Product Introduction
The Flat sheet dryer operates on the contact hot-press drying principle. The wet handsheet is placed on the precision-ground heating plate and covered with a breathable heat-resistant fabric. The self-weight of the top cover applies a constant pressure to the sheet during the entire drying cycle. Heating elements are evenly distributed across the full dimensions of the drying plate, and a digital temperature controller maintains the set temperature with high precision, allowing the sheet to dry uniformly under controlled pressure. The breathable fabric cover allows rapid steam venting, preventing moisture-related surface defects. This method delivers flat, strong, and smooth sheets ready for physical testing.

Key Features 
Flat-Plate Pressure Drying The 23 kg top cover applies constant pressure to the sheet during drying, effectively preventing curling and cockling while improving tensile strength and surface smoothness.
Precision Digital Temperature Control Digital controller with a range from ambient to 180°C and stability ≤±1°C ensures identical drying conditions for long-duration heating.
Full-Size Uniform Heating 1500 W heating elements are distributed across the entire plate area, guaranteeing even heat distribution and eliminating localized overheating.
Rapid Steam Venting A precision-ground plate surface combined with the breathable fabric cover allows fast steam escape, resulting in more uniform sheet drying.
Large Drying Plate Area The 600 × 350 mm plate accommodates multiple standard handsheets simultaneously or larger sheet specimens, improving workflow efficiency.
Wide Sample Compatibility Supports sheet thicknesses from 0 to 15 mm, suitable for handsheets of various grammages, tobacco sheets, and other wet-laid samples.
Simple and Reliable Operation A straightforward three-step process—place sample, cover, and set temperature—requires no complex training. The robust construction ensures long service life.
Seamless System Integration Designed to pair perfectly with all standard sheet formers, completing the laboratory sample preparation system from sheet formation to final drying.

Main Technical Specifications

FAQ 
1. What is the difference between the flat sheet dryer and the curved rapid sheet dryer? How should I choose?
The flat dryer applies pressure to the sheet via the self-weight of the top cover during drying, resulting in higher tensile strength and smoothness. The curved dryer mimics the shape of an industrial dryer cylinder and focuses on preventing curl without applied pressure. Choose the flat dryer when enhanced physical properties are desired; choose the curved dryer for curl prevention without pressure requirements.

2. What drying temperature is recommended? Can it be used for high-temperature rapid drying?
The recommended drying temperature is 105°C, the standard temperature that simulates the surface of a paper machine dryer cylinder. The unit supports settings from ambient to 180°C. Higher temperatures reduce drying time, but excessively high temperatures may affect sheet color and fiber strength.

3. Is the pressure applied by the top cover fixed? Can it be adjusted?
The drying pressure comes from the approximately 23 kg self-weight of the top cover and is a fixed design. This pressure has been optimized to meet the needs of most handsheet drying applications. Custom solutions with higher or adjustable pressure are available upon request.

4. The plate is 600×350 mm; how many standard handsheets can be dried at once?
Multiple standard φ159 mm circular handsheets (typically 4-6) can be arranged and dried simultaneously, depending on the specific layout. The plate can also accommodate larger sheet specimens.

5. How should the breathable fabric cover be cleaned and maintained?
After use and once the unit has cooled, remove the fabric cover and rinse with clean water or gently wipe clean. The heat-resistant fabric is designed for long-term use. Replacements are available from Shandong Annimet if the cover becomes damaged or heavily soiled.

6. Do dried sheets require further conditioning before testing?
Yes. Dried sheets should be conditioned in a standard atmosphere (e.g., 23°C and 50% RH) for at least 4 hours before conducting tensile strength, burst, smoothness, or other physical tests to ensure data accuracy and reproducibility.

After-Sales Service 
Established in 2007 and with nearly two decades of experience, Shandong Annimet Instrument Co., Ltd. is a professional manufacturer integrating R&D, production, and sales of laboratory testing and sample preparation equipment. Quality is our foundation. We are your bridge from concept to reality. We deliver more than just instruments — we deliver confidence. This Flat Sheet Dryer comes with a 12-month warranty and lifetime technical support. Our professional team offers 24/7 service response, free installation guidance, operation training, and drying process consultation. For any inquiries, please contact our customer service team; we are dedicated to providing comprehensive pre-sales, in-sales, and after-sales support. Hotline: 400-9933-057, Email: anmt_test@126.com.