The present invention relates to a polymer blend and the film of the polymer blend or the film layers of the polymer blend as a surface layer or coating. More particularly, the invention relates to a polymer blend which may be extruded as such or extruded onto one or both sides of packaging film to give a sealing surface(s) which exhibits surprisingly heat sealability suitable for form-fill-and-seal-packaging. The present invention also relates the use of ethylene based plastomer to reduce sealability of films comprising polypropylene.

The patent application discloses a polypropylene-plastomer-blend comprising ethylene-based plastomer, which—after conversion into final articles and exposing to surface modification like corona treatment, shows improved dyne retention behaviour and improved dyne retention ratio over time. Further disclosed are final articles and a process how to provide compositions and final articles having improved dyne retention behaviour.

A polymer composition comprises a thermoplastic polymer, a polymer additive selected from the group consisting of nucleating agents, clarifying agents, and combinations thereof, and a fluoropolymer. A molded article comprises at least one wall defining a cavity, the wall having an opening therein permitting access to the cavity. The wall comprises a polymer composition comprising a thermoplastic polymer, a polymer additive selected from the group consisting of nucleating agents, clarifying agents, and combinations thereof, and a fluoropolymer. A method for molding a polymer composition is also provided.

The present invention relates to fiber polymer composite comprising polypropylene fibers and a matrix material, the matrix material being in direct contact with at least some of the fibers, characterized in that the matrix material comprises 50% to 100% by weight based on the whole matrix material of an amorphous propylene-rich poly-alpha-olefin, to a process for producing the fiber polymer composite, and to the use of the fiber polymer composite.

Blown films based on a blend of a C.sub.2C.sub.3 random copolymer and a C.sub.2-based plastomer, which combine low scaling initiation temperature (SIT), good optical properties and an improved stiffness/impact balance, and which also show an excellent sterilization behaviour.

Fiber reinforced composite comprising a polypropylene with high melting temperature and very narrow molecular weight distribution.

The present invention relates to an olefin polymerization process, wherein propylene and 1-butene and optionally ethylene are reacted in the presence of a Ziegler-Natta catalyst system so as to obtain a polypropylene, wherein the polypropylene comprises 1-butene-derived comonomer units in an amount of from 0.5 to 15 wt % and optionally ethylene-derived comonomer units in an amount of up to 3 wt %, and the Ziegler-Natta catalyst system comprises an external donor of the formula (I)

(R.sup.3).sub.z(R.sup.2O).sub.YSi(R.sup.1).sub.X  (I).

Polypropylene mono-layer films produced with blown film or cast film technology comprising a blend of: a) 75.0 to 98.0 wt %, based on the blend, of a random propylene copolymer and b) 2.0 to 15.0 wt %, based on the blend, of an ethylene based plastomer having a density according to ISO 1183D of 0.915 g/cm.sup.3 or below and an MFR.sub.2 according to ISO 1133 (190° C.; 2.16 kg) in the range of 2.0 to 30 g/10 min, wherein the film has simultaneously improved optic properties as well as tear resistance compared to random propylene copolymer based films without ethylene based plastomer.

A method for stirring resin pellets, which includes stirring adhesive resin pellets in a liquid in a stirring tank equipped with a stirring impeller, under the condition satisfying the following relational expression (I):

[00001]$\begin{array}{cc}\frac{\rho .Math..Math.{\left({\mathrm{Np}}^{1/3}.Math.\mathrm{nD}\right)}^2}{\Delta .Math..Math.\mathrm{pgdp}}\geqq 10& \left(I\right)\end{array}$

wherein ρ is the density of the liquid (kg/m.sup.3), Np is the power number of the stirring impeller, n is the rotational speed (1/s), D is the diameter of the stirring impeller (m), Δρ is the difference in density between the resin pellets and the liquid (kg/m.sup.3), g is the gravitational acceleration (m/s.sup.2), and dp is the particle diameter of the resin pellets (m).

This invention relates to the use of ethylene/propylene random copolymers for the production of films having low-haze. In particular, the present invention involves the use of ethylene/propylene random copolymer comprising 90-96.5 wt % propylene and 3.5-10 wt % ethylene demonstrated to have low haze. This invention also relates to an ethylene/propylene random copolymer composition comprising about 3.5-10 wt % ethylene content and about 90-96.5 wt % propylene content, for production of a low-haze film.