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Packaging method for granular substance and device for packaging granular substance

A packaging method and technology for granular materials, which are applied in the types of packaging items, special packaging items, packaging and other directions to achieve the effect of preventing foaming

Inactive Publication Date: 2015-04-29
MITSUBISHI GAS CHEM CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the usage of polycarbonate resin molded products (hereinafter referred to simply as "molded products") increases to allow parallel light to be incident on a plane such as a light guide plate, the problem of transparency, which has not been a problem until now, has become apparent.
That is, the molded product is colored yellow (amber), which makes it difficult to use in fields requiring high transparency.

Method used

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  • Packaging method for granular substance and device for packaging granular substance
  • Packaging method for granular substance and device for packaging granular substance
  • Packaging method for granular substance and device for packaging granular substance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0138] Example 1 relates to the granular material packaging device of the present invention and the granular material packaging method of the present invention. In addition, Example 1 relates to the injection molding method of the thermoplastic resin, and also relates to the first mode of the injection molding machine. In addition, in the following description, the term "particulate" used for "raw material thermoplastic resin pellets" may be replaced and described.

[0139] Respectively Figure 1A with Figure 1B A conceptual diagram and a schematic partial cross-sectional view of a closed container and the like for explaining the granular material packaging device of the present invention and the granular material packaging method of the present invention are shown in FIG. In addition, in Figure 2A , Figure 2B and image 3 Shown in is a conceptual diagram of a closed container and the like for explaining the granular material packaging method of the present invention. In these...

Embodiment 2

[0211] Embodiment 2 is a modification of Embodiment 1. In Example 2 or Examples 3 to 20 described later, the amount of dissolved oxygen per 1 gram of the raw material thermoplastic resin pellets was also 0.015 cm during packaging and storage. 3 Below, the moisture content of the raw material thermoplastic resin pellets is 2×10 2 Below ppm. In addition, the oxygen concentration inside the airtight container 60 is 2% by volume or less (specifically, 1×10 3 ppm or less), the total moisture content of the atmosphere in the airtight container 60 is 0.2 mg per 1 gram of the raw material thermoplastic resin pellets.

[0212] In addition, in Example 2 or Example 4 and Example 6 described later, the pressure inside the airtight container 60 was 1.3×10 4 Pa. In addition, in Examples 8 to 10, the pressure inside the airtight container 60 was 1.3×10. 4 Pa below. Immediately after the production of raw material thermoplastic resin pellets (raw material polycarbonate resin pellets), the raw m...

Embodiment 3

[0215] Embodiment 3 is a modification of Embodiment 1. In Example 3, the airtight container 60 was made of a nylon / gas barrier multilayer sheet package (packaging bag), more specifically, a nylon film / MXD nylon film / nylon film. In addition, the oxygen permeability of the airtight container 60 related to the oxygen and gas barrier properties is 50 [cm 3 / (m 2 ·24h·atm), 20~25℃]. In addition, as in Example 1, the oxygen concentration inside the airtight container 60 was 1×10 3 Below ppm.

[0216] The same raw material thermoplastic resin pellets as in Example 1 were packaged in a closed container 60 in the same manner as in Example 1, and were stored for the same time as in Example 1. After that, the airtight container 60 is unsealed, and the raw material thermoplastic resin pellets are directly put into the hopper provided in the injection molding machine. The amount of dissolved oxygen [C] is 0.015cm 3 / G or less. In addition, the molded product satisfies a parallel transmitta...

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Abstract

In this packaging method for a granular substance, an inert gas introduction pipe (71) and an inert gas exhaust pipe (73) are inserted into the interior of a sealed container (60). In a state where the interior of the sealed container (60) is filled with a granular substance (40), an opening (61) is temporarily closed, and then an inert gas is introduced into the interior of the sealed container (60) by way of the inert gas introduction pipe (71). The inert gas introduced into the interior of the sealed container (60) is expelled through the inert gas exhaust pipe (73), thereby replacing the interior of the sealed container (60) with inert gas, after which the inert gas introduction pipe (71) and the inert gas exhaust pipe (73) are removed from the sealed container (60) and the sealed container (60) is closed.

Description

Technical field [0001] The invention relates to a packaging method and a granular packaging device. Background technique [0002] Polycarbonate resin has excellent heat resistance, mechanical properties, and has many excellent properties such as high dimensional accuracy, and is widely used in different fields. However, in molded products made of polycarbonate resin (hereinafter referred to as "molded products"), as the use of parallel light incident on a plane such as a light guide plate increases, the problem of transparency, which is not a problem at present, becomes apparent. In other words, the color of the molded product is markedly yellow (amber), which makes it difficult to use it in fields requiring high transparency. [0003] In order to solve such problems, for example, Japanese Patent Laid-Open No. 06-145337 stipulates pretreatment during the synthesis of polycarbonate resin, and Japanese Patent Laid-Open No. 05-331277 and Japanese Patent Application No. 2002-533544 di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65B31/06
CPCB65B31/06B65B1/28B65B31/042B65B31/048B65B51/146B29K2069/00B29C45/0001B65B31/04
Inventor 造田敬一茅野义弘中尾公隆鸨田敦大鲍哈达
Owner MITSUBISHI GAS CHEM CO INC
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