CN115140431A - Glass laminate and glass package - Google Patents
Glass laminate and glass package Download PDFInfo
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- CN115140431A CN115140431A CN202210276428.3A CN202210276428A CN115140431A CN 115140431 A CN115140431 A CN 115140431A CN 202210276428 A CN202210276428 A CN 202210276428A CN 115140431 A CN115140431 A CN 115140431A
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Images
Classifications
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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
- B65D61/00—External frames or supports adapted to be assembled around, or applied to, articles
-
- 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
- B65D19/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
- B65D19/36—Pallets comprising a flexible load carrier extending between guide elements, e.g. guide tubes
-
- 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
- B65D19/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
- B65D19/38—Details or accessories
-
- 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
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/02—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage
- B65D81/05—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Packaging Frangible Articles (AREA)
Abstract
The invention provides a glass laminate and a glass package, and provides a technology for inhibiting damage caused by the deflection of a glass plate under the condition of using a linear spacer. The glass laminate comprises a plurality of glass plates stacked together and a linear spacer disposed between the adjacent glass plates or between the glass plates and a tray. Each of the glass plates has a rectangular shape in plan view, and has first and second sides parallel to each other and third and fourth sides parallel to each other. The linear spacers extend at least from the third side to the fourth side in a first direction parallel to the first side and the second side, and are arranged at intervals in a second direction parallel to the third side and the fourth side. The glass plate and the linear spacer in contact with the lower surface of the glass plate counted from the top N (N is an integer of 1 or more) satisfy formula (1) described in the specification.
Description
Technical Field
The present disclosure relates to a glass laminate and a glass package.
Background
From the viewpoint of conveyance efficiency, glass sheets are conveyed in a laminated manner. If adjacent glass sheets contact each other, scratches may be generated. Therefore, a sheet is interposed between adjacent glass plates (see, for example, patent document 1).
In recent years, the demand for paper jams has increased, and the price of paper jams has increased. In addition, when using a interleaf paper, foreign matter components other than cellulose, for example, adhesive components such as nylon, polyester, EVA, acrylic resin, etc., contained in the interleaf paper may adhere to the glass plate and may not be removed even if the glass plate is washed, and thus the use of the glass plate may be difficult.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2017-186729
Patent document 2: japanese patent laid-open No. 2007-230610
Problems to be solved by the invention
The linear spacer is not in contact with the entire lower surface of the upper glass plate, but is in contact with only a part thereof. Therefore, the upper glass plate may be bent by its own weight and may come into contact with the lower glass plate or the tray. The thinner the thickness of the glass sheet is, the more significant the problem becomes. This is because the thinner the thickness of the glass plate is, the easier the glass plate is to flex.
Conventionally, a linear spacer is used for a glass plate having a relatively large thickness, the glass plate has a negligible degree of deflection, and the occurrence of damage due to the deflection of the glass plate has not been studied as a problem.
Disclosure of Invention
One embodiment of the present disclosure provides a technique for suppressing generation of damage due to flexure of a glass plate when a linear spacer is used.
Means for solving the problems
A glass laminate according to one embodiment of the present disclosure includes a plurality of glass plates stacked and a linear spacer disposed between the adjacent glass plates or between the glass plates and a tray. Each of the glass plates has a rectangular shape in plan view, and has first and second sides parallel to each other and third and fourth sides parallel to each other. The linear spacers extend at least from the third side to the fourth side in a first direction parallel to the first side and the second side, and are arranged at intervals in a second direction parallel to the third side and the fourth side. The Young's modulus of the Nth (N is an integer of 1 or more) glass plate from the top is E (MPa), and the density is rho (kg/mm) 3 ) The plate thickness is t (mm), and the length of each of the first side and the second side is a (mm). The thickness of the linear spacers abutting the lower surface of the nth glass plate from above is H (μm), and the distance between the center lines of the linear spacers in the second direction is L (mm). The following formula (1) holds.
[ mathematical formula 1 ]
Effects of the invention
According to one embodiment of the present disclosure, the nth glass plate counted from above (N is an integer of 1 or more) and the linear spacer in contact with the lower surface of the nth glass plate counted from above satisfy the above expression (1). Therefore, the thickness of the linear spacer is larger than the deflection of the upper glass plate. Therefore, the contact between the upper glass plate and the lower glass plate or the tray can be suppressed, and the occurrence of damage can be suppressed.
Drawings
Fig. 1 is a perspective view showing a glass package according to an embodiment.
Fig. 2 is a plan view showing an example of the arrangement of the nth glass plate and the linear spacers in contact with the lower surface of the nth glass plate from above.
Fig. 3 is a cross-sectional view showing an example of the arrangement of the linear spacers in which the weight of the 1 st glass plate 21 from above to the N-1 (N is an integer of 2 or more) glass plates from above does not generate a bending moment.
Fig. 4 is a cross-sectional view showing an example of the arrangement of the linear spacers for generating a bending moment in the nth glass plate from above by the weight of the 1 st glass plate 21 from above to the nth-1 (N is an integer of 2 or more) glass plate from above.
Fig. 5 is an enlarged cross-sectional view showing one end of the glass plate in the Y-axis direction.
Fig. 6 is a diagram showing an example of a relationship between the distance between the linear spacers and the presence or absence of contact and deflection of the glass plate.
Description of the reference symbols
1. Glass package
2. Glass laminate
21. Glass plate
211. First side
212. Second side
213. Third side
214. Fourth side
22. Line spacer
3. Tray
Detailed Description
Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the drawings, the same or corresponding components are denoted by the same reference numerals, and description thereof may be omitted. In the drawings, the X-axis direction, the Y-axis direction, and the Z-axis direction are perpendicular to each other, the X-axis direction and the Y-axis direction are horizontal, and the Z-axis direction is vertical.
First, the glass package 1 according to the present embodiment will be described with reference to fig. 1. The glass package 1 includes a glass laminate 2 and a tray 3 on which the glass laminate 2 is placed. The glass laminate 2 includes a plurality of glass plates 21 stacked one on another and a linear spacer 22 disposed between adjacent glass plates 21 or between a glass plate 21 and the tray 3.
The plurality of glass plates 21 have, for example, the same shape and the same size. The number of the glass plates 21 included in the glass laminate 2 is not particularly limited, and is, for example, 50 to 800 sheets, preferably 120 to 600 sheets, and more preferably 140 to 250 sheets.
The glass plate 21 is, for example, a substrate or cover glass for a display, more specifically, a substrate or cover glass on which TFTs (Thin Film transistors) or color filters are formed. The glass plate 21 may be a semiconductor wafer such as a silicon wafer or a carrier substrate to which semiconductor chips are bonded.
The carrier substrate is bonded to the semiconductor wafer, for example, before the semiconductor wafer is thinned, and the semiconductor wafer is reinforced during the thinning of the semiconductor wafer. After the semiconductor wafer is thinned, the semiconductor wafer is separated from the carrier substrate.
Alternatively, the carrier substrate may be bonded to the plurality of semiconductor chips before the plurality of semiconductor chips are sealed with the resin, and the plurality of semiconductor chips may be positioned. After the plurality of semiconductor chips are sealed with the resin, the plurality of semiconductor chips and the carrier substrate are separated.
The linear spacers 22 are disposed between the adjacent glass plates 21, and suppress the occurrence of damage. The linear spacer 22 is disposed between the glass plate 21 and the tray 3, and suppresses the occurrence of damage.
Unlike the paper clip, the linear spacer 22 is not in contact with the entire lower surface or upper surface of the glass plate 21, but is in contact with only a part thereof. Therefore, adhesion of foreign matter to the glass plate 21 can be suppressed, and the quality of the glass plate 21 can be improved. The line spacer 22 is preferable because high cleanliness is required for the glass plate 21 for display or carrier substrate.
Unlike the paper, the linear spacer 22 can be recovered after use and reused. Therefore, resources can be saved. The string-like spacer 22 may be cleaned before reuse. Foreign matter adhering to the linear spacer 22 can be removed by cleaning.
The cross-sectional shape of the linear spacer 22 may be circular or rectangular. When the cross-sectional shape of the linear spacer 22 is rectangular, the glass plate 21 can be stably supported as compared with the case of circular shape. When the cross-sectional shape of the linear spacer 22 is circular, the contact area with the glass plate 21 becomes smaller than that in the case of rectangular shape, and it is considered that the adhesion of foreign matter to the glass plate 21 can be further suppressed.
The material of the string-like spacer 22 is not particularly limited, and is, for example, a natural fiber or a synthetic fiber. Specific examples of natural fibers include cotton, hemp, silk, and wool. Specific examples of the synthetic fibers include rayon, cuprammonium fiber, acetate fiber, polyethylene (PE) fiber, nylon fiber, polyester fiber, polyamide fiber, polyimide fiber, acrylic fiber, polyarylate fiber, polyparaphenylene Benzobisoxazole (PBO) fiber, polybenzimidazole (PBI) fiber, polyphenylene sulfide (PPS) fiber, fluorine fiber, and carbon fiber. The linear spacer 22 may be a monofilament, a multifilament, or a twisted yarn obtained by twisting a plurality of yarns. Further, a yarn in which a plurality of the fibers are combined may be used.
The tray 3 is a flat tray that horizontally supports the glass plates 21. The tray 3 is a flat tray in the present embodiment, but may be a vertical tray. The vertical tray supports each glass plate 21 obliquely.
Next, the process of the present invention is described, the arrangement of the nth glass plate 21 (N is an integer of 1 or more) and the linear spacer 22 in contact with the lower surface of the glass plate 21 according to the present embodiment will be described with reference to fig. 2. As shown in fig. 2, the glass plate 21 has a rectangular shape in plan view, and has a first side 211 and a second side 212 which are parallel to each other, and a third side 213 and a fourth side 214 which are parallel to each other.
In the present specification, the term "plan view" refers to a view from a direction perpendicular to the main surface of the glass plate 21. For example, when the glass plate 21 is horizontally supported, "in a plan view" means a case of being viewed from the Z-axis direction.
The length a of the first side 211 and the second side 212 may be the same as or different from the length b of the third side 213 and the fourth side 214. That is, the rectangle may or may not be square. The rectangle may include a shape in which the corners are chamfered.
The linear spacers 22 extend at least from the third side 213 to the fourth side 214 in a first direction (for example, the X-axis direction) parallel to the first side 211 and the second side 212, and are arranged at intervals in a second direction (for example, the Y-axis direction) parallel to the third side 213 and the fourth side 214.
For example, the plurality of linear spacers 22 are arranged at intervals in the Y axis direction. Although not shown, the linear spacer 22 may have a U-shaped folded portion at one end or both ends in the Y-axis direction, or may be arranged in a zigzag shape. That is, the 1 linear spacer 22 may have a plurality of linear portions arranged at intervals in the Y axis direction and a folded portion connecting the linear portions adjacent to each other in the Y axis direction.
The length a of each of the first side 211 and the second side 212 of the glass plate 21 may be longer than the length b of each of the third side 213 and the fourth side 214. That is, the glass plate 21 may have long sides and short sides in a plan view.
When the glass plate 21 has long sides and short sides in a plan view, the linear spacers 22 may be provided parallel to the long sides. The number of the linear spacers 22 or the number of folded portions of the linear spacers 22 can be reduced as compared with the case where the linear spacers 22 are provided in parallel with the short sides.
Next, the 1 st glass plate 21 counted from the top will be described with reference to FIG. 3 1 To the (N-1) th (N is an integer of 2 or more) glass plate 21 from above N-1 The weight of (2) is not so heavy that the Nth glass plate 21 is counted from above N An example of the arrangement of the linear spacers 22 generating a bending moment. In FIG. 3, 22 N-1 Showing and counting the (N-1) th glass plate 21 from above N-1 The lower surface of (2) of the linear spacer, 22 N Showing and counting the Nth glass plate 21 from above N The lower surface of the linear spacer.
As shown in FIG. 3, the Nth glass plate 21 may be interposed therebetween N Upper side ofOf the linear spacer 22 N-1 And the lower linear spacer 22 N Are arranged at the same position in the Y-axis direction. In this case, the glass plate 21 1 ～21 N-1 Not to make the glass plate 21 N A bending moment is generated. In this case, the glass plate 21 N It is deflected only by its own weight. Further, the 1 st glass plate 21 is counted from above 1 But also flexes due to its own weight. Thus, N may also be 1.
The glass plate 21 is formed by the Nth glass plate (N is a natural number of 1 or more) from the upper side N Is also referred to as dead-weight deflection. The bending by self weight is mainly composed of (1) the Nth glass plate 21 counted from the upper side N The following parameters (2) relate to the Nth glass plate 21 counted from above N Lower surface of the linear spacer 22 N The following parameters.
(1) Glass plate 21 N Has a Young's modulus of E (MPa) and a density of rho (kg/mm) 3 ) The plate thickness is t (mm), and the lengths of the first side 211 and the second side 212 are a (mm), respectively. E is, for example, 60000MPa or more and 110000MPa or less, preferably 65000MPa or more and 95000MPa or less, and more preferably 70000MPa or more and 90000MPa or less. P is, for example, 2.2X 10 -6 kg/mm 3 Above and 3.0X 10 -6 kg/mm 3 Hereinafter, 2.3 × 10 is preferable -6 kg/mm 3 Above and 2.8X 10 -6 kg/mm 3 Hereinafter, more preferably 2.4 × 10 -6 Above and 2.7X 10 -6 The following. t is, for example, 0.05mm or more and 2.0mm or less, preferably 0.05mm or more and 0.6mm or less. a is, for example, 100mm to 4000mm, preferably 300mm to 3300mm, more preferably 1500mm to 3300mm, and further preferably 1800mm to 3300 mm.
(2) Line spacer 22 N Has a thickness of H (mum), and the linear spacer 22 N Is L (mm) in the Y-axis direction. H is, for example, 50 μm or more and 1000 μm or less, preferably 100 μm or more and 800 μm or less, and more preferably 200 μm or more and 500 μm or less. H on the glass plate 21 1 ～21 N Is applied to the linear spacer 22 N Measured in the state of (1). L is, for example, 2mm or more and 500mmHereinafter, the thickness is preferably 20mm to 300mm, and more preferably 40mm to 150 mm. As shown in fig. 3, L is a linear spacer 22 N Are spaced from each other in the Y-axis direction. The intervals may be equal intervals or may be unequal intervals. In the latter case, L may also be a maximum value. At L max, the self-weight deflection is greatest.
The present inventors found through experiments and the like that, when the following formula (1) is satisfied, the glass sheet 21 can be suppressed from being deflected by its own weight in a stationary state N And a glass plate 21 N+1 The contact of (2) can suppress the occurrence of damage. The stationary state is, for example, a state when the glass package 1 is stored in a warehouse or the like.
[ math figure 2 ]
In the above formula (1), σ 1 (μm) is a theoretical value of self-weight deflection. The theoretical value is calculated as a height difference between a midpoint of the rectangular glass plate and both ends of the rectangular glass plate when the both ends are supported from below (the interval between both ends is equal to L). In the above formula (1), I (mm) 4 ) Showing the glass plate 21 N The sectional moment of inertia of (1), w (N/mm) represents the glass plate 21 N The self weight per unit length of (a).
If the line spacer 22 N Thickness H of (2) to glass plate 21 N When the theoretical value of the self-weight deflection of (a 1) is thick, it is considered that the glass sheet 21 is N Not in contact with the lower glass plate 21 N+1 Or the lower tray 3.
However, the inventors have conducted investigations and found that the linear spacer 22 is not limited to the above-described one N Thickness H of (2) to glass plate 21 N When the theoretical value σ 1 of the self-weight deflection of (2) is small, the glass plate 21 may be present N Not in contact with the lower glass plate 21 N+1 Or the situation where the tray 3 below is in contact. The inventors have found, after the investigation, that if the linear spacer 22 is used N When the thickness H of (2) is 0.8 times or more the theoretical value sigma 1, the glass plate 21 N Not in contact with the underlying glass plate 21 N+1 Or belowThe square tray 3 is in contact.
This means that the glass plate 21 N The actual value of the dead-weight deflection of (a) is smaller than the theoretical value σ 1. This is presumed to be due to the following 4 reasons (a) to (D).
(A) This is because the theoretical value σ 1 of the self-weight deflection is assumed to be the linear spacer 22 N Supporting the glass sheet 21 at points N But actually is supported by a surface. Such as a line spacer 22 N Even if the cross-section is circular when no load is applied, the load is applied to the linear spacer 22 N Is deformed by the load of (2) to face-support the glass plate 21 N . In the case of surface support, the linear spacer 22 is supported at a point more than in the case of point support N The distance L therebetween becomes smaller.
(B) This is because the theoretical value σ 1 of the self-weight deflection is not considered as the linear spacer 22 as the support body N And a glass plate 21 N But actually generates friction. Glass plate 21 N Is hard to move due to friction, and thus the glass plate 21 is suppressed N Deformation (flexure) of (2).
(C) This is because the theoretical value σ 1 of the self-weight deflection does not take into account the upper linear spacer 22 N-1 But actually the upper linear spacer 22 is N-1 Pressing glass plate 21 N At both ends of the limiting glass plate 21 N Deformation of (2). As a result, the glass plate 21 is suppressed N The deflection of (2).
(D) This is because the theoretical value σ 1 of the self-weight deflection is calculated as a height difference between a midpoint and both ends of a rectangular glass plate when both ends are supported from below (the interval between both ends is equal to L), but actually, a plurality of support points exist between both ends of the glass plate. Since the glass plate is bent symmetrically about each support point, the amount of bending is reduced even if the distance between adjacent support points is the same.
The glass plate 21 was estimated from the 4 reasons (A) to (D) described above N The actual value of the self-weight deflection of (2) is smaller than the theoretical value σ 1. Therefore, if the above equation (1) is established, the linear spacer 22 N Thickness H of (2) to the upper glass plate 21 N The actual value of the self-weight deflection of (2) is large. Therefore, the deflection of the sheet due to its own weight can be suppressedUpper glass plate 21 N With the lower glass plate 21 N+1 Or contact of the lower tray 3, the occurrence of damage can be suppressed.
In FIG. 3, the Nth glass plate 21 N Under which there is an N +1 th glass plate 21 N+1 However, the tray 3 may be present instead. In the latter case, in the stationary state, the glass plate 21 can be suppressed from being deflected by its own weight N The contact with the tray 3 can suppress the occurrence of damage.
Further, the above equation (1) is preferably satisfied for the glass plate 21 closest to the tray 3, that is, the lowermost glass plate 21. When the glass plate 21 comes into contact with the tray 3, the cushioning material on the surface of the tray 3 may be damaged. In this case, the cushioning material on the surface of the tray 3 needs to be replaced, which causes a large damage. Therefore, the above equation (1) is preferably satisfied for the lowermost glass plate 21. The same applies to the following formulas (2) to (5).
The above expression (1) may be satisfied for at least 1 glass plate 21 out of the plurality of glass plates 21 constituting the glass laminate 2, but is preferably satisfied for the lowermost glass plate 21 as described above, and more preferably satisfied for all the glass plates 21. The same applies to the following formulae (2) to (5).
Conventionally, the use of the linear spacer 22 for the glass plate 21 having a relatively large thickness has led to a negligible deflection of the glass plate 21, and the occurrence of damage due to the deflection of the glass plate 21 has not been studied as a problem.
According to the present embodiment, the number N (N is an integer of 1 or more) of glass plates 21 counted from above are used N And the glass plate 21 N Lower surface of the linear spacer 22 N Satisfying the above formula (1), the glass plate 21 can be prevented from being damaged N The damage caused by the self-weight deflection of (2).
The glass plate 21 for a display or a carrier substrate is required to have few defects, and therefore, the application of the technology of the present disclosure is significant.
In the present embodiment, the glass plate 21 is horizontally supported by the flat pallet, but may be obliquely supported by the vertical pallet. When the glass plate 21 is supported obliquely, the glass plate 21 is less deflected than when the glass plate 21 is supported horizontally. Therefore, even when the glass plate 21 is supported in an inclined manner, if the above expression (1) is satisfied, the occurrence of damage can be suppressed. The same applies to the following formulae (2) to (5).
Further, the details are described in the first example section, but the present inventors found through experiments and the like that if the following formula (2) is satisfied, the glass plate 21 can be suppressed from being deflected by its own weight in a vibrating state N And a glass plate 21 N+1 Can inhibit the generation of damage. The vibration state is, for example, a state when the glass package 1 is conveyed by a vehicle or the like.
[ math figure 3 ]
H≥σ1×1.6…(2)
In FIG. 3, the Nth glass plate 21 N Under which there is an N +1 th glass plate 21 N+1 However, the tray 3 may be present instead. In the latter case, in the vibration state, the glass plate 21 can be suppressed from being deflected by its own weight N The contact with the tray 3 can suppress the occurrence of damage.
Next, referring to FIG. 4, the 1 st glass plate 21 counted from above will be described 1 To the (N-1) (N is an integer of 2 or more) glass plate 21 counted from above N-1 The weight of (A) is such that the Nth glass plate 21 is counted from above N An example of the arrangement of the linear spacers 22 generating a bending moment.
As shown in FIG. 4, the Nth glass plate 21 may be interposed therebetween N Upper linear spacer 22 N-1 And the lower linear spacer 22 N Are arranged at different positions in the Y-axis direction. In this case, the glass plate 21 1 ～21 N-1 The weight (hereinafter, also referred to as "loading weight") of the glass plate 21 N A bending moment is generated.
Make the glass plate 21 under the loading weight N When a bending moment is generated, deflection due to the load weight occurs. Hereinafter, the deflection due to the load weight is also referred to as "3-point bending deflection". As shown in fig. 4, the 3-point bending deflection is maximized at 2 points (lower line spacers 22) adjacent to each other in the Y-axis direction N ) Upper linear spacers 22 are disposed at equidistant positions N-1 In the case of (c).
Therefore, the following formula (3) is preferably satisfied. If the following expression (3) is satisfied, the glass plate 21 is loaded with a load even in a stationary state N Even when a bending moment is generated, the glass sheet 21 can be suppressed N And a glass plate 21 N+1 Can inhibit the generation of damage.
[ mathematical formula 4 ]
In the above formula (3), σ 2 (μm) is a theoretical value of 3-point bending deflection. The theoretical value σ 2 is calculated as a height difference between a midpoint of both ends of a rectangular glass plate when the glass plate is pressed from above at a midpoint of both ends while both ends of the glass plate are supported from below (the interval between both ends is equal to L). In the above formula (3), F (N) is the weight of the load.
In FIG. 4, the Nth glass plate 21 N Under which there is an N +1 th glass plate 21 N+1 However, the tray 3 may be present instead. In the latter case, the glass sheet 21 is loaded with a weight even in a stationary state N Even when a bending moment is generated, the glass sheet 21 can be suppressed N The contact with the tray 3 can suppress the occurrence of damage.
It is assumed that the actual value of the 3-point bending deflection is also smaller than the theoretical value σ 2 for the above 3 reasons (a), (B), and (D). Thus, for exampleIf the above formula (3) is satisfied, the linear spacer 22 N Is greater than the actual value of the sum of the 3-point bending deflection and the self-weight deflection. Therefore, the upper glass plate 21 can be suppressed N With the lower glass plate 21 N+1 Or contact of the lower tray 3, the occurrence of damage can be suppressed. In addition, the linear spacer 22 N The thickness H of (σ 1+ σ 2) × 1.0 or more. Here, the coefficient "1.0" is a safety factor.
As shown in fig. 5, one end of each glass plate 21 in the Y-axis direction is a free end that is not fixed. Therefore, the deflection occurs due to the self-weight from the free end to the support point closest to the free end. Hereinafter, this deflection is also referred to as "first free end deflection".
Therefore, the following formula (4) is preferably satisfied. When the following expression (4) is satisfied, the glass plate 21 can be suppressed from being bent at the first free end in the stationary state N And a glass plate 21 N+1 Or contact of the tray 3, can suppress the occurrence of damage. In the following formula (4), "1.2" as a coefficient is a safety factor.
[ math figure 5 ]
In the above equation (4), σ 3 (μm) is a theoretical value of the first free end deflection. In the above formula (4), L1 (mm) is the number N (N is an integer of 1 or more) of glass plates 21 counted from above N And the line spacer 22 closest to the first side 211 N In the Y-axis direction.
Although not shown, the other end of each glass plate 21 in the Y-axis direction is also a free end that is not fixed. Therefore, the deflection occurs due to the self-weight from the free end to the support point closest to the free end. Hereinafter, this deflection is also referred to as "second free end deflection".
Therefore, the following formula (5) is preferably satisfied. When the following expression (5) is satisfied, the glass plate 21 can be suppressed from being deflected by the second free end in the stationary state N And a glass plate 21 N+1 Can inhibit the generation of damage. In the following formula (5), "1.2" as a coefficient is a safety factor.
[ mathematical formula 6 ]
In the above equation (5), σ 4 (μm) is a theoretical value of the second free end deflection. In the above formula (5), L2 (mm) is the Nth (N is an integer of 1 or more) glass plate 21 counted from above N Second side 212 and the linear spacer 22 closest to the second side 212 N In the Y-axis direction.
Here, in the formulae (4) and (5), the safety factor is preferably set to "1.5" or more. This is because the glass plate 21 N Most of which are broken from the end faces. Glass plate 21 N The end face of (2) is a cut surface, and if there is fine damage or crack in the cut surface, the glass sheet 21 N And is broken from the end face.
[ examples ] A
The experimental data will be described below. Examples 1 to 5, 8 to 12, and 14 to 26 are examples, and examples 6 to 7, 13, and 27 to 29 are comparative examples.
In example 1, lines (L =40 mm) parallel to the X axis direction were arranged at a pitch of 40mm in the Y axis direction on a flat tray, and a glass plate was horizontally placed thereon such that the long side of the glass plate was parallel to the X axis direction. The wire is a PE wire having a circular cross-sectional shape in a state where no external force is applied. The glass plate had an X-axis dimension of 470mm (a =470 mm), a Y-axis dimension of 370mm (b =370 mm), and a Z-axis dimension of 0.5mm (t =0.5 mm).
Then, (1) lines parallel to the X-axis direction were arranged on the glass plate at a pitch of 40mm in the Y-axis direction, and (2) the glass plate was horizontally placed so that the long side of the glass plate was parallel to the X-axis direction, thereby obtaining a glass package having 20 glass plates. After 20 glass plates were washed with an alkali detergent and a disk brush before being loaded (hereinafter, also referred to as "alkali washing"), the surfaces of the glass plates were observed with a microscope attached to a foreign matter inspection machine for FPD (manufactured by Toray engineering Co., ltd., model number: HS-830 e), and it was confirmed that there was no scratches on the surfaces of the glass plates.
Further, thereafter, a load corresponding to a surface pressure of 1.3kPa was applied to the entire upper surface (470 mm. Times.370 mm) of the uppermost glass plate. At this time, the thickness of the wire disposed between the lowermost glass plate and the flat tray was 114 μm (H =114 μm).
Next, using a small vibration testing machine for transport test (manufactured by IMV Inc.: m120/MA 1), a vibration test was carried out according to JIS Z0232: method 2020 (PSD: general road transport, acceleration 5.9m/s, appendix A) 2 30 minutes) was performed with random vibration applied in the vertical direction. Then, the package was opened sequentially from above for 20 glass plates while recovering the string-like spacers. When the glass plates were taken out from the tray, the adhesion of the glass plates to each other was not confirmed.
Next, the glass plate disposed at the lowermost position during the loading is subjected to alkali cleaning. The surface of the glass plate after the alkali cleaning was inspected by the foreign matter inspection machine for FPD and a microscope attached to the inspection machine, and as a result, no damage was observed, and no damage was observed due to contact between the glass plates or contact between the glass plate and the tray (hereinafter, simply referred to as "contact damage"). The contact damage is damage generated in a region where the glass plate and the linear spacer do not contact each other. The possibility of damage occurring in the area due to contact of the glass sheets with each other or with the tray is extremely high.
Examples 2 to 29 experiments were carried out under the same conditions as in example 1 except for the conditions shown in table 1. In addition, in the case where adhesion between the glass plates was confirmed when the glass plates were taken out from the tray after the vibration test, and in the case where contact damage was confirmed, further, after the glass package was produced, a test for unpacking the glass package was performed without performing the vibration test. The experimental results of examples 1 to 29 are shown in table 1 and fig. 6.
[ TABLE 1 ]
| Material of | H[μm] | L[mm] | Evaluation of | |
| Example 1 | PE | 114 | 40 | ○ |
| Example 2 | PE | 108 | 80 | ○ |
| Example 3 | PE | 106 | 120 | ○ |
| Example 4 | PE | 139 | 120 | ○ |
| Example 5 | PE | 136 | 160 | Δ |
| Example 6 | PE | 103 | 190 | × |
| Example 7 | PE | 136 | 200 | × |
| Example 8 | Aromatic polyamide | 407 | 40 | ○ |
| Example 9 | Aromatic polyamide | 376 | 80 | ○ |
| Example 10 | Aromatic polyamide | 349 | 160 | ○ |
| Example 11 | Nylon | 285 | 120 | ○ |
| Example 12 | Nylon | 285 | 180 | Δ |
| Example 13 | Nylon | 285 | 220 | × |
| Example 14 | Cotton | 548 | 40 | ○ |
| Example 15 | |
300 | 40 | ○ |
| Example 16 | Cotton | 695 | 80 | ○ |
| Example 17 | Cotton | 522 | 80 | ○ |
| Example 18 | Cotton | 280 | 80 | ○ |
| Example 19 | Cotton | 336 | 120 | ○ |
| Example 20 | Cotton | 274 | 120 | ○ |
| Example 21 | Cotton | 683 | 160 | ○ |
| Example 22 | |
500 | 160 | ○ |
| Example 23 | Cotton | 326 | 160 | ○ |
| Example 24 | Cotton | 264 | 160 | ○ |
| Example 25 | |
500 | 200 | Δ |
| Example 26 | Cotton | 683 | 240 | Δ |
| Example 27 | Cotton | 326 | 280 | × |
| Example 28 | Cotton | 264 | 280 | × |
| Example 29 | Cotton | 683 | 300 | × |
In table 1 and fig. 6, ". O" indicates that adhesion of the glass plates to each other was not confirmed and contact damage was not confirmed when the glass plates were taken out from the tray after the vibration test. In table 1 and fig. 6, "Δ" indicates that adhesion between the glass plates was confirmed and contact damage was confirmed when the glass plates were taken out from the tray after the vibration test, but adhesion was not confirmed and contact damage was not confirmed when the vibration test was not performed. In table 1 and fig. 6, "x" means that adhesion of the glass plates to each other was confirmed and contact damage was confirmed when the glass plates were taken out from the tray even if the vibration test was not performed.
As is clear from table 1 and fig. 6, when the formula (1) is satisfied, the occurrence of contact damage in the stationary state can be suppressed. As is clear from table 1 and fig. 6, when the above expression (2) is satisfied, the occurrence of contact damage in the vibrating state can be suppressed.
The glass laminate and the glass package of the present disclosure have been described above, but the present disclosure is not limited to the above embodiments and the like. Various changes, modifications, substitutions, additions, deletions, and combinations may be made within the scope of the claims. These are of course also within the technical scope of the present disclosure.
Claims (11)
1. A glass laminate comprising a plurality of glass plates stacked one on another and a linear spacer disposed between the adjacent glass plates or between the glass plates and a tray,
each of the glass plates is rectangular in plan view, has first and second sides parallel to each other and third and fourth sides parallel to each other,
the linear spacers extend at least from the third side to the fourth side in a first direction parallel to the first side and the second side, and are arranged at intervals in a second direction parallel to the third side and the fourth side,
the glass plate has a Young's modulus E (MPa) and a density rho (kg/mm) in the Nth sheet from above 3 ) Wherein the plate thickness is t (mm), the length of each of the first side and the second side is a (mm), N is an integer of 1 or more,
the thickness of the linear spacers in contact with the lower surface of the Nth glass plate counted from above is H (μm), the distance between the center lines of the linear spacers in the second direction is L (mm),
the following formula (1) is established,
[ mathematical formula 1 ]
2. The glass laminate according to claim 1,
the following formula (2) is satisfied,
[ mathematical formula 2 ]
H≥σ1×1.6…(2)。
3. The glass laminate according to claim 1 or 2,
the following formula (3) is satisfied,
[ math figure 3 ]
4. The glass laminate according to any one of claims 1 to 3,
a distance between the first edge of the glass plate and a center line of the linear spacer closest to the first edge in the second direction is L1 (mm) in relation to the linear spacer abutting against the lower surface of the glass plate in the nth sheet from above, where N is an integer of 1 or more,
the following formula (4) is established,
[ MATHEMATICAL FORMATION 4 ]
5. The glass laminate according to any one of claims 1 to 4,
t is 0.05mm to 2.0 mm.
6. The glass laminate according to claim 5,
t is 0.05mm to 0.6 mm.
7. The glass laminate according to any one of claims 1 to 6,
the glass plate is used for a display.
8. The glass laminate according to any one of claims 1 to 6,
the glass plate is a carrier substrate bonded to a semiconductor wafer.
9. The glass laminate according to any one of claims 1 to 8,
the length of each of the first and second edges of the glass sheet is longer than the length of each of the third and fourth edges,
the linear spacers are provided so as to be parallel to the long sides of the glass plate in a plan view.
10. A glass package comprising the glass laminate according to any one of claims 1 to 9 and a tray for supporting the glass laminate.
11. The glass package of claim 10,
the tray is a flat tray that horizontally supports each of the glass sheets.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021057331A JP2022154343A (en) | 2021-03-30 | 2021-03-30 | Glass laminated body, and glass packaging body |
| JP2021-057331 | 2021-03-30 |
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| Publication Number | Publication Date |
|---|---|
| CN115140431A true CN115140431A (en) | 2022-10-04 |
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|---|---|---|---|
| CN202210276428.3A Pending CN115140431A (en) | 2021-03-30 | 2022-03-21 | Glass laminate and glass package |
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| JP (1) | JP2022154343A (en) |
| KR (1) | KR20220136142A (en) |
| CN (1) | CN115140431A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007230610A (en) | 2006-03-01 | 2007-09-13 | Central Glass Co Ltd | Thread supply device and its method for spacer of glass sheet |
| JP6611196B2 (en) | 2016-03-31 | 2019-11-27 | 特種東海製紙株式会社 | Insert paper |
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- 2021-03-30 JP JP2021057331A patent/JP2022154343A/en active Pending
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- 2022-03-03 TW TW111107717A patent/TW202237478A/en unknown
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