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Hinge cap having biodegradabilty

A biodegradable, hinged lid technology, applied in the field of hinged lids, can solve the problems of non-decomposable, reduced hinge strength, hinge fracture, etc., and achieve the effect of excellent biodegradability

Inactive Publication Date: 2007-09-05
MIKASA SANGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, until now, such hinged lids have been molded from synthetic resins such as polyethylene or polypropylene, but such polyolefin-based polymers are hardly decomposable in the natural environment, and remain semi-permanently in landfills. In land, it can cause problems from an environmental protection point of view
[0007] Therefore, in Japanese Patent Application Laid-Open No. 6-105887, a polylactic acid-molded cover with biodegradability is disclosed. When polylactic acid resin is used for a hinged cover, the hinge strength is reduced in repeated operations of opening and closing the upper cover. Lower, there is a problem that can easily cause the hinge to break

Method used

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  • Hinge cap having biodegradabilty
  • Hinge cap having biodegradabilty
  • Hinge cap having biodegradabilty

Examples

Experimental program
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Effect test

Embodiment 1

[0060] Using a resin with a flexural modulus of elasticity of 550 MPa containing 100 parts by weight of polybutylene succinate, 2 parts by weight of erucamide, and 1.5 parts by weight of bis(dipropylphenyl)carbodiimide, injection molding diagram Hinged cover A shown in 1. After molding, it was stored at room temperature for 3 days, and the hinge strength was measured to be 96.5N. The snap action of the hinge is also good after the lid is opened and closed. Then, the hinge strength of the hinge cover without the upper cover being opened and closed was measured, and it was 182N. Comparing the two, it is known that the hinge strength retention rate is 53%. Recently, in order to evaluate the hydrolysis resistance of the cap, after the cap was molded, it was stored at room temperature for 3 days, and then immersed in warm water at 45°C for two months. After immersion, the appearance of the lid and the snap action of the hinge were checked, and no change was found in the appearan...

Embodiment 2

[0062] A hinge cover A' shown in FIG. 3 was injection molded using a resin having a flexural modulus of elasticity of 350 MPa containing 100 parts by weight of polybutylene succinate adipate and 2 parts by weight of erucamide. After molding, it was stored at room temperature for 3 days, and the hinge strength was measured to be 85.1N. Then, the hinge strength of the hinge cover without the upper cover being opened and closed was measured, and it was 127N. Comparing the two, it is known that the hinge strength retention rate is 67%.

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Abstract

The present invention relates to a hinged cover with biological degradability; the hinged cover is characterized in: it comprises a main body composed of a top wall, a discharge port arranged on the top wall, side walls extending downwards from the edge of the top wall, and a top cover that is connected to the main body via a hinge and designed to close the discharge port; the cover is made of poly alkylene alkanoate with 200 swung dash 900 MPa elastic modulus of bending, preferably 300 swung dash 800MPa elastic modulus of bending.

Description

technical field [0001] The present invention relates to a biodegradable synthetic resin lid, and more specifically, to a biodegradable hinge lid. Background technique [0002] In the prior art, this type of cover can include a hinged cover in which the cover body and the upper cover are connected by a hinge with a thin-walled part (for example, refer to Patent Document 1); or on both sides of the above-mentioned hinge with a thin-walled part, use a A snap hinged cover with a snap function that connects the cover body and the upper cover to the elastic connecting plate (for example, refer to Patent Document 2). [0003] Patent Document 1: Japanese Publication No. 49-26863 [0004] Patent Document 2: Japanese Patent Laid-Open No. 8-301329 [0005] Because the upper cover of these hinged covers is connected with the cover body, there is no need to worry about the upper cover being lost, and the opening and closing operation can be performed with one hand, which is convenient ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D47/08C08K5/20C08L67/00C08L101/16C08K5/09
CPCY02W90/10
Inventor 村上邦夫酒本学
Owner MIKASA SANGYO KK