JP3214290U - Drip sheet for fresh food and tray using it - Google Patents

Abstract

Provided are a drip sheet for fresh food and a tray using the drip sheet, which have a required drip liquid absorption performance and can further improve the appearance of food by a three-dimensional design. A drip sheet has a two-layer sheet structure composed of an upper layer sheet formed from a film having a plurality of apertures and a lower layer sheet formed from a fiber nonwoven fabric containing water-absorbing fibers. The bending rigidity by the KES method is lower than the bending rigidity by the KES method of the lower layer sheet, the arrangement area 20 where the fresh food 2 is arranged, the deformation area 30 which is located alongside the arrangement area in the first direction, the arrangement area and the deformation And a virtual boundary line 18 with the area. The deformation area has at least one sharpened portion 33, the length dimension of the outline of the deformation area is larger than the length dimension of the boundary line 18, and the Klem water absorption of the lower layer sheet is 2.0 to 10 mm. [Selection] Figure 1

Description

  The present invention relates to a drip sheet having liquid absorbency, and more particularly to a drip sheet suitable for absorbing a drip exuded from fresh food such as meat and a tray using the drip sheet.

  2. Description of the Related Art Conventionally, a sheet for absorbing a drip oozing from a fish fillet or beef piece placed in a tray made of polystyrene foam is generally known. For example, Patent Document 1 discloses a drip sheet having a two-layer sheet structure in which an upper layer sheet includes a liquid-permeable thermoplastic film having a plurality of openings, and a lower layer sheet includes a liquid-absorbent fiber nonwoven fabric. Yes.

JP 2002-302182 A

  In the drip sheet disclosed in Patent Document 1, since the upper layer sheet is composed of a liquid-permeable thermoplastic film, the drip oozed from the food changes color by contacting the entire food for a relatively long time. Can be suppressed.

  However, since the entire drip sheet is located on the bottom surface of the tray, the entire sheet is covered in a state where the fresh food is disposed. Therefore, when eating fresh food, there is a risk of accidentally eating in the mouth together with fresh food. Moreover, since it does not have a decorative property as a whole, even if a part of the drip sheet is exposed, a design property that improves the appearance of fresh food cannot be exhibited.

  On the other hand, in order to improve the appearance of a part of the sheet from the fresh food in the tray, for example, the appearance of the food, a drip sheet arranged so as to expose a design portion such as a large leaf shape is also known. In this case, since the whole bottom surface of the fresh food is not covered, there is a possibility that a part of the fresh food directly comes into contact with a sashimi or the like to reduce freshness.

  An object of the present invention is to provide a drip sheet which is an improvement of a conventional drip sheet for fresh food, has a required drip liquid absorption performance, and can further improve the appearance of food by a three-dimensional design. Yes.

  In order to solve the above-mentioned problems, a first device of the present application relates to a drip sheet for fresh food having an upper surface and a lower surface, and a first direction and a second direction intersecting the first direction.

  The first device of the present application is a two-layer sheet structure composed of an upper layer sheet formed from a film having a plurality of apertures and a lower layer sheet formed from a fiber nonwoven fabric containing water-absorbing fibers. The bending stiffness by the KES method is lower than the bending stiffness by the KES method of the lower layer sheet, an arrangement area where the fresh food is arranged, a deformation area located alongside the arrangement area in the first direction, and the arrangement area, An imaginary boundary line with the deformation area, the deformation area having at least one sharpened portion, and an outer shape of the deformation area between opposing edges of the drip sheet facing each other in the second direction. The length dimension of a line is larger than the length dimension of the said boundary line, and the Klem water absorption of the said lower layer sheet | seat is 2.0-10.0 mm, It is characterized by the above-mentioned.

The first device of the present application includes the following preferred embodiments in addition to the above-described features.
(1) In a state where the fresh food is placed on the upper surface, the deformation area is curled by absorbing drip on or in the vicinity of the boundary line.
(2) The upper layer sheet is a thermoplastic synthetic resin film formed from polyethylene, and the lower layer sheet is an airlaid fiber nonwoven fabric containing pulp fibers.
(3) The pulp fibers of the airlaid fiber nonwoven fabric are joined to each other via an adhesive using a styrene elastomer.
(4) The deformation area has a triangular decorative portion having the whole or a part of the boundary line as a base, and the interior angle of the decorative portion is an acute angle.
(5) The outline of the deformation area has at least one inflection point.
(6) The outline of the deformation area has a plurality of protrusions.

  The second device of the present application is directed to a tray for fresh food using a drip sheet.

  A tray according to a second device has a bottom wall on which a drip sheet on which the fresh food is arranged on the upper surface is laid, and a peripheral wall that stands up from an outer peripheral edge of the bottom wall, and a part of the deformation area is It is located on the said surrounding wall, It is characterized by the above-mentioned.

  In one embodiment of the tray according to the second device, the area of the arrangement area of the drip sheet is 70 to 95% of the area of the bottom wall.

  In the drip sheet according to the present invention, the upper layer sheet formed from the perforated film does not directly contact the fresh food with the drip, and can maintain the freshness and prevent discoloration. Moreover, since a deformation area | region curls because a drip is absorbed by the lower layer sheet | seat which consists of a liquid-absorbing fiber nonwoven fabric, a design property improves and the appearance of fresh food improves.

The perspective view which shows the use condition of the drip sheet | seat for fresh food which concerns on this invention. The top view of a drip sheet. Sectional drawing which follows the III-III line | wire of FIG. The side view in the state which mounted the drip sheet | seat on the mounting surface with the smooth surface, mounted fresh food on the upper surface, and left still for 5 minutes. (A) The top view of the drip sheet in an example of an Example. (B) The top view of the drip sheet | seat in an example of another Example. (C) The top view of the drip sheet in an example of other examples. (A) The top view of the drip sheet in an example of another Example. (B) The top view of the drip sheet in an example of other examples. Furthermore, the top view of the drip sheet in an example of another Example.

  The following embodiment relates to the drip sheet 10 shown in FIGS. 1 to 7 and includes not only an indispensable structure of the device but also a selective and preferable structure. In each figure, for convenience of explanation, the upper surface 3 of the drip sheet 10 is lightly colored, and the inner angle of the tip portion of the deformation region 30 is darkly colored. Moreover, in each figure, the line which shows the 1st dimension D1 and the 2nd dimension D2 is shown by the thick line.

  1 and 2, the drip sheet 10 is used by being laid on the bottom wall 1a of the food tray 1 in a state in which fresh food (meat in the illustrated example) 2 is placed. The drip sheet 10 has a longitudinal direction (first or second direction) Y and a short direction (second or first direction) X that intersects the longitudinal direction (first or second direction) X, and is an upper surface 3 on the side where the fresh food 2 is placed. A lower surface 4 in contact with the bottom surface of the tray 1, an upper layer sheet 11 formed from a liquid-permeable resin film, a lower layer sheet 12 formed from a liquid absorbent fiber nonwoven fabric, an upper layer sheet 11 and a lower layer And an intermediate layer 13 that joins the sheet 12. The upper and lower layer sheets 11 and 12 form the upper and lower surfaces 3 and 4 of the drip sheet 10, respectively.

  The food tray 1 is formed of a polystyrene foam, a PET (polyethylene terephthalate) sheet, or the like. The tray 1 includes a bottom wall 1a on which the drip sheet 10 is laid, a peripheral wall 1b that rises in an inclined manner from the outer periphery of the bottom wall 1a, and an outer peripheral flange portion 1c that extends outward from the upper end of the peripheral wall 1b. As the fresh food 2 disposed on the drip sheet 10, a food that exudes a drip mainly composed of water, such as meat, raw fish, or a fresh processed product, is preferably used. Although not shown, in a state where the fresh food 2 is stored in the tray 1, it is packaged with a wrap film and sold at a store such as a retail store or a supermarket.

  1-3, the upper layer sheet 11 penetrates the upper layer sheet 11 from the upper surface 3 toward the lower surface 4 which is regularly or irregularly arranged adjacent to each other in the plane direction (XY direction). A plurality of air-permeable and liquid-permeable openings (liquid introduction portions) 14 are formed. The opening 14 has a circular shape with substantially the same cross-sectional shape. When the fresh food 2 such as meat and vegetables is placed on the upper surface 3 of the drip sheet 10, that is, the upper surface 3 of the upper layer sheet 11, or the entire fresh food 2 is wrapped with the drip sheet 10, the fresh food The drip exuding from 2 moves to the lower layer sheet 12 through the opening 14.

  The opening 14 acts as a liquid conduit that quickly moves the drip to the lower layer sheet 12 and also acts as a vent for imparting air permeability to the contact surface with the fresh food. The openings 14 may have various cross-sectional shapes such as a rectangle and a triangle in addition to a circle, and may have various array patterns such as a wavy shape and a staggered shape as well as a lattice shape and a decorative effect. Therefore, it may be arranged so as to represent a character or a pattern that is visible from the outside.

The upper layer sheet 11 is a liquid-permeable and thermoplastic resin film, for example, a low-density polyethylene having a thickness of 0.3 to 0.35 mm, a mass of 10 to 30 g / m ² , and a density of 0.03 to 0.10 g / cm ^3. It is formed from a polyolefin-based thermoplastic film such as. The hole area ratio of the upper layer sheet 11 is 20 to 60%, and preferably 40 to 50%. When the open area ratio is less than 20%, the drip oozed from the fresh food cannot be quickly transferred to the lower layer sheet 12, while when the open area ratio exceeds 60%, the upper sheet 11 is torn. The strength and rigidity are relatively low, and part of the sheet may be torn during the manufacturing process and during use.

  The aperture ratio is a ratio (%) of the area of the aperture 14 to the surface area of the drip sheet 10 and can be measured by, for example, the following method. The drip sheet 10 is cut into a size of 100 mm × 100 mm to prepare a sample, and the area of the opening 14 as viewed from the upper surface 3 side of the sample using a commercially available microscope (manufactured by Keyence Corporation, Digital Microscope VHS2000). (Area of the upper end portion of the opening 14) is obtained. By multiplying the area of each aperture 14 by the number of apertures in the sample, the aperture area of the sample is calculated. By dividing the aperture area of the sample by the area of the sample, the aperture ratio (%) can be obtained.

  The upper layer sheet 11 is colored green or the like so that the fresh food 2 looks fresh. When the tray 1 is colored in red, blue, or the like in addition to white, the upper layer sheet 11 may be colored in the same color or different color as the tray 1. Moreover, when the design pattern is given to the tray 1, the drip sheet | seat 10 may have a form which recalls the image linked | related with this design pattern.

The lower layer sheet 12 is for absorbing and holding the drip that exudes from the fresh food 2, and is a liquid absorbent fiber nonwoven fabric containing water absorbing fibers, for example, a thickness of 0.25 to 0.30 mm, and a mass of 45 to 45 mm. It is formed from an airlaid fiber nonwoven fabric containing pulp fibers having a density of 100 g / m ² and a density of 0.15 to 0.40 g / cm ³ . A general pulp fiber raw material can be used for the pulp fiber, and in addition to hardwood and coniferous wood fibers, plant fibers other than wood, synthetic fibers, and the like can also be used in combination. However, softwood pulp fibers are preferably used in consideration of sheet rigidity and tensile strength.

In the intermediate layer 13, a hot melt adhesive for joining the upper layer sheet 11 and the lower layer sheet 12 is applied at a rate of ¹ to 5 g / m ² . The hot melt adhesive can be intermittently applied in various application patterns such as spiral and dot shapes, but in order not to impede the air permeability of the opening 14 of the upper layer sheet 11. The coating is preferably performed with a width smaller than the diameter of the opening 14. In the present invention, the upper layer sheet 11 and the lower layer sheet 12 are bonded with a hot melt adhesive. However, as long as the technical effects of the present invention described later are obtained, various heat seals such as heat sealing and ultrasonic sealing are used. It can also be joined by welding means.

The bending rigidity (value) of the upper layer sheet 11 by the KES method is lower than the bending rigidity of the lower layer sheet 12 by the KES method. Specifically, the bending rigidity of the upper layer sheet 11 by the KES method is 0.0147 × 10 ⁻⁴ Nm / m, and the bending rigidity of the lower layer sheet 12 by the KES method is 0.1835 × 10 ⁻⁴ Nm / m. Moreover, the bending recovery property by the KES method of the upper layer sheet 11 is 0.0049 × 10 ⁻² Nm / m, and the bending recovery property by the KES method of the lower layer sheet 12 is 0.2973 × 10 ⁻² Nm / m. .

<Measurement method of bending stiffness and bending recovery>
This was carried out using a KES-FB2-AUTO-A bend measurement tester manufactured by Kato Tech Co., Ltd. First, each sheet was cut into a size of 100 mm in the vertical direction (flow direction MD in the sheet production line) × 30 mm in the horizontal direction (direction CD intersecting the MD direction) to prepare a sample. Next, after zeroing the scale of the measurement tester, a sample was set so as to bend in the vertical direction and the measurement was started, and the value of B-2HB displayed on the screen of the measurement tester was recorded. Next, the sample was set so as to bend in the horizontal direction and the measurement was started, and similarly, the value of B-2HB displayed on the screen of the measuring instrument was recorded. The bending stiffness was calculated according to the following formula 1, and the bending recovery value was calculated according to the following formula 2.

  Referring to FIG. 2, the drip sheet 10 has first and second edges 10 a and 10 b extending in the second direction so as to face each other in the longitudinal direction Y, and facing each other in the second direction X in the first direction Y. The first and second side edges 10c and 10d extend. The second side edge 10d has a length dimension in the longitudinal direction Y larger than that of the first side edge 10c, and the first end edge 10a is orthogonal to the linear first and second side edges 10c, 10d. The second end edge 10b extends obliquely between the first side edge 10c and the second side edge 10d, while extending linearly. For convenience of explanation, the drip sheet 10 is divided into an arrangement area 20 where the fresh food 2 is arranged, and a deformation area (an anisotropic area, a curl area) 30 having a shape different from the arrangement area 20. In the illustrated example, only one deformation region 30 is provided, but a plurality of deformation regions 30 may be arranged so as to face each other in the longitudinal direction Y or the lateral direction X.

  The arrangement area 20 and the deformation area 30 of the drip sheet 10 are separated by a virtual boundary line 18 extending in the lateral direction X. The virtual boundary line 18 extends linearly from the bending point 17 formed by the intersection of the first side edge 10c and the second end edge 10b toward the second side edge 10d. In this specification, the virtual boundary line 18 is for indicating the boundary between the arrangement area 20 and the deformation area 30, and is the first of the drip sheets 10 in which the arrangement area 20 and the deformation area 30 are arranged. It means a line that extends in a second direction that intersects the direction and extends in a straight line overlapping with a point (change point) where the dimension in the second direction changes. In the aspect of FIG. 2, the boundary line 18 is such that the arrangement area 20 and the deformation area 30 are arranged in the longitudinal direction (first direction) Y, and the dimension in the short direction (second direction) X intersecting the arrangement area 20 and the deformation area 30 changes. That is, it extends linearly from the bending point 17 in the lateral direction X.

  Since the arrangement | positioning area | region 20 and the deformation | transformation area | region 30 which arrange | position the fresh food 2 of the drip sheet | seat 10 are formed continuously, the virtual boundary line 18 which divides them cannot be visually recognized. However, the deformation area 30 has a shape different from that of the arrangement area 20, and the change in the shape can exhibit design in the outer shape, so that an employee of a retail store or the like places the drip sheet 10 on the bottom wall 1 a of the tray 1. When laying and placing the fresh food 2 thereon, it can be said that the fresh food 2 is arranged in the arrangement area 20 so that a part of the fresh food 2 is not located in the deformation area 30 consciously or unconsciously. However, in order to guide the user to place the fresh food 2 only in the arrangement area 20 of the drip sheet 10, “Do not place fresh food in the deformation area on the packaging bag of the drip sheet 10. It is preferable to print a description relating to handling such as “

  The deformation area 30 has a substantially triangular shape having a sharpened portion 33 including a tip 33a, and has a base composed of the boundary line 18, and one side 31 and the other side 32 that intersect with each other to form the sharpened portion 33. In the present embodiment, the one side 31 is formed by the second end edge 10b, and the other side 32 is formed by a part of the second side edge 10d. The deformation area 30 has a first dimension D1 composed of the length dimension of the boundary line (base) 18, and a second dimension D2 composed of the length dimension of the outline of the deformation area 30. In the present specification, the first dimension D1 is the length dimension of the boundary line in the second direction intersecting the first direction in which the arrangement area 20 and the deformation area 30 are arranged, and the second dimension D2 is the second dimension D2. It is the length dimension of the outline of the deformation area 30 between the opposing edges facing each other in the direction. In the aspect illustrated in FIG. 2, the first dimension D1 is the length dimension of the boundary line 18 in the lateral direction X that intersects the longitudinal direction Y in which the arrangement area 20 and the deformation area 30 are arranged, and the second dimension D2. Is a length dimension between the first and second side edges 10c, 10d facing each other in the short direction X of the one side 31 which is the outline of the deformation region 30.

  The deformation area 30 has a shape different from that of the arrangement area 20 having a rectangular shape, and as a whole, in addition to a design reminiscent of plants such as large leaves and petals, a design reminiscent of animals, characters, artifacts, etc. It may have. Further, the deformation area 30 may have a decorative element such as a character, a figure, a symbol, a pattern, or an uneven pattern.

  When the length dimension L1 in the longitudinal direction Y of the drip sheet 10 is 100 to 150 mm and the length dimension W1 in the lateral direction X is 50 to 80 mm, the length dimension L2 in the longitudinal direction Y of the arrangement area 20 is 100 to 100 mm. The length dimension L3 in the longitudinal direction Y of 140 mm and the deformation | transformation area | region 30 is 10-50 mm. The size and shape of the tray 1 vary depending on the type and size of the fresh food 2 to be accommodated, but the fresh food 2 directly contacts the sashimi tabs covering the entire bottom surface of the fresh food 2. In order to suppress this, the area of the arrangement area 20 is preferably 70 to 95% of the area of the bottom wall 1 a of the tray 1.

  FIG. 4 is a side view of the drip sheet 10 placed on the placing surface 5 having a smooth surface and the fresh food 2 placed on the upper surface 3 and allowed to stand for 5 minutes. In such a state, the deformation region 30 of the drip sheet 10 is in a curled (warped) state so as to warp obliquely upward from the placement surface 5. In this way, the deformable area 30 is curled upward to form a three-dimensional aspect, whereby the design of the tray 1 is improved, the appearance of the fresh food 2 is improved, and the consumer's willingness to purchase can be enhanced. . About 1 minute after the fresh food 2 is placed on the upper surface 3, the deformation area 30 is curled almost entirely at the boundary line 18. Therefore, in the backyard of a retail store or the like, when an employee or the like places the fresh food 2 on the drip sheet 10 and wraps it, the deformed area 30 is already curled upward when arranged at the storefront. , You can appeal to the consumer of good-looking.

  In order to make the deformation area 30 of the drip sheet 10 into a three-dimensional aspect, for example, a process of making a fold in the boundary line 18 in the manufacturing process or forming the deformation area 30 in three dimensions. However, in such a case, there is a possibility that the deformation region 30 becomes three-dimensional in a packaged state and becomes bulky, and there is a risk that the three-dimensional shape of the deformation region 30 may collapse when handled. . Since the drip sheet 10 is flat as a whole in a packaged state, the drip sheet 10 is not bulky and is easy to handle during use.

  The upper layer sheet 11 constituting the drip sheet 10 is formed of a synthetic resin film having a plurality of apertures 14, and the synthetic resin is formed when the synthetic resin film is punched to form the plurality of apertures 14. Surface curl properties appear on the film itself. Further, even when the lower layer sheet 12 is joined to the upper layer sheet 11 through the intermediate layer 13 made of a hot melt adhesive, the lower layer sheet 12 is easily curled due to the influence of the surface curl characteristics of the upper layer sheet 11. It can be said. In addition, since the flexural rigidity of the upper layer sheet 11 by the KES method is lower than the flexural rigidity of the lower layer sheet 12 by the KES method, the force F2 for shrinking the upper layer sheet 11 acts relatively large.

  Further, when the fresh food 2 is placed on the upper surface 3 of the drip sheet 10 and the lower layer sheet 12 absorbs the drip through the upper layer sheet 11, the pulp fiber of the lower layer sheet 12 absorbs and retains moisture and swells. It expands and the whole sheet extends slightly outward. Since the force F2 to be contracted acts on the upper layer sheet 11 with respect to the force F1 of the lower layer sheet 12 to extend, and the bending rigidity of the upper layer sheet 11 is smaller than that of the lower layer sheet 12, the drip It can be said that the outer peripheral edge of the sheet 10 is easily curled inward. Furthermore, when the fresh food 2 is placed in the arrangement area 20, it can be said that a curl tendency occurs in the deformation area 30 where the fresh food 2 is not placed due to a reaction caused by its own weight.

  Since the energy for curling the deformation area 30 is very small, the overall dimensions of the drip sheet 10 in the longitudinal direction Y and the lateral direction X cannot be curled. Therefore, unlike the end portion on the first end edge 10 a side of the drip sheet 10, a portion (square portion) having the overall dimension in the short direction X is not curled like the deformation region 30.

  The deformation region 30 has a sharpened shape in which the width direction (dimension in the short direction X) gradually decreases, and the second dimension D2 is larger than the first dimension D1, so that even the minute energy is easily curled. It has become. In addition, when the portion of the lower layer sheet 12 where the drip is absorbed is greatly separated from the deformation region 30, the applicant has the influence on the deformation region 30 even if the pulp fiber absorbs the drip and swells. It has been found that the deformation area 30 does not curl to the extent that the fresh food 2 looks good or does not curl at all. That is, in order for the deformation zone 30 to curl to the required extent, the drip is absorbed on the boundary line 18 between the placement zone 20 and the deformation zone 30 or in the vicinity thereof, and the pulp fiber swells and expands. It is necessary for the drip on 18 to be absorbed.

  From the above, 1) the bending stiffness value of the upper layer sheet 11 formed from the apertured film by the KES method is lower than the bending stiffness of the lower layer sheet 12 by the KES method, and 2) the lower layer sheet 12 absorbs the drip. 3) The deformation zone 30 has a sharpened portion 33 and the second dimension D2 is larger than the first dimension D1. 4) The placement zone 20 is deformed. Absorbing the drip on or near the boundary line 18 with the region 30 may be necessary to curl the deformation region 30 to the required extent.

  As the lower layer sheet 12, various known fiber nonwoven fabrics can be used as long as they are liquid-absorbing fiber nonwoven fabrics that absorb drip and extend, but by using a relatively low-density airlaid fiber nonwoven fabric, comparison is made. Compared with the case of using a high-density fiber nonwoven fabric or the like, it can be said that the degree of elongation of the sheet is further increased since the pulp fibers having absorbed the drip have sufficient fiber voids to swell.

  In addition, since the inner angle α of the triangular sharp portion 33 forming the deformation area 30 is an acute angle, the entire deformation area 30 can be curled more reliably. The internal angle α of the sharpened portion 33 is at least an acute angle, and preferably 5-80 °. When the inner angle α is less than 5 °, the tip of the sharpened portion 33 is curled too much, and the lower layer sheet 12 may sag toward the upper surface 3 side and may deteriorate in appearance. On the other hand, when the internal angle α exceeds 90 °, the degree of taper of the sharp portion 33 becomes low, and the sharp portion 33 may not be curled to the required degree by the minute energy generated when the drip sheet 10 absorbs the drip.

  In this specification, the inner angle of the sharp point of the triangle forming the deformation area is the base of the entire boundary line or a part thereof even if the outer shape of the deformation area is a circle, ellipse, or polygon other than a triangle. As the inner angle of the sharp point of a virtual triangle defined by both sides connecting the bottom and the outermost edge that protrudes outward most. Therefore, even in the case where the outer shape of the triangular shape is not formed, as in the deformation areas 70, 80, 90 of the drip sheet 10 in other embodiments described later, the interior angle in the virtual triangle is an acute angle, preferably 5 ~ 80 °.

  As described above, in order to curl the deformation region 30 to a required extent, it is necessary that the drip is absorbed in the vicinity of the boundary line 18. Specifically, the drip is absorbed on the boundary line 18. Alternatively, it is preferable that the drip absorption area is not separated from the boundary line 18 by 100 mm or more. When the absorption area of the drip is separated from the boundary line 18 by 100 mm or more, the minute energy for curling the deformation area 30 becomes difficult to act, and the entire deformation area 30 may not be curled. .

  On the other hand, when the drip diffuses further from the boundary line 18 toward the sharpened portion 33, the drip is diffused in a wide range of the deformation region 30 and becomes a wet state. Own weight increases. Therefore, the deformation region 30 cannot be curled by the minute energy generated by the drip sheet 10, and even if a part on the boundary line 18 side can be curled, the sharpened portion 33 hangs down by its own weight. Therefore, it is not preferable in appearance.

  In the case of a normal pulp airlaid fiber nonwoven fabric, the diffusibility of the drip is excellent by capillary action, but in this embodiment, the drip absorbed by the lower layer sheet 12 is difficult to diffuse. It has a sheet characteristic of absorbing the exuding drip. Such sheet characteristics depend on the characteristics of a binder (adhesive) applied by a spray method or the like for joining the pulp fibers of the lower layer sheet 12. The rubber adhesive used, for example, synthetic rubber (SBR), which is a copolymer of styrene and butadiene, is preferably used. Conventionally, as an airlaid fiber nonwoven fabric binder for forming a drip sheet for foods, a binder derived from an acrylate ester has been suitably used. However, by using a binder made of a hydrophobic elastomeric synthetic resin, it is diffusible. And can absorb drip pinpoint.

  Table 1 shows the measurement results of the water absorption degree of each material (1) and (2) measured in accordance with “Water absorption test method by paper and paperboard Krem method” defined in JIS P8141. . The material (1) is a lower layer sheet 12 using a rubber adhesive (SBR) of a styrene elastomer as a binder of pulp fibers, and the material (2) is an airlaid fiber nonwoven fabric having the same composition as the lower layer sheet 12 A binder using an adhesive derived from an acrylic ester was used as a binder.

<Measurement method of Krem absorbency>
Samples for measurement of each sheet (vertical dimension 150 mm × horizontal dimension 25 mm) were prepared. For the measurement of water absorption by Klem, a petri dish containing water, a stand having a vertically extending shaft and an arm extending horizontally from the top of the shaft, a ruler, and a stopwatch were used. Place a petri dish below the stand arm, attach one end of the sample in the longitudinal direction (flow direction MD of the sheet production line) to the tip of the stand arm, and hang the sample downward from the arm. The end is immersed in water in a petri dish and left in a standard atmosphere at a temperature of 20 ° C. and a humidity of 60% for 5 minutes. The distance at which the sample sucked up water for 5 minutes every 30 seconds from the time the sample was immersed in water, that is, after 30 seconds, 60 seconds, 120 seconds, 180 seconds, 240 seconds, and 300 seconds. The height from the water surface) was measured with a ruler, and the values at that time were determined. The same measurement was performed in the short direction of the sample (direction CD intersecting the flow direction of the sheet production line). The measurement was carried out five times for each of the longitudinal direction and the transverse direction, and the average value was defined as the Krem water absorption (mm) at each time (second). The longer the suction distance, the higher the water absorption (diffusivity).

  As shown in Table 1, the Klem water absorption in the longitudinal direction of the lower layer sheet 12 after 5 minutes is 7.7 mm, the Klem water absorption in the short direction is 3.3 mm, and an adhesive derived from an acrylate ester is used as a binder. The airlaid fiber nonwoven fabric had a Klem water absorption of 25.3 mm in the longitudinal direction and 24.3 mm of Klem water absorption in the short direction. Moreover, the lower layer sheet | seat 12 did not change in a Klem water absorption degree in the longitudinal direction and the transversal direction when 3 minutes passed. The lower the Klem water absorption of the lower layer sheet 12 is, the lower the diffusibility is. However, if the lower layer sheet is too low, the drip absorbability may be deteriorated. It is preferable that the water absorption of Klem after 5 minutes in Y or short direction X is 2.0-10.0 mm. Thus, it can be said that the lower layer sheet 12 can be spot-absorbed at the portion exuded from the fresh food 2 without the spread of the absorbed drip widely due to its relatively low Clem water absorption.

  Since the deformation region 30 is composed of the upper layer sheet 11 made of an apertured film and the lower layer sheet 12 made of a liquid absorbent fiber nonwoven fabric, as in the arrangement region 20, a plurality of apertures 14 are formed on the upper surface 3. In addition to having liquid absorption. Some conventional drip sheets do not have a plurality of apertures and do not have liquid absorbency in consideration of design, production cost, etc. Since the plurality of apertures 14 are formed in the upper surface 3 of the deformation area 30, the upper layer sheet 11 becomes softer and more easily curled as compared to the case where it is not formed. Moreover, even if the perishable food 2 placed on the tray 1 and the drip sheet 10 is relatively large and reaches a part of the deformed area 30 because the deformable area 30 has liquid absorbency. The drip that has exuded from the fresh food 2 can be quickly absorbed and held in the deformation zone 30.

  Referring again to FIG. 1, in the state where the fresh food 2 is placed and laid on the bottom wall 1 a of the tray 1, the drip sheet 10 is positioned on the inclined peripheral wall 1 b of the tray 1. doing. The deformation area 30 of the drip sheet 10 is curled by the absorption of the drip and is positioned on the peripheral wall 1b, so that the deformation area 30 is bottomed more three-dimensionally when the consumer views the packaged tray 1 from above. It looks like it is floating from the wall 1a, and the design is improved. Thus, in order for the deformation region 30 itself to curl and a part thereof to be located on the peripheral wall portion 1b, a synergistic three-dimensional design effect can be achieved, and about 20 to 60% of the deformation region 30 It is preferable that the part which has the area of is located on the surrounding wall 1b. In addition to being inclined, the peripheral wall 1b preferably has one or a plurality of steps in order to make the deformation region 30 appear more three-dimensional.

  It is preferable that the sharpened portion 33 of the deformation area 30 does not extend outward beyond the peripheral wall 1b. In such a case, since the sharp portion 33 is positioned on the flange portion 1c, the sharp portion 33 is restrained between the wrap and the flange portion 1c when the tray 1 is packaged with the wrap film, and the deformation range. It will be in the state where 30 was suspended upwards, and appearance will worsen.

  In the deformation area 30, the outline is not a simple straight line, and the lines that form the outline intersect at a part thereof, that is, the straight line and the straight line, the straight line and the curve, or the curved line and the curve intersect each other. Is preferably a line having at least one inflection point. Thus, by having at least one inflection point in the outer shape line of the deformation area 30, the deformation area 30 can have high decorativeness as compared with a simple linear shape, and the deformation area 30 can exhibit decorativeness.

  The deformation region 30 may be formed not on the second end edge 10b side but on the first end edge 10a side, or may be formed on the first and second end edges 10a, 10b side, respectively. Furthermore, it may be formed on the first side edge 10c or the second side edge 10d side, or may be formed on the first and second side edges 10c, 10d side, respectively. However, it is preferable that the deformation region 30 is not formed in both the first direction and the second direction X, Y intersecting each other like the first end edge 10a side and the first side edge 10d side. In such a case, the boundary lines 18 that form the bases of the decorative portions intersect with each other, and forces that curl the deformation area 30 interact with each other, so that a part of the deformation area 30 may not easily warp. Because there is.

<Other embodiments>
FIGS. 5A to 5C, 6 </ b> A, 6 </ b> B, and 7 are plan views of another example of the drip sheet 10. Except the difference regarding the shape of the deformation area 30, it has the same configuration as the drip sheet 10 according to the present embodiment. The outline of each embodiment has at least one inflection point.

  Referring to FIG. 5A, in the present embodiment, the deformation area 40 has two triangular decorative portions (deformation portions) 41 and 42. The decorative portions 41 and 42 have the same shape and size, and the boundary line 18 between the placement area 20 and the deformation area 40 forms the bottom sides of the two decorative parts 41 and 42. The boundary line 18 extends in the lateral direction X with the same dimensions as the apexes of the decorative portions 41 and 42 that are the bending points 47a and 47b of the first and second side edges 10c and 10d. The interior angle α of each of the decorative portions 41 and 42 is an acute angle, and the second dimension D2 is the first and second opposing each other in the lateral direction X intersecting the longitudinal direction Y in which the arrangement area 20 and the deformation area 40 are arranged. Since it is the length dimension of the outline of the deformation area 30 between the side edges 10c, 10d, it is the dimension obtained by adding the oblique sides of the decorative portions 41, 42 together. The second dimension D2 is larger than the first dimension D1.

  Referring to FIG. 5B, in the present embodiment, the deformation area 50 includes three triangular decorative portions (deformed portions) 51-53. The decorative portions 51-53 have the same shape and the same size, and the boundary line 18 between the placement area 20 and the deformation area 50 forms the bottom of the three decorative portions 51-53. The boundary line 18 extends in the lateral direction X between the bending points 57a and 57b of the first and second side edges 10c and 10d. The interior angle α of each decorative portion 51-53 is an acute angle, and the second dimension D2 is the first and second opposing each other in the lateral direction X intersecting the longitudinal direction Y in which the arrangement area 20 and the deformation area 50 are arranged. Since it is the length dimension of the outline of the deformation region 50 between the side edges 10c, 10d, it is the dimension obtained by adding up both oblique sides of all the decorative portions 51-53. The second dimension D2 is larger than the first dimension D1.

  Referring to FIG. 5C, in the present embodiment, the deformation area 60 includes four triangular decorative portions (deformation portions) 61-64. The decorative portions 61-64 have the same shape and size, and the boundary line 18 between the placement area 20 and the deformation area 60 forms the bottom sides of the four decorative portions 61-64. The boundary line 18 extends in the lateral direction X between the bending points 67a and 67b of the first and second side edges 10c and 10d. The interior angle of each decorative portion 61-64 is an acute angle, and the second dimension D2 is the first and second sides facing each other in the lateral direction X intersecting the longitudinal direction Y in which the arrangement area 20 and the deformation area 60 are arranged. Since it is the length dimension of the outline of the deformation area 30 between the edges 10c and 10d, it is a dimension obtained by adding up both oblique sides of all the decorative portions 61-64. The second dimension D2 is larger than the first dimension D1.

  Referring to FIG. 6A, in the present embodiment, the deformation area 70 has a substantially large leaf shape, and the boundary line 18 with the arrangement area 20 extends obliquely. The deformation area 70 is a pointed portion 73 of an imaginary triangle connecting the bending point 77a of the first side edge 10c, the bending point 77b of the second side edge 10d, and the outermost edge 70a located most outward in the first direction Y. Have The internal angle α of the sharpened portion 73 is an acute angle, and the boundary line 18 extends in the lateral direction X between the bending points 77a and 77b of the first and second side edges 10c and 10d, and the first dimension D1 is the boundary This is the length dimension of the line 18. The second dimension D2 is the outline of the deformation area 30 between the first and second side edges 10c, 10d facing each other in the short direction X intersecting the longitudinal direction Y in which the arrangement area 20 and the deformation area 70 are arranged. Since it is a dimension, it is the length dimension of the serrated outline 10b of the deformation zone 70. The second dimension D2 is larger than the first dimension D1.

  In the present embodiment, the outer shape line (second end edge) 10b of the deformation area 70 is serrated and has a large leaf design as a whole. It can be said that the decoration is high. Further, since the outer shape line 10b of the deformation area 70 has a plurality of protrusions 71, after the deformation area 70 is curled from the vicinity of the boundary line 18, the plurality of protrusions 71 are curled together with or after the sharpened portion 73. As described above, since the deformation area 70 has the plurality of protrusions 71, the minute energy of the drip sheet 10 acts not only on the sharpened portion 73 but also on the plurality of protrusions 71 smaller than that, so that the deformation area 70 is further curled. It can be said that it becomes easy.

  Referring to FIG. 6B, in the present embodiment, the drip sheet 10 has a generally ship (boat) shape as a whole, and the deformation region 80 has a convex curve shape. The deformation area 80 has a virtual triangular sharpened portion 83 connecting the bending point 87a of the first side edge 10c, the bending point 87b of the second side edge 10d, and the outermost edge (tip edge) 80a. The inner angle of the sharpened portion 83 is an acute angle, and the boundary line 18 extends in the lateral direction X between the bending points 87a and 87b of the first and second side edges 10c and 10d, and the first dimension D1 is the boundary line. 18 length dimensions. The second dimension D2 is a convex curve shape of the deformation region 80 between the first and second side edges 10c and 10d facing each other in the lateral direction X intersecting the longitudinal direction Y in which the arrangement region 20 and the deformation region 80 are arranged. It is the length dimension of the outline 10b having The second dimension D2 is larger than the first dimension D1.

  Referring to FIG. 7, in the present embodiment, the deformation area 90 has a substantially balun shape. The deformation area 90 has a sawtooth outer shape formed by the first side edge 10c, and has four approximately triangular decorative portions (deformed portions) 91-94. The decorative portion 91 protrudes outward from the other decorative portions 92-94, and the other decorative portions 92-94 have the same shape and the same size. The boundary line 18 extends in the longitudinal direction Y from the bending point 97a of the second edge 10b toward the first edge 10a, and the first dimension D1 is the length dimension of the boundary line 18. The decorative portion 91 has a virtual triangular sharp portion 96a having a part of the boundary line 18 as a base 18a. Similarly, the decorative portions 92-94 respectively have virtual triangular pointed portions 96b, 96c, 96d in which a part of the boundary line 18 is the bases 18b, 18c, 18d. The internal angles α1 and α2 of the sharp portions 96a to 96d of each virtual triangle are acute angles, and the internal angle α1 of the sharp portion 96a of the decorative portion 91 is greater than the internal angles α2 of the sharp portions 96b to 96d of the other decorative portions 92-94. Is also getting smaller.

  The second dimension D2 is a sawtooth shape of the deformation area 90 between the first and second end edges 10a, 10b facing each other in the longitudinal direction Y intersecting the short direction X in which the arrangement area 20 and the deformation area 90 are arranged. It is the length dimension of the outline (first side edge) 10c. The second dimension D2 is larger than the first dimension.

  Table 2 is a table showing the results of curl (warping) measurement of the drip sheet 10 according to Examples 1 to 4 of the present invention and the drip sheet according to Comparative Examples 1 to 5. The drip sheet 10 according to Examples 1 to 4 and the drip sheets according to Comparative Examples 1 to 5 have a rectangular shape, the dimension in the short direction is 65 mm, the dimension in the long direction is 160 mm, and the arrangement in which fresh food is arranged. The dimension in the longitudinal direction of the region is 120 mm, and the dimension in the longitudinal direction of the deformation region having design properties is 40 mm.

<Examples 1-4>
The drip sheet 10 according to Examples 1 to 4 has a mass of 83.12 g / m ² , a thickness of about 1.2 mm, and an upper layer sheet 11 made of an apertured film made of polyethylene and having a thickness of 25 μm. It has a two-layer sheet structure composed of a lower layer sheet 12 formed from an airlaid fiber nonwoven fabric having 52 g / m ² of pulp fibers. In the drip sheet 10 of Examples 1 to 4, the upper and lower layer sheets 11 and 12 are joined to each other via an intermediate layer 13 formed from a styrene-based elastomer synthetic resin adhesive (SBR) having a mass of 2 g / m ^2. Yes. Examples 1-4 correspond to the embodiments illustrated in FIGS. 2, 5A, 5B, and 5C, respectively.

Moreover, the bending rigidity of the upper layer sheet 11 of the drip sheet 10 of Examples 1 to 4 is 0.0147 × 10 ⁻⁴ Nm / m, the bending recovery property is 0.0049 × 10 ⁻² Nm / m, and the lower layer The bending rigidity of the sheet 12 is 0.1835 × 10 ⁻⁴ Nm / m, and the bending recovery property is 0.2973 × 10 ⁻² Nm / m.

<Comparative Examples 1-3>
The drip sheets of Comparative Examples 1 to 3 have the same sheet configuration as the drip sheet 10 of Examples 1 to 4, and have a mass of 83.12 g / m ² and a thickness of about 1.2 mm. In addition, the drip sheet is a two-layer sheet structure composed of an upper layer sheet made of a polyethylene-made perforated film having a thickness of 25 μm and a lower layer sheet formed of an airlaid fiber nonwoven fabric having pulp fibers with a mass of 52 g / m ^2. Have

In the drip sheets of Comparative Examples 1 to 3, the upper and lower layer sheets are bonded to each other via an intermediate layer formed from a styrene-based elastomer synthetic resin adhesive (SBR) having a mass of 2 g / m ² . Moreover, the bending rigidity and bending recovery property of each of the upper and lower layer sheets of the drip sheets of Comparative Examples 1 to 3 are the same as those of Examples 1 to 4.

<Comparative Example 4>
The drip sheet according to Comparative Example 4 has a mass of 87.77 g / m ² and a thickness of about 1.17 mm, and is composed of an upper layer sheet made of an apertured film made of polyethylene and having a thickness of 50 μm, and a mass of 52 g / m ^2. And a lower layer sheet formed from an airlaid fiber non-woven fabric having a pulp fiber. In such a drip sheet, the upper and lower layer sheets are joined to each other via an intermediate layer formed from a styrene-based elastomer synthetic resin adhesive (SBR) having a mass of 2 g / m ² . In addition, the bending rigidity of the upper layer sheet of the drip sheet of Comparative Example 4 is 0.0965 × 10 ⁻⁴ Nm / m, the bending recovery property is 0.0209 × 10 ⁻² Nm / m, and the bending rigidity of the lower layer sheet is It is 0.1835 × 10 ⁻⁴ Nm / m, and the bending recovery property is 0.2973 × 10 ⁻² Nm / m.

<Comparative Example 5>
The drip sheet according to Comparative Example 5 has a single-layer sheet structure of a chemically bonded fiber nonwoven fabric having a thickness of 0.45 mm and a mass of 48 g / m ² . The drip sheet of Comparative Example 5 has a bending rigidity of 1.1141 × 10 ⁻⁴ Nm / m and a bending recovery property of 0.5147 × 10 ⁻² Nm / m.

<Shape of deformation area>
The deformation area 30 of Example 1 is one triangular decorative part, the deformation area 40 of Example 2 is two triangular decorative parts, and the deformation area 50 of Example 3 is three triangular decorative parts. The deformation area 60 of the fourth embodiment has four triangular decorative portions. The deformation area of Comparative Example 1 is a substantially rectangular decorative part having the same width dimension in the short direction as the arrangement area, and the deformation area of Comparative Example 2 is approximately half the width dimension in the short direction of the arrangement area. The substantially square-shaped decorative part having a width dimension of the same, the deformation area of Comparative Example 3 is a substantially trapezoidal decorative part having a base similar to the width dimension in the short direction of the arrangement area, Comparative Example 4 and The five deformation areas are each formed from four triangular decorative portions.

  The photographs of the drip sheets in each of the examples and the comparative examples are taken from the side after measurement of the following curl degree measurement, and the deformation area of each drip sheet is curled. In addition, regarding the “angle (°)”, the angle of the colored sharpened portion was measured.

<Measurement method of curl degree>
In order to compare the curl degree of the drip sheet of each Example and each Comparative Example, the following measuring method was used. First, as a tool to be used, a pipette (which can measure at least 5 ml), a ruler, a bat (made of stainless steel), a stopwatch, and a red pen were prepared. Next, each drip sheet was cut into a size of 65 mm in the lateral direction × 160 mm in the longitudinal direction to obtain a measurement sample. In each sample, a linear mark line extending in the short direction with a red pen was drawn at a position of 120 m from one edge in the short direction where the deformation area was not located to the other edge side in the short direction where the deformation area was located. In each sample, an area having a width of 120 mm from one edge in the short direction to a mark line marked with a red pen was set as an arrangement area, and an area having a width of 40 mm from the mark line to the other edge in the short direction was set as a deformation area.

  Next, 5 ml of tap water was dropped on the vat placed on the mounting table, and the sample was placed on the vat so that the tap water was absorbed in the entire arrangement area of each sample. After water was absorbed to the mark line of the sample, it was left for 1 minute in a standard atmosphere. Thereafter, the distance (mm) between the most warped portion of the deformation region in the dry state and the surface of the mounting table was measured with a ruler. When the width dimension of the deformation zone is relatively large, three portions with large warping are measured and averaged, and the average value obtained by performing the same measurement a plurality of times (N = 3) is used to determine the curl degree of each sample. (Mm).

<Curl evaluation>
According to the applicant's knowledge, when the degree of curl (mm) exceeds 10 mm, the deformation area of the drip sheet has a three-dimensional aspect to the extent that the fresh food looks good. Furthermore, when the degree of curl exceeds 15 mm, the deformation area becomes a more three-dimensional aspect, and the fresh food looks better. On the other hand, when the curl degree is 10 mm or less, the deformation area does not have a three-dimensional aspect to the extent that the appearance of the fresh food becomes good. Therefore, when the degree of curl was 10 to 15 mm, it was evaluated as “Δ (possible)”;

  Referring to Table 2, the curl degrees of Examples 1 to 4 were 12.7 to 18.9 mm, and the curl evaluation was “Δ (good)” or “◯ (good)”. On the other hand, the curl degrees of Comparative Examples 1 to 5 were 4.6 to 9.9 mm, and the curl evaluation was “x (impossible)”. That is, the drip sheet 10 according to Examples 1 to 4 has a curl degree of at least 10 mm or more, and the deformation areas 30, 40, 50, and 60 are three-dimensionally formed when accommodated in the tray 1. It can be said that the appearance of the fresh food 2 is improved. Further, from the curl measurement results of Examples 1 to 4, it can be said that the smaller the interior angle of the decorative portion, the larger the curl. On the other hand, as in Comparative Examples 1 to 3, when the decorative portion did not have a sharp portion, it was difficult to curl even if the width dimension was small.

  When Example 4 and Comparative Example 4 are compared, when the thickness of the synthetic resin film forming the upper layer sheet is about twice, the curl degree is small. Accordingly, it can be said that when the thickness of the synthetic resin film is relatively large, the bending rigidity becomes high and the deformation region is hardly curled. Further, in Comparative Example 5, since the drip sheet has a single layer structure of a liquid-absorbing chemical bond fiber nonwoven fabric, even if a force that absorbs the drip and extends to the nonwoven fabric itself is applied, the embodiment relates to this embodiment. The drip sheet 10 is not subjected to the force of contraction by the synthetic resin film, and the energy to curl the entire deformation area is relatively small, and the curl degree is small. it is conceivable that.

  Unless otherwise specified, the constituent members constituting the drip sheet 10 use, without limitation, various known materials that are usually used in this type of field, in addition to the materials described in this specification. be able to. The terms “first”, “second”, etc. used in the present specification and claims for utility model registration are used merely to distinguish similar elements, positions, and the like.

DESCRIPTION OF SYMBOLS 1 Fresh food tray 1a Bottom wall 1b Perimeter wall 2 Fresh food 10 Drip sheet 11 Upper layer sheet 12 Lower layer sheet 14 Opening hole 17 Inflection point 18 Boundary line 20 Arrangement area 30 Deformation area 33 Sharp part 40 Deformation area 41, 42 Decoration part 50 deformation area 51, 52, 53 decoration part 60 deformation area 61, 62, 63, 64 decoration part 70 deformation area 71 protrusion 80 deformation area 90 deformation area 91, 92, 93, 94 decoration part X short direction (first direction) (Or the second direction)
Y Longitudinal direction (first direction or second direction)
α Interior angle α1 Interior angle α2 Interior angle

The first device of the present application is a two-layer sheet structure composed of an upper layer sheet formed from a film having a plurality of apertures and a lower layer sheet formed from a fiber nonwoven fabric containing water-absorbing fibers. The bending stiffness by the KES method is lower than the bending stiffness by the KES method of the lower layer sheet, an arrangement area where the fresh food is arranged, a deformation area located alongside the arrangement area in the first direction, and the arrangement area, and a virtual boundary line between the deformation zone, the deformation zone has at least horn peaked portion in the second direction of the drip sheet between opposite edges facing each other, of the deformation zone The length dimension of the outline is larger than the length dimension of the boundary line, and the Klem water absorption of the lower layer sheet is 2.0 to 10.0 mm.

The second invention of the present application is directed to a tray for the fresh food using drip sheet.

In one tray embodiment of the second invention, the area of the placement area of the drip sheet is 70 to 95% of the size of the area of the bottom wall.

Referring to FIG. 2, the drip sheet 10, first and second edges 10a extending opposite each other in the longitudinal direction Y in the lateral direction X, 10b and, in the longitudinal direction Y opposite to each other in the lateral direction X The first and second side edges 10c and 10d extend. The second side edge 10d has a length dimension in the longitudinal direction Y larger than that of the first side edge 10c, and the first end edge 10a is orthogonal to the linear first and second side edges 10c, 10d. The second end edge 10b extends obliquely between the first side edge 10c and the second side edge 10d, while extending linearly. For convenience of explanation, the drip sheet 10 is divided into an arrangement area 20 where the fresh food 2 is arranged, and a deformation area (an anisotropic area, a curl area) 30 having a shape different from the arrangement area 20. In the illustrated example, only one deformation region 30 is provided, but a plurality of deformation regions 30 may be arranged so as to face each other in the longitudinal direction Y or the lateral direction X.

The arrangement area 20 and the deformation area 30 of the drip sheet 10 are separated by a virtual boundary line 18 extending in the lateral direction X. The virtual boundary line 18 extends linearly from the bending point 17 formed by the intersection of the first side edge 10c and the second end edge 10b toward the second side edge 10d. In this specification, the virtual boundary line 18 is for indicating the boundary between the arrangement area 20 and the deformation area 30, and is the first of the drip sheets 10 in which the arrangement area 20 and the deformation area 30 are arranged. It means a line extending in a straight line overlapping with a point (change point) extending in the second direction of the drip sheet 10 extending in the second direction intersecting the direction. In the aspect of FIG. 2, the boundary line 18 is such that the arrangement area 20 and the deformation area 30 are arranged in the longitudinal direction (first direction) Y, and the dimension in the short direction (second direction) X intersecting the arrangement area 20 and the deformation area 30 changes. That is, it extends linearly from the bending point 17 in the lateral direction X.

The deformation region 30 may be formed not on the second end edge 10b side but on the first end edge 10a side, or may be formed on the first and second end edges 10a, 10b side, respectively. Furthermore, it may be formed on the first side edge 10c or the second side edge 10d side, or may be formed on the first and second side edges 10c, 10d side, respectively. However, it is preferable that the deformation region 30 is not formed in both the longitudinal direction Y and the lateral direction X intersecting each other like the first end edge 10a side and the first side edge 10d side. In such a case, the boundary lines 18 that form the bases of the decorative portions intersect with each other, and forces that curl the deformation area 30 interact with each other, so that a part of the deformation area 30 may not easily warp. Because there is.

Referring to FIG. 5A, in the present embodiment, the deformation area 40 has two triangular decorative portions (deformation portions) 41 and 42. The decorative portions 41 and 42 have the same shape and size, and the boundary line 18 between the placement area 20 and the deformation area 40 forms the bottom sides of the two decorative parts 41 and 42. The boundary line 18 extends in the lateral direction X with the same dimensions as the apexes of the decorative portions 41 and 42 that are the bending points 47a and 47b of the first and second side edges 10c and 10d. The interior angle α of each of the decorative portions 41 and 42 is an acute angle, and the second dimension D2 is the first and second opposing each other in the lateral direction X intersecting the longitudinal direction Y in which the arrangement area 20 and the deformation area 40 are arranged. Since it is the length dimension of the outline of the deformation area 40 between the side edges 10c and 10d, it is the dimension obtained by adding the hypotenuses of the decorative portions 41 and 42 to each other. The second dimension D2 is larger than the first dimension D1.

Referring to FIG. 5C, in the present embodiment, the deformation area 60 includes four triangular decorative portions (deformation portions) 61-64. The decorative portions 61-64 have the same shape and size, and the boundary line 18 between the placement area 20 and the deformation area 60 forms the bottom sides of the four decorative portions 61-64. The boundary line 18 extends in the lateral direction X between the bending points 67a and 67b of the first and second side edges 10c and 10d. The interior angle of each decorative portion 61-64 is an acute angle, and the second dimension D2 is the first and second sides facing each other in the lateral direction X intersecting the longitudinal direction Y in which the arrangement area 20 and the deformation area 60 are arranged. Since it is the length dimension of the outline of the deformation area 60 between the edges 10c and 10d, it is the dimension obtained by adding up both oblique sides of all the decorative portions 61-64. The second dimension D2 is larger than the first dimension D1.

Referring to FIG. 6A, in the present embodiment, the deformation area 70 has a substantially large leaf shape, and the boundary line 18 with the arrangement area 20 extends obliquely. The deformation zone 70 includes a virtual triangular sharpened point 73 connecting the bending point 77a of the first side edge 10c, the bending point 77b of the second side edge 10d, and the outermost edge 70a located most outward in the longitudinal direction Y. Have. The internal angle α of the sharpened portion 73 is an acute angle, and the boundary line 18 extends in the lateral direction X between the bending points 77a and 77b of the first and second side edges 10c and 10d, and the first dimension D1 is the boundary This is the length dimension of the line 18. The second dimension D2 is the outline of the deformation area 70 between the first and second side edges 10c, 10d facing each other in the short direction X intersecting the longitudinal direction Y in which the arrangement area 20 and the deformation area 70 are arranged. Since it is a dimension, it is the length dimension of the serrated outline 10b of the deformation zone 70. The second dimension D2 is larger than the first dimension D1.

Claims (9)

In a drip sheet for fresh food having an upper surface and a lower surface, a first direction and a second direction intersecting the first direction,
A two-layer sheet structure composed of an upper layer sheet formed from a film having a plurality of apertures and a lower layer sheet formed from a fiber nonwoven fabric containing water-absorbing fibers,
The bending rigidity by the KES method of the upper layer sheet is lower than the bending rigidity by the KES method of the lower layer sheet,
An arrangement area for arranging the fresh food, a deformation area located alongside the arrangement area in the first direction, and a virtual boundary line between the arrangement area and the deformation area;
The deformation zone has at least one sharpened portion;
The length dimension of the outer shape line of the deformation area between the opposing edges facing each other in the second direction of the drip sheet is larger than the length dimension of the boundary line,
The drip sheet, wherein the lower layer sheet has a Krem water absorption of 2.0 to 10.0 mm.   2. The drip sheet according to claim 1, wherein in the state where the fresh food is placed on the upper surface, the deformation region is curled by drip being absorbed on or in the vicinity of the boundary line.   The drip sheet according to claim 1 or 2, wherein the upper layer sheet is a thermoplastic synthetic resin film formed of polyethylene, and the lower layer sheet is an airlaid fiber nonwoven fabric containing pulp fibers.   The drip sheet according to claim 3, wherein the pulp fibers of the airlaid fiber nonwoven fabric are joined to each other via an adhesive using a styrene-based elastomer.   The drip sheet according to any one of claims 1 to 4, wherein the deformation area includes a triangular decorative portion having a base of the whole or a part of the boundary line, and an internal angle of the decorative portion is an acute angle.   The drip sheet according to any one of claims 1 to 5, wherein an outline of the deformation region has at least one inflection point.   The drip sheet according to any one of claims 1 to 6, wherein an outer shape line of the deformation region has the plurality of protrusions. A tray for fresh food using the drip sheet according to any one of claims 1 to 7,
A bottom wall on which the drip sheet on which the fresh food is disposed is laid, and a peripheral wall rising from an outer peripheral edge of the bottom wall, and a part of the deformation area is located on the peripheral wall Tray featuring.   The tray according to claim 8, wherein the area of the arrangement area of the drip sheet is 70 to 95% of the area of the bottom wall.