EP1252221A2 - Antibakterieller mikroporöser film und verfahren zu dessen herstellung - Google Patents

Antibakterieller mikroporöser film und verfahren zu dessen herstellung

Info

Publication number
EP1252221A2
EP1252221A2 EP01900060A EP01900060A EP1252221A2 EP 1252221 A2 EP1252221 A2 EP 1252221A2 EP 01900060 A EP01900060 A EP 01900060A EP 01900060 A EP01900060 A EP 01900060A EP 1252221 A2 EP1252221 A2 EP 1252221A2
Authority
EP
European Patent Office
Prior art keywords
film
poly
inch
ethylene
microporous
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP01900060A
Other languages
English (en)
French (fr)
Inventor
Pai-Chuan Wu
Leopoldo V. Cancio
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Clopay Plastic Products Co Inc
Original Assignee
Clopay Plastic Products Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US09/480,374 external-priority patent/US6656581B2/en
Application filed by Clopay Plastic Products Co Inc filed Critical Clopay Plastic Products Co Inc
Publication of EP1252221A2 publication Critical patent/EP1252221A2/de
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene

Definitions

  • This invention relates to antibacterial microporous films and
  • the film may include
  • PVOH polyvinyl alcohol
  • thermoplastic film having air and moisture vapor permeabilities
  • polypropylene phase is first embossed prior to biaxially drawing
  • the dispersed amorphous phase serves to provide
  • the embossed film is
  • per square inch is equivalent to about 2 to 25 embossed lines per inch.
  • polymer forms a continuous phase and a second polymer forms a
  • the continuous film matrix of a crystallizable polymer may also be
  • inorganic filler such as clay, titanium dioxide, calcium
  • European patent 1 41 592 discloses the use of a polyolefin
  • EVA ethylene vinyl acetate
  • films where the dispersed phase may be a polyethylene filled with calcium
  • the embossing is up to 300 bosses per square inch which is
  • microporous film having a pore size not greater than about 0.2 micron
  • microporosities less than about 0.2 micron.
  • plastic films and breathable microporous films to provide air
  • This invention is directed to antibacterial microporous
  • thermoplastic films and a method for making them.
  • the product can be
  • fpm preferably about 700-1 200 fpm.
  • MVTRs having high MVTRs, i.e., greater than 1 000 gms/m 2 /day, preferably about
  • strip or patch laminates of nonwoven webs with the microporous film are
  • This invention provides an antibacterial microporous film
  • MVTR moisture vapor transmission rate
  • An antibacterial agent may also be added to the composition to be treated with
  • the film has a thickness of about 0.0008 to about 0.002 inch with incrementally stretched areas in
  • smallest pore size is about 0.05 micron and about 80% of the pores range
  • microporous thin thermoplastic film having a microembossed rectangular
  • embossed film about 250 lines per inch are embossed in both the
  • width (CD) and length (MD) of the film are width (CD) and length (MD) of the film.
  • the film-only portion is provided with improved impact
  • the method of this invention involves extrusion of a
  • microporous-formable thermoplastic film into a CD and MD embossing
  • roller nip where the roller is engraved with a rectangular pattern of CD
  • formable thermoplastic composition of the film may comprise a blend of
  • thermoplastic polymer a thermoplastic polymer and a mechanical pore-forming agent such as an
  • the method involves melting a microporous-formable
  • thermoplastic composition and slot-die extruding a web of that
  • composition through a cooling zone into a nip of embossing rollers to form
  • a film at a speed preferably greater than about 700 feet per minute (fpm).
  • a stream of cooling gas (air) is directed at the film during its drawdown
  • the air flow through the cooling zone is substantially parallel
  • cooling gas is enhanced by creating a plurality of vortices of the gas as
  • cooling device is used to create the vortices and make the gas stream
  • the gas stream moves primarily in the same direction as the
  • nonwoven fibrous web is introduced into the nip of embossing rollers with
  • the extruded film and the lamination temperature is controlled by the
  • target bond levels between the plastic film and the plastic film For example, target bond levels between the plastic film and the plastic film.
  • the nonwoven web are achieved at speeds in excess of about 700 fpm
  • Target bond levels of, for example,
  • breathable microembossed films are normally be encountered under such conditions. According to the invention, breathable microembossed films
  • thermoplastic composition made from a microporous-formable thermoplastic composition comprising
  • Antibacterial agents may include
  • Strip and patch breathable laminates are made
  • gas is enhanced by creating a plurality of vortices of the gas as the stream
  • antibacterial thin microporous films with improved properties such as
  • the antibacterial properties are achieved by incrementally
  • the smallest pore size is about 0.05
  • micron and about 80% of the pores range from about 0.05 to about 0.08
  • thermoplastic polymer comprises melt blending a thermoplastic polymer and filler particles to
  • thermoplastic polymer composition A web of the molten
  • thermoplastic composition is extruded from a slot die through a cooling
  • bond strengths when measured at about room temperature.
  • bond strengths when measured at about room temperature.
  • antibacterial microporous thermoplastic film involves melt blending a
  • composition comprising
  • LLDPE density polyethylene
  • LDPE polyethylene
  • melt-blended composition is slot-die extruded as a web
  • the embossing roller has a rectangular engraved pattern of
  • thickness is generally about 0.0008 to 0.002 inch with an embossed
  • the film thickness is about 0.0008 to 0.002 inch. Most preferably, the film thickness
  • the embossed film is made at speeds on the
  • the LLDPE is present in an amount of about 30% to about
  • the polymeric matrix is balanced
  • carbonate particles having an average particle diameter of preferably about
  • composition may include a triblock polymer in an amount of about 0% to
  • HDPE density polyethylene
  • antioxidants/processing aids are used.
  • the method of this invention also involves lamination of the
  • microporous-formable thermoplastic film to a strip or patch of nonwoven
  • the extrusion lamination is conducted at
  • thermoplastic extrudate The compressive force between the fibrous web
  • the laminate may be stretched in both the cross direction
  • thermoplastic polymer for the film preferably is of the
  • polyolefin type and may be any of the class of thermoplastic polyolefin
  • thermoplastic copolymers suitable in the practice of the invention are of
  • the olefin based polymers include the
  • polyethylene polyethylene, polypropylene, and copolymers such as ethylene
  • EVA vinylacetate
  • EMA ethylene methyl acrylate
  • EMA ethylene acrylic
  • suitable for use as films include elastomeric polymers. Suitable
  • elastomeric polymers may also be biodegradable or environmentally
  • Suitable elastomeric polymers for the film include
  • polyurethane poly(ethylene-propylene-diene), ethylene-propylene rubber.
  • This new class of rubber-like polymers may also be employed and they are
  • metallocene polymers or polyolefins generally referred to herein as metallocene polymers or polyolefins
  • styrene and other olefins may be polymerized with butene, hexene,
  • Antibacterial agents suitable for use are 2-alkyl-1 ,2-
  • BIT benzisothiazolin-3-ones
  • 2-(n-hexyl)-BIT 2-(n-hexyl)-BIT
  • pyridines such as 2,3,5,6-tetrachloro-4(methylsulphonyl)-pyridine and
  • phenoxarsines including bisphenox-arsines
  • phenarsazines include phenoxarsines (including bisphenox-arsines), phenarsazines
  • phenoxarsines and phenarsazines include 1 O-chloro-phenoxarsine
  • maleimides are exemplified by N-(2-methylnaphthyl)maleimide.
  • isoindole dicarboximides are exemplified by N-trichloromethylthio
  • phthalimide The halogenated aryl alkanols are exemplified by 2,4-dichlorobenzyl alcohol.
  • An isothiazolinone compound is exemplified
  • Amounts are preferably in the general range
  • microporous-formable film composition can be achieved
  • thermoplastic polymer by formulating a thermoplastic polymer with suitable additives and pore-
  • microporous-formable polymer compositions may be obtained from blends
  • polymers such as a blend of an alkanoyl polymer and polyvinyl alcohol
  • alkanoyl polymer, destructured starch and an ethylene copolymer may be
  • microporous-formable polymer composition as described in U.
  • the nonwoven fibrous web may comprise fibers of
  • polyethylene polyethylene, polypropylene, polyesters, rayon, cellulose, nylon, and
  • nonwoven fibrous webs The fibers are usually staple fibers or continuous
  • nonwoven fibrous web is used in its generic
  • porous and porous, and is composed of staple fibers or continuous filaments.
  • microporous film has a gauge or a thickness between about 0.0008 and
  • webs of the strip or patch laminated sheet normally have a weight of
  • CD cross direction
  • CD stretching may be followed by or
  • microembossed microporous films or laminates may be used in many different applications such as baby diapers, baby training pants,
  • fibrous webs may be stretched with the stretchers and techniques
  • the diagonal intermeshing stretcher consists of a pair of left
  • shafts are disposed between two machine side plates, the lower shaft
  • the slidable members are
  • Micrometers mounted to the side frames are operable
  • Air cylinders are employed to hold the slidable members in
  • cylinders may also be retracted to disengage the upper and lower
  • a drive means is typically utilized to drive the stationery
  • intermeshing teeth is avoided. If the intermeshing rolls are to remain in
  • the upper intermeshing roll typically need not be
  • Drive may be accomplished by the driven intermeshing roll
  • the intermeshing rolls closely resemble fine pitch helical
  • the rolls have 5.935" diameter, 45°
  • the teeth are not designed to transmit
  • the CD intermeshing stretching equipment is identical to the
  • intermeshing elements are capable of large engagement depths, it is
  • a gear resides on each end of this shaft and operates in
  • the drive for the CD intermeshing stretcher must operate
  • the CD intermeshing elements are machined from solid
  • intermeshing element configuration would have a 0.100" pitch.
  • the MD intermeshing stretching equipment is identical to the
  • the MD intermeshing rolls closely resemble fine pitch spur gears.
  • the rolls have a 5.933" diameter
  • stretchers may be employed to produce the incrementally stretched
  • thermoplastic film in one of the unique aspects of this invention a
  • laminate of a nonwoven fibrous web of spun-bonded filaments may be
  • microporous-formable film is incrementally stretched using, for instance,
  • FIG. 1 is a schematic of an inline extrusion lamination
  • FIG. 2 is a cross sectional view taken along the line 2-2 of
  • FIG. 1 illustrating the intermeshing rollers in diagrammatic form.
  • FIG. 3 is a ' graph demonstrating the line speeds for
  • FIG. 4 is a graph demonstrating the moisture vapor
  • FIG. 5 is a graph demonstrating the moisture vapor
  • transmission rate can be adjusted by heating the precursor film.
  • FIG. 6 is a graph demonstrating the impact strengths of the
  • microembossed and flat films which have been incrementally stretched.
  • FIG. 7 is a graph demonstrating the tear strength of the
  • microembossed and flat films which have been incrementally stretched.
  • the antibacterial microembossed film was made with a metal
  • embossing roller having a rectangular engraving of CD and MD lines with
  • engraving depth to produce about 0.0008 inch to 0.002 inch, preferably
  • microembossed pattern provides a matte finish to the film but is
  • the flat film was made with a flat chrome
  • SBS styrene- butadiene-styrene
  • Shell Kraton 21 22X which is an SBS ⁇ 50% by wt. + mineral oil ⁇ 30% by wt.
  • antioxidant/stabilizer ⁇ 1 % by wt. and hydrated amorphous silica ⁇ 1 % by wt.
  • the apparatus may be employed for film extrusion with and
  • Examples 1 -5 were fed from an extruder 1 through slot die 2 to form the
  • thermoplastic film was produced for subsequent incremental stretching to
  • the air knife 3 has a length of about 1 20"
  • the compressive force at the nip and the air knife are controlled such that
  • the film is made without pin holing and without draw resonance in the
  • a and B were maintained at about 400-430°F with die temperatures of
  • FIG. 3 is a graph demonstrating the line speeds for
  • Example 1 which contained only 1 .5% by weight of LDPE, resulted in a poor film gauge control with draw resonance even with
  • FIG. 3 diagrammatically in FIG. 3.
  • FIG. 4 is a graph demonstrating the moisture vapor
  • the temperatures and the depths of engagements can be controlled.
  • the MVTR of the flat film exceeded the MVTR of the
  • embossed film as shown in FIG. 4.
  • MVTRs for the flat film on the order of about 1 900-3200 gms/m /day
  • microporous film can also be controlled by the web temperature during the
  • Fig. 5 shows the film when heated to different temperatures
  • FIG. 5 was for a CD rollers engagement dept of 0.065" and MD rollers
  • MD lines with about 1 65-300 lines per inch. This pattern is disclosed, for
  • This micro pattern provides a matte finish to the film but is
  • compositions reported in the following TABLE 2 were extruded to form
  • microporous films having high MVTRs greater than about 2000
  • gms/m /day for example from about 2000 to 4500 gms/m 2 /day.
  • FIG. 1 diagrammatically in FIG. 1 . As shown, the apparatus may be employed
  • the metal roll is a polished chrome roll. Instead of the
  • ACD air knife, two air cooling devices (ACD), ACD No. 1 and ACD No. 2 are
  • thermoplastic film is produced for
  • in thickness is made at a speed of about 900 fpm, which is taken off at
  • the ACDs have dimensions approximating the web width with
  • nozzle of ACD No. 1 and against the extrudate 6 is about 4000 fpm at the
  • ACD No. 2 is about 6800 fpm at the exit of the nozzle, and the air volume
  • the ACD No. 1 is located about 3.7 inches (95 mm)
  • rubber roll 5 and metal roll 4 is located about 29 inches (736 mm) from
  • MVTRs moisture vapor transmission rates
  • the flat film on the order of about 2000-4500 gms/m 2 /day are achieved.
  • the MVTR of the microporous film can also be controlled by the web
  • Example 2 described above were slot die extruded in accordance with the
  • Example 7 was
  • microembossed microporous film of this invention The microembossed
  • film had a rectangular pattern of 250 lines per inch in both the CD and MD
  • chrome metal roller was used to produce the non-embossed microporous
  • Example 1 2 was made for
  • FIGS. 6 and 7 are graphs demonstrating the impact strengths
  • microembossed and non-embossed microporous films which have
  • Examples 8-1 1 and 1 3-1 6 With reference to Table 3, Examples 1 3-1 6,
  • moisture vapor transmission rate comprising a thermoplastic

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Laminated Bodies (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Ink Jet (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
EP01900060A 2000-01-10 2001-01-03 Antibakterieller mikroporöser film und verfahren zu dessen herstellung Withdrawn EP1252221A2 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US480374 2000-01-10
US09/480,374 US6656581B2 (en) 1998-05-15 2000-01-10 Incrementally stretched non-embossed films having high moisture vapor transmission rates (MVTRs)
US58956800A 2000-06-07 2000-06-07
US589568 2000-06-07
PCT/US2001/000129 WO2001051548A2 (en) 2000-01-10 2001-01-03 Antibacterial microporous film and method of making

Publications (1)

Publication Number Publication Date
EP1252221A2 true EP1252221A2 (de) 2002-10-30

Family

ID=27046565

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01900060A Withdrawn EP1252221A2 (de) 2000-01-10 2001-01-03 Antibakterieller mikroporöser film und verfahren zu dessen herstellung

Country Status (9)

Country Link
EP (1) EP1252221A2 (de)
JP (1) JP2003526710A (de)
AR (1) AR026822A1 (de)
AU (1) AU2301001A (de)
BR (1) BR0107430A (de)
HU (1) HUP0300208A2 (de)
MX (1) MXPA02006718A (de)
PL (1) PL355941A1 (de)
WO (1) WO2001051548A2 (de)

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HUP0400310A2 (en) * 2000-11-22 2004-08-30 Clopay Plastic Prod Co Air and moisture vapor breathable biodegradable films and method of manufacture
DE10207721A1 (de) * 2002-02-20 2003-08-28 Hartmann Paul Ag Scheiben-bzw. pad-förmiger Faserverbundartikel
AR038590A1 (es) * 2002-02-22 2005-01-19 Clopay Plastic Prod Co Hoja laminada de pelicula y metodos para su fabricacion
US7674733B2 (en) * 2002-03-22 2010-03-09 Clopay Plastic Products Company, Inc. Breathable and elastic composite materials and methods
US7442332B2 (en) * 2004-05-04 2008-10-28 Clopay Plastic Products Company, Inc. Method and apparatus for uniformly stretching thermoplastic film and products produced thereby
MX2008016327A (es) * 2006-06-30 2009-01-28 Pliant Corp Laminado elastico estampado, que se puede estirar, y metodo de produccion.
CA2670412C (en) * 2006-11-22 2014-06-03 Pliant Corporation Stretchable elastic laminate having increased cd elongation zones and method of production
PL221352B1 (pl) 2008-01-23 2016-03-31 Inst Włókien Naturalnych Sposób wytwarzania bioaktywnych włókien technicznych
KR101448287B1 (ko) * 2013-02-20 2014-10-22 주식회사 케이엠 통기성과 항균성이 향상된 의료용 시트의 제조방법
CN104327343B (zh) * 2013-07-22 2016-07-06 大禹节水（天津）有限公司 一种滴灌用抗菌滴头的生产方法
US9492332B2 (en) 2014-05-13 2016-11-15 Clopay Plastic Products Company, Inc. Breathable and microporous thin thermoplastic film
WO2017011341A1 (en) * 2015-07-10 2017-01-19 Berry Plastics Corporation Microporous breathable film and method of making the microporous breathable film
MX2018005624A (es) 2015-11-05 2018-09-05 Berry Global Inc Peliculas polimericas y metodos para fabricar peliculas polimericas.
US11472085B2 (en) 2016-02-17 2022-10-18 Berry Plastics Corporation Gas-permeable barrier film and method of making the gas-permeable barrier film
CN108250547A (zh) * 2018-01-23 2018-07-06 宿州市微腾知识产权运营有限公司 一种抑菌交联聚乙烯薄膜的制备方法
CN108929550A (zh) * 2018-08-15 2018-12-04 河南东贵电子科技有限公司 一种植物纤维环保材料及其制备方法
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Also Published As

Publication number Publication date
WO2001051548A3 (en) 2001-12-20
AU2301001A (en) 2001-07-24
PL355941A1 (en) 2004-05-31
HUP0300208A2 (en) 2003-09-29
JP2003526710A (ja) 2003-09-09
AR026822A1 (es) 2003-02-26
MXPA02006718A (es) 2002-09-30
BR0107430A (pt) 2002-10-08
WO2001051548A2 (en) 2001-07-19

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