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  • TECHPAP

    TECHPAP

    Dynamic Handsheet Former
    모델
    -
    시리즈
    Lab Equipment

    제품 소개

    FDA - Automated Dynamic Handsheet Former

     

    Principle

    The uniqueness of the FDA resides in its handsheet formation principle which is completely different from classic handsheet formers. In fact, the FDA uses a process very similar to industrial PM sheet production. The sheet is formed by the projection of pulp on a wire positioned on the ID of a rotating cylindrical jar. The wire is completely submerged in a water wall. The pulp projection is accomplished using an injector nozzle fixed on a delivery tube sweeping vertically up and down inside the rotating cylindrical jar. The final basis weight of the sheet depends on the consistency of the pulp, the number of nozzle sweeps and the pulp flow. A scoop system bails out the water wall after the sheet is formed and the water remaining in the sheet is drained by centrifugal force. After the sheet is drained it can be removed along with the wire from the cylindrical jar for pressing and drying.

     

    Advantages

    The main advantages include:

    • The handsheet shape is rectangular.
    • Sheet lookthrough is excellent.
    • The fiber orientation is dependent on jet to wire speed ratio (both are adjustable); therefore, it is possible to obtain orientated handsheets.
    • The retention of fillers, chemicals or dyes is excellent.
    • The distribution of elements in the sheet thickness is similar to a PM produced sheets.
    • A large range of fiber types can be used; short or long fibers, synthetic fibers (non hydrophobia), recycled fibers, nonwood fibers, etc.
    • A large range of basis weight sheets can be made from fine papers to board.
    • It is easy to make bijet or multi jet sheets with excellent adhesion between the various grades.
    • Rectangular handsheets can be pressed, dried, calendared, coated or sized, and tested as normal paper.

    생산 제품

    Sensors

    2D Formation Sensor
    Edge Crack Detector
    Web Break Supervisor
    Dirt&Shives Analysis
    Pulp Inspector (PI)
    PI Fiber Morpholgy
    PI Color&Brightness
    PI Freeness
    PI Dirt&Shives
    NIR Moisture & Plastic
    On Line HR3D

    Lab Device

    Fiber&Shive Analyzer - MorFi Neo
    Fiber Wall Thickness
    Laboratory Dirty Analyzer
    2D Formation Sensor
    Mottling Sensor-Kheops
    Fiber Orientation Analyzer
    Paper Stability&Creeping
    Humidity Generator
    Calipack Migration Cell
    Slosh Box
    3D Stick
    Lab HR3D
    Dirt analyser for large size samples

    Lab Equipment

    Dynamic Handsheet Former
    Handsheet Retention Tester
    Laboratory Equipment