WO2010109630A1

WO2010109630A1 - Drip-absorbing mat

Info

Publication number: WO2010109630A1
Application number: PCT/JP2009/056123
Authority: WO
Inventors: 彰柴田; 雅彦鹿谷
Original assignee: ユニ・チャーム株式会社
Priority date: 2009-03-26
Filing date: 2009-03-26
Publication date: 2010-09-30
Also published as: BRPI0905720A2; CN201942134U

Abstract

Provided is a drip-absorbing mat capable of preventing the color of a food such as meat, which is placed thereon, in the side being in contact therewith from worsening. A drip-absorbing mat (10), which is to be underlaid beneath a food dripping with a blood-containing fluid, comprising an absorbent sheet member (11) capable of absorbing the drip and a porous surface sheet member (13) which is located above the absorbent sheet member (11) and comes into contact with the food, wherein the air permeability of the drip-absorbing mat (10) is improved both in the thickness direction and in the planar direction to thereby prevent the meat color in the side being in contact with the drip-absorbing mat (10) from worsening.

Description

Drip absorption mat

The present invention relates to a drip absorbent mat that is laid under food that produces blood juice (drip) such as meat and fish, and more particularly, to a drip absorbent mat that prevents color deterioration of food in contact with the drip absorbent mat.

In food departments such as supermarkets, fish, meat, and other foods are quantified in trays and sold in a transparent film. When taking such a sales form, the food is left in the display shelf for a long time, and drip (blood juice) tends to accumulate in the tray. The drip collected in the tray not only impairs the appearance but also causes the food to be damaged earlier. Usually, the tray on which food with blood juice (drip) such as meat or fish is placed is usually placed. There is a tray mat to absorb the drip.

Here, there is a type of tray mat that uses the cut nonwoven fabric as it is. However, in a tray mat that simply uses a single-layer nonwoven fabric, the absorbed drip is visible as it is from the surface of the tray mat. As a result, the appearance of the food is impaired. Also, since the absorbed drip is in direct contact with the food, it has not been very effective in delaying food damage.

Therefore, in order to solve such a problem, a tray mat of a type in which an aperture film is stretched on the surface of the nonwoven fabric has been devised. Examples of such a type of tray mat include those disclosed in Japanese Utility Model Laid-Open No. 3-85886 and Japanese Patent Application Laid-Open No. 9-86569. An opaque porous plastic sheet having a large number of three-dimensional pores is stretched on the surface of the absorbent sheet body. According to the tray mats disclosed in these publications, since the surface of the absorbent sheet body is covered with a sheet having a large number of holes, the drip and food absorbed by the absorbent sheet body by the sheet And the drip does not remain on the surface of the tray mat. For this reason, the appearance of the food placed on the tray is improved, and it is protected from the progress of food damage caused by drip.

However, in the tray mat described in the above publication, there is no consideration for the deterioration of the color of the food in contact with the mat, and when it is used, browning of the food (the color of the food in the portion in contact with the tray mat) is not used. A new problem has arisen that worsening) has progressed. When food is removed from the tray, if the portion of the food that comes into contact with the tray mat (that is, the back side of the food) turns brown, that food, even if it is the side that is not visible from the front Consumers will be given the impression that food quality is poor.

By the way, according to the study by the present inventors, the change in the color of food is caused by the change in myoglobin contained in meat or the like.

That is, the color of meat such as beef and fish such as tuna varies depending on the type of myoglobin derivative and the ratio of its existence. Here, the types of myoglobin derivatives include reduced myoglobin, oxymyoglobin, and metmyoglobin, but reduced myoglobin is purple red, oxymyoglobin is bright red, and metmyoglobin is brown. Is given an impression that the freshness is good in the order of bright red> purple red> brown.

In this regard, since the meat immediately after being cut is mostly reduced myoglobin, the meat just cut has a purple-red color. When this meat is placed in the air, oxygen molecules are coordinated with reduced myoglobin to form oxymyoglobin, and the meat becomes bright red. When left in the air, oxymyoglobin is oxidized to form metmyoglobin, and the meat becomes brown.

Here, the deterioration of the color of the meat is caused by the browning of the meat color due to the formation of metmyoglobin as described above, but the methonation is influenced by the partial pressure of oxygen, temperature, humidity, pH, salt concentration, light rays, etc. And proceed.

However, when metmyoglobin is formed from reduced myoglobin via oxymyoglobin (reduced myoglobin → oxymyoglobin → methmyoglobin) by the present inventors' study, directly from reduced myoglobin without oxymyoglobin. When metmyoglobin is formed (reduced myoglobin → metmyoglobin), the former can delay the deterioration of meat color due to metmyoglobin formation, and the process of changing myoglobin like the former It has been found that passing through can be ensured by making the drip absorbent mat laid under the meat sufficiently breathable.

The present invention has been made in view of the above circumstances, and its purpose is to prevent the deterioration of the color of food (meat) on the side in contact with food such as meat. It is to provide a drip absorbent mat that can be used.

Therefore, the drip absorbent mat according to the first invention of the present application is a drip absorbent mat that is laid under the food from which blood juice (drip) comes out, the absorbent sheet body that absorbs the drip, and the absorbent sheet body A porous surface sheet body disposed on the upper side and in contact with food, and the air permeability in the surface direction and / or the air permeability in the thickness direction of the absorbent sheet body is adjusted, whereby the porous It is set as the structure which prevents the back surface color deterioration of the foodstuff which touches a surface sheet body.

According to such a configuration, the drip absorption mat is adjusted for the air permeability in the surface direction and / or the air permeability in the thickness direction, and has good air permeability, so that the meat produced by the formation of metmyoglobin. The deterioration of the color of food such as meat can be delayed, and the deterioration of the color of food such as meat on the side in contact with the mat can be prevented.

Thus, when food such as meat is placed, a drip absorption mat capable of preventing the deterioration of the color of the food (meat) on the side in contact with the food is obtained. From this, the drip absorbent mat according to the present invention can be positioned as a drip absorbent mat for preventing the deterioration of the color of the back surface of the food (particularly food containing myoglobin such as meat) placed thereon.

The drip absorbent mat according to the second invention of the present application is a drip absorbent mat laid under a food product from which blood juice (drip) comes out, the absorbent sheet body for absorbing the drip, and the absorbent sheet body The drip absorption mat itself has a ventilation resistance value in the thickness direction of 1.00 Kpa · s / m or less.

According to such a configuration, in addition to the effects and advantages of the first invention, the airflow resistance value in the thickness direction of the drip absorbent mat itself is adjusted to 1.00 Kpa · s / m or less, thereby allowing airflow. Therefore, it is possible to more advantageously prevent the color deterioration of food such as meat on the side in contact with the mat.

Further, the drip absorbent mat according to the third invention of the present application is the drip absorbent mat according to the second invention, wherein the ventilation resistance value in the thickness direction of the porous surface sheet is 0.020 Kpa · s / m or less. It is configured.

According to such a configuration, by setting the airflow resistance value in the thickness direction of the porous surface sheet body to 0.020 Kpa · s / m or less, the air permeability of the porous surface sheet body is significantly improved. Deterioration of the color of food such as meat on the side in contact with food can be more advantageously prevented.

The drip absorbent mat according to the fourth invention of the present application is the drip absorbent mat according to the second or third invention, wherein the drip absorbent mat itself has a ventilation resistance value in the surface direction by the following test method. In this case, the configuration is 0.2 Kpa · s / m or less.

A drip absorbent mat stack in which a plurality of drip absorbent mats are stacked to form a drip absorbent mat stack, and the drip absorbent mat stack is cut into a cylindrical shape having a diameter of 28 mm and a thickness of 5.0 mm in the stacking direction. On the other hand, ventilation is performed in the surface direction of the drip absorption mat itself.

According to such a configuration, when the airflow resistance value in the surface direction of the drip absorbent mat itself is 0.2 Kpa · s / m or less when the above test method is used, the air permeability is good. Therefore, good air permeability is ensured in both the thickness direction and the surface direction of the drip absorbent mat itself, and the air permeability of the porous surface sheet body is remarkably improved, so that the side in contact with the mat is improved. Deterioration of the color of food such as meat can be prevented more advantageously.

The drip absorbent mat according to the fifth invention of the present application is the drip absorbent mat according to any one of the second to fourth inventions, wherein the absorbent sheet body has a thickness of 0.3 mm to 3.0 mm. It consists of

According to such a configuration, in addition to obtaining the functions and effects of any one of the second to fourth inventions, the thickness of the absorbent sheet body is from 0.3 mm to 3.0 mm. The drip can be absorbed effectively and the mat can be prevented from becoming bulky.

That is, if the thickness of the absorbent sheet body is less than 0.3 mm, the drip absorption capacity becomes insufficient. On the other hand, if the thickness exceeds 3.0 mm, the drip absorption capacity increases, but the mat becomes bulky. However, in the present invention, a drip absorbent mat that can advantageously solve these problems and prevent deterioration of food color can be obtained.

Further, a drip absorbent mat according to the sixth invention of the present application is a drip absorbent mat laid under a food from which blood juice (drip) comes out, the absorbent sheet body for absorbing the drip, and the absorbent sheet body The porous surface sheet body is disposed on the upper side and is in contact with food, and the porous surface sheet body is formed of a thin film having a ridge-and-valley minute unevenness, and a cavity is formed in the convex portion. On the other hand, a minute opening is formed by providing a minute hole in the concave portion.

According to such a configuration, in addition to obtaining the operation and effect of any one of the above inventions, a cavity is formed in the convex portion of the thin film having minute valley-like irregularities, while the concave portion of the thin film is formed. Since a minute opening is formed by providing a minute hole, air existing in the internal space of the convex portion can easily enter the inside of the opening (for the concave portion) through the absorbent sheet body. In addition, since the air in the internal space of the convex portion can easily enter the inside of the opening (for the concave portion), the air can be smoothly routed through the internal space of the convex portion. For this reason, the air permeability is remarkably improved as compared with the case where air penetrates the absorbent sheet body and reaches the inside of the opening, and more advantageously prevents the deterioration of the color of food such as meat on the side contacting the mat. be able to.

Further, the drip absorbent mat according to the seventh invention of the present application is the drip absorbent mat according to the sixth invention, wherein the portion of the porous surface sheet body that is in contact with the absorbent sheet body is jagged. The configuration is such that air from the surface direction can easily flow. Note that the “surface direction” refers to a direction from, for example, the cavity 13c to the outside of the minute opening 13a or from the outside of the minute opening 13a to the cavity 13c in FIGS. 11B and 12. Means that.

According to such a configuration, the air permeability is good in both the surface direction and the thickness direction of the drip absorption mat. That is, even when the drip absorption mat according to the seventh invention is used as a tray mat, and the food that produces blood juice (drip) such as meat or fish is placed on the tray mat, Since the air permeability is also good, air will be sufficiently supplied to the part that contacts the tray mat on the bottom of the food, and if the food is meat, The deterioration of the color at the portion in contact with the tray mat is prevented.

Moreover, the drip absorption mat which concerns on 8th invention of this application is a drip absorption mat which concerns on 6th or 7th invention. WHEREIN: The said opening is a taper-shaped opening which the diameter which contacted the said foodstuff expanded. It is.

According to such a configuration, since the opening has a so-called funnel with respect to the food, the drip can be easily guided to the absorbent sheet body through the opening.

The drip absorbent mat according to the ninth invention of the present application is the drip absorbent mat according to any of the sixth to eighth inventions, wherein the absorbent sheet body and the porous surface sheet body are the porous surface. It is set as the structure mutually bonded in the form which does not block the said opening provided in the sheet | seat body.

According to such a configuration, the absorbent sheet body and the porous surface sheet body are not separated, and handling of the drip absorbent mat is facilitated.

Further, the drip absorbent mat according to the tenth invention of the present application is the drip absorbent mat according to the ninth invention, wherein the adhesion is a dotted or linear adhesion.

According to such a configuration, a drip absorbent mat that is easy to handle can be obtained without reducing the bonding area as much as possible and impairing the texture of the absorbent sheet body and the porous surface sheet body.

Further, according to the drip absorbent mat according to the eleventh invention of the present application, in the drip absorbent mat according to any one of the sixth to tenth inventions, the ridge-and-valley minute minute constituting the porous surface sheet body is provided. The thin film having irregularities is configured such that the proportion of the thin film is 30% or less in the space occupied by the entire porous surface sheet.

According to such a configuration, in the space occupied by the porous surface sheet body, the space without the thin film is increased to a predetermined amount or more. The amount of air to be contacted can be increased.

That is, the porous surface sheet body constituted by the thin film having minute peaks and valleys is composed of the thin film itself and a space portion formed by the irregularities. In this invention, since the ratio of the space portion is 70% or more, the amount of air can be increased.

For this reason, it is possible to advantageously prevent color deterioration of food (meat) on the side in contact with the mat.

In addition, the material cost at the time of manufacturing the thin film can be reduced, and the heat insulation performance of the mat can be improved by the air in the unevenness.

The drip absorbent mat according to the twelfth invention of the present application is the drip absorbent mat according to any of the sixth to eleventh inventions, wherein there are 20 or more apertures per 1 cm ² .

According to such a configuration, the ventilation resistance value of the porous surface sheet can be easily reduced.

The drip absorbent mat according to the thirteenth invention of the present application is the drip absorbent mat according to any one of the sixth to twelfth inventions, wherein the drip absorbent mat has a ventilation resistance value in the surface direction as follows. When the test method is used, the structure is 0.2 Kpa · s / m or less.

According to such a configuration, when the airflow resistance value in the surface direction of the drip absorbent mat itself is 0.2 Kpa · s / m or less when the test method is used, the air permeability is good. Therefore, good air permeability is ensured in both the thickness direction and the surface direction of the drip absorbent mat itself, and the air permeability of the porous surface sheet body is remarkably improved, so that the side in contact with the mat is improved. Deterioration of the color of food such as meat can be prevented more advantageously.

The drip absorbent mat according to the fourteenth invention of the present application is the drip absorbent mat according to any one of the first to thirteenth inventions, wherein the drip absorbent mat is placed with food from which blood juice (drip) is produced. The tray mat is laid on the mounting surface of the tray.

According to such a configuration, deterioration of the color of the back surface of the food (meat) placed on the tray can be prevented.

As described above, according to the present invention, when a food such as meat is placed, a drip absorption mat can be obtained in which deterioration of the color of the food (meat) on the side in contact with the mat is prevented.

It is a figure which shows the structure of the tray mat which concerns on this embodiment, and is the figure which showed the top view of the tray mat which concerns on this embodiment. It is a figure which shows the structure of the tray mat which concerns on this embodiment, and is the figure which showed the side view of the tray mat which concerns on this embodiment. It is a figure which shows the structure of the tray mat which concerns on this embodiment, and is the figure which showed the upper surface perspective view which saw through the surface sheet of the tray mat which concerns on this embodiment. It is a figure which shows the structure of the tray mat which concerns on this embodiment, and is the figure which showed the perspective view which shows what peeled off the surface sheet of the tray mat which concerns on this embodiment. It is a figure for demonstrating in detail the function of the tray mat which concerns on this embodiment, and is the figure which showed one process of adhere | attaching an absorbent sheet body and a surface sheet, and manufacturing a tray mat. It is a figure for demonstrating in detail the function of the tray mat which concerns on this embodiment, and is the expanded end elevation which expanded a part of cross section of the surface sheet. It is a figure for demonstrating in detail the function of the tray mat which concerns on this embodiment, and is the expanded perspective view for demonstrating the shape of the opening of a surface sheet. It is a figure for demonstrating in detail the function of the tray mat which concerns on this embodiment, and is an enlarged perspective view which notched a part of opening in order to demonstrate the shape of the opening of a surface sheet. It is a figure for demonstrating in detail the function of the tray mat which concerns on this embodiment, the figure (FIG. 9 (A)) which looked at the surface sheet which is not adhere | attached from the table | surface (FIG. 9 (A)), and the figure (FIG. B)). It is a block diagram which shows the shield cross section of the drip absorption mat which concerns on suitable embodiment of this invention. It is a figure for demonstrating that the drip absorption mat which concerns on this embodiment makes air permeability favorable, FIG. 11 (A) is a function structure of the tray mat which concerns on a prior art (Unexamined-Japanese-Patent No. 9-86569). FIG. 11B is a block diagram showing a functional configuration of the drip absorbent mat according to the present embodiment. It is the flowchart which showed an example of the formation method of the jagged end 13d. It is a figure for demonstrating the test method for measuring the ventilation resistance value in the surface direction of the drip absorption mat which concerns on embodiment of this invention. It is a figure which shows the state by which the drip absorption mat which concerns on this embodiment was used as a tray mat. It is the figure which made the graph the change of the chromaticity a value of the comparative example 2, and the change of the chromaticity a value of Example 4. FIG.

Explanation of symbols

10 tray mat 11 absorbent sheet body 13 surface sheet (porous surface sheet body)
13a Opening 14 Adhesive part 13b Convex part 13c Cavity 13d End of the surface sheet contacting the absorbent sheet 21 Drip absorbent mat stack 23 Tray 24 Food F Thickness of the thin film constituting the surface sheet T Depth of the aperture 13a The apparent thickness of the top sheet 13 R The rib width between the apertures 13a Hb The aperture diameter on the contact surface side with the absorbent sheet body Ha The aperture diameter on the contact surface side with the food P The aperture pitch A Large Apertures, apertures related to apparent aperture rate B Small apertures, apertures related to substantial aperture rate

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, a preferred embodiment when the drip absorption mat according to the present invention is used as a tray mat will be described with reference to the drawings. 1 to 4 are views showing a configuration of a tray mat according to the present embodiment. FIG. 1 is a top view, FIG. 2 is a side view, and FIG. 3 is a top perspective view seen through a porous surface sheet. FIG. 4 is a perspective view showing the porous surface sheet body partially peeled off.

As shown in FIGS. 1, 2, and 4, the tray mat 10 according to this embodiment includes a porous surface sheet (porous surface sheet body) 13 on the surface of a liquid absorbent absorbent sheet body 11. It is constituted by being covered.

In the present embodiment, the liquid-absorbing absorbent sheet 11 is composed of a nonwoven fabric and can absorb blood juice (drip) from food. On the other hand, the surface sheet 13 consists of a porous resin film. According to such a tray mat 10 according to the present embodiment, blood juice (drip) from food is absorbed by the absorbent sheet body 11 through the opening 13 a of the top sheet 13. In this case, since the surface sheet 13 has a small contact area with the meat, no drip remains on the surface, and the meat placed on the tray mat 10 is completely separated from the drip. It is possible to prevent the progress of food damage caused by.

Further, in the tray mat 10 according to the present embodiment, the airflow resistance value of the tray mat 10 itself can be adjusted by adjusting the size and density of the openings 13a of the porous topsheet 13 and the thickness of the absorbent sheet body 11. It is set to be 1.00 Kpa · s / m or less. For this reason, when the tray mat 10 according to the present embodiment is used, reduced myoglobin contained in the meat placed on the tray mat 10 passes through oxymyoglobin due to its good air permeability. It will be changed to myoglobin, and the browning of meat due to metmyoglobin formation will be delayed, and even when placed on the tray for a long time, the progress of browning of the meat at the contact area with the tray mat is sufficiently suppressed It will be.

Here, in order to ensure the air permeability as described above, in the tray mat 10 according to the present embodiment, the air flow resistance value of the top sheet 13 is set to 0.020 Kpa · s / m or less. . Further, the absorbent sheet body 11 made of nonwoven fabric has a thickness of between 0.3 mm and 3.0 mm, preferably between 0.5 mm and 2.0 mm, more preferably 0.75 mm. To 1.5 mm. In addition to this, in the tray mat 10 according to the present embodiment, in order to ensure air permeability, the density of the openings 13a of the topsheet 13 is configured to be 20 pieces / cm ² or more, The absorbent sheet body 11 and the top sheet 13 are bonded together by bonding portions 14 that are scattered over the entire surface of the absorbent sheet body 11. In this embodiment, the bonding at the bonding portion 14 is performed by a hot melt adhesive.

5 to 9 are diagrams for explaining the function of the tray mat 10 according to the present embodiment in more detail.

First, as shown in FIG. 5, the tray mat 10 according to the present embodiment is formed by partially bonding a porous topsheet 13 having an opening 13 a and an absorbent sheet body 11. In such a tray mat 10, the top sheet 13 is made of a thin film (film) having a mountain-and-valley minute irregularity, and the minute hole 12 is provided in the concave part, thereby forming a minute tapered shape. An opening 13a is formed.

And as FIG. 6 shows, the cross section of the opening 13a makes a taper shape, and the cavity 13c is formed in the convex-shaped part 13b. Here, by adopting such a configuration, the weight of the entire tray mat 10 can be reduced, and air existing in the cavity 13c can easily enter the inside of the opening 13a through the minute holes 12. Become.

In this embodiment, the thickness F of the thin film (film) constituting the top sheet 13 is 0.005 mm to 0.1 mm, but the depth T of the opening 13a is 0.02 mm to 1.0 mm. , T is the apparent thickness as it is, so the apparent thickness of the top sheet 13 of the tray mat 10 according to this embodiment is 0.02 mm to 1.0 mm. In the space occupied by the entire surface sheet 13 (porous surface sheet body), the proportion of the thin film (film) is preferably 30% or less, and more preferably 10% or less.

In addition, in this embodiment, the rib width R between the apertures 13a is 1 mm or less, and the aperture diameter of the aperture 13a is 2.0 mm. The opening diameter Ha on the contact surface side with the food is 5.0 mm or less.

The details of these parameters and related parameters are as follows.

First, as the surface sheet 13, a thin film (film) having an aperture is preferably used. The aperture diameter is 5.0 mm or less, more preferably about 0.1 to 2.0 mm. . In this regard, if the opening 13a is too large, drip absorbed by the absorbent sheet body 11 from the opening portion will be visually recognized. On the other hand, if the aperture is too small, it becomes difficult for the drip to be absorbed by the absorbent sheet body 11 through the aperture 13a.

The opening diameter is preferably larger on the contact surface side with the food than on the contact surface side with the absorbent sheet body 11. By doing in this way, a drip is easy to transfer to the absorption sheet body 11 side through the opening 13a, and it becomes difficult to reverse. Furthermore, since the hole diameter is small, the drip can be hardly seen from the surface.

The density of the apertures 13a is preferably 20 or more, more preferably 200 or more per 1 cm ² . By arranging the numerous openings 13a evenly, the meat comes into contact with the air without unevenness.

The opening pitch P is preferably 0.1 to 2.0 mm, and the rib width R is preferably 0.01 to 2.0 mm. In particular, the rib width R is more preferably 1.0 mm or less. When the rib width R is small, the contact area between the meat and the film can be reduced, so that the meat can be evenly touched with air.

The opening ratio is 30 to 99%, preferably 50 to 90%, more preferably 60 to 80% on the contact surface side with food. On the contact surface side with the absorbent sheet body 11, it is 1 to 60%, preferably 15 to 22%. In addition, as shown in FIG. 7, the opening ratio on the contact surface side with the food is related to the large opening A (opening diameter Ha), which is “when the tray mat 10 is viewed from above”. It will constitute the “apparent hole area ratio” (FIG. 9A). On the other hand, the aperture ratio on the contact surface side with the absorbent sheet body 11 relates to a small aperture B (opening diameter Hb), which constitutes the “substantial aperture ratio” of the tray mat 10. (FIG. 9B). In the present invention, the substantial aperture ratio is set smaller than the apparent aperture ratio (see FIGS. 9A and 9B).

That is, in the drip absorbent mat according to a preferred embodiment of the present invention, the size of the hole vacant on the side in contact with the absorbent sheet body 11 is smaller than the size of the hole vacant on the side in contact with food. This reduces the contact area between the meat and the tray mat and increases the contact area between the meat and the air, and in combination with the improved air permeability as described above, the color of the back side of the meat that contacts the mat This is to prevent the deterioration.

The drip absorbent mat according to a preferred embodiment of the present invention is considered so that air permeability in the surface direction is good in addition to the above configuration. This will be described below.

First, FIG. 10 is a block diagram showing a shield cross section of a drip absorption mat according to a preferred embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the component same as the component shown in FIG. 6, and the description is abbreviate | omitted.

As shown in FIG. 10, the drip absorbent mat according to a preferred embodiment of the present invention is configured to have good air permeability in both the surface direction X and the thickness direction Y.

Here, regarding the drip absorption mat according to the present embodiment, the air permeability of the absorbent sheet body 11 is improved by adjusting the material of the constituent member, its density or thickness, basis weight, etc. . Further, in addition to this, a device for improving air permeability is also made in the structural aspect, and this will be described below.

First, in the tray mat according to the prior art (Japanese Patent Laid-Open No. 9-86569) shown in FIG. 11A, the configuration of a net (corresponding to the surface sheet 13 of this embodiment) pasted on the surface of the tray mat. Since the member 20 is bulky, the air that has entered from the surface direction of the absorbent sheet body 11 passes under the bulky mesh member 20 as indicated by the solid arrows in FIG. Then, it goes out from the mesh portion of the mesh body (corresponding to the opening 13a of this embodiment).

On the other hand, in the drip absorption mat according to the present embodiment, as shown by the solid line arrow in FIG. 11 (B), the air that has entered from the surface direction of the absorbent sheet body 11 is the convex portion 13b. Passing through the cavity 13c formed on the inside of the top sheet 13, the top sheet 13 exits from the opening 13a.

As is clear from the comparison of the air passage paths shown in FIGS. 11A and 11B, the conventional technique shown in FIG. As much as possible, the air permeability is inferior. As described above, in the drip absorption mat according to the present embodiment, the porous surface sheet body 13 is made of a thin film having a minute valley-like unevenness, and the cavity 13c is formed in the protruding portion 13b. Since the minute hole 13a is formed in the concave portion by providing the minute hole, the air permeability in the surface direction is improved.

Further, in the drip absorbent mat according to the present embodiment, the portion of the end sheet 13d of the surface sheet 13 that contacts the absorbent sheet body 11 is intentionally formed in a jagged shape so that the surface direction (a small opening from the cavity 13c is formed). Air from the outside of 13a or from the outside of the minute aperture 13a to the cavity 13c). For example, as shown in FIG. 12, after shaping a trapezoidal shape by blow molding or the like (A), the bottom portion is expanded while being heated ((B) → Step (C)), and finally rupturing (D), a jagged end 13d can be formed.

By the way, the air permeability in the surface direction of the drip absorbent mat itself is adjusted by adjusting the material of the constituent member, its density or thickness, basis weight, etc., in addition to the above-described structural improvements. Whether or not the air permeability in the direction is good is confirmed by the following test method, and in the drip absorbent mat according to the embodiment of the present invention, when the test method is as follows, Adjustment is performed so that the airflow resistance value in the surface direction of the absorbent mat itself is 0.2 Kpa · s / m or less.

First, a plurality of drip absorbent mats are stacked to form a drip absorbent mat stack 21, and the drip absorbent mat stack 21 is cut into a cylindrical shape having a diameter of 28 mm and a thickness of 5.0 mm as shown in FIG. The air permeability of the drip absorbent mat stack 21 cut into the columnar shape is measured so as to vent the surface of the drip absorbent mat itself.

By doing so, as shown in FIG. 14, the drip absorption mat according to the present embodiment is used as the tray mat 10, laid as the tray mat 10 on the tray 23, such as meat and fish on it. Even when the food 24 from which such blood juice (drip) comes out is placed, the air permeability in the surface direction is good, so that there is sufficient air in the portion that contacts the tray mat 10 on the bottom surface of the food 24 If the food 24 is meat, the color deterioration at the portion of the bottom surface of the food 24 in contact with the tray mat 10 is prevented.

Here, the resin configuration of the thin film (film) can be appropriately selected from polyolefins such as polyethylene and polypropylene, synthetic resins such as polyethylene, filler resins, and the like. An activator and a pigment may be added to the resin. For example, by mixing TiO ₂ , the film becomes opaque, so that the concealability is improved and it is difficult to visually recognize the drip absorbed from the surface side.

The material constituting the absorbent sheet 11 can be appropriately selected from nonwoven fabrics such as air-laid nonwoven fabric and thermal bond nonwoven fabric, paper, urethane, and the like. Specifically, the absorbent sheet body 11 can be composed of air-laid pulp having a basis weight of 60 g / m ² and a thickness of 1.1 mm, in addition to those shown in the above embodiment. The weight per unit area and thickness are within the range where the airflow resistance value that the tray mat 10 itself should have is 1.00 Kpa · s / m or less so that drip oozed from food can be sufficiently absorbed. It is determined. Regarding airlaid pulp, the basis weight is 10 to 120 g / m ² , and the thickness is preferably about 0.3 to 3 mm, more preferably about 0.5 to 2 mm.

The surface sheet 13 and the absorbent sheet body 11 can be bonded 14 by a method that can be appropriately selected by those skilled in the art, for example, bonding with an adhesive, thermal bonding, bonding with sonic, or the like. In order not to impair the absorbability and air permeability of the tray mat 10, the adhesive 14 is used for that purpose by opening 13 a of the top sheet 13, particularly on the side in contact with the absorbent sheet body 11 (the contact surface side with the absorbent sheet body 11) ) In the opening 12 (that is, the opening in the direction of B in FIG. 7), and the substantial opening ratio should not be changed before and after bonding. Specifically, the surface sheet 13 and the absorbent sheet body 11 are bonded to each other by spraying a 3.0 g / m ² hot melt adhesive. At this time, if the hot melt adhesive is sprayed to a thickness of 0.3 mm or less, the opening 14 on the absorbent sheet body 11 side of the topsheet 13 is not completely blocked.

The drip absorbent mat according to the present invention is not limited to the use as a tray mat, but can be used as a general drip absorbent mat that is laid under a food product from which blood juice (drip) comes out.

A test piece was collected from the same piece of meat, and the chromaticity a value of the test piece immediately after cutting was measured. Next, a test piece is placed on each tray mat 10, and after 5 hours, 24 hours, 48 hours, 96 hours, and 144 hours have elapsed, the chromaticity a value on the tray mat 10 contact surface side of the test piece, Was measured.

The chromaticity a value was measured using a color difference meter (trade name “CR-300” manufactured by Minolta Co., Ltd.) in accordance with the D-0 method defined in JIS Z8722. During measurement, the measurement sample was illuminated from all directions, and reflected light in the vertical direction was received with respect to the measurement material. The measurement diameter was 8.0 mm, and the value of chromaticity a value in the red-green direction was taken.

The airflow resistance values of the thin films (films) having the aperture ratios shown in Table 1 were measured to be Examples 1 to 4, Comparative Example 1 and Comparative Example 2, respectively. The deterioration of meat color when used as 13 was measured. The results are shown in Table 1.

The airflow resistance value was measured using an Automatic Air-Permeability Tester (product name “KES-F8-AP1”, manufactured by Kato Tech Co., Ltd.), and a constant flow rate of air flow to the tray mat 10 or the top sheet 13 was 4 cc / It was passed through at a rate of cm ² · sec (area: 2π × 10 ⁻⁴ m ² ), and released and sucked. And the pressure loss of 3 seconds of exhaust and 3 seconds of intake was measured using the semiconductor differential pressure gauge, and the integral value was obtained.

FIG. 15 shows changes in the chromaticity a value of Comparative Example 2 and changes in the chromaticity a value of Example 1. As is apparent from Table 1 and FIG. 15, when the tray mat 10 according to the present invention is used, a good state of meat color is maintained for a relatively long time.

Claims

A drip absorbent mat that is laid under the food from which blood juice (drip) comes out,
An absorbent sheet body that absorbs the drip, and a porous surface sheet body that is disposed on the upper side of the absorbent sheet body and is in contact with food,
The porous surface sheet body is formed of a thin film having a ridge-and-valley minute unevenness, and a cavity is formed in the convex part, while a minute hole is provided in the concave part. An opening is formed,
The aperture is a tapered aperture having an aperture diameter of 5.0 mm or less at the contact surface with the food and an aperture diameter of 2.0 mm or less at the contact surface with the absorbent sheet body. Drip absorption mat characterized by.
2. The drip absorbent mat according to claim 1, wherein an opening ratio at a contact surface with the food is 30% to 99%.
The drip absorbent mat according to claim 1 or 2, wherein a hole area ratio on a contact surface with the absorbent sheet body is 1% to 60%.
The thin film having minute peaks and valleys constituting the porous surface sheet has a ratio of the thin film of 30% or less in the space occupied by the entire porous surface sheet. Item 4. The drip absorption mat according to any one of Items 1 to 3.
The drip absorbent mat according to any one of claims 1 to 4, wherein 20 or more holes are present per 1 cm 2 .