Sealing material for the equipment

Abstract

The present invention aims to provide a sealing material for a tool that can reduce noise so as not to cause discomfort to the user when the tool is pulled out from its wound state during use. [Solution] A sealing material wound in a roll for sealing tools in pairs, comprising a base material and an adhesive layer disposed on one side of the base material, wherein the adhesive layer is obtained by the reaction of a polyol compound, a polyamine compound and a polyisocyanate compound, and is a product in which urethane bonds and urea bonds coexist, The problem could be solved by using a sealing material for the device in which the blending ratio of the polyol compound and the polyamine compound is such that the polyol compound / polyamine compound = 0.5 to 3.0.

Description

Technical Field

[0001] The present invention relates to a sealing material for sealing used diapers, unused syringes, infusion bags, drip devices, used syringes, drip devices, pouches connected to stomas, and other childcare tools, nursing care tools, and medical tools.

Background Art

[0002] In general households, hospitals, nursing care and welfare facilities, etc., various childcare tools, nursing care tools, and medical tools such as disposable diapers for infants, syringes for patients, etc. are used.

[0003] For example, usually used diapers are put into a plastic bag such as a supermarket bag, the mouth is tied, and they are stored in a garbage bag or a trash can until the garbage collection day. Therefore, an unpleasant odor may be generated from the stored used diapers until the garbage collection day. For this reason, there has been proposed a device that inputs used diapers and seals each diaper with a film-like sealing base material.

[0004] For example, in Patent Document 1, a sealing base material for a tool in which an adhesive layer made of a polyurethane resin is laminated and integrated on one side of a coating base material, and the tool is wound in a roll shape with this adhesive layer on the inside. By pulling out the adhesive layer to the inside and pressing it from the outside, the adhesive layers are adhered to each other, and the tool is wrapped with the coating base material and sealed with the adhesive layer. A sealing base material having gas barrier properties by the coating base material and the adhesive layer is disclosed.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, the sealing substrate described in Patent Document 1 had the problem of generating a loud crackling noise when it was pulled out from its wound state during use.

[0007] Therefore, the present invention aims to provide a sealing material for a tool that can reduce noise so as not to cause discomfort to the user when the tool is pulled out from its wound state during use. [Means for solving the problem]

[0008] [1] That is, the sealing material for the tool disclosed herein is a sealing material wound in a roll shape to seal a tool in pairs, comprising a base material and an adhesive layer disposed on one side of the base material, wherein the adhesive layer is obtained by the reaction of a polyol compound, a polyamine compound and a polyisocyanate compound, and is a product having both urethane bonds and urea bonds, The sealing material for tools is characterized in that the blending ratio of the polyol compound and the polyamine compound is such that the polyol compound / polyamine compound = 0.5 to 3.0.

[0009] [2] The sealing material for the device described in [1] is characterized in that the polyol compound is an aliphatic compound.

[0010] [3] The sealing material for the device described in [1] above, characterized in that the polyol compound is at least one of a polyester polyol or a polyether polyol.

[0011] [4] The sealing material for the device described in [1] is characterized in that the peeling force in a T-shaped peel test after bonding the adhesive layers together and leaving them for 1 to 20 minutes is 8.0 N or more.

[0012] [5] The sealing material for the device according to either [1] or [2] above is characterized in that the peeling sound measured at a distance of 100 mm when it is pulled out at a speed of 200 to 1000 mm / s from a state in which it has been wound with a width of 50 mm is less than 60 dB. [Effects of the Invention]

[0013] The sealing material for the device according to the present invention can reduce noise so as not to cause discomfort to the user when the device is pulled out from its wound state during use. [Brief explanation of the drawing]

[0014] [Figure 1] This is a schematic diagram showing the state in which the sealing material of the device according to the present invention is being used. [Figure 2] This is a perspective view showing a sealing material for a tool according to one embodiment of the present invention. [Figure 3] This is a cross-sectional view showing a sealing material for a tool according to one embodiment of the present invention. [Modes for carrying out the invention]

[0015] The sealing material of the tool according to the embodiment of the present invention will be described in detail below with reference to the drawings. The embodiments described below are preferred examples for carrying out the present invention and therefore have various technical limitations. However, the present invention is not limited to these embodiments unless specifically stated in the following description to limit the invention. In the description, the vertical direction or up-and-down direction refers to the up-and-down direction in Figure 1. Furthermore, the symbol "~" indicates a range that includes both an upper and lower limit.

[0016] The sealing material 1 of the present invention is used as follows. That is, as shown in Figure 1, first, a pair of sealing materials 1,1 wound in a roll shape are inserted onto a pivot shaft 2, and a pair of crimping rolls 3,3 located below them rotate, supplying each sealing material 1 downward so that they face each other. Then, the adhesive layers 11 of the sealing materials 1,1 adhere to each other due to the rotation and pressing force of the crimping rolls 3,3, and the pair of sealing materials 1,1 are combined. At this time, when a tool 4 is inserted into the device from above, because the surface of the crimping rolls 3,3 is sponge-like, the pair of sealing materials 1,1 are pressed to sandwich the tool 4, adhere to each other, and when pushed downwards by the crimping rolls 3,3, the tool 4 is sealed. Preferably, the tool 4 sealed by the pair of sealing materials 1,1 is cut into one or more pieces by cutting the sealing material 1 with a cutting mechanism 5 equipped with a cutting blade.

[0017] The sealing material 1 of the present invention comprises, in its structure, a film-like base material 10 and an adhesive layer 11 disposed on one side of the base material 10.

[0018] The base material 10 is formed from a film-like resin and is a component that forms the framework of the sealing material 1, preventing the contents of the tool 4 from leaking out of the sealing material 1 and preventing odors from leaking out.

[0019] Specifically, it is preferable to use unoriented polypropylene (CPP), stretched polypropylene (OPP), high-pressure low-density polyethylene (LDPE), linear short-chain branched polyethylene (LLDPE), or medium-pressure high-density polyethylene (HDPE) as the base material 10. Furthermore, one of these materials can be used, or multiple materials can be laminated or mixed together.

[0020] The thickness of the base material 10 is preferably 5 to 100 μm, and more preferably 10 to 50 μm. When the thickness of the base material 10 is within this range, it is possible to prevent the contents of the tool 4 from leaking through the base material 10 or odors from leaking out when the tool 4 is sealed.

[0021] The adhesive layer 11 is a product obtained by reacting a polyol compound, a polyamine compound, and a polyisocyanate compound, in which urethane bonds and urea bonds coexist, and is a polyisocyanate compound with a mixing ratio of polyol compound / polyamine compound = 0.5 to 3.0. Note that the above mixing ratio is the ratio in terms of amount of substance. The urethane bond is a bond formed by the reaction of the hydroxyl group of the polyol compound and the isocyanate group of the polyisocyanate compound, and the urea bond is a bond formed by the reaction of the amino group of the polyamine compound and the isocyanate group of the polyisocyanate compound. With the adhesive layer 11 in which these urethane bonds and urea bonds coexist, when the pair of sealing materials 1·1 sandwich and seal the tool 4 and are pulled out from the wound state during use, noise can be reduced so that the user does not feel discomfort.

[0022] In the present invention, as the polyol compound that is a raw material for forming the adhesive layer 11, an aliphatic polyester polyol obtained by reacting an aliphatic dibasic acid such as succinic acid, adipic acid, sebacic acid, azelaic acid, phthalic acid, dimer acid, etc. with an aliphatic polyhydric alcohol such as ethylene glycol, 1,4-butylene glycol, 1,6-hexanediol, propylene glycol, neopentyl glycol, 3-methyl-1,5-pentanediol, diethylene glycol, 1,4-cyclohexanediol, 1,4-cyclohexanedimethanol, 4,4'-bicyclohexanol, etc., or an aliphatic polyol such as polytetramethylene ether glycol, 1,4-butylene glycol, 1,6-hexanediol, etc. is preferred. Also, the weight average molecular weight of such an aliphatic polyester polyol or aliphatic polyol is preferably 200 to 3000, and more preferably 500 to 2500. These polyol compounds can be used alone or in combination of two or more. When the polyol compound is these compounds, when the sealing material 1·1 is pulled out from the wound state and the adhesive layer 11 peels off from the adjacent base material 1, the stress generated is relaxed by the movement of the molecular chains in those compounds, so that noise can be more effectively suppressed.

[0023] In the present invention, as the polyamine compound serving as the raw material for forming the adhesive layer 11, aliphatic polyamines such as ethylenediamine, 1,2-diaminopropane, 1,2-diaminohexane, 1,4-diaminohexane, 1,6-diaminohexane, 3,3'-diaminodipropylamine, alicyclic polyamines such as isophoronediamine, 1,4-cyclohexanediamine, 1,3-bis(aminomethyl)cyclohexane, 1,3-bis(aminomethyl)cyclohexane, 1,4-bis(aminomethyl)cyclohexane, or aromatic polyamines such as diphenylmethanediamine, p-xylenediamine, 1,5-diaminonaphthalene are preferred. These polyamine compounds can be used alone or in combination of two or more.

[0024] In the present invention, as the polyisocyanate compound serving as the raw material for forming the adhesive layer 11, aliphatic polyisocyanates such as hexamethylene diisocyanate, alicyclic polyisocyanates such as isophorone diisocyanate, 1,4-dicyclohexylmethane diisocyanate, 1,3-bis(isocyanatomethyl)cyclohexane, norbornene diisocyanate, or aromatic polyisocyanates such as m-xylene diisocyanate, p-phenylene diisocyanate, naphthalene 1,5-diisocyanate, o-toluidine diisocyanate are preferred. These polyisocyanate compounds can be used alone or in combination of two or more.

[0025] The molar ratio of the polyol compound to the polyamine compound is preferably polyol compound / polyamine compound = 0.5 to 3.0, and more preferably polyol compound / polyamine compound = 0.6 to 2.0. When the molar ratio of the polyol compound and polyamine compound is within this range, a pair of sealing materials 1·1 can tightly seal the tool 4, and noise can be reduced so as not to cause discomfort to the user when the sealing material 1 is pulled out from its wound state. When the mixing ratio of the polyol compound and polyamine compound is within the above range, it is preferable that the adhesive layer 11 is formed using a polyisocyanate compound in an amount approximately equal to the total amount of polyol compound and polyamine compound.

[0026] The weight-average molecular weight of the adhesive layer 11 formed in this way is preferably 300 to 1,000,000, and more preferably 500 to 1,000,000.

[0027] The thickness of the adhesive layer 11 is preferably 1 to 30 μm, and more preferably 5 to 20 μm. When the thickness of the adhesive layer 11 is within this range, it is possible to prevent the contents of the tool 4 from leaking through the adhesive layer 11 or odors from leaking out when the tool 4 is sealed. [Examples]

[0028] Specific examples are shown below, but the present invention is not limited to these examples. In addition, unless otherwise specified, the units of the amounts of each component in the tables in the examples are "weight percent".

[0029] <Example 1> As a base material, unoriented polypropylene (CPP) with a thickness of 25 μm was used, and a 10 μm adhesive layer, described later, was laminated on one side to prepare a sealing material. Specifically, the adhesive layer was obtained by reacting an aliphatic polyester polyol, which is obtained by condensing adipic acid and 1,6-hexanediol as a polyol compound and has a weight-average molecular weight of about 2000, with isophorone diamine as a polyamine compound and hexamethylene diisocyanate as a polyisocyanate compound, with a molar ratio of polyol compound:polyamine compound = 3:2, i.e., polyol compound / polyamine compound = 1.5, with approximately the same amount of polyisocyanate compound as the total amount of polyol compound and polyamine compound. The resulting product has a weight-average molecular weight of about 70,000 to 80,000 and contains both urethane and urea bonds.

[0030] <Examples 2-10> As shown in Tables 1 and 2, a encapsulant was prepared in the same manner as the encapsulant of Example 1, using the polyester polyol of Example 1 or a polyether polyol such as polytetramethylene ether glycol as the polyol compound, isophorone diamine or diphenylmethanediamine of Example 1 as the polyamine compound, and hexamethylene diisocyanate or m-xylylene diisocyanate of Example 1 as the polyisocyanate compound, with the blending ratios of the polyol compound and polyamine compound as shown in Tables 1 and 2, respectively.

[0031] <Comparative Examples 1-4> As shown in Table 3, a polyester polyol was used as the polyol compound, the same as in Example 1; isophorone diamine was used as the polyamine compound, the same as in Example 1; and hexamethylene diisocyanate was used as the polyisocyanate compound, the same as in Example 1. The mixing ratio of the polyol compound and the polyamine compound was as shown in Table 3, and a sealing material was prepared in the same manner as the sealing material of Example 1.

[0032] [Sneeze Test] The peeling noise when unwinding the sealing material prepared in each example and comparative example was evaluated. Specifically, the evaluation was performed using the following method. First, one pair of 50 mm wide sealing materials prepared in each example and comparative example, wound into a roll, were placed in the sealing device shown in Figure 1 under a room temperature of 25°C and a humidity of 50% RH. Then, one end of each sealing material was pulled out at a predetermined speed, and the noise was measured at a distance of 100 mm from the sealing device using a standard noise meter (manufactured by Ono Sokki Co., Ltd., model: LA-220S). The speeds at which one end of the sealing material was pulled out were 200 mm / s and 1000 mm / s. At this time, if the noise level was less than 60 dB at any speed, it was judged to be normal or quiet and good, and if it was 60 dB or more, it was judged to be noisy and poor.

[0033] [Peel force test] The peel force when a pair of sealants were bonded together was evaluated using the sealants prepared in each example and comparative example. Specifically, the evaluation was performed using the following method. First, under room temperature of 25°C and humidity of 50%RH, a peel margin was created on the sealants and the adhesive sides were bonded together with a 2kg roller (bonding speed: 300±30mm / min, 1 back and forth). Then, at predetermined times of 1 minute and 20 minutes after bonding, the bonded sealants were slightly peeled apart, each was held in the upper and lower grips, and measured using an Autograph (Shimadzu Corporation, model: AGS-X 100N) in a T-shape. At any time, if the value was 8.0N or higher, the tool was judged to be properly sealed and no contents or odors would leak to the outside, and it was judged to be good. If the value was less than 8.0N, the tool was judged to be poor, as there was a risk that the contents or odors would leak to the outside because the tool was not properly sealed. Then, one end of each sealant was pulled out, and the adhesive layers of each were bonded together. After a predetermined time, the peeling force was measured in accordance with the T-type peeling method of JIS K 6854-3:1999. The predetermined time for measurement was 1 minute and 20 minutes after bonding.

[0034] [Rewind test] The peeling force when peeling off one layer of a double-layered sealant was evaluated using the sealants prepared in each example and comparative example. Specifically, the evaluation was performed using the following method. First, the double-layered sealant was attached to a measurement plate using a 2kg roller under room temperature of 25°C and humidity of 50% RH. (Attachment speed: 300±30mm / min, 1 round trip) The sealant was attached straight so that it was in the center of the measurement plate, and the top layer of one end of the sealant was folded back, while the other end was folded back to the reverse side. The peeling force when the top layer was peeled off was measured using an Autograph (Shimadzu Corporation, model: AGS-X 100N). No specific time was set for the measurement.

[0035] For each example and comparative example, those that performed well in all three tests—the peeling sound test, the peeling force test, and the unwinding test—were ultimately judged as good, while those that performed poorly in even one test were ultimately judged as poor. The composition of the sealing material and the results of the performance evaluation for each example and comparative example are shown in Tables 1 to 3.

[0036] [Table 1]

[0037] [Table 2]

[0038] [Table 3]

[0039] As shown in Tables 1 to 3, in a roll-wound sealing material that seals a tool in pairs, comprising a base material and an adhesive layer disposed on one side of the base material, it was found that by setting the mixing ratio of the polyol compound and the polyamine compound within a predetermined range, the tool is securely sealed, there is no risk of contents or odors leaking to the outside, and noise can be reduced so as not to cause discomfort to the user. [Explanation of Symbols]

[0040] 1. Sealing material 10...Base material 11...adhesive layer 2. Rotating shaft 3. Crimping Roll 4...tools 5... Cutting mechanism

Claims

1. A sealing material wound in a roll to seal a pair of tools, The system comprises a base material and an adhesive layer disposed on one side of the base material. The adhesive layer is obtained by the reaction of a polyol compound, a polyamine compound, and a polyisocyanate compound, and is a product in which urethane bonds and urea bonds coexist. A sealing material for a device, characterized in that the blending ratio of the polyol compound and the polyamine compound is such that the polyol compound / polyamine compound = 0.5 to 3.

0.

2. The sealing material for the device according to claim 1, characterized in that the polyol compound is an aliphatic compound.

3. The sealing material for a device according to claim 1 or 2, characterized in that the polyol compound is at least one of a polyester polyol or a polyether polyol.

4. The sealing material for the device according to claim 1, characterized in that the peeling force in a T-shaped peel test after bonding the adhesive layers together and leaving them for 1 to 20 minutes is 8.0 N or more.

5. The sealing material for a tool according to claim 1 or 2, characterized in that the peeling sound measured at a distance of 100 mm is less than 60 dB when it is pulled out at a speed of 200 to 1000 mm / s from a state in which it has been wound with a width of 50 mm.

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