BERRY PLASTICS SURLYN FILM

In further embodiments, at least the extruding, the casting, the stretching, and the relaxing are achieved via in-line processing. The MD-relaxed film exiting MD relaxing station 70 receives subsequent perforating at a slitting station 74 to form an apertured elastic film 2 in accordance with the present disclosure. Surlyn Skin Film, 26″ 7. In other embodiments, the present disclosure further provides personal hygiene products containing one or more apertured elastic films e. In a further example, the molten web is cast against the surface of the chill roll under a combination of negative pressure from a vacuum box, as shown in FIG. In illustrative embodiments, as noted above, an apertured elastic film 2 prepared in accordance with the present disclosure e.

In a further example, the polyolefin consists essentially of only linear low density polyethylene. For elastic films that are to be perforated in a relaxed state and subsequently subjected e. A rectangular sample one-inch wide was placed in Tensile tester grips that were two inches apart. Films prepared from the formulations XC The molten web is cast against a surface of a chill roll 64 under negative pressure from a vacuum box 62 to form a quenched film In further embodiments, at least the extruding, the casting, the stretching, and the relaxing are achieved via in-line processing. In additional embodiments, each of the extruding, the casting, the stretching, the relaxing, and the perforating is achieved via in-line processing. In one example, the skin layers may be independently selected from compositions designed to minimize the levels of volatiles building up on the extrusion die.

The elastic film has a basis weight of less than or equal to about 30 gsm. In one example, a multi-layer apertured elastic films in accordance with the present disclosure may be manufactured by feed block co-extrusion.

The process of clause 5, any other suitable clause, or combination of suitable clauses, wherein the polyolefin comprises linear low density polyethylene.

In a second set of ranges, the notched elongation to break for an apertured elastic film 2 having a basis weight of less than or equal to about 30 gsm—in some embodiments, less than or equal to about 25 gsm or 20 gsm—is in one of the following ranges: The process of clause 4, any other suitable clause, or combination of suitable clauses, further comprising perforating the relaxed film to introduce at least one aperture therein. In illustrative embodiments, the manufacturing process used to form the elastic film further includes stretching the quenched film to form a stretched film, relaxing the stretched film to form a relaxed film, and perforating the relaxed film to form at least one aperture therein.

The entire contents of both of these documents are hereby incorporated herein by reference, except that in the event of any inconsistent disclosure or definition from the present specification, the disclosure or definition herein shall be deemed to prevail. The following numbered clauses include embodiments that are contemplated and non-limiting: In a third set of ranges, the notched elongation to break for an apertured elastic film 2 having a basis weight of less than or equal to about 30 gsm—in some embodiments, less than or equal to about 25 gsm or 20 gsm—is in one of the following ranges: The at least one folded edge 78 shown in FIG.

  VAGAI CHANDRASEKAR MOVIES

The apertured elastic film of clause 49, any other suitable clause, or combination of suitable clauses, wherein the film has a multi-layer structure comprising at least one core film layer interposed between at least a first skin layer and at least a second skin layer.

One alternative is a 40 Ra pattern 40 micro-inch average roughness generated by a sand-blasting process on a chrome plated roll. The apertured elastic film of clause 58, any other suitable clause, or combination of suitable clauses, wherein the apertured elastic film has a basis weight of less than or equal to about 30 gsm.

Examples of industries that use skin packaging for this purpose are the aircraft, hydraulics and plumbing industries. In some embodiments, the non-woven layer and at least the second skin layer to which it is adjacent include the same polyolefin. In other embodiments, the present disclosure further provides personal hygiene products containing one or more apertured elastic films e.

The aperture elastic film of clause 48, any other suitable clause, or combination of suitable clauses, wherein a pladtics elongation to break of the apertured elastic film is equal to or greater than a notched elongation to break of a comparative apertured elastic film prepared without the stretching. A process for making an apertured elastic film comprising the steps of extruding a composition comprising a polyolefin, a styrene block copolymer, a non-styrene block copolymer, or a combination thereof to form a molten web, casting the molten web against a surface of a chill roll using an air knife, an air blanket, a vacuum box, or a combination thereof to form a quenched film, stretching the quenched film in a machine direction in at least a 2: For example, in some embodiments, the melt curtain is configured to hit the chill roll 38 within a distance berrry less than about 12 inches, 11 inches, 10 inches, 9 brry, 8 inches, 7 inches, 6 inches, 5 inches, 4 inches, 3, inches, 2 inches, or 1 inch.

Strapping Machines – S In illustrative embodiments, the basis weight is between about 20 gsm and about 30 gsm. Methods for manufacturing polypropylene are described in Kirk – Othmer Concise Encyclopedia of Chemical Technologypp. The embossed pattern P is a square pattern e.

PRESTRETCHED APERTURED ELASTIC FILM WITH RESISTANCE TO WEB BREAKS – Berry Plastics Corporation

The process of claim 17, wherein each of the second composition and the third composition comprises a polyolefin, wherein the first film layer is a core layer, and wherein each of the at least one second film layer and the at least one third film layer is an outer skin layer. Methods for film extrusion are also plastiics in U. A suitable film-forming process may be used to form a precursor film en route to forming an apertured elastic film.

Strapping Machines – T The process of claim 1, wherein the molten web is cast against the surface of the chill roll under positive pressure by the air knife. In the above-described exemplary film structures, each of the elastic film layers A may include two or more elastic film layers in order to better control other film properties, such as the ability to bond to nonwovens.

  HACIKO PRIBEH PSA ONLINE FILM CZ

In other embodiments, the compositions may be extruded via a blown co-extrusion process. The individual film layers in a multi-layer film structure in accordance with the present disclosure may be monolayers or co-extrusions.

A non-apertured elastic film 76 comprising an elastomer is shown in FIG. In illustrative embodiments, in the casting of the molten web against a surface of the chill roll, an exit temperature of cooling fluid passing through the chill roll is between about 50 degrees Fahrenheit and about degrees Fahrenheit and, in some examples, between about 75 degrees Fahrenheit and about degrees Fahrenheit.

An apertured elastic film comprising a polyolefin, a styrene block copolymer, a non-styrene block copolymer, or a combination thereof. Tensile test data for films prepared from formulation XC Neck-in refers to a reduction in width of the molten web that occurs as the web leaves the die.

Although the elastic film 76 is shown in FIG. The quenched film 66 is stretched by MD stretching from a series of rollers moving at different speeds e.

In other embodiments, a plaastics film in accordance with the present disclosure may contain one or a plurality of elastic film layers having a folded edge as shown in FIG.

You can allow, block or delete cookies installed on your computer by configuring your browser options installed on your computer. The cast film process involves the extrusion of molten polymers through an extrusion die to form a thin film. In illustrative embodiments, as noted suflyn, an apertured elastic film 2 prepared in accordance with the present disclosure e.

Each of the individual apertured elastic film layers or elastic film layers having a folded edge may be placed in any order within the inner layers of the multi-layer film structure.

The process of claim 17, wherein each of the second composition and the third composition comprises a polyolefin, and wherein the polyolefin is polyethylene, polypropylene, or a combination thereof. For such materials, the aged film has increased elasticity relative to the quenched film, and better results may be obtained when stretching is performed on the aged film. The elastic film 76 shown in FIG. Perforation of a relaxed film in accordance with the present disclosure may be achieved by a wide array of physical processes, including but not limited to those described in U.

Surlyn Skin Packaging Film

The process of clause 5, any other suitable clause, or combination of suitable clauses, wherein the apertured elastic film has a basis weight of less than or equal to about 40 gsm. In some embodiments, it may be beneficial to perform the stretching in an out-of-line operation.

In another example, the precursor film may be a multilayer film as suggested in FIG. The core layer 4 may include a thermoplastic polymer or combination of thermoplastic polymerswhereas the outer skin layers 6 and 8 may have either the same composition as the core layer 4 or a different composition than the core layer 4.