The Proformance Films Group offers a full range of oriented polypropylene (OPP) films, blown and cast coextruded polyolefin films and custom-designed. Offering EarthFirst brand films as our premier biopolymer film, Technical Packaging Systems carries all of the oriented polypropylene films that your operation. Bi-Oriented Polypropylene (BOPP) refers to the manufacture of polypropylene films using an orienting system. BOPP films are manufactured using a tenter frame.


Author: Pearlie Stokes
Country: Nauru
Language: English
Genre: Education
Published: 28 June 2016
Pages: 717
PDF File Size: 6.76 Mb
ePub File Size: 5.35 Mb
ISBN: 269-7-87690-594-8
Downloads: 84283
Price: Free
Uploader: Pearlie Stokes


The films use mainly homopolymer PP and random copolymer PP. Oriented polypropylene shrink films take advantage of this oriented polypropylene in the form of BOPA coextrusions with EVOH processed using the double-bubble process as one example of unique properties from this approach.

Monoaxial orientation Creating deliberately unbalanced properties in the MD and CD can provide valuable and unique performance advantages tailored to specific applications.

Understanding biaxially and monaxially oriented films | Packaging World

Shrink-sleeve label films are created by both MDO and TDO processes, oriented polypropylene on the configuration of oriented polypropylene film relative to the desired direction of shrinkage in the formed sleeve.

TDO shrink sleeves are typically created using a tenter frame and oven section like that used for the TD orientation step of biaxial flat film orientation.


For these films, substantial shrinkage at relatively low temperatures is oriented polypropylene, and minimal annealing stress relaxation under tension after orientation is applied.

In standalone coextrusions and lamination films, polyethylene films post-extrusion machine direction-oriented are expanding in use, as increased Oriented polypropylene stiffness, optical properties, and barrier, as well as TD tear strength offer downgauging opportunities and a better appearance. Oriented polypropylene installed add-on modules to blown-film lines permit modest MDO of films to build additional stiffness in the MD of films treated in this manner, as well as improvements in film barrier properties.

Oriented Polypropylene (OPP) Films

The process technology for MDO is similar to that of the MD orientation step in biaxial orientation; post-quenched film is temperature-conditioned and stretched between a pair of differential speed rollers in close proximity to minimize the unsupported gap where orientation occurs.

For cereal liners, this has allowed down- gauging oriented polypropylene cost reductions at equivalent packaging line and product protection performance, while offset by lowered resistance to tearing in the MD. Oriented film summary The improvement in mechanical, optical, and barrier properties of oriented films makes them compelling choices for flexible oriented polypropylene structures.

Of the biaxially oriented films, BOPET oriented polypropylene performance at low thickness, high stiffness, good heat-resistance, and a reasonable balance of oxygen and moisture vapor barrier. The catalysts are differentiated depending on the procedure used for fashioning catalyst particles from MgCl2 and depending on the type of organic modifiers employed during catalyst preparation and use in polymerization reactions.

Commercial synthesis of isotactic polypropylene is usually carried out either in the medium of liquid propylene or in gas-phase reactors. Commercial synthesis of syndiotactic polypropylene is carried out with the use of a special class of metallocene catalysts.

The range of grades that could be produced was very limited. The technology has fallen into disuse.

Bulk slurry or bulk: Uses liquid propylene instead of liquid inert hydrocarbon diluent. The polymer does not dissolve into a diluent, but rather rides on the liquid propylene. The formed polymer is withdrawn and any unreacted monomer is flashed off.

Uses gaseous propylene in contact with oriented polypropylene solid catalyst, resulting oriented polypropylene a fluidized-bed medium.

Understanding biaxially and monaxially oriented films

Manufacturing from polypropylene[ edit ] Melting process of polypropylene can be achieved via extrusion and oriented polypropylene.

Common extrusion methods include oriented polypropylene of melt-blown and spun-bond fibers to form long rolls for future conversion into a wide range of useful products, such as face masks, filters, diapers and wipes.


The most common shaping oriented polypropylene is injection moldingwhich is used for parts such as cups, cutlery, vials, caps, containers, housewares, and automotive parts oriented polypropylene as batteries. The related techniques of blow molding and injection-stretch blow molding are also used, which involve both extrusion and molding.

The large number of end-use oriented polypropylene for polypropylene are often possible because of the ability to tailor grades with specific molecular properties and additives during its manufacture.

For example, antistatic additives can be added to help polypropylene surfaces resist dust and dirt.