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Heat stabilizer for producing PVA product and method for producing PVA product

A technology of heat stabilizer and stabilizer, which is applied in the direction of flat products, applications, household appliances, etc., and can solve problems such as non-continuous production

Inactive Publication Date: 2009-10-28
INST OF PLASTICS PROCESSING & APPL OF LIGHT IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The higher the temperature, the longer the heating time, and the faster the oxidative decomposition. Therefore, the oxidation of PVA film at high temperature is the main reason why it cannot be continuously produced in large-scale industrial production.

Method used

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  • Heat stabilizer for producing PVA product and method for producing PVA product
  • Heat stabilizer for producing PVA product and method for producing PVA product
  • Heat stabilizer for producing PVA product and method for producing PVA product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] 100 parts of 1788 polyvinyl alcohol, 10 parts of sorbitol, 5 parts of acrylamide, 0.02 parts of calcium hydroxide, 0.02 parts of calcium sulfate, 1 part of nano hydrotalcite, 2 parts of AO-13, 0.5 parts of AO-28, 1 part DSTP, 1 part of pentaerythritol tetrastearate, 0.3 parts of zinc stearate were mixed at 30°C-80°C for 30-50 minutes, extruded and granulated in a twin-screw extruder at 200-240°C, and the above pellets were mixed in a single The film is blown at 230-240° C. under 30-50% relative humidity in a screw extruder to obtain a thickness of 30-45 μm, and the film ruptures and dissolves at 25° C. for 35S. The torque of the pellets after banburying is as follows: Figure 5 As shown in curve 2, after the heat stabilizer is added, the corresponding torque rise rate gradually decreases, and the torque rise rate represents the increase rate of the viscosity of the melt system, which can represent the speed of PVA thermal aging rate. The decrease in the torque rise rat...

Embodiment 2

[0087] 100 parts of 1799 polyvinyl alcohol, 10 parts of polyethylene glycol, 10 parts of acrylamide, 15 parts of ethylene glycol, 0.5 parts of calcium hydroxide, 0.01 parts of copper phosphate, 3 parts of nano china clay, 1 part of AO-16, 0.3 parts AO-28, 0.5 part of TNP, 0.5 part of glyceryl monooleate, 3 parts of dibasic lead stearate were mixed at 50-100°C for 40-80 minutes, and extruded in a twin-screw extruder at 200-250°C pellets, blow the above pellets into a film at 200-250°C in a single-screw extruder at a relative humidity of 30-50%, to obtain a thickness of 70-80 μm, the film is insoluble in deionized water at 25-35°C, and is 60-80 ℃ deionized water 15-60S rupture and dissolve.

Embodiment 3

[0089] 100 parts of 1799 polyvinyl alcohol, 30 parts of sorbitol, 10 parts of acrylamide, 5 parts of oleic acid amide, 0.002 parts of magnesium hydroxide, 0.01 parts of copper phosphate, 0.5 parts of DSTP, 2 parts of nano china clay, 2 parts of AO-1, 0.2 parts of AO-5, 0.3 parts of AO-31, 0.5 parts of TPP, 0.5 parts of glyceryl monooleate, 0.2 parts of dibasic lead stearate, 0.5 parts of tridecyl stearate were mixed at 150°C for 30 minutes, Extrude and granulate at 180-250°C in a twin-screw extruder, and the torque of the pellets after banburying is as follows: Figure 5 As shown in curve 3, after the heat stabilizer is added, the corresponding torque rise rate gradually decreases, and the heat stability increases. Blow the above pellets into a film at 200-250°C in a single-screw extruder at a relative humidity of 50% to obtain a thickness of 70-80 μm, which is insoluble in deionized water at 25°C and deionized at 50-80°C 15S-150S breaks and dissolves in water.

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Abstract

The invention discloses a heat stabilizer for processing and preparing polyvinyl alcohol granules by a dry method, a method for processing and preparing PVA granules or films by the dry method, and a product obtained by the method.

Description

technical field [0001] The invention relates to a heat stabilizer for dry processing of polyvinyl alcohol pellets, a method for dry processing of PVA pellets or films, and products obtained by the method. Background technique [0002] Polyvinyl alcohol has been recognized as a water-soluble and environmentally friendly material, and its products have been used in many fields, for example, films are used as packaging materials, or as printing transfers or non-woven fabrics, etc., and can also be used as environmentally friendly shopping bags It can be used with garbage bags; the gel compound formed by the compatibility of polyvinyl alcohol and metal can replace cartilage and effectively repair joint damage; and prepare tissue engineering scaffold materials, etc. [0003] The known preparation methods of polyvinyl alcohol film and its products usually contain the following two types: the one is wet processing, the polyvinyl alcohol raw material is mixed with at least one compo...

Claims

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Application Information

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IPC IPC(8): C08K13/02C08K3/22C08K3/30C08K3/34C08K5/521C08K5/378C08K5/38C08K5/103C08K5/098C08L29/04B29B9/12B29C47/92B29C49/78B29L7/00
Inventor 项爱民王建超
Owner INST OF PLASTICS PROCESSING & APPL OF LIGHT IND
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