Unlock instant, AI-driven research and patent intelligence for your innovation.

Stretchable electrically-conductive adhesive tape

A conductive bonding and adhesive layer technology, applied in conductive adhesives, film/sheet adhesives, adhesives, etc. Effects of external stress and chemical exposure, enhancing electrical stability

Inactive Publication Date: 2019-03-15
3M INNOVATIVE PROPERTIES CO
View PDF18 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Currently commercially available conductive pressure-sensitive adhesive tapes cannot be elastically stretched to appreciable degrees due to the presence of non-extensible materials used in the construction of electronic devices (e.g., non-extensible fabric or foil components)

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Stretchable electrically-conductive adhesive tape
  • Stretchable electrically-conductive adhesive tape
  • Stretchable electrically-conductive adhesive tape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0075] All parts, percentages, ratios, etc. in the examples, as well as in the remainder of the specification, are by weight unless otherwise indicated.

[0076] Test Method for Determination of Change in Resistance of Conductive Tapes by Mechanical Flexure

[0077] A piece (25.4mm x 25.4mm) of conductive tape is applied to a standard FR4 printed circuit across a pair of 25.4mm by 2mm electrodes spaced 25.4mm apart in the middle of a 2" (5.1cm) by 3" (7.6cm) board Plate material (1.6mm thick). During the flex test, one of the 2 inch (5.1 cm) wide ends of the PCB is held in place so that the board is horizontal when a 1 kg load is applied and removed on the opposite end for 400 cycles (resulting in a maximum downward deflection of 4.45mm). A conventional multimeter monitors the resistance across the strip sample during cycling.

Embodiment 1

[0081] This example describes the preparation of a conductive adhesive tape.

[0082] Preparation of double-sided conductive adhesive tape:

[0083] Acrylic copolymer solution (390 parts) commercially available from Geomyung Corp., Cheon-an, Korea under the trade name SEN-7000 (59% solids) was mixed with Geomyung Corp. under the trade name GT75 ( 45% solids), 5.85 parts of isocyanate crosslinker commercially available, 25 parts of nickel powder commercially available under the trade designation T123 from Vale Inco, Canada, and 150 parts of toluene. The components are mixed together using conventional high shear mixing. The resulting mixture was coated onto a 25 micron thick siliconized polyester (PET) release liner using a notched rod, and then heated by passing the coated release liner through an oven, thereby removing the solvent and decomposing the acrylic copolymer. crosslinking. The thickness of the resulting pressure-sensitive adhesive layer was 25 micrometers.

[...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
electrical resistivityaaaaaaaaaa
electrical resistivityaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

A stretchable conductive adhesive tape comprises an electrically-conductive pressure-sensitive adhesive layer having first and second opposed major surfaces. The electrically-conductive pressure-sensitive adhesive layer comprises electrically-conductive particles and an electrically-conductive stretchable fabric disposed within a polymer matrix. The electrically-conductive pressure-sensitive adhesive layer is electrically-conductive in all directions. An elastic backing is disposed on the first major surface of the electrically-conductive pressure-sensitive adhesive layer.

Description

technical field [0001] The present disclosure relates broadly to electrically conductive adhesive articles. Background technique [0002] Conductive adhesive tapes are known in the art and are commonly used to form electrical connections between electrical components, but also for shielding against electromagnetic radiation interference (EMI). Two common types of conductive adhesive tapes are heat activated adhesive tapes (eg, thermoset conductive tapes) and pressure sensitive adhesive (PSA) tapes. [0003] As modern electronic devices (e.g., tablets, cell phones, and portable computers) become thinner, these electronic devices become more prone to flexing during handling and use, which may make conductive materials used in the construction of electronic devices Adhesive tapes exhibit a change in conductivity at the interface between the adhesive and the electrical component to which the adhesive is attached, causing electromagnetic interference (EMI) (eg, in the case of el...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/38C09J9/02
CPCC09J7/20C09J2203/318C09J2301/314C09J2400/26C09J7/21C09J7/22C09J7/385C09J7/40C09J9/02C09J133/00C09J2301/302
Inventor 崔汀完杰弗里·W·麦卡琴
Owner 3M INNOVATIVE PROPERTIES CO