JP2005247402A - Self-adhesive packaging member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a self-adhesive packaging member used for a stick-shaped, pillar-shaped or linear product which can inexpensively and easily cure, prevent stain, corrosion and moisture, and whose adhesive agent does not stay on a product in opening the same. <P>SOLUTION: This relates to a packaging member having a self-adhesive agent layer on both faces of its strip base material. One face of the base material is provided with the self adhesive agent layer partially in width direction and extending in the longitudinal direction of the base material and with a non-adhesive part covering the area of the base material excluding where the self-adhesive layer is mounted and extending in the longitudinal direction. The other face of the base material is provided with the self-adhesive agent layer partially in width direction and extending in the longitudinal direction of the base material and with a non-adhesive part covering the area of the base material excluding where the self-adhesive layer is mounted and extending in the longitudinal direction. The non-adhesive part on one face and the self-adhesive layer on the other face extend facing each other. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a packaging member mainly used for curing rod-shaped, columnar and linear products, preventing dirt, preventing corrosion, and waterproofing, and more particularly to a self-adhesive packaging member in which an adhesive does not adhere to a product after peeling. It is.

When products are shipped, for the purpose of preventing dirt, preventing corrosion, preventing water wetting, etc., it is widely performed that products are packaged and distributed.
As such packaging, there is a very simple method that has been performed for a long time, such as packing the product with wrapping paper or storing it in cardboard, but it can be easily applied to rectangular products, There has been a problem that it is difficult to apply to products having special shapes such as columnar shapes, rod shapes, and linear shapes.

  Further, a method of winding a packaging tape having an adhesive layer that easily peels is known. In this method, even a product having a special shape can be packaged, but there are problems such as adhesion of the product to the product at the time of opening and damage to the product due to peeling of the tape.

  In order to solve such a problem, a method has been proposed in which wrapping is performed with a resin film, and the film is heated to be fused or shrunk and packaged. For example, a method is disclosed in which a product is covered with a heat-shrinkable polyester film, and heated to shrink the film so that the product is in close contact with the product for packaging (for example, see Patent Document 1).

Although this method can prevent dirt, corrosion, and water wetting and prevent adhesion of the adhesive, it requires a heating step and cannot be applied to a product having no heat resistance. In addition, there is a problem in terms of labor and cost, such as requiring a heating step after the coating step.
Furthermore, a method and an apparatus for winding a packaging tape around a cylindrical object are disclosed (for example, see Patent Document 2).

JP 2000-254968 (Example, abstract) JP 07-267216 (Examples, abstract)

  However, even in this method and apparatus, since the conventional resin film or packaging tape is used as the packaging member, the above-described problems have not been solved.

  The present invention has been made in view of the above-described circumstances, and curing, contamination prevention, corrosion prevention, and waterproofing can be performed on a product having a special shape such as a rod shape, a column shape, or a linear shape by a low-cost and easy method. It is another object of the present invention to provide a self-adhesive packaging member in which the adhesive can be prevented from adhering to the product when opened.

  The self-adhesive packaging member of the present invention is a packaging member having a self-adhesive adhesive layer on both sides of a belt-like base material, and one side of the base material occupies a part in the width direction of the base material. And a self-adhesive adhesive layer extending in the longitudinal direction, and a non-adhesive portion that occupies a part other than the self-adhesive adhesive layer of the base material and extends in the longitudinal direction. The surface occupies a part of the width direction of the base material and extends in the longitudinal direction, and occupies a portion other than the self-adhesive adhesive layer of the base material and extends in the longitudinal direction. A non-adhesive portion is provided, and the non-adhesive portion on one surface and the self-adhesive adhesive layer on the other surface extend opposite to each other.

  According to such a self-adhesive packaging member, as shown in FIG. 3, in the wound state, adjacent substrates can face each other's self-adhesive adhesive layer and the non-adhesive portion. . Moreover, at the time of use, as shown in FIG. 5, adjacent base materials can oppose each other's self-adhesive adhesive layer.

  Therefore, since the self-adhesive packaging members are easily peeled off without being adhered to each other in the wound state, they can be used smoothly. Also, during packaging, the self-adhesive adhesive layers adhere to each other, and only the non-adhesive part is exposed to the package and the outer surface. It does not adhere to hands.

  The self-adhesive packaging member of the present invention includes a base material and a self-adhesive adhesive as essential components. The self-adhesive property refers to a property that adheres when the adhesive layers are brought into contact with each other and pressurizes, but does not adhere even when contacted or pressurized with another substance.

  As the base material used in the self-adhesive packaging member of the present invention, paper formed from wood pulp, synthetic paper, plastic film, and the like can be used. As paper using wood pulp as a main raw material, LBKP alone or a mixture of NBKP and LBKP can be used. When NBKP and LBKP are mixed and used, a ratio in which the blending ratio of NBKP is 50% or less is preferable in consideration of paper quality. Furthermore, waste paper can be blended as long as the strength of the base paper can be maintained.

  Further, a paper strength enhancer can be internally added for the purpose of improving the strength of the wood pulp paper used as the base paper. As paper strength enhancers, polyacrylamide resins, polyamide epichlorohydrin resins, modified starches such as cationized starch and acetylated starch, melamine resins, urea resins, CMC, guar gum, modified guar gum, polyamide resins, polyamine resins, epoxy modified Examples thereof include polyamide.

  In addition, various synthetic resins are used as the main raw material, and inorganic fillers and other additives are added, melt-kneaded, extruded into a sheet, formed into a film by a biaxial stretching method, and converted into paper. Conventional synthetic paper imparted with the above properties can be used as the base material of the present invention. Examples of the main synthetic resin include polypropylene, polystyrene, polyester, and vinyl chloride. Synthetic paper is superior in properties such as strength, water resistance, dimensional stability, weather resistance, and dust resistance compared to natural paper, so by using synthetic paper in the self-adhesive packaging member of the present invention, Various properties can be imparted.

  In addition to the biaxial stretching method, the synthetic paper can be produced by laminating split fibers to form paper, by making paper from a micro-foamed film, by cutting various synthetic fibers into short lengths and by conventional wet methods. A method of obtaining synthetic fiber paper by a papermaking method, a method of obtaining a semi-synthetic fiber paper by mixing synthetic fibers and cellulose fibers, and a method of forming paper by a dry nonwoven fabric manufacturing method without using a conventional wet method Can be mentioned.

  As plastic films, polyester films such as polyethylene terephthalate (PET) and polyethylene-2,6-naphthalate, polyolefin films such as polyethylene (PE) and polypropylene (PP), polyamide films such as nylon (NY), polycarbonate films, polystyrene A film, a fluororesin film, a polyvinylidene chloride (PVDC) film, or the like can be used.

  The film is preferably a heat-bonded film, particularly preferably a biaxially stretched film. Moreover, in order to give adhesiveness to the film, a film that has been previously subjected to corona treatment, plasma treatment, or flame treatment can also be used. Further, a film in which an organic adhesive such as a surfactant system or a polymer electrolyte system is coated in advance on the film can also be used.

  The film may be colorless and transparent depending on the application, or it may be an opaque film that uses various fillers, generates microvoids in the manufacturing process, or has undergone physical treatment such as embossing. There may be.

  Other than the above-mentioned films, water-soluble polymer films such as polyvinyl alcohol (PVA) films and starch films, and biodegradable films such as polylactic acid films and modified polyester resin films are used in other limited applications. You can also.

  Further, as the self-adhesive adhesive of the present invention, any adhesive may be used as long as it has a self-adhesive property that does not lose its adhesiveness after drying, and can be adhered by pressurization. A configuration in which a non-adhesive component such as a natural rubber-based adhesive component and a filler is added to the medium is preferable.

  Examples of such natural rubber-based components include raw natural rubber latex, vulcanized natural rubber latex, and natural rubber latex obtained by graft copolymerization with methyl methacrylate (MMA). Examples of the vulcanizing agent for the vulcanized natural rubber latex include sulfur, a sulfur-containing compound, an organic peroxide, a metal oxide, an organic polyvalent amine, and a modified phenolic resin.

Hereinafter, the self-adhesive packaging member of the present invention will be described in more detail with reference to the drawings.
FIG. 1 is a schematic view showing a winding state before use of the self-adhesive packaging member 10 of the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 is a cross-sectional view taken along line BB. is there. As shown in FIGS. 1 and 2, one surface (the upper surface in FIGS. 1 and 2) of the belt-shaped base material 1 occupies a part in the width direction of the base material 1 and the longitudinal direction of the base material 1. A self-adhesive adhesive layer 2 is provided, and a non-adhesive portion 3 occupying a portion other than the self-adhesive adhesive layer 2 and extending in the longitudinal direction of the substrate 1 is provided. In addition, the other surface (the lower surface) of the base material 1 occupies a part in the width direction of the base material 1 as well as the upper surface and extends in the longitudinal direction of the base material 1. And a non-adhesive portion 3 that occupies a portion other than the self-adhesive adhesive layer 2 and extends in the longitudinal direction of the substrate 1. Further, the non-adhesive portion 3 on the lower surface faces the self-adhesive adhesive layer 2 on the upper surface, and the non-adhesive portion 3 on the upper surface faces the self-adhesive adhesive layer 2 on the lower surface. .

  FIG. 3 shows a schematic diagram of a cross section in a state where the self-adhesive packaging member of the present invention is wound up in a roll shape. If arbitrary packaging members adjacent to each other are A and B, the non-adhesive portion 3 of the member A and the self-adhesive adhesive layer 2 of the member B are opposed to each other, so there is no possibility that they are bonded. Therefore, a release paper for protecting the adhesive layer, such as a packaging tape using a conventional adhesive, is unnecessary.

  FIG. 4 is a schematic view using the self-adhesive packaging member of the present invention for a cylindrical object, and FIG. 5 is a cross-sectional view taken along line AA in FIG. As shown in these drawings, in order to wind the self-adhesive packaging member 10 of the cylindrical object 4, first, the self-adhesive packaging member 10 is wound around the cylindrical object 4 once. Next, in the second round, the self-adhesive adhesive layer inside the self-adhesive packaging member 10 in the second round on the self-adhesive adhesive layer 2 outside the self-adhesive packaging member 10 in the first round. The second and subsequent turns are wound in a similar manner, and the base material 1 is shifted every turn and bonded so that the self-adhesive adhesive layers 2 overlap each other. In this way, as shown in FIG. 5, the self-adhesive adhesive layers 2 are bonded to each other, only the non-adhesive portion 3 is brought into contact with the packaged article, and only the non-contact portion 3 is exposed to the outside. The packaging can be applied in a wet state.

  In addition, as the cylindrical object 4 using the self-adhesive packaging member of the present invention, specifically, a precious wood as a building material, a metal mechanical part such as a metal / plastic pipe, an automobile rod, or a fiber cable And the like.

  In the present invention, the adhesive layer is not formed continuously, but can be formed in stripes or dots as shown in FIG. 6, for example. By doing so, not only the cost of the adhesive can be reduced, but also the adhesive force can be arbitrarily adjusted.

  Moreover, as shown in FIG. 7, the width | variety of the self-adhesive adhesive layer 2 formed on the base material 1 can also be changed. By doing in this way, the width | variety of the overlapping part at the time of winding of a packaging member can be changed.

[Example 1]
Usually, unbleached kraft paper (trade name: Tokai Craft B, manufactured by Tokai Pulp Co., Ltd.) was used as a packaging member base material. As the adhesive, a mixture of 100 parts by weight of natural rubber latex, 5 parts by weight of terpene resin, and 20 parts by weight of styrene-butadiene copolymer latex was used. The terpene resin is a pressure-sensitive adhesive-based adhesion aid, has good compatibility with a rubber-based material, and has an effect of increasing initial adhesive strength, adhesive strength, and cohesive strength.

The coating method was based on the die coating method shown in FIG. As shown in FIGS. 8 and 9, a 30 mm-wide shim was prepared in the coating liquid injection unit 6 using a Teflon (registered trademark) plate having the same thickness as the injection opening width, and attached at intervals of 20 mm. In the first step, the adhesive is applied and dried on one surface of the substrate by the above coating method so that the application amount is 15 g / m ^2, and self-adhesive adhesion with a width of 20 mm extending in the longitudinal direction of the product. An agent part and a non-adhesive part with a width of 30 mm were provided. Subsequently, in the second step, the application amount of the adhesive is 15 g / m so that the portion facing the first step adhesive part becomes a non-adhesive part on the opposite surface of the base material coated with the adhesive in the first step. ² was applied and dried to provide a self-adhesive adhesive portion having a width of 20 mm and a non-adhesive portion having a width of 30 mm extending in the product longitudinal direction. With respect to this coated body, slits were formed at intervals of 50 mm so that non-adhesive portions of 2.5 mm were formed on the front and back of both ends, and the self-adhesive packaging member of Example 1 was produced.

[Example 2]
A self-adhesive packaging member of Example 2 was produced in the same manner as in Example 1 except that a water-resistant base paper (manufactured by Yodogawa Paper Mill) was used as the packaging member base material imparted with water resistance.

[Example 3]
A biodegradable film (trade name: Pal Green LC, manufactured by Tosero) was used as a packaging member base material imparted with biodegradability. As the adhesive, a mixture of 100 parts by weight of natural rubber latex, 10 parts by weight of terpene resin (adhesion aid) and 15 parts by weight of styrene-butadiene copolymer latex was used.

The coating method was based on the die coating method shown in FIG. As shown in FIGS. 8 and 9, a 30 mm-wide shim was prepared in the coating liquid injection unit 6 using a Teflon (registered trademark) plate having the same thickness as the injection opening width, and attached at intervals of 20 mm. The first step was performed in the same manner as in Example 1. Subsequently, in the second step, a stepped (uneven) roll that matches the pitch of the adhesive layer formed in the first step is used as a backing roll, the surface opposite to the first step of the substrate is planarized, and further the first step The adhesive is applied and dried so that the portion facing the adhesive portion becomes a non-adhesive portion, and the coating amount is 15 g / m ^2. A non-adhesive part of 30 mm is provided. A schematic diagram of this second step is shown in FIG. With respect to this coated body, slits were formed at intervals of 50 mm so that non-adhesive portions of 2.5 mm were formed on the front and back of both ends, and a self-adhesive packaging member of Example 3 was produced.

[Example 4]
The self-adhesive packaging member of Example 4 was obtained in the same manner as in Example 3 except that a vaporizable rust-proof film (trade name: Bolocene 205, manufactured by Aicero Chemical) was used as a packaging member substrate imparted with rust prevention. Produced.

  As described above, according to the present invention, it is possible to obtain effects such as curing, dirt prevention, corrosion prevention, and waterproofing for products having shapes such as rods, columns, and lines by a low cost and easy method. It is possible to provide a self-adhesive packaging member in which the adhesive does not adhere to the product when opened.

It is a schematic diagram which shows the winding-up state of the self-adhesive packaging member of this invention. It is the sectional view on the AA line in FIG. It is the BB sectional view taken on the line in FIG. It is the example which applied the self-adhesive packaging member of this invention to the cylindrical object. It is the sectional view on the AA line in FIG. It is other embodiment of the self-adhesive packaging member of this invention. It is other embodiment of the self-adhesive packaging member of this invention. It is the schematic of the die-coating system which is an example of a coating system. It is an enlarged view of the coating liquid injection | emission part which attached the shim. It is an enlarged view of a backing roll and a product.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Self-adhesive packaging member 1 Base material 2 Self-adhesive adhesive layer 21 1st process adhesive 22 2nd process adhesive 3 Non-adhesion part 4 Cylindrical object 51 Backing roll 52 Backing roll (stepped)
6 Coating liquid injection part 61 Coating liquid injection port 62 Teflon (registered trademark) shims A and B Self-adhesive packaging member

Claims (3)

A packaging member having a self-adhesive adhesive layer on both sides of a belt-shaped substrate,
On one surface of the substrate, a self-adhesive adhesive layer that occupies a part of the width direction of the substrate and extends in the longitudinal direction, and other than the self-adhesive adhesive layer of the substrate A non-adhesive part occupying part and extending in the longitudinal direction;
The other surface of the base material occupies a part of the width direction of the base material and extends in the longitudinal direction, and other than the self-adhesive adhesive layer of the base material. A non-adhesive part occupying a part and extending in the longitudinal direction;
The self-adhesive packaging member, wherein the non-adhesive portion on the one surface and the self-adhesive adhesive layer on the other surface extend opposite to each other.   The self-adhesive packaging member according to claim 1, wherein the self-adhesive adhesive layer is applied in a number of dots.   The self-adhesive packaging member according to claim 1, wherein the self-adhesive adhesive layer is applied in a certain geometric pattern.

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