摘要:
Impact modified compositions having good impact performance can be made from a thermoplastic (e.g., a polyolefin such as polypropylene or HDPE) and a multi-block ethylene/α-olefin interpolymer. The compositions are easily molded and often have particular utility in making, for example, automotive facia, parts and other household articles.
摘要:
The invention provides a composition comprising at least the following: A) an ethylene/α-olefin interpolymer; B) an olefin-based polymer; and C) a crosslinking agent; and wherein the ethylene/α-olefin interpolymer of component A) has the following properties: i) has a density greater than, or equal to, 0.850 g/cc; ii) a molar ratio of “vinyl to total unsaturation” greater than, or equal to, 1/10; iii) an 1 10/12 ratio from 6.2 to 40.
摘要:
Disclosed herein is a polymeric composition. The polymeric composition includes: (A) a propylene/a-olefin interpolymer; (B) an ethylene-based polymer; (C) a block composite comprising: i) a propylene-based crystalline polymer; ii) an ethylene/a-olefin polymer; and iii) a block copolymer comprising a propylene-based crystalline block and an ethylene/a-olefin block. The polymeric composition provides improved heat seals when formed into film, film layer, or flexible containers such as a retort pouch.
摘要:
A polyolefin-based composition showing improved weldability using high frequency (HF) includes (1) a base polymer selected from (a) a homogeneously branched, linear or substantially linear ethylene/α-olefin copolymer; (b) a homogeneously branched propylene/α-olefin copolymer; or (c) a combination thereof; and (2) at least one secondary component selected from (a) an ethylene vinyl acetate copolymer having from 5 to 40 wt % vinyl acetate; (b) an ethylene-ethyl acrylate having from 5 to 25 wt % ethyl acrylate; and (c) a combination thereof. The combination of the specified polyolefin with the specified secondary component, which is a polar polymer, makes these formulations HF weldable, with a cohesive welding failure, a weld strength for 10 mil thick film greater than 7 lb/in (1.23 N/mm) at a weld time of less than or equal to 6 seconds. The formulations may also exhibit good calendering processability and mechanical properties.
摘要:
Thermoplastic compositions including component C, an ethylene/α-olefin interpolymer wherein the interpolymer has a Mooney Viscosity (ML 1+4, 125° C.) greater than, or equal to 55 and a ΔHf greater than, or equal to 36 J/g; and component D, a high density polyethylene (HDPE) are provided. In particular, the thermoplastic compositions are characterized by the ethylene/α-olefin interpolymer which is an ethylene/a-olefin/diene interpolymer having a rheology ratio (V0.1/V 100) at 190° C. greater than, or equal to 25. Also are provided the articles comprising the thermoplastic compositions.
摘要:
The invention provides a polyolefin composition comprising: A) a propylene-based polymer having a flex modulus of greater than 1500 MPa and an HDT of greater than 100° C.; B) an ethylene/α-olefin interpolymer having Tg of less than −30° C., a tan delta, measured at 0.1 radians/s at 190° C., of less than 3, an HDT that is greater than, or equal to, the peak melting temperature of the ethylene/α-olefin interpolymer, measured by differential scanning calorimetry; and C) a fiber filler; and D) a nitrogen source and/or a phosphorus source, wherein at least one source is derived from at least one organic compound, or salt thereof; and wherein the weight ratio of the propylene-based polmer:ethylene/α-olefin interpolymer (A:B) is from 9:1 to 6:4.
摘要:
A composition of matter particularly well suited for use as a peelable seal layer is described. The composition comprises from about 50 to about 85 percent by weight of a first polymer and from 15 to 50 percent of a second polymer. The first polymer is a propylene based polymer characterized by having a melting point of at least 125° C. together with a Comonomer Composition Distribution Breadth (“CCDB”) less than 2. The second polymer is characterized by having an interfacial adhesion with the first polymer of less than 1 lb/inch.
摘要:
Artificial leather comprising a multi-layer structure comprises a top coating layer, a middle foam layer, and a bottom fabric layer. The top coating layer comprises a propylene- alpha-olefin copolymer in combination with one or more elastomeric compounds, the foam layer also comprises a propylene-alpha-olefin copolymer in combination with one or more elastomeric compounds plus a blowing agent, and the fabric layer comprises a nonwoven spunbond material.