Production method of corn starch and PVA blended plastic film

• Main Author: LIANG JIPENG
• Format: Patent
• Language: Chinese; English
• Published: 11.01.2017
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; CONVEYING; DERIVATIVES THEREOF; GENERAL PROCESSES OF COMPOUNDING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HANDLING THIN OR FILAMENTARY MATERIAL; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PACKAGES; PACKAGING ELEMENTS; PACKING; PERFORMING OPERATIONS; POLYSACCHARIDES; STORING; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING-UP

The invention discloses a production method of a corn starch and PVA blended plastic film. The method comprises the following steps: weighing 20-25 parts of corn starch, fully and uniformly mixing the corn starch with 5-10 parts of sodium hydroxide, transferring the obtained mixture into a reaction kettle, carrying out stirring and an alkalization reaction for 30-60 min, allowing the obtained alkalization reaction product to stand for cooling in order to obtain causterized starch; and fully mixing a 70% ethanol solution with hypochlorous acetic acid crystals, spraying the obtained mixture on the surface of the causterized starch, carrying out an etherification reaction at 60 DEG C for 30-60 min, cooling the obtained etherification reaction product to room temperature, and crushing the cooled etherification reaction product, sieving the crushed etherification reaction product by a 300 mesh sieve in order to obtain carboxy methyl starch (CMS). A cross-linking reaction improves the compatibility and the mechanic