JP2000016547A - Resin belt for chopping board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve cut resistance and split resistance of a chopping board used for cutting foods under carry by forming front/rear cover layers of a carrier resin belt of thermoplastic resin, by forming the front cover layer thicker than the rear cover layer, and by providing them with antibacterial and mildewproof properties. SOLUTION: A resin belt 1 for a chopping board is so formed that a front cover layer 3 and a rear cover layer 4 are laminated in the front side and a rear side of a core body canvas 2 to be a belt main body respectively. The front/rear cover layers 3, 4 are formed of thermoplastic resin and polyurethane resin is among the thermoplastic resin. To improve the cut resistance and prevent the fine split, the front/rear cover layers 3, 4 are so formed that the hardness of the cover layer is 60-80, the cover layer tensile strength is set to 5 Mpa or less in 100% modulus, and the permanent deformation in 25% extension becomes 4% or less. The front/rear cover layers 3, 4 are so formed that the front cover layer 3 is thicker than the rear cover layer 4 and the belt total thickness becomes 5-20 mm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin belt for a cutting board, and more particularly to a resin belt for a cutting board which is used for cutting food, herbal medicine and the like while being conveyed and serves as a cutting board.

[0002]

2. Description of the Related Art Conventionally, a cutting board belt which is used for cutting food and herbal medicine while transporting it and serving as a cutting board is as follows. Nitrile rubber belts and (2) non-conductive resin belts made of thermosetting urethane having a hardness of the front cover layer of about 92 are known.

[0003]

However, the above cutting board belt not only fails the Food Sanitation Law of the rubber belt of (1) but also has a poor cut resistance, so that the cutting belt is not covered with the cover rubber at the time of cutting. Scratches occur, cutting waste is mixed into food, and the hardness of the cover rubber is low, so when cutting fibrous Chinese herbs, etc., it is not possible to cut because the cover rubber has elasticity even if the cutter blade bites into the cover rubber There are problems such as.

[0004] The resin belt of (2) has a high hardness and is suitable for cutting fibrous Chinese herbal medicines. There is a problem that the belt tension is large and the tension tension is difficult to adjust.

The present invention has been proposed as a result of intensive studies to solve the above-mentioned problems, and has passed the Food Sanitation Act by regulating the cover material of the front cover layer, the total belt thickness and the cover characteristics. Another object of the present invention is to provide an excellent resin belt for a cutting board which is excellent in cut resistance and resistance to crushing and can eliminate defective cutting of a cut object.

[0006]

In order to achieve the above-mentioned object, the present invention is characterized in that a front and back cover of a heart-shaped canvas is a resin belt for conveyance comprising a resin layer, wherein the front and back cover layers are formed of a thermoplastic resin. And a front cover layer having a thickness greater than that of a back cover layer and having antibacterial and antifungal properties.

The resin belt for a cutting board has a total belt thickness of 5 to 20 mm, the thermoplastic resin is a polyether-based polyurethane or a polyester-based polyurethane, and the cover has a hardness of 6 JIS-A.
0 to 80, 100% modulus is 5 MPa or less and 25
Permanent strain at% elongation is 4% or less. In addition, the front cover layer has a two-layer structure in order to achieve the conflicting functions of preventing the generation of cutting waste at the time of cutting and preventing the cutter blade from biting.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the resin belt for a cutting board according to the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, a resin belt 1 for a cutting board according to the present invention comprises a core body canvas 2 serving as a belt body, a front cover layer 3 on the front side of the core body canvas 2, and a back cover on the back side. The layer 4 and the layer 4 are laminated.

The core body canvas 2 is woven in a plain weave, a twill weave, a satin weave, or the like with a low elongation fiber such as a cotton fiber, a polyester fiber, an aromatic polyamide fiber, and a nylon fiber.
If necessary, the core body fabric 2 is impregnated or coated with a thermoplastic resin such as polyurethane or polyvinyl chloride (PVC) resin.

The thermoplastic resin forming the front and back cover layers 3 and 4 is a main part of the present invention. As the thermoplastic resin, a polyurethane resin mainly composed of polyether polyurethane or polyester polyurethane is preferable. Other examples include a vinyl chloride resin and a polyolefin-based resin. The thermoplastic resin is mixed with an antibacterial and fungicide composition.

The antibacterial and fungicidal composition comprises bis (2-pyridylthio-1-oxide) zinc, which is an active ingredient of the antibacterial and fungicide, with an ultraviolet absorber and a discoloration inhibitor, and further with a dispersant. Is used.

The ultraviolet absorber is blended to prevent the belt from being deteriorated by the action of ultraviolet light. The ultraviolet absorber includes 2- (3-t-butyl-5-methyl-2-hydroxyphenyl). ) -5-Chlorobenzotriazole, 2- (3,5-di-t-butyl-2-hydroxyphenyl) -5-chlorobenzotriazole, 2-
(5-methyl-2-hydroxyphenyl) benzotriazole, 2- (3,5-di-t-amyl-2-hydroxyphenyl) benzotriazole, 2- (3,5-di-
t-butyl-2-hydroxyphenyl) benzotriazole, 2- {2-hydroxy-3,5-bis (α, α-
Benzotriazole-based ultraviolet absorbers such as dimethylbenzyl) phenyl} -2H-benzotriazole and 2- (2-hydroxy-5'-t-octylphenyl) benzotriazole; and dimethyl-1- (2-hydroxysuccinate). Ethyl) -4-hydroxy-2,2,6,6-tetramethylpiperidine polycondensate, 2,5-bis {5′-t
A hindered amine-based UV absorber such as -butylbenzooxazolyl (2) thiophene can be used.

The discoloration inhibitor is used to prevent discoloration of the active ingredient of the antibacterial and fungicide and to prevent discoloration of the belt. Examples of the discoloration inhibitor include disodium ethylenediaminetetraacetate and acetic acid. Chelating agents such as sodium hexametaphosphate can be used.

In mixing the above bis (2-pyridylthio-1-oxide) zinc constituting the antibacterial and fungicide composition with an ultraviolet absorber and a discoloration inhibitor in a resin or an adhesive treatment agent, and kneading or mixing them, According to the present invention, bis (2-pyridylthio-1-oxide) zinc is added to bis (2-pyridylthio-1-oxide) zinc in order to enhance the fluidity and dispersibility of these components and uniformly disperse or dissolve them in a resin or an adhesive treatment agent. An antibacterial and antifungal composition is prepared by adding a dispersing agent together with an agent. As the dispersant, calcium carbonate, talc, silicon dioxide, or the like can be used.

The antibacterial and fungicidal composition prepared as described above has a particle size of 50 μm passing through a 100-mesh sieve.
It is a powder of about 150 μm. Further, the composition ratio of the antibacterial and fungicide composition is not particularly limited, but a bis (2
(Pyridylthio-1-oxide) 100 parts by weight of zinc, 20 to 50 parts by weight of an ultraviolet absorber, 20 parts of discoloration inhibitor
The range is preferably from 50 to 50 parts by weight and from 100 to 400 parts by weight of the dispersant.

The front and back cover layers 3 and 4 have a hardness of 60 to 8 for improving cut resistance and preventing crush.
0 (JIS-A), 100% modulus as cover layer tensile strength is 5 MPa or less, and permanent set at 25% elongation is 4
%, And the thickness of the front and back cover layers is formed such that the thickness of the front cover layer is greater than the thickness of the back cover layer and the total belt thickness is 5 to 20 mm.

When the hardness of the cover layer is less than 60, the cover layer has a low hardness, so that the cover cannot be cut due to the elasticity of the cover even if a cutter blade bites in when cutting a fibrous material. On the other hand, when the hardness of the cover layer is 80 or more, the cover layer is too hard and does not disperse the stress even if the cutter blade bites, so that the cover layer is crushed.

On the other hand, when the 100% modulus is 5 MPa or more, the cover layer has a high hardness and a high elastic modulus, so that stress is not dispersed even if the cutter blade bites. Furthermore, 2
If the permanent set at 5% elongation is 4% or more, set of the cover layer is likely to occur due to the compressive force of the cutter blade.

Further, if the total thickness of the belt is less than 5 mm, the outer cover layer is too thin, so that the core body canvas is easily damaged when cutting the cut object, and the belt life caused by the core body canvas is shortened. On the other hand, if the total thickness of the belt is 20 mm or more, the flexibility is deteriorated due to the relationship with the pulley diameter.

FIG. 2 is a side view showing a state in which the resin belt for a cutting board of the present invention is used, and FIG. 3 is a sectional view taken along line NN of the holding roll portion shown in FIG. In FIG. 2, a resin belt 1 for a cutting board is suspended between a pair of drive pulleys 5 and a driven pulley 6, and spill prevention plates 7 are attached to both sides in the width direction of the belt. A roll 8 is installed, and a cutter blade 9 that moves up and down is mounted on the drive pulley 5.

An object to be cut is placed on the belt 1, and
When it is moved below the roller 8, the cutter blade 9 moves down at the same time as being pressed by the presser roll 8, and cuts the cut object.
The distance between the spill prevention plate 7 and the belt 1 is 3 mm in the vertical direction.
Are provided.

[0023]

Next, the effects of the present invention will be described based on specific examples. (Example 1) A resin belt for a cutting board according to the present invention is shown in FIG.
As shown in the figure, the belt body 1 has a belt allowable tension of 12 kg.
/ Ply of polyester fiber having a thickness of 5 mm, which is made of twill-woven polyester fiber having a thickness of 5 mm. The layer 3 and the back cover layer 4 having a thickness of 3 mm are laminated, and the total belt thickness is formed to be 10 mm. This cover has a hardness of 8 according to JIS-A.
The 0 and 100% modulus was 5.0 MPa, and the permanent set at 25% elongation was 2.9%.

Example 2 Example 1 had the same construction as that of Example 1 except for the material of the cover layer. The cover layer was made of a thermoplastic polyester polyester polyurethane, and the cover had a hardness of J.
IS-A: 73, 100% modulus is 3.4 MPa,
The permanent set at 25% elongation was 2.2%.

(Embodiment 3) As shown in FIG. 1, a 3-ply core body canvas 2 made of twill-woven polyester fiber having a belt allowable tension of 12 kg / cm is used as the core body canvas 2, For the core body canvas-side cover layer 3b and the back cover layer 4 which are layers, a polyester-based polyurethane of a thermoplastic resin having a hardness of 88 is used, each having a thickness of 0.5 m.
m and 3 mm.

The transport-side cover layer 3a, which is the first layer of the front cover layer 3, is made of the same polyester-based polyurethane as that used in Example 2. The cover has a hardness of 73 in JIS-A and a 100% modulus. The permanent set at 3.4 MPa, 25% elongation was 2.2%. The thickness of the transfer-side cover layer 3a made of the polyester-based polyurethane is 5 mm.
The belt was formed such that the total thickness of the belt became 10 mm.

An antibacterial and fungicide composition is added to these polyether-based and polyester-based polyurethane resins. Specifically, 100 parts by weight of bis (2-pyridylthio-1-oxide) zinc is used as an ultraviolet absorber.
30 parts by weight of (3-t-butyl-5-methyl-2-hydroxyphenyl) -5-chlorobenzotriazole and 20 parts of discoloration inhibitor disodium ethylenediaminetetraacetate were added.
An antibacterial and fungicide composition comprising 300 parts by weight of calcium carbonate as a dispersing agent and 0.2 part by weight of a polyether-based polyurethane resin and a polyether-based polyurethane resin are dry-blended and heated. Then, the mixture was plasticized and formed into a sheet by an extruder to produce a pellet. The pellet was put into another extruder and extruded into a sheet.

On the other hand, the conventional resin belt for cutting board is a white nitrile rubber belt as a comparative example (1), which is a 2-ply core body canvas 2 made of polyester fiber having a total strength of 100 kg / cm. On the front and back sides of the canvas 2, a front cover layer of nitrile rubber having a thickness of 5.0 mm and a back cover layer having a thickness of 3.0 mm are laminated as cover layers, and the total belt thickness is formed to be 10 mm. Further, the centerless belt of Comparative Example (2) is formed of thermosetting urethane as a main material and has a total belt thickness of 15 mm.

The resin belt for cutting board was evaluated using each of the above belts. First, as a static evaluation of a belt, a cover hardness, a cover tensile strength, a permanent distortion, a cut property of a cut object, a cover dust generation state, and a food sanitation test based on the Food Sanitation Law were performed. To evaluate the cutability of the cut material, a cutter blade was attached to the load cell portion of the autograph, and the total thickness of each belt was 50 mm wide and 150 m long.
The load when the cutter blade was digged into the sample of 2 m by 2 mm was measured.

The state of generation of cover dust was evaluated separately for a case where the biting amount of the cutter blade was constant (biting amount 2 mm) and a case where the biting pressure was constant (pressure 9.6 KN / m). . In addition, the food hygiene test was performed by the Ministry of Health and Welfare Notification No. 20, FDA177-2700 extraction test.

The results of the static evaluation of each belt under the above conditions are shown in Table 1 below.

[0032]

[Table 1]

As is evident from the results, the belt of the present invention passed the food hygiene test as compared with the conventional belt, and it was confirmed that the belt had almost no problem with respect to cut resistance and occurrence of burrs.

[0034]

As described above, in the resin belt for a cutting board of the present invention, the front and back cover layers are made of a thermoplastic resin, and the characteristics of this cover layer are limited so that the front cover layer is thicker than the back cover layer. And by being antibacterial and antifungal,
A resin belt for boards that passed the food hygiene test, eliminated defective cuts of the cut material, and at the same time, hardly generated burrs during cutting was obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view of a resin belt for a cutting board according to the present invention.

FIG. 2 is a side view showing a usage state of the resin belt for cutting board of the present invention.

FIG. 3 is a sectional view taken along line NN of FIG. 2;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Resin belt for cutting board 2 Core body canvas 3 Front cover layer 3a Transport side cover layer 3b Core body canvas side cover layer 4 Back cover layer 5 Drive pulley 6 Driven pulley 7 Side plate 8 Pressing roll 9 Cutter blade

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masayuki Kawaguchi 4-1-1, Hamazoe-dori, Nagata-ku, Kobe-shi, Hyogo Inside Mitsuboshi Belting Co., Ltd. (72) Inventor Yoshinori Furukawa 4-1-1, Hamazodori, Nagata-ku, Kobe-shi, Hyogo No. 21 Mitsuboshi Belting Co., Ltd.

Claims (5)

[Claims] 1. A conveying resin belt in which the front and back cover layers of a heart-shaped canvas are made of a resin layer, wherein the front and back cover layers are made of a thermoplastic resin, and the front cover layer is thicker than the back cover layer and has antibacterial and antifungal properties. A resin belt for a cutting board. 2. The resin belt for a cutting board according to claim 1, wherein the total belt thickness is 5 to 20 mm. 3. The resin belt for a cutting board according to claim 1, wherein the thermoplastic resin is one of a polyether-based urethane and a polyester-based polyurethane. 4. The front cover layer has a hardness of 6 according to JIS-A.
0 to 80, 100% modulus is 5 MPa or less and 25
The resin belt for a cutting board according to claim 1, wherein a permanent set at the time of% elongation is 4% or less. 5. The front cover layer has a two-layer structure, and the hardness of the transport-side cover layer is 60 to 80, 100, JIS-A.
The resin belt for a cutting board according to claim 1, wherein the% modulus is 5 MPa or less, the permanent strain at the time of 25% elongation is 4% or less, and the hardness of the remaining cover layer on the core body canvas is 80 to 90 according to JIS-A. .