B29K2023/0633

CONTINUOUS EXTRUDER PROCESS FOR MANUFACTURING RHEOLOGY-MODIFIED POLYOLEFIN FOR CABLE INSULATION LAYER
20230191660 · 2023-06-22 ·

Rheology-modified, additive-containing ethylenic polymer compositions are prepared in a continuously operated extruder comprising first, second and third zones by a process comprising the steps of: mixing in the second zone of the extruder an ethylenic polymer and a high-temperature decomposing peroxide at a temperature such that the half-life of the peroxide is equal to or greater than (≥) one minute and for a sufficient period of time to modify the rheology of the ethylenic polymer to produce a rheology-modified, melted ethylenic polymer for transfer to the third zone of the extruder; and adding to the third zone one or more additives to the rheology-modified, melted ethylenic polymer to produce the rheology-modified, additive-containing ethylenic polymer.

MULTILAYER FILMS, METHODS OF MANUFACTURE THEREOF AND ARTICLES COMPRISING THE SAME

Disclosed herein is a multilayered article comprising a core layer comprising a thermoplastic polymer; where the thermoplastic polymer comprises a polyolefin, thermoplastic starch, and a compatibilizer; where the compatibilizer does not contain ethylene acrylic acid; where the polyolefin is not polypropylene and where the polyolefin present in an amount of greater than 40 wt %, based on a total weight of the core layer; a first layer comprising a thermoplastic resin; and a second layer comprising a thermoplastic resin; where the first layer and the second layer are devoid of fillers; where the first layer is disposed on a side of the core layer that is opposed to the side that contacts the second layer; where the multilayered article has an optical clarity of greater than 80% when measured as per ASTM D 1746 and a total haze less than 8% when measured as per ASTM D 1003.

METHOD OF FORMING POLYMERIC BAGS
20230182997 · 2023-06-15 ·

The present invention relates to improvements for the manufacturing of a wave-cut bag of polymeric film, more specifically a wave-cut bag with a body having improved shock, tear and puncture resistance. The polymeric film has an embossed pattern of a plurality of embossed regions that are comprised of a plurality of parallel, linear embosses. Further disclosed is a process for intermittently applying the embossed pattern to a collapsed tube of a blown film extrusion process. The collapsed tube with the intermittently applied embossed pattern is particularly well suited for constructing wave-cut trash bags with the embossed pattern applied to a central body of the wave-cut bags.

WOVEN IRRIGATION TUBING, APPARATUS AND METHOD OF MAKING SAME
20220372674 · 2022-11-24 · ·

Woven irrigation tubing comprises a woven, extrusion coated & laminated tube formed of a high density polyethylene (HDPE) outer layer, a low density polyethylene (LDPE) middle layer and a linear low density polyethylene (LLDPE) inner layer. The finished tubing is treated for ultraviolet resistance. The tubing is tied off at a distal end with a proximal end connected to a pressurized irrigation source. Watering holes are created in the tubing at spaced intervals and the resulting water streams are directed into parallel plowed furrows. The tubing is completely recyclable. The tubing is formed by manufacturing tape for the woven outer tubing cover, stretching the tape along its length to strengthen it, weaving the outer layer from the tape, flattening the woven outer layer, extrusion coating each surface of the outer layer with LDPE, laminating the LLDPE inner layer to the LDPE, reversing and winding the tubing for storage and distribution.

Cable made from crosslinkable composition with antioxidant and beneficial methane formation

The invention relates to a cable comprising layer(s), which layer(s) is/are obtained from a polymer composition comprising a polyethylene, a crosslinking agent and antioxidant(s), characterized in that the polymer composition contains a total amount of vinyl groups which is B vinyl groups per 1000 carbon atoms, and B.sub.1≤B, wherein B.sub.1 is 0.12, when measured prior to crosslinking according to method ASTM D6248-98, the crosslinking agent is present in an amount which is Z wt %, prior to crosslinking, based on the total amount (100 wt %) of the polymer composition, and Z.sub.1≤Z≤Z.sub.2, wherein Z.sub.1 is 0.005 and Z.sub.2 is 2.0, and that the antioxidant(s) is/are nitrogen containing antioxidant(s) being present in an amount which is W wt %, prior to crosslinking, based on the total amount (100 wt %) of the polymer composition, and W.sub.1≤W≤W.sub.2, wherein W.sub.1 is 0.005 and W.sub.2 is 1.0, the cable, e.g. a power cable, and processes for producing the cable; the cable useful in different end applications, such as wire and cable (W&C) applications.

Core-sheath filaments and methods of printing an adhesive

A core-sheath filament having a non-tacky sheath and a hot-melt processable adhesive core, the sheath exhibiting a melt flow index of less than 15 grams per 10 minutes, is provided. Methods of making the core-sheath filament and methods of using the core-sheath filament to print a hot-melt processable adhesive onto a primer-treated substrate surface to provide a structural bond are described.

Woven irrigation tubing, apparatus and method of making same
11674619 · 2023-06-13 ·

Woven irrigation tubing comprises a woven, extrusion coated & laminated tube formed of a high density polyethylene (HDPE) outer layer, a low density polyethylene (LDPE) middle layer and a linear low density polyethylene (LLDPE) inner layer. The finished tubing is treated for ultraviolet resistance. The tubing is tied off at a distal end with a proximal end connected to a pressurized irrigation source. Watering holes are created in the tubing at spaced intervals and the resulting water streams are directed into parallel plowed furrows. The tubing is completely recyclable. The tubing is formed by manufacturing tape for the woven outer tubing cover, stretching the tape along its length to strengthen it, weaving the outer layer from the tape, flattening the woven outer layer, extrusion coating each surface of the outer layer with LDPE, laminating the LLDPE inner layer to the LDPE, reversing and winding the tubing for storage and distribution.

SYSTEMS AND METHODS FOR INTERLEAVING MATERIAL IN PRINTED ROLLED SUBSTRATE MATERIALS TO PREVENT OFFSET
20170341291 · 2017-11-30 ·

A system and method are provided for implementing a process by which printed rolls of substrate material web have additional material layers interleaved between the rolled material web layers to substantially eliminate back transfer or roll offset of printed images on the back sides of the rolled material substrates. In a process for pre-printing thermoforming grade plastic materials to produce rolls of substrate material for use in a thermoforming process, ink compositions, particularly adapted for the thermoforming process, are deposited on substantially continuous webs of substrate material. The webs of substrate material are then re-rolled with separate layers of low surface energy substrate material interleaved between the layers of the printed substrate material in order to substantially eliminate imaging defects produced by back transfer of printed images on to the backs of layers of the printed substrate material stored in rolls.

Crystal clear high barrier packaging film
11673309 · 2023-06-13 ·

A transparent multilayer coextruded heat shrinkable barrier film is useful for high-value packaging applications such as food and medical device packaging. The transparent multilayer coextruded heat shrinkable barrier film includes first and second outer layers formed using a transparent polyester or polyester copolymer; an inner nanolayer sequence including a plurality of nanolayers a) including ethylene vinyl alcohol, alternating with nanolayers b) including at least one of ethylene ethyl acrylate, low density polyethylene and linear low density polyethylene, each of the nanolayers b) having a degree of crystallinity less than about 45%; and adhesive layers between each of the two outer layers and the inner nanolayer sequence. The film has a light transmittance of at least about 80% and a heat shrunk of at least about ten percent in at least one direction.

Edge attached film-foam sheet

The present disclosure generally relates to devices and methods for furniture protection. More particularly, the present disclosure relates to foam-film sheets configured to protect furniture from damage. An exemplary foam-film sheet as disclosed herein includes a sheet of foam material having a first lateral edge and a second lateral edge; a sheet of film material having a first lateral edge and a second lateral edge; a first seal between a portion of the foam material proximate its first lateral edge and a portion of the film material proximate its first lateral edge; and a second seal between a portion of the foam material proximate its second lateral edge and a portion of the film material proximate its second lateral edge, wherein the film and foam are substantially unseated along the entire transverse width between the first and second sealed portions near the lateral edges of the foam material.