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Apparatus for Measuring Tack

IP.com Disclosure Number: IPCOM000046638D
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 26K

Publishing Venue

IBM

Related People

Beechner, M: AUTHOR [+2]

Abstract

This apparatus will accurately measure the tack, i.e., stickiness, of various viscous materials, for example, conductive screening paste, vehicles and combinations thereof. In packaging technology electrically conductive lines are formed on substrates from conductive paste materials commonly deposited by screening techniques on ceramic substrates either before or after sintering. The tackiness of the material is a consideration in processing. For example, in using a three-roll mill the vehicle of the paste must maintain a certain tack to adhere to the surface of rotating rollers dragging the agglomerates into the roll nip to achieve particle dispersion.

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Apparatus for Measuring Tack

This apparatus will accurately measure the tack, i.e., stickiness, of various viscous materials, for example, conductive screening paste, vehicles and combinations thereof. In packaging technology electrically conductive lines are formed on substrates from conductive paste materials commonly deposited by screening techniques on ceramic substrates either before or after sintering. The tackiness of the material is a consideration in processing. For example, in using a three-roll mill the vehicle of the paste must maintain a certain tack to adhere to the surface of rotating rollers dragging the agglomerates into the roll nip to achieve particle dispersion. This tack-measuring apparatus has a primary roller 10 supported on a roll friction carriage (not shown), a rotor 12 on which is coiled wire 14, a standard motor drive 16 arranged to rotate rotor 12, and a torque indicator 18. In order to operate the apparatus a layer of paste or other material to be measured is first applied to a sheet of MYLAR* 20. One end of the MYLAR sheet 20 is then attached to the primary roller 10 which is locked in position. A secondary roller (not shown) is pivoted up against the sheet 20 on the primary roller and is held in position by a constant spring tension. When the primary roller is rotated rolling up the MYLAR sheet, it causes the paste to be sandwiched between the two MYLAR sheet surfaces. The free end of the sheet is then secured to the framework by a...