JPH11510109A - Film with angled capillaries - Google Patents

Abstract

(57) SUMMARY The present invention relates to a thermoplastic film (54) having a first side (59) and a second side (64). The second surface (64) is spaced from the first surface (59). A plurality of perforations (52) penetrate the film (54) from the first side to the second side. The perforations (52) form capillaries (55) extending from the second surface (64). The capillary (55) is disposed at an angle of about 5 degrees to about 60 degrees with respect to a plane perpendicular to the first surface (59).

Description

[Detailed description of the invention] Film with angled capillaries The present invention relates to the general field of perforated plastic films, in particular plus It relates to the perforation of tick films. The present invention particularly relates to perforated plastic films metal screens or molds used for vacuum perforation of plastic films. and a method of manufacturing this screen.

Apertured plastic films have many useful applications. moisture growth of grass and weeds while allowing them to reach the soil below through the film Perforated plastic films are used in horticulture and agriculture to prevent It is

Perforated plastic films impede the permeation of liquids and air or other fluids. It has a plurality of regularly spaced holes that allow it. perforated plastic film is a plurality of regularly spaced It has holes. This film is intended for sanitary clothing applications such as napkins and diapers. or disposable garments such as hospital pads, bed or sleeping bag linings It can be used as a member of A film having desired properties for this composite structure is provided, the outer layer being provided in close proximity to the skin in the composite garment. The garment shall also contain one or more filler layers of absorbent fibrous material. deaf. An example of the use of perforated films to make disposable diapers is U.S. Pat. No. 3 814101.

A specific grade of perforated film is Thompson's US It is disclosed in Japanese Patent No. 3929135. Thompson has a range of dimensions characterized by having a series of regularly spaced small pores in the form of tapered capillaries of An absorbent structure having an apertured film top layer is taught. In the final article, this These holes are directed inwardly so as to be in intimate contact with the absorbent fibrous material layer. but Thus, the smooth side of the apertured film contacts the skin during use. Thompson The film of the garment structure outlined by et al. , The combined effect of the relative lengths of the tapered capillaries and their resistance to backflow as a result of their surface properties. Keeps you dry and comfortable.

One of the earliest methods of vacuum perforating plastic films was described in U.S. Pat. No. 3,054. 148. The patentee wears around its outer surface and A stationary drum having a molded member or screen freely rotatable thereon It describes the system. A vacuum chamber is provided between each side of the thermoplastic sheet to be perforated. A pressure difference is formed to flow the plasticized sheet into the openings provided in the screen. This allows a series of openings, holes or perforations to be made in the plastic sheet or filler. It is used under the screen to form into the room.

One method of making a film with a tapered tube on one side is for Zimmerli. U.S. Pat. No. 3,054,148, issued Sep. 18, 1962. It is In this patent, the heated film is referred to as a perforated screen. and vacuum pressure acting on the underside of the perforated screen. of the film The holes are pulled in the direction of the vacuum pressure below the screen to form tapered capillaries in the film do.

Various types including certain types of perforated screens or rotatable molded members. Methods and apparatus have been developed over the years for specific drilling operations. These examples have U.S. Pat. Nos. 4,155,693; 4,252,516; Nos. 4,151,240, 4,319,868 and 4,388,056. rice No. 4,155,693, the screen is preferably integrally welded. It is formed from a series of perforated metal strips that are bent together to form a cylinder. rice Japanese Patent No. 4252516 discloses a series of holes having an oblong hole centered therein. to provide a screen having hexagonal recesses of U.S. Pat. No. 3,709,647 provides a rotating vacuum forming roll having a circulating coolant therein.

U.S. Pat. No. 4,151,240 discloses filling after drilling and removing bosses. provide a means of cooling the system. U.S. Pat. No. 4,319,868 discloses a perforated chisel. Disclosed is an apparatus for producing a thermoplastic film having raised bosses with a lip. there is Specially structured boss forming rolls have been developed for forming desired film patterns. It is shown. U.S. Pat. No. 4,388,056 discloses a counter-adjusted cylinder Air-laid with contoured side edges and a predetermined basic weight distribution An apparatus for continuously forming a fibrous web is disclosed. The air locating drum extends circumferentially It has a honeycomb annular shaped frame including extending ribs and side plates. tone adjustable stationary airflow conditioning means are circumferentially separated arcs of an annular shaped plenum; Locating the surface of the air placement drum installed near the radially inwardly located boundary Multiple plenum segments are circumferentially spaced to adjust the pressure drop across the area. separate.

Vacuum perforation of thin plastic films is suitable for polyethylene and other plus Extruding a molten polymeric material, such as tick polymer, through a die. including. A heated molten wafer of film or plastic sheet exiting the die drive hits a cylindrical rotating screen mounted on a stationary vacuum drum or roll do. Vacuum rolls are used when a web of plastic is screened or molded. longitudinally along the length of the axial slot and its inner surface below the area that impinges on the material and an extending set of seals. Vacuum pressure from inside the screen is applied to the vacuum roll is directed through the slot of the The vacuum pressure present in the slot is forming or molding a film or sheet into a screen; perforate the sheet through the holes in the At the same time, an airflow is generated that cools the film. be.

A key component of the vacuum processing apparatus is the cylindrical screen. This molded part , the aesthetic, tactile and mechanical properties of films and the geometric patterns of perforated films to form In a preferred screen manufacturing technique, the desired screen pattern The pins are nickel plated on a specially prepared cylindrical mandrel. prescribed or place Cylindrical seamless nickel screens in any desired pattern can be produced. of copper Other metals such as metals can also be used.

Prior art screens, however, float at an angle approximately perpendicular to the surface of the film. A film is formed having perforations through the film. This perforation provides a straight line of sight and and a straight path through the film. Since the collected fluid is visually recognizable Therefore, this feature of prior art films is the reason why the films are used in menstrual or incontinence applications. undesired when used. Therefore, the visually recognizable There is a need for apertured films that have shielding properties that reduce presence.

It is also desirable to have a film that does not provide fluid with a straight path through the film.

The film has a straight path through the film for fluid contacting the surface of the film. It can be used for protective clothing because it is not This property greatly enhances the protective properties of clothing. improve to

DISCLOSURE OF THE INVENTION The present invention is directed to a thermoplastic film having a first side and a second side. The second surface is spaced apart from the first surface. A plurality of perforations extend through the film from the first side to the second side. The perforations form capillaries extending from the second surface. The capillary is positioned at an angle of about 5 degrees to about 60 degrees with respect to a plane perpendicular to the first surface.

BRIEF DESCRIPTION OF THE FIGURES FIG. 1 is a schematic diagram showing the interrelationship of the major components of the apparatus used to carry out the process.

FIG. 2 is an enlarged cross-sectional view showing a segment of the molding surface used in the process;

FIG. 3 is a schematic enlarged cross-sectional view of a prior art apertured film having straight capillaries; .

FIG. 4 is a schematic enlarged cross-sectional view of a prior art apertured film having tapered capillaries;

FIG. 5 is a cross-sectional view of the film forming screen of the present invention;

FIG. 6 is a cross-sectional view of an apertured film produced using the screen of FIG. 5; .

FIG. 7 is a cross-section of an apertured film produced using the screen of FIG. 11 figure.

Figure 8 is a cross-section of an apertured film produced using the screen of Figure 12 figure.

Figure 9 is a cross-section of an apertured film produced using the screen of Figure 10 figure.

FIG. 10 is a cross-sectional view of a film forming screen;

FIG. 11 is a cross-sectional view of a film forming screen;

FIG. 12 is a cross-sectional view of a film forming screen;

FIG. 13 is a cross-sectional view of a fabric containing the apertured film of the present invention;

FIG. 14 is a protective gown using the fabric of FIG. 13;

FIG. 15 is a face mask using the fabric of FIG. 13;

FIG. 16 is a cross-sectional view of an absorbent pad or drape;

FIG. 17 is a cross-sectional view of an absorbent pad or drape;

FIG. 18 is a cross-sectional view of the ground fabric;

FIG. 19 shows a menstrual pad structure using the film of the present invention.

FIG. 20 is a cross-sectional view along line 20--20 of FIG. 19;

FIG. 21 shows a diaper construction using the film of the present invention.

FIG. 22 is a cross-sectional view along line 21--21 of FIG. 21;

BEST MODE FOR CARRYING OUT THE INVENTION Referring to FIG. 1, apparatus for carrying out the process of the present invention comprises a cylindrical rotating drum 10 supported at both ends by a centrally mounted shaft 11; 11 is supported by a stationary shaft support 12 . The cylindrical surface 13 of the drum roll 10 is perforated with numerous holes to allow the passage of air. A molded member or screen 14 is mounted about surface 13 of drum 10 and is rotatable therewith.

The member 14 is an integral unit that can be slid over the drum 10 from its end. Alternatively, this member may be wrapped around the drum 10 and its It may then be fixed to this in a suitable manner. To rotate the drum 10, the drum A gear drive is used which can mesh with teeth provided on the ram member itself. or a cap on its end allows the pulley drive to may be coupled to the ram. As shown in FIG. 1, vacuum chamber 15 is made of a thermoplastic A pressure difference is formed between the surfaces of the sheet, and the plasticized sheet is formed into a molded member 1. It is used to flow into the perforations provided in 4 and perforate the sheet.

Referring to FIGS. 1 and 2, vacuum chamber 15 is located on the axis of drum 10. positioned within the drum 10 along the surface 13 of the drum 10 in contact with the inner portion of the surface 13 thereof. Openings in the surface of the drum over a predetermined portion of the circumference. Two plates 15A are form a member. To effectively seal the leading and trailing edges of chamber 15 , a seal 16 is provided on plate 15A to form a seal against surface 13. be. The seal can be made from metal, HDPE, rubber or other suitable material. be.

Plate 15A is stationary with respect to the direction of rotation of the drum and is or other suitable means, chamber 15 is positioned within drum 10 by Hold a fixed or stationary position. The chamber 15 is thus located around the circumference of the drum 10 Sealed at all points except the directional opening and connected to the chamber in a suitable manner. It can be evacuated or decompressed by an associated pumping system.

As can be seen in FIG. 1, a heated thermoplastic sheet 17 is pressed onto drum 10. An extruder 21 with a die 8 used for extruding the upper side of the drum 10 and located nearby. In effect, the polyolefin material is pressed onto the drum 10. It has been found to work particularly well as a thermoplastic material to be ejected. sheet material 1 As 7 moves downwardly from die 8, the sheet moves down the drum of FIGS. Together with 10, it touches the screen 14 rotating clockwise. rotating screen 1 4 mounts the sheet 17 over the vacuum slot 15, which is made of thermoplastic The material is drawn into the openings in screen 14, thereby perforating. the sheet is , is cooled to change the heated thermoplastic material from a molten state to a solid state, and Apertures are formed in the film. The sheet 17 is placed over the drum 10 in the clock shown in FIG. It continues to move around it in a directional manner and continues to move onto the roll 19 .

Solid sheet material 18 passes from roll 19 over roll 21 and into the corona treatment roll. Continue moving upwards until level 22. Corona treated roll 22 is typically made of epoxy, Fluorinated polyethylene (TEFLON), chlorinated polyethylene (HYPALON) or or coated with a suitable insulating material such as polyester (MYLAR). but , an uncoated processing roll having electrodes coated with an insulating material processes the film can be used for An electrode or corona bar 23 is placed parallel to the processing rolls. of about 1/16 inch above the roll. corona bar 23 , is energized by a transformer and corona treatment power supply 24 . The sheet is passed through the pulling rolls 25 to the second pulling roll 26 and to the take-up roll 27 . unit The rona treatment operation is not required for all film applications, this part of the process is removable. In addition, the film When utilized in a roll-on process end-use application, the film is placed on the take-up roll 27. It is not necessary to wrap the

Other molding processes may be used to form apertured plastic films of the present invention. It should be noted that it is available. Forming screen in the area of the vacuum slot Shown in U.S. Pat. No. 4,878,825 utilizing support for leaning The process works particularly well in forming the apertured films of the present invention.

U.S. Pat. No. 4,839, which utilizes high-pressure fluid flow to perforate plastic films The process shown in the '216 specification can also be used with the present invention. U.S. special The teachings of Hum. expressly incorporated by reference into this patent application as other methods for forming It is rare.

FIGS. 3 and 4 show prior art type holes made with the apparatus shown in FIG. It shows a clear plastic film. This film has the straight line shown in FIG. It has a tapered capillary 3 or a tapered capillary as shown in FIG. Both of these films , the perforations are placed at an angle of approximately 90 degrees to the surface of the film, and the field of view and a straight path through the film.

One of the screens 14 of the present invention utilized to form apertured films. The structure is shown in more detail in FIG. The screen 14 separates the individual sheets 3 It is a laminated structure consisting of 1, 32, 33, 34, 35, 36, and 37 mountains. School The lean 14 has an outer surface 39 positioned in contact with the thermoplastic sheet 17 and a true and an inner surface 40 facing the empty chamber 15 . Sheets are individual sheet thicknesses It contains a plurality of holes 41 passing through the wall. The holes 41 are all of approximately the same geometry. preferably have a shape, but the shape of the holes can be different. should be understood. Sheets are typically photo-etched stainless steel It is a metal material which is coated with a metal material, in this case photo-etching is to create holes 4 in each individual sheet. 1 is formed. Sheets generally have a thickness of from about 1 mil to about 5 mils.

In practice, a sheet having a thickness of about 2 mils has been found to work particularly well. . Typically from about 2 to about 20 sheets are used to form screen 14 .

A preferred range for the number of sheets to form screen 14 is from about 4 to about 10 sheets. It is a route. The effective diameter of the sheet holes 41 is from about 2 mils to about 100 mils. actual Above, a range of about 7 mils to about 60 mils for the effective diameter of holes 41 works particularly well. matter I found out. Sheets of the laminate will form at points of contact when the laminate is subjected to heat and pressure. combined with each other. The laminated structure thus formed is then shaped into a tubular shape. and its free edges are joined together to form a continuous tubular forming structure. be. As shown in FIG. 5, the holes 41 in the laminate structure are not concentrically aligned. ancestor Instead, the holes 41 are circumferentially displaced in the same direction, penetrating through the laminate structure and in places. A passageway 45 is formed which is arranged at an angle. All of the holes 41 shown in FIG. having about the same diameter, each hole displaced from the holes in the adjacent sheet by about 1% to about 50% of the diameter of the hole; However, 5% to 25% of the pore diameter is a preferred range. In practice, about the diameter of the hole A displacement of 10% has been found to work particularly well. As a result, passage 45 is , about 5 degrees with respect to a plane or line 47 extending perpendicular to the outer surface 39 of the screen 14 to They are arranged at an angle of about 60 degrees. This angle is generally the angle degree A.

The sheet holes 41 are generally circular in shape and penetrate through the laminate screen 14 . A passageway 45 formed therethrough is generally cylindrical in shape. However, the shape of the hole , can vary, and ellipses, oblongs and other shapes are available , rectangles, squares, hexagons or pentagons can be used for the openings.

As shown in FIG. 10, a screen 14' is provided in each adjacent sheet of the laminate. It has progressively smaller holes 41'. In this screen structure, formation The passageways 45' that are formed converge as they progress through the screen 14'.

In this particular construction, each hole 41' has its diameter selected from the holes in adjacent sheets. are displaced by the same percentage. As a result, the passageway 45' passes through the screen 14'. It converges continuously and uniformly as it advances.

The screen 14'' shown in FIG. 11, like the holes shown in FIG. However, in FIG. 11, the screen The 14" holes 41" are opened as the passages 45" advance through the screen 14". are displaced so that they converge in one direction.

As shown in FIG. 12, screen 14''' defines passageway 45'''. , has a composite curve for this passage. In this embodiment the screen 14 A portion of the sheet forming ''' is displaced in one direction to form a first passageway 45'''. forming a portion 51; A plurality of sheets are displaced in opposite directions to form a second portion 53 of the passageway 45'''. be. Normally all holes 41''' are of the same diameter and on each layer of screen 14''' Displaced at equal intervals. However, the holes 41''' are resizable. Yes, and the amount of displacement can be varied to form the converging passage 45'''. through A first portion 51 of channel 45''' extends perpendicularly to outer surface 39''' of screen 14'''. positioned at an angle A that is between about 5 degrees and about 60 degrees with respect to an extending line or plane 47'. there is The second portion 53 forms an angle B with respect to the plane or line 47 that is between about 5 degrees and about 60 degrees. are placed in

FIG. 6 shows a section of film 54 formed using the screen shown in FIG. showing the face. Film 54 has a first side 59 and a second side 64 . fill The first and second surfaces of the frame are generally arranged in a substantially parallel relationship. This film , has a plurality of perforations 52 forming capillaries 55 of the film. Capillary tube 55 is from about 5 degrees to about a plane 47 having a substantially uniform diameter and perpendicular It is displaced by an angle A which is 60 degrees. Capillary tube 55 is generally cylindrical in shape and has side walls 62 forming a passageway 65, a first opening 58 in the surface 59 of the film 54 and a first opening 58 in the film 54; a second opening 60 in the end 57 of the capillary 55 spaced from the first surface 59 of the film 54; are doing. End 57 of capillary tube 55 is typically about 0.005 inch to about 0.05 inch. is separated from surface 59 of film 54 by a distance of about 0.007 inch to about 0.007 inch. . A spacing of 0.25 inches is preferred. Both aperture 58 and aperture 60 are centered. or has a geometric center, and the center point of aperture 58 is displaced from the center point of aperture 60. there is The center point of aperture 60 is about 5% to about 200% of the diameter of aperture 60, a preferred range. from the center point of aperture 58 by a distance that is between about 75% and about 125% of the diameter of aperture 60. Displaced. As can be seen in FIG. It has a plurality of steps or protrusions 56 formed from the set sheet. the film The projections 56 of 54 are sharpened by offset sheets forming the screen 14. Instead of the corners of the corners, they are nearly rounded.

FIG. 9 shows a film 54' formed using the screen shown in FIG. shows a cross section of This film 54' has passages 65' extending into the first surface 5 of the film. 9', the points at which side walls 62' and respective capillaries 55' and passages 65' converge. Except for this, it is almost the same as the film shown in FIG.

FIG. 7 is a cross-section of a film 54'' produced utilizing the screen of FIG. 11. is shown. In this film, the side walls 62'' of the capillaries 55'' and the passages 65'' are , passageway 65'' advances away from the surface of the film and, in particular, unidirectionally converges when it converges on the side.

FIG. 8 shows a film 54' formed using the screen shown in FIG. '' shows a cross section. In this view, capillaries 55''' and passages 65''' , with respect to a plane 47 arranged perpendicular to the first surface 59''' of the film having a first portion 61 arranged at A and a second portion 63 arranged at an angle B; The angle is about 5 degrees to about 60 degrees with respect to plane 47 . In FIG. 8, capillary tube 55 ''' is generally when advancing from the first side 59''' of film 54''' converge to . However, capillaries 55''' can have walls that do not converge. One thing should be understood.

All of the above films had a line of sight through the aperture and perpendicular to the surface of the film. It has capillaries placed at angles that act as a hindrance. Therefore Phil The film passes through the film such as when the capillaries are perpendicular to the first surface 59 of the film. Possess shielding properties so that fluids reaching the absorbent structure are not visible to the user. would do. This is particularly important for menstrual or incontinence applications. centre The degree of shielding provided by the film depends on the angle and length of the capillary of the film and the capillary is directly proportional to the extent to which the shape of This film has a defect passing through the film. It is also effective in preventing undesired straight fluid flow. The capillaries are arranged at an angle so that the fluid impinging on the surface of the film has a straight path through the film. not present. Instead, the fluid must change direction as it passes through the capillary.

This film is used for protective clothing when fluids come into direct contact with the surface of the protective clothing. can be used. The films of the present invention allow fluid to splatter straight through the capillaries. reduce the chance of slipping and greatly increase the protective capacity of the garment.

Figure 13 shows a layered textile material utilizing the film of the present invention. layered weave Article material 70 has a lightweight breathable outer layer 73 . Outer layer 73 is typically non- Paper cover stock is always lightweight and highly breathable. Next is breathable, but this A nonwoven material 75 that resists the passage of fluids through the layer. In particular, nonwoven materials Provides excellent resistance to fluid flow on contact. meltblown polypropylene , Polyethylene or polyester should be used to ensure that these materials have an acceptable level of fluid resistance. Since it has , it can be used for nonwoven layers. The next layer of fabric 70 is a plurality of is a thermoplastic film 79 having perforations 81 of .theta. 3 and an angle of about 5 degrees to about 60 degrees to a plane perpendicular to the surface 85 of the film. are placed in The thermoplastic film 79 has capillaries 83 extending into the nonwoven material. It is positioned so as to contact the nonwoven material of the lever. capillaries 8 formed by perforations 81 3 allows the film 79 to be breathable, allowing straight flow of liquid through the film. to resist. The film 79 is substantially similar to the film 54 shown in FIG. Although shown, films similar to those shown in FIGS. 7, 8 and 9 It should be understood that the film can also be used for the film 79 of the layered fabric material 70. It is The next layer of layered fabric 70 is placed near surface 85 of film 79. This is the second layer of nonwoven material 87 . The second layer of nonwoven material 87 is used by the user of the woven material 70 It is considered to be the layer that contacts the skin. When the textile material comes in contact with the user's skin If not possible, the second layer of nonwoven material 87 can be omitted.

The purpose of the woven material 70 is to have excellent resistance to fluid, especially liquid, penetration. It is to provide a breathable structure that The fabric 70 is designed so that the fluid is splashed or Applications where the material is sprayed and provides resistance to the straight path of fluid through the film It is considered to be used in examples. This textile can be used in the medical field, hazardous waste field, or , others concerned with people being protected from flowing or sprayed fluids can be used in the field of

14 shows a protective gown 89 and FIG. 15 uses a layered fabric material 70. 9 shows a protective face mask 91 that can be manufactured by For protective gown 89, no A second layer of woven material 87 is used to prevent the inner surface of the gown from contacting the wearer's skin. is removable when worn on fabric. protective gown 89 and face mask In both cases 91, the streamed or sprayed fluid contacts the outer layer 73 of fabric. do. The fluid permeates through the nonwoven material 75 which provides resistance to fluid permeation. fluid then contacts thermoplastic film 79 with angled capillaries 83 . fluid engages the thermoplastic film 79, there is no straight path through the film and the flow Body speed is greatly reduced. The structure of the layered fabric 70 prevents a straight path of fluid. It provides a much higher level of protection than any known and currently available breathable material.

FIG. 16 illustrates the thermoplastic foam of the present invention in an absorbent pad or drape 88. shows the use of films. In this construction, the film 79 is the absorbent material 93 is placed on the layer of Film 79 is absorbed by capillaries 83 formed by perforations 81 . It is placed in contact with the storage material 93 . For this construction, the capillaries 83 are made of a thermoplastic It acts to channel any fluid present on the surface 85 of the elastic film 79 to the absorbent material 93 . hair The angle of tube 83 is a straight line into absorbent material 93 along a line perpendicular to the surface of the film. Fluid encased in the sight-inhibiting, absorbent material 93 is In fact, it is not easily visible.

Figure 17 shows a pad or drape 9 that can be made using the film of the present invention. 0 shows another embodiment. The film 79 has a surface 85 of absorbent material 93 . placed in contact with the layer. Film 79 has capillaries 83 formed by perforations 81 extends away from the absorbent material 93 . away from absorbent material 93 In the case of capillaries 83 extending in the direction of The resistance to penetration of the liquid underneath is greater.

FIG. 18 shows the use of a thermoplastic film 79 as the ground fabric 94. . In this application the film is arranged with the capillaries 83 extending towards the ground 95. and the film is placed on the ground. Perforations 81 and capillaries 83 are exposed to moisture such as rain. , to reach the ground 95 through the film. However, the angled capillaries 83 Effectively eliminates or minimizes the amount of light that can be transmitted through film 79 . this prevent weed growth and other unwanted growth in areas where the film is placed. be. However, rainwater can permeate the film, making it difficult to dispose of or store rainwater. no. In applications where additional strength is required, the nonwoven material 97 may be used for added strength. For this purpose, it can be laminated to surface 85 of film 79 . The non-woven material 97 is the ground fabric 94 It is also understood that the opposite side of the film 79 can be laminated to increase the strength of the film. should.

Figures 19 and 20 illustrate a menstrual or menstrual cycle configurable using the film of the present invention. indicates a feminine sanitary pad. The pad 105 is placed on the absorbent core 107. It has a layer of perforated thermoplastic film 79 which is coated. Film 79 is a film The ends of the capillaries 83 extending from the tube are placed in contact with the absorbent core 107 . suction The absorbent core comprises one or more layers of nonwoven material 109 and superabsorbent padding or gel material. charges 111. A non-permeable thermoplastic film 113 It is located on the side of the absorbent core 107 opposite the rim 79 .

Figures 21 and 22 illustrate diapers that can be constructed using the film of the present invention. Item 115 is shown. The diaper 115 is a perforated absorbent core 117 positioned over the absorbent core 117 . of thermoplastic film 79 . Film 79 extends from the film. The end of the capillary tube 83 is placed in contact with the absorbent core 117 . This absorbent core includes one or more layers of nonwoven material 119 and superabsorbent padding or gel material 12 1 and . Non-permeable thermoplastic film 123 is film 79 is located on the side of the absorbent core 117 opposite to the .

A film layer 79, shown in FIGS. 19-22, is retained within the absorbent core material previously described. It should be noted that shielding the applied fluid.

Films similar to those shown in FIGS. - Can be used as the film 79 also in the application example shown in FIG. should be understood.

The foregoing description of the invention has been presented for purposes of illustration and may be modified and modified in addition to those set forth above. and substitutions can be made without departing from the scope of the following claims.

[Written amendment] Patent Act Article 184-8(1)

[Date of Submission] December 20, 1996

[Correction details] The scope of the claims 1. A thermoplastic film (54) comprising: a first surface (59); a second surface (64) spaced from said first surface (59); a plurality of perforations (52) through said film, said perforations (52) comprising: forming an angled capillary (55) extending from said second surface (64), said angled bristle The tube (55) is angled from about 5 degrees to about 6 degrees with respect to a plane (47) perpendicular to said first surface (59). oriented at an angle of 0 degrees and when viewed along said plane (47) said perforations (5 2) A film (54) preventing direct viewing through. 2. Said capillaries (55) are about 0.5 mm from the first side (59) of said film (54). 005 inches to about 0.050 inches apart. The film (54) of Claim 1. 3. Said capillary (55) is generally cylindrical in shape and forms a side wall (66). A film (54) according to Item 1. 4. Side walls (66', 66'', 66' of said capillaries (55', 55'', 55''') ''') converge as the capillaries extend from the film. film (54', 54'', 54'''). 5. 5. The method of claim 4, wherein the side walls (66'') of the capillaries (55'') converge in one direction. film (54″). 6. Said perforations (52) comprise a first opening (58) in said first surface (59) and said first A second opening (60) in the end (57) of said capillary (55), spaced from one face (59) ), wherein said first and second openings (58, 60) are substantially circular, and said first 2. The method of claim 1, wherein the first opening (58) and the second opening (60) each have a center point. film (54). 7. The center point of said first opening (58) is displaced from the center point of said second opening (60). A film (54) according to claim 6, characterized in that 8. From the center point of the first opening (58), the center point of the second opening (60) is: Said first opening (58) is displaced by a distance of between about 5% and about 200% of its diameter. A film (54) according to claim 7. 9. From the center point of the first opening (58), the center point of the second opening (60) is: displaced by a distance of about 75% to about 125% of the diameter of said first opening (58) A film (54) according to claim 7. 10. Said capillaries (55''') are arranged perpendicular to said first surface (59'''). said first surface (59') at an angle (A) of about 5 degrees to about 60 degrees with respect to the plane (47) '') and about 5 degrees to said plane (47). a second portion (63) of said capillary (55''') arranged at an angle (B) of about 60 degrees; and this second part (63''') is opposite to said first part (61''') A film (54''') according to claim 1 disposed. 11. Said capillaries (55''') are arranged in first openings (5) in said first surface (59'''). 8''') and said bristles spaced from said first side (59''') of said film. and a second opening (60''') in the end (57) of the tube (55'''). 10 (54'''). 12. 2. The thermoplastic film of claim 1, wherein the thermoplastic film is a polyolefin film. film (54). 13. A thermoplastic film (79) having a plurality of perforations (81), said perforations The holes form angled capillaries (83) extending from the first surface (85) of said film. , said angled capillaries (83) are oriented perpendicular to said first surface (85) of said film; positioned at an angle of about 5 degrees to about 60 degrees with respect to a plane (47) on which said plane (47) rests; 47), a thermoplastic foil preventing direct viewing through said perforations (81). Wilm (79) and positioned near the second surface of said film (79) from which said capillaries (83) extend; With the absorbent material (117) placed thereon, said perforations (81) and angled capillaries (83) ) allows fluid to pass through the film (79) and into the absorbent material. and said angled capillaries (83) allow the flow retained within said absorbent material (117) to a body of said thermoplastic film (79) spaced from said absorbent material (117); an absorbent material positioned substantially invisible when looking at said first side (85); fee (117); on a thermoplastic film (123) placed near said absorbent material (117) and the absorbent material (1 17) a diaper (115) having a thermoplastic film (123) disposed on the side of the ). 14. A thermoplastic film (79) having a plurality of perforations (81), said perforations Holes (81) form angled capillaries (83) extending from said film, said angled capillaries (83) The capillaries (83) are arranged in a plane ( 47) at an angle of about 5 degrees to about 60 degrees and along said plane (47) a thermoplastic film (79) which, when viewed, prevents direct viewing through said perforations (81); and, Absorbent material (107) placed near said film (79) to The absorptive material is a second surface of said film (79) from which said capillaries (83) extend. and said perforations (81) and angled capillaries (83) allow fluid to pass through said allowing it to reach through the film (79) and into said absorbent material (107); Angled capillaries (83) allow fluid retained within said absorbent material (107) to A first side of said thermoplastic film (79) remote from said absorbent material (107) ( 85), the absorbent material (107) being positioned so as to be substantially invisible when viewed and, on a thermoplastic film (113) placed near said absorbent material (107) Then, the thermoplastic film (113) is the perforated thermoplastic film (79 ) on the side of said absorbent material (107) remote from the (113).

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Claims (1)

[Claims]   1. A thermoplastic film (54),   A first surface (59);   A second surface (64) spaced from the first surface (59);   A plurality of perforations (52) penetrating the film, wherein the perforations (52) A capillary (55) extending from the second surface (64) is formed, wherein the capillary (55) is It is arranged at an angle of about 5 degrees to about 60 degrees with respect to a plane (47) perpendicular to the first plane (59). Film (54).   2. The capillary (55) extends approximately 0,0 mm from the first side (59) of the film (54). Having ends (57) separated by a distance of from 005 inches to about 0.050 inches. The film (54) according to claim 1, wherein   3. The capillary (55) is substantially cylindrical in shape and forms a side wall (66). Item (54).   4. The side walls (66 ', 66 ", 66) of the capillaries (55', 55", 55 "'). '') Converge as the capillary extends from the film. Film (54 ', 54 ", 54'").   5. The side wall (66 ") of the capillary (55") converges in one direction. On the film (54 ").   6. The perforation (52) includes a first opening (58) in the first surface (59) and the first opening (58). A second opening (60) at the end (57) of said capillary (55), spaced from one surface (59); ), Wherein the first and second openings (58, 60) are substantially circular and centered. The film (54) of claim 1 having points.   7. The center point of the first opening (58) changes from the center point of the second opening (60). The film (54) of claim 6, wherein the film (54) is positioned.   8. The center point of the second opening (60) is from the center point of the first opening (58). The first opening (58) is displaced by a distance of about 5% to about 200% of the diameter. A film (54) according to claim 7.   9. The center point of the second opening (60) is from the center point of the first opening (58). Being displaced by a distance of about 75% to about 125% of the diameter of the first opening (58). The film (54) according to claim 7, wherein   10. The capillary (55 ") is arranged perpendicular to the first surface (59"). The first surface (59 ') at an angle (A) of about 5 degrees to about 60 degrees with respect to the inclined plane (47). ″) And a first part (61 ′ ″) extending from about 5 degrees with respect to the plane (47). A second part (63) of said capillary (55 ") arranged at an angle (B) of about 60 degrees; The second part (63 ") is oriented in the opposite direction to the first part (61"). A film (54 "") according to claim 1, wherein the film (54 "") is disposed.   11. The capillary (55 ") is connected to the first opening (5") of the first surface (59 ""). 8 '' ') and the hairs spaced from the first surface (59' '') of the film. 11. The method as claimed in claim 10, wherein a second opening (60 ") at the end of the tube (55") is formed. On the film (54 "").   12. The method according to claim 1, wherein the thermoplastic film is a polyolefin film. On film (54).   13. Forming a thermoplastic film (79) having a plurality of perforations (81); The holes form capillaries (83) extending from the film, wherein the capillaries (83) are About 5 degrees to a plane (47) arranged perpendicular to said plane (85) of the film. A thermoplastic film (79) arranged at an angle of about 60 degrees;   The capillary (83) is disposed near the side of the film (79) extending therefrom. With the placed absorbent material (117), the perforations (81) and capillaries (83) are Allowing the body to reach through the film (79) and into the absorbent material; The angled capillaries (83) allow the fluid held in the absorbent material (117) to Looking at the side of the thermoplastic film spaced from the absorbent material (117) An absorbent material (117) arranged so as to be almost invisible;   A thermoplastic film (123) located near said absorbent material (117); And removing said absorbent material (117) separated from said perforated thermoplastic film. A diaper (115) having a thermoplastic film (123) disposed on the side.   14． Forming a thermoplastic film (79) having a plurality of perforations (81); The holes form capillaries (83) extending from the film, wherein the capillaries (83) are About 5 degrees to about a plane (47) arranged perpendicular to said plane (85) of the film. A thermoplastic film (79) arranged at an angle of 60 degrees;   The absorbent material (107) is disposed near the film (79). The collecting material is provided on the side of the film (79) from which the capillary (83) extends. And the perforations (81) and capillaries (83) allow fluid to flow through the film. (79) allowing to reach into the absorbent material (107), the angled Capillaries (83) allow the fluid held in the absorbent material to contain the fluid (10). 7) When looking at the side of the thermoplastic film (79) remote from the An absorbent material (107) arranged so as not to be   A thermoplastic film (113) located near the absorbent material (107); Then, the thermoplastic film (113) is made of the perforated thermoplastic film (79). A) a thermoplastic filler disposed on the side of said absorbent material (107) remote from A menstrual product (105) comprising: