MXPA00004969A - Flushable release liners and methods of making the same - Google Patents

Abstract

The present invention is directed to a flushable water-sensitive film, which maintains its integrity and strength when in use, but disperses when placed in contact with water, such as in a conventional sink or toilet. Moreover, the present invention is directed to a flushable release liner, which performs like conventional release papers, but adds the convenience of disposal by flushing in a sink or toilet. The present invention is also directed to products, which contain a flushable water-sensitive film or release liner.

Description

T DISPOSABLE RELIABLE LINES WITH WATER DISCHARGE AND METHODS FOR THE MANUFACTURE OF THEM FIELD OF THE INVENTION 5 The present invention is directed to a disposable release liner with water discharge. The disposable release liner with water discharge is formed by applying a release coating over at least one surface of the film sensitive to water. The disposable release liner with water discharge maintains its structural integrity and strength when in use, but disperses when placed in contact with water, such as in a conventional lavatory or lavatory. In addition, the present invention is directed to products, including disposable products with water discharge and non-disposable products with water discharge, which contain a releasable and disposable liner with water discharge.

BACKGROUND OF THE INVENTION Disposable products have dramatically altered the modern lifestyle, adding great convenience to the daily life of society. Such products are generally relatively cheap, sanitary, and easy and quick to use. The disposal of such products, however, is increasingly a problem when the landfills are closed and because incineration contributes to smog and urban pollution. Consequently, there is an urgent need for disposable products that can be discarded without being thrown into a landfill or without incineration. An ideal waste alternative would be the use of municipal drainage treatment and private residential septic systems. The products suitable for disposal in waste systems that can be discharged with discharge in a conventional toilet are called "disposable with discharge of water". An essential feature of disposable products with water discharge is that they must have sufficient strength for their intended use, but still lose structural integrity in contact with water.

Numerous attempts have been made to produce disposable materials with water discharge that retain their integrity and resistance for intended use but can be disposed of by discharging with water in conventional toilets. One approach to producing a disposable product with water discharge is to limit the size of the product so that it easily passes through the plumbing without causing obstructions or blockages. Such products often have a high resistance to wetting and do not disintegrate during discharging with water discharge. Examples of this type of product include cleaning cloths such as baby wipes. This approach to waste with water discharge suffers from the disadvantage, however being restricted to small items. Many disposable products with current water discharge are limited to such small items.

Numerous consumer products which were formerly unable to be disposed of in a conventional toilet, are now made disposable with water discharge. Such products include water-soluble film, cleaning cloths, d-cap applicators, etc. However, many consumer products have remained non-disposable with water discharge.

One such product that has remained non-disposable with water discharge to date is the releasable liner. The releasable liners are used to temporarily cover an adhesive layer before use in many articles or personal care products. The release liner provides protection to the adhesive layer against exposure to the materials, which could adversely affect the ability of the adhesive strip to adhere to a desired substrate and provide protection against premature or unwanted adhesion to a substrate. Conventional releasable liners comprise a paper substrate coated with a releasable coating. The release liner is formulated to provide very little adhesion to coated paper with any other substrate, particularly pressure sensitive hot melt adhesives, so that the release liner can be easily removed from the adhesive strip if it disturbs the adhesive strip. Typically, the releasable coatings comprise a polymeric material containing silicone.

The releasable liners are used in many personal care items. For example, many sanitary napkins have an adhesive strip on the back side of the towel (the surface of the towel opposite the body contact surface) to secure the towel to an undergarment and hold the towel in place against the body. Before use, the adhesive strip is protected with a removable peel-off liner. Once it has been removed, the peelable and releasable liner must be disposable. Since the releasable and peelable liners are typically silicone-coated paper, the releasable liners do not easily disperse in water; consequently, the disposal options are limited to depositing the releasable liner in a trash receptacle. Although the disposal of conventional release liners in a toilet will be convenient to the consumer, such waste potentially creates locks in the toilet.

What is required in the art is a releasable and disposable sheet with water discharge, which can be discarded and then discarded with water discharge in a conventional retret. Such releasable liner with water discharge offers convenience to the consumer and does not cause problems such as blockages in the drainage transport process.

SYNTHESIS OF THE INVENTION The present invention is directed to a releasable and disposable water discharging forr comprising a discontinuous and thin releasable coating on at least one surface of a water-sensitive film. The coated water sensitive film functions as conventional release papers currently used. Conventional release papers comprise a peelable coated paper, which covers the adhesive strip on, for example, a feminine sanitary napkin. Unlike conventional release papers, the water-sensitive and coated film of the present invention rapidly loses its integrity and strength when disposed in a conventional toilet or sink. Without the support of the water sensitive film, the discontinuous and thin release coating is easily broken under the force of waste water in a toilet or the flow of water in a sink. The two-layer structure of the disposable release liner with water discharge offers the operation of a paper-based releasable liner with the additional option of disposal in a toilet or sink and at a potentially lower cost.

The present invention is also directed to a method for preparing a disposable release sheet with water discharge. The method comprises coating a discontinuous and thin layer of polymer having release characteristics on a base film, wherein the base film comprises a water-sensitive polymer. When dry, the water-sensitive and coated film exhibits mechanical characteristics comparable to a conventional coated paper liner. The base film itself can be manufactured taking into consideration variables such as film thickness, molecular weight, and mixing additives, to control the similarity function of the plastic film to a coated paper liner. Desirably, the discontinuous coating is present on the film surface in the form of a discrete pattern of dots where the dots are coated on the film by a hot-melt screen printing process. The discontinuous polymer coating controls the release characteristics of the plastic film. The batch coating is formulated to provide very little adhesion to many substrates, particularly pressure sensitive hot melt adhesives, so that the coating can be easily removed from an adhesive strip without disturbing the adhesive strip, while having high adhesion to the water-sensitive substrate. The coating formula ensures that the coated water-sensitive film is peeled off on the surface of the releasable coating, not at the interface between the coating and the water-sensitive base film.

The present invention is also directed to articles containing the disposable release liner with water discharge. Specifically, the releasable disposable water-discharge liners of the present invention are useful in connection with a variety of products, and especially absorbent products such as sanitary napkins, panty liners, diapers, bandages and the like. Although the release liner of the present invention finds particular use in the above-mentioned products, the concept of a disposable release liner with water discharge has a potential for any other application requiring a release material.

The present invention provides a mechanism for eliminating the waste problems associated with various products to the consumer. A detailed non-limiting description of the invention and specific examples of the incorporations are provided below.

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a releasable and disposable water discharging forr comprising a discontinuous and thin releasable coating on at least one surface of a water-sensitive film. As used herein a "releasable liner" refers to a layer which adheres and protects an adhesive on a product, until the product is used, at which time the layer is removed to expose the adhesive. The coated water sensitive film of the present invention functions as conventional release papers currently used. However, unlike conventional release papers, the coated water sensitive film of the present invention is "disposable with water discharge". As used herein, the term "disposable with water discharge" describes a product which rapidly loses integrity and resistance when discarded in a conventional toilet or sink. The water discharge disposable feature of the coated water sensitive film of the present invention comes from the water sensitivity of the base film of the discontinuity of the thin release coating. When they are submerged in water, the uncoated part of the base film becomes easily moistened and weakened. The water-sensitive film quickly loses integrity and resistance when exposed to water. When the substrate layer loses its mechanical integrity, the parts of the discontinuous release coating are easily dispersed under the force of waste with water discharge from the toilet or water flow in the sink.

The coated water sensitive film of the present invention is prepared by any process where a discontinuous and thin layer of the polymer, having the release characteristics, is coated on at least one surface of a water-sensitive film, such as a polyethylene oxide film (PEO). Suitable coating processes include, but are not limited to, solvent-based coating and hot-melt coating. Suitable solvent-based coating techniques include, but are not limited to, spray coating and ink jet printing. Hot-melt coating techniques include, but are not limited to, slotted coating, grid coating, spray coating, swirl coating and gravure coating. Desirably, the coating process is a hot melt coating process. The discontinuous coating is desirably present on the surface of the film in the form of a discrete dot pattern. At least a part of the surface area of the water-sensitive film is left uncoated so that the coated water-sensitive film remains disposable with water discharge. A coating process is described below.

The meltable releasable polymer is delivered from a melt tank through a heated hose to a groove matrix located within a grid cylinder. How it was used here, the term "releasable polymer" describes a polymer which has release characteristics. The temperature of the melt tank, the hose and the grid cylinder may vary depending on the melt rheology of the release polymer in the coating process. The molten polymer is evenly distributed over the inner wall of the rotating grid cylinder, and is then applied through the holes in the grid, as discrete dots, directly onto the water-sensitive film, or alternatively, onto an outdoor carrier substrate. adjacent to the grid cylinder. The grid and the carrier / film substrate can be moved to the same or at different speeds depending on the distortion of the desired dot shape. When the grid and the film / carrier substrate move at the same speed, symmetrical points are produced. When the grid and the film / carrier substrate move at different speeds, elongated points are produced in the machine direction. The lengthening of the points can result in a bridging of some or all of the points. The linear velocity may vary depending on the "open time" of the release polymer. As used herein, the "open time" of the polymer refers to the amount of time required for the polymer to lose its tackiness.

In a transfer coating process, the coated carrier substrate is further moved through the process and brought into contact with the water-sensitive film which is suitably aligned with the coated carrier substrate. The coating is transferred from the carrier substrate to the water-sensitive film under pressure by passing the carrier and film substrate through a pressure point roller. The stitches are scattered as a result of the pressure of the fastening point during the transfer process. The degree of spreading will depend on the pressure, the opening time of the release polymer resin, and the speed of the coating. Desirably, the spreading should minimize the separation between the points without the coalescence of the points. In practice, optimum point spacing was achieved by adjusting the processing factors which include, but are not limited to, the release polymer, the coating temperature, the grid pattern, the resin flow rate, the speed of the grid, the line speed, and the pressure applied to the pressure point roller.

In any direct coating process or transfer coating process, the adhesion of the spots to the water-sensitive film must be greater than the adhesion of the spots to the grid (direct coating) or to the carrier substrate (transfer coating) . The choice of the release polymer must take into consideration the desired adhesion properties of the release polymer. The release polymer must have good adhesion to the water-sensitive substrate. The release polymers suitable for use in the present invention include any processable polymer with an appropriate melt rheology, release characteristics and adhesion properties for application by the hot melt grid coating process described above. Suitable release polymers include, but are not limited to polyolefins, fluoropolymers and silicones.

One or more of the above-mentioned release polymers can be combined to form the discontinuous coating of the water-sensitive film. In addition, the release polymer may contain one or more of the following additives including, but not limited to, compatibilizers, processing aids, plasticizers, glutinizing agents, debglinking agents, slipping agents, and the like. antimicrobial agents, as manufacturing agents or as modifiers depending on the specific properties desired in the coating and the final product. The batch coating must be formulated to provide poor adhesion to a variety of substrates, particularly to pressure-sensitive hot-melt adhesives, so that the coating can be easily removed from a adhesive strip without disturbing the adhesive strip, while having a high adhesion to the water sensitive substrate. The coating formula ensures that the coated water-sensitive film will peel off from the surface of the release coating, not at the interface between the coating and the water-sensitive base film.

Desirably, the release polymer is a polyalphaolefin having a melt viscosity of from about 400 to about 10,000 centipoise at 190 degrees centigrade. Suitable polymers include, but are not limited to, amorphous ethylene-propylene copolymers and ethylene-butylene copolymers. Particularly suitable polymers are manufactured by U.S. Rexene Company under the trade name REXTAC®. The two REXTAC® resins, RT2330 and RT2730, are particularly suitable for the present invention. In a particular embodiment, one or more REXTAC® resins are mixed with a highly branched, low molecular weight polyolefin to reduce the stickiness of the release polymer coating. Desirably, the highly branched polyolefin has an average number-average molecular weight (M, ^) of less than about 2800. A highly branched, particularly low molecular weight polyolefin, VYBAR® 253 (number average molecular weight = 520) is manufactured by Petrolite Corporation The REXTAC® and VYBAR® 253 resin blends provide good results as release coating materials Desirably, the ratio of the REXTAC® resin to VYBAR® 253 is from about 100/0 w / w to about 70/30 w / w more desirably, the ratio of the REXTAC® resin to VYBAR® 253 is from about 98/2 w / w to about 75/25 w / w. More desirably, the ratio of REXTAC® to VYBAR® 253 resin is from about 95/5 weight / weight to about 80/20 weight / weight.The particularly useful mixtures are RT2330 / VYBAR® 253 (95/5 weight / weight) and RT2730 / VYBAR® 253 (80/20 weight / weight).

Desirably, the discontinuous release coating is coated on the water sensitive film in the form of a plurality of dots. The points can have any desired shape. Suitable shapes include but are not limited to circles, squares, rectangles, triangles and hexagons. Desirably, the dot shape allows discontinuous and uniform coverage of the film and minimal spacing between adjacent points. More desirably, the dots are present as essentially discontinuous interenganged shapes of the polymeric release material, resembling pieces of a puzzle, adhered and evenly covering the water sensitive film surface. As used herein, the phrase "essentially discontinuous" describes a coating at which the dots are completely distinct from each other without overlapping the dots, and also a coating wherein some overlap of the dots takes place. As used herein, the term "drawn" describes the relationship of the dots on the film surface so that the exposed surface area of the film is minimized.

The size of the dots and the thickness can vary greatly depending on the final use of the product containing the coated water-sensitive film. Desirably, the dot dimensions should be less than about 100 m for disposable films with water discharge to avoid potential clogging in conventional toilets. The thickness of the point should be minimized when possible to reduce the cost of the product. Desirably, the discontinuous release coating has a coating thickness of less than about 25.4 microns. More desirably, the discontinuous release coating has a coating thickness of less than about 15.2 microns. More desirably, the discontinuous release coating has a coating thickness of less than about 5.1 micrometers. However, the coating must be thick enough to provide a continuous pattern of spots along the surface of the film.

The carrier substrate used in the above described process can be any substrate which can transfer the discontinuous release coating to the water sensitive film. Suitable carrier substrates exhibit little or no adhesion to the release coating in relation to the adhesion between the water sensitive film and the release coating. Suitable carrier substrates include, but are not limited to, release paper, release films, and releasable coated substrates such as films and / or webs. Desirably, the carrier substrate is a release paper. More desirably, the carrier substrate is a high release AKROSIL® paper.

Water sensitive films for use in the present invention include any water sensitive film capable of supporting the coating processes described above.

As used herein, the phrase "water-sensitive film" describes films, which lose integrity over time when in the presence of water and include, but are not limited to, water-soluble films and water-dispersible films. The water sensitive films have sufficient strength and adhesion properties to be used in the processes described above. Suitable polymers include, but are not limited to, polyalkylene oxides, such as polyethylene oxide (PEO) and copolymers of propylene oxide / ethylene oxide, polymethacrylic acid, copolymers of polymethacrylic acid, polyvinyl alcohol, poly (2-) ethyl oxazoline), polyvinyl methyl ether, polyvinyl pylorridone / vinyl acetate copolymers, methyl cellulose, ethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, ethyl hydroxyethyl cellulose, methyl ether starch, poly (n-isopropyl acrylamide), poly N-vinyl caprolactam, polyvinyl methyl oxazolidone, poly (2-isopropyl-2-oxazoline), and poly (2,4-dimethyl-6-triazinyl ethylene).

The water-sensitive film of the present invention can be made completely from a polymeric material sensitive to water or can contain water-sensitive as well as water-insoluble materials as long as the film is dispersed in the water, such as in a sink or in a toilet.

Additionally, water sensitive films can also be made by combining several different types of water sensitive film materials. In some embodiments, it may be desirable to employ one or more additives in the water sensitive film material including, but not limited to, compatibilizers, processing aids, plasticizers, binders, binder, slipping agents, and antimicrobial agents, such as agents. of manufacturing or as modifiers depending on the specific properties desired in the film and in the final product.

Desirably the water-sensitive film of the present invention comprises a polyalkylene oxide film or a polyvinyl alcohol film. More desirably, the water-sensitive film of the present invention comprises a polyethylene oxide film, an ethylene oxide / propylene oxide copolymer film or a polyvinyl alcohol film. More desirably, the water sensitive film of the present invention comprises a polyethylene oxide film or a polyvinyl alcohol film. The polyethylene oxide film is the most desirable film for the transfer coating process, while the polyvinyl alcohol film is the most desirable film for the direct coating process.

The thickness of the water sensitive film can vary greatly depending on the end use of the coated water sensitive film and / or the products containing the coated water sensitive film. The film thickness should be minimized where possible to reduce product costs and to reduce the time necessary for the film to be dispersed, especially in the case of disposable products with water discharge. Desirably, the thickness of the water-sensitive film will be less than about 50.8 microns. More desirably the thickness of the water sensitive film will be from about 2.5 microns to about 35.6 microns. More desirably, the thickness of the water-sensitive film will be from about 2.5 microns to about 12.7 microns, With the release characteristics and the adhesion properties the coated water-sensitive film of the present invention finds applicability in a variety of articles. Specifically, the disposable water release liners of the present invention are useful in relation to a variety of products, and especially in absorbent products such as sanitary napkins, disposable absorbent articles, diapers, bandages and the like. Even when the release liner of the present invention finds particular use in the above-mentioned products, the concept of a disposable release liner with water discharge has potential for any other applications here where the release liner is used.

Those skilled in the art will readily understand that the coated water-sensitive film of the present invention can be advantageously employed in the preparation of a wide variety of products designed to contain at least one component having a release surface. Such products may comprise only the coated water-sensitive film or may comprise a coated water-sensitive film in combination with one or more additional layers such as coatings, films, fabrics, etc. Although the coated water-sensitive film of the present invention is particularly suitable for release liners, the coated water-sensitive film of the present invention can be advantageously employed in the preparation of a wide variety of consumer products other than those of the consumer. release linings.

The present invention is further illustrated by the following examples, which should not be considered in any way as imposing limitations on the scope thereof. On the contrary, it will be clearly understood that it should be sought to have several other additions, modifications and equivalents thereof which after reading the description given here, may suggest themselves to those experts in the art without departing from the spirit of the present invention and / or the scope of the appended claims.

EXAMPLE 1 A release liner was made by the following process. A release coating comprising 100% by weight of coating class polyolefin, REXTAC® RT2330 (U.S. Rexene Company), was coated on top release paper using a 40 mesh grid, and subsequently transferred to a polyethylene oxide film under the following conditions: tank temperature 335 degrees F; grid temperature 345 degrees F; hose temperature 345 degrees F; Matrix temperature 354 degrees F, grid speed 35 feet / minute; and line speed 24 feet per minute. The polyethylene oxide base film of approximately 30.5 micrometers thick was prepared from a combined resin at Planet Polymer (Sa Diego, California). The mixture was applied to the polyethylene oxide film to produce a final coating thickness of about 20.3 microns. The upper line speed facilitated the spreading of the points due to the lower temperature drop before the point of clamping in the pressure. At a line speed of 25 feet per minute, the coalescence of the points began to occur.

The average spacing between the points on the release paper was around 0.2 millimeters. The resulting release liner had an average spacing between the points of about 0.1 millimeters of the polyethylene oxide film. However, the resulting discontinuous coating was sticky due to the nature of the REXTAC® RT2330 resin. ' EXAMPLE 2 A release liner was made as in Example 1 except that the release coating comprises a mixture of 95% by weight of REXTAC® RT2330 resin and 5% by weight of a low molecular weight paraffin wax VYBAR® 253 (Petrolite Polymers ). The release coating was coated on top release paper using a 40 mesh grid, and subsequently transferred to a polyethylene oxide film under the following conditions: tank temperature, 335 degrees F; grid temperature, 345 degrees F; hose temperature, 345 degrees F; matrix temperature, 354 degrees F; grid speed 35 feet / minute; and line speed 24 feet per minute. The polyethylene oxide base film, approximately 30.5 micrometers thick, was prepared from blended resin in Planet Polymer. The mixture was applied to the polyethylene oxide film to produce a final coating thickness of about 20.3 microns. The higher line speed facilitated the spreading of the points due to the lower temperature drop before the pressure point. At a line speed of 25 feet per minute, the coalescence of the points began to occur.

The average spacing between the points on the release paper was around 0.2 millimeters. The resulting release liner had an average spacing between the points around. 0.1 mm of the polyethylene oxide film. The resulting discontinuous coating was significantly less sticky compared to the 100% by weight resin coating of REXTAC® RT2330.

EXAMPLE 3 To further reduce the spacing between the points, a 50 mesh grid, which had less space between the holes, was used to produce a release liner using identical process components and conditions as used in Example 2. The points produced with the grid of 50 meshes they were smaller and did not coalesce. An increased line speed of 25 feet per minute, while the grid speed of 35 feet per minute is maintained, it resulted in some pulling of the points but did not significantly improve in the coalescence of the points. An increase in all temperatures by 10 degrees F showed no difference in point coalescence.

EXAMPLE 4 A release liner was made by the following process. A release coating comprising 100% by weight of a hydrophobic polymer REXTAC® RT2730 (from US Rexene Company), was coated on a high release paper, using a 40 mesh grid, and subsequently transferred to an oxide film. polyethylene under the following conditions: tank temperature 301 degrees F; grid temperature 303 degrees F; hose temperature 309 degrees F; die temperature 312 degrees F; grid speed 35 feet per minute; and line speed 25 feet per minute. The base film of polyethylene oxide, approximately 30.5 micrometers thick, was prepared from the combined resin in Planet Polymer. The coating was applied to the polyethylene oxide film to produce a final coating thickness of about 20.3 microns.

The resulting release liner had an average spacing between the points of about 0.2 millimeters of the polyethylene oxide film. However, the resulting discontinuous coating was sticky due to the nature of the REXTAC® RT2730 resin.

EXAMPLE 5 A release liner was made as in Example 4 except that the release coating comprised a mixture of 80% by weight of a hydrophobic polymer REXTAC® RT2730 and 20% by weight of VYBAR® 253. The release coating was coated on a high release paper using a 40 mesh grid, and subsequently transferred to the polyethylene oxide film under the following conditions: tank temperature 301 degrees F; grid temperature 303 degrees F; hose temperature 309 degrees F; die temperature 312 degrees F; grid speed 35 feet / minute; and line speed 25 feet per minute. Significantly lower processing temperatures were used due to the relatively large weight percentage of VYBAR® 253. The mixture had good spreadability. The points appeared flatter and more coalescence was observed.

The resulting release liner had an average spacing between the points of about 0.1 millimeters of the polyethylene oxide film. The resulting batch coating was significantly less sticky compared to the 100% resin coating by weight of REXTAC® RT2730.

Claims (27)

R E I V I N D I C A C I O N S

1. A disposable water sensitive film with water discharge having releasable characteristics, said water sensitive and disposable film with water discharge comprises: a film sensitive to water; Y an essentially discontinuous release coating of polymeric material on a surface of the water sensitive film, wherein the coating adheres to the water sensitive film and provides release characteristics to the laminate.

2. The water sensitive and disposable film with water discharge as claimed in clause 1 characterized in that the water sensitive film comprises polyethylene oxide, copolymers of propylene oxide / ethylene oxide, polymethacrylic acid, copolymers of polymethacrylic acid, polyvinyl alcohol, poly (2-ethyl oxazoline), polyvinyl methyl ether, polyvinyl pylorridone / vinyl acetate copolymers, methyl cellulose, ethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, ethyl hydroxyethyl cellulose, methyl ether starch, poly (n-isopropyl) acrylamide), poly N-vinyl caprolactam, polyvinyl methyl oxazolidone, poly (2-isopropyl-2-oxazoline), poly (2,4-dimethyl-6-triazinyl ethylene) or a combination thereof.

3. The water-sensitive and disposable water discharge film as claimed in the clause characterized in that the water-sensitive film comprises polyethylene oxide, propylene oxide / ethylene oxide, polyvinyl alcohol or a combination thereof.

4. The water-sensitive and disposable water discharge film as claimed in clause 1 characterized in that the polymeric material comprises a polyolefin, a fluoropolymer, a silicone or a combination thereof.

5. The water-sensitive and disposable film with water discharge as claimed in clause 4 characterized in that the polymeric material comprises a polyalphaolefin having a melt viscosity of from about 400 to about 10,000 centipoise at H.90 degrees centigrade.

6. The water sensitive and disposable film with water discharge as claimed in clause 5 characterized in that the coating further comprises at least one highly branched and low molecular weight polyolefin.

7. The water sensitive and disposable water discharge film as claimed in clause 6 characterized in that the at least one highly branched polyolefin of low molecular weight has a number average molecular weight of less than about 2,800.

8. The water sensitive and disposable film with water discharge as claimed in clause 3 characterized in that the water sensitive film comprises polyethylene oxide.

9. The water sensitive and disposable film with water discharge as claimed in clause 1 characterized in that the essentially discontinuous release coating comprises interenganged shapes of polymeric material having an average spacing between the shapes.

10. The water sensitive and disposable film with water discharge as claimed in clause 8 characterized in that the laminate is a releasable and disposable liner with water discharge.

11. The water sensitive and disposable water discharge film as claimed in clause 1 characterized in that the water sensitive film has a thickness of less than about 50.4 microns and the coating has a thickness of less than about 30.5 microns .

12. A releasable and disposable liner with water discharge comprising: a film sensitive to water; Y an essentially discontinuous release coating of polymeric material on a surface of the water sensitive film, wherein the coating adheres to the water sensitive film and provides release characteristics to the laminate.

13. The releasable and disposable liner with water discharge as claimed in clause 12 characterized in that the water-sensitive film comprises polyethylene oxide, copolymers of propylene oxide / ethylene oxide, polymethacrylic acid, copolymers of polymethacrylic acid, polyvinyl alcohol, poly (2-ethyl oxazoline), polyvinyl methyl ether, polyvinyl pylorridone / vinyl acetate copolymers, methyl cellulose, ethyl cellulose, hydroxypropyl cellulose , hydroxypropyl methyl cellulose, ethyl hydroxyethyl cellulose, methyl ether starch, poly (n-isopropyl acrylamide), poly N-vinyl caprolactam, polyvinyl methyl oxazolidone, poly (2-isopropyl-2-oxazoline), poly (2,4-dimethyl) -6-triazinyl ethylene) or a combination thereof.

14. The releasable and disposable liner with water discharge as claimed in clause 13 characterized in that the water-sensitive film comprises polyethylene oxide, propylene oxide / ethylene oxide, polyvinyl alcohol or a combination thereof.

15. The releasable and disposable liner with water discharge as claimed in clause 12 characterized in that the polymeric material comprises a polyolefin, a fluoropolymer, a silicone or a combination thereof.

16. The releasable and disposable liner with water discharge as claimed in clause 15 characterized in that the polymeric material comprises a polyalphaolefin having a melt viscosity of from about 400 to about 10,000 centipoise at 190 degrees centigrade.

17. The releasable and disposable liner with water discharge as claimed in clause 16 characterized by the coating further comprising at least one highly branched and low molecular weight polyolefin.

18. The releasable and disposable liner with water discharge as claimed in clause 17 characterized in that the at least one highly branched polyolefin of low molecular weight has a number average molecular weight of less than about 2,800.

19. The releasable and disposable liner with water discharge as claimed in clause 14 characterized in that the water-sensitive film comprises polyethylene oxide.

20. The releasable and disposable liner with water discharge as claimed in clause 12, characterized in that the essentially discontinuous release coating comprises interengaged shapes of polymeric material having an average spacing between the shapes.

21. The releasable and disposable liner with water discharge as claimed in clause 12 characterized by the water-sensitive film having a thickness of less than about 50.4 microns and the coating having a thickness of less than about 30.5 microns.

22 A product that includes: a water sensitive and disposable water discharge film having release characteristics, wherein the water sensitive and disposable water discharge film comprises a water sensitive film and an essentially continuous release coating of polymeric material on a water surface. the water sensitive film, wherein the coating adheres to the water sensitive film and provides release characteristics to the film; Y at least one additional layer adhered to the essentially discontinuous release coating of the film.

23. The product as claimed in clause 22 characterized in that the product comprises a disposable absorbent article, a panty liner, an incontinence garment, a bandage or a diaper.

24. The product as claimed in clause 23 characterized in that the product comprises a disposable absorbent article, said disposable absorbent article further comprising a liquid permeable upper sheet and a liquid impermeable lower sheet.

25. A method for making a disposable laminate with water discharge having release characteristics, said method comprising: providing a water sensitive film; Y applying an essentially discontinuous release coating of polymeric material on the surface of the water sensitive film, wherein the coating adheres to the water sensitive film and provides release characteristics to the film.

26. The method as claimed in clause 25 characterized in that the coating comprises at least one polyalphaolefin having a melt viscosity of about 400 to about 10,000 centipoise at 190 degrees centigrade and at least one highly branched polyolefin and low molecular weight.

27. The method as claimed in clause 26 characterized in that at least one highly branched polyolefin of low molecular weight has a number average molecular weight of less than about 2,800. U M N The present invention is directed to a water sensitive and disposable film with water discharge, which maintains its integrity and resistance when in use, but which disperses when placed in contact with water, such as in a toilet or washbasin conventional In addition, the present invention is directed to a releasable and disposable liner with water discharge, which functions like conventional release papers, but adds the convenience of disposal by discharging water in a toilet or in a sink. The present invention is also directed to products, which contain a releasable liner or water-sensitive and disposable film with water discharge.