JP5207478B2 - Container using synthetic resin sheet and non-woven fabric laminated sheet and container molding method - Google Patents

Description

The present invention relates to a laminated sheet of a synthetic resin sheet and a nonwoven fabric, which is a material of a container for storing soft fruits such as strawberries, ripe tomatoes, peaches, fish such as fish and their fillets, or fragile articles such as eggs and bottles, etc. Relates to a container and a method for forming the container.

  Conventionally, containers for storing fragile items such as soft fruits, fish or eggs and bottles are directly stored in a container made of cardboard or a relatively soft synthetic resin, or a separate buffer member. We are using. The soft container is used as a buffer container due to the flexibility of the material itself, but there is a limit to this, and the article is often damaged when a larger impact than expected is applied. In addition, in the case of using a separate buffer member, it takes time to dispose the buffer member between articles, and at the same time, it is necessary to take measures against waste after use.

  In addition, there are containers in which elastic members are integrated inside the thin outer member, but these containers are processed by integrating the outer and inner materials, or the outer member is processed to obtain a predetermined one. After completing the storage part having a shape, a resilient member is firmly attached to the entire surface inside the storage part. As in the case described above, the container completed by them was easy to receive an impact on the stored article, and in the latter case, at least of the step of forming the outer shape that is the outer side and the step of sticking the buffer member to the outer member. Two different steps were required.

  In addition, as described in the following literature, a non-woven fabric is laminated on the inside of a plastic sheet so that the non-woven fabric is positioned in the inside recess, and a recess is formed in a part of the plastic sheet on the bottom side. There is a container in which the nonwoven fabric layer is separated and a void is present, and a method for manufacturing the same. However, in this document, the plastic sheet layer and the nonwoven fabric layer are integrated with the bottom and the entire side except for a part on the bottom. It is a container to be molded.

  The above-mentioned container manufacturing method is such that a laminated material composed of a nonwoven fabric layer constituting the inner layer of the container body and a plastic sheet layer constituting the outer layer is preheated, and then sandwiched between upper and lower molds and pressed against the lower mold with a plug. The tray body is manufactured by vacuum pressure molding by sucking and exhausting through the lower mold. And after embossing with the plug, when vacuum forming through the lower mold provided with irregularities, the nonwoven fabric layer is not sucked because it is breathable, so a part of the part that becomes the bottom of the container provided in the lower mold The plastic sheet layer constituting the outer layer of the container body only peels off from the nonwoven fabric layer and adheres to the concave part of the lower mold without being in close contact with the concave part of the container. A gap corresponding to the recess is formed.

  As described above, a gap is formed in a part of the bottom portion between the plastic sheet and the nonwoven fabric, but the other inner bottom and side portions are firmly bonded to the plastic sheet and the nonwoven fabric. It is closely attached.

JP 2001-151219 A

  As described above, there are plastic containers in which a nonwoven fabric is laminated on the inside. However, in these cases, the outer layer of plastic and the nonwoven fabric on the inside are firmly integrated over the entire surface, or many other than that except for a part thereof. Since these parts are firmly integrated, all or most of the stored articles come into contact with the bottom or side where the nonwoven fabric and plastic are integrated. Accordingly, the stored article is directly subjected to an impact from the plastic layer as the outer layer, and damage is often caused thereby. The present invention solves the above-mentioned drawbacks, and since the stored article comes into contact only with the non-woven fabric that is not in contact with the bottom and sides of the inner concave portion of the hard or semi-rigid synthetic resin sheet as the outer layer, It is possible to prevent an impact from damaging the stored article.

The present invention provides a laminated sheet having a nonwoven fabric was bonded laminated to thin synthetic resin sheet 0.1Mm～2.0Mm, 1 piece of the nonwoven fabric portion comprising a peripheral portion of the container to be processed as a container the synthetic resin The non-woven fabric at the inner portion that becomes the upper end frame portion around the concave portion and the concave portion that becomes a storage portion for firmly adhering to the sheet and stores the article is 1/5 to 1 / of the adhesive strength of the peripheral portion The synthetic resin sheet is stuck and laminated in a weak state of 50, and the synthetic resin sheet is formed with a recess by suction, and the nonwoven fabric is not sucked together with the synthetic resin sheet, and the bottom and side surfaces that are inside the recess The container is separated and disposed in the recess in a non-adhered state with a gap between the upper end frame and the inner periphery of the recess , and is held weakly adhered to the synthetic resin sheet. The peripheral part of the resin is strong with the synthetic resin sheet It is characterized by a container made of a laminated sheet of a synthetic resin sheet and a non-woven fabric, which is held in a state where it is stuck on.

The thin synthetic resin sheet is characterized by a container made of a laminated sheet of a synthetic resin sheet selected from any one of PET, PVC, PS, PP, and PE and a nonwoven fabric.

Furthermore, it is characterized by a method for forming a container using a laminated sheet of a synthetic resin sheet and a nonwoven fabric comprising the following steps.
1. The lower mold of the vacuum forming machine forms a concave mold for molding a concave part that becomes a storage part in the synthetic resin sheet by suction, and the upper mold is located at the center position of the concave mold from the opening width of the concave mold. Forming a plug as a projection having a small width;
2. The plug is adjusted so that its push-in dimension is shallower than the depth of the concave portion of the lower mold so that the synthetic resin sheet does not contact the inner bottom surface and side surface of the concave portion serving as a storage portion molded by the lower mold. Process,
3. A thin synthetic resin sheet having a thickness of 0.1 mm to 2.0 mm is firmly attached to a peripheral portion corresponding to a size processed as a single container, and the inner side excluding the peripheral portion is attached. comprising portions are adhered by a weak state of 1/5 to 1/50 of the adhesive force of the peripheral portion to form a laminated sheet, the vacuum forming machine the synthetic resin sheet of the laminated sheet to the nonwoven fabric in the top to bottom A step of placing the upper and lower molds in a heated state ,
4). Pressing the laminated sheet by moving the upper and lower mold of the vacuum forming machine, and is sucked only the synthetic resin sheet to the lower side and separated from the nonwoven fabric by suction operation, along a concave mold of the lower die molded as recess comprising a holding section, remaining the nonwoven fabric without being sucked in the width direction and depth as the gap is formed between the inner bottom surface and inner side surfaces formed into concave portions of the synthetic resin sheet is pressed by plug direction is regulated, and the inside of the nonwoven fabric of the upper frame edge part of the peripheral recess holds the weakly adhered state with synthetic resin sheet, the peripheral portion of one container is the synthetic A process that holds the resin sheet firmly attached .

The present invention is by the molding process of the container and container by laminated sheet of synthetic resin sheet and the nonwoven fabric, the nonwoven fabric of the concave inner surface for accommodating the stored articles has a gap from the synthetic resin sheet forming the shape of the recess By setting the non-sticking state, it is possible to provide a storing means that holds the soft article to be stored with a flexible nonwoven fabric and does not damage them.

  In addition, a predetermined gap can be formed between the nonwoven fabric and the synthetic resin sheet that forms the inner bottom surface and the inner side surface of the recess serving as the article storage portion, so that the blood generated by the fillet of fish or the like Can be transferred to the gap through the blood, blood can be separated from the fillet and retained, and their freshness and appearance can be improved.

  In addition, since the entire lower surface of the stored article is also held by the non-woven fabric that floats, the entire outer periphery of the stored article is held under the same environmental conditions. It became possible to store without.

The perspective view of the lamination sheet which laminated | stacked the synthetic resin sheet and nonwoven fabric of this invention. The schematic sectional drawing which shows the relationship between the upper and lower metal mold | die of a vacuum forming machine, and a lamination sheet. The top view of one Example of the state which shape | molded the lamination sheet of the synthetic resin sheet and the nonwoven fabric in the container with the vacuum forming machine. Sectional drawing of one Example of the state which shape | molded the laminated sheet of the synthetic resin sheet and the nonwoven fabric in the container with the vacuum forming machine.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows a perspective view of a laminated sheet obtained by laminating the synthetic resin sheet of the present invention and a nonwoven fabric. The laminated sheet 1 is a sheet in which a synthetic resin sheet 2 and a nonwoven fabric 3 are laminated, and synthetic resin materials are PET (polyethylene terephthalate), PVC (polyvinyl chloride), PS (polystyrene), PP (polypropylene), PE ( Polyethylene) is a thin material with a material thickness of 0.1 mm to 2.0 mm, and particularly polyethylene terephthalate (hereinafter collectively referred to as PET sheet 2) is optimal. The nonwoven fabric 3 is most preferably a laminate of polyester nonwoven fabrics. The PET sheet 2 is a thermoplastic synthetic resin material that is excellent in transparency and strength, is thin and has durability. The nonwoven fabric 3 is not limited to the above material as long as it is a flexible material having an appropriate size and processed as a container. The peripheral portion 4 is adhered to the PET sheet 2 by a strong adhesive means, and the nonwoven fabric is adhered to the inner side of the PET sheet 2 in a non-adhered or extremely weak state so as to be laminated and integrated.

  The adhesion length and width and the adhesion force at the peripheral portion 4 are peeled off even when a tensile force acts on the nonwoven fabric 3 by pressing the nonwoven fabric 3 with a size or plug formed by the vacuum forming machine 5. Appropriately selected so as to obtain a low strength.

  On the other hand, the portion located on the inner side is not attached or attached in an extremely weak state compared to the adhesive force of the peripheral portion 4, for example, about 1/5 to 1/50 of the adhesive force of the peripheral portion 4 It is said. This is because the nonwoven fabric 3 and the PET sheet 2 that are not sucked on the concave portion when sucked by a normal suction force that forms a concave portion for using the PET sheet 2 as a storage portion by the vacuum forming machine 5 described below. The adhesive strength is such that it can be easily separated.

  The non-sticking of the inner nonwoven fabric 3 is most suitable for a container in which a molded container is a relatively large container and its peripheral part 4 is a frame or a collar part.

  FIG. 2 is a schematic cross-sectional view showing the relationship between the lower mold 6, the upper mold 7 and the laminated sheet of the vacuum forming machine 5 for processing and molding a laminated sheet of the PET sheet 2 and the nonwoven fabric 3 of the present invention. When the heated laminated sheet 1 is sucked from the lower side, there is no sticking force of the inner nonwoven fabric 3 excluding the peripheral portion 4 or it is weaker than the sucking force, so that only the PET sheet 2 is formed with a recess. Thus, the size is formed in the article storage recesses 8 having a size along the shape of 6 and an appropriate number of articles. At the same time, the non-woven fabric 3 which is not sucked on the PET sheet 2 by the plug 9 which is a protrusion smaller than the opening of the recess protruding from the position corresponding to the center position of the article storing recess 8 from the upper mold 7 It will be pushed into the storage recess 8.

  Since the protruding dimension of the plug 9 is shorter than the inner depth of the article housing recess 8 of the PET sheet 2 to be sucked as shown in FIGS. 2 and 4, the nonwoven fabric 3 is pressed by the plug 9. The nonwoven fabric 3 does not contact the inner bottom portion 10 and the inner side portion 11 of the article housing recess 8.

  By the above molding, an appropriate number of article storage recesses 8 are formed on the PET sheet 2 by the recesses of the lower mold 6 as shown in the plan view of FIG. On the other hand, since the non-woven fabric 3 disposed on the PET sheet 2 is not sucked by the vacuum forming machine 5, it is pushed into the inside of the article housing recess 8 by the dimension pressed by the plug 9. As shown in the cross-sectional view of FIG. 3, the product floats in the inner space of the article storage recess 8 without contacting the inner bottom portion 10 and the inner side portion 11 of the recess 8.

  Therefore, even if an article is stored between the inner bottom portion 10 and the inner side portion 11 and the bottom portion 12 and the side portion 13 pushed into the article storage recess 8 of the nonwoven fabric 3, the gap S that does not come into contact with the PET sheet 2. Will be formed. Thereby, various items such as soft foods such as soft fruits such as strawberries, tomatoes, peaches, fish fillets, etc., or fragile products such as eggs, bottles or precision instruments and parts thereof are stored on the nonwoven fabric 3, Even if the flexible nonwoven fabric 3 is pushed downward or laterally by these articles, the article is stored in a state of being supported by the nonwoven fabric 3 without contacting the inner bottom portion 10 or the inner side portion 11.

FIG. 3 shows a plan view of one embodiment of a vacuum-formed laminated sheet. As shown in the figure, 16 article storage recesses 8 and 8 ′ are formed in the PET sheet 2 by the recesses of the lower mold 6. The PET in the sheet 2, only the peripheral portion 4 of the nonwoven fabric 3 is firmly attached, the frame portion 14 of the inner is a state of sticking was maintained at very weak state, the article storage recess 8 Inside, the nonwoven fabric 3 and the PET sheet 2 are separated, and a void S is formed.

  Since the same type of article is stored in each recess of the article storage recess 8, even if the nonwoven fabric 3 is pulled downward by the article, the recess is pulled almost evenly for each recess. In the frame part 14, the PET sheet 2 and the non-woven fabric 3 can be kept in a weak state, and the non-woven fabric 3 does not float.

  In the case of a large article storage recess, the nonwoven fabric 3 is firmly attached to the PET sheet 2 with the peripheral part 4 serving as a frame, and the inside thereof is pushed into the inside of the article storage recess with a gap.

  Furthermore, in the case of a heavy storage article, the nonwoven fabric 3 is strongly pulled downward, so that the frame portion 14 has a strength that allows the frame portion 14 to be adhered to the nonwoven fabric to some extent. It can be adjusted in advance so as to be attached.

  In FIG. 3, 16 article storage recesses 8 and 8 ′ are shown. However, by using a container having a separate article storage recess corresponding to this as the lid side, the stored articles are strongly pressed from above. A storage container can be obtained. In addition, by forming a bent portion in the central portion 15 of the container and making the portion bendable, the eight concave portions on the other side can be used as the article-containing concave portion 8 'on the lid side, It is stored and held in a state surrounded by the nonwoven fabric 3 in the article storage recesses 8 and 8 '.

  In addition, it is also possible to hold the upper side of the stored article without damaging the upper side of the 16 article storage recesses 8 and 8 ′ by covering and using another non-woven fabric or a flexible material as a lid.

DESCRIPTION OF SYMBOLS 1 Laminated sheet 2 PET sheet 3 Nonwoven fabric 4 Peripheral part 5 Vacuum forming machine 6 Lower mold 7 Upper mold 8, 8 'Goods accommodation recessed part 9 Plug 10 Inner bottom part 11 Inner side part 12 Bottom part 13 Side part 14 Frame part 15 Center part

Claims (3)

In the laminated sheet bonded laminated nonwoven fabric thin synthetic resin sheet 0.1mm~2.0mm, 1 single processed by the nonwoven fabric of the portion which becomes the periphery of the container as the container is the synthetic resin sheet and firmly The concave portion that becomes a storage portion for storing and attaching articles and the non-woven fabric in the inner portion that becomes the raised upper frame around the concave portion is in a weak state of 1/5 to 1/50 of the adhesive strength of the peripheral portion in the synthetic resin sheet and stuck stacked, the synthetic resin sheet, a concave portion is formed by the suction, the nonwoven fabric is provided between the inner and becomes the bottom and side surfaces of the recess without being sucked together with the synthetic resin sheet isolated disposed in the recess in the unadhesive state having voids, the upper frame portion near the inner side of the recess to retain the state of being weakly adhered with the synthetic resin sheet, the peripheral portion of one container It is firmly attached to the synthetic resin sheet A container made of a laminated sheet of a synthetic resin sheet and a non-woven fabric, characterized in that the state is maintained .   The container made of a laminated sheet of synthetic resin sheet and nonwoven fabric according to claim 1, wherein the thin synthetic resin sheet is selected from any one of PET, PVC, PS, PP, and PE sheets. A method for forming a container using a laminated sheet of a synthetic resin sheet and a nonwoven fabric, comprising the following steps.
1. The lower mold of the vacuum forming machine forms a concave mold for molding a concave part that becomes a storage part in the synthetic resin sheet by suction, and the upper mold is located at the center position of the concave mold from the opening width of the concave mold. Forming a plug as a projection having a small width;
2. The plug is adjusted so that its push-in dimension is shallower than the depth of the concave portion of the lower mold so that the synthetic resin sheet does not contact the inner bottom surface and side surface of the concave portion serving as a storage portion molded by the lower mold. Process,
3. A thin synthetic resin sheet having a thickness of 0.1 mm to 2.0 mm is firmly attached to a peripheral portion corresponding to a size processed as a single container, and the inner side excluding the peripheral portion is attached. comprising portions are adhered by a weak state of 1/5 to 1/50 of the adhesive force of the peripheral portion to form a laminated sheet, the vacuum forming machine the synthetic resin sheet of the laminated sheet to the nonwoven fabric in the top to bottom A step of placing the upper and lower molds in a heated state ,
4). Pressing the laminated sheet by moving the upper and lower mold of the vacuum forming machine, and is sucked only the synthetic resin sheet to the lower side and separated from the nonwoven fabric by suction operation, along a concave mold of the lower die molded as recess comprising a holding section, remaining the nonwoven fabric without being sucked in the width direction and depth as the gap is formed between the inner bottom surface and inner side surfaces formed into concave portions of the synthetic resin sheet is pressed by plug direction is regulated, and the inside of the nonwoven fabric of the upper frame edge part of the peripheral recess holds the weakly adhered state with synthetic resin sheet, the peripheral portion of one container is the synthetic A process that holds the resin sheet firmly attached .

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