KR102041046B1 - Film for lsminating glasses, lsminated glasses comprising of the ssme, manudacturing method for the ssme - Google Patents

Abstract

The present invention relates to a film for laminated glass and a manufacturing method thereof. The film for laminated glass comprises an uneven surface shape on at least a part of or the entire one surface of the film. The uneven surface shape comprises a plurality of convex parts and a concave part which is located between neighboring convex parts. A line starting from a point (a starting point, Ps), where one end portion of the uneven surface shape is in contact with the concave part, and drawn along with the concave part is continued to a point, as a point (a terminating point, Pe) same as or different from the starting point, where an end portion of the uneven surface shape is in contact with the concave part. The film for laminated glass has no interference between diffractions in spite of having a pattern on a surface thereof, and is excellent in terms of degassing performances and boundary sealing functions and the like.

Description

Laminated glass film, laminated glass comprising same and manufacturing method thereof {FILM FOR LSMINATING GLASSES, LSMINATED GLASSES COMPRISING OF THE SSME, MANUDACTURING METHOD FOR THE SSME}

The present invention relates to a film for laminated glass, a laminated glass comprising the same, and a method for manufacturing the same, and a film for laminated glass having excellent degassing performance and hardly generating diffraction interference fringes by an embossed pattern.

Polyvinyl acetal is used as an interlayer of laminated glass (safety glass) or a light transmissive laminate (film for laminated glass). Laminated glass is mainly used for building windows, exterior materials, and automobile window glass, and when broken, the debris does not scatter and does not allow penetration even when hit by a certain strength. Loss can be secured to minimize damage or injury.

The interlayer for laminated glass has a number of fine layers for improving blocking prevention between the interlayers on the surface, handling workability (slidability with the glass plate) when laminating the glass plate and the intermediate layer, and degassing during lamination processing with the glass plate. Emboss is formed.

When the interlayer for laminated glass with embossing is used as the interlayer for laminated glass, there is a possibility that interference patterns or bubbles may occur in the laminated glass due to the influence of the emboss located on both sides of the interlayer, and the visibility is deteriorated. have.

Korean Patent Publication No. 10-2017-0066279, Publication Date: June 14, 2017, Interlayer film for laminated glass, Rolled body, Plywood glass, Manufacturing method of interlayer film for laminated glass, and Manufacturing method of rolled body Korean Patent Publication No. 10-2017-0069176, Publication Date: June 20, 2017, Interlayer film and laminated glass for laminated glass

An object of the present invention is to provide a film for laminated glass, etc., which is excellent in degassing performance and hardly generates diffraction interference fringes by an embossed pattern.

In order to achieve the above object, the film for laminated glass according to an embodiment of the present invention includes a surface irregularities located on at least part or all of one surface of the film, the surface irregularities are adjacent to each other with a plurality of convex portions And a concave portion positioned between the convex portions, wherein the surface concave-convex shape includes a first convex portion surrounded by the concave portion and not including a concave portion therein, wherein the first convex portion is the first convex portion. And a line connecting the portion where the recess is in contact with each other is a triangle, a pentagon, a hexagon, a hexagon, or an octagon of polygonal shape, and starts at one point (start point, Ps) at which one end of the surface irregularities is in contact with the recess. The line drawn along the portion is a point where the end and the concave portion of the surface unevenness are in contact with one another (end point, P) e) to be continued.

The laminated glass film may be a degassing performance evaluation value of 43 to 72 cmHg at 20 ℃.

The degassing performance evaluation value at 40 ° C of the laminated glass film may be maintained at 80% or more of the degassing performance evaluation value at 20 ° C of the laminated glass film.

The laminated glass film may have a number of edge bubbles less than 30.

The laminated glass film may have an average area of the convex portion measured in the unit area (1 cm ² ) of 0.1 to 1.5 mm ² .

The laminated glass film may have a roughness of 35 to 52.

The laminated glass film may have a haze value of 10% or less.

The film for laminated glass of the present invention and a method for producing the same have almost no diffraction interference fringes generated by the embossed pattern even though the film has a pattern on the surface, and is excellent in degassing performance, edge sealing function, and the like.

1 and 2 are conceptual views illustrating the surface irregularities of the film for laminated glass produced according to an embodiment of the present invention, respectively.
3 is a conceptual diagram illustrating a cross section of a film for laminated glass prepared according to one embodiment of the present invention.
Figure 4 is a real picture of the shape of the uneven portion of the uneven shape transfer device applied in one embodiment of the present invention (black line portion protruding portion).

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Like parts are designated by like reference numerals throughout the specification.

As used herein, the terms "about", "substantially", and the like, are used at, or in close proximity to, numerical values when manufacturing and material tolerances inherent in the meanings indicated are intended to aid the understanding of the invention. Accurate or absolute figures are used to assist in the prevention of unfair use by unscrupulous infringers.

Throughout this specification, the term "combination of these" included in the expression of the makushi form means one or more mixtures or combinations selected from the group consisting of constituents described in the expression of the makushi form, wherein the constituents It means to include one or more selected from the group consisting of.

Throughout this specification, description of "A and / or B" means "A, B, or A and B".

Throughout this specification, terms such as “first”, “second” or “A”, “B” are used to distinguish the same terms from each other unless otherwise specified.

As used herein, B on A means that B is positioned on A while B is directly in contact with A or another layer is in between, while B is on a surface of A It is limited to doing so and is not interpreted.

In the present specification, the singular forms “a,” “an” and “the” are intended to be interpreted in the context of the singular or plural forms unless the context describes them.

In the present specification, a polygon refers to a two-dimensional figure having three or more sides, and includes a triangle, a square, a pentagon, a hexagon, and the like, and includes a curved form such as a circle, an ellipse, etc. having infinite sides in all or part of the polygon. It also includes.

The inventors of the present invention, when a pattern of a pattern is formed on one side and the other side of the film is generated an optical interference phenomenon, the optical properties of the laminated glass film worsens, in order to avoid such a phenomenon irregular points on one side and the other side of the film During the study to solve the problem that the degassing performance may be reduced by applying the method to the method, applying an irregular shape having a pattern in which concave lines are connected between convex portions using an atypical linear pattern, optical interference phenomenon, The present invention was completed by confirming that all of the conflicting physical properties required for the laminated glass film having the embossing pattern such as degassing performance were simultaneously satisfied.

1 and 2 are conceptual views illustrating the surface irregularities of the film for laminated glass prepared according to an embodiment of the present invention, respectively, Figure 3 is a cross section of the film for laminated glass prepared according to an embodiment of the present invention 4 is a conceptual view illustrating a partial photograph of a concave-convex shape of a concave-convex transfer device applied in an embodiment of the present invention (a black line is a protrusion). Hereinafter, the present invention will be described in detail with reference to FIGS. 1 to 4.

Laminated glass film 600 according to an embodiment of the present invention includes a surface concave-convex shape 500 is located on at least part or all of one surface of the film 600, the surface concave-convex shape 500 And a concave portion 200 positioned between the convex portions 100 and the convex portions adjacent to each other, the concave portion starting at one point (starting point, Ps) in contact with one end of the concave-convex shape and the concave portion. The line drawn along the portion is characterized in that the end of the surface concave-convex shape and the concave portion are in contact with each other. That is, the laminated glass film 600 is connected to the recess 200 without disconnection from the start point Ps to the end point Pe. The concave portion 200 having such a feature serves as a way through which air escapes in a process such as temporary bonding thereafter and provides excellent degassing performance.

The line from the start point Ps to the end point Pe has two or more break points. In addition, the bending point may be a point where two or three or more recesses where the direction of the recess center line is different from each other meet each other. As described above, there are two or more lines extending from the start point to the end point where several center lines meet each other, and these lines are connected to each other to form a concave portion 200 pattern. Unlike the grid pattern or the checkered pattern, the net form is not a form in which straight lines intersect, but a form in which lines having a plurality of break points cross each other. That is, the concave portion of the surface irregularities pattern to be applied in the present invention is distinguished from the lattice pattern or the checkered pattern. The bent points may form an irregular pattern, so that the optical distortion caused by the regular pattern does not occur. Do not.

In addition, the recess pattern included in the unit area cm ² of the surface irregularities may have a shape different from the recess pattern included in the unit area adjacent to the recess pattern. That is, since the concave patterns adjacent to each other are formed in an irregular pattern instead of a repetitive regular pattern, the surface irregularities do not cause optical distortion even when one surface and the other surface of the film are formed, respectively.

The laminated glass film 600 includes a first surface concave-convex shape 500 including at least one convex portion 100 and a concave portion 200 positioned between the convex portions adjacent to each other. The other surface of the film includes a plurality of convex portions 100 and a second surface concave-convex shape 500 including a concave portion 200 positioned between the convex portions adjacent to each other.

Between the first concave-convex portion of the first surface concave-convex shape located within a unit area (1 cm ² ) of the film 600 and the second concave-convex portion of the second surface concave-convex shape positioned close to the first concave portion. The distance value d1 is different from the distance value d2 between the third concave portion of the first surface concave-convex shape and the fourth concave portion of the second surface concave-convex shape located close to the third concave portion ( 1 and 2). Thus, when the values of d1 and d2 are different from each other, optical distortion due to an interference phenomenon does not occur, and a film for glass bonding having an embossed pattern and having excellent optical characteristics can be provided.

Specifically, each of the d1 and d2 may have a value of 2.5 mm or less, and may have a value of 0.002 to 2.2 mm. When the d1 and d2 values in the above range, an embossed pattern may be formed to satisfy both degassing performance and sealing performance.

The average depth Wh of the concave portion 200 included in the first surface irregularities 500 may be 10% or less, 9% or less, or 6% or less of the entire thickness of the film. In addition, the average depth of the concave portion may be 0.2 to 6% of the overall thickness of the film, may be 0.5 to 4%.

When the concave portion 200 is formed at such a depth, a concave portion having excellent degassing performance may be formed. However, when the average depth of the concave portion is too large, the pattern does not disappear according to the bonding conditions in the present bonding process, bubbles may be formed at the edges or the uneven shape may be left in the above range.

Specifically, the average depth Wh of the concave portion may be 80 μm or less, 70 μm or less, or 60 μm or less. In addition, the average depth Wh of the recess may be 3 to 55 μm, and may be 5 to 45 μm.

The depth Wh of the concave portion means the length from the imaginary surface extending from the convex portion 100 to the bottom of the concave portion.

In this case, there is a sufficient height difference so that the surface concave-convex shape is maintained without disappearing even in the temporary bonding process during the glass bonding process, and may have sufficient degassing performance.

The recess may have an average width Wc of 2 to 120 μm, and may be 10 to 70 μm. The width Wc of the concave portion means a width of the concave portion in an imaginary surface extending from the convex portion 100.

The distance value between the recessed part A contained in the arbitrary unit area (1 cm <^2> ) of one surface of the said laminated glass films 600, and the said recessed part A and the recessed part B which adjoins is the said recessed part B of the said surface, and said The distance value between the recess B and the neighboring recess C may be different from each other.

In addition, the distance value between the recessed part A and the recessed part A and the recessed part B which adjoin in arbitrary unit areas (1 cm <^2> ) of the other surface of the said laminated glass film 600 is the recessed part B of the said other surface. And a distance value between the recess B and the neighboring recess C may be different from each other.

The cross-sectional shape of the concave portion 200 may be generally rectangular, semi-circular, inverted triangle, or the like, and the concave shape is not particularly limited in shape.

The shape of the recess of the first surface irregularities and the shape of the recess of the second surface irregularities positioned in the unit area (1 cm ² ) of the film may be different from each other (see FIG. 2).

The concave portion 200 serves as a passage through which air passes in the joining process, and is not completely lost even after temporary bonding, and a portion of the concave portion is maintained to have excellent degassing performance.

In addition, the concave portion 200 is formed to have a value within a predetermined range as a whole, so that the shape does not have a regular pattern can produce a glass bonding film having optically excellent properties.

The surface concave-convex shape 500 includes a concave portion 200 and a plurality of convex portions 100 formed as a boundary of the concave portion 200.

The convex portion 100 is surrounded by the concave portion 200.

In the first convex portion 110 surrounded by the concave portion 200, a line between the first convex portion 110 and the concave portion 200 may form a single closed curve.

The first convex portion 110 surrounded by the concave portion 200 may have a polygonal shape in which a line connecting the portion where the first convex portion 110 and the concave portion 200 are in contact with each other.

The polygons may be triangular, square, pentagonal, hexagonal, hexagonal or octagonal, and they may be mixed. The polygon means a substantially polygonal shape, and the concave-convex portion and the first convex portion are formed by pressing a concave-convex forming transfer device such as a plate (or roller) onto a film to form the concave-convex shape. The line that 110 is in contact with may not necessarily be a straight line, but may have a portion that appears to be a curve.

The angle at the vertex of the polygon may be greater than 40 º and less than 180 º.

The angle at the vertex means the angle at one point where a line connecting the adjacent convex portion 100 and the concave portion 200 meet each other, and specifically, the angle may be 45 º to 160 º. have.

The first convex portion 110 which is located in the concave-convex shape 500 and is surrounded by the concave portion 200 but does not include the concave portion therein, has a portion of the concave portion 200. To seven adjacent convex portions and may be adjacent to each other.

In this case, the first convex portion 110 and the adjacent convex portions may have different shapes, and may have different areas. As such, when the first convex portion and the adjacent convex portions are different in shape, the irregular concave and convex shapes of the polygon may be formed while the size of the polygon is within the predetermined range but not the same.

The convex portion 100 may have an average area of 0.01 mm ² to 4.00 mm ² .

The average area is based on the area of the convex portion evaluated based on the unit area (1 cm ² ) of the surface irregularities 500 of the laminated glass film 600.

Specifically, the average area of the convex portion 100 may be 0.05 mm ² to 4.50 mm ² , and 0.1 mm ² to 4.50 mm ² . More specifically, the surface concave-convex shape 500 of the laminated glass film 600 may have a low area shape with an average area of the convex portion 100 of 0.1 mm ² to 0.5 mm ² , and an average area of more than 0.5 mm ^2. It may be a medium area type of 0.9 mm ² or less, may be a large area type having an average area of more than 0.9 mm ^{2 and} 1.5 mm ² or less, and a super area type having an average area of more than 1.5 mm ^{2 and} 4.00 mm ² or less.

In addition, the surface irregularities 500 may include 24 to 9,800 pieces of the convex portion 100 per unit area (1 cm ² ).

The surface concave-convex shape 500 may have a standard deviation of an area of the convex portion located within a unit area (1 cm ² ) of 0.01 to 0.4, or 0.05 to 0.35.

When the convex portion 100 is a low area type, the standard deviation of the convex portion area may be 0.01 to 0.1, and when the convex portion 100 is a medium area type, the standard deviation of the convex portion area may be 0.1 to 0.2. In addition, when the convex portion 100 is a large area type or a large area type, the standard deviation of the convex portion area may be 0.2 to 0.3.

When the standard deviation of the area of the convex portion has such a range, the convex portions 100 may be positioned in an irregular pattern throughout the surface irregularities 500 including the convex portion 100 having a relatively constant size, and the convex portion 100 may be relatively even. Can be distributed.

The surface roughness Rz of the surface irregularities 500 may be 30 to 70, 30 to 60, 32 to 50, and 35 to 45. With this roughness range, a sufficient end sealing effect can be obtained with good degassing performance.

The surface roughness is based on the measurement by the DIN EN 4287: 2010-7 method.

The laminated glass film 600 includes a plurality of convex portions 100 positioned on at least some or all of the other surfaces thereof, and a concave-convex shape 500 including concave portions positioned between the convex portions adjacent to each other. ) May be further included.

At this time, the shape of the convex portions included in any unit area (1 cm ² ) of one surface of the laminated glass film 600 is located at the unit area of the other surface of the laminated glass film 600 opposite to the one surface. The convex portions are characterized by different shapes.

Thus, the laminated glass film 600 is different in the shape of the convex portion 100 formed on the opposing portions of one surface and the other surface thereof, there is no regularity does not generate diffraction interference fringes and excellent optical characteristics. Specifically, the glass bonding film 600 may have a haze value of 10% or less and 5% or less.

In addition, the glass bonding film 600 has excellent degassing performance by the concave portions directly or indirectly connected to each other located between the convex portions, and also has excellent end sealing performance.

The film 600 for laminated glass thus formed may be laminated between a pair of glass 700 to form a laminated glass 900. The laminated glass 900 may be made of laminated glass by sequentially or simultaneously applying a temporary bonding process and a main bonding process.

In particular, in the temporary bonding process, the laminated glass film 600 may be disposed in the space between the glass and the film, and the air may be removed by the recesses 200 of the surface irregularities. The irregularities of the surface irregularities may cause irregular or no diffraction interference fringes.

Degassing performance evaluation value of the laminated glass film 500 can be maintained at 80% or more of the degassing performance evaluation value at 20 ℃ of the laminated glass film, can be maintained at 85% or more, 90% or more Can be maintained. In this case, despite the increase in temperature during the bonding process, the surface irregularities are not easily collapsed, thereby providing a film for laminated glass with significantly less defects such as bubbles or bubbles.

The laminated glass film 500 may have a degassing performance evaluation value of 20 to 43 to 72 cmHg, 55 to 72 cmHg, may be 63 to 71 cmHg.

The laminated glass film 500 may be a degassing performance evaluation value of 33 to 72 cmHg, 60 to 71 cmHg at 30 ° C.

The laminated glass film 500 may be a degassing performance evaluation value at 40 ℃ 28 to 72 cmHg, may be 55 to 69 cmHg.

When applying the laminated glass film 500 having a degassing performance evaluation value in this range, it is possible to degas even at a relatively high temperature during bonding can have excellent degassing performance.

The degassing performance evaluation value applies the vacuum ring test result value. For example, a film sample for laminated glass was prepared to have a diameter of 320 mm, and a laminate was prepared by placing it between circular glass plates, and then a vacuum ring device was installed and vacuumed to maintain the degree of vacuum after 30 seconds at each temperature. Degassing performance can be measured by measuring.

The laminated glass film 500 may have a number of edge bubbles less than 30, 15 or less. That is, the laminated glass film has an excellent edge sealing effect.

The bubble generation number is one of indices for evaluating edge sealing characteristics, and the number of bubble generations within 5 mm of the edge is evaluated as a number regardless of the area in the test sample (based on the 12 M edge length).

The laminated glass film 500 may include convex portions having an average area of 0.1 to 1.5 mm ² having a convex portion measured at a unit area (1 cm 2). In addition, the laminated glass film 500 may have a surface roughness of 35 to 52. In this range, the laminated glass film may have a haze value of 10% or less, and may have a low haze value of 5% or less, and thus may provide a film having excellent degassing and edge sealing properties at the same time with excellent optical properties. have.

Laminated glass film 600 according to another embodiment of the present invention is to include a surface irregularities 500 are located on at least part or all of one surface of the laminated glass film, the surface irregularities are a plurality of The convex portion 100 and the concave portion 200 positioned between the convex portions adjacent to each other.

The convex parts 100 included in the unit area 1 cm ² may have different shapes or areas.

The convex portions 100 included in the unit area (1 cm ² ) of the surface concave-convex shape 500 may have an area in which 80% or more of the convex portions satisfy an expression 1 below.

[Equation 1]

0.4 x Sm ≤ Sni ≤ 1.6 x Sm

In Equation 1, Sni is an area of the convex portion, and Sm is an average area of convex portions at the unit area where the convex portion is located.

Specifically, the convex portions 100 included in the unit area (1 cm ² ) of the surface concave-convex shape may be 90% or more of the convex portions satisfying Equation 1.

The glass bonding film 600 having the concave-convex shape 500 having the convex portion area condition is provided with convex portions 100 having different shapes or areas with the concave portion 200 interposed therebetween. The overall size of the parts is maintained within a certain range and at the same time has a surface irregularities 500 having an overall irregular shape, even if the surface irregularities 500 overlap without excellent diffraction interference pattern at the same time excellent degassing performance Can have

The line drawn along the concave portion 200 starting at one point (starting point) in which the one end of the surface concave-convex 500 and the concave portion 200 are in contact with the end of the surface concave-convex shape 500 and The concave portion 200 may be in contact with the same point as the starting point or another point (end point).

The convex part 100 may be surrounded by the concave part 200, and the description of the laminated glass film overlapping with that described in the embodiment of the present invention will not be repeated.

Hereinafter, the composition etc. of the film for laminated glass are demonstrated.

The laminated glass film may include a light transmissive first layer, and the first layer may be a polyvinyl acetal layer, an ironomer layer, a polyethylene terephthalate layer, or a polyimide layer.

The polyvinyl acetal layer may include a polyvinyl acetal resin and a plasticizer. Specifically, the polyvinyl acetal layer may include 60 to 76 wt% of a polyvinyl acetal resin, and may include 70 to 76 wt%. In this case, relatively high tensile strength and modulus can be imparted to the polyvinyl acetal layer.

The polyvinyl acetal resin may have an acetyl group content of less than 2 mol%, specifically, 0.01 to 2 mol%. The polyvinyl acetal resin may be a hydroxyl group content of 30 mol% or more, specifically 30 to 50 mol%,

The polyvinyl acetal resin may be a polyvinyl acetal resin obtained by acetalizing polyvinyl alcohol having a degree of polymerization of 1,600 to 3,000 with aldehyde, and a polyvinyl acetal resin obtained by acetalizing a polyvinyl alcohol having a degree of polymerization of 1,700 to 2,500 with aldehyde. Can be. When the polyvinyl acetal resin is applied, mechanical properties such as penetration resistance can be sufficiently improved.

The polyvinyl acetal resin may be synthesized polyvinyl alcohol and aldehyde, the aldehyde is not limited in kind. Specifically, the aldehyde may be any one selected from the group consisting of n-butyl aldehyde, isobutyl aldehyde, n-barrel aldehyde, 2-ethyl butyl aldehyde, n-hexyl aldehyde and blend resins thereof. When the aldehyde n-butyl aldehyde is applied, the manufactured polyvinyl acetal resin may have a refractive index characteristic of which the refractive index is less than that of the glass, and may have excellent bonding strength with glass or the like.

The polyvinyl acetal layer may include 24 to 40% by weight of the plasticizer, and may include 24 to 30% by weight. In the case of including the plasticizer in such a range, it is good in that it can impart proper bonding strength and impact resistance to the laminated film for bonding.

Examples of the plasticizer include triethylene glycol bis 2-ethylhexanoate (3G8), tetraethylene glycol diheptanoate (4G7), triethylene glycol bis 2-ethylbutyrate (3GH), triethylene glycol bis 2-heptanoate ( 3G7), dibutoxyethoxyethyl adipate (DBEA), butyl carbitol adipate (DBEEA), dibutyl sebacate (DBS), bis 2-hexyl adipate (DHA) and combinations thereof One may be applied and specifically selected from the group consisting of triethylene glycol di-2-ethyl butyrate, triethylene glycol di-2-ethylhexanoate, triethylene glycol di-n-heptanoate and combinations thereof It may include any one, more specifically triethylene glycol bis 2-ethylhexanoate (3G8) may be applied.

The polyvinyl acetal resin layer may have a glass transition temperature measured by a differential scanning calorimetry method of 15 to 25 ℃, specifically may have a characteristic of 17 to 20 ℃. In this case, excellent sound insulation properties can be exhibited at room temperature.

The ionomer is an inverted copolymer including an olefin repeat unit and a carboxylic acid repeat unit, and an ionic compound containing a metal ion in an acidic functional group may be applied.

Specifically, the ironomer may be an olefinic ionomer, and more specifically, a copolymer of a repeating unit derived from an alpha olefin having 2 to 4 carbon atoms and an alpha, beta ethylenically unsaturated carboxylic acid repeating unit having 3 to 6 carbon atoms. Can be. The ionomer may be an ionic compound containing a metal ion in the side chain having an acidic functional group.

The ionomer may include the olefinic repeating unit in an amount of 20 to 95% by weight, may include 20 to 90% by weight, may include 40 to 95% by weight, and include 40 to 75% by weight. can do. The carboxylic acid repeating unit may include 5 to 80% by weight, may include 10 to 80% by weight, may include 5 to 60% by weight, and may include 25 to 60% by weight. .

As the metal ion, monovalent, divalent or trivalent metal ions may be applied, specifically, Na ⁺ , K ⁺ , Li ⁺ , Cs ⁺ , Ag ⁺ , Hg ⁺ , Cu ⁺ , Be ²⁺ , Mg ^{2 +} , Ca ²⁺ , Sr ²⁺ , Ba ²⁺ , Cu ²⁺ , Cd ²⁺ , Hg ²⁺ , Pb ²⁺ , Fe ²⁺ , Co ²⁺ , Ni ²⁺ , Zn ²⁺ , Al ²⁺ , Sc ³⁺ , Fe ³⁺ , Al ³⁺ and Yt ³⁺ can be applied. Specifically, Mg ²⁺ , Na ⁺ and Zn ²⁺ may be applied as the metal ions.

The ionomer may be a copolymer of an ethylenic repeating unit having 2 to 4 carbon atoms and an ethylenically unsaturated carboxylic acid repeating unit having 3 to 6 carbon atoms, and includes an acidic side chain of 5 mol% or more, and the acidic side chain is the metal It may be an ionic compound capable of binding to ions.

The polyethylene terephthalate resin may have a crystallinity of 0% to 80%, 10% to 70%, and more specifically 40% to 60%. The polyethylene terephthalate resin may be a copolymer resin, but the copolymerized polyethylene terephthalate may be a copolymer of ethylene glycol and neopentyl glycol as a glycol component.

The polyimide resin is a resin prepared by imidizing a polyamic acid derivative by solution polymerization of an aromatic dianhydride and an aromatic diamine or an aromatic diisocyanate, and specifically, an aromatic acid dianhydride including biphenyltetracarboxylic dianhydride. It may be obtained by imidizing a polyamic acid resin synthesized from an aromatic diamine containing water and para-phenylene diamine, but is not limited thereto.

The laminated glass film 600 may have a structure in which the above-mentioned layers are stacked on each other, and specifically, may have a three-layer structure of a first layer, a second layer, and a first layer.

For example, a sound insulation layer may be applied to the second layer. When the sound insulation layer is a polyvinyl acetal resin layer, the polyvinyl acetal resin may include 54 to 76% by weight, may include 60 to 70% by weight, and may include 24 to 46% by weight of a plasticizer. To 40% by weight.

The polyvinyl acetal resin of the sound insulation layer may have an acetyl group content of 8 mol% or more, and specifically 8 to 30 mol%. In addition, the polyvinyl acetal resin of the sound insulation layer may have a hydroxyl content of 18 mol% or less, and may be 6 to 15 wt%. In this case, the sound insulation of the film may be further improved.

Method for manufacturing a laminated glass film 600 according to another embodiment of the present invention, including a plurality of non-protrusions 10 and the protrusions 20 connected to each other surrounding the non-projections, but the form The concave and convex portions of the concave-convex portion transferring device 1000 are applied to at least one surface of the film so that one surface of the convex portions adjacent to each other is formed in the convex portion 100 corresponding to the shape of the concave-convex shape transfer device 1000. And a surface concave-convex shape 500 including a concave portion 200 positioned therebetween, starting at one point (starting point, Ps) in contact with one end of the concave-convex shape 500 and the concave portion. The line is drawn along, the transfer step for producing a film for laminated glass, characterized in that the end of the surface concave-convex shape 500 and the concave portion is connected to the same or different point (end point, Pe) to the starting point. Po; The.

The surface concave-convex shape 500 includes a plurality of convex portions 100 and a concave portion 200 positioned between the convex portions adjacent to each other on part or all of one surface of the film.

The convex portion 100 may have a shape surrounded by the concave portion 200.

Before the transfer step may further comprise a film manufacturing step of producing a film for laminated glass by applying a polymer resin and a plasticizer. Since the content of the polymer resin and the plasticizer are overlapped with those described above, the description thereof is omitted. In addition, the film manufacturing step for laminated glass can be applied as long as it is a method for producing a film, for example, a coextrusion method can be applied.

The uneven transfer apparatus 1000 may be in the form of a roll or plate, the shape is not limited.

The transfer may be performed at a temperature condition of 30 to 150 ℃.

When a roll form is applied to the uneven transfer device 100, the transfer may be performed at a line pressure of 20 N / mm to 100 N / mm.

When the transfer is performed in such a temperature and pressure range, the film 600 having excellent degassing performance and end sealing performance can be produced.

A design process of the uneven transfer apparatus 1000 will be described.

A number of points corresponding to the number of convex portions to be formed on a reference plane of a constant size are formed. The points are randomly generated without a constant pattern at their positions and intervals. If the distance between neighboring points is smaller than a preset value, the points are deleted irregularly and added if the distance is larger than the preset value. Shape the reference point (the process of forming the reference point).

Form an outline (first outline), which is a vertical bisecting line of imaginary lines connecting neighboring reference points, and ends the outline (first outline) at a point where it meets an outline (second outline) formed between other reference points. (Outline drawing process).

When the outlines fill the reference plane, the protrusions 20 may be formed by giving a predetermined thickness to the reference planes based on the outlines, and include an uneven shape having a plurality of non-projections 10 surrounded by the protrusions. A shape transfer device is manufactured (transfer device forming step).

The non-projection portion 10 may have an average area of 0.01 mm ² to 4.00 mm ² , and the non-projection portion 10 may have a polygonal shape surrounded by the protrusion portion 20. It is different from neighboring neighbors.

The uneven transfer apparatus 1000 is transferred to one surface of the film by the method described above, and forms a film 600 for laminated glass including the convex portion 100 and the concave portion 200.

Hereinafter, the embodiment of the present invention will be described in more detail.

1) Uneven pattern design and embossed pattern

Arrange 810,000 points irregularly on a unit plane of 45 cm in width and length, and draw a solid line perpendicular to an imaginary line connecting neighboring points, and the solid line draws up to a position where it contacts with any other solid line. The pattern was designed in the manner. At this time, the irregular means that the distance between each point is not constant.

Specifically, if 810,000 points are arbitrarily positioned on the unit plane, and the distance between neighboring points is smaller than a preset value, the point is deleted. If the distance is larger than the preset value, the point is irregularly added. The placed reference point was created. The points thus formed draw about 810,000 polygons in the manner described above, such as by drawing a solid line perpendicular to the line of the summation that connects the neighboring points, and the completed pattern is convex in the solid line and concave in the area of the polygon. An embossed plate having a first pattern was used, the depth of which was 40 m, and the width of the convex solid line part was applied to about 50 m. The appearance of the embossed plate produced is as shown in FIG. However, the warrior proceeded after the sanding process.

The pattern is formed in the same manner as above, but the embossing plate having the second pattern and the 400,000 points are positioned in such a manner that about 1.4 million points are irregularly placed on a unit plane of 45 cm in width and length. An embossed plate having three patterns was produced, respectively.

When evaluated on the basis of the embossed plate having the first pattern, the shape of the convex part, which is a solid line surrounding the polygon, includes about 225 polygons per unit area (1 cm ² ) of 1 cm in width and length, and the shape of the uneven line or the intersection point is different. It was confirmed that it was not observed.

2) Transfer of embossed pattern to film

The pattern was transferred to both surfaces of the polyvinyl butyral film (made by SKC) using the embossed plate which has the 1st pattern manufactured above. At this time, the transfer (LSminating) to the case where the case of 5 minutes at 90 ℃ for the sample film 1, the case of 5 minutes at 80 ℃ to the sample film 2, and the case of 5 minutes to 70 ℃ to the sample film 3 Samples were prepared, and the following experiments were conducted using them.

The polyvinyl butyral film is a single layer film extruded by adding 73% by weight of polyvinyl butyral resin and 27% by weight of a plasticizer, and a film having the same composition as the skin layer, and a polyvinyl butyral resin as a core layer at the center. 63 wt% and 37 wt% of a plasticizer were added to prepare a three-layer sound insulation film prepared by co-extrusion, respectively, and applied to the experiment.

3) Evaluation of surface roughness

Surface roughness was measured according to DIN EN 4287: 2010-7. As a result, it was confirmed that sample film 1 had a roughness Rz of 37 to 45 μm, sample film 2 to 40 to 48 μm, and sample film 3 to 34 to 40 μm.

4) Evaluate area of convex part, width and depth of concave part

The area of the convex part was evaluated by the following method.

After photographing the surface of the prepared sample film using an optical microscope, a unit area was selected, and a drawing for calculating area was created by forming a line between the convex and concave portions included in the unit area (FIG. 1). Reference). In this figure, the total area of the convex portions was evaluated, and the values of the convex portion obtained by averaging 10 or more different portions as samples were averaged to be the convex portion values of each sample.

As a result of the measurement, the sample film 1 had an average area value of about 0.5 mm ² and the standard deviation of the area distribution was about 0.13. The sample film 2 had an average area value of about 0.3 mm ² and a standard area distribution. The deviation was estimated to be about 0.07, and the sample film 3 was evaluated to have an average area value of the convex portion of about 1 mm ² and a standard deviation of the area distribution of about 0.25.

The width and depth of the recess were evaluated as follows.

The cross section of the sample film was observed using an optical microscope, and the depth and width of the recesses were measured. The depth and width of the recesses in the cross section of 1 cm were measured, but the average values were defined as the widths and depths of the recesses after observing at 10 or more cross sections of different portions of the sample. The width of the recess was 40 to 55 μm and the depth was 30 to 45 μm based on the sample film 2. In addition, it was confirmed that the concave portions were connected to each other so that disconnection did not occur, and the shape of the intersection portion of the solid line was also good.

5) Evaluation of Degassing Performance

Degassing performance was carried out by an evaluation method using a vacuum ring device.

Specifically, the sample films (320 mm in diameter) were sandwiched between circular glass plates, and a laminate was manufactured. After the vacuum ring device was installed on the laminate, the inside of the degassing performance measuring device was evacuated using a vacuum pump. .

Degassing performance was measured by changing the temperature of the laminate in a sufficiently evacuated state and checking whether the degree of vacuum was maintained. This applies to the principle that the degree of vacuum drops when the pattern formed on the sample film collapses, and the pressure at which the vacuum degree is maintained at 20 ° C., 30 ° C. and 40 ° C. for each temperature is measured 30 seconds after each temperature is reached. It is shown in Table 1 below. The samples all showed good degassing performance.

Sample number Degassing performance (20 ℃, cm Hg) Degassing performance (30 ℃, cm Hg) Degassing performance (40 ℃, cm Hg) Sample Film 1 67 65 60 Sample Film 2 70 70 66 Sample Film 3 59 38 30

6) Edge sealing evaluation

If the edge sealing is not sufficient during the preliminary joining process, bubbles are generated at the edges, which causes a defect. After preliminary bonding, edge sealing quality was evaluated by the presence of bubbles at the edge and the number of bubbles.

Specifically, three samples were prepared by bonding the sample films between two sheets of 2.1 cm flat glass. Each of the samples was 1000 mm in length and length, and the edge slope of one sample was 4 m in total, and each of three samples was prepared to evaluate edge sealing at 12 m in total. Sample preparation was applied by main bonding at 110 ℃ for 15 minutes after degassing using a vacuum ring at 20 ℃ for 5 minutes.

Visually, the degree of edge sealing was evaluated by displaying the number of bubbles generated within 5 mm from the edge, and the total sum of the number of bubble occurrences was evaluated by performing two replicates (first evaluation and second evaluation) (Table 2). .

Sample number 1st evaluation Secondary evaluation Comprehensive Evaluation Sample Film 1 5 6 11 Sample Film 2 0 One One Sample Film 3 8 9 17

Referring to Table 2, all of the above samples were confirmed that less than 30 bubbles occurred, and showed excellent characteristics as a whole, in particular, in the case of Sample 2, it was evaluated that substantially no bubbles occurred with one or less bubbles. .

7) Penetration Assessment

The penetration resistance of the laminated glass was evaluated based on KS L 2007.

2.1 mm thick glass of 300 mm × 300 mm and sample films 1 to 3 above are applied to form a laminated structure of film-glass for glass-bonded glass, and are pre-bonded by vacuum to degas and edge sealing. It was. Thereafter, the specimens were prepared by main bonding at 150 ° C. for 2 hours using an autoclave. Thereafter, a steel ball of 2.26 kg was dropped on the specimen, and the height (MBH) through which the specimen was penetrated was measured. At this time, the case of penetrating at a height of less than 4 m was evaluated as a fail, and the case of penetrating at a height of 4 m or more was evaluated as a pass.

The laminated glass prepared by applying each of the sample films 1 to 3 was evaluated as Pass.

8) Impact resistance evaluation

Based on KS L 2007: 2008, the presence or absence of missing glass in the impact resistance evaluation was evaluated.

The process of manufacturing and bonding the laminated structure of the film-glass for glass-bonded glass by applying 2.1 cm thick glass and the sample films 1 to 3, respectively, proceeded in the same manner as the above penetration resistance evaluation.

The low temperature evaluation is a failure of 227 g of steel balls at a temperature of minus 20 ° C for 4 hours and then dropping at a height of 9 m. When the received specimen is not broken or the glass is scattered and the amount of glass falling from the sheet is less than 15 g, it is marked as Pass.

The room temperature evaluation is Fail if the specimen shocked at 10 m height is broken after 227 g of steel balls are stored at 40 ° C. for 4 hours and the glass is scattered or the amount of glass falling from the sheet is 15 g or more. When the amount of the glass falling from the sheet which is not broken or the glass is scattered is less than 15 g, it is designated as Pass.

The laminated glass prepared by applying the sample films 1 to 3, respectively, was evaluated as Pass in both low temperature evaluation and room temperature evaluation.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

1000: uneven shape transfer device
10: non-projection 20: projection
100: convex portion 110: first convex portion
200: recess 500: surface irregularities
600: film for laminated glass, film
Wc: width of recess
d1: distance value between the first and second recesses
d2: distance value between the third and fourth recesses

Claims (7)

A surface irregularities located on at least part or all of one surface of the film, the surface irregularities including a plurality of convex portions and recesses located between the convex portions adjacent to each other,
The surface concave-convex shape includes a first convex portion surrounded by the concave portion and not including the concave portion therein,
The first convex portion is a polygonal shape in which a line connecting the portion where the first convex portion and the concave portion contact each other is triangular, pentagonal, hexagonal, seven-octagonal, or octagonal.
The line drawn along the concave portion starting from one point (starting point, Ps) in contact with one end of the concave-convex shape is a point in which the end and the concave portion of the surface concave-convex shape are in contact with or different from the starting point. The film for laminated glass characterized by continuing to one point (end point, Pe).
The method of claim 1,
The laminated glass film is a laminated glass film, the degassing performance evaluation value is 43 to 72 cmHg at 20 ℃.
The method of claim 2,
The degassing performance evaluation value at 40 ° C of the laminated glass film is to be maintained at 80% or more of the degassing performance evaluation value at 20 ° C of the laminated glass film, film for laminated glass.
The method of claim 1,
The laminated glass film is a laminated glass film, the number of edge bubbles generated 30 or less.
The method of claim 1,
The laminated glass film is a laminated glass film, the average area of the convex portion measured in the unit area (1 cm ² ) is 0.1 to 1.5 mm ² range.
The method of claim 1,
The laminated glass film is one having a roughness of 35 to 52, the film for laminated glass.
The method of claim 1,
The laminated glass film is a laminated glass film having a haze value of 10% or less.

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