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Double-layer container and its manufacturing method

A technology for manufacturing methods and containers, applied in chemical instruments and methods, containers, rigid containers, etc., capable of solving problems such as oxidation of contents

Active Publication Date: 2020-12-22
HEIWA KAGAKU INDSSHO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in a general rigid container, when the container is unsealed and a part of the content is consumed and the remaining content remains in the container after consumption, the volume of external air corresponding to the consumed amount of the content enters the container. , the residual contents are oxidized

Method used

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  • Double-layer container and its manufacturing method
  • Double-layer container and its manufacturing method
  • Double-layer container and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0067] Such as Figure 1a As shown, the double-layer container 10 manufactured by the manufacturing method of the first embodiment includes a mouth portion 12 , a shoulder portion 14 , a cylindrical portion 18 , a bottom portion 20 , and a cap 200 with a spout 300 .

[0068]For the double-layer container 10 manufactured by the manufacturing method of the first embodiment, as Figure 1a with figure 2 As shown, for example the cylindrical side 22 of the cylindrical portion 18 comprises a flexible inner layer 30 comprising a low density polyethylene (LDPE) layer 24 from the inside and a rigid outer layer 32 of polypropylene (PP). There are three layers: an adhesive layer 26 of polyolefin-based adhesive resin or the like, and an ethylene-vinyl alcohol copolymer (EVOH) layer 28 . There is no adhesion between the flexible inner layer 30 and the rigid outer layer 32 and can be easily peeled off.

[0069] In the manufacturing method of the double-layered container of the first emb...

no. 2 Embodiment approach

[0101] The double-layer container 10 manufactured by the manufacturing method of the second embodiment includes a flexible inner layer 30 made of polyamide (PA) and a rigid outer layer 32 made of polypropylene (PP). There is no adhesion between the flexible inner layer 30 and the rigid outer layer 32 and can be easily peeled off.

[0102] For the shoulder neck area 68 of the partial mold 60 for molding the shoulder neck portion 14 of the double-layer container 10, the inner diameter of the parison P is 16.5 mm, the outer diameter R is 20.5 mm, and the outer diameter of the mouth portion 12 of the molded product is 16.5 mm. The diameter PR is 21.5 mm and the inner diameter is 17.3 mm. In this case, the minimum diameter portion of the shoulder portion 14 of the outer layer gap 110 at the parting surface H, that is, the interval RS of the shoulder portion 112 is: 15.5 mm (72.1% of the outer diameter of the parison P). During molding, the temperature of the parison P was 190.0°C,...

no. 3 Embodiment approach

[0105] The double-layer container manufactured by the manufacturing method of the third embodiment includes a flexible inner layer 30 including a low-density polyethylene (LDPE) layer from the inside, and a rigid outer layer 32 made of polycarbonate (PC). Three layers of an adhesive layer such as a polyolefin-based adhesive resin and an ethylene-vinyl alcohol copolymer (EVOH) layer. There is no adhesion between the flexible inner layer 30 and the rigid outer layer 32 and can be easily peeled off.

[0106] The mouth die part 100 and the shoulder neck die part 112 are integrally made of die steel SKD11.

[0107] Regarding the shoulder region 68 of the partial mold 60 for molding the shoulder portion 14 of the double-layer container 10, the inner diameter of the parison P is 23.5 mm, the outer diameter R is 28.5 mm, and the outer diameter of the mouth portion 12 of the molded product is The diameter PR is 29.0 mm and the inner diameter is 23.5 mm. In this case, the minimum diame...

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Abstract

The invention provides a method for manufacturing a double-layer container, which includes a rigid outer container with relatively high rigidity and a soft inner container whose capacity can be changed in the rigid outer container. It is easier to manufacture than a molding device with little variation in which at least a part of the mating surfaces of a pair of part molds when the pair of part molds are brought closer to each other in order to combine them to form a split mold The small outer diameter portion of the parison is clamped to form a gap flash, and the small outer diameter portion from which the gap flash is removed is formed by a cap screwing action to form a gap for introducing external air between the double-layer containers.

Description

technical field [0001] The present invention relates to a double layer container and a method for its manufacture. In more detail, the present invention relates to a double-layer container including a rigid outer container that is partial rigidity and a container capable of changing the capacity in the rigid outer container according to the filling amount of the contents, and a method for manufacturing the same. The flexible inner container, the double-layered container can be easily manufactured using molding materials and molding devices that have not changed much compared with conventional ones. Background technique [0002] It is desirable for a container to prevent oxidation of the contents without contacting the outside air even if a part of the contents is consumed to reduce the amount of the contents. [0003] That is, in a general container, after filling the contents, it is easy to prevent oxidation of the contents by vacuuming the space inside the container or fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C49/04B65D1/02B29C49/22B32B1/00
CPCB29C49/04B29C49/22B65D1/02B29C49/4802B29K2023/0633B29K2023/086B29K2023/12B29K2069/00B29K2077/00B29L2031/712B29L2031/7158B32B1/00B29C2049/4807B32B27/08B32B27/306B32B27/32B32B27/34B32B27/365B32B2439/00B65D1/0215B65D1/0246B65D23/02B65D51/16
Inventor 畠山和幸畠山治昌
Owner HEIWA KAGAKU INDSSHO