Method for preparing full biodegradable environment protection hot melt adhesive

A fully degradable, hot-melt adhesive technology, applied in the direction of adhesives, starch-derived adhesives, adhesive types, etc., to achieve the effects of low production cost, uniform phase, and simple and easy production methods

Inactive Publication Date: 2008-08-27
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most commonly used matrix resins for the production of hot melt adhesives are high-molecular organic substances such as ethylene and its copolymers, polyolefins, styrene and its block copolymers. Due to their struc

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 410 grams of cornstarch into the high blender, then add 20 grams of glycerin, 5 grams of PEG (400), 20 grams of sodium montmorillonite, 20 grams of ethyl cellulose, and 25 grams of calcium stearate. , 3000rpm high-speed stirring for 1 hour to discharge. Add 200 grams of PLA resin in the middle of the obtained modified starch, 150 grams of terpene resin, 100 grams of polyethylene wax, 40 grams of dioctyl phthalate, 10 grams of 2,6-di-tert-butyl p-cresol, Then stir and mix evenly at a low speed, add it to the preheated extruder hopper, set the temperature from the feed port to the head of the extruder at 120-180°C, and extrude at a screw speed of 80rpm, and the extruded product is granulated to obtain a hot melt adhesive. product.

Embodiment 2

[0023] Add 320 grams of cornstarch into the blender, then add 10 grams of glycerin, 15 grams of nickel-based montmorillonite, 10 grams of methyl cellulose, 20 grams of glyceryl monostearate, and 25 grams of calcium carbonate. , 1000rpm high-speed stirring for about 30 minutes to discharge. Add 300 grams of PCL, 240 grams of terpene resin, 50 grams of polyethylene wax, 10 grams of 4,4' thiobis (3-methyl-6-tert-butyl) phenol in the modified starch obtained, and then low speed Stir and mix evenly, add to the preheated extruder hopper, set the extrusion temperature at 100-150°C, and extrude at the screw speed of 200rpm, and the extruded product is granulated to obtain a hot melt adhesive product. The measured melting point is 160-165°C, and the initial shear strength is 25N / 5.0cm.

Embodiment 3

[0025] Add 400 grams of cornstarch into the high blender, then add 10 grams of urea, 20 grams of water, 5 grams of glyceryl monostearate, 15 grams of magnesium-based montmorillonite, 25 grams of cellulose acetate succinate, light calcium carbonate 25 grams, at a temperature of 50 ° C, 3000 rpm high-speed stirring for about 50 minutes to discharge. Add 200 grams of PBAT resin in the middle of the obtained modified starch, 200 grams of terpene resins, 100 grams of polyethylene wax, 5 grams of 4,4' thiobis(3-methyl-6-tert-butyl)phenol, and then Mix evenly at low speed, add to the preheated extruder hopper, set the temperature of the extruder to 130-170°C, and extrude at a screw speed of 80rpm, and the extruded product is granulated to obtain a hot melt adhesive product.

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Abstract

The invention belongs to the technical field of polymer materials processing, which particularly relates to a method for producing biological fully-degradable environmental-friendly hot melt adhesive. Biological fully-degradable environmental-friendly hot melt adhesive is manufactured through modifying cornstarch and a process technique which is squeezed through blending. The method comprises the following steps: mixing and adding cornstarch and plasticizing agent, obstructing agent, reinforcing agent, lubricating agent and filling material in a stirrer according to proportion, stirring under 80 DEG C and 1000-3000rpm, preparing modified fecula, utilizing a double screw extrusion machine to blend and extrude after modified fecula, biodegradable polyester, plastisol, viscosity modifier, plasticizing agent, antioxidant and filling material are mixed, wherein the temperature of an extrusion machine is 100-180 DEG C, and number of revolution of a screw bolt is 40-200rpm, wherein modified fecula is 40-60%, biodegradable polyester is 0-30%, plastisol is 20-30%, viscosity modifier is 5-10%, plasticizing agent is 0-10%, antioxidant is 0.5-1%, and filling material is 0-10%. Hot melt adhesive which is got by the invention has the advantages of excellent compatibility, uniform products, low production cost, excellent initial viscosity and fully-degradable biology, which can be widely used in the fields such as cartons, unsewn binding of books, nonwoven manufacture and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer material processing, and in particular relates to a preparation method of a fully biodegradable environment-friendly hot melt adhesive. Background technique [0002] In the production of hot melt adhesives, in the past, only its adhesive properties were generally considered, and its degradation was not considered. In recent years, with the sharp increase in the use of hot melt adhesives, the problems caused by them have become increasingly prominent. The most commonly used matrix resins for the production of hot melt adhesives are high-molecular organic substances such as ethylene and its copolymers, polyolefins, styrene and its block copolymers. Due to their structural characteristics, they cannot be degraded or hydrolyzed by microorganisms in the environment. Therefore, many unfavorable factors will be brought to the protection of the environment and the recycling of materials. With the improv...

Claims

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Application Information

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IPC IPC(8): C09J103/04C09J9/00C09J167/00
Inventor 任天斌王永涛朱金鑫何土垚付宏业吴杰任杰
Owner TONGJI UNIV
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