PRODUCE OF POLYVINYL ALCOHOL BIODEGRADABLE FILMS SOLUBLE IN WATER AT DIFFERENT TEMPERATURES (BIOLON)

Abstract

In recent years humans have experienced many industrial and technological advances in various fields. One such technology that is widely used in nowadays is the plastic film technology. Plastic films of various thicknesses and sizes are widely used in different areas of life. But these products are very damaging to the environment and endanger the lives of humans All this however, no suitable product has yet been found to replace it. Therefore, we decided to produce a new film (biolon) to replace the old plastic films in order to overcome the problems related to the use of them. Biolon is biodegradable and soluble in different temperature water.

Claims

1. Production of biodegradable film of polyvinyl alcohol, soluble in water at different temperatures with the following ingredients: 1. Water 2. Polyvinyl alcohol 3. Glycerin 4. Sorbitol 5. Stearyl alcohol

2. PVA film—Soluble in different temperature water—listed in claim No. 1, called “Biolon”.

3. Biolon film listed in claim No. 2 is intended for the production of all kinds of films in the pharmaceutical, food, industrial and sanitary grades.

4. Biolon film mentioned in claim No. 3 is intended to make nylon types in a variety of sizes and colors.

5. Biolon film mentioned in claim letter No. 4 is intended for the making of all types of packaging film and shopping bags.

6. The Biolon film mentioned in claim No. 5 has the ability to decompose in the environment in a period of 3 months.

7. Biolon film mentioned in claim No. 6 is capable of dissolving in water at different temperatures.

8. Biolon film mentioned in claim No. 7 does not release any toxic and harmful substances when it is decomposed.

9. The Biolon film mentioned in claim No. 8 is completely biodegradable.

10. The innovative element with this invention is at the speed of decomposition and harmlessness to the environment.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0024] This project and patent don't have drawing.

DESCRIPTION OF EMBODIMENTS

[0025] Biolon is a biodegradable film and also, soluble in different temperature water.

EXAMPLES

[0026] 1. At first 410 g of warm water was added to 90 grams of PVA 86% hydrolysis degree. Afterward, added 10 g of 50% aqueous Sodium hydroxide solution as a catalyst. The mixture was stirred at 70° C. for 8 hours and further reacted for 20 hours at the room temperature. The resulting reaction mixture was neutralized and added dropwise to a large amount of methanol to reprecipitate the acetalized product of PVA formed. The acetalization degree of the product obtained was 5.2 mole %. A mixture of 100 parts by weight of the acetalized product with 9 parts by weight of sorbitol, 5 part by weight of stearyl alcohol and 3 parts by weight of glycerin was dissolved in water and cast to prepare a film having a thickness of 50μ. The dissolution time of the film obtained was about 40 seconds in water at 20° C.

[0027] 2. At first 0.1% of nonionic anti-foam agent (Triton CF-32) and 9 ml of sodium hydroxide solution (50%) added to a 10% solution of polyvinyl alcohol 98% hydrolyzed and then solubilizing by heating the dispersion to a temperature of 81° C. to 105° C. with vigorous stirring. To eighty parts of the polyvinyl alcohol solution (10% solids), 1.25 parts of glycerin and 1.25 parts of sorbitol plasticizers is added. The casting solution is adjusted to 100 parts with water (9.5 parts water) to form an aqueous casting solution containing 12.5 parts (12.5%) of active ingredients, i.e., polymers and plasticizer. All ingredients are blended using vigorous agitation to assure homogeneity. From the aqueous casting solution films are prepared with both a 4-inch and 8-inch Gardener film casting knife using a blade clearance of 22-24 mils. The casting solution is deposited on either Mylar of plasticized polyvinyl chloride sheets as the casting surface. After drying in air overnight, clear films are obtained having a thickness of 38μ. The dissolution time of the film obtained was about 40 seconds in water at 60° C.

[0028] 3. At first 13g of sodium hydroxide was added to 425 g of warm water. Afterward, added to 75 grams of PVA 98.5 mole % hydrolysis degree. The mixture was stirred at 70° C. Afterward, added 350 g of glycerin 25%-sorbitol 30% stearyl alcohol 45% composition as plasticizer to the reaction vessel and stirred it for 5 hours and further reacted for 20 hours at the room temperature. The resulting reaction mixture was neutralized and added dropwise to a large amount of acetone to reprecipitate the acetalized product of PVA formed. The acetalization degree of the product obtained was 7.7 mole %. The resultant acetalized product was dissolved in water, cast on a glass plate and dried at about 80° C. to prepare a film having a thickness of 30μ. The film was completely dissolved by dipping in water at 80° C. for about 45 seconds with stirring.

INDUSTRIAL APPLICABILITY

[0029] The produced Biolon easily decomposes in nature or water. In order to attain an industrial base for sustainable development and conservation of natural habitats, the production of a new generation of polymeric materials is on the agenda of many advanced countries and assumes a special place. The use of Biolon in the packaging, pharmaceutical, agriculture and other industries has attracted the attention of manufacturers and consumers of the products of these industries.

REFERENCE SIGNS LIST

[0030] 1. Description

[0031] 2. Technical Field

[0032] 3. Background Art

[0033] 4. Summary of Invention

[0034] 5. Technical Problem

[0035] 6. Solution to Problem

[0036] 7. Advantageous Effects of Invention

[0037] 8. Brief Description of Drawings

[0038] 9. Description of Embodiments

[0039] 10. Examples

[0040] 11. Industrial Applicability

[0041] Reference to Deposited Biological Material

[0042] Sequence Listing Free Text

[0043] Citation List

[0044] Patent Literature

[0045] PTL1:

[0046] Non Patent Literature

[0047] NPL1: