48results about How to "Excellent pinhole resistance" patented technology

A vacuum heat insulation material has a covering material which is a lamination body including a sealant layer, a metal foil layer, a first plastic film layer, and a second plastic film layer which are laminated in this order from inside to outside via adhesive layers. When a foreign body is pierced into the vacuum heat insulation material, the propagation of breakage caused by the piercing is blocked somewhere inside the lamination body, thereby preventing the formation of through-pinholes. This results in the provision of a high-quality vacuum heat insulation material with excellent long-term insulation performance by using a covering material excellent in gas barrier properties and pinhole resistance to the piercing of minute foreign bodies.

The present invention relates to an ethylene-alpha-olefin copolymer; a composition thereof; a film thereof; a polar group-containing resin material; and productions and use of the ethylene-alpha-olefin copolymer. The ethylene-alpha-olefin copolymer of the present invention is characterized in satisfying the following conditions (A) to (E): (A) a density in the range of 0.92 to 0.96 g / cm3; (B) a melt flow rate (MFR) in the range of 0.01 to 200 g / 10 min; (C) a molecular weight distribution (Mw / Mn) in the range of 1.5 to 5.0; (D) possessing only one peak in terms of the number of peaks observed in an elution temperature-eluted amount curve as measured by the continuous temperature raising elution fractionation (TREF) method, from the integrated elution curve obtained by the elution temperature-eluted amount curve, the difference T75-T25 in the temperature and density d respectively satisfy a specific relationship, wherein T25 is the temperature where 25% of the total elution is obtained, and T75 is the temperature where 75% of the total elution is obtained; and (E) possessing one or two melting point peaks, and among these the highest melting point Tm1 and the density d satisfy a specific relationship. Accordingly, this ethylene-alpha-olefin copolymer exhibits a superior thermal resistance, heat sealability, and processability.

The present invention relates to a polyamide-based multilayer film containing at least one saponified ethylene-vinyl acetate copolymer later and at least one polyamide layer; and provides a polyamide-based multilayer film having excellent resistance to boiling water and retort treatment, and a production method therefor.

A layered product for soft packaging comprises at least a paper base layer, an adhesive layer, a barrier layer, and a sealant layer, stacked together in this stated order, wherein the adhesive layer contains an ionomer (A) of an ethylene-unsaturated carboxylic acid copolymer, and the contained amount of metal ions represented by X * Y / 100 is 4.0-20.0, where X [mass%] represents the contained amount of an unsaturated carboxylic acid in the ethylene-unsaturated carboxylic acid copolymer (A1) included in the ionomer (A) of the ethylene-unsaturated carboxylic acid copolymer, and Y [mol%] represents the degree of neutralization of the ionomer (A) of the ethylene-unsaturated carboxylic acid copolymer.

This invention provides a process for efficiently producing a biaxially oriented polyamide resin laminated film roll that can realize bag making by lamination with high efficiency at high yield even under high humidity conditions. The production process of a film roll comprises a melt extrusion-cooling step of melt extruding a polyamide resin onto the surface of a movable cooling material into a sheet form and cooling the extrudate to form an unstretched sheet, a biaxially stretching step of biaxially stretching the unstretched sheet in longitudinal and transverse directions, and a winding step of winding the biaxially stretched film into a roll form. In the melt extrusion-cooling step, in melt extrusion-cooling of the polyamide resin on the movable cooling material surface, corona discharge in a streamer corona state is carried out between an electrode, to which a direct current high voltage has been applied, and the polyamide resin laminated sheet in a melted state to impart, to thepolyamide resin laminated sheet in a melted state, charges sufficient for adhesion to the movable cooling material surface.

Provided is a flexographic printing original plate obtained by sequentially laminating at least a support, a photosensitive resin composition layer, an intermediate layer and an infrared ablation layer, wherein the intermediate layer includes a hydrophilic resin (A) and an inorganic layered compound (B), and the thickness of the intermediate layer is 2-30 [mu]m.