A method of manufacturing a hollow core door is disclosed, as wall as a corresponding hollow core door. The method includes the steps of providing a solid flat door skin, moisturizing the flat skin, applying a conditioning resin thereto, pre-heating the flat door skin, and thereafter pressing the flat door skin between a pair of heated platens in a press in order to reform the flat skin into a molded skin including a plurality of panels defined therein. The press continuously closes in order to reform the flat skin into the molded skin, with the rate of press closure being a function of the determined hardness of the flat skin to be reformed. The resulting door skins have an improved bond strength, and are efficiently manufactured.

A method of manufacturing bulked continuous carpet filament which, in various embodiments, comprises: (A) grinding recycled PET bottles into a group of flakes; (B) washing the flakes; (C) identifying and removing impurities, including impure flakes, from the group of flakes; (D) passing the group of flakes through an MRS extruder while maintaining the pressure within the MRS portion of the MRS extruder below about 1.5 millibars; (E) passing the resulting polymer melt through at least one filter having a micron rating of less than about 50 microns; and (F) forming the recycled polymer into bulked continuous carpet filament that consists essentially of recycled PET.

A preparation method of a colchicine (COL) hydrogel microneedle (MN) is provided, including the following steps: dissolving an acrylamide (AM), N,N-bis(acryloyl)cysteamine (BACA), and Irgacure 2959 in ultrapure water to obtain a clear gel solution; pouring the clear gel solution into a polydimethylsiloxane (PDMS) mold, conducting low-speed centrifugation, and conducting an ultrasonic treatment to eliminate air bubbles; irradiating the PDMS mold under ultraviolet light, and air-drying in an oven to obtain a hydrogel MN; and adding a COL solution to the hydrogel MN, allowing swelling, air-drying, and demolding. The present disclosure overcomes the shortcoming that cross-linking points are unevenly distributed in the ordinary hydrogel MNs. The hydrogel MN prepared by the present disclosure has a complete needle shape, a neat matrix arrangement, cross-linking points evenly distributed in a network, and excellent mechanical toughness and a superior swelling capacity.

A preparation method of a colchicine (COL) hydrogel microneedle (MN) is provided, including the following steps: dissolving an acrylamide (AM), N,N-bis(acryloyl) cysteamine (BACA), and Irgacure 2959 in ultrapure water to obtain a clear gel solution; pouring the clear gel solution into a polydimethylsiloxane (PDMS) mold, conducting low-speed centrifugation, and conducting an ultrasonic treatment to eliminate air bubbles; irradiating the PDMS mold under ultraviolet light, and air-drying in an oven to obtain a hydrogel MN; and adding a COL solution to the hydrogel MN, allowing swelling, air-drying, and demolding. The present disclosure overcomes the shortcoming that cross-linking points are unevenly distributed in the ordinary hydrogel MNs. The hydrogel MN prepared by the present disclosure has a complete needle shape, a neat matrix arrangement, cross-linking points evenly distributed in a network, and excellent mechanical toughness and a superior swelling capacity.

This invention relates to a polymeric pipe obtained by a peroxide crosslinking process. The pipe is formed from a composition comprising a polyolefin structural polymer, a peroxide initiator in an amount of from about 0.2% to about 5% by weight, and a co-agent in an amount of from about 0.02% to about 5% by weight. The co-agent comprises at least two reactive carbon-carbon double bonds. The invention also relates to methods of forming said pipes. The invention also relates to the use of a co-agent in a composition to reduce bubble formation in a peroxide crosslinking process. The invention also relates to the use of such polymeric pipes for the transport of water.

Systems for manufacturing bulked continuous carpet filament from polymer, where the systems are configured for: (1) passing polymer flakes through a crystalliers; (2) melting the polymer to create a first single stream of polymer melt; (3) separating the first single stream of polymer melt into multiple streams of polymer melt; (4) exposing the multiple streams of polymer melt to a pressure of between about 0 millibars and about 25 millibars in a chamber; (5) recombining the multiple streams of polymer melt into a second single stream of polymer melt; and (6) providing the second single stream of polymer melt to one or more spinning machines that are configured to form the second single stream of polymer melt into bulked continuous carpet filament.

Disclosed are processes and systems for degassing liquid resin. Resin is provided at a resin inlet and pumped into a first duct using a resin pump to achieve a first absolute pressure of at least 1.6 bar in the first duct; the resin pump and/or a flow control valve are configured to achieve a first pressure drop across the flow control valve of at least 1.5 bar; a second duct communicates the resin from the flow control valve to a storage tank; a gas evacuation system maintains a pressure in the storage tank below 100 mbar at least partly concurrently with pumping resin into the first duct.

The invention relates to a supply apparatus (100) for supplying at least one molding device (500) with a polymerizable mixture, comprising: a tank (110) where is stored the polymerizable mixture, a line (120) for supplying the at least one molding device with said polymerizable mixture, the line being connected to an outlet of the tank for receiving the polymerizable mixture and to an inlet of said at least one molding device, and means for making the polymerizable mixture circulate in said line. According to the invention, the line includes remove means (190) for removing the gas from said polymerizable mixture and for evacuating said gas out of said supply apparatus.

The invention relates to a method for supplying a polymerizable mixture to at least one molding device, said method comprising the following steps: a) providing a tank containing the polymerizable mixture (box E1), b) reaching a set value of pressure (Ps) in the tank, smaller than the ambient pressure (box E2), c) continuously maintaining the pressure (P) in the tank at the set value of pressure while supplying the polymerizable mixture to the molding device (boxes E3, E4, E41, E42, E5, E51). The invention also relates to a supply device for supplying the molding device with polymerizable mixture.