Hans E Lunk

44867212, Dec 4, 1984

Dec 7, 1981

6/328346

Rajendra S. Cornelius - Palo Alto CA
Hans E. Lunk - Menlo Park CA
Albert R. Martin - Oakland CA
Mark D. Mendenhall - Fremont CA

Raychem Corporation - Menlo Park CA

H01P 300

333 1

Disclosed is a high frequency attenuation core and cable. The core includes a conductor surrounded by a high frequency energy absorbing medium, then surrounded by a dielectric, and then surrounded by an outer layer made from a material having a high complex dielectric constant. The cable includes the above described core surrounded by an electromagnetic interference (EMI) shield which is further surrounded by a conductive layer. The cable and core as described above may be used in harness applications wherein a plurality of cores and/or cables as described above are surrounded by a gross shield. In addition, when the cores described above are used in multi-core applications, they may individually include an additional EMI shield for greater electromagnetic interference protection.

45214859, Jun 4, 1985

Sep 27, 1983

6/536919

Stephen L. Tondre - Menlo Park CA
Hans E. Lunk - Fremont CA

Raychem Corporation - Menlo Park CA

B32B 1500
H01B 700

428383

Electrical insulation comprises (1) an inner layer of a cross-linked polymer, e. g. polyethylene, an ethylene/tetrafluoroethylene copolymer, an ethylene/chlorotrifluoroethylene polymer or a vinylidene fluoride polymer, and (2) an outer layer of an aromatic polymer having a glass transition temperature of at least 100. degree. C. , e. g. a polyether ether ketone, a polyether ketone or a polyether sulfone. Such insulation combines excellent properties under normal service conditions with low smoke evolution on burning, and is therefore particularly useful for aircraft wire and cable.

53275136, Jul 5, 1994

May 28, 1992

7/890045

Phu D. Nguyen - San Jose CA
Ashok K. Mehan - Union City CA
Hans E. Lunk - Menlo Park CA
James M. O'Brien - Fremont CA

Raychem Corporation - Menlo Park CA

G02B 644

385114

This invention relates to flat cables comprising a plurality of substantially parallel insulated conductors bonded to a polymeric substrate which has a melting point greater than 200. degree. C. and/or a thickness less than 2. 5 mils (98 microns) and a method for the production of such cables.

50594834, Oct 22, 1991

Apr 17, 1989

7/338914

Hans E. Lunk - Menlo Park CA
Neal Enault - Sunnyvale CA
Ashok Mehan - Union City CA

Raychem Corporation - Menlo Park CA

B32B 1500
B32B 2700
H01B 700

428383

Shaped articles of cross-linked polymers comprising a first component having little or no cross-linking and high elongation, and a second component having a relatively high level of cross-linking and low elongation. Such articles are particularly useful in the form of electrical insulation, the first component being adjacent to a wire or other conductor. Preferably each of the components comprises a crystalline fluorocarbon polymer, especially an ethylene/tetrafluoroethylene copolymer. Such articles can be prepared by (1) melt-extruding a first polymeric composition which contains little or no cross-linking agent, and a second polymeric composition which contains a greater amount of cross-linking agent, (2) maintaining the two extrudates under conditions such that cross-linking agent migrates from the second to the first composition, and (3) cross-linking both compositions, preferably by radiation.

52487130, Sep 28, 1993

Jun 13, 1990

7/537558

Hans E. Lunk - Menlo Park CA
Timothy S. Smith - Nr. Trowbridge, GB2
Stephen L. Tondre - Fremont CA
Alan S. Yeung - Redwood City CA

Raychem Corporation - Menlo Park CA

C08K 549

524120

Compositions containing at least about 30% of a poly(alkylene terephthalate), at least about 3% of a polylactone, about 0. 05% to about 10% of a carbodiimide and at least about 0. 05% to about 10% of an aliphatic phosphite, all percentages being by weight based on the weight of the composition, has excellent thermal stability. The compositions are useful for wire insulation and cable jacketing. Heat recoverable articles, such as tubing and molded parts can be prepared from the compositions.

48761168, Oct 24, 1989

Sep 11, 1986

6/906355

Ashok K. Mehan - Union City CA
Hans E. Lunk - Menlo Park CA

Raychem Corporation - Menlo Park CA

B05D 512

427118

When metal conductors are stored, especially in humid environments, their solderability decreases. The rate at which solderability decreases can be reduced by treating the conductor with a suitable surface active agent, particularly one which has an HLB (hydrophile-lipophile balance) number of less than 10, preferably less than 5. The surface active agent can be applied to the conductor with a suitable liquid carrier, e. g. as a solution in a mineral oil or a halogenated hydrocarbon. If desired, a polymeric insulating jacket can be melt-extruded or wrapped over the treated conductor.

52685314, Dec 7, 1993

Mar 6, 1992

7/847558

Phu D. Nguyen - San Jose CA
Ashok K. Mehan - Union City CA
Hans E. Lunk - Menlo Park CA
James M. O'Brien - Fremont CA

Raychem Corporation - Menlo Park CA

H01B 708

174 36

This invention relates to flat cables comprising a plurality of insulated conductors bonded to a metallic substrate. The metallic substrate is provided with a layer of polymeric material capable of bonding to the insulation of the conductors. The layer of polymeric material is bonded to the metallic substrate with a peel strength of at least about 1 pound per linear inch (pli). The insulated conductors are bonded to the layer of polymeric material. The bond strength between the insulated conductors and the layer of polymeric material and the bond strength between the layer of polymeric material and the metallic substrate are such that the individual insulated conductors can be cleanly peeled away from the substrate.

46249907, Nov 25, 1986

Apr 4, 1985

6/720119

Hans E. Lunk - Menlo Park CA
Donald A. Reed - Menlo Park CA

Raychem Corporation - Menlo Park CA

C08L 2712

525199

Melt-shapeable polymeric compositions comprising a first fluoropolymer of relatively low crystallinity, e. g. a copolymer of tetrafluoroethylene and a perfluorinated comonomer, and a second fluoropolymer of relatively high crystallinity, especially a fluoropolymer obtained by irradiating PTFE or another fluoropolymer which cannot be melt-shaped in the absence of other polymers. The weight ratio of the first to the second polymer is preferably 0. 3:1 to 2. 5:1. The compositions have a wide variety of uses, for example as insulating materials or, if they contain carbon black or another conductive filler, as PTC conductive polymers.