摘要:
Disclosed is a method of producing a novel biaxially oriented film having a high diffraction of light, and flexibility. In particular, the invention disclosed provides a method for making an opaque impact copolymer film by stretching in two dimensions an impact polypropylene copolymer. The invention is disclosed to be useful for making a material particularly suitable for a variety of applications including labeling media, food packaging and laminates. Also disclosed is a multilayer film having a first impact polypropylene copolymer layer and a second layer of another polymer wherein the multilayer film has significantly reduced haze. Also disclosed is film produced with a filler that has increased porosity and flexibility.
摘要:
Preforms for use in injection blow molding processes and such processes are described herein. The preforms can have both a body and a neck wherein the external body diameter of the preform is at most 95% of the external neck diameter. The body comprises internal and external diameters that together form a sidewall, the thickness of which can be greater than 2.0 mm. Also disclosed is a mold for the injection molding of the preform described above.
摘要:
Disclosed is a polystyrene based polymer/layered compound nanocomposite for injection blow molding or injection stretch blow molding of articles. The nanocomposite can reduce shrinkage and warpage to the preform during the reheating process compared to neat polystyrene. The incorporation of layered compounds can increase the processability of PS preforms, help improve heating efficiency, and improve bottle mechanical properties. The layered compound can be treated with chemicals or compounds having an affinity with the styrene monomer or polystyrene, thus producing a treated layered compound having an affinity with the styrene monomer or polystyrene. The monomer and the layered compound can be combined prior to polymerization. The polymer and layered compound can be combined by solution mixing in a solvent. The layered compound can also be incorporated into the mixture by compounding a polymer product with the layered compound, or the combination of any of the above three approaches.
摘要:
Disclosed is a polystyrene based polymer/layered compound nanocomposite for injection blow molding or injection stretch blow molding of articles. The nanocomposite can reduce shrinkage and warpage to the preform during the reheating process compared to neat polystyrene. The incorporation of layered compounds can increase the processability of PS preforms, help improve heating efficiency, and improve bottle mechanical properties. The layered compound can be treated with chemicals or compounds having an affinity with the styrene monomer or polystyrene, thus producing a treated layered compound having an affinity with the styrene monomer or polystyrene. The monomer and the layered compound can be combined prior to polymerization. The polymer and layered compound can be combined by solution mixing in a solvent. The layered compound can also be incorporated into the mixture by compounding a polymer product with the layered compound, or the combination of any of the above three approaches
摘要:
A method comprising preparing a styrenic polymer composition, melting the styrenic polymer composition to form a molten polymer, injecting the molten polymer into a mold cavity to form a preform, heating the preform to produce a heated preform, and expanding the heated preform to form an article. A method comprising substituting a styrenic polymer composition comprising from 0 wt. % to 6.5 wt. % plasticizer and equal to or greater than 2.5 wt. % elastomer for polyethylene terephthalate in an injection stretch blow molding process, wherein the wt. % is based on the total weight of the polymeric composition. A method comprising preparing a preform from a styrenic polymer composition, subjecting the preform to one or more heating elements, and rapidly heating the preform to produce a heated preform.
摘要:
A film having a seal strength of at least 100 grams force/inch and a seal initiation temperature of less than about 100 ° C. A polymeric composition comprising a metallocene catalyzed random ethylene-propylene copolymer and a propylene/alpha olefin copolymer or ethylene/alpha olefin copolymer. An article comprised of a film having a seal strength of at least 100 grams force/inch and a seal initiation temperature of less than about 100 ° C.
摘要:
A polymeric composition having a MFR of less than 2 g/10 min. which when formed into a film has an oxygen transmission rate of equal to or greater than 300 cc/100 in2/24 h at 73° F. and 0% relative humidity per ASTM D 3895 and a water vapor transmission rate of equal to or greater than 0.5 g/100 in2/24 hrs at 100° F. and 100% relative humidity per ASTM F 1249. A polymeric film having a 2% secant modulus in the machine direction of 300 MPa to 700 MPa; an oxygen transmission rate of greater than 300 cc/100 in2/24 h at 100° F., a water vapor transmission rate of greater than 0.5 g/100 in2/24 hrs at 100° F. and 100% relative humidity; an Elmendorf tear strength in the MD of from 50 g to 400 g; an Elmendorf tear strength in the transverse direction of from 150 g to 400 g, a dart drop strength of from 200 g to about 500 g, a haze of from 0% to 85% and, gloss at 45° of from 5% to 70%.
摘要:
It has been discovered that the properties of heat shrinkable sheet or film materials of ethylene/propylene rubber impact-modified heterophasic copolymer (ICP) can be improved by blending the ICP with a second polyolefin. The second polyolefin may be a syndiotactic polypropylene (sPP), a random copolymer (RCP) of propylene and a comonomer (e.g. ethylene and/or butene) made using a Ziegler-Natta or metallocene catalyst. A cavitating agent may be optionally included. The heat shrinkable sheet or film materials may also be biaxially oriented. Property differences in films made with the inclusion of the second polyolefin and possibly the cavitating agent include, but are not necessarily limited to, reduction in yield stress, increased density, decreased cavitation, increased light transmittance, increased shrinkage, among other physical and mechanical properties.
摘要:
An opaque polymer film is prepared by admixing high crystalline polypropylene with a microvoid causing filler and extruding to form a sheet that is then biaxially stretched to form an opaque film. End uses for these films include soda bottles, candy wrappers and synthetic paper.
摘要:
An opaque polymer film is prepared by admixing high crystalline polypropylene with a microvoid causing filler and extruding to form a sheet that is then biaxially stretched to form an opaque film. End uses for these films include soda bottles, candy wrappers and synthetic paper.