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JP-2026075625-A - Soft fruit packaging

JP2026075625AJP 2026075625 AJP2026075625 AJP 2026075625AJP-2026075625-A

Abstract

[Problem] To provide a new packaging for soft fruits that prevents damage to soft fruits due to vibration during transportation. [Solution] A soft fruit packaging comprising a container having a flat, substantially rectangular container bottom and four container side walls extending upward from the entire periphery of the container bottom and forming a container with an open top, a plurality of soft fruits stored in a storage space surrounded by the container side walls in a single layer or in two layers, and a heat shrinkable film that covers the plurality of soft fruits and the entire periphery of the container, wherein the plurality of soft fruits satisfy specific conditions. A soft fruit packaging comprising a container having a container bottom with a soft fruit storage section formed therein, or a container in which a buffer tray with a soft fruit storage section formed therein is arranged in the storage space, a plurality of soft fruits stored in the soft fruit storage section, and a heat shrinkable film that covers the plurality of soft fruits and the entire periphery of the container, wherein the plurality of soft fruits satisfy specific conditions. [Selection Diagram] Figure 4

Inventors

  • 三角 将洋
  • 大山 敏勝
  • 谷岡 直美
  • 曽根 一純

Assignees

  • 興人フィルム＆ケミカルズ株式会社
  • 国立研究開発法人農業・食品産業技術総合研究機構

Dates

Publication Date
20260508
Application Date
20251224
Priority Date
20241022

Claims (8)

  1. A soft fruit package comprising a container having a roughly rectangular container bottom and four container side walls extending upward from the entire periphery of the container bottom and forming a container with an open top; a buffer tray disposed inside the container and having a soft fruit storage section with a plurality of recesses for storing a plurality of soft fruits; a plurality of soft fruits stored in the soft fruit storage section; and a heat-shrinkable film that covers the plurality of soft fruits and the entire periphery of the container, wherein the soft fruit package satisfies the following conditions. Condition (a): For the soft fruit storage section of the buffer tray, the side opposite to the side in contact with multiple soft fruits is in contact with the bottom of the container. Condition (a): Multiple soft fruits are in contact with a heat-shrinkable film.
  2. The soft fruit packaging according to claim 1, wherein the soft fruit is a strawberry.
  3. The soft fruit packaging according to claim 1, wherein the heat-shrinkable film is provided with numerous small through-holes, and these small through-holes are concentrated at the top of the open container.
  4. The soft fruit packaging according to claim 1, wherein the heat-shrinkable film comprises a layer containing a mold inhibitor and/or an anti-fogging agent.
  5. The aforementioned heat-shrinkable film is At 120°C, the thermal shrinkage rates in the MD (longitudinal direction) and TD (width direction) are both 58% to 67%, the thermal shrinkage force in the MD at 120°C is 0.25 N/cm or less, and the thermal shrinkage force in the TD at 120°C is 0.22 N/cm or less. The soft fruit packaging according to claim 1, wherein the tensile modulus of MD is 0.25 GPa to 0.29 GPa, and the tensile modulus of TD is 0.25 GPa to 0.27 GPa.
  6. The soft fruit packaging according to claim 1, wherein the heat-shrinkable film contains a plant-derived polyethylene resin.
  7. The soft fruit packaging according to claim 1, wherein the cushioning tray is made of a foamed synthetic resin sheet, and the foamed synthetic resin sheet is made of at least one foamed synthetic resin selected from the group consisting of foamed polystyrene, foamed polyethylene, foamed polypropylene, and foamed polyurethane.
  8. The soft fruit packaging according to claim 1, wherein, with respect to the soft fruit in the soft fruit packaging, the reduction rate of the electrical conductivity of the aqueous solution in which the soft fruit was immersed after a vibration test measured by the evaluation method described below is 20% or more compared to the soft fruit packaging according to claim 1, in which the soft fruit was packaged with a non-heat-shrinkable film instead of a heat-shrinkable film so as to cover at least the upper part of the opening of the container. [Electrical conductivity of aqueous solution in which soft fruits were immersed after vibration testing] (1) Vibration test Using a vibration testing apparatus, a sinusoidal uniform sweep vibration test will be performed for 30 minutes on a container containing one or more soft fruit packages under the following conditions. (Conditions for vibration testing) Lower frequency limit: 10 Hz, upper frequency limit: 40 Hz, sweep time: 10 minutes, number of sweeps: 3, vibration direction: simultaneous of three axes: X-axis (horizontal), Y-axis (horizontal), Z-axis (vertical), gravitational acceleration: 0G to 3G (m/ s² ) (frequency dependent). (2) Measurement of electrical conductivity After the vibration test, the soft fruits removed from the container are placed in a solution of pure water (electrical conductivity 1.0 μS/cm) six times the total weight of the soft fruits. The aqueous solution in which the soft fruits are immersed is stirred for 30 minutes, and the electrical conductivity of the aqueous solution measured using an electrical conductivity meter is taken as the electrical conductivity of the aqueous solution in which the soft fruits were immersed after the vibration test.

Description

This invention relates to a soft fruit packaging material. More specifically, it relates to a soft fruit packaging material that prevents damage to soft fruit due to vibration during transport. To maintain the quality of harvested fruit and deliver it to market, it is necessary to protect the fruit from shocks during transportation. For example, delicate fruits such as strawberries, with their thin skins and soft flesh, are easily damaged by vibrations during transport, requiring special precautions. Due to the circumstances described above, a fruit storage tray has been proposed that has fruit storage recesses formed in a thin thermoplastic synthetic resin sheet for individually storing relatively fragile fruits such as strawberries (Patent Document 1). Furthermore, a packaging system has been proposed that includes a container X containing an inner container for individually storing fruit (Patent Document 2). Japanese Patent Publication No. 2011-102152Japanese Patent Publication No. 2021-75310 Figure 1 is a schematic perspective view showing one embodiment (single-layer flat packing) of the soft fruit packaging body of the present invention.Figure 2 is a schematic top view showing one embodiment (single-layer flat packing) of the soft fruit packaging body of the present invention.Figure 3 is a schematic cross-sectional view along the line A-A' shown in Figure 2.Figure 4 is a schematic perspective view showing one embodiment of the soft fruit packaging of the present invention (two-tiered packaging).Figure 5(a) is a schematic top view showing one embodiment of the soft fruit packaging of the present invention (two-tiered packaging). Figure 5(b) is a schematic bottom view showing one embodiment of the soft fruit packaging of the present invention (two-tiered packaging).Figure 6 is a schematic cross-sectional view along the line B-B' shown in Figure 5(a).Figure 7 is a schematic cross-sectional view of another embodiment (single-layer flat packing) of the soft fruit packaging body of the present invention.Figure 8 is a schematic cross-sectional view of another embodiment (two-tiered packaging) of the soft fruit packaging body of the present invention.Figure 9 is a graph showing the electrical conductivity of the soft fruit immersion solution after the vibration test.Figure 10 is a graph showing the percentage of damaged area of soft fruit after vibration testing.Figure 11 is a schematic exploded perspective view showing the configuration of one embodiment of the soft fruit packaging body of the present invention.Figure 12 is a schematic top view showing one embodiment of the soft fruit packaging body of the present invention.Figure 13 is a schematic cross-sectional view along the line C-C' shown in Figure 12.Figure 14 is a schematic exploded perspective view showing the configuration of one embodiment of the soft fruit packaging body of the present invention.Figure 15 is a schematic top view showing one embodiment of the soft fruit packaging body of the present invention.Figure 16 is a schematic cross-sectional view along the line D-D' shown in Figure 15.Figure 17 is a graph showing the electrical conductivity of the soft fruit immersion solution after the vibration test. The embodiments of the present invention will be described in detail below with reference to the drawings. Figures 1 to 8 and 11 to 16 attached to this specification are schematic diagrams, and for ease of understanding, the shape, scale, and aspect ratio of each part have been modified or exaggerated from the actual object. Furthermore, the hatching in the drawings indicates a cross-section of the member. [Soft fruit packaging (single layer flat packing)] The present invention relates to a soft fruit packaging comprising a container having a flat, substantially rectangular container bottom and four container side walls extending upward from the entire periphery of the container bottom and forming a container with an open top, a plurality of soft fruits stored in a single layer in a storage space surrounded by the container side walls, and a heat-shrinkable film that covers the plurality of soft fruits and the entire periphery of the container, wherein the plurality of soft fruits satisfy the following conditions. Condition (1): Multiple soft fruits are in contact with at least one other. Condition (2): At least one soft fruit is in contact with each of the four side walls forming the container. Condition (3): Multiple soft fruits are in contact with the heat-shrinkable film. Condition (4): Multiple soft fruits are in contact with the bottom of the container. Figure 1 shows a soft fruit package 1 in which multiple soft fruits 6 are packed in a single layer in the storage space 5 of a container 2 (packed horizontally to the bottom of the container without stacking the soft fruits) to satisfy conditions (1), (2), (3), and (4), and the multiple soft fruits 6 and the entire perimeter of the container 2 are wrapped in heat-shrinkable film 7. Note