JP2006317416A - Sample keeping sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sample keeping bag excellent in printing appearance and printing durability, not causing the contamination on its printing surface due to the impregnation of the liquid component contained in a sample, preventing the slip-down of the sample at the time of sampling, simple in its constitution and its manufacturing method, easily opened at the time of insertion of the sample, enhanced in the easiness of sampling work and suitable for a traceability system. <P>SOLUTION: The sample keeping bag is constituted by superposing sheets 1 based on polyolefin one upon another and has a sheetlike form. The definite section in the outer peripheral edges of the superposed sheets 1 becomes the opening part 2 of the bag and the superposed sheets 1 are mutually connected in the outer peripheral edges other than the outer peripheral edges of the superposed sheets 1 to constitute the bag having the sheetlike form. The mutual connection of the sheets 1 at least in one of the side edge parts 3a and 3b holding the opening part 2 is achieved by the folding-back of the sheets 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sample storage bag that can be used in a traceability system.

  In order to manage the safety and quality of food, a system capable of tracking the history of food production, distribution, etc., a so-called traceability system is used. As a traceability system used for measures against mad cow disease, meat samples are stored with the identification number of the origin animal before distribution of beef, and the identity is confirmed afterwards using the samples for verification of DNA testing. Thus, a system that can track the history of beef production, distribution, etc. is exemplified.

  As a sample holder for storing a piece of meat sample, in Patent Document 1, a cover sheet made of a transparent polypropylene film is fixed on a base sheet made of paper by a hinge operation, and the surface of the cover sheet facing the base sheet A structure in which a backing sheet is detachably fixed via an adhesive is disclosed. In use, the sample holder peels off the backing sheet of the cover sheet to expose the adhesive, and adheres the cover sheet onto the base sheet on which the sample is placed to confine the sample. The sample holder is printed with a barcode or the like for identifying the sample on the surface of the base sheet opposite to the surface on which the sample is placed.

However, the sample holder described in Patent Document 1 has a problem that a printing appearance is poor because a basic sheet for printing a barcode or the like is paper, and printing is performed by rubbing the printing surface when printing with wax-based ink on paper. There is a problem that information is lost and printing durability is poor, and in the case of samples containing liquid components such as meat juice and blood such as meat sample, placing the sample on the base sheet that is paper is the opposite of the base sheet There is a problem that the liquid surface is impregnated on the printing surface, which is a surface, the appearance is poor, and the printing information is difficult to read. In addition, since the sample holder described in Patent Document 1 places the sample on a non-adhesive base sheet, the sample is slippery, and it is difficult to hold the sample on the base sheet until the cover sheet is adhered and the sample is confined. There is a problem that sampling is difficult. Furthermore, the sample holder described in Patent Document 1 has a problem in that the configuration and the manufacturing method are complicated and the cost is high.
In order to solve the above-described conventional problems, the present inventors have proposed a bag-shaped sample storage sheet having a specific structure using a sheet mainly composed of polyolefin (Japanese Patent Application No. 2003-431584). No., Japanese Patent Application No. 2003-431587).
The inventors of the present invention have focused on facilitating opening of the bag when inserting a sample in order to further improve the ease of sampling work.
Special table 2003-508770 gazette

  The present invention is a sample storage bag that can be used in a traceability system, which improves the above-described conventional problems, and particularly facilitates opening of the bag when a sample is inserted. The purpose is to provide a sample storage bag with improved performance.

As a result of intensive studies to achieve the above object, the present inventors have adopted the following configuration.
That is, the present invention is as follows.
[1] A sample storage bag having a sheet shape composed of overlapping sheets mainly composed of polyolefin,
A certain section of the outer peripheral edge of the overlapping sheets is an opening of the bag, and the other outer peripheral edges are in a state where the overlapping sheets are connected to each other, thereby forming a bag having a sheet shape. Has been
A sample storage bag, wherein the sheets are connected to each other at least one of the side edges sandwiching the opening by folding the sheets.
[2] The sample storage bag according to the above [1], wherein the outer periphery of the sample storage bag is a square and one side thereof is an opening.
[3] On one of the side edges sandwiching the opening, mutual connection between the sheets is achieved by folding the sheets,
The sample storage bag according to [1] or [2], wherein the sheets are connected to each other at the other outer peripheral edge by bonding with an adhesive or heat seal.
[4] The sheets are overlapped by folding the sheet mainly composed of polyolefin, and the outer peripheral edge other than the folded side and the side to be the opening is joined by an adhesive or heat seal to form a bag,
Thus, the sample storage bag according to the above [3], wherein the sheets are connected to each other at one of the side edges sandwiching the opening.
[5] The mutual connection between the sheets at both of the side edges sandwiching the opening is achieved by folding the sheets,
The sample storage bag according to [1] or [2], wherein the sheets are connected to each other at an edge facing the opening and serving as a bottom of the bag by bonding with an adhesive or heat seal.
[6] A cylindrical member made of a sheet mainly composed of polyolefin is used, and the cylindrical member is crushed from the side surface of the body so that the sheets overlap each other, and one end of the crushed cylindrical member A bag by bonding with adhesive or heat seal,
Thus, the sample storage bag according to [5], wherein the sheets are connected to each other at both of the side edges sandwiching the opening by folding the sheets.

  ADVANTAGE OF THE INVENTION According to this invention, the opening of the bag at the time of inserting a sample is easy, As a result, the sample storage bag which can be used for the traceability system which improved the ease of sampling operation can be provided. In addition, the sample storage bag of the present invention is excellent in printing appearance and printing durability of the printing surface, there is no contamination of the printing surface due to impregnation of the liquid component contained in the sample, and the sample slides off the sheet during sampling. There are no shortcomings, and the construction and manufacturing method are simple.

Hereinafter, the present invention will be described in more detail with reference to the drawings.
FIG. 1 is a perspective view showing an example of a sample storage bag according to the present invention.
As shown in FIG. 1, the sample storage bag of the present invention is a sample storage bag having a sheet shape formed by overlapping sheets 1 containing polyolefin as a main component. A certain section of the periphery is the opening 2 of the bag, and the other sheets (the side edges 3a and 3b and the edge 5 serving as the bottom of the bag in FIG. 1) are overlapped with each other. Thus, a bag having a sheet shape is formed, and the sheets 1 are connected to each other at least one of the side edges 3a and 3b sandwiching the opening 2. It is achieved by folding back.
The side edge portion sandwiching the opening portion is a section of the outer peripheral edge of the overlapped sheet, and is a portion located on both sides of the opening portion, such as 3a and 3b in FIG.

In the sample storage bag of the present invention, since the mutual connection of the sheets in at least one of the side edges sandwiching the opening is achieved by the folding of the sheet, the folding of the sheet is about to be restored. When the sample is inserted into the bag at the time of sampling, the opening of the bag is facilitated, and as a result, the sampling operation can be easily performed.
Furthermore, in the sample storage bag of the present invention, since the outer surface of the bag serving as the printing surface is a sheet mainly composed of polyolefin, there is a problem that printing appearance and printing durability due to the use of conventional paper are poor, and The problem that the printing surface due to the impregnation of the liquid component contained in the sample is contaminated can be solved, and furthermore, since it is in a bag shape, the sampling operation can be easily performed without slipping down until the sample is confined.

  “The sheet composed mainly of polyolefin is overlapped” means that the sheet is composed of overlapping sheets composed mainly of polyolefin so that the sample storage bag has a sheet shape. In the present invention, in order to make the sheets mainly composed of polyolefin overlap, one sheet 1 is folded as shown in FIG. 1 or two sheets are overlapped (not shown). Achieved. When two sheets are overlapped, the sheets may be joined together so that at least one side edge is folded. Moreover, it is good also as a state which the sheet | seat overlapped by using the cylindrical member which consists of a sheet | seat which has polyolefin as a main component, and crushing this cylindrical member from the fuselage side surface direction.

  In the present invention, a predetermined section of the outer peripheral edge of the sheet mainly composed of overlapping polyolefins is defined as a bag opening for inserting a sample. For example, when the outer periphery shape of the sample storage bag is a square shape, an aspect in which one side is an opening can be mentioned.

  “The state in which the overlapped sheets are connected to each other” is not limited to the joining process of integrating the two sheets, but for example, 3b in FIG. Also includes state.

Specifically as a sample storage bag of the present invention, the sample storage bag of the following 1st and 2nd modes is illustrated.
The sample storage bag according to the first aspect of the present invention, as shown in FIG. 1 as an example of the configuration, is one of the side edges 3a and 3b sandwiching the opening 2 (the side edge 3b in FIG. 1). Then, the mutual connection between the sheets 1 is achieved by the folding back of the sheets 1, and the other outer peripheral edges (the side edge 3 a and the edge 5 serving as the bottom of the bag in FIG. 1) Are connected by an adhesive or a heat seal (joint portion 4 in FIG. 1).

  In the sample storage bag of the second aspect of the present invention, as shown in an example of the configuration in FIG. 2, the mutual connection between the sheets 1 in both of the side edges 3a and 3b sandwiching the opening 2 is This is achieved by folding the sheet 1, and at the edge 5 that faces the opening 2 and becomes the bottom of the bag, the sheets 1 are connected to each other by bonding with an adhesive or heat sealing (bonding part 4 in FIG. 2). ) Is achieved.

The sample storage bag according to the first aspect of the present invention has, as shown in FIG. 1, for example, folded sheets 1 made of polyolefin as a main component so that the sheets 1 overlap each other, and the folded sides (in FIG. 1) , Side edge 3b) and outer peripheral edge (side edge 3a in FIG. 1 and edge 5 serving as the bottom of the bag in FIG. 1) other than the side to be the opening 2 are joined by adhesive or heat sealing (joining in FIG. 1) Part 4) can be produced as a bag, whereby the sheets 1 are connected to each other at one of the side edges 3a, 3b (side edge 3b in FIG. 1) sandwiching the opening 2. Can be achieved by folding the sheet 1.
The sample storage bag according to the second aspect of the present invention uses, for example, a cylindrical member made of a sheet mainly composed of polyolefin, as shown in FIG. 2, and the cylindrical member is crushed from the side of the body side. Then, one end of the crushed cylindrical member (the edge 5 serving as the bottom of the bag in FIG. 2) is joined with an adhesive or heat seal (joint 4 in FIG. 2). ) So that the sheets 1 can be connected to each other at both of the side edges 3 a and 3 b sandwiching the opening 2 by folding the sheet 1. .
Thus, the sample storage bag of the present invention is advantageous in that the manufacturing method is simpler than before.

In the sample storage bag of the second aspect of the present invention, the tubular member made of a sheet mainly composed of polyolefin may be formed and processed into a seamless tubular shape, and both ends of one sheet may be used. The parts may be joined by an adhesive or heat seal to form a cylinder having a seam 6 as shown in FIG. Further, two or more sheets may be joined together to form a cylinder.
When the cylindrical member is crushed from the side surface of the body and the sheets overlap each other, the position of the seam is not particularly limited.

In the present invention, the joining method is not particularly limited, and examples thereof include joining by an adhesive and joining by heat sealing.
The adhesive used for joining is not particularly limited, and various adhesives can be used. For example, acrylic, epoxy, synthetic rubber, urethane, natural rubber, EVA, melamine, polyamide, etc. These adhesives can be mentioned. Of these, hot-melt adhesives such as EVA adhesives, pressure-sensitive adhesives such as acrylic adhesives and rubber adhesives are preferred.

In the present invention, as the sheet A containing polyolefin as a main component, for example, a polyethylene film, a polypropylene film, and a laminated film thereof (for example, a laminated structure of polyethylene film / adhesive layer / polypropylene film / adhesive layer / polyethylene film) Laminated film comprising at least a polyolefin film such as a laminate of polyethylene film and paper, a laminate of polyethylene film and polyethylene terephthalate film (PET film), a laminate of polyethylene film, PET film and paper, etc. Etc. Among these, a laminated film obtained by laminating a polyethylene film, a PET film, and paper is particularly preferable in terms of strength and workability. In addition, from the viewpoint of transferability of an ink mainly composed of polyolefin described later, a polyethylene film and a laminated film having a polyethylene surface layer (for example, a laminated structure of polyethylene film / adhesive layer / polypropylene film / adhesive layer / polyethylene film) Etc.) are preferred. In the present invention, the thickness of the sheet A is preferably 50 to 200 μm, more preferably 80 to 150 μm. If the thickness of the sheet exceeds 200 μm, the bag becomes unnecessarily bulky or is opened after sealing (sealing). It tends to be staggered. Moreover, when the thickness of the sheet is less than 50 μm, the opening of the bag is difficult to open smoothly or the bag tends to be damaged. The viscosity average molecular weight of the raw material polyolefin is preferably 5,000 to 6,000,000, more preferably 10,000 to 1,500,000. When the viscosity average molecular weight exceeds 6,000,000, it is difficult to form a film, and the fixability of an ink mainly composed of a polyolefin described later tends to be lowered. When the viscosity average molecular weight is less than 5000, the heat resistance and strength of the film itself are insufficient. The sheet A may contain other additives such as a pigment, a reinforcing substrate, an antioxidant, an anti-aging agent and the like as long as the effects of the present invention are not impaired. The content of the additive that may be contained in the sheet A is usually 50 parts by weight or less, preferably 30 parts by weight or less with respect to 100 parts by weight of the polyolefin.
The sheet mainly composed of polyolefin in the present invention may contain other additives such as pigments, reinforcing base materials, antioxidants, anti-aging agents and the like as long as the effects of the present invention are not impaired. The content of the additive that may be contained in the sheet mainly composed of the polyolefin of the present invention is usually 50 parts by weight or less, preferably 30 parts by weight or less with respect to 100 parts by weight of the polyolefin.

  In the present invention, the sheet mainly composed of polyolefin may be a solid sheet or a porous sheet. However, when the sheet is a porous sheet, moisture in the liquid component contained in the sample put in the bag is released to the outside. This is advantageous in that it can. That is, by subjecting the sample storage sheet containing the sample to heat treatment (for example, 50 to 100 ° C., 5 minutes to 24 hours), moisture in the liquid component contained in the sample can be released to the outside through the sheet surface. it can. In the present specification, the “porous sheet” is a sheet having a communication hole penetrating from the front surface to the back surface of the sheet. For example, the air permeability (test method: JIS-P-8117) is 10 to 100, 000 sec / 100 cc is preferable, and 50 to 10,000 sec / 100 cc is more preferable. The viscosity average molecular weight of the polyolefin, which is a raw material for the porous sheet containing polyolefin as a main component, is preferably 5,000 to 6,000,000, and more preferably 10,000 to 2,000,000. Examples of the porous sheet mainly composed of polyolefin in the present invention include porous films mainly composed of polyolefins described in JP-A-63-17941, JP-A-63-295649, etc., and commercially available products. (Breslon, manufactured by Nitto Denko Corporation) and the like.

  In the present invention, the sheet containing polyolefin as a main component is preferably white from the viewpoint of the visibility of print information and the readability of barcodes. The white sheet can be produced, for example, by containing a white pigment (for example, titanium oxide, zinc oxide, natural clay, magnesium carbonate, etc.). Content of a white pigment is 1-50 weight part normally with respect to 100 weight part of polyolefin, Preferably it is 5-30 weight part.

  The sample storage bag of the present invention can be suitably printed on a surface that is an outer surface of a bag of a sheet mainly composed of polyolefin, such as printing of a bar code and a pattern. Since the sample storage bag of the present invention uses a sheet mainly composed of polyolefin on the printing surface, it has excellent printing appearance and printing durability on the printing surface, and there is no contamination of the printing surface due to impregnation of the liquid component contained in the sample. . The ink used for printing is preferably an ink containing polyolefin as a main component from the viewpoint of adhesion to a sheet containing polyolefin as a main component. Examples of the ink mainly containing polyolefin include polyethylene ink and polypropylene ink, and polyethylene ink is preferable from the viewpoint of transferability. In the present invention, the polyolefin-based sheet is a polyethylene film or the surface layer is a laminated film of polyethylene, and the ink used for printing is a polyethylene ink in terms of transferability, adhesion, printing durability, etc. Are particularly preferred.

  The ink mainly composed of polyolefin contains polyolefin and one or more colorants. The viscosity average molecular weight of the raw material polyolefin is usually 5000 to 300,000, preferably 200,000 or less. As the colorant, for example, an appropriate one such as an organic or inorganic pigment, carbon, metal powder or the like can be used. Content of a coloring agent is 50-500 weight part normally with respect to 100 weight part of polyolefin, Preferably it is 100-300 weight part. The ink may contain other additives such as a solvent, an ultraviolet absorber, a dispersant, a surfactant and the like as long as the effects of the present invention are not impaired.

  The polyolefin-based ink can be produced by a method known per se. For example, one or two or more colorants and polyolefin may be heated and mixed with an appropriate kneader such as a roll mill or necessary. Depending on the situation, it can be mixed with a suitable kneader such as a roll mill or a pot mill using a polyolefin-soluble solvent to produce a paste-like fluid.

  Examples of printing on the outer surface of the bag of the sheet mainly composed of polyolefin of the sample storage bag of the present invention include thermal transfer printing, gravure printing, letterpress printing, screen printing, dot impact, etc. Thermal transfer printing is preferable because durability of printing can be obtained by strong thermal fusion between the polyolefin and the polyolefin.

  The present invention may also be a sample storage bag in which the sample storage bags of the present invention are continuously connected and a perforation line is provided between each adjacent sample storage bag. Since the perforation line is provided, at the time of use, each adjacent sample storage bag can be easily separated with a fingertip or the like at the perforation line part. In order to facilitate the separation, it is preferable that the perforation line is provided through the sample storage bag. Further, in order to facilitate separation, a cut may be provided at the end of the perforation line.

  In the present invention, the “sample storage bag” means not only a single sample storage bag, but also a plurality of sample storage bags connected in series between adjacent sample storage bags. Also includes a continuum of sample storage bags provided with perforation lines. In the continuum, a plurality of storage bags are connected before the work of actually storing the sample, so that handling is not complicated. In addition, if the sample is actually stored, the necessary number of storage bags can be obtained by cutting the perforation line between adjacent sample storage bags with a fingertip or the like according to the number of samples. Cutting and storage of samples can be performed. Therefore, it is possible to easily manage completed sample storage products and unused sample storage bags. In addition, it is preferable that the perforation line provided in the said continuous body is provided through the bag for sample storage, and in order to make isolation | separation easy, you may provide a notch in the edge part of a perforation line.

  The external shape of the sample storage bag of the present invention is not particularly limited, and examples thereof include a square (square or rectangular). The size of the sample storage bag of the present invention is not particularly limited as long as the sample can be confined and is suitable for printing on the surface. For example, one side is 20 to 500 mm, preferably one side is 50 to 50 mm. A size of 200 mm is mentioned.

  The sample applied to the sample storage bag of the present invention is not particularly limited, and examples thereof include food samples (for example, beef, pork, poultry, processed products, vegetables, etc.), animal and plant research samples, and the like. The sample storage bag of the present invention can be easily sampled because the bag is easily opened when the sample is inserted, and has excellent printing appearance and printing durability on the printing surface, and is a liquid contained in the sample. There is no contamination of the printing surface due to impregnation of the components, there is no defect that the sample slides off the sheet during sampling, and the construction and manufacturing method are simple, so it is suitable for storing samples as described above in the traceability system Can be used.

  As a sample storage method using the sample storage bag of the present invention, for example, after inserting a sample from the opening of the sample storage bag of the present invention, the opening of the sample storage bag is bonded with an adhesive, heat seal or the like. The method of sealing and storing a sample is mentioned. The sample confined in the sample storage bag can be taken out by breaking the bag or the like when analyzing the sample.

EXAMPLES The present invention will be specifically described below with reference to examples, but these examples do not limit the present invention.
Example 1
As shown in FIG. 1, a sheet made of high-density polyethylene (sheet 1) having a viscosity average molecular weight of 100 μm and about 500,000 is folded so that the sheets 1 overlap each other, and the folded side (the side edge in FIG. 1) 3b) and the outer peripheral edge (side edge 3a and edge 5 serving as the bottom of the bag in FIG. 1) other than the edge serving as the opening 2 are joined by heat sealing to form a bag, and the sample storage bag of the present invention Manufactured.

Example 2
As shown in FIG. 2, a low-density polyethylene film having a thickness of 10 μm and a viscosity average molecular weight of about 100,000 / polyolefin adhesive layer having a thickness of 10 μm / polypropylene film having a thickness of 70 μm / polyolefin adhesive layer having a thickness of 10 μm. / Both opposite ends of a sheet (sheet 1) having a laminated structure of a low density polyethylene film having a viscosity average molecular weight of about 100,000 having a thickness of 10 μm are folded, and the opposite ends of the sheet 1 are overlapped with each other. Then, they are joined together by heat sealing and formed into a cylindrical shape having a seam 6, and the obtained cylindrical member is crushed from the side surface direction of the fuselage so that sheets are overlapped, and one of the crushed cylindrical members is A sample storage bag of the present invention was manufactured by joining the end (the edge 5 in FIG. 2 which is the bottom of the bag) by heat sealing.

FIG. 1 is a perspective view showing an example of a sample storage bag according to the present invention. FIG. 2 is a perspective view showing an example of the sample storage bag of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sheet | seat 2 Opening part 3a Side edge part 3b Side edge part 4 Joining part 5 Edge part used as the bottom of a bag 6 Seam

Claims (6)

A sample storage bag having a sheet shape composed of overlapping sheets of polyolefin as a main component,
A certain section of the outer peripheral edge of the overlapping sheets is an opening of the bag, and the other outer peripheral edges are in a state where the overlapping sheets are connected to each other, thereby forming a bag having a sheet shape. Has been
A sample storage bag, wherein the sheets are connected to each other at least one of the side edges sandwiching the opening by folding the sheets.   The sample storage bag according to claim 1, wherein an outer peripheral shape of the sample storage bag is a square, and one side thereof is an opening. On one of the side edges sandwiching the opening, mutual connection between the sheets is achieved by folding the sheets,
The sample storage bag according to claim 1 or 2, wherein the sheets are connected to each other at the outer peripheral edge by bonding using an adhesive or heat seal. By folding the sheet containing polyolefin as a main component, the sheets are overlapped, and the outer peripheral edge other than the folded side and the side to be the opening is joined by an adhesive or heat seal to form a bag,
4. The sample storage bag according to claim 3, wherein the sheets are connected to each other at one of the side edges sandwiching the opening by folding the sheets. The mutual connection between the sheets at both of the side edges sandwiching the opening is achieved by folding the sheets,
The sample storage bag according to claim 1 or 2, wherein the connection between the sheets is achieved by bonding with an adhesive or heat sealing at an edge that faces the opening and becomes the bottom of the bag. Using a cylindrical member made of a sheet containing polyolefin as a main component, the cylindrical member is crushed from the side of the fuselage so that the sheets overlap each other, and one end of the crushed cylindrical member is adhesive Or make a bag by joining by heat sealing and
The sample storage bag according to claim 5, wherein the sheets are connected to each other at both of the side edges sandwiching the opening by folding the sheets.

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