JP2001097733A - Method for handling glass film and glass laminate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a glass laminate having excellent handleability and secondary processability. SOLUTION: This glass laminate 1 is obtained by laminating a glass film 2 having >=1 μm and <=100 μm thickness to a readily releasable plastic film 3 having >=1 μm and <=1,000 μm thickness. The readily releasable plastic film 3 comprises a laminate of substantially two layers of a substrate layer 3a and an adhesion layer 3b to glass. The readily releasable plastic film 3 has the product (Pa.μm) of modulus in tension (Pa) at 23 deg.C and thickness (μm) in the range of >=1×108 and <=1×1011 and 0.1-50 (gf/10 mm) peel strength. The glass laminate 1 is retained in an attached state of the readily releasable plastic film 3 until it is used and the readily releasable plastic film 3 plays a role of a protecting film and a reinforcing material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of handling a glass film and a glass laminate, and more particularly, to a method of handling a glass film and facilitating secondary workability when applying the glass film to various industries. The present invention relates to a handling method and a glass laminate.

[0002]

2. Description of the Related Art In recent years, with the miniaturization of electric products, related members have been reduced in size and weight. Glass plates are no exception, and there is a demand for thinner, higher dimensional accuracy and lower defects for applications such as display and sensor / element covers.
For example, a glass film is laminated on a transparent acrylic resin plate and used for a display, or is adhered to a light receiving portion of an optical sensor and used as a light receiving window.

[0003]

However, in order to provide such a high-quality glass plate in the past, it is difficult to handle in post-processes such as polishing and inspection, and in actual application processes, so that extreme caution is required. In addition, the secondary processing is also greatly restricted in terms of method and conditions, which has been a factor that hinders efficiency improvement and application development to other fields.
Although the causes vary widely, the inventors have conducted intensive studies and concluded that the main cause is a decrease in mechanical strength due to thinning of the glass plate. For example, when manufacturing a glass film, the glass film may be damaged when flowing through a line in a thin state, or may be damaged when taking out a stacked and stored glass film in a state where the glass films are in contact with each other. In addition, since the glass film is mounted at a desired position, there are problems such as secondary processing to a predetermined size and breakage when applying an adhesive to the glass film.

[0004] The present invention has been made in view of the above problems, and a first object of the present invention is to provide a method of handling a glass film which is less likely to be damaged when handling the glass film. An object of the present invention is to provide a glass laminate excellent in handleability and secondary workability.

[0005]

According to the first aspect of the present invention, a glass film having a thickness of 0.1 μm or more and 100 μm or less is attached to a peelable plastic film. Then, after adhering to a desired portion on the surface opposite to the surface on which the peelable plastic film is attached, the plastic film is peeled off.

In order to achieve the second object, according to the present invention, at least one surface of a glass film having a thickness of 0.1 μm or more and 100 μm or less has a thickness of 1 μm.
The product (Pa · μm) of the tensile modulus (Pa) and the thickness (μm) at 23 ° C. is 1 × 10 at m or more and 1000 μm or less.
^An easily peelable plastic film in the range of ⁸ or more and 1 × 10 ¹¹ or less is laminated with a peel strength of 0.1 to 50 (gf / 10 mm).

According to a third aspect of the present invention, in the second aspect of the invention, the easily peelable plastic film is a laminate of substantially two or more layers of at least one support layer and at least one glass adhesion layer. Consists of

According to a fourth aspect of the present invention, in the second or third aspect, the glass laminate is continuously wound around an outer surface of the tubular body, and the thickness of the glass film is reduced. (Μm) and the outer diameter (mm) of the tubular body (μm / mm) are 1 or less.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the glass laminate is wound with the glass film facing outward. Therefore, according to the first aspect of the present invention, the glass film is handled in a state of being attached to the peelable plastic film until the glass film is attached to a desired place, and the plastic film plays a role of a protective film and a reinforcing material. . When mounting the glass film at a predetermined location, the glass film is bonded to a desired location with an adhesive on a surface opposite to the surface to which the peelable plastic film is attached, and then the plastic film is peeled and removed. Is done.

According to the second aspect of the present invention, the glass film is laminated with an easily peelable plastic film whose thickness, tensile modulus and peel strength are set to predetermined values. Excellent secondary workability.
Then, when used, the glass film is cut into a predetermined size, the glass film is adhered to a predetermined position by an adhesive, the easily peelable plastic film is peeled off, and only the glass film is mounted at the predetermined position.

According to a third aspect of the present invention, in the second aspect of the present invention, the easily peelable plastic film is a laminate of substantially two or more layers of at least one support layer and at least one glass adhesion layer. , It is easy to adjust the appropriate thickness, tensile modulus and peel strength of the easily peelable plastic film to desired values.

In the invention according to claim 4, in the invention according to claim 2 or 3, the glass laminate is continuously wound around a tubular body, so that the glass laminate is compared with a sheet-like glass laminate. As a result, the size of the manufacturing apparatus can be reduced, and the storage space can be reduced.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, since the glass laminate is wound with the glass film facing outward, a lamination and adhesion process between the glass film and the plastic film is performed. The stress caused by the difference in residual stress or thermal strain at the step is suppressed from adversely affecting the glass film.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 (a),
As shown in (b), the glass laminate 1 has a thickness of 0.1 μm.
glass film 2 having a thickness of 1 μm to 100 μm
An easily peelable plastic film (hereinafter, simply referred to as a plastic film) 3 having a thickness of not less than m and not more than 1000 μm is laminated. Plastic film 3 is 2
The product (Pa · μm) of the tensile modulus (Pa) and the thickness (μm) at 3 ° C. is in the range of 1 × 10 ^{8 to} 1 × 10 ¹¹ , and 0.1 to 50 (gf / 10 mm) peeling Laminated with strength.

As the glass material used for the glass film 2, almost any glass composition such as soda lime glass, borosilicate glass, and alkali-free glass can be used, and those subjected to secondary processing such as strengthening and surface treatment can be used. It is possible, and all can be used properly according to the application.

The glass film 2 can be made by stretching the glass melt at a temperature above the temperature at which the glass melt solidifies in principle. The thickness of the glass film 2 can be controlled by the glass composition, the thickness of the glass melt, the temperature, and the take-up speed. Glass film 2
The effective thickness is 0.1 to 100 μm, and the thickness is 0.1 μm.
When the thickness is smaller than m, the lamination of the plastic film 3 itself becomes difficult. When the thickness is larger than 100 μm, the lamination of the plastic film 3 becomes ineffective.

The plastic film 3 has at least one support layer 3a and at least one glass adhesion layer 3b.
Consists of a laminate of substantially two or more layers. Almost any material can be applied to the support layer 3a. In addition to homopolymers, copolymers, and blends of polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyester, polyamide, and the like, multilayers (laminate films), stabilizers To which additives such as a plasticizer, an impact modifier, a coloring agent and a reinforcing agent are added. Moreover, the glass adhesion layer 3
As the material of b, almost any material can be used, and in addition to a homopolymer, a copolymer, a blend, etc. having a composition such as vinyl acetate, acetal, acrylic, polyamide, polyester, polyurethane, and rubber, Multi-layered, optionally added oil, plasticizer, reinforcing agent, rubber, cross-linking agent, coupling agent, etc., can be used in thermoplastic, thermosetting, pressure-sensitive adhesive, etc. .

The support layer 3a can be formed into a film by a generally known molding method, and an extrusion method, a calender method, a solution / emulsion cast method, or the like can be used.
On the other hand, the glass adhesion layer 3b can be formed by an extrusion coating method on the support layer 3a, a solution / emulsion coating method, a co-extrusion method with the support layer 3a, or the like.

The thickness of the plastic film 3 is preferably 1 μm or more and 1000 μm or less. When the thickness is less than 1 μm, there is substantially no laminating effect. When the thickness exceeds 1000 μm, continuous winding on the outer surface of the tubular body is difficult. The ratio with respect to the perimeter increases, resulting in residual stress, resulting in peeling or breakage of the glass film 2 and inferior secondary workability such as cutting workability.

The plastic film is laminated on at least one side of the glass film, that is, on one side or both sides of the glass film. These lamination forms can be properly used depending on purposes and applications.For example, one member of a glass film is directly bonded to another member by heat fusion or an adhesive, or a functional layer such as an adhesive layer is previously formed. In the case of bonding, it is preferable to laminate only on one side opposite to the bonding surface.

On the other hand, the glass film is protected from being scratched or damaged on the surface, the surface of the glass film is prevented from being stained, and contamination due to cutting powder generated in secondary processing such as drilling and cutting is used. In this case, it is preferable that the glass film is laminated on both sides in order to protect the glass film until immediately before use.

The plastic film 3 preferably has a product (Pa · μm) of its tensile modulus (Pa) and its thickness (μm) at 23 ° C. of 1 × 10 ⁸ or more and 1 × 10 ¹¹ or less, Support layer 3a and glass adhesion layer 3b
Can be achieved by adjusting the type of plastic, the type and amount of additives, and the thickness ratio of each layer. When the product is less than 1 × 10 ⁸ (Pa · μm), the film has no stiffness and becomes wrinkled during lamination with the glass film 2 to impair the appearance or excessively stretch. Poor in secondary workability such as workability. On the other hand, when the above product exceeds 1 × 10 ¹¹ (Pa · μm), the stiffness is too strong, and the handleability such as continuous laminating processability for cutting and sticking to the hard and brittle glass film 2 and cutting. Poor in secondary processing such as workability.

The plastic film 3 has a thickness of 0.1 to 50.
(Gf / 10 mm) with a peel strength of 0.5 to 30 (gf / 10 m
The peel strength of m) is more preferred. Peel strength is 0.1
(Gf / 10 mm), there is no substantial laminating effect,
If it exceeds 50 (gf / 10 mm), the handleability, the secondary workability, etc. are sufficiently satisfied. However, when the glass film 2 is finally removed from the glass film 2, an excessive force is applied, and the glass film 2 may be damaged or the time may be reduced. If it is expended, or if it is assisted by heating, solvent or the like for peeling, it will be troublesome to damage the peripheral members. The peel strength was 180 at a speed of 200 mm / min at 23 ° C.
° The value evaluated by the peel test was used.

The above-mentioned glass laminate 1 may be formed into a sheet shape and stored in a stacked state, or may be formed in a belt shape and continuously wound and stored in a tubular body. The glass laminate 1 is held in a state where the plastic film 3 is adhered until use, and the plastic film 3 plays a role of a protective film and a reinforcing material.

When the glass film 2 is laminated on a transparent acrylic resin plate in order to use the glass film 2 as, for example, a protective film for a display panel, the glass laminate 1 is cut into a desired size and the glass film 2 on the side opposite to the plastic film 3 is cut. Apply adhesive to the surface. Next, after bonding to a predetermined position on the acrylic resin plate, the plastic film 3 is peeled off from the glass film 2 as shown in FIG. When the glass film 2 is used alone as the light receiving window of the light receiving portion of the optical sensor, the glass laminate 1 is cut into a desired size, and then the window frame of the light receiving portion or the glass film 2 corresponding to the window frame is cut off. An adhesive is applied to the periphery, and the glass laminate 1 is adhered to the window frame via the adhesive. Thereafter, the plastic film 3 is peeled and removed.

The lamination of the plastic film 3 and the glass film 2 includes, for example, a method in which the plastic film 3 is heated and then brought into contact with the glass film 2 and vice versa.
Alternatively, there is a method of softening the glass adhesion layer 3b of the plastic film 3 by a method of contacting both after heating, and then press-contacting with a press, a nip roll or the like via a soft cushion material. Furthermore, the glass adhesion layer 3b
Can be simply pressed and adhered by a press, a nip roll, or the like, which is designed in a sticky state in a normal state. Here, as the soft cushioning material, industrially used materials such as foamed polyethylene and soft silicone rubber can be applied.

In particular, in order to produce the glass film 2 continuously and with good thermal efficiency, the glass is still in a heated state during the step of forming the glass film 2 and the plastic film 3 is brought into close contact with the plastic film 3 by nip rolls to form a laminated state. A method of taking out the film as it is or a method of similarly laminating by applying a plastic film 3 in which the glass adhesion layer 3b is designed to be adhesive at the stage when the temperature is cooled to near normal temperature is preferable. According to this method, the glass film 2 is laminated with the plastic film 3 immediately after being formed, so that the mechanical brittleness of the glass film 2 alone is improved, and the handling in the process is improved. Not only that, it also effectively works to reduce the defective rate due to mechanical damage such as scratching.
Further, the nip roll used for forming the glass film 2 can be used as it is as a nip roller for laminating and adhering the glass film 2 and the plastic film 3, so that it is not necessary to reinforce the equipment.

A method of manufacturing a glass laminated body in which a glass film is manufactured by a float method, a redraw method, a fusion method, a down draw method or the like and a plastic film 3 is stacked during the manufacturing process will be described with reference to FIG. The plastic film 3 drawn out from the bobbin 6 with respect to the glass film 2 still heated is drawn out to a predetermined thickness by the rollers 4 and 5 from a glass film forming step (not shown). (Not shown) side is joined upstream of the roller 5 in a state corresponding to the glass film 2, and is laminated on the glass film 2 while passing through the roller 5. The plastic film 3 is laminated on the glass film 2 when the glass film 2 has enough heat to soften the glass adhesion layer 3b. Roller 5 is glass film 2
And a plastic film 3 function as a nip roller for laminating and adhering.

After passing through the roller 5, the glass laminate 1 is cooled, and the glass film 2 is wound outward on the surface of the tubular body 7 provided in the winding device. FIG. 2 (b)
Denotes a glass laminate 1 wound around a tubular body 7.

When continuously obtaining a long glass laminate,
When the laminate of the plastic film 3 and the glass film 2 is continuously wound on the outer surface of the tubular body 7, the thickness (μm) of the glass film 2 and the outer diameter (m
The ratio (μm / mm) to m) is preferably 1 or less. If it exceeds 1, the plastic film 3 is laminated, and although the mechanical brittleness is improved, the curvature of the glass film 2 becomes too large, and cracks occur.

When the laminate is continuously wound on the outer surface of the tubular body 7, it is more preferable that the glass film 2 is wound outward. At the time of laminating the plastic film 3 and the glass film 2 together, the plastic film 3 is heated and adhered or adhered to the glass film 2 under a small tension so as not to wrinkle. . Therefore, when the laminating process is completed, the former tends to be warped toward the plastic film 3 due to the difference in linear expansion in the former and the latter in tension. It is difficult to completely eliminate this effect.
In the case where the glass film 2 is wound inward, the glass film 2 is bent against this tendency, and there is a possibility that cracks may occur.

(Examples) Hereinafter, the present invention will be described in more detail with reference to examples. (Example 1) A soda lime glass plate was heated to a thickness of 70%.
stretched to μm, width 150mm, length 200mm
A homogeneous glass film 2 having the following dimensions was prepared.

Further, a plastic film 3 composed of a support layer 3a made of polypropylene having a thickness of 30 μm and an adhesive layer 3b made of an acrylic pressure-sensitive adhesive having a thickness of 10 μm is extruded, stretched, and solution-coated. And collected. More specifically, first, a polypropylene resin is melt-extruded to form an original film, which is monoaxially or biaxially stretched to form a stretched film (support layer 3).
Obtain a). Next, a plastic film 3 was obtained by coating the stretched film with a gravure roll of an ethyl acetate solution of an acrylic pressure-sensitive adhesive.

The tensile modulus of plastic film (P
The product (Pa · μm) of a) and the thickness (μm) was 6 × 10 ¹⁰ . These films were carefully laminated with a glass film 2 at 20 ° C. using a silicone rubber nip roll to obtain a glass laminate (laminated film) 1. The peel strength of the plastic film 3 from the glass laminate 1 is 40
(Gf / 10 mm). The glass laminate 1 can be easily handled by hand, and can be coated or laminated with an adhesive on the glass film 2 side like a normal glass plate or plastic. Film 3
Could be peeled off.

Example 2 The same glass film 2 as in Example 1 was prepared, and a support layer 3a made of polyethylene terephthalate having a thickness of 25 μm and a glass adhesion layer 3b made of polyethylene oxide having a thickness of 30 μm were used. The constituted plastic film 3 was collected by the extrusion lamination method. The product (Pa · μm) of the tensile modulus (Pa) and the thickness (μm) of the plastic film 3 is 1 × 10
It was ¹¹ . The plastic film 3 was carefully laminated with the glass film 2 preheated to 100 ° C. through a silicone rubber nip roll at 20 ° C. with the glass-adhering layer 3b side of the plastic film 3 facing the glass film 2 side.
The peel strength of the glass laminate 1 was 50 (gf / 10 m
m).

The evaluation of whether or not the continuous glass laminate can be wound into a tubular body in the present invention is performed so that the glass laminate having a width of 150 mm and a length of 200 mm is closely adhered to the tubular body in the longitudinal direction. When the glass film was not cracked, it was evaluated that the film could be wound. The glass laminate 1 can easily follow the glass film 2 toward the outside without cracks on a paper tube as a tubular body having an outer diameter of 173 mm, and the continuous glass laminate 1 can be wound. Was.

(Comparative Example 1) A thickness of 50 μm and a width of 150 m
A borosilicate glass film 2 having a length of 200 mm and a length of 200 mm was prepared. The single-layer glass film 2 is easily broken by hand if it is used as it is, and the adhesive can be coated on the glass film 2 side as in the case of ordinary glass plates and plastics. At the place where it came into contact with equipment such as rolls.

Comparative Example 2 The same glass film 2 as in Example 1 was prepared. Further, a support layer 3a made of polyvinyl chloride containing 100 parts by weight of a plasticizer having a thickness of 5 μm, and a glass adhesion layer 3 made of an acrylic adhesive having a thickness of 2 μm.
The plastic film 3 composed of b and b was subjected to extrusion / stretching and solution coating, respectively, and collected.

The product (Pa · μm) of the tensile modulus (Pa) and the thickness (μm) of the plastic film 3 is 9 × 10
It was ⁷ . These films were used as glass films 2 and 2
The layers were carefully laminated with a silicone rubber nip roll in an atmosphere of 0 ° C. The peel strength of this glass laminate 1 was 160 (gf / 10 mm). In the glass laminate 1, the plastic film 3 had no rigidity during lamination, and wrinkled when laminated with the glass film 2. Further, the plastic film 3 was clinged to the cutter during the cutting process, and the cut surface was rough and cracks were formed in a direction different from the notch direction.

(Comparative Example 3) The same glass film 2 as in Comparative Example 1 was prepared. Further, a plastic film 3 composed of a support layer 3a made of polypropylene having a thickness of 30 μm and a glass adhesion layer 3b made of an acrylic pressure-sensitive adhesive having a thickness of 20 μm is subjected to extrusion / stretching and solution coating, respectively. Collected. The product (Pa · μm) of the tensile modulus (Pa) and the thickness (μm) of the plastic film 3 was 6 × 10 ¹⁰ . These films were carefully laminated with a glass film 2 at 20 ° C. using a silicone rubber nip roll to obtain a glass laminate 1.
The peel strength of the glass laminate 1 was 350 (gf / 10 m
m). This glass laminate 1 could be easily handled by hand, and an adhesive could be coated or laminated on the glass film 2 side like a normal glass plate or plastic. However, peeling of the plastic film 3 was not easy, and as a result, an excessive local force was applied, so that the glass film 2 was damaged.

Comparative Example 4 The same glass film 2 as in Example 1 was prepared except that the thickness was 100 μm. A plastic film 3 composed of a 25 μm-thick support layer 3 a made of polyethylene terephthalate and a 30 μm-thick polyethylene oxide-attached layer 3 b was sampled by extrusion lamination. The product (Pa · μm) of the tensile modulus (Pa) and the thickness (μm) of the plastic film 3 was 1 × 10 ¹¹ . With the side of the plastic film 3 facing the glass adhesion layer 3b facing the glass film 2 side preheated to 100 ° C.
The layers were carefully laminated by simultaneously passing them through a silicone rubber nip roll at an ambient temperature of 20 ° C. The peel strength of the glass laminate 1 is 50 (gf / 10 mm)
Met. The outer diameter of this glass laminate 1 is continuously 96 m.
When the glass film 2 was directed to the outside along the m-shaped paper tube, fine cracks were intermittently formed in the glass film 2 in a direction perpendicular to the winding. In addition, outer diameter 1
When the glass film 2 was directed along the 73 mm paper tube toward the inside, the same intermittent crack as before occurred.

Comparative Example 5 The thickness of the glass laminate 1, that is, the glass film 2, obtained in the same manner as in Example 2 was 70 μm.
The glass laminate 1 of the above is a condition that the ratio (μm / mm) of the thickness of the glass film 2 to the outer diameter of the paper tube is larger than 1.
The glass film 2 was made to extend outward along a paper tube having an outer diameter of 68 mm, but the glass film 2 was cracked.

This embodiment has the following effects. (1) In a state in which the glass film 2 having a thickness of 0.1 μm or more and 100 μm or less is adhered to the peelable plastic film 3, a desired surface is formed on the surface opposite to the surface where the peelable plastic film 3 is adhered. After adhering to the location, the plastic film 3 is peeled and removed, so that the glass film 2 is attached to a desired location.
Therefore, when handling the easily damaged glass film 2,
The glass film 2 is hardly damaged.

(2) The glass laminate 1 has a thickness of 0.1 μm.
The product of the tensile modulus (Pa) and the thickness (μm) at 23 ° C. (Pa · μ) at a thickness of 1 μm or more and 1000 μm or less on one surface of the glass film 2 having a thickness of not less than 100 μm and not more than 100 μm.
m) is in the range of 1 × 10 ⁸ or more and 1 × 10 ¹¹ or less in the range of 0.1 to 50 (gf / 10 mm).
Are laminated with a peel strength of. Therefore, the handleability and the secondary workability until the glass film 2 is mounted on a desired portion are excellent, and the plastic film 3 can be easily peeled off without damaging the glass film 2.

(3) Since the plastic film 3 has a laminated structure of the support layer 3a and the glass adhesion layer 3b, it is easy to adjust the appropriate thickness, tensile modulus and peel strength of the plastic film 3 to desired values. become.

(4) The glass laminate 1 is formed on the outer surface of the tubular body 7.
Are continuously wound, so that the manufacturing apparatus can be reduced in size and the storage space can be reduced as compared with the case where the glass laminate 1 is formed in a sheet shape.

(5) Thickness of glass film 2 (μm)
Since the ratio (μm / mm) between the outer diameter (mm) and the outer diameter (mm) of the tubular body 7 is set to 1 or less, even when the glass laminate 1 is wound around the tubular body 7, the curvature of the glass film 2 increases. That is, the radius of curvature is not too small, and the occurrence of cracks can be avoided.

(6) Since the glass laminate 1 is wound with the glass film 2 facing outward, the stress caused by the difference in residual stress or thermal strain in the step of laminating and bonding the glass film 2 and the plastic film 3. However, adverse effects on the glass film 2 are suppressed.

(7) At the stage where the glass film 2 is in a heated state, the plastic film 3
Since there is no need to provide a step of heating the glass adhesion layer 3b of the plastic film 3, the structure of the device is simplified. Further, since the glass film 2 is immediately laminated with the plastic film 3 after being formed, the mechanical brittleness of the glass film 2 alone is improved, and not only the handling property in the process is improved, but also
The failure rate due to mechanical damage such as scratching is also reduced.

The embodiment is not limited to the above, and may be embodied as follows, for example. The glass laminate 1 is not limited to a configuration in which the plastic film 3 is releasably laminated only on one surface of the glass film 2, and may be a configuration in which the plastic film 3 is releasably laminated on both surfaces of the glass film 2. . In this case, both sides of the glass film 2 are plastic films 3
Therefore, the glass film 2 is less likely to be damaged during handling or storage.

As shown in FIGS. 3A and 3B, the plastic film 3 is laminated on one surface of the glass film 2 and the adhesive layer 15 is adhered to the other surface and peeled off the surface. A configuration in which the paper 16 is attached may be employed. When bonding the glass film 2 to a desired portion, the glass laminate 1 is cut into a desired shape, and the release paper 16 is peeled off to expose the adhesive layer 15 as shown in FIG. The glass film 2 is bonded to a desired location via the agent layer 15. Next, the plastic film 3 is peeled off. In this case, since the adhesive layer 15 is formed on the glass film 2, it is not necessary to apply an adhesive at the time of use, and after cutting into a desired shape, the release paper 16 is peeled off at a desired location. Can be glued.

The plastic film 3 is not limited to one in which the glass adhesion layer 3b is coated or laminated on the entire surface of the support layer 3a, and may be, for example, a structure in which the glass adhesion layer 3b is spotted.

In the manufacturing process of the glass film 2, the glass film 2, which has been pulled to a predetermined thickness by a roller,
Instead of continuously winding a glass laminate 1 in which the plastic film 3 is continuously laminated with the glass adhesion layer 3b corresponding to the glass film 2 around a tubular bobbin, the glass laminate 1 is cut into predetermined dimensions and laminated. You may make it collect | recover. Also in this case, since the glass film 2 is formed and immediately laminated on the plastic film 3, the mechanical brittleness of the glass film 2 alone is improved, and not only the handling property in the process is improved but also the glass film 2 is improved. Also, the failure rate due to mechanical damage such as scratching is reduced.

In the method for manufacturing the glass laminate 1,
The glass-to-glass adhesion layer 3b of the plastic film 3 is formed of an adhesive material at room temperature, and when the glass film 2 has cooled to near room temperature, the plastic film 3
May be laminated on the glass film 2. In this case, the adhesion layer 3b of the plastic film 3 to the glass
However, there is no possibility that the adhesive strength to the glass film 2 becomes too strong due to the heating, so that peeling becomes difficult.

The technical ideas (inventions) other than those described in the claims that can be grasped from the above embodiment will be described below together with their effects. (1) In the invention according to any one of claims 2 to 5, an easily peelable plastic film is laminated on one surface of the glass film, and an adhesive layer is adhered to the other surface. Release paper is attached to the surface. In this case, since the adhesive is adhered to the glass film, it is not necessary to apply the adhesive at the time of use, and after cutting into a desired shape, the release paper can be peeled off to bond to the desired position.

(2) In a glass film manufacturing process, a glass film pulled to a predetermined thickness by a roller is
A method for producing a glass laminate in which an easily peelable plastic film having an adhesion layer to glass is continuously laminated in a state where the adhesion layer to glass corresponds to the glass film, and is continuously wound around a tubular bobbin. In this case, after the glass film is formed, it is immediately laminated with the easily peelable plastic film, so that the mechanical brittleness of the glass film alone is improved, and not only the handling property in the process is improved, The failure rate due to mechanical damage such as scratching is also reduced.

(3) In the method for producing a glass laminate of (2), the easily peelable plastic film is laminated on the glass film while the glass film is in a heated state. In this case, there is no need to provide a step of heating the glass-attached layer of the easily peelable plastic film,
The structure of the device is simplified.

(4) In the method for producing a glass laminate of (2), the adhesive layer to the glass of the easily peelable plastic film is formed of a material having an adhesive property at room temperature, and when the glass film has cooled to near room temperature. The easily peelable plastic film is laminated on the glass film. in this case,
There is no danger that the adhesive strength to the glass film of the easily peelable plastic film with respect to the glass film becomes too strong due to the heating and the peeling becomes difficult.

[0059]

As described in detail above, according to the first aspect of the present invention, the glass film is less likely to be damaged when handled.

According to the second to fifth aspects of the present invention, the handleability and the secondary workability are excellent, and the application to parts in various industries is facilitated. According to the third aspect of the present invention, it becomes easy to adjust the appropriate thickness, tensile modulus and peel strength of the easily peelable plastic film to desired values.

According to the fourth aspect of the present invention, the manufacturing apparatus can be reduced in size and the storage space can be reduced as compared with the sheet-like glass laminate. According to the fifth aspect of the present invention, it is possible to prevent a stress due to a residual stress or a difference in thermal strain in a lamination and adhesion process between the glass film and the plastic film from adversely affecting the glass film.

[Brief description of the drawings]

FIG. 1A is a partial schematic diagram of a glass laminate according to an embodiment, and FIG. 1B is a partial schematic diagram of a state where a part of a plastic film is peeled off.

2A is a schematic diagram illustrating a method for manufacturing a glass laminate, and FIG. 2B is a schematic diagram illustrating the glass laminate wound on a tubular body.

FIG. 3 (a) is a partial schematic diagram of a glass laminate according to another embodiment, and FIG. 3 (b) is a partial schematic diagram of a state where a part of a release paper and a plastic film is peeled off.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Glass laminated body, 2 ... Glass film, 3 ... Easy peelable plastic film, 3a ... Support layer, 3b ... Glass adhesion layer, 7 ... Tubular body.

 ──────────────────────────────────────────────────続 き Continued on front page F term (reference) 4F100 AG00A AK01B AK07 AK25 AK25G AK54 AR00C AT00D BA02 BA03 BA04 BA07 BA10A BA10B BA10D BA25A BA25B CB05 CB05C DA11D EH51D GB90 JK03B JK06 JK01J00L JJ01L00

Claims (5)

[Claims] 1. A state in which a glass film having a thickness of 0.1 μm or more and 100 μm or less is attached to a peelable plastic film, and a desired portion is formed on a surface opposite to the surface on which the peelable plastic film is attached. A method for handling a glass film in which the plastic film is peeled off after being adhered to the glass film. 2. A tensile elastic modulus (P) at 23 ° C. at a thickness of 1 μm to 1000 μm on at least one surface of a glass film having a thickness of 0.1 μm to 100 μm.
The easily peelable plastic film having a product of (a) and the thickness (μm) (Pa · μm) in the range of 1 × 10 ⁸ or more and 1 × 10 ¹¹ or less has a peel strength of 0.1 to 50 (gf / 10 mm). A glass laminate that is laminated. 3. The glass laminate according to claim 2, wherein the easily peelable plastic film comprises at least one laminate of at least one support layer and at least one adhesion layer to glass. 4. The glass laminate is continuously wound around an outer surface of a tubular body, and has a thickness (μ)
m) and the outer diameter (mm) of the tubular body (μm / mm)
The glass laminate according to claim 2 or 3, wherein is 1 or less. 5. The glass laminate according to claim 4, wherein the glass laminate is wound with the glass film facing outward.