Degradable resin pellet and molded product using same

Abstract

The present invention relates to a degradable resin pellet and a molded product using the same, and relates to: a resin pellet formed by comprising corn starch as a main component and mixing polyethylene (PE), polyvinyl alcohol (PVA) and the like, having excellent tensile strength and elongation, and having excellent degradability due to biodegradation by a microorganism, photolysis by a photocatalyst and chemical decomposition by a reaction; and a molded product using the same. More specifically, the present invention provides a degradable resin pellet formed by mixing a composition, which isformed by comprising 100 parts by weight of polylactic acid (PLA), 50-150 parts by weight of calcium carbonate (CaCO3), 0.1-10 parts by weight of magnesium, 0.1-10 parts by weight of aluminum, 0.1-10parts by weight of silicon and 0.5-20 parts by weight of calcium, with 50-150 parts by weight of PVA on the basis of 100 parts by weight of PLA, and mixing with 50-150 parts by weight of PE on the basis of 100 parts by weight of PLA.

Description

technical field [0001] The present invention relates to a degradable resin particle and a molded product using it, in particular, to a resin particle with excellent degradability and a molded product using it. Made of polyethylene, polyvinyl alcohol, etc., it has excellent tensile strength and elongation, and has excellent degradability due to biodegradation by microorganisms, photolysis by photocatalysts, and chemical decomposition by reactions. Background technique [0002] In general, synthetic resins as petrochemical products are widely used in various fields due to their excellent physical properties and characteristics such as chemical resistance, transparency, flexibility, and rigidity, but they have the problem that they cannot be degraded after use, and as Environmental pollution caused by waste plastics has emerged as a major social issue, and research on degradable resins has not only been actively carried out, but has also attracted attention worldwide. [0003]...

AI Technical Summary

Problems solved by technology

[0006] In particular, natural high-molecular biodegradable materials such as starch, etc., have a great advantage of being very cheap compared to synthetic resin-based biodegradable materials, so they are judged to be suitable for disposable products and are widely developed and accepted. utilization, but such resins added with natural polymers have the problem of lower required properties

[0007] In addition, polyhydroxyarylate-based resins, polycaprolactone, and the like are excellent in degradability, but have a problem of lack of economic efficiency due to high production costs.

[0008] In addition, polyhydroxyarylate-based resins, polycaprolactone, and the like are excellent in degradability, but have a problem of lack of economic efficiency due to high production costs.

[0009] Degradable resins using starch as a natural polymer are prepared by adding water to starch and thermoplastic synthetic resins as known in EP 032,802, USP 4,900,361, EP326,517, EP 032,802, EP 327,505, WP 90 / 10671, etc. or plasticizers and applying heat and pressure to disrupt the starch structure, whereby although manufactured in the form of thermoplastic mixtures, satisfactory results cannot be obtained

[0010] In addition, degradable resins using starch as a natural polymer have been applied for and known in U.S. Patent No. 4,755,397, No. 4,812,445, No. Esterified starch, etherified starch, oxidized starch, acid-thinned starch and cross-linked starch are obtained by starch denaturation, but currently no satisfactory results have been obtained for biodegradable products

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