What is MD and TD?
What is MD and TD?
MD and TD are the machine and transverse direction orientation. (TD is also called the crossmachine direction and is designated as CD.)
What is cross machine direction?
On a papermaking machine, the direction perpendicular to the direction in which the paper web travels as it is forming. The cross-machine direction is also called the cross-grain direction. …
What is CD and MD?
What is it. Honeywell’s Experion® MX Machine Direction (MD) and Cross Direction (CD) Controls utilize multivariable model predictive control technology to ensure product quality and paper machine runnability.
What is transverse direction orientation?
Transverse direction orientation of plastic film and sheet is accomplished by heating the web and stretching it in the transverse (or cross) direction on a tenter frame. The tenter frame consists of two horizontal chain tracks, on which clip and chain assemblies ride, enclosed in an oven.
Is lateral and transverse the same?
As adjectives the difference between lateral and transverse is that lateral is to the side; of or pertaining to the side while transverse is situated or lying across; side to side, relative to some defined “forward” direction.
What is longitudinal direction?
That direction parallel to the direction of maximum elongation in a worked material. See also normal direction and transverse direction.
What is machine direction and cross direction in paper?
Paper has a definite grain direction due to greater orientation of fibres in the direction of travel of the paper machine. This grain direction is known as machine direction. The cross direction is the direction of paper at right angles to the machine direction.
What is transverse direction?
Literally, “across,” usually signifying a direction or plane perpendicular to the direction of working. In rolled plate or sheet, the direction across the width is often called long transverse; the direction through the thickness, short transverse.
Is transverse the same as perpendicular?
As adjectives the difference between transverse and perpendicular. is that transverse is situated or lying across; side to side, relative to some defined “forward” direction while perpendicular is (geometry) at or forming a right angle (to).
How does machine direction orientation ( MDO ) work?
Machine direction orientation (MDO) is accomplished by drawing the film or sheet between rolls rotating at different speeds, with the second set of rolls running faster than the first set (see Fig. 4.130 ). The first set of rolls stabilizes the sheet surface temperature and allows time for inner sheet temperature balance.
Which is the correct definition of machine direction?
machine direction. noun. : the direction in which the stock flows onto the paper machine wire : the circumferential direction of a roll of paper. also : the corresponding dimension of a sheet cut from it. — called also grain, grain direction. — compare cross direction.
When is film stretched in the machine direction?
When a film is MD oriented, it is stretched in the MD only. In either simultaneous or sequential biaxial orientation, the film is stretched in both the machine direction and the transverse direction (TD). An MDO machine is a stack of usually separately driven rolls mounted in side frames for support.
Which is the machine and transverse direction orientation?
MD and TD are the machine and transverse direction orientation. (TD is also called the crossmachine direction and is designated as CD.) The property ratios depend on the bubble size and draw ratio. A large bubble size provides more transverse direction orientation, and high draw ratios provide more machine direction orientation.