I UU I OoL4 Description Title of Invention: PACKING BAG FOR TRANSPORTATION OF A SPECIMEN Technical Field [00011 The present invention relates to a packing bag for transportation of a specimen, which may be used for transporting articles such as a container containing liquid, and food containing an exudative fluid. Background Art [00021 In a case of transporting a container containing liquid, the liquid may spill out due to a breakage of the container, looseness of a cap, or the like, which may stain other articles of transport. Conventionally, in order to prevent this problem, the container is covered with an absorbing material for absorbing the spilled liquid, and the covered container is put into a packing bag. Then, double packing is performed by putting the container into another packing bag, or the container is put into, instead of the another packing bag, a tough container capable of preventing a breakage. The manufacture of such a packing bag inevitably requires much time and high cost, and hence there has been an expectation for simplification of the packing bag. [0003] In order to meet this expectation, the following envelope is proposed (for example, see Patent Literature 1) . Specifically, the envelope includes a packing bag and a liquid absorbent. The 1 packing bag is formed of a laminated body obtained by laminating a film layer on at least one surface of a sheet-like base material, and is fabricated so as to prevent a leakage of liquid. The liquid absorbent is provided inside the packing bag. [0004] However, regarding the envelope proposed here, the packing bag is formed of the laminated body including the sheet-like base material and the film layer, and the packing bag and the liquid absorbent are formed in totally separate processes respectively. Then, the liquid absorbent is provided inside the packing bag. Therefore, manufacture of the envelope requires muchtime andeffort, and hence the envelope is not necessarily satisfactory in terms of cost. [0005] In recent years, frequency of transporting a specimen for medical examination is increased, and hence a container containing the specimen is transported with increasing frequency. The transportation of the container requires that the container be sealed in a packing bag which is fabricated so as to prevent a leakage of liquid, but the envelope as proposed above is disadvantageous in terms of cost. Accordingly, there is a problem of more inexpensive packing bag. [0006] For example, for the purpose of preventing a leakage, the following packing bag is proposed to achieve this purpose. Specifically, the packing bag is made of a synthetic resin, and includes bottom and both sides and a sealing part which is made for an opening. Examples of packing materials for the packing bag 2 include a synthetic resin film made of polyethylene, polyethylene terephthalate (PET), nylon, or polypropylene, a combination of the resins, or a combination of the resins and an aluminum foil. The packing bag is provided with an absorbing material for absorbing all the liquid spilled out in a body. Thus, the packing bag is completed. [0007] It is preferred to use, as the absorbing material provided in the body, a water-absorbing (hydrophilic) material formed of a fibrous structure, such as paper, nonwoven fabric, or membrane filter. Inaddition, inacase where the absorbingmaterial is fixedonan inner surface of thepackingbag, the absorbingmaterial does not slide within the bag when the container is put into/taken out of the packing bag, and hence the container is easily put into/taken out of the packing bag, which is preferred. In order to fix the absorbing material to be furnished in the body, when packing materials each formed of the synthetic resin film are laminated one on top of another to form a bag, the absorbing material may be sandwiched between the packing materials, and then peripheral portions sandwiching the absorbing material may be heat-sealed. This facilitates manufacture, and hence a reduction in cost can be achieved. [0008] However, the absorbing material, which is sandwiched between the packing materials each formed of the synthetic resin film, is fixed while keeping pores of fibers at the heat-sealed parts. The pores of fibers easily allow penetration of liquid due 3 to a capillarity action, and hence when liquid leaks in the body, the liquid absorbed by the absorbing material seeps through the above-mentioned pores of fibers at the heat-sealed parts out of the body. As a result, the packing bag is inadequate to prevent a leakage of liquid. [0009] In a case where the fibrous structure made of a thermoplastic resin is used as the absorbing material, when the packing materials each formed of the synthetic resin film are heat-sealed together, the fibrous structure of the absorbing material is fused to break, and hence the capillarity action does not occur at the heat-sealed parts. Accordingly, the liquid contained in the body does not seep out. However, the fibrous structure made of the thermoplastic resin hardly absorbs liquid, and hence is inadequate as the absorbing material. [0010] Further, the fibrous structure obtained by mixing thermoplastic resin powder in pulp may be used as the absorbing material. However, in a case where a content of the thermoplastic resin powder is low, when the packing materials each formed of the synthetic resin film are heat-sealed together, the pores of fibers of the fibrous structure of the absorbing material are not completely filledwith the fused thermoplastic resin, and the capillarityaction occurs at the heat-sealed parts, with the result that the liquid contained in the body seeps out. Further, when the content of the thermoplastic resinpowder is high, the pores of fibers of the fibrous structure of the absorbing material are completely filled with the 4 1VU-140(U(4 fused thermoplastic resin, and the capillarity action does not occur at the heat-sealed parts, with the result that the liquid contained in the body does not seep out. However, the pores of fibers of the fibrous structure of the absorbing material are filled with the thermoplastic resin powder, and hence the pores of fibers of the fibrous structure are reduced, which causes a problem in that an amount of absorbed liquid is reduced. [0011] For the purpose of solving this problem, there may be proposed a packing bag in which packing materials each formed of a synthetic resin film are slightly larger in dimension than an absorbing material to be internally provided, and thus the absorbing material is not present at outermost portions of heat sealed parts. However, this packing bag requires much time and effort for positioning the absorbing material. Accordingly, this packing bag is inadequate for mass production, and needs high cost. [0011a] Reference to any prior art in the specification is not an acknowledgment or suggestion that this prior art forms part of the common general knowledge in any jurisdiction or that this prior art could reasonably be expected to be understood, regarded as relevant, and/or combined with other pieces of prior art by a person skilled in the art. Citation List Patent Literature [0012] [PTL 1] JP 2001-247134 A Summary of Invention Technical Problems [00131 Therefore, in order to solve the above-mentioned problems, as a result of intensive studies, inventors of the present invention have succeeded to cause fibrous structure of 5 1UU|000U04 an absorbing material to disappear when the absorbing material is sandwiched between synthetic resin films and then heat sealed, and have completed a packing bag for transportation capable of preventing a leakage of liquid even when the absorbing material having a high water-absorbing property is sandwiched between entire surfaces to be heat-sealed. [00141 It is an object of the present invention to provide a packing bag for transportation, which is convenient for transportation of articles such as a container containing liquid, and food containing an exudative fluid, capable of preventing liquid from leaking out of a body, capable of keeping a humidity so as to prevent the articles in the body from drying up, and capable of achieving a reduction in cost. Solution to Problems [0015] According to a first aspect of the invention, there is provided a packing bag for transportation of a specimen including: a body having an opening; and an openable and closable sealing part for sealing the opening, the body including: two packing material sheets each formed of a thermoplastic synthetic resin film; and an absorbing material sandwiched between the two packing material sheets and formed in such a manner that a thermoplastic synthetic resin having a hydrophilic group selected from among an amide group, a sulfone group, and a carboxyl group for imparting a water-absorbing property is drawn into a fibrous form and then woven into cloth, wherein sides of the two packing material sheets sandwiching the absorbing material at the portions excluding the opening are heat-sealed into a state in which a gap between each of the two packing material sheets and the absorbing material and pores of fibers of the absorbing material are filled, and into a sealed state in which penetration of liquid through the fibers of the absorbing material is prevented. 6 I UU IOUOZ [00161 The next paragraph is paragraph [00171. [0017] According to a further feature of the invention, a synthetic resin to be drawn into the fibrous form includes a synthetic resin having a hydrophilic group. [00181 According to a further feature of the invention, the openable and closable sealing part for sealing the opening of the body includes a slide zipper or a seal zipper. [0019] According to a further feature of the invention, the thermoplastic synthetic resin film forming each of the two packing material sheets is transparent. [0020] In a second aspect of the invention there is provided a packing bag for transportation of a container containing a specimen, the packing bag comprising: a body having an opening; and an openable and closable sealing part for sealing the opening, wherein the body comprises: two packing material sheets each formed of a thermoplastic synthetic resin film; and an absorbing material sandwiched between the two packing material sheets, the absorbing material including a cloth and a synthetic fiber which is drawn into a fibrous form and subjected to hydrophilic treatment and then woven into the cloth, wherein the sides of the two packing material sheets sandwich the absorbing material, wherein the absorbing material is heat-sealed together with the sides of the two packing material sheets which sandwich the absorbing material, and wherein the heat-seal including the absorbing material is disposed at a distal end of the two packing material sheets constituting an edge of the packing bag. [0020a] As used herein, except where the context requires otherwise the term 'comprise' and variations of the term, such as 'comprising', 'comprises' and 'comprised', are not intended to exclude other additives, components, integers or steps. Advantageous Effects of Invention 7 [0021] The packing bag for transportation of a specimen includes: the body having the opening; and the openable and closable sealing part for sealing the opening, the body including: the two packing material sheets each formed of the thermoplastic synthetic resin film; and the absorbing material sandwiched between the two packing material sheets, the sides sandwiching the absorbing material, which are heat-sealed at the portions excluding the opening. Accordingly, when heat-sealing sides of the two packing material sheets which sandwich the absorbing material therebetween, the synthetic fiber forming the absorbing material is fused to fill pores of fibers, to thereby be welded to the packing material sheets. As a result, heat sealed parts are sealed so as to prevent penetration of liquid. In a case where liquid leaks in the body, the liquid absorbed by the absorbing material does not seep through the heat-sealed parts out of the body. 8 I UU1 ZO IU(4 [00221 According to a further feature of the invention, the synthetic resin drawn into the fibrous form includes a synthetic resin having a hydrophilic group, and hence the synthetic resin more effectively attracts the liquid leaking in the body, with the result that the liquid can be absorbed and kept in the pores of fibers of the absorbing material. [0023] According to a further feature of the invention, the sealing part for sealing the opening of the body includes a slide zipper or a seal zipper, and hence operations of opening and sealing are facilitated. As a result, when opening the opening of the packing bag, dangerous tools such as scissors and a knife are not needed. [0024] According to a further feature of the invention, the thermoplastic synthetic resin film forming each of the packing material sheets is transparent, and hence a state of an object contained in the body can be recognized from an outside of the body. In a state in which the body is still sealed, for example, a label or a bar code attached to the object contained in the body can be recognized from the outside of the body. Brief Description of Drawings [0025] [FIG. 11 A perspective view illustrating a packing bag 9 for transportation according to an exemplary embodiment of the present invention. [FIG. 2] An exploded perspective view illustrating the packing bag for transportation of FIG. 1. [FIG. 3] A longitudinal sectional view illustrating an open state of the packing bag for transportation of FIG. 1. [FIG. 4] A lateral sectional view taken along the line A-A of FIG. 1. Description of Embodiment [0026] A packing bag for transportation according to an exemplary embodiment of the present invention is described in detail with reference to the drawings. FIGS. 1 to 3 illustrate the packing bag for transportation according to the exemplary embodiment of the present invention. FIG. 1 is a perspective view illustrating the packing bag for transportation according to the present invention. FIG. 2 is an exploded perspective view illustrating the packing bag for transportation of FIG. 1. FIG. 3 is a longitudinal sectional view illustrating an open state of the packing bag for transportation of FIG. 1. FIG. 4 is a lateral sectional view taken along the line A-A of FIG. 1. [0027] The packing bag for transportation according to the embodiment of the present invention includes an openable and closable sealing part 3 provided to an opening 2 of a body 1 which has three 10 heat-sealed sides and a quadrangular shape. The above-mentioned body 1 has such a configuration that an absorbing material 6 is sandwiched between two packing material sheets 4, 5 each formed of a thermoplastic synthetic resin film, and that sides 7 sandwiching the absorbing material 6 are heat-sealed together at portions excluding the opening 2. [00281 As the above-mentioned thermoplastic synthetic resin film forming each of the packing material sheets 4, 5, a transparent synthetic resin film is used in the embodiment of the present invention. The synthetic resin film is made of polyethylene or polypropylene. [00291 Further, the absorbing material 6 sandwiched between the two packing material sheets 4, 5 may be obtained in such a manner that a synthetic fiber drawn into a fibrous form is subjected to hydrophilic treatment and then woven into cloth. According to this embodiment, the above-mentioned synthetic fiber subjected to the hydrophilic treatment is obtained in such a manner that a thermoplastic resin subjected to the hydrophilic treatment is laminated on a surface of the synthetic fiber. Further, a synthetic resin to be drawn intothe fibrous form is not particularly limited, but is preferred to be a synthetic resin having a hydrophilic group, for example, plastics having a hydrophilic group such as an amide group, a sulfone group, or a carboxyl group on a surface thereof. [00301 The absorbing material 6 is formed into the same shape as those of the packing material sheets 4, 5, but has a longitudinal 11 (vertical in the drawing sheet) length smaller than those of the packing material sheets 4, 5. When lining up bottom sides and both sidelong sides of all the packing material sheets 4, 5 and the absorbing material 6, the absorbing material 6 has such a length that an upper side of the absorbing material 6 does not overlap the sealing part 3 provided at upper sides of the packing material sheets 4, 5. [0031] Further, the sealing part 3 provided to the opening 2 of the body 1 is not particularly limited as long as the sealing part 3 can hermetically seal the opening 6, but it is preferred that the sealing part 3 include a slide zipper or a seal zipper. According to the embodiment of the present invention, the sealing part 3 includes a groove for a slide zipper or seal zipper 3a provided in an upper side of one of the packing material sheets 4, 5, and a protruded streak part 3b provided on an upper side of the other of the packing material sheets 4, 5 so as to be fast fitted in the groove for a slide zipper or seal zipper 3a. [0032] The above-mentioned body 1 has such a configuration that the absorbing material 6 is sandwiched between the two packing material sheets 4, 5 each formed of the thermoplastic synthetic resin film, and that the sides 7 sandwiching the absorbing material 6 are heat-sealed together at the portions excluding the opening 2. According to theembodimentof the present invention, in addition to the above-mentioned configuration, the packing material sheets 4, 5 and the absorbing material 6 are heat-sealed together in a 12 longitudinal direction, to thereby form a partition sealing part 8 substantially at a center portion of the body 1. [0033] The packing bag for transportation thus configured includes the body 1 including: the two packing material sheets 4, 5 each formed of the thermoplastic synthetic resin film; the absorbing material 6 sandwiched between the two packing material sheets 4, 5, the absorbing material 6 being obtained in such a manner that the synthetic fiber drawn into a fibrous form is subjected to the hydrophilic treatment and then woven into cloth; and the sides 7 sandwiching the absorbing material 6, which are heat-sealed together at the portions excluding the opening 3. Accordingly, when heat-sealing sides of the two packing material sheets 4, 5 which sandwich the absorbing material 6 therebetween, the synthetic fiber forming the absorbing material 6 is fused to fill pores of fibers, to thereby be welded to the packing material sheets 4, 5. As a result, heat-sealed parts 9 are sealed so as to prevent penetration of liquid. When liquid leaks in the body 1, the liquid absorbed by the absorbing material 6 does not seep through the heat-sealed parts 9 out of the body 1. [00341 Further, regarding the absorbing material 6, the synthetic fiber drawn into a fibrous form is subjected to the hydrophilic treatment, and hence the absorbing material 6 attracts the liquid leaking in the body 1, with the result that the liquid can be absorbed and kept in the pores of fibers of the absorbing material 6. According to an embodiment 13 the above-mentioned synthetic fiber subjected to the hydrophilic treatment is obtained in such a manner that the thermoplastic resin subjected to the hydrophilic treatment is laminated on the surface of the synthetic fiber, and hence the thermoplastic resin laminated on the surface of the synthetic fiber attracts the liquid leaking in the body 1, with the result that the liquid can be absorbed and kept in the pores of fibers of the absorbing material 6. Further, according to the embodiment of the present invention, a synthetic resin to be drawn into the above-mentioned fibrous form includes a synthetic resin having a hydrophilic group, and hence the synthetic resin more effectively attracts the liquid leaking in the body 1, with the result that the liquid can be absorbed and kept in the pores of fibers of the absorbing material 6. [0035] Further, according to the embodiment of the present invention, the sealing 3 for sealing the opening 2 of the body 1 includes a slide zipper or a seal zipper, and hence operations of opening and sealing the opening 2 of the body 1 are facilitated. As a result, when opening the opening 2 of the body 1, dangerous tools such as scissors and a knife are not needed. Further, according to the embodiment of the present invention, the synthetic resin film forming each of the packing material sheets 4, 5 is transparent, and hence a state of an object contained in the body 1 can be recognized from an outside of the body 1. In a state in which the body 1 is still sealed, for example, a label or a bar code attached to the object contained in the body 1 can 14 be recognized from the outside of the body 1. In addition, according to the embodiment of the present invention, thepackingmaterial sheets 4, 5andtheabsorbingmaterial 6 are heat-sealed together in the longitudinal direction, to thereby form the partition sealing part 8 substantially at the center of the body 1. Accordingly, the absorbing material 6 can be prevented from bulging in the body 1, and in addition, for example, two containers containing liquid can be put into one packing bag separately. Even if the liquid leaks from one of the containers, the other container separated by the partition sealing part 8 is not contaminated. Reference Signs List [0036] 1 body 2 opening 3 sealing part 3a groove for a slide zipper or seal zipper 3b protruded streak part 4, 5 packing material 6 absorbing material 7 side 8 partition 9 heat-sealed part 15