WO2015050452A1 - Procédé de fabrication d'un film à base de polymères haute performance - Google Patents

Procédé de fabrication d'un film à base de polymères haute performance Download PDF

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Publication number
WO2015050452A1
WO2015050452A1 PCT/NL2014/050686 NL2014050686W WO2015050452A1 WO 2015050452 A1 WO2015050452 A1 WO 2015050452A1 NL 2014050686 W NL2014050686 W NL 2014050686W WO 2015050452 A1 WO2015050452 A1 WO 2015050452A1
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WO
WIPO (PCT)
Prior art keywords
high performance
performance polymers
sheet
film
sensitive adhesive
Prior art date
Application number
PCT/NL2014/050686
Other languages
English (en)
Inventor
Bart Clemens Kranz
Original Assignee
Olympic Tape B.V.
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 NL2011548A external-priority patent/NL2011548C2/en
Application filed by Olympic Tape B.V. filed Critical Olympic Tape B.V.
Publication of WO2015050452A1 publication Critical patent/WO2015050452A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/08—Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, and with or without non-reinforced layers
    • B29C70/086—Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, and with or without non-reinforced layers and with one or more layers of pure plastics material, e.g. foam layers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/22—Plastics; Metallised plastics
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/29—Laminated material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
    • B29C55/06—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with the direction of feed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0658—PE, i.e. polyethylene characterised by its molecular weight
    • B29K2023/0683—UHMWPE, i.e. ultra high molecular weight polyethylene
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
    • C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2423/00—Presence of polyolefin
    • C09J2423/04—Presence of homo or copolymers of ethene
    • C09J2423/046—Presence of homo or copolymers of ethene in the substrate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2423/00—Presence of polyolefin
    • C09J2423/10—Presence of homo or copolymers of propene
    • C09J2423/106—Presence of homo or copolymers of propene in the substrate

Definitions

  • the invention pertains to a method for manufacturing a film of high performance polymers and in particular polymers in the form of fibers and sheets.
  • High performance polymer fibres and sheets are characterized by their high tensile strength which is typically > 1 GPa and tensile modules of at least 40 GPa.
  • high performance fibres are polyolefins like ultra-high molecular weight polyethylene (UHMWPE) fibres such as Dyneema and Spectra or highly drawn polyethylene or polypropylene fibres, para-aramide fibres such as Twaron and Kevlar, poly(p-phenyle-2,6-benzobisoxazole) (PBO) fibre such as Zylon, carbon fibres such as Torayca and highly drawn nylon fibres.
  • UHMWPE ultra-high molecular weight polyethylene
  • PBO poly(p-phenyle-2,6-benzobisoxazole)
  • Zylon poly(p-phenyle-2,6-benzobisoxazole)
  • carbon fibres such as Torayca and highly drawn nylon fibres.
  • An example of high performance polymer sheet is Endumax and Dyne
  • US 5,756,660 describes polymerisation of UHMWPE over a specific catalyst, followed by compression moulding, rolling and stretching to form a polymer film.
  • US 5, 106,555 describes a method for compression molding / stretching of UHMWPE.
  • US 5,503,791 describes a polyethylene film manufactured by extruding a solution of a polyolefin in a first solvent, followed by cooling, the removal of the solvent and stretching of the film.
  • US 5, 106,558 describes a method for the continuous preparation of a polyethylene having high strength and high modulus.
  • International application WO2009025671 relates to a pressure- sensitive tape comprising a backing, a layer of corrosion-resistant filaments on one surface of the backing, and pressure-sensitive adhesive layer that coats the filaments and binds them to the backing, wherein the filaments are selected from the group consisting of E-CR filament, AR glass filament, S glass filament, E glass filament, LCP filament, aramid filament, U HMW polyethylene or polypropylene filaments, carbon filament, coated filament, and combinations thereof.
  • a release coating or liner is used to produce a self- wound product in the case of a pressure sensitive tape.
  • JP2007291705 relates to a fiber reinforced resin board with an adhesive, comprising an adhesive layer and a release sheet layer at least on a single side of a board-like fiber reinforced resin in this order beginning from the fiber reinforced resin.
  • the release sheet layer arranged on the adhesive layer of the fiber reinforced resin board is released and the fiber reinforced resin board is stuck to the structure to be reinforced.
  • US 7,470,459 relates to a ballistic panel comprising a laminated structure of a plurality of highly oriented ultra high molecular weight polyethylene slit film, sheets or tapes.
  • a composite sheet comprises a sheet of UHMWPE material having a layer of a sheet adhesive laminated thereto, for example a layer of high density polyethylene and exhibiting a melting point lower than that of the UHMWPE.
  • High performance polymer fibres and sheets are based on highly oriented polymer molecules which are made by drawing a polymer of a specific form and shape into an elongated element.
  • Draw ratios or stretch ratios i.e. final length after drawing divided by the original length before drawing
  • Draw ratios or stretch ratios can be over 50.
  • fibres can be wrapped into bundles, which can be used as ropes or fishing lines. It is also possible to weave fibres into yarn, which can be processed to make anti-ballistic panels or sails. These processes are well known from the conventional textile industry.
  • the disadvantage is that a woven fabric is relatively thick with a relatively large empty volume, which does not contain high performance materials, between the fibres. Also the inter fibres connection is obtained by using the relatively expensive fibres themselves. And due to the different weaving directions the performance/weight ratio in one direction is relatively low.
  • high performance fibres are used in a unidirectional (UD) alignment. This means that the majority of the fibres are aligned in the same direction. In general it can be said that for a UD alignment, at minimum 75-90% of the fibres should be aligned in the same direction and preferably all of the fibres should be aligned in the same direction.
  • UD aligned laminates are almost always stacked where they are alternated in 0-90 degrees and under heat and pressure formed into a plate or simple 3D objects. UD fabrics have the advantages that a minimum of (expensive) high performance fibres can be used to get the required mechanical properties in a certain direction.
  • Fibrillation is (partial) detachment of fibres from an article made from high performance polymer fibres.
  • a similar problem, which also referred to as fibrillation, is known for sheets of high performance polymers, where (partial) detachment of (very) (small) strands of sheet can occur.
  • a sheet of high performance polymers has similar properties as UD aligned high performance fibres since also in said sheets the polymer molecules are UD aligned.
  • Each of these solutions uses a bonding material which has a melting temperature that is lower than the melting temperature of the fibres or sheet. Basically this bonding material is applied on/between the fibres or sheets. The stack of fibres or sheets and the bonding material is heated up, under pressure, to a point where the bonding material liquefies, but the fibres or sheets do not. Examples of prior art where this concept is used is WO2008/040510. This document teaches how UD directionally aligned polymeric sheets (being referred to as a tape), are connected together by using a binding yarn which has a melting temperature which lower than the melting temperature of the sheets.
  • thermosetting resin Another method processing UD aligned high performance polymer fibres and sheets, but also yarn or chopped fibres is to apply a thermosetting resin to the high performance polymers.
  • This is known as pre-impregnated fibres or prepregs.
  • Prepregs are widely known and used in multiple industries and can be processed relatively easily and in many shapes.
  • the disadvantage is that a relatively large amount of thermosetting resin, and thus non high performance material, is used. This dilutes the performance/weight ratio of the high performance materials significantly.
  • the resins which are used mainly epoxy and polyester
  • the present invention aims, inter alia, to provide a method for manufacturing a film of high performance polymers.
  • the present invention relates to a method for manufacturing a film of high performance polymers, the method comprising the steps of:
  • step a) comprises the following steps:
  • step a) comprises the following steps:
  • the present invention furthermore relates to a method for manufacturing a film of high performance polymers, the method comprising the steps of:
  • the bonding layer according to step ii) comprises at least two layers, wherein one of said at least two layers melts during step iv), wherein said melting layer abuts to said sheet of oriented integrated high performance polymers. This melting of one of said at least two layers will provide a strong adherence.
  • the step iii) of applying a pressure sensitive adhesive further comprises applying a carrier layer provided with a layer of said pressure sensitive adhesive, wherein the carrier layer is preferably a release layer.
  • the step iii) of applying a pressure sensitive adhesive further comprises applying a solvent comprising said pressure sensitive adhesive and removing said solvent.
  • the method further comprises a step v), wherein step v) comprises winding said oriented integrated high performance polymers provided with pressure sensitive adhesive and bonding layer for forming a roll.
  • the film according to the invention enables a good adherence a layer of high performance polymers to a secondary object without using heat and/or pressure and decreases fibrillation of the UD aligned high performance fibres and sheets.
  • An oriented integrated high performance polymers sheet which is made by providing high performance polymers in particulate form, compacting the high performance polymers for forming a sheet of integrated high performance polymers and stretching the sheet of integrated high performance polymers for forming a sheet of oriented integrated high performance polymers is preferably based on ultra-high molecular weight polyethylene (UHMWPE).
  • Said sheet of oriented integrated high performance polymers has preferably a tensile strength of at least 1 .0 GPa, tensile modules of at least 40 GPa, an Mw of at least 500.000, and a sheet width of at least 2 mm.
  • An example of said sheet is Endumax ® or Dyneema® tape.
  • a bonding layer is be applied to the film of high performance polymers.
  • Said bonding layer could prevent fibrillation of the sheet of oriented integrated high performance polymers and provide lateral- and axial-bonding.
  • the bonding layer is preferably made from a thermoplastic material and can for example be made from ethylene vinyl acetate copolymer (EVA), linear low density polyethylene (LLDPE), high density polyethylene (H DPE), low density polyethylene (LDPE), ethylene alkyl acrylate copolymer (EAA), ethylene butyl acrylate copolymer (EBA), ethylene methyl acrylate copolymer (EMA), poly(propylene) (PP) or polyvinyl alcohol).
  • EVA ethylene vinyl acetate copolymer
  • LLDPE linear low density polyethylene
  • H DPE high density polyethylene
  • LDPE low density polyethylene
  • EAA ethylene alkyl acrylate copolymer
  • EBA ethylene butyl acrylate copolymer
  • the layer of bonding material should have an average thickness of less than 100 micron, more preferably less than 50 micron and most preferably less than 15 micron.
  • the bonding layer might have another function such shielding against UV light and/or temperature and/or moisture and/or chemicals and/or bio organisms.
  • the layer might also have electrical or anti-static or fire retarding properties.
  • the sheet of integrated high performance polymer is stretched with a stretch ratio, (i.e. ratio between length of sheet after stretching and original length of sheet before stretching) of more than 5, preferably more than 15, most preferably more than 50.
  • a stretch ratio i.e. ratio between length of sheet after stretching and original length of sheet before stretching
  • a pressure sensitive adhesive is an adhesive which forms a bond when pressure is applied to join the adhesive with the adherent.
  • the layer of pressure sensitive (PSA) adhesive is chosen from a group of pressure sensitive adhesives comprising acrylics, bio-based acrylate, butyl rubber, Ethylene-vinyl acetate (EVA), Natural rubber, nitriles, Silicone rubbers, Styrene block copolymers (SBC), Styrene-butadiene-styrene (SBS), Styrene-ethylene/butylene-styrene (SEBS), Styrene-ethylene/propylene (SEP)Styrene-isoprene-styrene (SIS), Vinyl ethers, or mixture thereof.
  • SBC Styrene block copolymers
  • SBS Styrene-butadiene-styrene
  • SEBS Styrene-ethylene/butylene-styrene
  • SEP Styrene-ethylene/prop
  • the pressure sensitive adhesive is preferably applied to at least 80% of the surface of at least one side of the sheet of oriented integrated high performance polymers. More preferably it is at least applied to 90% and most preferably to more 99% of the surface of at least one side of the sheet of oriented integrated high performance polymers.
  • the layer of pressure sensitive adhesive has an average thickness of preferably less than 200 micron and more preferably between 3-50 micron.
  • the adhesion of the pressure sensitive adhesive to the sheet of integrated oriented high performance polymers is improved exposing the surface of sheet to which the pressure sensitive adhesive will be applied to a plasma treatment or corona treatment.
  • the invention also comprises winding the sheet of oriented integrated high performance polymers provided with pressure sensitive adhesive for forming a roll. To be able to unwind said roll it might be required to apply a release foil to the layer of pressure sensitive adhesive or alternatively applying an anti-sticking surface to the, non PSA containing side of sheet of oriented integrated high performance polymers or the bonding layer.
  • the film according to the invention enables the adherence of a layer of high performance polymers to a secondary object, which can be any object were the product is applied to and can be made from any materials such as glass, polymers, metals, ceramics, tissue, skin, paper, plaster, fabric, concrete or wood.
  • the product according to the invention can in principle also be applied on a film according to the invention.
  • an additional layer is applied to the sheet of oriented integrated high performance polymers provided with pressure sensitive adhesive such as a layer of foam or metallic foil.
  • the present invention it is possible to use high performance polymer fibres, to make the sheet of oriented integrated high performance polymers by providing several individual high performance fibers, aligning said several individual high performance fibers and forming a sheet of oriented integrated high performance polymers by applying a bonding layer on at least one side of the aligned array of high performance fibers.
  • High performance polymer fibres are characterized by their high tensile strength which is typically > 1 GPa and tensile modules of at least 40 GPa.
  • Examples of high performance polymer fibres are polyolefins like ultra-high molecular weight polyethylene (UHMWPE) fibres such as Dyneema and Spectra or highly drawn polyethylene or polypropylene fibres, para-aramide fibres such as Twaron and Kevlar, poly(p-phenyle-2,6-benzobisoxazole) (PBO) fibre such as Zylon, carbon fibres such as Torayca and highly drawn nylon fibres.
  • UHMWPE ultra-high molecular weight polyethylene
  • PBO poly(p-phenyle-2,6-benzobisoxazole)
  • the high performance fibres according to the inventions are aligned in a UD alignment.
  • the fibres are considered to be U D aligned when the majority, thus more than 50%, of the fibres are aligned in the same direction.
  • a minimum of 75% of the fibres is aligned in the same direction, in more preferred embodiment 90% of the fibres is aligned in the same direction and most preferably all of the fibres are aligned in the same direction.
  • Fig 1 shows an embodiment of the present invention.
  • Fig 2 shows another embodiment of the present invention.
  • Fig 4 shows another embodiment of the present invention.
  • Fig 5 shows another embodiment of the present invention.
  • Fig 6 shows another embodiment of the present invention.
  • Fig 7 shows another embodiment of the present invention.
  • Fig 8 shows another embodiment of the present invention.
  • Fig 9 shows another embodiment of the present invention.
  • Fig 10 shows another embodiment of the present invention.
  • Fig 1 1 shows another embodiment of the present invention.
  • Fig 12 shows another embodiment of the present invention.
  • Fig 13 shows another embodiment of the present invention.
  • Fig 14 shows another embodiment of the present invention.
  • Fig 15 shows an embodiment of the method according to the present invention.
  • the film of high performance polymers 1 comprises a sheet of oriented integrated high performance polymers 2 provided with a layer of pressure sensitive adhesive 3.
  • Fig 2 shows a film of high performance polymers 10 comprising a sheet of oriented integrated high performance polymers 2 and two layers of pressure sensitive adhesive 3. These two layers 3 can be identical or include different types of pressure sensitive adhesive.
  • Fig 3 shows a film of high performance polymers 20 comprising a sheet of oriented integrated high performance polymers 2 sandwiched between a layer of pressure sensitive adhesive 3 and a bonding layer 4.
  • Fig 4 shows a film of high performance polymers 30 comprising an anti sticking surface or layer 6, a bonding layer 4, a sheet of oriented integrated high performance polymers 2 and a layer of pressure sensitive adhesive 3.
  • Fig 5 shows a film of high performance polymers 40 comprising a pressure sensitive adhesive layer 3, a bonding layer 4, a sheet of oriented integrated high performance polymers 2 and a layer of pressure sensitive adhesive 3.
  • Fig 6 shows a film of high performance polymers 50 comprising a pressure sensitive adhesive layer 3, a bonding layer 4 and a sheet of oriented integrated high performance polymers 2.
  • Fig 7 shows a film of high performance polymers 60 comprising an array of unidirectional aligned fibers 5, a bonding layer 4 and a layer of pressure sensitive adhesive 3.
  • Fig 8 shows a film of high performance polymers 100 comprising a layer of pressure sensitive adhesive 3, an array of unidirectional aligned fibers 5, a bonding layer 4 and a layer of pressure sensitive adhesive 3.
  • the array of unidirectional aligned fibers 5 is embedded in the bonding layer 4.
  • Fig 9 shows a film of high performance polymers 1 10 comprising a layer of pressure sensitive adhesive 3, an array of unidirectional aligned fibers 5, a first bonding layer 4, a second bonding layer 4 and a layer of pressure sensitive adhesive 3.
  • the array of unidirectional aligned fibers 5 is embedded in the first bonding layer 4.
  • Fig 10 shows a film of high performance polymers 120 comprising a layer of pressure sensitive adhesive 3, an array of unidirectional aligned fibers 5, a bonding layer 4, a layer of pressure sensitive adhesive 3 and an anti sticking surface or layer 6.
  • the array of unidirectional aligned fibers 5 is embedded in bonding layer 4.
  • Fig 1 1 shows a film of high performance polymers 130 comprising a release foil 7, a layer of pressure sensitive adhesive 3, and a sheet of oriented integrated high performance polymers 2.
  • Fig 12 shows a film of high performance polymers 140 comprising a release foil 7, a layer of pressure sensitive adhesive 3, and a sheet of oriented integrated high performance polymers 2, wherein the plasma treatment of the sheet of oriented integrated high performance polymers is indicated with reference number 8.
  • Fig 13 shows a film of high performance polymers 140 comprising a release foil 7, a layer of pressure sensitive adhesive 3, a sheet of oriented integrated high performance polymers 2 and a bonding layer 4, wherein the plasma treatment of the sheet of oriented integrated high performance polymers is indicated with reference number 8.
  • Fig 14 shows a film of high performance polymers 150 comprising an array of unidirectional aligned fibers 5, a bonding layer 4, a layer of pressure sensitive adhesive 3 and a release foil 7, wherein the plasma treatment of the sheet of oriented integrated high performance polymers is indicated with reference number 8.
  • Fig 15 shows a preferred embodiment of the method according to the present invention.
  • a step indicated with reference number 160 there is a step of providing sheets of oriented integrated high performance polymers on rolls.
  • Step 161 refers to unwinding sheets of oriented integrated high performance polymers from rolls.
  • Step 162 refers to tensioning sheets of oriented integrated high performance polymers.
  • Step 163 refers to aligning sheets of oriented integrated high performance polymers with positioning roller.
  • Step 164 refers to providing bonding layer.
  • Step 165 refers to providing PSA on a release layer.
  • Step 166 refers to forming a film by applying pressure and temperature with a roll laminator.
  • Step 167 refers pulling the film with a calandar roller.
  • Step 168 refers to tensioning the film with tension roller.
  • Step 169 refers to winding the film with a winding roller. Examples of types of pressure sensitive adhesive, unidirectional aligned fibers, bonding layer, anti sticking surface or layer and oriented integrated high performance
  • Ultra high molecular weight polyethylene (UHMWPE) in particulate form is compacted to form a sheet of integrated UHMWPE.
  • Said sheet of integrated UHMWPE is stretched 140 times to form a sheet of oriented integrated UHMWPE. This process of compacting and stretching is done in a continuous process.
  • an acrylic based pressure sensitive adhesive (PSA) is applied to one side of said sheet, and a release foil of waxpaper is applied to the PSA.
  • PSA pressure sensitive adhesive
  • the composite of the sheet of oriented integrated UHMWPE, pressure sensitive adhesive and release foil is wound up to form a roll. This construction can be found in Figure 14.
  • Ultra high molecular weight polyethylene (UHMWPE) in particulate form is compacted to form a sheet of integrated UHMWPE.
  • Said sheet of integrated UHMWPE is stretched 140 times to form a sheet of oriented integrated UHMWPE.
  • This process of compacting and stretching is done in a continuous process after thus forming the sheet of oriented integrated UHMWPE, one surface of said sheet is exposed to a plasma treatment.
  • the plasma treatment is done to enhance the adhesion of a pressure sensitive adhesive to the surface thus treated.
  • an acrylic based pressure sensitive adhesive (PSA) is applied to plasma exposed surface of the sheet of oriented integrated UHMWPE, and a release foil of waxpaper is applied to the PSA.
  • PSA acrylic based pressure sensitive adhesive
  • the composite of the sheet of oriented integrated UHMWPE, pressure sensitive adhesive and release foil is wound up to form a roll. This construction can be found in Figure 15.
  • Ultra high molecular weight polyethylene (UHMWPE) in particulate form is compacted to form a sheet of integrated UHMWPE.
  • Said sheet of integrated UHMWPE is stretched 140 times to form a sheet of oriented integrated UHMWPE. This process of compacting and stretching is done in a continuous process.
  • a polyethylene bonding layer is applied to one surface of the sheet of oriented integrated UHMWPE.
  • the other surface of said sheet i.e. the surface without a bonding layer, is exposed to a plasma treatment.
  • the plasma treatment is done to enhance the adhesion of a pressure sensitive adhesive (PSA) to the surface thus treated.
  • PSA pressure sensitive adhesive
  • Ultra high molecular weight polyethylene (UHMWPE) fibres are spread and aligned adjacent to each other.
  • a bonding layer of ethylene vinyl acetate (EVA) is applied to one surface of the array of aligned UHMWPE fibers forming a sheet of oriented integrated UHMWPE.
  • EVA ethylene vinyl acetate
  • the process of aligning UHMWPE fibres is done in a continuous process.
  • one surface of said sheet is exposed to a plasma treatment.
  • the plasma treatment is done to enhance the adhesion of a pressure sensitive adhesive (PSA) to the surface thus treated.
  • PSA pressure sensitive adhesive
  • the film according to the present invention is applied to a tarpaulin and used to prevent the damage thereof.
  • a tarpaulin is a cover for a cargo compartment of a truck, or a tarpaulin to be used in a tent.
  • the sheet of oriented integrated high performance polymers, which is included in said film, is particularly strong and difficult to tear and when said film is applied to the tarpaulin.
  • the present film can prevent accidental or intentional damage of said tarpaulin.
  • the present film can also be used to restore a damaged tarpaulin.
  • the film could be based on more than one sheet of oriented integrated high performance polymers.
  • multiple films are applied to the tarpaulin and preferably under different orientation with respect to each other. Most preferably it is under at least three different orientations.
  • Example 6 This example refers to a specific use of the present film.
  • the film according to the invention has a high thermal conductivity and low electrical conductivity and can for example be used as a thermally conductive adhesive tape for connecting heat generating components with heat-sinks.
  • the thermal conductivity of the present film is larger than 0.5 W/m*K, more preferably larger than 1 W/m*K and most preferably larger than 5 W/m*K.
  • a film with such a high thermal conductivity can be made by using ultra high molecular weight polyethylene (U HMWPE) in particulate form, compacting the UHMWPE for forming a sheet of integrated UHMWPE and stretching (preferably at least 10 times, more preferably at least 50 times) the sheet of integrated UHMWPE for obtaining a sheet of oriented integrated UHMWPE. It is also possible to provide the sheet with a relief pattern, for example by the application of a thermal embossing step on the sheet of oriented integrated UHMWPE. Next, a pressure sensitive adhesive is applied on both sides of the sheet of oriented integrated UHMWPE. Preferably the pressure sensitive adhesive (PSA) has a high thermal conductivity.
  • PSA pressure sensitive adhesive
  • the PSA might contain thermally conductive fillers such as Boron Nitride.
  • the sheet of sheet of oriented integrated U HMWPE is wound up into a roll.
  • the film with high thermal conductivity can also be based on a sheet of oriented integrated U HMWPE made by aligning UHMWPE fibers and applying a thin bonding layer of for example LDPE to said aligned UHMWPE fibers.
  • the film according to the present invention comprising a sheet of oriented integrated UHMWPE has been applied for under water applications and off-shore application.
  • the films showed a high degree of adhesiveness.
  • the bonding layer according to the invention has a surprising effect on the ease of cutting the sheet of oriented integrated high performance fibers. It is known from prior art that it is particularly difficult to cut fabrics, ropes or other articles comprising high performance fibers and sheets to exact size. One assumes that first of all high performance fibers and sheets are intrinsically hard to cut and secondly the high performance fibers and sheets are poorly connected to each other. Hence cutting of articles comprising high performance materials is difficult and typically results in fibrillation at the edges. Special designed scissors, with at least 1 corrugated blade and particular blade angles can be used to overcome this particular problem.
  • the present bonding layer enables using simple cutting methods for cutting said film according to the invention, and which comprises a sheet of oriented integrated high performance polymers, to an exact size without fibrillated edges.
  • the present film can be cut by folding the film over a normal knife and cutting with said knife the film. Normally this cutting procedure would be difficult and certainly result in fibrillated edges. With the present bonding layer, this cutting procedure results in a controlled cut with non-fibrillated edges.
  • the present film can be cut by using a sharp knife when the film is placed on a rigid substrate. It is found that without bonding layer the film easily fibrillated and is difficult to cut. When using a bonding layer this particular problem can be overcome.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

Cette invention concerne un procédé de fabrication d'un film à base de polymères haute performance, le procédé comprenant les étapes suivantes : a) la formation d'une feuille à base de polymères haute performance orientés intégrés, b) l'application d'un adhésif sensible à la pression sur au moins un côté de la feuille à base de polymères haute performance orientés intégrés, c) l'enroulement de la feuille à base de polymères haute performance orientés intégrés pourvue de l'adhésif sensible à la pression pour former un rouleau.
PCT/NL2014/050686 2013-10-03 2014-10-03 Procédé de fabrication d'un film à base de polymères haute performance WO2015050452A1 (fr)

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NL2011548 2013-10-03
NL2011548A NL2011548C2 (en) 2013-10-03 2013-10-03 A method for manufacturing a film or high performance polymers
NL2012733 2014-05-01
NL2012733 2014-05-01

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WO2015050452A1 true WO2015050452A1 (fr) 2015-04-09

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WO2016097292A1 (fr) * 2014-12-19 2016-06-23 Dsm Ip Assets B.V. Bandes adhésives de polyéthylène à poids moléculaire ultra-élevé

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US5503791A (en) 1991-02-18 1996-04-02 Dsm N.V. Microporous film of polyethylene and process for the production thereof
US5756660A (en) 1993-01-20 1998-05-26 Nippon Oil Company, Limited Process for producing polyethylene material of high strength and high plastic modulus
JP2007291705A (ja) 2006-04-25 2007-11-08 Toray Ind Inc 繊維強化樹脂板、補強構造物および構造物の補強方法
WO2008040510A1 (fr) 2006-10-05 2008-04-10 Novameer B.V. Procédé de production de tissus comprenant des rubans polymères unidirectionnellement disposés
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US5106558A (en) 1989-05-02 1992-04-21 Nippon Oil Co., Ltd. Method for continuous preparation of polyethylene material having high strength and high modulus of elasticity
US5106555A (en) 1989-07-28 1992-04-21 Nippon Oil Co., Ltd. Process for the continuous production of high-strength and high-modulus polyethylene material
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016097292A1 (fr) * 2014-12-19 2016-06-23 Dsm Ip Assets B.V. Bandes adhésives de polyéthylène à poids moléculaire ultra-élevé
CN107207917A (zh) * 2014-12-19 2017-09-26 帝斯曼知识产权资产管理有限公司 超高分子量聚乙烯胶粘带

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