It is provided a backing layer material resistant to temperature of up to about 600? C. comprising stainless steel powder, cement, water, and optionally at least one adjuvant, a ultrasonic transducer comprising said backing layer material conferring stability to the a ultrasonic transducer to temperature of up to about 600? C.

The invention relates to a process for manufacturing a multilayered porous transport layer, the process comprising (a) providing a first feedstock comprising first metal particles and a first polymer binder; and providing a second feedstock comprising second metal particles and a second polymer binder; the first and the second feedstock having a metal powder content of 40 to 70% by volume; and the first feedstock having (i) metal particles with a smaller average particles size, (ii) a higher metal powder content, or (iii) both, metal particles with a smaller average particles size and a higher metal powder content compared to the second feedstock; (b) coextruding the first and the second feedstock to form a film-shaped green body comprising a first layer and a second layer, the second layer being materially connected to the first layer above the melting temperature and or glass transition temperature of the first polymer binder and the second polymer binder; (c) optionally smoothening the film-shaped green body by rolling or calendering; (d) debinding the film-shaped green body to form a brown body; (e) sintering the brown body under a non-oxidative atmosphere or vacuum and a temperature of from 700 to 1300 C. to form the porous transport layer; wherein the first feedstock and the second feedstock are free of any solvents.

In a method for producing a multilayered magnet with a plurality of first layers and a plurality of second insulating layers which follow one another alternately, material having magnetic material and a binder is applied by injection molding to a base plate to form a first layer of a green body at a thickness of at least 1.5 mm and at most 4 mm. Further material is applied by injection molding to form a second insulating layer of the green body adjacent to the first layer at a thickness of at least 0.01 mm and at most 0.1 mm, with the further material being an electrically poorly conducting material with an electrical conductivity which is between 1.Math.10.sup.8 and 1.Math.10.sup.14 S/m; and/or the second insulating layer is formed by oxidizing a surface of the first layer through application of an oxidizing agent; and/or by applying the binder by injection molding.

An ultra-fast marine-biodegradable composite film can include at least one water-soluble layer, and at least one marine-biodegradable layer disposed in contact with the at least one water-soluble layer. The composite film can include a plurality of the water-soluble layer, and a plurality of the marine-biodegradable layer interspaced between the marine-biodegradable layers. The composite film may be used for packaging, including food packaging. Methods of preparing an ultra-fast marine-biodegradable composite film are also disclosed.

A packaging film that is easy to heat-seal and has excellent anti-blocking performance. The packaging film has one surface formed of an iron powder-blended propylene-based resin layer, in which the one surface is a rough surface derived from the iron powder, and the rough surface has a surface roughness Sa (ISO25178) in a range from 1.0 to 10 m.

An olefin-based resin packaging material containing a large amount of an olefin-based resin, suitable in recyclability of the olefin-based resin, and having excellent characteristics not found in the olefin-based resin. The olefin-based resin packaging material contains, per 100 parts by mass of the packaging material, an olefin-based resin in an amount of 80 parts by mass or more; a resin other than the olefin-based resin in an amount suppressed to less than 16.9 parts by mass; and an iron powder in an amount of less than 5 parts by mass.

There are provided an electromagnetic wave shielding material including a multilayer structure having, between two metal layers, a high magnetic permeability layer that is an insulating layer in which a real part of a complex specific magnetic permeability at a frequency of 100 kHz is 30 or more, and an electronic component and an electronic apparatus which include the electromagnetic wave shielding material.