Totally Biodgradable Plastic Master Batch & Its Preparation
OwnerShaozhong Dinginventor
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Abstract
The present invention presents a totally biodegradable plastic master batch and its preparation methodology. Three main steps in preparation of the totally biodegradable plastic master batch include step (1): Refining and dehydration of starch, followed by step (2): mixing of multiple ingredients, followed by step (3): molding of product derived from previous step (2). Four preferred embodiments are introduced, while degradation performance of each preferred embodiment is given in terms of its degradation efficiency value.
Claims12
A totally biodegradable plastic master batch is comprised of having 100 parts of starch and 0.2˜1.0 parts of anti-caking agents refined and dehydrated twice before being kneaded with 3˜12 parts of a coupling agent to avail a modified starch;
- the modified starch being then mixed with 5˜20 parts of a dispersing agent;
- 30˜90 parts of polycyclic-lactone, 12˜35 parts of a plasticizer, 3˜18 parts of a chemical degradation promoter, and 0.2˜1.2 parts of an oxidization promoter by weight.
A methodology for the preparation of a totally biodegradable plastic master batch is comprised of the following steps:
- (1) Refining and dehydration of Starch:
- (a) starch, water, and anti-caking agent are mixed and blended into a thick solution, the solution is then poured into a disperser machine for 20˜30 minutes to grind the starch into that with a grain size of 1-10 μm with the refining temperature controlled within the range of 40˜60° C., the thick solution of the primary starch is then dehydrated through an ultra-filtration unit;
- (b) the dehydrated primary starch is further mixed with glycerin or corn oil and blended into thick solution before being poured into the dispersing machine for 40˜50 minutes to be refined to that with a grain size less than 1 μm at a temperature controlled within the range of 50˜70° C., and the secondary starch is then dehydrated through the ultra-filtration unit to reduce its water containment to be less than 0.5% before being placed into a centrifuge to separate the oil from the powder;
- and (c) finally, the resultant starch power availed from (b) and the coupling agent are poured into a high-speed kneader to be kneaded for 20˜30 minutes to come out of a modified starch powder 1;
- (2) Mixing—Polycyclic-lactone, plasticizer, dispersing agent, oxidization promoter, chemical degradation promoter in sequence are added into the modified starch 1 availed from Step 1 is added into the kneader for 20˜30 minutes;
- and
- (3) Molding:
- the product availed from Step 2 is then placed into a dual-screw, dual-exhaust extrusion granulator to come out the plastic master batch.
Dependencies are inferred from the claim text.