An opening device for a package made of a sheet packaging materialsaid sheet packaging material comprising at least a first layer and a second layer, and having a hole formed through said first layer and sealed by a cover portion of said second layeris made of plastic material molded onto said cover portion, and in turn comprises a spout defining a pouring opening and a wall portion closing said pouring opening, said wall portion defining, together with said cover portion, a user-removable sealing portion of said spout, a weakening region being interposed between said wall portion and said spout and said cover portion covering said weakening region; a molding apparatus for molding an opening device on a sheet packaging material is also disclosed.

A disclosed process includes steps of heating a foamed material by irradiation with near infrared radiation having a wavelength between 0.78 and 1.40 m to form a heated material, forming the heated material with a forming tool to obtain a formed material, and cooling the formed material and demolding to obtain a final workpiece. The foamed material may be constructed as a composite ply construction including an outer material and a foamed core between the outer material. The foamed material may contain a poly(meth)acrylimde, a polypropylene or a highly-crosslinked polyurethane.

A method of making a laminated trim component at a molding station is provided. A heated plastic composite sheet is pressed against a heated laminated sheet to bond a plastic cushioning layer of the laminated sheet to the plastic composite sheet at the molding station. The step of pressing compresses a portion of the laminated sheet spaced inwardly from an outer periphery of the laminated sheet to locally compact and thin the cushioning layer at the portion to form a compressed portion of the cushioning layer. A plastic compatible with the plastic of the composite sheet is molded around the composite sheet to form at least one component at the inner surface of the composite sheet at the molding station.

A thin-walled polypropylene product display tube. The thin-walled polypropylene product display tube includes a tubular member having a closed end, an open end, an inner diameter and, between the closed end and the open end, a first outer diameter, the open end terminating in a flared portion having a second outer diameter, the tubular member having a wall thickness sufficient to yield a level of haze equal to or less than 8%. A process for forming a thin-walled polypropylene product display tube is also provided.

The present invention covers a non-woven fabric for laminate on a polyethylene layer, such that a. it is comprised by a mixture of polypropylene hydrophobic and hydrophilic fibers; b. it is manufactured by means of a carding process followed by thermal bonding c. during the thermal bonding is engraved in at least 15% of its area d. has a minimum base weight of 13 gr/m.sup.2.

A thermal welder is configured to weld a back seam of a bag formed of thermoplastic sheet material. The welder may include a weld heater and a compression mechanism downstream of the weld heater to compress the sheet material to form the back seam. The welder may also include a weld breaker downstream of the compression mechanism to break apart incidental welds which are formed adjacent the back seam.

The invention is directed to a process to manufacture an interconnected stack of thermoplastic frames having two sides by stacking the thermoplastic frames to obtain a stack of frames such that the facing sides of two neighbouring frames are in contact with each other at a contact area. When stacking a longitudinal conduit is formed which runs along the length of the stack and a branched conduit is formed at the contact area. The interconnected stack of thermoplastic frames are obtained by supplying a pressurised melt of a plastic material to the elongated conduit and branched conduits.

A cushion for positioning patients, including an outer cover, in which there is a bag, equipped with two separate compartments, which contain two components suitable for mixing with each other to form a polyurethane foam. The outer cover includes an outer surface made of non-woven fabric and an inner surface made of polymeric material, in such a way as to allow sealing of the outline of the outer cover, guaranteeing the impermeability of the cushion.

Methods of forming an article from a molten plastic composition comprising a polymer and a blowing agent. The methods include injecting the molten plastic composition into a mould, allowing the plastic composition to form a first solid skin adjacent to an in contact with a first cavity-forming surface of the mould and a second solid skin adjacent to and in contact with a second cavity-forming surface of the mould, and then opening the mould before the molten plastic composition between the first and second solid skins in at least one portion of the circumference of a region of the mould cavity defining an annular cross-section of the cavity has solidified.

A method for manufacturing ultrafine fibers having an average diameter of less than 1 m is implemented by an apparatus including a feeder and a drawing chamber in communication with the feeder via an orifice having a pressure difference. The method includes introducing a multifilament to the drawing chamber under the condition that the ratio of the cross-section of the multifilament to the cross-section of the orifice rectifier is 50% or less, and irradiating the discharged multifilament such that the center of the multifilament melted thereby is located 1 to 15 mm apart vertically below the orifice outlet to melt the leading portion of the multifilament and cause the multifilament to swing at a maximum angle of 5 to 80 degrees to the central orifice axis within a conical space, such that the melted leading portion of the multifilament is drawn by an air stream generated by the pressure difference.