Packaging materials and water supply fittings packaging

Abstract

To provide a packaging material that can suppress the deformation of polyvinyl chloride-containing components in water supply fittings. [Solution] A packaging material for packaging a water supply fitting that includes a component containing at least a portion of polyvinyl chloride, wherein the packaging material has a light-shielding rate of 75% or more and is water-resistant.

Description

Technical Field

[0001] The present disclosure relates to a packaging material and a water supply joint package.

Background Art

[0002] As a water supply joint used for connecting an existing water supply pipe and a resin pipe in a house or the like, for example, an O-ring and a pipe holding ring (collet) are inserted into the inner surface of one end of a metal pipe joint base, and a cap is used to prevent it from coming off. A joint that stops water and holds the inserted pipe with an O-ring and a collet is used.

[0003] For example, in Patent Document 1, there is disclosed a connection joint adapter for connecting an existing pipe and a resin pipe, wherein one end of the adapter has a shape that can be inserted into a pipe joint having a water stopping function and a pipe holding function, and the other end of the adapter has a shape that can be inserted into an existing pipe.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, in a building such as a house, in a water supply joint used for connecting an existing water supply pipe and a resin pipe, a member containing vinyl chloride may be used at the contact portion with the existing pipe. However, in a water supply joint including a member containing vinyl chloride at least partially, deformation may occur in the vinyl chloride, which may cause an obstacle to the connection with the existing pipe.

[0006] Therefore, the present disclosure aims to provide a packaging material and a water supply fitting packaging body that can suppress the deformation of polyvinyl chloride-containing components in water supply fittings. [Means for solving the problem]

[0007] The means for solving the above problems include the following embodiments. The first embodiment is a packaging material for packaging a water supply fitting that includes a component containing at least a portion of polyvinyl chloride, The light-blocking rate is 75% or more. Water-resistant, It is packaging material. A second embodiment is the packaging material according to the first embodiment, having a laminated film containing an aluminum layer. A third embodiment is characterized in which the laminated film has a resin inner layer containing resin, which is disposed on the inner side of the aluminum layer and in contact with the water supply fitting, The packaging material according to the second embodiment, wherein the resin inner layer contains a polyolefin resin as the resin. A fourth embodiment is a packaging material according to any one of the first to third embodiments, which is bag-shaped and large enough to pack one of the water supply fittings. A fifth aspect is a water supply fitting that includes a member containing at least a portion of polyvinyl chloride, A packaging material for packaging the aforementioned water supply fitting, as described in any one of the first to fourth embodiments, This is a water supply fitting package that has [the following characteristics]. [Effects of the Invention]

[0008] According to this disclosure, a packaging material and a water supply fitting packaging body are provided that can suppress the deformation of polyvinyl chloride-containing components in water supply fittings. [Modes for carrying out the invention]

[0009] An example of an embodiment of this disclosure will be described. These descriptions are illustrative of embodiments and do not limit the scope of the invention. In this specification, numerical ranges represented by "~" mean a range that includes these values ​​as the lower and upper limits. In the numerical ranges described stepwise within this specification, the upper limit of one stepwise numerical range may be replaced with the upper limit of another stepwise numerical range. Similarly, the lower limit of one stepwise numerical range may be replaced with the lower limit of another stepwise numerical range.

[0010] Each component may contain multiple types of the relevant substance. When referring to the amount of each component in a composition, if there are multiple substances corresponding to each component in the composition, unless otherwise specified, it refers to the total amount of those multiple substances present in the composition.

[0011] <Packaging materials> The packaging material according to the embodiments of this disclosure (hereinafter also simply referred to as "the packaging material of this disclosure") is a packaging material for packaging a water supply fitting that includes a component containing at least a portion of polyvinyl chloride. Furthermore, the above-mentioned packaging material has a light-blocking rate of 75% or more and is water-resistant.

[0012] In buildings such as houses, water supply fittings are used to connect existing water supply pipes with resin pipes. When the connection point between the existing pipe and the fitting contains polyvinyl chloride (PVC), the contact point between the fitting and the existing pipe also uses a PVC-containing component for strength and other considerations. However, in water supply fittings that contain at least a portion of a component containing PVC (hereinafter also simply referred to as "PVC component"), deformation of the PVC component has occurred, causing problems with connection to the existing pipe.

[0013] When the inventors investigated the cause of this deformation, they found that water supply fittings, while still packaged in packaging materials, are sometimes left outdoors in direct sunlight for extended periods at construction sites and other locations. In other words, they found that the temperature inside the packaging material rises due to direct sunlight, reaching high temperatures such as 80°C or higher, which causes the polyvinyl chloride material to soften and deform.

[0014] In contrast, the packaging material of the present disclosure has a light-shielding rate of 75% or more and has water resistance. By having a light-shielding rate of 75% or more, even when left outdoors under direct sunlight for a long time, the penetration of sunlight into the interior of the packaging material is suppressed, and the rise in the internal temperature is suppressed. As a result, the softening of the vinyl chloride member is suppressed, and the deformation of the vinyl chloride member is suppressed.

[0015] Also, when the packaging material does not have water resistance, when left outdoors during rainy weather, at least a part of the packaging material will be burned out (for example, melted or broken). When left under the scorching sun in a state where at least a part of the packaging material has been burned out, the vinyl chloride member at the joint may soften and deform. On the other hand, since the packaging material of the present disclosure has water resistance, the burning out of the packaging material is suppressed even when left outdoors during rainy weather. As a result, even when left under the scorching sun after a rainy day, the softening of the vinyl chloride member at the joint is suppressed, and the deformation of the vinyl chloride member is suppressed.

[0016] (Light-shielding rate) The packaging material of the present disclosure has a light-shielding rate of 75% or more. By the light-shielding rate of the packaging material being within the above range, even when left outdoors under direct sunlight for a long time, the rise in the internal temperature is suppressed, and the deformation of the vinyl chloride member at the joint is suppressed. The light-shielding rate is preferably further 80% or more, and more preferably 90% or more.

[0017] The measurement of the light-shielding rate is carried out by the method described in JIS L1055 (2009). That is, light is irradiated on the surface of the test piece using a light source, and the light-shielding rate (%) is calculated by measuring the amount of light passing through the test piece with an illuminometer installed on the opposite side.

[0018] (Water resistance) The packaging material of the present disclosure has water resistance. Since the packaging material has water resistance, even when left outdoors in rainy weather, the packaging material is suppressed from burning out. As a result, even if it is left under the scorching sun after rain, deformation of the vinyl chloride member at the joint is suppressed.

[0019] The measurement of water resistance is carried out by the method described in JIS L1092 (2020). That is, a water pressure is applied to the test piece at a pressure increase rate of 10 cm / min, and the water pressure at the time when 3 drops of water come out is measured. When the value of this water pressure is 2000 mm or more, it is determined to have water resistance.

[0020] (Material) Examples of the material used for the packaging material of the present disclosure, that is, a material having a light shielding rate of 75% or more and water resistance, include the following materials. (1) Aluminum laminated film (2) White resin film Hereinafter, these materials will be described respectively.

[0021] (1) Aluminum laminated film The packaging material of the present disclosure preferably has a laminated film including an aluminum layer (also simply referred to as "aluminum laminated film" in the present disclosure). By including an aluminum layer, the light shielding rate can be increased, and for example, the light shielding rate can be made 100%. In addition, water resistance is obtained by the aluminum layer. Furthermore, by including an aluminum layer, the thermal conductivity can be increased, and the heat inside the packaging material can be easily released to the outside (that is, it is difficult for heat to accumulate inside). As a result, deformation of the vinyl chloride member at the joint is more suppressed.

[0022] Furthermore, the aluminum laminated film has an aluminum layer, and at least one of the other layers is laminated on either the inner side (i.e., the side where the joint is packaged) or the outer side (i.e., the side facing the outside when the joint is packaged) of the aluminum layer. Preferably, the aluminum laminated film has an inner layer (resin inner layer) containing a fusion-adhesive resin on at least the inner side of the aluminum layer. Having an inner layer containing a fusion-adhesive resin allows the inner surfaces to be fused together and sealed when the joint is packaged with the aluminum laminated film.

[0023] Examples of fusion-compatible resins include polyolefin resins such as polyethylene, and polyethylene terephthalate (PET). Among these, polyolefin resins are preferred from the viewpoint of fusion properties, and polyethylene is more preferred.

[0024] In this context, the vinyl chloride component in the joint often contains a plasticizer. Examples of plasticizers contained in the vinyl chloride component include phthalate esters, with 2-ethylhexyl phthalate being particularly preferred. However, when a joint having a vinyl chloride member containing a plasticizer is packaged with packaging material having a resin inner layer, the plasticizer in the vinyl chloride member may migrate to the resin inner layer that comes into contact with the vinyl chloride member. When the plasticizer migrates from the vinyl chloride member to the resin inner layer, discoloration and softening may occur in both the vinyl chloride member and the resin inner layer. Therefore, when a vinyl chloride member contains a plasticizer, it is preferable to use a resin with low affinity for the plasticizer in the resin inner layer from the viewpoint of suppressing the migration of the plasticizer to the resin inner layer. Examples of resins with low affinity for plasticizers that are preferable to include in the resin inner layer include polyolefin resins (more preferably polyethylene).

[0025] From the viewpoint of protecting the aluminum layer, the aluminum laminated film may have a resin outer layer containing resin on the outer side of the aluminum layer. Examples of resins in the resin outer layer include polyethylene terephthalate (PET) and polypropylene (PP). Among these, PET is preferred from the viewpoint of protection.

[0026] The aluminum laminated film is preferably a three-layer film having an aluminum layer, an inner resin layer on the inner side of the aluminum layer, and an outer resin layer on the outer side.

[0027] The average thickness of the aluminum layer is preferably, for example, 3 μm to 20 μm, and more preferably 5 μm to 10 μm. The average thickness of the inner surface layer of the resin is preferably, for example, 10 μm to 50 μm, and more preferably 20 μm to 40 μm. The average thickness of the outer resin layer is preferably, for example, 5 μm to 20 μm, and more preferably 8 μm to 15 μm. By ensuring that the average thicknesses of the aluminum layer, the inner resin layer, and the outer resin layer in the aluminum laminate film are within the above ranges, the flexibility of the aluminum laminate film is enhanced. As a result, the gap between the aluminum laminate film and the contents being packaged (i.e., the water supply fittings) is reduced, making it less bulky, which increases the number of items that can be packed in a box and improves transportation efficiency. Note that the average thickness of each layer refers to the arithmetic mean of the thicknesses at 10 arbitrarily selected locations.

[0028] (2) White resin film The packaging material of this disclosure preferably has a white resin film. Having a white resin film increases the light-shielding rate. Furthermore, water resistance can be obtained by selecting the type of resin.

[0029] The white resin film may consist of only a single layer of white resin, or it may consist of a laminate of a white resin layer and other resin layers. For the white resin layer, for example, a resin film made by adding a white pigment to a general-purpose resin that has water resistance can be used.

[0030] The white resin film may have an inner resin layer on the inner side of the white resin layer. From the viewpoint of airtightness, the inner resin layer preferably contains a fusible resin. Examples of fusible resins include polyolefin resins such as polyethylene, and polyethylene terephthalate (PET). Among these, polyolefin resins are preferred from the viewpoint of fusibility, and polyethylene is more preferred.

[0031] The white resin film may have a resin outer layer containing resin on the outer side of the aluminum layer, from the viewpoint of protecting the white resin layer. Examples of resins in the resin outer layer include polyethylene terephthalate (PET) and polypropylene (PP). Among these, PET is preferred from the viewpoint of protection.

[0032] (shape) The packaging material can be, for example, in the form of a bag (i.e., three sides are fused together, with only one side open). Because it is a bag, the fittings can be inserted into the bag through the open end, and then the open end can be closed to facilitate packaging. Methods for closing the open end include, for example, using an adhesive, or by fusing the inner resin layers together.

[0033] (Size) The size of the packaging material may be large enough to pack one fitting, or large enough to pack multiple fittings (for example, 2, 5, or 10). However, it is preferable that the packaging material be large enough to pack one fitting, from the viewpoint of preventing thermal deformation of the polyvinyl chloride component of the fitting.

[0034] <Water supply fittings packaging> A water supply fitting package according to an embodiment of the present disclosure comprises a water supply fitting that includes a member containing at least a portion of polyvinyl chloride, and the aforementioned packaging material of the present disclosure for packaging the water supply fitting.

[0035] According to the water supply joint packaging body of the embodiment of this disclosure, softening of the polyvinyl chloride member in the joint is suppressed, and deformation of the polyvinyl chloride member is suppressed. [Examples]

[0036] The present disclosure will be described in more detail below with reference to examples, but the present disclosure is not limited to these examples.

[0037] [Sample of joint packaging] Samples of the fitting packages were prepared by sealing each PVC fitting (product name: Pushmaster HIVP conversion socket, manufactured by Bridgestone Corporation) in the packaging materials shown below. Samples of the joint packaging prepared in each example and comparative example were left outdoors in a sunny environment with a maximum temperature of 33.1°C (direct sunlight) for 2 hours, and the internal temperature of the packaging material was measured using a thermograph. The maximum temperature reached was as follows.

[0038] Comparison Example 1: Transparent bag (Material: Polyethylene, Light-blocking rate: 1%), Maximum temperature reached: 72.1℃ Comparison Example 2: Blue transparent bag (Material: polyethylene, light blocking rate 5%), maximum temperature reached: 74.2℃ Example 1: Aluminum laminated film (Construction: A three-layer film having a 30 μm polyethylene resin layer, a 7 μm aluminum layer, and a 12 μm PET resin layer from the inner side, with a light shielding rate of 100%), maximum temperature reached: 39.1℃

[0039] As shown above, compared to using transparent bags (Comparative Example 1) and blue transparent bags (Comparative Example 2) as packaging materials, using aluminum laminated film (Example 1) as packaging material reduced the maximum temperature reached.

[0040] Furthermore, it is presumed that the maximum temperature reached can be reduced in the same way as in Example 1 by using, for example, a white resin film with a light-shielding rate of 99% as packaging material.

[0041] Furthermore, the polyvinyl chloride fittings in the above-mentioned water supply piping contain 2-ethylhexyl phthalate as a plasticizer in the polyvinyl chloride component. In Example 1, where a packaging material with a polyethylene resin layer as an inner layer was used with these fittings, no migration of the plasticizer from the polyvinyl chloride component of the fitting to the inner layer of the packaging material was observed, nor was any discoloration or softening of the polyvinyl chloride component observed.

[0042] [Checking temperature based on differences in light-blocking rate] Next, to confirm the difference in internal temperature between packaging materials with a light-blocking rate of 75% or more and those with a light-blocking rate of less than 75%, the following simulated experiment was conducted.

[0043] Ten PVC fittings for water supply piping (product name: Pushmaster HIVP conversion socket, manufactured by Bridgestone Corporation) were placed in the packaging materials shown below and sealed to prepare sample fitting packages as reference examples. Samples of the joint packaging prepared in Reference Example 1 and Reference Comparison Example 1 were left outdoors in a sunny environment with a maximum temperature of 34.2°C (direct sunlight) for 4 hours and 25 minutes, and the internal temperature of the packaging material was measured using a thermograph. The maximum temperature reached was as follows.

[0044] • Reference Example 1: A sample of a fitting package containing 10 fittings in a transparent bag (material: polyethylene, light-blocking rate 1%), maximum temperature reached: 83.6℃ • Example 1: A sample of a fitting package consisting of 10 fittings placed inside a white Kent paper envelope (76.3% light-blocking rate), and then the Kent paper envelope was placed in a transparent bag (material: polyethylene, water-resistant). Maximum temperature reached: 56.1℃

[0045] As shown above, compared to the sample using a transparent bag as packaging material (Reference Comparative Example 1), the fitting packaging sample (Reference Example 1), which was placed in a white Kent paper envelope (light-shielding rate 76.3%) and then in a transparent bag, was able to reduce the maximum temperature reached. Furthermore, while deformation was observed in the polyvinyl chloride-containing component of the fitting in Reference Comparative Example 1 (light-shielding rate 1%), no deformation was observed in the polyvinyl chloride-containing component of the fitting in Reference Example 1 (light-shielding rate 76.3%).

Claims

1. A packaging material for packaging water supply fittings that include at least a portion of a component containing polyvinyl chloride, The light-blocking rate is 75% or more. Water-resistant, Packing materials.

2. The packaging material according to claim 1, comprising a laminated film containing an aluminum layer.

3. The laminated film has a resin inner layer containing resin, which is arranged on the inner surface side of the aluminum layer and contacts the water supply fitting. The packaging material according to claim 2, wherein the resin inner layer contains a polyolefin resin as the resin.

4. The packaging material according to claim 1, which is bag-shaped and of a size capable of packaging one of the water supply fittings.

5. A water supply fitting that includes a component containing polyvinyl chloride in at least part of it, A packaging material according to any one of claims 1 to 4 for packaging the water supply fitting, A water supply fitting package having the following features.