An internal mixing extruder includes an internal mixing mechanism including a mixing chamber, where the mixing chamber includes a rear end provided with a first feed port, and a front end provided with a first discharge port, and a rotor is provided in the mixing chamber along a front-rear direction; an extrusion mechanism located below the internal mixing mechanism, where the extrusion mechanism includes an extruding chamber, the extruding chamber includes a rear end provided with a second feed port, and a front end provided with a mold, and a screw is provided in the extruding chamber along the front-rear direction; and a hopper, where the hopper is connected between the first discharge port and the second feed port. Materials are plasticized fully in the internal mixing mechanism. The fully plasticized materials enter the hopper. The hopper conveys to-be-extruded materials to the extrusion mechanism in a forced feeding manner.

An internal mixing extruder includes an internal mixing mechanism including a mixing chamber, where the mixing chamber includes a rear end provided with a first feed port, and a front end provided with a first discharge port, and a rotor is provided in the mixing chamber along a front-rear direction; an extrusion mechanism located below the internal mixing mechanism, where the extrusion mechanism includes an extruding chamber, the extruding chamber includes a rear end provided with a second feed port, and a front end provided with a mold, and a screw is provided in the extruding chamber along the front-rear direction; and a hopper, where the hopper is connected between the first discharge port and the second feed port. Materials are plasticized fully in the internal mixing mechanism. The fully plasticized materials enter the hopper. The hopper conveys to-be-extruded materials to the extrusion mechanism in a forced feeding manner.

The present application relates to a supercritical fluid injection foaming polylactide foam material and a preparation method therefor. The method includes: first obtaining a surface-modified cellulose nanofiber aqueous solution; then melting and blending the cellulose nanofiber aqueous solution and a polylactide twice; passing same through extrusion, cooling under water, and granulation so as to obtain a polylactide/cellulose nanofiber composite material; then plasticizing and melting the polylactide/cellulose nanofiber composite material in a microporous foaming injection molding machine; uniformly mixing same with a supercritical fluid foaming agent in the injection molding machine; injecting same into a mold cavity; and subjecting the resultant to post-treatment so as to obtain a polylactide foam material. The polylactide foam material has a sandwich structure, in which two outer surface layers are solid layers that do not contain any foam, and the sandwiched layer is a foam layer having a cellular structure.

The present application relates to a supercritical fluid injection foaming polylactide foam material and a preparation method therefor. The method includes: first obtaining a surface-modified cellulose nanofiber aqueous solution; then melting and blending the cellulose nanofiber aqueous solution and a polylactide twice; passing same through extrusion, cooling under water, and granulation so as to obtain a polylactide/cellulose nanofiber composite material; then plasticizing and melting the polylactide/cellulose nanofiber composite material in a microporous foaming injection molding machine; uniformly mixing same with a supercritical fluid foaming agent in the injection molding machine; injecting same into a mold cavity; and subjecting the resultant to post-treatment so as to obtain a polylactide foam material. The polylactide foam material has a sandwich structure, in which two outer surface layers are solid layers that do not contain any foam, and the sandwiched layer is a foam layer having a cellular structure.

A polyethylene blend composition suitable for film applications comprising from 10 to 100 percent by weight of an ethylene-based polymer made by the process of: selecting an ethylene/-olefin interpolymer (LLDPE) having a Comonomer Distribution Constant (CDC) in the range of from 75 to 300, a vinyl unsaturation of less than 150 vinyls per one million carbon atoms of the ethylene/-olefin interpolymer; a zero shear viscosity ratio (ZSVR) in the range from 4 to 50; a density in the range of from 0.925 to 0.950 g/cm.sup.3, a melt index (I.sub.2) in a range of from 0.1 to 2.5 g/10 minutes, a molecular weight distribution (M.sub.w/M.sub.n) in the range of from 1.8 to 4.0; reacting said ethylene/-olefin interpolymer with an alkoxy amine derivative in an amount equal to or less than 900 parts derivative per million parts by weight of total ethylene/-olefin interpolymer under conditions sufficient to increase the melt strength of the ethylene/-olefin interpolymer is provided.

A polyethylene blend composition suitable for film applications comprising from 10 to 100 percent by weight of an ethylene-based polymer made by the process of: selecting an ethylene/-olefin interpolymer (LLDPE) having a Comonomer Distribution Constant (CDC) in the range of from 75 to 300, a vinyl unsaturation of less than 150 vinyls per one million carbon atoms of the ethylene/-olefin interpolymer; a zero shear viscosity ratio (ZSVR) in the range from 4 to 50; a density in the range of from 0.925 to 0.950 g/cm.sup.3, a melt index (I.sub.2) in a range of from 0.1 to 2.5 g/10 minutes, a molecular weight distribution (M.sub.w/M.sub.n) in the range of from 1.8 to 4.0; reacting said ethylene/-olefin interpolymer with an alkoxy amine derivative in an amount equal to or less than 900 parts derivative per million parts by weight of total ethylene/-olefin interpolymer under conditions sufficient to increase the melt strength of the ethylene/-olefin interpolymer is provided.

A mixing and extrusion machine for tire sealant materials of the type comprising: a dump extruder equipped with conical converging twin screws located in a batching chamber, said chamber having a low pressure feeding area and a high pressure ducted area; a removable blind flange for temporarily sealing the outlet of said batching chamber so that said material is forced to recirculate between said duct area and said feeding area within said batching chamber, said chamber thereby also acting as a compounding chamber; and an inlet port located in the high pressure ducted area, the inlet port capable of introducing a diluent during mixing of a tire sealant material.

A polyamide composite resin composition for a fuel filler pipe includes 41 to 77% by weight of polyamide 6, 5 to 15% by weight of m-xylenediamine (MXD)-based modified nylon, 14 to 30% by weight of a maleic anhydride-grafted ethylene-octene copolymer, a maleic anhydride-grafted ethylene-propylene-diene monomer, or a mixture thereof, and 3 to 10% by weight of mixed clay.

A polyvinyl chloride (PVC) flooring production line includes a loading system, an internal-mixing extrusion device, a calendering lamination device, a cooling device, a tractor, and a cutter that are arranged sequentially along a material conveying direction, where the internal-mixing extrusion device includes an internal mixing mechanism, an extrusion mechanism, and a hopper. In an internal mixing stage of the internal-mixing extrusion device, materials are quickly dispersed and plasticized, and plasticized materials directly enter an extruding stage through the hopper for extrusion molding.

In order to provide a twin-screw extruder that can also be effectively used for a use, such as straining, since suppressing an increase in load power and the generation of heat of a material in a hopper unit and increasing pressure for extruding a material from a material outlet in a compression unit, the size of the lead angle of a screw blade at the position of the compression unit is set to be larger than the size of the lead angle of the screw blade at the position of the hopper unit 11 and the screw blade is disposed at the position of the compression unit so as to be wound two or more times.