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Antibacterial and mildewproofing sheet

A technology of antibacterial and antifungal, antibacterial and antifungal agent, applied in the fields of food preservation, food science, application, etc., can solve the problems of rising viscosity of mixture, unable to exert, unable to ensure coating amount, etc., to achieve the effect of easy manufacture and inhibition of release

Inactive Publication Date: 2012-05-23
UNION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, when allyl isothiocyanate is generally contained in polyurethane resin as described in Patent Document 1, if a polyurethane resin using low-molecular-weight isocyanate is used, the viscosity will be greatly reduced by mixing with allyl isothiocyanate.
When the mixture is to be coated on a film in such a low-viscosity state, a method such as gravure coating can be used, but since the viscosity is too low, the following problems will occur: the necessary coating amount cannot be ensured, or Roll misalignment when laminating and crimping between films, or the mixture leaks from the lamination section until the viscosity of the mixture rises
Therefore, after refrigerated and frozen storage, it is heated with an electric stove with food, and when it is intended to exert the antibacterial and antifungal effect in the heated state, allyl isothiocyanate has already been released, and there is a time when it is necessary to make it exert its antibacterial and antifungal effect. When the antibacterial and antifungal effects cannot be achieved
[0010] On the other hand, as described in Patent Document 2, since the rosin sheet is easily melted by heat, when used as a cover sheet for a tableware, there is a problem that once it is heated with an electric stove or the like together with food, , the rosin melts, and the resin leaks from the cross-section of the sheet and adheres to the food

Method used

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  • Antibacterial and mildewproofing sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083]The first aromatic isocyanate-based urethane prepolymer, high-molecular-weight polyether-based polyol, and allyl isothiocyanate are mixed in a weight mixing ratio of 75:10:15, and the viscosity at 40°C is 1040mPa·s antibacterial and antifungal mixture. At this time, the viscosity was measured using a B-type viscometer manufactured by Tokimac Corporation. Using a non-solvent laminator manufactured by Fuji Machinery Co., Ltd., on PET#25 at 1.8g / m 2 Apply the antibacterial and antifungal mixture to form an antibacterial and antifungal agent layer. On the opposite face of PET#25 of this antibacterial and antifungal agent layer, stick OPP#20, obtain the antibacterial and antifungal sheet that is formed by 3 layers, the surface layer is the allyl isothiocyanate permeable film.

[0084]

[0085] Put 100 pieces of the obtained antibacterial and antifungal sheets into alumina bags and seal them, and store them in a thermostat at 40°C for 1 month. Under the conditions, the co...

Embodiment 2

[0104] Mix the second aromatic isocyanate-based urethane prepolymer and allyl isothiocyanate at a weight mixing ratio of 80:20 to produce an antibacterial and antifungal mixture with a viscosity of 1290 mPa·s at 40°C . At 40°C, the antibacterial and antifungal mixture was added at 1.8g / m 2 The coating amount is coated on PET#25 to form an antibacterial and antifungal agent layer. Paste OPP#20 on the opposite side of the PET#25 of the antibacterial and antifungal agent layer, and place it at 40°C for 2 days to harden the antibacterial and antifungal agent layer to form a three-layer structure, the surface layer of which is made of isosulfur An antibacterial and antifungal sheet made of an allyl cyanate permeable film and a polyethylene terephthalate film that is an allyl isothiocyanate adsorption film. The same measurement as in Example 1 was performed on this sheet. The results are shown in Tables 1-4.

Embodiment 3

[0106] Use the antibacterial and antifungal sheet of embodiment 1 of the rectangle of vertical 70mm * horizontal 100mm, utilize (have) the continuous vacuum molding machine HVF that terra dakikai makes, make deep 10mm figure 2 The container of the shape (b) was subjected to the release test after heating and the antibacterial property test in the test of Example 1. The results are shown in Tables 3 and 4.

[0107] (result)

[0108] In the room temperature storage test, the sheets of Examples 1 and 2 maintained about 80% after 24 hours at 30°C regardless of the type of urethane prepolymer. All internal allyl isothiocyanate was released (Table 1).

[0109] In the cryopreservation test, compared with the environment at 30°C, the release rate decreased significantly. Compared with the tablet of Comparative Example 1, which released all the allyl isothiocyanate within 30 days, the tablets of Examples 1 and 2 were released within 30 days. More than 70% of allyl isothiocyanate wa...

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Abstract

The invention produces an easily producible antibacterial and mildewproofing sheet releasing allyl isothiocyanate over a long period without thermally melting even by heating with a microwave oven, suppressing the releasing quantity of the allyl isothiocyanate when keeping in a refrigerator a freezer, and exhibiting antibacterial and mildewproofing effect releasing a sufficient amount of the allylisothiocyanate after heating at low cost and with high producing efficiency. The allyl isothiocyanate is mixed with a urethane resin using an isocyanate-based urethane prepolymer having 500-10,000 molecular weight and an antibacterial and mildewproofing layer prepared by regulating the viscosity to take a value of 600 mPa.s to 2,500 mPa.s at any temperature of 40 to 60 DEG C is sandwiched betweenother layers. Thereby, a laminated sheet in which at least another sheet is an allyl isothiocyanate absorbing film is produced.

Description

technical field [0001] The present invention relates to an antibacterial and antifungal sheet using allyl isothiocyanate. Background technique [0002] It is known that allyl isothiocyanate, which is a main component of behenicum and mustard, has antibacterial and antifungal effects. Various antibacterial and antifungal materials such as films or sheets that contain this allyl isothiocyanate and can exert antibacterial and antifungal effects by gradually releasing it are being studied. [0003] For example, Patent Document 1 describes a polyurethane resin sheet in which allyl isothiocyanate is contained in a polyurethane resin composed of polyfunctional isocyanate and polyalcohol. [0004] In addition, Patent Document 2 describes a volatile drug releasing sheet in which a gas permeable layer is laminated on both surfaces of a mixture layer containing allyl isothiocyanate in rosin or rosin ester. [0005] [Patent Document 1] Japanese Patent Laid-Open No. 9-151317 [0006] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/40A23L3/3526C08L75/04A23B4/00
CPCB32B27/08B32B27/36B32B2307/7145C08J5/18C08L75/04
Inventor 龟井清田岛宏邦
Owner UNION CORP