CN102596768A - Polymer film for protecting glass sheets - Google Patents
Polymer film for protecting glass sheets Download PDFInfo
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- CN102596768A CN102596768A CN2010800353408A CN201080035340A CN102596768A CN 102596768 A CN102596768 A CN 102596768A CN 2010800353408 A CN2010800353408 A CN 2010800353408A CN 201080035340 A CN201080035340 A CN 201080035340A CN 102596768 A CN102596768 A CN 102596768A
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- Prior art keywords
- polymer film
- stratum nucleare
- thin polymer
- glass
- top layer
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
- C03C27/06—Joining glass to glass by processes other than fusing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/10—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
- B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
- B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
- B32B17/10045—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets with at least one intermediate layer consisting of a glass sheet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/06—Interconnection of layers permitting easy separation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D57/00—Internal frames or supports for flexible articles, e.g. stiffeners; Separators for articles packaged in stacks or groups, e.g. for preventing adhesion of sticky articles
- B65D57/002—Separators for articles packaged in stacks or groups, e.g. stacked or nested
- B65D57/003—Separators for articles packaged in stacks or groups, e.g. stacked or nested for horizontally placed articles, i.e. for stacked or nested articles
- B65D57/004—Separators for articles packaged in stacks or groups, e.g. stacked or nested for horizontally placed articles, i.e. for stacked or nested articles the articles being substantially flat panels, e.g. wooden planks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
- B65D85/30—Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure
- B65D85/48—Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure for glass sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G49/00—Conveying systems characterised by their application for specified purposes not otherwise provided for
- B65G49/05—Conveying systems characterised by their application for specified purposes not otherwise provided for for fragile or damageable materials or articles
- B65G49/06—Conveying systems characterised by their application for specified purposes not otherwise provided for for fragile or damageable materials or articles for fragile sheets, e.g. glass
- B65G49/068—Stacking or destacking devices; Means for preventing damage to stacked sheets, e.g. spaces
- B65G49/069—Means for avoiding damage to stacked plate glass, e.g. by interposing paper or powder spacers in the stack
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2266/00—Composition of foam
- B32B2266/02—Organic
- B32B2266/0214—Materials belonging to B32B27/00
- B32B2266/025—Polyolefin
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2218/00—Methods for coating glass
- C03C2218/30—Aspects of methods for coating glass not covered above
- C03C2218/355—Temporary coating
Abstract
This disclosure features a method of protecting glass sheets from scratching and staining. A first surface of polymer film is positioned in contact with a major surface of a glass sheet. An additional glass sheet is placed against the polymer film such that a major surface of the additional glass sheet contacts a second surface of the film. Both of the first and second surfaces of the film have a peel value of less than 50g relative to the glass sheets and a surface roughness Ra of greater than 0.5 micron. The method will prevent scratches on a glass surface from the bottom of the draw, during shipment between glass forming plants, as well as during shipment and handling in connection with customers of glass processing plants.
Description
The preceence that No. the 61/224584th, the U.S. Patent application that the application requires to submit on July 10th, 2009.
Technical field
The present invention relates to the packing of inorganic board-like material such as glass board.Especially, the present invention relates to be used to pack the method that exempts from scratch and pollutants with cover glass plate surface.The present invention for example can be used for packing and protecting the initial surface of LCD substrate of glass.
Background technology
The substrate of glass that is used to make LCD display requires to have the initial surface that does not have scratch and surface particles basically.Because material and related method step can cause superficial degradation and introduce pollutants, pack and transport this glass board and face great challenge.All the more so for long-distance transport.In addition, the requirement that reduces traffic cost means that glass board should pack densely as far as possible.
The whole bag of tricks is used to pack the LCD substrate of glass.Scheme shown in Figure 1 is: between adjacent layer glass plate 101 and 103, use three platy layers, comprise being coated in glass board 101 and 103 surperficial two polymeric outer layer plates 105 and 107 respectively, and be sandwiched in two ply of papers 113 between the polymeric layer.This method needs a thin polymer film coating machine and thin polymer film when packing, when sealing off, need the film stripping machine to remove the thin polymer film of coating.
A kind of optional method of using single-part stationery that comprises is used to reduce the complexity and the number of method step.Find that such magma level cardboard can be used for the high density packing of glass board; Said magma level cardboard having minimum pollution and scratch source and the height calendering surface with low-friction coefficient and low Sheffield smoothness reducing scratch as far as possible, and is shifted to glass surface through compacting with the prevention potential pollutant through processing.Yet, to compare with the method for above-mentioned three layers of packing, this method shows much more scratch and pit surface defective.
Therefore, need a kind of glass plate packing method that has required cost benefit and surface protection ability simultaneously of exploitation.The present invention meets this requirement and other requirement.
Summary of the invention
This disclose more of the present invention aspect.Being appreciated that these aspects may intersect each other also maybe not can.Therefore, the part of an aspect possibly drop in the scope on the other hand, and vice versa.
Each aspect is all set forth through a large amount of embodiments, and these embodiments comprise the embodiment that one or more is concrete again.Being appreciated that these embodiments may be intersected each other also maybe not can.Therefore, the part of an embodiment or its specific embodiments possibly drop on or not drop in the scope of another embodiment or its specific embodiments, and vice versa.
First aspect of the present invention relates to the method that a kind of cover glass plate avoids scratch and pollutants, and it comprises:
A thin polymer film is placed on the described glass board, and wherein said thin polymer film has first and second surface and described first surface to contact with a main surface of described glass board;
Near described thin polymer film a main surface of described another glass board is contacted with described second surface another described glass board,
Wherein said first surface and second surface with respect to the peel value (peel value) of said glass board all less than 50g and surface roughness Ra all greater than 0.5 micron.
In the present invention's some embodiment aspect first, two polymeric surface layers that described thin polymer film comprises a foam of polymers center stratum nucleare and clamps this stratum nucleare, described stratum nucleare and top layer are integrally formed mutually.In certain embodiments, described foam stratum nucleare comprises and is of a size of 0.5 micron to 20.0 microns abscess.In certain embodiments, described stratum nucleare is made by middle density or high density polyethylene (HDPE), and described top layer is made by low density polyethylene (LDPE), linear low density polyethylene or ldpe copolymer.
In the present invention's some embodiment aspect first; Two polymeric surface layers that described thin polymer film comprises a center stratum nucleare and clamps said stratum nucleare; Described stratum nucleare has the stiffness that is embodied by its poly-mer; The elastic tensile modulus of said poly-mer is greater than 80kpsi, and described stratum nucleare and top layer are integrally formed mutually.In certain embodiments, described stratum nucleare is made by polyethylene terephthalate, polystyrene or polypropylene, and described top layer is made by low density polyethylene (LDPE), linear low density polyethylene or ldpe copolymer.
In the present invention's some embodiment aspect first, described thin polymer film comprises a paper center stratum nucleare and two polymeric surface layers clamping said stratum nucleare, and described stratum nucleare and described top layer are integrally formed mutually.In certain embodiments, said top layer is by low density polyethylene (LDPE), and linear low density polyethylene or ldpe copolymer make.
In the present invention's some embodiment aspect first, described thin polymer film comprises a foam of polymers simple layer that is made by poly-vinyl, polypropylene, polystyrene or biaxial stretch-formed polypropylene.In certain embodiments, described foam stratum nucleare comprises and is of a size of 0.5 micron to 20.0 microns abscess.
In the present invention's some embodiment aspect first; Method comprises and repeats to place said thin polymer film and place the step of another said glass board near it; Up to being arranged in a folded said glass board, has said thin polymer film between the wherein adjacent said glass board.
In the present invention's some embodiment aspect first, said top layer comprises a kind of long-chain fatty acid ester or a kind of long chain fatty acids amides slip agent.
In the present invention's some embodiment aspect first, said slip agent is present on said first surface and said second surface with 100 to 5000ppm consumption.In certain embodiments, said slip agent comprises erucyl amide.
In the present invention's some embodiment aspect first, described thin polymer film gross thickness is about 60 microns to 300 microns.In certain embodiments; Said thin polymer film comprises a centre polymer stratum nucleare and two polymeric surface layers clamping said stratum nucleare; Described stratum nucleare and described top layer are integrally formed mutually; The elastic tensile modulus of the said poly-mer on said top layer is 20 to 80kpsi, and the elastic tensile modulus of the said poly-mer of said stratum nucleare is 80kpsi at least.In certain embodiments, the thickness on each said top layer is about 20 microns to 100 microns.In certain embodiments, the thickness of said stratum nucleare is about 20 microns to 100 microns.
In the present invention's some embodiment aspect first, described surface roughness Ra is 1.5 microns to 15 microns.
In the present invention's some embodiment aspect first, said first of said thin polymer film is the surface roughness Ra of the fluctuation of its size much larger than said thin polymer film with second surface characteristics.
In the present invention's some embodiment aspect first, described slip agent is used for preventing that as barrier layere the component on said top layer from staiing glass board.
In many aspects of the present invention and/or the embodiment one has in the following advantage one or multinomial.At first, the use that has an isolating polymer film of said structure need not be laminated to thin polymer film glass pane surface or need it does not peeled off from glass surface during when opening when when packing.Secondly, when thin polymer film comprised a kind of slip agent, film can play the effect of transmitting portions slip agent to surface to be protected, and this can further strengthen the protection to the surface.
Other embodiments of this paper are illustrated part in detailed description and any claim afterwards, part can obtain from describe in detail, perhaps can from enforcement of the present invention, learn.General introduction before being appreciated that and following detailed description only be exemplary with illustrative, is not restricted to the present invention disclosed and/or claimed.
This explanation included in by accompanying drawing and as the part of this explanation, it illustrates some instance of this paper, and is used to explain the principle of present disclosure and does not limit it with describing.Same numeral is represented components identical in whole accompanying drawing.
Description of drawings
In the accompanying drawings:
Fig. 1 has schematically set forth method for protecting surface of the prior art, and it covers thin polymer film on glass, and a piece of paper plate holder is (three-tier system) between said film;
Fig. 2 has schematically set forth first embodiment of the present invention, and it is using the film that comprises a center foam stratum nucleare that is sandwiched between two polymeric surface layers between two adjacent sheets of glass;
Fig. 3 has schematically set forth second embodiment of the present invention, and it comprises the film that is sandwiched in a center stratum nucleare between two polymeric surface layers in use between two adjacent sheets of glass, and wherein the stiffness on the stiffness ratio top layer of stratum nucleare is big;
Fig. 4 has schematically set forth the 3rd embodiment of the present invention, and it comprises the film that is sandwiched in a middle insides stratum nucleare between two polymeric surface layers in use between two adjacent sheets of glass; And
Fig. 5 has schematically set forth the 4th embodiment of the present invention, and it uses the separating film that comprises a foam simple layer between two adjacent sheets of glass.
Describe in detail
The invention discloses a kind of thin polymer film that uses comes the cover glass plate to avoid the method for scratch and pollution.Usually be considered to have less thickness although thin polymer film is compared with polymer sheet, thin polymer film and polymer sheet can exchange use in this article.The thin polymer film interlayer has lower adhesiveness to glass, and has the roughness of surface that is enough to provide air pocket, air pocket through buffer action make glass avoid scratch and help when the dismounting glass board separately.In addition, with the film forming outside face of a kind of flexible polymer (low density polyethylene (LDPE) or linear low density polyethylene), this helps the cover glass surface not invaded by particle, therefore can avoid scratch.This is the improvement to the improvement of piece of paper material interlayer and the Visqueen thin polymer film that has the folder layer therebetween that on glass board, uses.In the transportation between the glass production factory and in the client's of client's transportation and glass processing factory treating process, thin polymer film of the present invention all can prevent the scratch that pulls from the bottom of glass surface.
In the method, first surface of thin polymer film contacts with a main surface of glass board.Another glass board is placed near thin polymer film, makes a main surface of said another glass board contact with second surface of this film.All less than 50g (gram), roughness of surface is all greater than 0.5 micron (0.5x10 with respect to the peel value of glass board for first surface of film and second surface
-6Rice).This peel value is to produce according to the method that hereinafter described assignee Corning Incorporated provides.
The characteristics of an embodiment of this method are to use the thin polymer film that comprises a foam of polymers center stratum nucleare and clamp two polymeric surface layers of this stratum nucleare.Stratum nucleare and top layer are integrally formed mutually.The foam stratum nucleare can have and is of a size of 0.5 micron to 20 microns or bigger abscess.Stratum nucleare can prepare through lower density, middle density or high density polyethylene (HDPE), preferred medium density polyethylene.The top layer can prepare through low density polyethylene (LDPE), linear low density polyethylene or ldpe copolymer, preferred low density polyethylene (LDPE).
Another embodiment of this method is used and is comprised center stratum nucleare and the thin polymer film of clamping two polymeric surface layers of this stratum nucleare.The stiffness of being represented by elastic tensile modulus of the poly-mer of the big and stratum nucleare of the stiffness ratio top layer stiffness of stratum nucleare is greater than 80kpsi, especially greater than 100kpsi (ASTMD638).Stratum nucleare and top layer are integrally formed mutually.Stratum nucleare is processed by polyethylene terephthalate (PET), polystyrene or polypropylene.Process through low density polyethylene (LDPE), linear low density polyethylene or ldpe copolymer on the top layer.
Another embodiment of this method is used and is comprised paper center stratum nucleare and the thin polymer film of clamping two polymeric surface layers of this stratum nucleare.Stratum nucleare and top layer are integrally formed mutually.The top layer is processed by low density polyethylene (LDPE), linear low density polyethylene or ldpe copolymer.
Another embodiment of this method is used the thin polymer film that comprises the foam of polymers simple layer of being processed by poly-vinyl, polypropylene, polystyrene or biaxial stretch-formed polypropylene (BOPP).The foam stratum nucleare comprises and is of a size of 0.5 micron to 20.0 microns abscess.
In the more excellent embodiment of some of this method, between adjacent sheets of glass, except thin polymer film, there is not other material layer (that is to say do not have a thin polymer film coating, do not have independent folder layer material yet) on glass.Top layer and stratum nucleare can be regarded the subgrade of thin polymer film as.Yet, do not get rid of in certain embodiments of the invention except that having thin polymer film, also have the Additional Protection layer and be present on the glass pane surface to be protected.
About the further details of this method, poly-mer (before processing the film top layer) can have lower elastic tensile modulus, and for example 20kpsi is to 80kpsi (ASTM D638).The higher elasticity tensile modulus of stratum nucleare can be 80kpsi, especially greater than 100kpsi (ASTM D638).For the thin polymer film that comprises the foam simple layer, can have lower or higher elastic tensile modulus, preferred higher elasticity tensile modulus.Suitable elastic tensile modulus is the feasible elastic tensile modulus that can handle polymer sheet layer easily in loading and uninstall process.The step that repeats to place thin polymer film and place another glass board near thin polymer film is up to being formed on the laminated glass plate that thin polymer film is arranged between the adjacent sheets of glass.The top layer can comprise long-chain fatty acid ester or long chain fatty acids amides slip agent.Slip agent can the amount with 100 to 5000ppm exist on first surface of thin polymer film and each of second surface.A kind of specific slip agent is an erucyl amide.In one embodiment, the thin polymer film gross thickness is about 60 microns to 300 microns, and in certain embodiments, thickness is 60 microns to 120 microns.In one embodiment, thin polymer film can comprise a center stratum nucleare and two polymeric surface layers clamping this stratum nucleare; Stratum nucleare and top layer are integrally formed mutually.Top layer and stratum nucleare can have lower and higher modulus of elasticity mentioned above respectively.The thickness on each top layer can be 20 microns to 100 microns in this case, is 20 microns to 40 microns in certain embodiments.The thickness of stratum nucleare can be about 20 microns to 100 microns, is 20 microns to 40 microns in certain embodiments.
The slip agent that here uses contains in the thin polymer film of this slip agent and surface lubrication is provided afterwards immediately in processing.If be mixed in the polymer thin-film material, slip agent works as transferring to the built-in lubrication agent on its existing surface gradually.In this article, the lubricated glass pane surface that contacts to the polymer thin-film material that contains slip agent that provides.
The thin polymer film of this paper has advantage.At first, be different from the Visqueen film, it is not to be laminated on the glass board, so need not increase extra production stage and increase the thin polymer film coating machine and the film stripping machine of manufacturing cost.Because the low peel value that the thin polymer film of this paper has specific surface roughness Ra and in following strip step, discusses, so it did not adhere to strong shortcoming with glass.In addition, the thin polymer film of this paper avoids also better than glass paper in the scratch at cover glass.The thin polymer film of this paper can use the DensePak of Corning Incorporated
TMMethod is used for the packing of not edging glass to be transported or the packing of edging glass to be transported.
The present invention will do further to set forth through some specific embodiments, and these schemes have no intention to limit it.
In an illustrative methods, first surface of thin polymer film contacts with a main surface of glass board.Another glass board near thin polymer film so that one of this another glass board main surface contact with second surface of film.All less than 50g, surface roughness Ra is all greater than 0.5 micron (0.5x10 with respect to the peel value of glass board for first of film and second surface
-6Rice).In certain embodiments, thin polymer film can comprise and is sandwiched in two stratum nucleares between the top layer.More the elastic tensile modulus of the poly-mer on flexible top layer is that 20kpsi is to 80kpsi.If require the bigger material of stiffness, the elastic tensile modulus of poly-mer (for example stratum nucleare poly-mer) can be greater than 80kpsi.In the situation of foam simple layer 501, it can have lower or higher elastic tensile modulus value as herein described, preferably than low value.In addition, the thin polymer film gross thickness is about 60 microns to 300 microns.The thickness on each top layer can be about 20 microns to 100 microns.The thickness of stratum nucleare can be about 20 microns to 100 microns.The peel value that this paper mentioned is based on hereinafter described cessionary Corning Incorporated to the peel strength test of no film of adhesiveness.Thin polymer film can be in four variants shown in Fig. 2-5.
Each thin polymer film 200 comprises a center foam stratum nucleare 201 and two outer polymer top layers 203 of clamping this stratum nucleare in the embodiment of in Fig. 2, showing.The top layer has first and second outside face 205 and 207, and its plane for inorganic glass materials has low adhesive capacity.The slip agent that lubricating function is provided equally also can be contained in the top layer.Stratum nucleare has outside face 209 and 211, and it contacts with 215 with the inside face 213 on top layer, and the stratum nucleare outside face has the foam structure that is used to provide buffering of microcosmic or macroscopic view.In institute's drawings attached of present disclosure, for clarity, thin polymer film is with shown in exploded view for a laminated glass plate (glass board 101,103 and 217).In the actual lamination under being in pressure load; Top layer outside face 205,207 contacts with 111 with the inside face 109 of first pair of adjacent sheets of glass 101,103 of glass; The inside face 219,221 of second pair of adjacent sheets of glass 103,217 of outside face 205,207 and this lamination contacts; And for all the other poly-mers and glass board of this lamination, by that analogy.
In thin polymer film 200, the poly-mer that is used for the top layer is that (for example, density is less than 0.93g/cm for low density polyethylene (LDPE)
3), linear low density polyethylene or ldpe copolymer.The poly-mer that is used for stratum nucleare is a kind of low density polyethylene (LDPE), (for example, density is about 0.94g/cm to a kind of medium density polyethylene
3) or be that (for example: density is 0.94 to 0.97g/cm to a kind of high density polyethylene (HDPE)
3), preferred medium density polyethylene.The stratum nucleare foam has size and is about 0.5 micron to 20.0 microns or bigger foam structure.The CBA that can be used to prepare the stratum nucleare foam comprises: for example azo dicarbonamide, modification azo dicarbonamide, 4,4-OBSH, trihydrazinotriazine.Other CBA as known in the art also can use.Physical blowing agent also can be used for foaming, comprises for example nitrogen or halogenated hydrocarbons.
Each thin polymer film 300 comprises a site polymerization stratum nucleare 301 and two outer polymer top layers 303 of clamping this stratum nucleare in the embodiment of in Fig. 3, showing.The top layer has first and second surface 305 and 307, and its plane for inorganic glass materials has low adhesive capacity.The slip agent that lubricating function is provided also can be contained in the top layer.Stratum nucleare comprises the polymeric layer that one deck is different from the top layer poly-mer, and its stiffness ratio top layer poly-mer stiffness is big.Stratum nucleare outside face 309 and 311 contacts with top layer inside face 313 and 315.In the laminated glass plate under being in pressure load; The interior glass surface 109 of a glass board 101 in first outside face 305 on top layer and the first pair of glass board of this lamination contacts, and second outside face 307 in top layer contacts with the interior glass surface 111 of adjacent sheets of glass 103 simultaneously.The interior glass surface 219 of the glass board 103 in first outside face 305 on top layer and the second pair of glass board of this lamination contacts, and second outside face 307 in top layer contacts with the interior glass surface 221 of adjacent sheets of glass 217 simultaneously.Alternately arranging of thin polymer film and glass board continues in whole lamination.
In thin polymer film 300, the poly-mer that is used for the top layer is that (for example, density is less than 0.93g/cm for low density polyethylene (LDPE)
3), linear low density polyethylene or ldpe copolymer.The poly-mer that is used for stratum nucleare is hard polystyrene (stiff polystyrene), polypropylene or PET.The elastic tensile modulus of top layer poly-mer was that 20kpsi is to 80kpsi (especially about 30kpsi is to 60kpsi) when the low stiffness on top layer showed as room temperature.The elastic tensile modulus of stone polymer was greater than 80kpsi (especially greater than 150kpsi) when the stiffness of stratum nucleare showed as room temperature.The stiffness of stratum nucleare uses the machine tool of air pump and mechanical gripper fixed polymer film can easily handle film for making.
Each thin polymer film 400 of Fig. 4 comprises a middle insides stratum nucleare 401 and two outer polymer top layers 403 of clamping this stratum nucleare.The top layer has first and second outside face 405 and 407, and its plane for inorganic glass materials has low adhesive capacity.The slip agent that lubricating function is provided also can be contained in the top layer.The poly-mer that is used for the top layer is that (for example, density is less than 0.93g/cm for low density polyethylene (LDPE)
3), linear low density polyethylene or ldpe copolymer.Paper can be any suitable paper that buffering can be provided, like the paper described in Kraft paper or the open text WO2008/002584 (including this specification sheets in way of reference).Paper is because its porosity can provide stiffness and buffering effect.Paper has outside face 409 and 411, and it contacts with 415 with top layer inside face 413.In the laminated glass plate under being in pressure load; The inside face 109 of the glass board 101 in first outside face 405 on top layer and the first pair of glass board of this lamination contacts, and second outside face 407 on top layer contacts with the interior glass surface 111 of adjacent sheets of glass 103 simultaneously.The interior glass surface 219 of the glass board 103 in first outside face 405 on top layer and the second pair of glass board of this lamination contacts, and second outside face 407 on top layer contacts with the interior glass surface 221 of adjacent sheets of glass 217 simultaneously.Alternately arranging of thin polymer film and glass board continues in whole lamination.
The thin polymer film of Fig. 5 comprises a foam of polymers simple layer 501.This foam is processed by poly-vinyl, polystyrene, polypropylene or biaxial stretch-formed polypropylene.The foaming agent that is used for foaming can be identical with the employed foaming agent of foam of Fig. 2 preparation thin polymer film 200.Yet, when using BOPP to prepare foam, do not use foaming agent; But form foam through stretching.Foam has outside face 503 and 505.In the lamination under being in pressure load, the inside face 109 of the glass board 101 in first pair of glass board of first outside face 503 and this lamination contacts, and second outside face 505 contacts with the inside face 111 of adjacent sheets of glass 103 simultaneously.The inside face 219 of the glass board 103 in second pair of glass board of first outside face 503 and this lamination contacts, and second outside face 505 contacts with the inside face 221 of adjacent sheets of glass 217 simultaneously.Alternately arranging of thin polymer film and glass board continues in whole lamination.
Said thin polymer film has makes it be suitable for the character that the cover glass plate exempts from scratch.All films described herein have one or more following character.Thin polymer film can add or not add slip agent.If the use slip agent, then each surface of lubricating function or thin polymer film go up consumption of slip agent be 100ppm to 5000ppm, especially 500ppm is to 1000ppm.Slip agent can move out of poly-mer and appear at two outside faces of film (also promptly, from the outside face 503,505 of top layer outside face or froth bed 501, moving out).Each face of thin polymer film and the plane of inorganic glass materials have the low adhesive capacity of peeling off test less than 50g (for example from 0g to the highest 50g) according to following.The surface roughness Ra of each top layer outside face is greater than 0.5 micron, especially at 1.5 microns in 15 micrometer ranges.The Ra value is the center line average values of polymeric material at thin polymer film surface peak height.By comparison, the one side of known Visqueen film has 0.005 micron to 0.025 micron lower surface roughness Ra or polishing degree.The shape facility of stratum nucleare can be provided at lip-deep fluctuation to the top layer, and its size is much larger than the surface roughness Ra on top layer disclosed herein.For example, these fluctuations can be provided by the abscess of the foam in the thin polymer film 200 and 501 (Fig. 2 and Fig. 5), the stratum nucleare and the paper 400 (Fig. 4) of thin polymer film 300 (Fig. 3).The thickness of whole film can be for from 60 microns to 300 microns (for example, 60 microns to 120 microns).Top layer thickness separately can be 20 microns to 100 microns (for example, 20 microns to 40 microns), and the thickness of stratum nucleare can be 20 microns to 100 microns (for example, 20 microns to 40 microns).Advantageously select the thickness of thin film component (for example top layer and stratum nucleare) to make material have given stiffness, with suitable transportation and the packing device that has potential impact for the scratch degree with balance softness and hardness in various degree.The stiffness height that need not make thin polymer film be to itself can standing, because can use the transfer system clamping film with air pump and mechanical gripper when being loaded into film in the glass board lamination.
A function of thin polymer film be through catch and/or the particle (like chips of glass) on heat absorbing glass surface to the flexible uppermost layer of film to avoid scratch.When this scratch protective effect can appear at stack pressure with glass board and loads on the film.Particle can be submicron order or bigger dimensionally.Particle can be adsorbed by stratum nucleare equally.Slip agent moves out of poly-mer and appears at the outer surface layer of film, on two surfaces of this film, contacts with adjacent sheets of glass.Slip agent can make particle on the slip agent material rather than exposed slip on glass.Except that thin polymer film, between adjacent sheets of glass, do not need other material layer (yet promptly), but do not get rid of the situation that comprises other material at the layer that does not have paper and lamination on glass.
The cmpd that is suitable as slip agent comprises at least a long-chain fatty acid ester or fatty acid amide.Long-chain fatty acid ester of the present invention and fatty acid amide are the derivants of the saturated and unsaturated normal fatty acid (normal fatty acids) that contains 14 to 36 carbon atoms.Representational aliphatic acid has: for example tetradecanoic acid, pentadecanoic acid, hexadecanoic acid, Heptadecanoic acide, octadecanoid acid, nonadecylic acid, arachic acid, heneicosanoic acid, docosanoic acid, lignoceric acid, hyenic acid, tricosanic acid, hexacosoic acid, melissic acid, lacceroic acid, gheddic acid, myricinic acid, pentatriacontane acid, ceroplastic scid, myristic acid, palmitic acid, stearic acid, arachidic acid, mountain Yu acid, hexatrieisocontanoic (C
36) acid, oleic acid, palmitoleic acid, leukotrienes and cetoleic acid etc.
Preferred long chain fatty acids amides is as slip agent, and suitable slip agent can comprise one or more in following: unsaturated fatty acid monoamides (for example: oleamide, erucyl amide, recinoleamide); Saturated fatty acid monoamides (preferred lauramide, palmitamide, peanut acid amides, mountain Yu acid acid amides, stearmide, 12 hydroxyl stearmides); N-substituted fatty acid acid amides (for example: N-stearyl stearmide, N-mountain Yu base mountain Yu acid acid amides, N-stearyl mountain Yu acid acid amides, N-mountain Yu base stearmide, N-oil base oleamide, N-oil base stearmide, N-stearyl oleamide, N-stearyl erucyl amide, erucyl erucyl amide, erucyl stearamide, stearyl erucyl amide, N-oil base palmitamide); Methylol amide (for example: methylol stearmide, methylol mountain Yu acid acid amides); Unsaturated fatty acid bisamide (for example: the two oleamide of vinyl, the two oleamide of hexylidene, N, N '-two oil base adipamide, the two oleamide of ethylene, N, N '-two oil base decanedioyl amine); Saturated or unsaturated fatty acid four acid amides and saturated fatty acid diamides (methene distearyl acid amides, ethylene bis stearamide, ethylene isostearoyl amine, ethylene hydroxyl stearmide, ethylene bis stearamide, ethylene mountain Yu acid acid amides, hexylidene distearyl acid amides, hexylidene two mountain Yu acid acid amides, hexylidene dihydroxyl stearmide, N; N '-distearyl adipamide, N, N '-distearyl decanedioyl amine).
The specific long chain fatty acids amides that possibly be suitable for is erucyl amide, stearmide, oleamide and mountain Yu acid acid amides.Fatty acid amide can be buied and comprises like Kemamide S (stearmide), Kemamide U (oleamide), Kemamide E (erucyl amide) from Humko Chemical Company.In addition, fatty acid amide can also be buied and comprises like: Crodamide OR (oleamide), Crodamide ER (erucyl amide), Crodamide SR (stearmide), Crodamide BR (mountain Yu acid acid amides) from Croda Universal Ltd..
The slip agent of film surface prevents transportable low molecular organic component in the fluoropolymer resin, the potential source that this low molecular organic component possibly be an organic contaminant as barrier layere.Any slip agent of existence on glass uses known washing methods in accomplishing operation---a kind of potassium hydroxide purging medium) etc. comprise that brush, super sonic, Water-and mist-spraying and pH are as the purging medium of 10-12 (for example: wash off.
Slip agent can directly join in the poly-vinyl resin with powder type or be mixed into masterbatch and join then in the whole poly-vinyl batch of material.Thin polymer film can prepare through this technical field known curtain coating or film blowing method.In casting method, film is expressed into and is delivered to then on the chill roll and can provides on the rubber nip rolls of proper surface roughness Ra to poly-mer.
The method of the peel test that this paper mentions is described below.Uncoated glass sample is placed on the clean running surface.Glass sample cleans up.With do not stain and do not touch 5 " x5 " and film sample place on glass on the roller of 10 pounds (about 4.5kg) two roller journeys of pressure.Instrument is included in a specimen holder, a pulling strengrth tester on the TA.XT fabric analysis appearance platform.Universal-joint is connected on the arm of fabric analysis appearance, hangs with S type hook on it.
double faced adhesive tape is affixed on one 0.25 " thick, 4 " four edges of square aluminium dish.This dish uses four eye hooks (eyehook) of Pan Jiao to get up with the suspension of S type hook through fishing line.Dish aligns with carriage and is reduced to about 1mm place, sample surfaces top.Glass/the film sample of preparation is placed on dish below centre.Dish is reduced to glass and film top.Four edges of film are fixed on the double faced adhesive tape on the dish, guarantee that contact is good.Sample slides in the support and glass is adjacent to platform.The size of this measurement device power when dish draws high with the speed of 0.2 mm/second.Plate must be put down during end of run.Measurement is pulled away from the needed power of glass with film, and is recorded as peel value, with the gram expression.
The present invention will describe through following embodiment, and these embodiment should not be construed as limiting the defined the present invention of claim in order to illustrate.
Embodiment 1
Contrasted and the contacted glass surface of a thin polymer film that is adsorbed with erucyl amide (" SL thin polymer film "), the glass surface that contact with clean glass paper and glass surface (promptly Visqueen/ paper/Visqueen system leaves through peel manually and removes in this film) with Visqueen film.The polymer thin membrane sample comprises three subgrades, and one is the medium density polyethylene stratum nucleare at center.Stratum nucleare is made by foam.Two low density polyethylene (LDPE) skins are clamped stratum nucleare.Overall film thickness is about 110 microns to 120 microns.The amount that the top layer is prepared into erucyl amide is 500ppm.This is the thin polymer film 200 shown in Fig. 2, and has elastic tensile modulus as herein described, surface roughness Ra and peel value.The glass board of 100 Generation 8 sizes of every kind of sandwich type is contained in respectively in the different crates, is loaded into then to accomplish in the operation.Sample 1 carries out in different weeks with sample 2.The result is listed in the table below in 1.
Measure defective through following method: make flash light impinge upon on glass and use smear camera to confirm defective locations.Controlled output is defined as the percentum that accounts for institute's tested glass plate sum through the glass board of quality loop.
Table 1
Minimum defects count and peak offtake are used and are manually peeled off Visqueen film and thin polymer film acquisition, and minimum output is to use clean glass paper.
Embodiment 2
100 glass sheets (Generation 5.5) were opened packing in 200 minutes with glass paper, Visqueen film and thin polymer film respectively.Polymer sheet 200 has peel value as herein described, stiffness and surface roughness Ra.Then glass is sealed off and cleaned.Surface deficiency is measured according to embodiment 1 described method.The result is as shown in table 2 below.
Table 2
| Glass paper | The Visqueen film | Thin polymer film | |
| Controlled output | 0％ | 100％ | 91％ |
| Defects count | 1640 | 8 | 10 |
Can find out in the table 2 that polymer sheet 200 compares with glass paper extraordinary output and low defects count are arranged, and suitable with the Visqueen material.
In view of above-mentioned open, content many changes of the present invention and variation are conspicuous to those skilled in the art.Therefore, it is understandable that within the scope of the appended claims, the present invention also can adopt and be different from the method enforcement of specifically showing and describing.
Claims (21)
1. a cover glass plate avoids the method for scratch and pollutants, comprising:
A thin polymer film is placed on the described glass board, and wherein said thin polymer film has first and second surface and described first surface to contact with a main surface of described glass board; And
Make a main surface of described another glass board contact near described thin polymer film another said glass board with described second surface,
Wherein said first surface and second surface with respect to the peel value of said glass board all less than 50g and surface roughness Ra all greater than 0.5 micron.
2. the process of claim 1 wherein two polymeric surface layers that described thin polymer film comprises a foam of polymers center stratum nucleare and clamps this stratum nucleare, and described stratum nucleare and top layer are integrally formed mutually.
3. the method for claim 2, wherein said foam stratum nucleare comprise and are of a size of 0.5 micron to 20.0 microns abscess.
4. the method for claim 3, described stratum nucleare is made by middle density or high density polyethylene (HDPE), and described top layer is made by low density polyethylene (LDPE), linear low density polyethylene or ldpe copolymer.
5. the method for each during aforesaid right requires; Two polymeric surface layers that wherein said thin polymer film comprises a center stratum nucleare and clamps said stratum nucleare; Described stratum nucleare has the stiffness that is showed by its poly-mer; The elastic tensile modulus of said poly-mer is greater than 80kpsi, and described stratum nucleare and top layer are integrally formed mutually.
6. the method for claim 5, wherein said stratum nucleare is made by polyethylene terephthalate, polystyrene or polypropylene, and described top layer is made by low density polyethylene (LDPE), linear low density polyethylene or ldpe copolymer.
7. aforesaid right requires each the method in 1 to 4, and wherein said thin polymer film comprises a paper center stratum nucleare and two polymeric surface layers clamping this stratum nucleare, and described stratum nucleare and described top layer are integrally formed mutually.
8. the method for claim 7, described top layer is processed by low density polyethylene (LDPE), linear low density polyethylene or ldpe copolymer.
9. the method for claim 1, described thin polymer film comprises a foam of polymers simple layer that is made by poly-vinyl, polypropylene, polystyrene or biaxial stretch-formed polypropylene.
10. the method for claim 9, described foam stratum nucleare comprise and are of a size of 0.5 micron to 20.0 microns abscess.
Any one method during 11. aforesaid right requires; Comprise: repeat to place said thin polymer film and place the step of another said glass board, up to being formed on a folded said glass board that has said thin polymer film between the adjacent said glass board near it.
Any one method during 12. aforesaid right requires, wherein said first comprises a kind of long-chain fatty acid ester or a kind of long chain fatty acids amides slip agent with second surface.
13. the method for claim 12, the wherein said slip agent amount with 100 to 5000ppm on said first surface and said second surface exists.
14. the method for claim 13, wherein said slip agent are erucyl amide.
15. aforesaid right requires each method, wherein said thin polymer film gross thickness is about 60 microns to 300 microns.
16. the method for claim 15; Wherein said thin polymer film comprises a centre polymer stratum nucleare and two polymeric surface layers clamping this stratum nucleare; Described stratum nucleare and described top layer are integrally formed mutually; The elastic tensile modulus of the said poly-mer on said top layer is 20 to 80kpsi, and the elastic tensile modulus of the said poly-mer of said stratum nucleare is 80kpsi at least.
17. the method for claim 16, wherein the thickness on each said top layer is about 20 microns to 100 microns.
18. the method for claim 16 or 17, the thickness of wherein said stratum nucleare are about 20 microns to 100 microns.
19. the method for each that aforesaid right requires, wherein said surface roughness Ra is 1.5 microns to 15 microns.
20. the method for each that aforesaid right requires, said first of wherein said thin polymer film is the surface roughness Ra of the size fluctuation of its existence much larger than said thin polymer film with second surface characteristics.
21. the method for claim 12, wherein said slip agent is used to prevent that as barrier layere the component in the said top layer from staiing said glass board.
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| CN201710073574.5A CN107053796A (en) | 2009-07-10 | 2010-07-09 | Thin polymer film for protective glass plate |
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| US22458409P | 2009-07-10 | 2009-07-10 | |
| US61/224,584 | 2009-07-10 | ||
| PCT/US2010/041466 WO2011006031A2 (en) | 2009-07-10 | 2010-07-09 | Polymer film for protecting glass sheets |
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| JP (1) | JP5723877B2 (en) |
| KR (1) | KR101819758B1 (en) |
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| JP2015061808A (en) * | 2012-12-21 | 2015-04-02 | 日本電気硝子株式会社 | Strengthened glass, strengthened glass plate, strengthened glass container, and glass for strengthening |
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| CN111708189A (en) * | 2019-03-18 | 2020-09-25 | 三星显示有限公司 | Pallet module and pallet assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201114604A (en) | 2011-05-01 |
| JP5723877B2 (en) | 2015-05-27 |
| JP2012532806A (en) | 2012-12-20 |
| WO2011006031A3 (en) | 2011-03-03 |
| WO2011006031A2 (en) | 2011-01-13 |
| CN107053796A (en) | 2017-08-18 |
| TWI494227B (en) | 2015-08-01 |
| KR20120089233A (en) | 2012-08-09 |
| KR101819758B1 (en) | 2018-01-17 |
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Application publication date: 20120718 |