A method for drying polyolefin-containing particles includes a drying step of supplying polyolefin-containing particles to a drying container, supplying a drying gas to the drying container, and drying the polyolefin-containing particles in the drying container. In the drying step, a numerical value determined by the following formula (a) is 441 or more and 600 or less.

38.0×[η]CXIS [dL/g]−0.500×CXIS content [% by mass]+1.20×particle temperature during drying [K]+3.29×drying time [hr]  Formula (a):

A resin composition having a hi ah blending proportion of an inorganic substance powder that can produce a stretched sheet having an excellent elongation property and high whiteness and opacity. A resin composition for producing a stretched sheet including: a first thermoplastic resin, a second thermoplastic resin different from the first thermoplastic resin, and an inorganic substance powder, in which a mass proportion of the first thermoplastic resin and the inorganic substance powder is 50:50 to 10:90, a content of the second thermoplastic resin is 1% by mass or more and 7% by mass or less relative to a total amount of the first thermoplastic resin and the inorganic substance powder, and the second thermoplastic resin is low stereoregular polypropylene.

A molded article of polypropylene-based resin expanded beads, obtained by in-mold molding of the polypropylene-based resin expanded beads, each bead including: a core layer, in a foamed state, having a polypropylene-based resin; and a covering layer, which covers the core layer, having a polyethylene-based resin. A molded article magnification X [times] of the molded article is 55 times to 90 times, a value of a product X.Math.σ.sub.50 of a 50% compressive stress σ.sub.50 [kPa] and the molded article magnification X is 6500 or more, and a 5% compressive stress σ.sub.5 of the expanded beads molded article is 5 kPa to 25 kPa.

The invention relates to a glass fiber-reinforced thermoplastic polymer composition comprising a sheathed continuous multifilament strand comprising a core that extends in the longitudinal direction and a polymer sheath which intimately surrounds said core, wherein the core comprises an impregnated continuous multifilament strand comprising at least one continuous glass multifilament strand, wherein the at least one continuous glass multifilament strand is impregnated with an impregnating agent, wherein the polymer sheath consists of a thermoplastic polymer composition comprising a thermoplastic polymer, wherein the glass fiber-reinforced thermoplastic polymer composition comprises a liquid color composition comprising a pigment and a liquid carrier comprising a dicarboxylic acid ester and/or an unsaturated long-chain aliphatic fatty acid having 13 to 21 carbon atoms.

Blown films, especially monolayer blown films, of high stiffness, the blown films comprising at least 95.0 wt % of a specific propylene-1-butene random copolymer.

Provided is a thin film-shaped fiber-reinforced resin that can sufficiently increase the impact resistance of a coated resin molded body while suppressing the reduction in bending elastic modulus of the resin molded body. The thin film-shaped fiber-reinforced resin includes a plurality of reinforcing fibers that are arranged in a single direction alignment, and a matrix resin with which the reinforcing fibers are impregnated. The matrix resin includes a thermoplastic plastic and a thermoplastic elastomer. The content of the thermoplastic elastomer with respect to the total of the thermoplastic plastic mass and the thermoplastic elastomer mass is 5-40 mass %.

An expanded bead having a through hole and including a foamed core layer which defines the through hole therein and which is constituted of a resin composition containing two kinds of polypropylene-based resins having different melting points, and a cover layer covering the foamed core layer and constituted of a polyolefin-based resin. The expanded bead gives a DSC curve in which an endothermic peak intrinsic to the resin composition and another endothermic peak on a higher temperature side thereof appear in a specific heat of fusion ratio. Molded articles include a multiplicity of the expanded beads.

A stretch film (1) contains an olefin elastomer and an inorganic filler (3). Stress at 50% elongation is 6.0 N or more and 15.0 N or less, and moisture permeability is 1000 g/(m.sup.2.Math.24 h) or more.

The present invention provides polymer compositions having improved corrosivity, color stability and clarity. Also disclosed is a process of preparing the polymers. The process may comprise incorporating into the polymer an acid neutralizing amount of an amorphous aluminum silicate. The amorphous aluminum silicate may be present in the polymer in an amount such that the polymer composition having a Corrosivity Index of less than 6. A refractive index of the amorphous aluminum silicate may be the same or substantially the same as a refractive index of the polymer.

The invention provides a polyolefin-based resin film formed from a polypropylene-based resin composition, the polyolefin-based resin film containing: in 100 parts by weight of a polypropylene-based resin composition, 40 to 97 parts by weight of a propylene-ethylene block copolymer; 0 to 50 parts by weight of a propylene-α olefin random copolymer or a propylene homopolymer; and 3 to 10 parts by weight of at least one type of an elastomer selected from the group consisting of an ethylene-propylene copolymer elastomer, a propylene-butene copolymer elastomer, and an ethylene-butene copolymer elastomer, wherein a heat shrinkage ratio in a longitudinal direction is not lower than 1% and not higher than 9%, and an x-axis orientation coefficient ΔNx calculated from a refractive index is not less than 0.0150 and not larger than 0.0250. The invention also provides a laminated body containing the polyolefin-based resin film, as well as a packaging body formed therefrom.