JP5645797B2 - Packing structure of laminate of melamine decorative board - Google Patents

Description

  The present invention relates to a packaging structure for a laminate of fibrous base resin-impregnated laminate and a packaging method for a laminate of fibrous base resin-impregnated laminate.

  Conventionally, as a fibrous base resin impregnated laminate, a metal such as copper foil has been applied to the surface of a prepreg in which a fibrous base material such as paper or glass fiber cloth is impregnated with a thermosetting resin such as epoxy resin or phenol resin. Known are metal-clad laminates laminated with foil, and melamine decorative boards obtained by laminating melamine resin-impregnated patterned paper and phenolic resin-impregnated paper and hot pressing.

  As can be seen from the raw materials used, these fibrous base resin impregnated laminates are composites of a fibrous base material and a synthetic resin, and are required to be considered so as not to be affected by humidity during storage. For example, a technique for packaging using a shrink film is disclosed. (See Patent Document 1). Further, although not related to the fibrous base material resin-impregnated laminate, a technique using a foam sheet is disclosed as a packaging technique for a water-developing plate material packaging. (See Patent Document 2) Further, in the decorative board industry, when shipping a large number of decorative boards, such as hundreds of sheets, on the outside of the uppermost decorative board and the lowermost decorative board, cardboard and defective cosmetics It is customary to arrange and pack a plate or a phenolic resin laminate.

JP-A-4-142271 WO99 / 10253 pamphlet

  However, these fibrous base resin-impregnated laminates still have a problem that they are bent or warped depending on the storage state due to the effect of moisture absorption and desorption that is considered to be caused by the fibrous portion.

  Especially when transporting several hundred to thousands of sheets by sea, the storage period is several months, and the storage conditions are low to high, low to high, and until the fiber reaches the destination from the production area to the destination. The resin-impregnated laminate may suffer from severe environmental conditions, and when it arrives at the destination and unpacks it, the fibrous substrate resin-impregnated laminate warps and not only looks bad, but also cuts It was difficult to process and bond.

By the present inventors has been examined in view of such circumstances, a packaging structure of a laminate of melamine decorative board, outside the uppermost melamine decorative plate and the lowermost melamine decorative board, a synthetic resin foam cushioning sheet, plate Are arranged in order, and the side surface is wound with a synthetic resin film, and the laminate, the synthetic resin foam cushioning sheet, and the plate material arranged above the laminate of the melamine decorative board are wrapped with a plastic film. The synthetic resin foam cushioning sheet has a packaging structure of a laminate of melamine decorative boards , wherein a flat surface is in contact with the uppermost melamine decorative board and the lowermost melamine decorative board. .

  According to the method of the present invention, the fiber base resin-impregnated laminate can be bent even if the laminate of the fiber base resin-impregnated laminate is stored for a long period of time or transported to the distance. And warpage is extremely small. Furthermore, the synthetic resin foam cushioning sheet is lightweight and easy to handle, can be reused, and the packaging cost is low.

  FIG. 1 is a schematic cross-sectional view showing a packing structure of a laminate 50 of the fibrous base resin impregnated laminate 5 of the present invention. Laminate 5 is obtained by impregnating a fibrous base material such as paper, woven fabric, and non-woven fabric with a thermosetting resin or a thermoplastic resin, laminating a dried core material, a metal foil and a decorative layer, and then hot pressing. It is. A specific example of the laminated board 5 is a melamine decorative board having a thickness of 16 mm. In the laminate 50, 30 laminate plates 5 are laminated. The synthetic resin bubble cushioning sheet 3 is placed immediately above the uppermost melamine decorative board and directly below the lowermost melamine decorative board so that the flat surface 4 is in contact with the melamine decorative board.

The synthetic resin bubble buffer sheet 3 is not particularly limited as long as it has a buffering property. For example, the synthetic resin bubble buffer sheet 3 is made of polyethylene, polypropylene, polyurethane, polystyrene, phenol resin, and the like. And a synthetic resin closed cell cushion sheet made of a polyolefin resin such as polypropylene and having a large number of independent air chambers.
The synthetic resin closed cell cushion sheet expresses a buffer function by converting the external force into the tensile stress of the sheet by changing the volume of the gas, and it is synthesized against shrinkage due to temperature and humidity of the fiber base resin impregnated laminate 5. It is particularly preferable because it is easier to follow than the resin open-cell buffer sheet. Commercially known products such as bubble wrap (registered trademark, trademark owner Kawakami Sangyo Co., Ltd.), air cap (registered trademark, trademark owner Ube Industries, Ltd.), Minapak (registered trademark, Sakai Chemical Industry Co., Ltd.), etc. It is used as a packing material for storage and transportation of ceramics, electronic precision equipment, etc. The shape of the part constituting the bubble is not particularly limited, such as a cylindrical shape or a regular hexagonal column.

  The plate 1 disposed outside the synthetic resin foam cushioning sheet 3 is used for preventing damage to the uppermost fiber base resin impregnated laminate 5 and the lowermost fiber base resin impregnated laminate 5, The synthetic resin bubble buffer sheet 3 is pressed to play a role of being in close contact with the uppermost fiber base resin impregnated laminate 5 and the lowermost fiber base resin impregnated laminate 5. A plastic plate, a wooden board, etc. are suitable for the board | plate material 1, and in order to reduce packing cost in this invention, the melamine decorative board with a thickness of 1.2 mm without a commercial value, ie, inferior goods, is used.

  FIG. 2 is a schematic cross-sectional view showing a structure in which the synthetic resin film 7 is wound three times around the side surface of the laminate 50 of the fibrous base resin impregnated laminate 5. Examples of the synthetic resin film 7 include a polyethylene film, a polypropylene film, a polyethylene terephthalate film, and a stretch film. Among these, stretch films are used to wrap foods such as fruits and vegetables, fresh fish, fresh meat, and side dishes, and many commercial products are easily available. Moreover, it is inexpensive. The stretch film is a film formed from a stretchable material, and has excellent extensibility, flexibility, and adhesiveness. The stretch film adheres firmly to the laminate 50 of the fiber base resin impregnated laminate 5, and the fiber base resin. Moisture in and out of the mouth of the impregnated laminated plate 5 can be prevented by a stretch film, and is not recommended to bend or warp.

  The stretch film is made of polyvinyl chloride resin, polyvinylidene chloride resin, low density polyethylene resin, ethylene-butene-1 copolymer resin, ethylene-vinyl acetate copolymer resin, ethylene-propylene copolymer resin, etc. There are no particular restrictions such as ethylene resin.

  FIG. 3 is a schematic cross-sectional view when the laminate 50 of the fibrous base resin impregnated laminate 5 is shipped. The synthetic resin bubble cushioning sheet 3 disposed on the lower side of the laminate 50, the laminate 50, and FIG. The plate 1 disposed above the laminate 50 is packaged with a plastic film 10 and placed on a pallet 15.

  FIG. 5 is a schematic cross-sectional view when the surface of the fibrous base material resin-impregnated laminate 5 is covered with the protective material 6 in order to suppress the generation of scratches. As the protective material 6, for example, a protective film with an adhesive in which an acrylic or rubber adhesive is applied to one surface of a non-hygroscopic synthetic resin film such as a polyethylene film, a polypropylene film, a polyethylene terephthalate film, or a vinyl chloride film, A metal foil such as aluminum foil, paper, or a composite sheet of alumni foil and paper can be applied. The protective material is appropriately selected and used depending on the handleability due to the thickness and weight of the fibrous base resin-impregnated laminate 5.

  FIG. 6 is a plan view of the synthetic resin foam cushioning sheet 3, and FIG. 7 is a cross-sectional view simply showing the bubbles of the two-layer type synthetic resin foam cushioning sheet 3 used in the examples of the present invention. .

  Although it is expensive in terms of cost, a three-layer type synthetic resin bubble cushioning sheet 3 ′ can also be used as shown in the cross-sectional view schematically showing the bubbles in FIG. 8.

  In order from the bottom, a non-commercial melamine decorative board having a thickness of 1.2 mm, a width of 1235 mm, and a length of 2455 mm is placed on the pallet as the plate material 1, and then a polyethylene film having a thickness of 90 μm as a plastic film 10 for packaging thereon. Was cut and spread as much as needed for packaging. After that, a synthetic resin closed cell cushion sheet (Puchipuchi, registered trademark, trademark holder Kawakami Sangyo Co., Ltd., material: polyethylene, two-layer type) is placed every other piece with the flat side up, 30 sheets of a melamine decorative board having a thickness of 16 mm, a width of 1235 mm, and a length of 2455 mm as a product were stacked on top of each other, and the side surfaces of the 30 sheets of the melamine decorative board were wound three times with a polyethylene-based stretch film having a thickness of 10 μm. Next, one piece of bubble wrap (registered trademark, trademark holder Kawakami Sangyo Co., Ltd., material: polyethylene, two-layer type) as a synthetic resin closed cell cushioning sheet is placed with a flat surface facing down, and a thickness of 1. Two non-commercial melamine decorative boards of 2 mm, width 1235 mm, and length 2455 mm were laminated, wrapped with polyethylene film (FIG. 3), and tightened with a pallet so as not to collapse the load with PP (polypropylene) band 20 (FIG. 4). ). After that, it was transported by sea from Indonesia to Japan over about 30 days, and when unpacked, there was no bending and the warping of the four corners was 0-2 mm.

  In Example 1, as shown in FIG. 5, the front and back of the melamine decorative board were covered with a polyethylene film with an adhesive having a thickness of 60 μm and an acrylic adhesive applied to a thickness of 10 μm as the protective material 6. It carried out similarly.

Comparative Example 1
As shown in FIG. 9, a synthetic resin closed cell sheet (Puchipuchi, registered trademark) and a stretch film were not used in Example 1, but instead of a non-commercial melamine decorative board having a thickness of 1.2 mm, a width of 1235 mm, and a length of 2455 mm. The same procedure was performed except that a phenol resin laminate having a thickness of 6 mm, a width of 1235 mm, and a length of 2455 mm was used. After that, it was transported by sea in the same manner as in Example 1, and even those that were not likely to become complaints were bent around 2 out of 30 melamine decorative boards, and the warpage was 3-5 mm, which was larger than in Example 1.

Comparative Example 2
In Comparative Example 1, the same procedure was performed except that a phenol resin laminate having a thickness of 3 mm, a width of 1235 mm, and a length of 2455 mm was used instead of the phenol resin laminate having a thickness of 6 mm, a width of 1235 mm, and a length of 2455 mm. The warpage was as large as 9 to 11 mm with the same degree of bending as in Comparative Example 1.

Comparative Example 3
In Comparative Example 1, in place of a phenolic resin laminate having a thickness of 6 mm, a width of 1235 mm, and a length of 2455 mm, the same procedure was performed except that a non-commercial melamine decorative plate having a thickness of 1.2 mm, a width of 1235 mm, and a length of 2455 mm was used. However, the result was the same degree of bending as in Comparative Example 1, and the warpage was as large as 9 to 11 mm.

Ｐｈｅ板：フェノール樹脂積層板
Ｍｅ板：メラミン化粧板

Phe board: phenolic resin laminate board Me board: melamine decorative board

Deflection: The periphery of 30 decorative plates was visually confirmed.
Warpage: The degree of warping at the four corners was measured.

The schematic cross section which shows the packing structure of this invention. The schematic cross section which shows the structure which wound the synthetic resin film. The schematic cross section which shows the packing form of the structure of this invention. The schematic cross section which shows the shipment form of the structure of this invention. The schematic cross section which shows the shipment form of the other Example of this invention. The top view of the synthetic resin bubble buffer sheet 3. FIG. Sectional drawing of the bubble of the synthetic resin bubble buffer sheet 3. FIG. Sectional drawing of the bubble of 3 layer type synthetic resin bubble buffer sheet | seat 3 '. The schematic cross section which shows the packing structure of the comparative example 1. FIG.

DESCRIPTION OF SYMBOLS 1 Board | plate material 3 Synthetic resin bubble buffer sheet 3 'Synthetic resin bubble buffer sheet 4 Flat surface 5 Fibrous base-material resin impregnation laminated board 50 Laminate 6 Protective material 7 Synthetic resin film 9 Phenolic resin laminated board 10 Plastic film 15 Pallet 20 PP ( Polypropylene) band

Claims (3)

It is a packing structure of laminates of melamine decorative boards , and a synthetic resin foam cushioning sheet and a plate material are sequentially arranged outside the uppermost melamine decorative board and the lowermost melamine decorative board, and the side is wound with a synthetic resin film. The laminate, the synthetic resin foam cushioning sheet, and the plate material disposed above the laminate of the melamine decorative board are packaged with a plastic film, and the synthetic resin foam cushioning sheet has a flat surface. A packaging structure of a laminate of a melamine decorative board , which is in contact with the uppermost melamine decorative board and the lowermost melamine decorative board . The packaging structure for a laminate of melamine decorative boards according to claim 1, wherein the synthetic resin foam cushioning sheet is a synthetic resin closed foam cushioning sheet. 2. The laminate structure for a laminate of melamine decorative boards according to claim 1, wherein the board material is a melamine decorative board having no commercial value.

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