Abstract:
An adhesive bonding laminate includes a first thermoplastic adhesive film that is capable of adhesively bonding to an epoxy coating and a second thermoset adhesive film that is capable of adhesively bonding to a passivated surface of a substrate. The first thermoplastic adhesive film is adhesively bonded to the second thermoset adhesive film. Ink jet printheads, ink jet print cartridges and methods of attaching a flexible circuit to substrate employ the adhesive bonding laminate.
Abstract:
A multilayer PSA construction includes a facestock, a hazy, first adhesive layer adjacent the facestock, and a PSA layer adjacent the first adhesive layer, and is protected until use by a release liner. The first adhesive layer includes an immiscible blend of a first elastomer having a first glass transition temperature and forming a continuous phase, and a second elastomer forming a discontinuous phase. The second elastomer has a glass transition temperature greater than the first glass transition temperature. The first adhesive layer also contains a tackifying component, which is preferentially soluble in the discontinuous phase. The PSA layer has a composition different from the first adhesive layer and is formed of at least one tackified elastomer that provides a measurable third maximum glass transition temperature, which is less than the second glass transition temperature. The multilayer PSA construction exhibits reduced migration of tackifiers and plasticizers over time.
Abstract:
An adhesive tape for electronic parts which comprises a metal substrate and an adhesive layer A and an adhesive layer B laminated in order on at least one side of said metal substrate, wherein said adhesive A comprises a polyimide consisting of 100 -20% by mol of the repeating unit represented by the following formula (1a) and 0-80% by mol of the repeating unit represented by the following formula (1b), said adhesive B comprises a polyimide consisting of 100-40% by mol of the repeating unit represented by the following formula (1a) and 0-60% by mol of the repeating unit represented by the following formula (2), and the adhesive layer A and the adhesive layer B have each a different glass transition temperature: ##STR1## wherein Ar represents a divalent group selected from the specified structures containing aromatic rings, R is an alkylene group having 1 to 10 carbon atoms or --CH.sub.2 OC.sub.6 H.sub.4 --, the methylene group of which attaches to Si, and n means an integer of 1 to 20.
Abstract:
The present invention is directed toward a multilayer, pressure-sensitive adhesive construction wherein one layer is formed of a first adhesive composition having a first glass transition temperature, and at least a second layer is formed of a second adhesive composition having a second glass transition temperature. The first glass transition temperature differs from the second glass transition temperature by from about 10.degree. C. to about 50.degree. C.
Abstract:
An adhesive sheet comprising a substrate having formed on one surface or both surfaces thereof a rubber-like elastic layer, a heat-expandable layer, and an adhesive layer in the order from the substrate side.
Abstract:
A pressure-sensitive adhesive tape comprising a plurality of superimposed layers, at least one outer layer being a pressure-sensitive adhesive layer, contiguous layers defining an interface therebetween, each of the layers comprising a photopolymerized matrix of polymeric chains; the polymeric chains extending from the matrix of one of the layers through the interface into the matrix of a contiguous layer; the polymeric chains comprising polymerized monomers having migrated from the matrix of each contiguous layer prior to polymerization, whereby the layers cannot be delaminated.
Abstract:
Adjoining strata of pressure-sensitive adhesive are transferred to a package substrate. The two outermost adhesive strata have different adhesion to the substrate. The adhesive strata are used as a reclosable fastener and are intermixed in the course of reclosing and reopening the package, the action being such as to advantageously compensate for contamination occurring at the reseal interface while maintaining the status quo at the permanent interface.
Abstract:
A pressure-sensitive adhesive tape which not only conforms well and adheres quickly to irregular substrates but also possesses excellent shear adhesion performance. These properties, normally mutually exclusive, are achieved through use of superposed plural pressure-sensitive adhesive strata, the outer stratum being significantly softer than the one lying immediately beneath it.
Abstract:
A heat-curable multilayer composite sheet comprising a layer comprising one or more unsaturated compounds which are normally solid or liquid free radical reactive unsaturated compounds and a layer comprising a normally solid or liquid free radical initiator, the layers being bonded to each other as a laminate as separate layers at a temperature at which the free radical initiator does not lose its free radical reaction-initiating capability, and,a process for preparing a heat-curable multilayer composite sheet, which comprises coating a layer-forming material containing a normally solid or liquid free radical reactive unsaturated compound on a strippable sheet to form an unsaturated compound material layer on the strippable sheet, coating a layer-forming material containing a normally solid or liquid free radical initiator on a strippable sheet to form a free initiator layer on the strippable sheet, bringing the unsaturated compound material layer into contact with the free radical initiator layer, and bonding them to each other at a temperature at which the free radical initiator layer does not lose its free radical reaction initiating ability.
Abstract:
An adhesive film and an organic electronic device including the same are provided. The adhesive film includes: a first bonding layer including a first bonding component layer, a moisture absorbent, and first core shell particles; and a second bonding layer disposed below the first bonding layer and including second core shell particles, which are formed of a different material from the first core shell particles, wherein each of the first core shell particles includes a first shell and a first core surrounded by the first shell and each of the second core shell particles includes a second shell and a second core surrounded by the second shell.