pharmaceutical and daily chemical industries, and is a key equipment to ensure that preforms are free of bubbles and whitening and meet mechanical performance standards.
一、设备应用核心必要性
PET 为强吸湿性高分子材料，常温下易吸附空气中的水汽，而瓶胚注塑为高温高压工艺（料筒温度 270~290℃），切片含水率超标会直接导致生产失效。
PET is a highly hygroscopic polymer material that easily absorbs water vapor in the air at room temperature, while preform injection moulding is a high-temperature and high-pressure process (barrel temperature 270~290℃), and excessive moisture content of chips will directly lead to production failure.
If the moisture content of PET chips exceeds 20ppm, severe hydrolysis will occur during high-temperature injection moulding, leading to bubbles, whitening, foggy spots and shrinkage marks on the preform surface.
若 PET 切片含水率＞20ppm，高温注塑时会发生剧烈水解，导致瓶胚表面出现气泡、发白、雾斑、缩痕等缺陷，力学性能大幅下降，后续吹瓶易破裂、壁厚不均，废品率可达 3%~5%。
If the moisture content of PET chips exceeds 20ppm, severe hydrolysis will occur during high-temperature injection moulding, leading to defects such as bubbles, whitening, foggy spots and shrinkage marks on the preform surface, a sharp drop in mechanical properties, and easy cracking and uneven wall thickness in subsequent bottle blowing, with a scrap rate of up to 3%~5%.
瓶胚注塑多为高腔数、高射速连续生产，单模周期仅 3~5s，对原料供应的连续性、均匀性要求极高，常规 PET 干燥机存在露点波动大、易二次吸湿、供料不同步等问题，无法适配瓶胚注塑工艺。
Preform injection moulding is mostly continuous production with high cavity number and high injection speed, with a single mould cycle of only 3~5s, which has extremely high requirements for the continuity and uniformity of raw material supply. Conventional PET dryers have problems such as large dew point fluctuations, easy secondary moisture absorption and asynchronous feeding, which cannot adapt to the preform injection moulding process.
PET 瓶胚专用干燥机通过定型预结晶 + 深度低露点干燥 + 全程密闭输送，从根源上解决 PET 水解问题，同时实现与注塑机的精准联动，保证原料连续稳定供应，将瓶胚废品率降至 0.5% 以下，是瓶胚规模化生产的必备设备。
Through shaping pre-crystallization + deep low dew point drying + full-process airtight conveying, the PET preform special dryer fundamentally solves the problem of PET hydrolysis, and at the same time realizes precise interconnection with the injection moulding machine to ensure continuous and stable supply of raw materials, reducing the preform scrap rate to below 0.5%, and is an essential equipment for large-scale preform production.
不同等级瓶胚对干燥品质要求逐级提升，医药 / 食品级瓶胚需将切片含水率降至≤10ppm，仅有专用干燥机可实现该工艺要求，满足 FDA、GMP 等国际认证标准。
The requirements for drying quality of different grades of preforms increase step by step. Pharmaceutical/food-grade preforms need to reduce the chip moisture content to ≤10ppm, and only special dryers can meet this process requirement and comply with international certification standards such as FDA and GMP.