DE10197125B3 - Embedding body for glass substrates and packaged article using the same - Google Patents

Abstract

The invention relates to an embedding body with L-shaped cross-section, in which the thickness at the end of the L is greater than in the corner portion. Specific constructions to meet this thickness requirement include the following: (1) Fastening guide grooves are formed so that their depth becomes deeper from the ends of the L to the corner portion, thereby reducing the thickness of the embedding body relative to the bottom portion of the base Fastener guide groove to gradually decrease from the ends of the L to the corner portion; (2) without the formation of fastener guide grooves, the embedding body is shaped so that its own thickness gradually decreases from the ends of the L to the corner portion; and (3) projections are formed on the outside of both ends of the L of the corner portion. When bonded together by a fastener, the potting body prevents concentration of the bonding force of the fastener in the corner portion.

Description

TECHNICAL TERRITORY

The The invention relates to an embedding body for protecting Glass substrates from a glass slide, on which an electronic part is made like a semiconductor device is due to damage of vibrations during of transport. The invention also relates to a packaged article, wherein a number of the above-mentioned glass substrates are common is packed.

BACKGROUND BUILDING TECHNOLOGY

In recent years, electronic or electrical components, in particular liquid displays or plasma displays, which are peripherals for PCs, and portable terminals, as represented by mobile phones are, components whose production rate is accompanied by the industrial Development of information technology represented by the Internet drastically increased. There was a lively demand for a technique embedment body to develop for the packaging or transportation of such Components are used. Among these components are glass substrates with electronic parts made thereon, such as semiconductor devices, z. For example Color filters, TFT liquid crystal cells (Substrates on which a circuit is made, in the thin-film transistors included) and liquid crystal panels used glass substrates, such a small thickness on that she while of transport bumper or susceptible to vibrations are, in addition to because Their extremely fine structure makes them difficult to handle are, vulnerable for influences of Outside are. In particular, glass substrates are prior to processing, or Semi-finished products before finished products, handled in this way; that the exposed electronic parts, which is why they are by static electricity or dust more disadvantageous which in some cases lose their function.

It Many packaging technologies have already been used for safe transport of glass substrates without damage as well as other substrates proposed.

So will in the JP 05319456 A an embedding body for glass substrates of a polyolefin bead foam body and having a substantially L-shaped cross section in accordance with the shape of a corner portion of the glass substrate, on the inside of which a number of substrate insertion grooves are formed along the L; On the outer surfaces Führungsnute are provided for a mounting material.

From the DE 4 235 371 C2 there is known a corrugated embedding body for arbitrary articles having a substantially L-shaped cross section in conformity with the shape of a corner portion of the article to be embedded, on the inside of which a number of fitting grooves are formed along the L, around two sides forming the corner section of a product, wherein the thickness of the embedding body gradually decreases from the two ends of the L to the central portion.

From the DE 101 04 313 C1 It was known that in a storage case for cassettes, a sloping bottom is provided, wherein the cassettes are held in a stable position.

As a further example of such a packaging technique, a technique is illustrated
as disclosed in Japanese Patent Laid-Open No. 319456/1993. The essence of this technique is an embedding body having a polyolefin bead foam body with specific properties that has a substantially L-shaped cross-section and a number of substrate insertion grooves in the inner surface along the L side. In packaging glass substrates, a number of them are arranged in parallel with each other at a predetermined interval so as to form a cuboid, and each corner of each substrate is inserted into the substrate insertion groove of the embedding bodies such that the four sides of the cuboid perpendicular to the substrate surface fit into the embedding body, whereupon fastening takes place, if necessary, with a fastening element such as an elastic holder or a band.

If but a fastening by applying a fastener like an elastic holder or a strap to the outside of the embedment body takes place, the binding force concentrates on the corner of the embedding body, so that the L of the embedding body expands and the glass substrates emerge from the substrate insertion grooves, whereby the protective function can not be fully exercised.

Also, in the above L-shaped embedding bodies, the width of the substrate insertion groove is equal to or slightly smaller than the thickness of the glass substrates, and the glass substrates are fixed by utilizing the highly elastic shape recovery of the polyolefin bead foam body after pressure, which is characteristic of the beads , While this is effective to prevent generation of dust by vibration and friction on glass substrates during transportation, the frictional resistance exerts on the glass substance advises adverse effects on the packaging of the glass substrates, which is the essential purpose, and if the glass substrates are forcibly inserted into the grooves, they bend because they are only a small thickness of about 0.4 to about 1.0 mm, lightweight, and they are susceptible to damage. Thus, a problem arises that much time is required if the process is carried out carefully to avoid such damage. The same applies to the unpacking of the substrates. In particular, automatic packaging and unpacking machines have recently been introduced to save labor, but the problem described above tends to be troublesome, and it has been demonstrated that L-shaped embedding bodies are not actually suitable for automation.

Further can upon insertion of the glass substrates into the substrate insertion grooves the frictional resistance force on the glass substrate surface is fine Scratch marks are generated, which is another problem.

in view of In the problems described above, it is an object of the invention to an embedding body for glass substrates to create, which prevents a glass substrate during packaging of glass substrates emerges from the groove in the end portion of the L of the embedding body and the glass substrate can surely protect even if an external force like a vibration or impact force Falling down during transport or handling. It is still Object of the invention to design the embedding body so that when tying by a fastener occurring deformation stresses absorbed and the expansion of the corner portion can be prevented.

Further It is also an object of the invention, an embedding body for glass substrates to automate the packing and unpacking of Glass substrates is suitable, which does not easily dust even then generated when it slides with friction against a glass substrate, and the one about outstanding resistance features, so that it can be used several times. Still further, it is one Object of the invention, a produced using the embedding body to produce packaged object.

The explained above The object is achieved by the features independent claims 1, 3, 4, 9 and 10 solved.

advantageous Embodiments describe the subclaims.

According to one first appearance is the embedding body according to the invention for glass substrates a polyolefin bead foam body with im Essentially L-shaped Cross section in accordance with the shape of a corner portion of the glass substrate, wherein at the The inside thereof along a number of substrate insertion grooves L is formed around two, the corner portion forming sides to fix the glass substrate, and wherein on an outer side the same along the L at least one fastener guide groove is formed, wherein the thickness of the embedding body based on the bottom portion of the fastener guide groove from both ends of the L gradually towards the corner section is reduced.

Of the has the above-mentioned first embedding body according to the invention, as a preferred embodiment, such an embodiment on, in which the bottom portion of the fastener guide groove Chamfered in the corner section.

According to one second appearance is the embedding body according to the invention for glass substrates of a polyolefin bead foam body and with substantially L-shaped cross-section in accordance with the shape of a corner portion of the glass substrate, wherein at the The inside thereof along a number of substrate insertion grooves L is formed around two, the corner portion forming sides to fix the glass substrate, wherein the thickness of the embedding body of the two ends of the L gradually reduced towards the corner portion.

According to one third embodiment, the embedding body according to the invention for glass substrates of a polyolefin bead foam body and with substantially L-shaped cross-section in accordance with the shape of a corner portion of the glass substrate, wherein at the The inside thereof along a number of substrate insertion grooves L is formed around two, the corner portion forming sides to fix the glass substrate, wherein projections on the outside at the two ends of the L are formed.

Of the The above-mentioned second and third invention A bedding body for glass substrates has, as preferred embodiments, over embodiments, in which an outer corner section is chamfered.

In addition, among the embedding bodies of the present invention given above, preferred embodiments include the following: an embodiment in which a notched groove is formed inside the embedding body in a direction perpendicular to the substrate insertion grooves; an embodiment in which the embedding body a maximum thickness of 10 to 60 mm and a ratio of the two sides forming the L of 1.0 to 3.0 with respect to the shorter side and in which the substrate insertion grooves have a width of 1.0 to 4.0 times the thickness of the glass substrate, have a depth of 3 to 15 mm and a groove pitch of 6 to 100 mm; and an embodiment in which the polyolefin bead foam body contains foamed particles having an average particle size of 1.5 to 5.0 mm, and has a melt rate of 70% or more, an elastic compression ratio of 3.9 to 490, and a shape recovery rate of 60 % or more.

Of the Packaged according to the invention Item shows, according to a first appearance, characteristics such that a number of glass substrates parallel to each other at a predetermined interval is arranged to form a cuboid, wherein the corner portion of the respective substrates in the substrate insertion groove of the first embedding body for glass substrates is inserted to thereby the four sides of the cuboid perpendicular to the area of the embedding body run into these, and the bundle thereby is fastened that a connection by a long fastener takes place along the fastener guide groove of the embedding body.

Of the Packaged according to the invention Item shows, according to a second appearance, features in that a number of glass substrates parallel to each other at a predetermined interval is arranged to form a cuboid, wherein the corner portion the respective substrates in the substrate insertion groove of the second or third embedding body for glass substrates is inserted, thereby the four sides of the cuboid, the right angle to the surface of the embedding body run into these, and the bundle thereby is fastened that a connection by a long fastener along the outside of the L of the embedding body he follows.

SHORT DESCRIPTION THE DRAWINGS

1 is a perspective view showing an embodiment of the embedding body according to the invention.

2 Fig. 10 is a perspective view showing an embodiment of the packaged article according to the present invention.

3 (a) to 3 (e) are sectional diagrams showing embodiments of the embedding body according to the invention.

4 (a) to 4 (c) Fig. 11 are sectional diagrams showing examples of the structure of the substrate insertion groove of the embedding body of the present invention.

In addition, in the drawings, the number indicates 1 an embedding body; 2 a substrate insertion groove; 3 a fastener guide groove; 4 a lead; 21 a glass substrate; 22 a fastener; 31 a wall surface of the embedding body; 32 a bottom portion of the substrate insertion groove; 33 an end of the L; 34 and 34 ' a corner portion of the L; 35 a bottom portion of the fastener guide groove; 36 a chamfered section; 37 a notched groove; 38 a lead and 39 a depression.

BEST TYPE TO EXECUTE THE INVENTION

Of the inventive embedding body a polyolefin bead foam body having a substantially L-shaped cross section shows the feature that its thickness at the end of the L larger than that in its corner section is. As a result, when glass substrates are packaged, followed by bonding of the bunch by a fastener from the outside, the fastener at the end of the L at an outermost position as in the corner section, which serves to prevent the binding force of the Fastener concentrated in the corner portion, whereby it is possible that the binding force is even press the entire embedding body to thereby protecting the glass substrates.

• (1) Befestigungselement-Führungsnuten sind so ausgebildet, dass ihre Tiefe von den Enden des L zum Eckabschnitt hin größer wird, um dadurch die Dicke des Einbettungskörpers im Bodenabschnitt der Befestigungselement-Führungsnut allmählich ausgehend von den Enden des L zum Eckabschnitt hin zu verringern;
• (2) Der Einbettungskörper wird, ohne dass die Befestigungselement-Führungsnuten ausgebildet werden, so geformt, dass sich seine Dicke selbst allmählich von den Enden des L zum Eckabschnitt verringert; und
• (3) Vorsprünge werden außerhalb an den beiden Enden des L des Einbettungskörpers ausgebildet.

In the invention, special constructions in which the thickness of the embedding body at the end of the L is greater than in the corner portion are the following:

• (1) fastener guide grooves are formed so as to increase in their depth from the ends of the L to the corner portion to thereby gradually reduce the thickness of the embedment body in the bottom portion of the fastener guide groove from the ends of the L to the corner portion;
• (2) The embedding body, without forming the fastener guide grooves, is formed so that its thickness itself gradually decreases from the ends of the L to the corner portion; and
• (3) Projections are formed outside at both ends of the L of the embedding body.

Of the embedment body and the packaged article having a number of glass substrates are integrally packaged using the embedding body specifically described below with reference to embodiments.

The 1 Fig. 15 is a perspective view showing an embodiment of the embedding body of the invention having the construction described in the above item (1). In the 1 denotes the number 1 an embedding body; 2 a substrate insertion groove; 3 a fastener guide groove and 4 a projection separating adjacent substrate insertion grooves from each other.

The 2 Figure 11 is a perspective view showing an embodiment of the packaged article of the invention in which a number of glass substrates are packaged using four embedding bodies of the invention. In the 2 denotes the number 21 a glass substrate, and the number 22 denotes a fastener, and the same numbers as in the 1 denote the same elements.

The embedding body according to the invention 1 acts so that it covers the corner portions of the glass substrates 21 protects and integrally fixes a number thereof, wherein the packaging is carried out using two or more, preferably four, embedding bodies.

As it is in the 1 is shown, the embedding body according to the invention has 1 about a substantially L-shaped cross section, in accordance with the shape of the corner portion of a glass substrate, and to fix two sides constituting the corner portion of a glass substrate are a number of substrate insertion grooves 2 present along the L in a state in which they pass through the protrusions 4 are separated from each other.

Also, in the structure according to the above-described item (1), the fastener guide groove 3 formed along the L As it is in the 2 is shown, the fastener guide groove 3 used the packaged glass substrates 21 zusammenzubinden by that the fastener 22 along the fastener guide groove 3 is wound up. In the invention, in the case of attaching the fastener guide groove 3 the thickness of the embedding body 1 changed so that it gradually decreases in the bottom section to the corner section. The 3 (a) schematically shows the cross section of the embedding body 1 of the 1 along the fastener guide groove 3 and the substrate insertion groove 2 , In the 3 denotes the number 31 the outside of the embedding body 1 ; 32 the bottom portion of the substrate insertion groove 2 ; 33 the end of the L of the embedding body 1 ; 34 and 34 ' the corner sections of the L; 35 the bottom portion of the fastener guide groove 3 ; 36 the chamfered section; 37 the notch groove; 38 the lead and 39 the depression. In addition, in the following description, the thickness in the corner portion means 34 or 34 ' the thickness of the embedding body on the shorter side and the longer side in the inner corner portion of the L.

As it is in the 3 (a) is shown, takes the thickness of the embedding body in the bottom section 35 the fastener guide groove from the end 33 of the L gradually to the corner section 34 ' from that the fastener guide groove is formed so that its depth at the end 33 the L is smaller while in the associated corner section 34 ' is larger. As a result, upon winding a long fastener along the fastener guide groove after packaging the glass substrates, the distance from the fastener to the glass substrate is at the end 33 larger than in the corner section 34 ' , which serves to prevent the binding force of the fastener on the corner portion 34 ' concentrated.

Also, it is preferable to prevent the bonding force of the fastener from affecting the corner portion 34 ' of the bottom section 35 the fastener guide groove concentrates beforehand to chamfer to a chamfered portion 36 to train as he is in the 3 (b) is shown. By making the chamfered section 36 eliminates the possibility that the fastener burrows into the embedding body and damage it, and the deforming deflection in the corner section 34 ' is reduced, which helps to reduce the force leading to a widening of the corner sections 33 of the embedding body leads to the outside. The chamfered section 36 can be flat or curved.

Moreover, it is preferred as it is in the 3 (c) is shown on the inside of the embedding body in the direction perpendicular to the substrate insertion groove (direction perpendicular to the paper plane) one or more notched grooves 37 form, which, when a bonding is performed by the fastener, the deformation stress concerning the expansion of the corner portion 33 absorb to the outside and prevent the tension to the corner section 33 spread. In addition, the notch groove 37 be substantially U-shaped, but also substantially V-shaped, as in the 3 (c) is shown.

Also in the 3 the lead 4 at the interior of the corner section 34 partially removed on the shorter side to a recess 39 to build. This is a structure designed to prevent breakage of a glass substrate in the corner portion which is most susceptible to damage when subjected to impact forces due to vibration or dropping during transportation. In addition, it is enough in the depression 39 from that the lead 4 to the bottom section 32 the substrate Setznut is removed. In addition, in order to prevent the glass substrate from being broken in its corner portion, it is preferable to make the recess deeper than the bottom portion 32 train.

In the 3 (d) an example of the invention with the above construction (2) is shown, in which the end 33 of the L of the embedding body thicker than in the corner section 34 is, and in the 3 (e) an example of the structure (3) is shown. In the 3 (d) the embedding body is formed so that the thickness of this embedding body itself gradually from the end 33 of the L to the corner section 34 decreases. In this case, no fastener guide grooves are specially formed, and accordingly, the width and the binding position of the fastener can be freely selected. Also is in the 3 (e) a lead 38 on the outside of the end 33 of the L, and as a result, the thickness of the embedding body is at its end 33 larger than in the corner section 34 , The lead 38 can be made in one piece with the embedding body, or it can be made by attaching a separately prepared plate to the embedding body by heat welding or by means of an adhesive. In the latter case, the plate may be made of a material that matches that of the embedding body, or it may be different.

Also it is with the constructions of 3 (d) and 3 (e) possible, the chamfered section 36 or the notched groove 37 , like in the 3 (b) or the 3 (c) shown, suitable form.

When next hereinafter preferred outer dimensions of the embedding body according to the invention are described.

The relationship the lengths the two sides of the L (lengths the portions with which the glass substrate contacts) is preferably 1.0 or more, more preferably 3.0 or less, based on the length of shorter Page. If the ratio within this range are the longer and the shorter side in good balance, and rectangular glass substrates can with extremely good stability be fixed. Furthermore is the possibility damage the glass substrates greatly reduced due to sagging. The relationship is even more preferably less than 2.7.

If the relationship is within the above range, the length of the shorter side is preferably 10 % or more, more preferably 45% or less, of the length of the shorter Side of the glass substrate to be packaged. Furthermore, 15% or more even more preferable, and 40% or less are most preferable. If the length the shorter one Side of the embedding body within the range specified above, the risk of destruction of the Glass substrate can be avoided even if there is an impact force Falling or the like learns, since the embedding body available are the ones pushing power can absorb sufficiently. Furthermore can, since the load acting on the embedding body (weight of the Glass substrates), the generation of dust during the Transports are suppressed by contact friction when vibrating, which also achieves satisfactory cleanliness.

Regarding specific dimensions of the embedding body, the length of the shorter side is preferably 100 mm or more, more preferably 500 mm or less. The length of the longer Page is preferably 100 mm or more, more preferably 500 mm or less. Also amounts the length in the direction perpendicular to the shorter side and the longer side preferably 150 mm or more, more preferably 600 mm or less, however, this depends on the number of glass substrates to be packaged.

in view of the size and the Weight of the glass substrates, the number of glass substrates to be packaged and the elastic compression exponent of the embedding body is the maximum thickness the embedding body according to the invention more preferred 10 mm or more, more preferably 60 mm or less, with 15 mm or more and / or 40 mm or less is more preferable. If the external dimensions and the maximum thickness are within the ranges indicated above, can they embedment body used as such, providing a stable fixation of all glass substrate products allow different dimensions, and they can also be used as an embedding body for glass substrates used for processing. Besides, they can show the function that they have glass substrates during sufficiently protect the transport against shocks.

Also, in the case of producing the fastener guide groove as shown in FIG 3 (a) the depth thereof is preferably 0.5 mm or more, more preferably 5 mm or less at the end 33 , and in the corner section 34 ' it is preferably 2 mm or more, more preferably 15 mm or less. Of course, if the fastener guide groove is made to fall within the above-specified range, a positional deviation of the fastener is prevented and because the bonding force is applied evenly over the entire length of the shorter and longer side of the embedment body when the bundle is bound by the fastener, a leg extension deformation of the embedding body can be prevented, so that the four corner portions of the glass substrates are stably fixed. the According to the embedding body exercise a satisfactory protective function for glass substrates. In the 3 (a) is the fastener guide groove to the end 33 educated. The fastener guide groove may be formed to be near the end 33 the same plane as the outer wall 31 of the embedding body. In this case, the fastener guide groove is preferably 10 mm or more from the end 33 spaced. More preferably, the fastener guide groove is formed so that its depth from the position to the 100 mm or less from the end 33 is gradually, gradually to the corner portion 34 ' increases. Within this range, positional deviation of the fastener during transportation does not occur, and in addition, the same effects as achieved when the fastener guide groove extends from the end 33 will be produced.

Further, in the case of changing the thickness of the embedding body itself, as shown in FIG 3 (d) is shown, preferably, the thickness in the corner section 34 by 1 mm or more, more preferably 10 mm or less, even more preferably 3 mm or more, most preferably 8 mm or less, smaller than that in the end portion 33 train. Also in this case, the same effect as described above can be obtained by making the embedding body having the uniform thickness of the end portion 33 is made to the position which is 10 mm or more, more preferably 100 mm or less, away from the end portion 33 to the corner section 34 towards, with gradually reducing the thickness of the embedding body from this position to the corner portion 34 out.

Also it is in the case of 3 (e) preferred, the corner section 34 by 1 mm or more, more preferably by 10 mm or less, thinner than the end portion 33 close. As a measure, around the corner section 34 make thinner, the lead becomes 38 near the end section 33 trained as it is in the 3 (e) is shown. The width of the projection 38 in the direction along the L is preferably 10 mm or more, more preferably 100 mm or less, still more preferably 20 mm or more, most preferably 80 mm or less.

Further, in the case of producing the chamfered portion 36 as he is in the 3 (b) is shown, the length of the arc or the line thereof in the L-shaped cross section is preferably 3 mm or more, more preferably 60 mm or less, considering the elastic compression exponent, the maximum thickness and the length of both sides of the embedding body.

If chamfering within this range can be a concentration the binding force of the fastener on the corner portion at Packaging glass substrates and binding the bundle together Wrap around the fastener are avoided, and accordingly the embedding bodies evenly pressed to to fix the corner sections of the glass substrates. Thus, an enhanced function of the Fixing and protecting the glass substrates are obtained, and moreover, even if that Fastener is tightened with a strong binding force, prevents it from digging into the embedding bodies. Accordingly, the embedding bodies can be repeated for one longer Period, and it becomes a noticeably improved durability achieved.

If the notched groove 37 is made as it is in the 3 (c) is shown, the depth of the same preference, 1/20 or more, preferably 1/2 or less, the thickness of the embedding body in the section in which this notched groove 37 will be produced. The width of the groove is preferably 2 mm or more, more preferably 10 mm or less. It also exists for the position and the number of notched grooves 37 no particular limitation, but their position is preferably 1/8 or more, more preferably 4/5 or less, of the length of the corner portion (the point at which the portions of the longer and shorter sides, which are in contact with the glass substrate, in FIG Contact) spaced side (the length of the portion with which the glass substrate contacts), and the number is preferably 1 or more, more preferably 3 or less. If the notched groove 37 is prepared within the above ranges, the glass substrates are used with sufficient fixability over the full length of Substrateinsetznut, without the stability of the embedding body would be impaired. Thus, the protective function for the glass substrates is improved, and also the effect of further reducing the generation of dust by friction with the embedding bodies is achieved.

Further, in the case of manufacturing the recess 39 , like in the 3 represented, preferred, this depression 39 to manufacture so that the bottom portion of the same recess 32 of the substrate insertion groove, and more preferably, taking into consideration the size and thickness of the glass substrate and the maximum thickness of the embedding body, the recess is to a depth of 1 mm or more and 8 mm or less, most preferably 2 mm or more and 6 mm or less, starting from the bottom portion of the substrate insertion groove 32 produced. Within these ranges, no external force is applied to the most fragile corner portion of the glass substrate even if the embedding bodies undergo deflection deformation due to a collision by dropping, whereby the possibility of damage to the glass substrate is extremely reduced. In addition, the structural strength of the embedding bodies is also sufficiently preserved, and accordingly they can maintain their initial shape even after repeated use. Therefore, they can exhibit the function of fixing and protecting the glass substrates for a long period of time.

The Width of the embedment body formed in the invention Substrate insertion is preferably the 1.0- to 4.0 times, more preferably 1.2 to 3.5 times that of packaging glass substrates. Within these areas can work the insertion and removal of the glass substrates by hand or by an automatic device can be run quickly and with good efficiency, and difficulties in breaking the glass substrates at the insertion work are noticeably reduced. Besides that is the fixability of the glass substrate in the substrate insertion groove sufficient that even if shocks due to vibrations on it acting, friction between the glass substrate and the embedding body is suppressed, whereby little dust is generated and the glass substrate is kept clean.

Also is the depth of the substrate insertion groove is preferably 3 mm or more, more preferably 15 mm or less, taking into account the size and the Weight of the glass substrate, the elastic compression exponent of the embedding body and the width of the substrate insertion groove. More preferably, it is 5 mm or more, most preferably 10 mm or less. Within this Areas can the glass substrates even then safely in their in the insertion grooves be kept in the inserted state, if they are bumped during transport Vibrations or during handling shocks through Dropping down, and thus problems of breakage, when the glass substrates get out of the insertion grooves and adjacent ones Substrates come into contact, can be prevented. There is also, there the part of the glass substrate in contact with the substrate insertion groove always in frictional contact with the embedding body, an extremely high probability for this, that by shocks by vibrations while transport on the surface the glass substrate fine scrub marks arise. Accordingly, it is when processing a transported glass substrate for manufacturing a liquid crystal panel usual, before to cut off that part of the substrate which is in contact with the insertion groove of the embedding body came into contact. However, if the depth of the groove within the the area of the part is extremely small, and a reduction in the yield can be minimized, thereby high productivity is achieved. Further, the amount of friction between the Glass substrate and the embedding body produced dust small, so that the embedding body also considering the cleanliness desirable is.

Under consideration the type of glass substrate (eg glass itself, color filter, liquid crystal module, Liquid crystal and plasma display panel), the size and the Weight of the glass substrate, the elastic compression exponent the embedding body, the width of the substrate insertion groove and the adaptability to automatic Insertion and removal of the glass substrate is the pitch of the substrate insertion grooves preferably 6 mm or more, more preferably 100 mm or less. Within this Area can the work for inserting or removing the substrates easy and executed safely be, and besides The risk of the glass substrate being crushed by impact can be avoided Vibrations during of transport or shocks Fall down during handling, in contact with the adjacent substrate passes, is bent.

Also, in the embedding body of the present invention, the protrusions separating adjacent substrates from each other have a cross-sectional shape in which the upper surface is flat as shown in FIG 4 (a) is shown. However, considering the workability in inserting the glass substrates and the generation of dust at the time of insertion, a two-stage mold is preferable in which a guide portion such as a convex is formed on the top of the protrusion. 4 (b) ) or a trapezoidal shape ( 4 (c) ), the trapezoidal shape being preferred. Even if small-pitch substrate insertion grooves are formed in the embedding body, a metal mold for molding the embedding body within the mold can be manufactured with high accuracy. In the figures, t1 represents the maximum thickness of the embedding body 1 ; t2, the depth of the substrate insertion groove; t3 the width of the groove and t4 the groove pitch.

When next Materials for producing the embedding body according to the invention are described below.

The embedding body according to the invention consists of a polyolefin bead foam body. The foam body is obtained by filling foamable polyolefin beads in a metal mold of a desired shape, heating them with steam for foaming, and then cooling them to obtain a molded foam of a desired shape. As the metal mold to be used for the molding, there may be used one obtained by a casting method. The casting process makes it possible to use metal molds complicated structure in a simple manner to produce with high accuracy, and in addition the manufacturing costs 1/10 or less of those for metal molds for injection molding conditions, whereby economics and suitability for mass production consists.

The Polyolefin to be used for producing the polyolefin bead foam body can from networked or non-networked Be a type. As specific examples of materials for the resin Illustratively, the following are indicated: Polyethylene Resins low density polyethylene, medium density polyethylene, High density polyethylene, linear low density polyethylene, linear Ultra-low density polyethylene, polyethylene produced using a metallocene catalyst, and ethylene-vinyl acetate copolymer represents are, random and block polypropylene copolymer resins between a copolymerizable Component of ethylene, butene-1 or 4-methylpentene-1 and propylene, Random polypropylene copolymer resins made using a Metallocene catalyst and a composition are obtained by blending two or more of the resins described above is obtained.

Of these, polyethylene resins having a resin density of 0.927 g / cm ³ or more are preferable, with polyethylene resins having a resin density of 0.970 g / cm ³ or less and random copolymer polypropylene resins being more preferable between ethylene or butene-1 and propylene. When the density of the polyethylene resin is within the above-specified range, the resulting embedding body exhibits suitable physical properties such as stability, flexibility and shape recovery, and exhibits marked practical operability such as markedly improved dimensional stability, dropping shock absorption performance, repeated durability Use as well as properties to prevent the generation of dust. Also, in order to obtain a special elastic compression exponent, the expansion ratio of the embedding bodies can be increased to a relatively higher value, which helps to lower the weight and the manufacturing cost of the embedding bodies. In addition, random copolymer-propylene resins between ethylene or butene-1 and propylene because they have higher elasticity than polyethylene resins are suitable for embedding bodies for larger glass substrates, and they exhibit such excellent dimensional stability that they maintain their initial shape even after repeated use over a long period of time so they are preferred.

One first requirement for the embedding body according to the invention A polyolefin bead foam body is that the the embedding body forming foam particles have an average particle size of preferably 1.5 mm or more, more preferably 5.0 mm or less. Yet is more preferred the size 2.0 mm or more, and most preferably it is 4.5 mm or less. When the mean particle size within of these areas is the ratio of the surface to the Volume of a foam particle so small that a pressure reduction of gas (air) within the particles in steam heating at Forming inside the mold is extremely small, allowing sufficient Foam expansion by heating is realized. As a result, between foam particles, the on the surface of the foam body obtained by molding in the mold, hardly any small gaps formed, and when the embedding body for transporting Glass substrates are used, no dust from the air into the section, resulting in excellent cleanliness can. Also can when filling the foamable Particles into the metal mold same even in the fine section the substrate insertion grooves are filled with a small width, and accordingly, embedment bodies can be used with high accuracy in accordance with the shape and the dimension of the metal mold.

In addition, the mean particle size of the foam beads is a value obtained by drawing three 100 mm-long lines on the surface of the molded parts, measuring the number of the foamed particles in contact with the line, and the average particle size C (mm) is calculated according to the following formula (A). In addition, the value is the mean of the values obtained for the three lines. C = 1.626 × L) / N (A) with L: length of the center line (mm);
N: number of particles

One second requirement for the embedding body according to the invention A polyolefin bead foam body is in physical Properties of the same. This means that the embedding body a Melt rate of preferably 70 or more, an elastic compression exponent of preferably 3.9 or more (more preferably 490 or less) and one Shape recovery rate of preferably 60% or more.

In addition, the above-described melting rate is a numerical value obtained by making a cut of about 1 mm in the thickness direction in the embedding body, folding the embedding body so that the cut points to the outside to break the on total number of foamed particles and the number of broken particles in the area of the broken section over the full length in the depth direction and over about 55 mm in the longitudinal direction is measured, the number of the broken particles is divided by the number of the whole foamed particles and thus calculated value is represented in percent. In the invention, when the fusion rate is 70% or more, mechanical strength properties such as the compression strength and the tensile strength inherent in the polyolefin bead foam body can be fully realized. That is, an embedding body having excellent durability and shape recovery is obtained because countless foamed particles constituting the embedding body are strongly fused to be integrated. Accordingly, in the case of fixing and packaging glass substrates using the embedding bodies of the present invention, the embedding bodies can sufficiently hold the strong bonding force of the fastening member, so that high-level glass substrates can be fixed and packaged and the likelihood that the glass substrates are broken is greatly reduced. Further, between the foamed particles on the surface of the embedding body, there are no fine gaps, and the embedding body exhibits substantially no water absorbing properties substantially in washing with water to be repeated every time after use, which provides the advantage of excellent drying work.

Also can, when the elastic compression exponent of the embedding body within of the above range, the polyolefin is its own maximum damping property show, and the embedding body also has good balanced stability and flexibility. In particular, you can even big ones Substrates with a glass substrate dimension of 500 mm x 600 mm or bigger extremely stable and stable. Besides suffers the embedding body, since he over has sufficient strength, to withstand an external force, as during the Transporting or handling it, only a small deformation, and he shows sufficient durability for this, that he has one long period of time can be used repeatedly. Also, that can expansion ratio of the embedding body to achieve a special elastic compression exponent to a comparatively higher one Value can be raised, which serves the weight and the manufacturing costs of the embedding body to lower.

Further shows the embedding body, because the elastic compression exponent in the above Area and the shape recovery rate is 60% or more excellent resistance against repeated use, which is probably the maximum Property of the polyolefin bead foam body is, and a deformation can be minimized even if the frequency of use gets high.

In addition, the above-mentioned elastic compression exponent is a value obtained by dividing the compression elasticity (N / cm ² ) by the expansion ratio.

The Compression elasticity described above is a value obtained by a Sample was determined, the expansion ratio of which is described below Way according to JIS K7220 was measured, the compression rate 10 mm / min. amounted to. at a sample with a thickness of less than 20 mm will require several samples to a thickness of about 20 mm for the measurement piled up.

The expansion ratio is obtained by cutting out a flat sample of 50 mm width, 50 mm length and 20 mm thickness from the embedding body, measuring the weight (g) of the sample of the order of 10 mg, the width, the length and the thickness of the sample is measured by a vernier caliper to calculate the volume (cm ³ ), and the expansion ratio E (cm ³ / g) is calculated according to the following formula (B): E = volume / weight (cm 3 / g) (B)

The shape recovery is obtained by cutting out a flat sample of 50 mm width, 50 mm length and 20 mm thickness from the embedding body, the sample with a compression speed of 10 mm / min. using a Autograph AG-5000D compression tester manufactured by Shimazu Seisaku-sho KK, compressed to a thickness of 50%, then immediately taking the load at the same speed, measuring the thickness at which the load becomes zero, and the shape recovery rate R (%) is calculated according to the formula (C) below. In addition, for a sample less than 20 mm thick, several samples are stacked up to a thickness of approximately 20 mm for the measurement. R = (T1 / T0) × 100 (%) (C) with T0: thickness (mm) before the test;
T1: thickness (mm) after the test (when the load becomes zero)

Next, the packaged article of the present invention will be described below. The packaged article according to the invention is prepared by packaging a number of glass substrates using two or more embedding bodies of the invention as a set, preferably four embedding bodies as a set. That is, a number of the glass substrates positioned in parallel with each other at a predetermined interval are arranged so as to form a parallelepiped, each corner portion of the respective substrate being inserted into the substrate insertion groove of the embedding body of the present invention to make the four sides of the parallelepiped rectangular Insert substrate surface in the embedding body. Then, a long fastener is wound around the block along the L of the potting body to effect bonding. When the embedding bodies have fastener guide grooves, the fastener is wound along the fastener guide grooves.

In addition, can as extreme Glass substrate to be attached to an auxiliary glass substrate.

Below Other embodiments of the packed article with glass substrates using the embedding body according to the invention, the do not correspond to the packaged article described above, described.

A Number of glass substrates becomes in parallel position arranged at a predetermined interval to a cuboid form, wherein each corner portion of the respective substrates in the Substrate insertion of the embedding body according to the invention used is going to be the four sides of the cuboid at right angles to the area of the Substrate in the embedding body use. Then a long fastener along the L the embedding body wound around the cuboid to accomplish a binding and fixing. To the manufacture of the packaged article this is with a Heat shrinkable resin film wrapped and then heat treated, for a heat shrinkage to do the film whereby the packaged article is packaged by heat shrinking.

In addition, can the packaged article in the case of wrapping the same with the above indicated heat shrinkable resin film in a bag-shaped or cylindrical Are placed film, preferably after heat welding of the End portion of the film, and the film can be subjected to heat shrinkage so that it adheres tightly to the wrapped object.

Of the The packaged article described above has the feature that for a packaged article, in which a number of glass substrates under Use of the embedding body according to the invention integral is packaged using a heat shrinking film a heat shrinking operation undergoing what makes it possible the wrapping work for the to facilitate packaging of the packaged item even on large glass substrates, and it allows automatic wrapping. Furthermore shows the heat shrinkage film when wrapped packaged item no looseness, and therefore exists no way, that the outermost substrate In the packaged article, the film comes into contact with the film Dirty glass substrate. Accordingly, it is not necessary to Use auxiliary substrate, and the embedding bodies can be used effectively. Furthermore, thanks to the tensile stresses of the film all embedding body of Outside pressed, and accordingly the embedding bodies and the glass substrates fixed well integrally, which serves to prevent the glass substrates escape from the grooves or they are damaged. Furthermore the frictional contact between the glass substrate and the embedding body is through Vibrations during of transport so reduced that generation of scrub marks on the glass substrates or the deposition of dust prevented can be, whereby the cleanliness of the glass substrates is maintained. When shrink wrapping heat shrinkable resin film to be used Illustrative are polyolefin and polyvinyl chloride resin films specified. However contains Polyvinyl chloride resin various plasticizers and stabilizers in big Amounts to be used in extrusion film formation because of the associated properties, Workability and flexibility to achieve. These additives can over time to escape to the film surface, or you can yourself at normal temperature the effect of evaporation with extreme show small amount. Accordingly, they can the cleanliness of the work surface for wrapping affect the glass substrates, or you can lead to a fatal pollution problem the additive used in handling the packaged article during envelop On the hands adheres, in turn comes into contact with the glass substrates. Besides that is While it is preferable to heat-weld the film to seal the packaged item to prevent penetration of dust during transport from outside However, polyvinyl chloride resin shows poor adaptability at heat fusion, and it is an expensive device such as an ultrasonic wave device or a high frequency sealing device required. That's the way it is preferred to use polyolefin resin films.

When Polyolefin resin films can single-layer or multi-layer polypropylene resin products or polyethylene resin, wherein the resin is crosslinked or is not networked.

such Polyolefin resin films have a heat shrinkage ratio of 120 ° C in the longitudinal and / or transverse directions 15% or more, more preferably 90% or less. Most preferred is the heat shrinkage ratio 20 % or more. More preferably, it is in the longitudinal and the Transverse direction 15% or more and 90% or less. If the packed Subject of a heat shrinking process undergone within these areas, he can without loosening tightly heat-shrunk and thus exists no risk of the glass substrates due to contact between them and the movie gets dirty. In addition, the heat shrinkage ratio is one Value obtained by measurement at 120 ° C according to ASTM D-2732 becomes.

Also, the maximum heat shrinkage stress at 120 ° C is preferably 0.15 N / mm ² or more, preferably 5 N / mm ² or less in the transverse and / or longitudinal direction. Most preferably, it is 0.2 N / mm ² or more and 4.5 N / mm ² or less. More preferably, it is 0.15 N / mm ² or more and 5 N / mm ² or less in the transverse and longitudinal directions.

If the maximum heat shrinkage stress at 120 ° C is in the above ranges, the packaged item heat-shrunk tightly without looseness be, and even if during the handling pressed on the film it does not readily contact the glass substrate, causing the cleanliness of the same is maintained. In addition, the film is wrapped in the Corner section not destroyed, because the heat shrink tension shows a suitable value and a sealed wrapping can be carried out, to prevent the ingress of dust from the outside.

Besides that is the maximum heat shrinkage stress a value obtained by measuring at 120 ° C according to ASTM D-2838.

Further is the thickness of the polyolefin resin films is preferably 10 μm or more, more preferably 200 μm Or less. More preferably, the thickness is 20 μm or more, most preferably 180 μm or fewer. If the thickness is within these ranges, the film has one suitable body, and accordingly, the Einhüllarbeit for the packed Carefully, simple and effective become. Also, the heat sealing can with high welding strength accomplished and the film shows sufficient breaking strength to withstand impacts during the process Transport or handling to keep up.

When Fastening element, as used in the invention can Any long cord or band can be used. To the For example, a band of polypropylene is preferably used.

The Become embedding body according to the invention used as a set of four of them. The four embedding bodies can exactly have the same shape, or they may be different from each other Show shapes. If z. B. large Glass substrates can be packed as an embedding body, which are positioned in the lower part, uses larger and thicker embedding bodies to withstand the weight of the glass substrates.

In addition, in addition to Use of the embedding body according to the invention as Set of four of the same, as described above, the embedding body according to the invention the following ways are used. Namely, two embedding body according to the invention in Bottom section of the inside of a plastic container or a corrugated plastic box with an upper opening in opposite Directions using holding elements to prevent one Migration of the embedding body and glass substrates are made from the top opening used for fixation. If necessary, the upper opening can through To close a lid to prevent the ingress of dust. This procedure can be used to protect the glass substrates become. In this case, you can the containers also be used for transport, if the embedding body according to the invention or flat plastic foams attached to the lid.

EXAMPLES

Example 1 and Reference Example 1

(Glass substrates)

• Mother glass for a liquid crystal display Dimensions: 600 mm × 720 mm Thickness: 0.7 mm

(Foam)

Resin material:

• Ethylene-propylene random copolymer with 20 cm ³ / g as expansion ratio; average particle size of the foam resin particles: 3.6 mm. Melting rate: 86 g Elastic compression exponent: 549 N / cm ²

(Embedment body)

• Number of glass substrates to be packaged: 26
• External dimensions: Shorter side: 250 mm Longer side: 350 mm Length (perpendicular to the shorter and longer side): 300 mm Maximum thickness: 32 mm
• Substrateinsetznut: Width: 2.4 mm Depth: 12 mm Increment: 20 mm
• Protrusion shape: Vertical walls of 6.5 mm from the bottom portion of the substrate insertion groove and having a trapezoidal top having a width of 8 mm of the flat portion and a height of 5.5 mm (shape as defined by the Figs 4 (c) is shown)

(Fastener guide groove)

Two Fastener guide grooves were with a width of 30 mm at the positions formed around 1/4 of the length given above (300 mm) of the embedding body spaced from the two sides. The depth of the grooves was in the End portion of the L 1 mm, and it was an arcuate chamfering with formed a radius of 20 mm, the depth at the junction between the bottom portion of the groove and the chamfering section 4 mm was.

(Free drop test)

The glass substrates were packed using four embedding bodies as described above, as described in U.S. Pat 2 is shown to produce a packaged item. To evaluate the damping properties of the embedding bodies in the packaged article, this was subjected to a free fall test. In addition, as Reference Example 1, the same test was carried out using the same embedding bodies except for a fusion rate of 65%.

Test conditions:

• Head: 30 cm
• incident of the packaged article: only the footprint of the same
• Number of cases: 3 times

Of the The packaged article of Example 1 suffered even after three times Dropping no leakage of the glass substrates, and before the Test present packaging condition was maintained without that damages revealed. Also showed up with regard to the deposition of dust the embedding body on the surface the glass substrates no visible dust.

Of the Packaged article of Reference Example 1 suffered in the corner section of the glass substrate in contact with the groove in the direction of the longer side the on the base placed embedding body the generation of small chips, but the glass substrates did not leave. A detailed view of the embedding body for Examine the reason for the generation of the chipping showed that between foamed pearls cracks were formed, and the reason was derived from that the glass substrates due to the drop impact in the embedment body dig. Furthermore also traces of lifted foamed pearls were found, so that revealed that the embedding body in terms of durability in case of repeated use, underlay that of example 1 were. That is, the embedding bodies, since their melting rate the low value of 70% or less showed in terms of mechanical strength, as essential for embedding body was inferior, and presumably there was an excessive deflection while receiving the push by falling down.

Example 2 and Comparative Example 1

(Glass substrates)

• Mother glass for a liquid crystal display Dimensions: 550 mm × 650 mm Thickness: 0.7 mm

(Foam)

Resin material:

• Crosslinked polyethylene with 20 cm ³ / g as expansion ratio and 0.930 g / cm ³ as resin density Average particle size of the resin foam particles: 2.8 mm Melting rate: 98 Elastic compression ratio: 412 N / cm ² Elastic compression exponent: 41.2

(Embedment body)

• Number of glass substrates to be packaged: 12
• External dimensions: Shorter page: 210 mm longer Side: 310 mm length (perpendicular to the shorter and to the longer side): 240 mm Maximum thickness: 23 mm
• Substrateinsetznut: Width: 1.5 mm Depth: 7 mm Increment: 20 mm
• Protrusion shape: Vertical walls of 3.5 mm from the bottom portion of the substrate insertion groove and with a win Cylindrical top with a height of 5.5 mm (shape as seen through the 4 (b) is shown)

(Fastener guide groove)

Two Fastener guide grooves were with a width of 25 mm at the positions formed around 1/4 of the length (240 mm) of the embedding body spaced from the two sides. The grooves were from the Position 50 mm apart from the end portion of the L to the corner portion formed, and in the corner was a circular chamfering of 10 mm radius, with the depth at the junction between the bottom portion of the groove and the chamfering section 3 mm was.

(Vibration test)

The glass substrates were packed as it was in the 2 wherein four of the embedding bodies described above were used to make a wrapped article. In order to evaluate the ability of the potting bodies to fix the glass substrates, the packaged article was subjected to a vibration test. This vibration test was carried out according to JIS Z0232 by mounting the packaged article on a vibration performing table of a vibration tester. As Comparative Example 1, the same test was carried out using the same embedding bodies except that the depth of the fastener guide groove was 1 mm at all positions.

Test conditions:

• Vibration direction: up and down
• Course of the oscillation: sine wave
• Stroke: long stroke (frequency from 5 to 100 Hz)
• Lifting speed: 0.5 octave / min.
• Vibration acceleration: ± 0.75 G
• Oscillation time: 30 minutes

A visual inspection of the state of the glass substrates fixed in the package after completion of the vibration test showed that in example 2 no glass substrates had escaped from the substrate insertion grooves, however, between the glass substrates and the embedding body a low looseness showed. Also regarding the separation of Dust the embedding body the surface the glass substrates showed no dust of any noticeable size.

At the The packaged article of Comparative Example 1 occurred the glass substrates at the longer Side of the two upper embedding bodies 8 minutes after the start of the vibration test from the substrate insertion groove, and they came with the adjacent glass substrates in contact, so that the test because of a risk of damage was stopped.

While the Invention in detail with reference to specific embodiments has been described, the skilled artisan recognizes that various changes and modifications can be made without departing from the spirit and the scope of the same.

These Registration is based on Japanese filed on December 27, 2000 Patent Application No. 396934/2000, and the contents thereof are here incorporated by reference.

INDUSTRIAL APPLICABILITY

As As described above, the embedding bodies of the present invention prevent concentration the binding force of a fastener at the corner sections when tied together with a fastener and accordingly pushes Fixing element itself in the end portion in a favorable manner to the glass substrates, so These do not come out of the grooves, creating a good protective effect is achieved. In particular, by adjusting the dimensions the embedding body and using a foam with special properties as the embedding body forming foam body simplifies the work of packaging and removing the glass substrates, and you can be suitably automated. In addition, the embedding bodies show excellent Dustproofing properties and durability, and they are to adapted to be handled in a clean room, and they are resistant to repeated use. Thus, when packaged according to the invention An article in which a number of glass substrates are packaged These packaged glass substrates are safe against shocks caused by vibrations or Falling down during protected by the transport, and the generation of defective units is noticeably reduced.

Claims (10)

An embedded body for glass substrates of a polyolefin bead foam body and having a substantially L-shaped cross section in conformity with the shape of a corner portion of the glass substrate, on the inside of which a number of substrate insertion grooves are formed along the L, around two sides of the glass substrate forming the corner portion to fix, and wherein on an outer side thereof along the L at least one fastener-guide groove is formed, wherein the thickness of the embedding body relative to the bottom portion of the Befestigungsele ment guide groove is gradually reduced from the two ends of the L to the corner portion. embedment body for glass substrates according to claim 1, wherein the bottom portion of the fastener guide groove Chamfered in the corner section. embedment body for glass substrates of a polyolefin bead foam body and with substantially L-shaped Cross section in accordance with the shape of a corner portion of the glass substrate, wherein at the The inside thereof along a number of substrate insertion grooves L is formed around two, the corner portion forming sides to fix the glass substrate, wherein the thickness of the embedding body of the two ends of the L gradually reduced towards the corner portion. embedment body for glass substrates of a polyolefin bead foam body and with substantially L-shaped Cross section in accordance with the shape of a corner portion of the glass substrate, wherein at the The inside thereof along a number of substrate insertion grooves L is formed around two, the corner portion forming sides to fix the glass substrate, wherein projections on the outside at the two ends of the L are formed. embedment body for glass substrates according to claim 4, wherein an outer corner portion the same is chastised. embedment body for glass substrates according to one of the claims 1 to 5, wherein within the same in a direction perpendicular to the substrate insertion grooves a notched groove is formed. embedment body for glass substrates according to one of the claims 1 to 5, which has a maximum thickness of 10 to 60 mm, a ratio of two sides forming the L from 1.0 to 3.0 with respect to the shorter side and in which the substrate insertion grooves have a width of 1.0- to 4.0 times the thickness of the glass substrate, a depth of 3 to 15 mm and a groove pitch of 6 to 100 mm. embedment body for glass substrates according to one of the claims 1 to 5, wherein the polyolefin bead foam body foamed particles with a mean particle size of 1.5 to 5.0 mm and he has a melt rate of 70 or more, an elastic compression exponent from 3.9 to 490 and a mold recovery rate of 60% or more. Packaged item with: A number of glass substrates; - Embedding bodies for glass substrates according to the claim 1, which thereby keeps the number of glass substrates in a state in parallel with each other at a predetermined interval are arranged so that four corners thereof in the substrate insertion grooves are used; and - one long fastener that binds together along the fastener guide groove the embedding body is wound up. Packaged item with: A number of glass substrates; - Embedding bodies for glass substrates according to claims 3 or 4, which thereby keep the number of glass substrates in a state in which they are arranged in parallel with each other at a predetermined interval are that four corners thereof inserted into the substrate insertion grooves are; and - one long fastener that ties together along the outside of the L of the embedding body is wound up.