CN110432171B

CN110432171B - Dog chew with hollow structure and preparation method thereof

Info

Publication number: CN110432171B
Application number: CN201910746141.0A
Authority: CN
Inventors: 不公告发明人
Original assignee: Suzhou Foaibo Biological Technology Co ltd
Current assignee: Shanghai Frey Bio Technology Co ltd
Priority date: 2019-08-13
Filing date: 2019-08-13
Publication date: 2021-07-06
Anticipated expiration: 2039-08-13
Also published as: CN110432171A

Abstract

The invention relates to the field of pet foods, and provides a dog chews with a hollow structure and a preparation method thereof. The dog chews are strip-shaped elastic bodies, a plurality of through holes penetrating through the side walls are formed in the elastic bodies at intervals in the length direction and used for teeth to penetrate, after top walls arranged on the elastic bodies are in physical contact with the teeth and the teeth or the gum exert contact pressure equal to or larger than a preset value, the top walls are damaged to form friction openings, and therefore the prepared product has the function of massaging the gum and the tooth roots below the gum no matter the body orientation of a pet is. The preparation method optimizes the preparation process of the traditional chews, uses the steam stirring pot to uniformly heat the cured materials to replace the physical extrusion heating cured materials of the screw machine, and can prepare the chews finished products with uniform curing, novel and diversified shapes, uniform thickness, small shape shrinkage and good shaping.

Description

Dog chew with hollow structure and preparation method thereof

Technical Field

The invention relates to the field of pet foods, in particular to a dog chews with a hollow structure and a preparation method thereof.

Background

Dog chews are a pet toy or pet food; the shape of the meat ball is similar to bone, rubber ball, circle, stick, shoe, particle and the like, and the meat ball is a high-protein meat food nutritional good product for pet dogs. The dog chew is a chew specially designed for cleaning the oral cavity of a dog, and the formation of dental plaque and tartar can be slowed down by frequently chewing and regularly brushing teeth.

U.S. patent No.20110052661 discloses an edible product for oral hygiene in pets, the body of which comprises an outer layer and an inner layer: the outer layer is composed of a first component comprising an abrasive component and one or more breath freshening components for removing plaque by chewing by the pet to inhibit the formation of tartar and stains and the production of breath odors; the inner layer is composed of a second component comprising an abrasive component and one or more active ingredients, the abrasive component being effective to remove plaque, tartar and tartar from the teeth when chewed by a pet. However, the product still has some problems: the tooth cleaning device is characterized in that a columnar structure and a plurality of convex structures are formed along the edge of the peripheral surface of a column body, so that the contact area between teeth and the surface of a chew can be increased when a dog bites, only partial structures of the teeth such as the inner surfaces of the teeth are cleaned, the outer surfaces of the teeth and the gum area cannot be touched, and the teeth cannot be cleaned to a sufficient depth; secondly, the solid product structure does not have enough product structure stress, and the product cannot be chewed for a long time, thereby achieving the effect of cleaning teeth.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a dog chew with a hollow structure and a preparation method thereof, which are used for improving the structure of the dog chew and increasing the oral functional value and the economic benefit when the dog chew is eaten.

The invention provides a dog chews with a hollow structure.

The specific technical scheme is as follows:

the utility model provides a dog chews with hollow structure, includes rectangular form elastic body, sets up a plurality of through-hole in elastic body, rectangular form elastic body is including two roof, first lateral wall, second lateral wall, third lateral wall and the fourth lateral wall that each other is the opposite face, first lateral wall, second lateral wall, third lateral wall and fourth lateral wall end to end connection in proper order.

The through hole penetrates from the surface of the first side wall to the surface of the third side wall, and the geometric center connecting line of the through holes on the same horizontal line is perpendicular to the opening direction of the through holes.

Wherein, a plurality of first through-holes have been seted up along elasticity main part length direction interval, and are adjacent form the partition layer between the first through-hole, partition layer both sides respectively with form a plurality of second through-holes between the nearest roof of distance, first through-hole with adjacent be public layer between the second through-hole.

The area of the first side wall/the third side wall is larger than that of the second side wall/the fourth side wall; the through hole is arranged on the side surface with larger area of the long strip-shaped elastic main body. The first side wall/the third side wall is provided with through cavities with various cut surfaces for the penetration of teeth, and the effects of cleaning and scraping the surfaces of the teeth and the gum are achieved.

After the coping is in physical contact with the tooth and the tooth or gum exerts a pressure equal to or greater than the coping destruction limit, the coping is destroyed, forming a frictional opening having an irregular cross-section.

In one embodiment, the maximum aperture of the second through hole is greater than or equal to the maximum width of the tooth.

In one embodiment, the line connecting the geometric centers of the first through holes is parallel to the line connecting the geometric centers of the second through holes.

In one embodiment, the partition layer and the common layer are sequentially connected end to form a connecting layer in a sine shape.

In one embodiment, a third through hole parallel to the extending direction of the second through hole is arranged in the partition layer.

In one embodiment, the first through-hole has a cross-sectional shape of a quadrangle, a hexagon, or a polygon, and the second through-hole has a cross-sectional shape of a triangle or a trapezoid.

In one embodiment, the surface of the top wall is provided with a plurality of grooves parallel to the opening direction of the through holes, so that the texture characteristics of the product are increased, and meanwhile, the top wall is used as a top wall missing part, and after the top wall structure is damaged by teeth, a port facing the inside of the through cavity is formed for the teeth to be inserted.

In one embodiment, the surface of the elastic body is provided with a coating for oral care, wherein the coating comprises the following components in parts by weight: 2-5 parts of vitamin, 2-3 parts of propolis extract, 2-2.5 parts of cranberry extract and 0.5-1.0 part of calcium gluconate.

In one embodiment, the dog chew is integrally formed and made from edible materials comprising: 40-60 parts of amylose, 3-8 parts of edible adhesive, 2-8 parts of grease, 0.5-5 parts of insoluble cellulose, 0.5-2 parts of soluble dietary cellulose, 2-5 parts of humectant and 0.1-1 part of flavoring agent. The amylose is preferably any one or more of rice starch, brown rice powder, oat powder and cassava starch. The edible adhesive is preferably one or more of carrageenan, gelatin, sodium alginate and sodium carboxymethylcellulose. The oil is preferably palm oil, olive oil, corn oil, or grape seed oil. The flavoring agent is prepared from the following components in parts by weight: 1-5 parts of honey, 1-3 parts of yeast extract, 1-3 parts of egg liquid and 0.1-1 part of mint extract.

In one embodiment, the wall thickness of the partition layer and the common layer is between 1 and 10 mm.

The invention also provides a preparation method of the dog chews with the hollow structure, which comprises the following steps:

1) pouring the edible raw materials into a bin: the edible raw material comprises; amylose, edible adhesive, grease, insoluble cellulose, soluble dietary cellulose, humectant and flavoring agent;

2) mixing raw materials: uniformly stirring the materials in the step 1) to prepare a mixed material;

3) curing raw materials: stirring and curing the mixed material by using a steam stirring pot, wherein the amount of steam used in the food industry is 1-3 times of the weight of the material in the step 1), and the curing time is 10-30 minutes;

4) primary extrusion molding: introducing the materials into a screw extruder, enabling the mixed materials to move forwards in an axial direction under the action of pushing of a screw groove, conveying the mixed materials to a metering end, stably extruding strip-shaped semi-finished products, extruding and molding at the working section without energy conversion, wherein the temperature of the materials cannot be obviously increased, the mixed materials cannot be continuously cured, and the functions of exhausting gas and homogenizing the materials are achieved; the compression ratio of the semi-finished product is 1-1.2; the screw pitch and the diameter of the screw extruder are constant;

5) primary cooling;

6) secondary extrusion molding: continuously conveying materials by using a screw, arranging a material conveying channel in a screw extruder, arranging a screw pushing rod in the material conveying channel, connecting the tail end of the screw pushing rod with a motor shaft of a rotating motor, driving the screw pushing rod to rotate by the rotating motor, continuously conveying the materials into a front machine barrel by a source under the action of a spiral pushing force, and extruding the semi-finished products through mouth molds with different section shapes to obtain finished products, wherein the compression ratio of the finished products is 1-1.2; the extrusion molding of the working section has no energy conversion, the temperature of the materials cannot be obviously increased, the mixed materials cannot be cured continuously, and the effects of exhausting gas and homogenizing the materials are achieved; the compression ratio of the semi-finished product is 1-1.2; the screw pitch and the diameter of the screw extruder are constant;

7) cooling; used for cooling the supplies and discharging the water vapor that the supplies volatilize;

8) slitting;

9) coating: conveying the finished product prepared in the step 8) into leaching equipment, leaching the solution of the oral care coating, and collecting and recycling the solution;

10) drying: putting the prepared finished product into a drying room, drying at the temperature of not higher than 50 ℃ until the water content is not more than 12%;

11) and (6) packaging.

The product properties were as follows:

the product is observed by visual observation to have uniform color, clean surface and no stain.

The smell is adopted to detect that the product has normal smell and no musty smell or other peculiar smell.

And the shape rule of the product is observed by visual observation, so that the design requirement is met.

The product is detected by a metal detector, and no impurities can be seen by naked eyes and no metal foreign matters with the maximum size exceeding 2 mm exist.

The moisture content measurement is carried out according to the measuring method of the moisture content in the GB 5009.3 food, and the result is as follows: the water content/(g/100 g) is less than or equal to 14.

The enterobacteriaceae test was performed according to the SN 0169 test method, with the results: coli/(per g) < 300.

The salmonella test is carried out according to the test method of GB 4789.4-2010 food microbiology, and the result is that: and is not detected.

Compared with the prior art, the invention has the following beneficial effects:

1) compared with the solid chew, the product prepared by the invention has the advantages of light weight, less raw material consumption, high yield and the like, and the stress is eliminated by additionally arranging the through holes in the product, so that the bending phenomenon caused by high temperature in the chew manufacturing process is avoided. The surface of product roof is equipped with the recess that the direction was seted up to the multichannel is on a parallel with the through-hole, has increased the texture characteristic of product, makes things convenient for tooth to destroy roof structure to prick and lead to intracavity portion, the lateral wall of product is equipped with the cross-sectional logical chamber of various shapes simultaneously, supplies the tooth to prick into, consequently no matter pet health orientation how, the product that makes all plays the effect of massaging the gum and the root of a tooth of gum below. In addition, the oral care coating coated on the surface of the prepared product plays a role in oral care after contacting saliva and teeth. The through cavity calibers and adjacent intervals of different prepared products are different, and the product can be adjusted to be in a chewable state and is suitable for pets of various sizes or species.

2) The preparation method optimizes the preparation process of the traditional chews, replaces the conveying section and the compression section of a screw machine with a steam stirrer, wherein the steam energy can be uniformly transmitted into the materials, is a curing process without mechanical energy, the materials are conveyed into a pipeline and are not easy to deform after being extruded from an extrusion head, and the materials are uniformly extruded from a flow channel of the machine head in a quantitative and constant pressure manner by virtue of the extrusion heads with different structures, so that a finished product with novel and diversified shapes and uniform thickness is prepared; the process has low heat loss, unlimited product molding, increased product internal stress, reduced weight, enhanced stability, prolonged chewing life, and reduced cost.

Drawings

Fig. 1 is a perspective view of a chew involved in an embodiment of the present invention.

Fig. 1b is a schematic view of a third sidewall of the chew of fig. 1.

Fig. 2 is a perspective view of a first modified chew relating to an embodiment of the present invention.

Fig. 2b is a cross-sectional view of the chew of fig. 2.

Fig. 3 is a perspective view of a second modified chew involved in the embodiment of the present invention.

Fig. 3b is a cross-sectional view of the chew of fig. 3.

Fig. 4 is a perspective view of a third modified chew relating to an embodiment of the present invention.

Fig. 4b is a cross-sectional view of the chew of fig. 4.

Fig. 5 is a perspective view of a fourth modified chew relating to an embodiment of the present invention.

Fig. 5b is a cross-sectional view of the chew of fig. 5.

Fig. 6 is a perspective view of a fifth modified chew relating to the embodiment of the present invention.

Fig. 6b is a cross-sectional view of the chew of fig. 6.

Fig. 7 is a perspective view of a sixth modified chew relating to an embodiment of the present invention.

Fig. 7b is a cross-sectional view of the chew of fig. 7.

Fig. 8 is a perspective view of a five-star shaped chew.

Reference numerals: an elastic body-10; a top wall-11; a first sidewall-12; a second side wall-13; a third side wall-14; a fourth side wall-15; a groove-16; a through-hole-20; a first through-hole-21; a second through-hole-22; a third through hole-23; a partition layer-24; a common layer-25; a fourth through-hole 26.

Detailed Description

The invention is described in detail below with reference to specific embodiments:

fig. 1 is a perspective view of a chew according to an embodiment of the present invention, the chew having an elongated elastic body 10, including two top walls 11 facing each other, and a first side wall 12, a second side wall 13, a third side wall 14 and a fourth side wall 14 connected end to end, wherein a plurality of through holes 20 are provided in the elastic body 10, the through holes 20 penetrating from the surface of the first side wall 13 to the surface of the third side wall 14, so that teeth of a pet can be inserted into the through holes 20 and physically contact with the inner peripheral surface of the contact through holes 20 during chewing.

Wherein, be equipped with a plurality of first through-holes 21 along elasticity main part 10 length direction interval, it is adjacent form between the first through-hole 21 and cut off the layer 24, be equipped with the third through-hole 23 that is on a parallel with second through-hole 22 extending direction in the layer 24, cut off and form a plurality of second through-holes 22 between layer 24 both sides respectively and the nearest roof 11 of distance, first through-hole 21 with adjacent be public layer 25 between the second through-hole 22. The geometric center connecting line of the through holes 20 on the same horizontal line is perpendicular to the opening direction of the through holes 20.

The surface of the top wall 11 is provided with a plurality of grooves 16 parallel to the opening direction of the through hole, the texture characteristics of the product are increased, meanwhile, the grooves are used as weakening parts, when the top wall 11 is in physical contact with teeth and the teeth or gum applies contact pressure equal to or larger than a preset value, the top wall 11 is damaged, a friction opening is formed, and the tail end of the friction opening can mechanically clean the teeth.

Fig. 1b is a cross-sectional view of the chew in fig. 1, the first through hole 21 is in a bottle shape, the common layer 25 of the top wall 11 and the partition layer 24 is connected to form a second through hole 22, the cross-sectional shape of the second through hole 22 is approximately in a "convex" shape, the cross-sectional shape of the third through hole 23 is in a circular shape, the cross-sectional area of the first through hole 21 is larger than or equal to that of the second through hole 22, and a through cavity parallel to the extending direction of the second through hole is further arranged in the partition layer 24 extending to the vertex of the elastic body 10. The maximum aperture of the second through hole is greater than or equal to the maximum width of the tooth.

Wherein the total area of the cross-sections of the through holes 20 penetrating the elastic body 10 is greater than 50% of the total surface area of the first side wall 13 and the third side wall 14 in the elastic body 10, and the connecting line of the geometric centers of the first through holes 21 is parallel to the connecting line of the geometric centers of the second through holes 22.

Fig. 2 is a perspective view of a first variant of the chew shown in fig. 1, and fig. 2b is a cross-sectional view of the chew shown in fig. 2, wherein the through holes are arranged in the same manner as the through holes in fig. 1, i.e. a number of first through holes 21 are spaced apart in a row and the second through holes 22 are arranged in 2 x 5 rows. However, the difference is that no third through-hole is provided in the partition layer 24; the cross-sectional shape of the first through-hole 21 is hexagonal, and the cross-sectional shape of the second through-hole 22 is isosceles trapezoid. The wall thickness of the partition layer and the common layer is 1-10 mm.

Fig. 3 is a perspective view of a second deformed chew related to the chew shown in fig. 1, and fig. 3b is a cross-sectional view of the chew in fig. 3, wherein the partition layer 24 and the common layer 25 are sequentially connected end to form a sine-shaped connection layer, no third through hole is arranged in the partition layer 24, the cross-sectional shape of the first through hole 21 is approximately rhombic, and the cross-sectional shape of the second through hole 22 is approximately triangular.

Fig. 4 is a perspective view of a third modified chew related to the chew shown in fig. 1, and fig. 4b is a cross-sectional view of the chew in fig. 4, wherein the cross-sectional shapes of the first through hole 21 and the second through hole 22 are the same rectangle, no third through hole is provided in the partition layer 24, fourth through holes 26 are respectively formed between two ends of the first through hole 21 and the distance from the top wall 11, and the cross-sectional shape of the fourth through hole 26 is a rectangle, and the cross-sectional area is smaller than that of the first through hole 21.

Fig. 5 is a perspective view of a fourth variant of the chew shown in fig. 1, and fig. 5b is a cross-sectional view of the chew shown in fig. 5, wherein the through holes are arranged in the same manner as the through holes in fig. 1, i.e. a number of first through holes 21 are spaced apart in a row and the second through holes 22 are arranged in 2 x 4 rows. However, the difference is that the partition layer 24 is not provided with a third through hole therein, and the cross-sectional shape of the first through hole 21 is triangular and the cross-sectional shape of the second through hole 22 is quadrangular.

Fig. 6 is a perspective view of a fifth deformation of the chew shown in fig. 1, and fig. 6b is a cross-sectional view of the chew in fig. 6, wherein a plurality of through hole units are sequentially formed along the length direction of the elastic body 10, the cross section of each through hole unit is a combination of a quadrangle and a cross, and the top point of the cross coincides with the top point of the quadrangle.

Fig. 7 is a perspective view of a sixth variant of the chew shown in fig. 1, and fig. 7b is a cross-sectional view of the chew shown in fig. 7, the through holes being arranged in the same way as the through holes in fig. 1, i.e. a number of first through holes 21 are arranged in a row at intervals, second through holes 22 are arranged in 2 x 8 rows, and a third through hole is arranged in a partition layer 24; the cross section of the first through hole 21 is approximately in a shuttle shape, two ends of the shuttle shape are respectively connected with the top wall, the cross section of the second through hole 22 is in an isosceles trapezoid shape, and the cross section of the third through hole 23 is in a circular shape. The first through-hole 21 and the second through-hole 22 may have the same cross-sectional shape or different cross-sectional shapes, and the first through-hole 21 has a quadrangular, hexagonal, or polygonal cross-sectional shape.

Example 1

A method for preparing the dog chew shown in figure 1 comprises the following steps:

1) pouring the edible raw materials into a bin: the edible raw material comprises; 40 parts of amylose, 3 parts of edible adhesive, 2 parts of grease, 1 part of insoluble cellulose, 1 part of soluble dietary cellulose, 2 parts of humectant and 0.1 part of flavoring agent;

2) mixing raw materials: uniformly stirring the materials in the step 1) at normal temperature to prepare a mixed material;

3) curing raw materials: stirring and curing the mixed material by using a steam stirring pot, wherein the amount of steam used in the food industry is 2 times of the weight of the material in the step 1), and the curing time is 20 minutes;

5) primary cooling;

8) slitting;

9) coating: feeding the finished product prepared in the step 8) into a leaching device, and leaching the solution of the oral care coating, wherein the coating comprises the following components in parts by weight: 2 parts of vitamin, 2 parts of propolis extract, 2 parts of cranberry extract and 0.5 part of calcium gluconate, and the solution is recycled after being collected;

11) and (6) packaging.

Example 2

The same preparation process as in example 1 was used, wherein the edible raw material formulation: 50 parts of amylose, 5 parts of edible adhesive, 3 parts of grease, 0.5 part of insoluble cellulose, 0.5 part of soluble dietary cellulose, 2 parts of humectant and 0.4 part of flavoring agent. The coating comprises the following components in parts by weight: 2.5 parts of vitamin, 2 parts of propolis extract, 2 parts of cranberry extract and 0.5 part of calcium gluconate, and the coating has the effect of repairing oral mucosa.

Example 3

The same preparation process as in example 1 was used, wherein the edible raw material formulation: 55 parts of amylose, 5.5 parts of edible adhesive, 5 parts of grease, 2 parts of insoluble cellulose, 1 part of soluble dietary cellulose, 3 parts of humectant and 0.4 part of flavoring agent. The coating comprises the following components in parts by weight: 2.5 parts of vitamin, 2 parts of propolis extract, 2 parts of cranberry extract and 0.8 part of calcium gluconate.

Comparative example 1

The same formulation of materials as in example 1 was used, using a single-screw or twin-screw cooker-extruder, and the preparation method was as follows:

1) mixing: mixing the raw materials and the auxiliary materials uniformly at normal temperature according to a proportion;

2) curing: uniformly feeding the mixed materials into a double-screw extruder in an hourly controlled manner, wherein the specific process parameters of the single-screw extruder are as follows: the temperature of the first zone, the second zone, the third zone and the fifth zone is room temperature, the temperature of the fourth zone is 70 ℃, the rotating speed of the screw is 18 Hz, the discharge hole die is a circular hole with the diameter of 10mm, and the single-screw extruder comprises the following operation steps: powering on and starting up, starting heating the machine after setting the temperature, simultaneously opening an external circulation water bath system and a screw extruder to ensure that the machine has a relatively stable temperature in the use process, simultaneously restarting a screw rotating device after running water is injected into the machine, wetting a screw and a cavity, simultaneously cleaning the screw, adding amylose into the machine to further clean the machine after the temperature is raised to the set temperature, injecting mixed materials, and starting receiving materials when the discharged materials are stable, namely, the color and the thickness are uniform; fully curing and extruding into strips, wherein the curing temperature is controlled at 130 ℃ and the curing time is 5 min;

3) cooling; used for cooling the materials and reducing the evaporation capacity of the water vapor of the materials;

4) slitting;

5) coating: conveying the finished product prepared in the step 8) into leaching equipment, leaching the solution of the oral care coating, and collecting and recycling the solution;

6) drying: putting the prepared finished product into a drying room, drying at the temperature of 45 ℃ until the water content is not more than 12%;

7) and (6) packaging.

Comparative example 2

The product was prepared using the same material formulation as in example 2 and the same preparation procedure as in comparative example 1.

Comparative example 3

A dog chew product as shown in figure 8 is prepared by the same process as in comparative example 1, and the same material formulation as in example 1.

Product performance testing

The shape specification of the selected test sample is as follows: biting the rubber stick, taking a plurality of samples, and simultaneously carrying out the following experiments:

sensory test

The detection is carried out by adopting visual inspection and olfaction methods, and the metal foreign bodies are detected by adopting a metal detector. The impurities in the examples 1 to 3 have uniform color and luster, and clean and no stain on the surface; normal smell, no musty smell and other peculiar smell; the shape is regular, and the design requirement is met; the surface of the product prepared in comparative example 1-2 has local brown spots; individual presence of off-flavors; irregular shape, loose structure, porosity, not meeting the design requirement and no visible impurities.

The above phenomenon can be explained as the material is fed into the screw cooking-extruding machine, and the material is strongly extruded, stirred and sheared due to the mechanical friction between the material and the barrel and the screw, and the texture and appearance of the material are greatly changed along with the gradual increase of the temperature and the pressure in the barrel, so that the prepared product is a loose, porous and irregular puffed structure. The product has the phenomena of color spots and abnormal odor, and the Maillard reaction of the material in the screw extrusion cavity can generate brown or even black macromolecular substance melanoidin or melanoidin, thereby influencing the color and the flavor of the product.

Mechanical property detection

XTPlus analyzer, the product is placed on the horizontal operation table, supported by a flat plate, pressed down by HDP/LKBF probe, and the product gradually deforms during the downward movement of the probe. The speed before measurement is 2 mm/s, the speed after measurement is 1 mm/s, the speed after measurement is 10 mm/s, the fixed deformation ratio is fixedly set to be 80%, and the test cycle number is 2. The average was determined 3 times per product.

Measurement of hardness: the maximum peak at 1 st compression, i.e., the maximum force that the product can withstand when it breaks under bending load or reaches bending, reflects the stiffness of the product.

Young's modulus of elasticity E measurement: this is the ratio of stress to strain to which the product is subjected.

Measurement of elasticity: the degree of recovery of the product after one compression.

TABLE 1 sensory test results of products with different heat treatment modes

Test index	Hardness (g)	Young's modulus of elasticity E	Elasticity	Chewiness (g)
					Example 1	21000	29	0.74	6700
Example 2	22000	25	0.79	6400
					Example 3	20000	28	0.75	6500
Comparative example 1	18000	30	0.69	5500
					Comparative example 2	17000	30	0.68	5500
Comparative example 3	25000	34	0.62	7200

The indexes of hardness, Young's modulus, elasticity and chewiness of the product are integrated, and the product prepared in the embodiment 1-3 has moderate hardness, larger elasticity and better toughness and chewiness. Wherein, when the hardness is too small, the physical friction force applied to the teeth is too weak to effectively remove plaque and tartar, and when the hardness is too large, the finished product is too hard, thereby having harmful effects on teeth and digestion and even damaging gums; the smaller the Young's modulus is, the better the toughness of the product is; the smaller the elasticity, the easier the product is to break; the chewiness reflects the work required to be done by the sample being chewed in the mouth to enable swallowing, the greater the chewiness, the more work that needs to be done; the increase in chewiness indicates that the product is chewed up to a level suitable for swallowing and performs a great deal of work, and is very hard to eat, but the chewiness is too low and the product does not serve the purpose of improving the oral hygiene of the pet by good friction.

It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.

Claims

1. A dog chew with a hollow structure comprises a strip-shaped elastic body (10) and a plurality of through holes (20) arranged in the elastic body, wherein the strip-shaped elastic body comprises two top walls (11), a first side wall (12), a second side wall (13), a third side wall (14) and a fourth side wall (15) which are opposite to each other, and the first side wall (12), the second side wall (13), the third side wall (14) and the fourth side wall (15) are sequentially connected end to end;

the structure is characterized in that the through hole (20) penetrates from the surface of the first side wall (12) to the surface of the third side wall (14), and the geometric center connecting line of the through hole (20) on the same horizontal line is vertical to the opening direction of the through hole (20);

the elastic body (10) is provided with a plurality of first through holes (21) at intervals along the length direction, a partition layer (24) is formed between the adjacent first through holes (21), a plurality of second through holes (22) are formed between two sides of the partition layer (24) and the top wall (11) closest to the partition layer, and a common layer (25) is arranged between each first through hole (21) and the adjacent second through holes (22);

the area of the first side wall (12)/third side wall (14) is larger than the area of the second side wall (13)/fourth side wall (15);

after the top wall (11) is in physical contact with the teeth and a contact pressure equal to or greater than a predetermined value is applied to the teeth or gums, the top wall (11) is broken to form a frictional opening.

2. Dog chew with hollow core structure according to claim 1, characterised in that the maximum aperture of the second through hole (22) is larger than or equal to the maximum width of the tooth.

3. Dog chew with hollow core structure according to claim 2, characterised in that the line of the geometrical centres of said first through holes (21) is parallel to the line of the geometrical centres of said second through holes (22).

4. Dog chew with hollow core structure according to claim 3, characterised in that said top wall (11) is provided with a plurality of grooves (16) on its surface parallel to the direction of opening of the through holes (20).

5. Dog chew with hollow core structure according to claim 1, characterised in that said first through hole (21) and second through hole (22) have the same cross sectional shape or different cross sectional shape, said first through hole (21) having a quadrangular, hexagonal cross sectional shape and said second through hole (22) having a triangular, trapezoidal cross sectional shape.

6. Dog chew with hollow core structure according to claim 5, characterised in that a third through hole (23) is provided in said partition layer (24) parallel to the extension of the second through hole (22).

7. The dog chew having a hollow core structure of any one of claims 1-6, wherein the dog chew is integrally formed and made of edible materials, the edible materials comprising: 40-60 parts of amylose, 3-8 parts of edible adhesive, 2-8 parts of grease, 0.5-5 parts of insoluble cellulose, 0.5-2 parts of soluble dietary cellulose, 2-5 parts of humectant and 0.1-1 part of flavoring agent.

8. Dog chew with hollow core structure according to claim 7, characterised in that the wall thickness of the partition layer (24) and the common layer (25) is between 1 and 10 mm.

9. Dog chew with hollow core structure according to claim 7, characterised in that the surface of the elastomeric body (10) is provided with a coating for oral care, said coating comprising the following components in parts by weight: 2-5 parts of vitamin, 2-3 parts of propolis extract, 2-2.5 parts of cranberry extract and 0.5-1.0 part of calcium gluconate.

10. A method of preparing a dog chew having a hollow core structure as claimed in any one of claims 1 to 9, comprising the steps of:

3) curing raw materials: stirring and curing the mixed material by using a steam stirring pot, wherein the amount of steam used in the food industry is 1-3 times of the weight of the material in the step (1), and the curing time is 10-30 minutes;

4) primary extrusion molding: feeding the mixed material into a screw extruder, conveying the mixed material to a metering end by a screw, and extruding a strip-shaped semi-finished product, wherein the compression ratio of the screw extrusion in the working section is 1-1.2; the screw pitch and the diameter of the screw extruder are constant;

5) primary cooling;

6) secondary extrusion molding: continuously conveying the mixed materials by using a screw, and extruding the semi-finished product out of finished products through mouth molds with different section shapes; the compression ratio of the screw extrusion of the section is 1-1.2; the screw pitch of the screw and the diameter of the screw are constant;

7) cooling; used for cooling the mixed materials and discharging water vapor volatilized from the mixed materials;

8) slitting;

11) and (6) packaging.