Glass chopped strand mat and method for manufacturing the same

Abstract

The present invention provides a method for manufacturing glass chopped strand mats that is less prone to glass strand detachment during operation and offers excellent handling properties. [Solution] A method for manufacturing a glass chopped strand mat 1, which is made by binding multiple glass chopped strands together with a binder 3, comprising the steps of: preparing a glass chopped strand deposition sheet by dispersing and depositing multiple glass chopped strands; applying the binder 3 to the glass chopped strand deposition sheet to obtain a binder-coated glass chopped strand deposition sheet 2; and preparing multiple binder-coated glass chopped strand deposition sheets 2 and bonding the multiple binder-coated glass chopped strand deposition sheets 2 together to obtain a glass chopped strand mat 1.

Description

[Technical Field]

[0001] This invention relates to a glass chopped strand mat and a method for manufacturing the glass chopped strand mat. [Background technology]

[0002] Glass chopped strand mats are reinforcing materials formed by bonding multiple glass chopped strands together to create a mat-like structure. Glass chopped strand mats are known for their lightweight nature and high mechanical strength. Such mats are widely used as reinforcing materials in glass fiber reinforced plastics (GFRP) and automotive molded ceiling materials.

[0003] One known method for manufacturing glass chopped strand mats is as follows: First, a sizing agent is applied to the surface of multiple glass filaments, and the resulting glass strands are cut to a predetermined length to prepare glass chopped strands. Next, a large number of glass chopped strands are piled up uniformly and disorderly in a sheet-like manner to obtain a sheet-like deposit. A binder and water are sprayed onto the obtained sheet-like deposit, and then the binder is heated and melted. After the binder has been heated and melted, the sheet-like deposit is press-molded and cooled and solidified to produce a glass chopped strand mat (for example, Patent Document 1). [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] International Publication No. 2017 / 068872 [Overview of the Initiative] [Problems that the invention aims to solve]

[0005] However, when glass chopped strand mats are manufactured using a manufacturing method like that described in Patent Document 1, glass strands may fall off the chopped strand mat during handling. In particular, glass chopped strand mats with a large basis weight are prone to glass strands falling off during handling, which can make them difficult to handle.

[0006] The object of the present invention is to provide a glass chopped strand mat and a method for manufacturing the glass chopped strand mat that are less prone to glass strand detachment during operation and have excellent handling properties. [Means for solving the problem]

[0007] The following describes various embodiments of a glass chopped strand mat and a method for manufacturing the glass chopped strand mat that solve the above problems.

[0008] A method for manufacturing a glass chopped strand mat according to Embodiment 1 of the present invention is a method for manufacturing a glass chopped strand mat in which a plurality of glass chopped strands are bound together with a binder, and is characterized by comprising the steps of: preparing a glass chopped strand deposition sheet by dispersing and depositing a plurality of glass chopped strands; applying a binder to the glass chopped strand deposition sheet to obtain a binder-coated glass chopped strand deposition sheet; and preparing a plurality of the binder-coated glass chopped strand deposition sheets and bonding the plurality of the binder-coated glass chopped strand deposition sheets together to obtain a glass chopped strand mat.

[0009] In the method for manufacturing a glass chopped strand mat according to Embodiment 2, in Embodiment 1, it is preferable to bond the sides of the glass chopped strand deposition sheet with the binder attached to the sides opposite to the side to which the binder is applied.

[0010] In the method for manufacturing a glass chopped strand mat according to Embodiment 3, it is preferable in Embodiment 1 or Embodiment 2 to press-form a plurality of the binder-coated glass chopped strand deposition sheets and then bond the plurality of press-formed binder-coated glass chopped strand deposition sheets together.

[0011] In the method for manufacturing a glass chopped strand mat according to Embodiment 4, it is preferable to bond a plurality of the binder-coated glass chopped strand deposition sheets together by heat and pressure in Embodiment 1 or Embodiment 2.

[0012] In the method for manufacturing a glass chopped strand mat according to Embodiment 5, in any one embodiment from Embodiments 1 to 4, the basis weight of the glass chopped strand deposition sheet is 50 g / m². 2 More than 150g / m 2 The following is preferable:

[0013] In the method for manufacturing a glass chopped strand mat according to Embodiment 6, in any one embodiment from Embodiments 1 to 5, it is preferable that the binder includes a powdered hot-melt resin adhesive.

[0014] In the method for producing a glass chopped strand mat according to Embodiment 7, in any one embodiment from Embodiment 1 to Embodiment 6, it is preferable to apply the binder so that the concentration of the binder contained in the binder-coated glass chopped strand deposition sheet is 5% by mass or more and 15% by mass or less.

[0015] In the method for manufacturing a glass chopped strand mat according to Embodiment 8, it is preferable to bond multiple sheets of the binder-coated glass chopped strand with a functional material sandwiched between them, in any one embodiment from Embodiments 1 to 7.

[0016] In the method for manufacturing a glass chopped strand mat according to Aspect 9, in Aspect 8, it is preferable that the functional material is a sound-absorbing material or a heat-insulating material.

[0017] In the method for manufacturing a glass chopped strand mat according to Aspect 10, in any one of Aspects 1 to 9, while conveying a plurality of the glass chopped strand deposited sheets with binder, it is preferable to laminate and wind up a plurality of the glass chopped strand deposited sheets with binder to produce a wound body of the glass chopped strand mat.

[0018] In the method for manufacturing a glass chopped strand mat according to Aspect 11, in any one of Aspects 1 to 10, the basis weight of the glass chopped strand mat is preferably 150 g / m 2 or more and 800 g / m 2 or less.

[0019] The glass chopped strand mat according to Aspect 12 of the present invention is characterized in that it is a laminate of a plurality of glass chopped strand deposited sheets with binder. <000​​​​​​​​​​​​​​​​​​​Figures 3(a) and (b) are schematic cross-sectional views illustrating the bonding process in a method for manufacturing a glass chopped strand mat according to one embodiment of the present invention. [Figure 4] Figures 4(a) and (b) are schematic cross-sectional views illustrating the bonding process in a method for manufacturing a glass chopped strand mat according to another embodiment of the present invention. [Figure 5] Figure 5 is a schematic cross-sectional view illustrating a comparative example of a glass chopped strand mat. [Modes for carrying out the invention]

[0022] Preferred embodiments of the present invention will be described below. However, the following embodiments are merely illustrative, and the present invention is not limited to these embodiments. In addition, in each drawing, components having substantially the same function may be referred to by the same reference numerals.

[0023] [Method for manufacturing glass chopped strand mat] The present invention provides a method for producing a glass chopped strand mat, which is made by binding multiple glass chopped strands together with a binder.

[0024] The present invention provides a method for manufacturing a glass chopped strand mat, comprising the steps of: preparing a glass chopped strand deposition sheet by dispersing and depositing a plurality of glass chopped strands (deposition sheet preparation step); applying a binder to the glass chopped strand deposition sheet to obtain a binder-coated glass chopped strand deposition sheet (binder application step); and preparing a plurality of binder-coated glass chopped strand deposition sheets and bonding the plurality of binder-coated glass chopped strand deposition sheets together to obtain a glass chopped strand mat (bonding step).

[0025] The present invention provides a method for manufacturing glass chopped strand mats that, because it has the above configuration, makes it possible to manufacture glass chopped strand mats that are less prone to glass strand detachment during operation and offer excellent handling properties.

[0026] Traditionally, with glass chopped strand mats, glass strands sometimes fell off during handling. In particular, with glass chopped strand mats with a large base weight, glass strands were prone to falling off during handling, making it difficult to improve handling.

[0027] This can be explained using Figure 5, for example. The glass chopped strand mat 101 shown in Figure 5 is a mat with a high basis weight. A glass chopped strand mat 101 with a high basis weight can be obtained by increasing the thickness or increasing the strand density of the glass chopped strands.

[0028] Conventionally, when manufacturing a glass chopped strand mat 101 as described above, a binder 103 is applied from one main surface 101a of the glass chopped strand mat 101 to fix the glass strands constituting the glass chopped strand mat 101 together. However, with glass chopped strand mats 101 with a large basis weight, the binder 103 applied from one main surface 101a of the glass chopped strand mat 101 does not easily penetrate to the other main surface 101b of the glass chopped strand mat 101, and the fixing of the strands on the other main surface 101b of the glass chopped strand mat 101 may be insufficient. As a result, with glass chopped strand mats 101 with a large basis weight, glass strands 104 may fall off from the other main surface 101b of the glass chopped strand mat 101 during the manufacturing process.

[0029] In contrast, the present invention's method for manufacturing glass chopped strand mats involves laminating multiple sheets of glass chopped strand deposition with a binder to produce the glass chopped strand mat. Therefore, according to the present invention's method for manufacturing glass chopped strand mats, a glass chopped strand mat 1 can be obtained, which is a laminate of multiple sheets of glass chopped strand deposition with a binder 2, as shown in Figure 1. Note that the binder is not shown in Figure 1. Furthermore, although the glass chopped strand mat 1 shown in Figure 1 consists of two sheets of glass chopped strand deposition with a binder 2, in the present invention, the glass chopped strand mat 1 may be a laminate of three or more sheets of glass chopped strand deposition with a binder 2.

[0030] In the manufacturing method of the glass chopped strand mat 1, for example, multiple sheets of glass chopped strand laminated sheet 2 with a binder applied to a glass chopped strand laminated sheet with a small basis weight can be prepared, and by laminating these sheets, a glass chopped strand mat 1 with a large basis weight can be obtained. In this case, the binder can be sufficiently penetrated from one main surface 2a to the other main surface 2b in each glass chopped strand laminated sheet 2 with the binder, and the glass strands can be fixed to each other throughout the glass chopped strand mat 1. Therefore, the glass chopped strand mat 1 manufactured in this way can have a large basis weight, and is less prone to glass strand detachment during work, and is easy to handle.

[0031] The following describes in detail each step in the method for manufacturing the glass chopped strand mat of the present invention.

[0032] (Preparation process for the deposition sheet and application process for the binder) In the method for producing a glass chopped strand mat according to the present invention, first, a glass chopped strand deposition sheet is prepared by dispersing and depositing multiple glass chopped strands (deposition sheet preparation step). Next, a binder is applied to the glass chopped strand deposition sheet to obtain a glass chopped strand deposition sheet with a binder (binder application step).

[0033] Before carrying out the deposition sheet preparation process and the binder application process, a cake of glass strands is prepared in advance.

[0034] Specifically, the glass raw material is placed in a glass melting furnace and melted to form molten glass. After the molten glass is made homogenized, it is drawn out through a heat-resistant nozzle attached to a bushing. The drawn-out molten glass is then cooled to form a glass filament.

[0035] A sizing agent is applied to the surface of the glass filament, and with the sizing agent evenly applied, hundreds to thousands of glass filaments are aligned and bundled together to form a glass strand. The resulting glass strand, while aligned, is wound onto a manufacturing paper tube to create a winding. Subsequently, the wounding is dried to form a sizing agent coating on the surface of the glass strand, obtaining a cake.

[0036] The sizing agent for bundling glass filaments is not particularly limited, and for example, polyvinyl acetate emulsion can be used. The sizing agent may further contain, for example, a silane coupling agent. Specifically, aminosilane, epoxysilane, vinylsilane, acrylicsilane, chlorsilane, mercaptosilane, ureidosilane, etc. can be used as silane coupling agents. Furthermore, the sizing agent may also contain components other than the silane coupling agent, such as lubricants, nonionic surfactants, and antistatic agents, and the mixing ratio of each component can be determined as needed.

[0037] Next, the apparatus 20 shown in Figure 2 is used to perform the deposition sheet preparation process and the binder application process. Specifically, the roving 10 is unraveled from the inner layer of the glass strand cake obtained as described above and fed into a plurality of cutting machines 12 attached to the ceiling of the chamber 11. This cuts the glass strands constituting the roving 10 to a predetermined length, thereby obtaining glass chopped strands 10A. Each cutting machine 12 consists of a cutter roller 12a and a rubber roller 12b. In each cutting machine 12, the roving 10 is fed between the cutter roller 12a and the rubber roller 12b, which rotate relative to each other, thereby cutting the glass strands.

[0038] Next, the glass chopped strands 10A are uniformly dispersed on the first conveyor belt 13 located at the bottom of the chamber 11 and piled up in a sheet. This yields a glass chopped strand pile sheet. The glass chopped strand pile sheet is then transported out of the chamber 11 and onto the second conveyor belt 14.

[0039] Next, the binder is uniformly spread onto the glass chopped strand stack sheet moving on the second conveyor belt 14 by the spreader 15, and then transported to the next third conveyor belt 16. The glass chopped strand stack sheet coated with the binder is moved into the heating furnace 17 and heated to soften and melt the binder. Water may also be sprayed along with the binder. If the binder is in powder or other solid form, spraying water can make it easier for the binder to adhere to the surface of the glass chopped strand 10A.

[0040] Next, the glass chopped strand laminated sheet is moved to the outside of the heating furnace 17 and cooled and pressed by passing it through the water-cooled rolls 18 of the cooling mill. This solidifies the molten binder, and a binder-coated glass chopped strand laminated sheet 2 is obtained. The binder-coated glass chopped strand laminated sheet 2 can be wound into a winding body using a winding machine 19 and then used by unwinding it from the winding body.

[0041] The binder used to bond the glass chopped strands 10A is not particularly limited, and resins such as polyester, polypropylene, vinyl acetate, acrylic, and epoxy can be used. Among these, polyester resin is preferred as the binder, and powdered unsaturated polyester resin is more preferred. In this case, the melting and cooling solidification of the binder can be made even easier.

[0042] The form of the binder is not particularly limited, and for example, powder, liquid, fibrous, sheet, or film forms can be used. In particular, the binder preferably contains a powdered hot melt resin adhesive, and more preferably a powdered hot melt resin adhesive. When the binder is in the form of a powder, such as a powdered hot melt resin adhesive, the binder is less likely to penetrate into the glass chopped strand deposition sheet. According to the manufacturing method of the present invention, even when such a powdered binder is used, the glass strands are less likely to fall off by bonding together multiple sheets of glass chopped strand deposition 2 with the binder.

[0043] Furthermore, it is preferable to apply the binder so that the concentration of the binder in the binder-coated glass chopped strand laminated sheet 2 is between 5% by mass and 15% by mass. If the binder concentration is above the lower limit, the binder-coated glass chopped strand laminated sheets 2 can be bonded together more securely in the bonding process described later. Also, if the binder concentration is below the upper limit, the handling of the glass chopped strand mat 1 during manufacturing and operation can be further improved.

[0044] (Bonding process) Next, by bonding multiple sheets of bonded glass chopped strand deposition sheets 2 together, a glass chopped strand mat 1 as shown in Figure 1 can be obtained. Preferably, the glass chopped strand mat 1 is obtained by laminating multiple sheets of bonded glass chopped strand deposition sheets 2 and bonding them together by heat compression. However, in the present invention, the glass chopped strand mat 1 may also be obtained by press-molding multiple sheets of bonded glass chopped strand deposition sheets 2 and bonding the press-molded sheets of bonded glass chopped strand deposition sheets 2 together. The heat compression temperature can be, for example, 130°C or higher and 180°C or lower.

[0045] In manufacturing the glass chopped strand mat 1, multiple sheets of glass chopped strand laminated with a binder 2, drawn from multiple windings, may be transported separately, and multiple sheets of glass chopped strand laminated with a binder 2 may be bonded together and wound up to produce a winding (roll) of the glass chopped strand mat 1.

[0046] Alternatively, when manufacturing the glass chopped strand mat 1, multiple sheets of bonded glass chopped strand laminated sheet 2 may be cut into a specific shape, laminated, and bonded together to produce the glass chopped strand mat 1 (cut product).

[0047] The following describes a specific example of the bonding process using Figure 3. Figures 3(a) and (b) illustrate an example of a method for bonding two bonded glass chopped strand deposition sheets 2.

[0048] First, as shown in Fig. 3(a), prepare two glass chopped strand deposition sheets 2 with a binder. One main surface 2a of the glass chopped strand deposition sheet 2 with a binder is the surface coated with the binder 3. The other main surface 2b of the glass chopped strand deposition sheet 2 with a binder is the surface on the opposite side of the surface coated with the binder 3. The smaller the basis weight of the glass chopped strand deposition sheet constituting the glass chopped strand deposition sheet 2 with a binder, the easier it is for the binder 3 applied from the one main surface 2a side to penetrate to the other main surface 2b side.

[0049] The basis weight of the glass chopped strand deposition sheet constituting the glass chopped strand deposition sheet 2 with a binder is preferably 50 g / m 2 or more, more preferably 70 g / m 2 or more, still more preferably 80 g / m 2 or more, and preferably 180 g / m 2 or less, more preferably 150 g / m 2 or less, still more preferably 140 g / m 2 or less. When the basis weight of the glass chopped strand deposition sheet is not less than the above lower limit value, the handling property during the production and work of the glass chopped strand mat 1 can be further improved. Also, when the basis weight of the glass chopped strand deposition sheet is not more than the above upper limit value, it is possible to easily penetrate the binder 3 applied from the one main surface 2a side of the glass chopped strand deposition sheet 2 with a binder to the other main surface 2b side.

[0050] Next, in the two glass chopped strand deposition sheets 2 with a binder, bond the other main surfaces 2b, which are the surfaces on the opposite side of the side coated with the binder 3. Thereby, the glass chopped strand mat 1 shown in Fig. 3(b) can be obtained.

[0051] As in this embodiment, when bonding two bonded glass chopped strand deposition sheets 2, it is preferable to bond the sides opposite to the side to which the bonder 3 is applied (the other main surface 2b). In this case, as shown in Figure 3(b), the side to which the bonder 3 is applied (the other main surface 2a) is positioned on the outer surface, which makes it even less likely for glass strands to fall off during the operation of the glass chopped strand mat 1.

[0052] Furthermore, from a similar viewpoint, when bonding three or more bonded glass chopped strand deposition sheets 2, it is preferable to bond the bonded glass chopped strand deposition sheets 2 such that the side with the bonded agent 3 applied to its outer surface is positioned.

[0053] In the manufacturing method for glass chopped strand mat 1, even if foreign matter is mixed into the binder-coated glass chopped strand deposition sheet 2 during manufacturing, the defective portion can be removed, and the binder-coated glass chopped strand deposition sheet 2 can be bonded and laminated to obtain the glass chopped strand mat 1. Therefore, the manufacturing method for glass chopped strand mat 1 can reduce the number of defective mats and use materials efficiently. Consequently, the manufacturing method for glass chopped strand mat 1 can further increase the productivity of glass chopped strand mat 1.

[0054] (Glass Chopped Strand Mat) As shown in Figure 3(b), the glass chopped strand mat 1 of this embodiment is a laminate of multiple glass chopped strand deposition sheets 2 with a binder.

[0055] The number of layers of the binder-coated glass chopped strand laminated sheet 2 is not particularly limited, but is preferably two or more layers, more preferably three or more layers, preferably six or fewer layers, and more preferably four or fewer layers. When the number of layers of the binder-coated glass chopped strand laminated sheet 2 is equal to or greater than the lower limit, the basis weight of each binder-coated glass chopped strand laminated sheet 2 can be designed to be even smaller. Also, when the number of layers of the binder-coated glass chopped strand laminated sheet 2 is equal to or less than the upper limit, the productivity of the glass chopped strand mat 1 can be further improved.

[0056] The thickness of the binder-coated glass chopped strand deposition sheet 2 is preferably 0.20 mm or more, more preferably 0.30 mm or more, preferably 0.60 mm or less, and more preferably 0.40 mm or less. When the thickness of the binder-coated glass chopped strand deposition sheet 2 is equal to or greater than the lower limit, the handling of the glass chopped strand mat 1 during manufacturing and operation can be further improved. Also, when the thickness of the binder-coated glass chopped strand deposition sheet 2 is equal to or less than the upper limit, the binder-coated glass chopped strand deposition sheets 2 can be bonded to each other more reliably.

[0057] The glass chopped strand mat 1 of this embodiment is a laminate of multiple glass chopped strand deposition sheets 2 with a binder. For example, by preparing multiple glass chopped strand deposition sheets 2 with a binder applied to glass chopped strand deposition sheets with a small basis weight, and laminating them, a glass chopped strand mat 1 with a large basis weight can be made. In this case, the binder 3 can be sufficiently penetrated from one main surface 2a to the other main surface 2b in each glass chopped strand deposition sheet 2 with the binder, and the glass strands can be fixed to each other throughout the glass chopped strand mat 1. Therefore, even when the basis weight is increased, the glass chopped strand mat 1 is less likely to detach glass strands during work and has excellent handling properties.

[0058] The basis weight of glass chopped strand mat 1 is preferably 150 g / m². 2 Above, 200g / m² is more comfortable. 2 More preferably 250 g / m² 2 The above is preferable, preferably 800 g / m² 2 More preferably 600g / m² 2 More preferably 500 g / m 2 The following applies: When the basis weight of the glass chopped strand mat 1 is above the lower limit value, the handling of the glass chopped strand mat 1 during manufacturing and operation can be further improved. Furthermore, when the basis weight of the glass chopped strand mat 1 is within the above range, in applications such as FRP (fiber-reinforced plastic), when applying and blending resin to the glass chopped strand mat 1, it is possible to suppress the reduction in workability due to peeling of the glass chopped strand mat 1 and the unevenness of the glass content.

[0059] Furthermore, in the glass chopped strand mat 1 of this embodiment, it is preferable that a surface coated with the binder 3 (one main surface 2a) is provided on the outer surface, as shown in Figure 3(b). In this case, it is possible to further reduce the likelihood of glass strands falling off during the operation of the glass chopped strand mat 1, and to further improve the handling of the glass chopped strand mat 1.

[0060] (Other embodiments) Figures 4(a) and (b) are schematic cross-sectional views illustrating the bonding process in a method for manufacturing a glass chopped strand mat according to another embodiment of the present invention.

[0061] As shown in Figure 4(a), a functional material 25 may be placed between two binder-coated glass chopped strand deposition sheets 2, and the two binder-coated glass chopped strand deposition sheets 2 may be bonded together. This may result in a glass chopped strand mat 21 having the functional material 25 placed between two binder-coated glass chopped strand deposition sheets 2, as shown in Figure 4(b).

[0062] The functional material 25 is preferably in sheet form. Examples of the functional material 25 include sound-absorbing materials and heat-insulating materials. The functional material is preferably a nonwoven fabric or foam made of thermoplastic resin or the like.

[0063] The thickness of the functional material 25 (functional sheet) is preferably 0.10 mm or more, more preferably 0.20 mm or more, preferably 1.50 mm or less, and more preferably 1.00 mm or less. When the thickness of the functional material 25 (functional sheet) is above the lower limit, the functionality of the functional material 25 is more easily exhibited. Furthermore, when the thickness of the functional material 25 (functional sheet) is below the upper limit, the handling of the glass chopped strand mat 21 during manufacturing and operation can be further improved.

[0064] A functional material 25 may be provided between two bonded glass chopped strand laminated sheets 2, as in the glass chopped strand mat 21. In the glass chopped strand mat 21 as well, since multiple bonded glass chopped strand laminated sheets 2 are laminated at least indirectly, glass strands are less likely to fall off during work, and handling is excellent.

[0065] Furthermore, in the glass chopped strand mat 21, it is preferable that a surface coated with the binder 3 (one main surface 2a) is provided on the outer surface, as shown in Figure 4(b). In this case, it is possible to further reduce the likelihood of glass strands falling off during the operation of the glass chopped strand mat 21, and to further improve the handling of the glass chopped strand mat 21. [Explanation of Symbols]

[0066] 1.21... Glass Chopped Strand Mat 2a…One main surface 2b...Other main surface 2…Binding agent-coated glass chopped strand deposition sheet 3…Binding agent 10...Roving 10A... Glass Chopped Strand 11… Chamber 12...Cutting machine 12a...Cutter roller 12b... Rubber roller 13…First conveyor belt 14…Second conveyor belt 15...Spreader 16…Third conveyor 17...Heating furnace 18...Water-cooled rolls for cooled rolling mills 19... Winding machine 20...device 25…Functional materials

Claims

1. A method for manufacturing a glass chopped strand mat, in which multiple glass chopped strands are bound together with a binder, The process involves preparing a glass chopped strand deposition sheet by dispersing and depositing multiple glass chopped strands, The process involves applying a binder to the aforementioned glass chopped strand deposition sheet to obtain a glass chopped strand deposition sheet with a binder, The process involves preparing multiple sheets of glass chopped strand deposition with a binder, and bonding multiple sheets of glass chopped strand deposition with a binder to obtain a glass chopped strand mat. A method for manufacturing glass chopped strand mats, comprising the features described above.

2. A method for manufacturing a glass chopped strand mat according to claim 1, comprising bonding together the sides of the glass chopped strand deposition sheets with the binder attached, opposite to the side to which the binder is applied.

3. A method for manufacturing a glass chopped strand mat according to claim 1 or 2, comprising press-molding a plurality of the aforementioned glass chopped strand deposition sheets with a binder, and bonding the plurality of press-molded glass chopped strand deposition sheets with a binder together.

4. A method for producing a glass chopped strand mat according to claim 1 or 2, comprising bonding together a plurality of the aforementioned binder-coated glass chopped strand deposition sheets by heat and pressure bonding.

5. The basis weight of the aforementioned glass chopped strand deposition sheet is 50 g / m². ２ Above, 150g / m ２ The method for producing a glass chopped strand mat according to claim 1 or 2, which is as follows:

6. A method for producing a glass chopped strand mat according to claim 1 or 2, wherein the binder comprises a powdered hot-melt resin adhesive.

7. A method for producing a glass chopped strand mat according to claim 1 or 2, wherein the binder is applied to the glass chopped strand mat containing the binder so that the concentration of the binder in the binder-containing glass chopped strand mat is 5% by mass or more and 15% by mass or less.

8. A method for manufacturing a glass chopped strand mat according to claim 1 or 2, wherein a functional material is sandwiched between multiple sheets of glass chopped strand laminated with a binder, and the multiple sheets of glass chopped strand laminated with a binder are bonded together.

9. The method for manufacturing a glass chopped strand mat according to claim 8, wherein the functional material is a sound-absorbing material or a heat-insulating material.

10. A method for producing a glass chopped strand mat according to claim 1 or 2, comprising conveying a plurality of the bonded glass chopped strand deposition sheets, bonding the plurality of bonded glass chopped strand deposition sheets together, and winding them up to produce a wound body of the glass chopped strand mat.

11. The basis weight of the aforementioned glass chopped strand mat is 150 g / m². ２ Above, 800g / m ２ The method for producing a glass chopped strand mat according to claim 1 or 2, which is as follows:

12. A glass chopped strand mat is a laminate of multiple sheets of glass chopped strands with a binder.

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