The present invention deals with a process for producing a coated pipe. The process comprises (i) homopolymerising ethylene or copolymerising ethylene and an -olefin comonomer in a first polymerisation step in the presence of a polymerisation catalyst to produce a first ethylene homo- or copolymer having a density of from 940 to 980 kg/m.sup.3 and a melt flow rate MFR.sub.2 of from 1 to 2000 g/10 min; (ii) homopolymerising ethylene or copolymerising ethylene and an -olefin comonomer in a second polymerisation step in the presence of a first ethylene homo- or copolymer to produce a first ethylene polymer mixture comprising the first ethylene homo- or copolymer and a second ethylene homo- or copolymer, said first ethylene polymer mixture having a density of from 940 to 980 kg/m.sup.3 and a melt flow rate MFR.sub.2 of from 10 to 2000 g/10 min; (iii) copolymerising ethylene and an -olefin comonomer in a third polymerisation step in the presence of the first ethylene polymer mixture to produce a second ethylene polymer mixture comprising the first ethylene polymer mixture and a third ethylene copolymer, said second ethylene polymer mixture having a density of from 915 to 965 kg/m.sup.3, preferably from 930 to 955 kg/m.sup.3 and a melt flow rate MFR.sub.5 of from 0.2 to 10 g/10 min; (iv) providing a pipe having an outer surface layer; (v) applying a coating composition onto the pipe outer surface layer to form a top coat layer, wherein the coating composition comprises the second ethylene polymer mixture.

Coated diamond particles have solid diamond cores and at least one graphene layer. Methods of forming coated diamond particles include coating diamond particles with a charged species and coating the diamond particles with a graphene layer. A composition includes a substance and a plurality of coated diamond particles dispersed within the substance. An intermediate structure includes a hard polycrystalline material comprising a first plurality of diamond particles and a second plurality of diamond particles. The first plurality of diamond particles and the second plurality of diamond particles are interspersed. A method of forming a polycrystalline compact includes catalyzing the formation of inter-granular bonds between adjacent particles of a plurality of diamond particles having at least one graphene layer.

A system for buoyant particle processing includes: a reaction vessel, a stirring mechanism, a set of one or more pumps, and a filter. The system can additionally or alternatively include a set of pathways and/or any other suitable component(s). A method for buoyant particle processing includes: stirring the contents of a reaction vessel; washing a set of buoyant particles; and filtering the contents of the reaction vessel. Additionally or alternatively, the method can include any or all of: preprocessing the set of buoyant particles; adding a set of inputs to the reaction vessel; washing the set of buoyant particles; repeating one or more; and/or any other suitable process(es).

An aircraft skin coating assembly for an aircraft. The coating assembly includes a primer layer deposited on the aircraft skin, an optical stop-etch layer deposited on the primer layer that is reflective at a predetermined wavelength, a coating stack-up deposited on the optical etch-stop layer that provides performance features for the aircraft, and a sealant layer deposited on the stack-up. When a laser coating removal process employing a laser beam is used to remove the coating stack-up for replacement, the stop-etch layer reflects the laser beam to prevent it from penetrating and possibly damaging the aircraft skin.

A tire has a coating with a quadlayer or multiple quadlayers, and a method produces the same. In an embodiment, the method for coating a rubber substrate includes exposing the rubber substrate to a first cationic solution to produce a first cationic layer on the rubber substrate. The method also includes exposing the first cationic layer to a first anionic solution to produce a first anionic layer on the first cationic layer. In addition, the method includes exposing the first anionic layer to a second cationic solution to produce a second cationic layer on the first anionic layer. The method further includes exposing the second cationic layer to a second anionic solution to produce a second anionic layer on the second cationic layer. A quadlayer includes the first cationic layer, the first anionic layer, the second cationic layer, and the second anionic layer. The coating includes the quadlayer.

A system for buoyant particle processing includes: a reaction vessel, a stirring mechanism, a set of one or more pumps, and a filter. The system can additionally or alternatively include a set of pathways and/or any other suitable component(s). A method for buoyant particle processing includes: stirring the contents of a reaction vessel; washing a set of buoyant particles; and filtering the contents of the reaction vessel. Additionally or alternatively, the method can include any or all of: preprocessing the set of buoyant particles; adding a set of inputs to the reaction vessel; washing the set of buoyant particles; repeating one or more; and/or any other suitable process(es).

A method of manufacturing a nano antenna is provided. The method includes forming a material layer on a substrate, defining a portion of the material layer, forming an adhesion layer on the defined portion of the material layer, forming a nano antenna material layer on the adhesion layer, and removing the adhesion layer to thereby manufacture the nano antenna.

A rubber substrate has a material diffusion barrier, and a method produces the same. In an embodiment, a method for producing a material diffusion barrier on a rubber substrate include exposing the rubber substrate to a cationic solution to produce a cationic layer on the rubber substrate. The method also includes exposing the cationic layer to an anionic solution 5 to produce an anionic layer on the cationic layer. The anionic layer comprises graphene oxide. The layer includes the cationic layer and the anionic layer. The layer comprises the material diffusion barrier.

There are vapor-deposited films exhibiting various heat shrinkable properties depending on the base film. In a case where a laminate product is fabricated using a vapor-deposited film having a high heat shrinkage rate in the machine direction and subjected to retorting, the barrier properties may deteriorate. Improvement using base films has the disadvantage that a special brand is required to be established since the production quantity at one time is large. The water vapor transmission rate after retorting can be suppressed to 2.5 g/m.sup.2.Math.day or less by providing a laminated body having a shrinkage rate in the MD direction before and after retorting of 1.2% or less in the transverse direction and a difference between the maximum MD shrinkage rate and the minimum MD shrinkage rate in the transverse direction of 0.4% or less.

The present invention discloses a plasma non-stick pan and manufacturing method thereof. The plasma non-stick pan comprises a pan body and a non-stick layer applied to the pan body; a plasma layer is provided between the non-stick layer and the pan body, and the plasma layer comprises a MCrALY layer sprayed to the surface of the pan body and a mixture layer sprayed outside of the MCrALY layer, and the mixture layer is composed of MCrALY particles and metal oxide particles. The MCrALY layer has good toughness and strong adhesion, and it is easy to bind with the substrate with high fastness after binding, playing a buffering role and laying a foundation for the subsequent spraying of mixture layer.