Patent Publication Number: US-2023146715-A1

Title: Cold protection material and method for manufacturing same

Description:
TECHNICAL FIELD 
     The present invention relates to a cold protection material and a method for manufacturing the same. 
     BACKGROUND ART 
     Conventionally, as disclosed in the following Patent Literatures 1 and 2, a cold protection material used for a cold proof garment is known. Since this type of cold protection material has a configuration in which a filler such as down, feathers, or batting is filled in a space between a first fabric and a second fabric, heat retaining property is secured. In order to form the space filled with the filler between the first fabric and the second fabric as described above, in the cold protection material disclosed in Patent Literature 1, a strip member  80  is used as illustrated in  FIGS.  10  and  11   . The strip member  80  is a strip member having a predetermined width and long in one direction, one edge portion  80   a  in a width direction is seamed to a first fabric  81 , and the other edge portion  80   b  in the width direction is seamed to a second fabric  82 . When seaming the strip member  80  to the first fabric  81  and the second fabric  82 , first, the strip member  80  is folded into two at a center portion in the width direction as illustrated in  FIG.  12   , and in this state, an intermediate position of one folded portion  80   c  is sewn to the first fabric  81 . Then, as illustrated in  FIG.  13   , the other folded portion  80   d  is sewn to the second fabric  82 . Thereafter, a distance between the first fabric  81  and the second fabric  82  is increased, and a filler  83  is filled in a space formed between the fabrics  81  and  82 . Note that although the strip member  80  is folded in a substantially U shape in  FIG.  10   , the strip member  80  may be folded in a substantially Z shape as illustrated in  FIG.  11   . In this case, the strip member  80  is sewn to the first fabric  81  and the second fabric  82  in a state of being folded into three in the width direction. 
     In the cold protection material disclosed in Patent Literature 2, a strip member made of a mesh tape is folded into three in the width direction, and an adhesive tape is sewn to each of both end portions. Then, one adhesive tape is bonded to the first fabric, and the other adhesive tape is bonded to the second fabric. In this configuration, the strip member is folded in a substantially Z shape. However, since the strip member is bonded to the first fabric and the second fabric, no sewing hole is formed in the fabric. Therefore, it is possible to prevent the filler from protruding out through the sewing hole. 
     As described above, in the cold protection materials disclosed in Patent Literatures 1 and 2, the strip member is used, and when the filler is stored between the first fabric and the second fabric, an operation is necessary to deform the strip member so as to increase the distance between the first fabric and the second fabric. That is, the strip member is made of a material to be folded in the width direction so as to be sewn or bonded to the first fabric. Therefore, as illustrated in  FIG.  13   , in a state before the filler  83  is filled, a gap width between the first fabric  81  and the second fabric  82  is very narrow, and thus, in order to insert the filler  83  between the fabrics  81  and  82 , an operation is necessary to increase the distance between the first fabric  81  and the second fabric  82 . 
     CITATION LIST 
     Patent Literatures 
     Patent Literature 1: Japanese Patent No. 6226703 
     Patent Literature 2: Japanese Patent No. 6247431 
     SUMMARY OF INVENTION 
     An object of the present invention is to provide a cold protection material capable of reducing a work load when filling a filler between an outer fabric and an inner fabric. 
     The cold protection material according to an aspect of the present invention is a cold protection material used for a cold proof garment, including: an outer fabric constituting a front fabric of the cold proof garment or constituting a fabric disposed on a back side of the front fabric; an inner fabric disposed inside the outer fabric; two connecting members bonded to the outer fabric and the inner fabric to form a space between the outer fabric and the inner fabric; and a filler stored in the space. Each of the two connecting members has an outer surface bonded to the outer fabric and an inner surface bonded to the inner fabric, and has air permeability. Each of the two connecting members is formed of a flexible material, and is soft enough not to be deformed to reduce a distance between the outer surface and the inner surface by a weight of the outer fabric or the inner fabric. 
     A method for manufacturing the cold protection material according to the aspect of the present invention includes: placing two connecting members respectively at predetermined positions with an outer surface or an inner surface facing upward; placing one of an outer fabric and an inner fabric on the two connecting members placed at the predetermined positions; pressing the one of the outer fabric and the inner fabric from above to bond the one of the outer fabric and the inner fabric to the two connecting members; placing the one of the outer fabric and the inner fabric to which the two connecting members are bonded is placed on a press stand such that the two connecting members face up; bonding the other of the outer fabric and the inner fabric to the two connecting members bonded to the one of the outer fabric and the inner fabric; and inserting a filler into a space between the two connecting members that is the space between the outer fabric and the inner fabric. 
     As described above, according to the present invention, it is possible to reduce the work load when filling the filler between the outer fabric and the inner fabric. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG.  1    is a perspective view of a cold protection material. 
         FIG.  2    is a view of a back body using the cold protection material. 
         FIG.  3    is a schematic view of a connecting member constituting the cold protection material. 
         FIG.  4    is a modification of the connecting member. 
         FIG.  5    is another modification of the connecting member. 
         FIG.  6    is a perspective view of a receiving member used when the cold protection material is manufactured. 
         FIG.  7    is a view for describing the cold protection material in a state before being disposed in the receiving member. 
         FIG.  8    is a view for describing a step of bonding the connecting member to an outer fabric. 
         FIG.  9    is a view for describing a step of bonding the connecting member to an inner fabric. 
         FIG.  10    is a view illustrating a conventional cold protection material. 
         FIG.  11    is a view illustrating another conventional cold protection material. 
         FIG.  12    is a view for describing a step of sewing a strip member to a first fabric. 
         FIG.  13    is a view illustrating a state in which the strip member is sewn to the first fabric and a second fabric. 
     
    
    
     DESCRIPTION OF EMBODIMENT 
     Hereinafter, an embodiment will be described with reference to the accompanying drawings. Note that the following embodiment is an example embodying the present invention, and is not intended to limit the technical scope of the present invention. 
     A cold protection material  10  illustrated in  FIG.  1    is a material used as an element of a cold proof garment having heat retaining property. The cold proof garment is, for example, a garment such as a jacket, a vest, pants, a coat, a blouson, or a parker, and is a garment excellent in heat retaining property. The cold protection material  10  may be configured as a back body  1  of the jacket, for example, as illustrated in  FIG.  2   . Note that  FIG.  1    illustrates only a part of the cold protection material  10  constituting the back body  1 . The cold protection material  10  may not be formed to constitute the back body  1 , but may be formed to constitute a front body, a side body, a sleeve, a collar, and the like. The cold protection material  10  may be formed to constitute a rise or an inseam of the pants. 
     As illustrated in  FIG.  1   , the cold protection material  10  includes an outer fabric  12 , an inner fabric  14 , at least two connecting members  16  and  16 , and a filler  18 . 
     The outer fabric  12  may constitute a front fabric (an outer fabric) of the cold proof garment, and instead of this, may constitute a fabric disposed on a back side of the front fabric. The outer fabric  12  is made of synthetic fiber fabric having no air permeability or synthetic fiber fabric having almost no air permeability. 
     The inner fabric  14  is a fabric disposed inside the outer fabric  12 , and is made of, for example, a back fabric of the cold proof garment. However, the inner fabric  14  may not be made of the back fabric of the cold proof garment. The inner fabric  14  may be made of, for example, a fabric located outside the back fabric in the cold proof garment (for example, when the cold proof garment has a four-layer structure, a fabric of the third layer from the outside). 
     Each of the two connecting members  16  and  16  is a member that connects the outer fabric  12  and the inner fabric  14 , and is formed in a strip shape elongated in one direction. The two connecting members  16  and  16  extend linearly in a state of being arranged parallel to each other. However, the present embodiment is not limited to this form, and the connecting members  16  may be bent or may not be parallel to each other. 
     An outer surface  16   a  (that is, one of surfaces perpendicular to the one direction) of the connecting member  16  is bonded to the outer fabric  12 . An inner surface  16   b  of the connecting member  16  facing a side opposite to the outer surface  16   a  is bonded to the inner fabric  14 . The connecting member  16  and the outer fabric  12  are bonded by using a thermoplastic adhesive (hot melt), a solvent-based adhesive, a moisture curable adhesive, a UV curable adhesive, or an acrylic adhesive (adhesive that is not crosslinked). The connecting member  16  and the inner fabric  14  are also bonded in the same manner. 
     The two connecting members  16  and  16  are coupled to the outer fabric  12  and the inner fabric  14 , so that a space  20  is formed by the outer fabric  12 , the inner fabric  14 , and the two connecting members  16  and  16 . That is, the two connecting members  16  and  16  are members for forming a closed space  20  between the outer fabric  12  and the inner fabric  14 . 
     Each connecting member  16  is formed of a flexible material. However, each connecting member  16  is soft enough not to be deformed to reduce a distance between the outer surface  16   a  and the inner surface  16   b  by the weight of the outer fabric  12  or the inner fabric  14 . That is, since each connecting member  16  has strength enough not to be crushed or bent by the weight of the outer fabric  12  or the inner fabric  14 , even when the space  20  is not filled with the filler  18 , a distance between the outer fabric  12  and the inner fabric  14  in the vicinity of the connecting member  16  is not reduced. 
     Each connecting member  16  has air permeability. Therefore, since the air can pass through the connecting member  16 , the air can flow into and out of the space  20  through the connecting member  16 . 
     The filler  18  is stored in the space  20 . The filler  18  is a material such as feathers, down, or cotton, and contributes to the cold protection material  10  exhibiting heat retaining property by being confined in the space  20 . 
     As illustrated in  FIG.  3   , each connecting member  16  is made of a double raschel knitted fabric. That is, the connecting member  16  is configured in a three-layer structure including a front fabric  24 , a back fabric  25 , and a ventilation layer  26 . A front surface of the front fabric  24  forms the outer surface  16   a  of the connecting member  16 , and a back surface of the back fabric  25  forms the inner surface  16   b  of the connecting member  16 . The front surface of the front fabric  24  is bonded to the outer fabric  12 , and the back surface of the back fabric  25  is bonded to the inner fabric  14 . Then, the ventilation layer  26  is coupled to a back surface of the front fabric  24  and is coupled to a front surface of the back fabric  25 . Note that the ventilation layer  26  may be bonded to the back surface of the front fabric  24  or may be bonded to the front surface of the back fabric  25 . 
     Each of the front fabric  24  and the back fabric  25  may be made of, for example, a blended fabric (woven fabric) of nylon and polyurethane, or may be made of a polyester fabric (woven fabric). Further, the front fabric  24  and the back fabric  25  may be made of different fabrics. 
     The ventilation layer  26  is a portion that ensures air permeability in the connecting member  16 , and is located between the front fabric  24  and the back fabric  25 . The ventilation layer  26  is made of a knitted fabric  26   a.  The knitted fabric  26   a  is knitted into the front fabric  24  and the back fabric  25 . Therefore, the front fabric  24  is not easily peeled off from the ventilation layer  26 , and the back fabric  25  is also not easily peeled off from the ventilation layer  26 . 
     Note that the ventilation layer  26  may be made of a foam  26   b  instead of the knitted fabric  26   a.  In this case, the ventilation layer  26  is made of the foam  26   b  having a rectangular parallelepiped shape, and the foam  26   b  is bonded to the front fabric  24  and the back fabric  25 . Further, as illustrated in  FIG.  4   , laminate layers  26   c  and  26   d  may be respectively bonded to a front surface and a back surface of the foam  26   b,  the front fabric  24  may be bonded to the laminate layer  26   c  on the front side, and the back fabric  25  may be bonded to the laminate layer  26   d  on the back side. 
     Further, the ventilation layer  26  may be made of a woven fabric or a nonwoven fabric instead of the knitted fabric  26   a.  When the ventilation layer  26  is made of a woven fabric, the woven fabric is preferably rougher than the front fabric  24  and the back fabric  25 . 
     Each connecting member  16  has a width w in the lateral direction of 1 time or more and 5 times or less a width h in the height direction, and the width w in the lateral direction of 3 mm or more and 15 mm or less. However, the present embodiment is not limited to this size, and the connecting member  16  may have other sizes. 
     Note that the connecting member  16  is not limited to a form made of a double raschel knitted fabric. For example, as illustrated in  FIG.  5   , the connecting member  16  may be made of a foam  28 . The foam  28  is formed in a strip shape elongated in one direction, an outer surface  28   a  (that is, one of surfaces perpendicular to the one direction) is bonded to the outer fabric  12 , and an inner surface  28   b  facing a side opposite to the outer surface  28   a  is bonded to the inner fabric  14 . 
     Here, a method for manufacturing the cold protection material  10  will be described with reference to  FIGS.  6  to  9   . Here, a method of first bonding the connecting member  16  to the outer fabric  12  and then bonding the inner fabric  14  will be described. However, a method of first bonding the inner fabric  14  and then bonding the outer fabric  12  may also be performed. In this case, the method is different in that the order of use of the outer fabric  12  and the inner fabric  14  is reversed, but since other points are the same, descriptions thereof will be omitted here. 
     A receiving member  30  illustrated in  FIG.  6    is used to manufacture the cold protection material  10 . The receiving member  30  is made of, for example, a silicone mat, and at least two grooves  30   a  and  30   a  are formed on an upper surface of the receiving member  30 . Each groove  30   a  has a shape suitable for the shape of the connecting member  16 , and the grooves  30   a  and  30   a  are formed at a distance when the connecting members  16  and  16  are arranged on the outer fabric  12  and the inner fabric  14 . The receiving member  30  is placed on a press stand  35 . 
     Required number of connecting members  16  and  16  are respectively placed in the grooves  30   a  with the outer surface  16   a  facing upward. At this time, the outer surface  16   a  of the connecting member  16  protrudes upward from the upper surface of the receiving member  30 . That is, a depth of the groove  30   a  of the receiving member  30  is less than the width h of the connecting member  16  in the height direction. 
     As illustrated in  FIG.  7   , since release papers  32   a  and  32   b  are respectively attached to the outer surface  16   a  and the inner surface  16   b  of the connecting member  16 , first, the release paper  32   a  adhering to the outer surface  16   a  is removed. Thus, an adhesive  34   a  adhering to the outer surface  16   a  of the connecting member  16  is exposed. Note that an operation of removing the release paper  32   a  on the outer surface  16   a  may be performed before the connecting member  16  is disposed in the groove  30   a.    
     Next, as illustrated in  FIG.  8   , the outer fabric  12  is placed on the connecting members  16  placed in the grooves  30   a,  and the outer fabric  12  is pressed from above by a pressing machine to bond the outer fabric  12  to the connecting members  16  and  16 . At this time, depending on the type of the adhesive  34   a,  pressing is performed while heating. That is, a large number of connecting members  16  and  16  are collectively bonded to the outer fabric  12 . 
     When the connecting members  16  and  16  are bonded to the outer fabric  12 , the connecting members  16  and  16  bonded to the outer fabric  12  are removed from the receiving member  30 , and the outer fabric  12  is placed on the press stand  35  with the connecting members  16  and  16  positioning above the outer fabric  12 . In this state, the release paper  32   b  attached to the inner surface  16   b  of the connecting member  16  is removed to expose the adhesive  34   b,  and in this state, as illustrated in  FIG.  9   , the inner fabric  14  is placed from above in alignment with a position of the outer fabric  12 . At this time, although the filler  18  is not yet disposed in the space  20 , even in this state, each connecting member  16  is not deformed so that the distance between the outer surface  16   a  and the inner surface  16   b  is reduced by the weight of the outer fabric  12  or the inner fabric  14 . On the other hand, the outer fabric  12  or the inner fabric  14  bends due to its own weight so that the space  20  is recessed. 
     Then, the inner fabric  14  is pressed from above by the pressing machine to bond the inner fabric  14  to the connecting members  16  and  16 . At this time, depending on the type of the adhesive  34   b,  pressing is performed while heating. That is, a large number of connecting members  16  and  16  are collectively bonded to the inner fabric  14 . At this time, the connecting members  16  and  16  are deformed such that the outer fabric  12  and the inner fabric  14  approach each other by a pressing force by the pressing machine, but when the pressing force by the pressing machine is released, the connecting members  16  and  16  are restored to a shape before being pressed. Therefore, it is not necessary to deform the connecting member  16  so as to increase the distance between the outer surface  16   a  and the inner surface  16   b.    
     In this regard, as in the conventional art illustrated in  FIGS.  12  and  13   , when the strip member  80  bent in a U shape is used, and a large number of strip members  80  are to be simultaneously bonded to the first fabric  81  or the second fabric  82  by using the pressing machine, the strip member  80  is creased and maintained in a U-shaped bent state. Therefore, the distance between the first fabric  81  and the second fabric  82  is almost eliminated. Therefore, an operation of increasing the distance between the first fabric  81  and the second fabric  82  is required. On the other hand, in order to prevent the strip member  80  from being creased, it is necessary to bond the strip members  80  to the first fabric  81  or the second fabric  82  one by one, which increases the number of steps for forming the space. 
     On the other hand, even if the connecting member  16  of the present embodiment is pressed when the connecting member  16  is bonded to the outer fabric  12  and the inner fabric  14 , the connecting member  16  is then restored to a state of not being crushed by the weight of the outer fabric  12  or the inner fabric  14 . Therefore, a large number of connecting members  16  can be bonded to the outer fabric  12  and the inner fabric  14  using the pressing machine. 
     Finally, the filler  18  is inserted into space  20  between outer fabric  12  and inner fabric  14 . Thus, the cold protection material  10  is completed. 
     As described above, in the cold protection material  10  according to the present embodiment, in a state in which the filler  18  is not stored in the space  20  between the outer fabric  12  and the inner fabric  14 . and the outer fabric  12  or the inner fabric  14  is placed on the two connecting members  16  and  16 , the two connecting members  16  and  16  are not deformed so as to reduce the distance between the outer surface  16   a  and the inner surface  16   b  of the connecting members  16  and  16 . That is, the shape of the two connecting members  16  and  16  when the filler  18  is not stored in the space  20  between the outer fabric  12  and the inner fabric  14  is maintained to be substantially the same as a shape when the filler  18  is stored in the space  20 . Therefore, the distance between the outer fabric  12  and the inner fabric  14  in the vicinity of the connecting member  16  is secured at a height of the connecting members  16  and  16 . Therefore, when filling the filler  18  into the space  20  between the outer fabric  12  and the inner fabric  14 , an operation of deforming the shape of the connecting members  16  and  16  is not necessary. On the other hand, since the connecting members  16  and  16  are formed of a flexible material, when the cold protection material  10  is used for the cold proof garment, a situation hardly occurs in which a silhouette of the cold proof garment is impaired by the presence of the connecting members  16  and  16 . In addition, since the connecting members  16  and  16  have air permeability, the air is allowed to enter and exit the space  20  in which the filler  18  is stored. 
     In the cold protection material  10 , the ventilation layer  26  ensures that the air enters and exits the space  20  between the two connecting members  16  and  16 . Further, since the connecting members  16  and  16  are bonded to the outer fabric  12  by the front fabric  24 , an adhesive force between the connecting members  16  and  16  and the outer fabric  12  is secured. Furthermore, since the connecting members  16  and  16  are bonded to the inner fabric  14  by the back fabric  25 , an adhesive force between the connecting members  16  and  16  and the inner fabric  14  is secured. 
     Further, since the ventilation layer  26  is made of a knitted fabric, the connecting members  16  and  16  easily ensure air permeability. Note that the knitted fabric constituting the ventilation layer  26  may be a warp knitted fabric or a tubular knitted fabric. 
     Further, since the knitted fabric is knitted into the front fabric  24  and the back fabric  25 , peel strength between the front fabric  24  and the ventilation layer  26  is increased, and peel strength between the ventilation layer  26  and the back fabric  25  is also increased. As a result, connection strength between the outer fabric  12  and the inner fabric  14  is ensured. 
     Further, since each connecting member  16  is made of a double raschel knitted fabric, it is possible to ensure that the air enters and exits the space  20  through the connecting members  16  and  16 . Moreover, since a bonding strength between the connecting members  16  and  16  and the outer fabric  12  and a bonding strength between the connecting members  16  and  16  and the inner fabric  14  can be ensured, a bonding strength between the outer fabric  12  and the inner fabric  14  can be ensured. 
     Further, since each connecting member  16  has the width w in the lateral direction of 1 time or more and 5 times or less the width h in the height direction, even when the connecting member  16  is bonded to the outer fabric  12  and the inner fabric  14  by pressing, it is possible to suppress folding of the connecting member  16 . Furthermore, since the width w in the lateral direction of the connecting member  16  is 3 mm or more and 15 mm or less, a bonding area between each connecting member  16  and the outer fabric  12  and the inner fabric  14  can be secured. 
     It should be understood that the embodiment disclosed herein is illustrative in all respects and is not restrictive. The present invention is not limited to the embodiment, and various modifications, improvements, and the like can be made without departing from the gist of the present invention. For example, the cold protection material  10  may be made of a double face instead of the double raschel knitted fabric. The double face is a fabric obtained by seaming or bonding two fabrics to each other. In this case, at least one fabric is made of a fabric having good air permeability. The double face may be a double weave in which two fabrics are partially sewn together, or may be a structure in which two fabrics are bonded together with an adhesive such as a polyurethane resin adhesive. 
     Although the receiving member  30  is used to manufacture the cold protection material  10  of the embodiment, the present embodiment is not limited thereto. For example, if the plurality of connecting members  16  and  16  can be arranged side by side at predetermined positions on the press stand  35  by providing a mark or the like, the receiving member  30  need not be used. 
     In the embodiment, the large number of connecting members  16  and  16  are collectively bonded to the outer fabric  12 , but instead of this, the large number of connecting members  16  and  16  may be bonded to the outer fabric  12  one by one. The same applies to a method of bonding the large number of connecting members  16  and  16  to the inner fabric  14 . 
     Here, the embodiment will be outlined. 
     (1) The cold protection material according to the embodiment is a cold protection material used for a cold proof garment, including: an outer fabric constituting a front fabric of the cold proof garment or constituting a fabric disposed on a back side of the front fabric; an inner fabric disposed inside the outer fabric; two connecting members bonded to the outer fabric and the inner fabric to form a space between the outer fabric and the inner fabric; and a filler stored in the space. Each of the two connecting members has an outer surface bonded to the outer fabric and an inner surface bonded to the inner fabric, and has air permeability. Each of the two connecting members is formed of a flexible material, and is soft enough not to be deformed to reduce a distance between the outer surface and the inner surface by a weight of the outer fabric or the inner fabric. 
     In the cold protection material according to the embodiment, in a state in which the filler is not stored in the space between the outer fabric and the inner fabric, and the outer fabric or the inner fabric is placed on the two connecting members, the two connecting members are not deformed so as to reduce the distance between the outer surface and the inner surface of the connecting members. That is, the shape of the two connecting members when the filler is not stored in the space between the outer fabric and the inner fabric is maintained to be substantially the same as the shape when the filler is stored in the space. Therefore, since the distance between the outer fabric and the inner fabric is secured at the height of the connecting member, it is not necessary to deform the shape of the connecting member when filling the space between the outer fabric and the inner fabric with the filler. On the other hand, since the connecting members are formed of a flexible material, when the cold protection material is used for the cold proof garment, the situation hardly occurs in which the silhouette of the cold proof garment is impaired by the presence of the connecting members. In addition, since the two connecting members have air permeability, the air is allowed to enter and exit the space in which the filler is stored. 
     (2) Each of the two connecting members may be deformed by a pressing force of a pressing machine when the two connecting members are bonded to the outer fabric or the inner fabric, and may be configured to be restored to a shape before pressing when the pressing force by the pressing machine is released. In this aspect, even after the outer fabric and the inner fabric are pressed and bonded to the two connecting members using the pressing machine, the connecting members are not maintained in a deformed state so as to reduce the distance between the outer surface and the inner surface of the connecting member. Therefore, it is not necessary to deform the shape of the connecting member after pressing. 
     (3) Each of the two connecting members may include a front fabric forming the outer surface, a back fabric forming the inner surface, and a ventilation layer between the front fabric and the back fabric. In this aspect, the ventilation layer ensures that the air enters and exits the space between the two connecting members. Further, since the connecting member is bonded to the outer fabric by the front fabric, the adhesive force between the connecting member and the outer fabric is secured. Furthermore, since the connecting member is bonded to the inner fabric by the back fabric, the adhesive force between the connecting member and the inner fabric is secured. 
     (4) The ventilation layer may be made of a knitted fabric, a woven fabric, or a nonwoven fabric. When the ventilation layer is made of a knitted fabric or a nonwoven fabric, the connecting member easily ensures air permeability. On the other hand, when the ventilation layer is formed of a woven fabric, the woven fabric is preferably rougher than the front fabric and the back fabric. 
     (5) The knitted fabric may be knitted into the front fabric and the back fabric. In this aspect, the peel strength between the front fabric and the ventilation layer is increased, and the peel strength between the ventilation layer and the back fabric is also increased. As a result, the connection strength between the outer fabric and the inner fabric is ensured. 
     (6) The ventilation layer may be made of a foam. In this aspect, it is ensured that the air enters and exits the space through the connecting member. Note that the foam may be directly bonded to the front fabric and the back fabric, but the laminate layers may be respectively bonded to the front surface and the back surface of the foam, the front fabric may be bonded to the laminate layer on the front side, and the back fabric may be bonded to the laminate layer on the back side. 
     (7) Each of said two connecting members may be made of a double raschel knitted fabric. In this aspect, it is ensured that the air enters and exits the space through the connecting member. Moreover, since the bonding strength between the connecting member and the outer fabric and the bonding strength between the connecting member and the inner fabric can be ensured, the bonding strength between the outer fabric and the inner fabric can be ensured. 
     (8) Each of the two connecting members may be made of a foam. In this aspect, it is ensured that the air enters and exits the space through the connecting member. 
     (9) Each of the two connecting members may have a width in a lateral direction of 1 time or more and 5 times or less a width in a height direction, and the width in the lateral direction of 3 mm or more and 15 mm or less. In this aspect, since the width w in the lateral direction is 1 time or more and 5 times or less the width in the height direction, even when the connecting member is bonded to the outer fabric and the inner fabric by pressing, it is possible to suppress folding of the connecting member. Further, since the width of the connecting member in the lateral direction is 3 mm or more and 15 mm or less, the bonding area between the connecting member and the outer fabric and the inner fabric can be secured. 
     (10) A method for manufacturing the cold protection material includes: placing two connecting members respectively at predetermined positions with an outer surface or an inner surface facing upward; placing one of an outer fabric and an inner fabric on the two connecting members placed at the predetermined positions; pressing the one of the outer fabric and the inner fabric from above to bond the one of the outer fabric and the inner fabric to the two connecting members; placing the one of the outer fabric and the inner fabric to which the two connecting members are bonded is placed on a press stand such that the two connecting members face up; bonding the other of the outer fabric and the inner fabric to the two connecting members bonded to the one of the outer fabric and the inner fabric; and inserting a filler into a space between the two connecting members that is the space between the outer fabric and the inner fabric. 
     (11) The method for manufacturing the cold protection material may include: preparing a receiving member in which at least two grooves are formed on an upper surface of the receiving member; placing the two connecting members respectively in the two grooves with the outer surface or the inner surface facing upward; and placing the one of the outer fabric and the inner fabric on the two connecting members placed in the two grooves, and pressing the one of the outer fabric and the inner fabric from above to bond the one of the outer fabric and the inner fabric to the two connecting members.