JP2019156510A - Method of forming wound body of glass chopped strand mat and wound body of glass chopped strand mat - Google Patents

Abstract

To provide a method of forming a wound body of a glass chopped strand mat such that the glass chopped strand map can be easily and securely wound and also prevented from breaking, and the wound body of the glass chopped strand mat.SOLUTION: There is provided a method of forming a wound body R of a glass chopped strand mat M, and the method comprises a process of bringing at least a part of a front end part M1 of the glass chopped strand mat into contact along an outer peripheral surface of a winding core 72 and rotating the winding core 72 so as to wind the glass chopped strand mat M in a roll shape and thus forming the wound body R, the outer peripheral surface of the winding core 72 being a pressure-sensitive surface A of 0.3 to 2.0 N/10 mm in adhesive strength measured according to JIS K 0237 (2009).SELECTED DRAWING: Figure 2

Description

  The present invention relates to a method for forming a wound body of a glass chopped strand mat and a wound body of a glass chopped strand mat.

Conventionally, a glass chopped strand mat formed by forming a cut glass fiber (hereinafter referred to as a glass chopped strand) into a mat shape is known.
The glass chopped strand mat is usually a glass chopped strand which is cut into a strip shape by a slitter device and then wound around a core made of paper as a structural material, and is a roll-shaped final product having the core as an axis. It becomes a roll of mat.

  In the process of using such a glass chopped strand mat as a wound body of the glass chopped strand mat, a member for joining the core and the glass chopped strand mat is not used in order to wind the glass chopped strand mat around the core. In addition, there is known a method of winding the glass chopped strand mat so as to wind the tip of the glass chopped strand mat directly (for example, see Patent Document 1).

  However, in the method as described in Patent Document 1, it is difficult to reliably wind the glass chopped strand mat around the core, and the core is idly rotated at the initial stage of winding so that the glass chopped strand mat is interposed between the glass chopped strand mat and the core. There arises a problem in that the glass chopped strand mat is wound in a state where the glass chopped strand mat protrudes from the core or the glass chopped strand mat is broken. These were major technical issues in terms of quality and production efficiency.

  For such a problem, in a method of winding a belt-shaped material around a core, a method has been proposed in which the surface of the core is made uneven so that the static friction coefficient between the core and the belt-shaped material is a predetermined value or more (for example, , See Patent Document 2). According to this method, it is possible to wind the belt-like material around the winding core to some extent.

JP 2009-154996 A Japanese Patent Laid-Open No. 9-50096

  However, the method disclosed in Patent Document 2 has not yet solved problems such as reliable winding property, damage to the surface of the belt-shaped material, winding shape, and winding deviation. In addition, the band-shaped material can be securely wound by firmly adhering the band-shaped material to all the cores, but when the band-shaped material is pulled out due to the strong adhesion, damage such as tearing the adhesive part of the band-shaped material without leaving the core Is a problem.

  The present invention has been made in view of such current problems, and it is possible to easily and surely wind the glass chopped strand mat around the winding core and prevent damage such as tearing of the glass chopped strand mat. It is an object of the present invention to provide a method for forming a roll of glass chopped strand mat and a roll of glass chopped strand mat.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  A method for forming a wound body of a glass chopped strand mat according to the present invention is a method for forming a wound body of a strip-shaped glass chopped strand mat including a glass chopped strand, and is at least one of the tip portions of the glass chopped strand mat. A step of winding the glass chopped strand mat into a roll to form a wound body by contacting the part along the outer peripheral surface of the core and rotating the core, and the outer peripheral surface of the core is It has the adhesive surface whose adhesive force measured based on JISK0237 (2009) is 0.3-2.0N / 10mm, It is characterized by the above-mentioned.

  According to such a configuration, by providing an adhesive surface that adheres with a predetermined adhesive force on the outer peripheral surface of the core, the tip portion or the vicinity of the tip portion of the glass chopped strand mat is adhered to the adhesive surface of the core, and glass The chopped strand mat can be reliably wound, and a wound body with a good winding shape can be produced efficiently. In addition, when the glass chopped strand mat is pulled out from the wound body of the glass chopped strand mat and used up, the glass chopped strand mat can be easily separated from the winding core even if the pulled glass chopped strand mat is pulled. Since the adhesive strength is set, the occurrence of damage such as tearing can be prevented.

  Further, in the method for forming a wound body of a glass chopped strand mat according to the present invention, the outer peripheral surface of the core is JIS K 7125 (1999) between the glass chopped strand mat and the portion excluding the adhesive surface. It is preferable to have a non-adhesive surface with a dynamic friction coefficient specified in year) of 0.15 to 0.35.

  That is, when the coefficient of dynamic friction is 0.15 to 0.35, the tip portion of the glass chopped strand mat can be brought into contact with the outer peripheral surface of the core and stably wound. Therefore, it can suppress that wrinkles generate | occur | produce in a glass chopped strand mat.

  Further, in the method for forming a wound body of the glass chopped strand mat according to the present invention, the pressure-sensitive adhesive surface is attached to the outer peripheral surface of the core through one pressure-sensitive adhesive surface of the double-sided tape. It is preferable to be constituted by the other adhesive surface.

  Thereby, an adhesive surface can be easily formed in an arbitrary region of the outer peripheral surface of the core.

  In the method for forming a wound body of the glass chopped strand mat according to the present invention, the pressure-sensitive adhesive surface is preferably composed of a synthetic resin adhesive.

  Thereby, an adhesive surface can be easily formed in an arbitrary region of the outer peripheral surface of the core.

  Further, in the method for forming a wound body of a glass chopped strand mat according to the present invention, in the double-sided tape, the adhesive force measured in accordance with JIS K 0237 (2009) of the one adhesive surface is It is preferable that the adhesive strength of the other adhesive surface is larger than the adhesive force measured according to JIS K 0237 (2009).

  Thereby, when pulling out and using up a glass chopped strand mat, it can suppress that a double-sided tape peels from a core side. As a result, it is possible to prevent the double-sided tape from sticking to the glass chopped strand mat side and being pulled out.

Further, the method of forming the windings of the glass chopped strand mat according to the present invention, the basis weight of the glass chopped strand mat is preferably ^{70g / m 2 ~150g / m 2} .

Thereby, a glass chopped strand mat can be stably wound up on a core. Specifically, when the basis weight is less than 70 g / m ² , the friction coefficient of the surface of the glass chopped strand mat is reduced, the rigidity of the glass chopped strand mat is lowered, and wrinkles are easily generated. It is difficult to wind up stably.

  Moreover, as for the formation method of the winding body of the glass chopped strand mat which concerns on this invention, it is preferable that the winding speed | velocity at the time of winding-up of the said glass chopped strand mat is 40m / min-100m / min.

  Thereby, a glass chopped strand mat can be stably wound up on a core. Specifically, when the winding speed of the glass chopped strand mat is less than 40 m / min, the production efficiency is not improved in mass production, which is not economical. On the other hand, when the winding speed exceeds 100 m / min, even if the glass chopped strand mat comes into contact with the outer peripheral surface of the core, the winding may not follow the rotation of the core.

  Further, the wound body of the glass chopped strand mat according to the present invention is a wound body of a glass chopped strand mat having a winding core and a roll-shaped glass chopped strand wound around the winding core, It has the adhesive surface whose adhesive force measured based on JISK0237 (2009) is 0.3-2.0N / 10mm in the outer peripheral surface of a core.

  According to such a configuration, when the glass chopped strand mat is pulled out from the winding body of the glass chopped strand mat and used up, the glass chopped strand mat is easily pulled from the core even if the pulled glass chopped strand mat is pulled. Since the adhesive force of the adhesive surface is set so as to be separated, the occurrence of damage such as tearing can be prevented.

  Further, in the wound body of the glass chopped strand mat according to the present invention, the outer peripheral surface of the core is JIS K 7125 (1999) between the glass chopped strand mat and the portion other than the adhesive surface. It is preferable to have a non-adhesive surface with a specified dynamic friction coefficient of 0.15 to 0.35.

  That is, when the dynamic friction coefficient is 0.15 to 0.35, wrinkles of the glass chopped strand mat are reduced.

  As effects of the present invention, the following effects can be obtained.

  According to the method for forming a wound body of a glass chopped strand mat according to the present invention, the tip of the glass chopped strand mat or the vicinity of the tip is provided by providing an adhesive surface that adheres to the outer peripheral surface of the core with a predetermined adhesive force. Can be bonded to the adhesive surface of the core, and the glass chopped strand mat can be reliably wound, and a wound body with a good winding shape can be produced efficiently. In addition, when the glass chopped strand mat is pulled out from the wound body of the glass chopped strand mat and used up, the glass chopped strand mat can be easily separated from the winding core even if the pulled glass chopped strand mat is pulled. Since the adhesive strength is set, the occurrence of damage such as tearing can be prevented.

  Further, according to the wound body of the glass chopped strand mat according to the present invention, when the glass chopped strand mat is pulled out and used up, the glass chopped strand mat is easily pulled from the core even if the pulled glass chopped strand mat is pulled. Since the adhesive force of the adhesive surface is set so as to be separated from each other, damage such as tearing can be prevented.

The schematic diagram which shows the whole structure of the manufacturing apparatus which manufactures the winding body of the glass chopped strand mat which concerns on one Embodiment of this invention. The perspective view which shows the winding core which affixed the double-sided tape on the outer peripheral surface, and formed the adhesive surface. It is operation | movement explanatory drawing of the manufacturing apparatus of the glass chopped strand mat which concerns on one Embodiment of this invention, Comprising: (a) is a figure which shows the winding initial stage, (b) is a glass chopped strand mat wound along a guide member. The figure which shows the state which is going, (c) is a figure which shows the state which the glass chopped strand mat made the round of a winding core, (d) is from a winding cylinder rather than the outer peripheral position of the winding body at the time of a guidance member full winding. The figure which shows the state after retracting | saving in the direction where the distance of this becomes large, (e) is a figure which shows the wound body at the time of full winding of a glass chopped strand mat.

Next, embodiments of the invention will be described.
In the present invention, when a strip-shaped glass chopped strand mat slit-cut by a slitter device is wound around a core, the tip of the glass chopped strand mat is brought into contact with the outer peripheral surface of the core and a predetermined adhesive provided on the outer peripheral surface. This is a method of forming a wound body of a glass chopped strand mat by adhering with a pressure-sensitive adhesive surface and winding it into a roll.

[Overall Configuration of Manufacturing Apparatus 1]
First, the whole structure of the manufacturing apparatus 1 of the winding body R of the glass chopped strand mat M provided with the winding device 70 which embodies the method of forming the winding body of the glass chopped strand mat according to one embodiment of the present invention. Will be described with reference to FIG.
The production apparatus 1 is an apparatus for producing a glass chopped strand mat M from the glass cake C, and using the produced glass chopped strand mat M as a wound body R of the glass chopped strand mat M. A conveyor 20, a binder applying device 30, a heating furnace 40, a cold pressure roll 50, a winding device 70, and the like are provided.

  The cutting machine 10 is an apparatus for generating chopped strands S from glass fibers F wound around a glass cake C, and includes a cutter roller 11 and a rubber roller 12 that are arranged to face each other.

  And the cutting machine 10 is equipped with the rotating cutter roller 11 and the rubber roller 12, and supplies the glass fiber F pulled out from the glass cake C between the cutter roller 11 and the rubber roller 12, so that the glass fiber F is continuous. The glass chopped strands S can be continuously produced by cutting.

The glass fiber F is cut into glass chopped strands S having a length of 10 mm or more and 100 mm or less by a cutting machine 10. When the length of the glass chopped strand S is less than 10 mm, a large amount of binder is required to produce the glass chopped strand mat, and as a result, the glass chopped strand S is easily slipped against the outer peripheral surface of the core. It becomes difficult to stably wind the glass chopped strand mat M around the core. If the length of the glass chopped strand S exceeds 100 mm, the surface of the glass chopped strand mat M becomes rough, resulting in an increase in the coefficient of dynamic friction, which makes winding difficult.
From the above viewpoint, the length of the glass chopped strand S is preferably in the range of 20 mm to 70 mm, more preferably in the range of 30 mm to 60 mm, and still more preferably in the range of 45 mm to 55 mm.

The conveyor 20 is a device for horizontally conveying the glass chopped strands S · S generated by the cutting machine 10, and includes a first conveyor 21, a second conveyor 22, and a third conveyor 23. Has been.
Moreover, the conveyance conveyor 20 is the order of the 1st conveyor 21, the 2nd conveyor 22, and the 3rd conveyor 23 from an upstream in the conveyance direction (direction of the arrow A shown in FIG. 1) of glass chopped strand SS. Are arranged continuously.

  Each of the conveyors 21, 22, and 23 includes a driving roller and a driven roller, and a conveyance belt B configured by a mesh-like endless belt having an opening diameter smaller than the length of the glass chopped strand S is provided on each roller. It is wound and constitutes a conveyor device.

  Each of the conveyors 21, 22, and 23 is configured such that a driving roller is driven by a motor, and the conveyor belt B is rotationally driven along each roller.

The first conveyor 21 includes a first conveyor belt B <b> 1 and is installed below the cutting machine 10.
Moreover, the chamber 13 is arrange | positioned on the 1st conveyor 21, The glass chopped strand S cut | disconnected by the cutting machine 10 passes through the inside of the chamber 13, and falls on 1st conveyance belt B1.

  A suction device (not shown) including a suction duct and a blower is disposed below the first transport belt B1, and transports while sucking the chopped strands S deposited and distributed on the first transport belt B1. It is configured to be able to.

  The second conveyor 22 includes a mesh-like second conveyance belt B2 for conveying the chopped strand S.

Here, a binder application device 30 is disposed above the second conveyor 22.
The binder application device 30 scatters the binder P, which is a resin powder, toward the glass chopped strands S, S,... On the second conveyor belt B2 of the second conveyor 22, and the glass chopped strand S. A device for attaching the binder P to S.

As the kind of the binder P, a thermoplastic resin powder is suitable, and for example, a powder polyester resin (for example, New Track (registered trademark) 514, manufactured by Kao Corporation) can be used.
In addition, examples of usable thermoplastic resin powder include resin powders such as nylon, polyethylene, polystyrene, polypropylene, and polyvinyl chloride.

  And the glass chopped strand S on the 2nd conveyor 22 is conveyed to the downstream 3rd conveyor 23 in the state to which the binder P adhered uniformly.

A water sprayer (not shown) may be provided on the upstream side of the binder application device 30.
If the glass chopped strands S are preliminarily wetted with water, the binder P tends to adhere to the surface of the glass chopped strands S due to the action of the surface tension of water. Increase more. As a result, the amount of the binder used can be reduced, the surface of the glass chopped strand mat can be prevented from being slippery, and winding is facilitated.

Moreover, the heating furnace 40 is arrange | positioned so that a part of 3rd conveyance belt B3 of the 3rd conveyor 23 may be enclosed.
The heating furnace 40 heats the glass chopped strands S, S,... And the binder P that are loaded on the third conveyor belt B3 of the third conveyor 23 and enter the heating furnace 40. It is configured to be meltable.

  In addition, the atmospheric temperature in the heating furnace 40 is appropriately adjusted so that the temperature is equal to or higher than the melting point of the synthetic resin constituting the binder P to be dispersed.

  A cold pressure roll 50 is arranged on the downstream side of the third conveyor 23. The cold pressure roll 50 includes a pair of rollers 51 and 51.

And the glass chopped strand S * S ... with which the binder P melt | dissolved in the heating furnace 40 adhered is conveyed to the cold pressure roll 50, and passes between roller 51 * 51.
At this time, the glass chopped strands S, S,... Are cooled and pressed by passing through the cold pressure roll 50, and the glass chopped strands S, S,. A mat-like glass chopped strand mat M made of an adhesive P is formed.

A guide member 60 is disposed on the downstream side of the cold pressure roll 50.
The guide member 60 is a plate-like member that guides the glass chopped strand mat M to the winding device 70 that is positioned obliquely below the cold pressure roll 50.

A winding device 70 is disposed on the downstream side of the cold pressure roll 50.
The winding device 70 makes at least a part of the tip portion M1 of the glass chopped strand mat M contact along the outer peripheral surface of the core 72 and is provided linearly over the entire width of the outer peripheral surface of the core 72. It is an apparatus for realizing the process of winding the glass chopped strand mat M into a roll and forming the wound body R by adhering to the adhesive surface A (see FIG. 2) and rotating the winding core 72. is there.
The details of the adhesive surface A will be described later.

  The winding device 70 includes a pair of rolls 71 and 71 that are driven and rotated in the same direction, a guide member 73, and a retracting means (not shown). A winding core 72 is disposed above the upper surface trough between the pair of rolls 71. The winding core 72 is driven and rotated by driving and rotating the pair of rolls 71 and 71.

  The winding device 70 uses the glass chopped strand mat M supplied from one roll 71 side (upstream side) of the pair of rolls 71 and 71 to drive and rotate the pair of rolls 71 and 71 and the core 72. By winding, the wound body R is wound around the outer peripheral surface of the winding core 72 (see FIG. 3E).

  The guide member 73 includes a guide surface 73a having a curvature along the outer peripheral surface of the core 72 and facing the outer peripheral surface with a space therebetween, and is arranged to be movable in a predetermined direction.

When the glass chopped strand mat M is wound up, the guide member 73 is disposed to face the outer peripheral surface of the core 72 with a predetermined interval.
Further, when the tip portion M1 of the glass chopped strand mat M is wound around the outer peripheral surface of the core 72, the tip portion M1 is wound on the upper layer of the glass chopped strand mat M and the core 72. Is sandwiched between.
And if the front-end | tip part M1 of the glass chopped strand mat M is clamped, the evacuation means will arrange | position the induction | guidance | derivation member 73 so that the guide surface 73a may be located outside the outer peripheral position at the time of completion of winding of the glass chopped strand mat M Move away.

[Operation of Winding Device 70]
Next, a series of operations of the winding device 70 that embodies the method of forming the wound body R of the glass chopped strand mat M according to the embodiment of the present invention will be specifically described with reference to FIG.

  The glass chopped strand mat M formed in a strip shape is conveyed at a predetermined speed by using a conveying means such as a conveyor roller. As shown in FIG. 3A, the glass chopped strand mat M has a pair of same directions. It is supplied to the winding device 70 from one side of the rollers 71 and 71 that are driven to rotate (the diagonally upper left side in the figure).

A winding core 72 is disposed so as to be rotatable about a central axis 74 above the upper surface valley between the pair of rolls 71 and 71, and the tip M <b> 1 of the glass chopped strand mat M is wound around the outer peripheral surface of the roller 71. When entering the gap between the outer peripheral surface of the core 72, the winding core 72 rotates following the driving rotation of the roller 71.
Thereby, the glass chopped strand mat M is wound around the outer periphery of the core 72.

A guide member 73 having a guide surface 73 a is disposed along the core 72 on the radially outer side of the core 72.
The guide surface 73a of the guide member 73 has a curvature along the outer periphery of the core 72, and faces the outer peripheral surface of the core 72 with a predetermined interval.

  The tip M1 of the glass chopped strand mat M that has entered the gap between the roller 71 and the winding core 72 is fed by the drive rotation of the roll 71 and the driven rotation of the winding core 72, and is guided to the outer peripheral surface of the winding core 72. It enters the space between the member 73 and the guide surface 73a.

Then, as shown in FIG. 3B, the tip M <b> 1 that has entered the gap portion proceeds while being guided (guided) along the guide surface 73 a of the guide member 73, and contacts along the outer peripheral surface of the core 72. At the same time, the tip portion M1 of the glass chopped strand mat M or a portion near the tip portion M1 adheres to the adhesive surface A (see FIG. 2), and the glass chopped strand mat M is wound around the outer peripheral surface of the core 72.
Here, the portion in the vicinity of the tip portion M1 of the glass chopped strand mat M is, for example, a portion having a size range from the tip of the glass chopped strand mat M to 300 mm in the longitudinal direction of the glass chopped strand mat M.

  Thereafter, as shown in FIG. 3C, the tip M <b> 1 wraps between the glass chopped strand mat M wound on the upper layer and the core 72 after turning around the outer peripheral surface of the core 72. Is done.

Then, the glass chopped strand mat M is wound several times, and as shown in FIG. 3D, the guide member 73 is driven by a retracting means (not shown), and the guide surface 73a is wound around the glass chopped strand mat M. The core 72 retreats in the radial direction (S direction) so as to be located outside the outer peripheral position at the time of completion (the outer peripheral position of the wound body when fully wound).
Thereby, the guide surface 73a of the guide member 73 is not hindered when the glass chopped strand mat M is wound.

  By such a series of operations, the guide surface 73a of the guide member 73 is smoothly wound so that the tip portion M1 of the glass chopped strand mat M is surely laminated on the outer peripheral surface of the core 72 at the initial winding stage. It is possible to follow. In this way, the wound body R of the glass chopped strand mat M as shown in FIG. 3 (e) can be obtained.

  The retraction movement of the guide member 73 may be performed after a predetermined time has elapsed in consideration of the rotational speed of the core 72 (that is, the winding speed of the glass chopped strand mat M), or on the outer periphery of the core 72. It is good also as a structure which detects the thickness of the wound glass chopped strand mat M with a sensor etc., and performs based on the detected value.

  In addition, the moving distance and moving speed of the guide surface 73a of the guide member 73 may be set to values corresponding to the winding speed of the glass chopped strand mat M and the outer diameter of the wound body R when the winding is completed (when fully wound). As long as the guide surface 73a of the guide member 73 does not hinder the winding operation.

As a material constituting the guiding member 73, any material may be used as long as it can realize a mechanical strength sufficient to guide the tip portion M1 of the glass chopped strand mat M, For example, various plastics, FRP, metal, wood, rubber, glass or other materials may be used alone or in combination.
Among them, plastic and FRP are particularly preferable because they have moderate strength, light weight and high moldability.

  As the plastic, for example, acrylic, polyethylene, polypropylene, polyvinyl chloride, polyethylene terephthalate, nylon, polyacetal, polycarbonate, polyphenylene sulfide, polysulfone, polyetherimide, polyetheretherketone, polyimide, or aromatic polyester may be used. However, there is no problem with other plastic materials.

  Further, in addition to the above, the winding device 70 has a guide surface 73a of the guide member 73 concentric with the outer periphery of the winding core 72 in the cross section perpendicular to the central axis 74 of the winding core 72, and is centered on the central shaft 74. If it has an arc shape with an angle range of 120 ° to 270 °, the tip portion M1 of the glass chopped strand mat M can be accurately guided, and the retracting operation of the guide member 73 described above is performed. Therefore, the guide member 73 can be easily moved.

  If the angle of the guide surface 73a of the guide member 73 is less than 120 °, the tip M1 of the glass chopped strand mat M is wound around the winding core 72 depending on the degree of flexibility of the glass chopped strand mat M and the winding speed. May not be possible.

On the other hand, by setting the above angle to 120 ° or more, even if the winding speed becomes high, it can be wound without any trouble, and the glass chopped strand mat with poor thickness and lack of flexibility. An efficient winding operation can be performed on M as well.
In addition, when the said angle exceeds 270 degrees, the retraction movement of the guide member 73 may become difficult.

  From the above viewpoint, in order to make the winding operation and the retracting movement of the guide member 73 smoother, the angle of the guide surface 73a is set within an angle range of 100 ° to 250 °. Is preferred.

  Further, in the winding device 70, in addition to the above, the distance between the guide surface 73a of the guide member 73 and the outer peripheral surface of the winding core 72 is at least twice as large as the thickness dimension of the glass chopped strand mat M. When the glass chopped strand mat M is wound, the glass chopped strand mat M can be wound around the winding core 72 surely and accurately without causing any defects such as damage on the surface. preferable.

  Here, said space | interval is the shortest distance between the guide surface 73a of the guide member 73, and the outer periphery of a winding cylinder.

The thickness dimension of the glass chopped strand mat M varies depending on the type of glass fiber and its use, but has a thickness of 0.05 mm to 10 mm.
Therefore, it is preferable that the above-mentioned interval is about 0.1 mm to about 50 mm.

If the spacing is excessively large, wrinkles may easily occur in the glass chopped strand mat M, and it becomes difficult to obtain a wound body R having a stable quality. On the other hand, if the distance exceeds 5 times the thickness dimension of the glass chopped strand mat M, the guiding function of the guide surface 73a may not be obtained.
Therefore, it is preferable that the above-mentioned interval is in the range of 2 to 5 times the thickness dimension of the glass chopped strand mat M. For example, specific dimensions are in the range from 0.1 mm to 50 mm.

  Moreover, in the winding apparatus 70 mentioned above, it is preferable to wind the glass chopped strand mat M around the winding core 72 at a winding speed of 40 m / min to 100 m / min to form the wound body R of the glass chopped strand mat M. .

  When the winding speed of the glass chopped strand mat M is less than 40 m / min, the production efficiency is not improved in mass production, which is not economical. On the other hand, if the winding speed exceeds 100 m / min, even if the glass chopped strand mat M comes into contact with the outer peripheral surface of the core 72, it is not preferable because the winding is not followed by the rotation of the core.

  From the above viewpoint, in order to perform winding with higher quality and high stability, the winding speed is preferably in the range of 50 m / min to 90 m / min, more preferably 60 m / min to 90 m / min. It is set as the range of minutes, More preferably, it is set as 70 m / min-90 m / min.

The composition of the glass fiber constituting the glass chopped strand mat M is not particularly limited as long as it exhibits desired performance, and glass fibers having various compositions can be used.
For example, it may be a glass fiber having a typical composition such as E glass, D glass, C glass, AR glass, H glass, or S glass, or may have another composition.

The winding core 72 is a cylinder for winding the glass chopped strand mat M, and is, for example, a paper tube having a paper material such as a paper tube base paper, kraft paper, or wrapping paper as a structural material.
The winding core 72 is manufactured in a cylindrical shape while rotating the above-mentioned base paper on a metal shaft core called a mandrel, with the above-mentioned base paper being stacked in layers.

  For the purpose of a decorative finish, top-coated paper such as wrapping paper or wrapping paper is used on the outer peripheral surface of the core 72.

  Further, the core 72 is preferably the above-described paper tube in consideration of economy, but when the mechanical strength is important, it is made of a material such as plastic or FRP, for example. Also good. The detailed configuration of the core 72 will be described in the following description of the forming method.

  The method of forming the wound body R of the glass chopped strand mat M according to the embodiment of the present invention is a method of forming the wound body R of the strip-shaped glass chopped strand mat M including the glass chopped strand S, and the glass chopped The glass chopped strand mat M is wound in a roll shape by rotating at least a part of the tip M1 of the strand mat M along the outer peripheral surface of the core 72 and rotating the core 72. The outer peripheral surface of the core 72 includes an adhesive surface A having an adhesive force measured in accordance with a method defined in JIS K 0237 (2009) of 0.3 to 2.0 N / 10 mm. A winding core 72 having the above is used.

  The adhesive strength of the adhesive surface A of the core 72 is 0.3 N / 10 mm or more and 2.0 N / 10 mm or less. When the adhesive strength is less than 0.3 N / 10 mm, stability when the glass chopped strand mat M is reliably wound around the core 72 is poor, and wrinkles and misalignment occur. Even if the glass chopped strand mat M is wound around the winding core 72, the glass chopped strand mat M is slackened because the winding core 72 rotates idly without being bonded to the adhesive surface A of the winding core 72 at the initial winding stage. It occurs, and winding misalignment and wrinkles enter to eliminate the sagging.

  On the other hand, when the adhesive strength of the adhesive surface A exceeds 2.0 N / 10 mm, the adhesion between the glass chopped strand mat M and the core 72 is improved, and the glass chopped strand mat M does not wrinkle or shift on the core 72. However, when the glass chopped strand mat M is pulled out from the core 72, the glass chopped strand mat M is broken without being peeled off from the adhesive surface A, and the glass chopped strand mat is completely removed. M cannot be used.

  Further, the adhesive strength of the adhesive surface A is preferably 0.4 N / 10 mm or more and 1.5 N / 10 mm or less, and more preferably 0.4 N / 10 mm or more and 1.0 N / 10 mm or less.

  The dynamic friction coefficient defined in JIS K 7125 (1999) between the non-adhesive surface which is a portion excluding the adhesive surface A of the outer peripheral surface of the core 72 (for example, the surface of the paper material) and the glass chopped strand mat M is It is preferable that it is 0.15-0.35.

  That is, the coefficient of dynamic friction between the glass chopped strand mat M and the non-adhesive surface of the core 72 measured in accordance with the method defined in JIS K 7125 (1999) described above is 0.15 to 0.35. It is preferable to use a winding core 72 that has been processed and adjusted in advance so as to have a predetermined dynamic friction coefficient so as to be in the range of. As a method for adjusting the static friction coefficient between the glass chopped strand mat M and the non-adhesive surface of the core 72, for example, the material of the surface of the core 72 is appropriately changed, or the friction is adjusted on the surface of the core 72. For example, a coating agent for adjusting the surface roughness or adjusting the surface roughness of the surface of the core 72 may be used.

  When the dynamic friction coefficient is less than 0.15, the stability when the glass chopped strand mat M is directly wound around the winding core 72 is poor, and even if the glass chopped strand mat M is wound around the winding core 72, the adhesive The idle rotation of the winding core 72 before the surface A and the glass chopped strand mat M adhere to each other causes sagging in the glass chopped strand mat M, and loosening and wrinkles are likely to occur in order to eliminate the sagging.

  On the other hand, when the coefficient of dynamic friction exceeds 0.35, the slipping property between the glass chopped strand mat M and the core 72 is extremely lowered, and the tip portion M1 of the glass chopped strand mat M is the outer peripheral surface (outer surface) of the core 72. Winding action works strongly at the moment when it comes into contact with), and winding starts before it comes into contact with the adhesive surface A and the glass chopped strand mat M. As a result, the glass chopped strand mat M is wound in a distorted state and the winding misalignment and the glass chopped strand mat M are wrinkled, the winding shape of the entire wound body R becomes extremely bad, and the glass chopped strand mat is further deteriorated. It is easy to damage the surface of M.

  The dynamic friction coefficient is more preferably 0.16 to 0.34.

  As a method of forming the adhesive surface A, for example, a double-sided tape 75 (see FIG. 2) having a desired adhesive force can be used. Specifically, the adhesive surface A is formed on the outer peripheral surface of the core 72 by sticking one adhesive surface of the double-sided tape 75 to the outer peripheral surface of the core 72 (for example, the surface of the paper material). The other adhesive surface of the double-sided tape 75 is used. Thereby, the adhesive surface A can be easily formed in an arbitrary region on the outer peripheral surface of the core 72.

  Moreover, it is preferable that the adhesive force of one said adhesive surface among the said double-sided tapes 75 is stronger than the adhesive force of the adhesive surface A which is said other adhesive surface. That is, the adhesive force measured in accordance with the method prescribed in JIS K 0237 (2009) of the adhesive surface (adhesive surface on the core side) of the double-sided tape 75 to be adhered to the outer peripheral surface of the core 72 is measured. It is preferable that the adhesive force (adhesive surface A on the mat side) to be adhered to the glass chopped strand mat M is larger than the adhesive force measured according to the method defined in JIS K 0237 (2009). Thereby, when pulling out the glass chopped strand mat M, it is possible to prevent the double-sided tape 75 from being peeled off from the core 72 and being attached to the glass chopped strand mat M. For example, in order to prevent the double-sided tape 75 from being peeled off from the core 72, it is preferable that the adhesive strength of the adhesive surface on the core side is 10 N / 10 mm or more.

  The width of the double-sided tape 75 is preferably 5 mm or more and 15 mm or less. When the width of the double-sided tape 75 is less than 5 mm, it is not preferable because it is difficult to stably wind the glass chopped strand mat M around the core 72. On the other hand, when the width of the double-sided tape 75 exceeds 15 mm, the winding action is strong at the moment when the tip M1 of the glass chopped strand mat M comes into contact with the surface of the core 72, and before the adhesive surface A and the glass chopped strand mat M come into contact. Since the winding starts from the beginning, the winding is wound in a distorted state, wrinkles are formed in the winding misalignment or the glass chopped strand mat M, the winding shape of the entire wound body R is extremely deteriorated, and further, the glass chopped strand mat M Or damage the surface.

  For example, when the adhesive surface A is formed by the double-sided tape 75, the range where the double-sided tape 75 is applied to the outer peripheral surface of the core 72 extends over the entire width along the central axis direction of the core 72, as shown in FIG. It may be about half of the entire width of the winding core 72. Further, the double-sided tape 75 may be divided and attached in a plurality along the width direction. Preferably, a double-sided tape 75 having a length of 50% or more of the entire width of the winding core 72 is attached. By attaching the double-sided tape 75 to the circumferential direction of the core 72 at two or more locations, the glass chopped strand mat M can be surely wound around the core 72. Further, the double-sided tape 75 may be affixed to any location such as one location or a plurality of locations along the circumferential direction of the core 72.

  Moreover, as a method of forming the adhesive surface A, a method of applying a synthetic resin (for example, urethane resin) adhesive to the outer peripheral surface of the core 72 instead of using a double-sided tape may be used. Thereby, an adhesive surface can be easily formed in an arbitrary region of the outer peripheral surface of the core, as in the case of the double-sided tape described above, without generating waste such as release paper of the double-sided tape.

As a means for setting the above-described dynamic friction coefficient, specifically, it is preferable that the surface of the upper adhesive paper used on the outer periphery of the core 72 is kraft paper having a large dynamic friction coefficient.
Since the dynamic friction coefficient varies depending on the type and thickness of the kraft paper, it is preferable to select a kraft paper suitable for the glass chopped strand mat M.
Moreover, in order to make it hard to damage the surface of the glass chopped strand mat M, it is preferable that the outer peripheral surface of the core 72 excluding the adhesive surface A is covered with the same material.

The basis weight of the glass chopped strand mat M is preferably 70 g / m ² or more and 150 g / m ² or less.
When the basis weight is less than 70 g / m ² , the friction coefficient of the surface of the glass chopped strand mat M becomes small, and the rigidity of the glass chopped strand mat M decreases and wrinkles easily occur. It is difficult to wind up.
On the other hand, if the basis weight is 150 g / m ² or more, the rigidity of the mat is improved, so that it becomes difficult for the glass chopped strand mat M to follow the rotation of the winding core 72 or the winding deviation increases.
Further, the basis weight of the glass chopped strand mat M is more preferably 80 g / m ² or more and 145 g / m ² or less.

  The wound body R of the glass chopped strand mat M according to one embodiment of the present invention can be mainly formed by the above-described method.

  A wound body R of the glass chopped strand mat M is a wound body 72 of a glass chopped strand mat M having a winding core 72 and a roll-shaped glass chopped strand M wound around the winding core 72. The outer peripheral surface of the core 72 has an adhesive surface A having an adhesive force measured in accordance with JIS K 0237 (2009) of 0.3 to 2.0 N / 10 mm. Such a wound body R of the glass chopped strand M can be easily pulled from the core 72 even if the pulled glass chopped strand mat M is pulled when the glass chopped strand mat M is pulled out and used up. Since the adhesive force of the adhesive surface A is set so as to be separated from each other, the occurrence of damage such as tearing can be prevented.

  Further, the outer peripheral surface of the winding core 72 has a coefficient of dynamic friction defined in JIS K 7125 (1999) between the portion other than the adhesive surface A and the glass chopped strand mat M of 0.15 to 0.35. Having a non-adhesive surface. Such a wound body R of the glass chopped strand M has less wrinkles of the glass chopped strand mat M.

  Next, examples will be described to describe the present invention more specifically. However, the present invention is not limited to these examples, and various applications can be made within the scope of the claims.

[Evaluation of winding state of wound body]
Using the winding device 70 described above, winding is performed by changing each winding condition of the basis weight of the glass chopped strand mat M, the adhesive force of the adhesive surface A, and the frictional force (dynamic friction coefficient), and the following examples and comparative examples A wound body R of the glass chopped strand mat M shown in FIG.
The outer peripheral material constituting the outer peripheral surface (excluding the adhesive surface A) of the used winding core 72 and the surface of each glass chopped strand mat M (the surface that comes into contact with the outer peripheral member at the initial winding stage) are JIS K 7125 ( 1999), the coefficient of dynamic friction was measured by a method based on the method specified in 1999).

[Examples and Comparative Examples]
(Example 1) Stock having an adhesive strength of 0.45 N / 10 mm over the entire width of a paper core having a core width of 1.44 m, an inner diameter of the core of 102 mm, and an outer diameter of the core of 107 mm. A double-sided tape T3820 (tape width 15 mm) manufactured by Nitoms Co., Ltd. was attached.
Moreover, the dynamic friction coefficient of the part except the area | region which affixed the double-sided tape on the outer peripheral surface of a winding core and a glass chopped strand mat was 0.28. Using this winding core, a glass chopped strand mat M having a mat basis weight of 107 g / m ² and a width of 1.44 m was wound at a mat winding speed of 40 m / min to prepare a wound body.

(Example 2) Using the same core as in Example 1, a chopped strand mat having a mat basis weight of 80 g / m ² and a width of 1.44 m was wound at a mat winding speed of 40 m / min to prepare a wound body. .

(Example 3) Using the same core as in Example 1, a glass chopped strand mat having a mat basis weight of 135 g / m ² and a width of 1.44 m was wound at a winding speed of 40 m / min to prepare a wound body.

  (Example 4) In Example 1, a core whose surface material was changed so that the dynamic friction coefficient of the portion except the region where the double-sided tape was applied on the outer peripheral surface of the core and the glass chopped strand mat was 0.10 was used. Except for the above, a glass chopped strand mat having the same conditions as in Example 1 was wound around the core to produce a wound body.

  (Example 5) In Example 1, the core whose surface material was changed so that the dynamic friction coefficient of the portion excluding the region where the double-sided tape was applied on the outer peripheral surface of the core and the glass chopped strand mat was 0.42 was used. Except for the above, a glass chopped strand mat having the same conditions as in Example 1 was wound around the core to produce a wound body.

(Example 6) Acrylic resin was adjusted and applied so that the adhesive strength was 1.2 N / 10 mm instead of the double-sided tape of Example 1 over the entire width of the core similar to Example 1. Using this core, a glass chopped strand mat having a mat basis weight of 107 g / m ² and a width of 1.44 m was wound at a winding speed of 40 m / min to produce a wound body.

(Comparative Example 1) A double-sided tape Nystack NW-15 manufactured by Nichiban Co., Ltd. having an adhesive strength of 4.3 N / 10 mm instead of the double-sided tape of Example 1 over the entire width of the core as in Example 1. A tape width of 15 mm) was attached. Using this core, a glass chopped strand mat having a mat basis weight of 107 g / m ² and a width of 1.44 m was wound at a winding speed of 40 m / min to produce a wound body.

(Comparative Example 2) A double-sided tape 924 (width 15 mm) manufactured by 3M having an adhesive strength of 2.7 N / 10 mm is pasted over the entire length of the core similar to that of Example 1 instead of the double-sided tape of Example 1. I attached. Using this core, a glass chopped strand mat having a mat basis weight of 107 g / m ² and a width of 1.44 m was wound at a winding speed of 40 m / min to produce a wound body.

(Comparative example 3) Without performing any treatment on the same core as in Example 1, a glass chopped strand mat having a mat basis weight of 107 g / m ² and a width of 1.44 m was wound at a winding speed of 40 m / min. A wound body was produced.

  Regarding the winding state of the winding body of the glass chopped strand mat, “winding property evaluated based on looseness at winding, deviation from the winding core (winding deviation), wrinkle when the mat is pulled out” The film was visually evaluated for tearing caused by the tape when the mat was pulled out. Table 1 shows the evaluation results of the wound bodies in the above Examples and Comparative Examples.

(Criteria: torn)
○: The glass chopped strand mat could be pulled out from the core without tearing △: A part of the glass chopped strand mat was torn during pulling and there was a problem in quality ×: The glass chopped strand mat was torn across the entire width when pulled out There is a quality problem

(Criteria: Winding property)
◎: No wobbling, winding deviation or wrinkle is generated, and winding property is very good. ○: Slight wobbling, winding deviation, wrinkle is generated, but there is no problem in quality. △: Bumping, winding deviation, wrinkle. Occurrence and quality problems ×: Strong bumping, winding displacement, wrinkles, and quality problems

As is clear from Table 1, in Examples 1 to 5, each of the glass chopped strand mats having different basis weights is directly used by using a predetermined double-sided tape as a member for bonding the core and the glass chopped strand mat. It was possible to reliably wind the wound core, and a wound body having a good winding shape could be produced efficiently and stably, and the glass chopped strand mat was not broken during drawing.
In Example 6, by using an acrylic resin as a member for bonding the core to the glass chopped strand mat, the glass chopped strand mat can be reliably wound directly on the core, and the winding shape is good. The wound body could be produced efficiently and stably, and the glass chopped strand mat was not broken when pulled out.
On the other hand, in Comparative Examples 1 and 2, since the adhesive strength of the double-sided tape was too great, the glass chopped strand mat was broken when pulled out.
Further, in Comparative Example 3, the wound body was produced by a conventionally used method without performing any treatment on the winding core, and since it does not have an adhesive surface such as a double-sided tape, it was torn. Although there was no occurrence of bumps, winding deviations and wrinkles were confirmed, the winding properties were very poor.

From the above, according to the method for forming the wound body R of the glass chopped strand mat M according to one embodiment of the present invention, the basis weight of the glass chopped strand mat M is 70 g / m ² or more and 150 g / m ² or less. There is a core 72 having an adhesive surface A having an adhesive force of 0.3 to 2.0 N / 10 mm measured on the outer peripheral surface of the core 72 in accordance with a method defined in JIS K 0237 (2009). By using it, the core 72 and the tip portion M1 of the glass chopped strand mat M can be bonded and reliably wound, and a wound body R with a good winding shape can be produced efficiently. Further, when the glass chopped strand mat M is pulled out from the wound body R of the glass chopped strand mat M and used up, the glass chopped strand mat M is separated from the core 72 even if the drawn glass chopped strand mat M is pulled. Since the adhesive strength of the adhesive surface A is set, the occurrence of damage such as tearing can be prevented.

Moreover, in the formation method of the wound body R of the glass chopped strand mat M according to this embodiment, the content of the binder P in the glass chopped strand mat M is preferably 5.0 to 13.0% by mass.
That is, when the binder is less than 5.0% by mass, the effect as the binder cannot be exhibited, and when the binder exceeds 13.0% by mass, the binder 72 becomes slippery with respect to the outer peripheral surface. For this reason, it is difficult to stably wind around the core.

Moreover, in the formation method of the wound body R of the glass chopped strand mat M according to this embodiment, the outer diameter of the core 72 is preferably 50 to 150 mm.
That is, when the outer diameter dimension of the winding core 72 is less than 50 mm, the winding efficiency of the glass chopped strand mat M is deteriorated. When the outer diameter dimension of the winding core 72 exceeds 150 mm, the volume of the winding core itself is increased. This is because the handling of the body R deteriorates.

  In addition, the wound body R of the glass chopped strand mat M according to this embodiment has the glass chopped strand mat M pulled out even when the glass chopped strand mat M is pulled when the glass chopped strand mat M is pulled out and used up. Since the adhesive force of the adhesive surface A is set so as to be away from the core 72, occurrence of damage such as tearing can be prevented.

Next, the manufacturing method of the wound body R of the glass chopped strand mat M according to one embodiment of the present invention will be described using the manufacturing apparatus 1 described above.
The manufacturing method of the glass chopped strand mat M according to the embodiment of the present invention can be realized by the manufacturing apparatus 1.

  As shown in FIG. 1, in the method of manufacturing the wound body R of the glass chopped strand mat M according to this embodiment, first, the glass chopped strand S · S is placed on the first conveyor belt B1 of the first conveyor 21. The step of depositing (STEP-1) is performed.

  Next, a step (STEP-2) of applying the binder P to the glass chopped strands S, S,... On the second conveyance belt B2.

  Next, a step (STEP-3) of heating and melting the binder P on the third conveyance belt B3 is performed.

  Next, a step (STEP-4) of cooling the glass chopped strands S, S... Having the binder P heated and melted to cure the binder P is performed.

  Next, the process of forming the winding body R by winding the glass chopped strand mat M around the winding core 72 by the method for manufacturing the winding body R of the glass chopped strand mat M using the winding device 70 described above (STEP- 5) is performed. In this step, before attaching the core 72 to the winding device 70, the double-faced tape 75 having a predetermined adhesive force is attached to the outer surface of the core 72 to the outer surface of the core 72. Forming a pressure-sensitive adhesive surface A;

  According to such a configuration, in the step of forming the wound body R (STEP-5), winding is performed using the double-sided tape 75 that is a member for bonding the core 72 and the tip portion M1 of the glass chopped strand mat M. An adhesive surface A is formed on the outer peripheral surface of the core 72, and the tip portion M1 of the glass chopped strand mat M or a portion in the vicinity thereof is adhered to the outer peripheral surface of the core 72 and is directly wound around the core 72 to be surely wound. Can be formed, and a wound body R with a good winding shape in which the occurrence of winding deviation and wrinkles of the mat is suppressed can be efficiently produced.

  Next, the wound body R of the glass chopped strand mat M according to one embodiment of the present invention will be described.

  A wound body R of a glass chopped strand mat M is a wound body R of a glass chopped strand mat M having a winding core 72 and a roll-shaped glass chopped strand M wound around the winding core 72. The outer peripheral surface of the core 72 has an adhesive surface A having an adhesive force measured in accordance with JIS K 0237 (2009) of 0.3 to 2.0 N / 10 mm. According to such a structure, generation | occurrence | production of damage, such as a tear of the glass chopped strand mat M, can be prevented.

  The method of forming a wound body of glass chopped strand according to the present invention cuts a flexible web such as paper, a polymer film, a cloth, a metal web, and an original web in which a coating liquid is applied to the support. It can be used when winding a belt-shaped material around a winding core to produce a wound body (roll-shaped material). For example, cutting and winding processes for various paper coating, adhesive and adhesive materials, electrical and electronic component materials, etc. Can be used for

70 Winding device 72 Winding core 75 Double-sided tape A Adhesive surface S Glass chopped strand M Glass chopped strand mat M1 Tip R Rolled body

Claims (9)

A method of forming a wound body of a strip-shaped glass chopped strand mat containing glass chopped strands,
The glass chopped strand mat is wound into a roll to form a wound body by rotating at least a part of the tip of the glass chopped strand mat along the outer peripheral surface of the core and rotating the core. With a process,
The outer peripheral surface of the core has an adhesive surface whose adhesive force measured according to JIS K 0237 (2009) is 0.3 to 2.0 N / 10 mm.
A method for forming a wound body of a glass chopped strand mat characterized by the above. The outer peripheral surface of the core is
In the part excluding the adhesive surface,
Between the said glass chopped strand mat, it has a non-adhesive surface whose dynamic friction coefficient prescribed | regulated to JISK7125 (1999) is 0.15-0.35,
The method for forming a wound body of a glass chopped strand mat according to claim 1. The adhesive surface is
Constituted by the other adhesive surface of the double-sided tape, which is attached to the outer peripheral surface of the core via one adhesive surface of the double-sided tape,
A method for forming a wound body of a glass chopped strand mat according to claim 1 or 2. The adhesive surface is composed of a synthetic resin adhesive,
A method for forming a wound body of a glass chopped strand mat according to claim 1 or 2. In the double-sided tape,
The adhesive force measured in accordance with JIS K 0237 (2009) of the one adhesive surface is compared with the adhesive force measured in accordance with JIS K 0237 (2009) of the other adhesive surface. Big
The method for forming a wound body of a glass chopped strand mat according to claim 3. Basis weight of the glass chopped strand mat ^is a ^{70g / m 2 ~150g / m 2} ,
The method for forming a wound body of a glass chopped strand mat according to any one of claims 1 to 5, wherein The winding speed when winding the glass chopped strand mat is 40 m / min to 100 m / min.
The method for forming a wound body of a glass chopped strand mat according to any one of claims 1 to 6. A wound body of a glass chopped strand mat having a winding core and a roll-shaped glass chopped strand wound around the winding core,
The outer peripheral surface of the core has an adhesive surface whose adhesive force measured according to JIS K 0237 (2009) is 0.3 to 2.0 N / 10 mm.
A rolled body of a glass chopped strand mat characterized by that. The outer peripheral surface of the core is
In the part excluding the adhesive surface,
Between the said glass chopped strand mat, it has a non-adhesive surface whose dynamic friction coefficient prescribed | regulated to JISK7125 (1999) is 0.15-0.35,
The wound body of the glass chopped strand mat according to claim 8.

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