WO2022199099A1

WO2022199099A1 - Food tray having film and small holes for permeation and isolation

Info

Publication number: WO2022199099A1
Application number: PCT/CN2021/133581
Authority: WO
Inventors: 任军斌; 马超; 周金源; 罗丹峰
Original assignee: 新天力科技股份有限公司
Priority date: 2021-03-26
Filing date: 2021-11-26
Publication date: 2022-09-29
Also published as: CN113264272A

Abstract

The present invention relates to a food tray having a film and small holes for permeation and isolation, comprising a tray body. A bloody water collection groove is formed in the bottom of the tray body. A punched water absorption pad is provided to seal the opening of the bloody water collection groove. The punched water absorption pad is of a multilayer structure, the upper layer thereof is a waterproof punched film, and the lower layer thereof is a water absorption material layer. The waterproof punched film and the water absorption material layer are compounded together one above the other. According to the present invention, the isolation of bloody water from foods is achieved, the water storage space at the bottom of the tray is large, and the punched water absorption pad is fixed by means of ultrasonic welding so as not to be turned over during transportation, and thus can effectively prevent the bloody water from overflow, and prevent the bloody water from direct contact with foods, such as meat products, thereby avoiding long-time soaking. Therefore, the storage life of the foods, such as meat products, can be prolonged.

Description

A food tray with permeation and isolation of small holes in film

technical field

The invention relates to a food tray, in particular to a food tray with thin film pores infiltrated and isolated.

Background technique

Food trays are generally used to place meat and seafood food. For example, food such as meat will inevitably seep out during the storage process of the tray and accumulate at the bottom of the tray. The lower part of this food is soaked in the tray for a long time. There will be problems such as discoloration and deterioration in the liquid; in order to solve this problem, the usual practice is to design the bottom of the tray to be uneven, so that when there is liquid seepage, the liquid will remain in the groove. The surface of the food is separated from the liquid, but it cannot fundamentally solve the problem. Since most of the food surfaces are relatively soft, some of the food's surface will sink into the groove according to the structure of the groove, and some of the food will eventually be immersed in the liquid; there are also some trays that directly Put a layer of absorbent paper on the bottom of the food. The absorbent paper can absorb the blood and water that seeps out of the food. At the same time, the moisture inside the part where the bottom of the food is in contact with the absorbent paper will also be absorbed by the absorbent paper, making the surface of the food discolored due to lack of water, affecting the food. quality and look.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a food tray with thin film pores infiltrated and isolated. The tray is provided with a blood water collection tank at the bottom, and the blood water collection tank is closed by a punching water absorption pad. The perforated absorbent pad realizes the isolation of blood and food. The bottom of the tray has a large water storage space. The punched absorbent pad is fixed by ultrasonic welding. The absorbent pad will not be turned over during transportation, which can effectively prevent the blood from overflowing and prevent the blood from directly contacting food such as meat products. Thereby preventing long-term soaking and prolonging the shelf life of foods such as meat.

In order to achieve the above purpose, the following technical solutions are adopted:

A food tray with thin film pores infiltrated and isolated, comprising a box body, characterized in that: a blood water collection tank is arranged at the bottom of the box body, and a punched water absorption pad closes the notch of the blood water collection tank, and the punched water collection tank is The water-absorbing pad has a multi-layer structure, the uppermost layer is a water-proof punching film, the lower layer of the water-absorbing punching film is a water-absorbing material layer, and the water-absorbing punching film and the water-absorbing material layer are compounded together up and down.

The blood water collecting tank is provided with a membrane supporting rib, which is supported on the bottom surface of the punching water-absorbing pad to prevent the middle of the punching water-absorbing pad from sinking downward.

The blood water collection tank 11 is rectangular, the film support ribs include a rectangular outer frame 12 and a number of T-shaped support ribs 13 in the outer frame, and an annular groove 14 is formed between the outer frame 12 and the inner wall of the blood water collection tank. , the T-shaped support rib position 13 includes transverse rib and longitudinal rib that are perpendicular to each other, one end of the longitudinal rib is connected to the middle of the transverse rib, the other end of the longitudinal rib is connected to the transverse part of the rectangular outer frame 2, and the longitudinal rib is connected with the rectangular outer frame 2. The transverse portions are perpendicular to each other, and several of the T-shaped support ribs 13 are divided into two groups. The longitudinal ribs of the two groups of T-shaped support ribs 13 are respectively connected with the two transverse portions of the rectangular outer frame 2, and the two groups of T-shaped support ribs are connected. The positions 13 are staggered with each other and form an arcuate flow channel 15 in the outer frame 12 .

A plurality of longitudinal protruding strips are arranged on the side wall of the box body, and longitudinal guide grooves are formed between adjacent longitudinal protruding strips.

A connecting groove is also provided on the edge of the blood water collecting tank; the edge of the punching water absorbing pad is welded at the connecting groove by ultrasonic waves.

The depth of the connecting groove is greater than or equal to the thickness of the punching pad. When the punching pad is welded at the connecting groove, the top surface of the punching pad is slightly lower than the bottom surface of the box or flush with the bottom surface of the box.

The punching water-absorbing pad has a three-layer structure, the middle is a water-absorbing material layer, and the upper and lower sides of the water-absorbing material layer are compounded with water-proof punching films.

The perforated membrane is PE perforated membrane; the permeable hole diameter of the PE perforated membrane is 1-2mm, and the center distance of adjacent permeable holes is 4-6mm.

The water-absorbing material layer is a wood fiber layer, a water-absorbing bead layer or a water-absorbing cotton layer.

The said membrane supporting rib divides the blood water collecting tank into several small chambers, and the small chambers communicate with each other.

In the present invention, a blood water collection tank is arranged at the bottom of the box body, and the blood water collection tank occupies a larger part of the bottom of the box body, so that the bottom has a large water storage space. , Because the water has tension, if only the upper punching layer can pass through the small punching holes smoothly, only the lower water-absorbing layer actively absorbs the water in the upper layer, which will generate suction and continuously absorb the water generated above. At the same time, the water-proof punching film isolates the food and the water-absorbing material layer to prevent the water-absorbing material layer from absorbing the moisture on the surface of the food; the bottom annular groove structure can effectively prevent blood and water from flowing out when the tray is tilted, dumping the tray, and the water-absorbing pad It will not fall, and the blood water that penetrates into the bottom of the tray will not flow out, preventing direct contact between blood water and meat and other foods, preventing long-term soaking, and extending the shelf life of meat.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the exploded structure schematic diagram of the present invention;

Fig. 3 is the top view structure schematic diagram of the present invention;

Fig. 4 is A-A sectional view in Fig. 3;

Fig. 5 is the structural representation of the optimal box of the present invention;

Fig. 6 is the enlarged schematic diagram at B in Fig. 4;

Fig. 7 is the structural representation of the box body of Comparative Scheme 1 of the present invention;

Fig. 8 is the structural representation of the box body of Comparative Scheme 2 of the present invention;

Fig. 9 is the structural representation of the box body of Comparative Scheme 3 of the present invention;

Fig. 10 is the structural representation of the box of Comparative Scheme 4 of the present invention;

Fig. 11 is the structural representation of the box body of Comparative Scheme 5 of the present invention;

Fig. 12 is the structural representation of the box body of Comparative Scheme 6 of the present invention;

Fig. 13 is the structural representation of the box body of the comparative scheme 7 of the present invention;

Fig. 14 is the structural representation of the box body of the comparative scheme 8 of the present invention;

Fig. 15 is the structural representation of the box body of Comparative Scheme 9 of the present invention;

Fig. 16 is the structural representation of the box body of the comparative scheme 10 of the present invention;

Fig. 17 is the structural representation of the box body of the comparative scheme 11 of the present invention;

Fig. 18 is the structural representation of the box body of the comparative scheme 12 of the present invention;

Fig. 19 is the structural representation of the box body of the comparative scheme 13 of the present invention;

Fig. 20 is the structural representation of the box body of the comparative scheme 14 of the present invention;

Fig. 21 is the structural representation of the box body of the comparative scheme 15 of the present invention;

FIG. 22 is a schematic structural diagram of the box body of Comparative Scheme 16 of the present invention.

Detailed ways

As shown in Figures 1-6, a food tray with permeation and isolation of film pores includes a box body 1, and a plurality of longitudinal ridges 17 are arranged on the inner side wall of the box body 1, and between adjacent longitudinal ridges 17 A longitudinal guide groove 18 is formed; the blood water collecting groove 11 provided at the bottom of the box body 1 has a punched water absorbing pad 2 to close the notch of the blood water collecting groove 11, and a connection is also provided at the edge of the blood water collecting groove 11 Groove 19; the edge of the punching water-absorbing pad 2 is welded at the connecting groove 19 by ultrasonic waves; the depth of the connecting groove 18 is greater than or equal to the thickness of the punching water-absorbing pad 2, and the punching water-absorbing pad 2 is welded to the connecting groove The top surface of the punching absorbent pad 2 is slightly lower than the bottom surface of the box body or flush with the bottom surface of the box body, which is conducive to the drainage of blood and water from the food to the punching absorbent pad 2.

The punching pad 2 is a multi-layer structure, the uppermost layer is a water-proof punching film 21, the lower layer of the water-proof punching film 21 is a water-absorbing material layer 22, and the water-proof punching film 21 and the water-absorbing material layer 22 are composited up and down. At the same time, a layer of water-proof punching film 21 can be compounded under the water-absorbing material layer 22 according to actual needs; the water-proof punching film 21 is a PE punching film; the water-permeable hole diameter of the PE punching film is 1-2mm. , the center distance of adjacent permeable holes is 4-6mm.

The blood-water collecting tank 11 is provided with a membrane supporting rib, which is supported on the bottom surface of the punching water-absorbing pad 2 to prevent the middle of the punching water-absorbing pad 2 from sinking downward.

The blood water collection tank 11 is rectangular, the film support ribs include a rectangular outer frame 12 and a number of T-shaped support ribs 13 in the outer frame, and an annular groove 14 is formed between the outer frame 12 and the inner wall of the blood water collection tank. , the T-shaped support rib position 13 includes transverse rib and longitudinal rib that are perpendicular to each other, one end of the longitudinal rib is connected to the middle of the transverse rib, the other end of the longitudinal rib is connected to the transverse part of the rectangular outer frame 2, and the longitudinal rib is connected with the rectangular outer frame 2. The transverse portions are perpendicular to each other, and several of the T-shaped support ribs 13 are divided into two groups. The longitudinal ribs of the two groups of T-shaped support ribs 13 are respectively connected with the two transverse portions of the rectangular outer frame 2, and the two groups of T-shaped support ribs are connected. The positions 13 are mutually displaced and form an arcuate flow channel 15 in the outer frame 12. Two notches 16 are opened in the middle of the longitudinal portion of the outer frame 12. The notches 16 communicate with the annular groove 14 and the arcuate flow channel 15; T-shaped support ribs 13 The staggered arrangement makes the perforated water-absorbing pad 2 support evenly, and at the same time, an arcuate flow channel 15 is formed inside, and the annular groove 14 and the arcuate flow channel 15 are connected through the notch 16, so that the internal space of the blood water collection tank 11 is connected, so as to prevent the local space from being full of blood water. Spill occurs.

In the present invention, a plurality of longitudinal protruding strips 17 are arranged on the inner side wall of the box body 1, and longitudinal guiding grooves 18 are formed between adjacent longitudinal protruding strips 17.

The blood water collection tank at the bottom of the box body reduces the entry space for contact with the food; the blood water collection tank occupies a larger part of the bottom of the box body, so that the bottom has a large water storage space, and the upper layer of the punching water absorption pad is in contact with the food. There is a punching layer , The bottom is the water-absorbing material layer, because the water has tension, if only the upper punching layer can pass through the small punching holes smoothly, only the lower water-absorbing layer actively absorbs the water in the upper layer, will it generate suction and remove the water generated above. It is continuously absorbed, and at the same time, the water-proof punching film acts to isolate the food and the water-absorbing material layer, so as to prevent the water-absorbing material layer from directly contacting the food surface layer to absorb the moisture on the food surface.

The present invention also conducts a selection test on the aperture size and center distance of the water-proof punching film 21 of the punching water-absorbing pad 2:

In this test, the size of the perforated absorbent pad 2 is uniformly 160mm*70mm, and the water absorption is 30ml; the products used in the test process are all products after ultrasonic heat sealing.

1. When the center distance is 6mm, test the water absorption capacity and water locking capacity according to the size of the aperture:

1.1. The hole diameter is Φ1mm, pour 30ml of water, and the time for water absorption is 35 seconds. After absorbing water, place it at a lateral inclination of 60° for 1 hour, and no water seeps out on the surface.

1.2. The hole diameter is Φ1.5mm, and 30ml of water is poured into it. The water absorption time is 32 seconds. After absorbing water, place it at a 60° lateral inclination for 1 hour, and no water seeps out on the surface.

1.3. The hole diameter is Φ2mm, pour 30ml of water, and the time for water absorption is 28 seconds. After water absorption, place it for 1 hour at a lateral inclination of 60°, and water seeps out on the surface.

It can be known from the above three tests that when the pore size is 1.5 mm, the water absorption speed is fast and water seepage can be prevented.

2. In the case of a hole diameter of 1.5mm, test the water absorption capacity for the center distance:

2.1. The center distance is 4mm, 30ml of water is poured, and the water absorption time is 27 seconds.

2.2. The center distance is 5mm, pour 30ml of water, and the water absorption time is 30 seconds.

2.3. The center distance is 6mm, pour 30ml of water, and the time for absorbing water is 32 seconds.

2.4. The center distance is 7mm, pour 30ml of water, and the time for water absorption is 38 seconds.

It can be seen from the above 4 tests that when the center distance is larger, the water absorption time will be longer, but if the center distance is too dense, the water absorption of the punching absorbent pad 2 will be too strong, and the surface of the food will not be used for moisturizing.

Therefore, to sum up the above test, we recommend choosing a diameter of 1-2mm, of which 1.5mm is the best solution, and the center distance is 4-6mm is the best choice.

In addition, the present invention is tested with different materials and different structures in the punched absorbent pad structure:

The water absorption capacity of the punched absorbent pads selected in the experiment is uniformly 30ml, the surface aperture is 1.5mm, and the center distance is 5mm; the products used in the test process are all products after ultrasonic heat sealing.

1. Material: PE perforated film + absorbent beads + PE perforated film

Pour in 30ml of water, after 1 minute, no water remains on the surface; place it at 60° for 1 hour, and no water seeps out on the surface.

Pour 40ml of water, after 1 minute, there is still water remaining on the surface, and no water enters the groove of the tray; 1 hour later, there is still water remaining on the surface, and no water enters the groove of the tray.

2. Material: wood fiber + PE perforated film

Pour in 30ml of water, after 1 minute, no water remains on the surface, no water enters the groove of the tray, tilt 60° for 1 hour, and no water seeps out on the surface.

Pour 40ml of water, after 1 minute, no water remains on the surface, water enters the groove of the tray, tilt it at 60° for 1 hour, and no water seeps out on the surface.

3. Material: PE perforated film + absorbent cotton + PE perforated film

4. Material: PE perforated film + absorbent beads + PE perforated film

It can be known from the above test that the water absorption capacity of the four punching absorbent pads in 1.2.3.4 is within the water absorption range.

FIG. 5 shows the optimal solution obtained by the inventor through the inclined water seepage test on various membrane support rib structures.

In the inclined water seepage test of the present invention, the water absorption capacity of the water absorbing pads used is uniformly 30ml, and the trays selected in the test are uniformly the products after ultrasonic heat sealing the water absorbing pads.

Option 1: As shown in Figure 7

Take 2 pieces of this product, pour 40ml of water, and wait for 10 minutes.

There are no obvious visible water droplets on the surface of the absorbent pad, which shows that the bottom of the shape has a water storage function.

①The horizontal inclination is 45° and placed for 1 hour, there is water seepage, and the seepage amount is 6.86ml;

②It was placed at a 60° lateral inclination for 1 hour, and there was water seepage, and the amount of seepage was 8.33ml.

Option 2: As shown in Figure 8

Take 2 pieces of this product, pour 40ml of water, and wait for 10 minutes.

①The horizontal inclination is 45° and placed for 1 hour, there is water seepage, and the seepage amount is 4.15ml;

②It was placed at a 60° lateral inclination for 1 hour, and there was water seepage, and the amount of seepage was 5.66ml.

Option 3: As shown in Figure 9

Take 2 pieces of this product, pour 40ml of water, and wait for 10 minutes.

①The horizontal inclination is 45° and placed for 1 hour, there is water seepage, and the seepage amount is 1.26ml;

②It was placed at a 60° lateral inclination for 1 hour, and there was water seepage, and the amount of seepage was 2.24ml.

Option 4: As shown in Figure 10

Take 2 pieces of this product, pour 40ml of water, and wait for 10 minutes.

①The horizontal inclination is 45° and placed for 1 hour, there is water seepage, and the seepage amount is 3.62ml;

②It was placed at a 60° lateral inclination for 1 hour, and there was water seepage, and the amount of seepage was 5.22ml.

Option 5: As shown in Figure 11

Take 2 pieces of this product, pour 40ml of water, and wait for 10 minutes.

①The horizontal inclination is 45° and placed for 1 hour, there is water seepage, and the seepage amount is 6.82ml;

②It was placed at a 60° lateral inclination for 1 hour, and there was water seepage, and the amount of seepage was 9.53ml.

Option 6: As shown in Figure 12

Take 2 pieces of this product, pour 40ml of water, and wait for 10 minutes.

①The horizontal inclination is 45° and placed for 1 hour, there is water seepage, and the seepage amount is 4.22ml;

②It was placed at a 60° lateral inclination for 1 hour, and there was water seepage, and the amount of seepage was 6.76ml.

Option 7: As shown in Figure 13

Take 2 pieces of this product, pour 40ml of water, and wait for 10 minutes.

①The horizontal inclination is 45° and placed for 1 hour, there is water seepage, and the seepage amount is 2.11ml;

②It was placed at 60° horizontally for 1 hour, and there was water seepage, and the amount of seepage was 4.55ml.

Option 8: As shown in Figure 14

Take 2 pieces of this product, pour 40ml of water, and wait for 10 minutes.

①The horizontal inclination is 45° and placed for 1 hour, there is water seepage, and the seepage amount is 2.04ml;

②It was placed at a 60° lateral inclination for 1 hour, and there was water seepage, and the amount of seepage was 4.23ml.

Option 9: As shown in Figure 15

Take 2 pieces of this product, pour 40ml of water, and wait for 10 minutes.

①The horizontal inclination is 45° and placed for 1 hour, there is water seepage, and the seepage amount is 6.47ml;

②It was placed at a 60° lateral inclination for 1 hour, and there was water seepage, and the amount of seepage was 8.85ml.

Option 10: As shown in Figure 16

Take 2 pieces of this product, pour 40ml of water, and wait for 10 minutes.

①The horizontal inclination is 45° and placed for 1 hour, there is water seepage, and the seepage amount is 2.25ml;

②It was placed at a 60° lateral inclination for 1 hour, and there was water seepage, and the amount of seepage was 3.56ml.

Scheme 11: As shown in Figure 17

Take 2 pieces of this product, pour 40ml of water, and wait for 10 minutes.

①The horizontal inclination is 45° and placed for 1 hour, there is water seepage, and the seepage amount is 8.62ml;

②It was placed at a 60° lateral inclination for 1 hour, and there was water seepage, and the amount of seepage was 11.41ml.

Scheme 12: As shown in Figure 18

Take 2 pieces of this product, pour 40ml of water, and wait for 10 minutes.

①The horizontal inclination is 45° and placed for 1 hour, there is water seepage, and the seepage amount is 5.23ml;

②It was placed at a 60° lateral inclination for 1 hour, and there was water seepage, and the amount of seepage was 8.65ml.

Scheme 13: As shown in Figure 19

Take 2 pieces of this product, pour 40ml of water, and wait for 10 minutes.

①The horizontal inclination is 45° and placed for 1 hour, there is water seepage, and the seepage amount is 1.87ml;

②It was placed at a 60° horizontal inclination for 1 hour, and there was water seepage, and the amount of seepage was 4.21ml.

Scheme 14: As shown in Figure 20

Take 2 pieces of this product, pour 40ml of water, and wait for 10 minutes.

①The horizontal inclination is 45° and placed for 1 hour, there is water seepage, and the seepage amount is 3.25ml;

②It was placed at a 60° lateral inclination for 1 hour, and there was water seepage, and the amount of seepage was 4.82ml.

Scheme 15: As shown in Figure 21

Take 2 pieces of this product, pour 40ml of water, and wait for 10 minutes.

①The horizontal inclination is 45° and placed for 1 hour, there is water seepage, and the seepage amount is 3.46ml;

②It was placed at a 60° lateral inclination for 1 hour, and there was water seepage, and the amount of seepage was 4.56ml.

Scheme 16: As shown in Figure 22

Take 2 pieces of this product, pour 40ml of water, and wait for 10 minutes.

②It was placed at a 60° lateral inclination for 1 hour, and there was water seepage, and the amount of seepage was 2.66ml.

Scheme 17: As shown in Figure 5

Take 2 pieces of this product, pour 40ml of water, and wait for 10 minutes.

①The horizontal inclination is 45° and placed for 1 hour, there is water seepage, and the seepage amount is 0.87ml;

②The horizontal inclination was 60° and placed for 1 hour, and there was water exudation, and the exudation amount was 1.52ml.

Summary: According to the above test, it can be found that all the above schemes have a water storage function at the bottom. According to the test results, it can be seen that scheme 3, scheme 7, scheme 8, scheme 10, scheme 16, scheme under the condition of lateral inclination of 45°/60° 17 can effectively prevent the outflow of water. Considering factors such as product appearance, process, and bottom water storage, the optimal solution 17 is finally selected.

Claims

A food support box with thin film pores permeating and isolating, comprising a box body (1), characterized in that: a blood water collecting tank (11) arranged at the bottom of the box body (1) has a punched water absorbing pad (2) to collect the blood water The notch of the collecting tank (11) is closed, the punching water-absorbing pad (2) is a multi-layer structure, the uppermost layer is a water-proof punching film (21), and the lower layer of the water-proof punching film (21) is a water-absorbing material The layer (22), the water-proof punching film (21) and the water-absorbing material layer (22) are combined together up and down.
A food tray with thin-film penetration and isolation according to claim 1, characterized in that: the blood-water collecting tank (11) is provided with a thin-film support rib, and the thin-film support rib is supported on the punching water-absorbing pad (2) to prevent the middle of the punching pad (2) from sinking downward.
The food tray with thin-film penetration and isolation according to claim 2, characterized in that: the blood-water collecting tank (11) is rectangular, and the film-supporting rib comprises a rectangular outer frame (12) and Several T-shaped support rib positions (13) in the outer frame, an annular groove (14) is formed between the outer frame (12) and the inner wall of the blood water collecting tank, and the T-shaped support rib positions (13) include transverse ribs and longitudinal ribs that are perpendicular to each other. Rib, one end of the longitudinal rib is connected to the middle part of the transverse rib, the other end of the longitudinal rib is connected to the transverse part of the rectangular outer frame (2), and the longitudinal rib is perpendicular to the transverse part of the rectangular outer frame (2). The support ribs (13) are divided into two groups, the longitudinal ribs of the two groups of T-shaped support ribs (13) are respectively connected with two lateral portions of the rectangular outer frame (2), and the two groups of T-shaped support ribs (13) are mutually connected. Displaced arrangement and an arcuate flow channel (15) is formed in the outer frame (12), two notches (16) are opened in the middle of the longitudinal part of the outer frame (12), and the notches (16) communicate with the annular groove (14) and the arcuate flow Road (15).
The food tray with thin-film penetration and isolation according to claim 1, characterized in that: a plurality of longitudinal protruding strips (17) are arranged on the inner side wall of the box body (1), and adjacent longitudinal protruding strips (17). A longitudinal guide groove (18) is formed between 17).
The food tray with thin-film penetration and isolation according to claim 1, characterized in that: a connecting groove (19) is further provided on the edge of the blood-water collecting tank (11); The edge of the water-absorbing pad (2) is welded at the connecting groove (19) by ultrasonic waves.
A food tray with thin-film penetration and isolation according to claim 5, characterized in that: the depth of the connecting groove (18) is greater than or equal to the thickness of the punched water-absorbing pad (2), and the punched water-absorbing pad (2) ) is welded at the connecting groove, the top surface of the punched water absorbing pad (2) is slightly lower than the bottom surface of the box body or flush with the bottom surface of the box body.
The food tray with thin-film penetration and isolation according to claim 1, characterized in that: the punched water-absorbing pad (2) has a three-layer structure, with a water-absorbing material layer (22) in the middle, and the water-absorbing material layer (22) Composite water-proof punching films (21) on the upper and lower sides.
A kind of food tray with permeation and isolation of small film pores as claimed in claim 1 or 7, characterized in that: the water-proof punching film (21) is a PE perforated film; 2mm, and the center-to-center distance between adjacent permeable holes is 4-6mm.
The food tray with permeation and isolation of film pores according to claim 1 or 7, characterized in that: the water-absorbing material layer (22) is a wood fiber layer, a water-absorbing bead layer or a water-absorbing cotton layer.
The food tray with thin film pores permeating and isolating according to claim 2, characterized in that the blood water collecting tank (11) is divided into several small chambers by the film supporting ribs, and the small chambers are connected with each other.