Plastomer

About: Plastomer is a research topic. Over the lifetime, 388 publications have been published within this topic receiving 4160 citations.

Multilayer machine direction oriented films for sealing

Abstract: A multilayer machine direction oriented film for sealing comprising at least one layer A and one layer B, wherein layer A comprises 25 to 75 wt%, based on the total weight of the layer, of at least one multimodal linear low density polyethylene (LLDPE) copolymer with one C4-12 alpha olefin having a density of 910 to 925 kg/m3 and an MFR2 of 0.05 to 5 g/10min which comprises a lower molecular weight (LMW) component and a higher molecular weight (HMW) component; and 25 to 75 w%, based on the total weight of the layer, of at least one ethylene based plastomer with a density between 870 and 900 kg/m3, and wherein layer B comprises 75 to 100 wt% or < 100 wt%, based on the total weight of the layer, of at least one multimodal copolymer of ethylene with at least one C4-12 alpha olefin having a density of 915 to 940 kg/m3 and an MFR2 of 0.1 to 5 g/10min.

Composite polymer films

Abstract: A composite film includes a) a self-supporting layer of a polymer film (such as a polyester), b) an optional primer layer on the polymer film layer, wherein the primer layer includes a PVdX (X being halo), acrylic or vinyl resin; and c) a layer of heat seal composition on the primer layer, wherein the heat seal composition includes a polyolefin plastomer (POP) resin and a tackifier that constitutes at least 20 wt % of the heat seal composition. The composite film may be formed by applying a coating composition including the heat seal composition in a solvent to a primer layer on the polymer film or directly on the polymer film in absence of the optional primer layer, and then evaporating the solvent. The composite film may be heat-sealed to a surface of a container or a self-supporting film.

Soft and transparent copolymers of propylene

Abstract: FIELD: manufacturing technology.SUBSTANCE: invention relates to a polypropylene composition (C) which is intended for making a film, a film made from said composition, as well as a method of producing a polypropylene composition (C). Polypropylene composition contains a heterophase propylene copolymer (RAHECO) and plastomer (PL). Heterophase propylene copolymer (RAHECO) contains a matrix (M) representing a disordered propylene copolymer (R-PP) and an elastomeric propylene copolymer (E) dispersed in said matrix (M). Comonomers of random copolymer of propylene (R-PP) and elastomeric copolymer of propylene (E) are ethylene and/or C-Colefins. Plastomer (PL) is a copolymer of ethylene and at least one C-Cα-olefin with density of less than 0.900 g/cmand melt flow rate MFR(190 °C/2.16 kg) from 10.0 to 40 g/10 minutes. Method of producing polypropylene composition (C) involves first polymerisation of propylene and ethylene and/or C-Cα-olefin in first reactor (R1). First fraction of a random copolymer of propylene (R-PP1) is obtained, which is transferred to a second reactor (R2). Further, polymerisation is carried out in the presence of a first fraction of a random copolymer of propylene (R-PP1) and ethylene and/or C-Cα-olefin. Second fraction of random copolymer of propylene (R-PP2) is obtained. First fraction of the random propylene copolymer (R-PP1) and the second fraction of the random propylene copolymer (R-PP2) form a random copolymer of propylene (R-PP), which is transferred to a third reactor (R3). After that, polymerisation is carried out in the presence of random copolymer of propylene (R-PP) and/or C-Cα-olefin. Third polymer fraction is obtained, which is an elastomeric copolymer (E). Propylene copolymer (R-PP) and the propylene elastomeric copolymer (E) form a heterophase propylene copolymer (RAHECO). Then a heterophase propylene copolymer (RAHECO) is mixed in the melt with a plastomer (PL). Film is made from said polypropylene composition.EFFECT: invention enables to obtain a polypropylene composition having improved optical and mechanical properties.13 cl, 1 dwg, 2 tbl, 3 ex

A toothed belt and manufucturing process

Abstract: Described herein is a toothed belt (1) comprising a body (2) made of elastomeric material, in which there is embedded a plurality of longitudinal filiform resistant inserts or cords (3), and a toothing (4) coated with a coating fabric (5); on top of the coating fabric (5) there is made to adhere a resistant layer (8), which increases resistance to wear of the toothed belt and comprises a fluorine-based plastomer with addition of elastomeric material, in which the plastomer is present in a larger amount than is the elastomeric material and in which the majority of the particles constituting the fluorine-based plastomer have a size less than 10 µm. The resistant layer (8) is applied directly on the fabric (5) via spreading. The fluorinated plastomer preferably has a base of polytetrafluoroethylene compound.

Multilayer thermoplastic film with improved puncture resistance performance

Abstract: The present disclosure provides for a heat-shrinkable, biaxially stretched, multilayer thermoplastic film that includes at least a puncture resistant layer. The puncture resistant layer is formed with a polyethylene based plastomer having a density of 0.890 g/cm3 to 0.910 g/cm3 as measured in accordance with ASTM D-792, and a melt index (MI) as measured by ASTM D-1238 at 190 °C/2.16 kg from 0.20 g/10 minutes to 1.5 g/10 minutes. The polyethylene based plastomer has a logM25% of an upper 25% of a GPC quadrant having a value of 5.1 to 5.7, an intermediate molecular weight distribution (Mw/Mn) of 2.5 to 3, a Mz/Mw value of 2 to 2.5, a Comonomer Distribution Constant value from 60 to 400 and a single SCBD peak between 40-85 °C with a mass fraction of less than 3% above 85 °C as determined by CEF, and a ZSVR value from 1.0 to 5.5. The multilayer thermoplastic film is biaxially stretched at a temperature of 60 °C to 120 °C with a blow-up ratio from 2:1 to 10:1.