Equipment of making a substrate of plastic flooring contains: an extrusion unit, a thickness regulating unit, and a rolling apparatus. The extrusion unit includes an outlet, and the thickness regulating unit including an inlet, a channel, and a cooler. The rolling apparatus includes a first roller, a second roller, and a press roller. The press roller at least includes a contacting roller and a pressing roller, wherein the contacting roller is configured to roll a foaming sheet, a printing layer, and an abrasion resistant layer. Furthermore, a heating unit heats the foaming sheet, the printing layer, and the abrasion resistant layer so that the foaming sheet, the printing layer, and the abrasion resistant layer are connected by using the pressing roller.

A method of making plastic flooring contains steps of: A. providing the substrate and delivering the substrate toward a rolling unit; B. delivering a printing layer, wherein the printing layer is blank and is delivered toward the rolling unit by way of a second delivery roller mechanism; C. rolling, wherein the rolling unit rolls the substrate and the printing layer, and the printing layer has three-dimensional embossing; D. digital printing, wherein color material being printed on three-dimensional embossing by using the digital print unit; E. coating an abrasion resistant layer, wherein a coating unit coats wear-resistant materials of the abrasion resistant layer on the printing layer; and F. shaping, wherein the plastic flooring material is shaped so as to dry and harden the abrasion resistant layer.

A method of making plastic flooring contains steps of: A. providing the substrate and delivering the substrate toward a rolling unit; B. delivering a printing layer, wherein the printing layer is blank and is delivered toward the rolling unit by way of a second delivery roller mechanism; C. rolling, wherein the rolling unit rolls the substrate and the printing layer, and the printing layer has three-dimensional embossing; D. digital printing, wherein color material being printed on three-dimensional embossing by using the digital print unit; E. coating an abrasion resistant layer, wherein a coating unit coats wear-resistant materials of the abrasion resistant layer on the printing layer; and F. shaping, wherein the plastic flooring material is shaped so as to dry and harden the abrasion resistant layer.

There is provided a polyolefin resin foam sheet formed by foaming a polyolefin resin, wherein the expansion ratio of the foam sheet is 1.5 to 20 cm.sup.3/g, the average cell sizes in the MD direction and the TD direction of the foam sheet are 130 m or less, and the following formulas (1) and (2) are satisfied:

T.sub.M/D6(1); and

T.sub.T/D5(2), where T.sub.M denotes the tensile strength at 90 C. in the MD direction, T.sub.T denotes the tensile strength at 90 C. in the TD direction, and D denotes the density (g/cm.sup.3) of the foam sheet.

Described herein are methods and processes of manufacturing irradiation crosslinked polypropylene foam. In some embodiments, this includes extrusion of all material components, including a liquid crosslinking agent, to manufacture extruded structures for production of irradiation crosslinked polypropylene foam.

Described herein are methods and processes of manufacturing irradiation crosslinked polypropylene foam. In some embodiments, this includes extrusion of all material components, including a liquid crosslinking agent, to manufacture extruded structures for production of irradiation crosslinked polypropylene foam.

Provided are a molded article formed of a thermoplastic resin composition, wherein a maximum height (Rmax) of surface roughness of the molded article measured in accordance with JIS B 0601-1982 and a centerline average roughness (Ra) of a surface of the molded article measured in accordance with JIS B 0601-1982 satisfy a formula: 9Rmax/(Ra+1)45, an area ratio of through-holes of the molded article is 1% or more and 20% or less, with a surface area of the molded article being 100%, and a bulk density of the molded article is 0.13 g/cm.sup.3 or more and 0.50 g/cm.sup.3 or less; a method for producing the molded article; and a laminate having the molded article.

Provided are a molded article formed of a thermoplastic resin composition, wherein a maximum height (Rmax) of surface roughness of the molded article measured in accordance with JIS B 0601-1982 and a centerline average roughness (Ra) of a surface of the molded article measured in accordance with JIS B 0601-1982 satisfy a formula: 9Rmax/(Ra+1)45, an area ratio of through-holes of the molded article is 1% or more and 20% or less, with a surface area of the molded article being 100%, and a bulk density of the molded article is 0.13 g/cm.sup.3 or more and 0.50 g/cm.sup.3 or less; a method for producing the molded article; and a laminate having the molded article.

The present invention relates to a method for producing a biodegradable resin expanded sheet, by which a biodegradable resin expanded sheet immediately after extrusion is brought into a predetermined cooled state in an extrusion expansion method, whereby good formability can be exerted.

The present invention relates to a method for producing a biodegradable resin expanded sheet, by which a biodegradable resin expanded sheet immediately after extrusion is brought into a predetermined cooled state in an extrusion expansion method, whereby good formability can be exerted.