WO2010111899A1

WO2010111899A1 - Biomaterial foamed plastic comprising water as foaming agent and preparation method thereof

Info

Publication number: WO2010111899A1
Application number: PCT/CN2010/070174
Authority: WO
Inventors: 张先炳; 汤运章; 张立斌; 任超
Original assignee: 武汉华丽生物材料有限公司
Priority date: 2009-04-03
Filing date: 2010-01-14
Publication date: 2010-10-07
Also published as: CN101519503A

Abstract

A biomaterial foamed plastic comprising water as foaming agent is made of the following raw materials (based on weight parts): 50-80 parts of renewable biomaterial, 5-25 parts of water, 5-40 parts of polyolefin, 3-10 parts of plasticizer, 0-5 parts of heat stabilizer, 0.5-5 parts of compatibilizer, 0-3 parts of nucleating agent and 0-3 parts of lubricant. The preparation method of the foamed plastic comprises the following steps: 1) sequentially adding said raw materials according to its ratio to high speed mixer, stirring at 60-150℃ for 3-30mins, mixing uniformly, cooling and discharging; 2) adding the uniform material obtained above to normal screw extruder, extruding and foaming at 90-200℃. The expansion ratio of the foamed product obtained is between 5-50 times; the density is 0.01-0.1g/cm³; and the product can be used in food package, industrial product package and the like.

Description

Biomass foamed plastic with water as foaming agent and preparation method thereof

The present invention relates to a foamed packaging material of a biomass material which can be used for packaging food packaging and industrial products, and more particularly to a foaming plastic material for biomass material using water as a foaming agent and a preparation method thereof. Background technique

At present, petroleum-derived polystyrene, polyvinyl chloride, polyurethane and other foams are widely used as cushioning packaging materials. These foams have the advantages of light weight and large volume, but they are difficult to rot and degrade, and are becoming increasingly global. Public hazard.

The production of foamed materials from renewable sources is an effective way to solve energy and environmental problems. For example, the Eco-form series of loose fill developed by National Starch Chemical Co., Ltd. is prepared from high linear and deformed starch. Although the material has good performance and is fully biodegradable, it is expensive and limited in use. . Chinese patent CN1381519A uses rosin and starch and some additives to foam into a foaming material with a certain strength. However, in general, the biodegradable cushioning packaging material produced by pure starch has high brittleness, and the performance is easily affected by the environment, and cannot be widely applied. From the point of view of the production process, many foaming materials produced by starch are produced by molding or baking. For example, Chinese patents CN1361048A and CN1052187C produce cushioning packaging materials by molding, and continuous industrialization cannot be realized. CN1563172A uses thermal oxygen degradation of polypropylene and starch as the main raw material, and is produced by extrusion foaming method, but it is necessary to separately add physical or chemical foaming agent from the injection port of the preparation, and a special extrusion foaming machine must be used. Can produce, no The method is produced using a conventional screw extruder. Summary of the invention

The object of the present invention is to provide a foaming material for biomass material with water as a foaming agent, which has excellent performance, low price and high biomass in materials. And the production process is single, and the ordinary screw extrusion equipment can be used for extrusion foaming.

Another object of the present invention is to provide a process for preparing a foamed plastic using water as a foaming agent. The technical scheme of the present invention is achieved by preparing the raw materials of the following components in parts by weight: 50 to 80 parts of renewable biomass raw materials, 5 to 25 water, 5 to 40 parts of polyolefin, 3 to 10 parts of plasticizer, 0 to 5 parts of heat stabilizer, 0.5 to 5 parts of compatibilizer, 0 to 3 parts of nucleating agent, 0 to 3 parts of lubricant.

A preferred technical solution of the present invention is: It is prepared from the raw materials of the following components in parts by weight: 60 parts of renewable biomass raw material, 20 water, 10 parts of polyolefin, 5 parts of plasticizer, 2 parts of heat stabilizer, 1 part of compatibilizer, 1 part of nucleating agent, 1 part of lubricant.

The biomass material described therein is a plurality or one or more of starch, cellulose, and lignin. The cellulose is preferably bamboo powder, straw powder, grass powder, cotton straw powder, bagasse; lignin is preferably wood powder. In the preparation, water is first added as a foaming agent to the biomass raw material to have a water content of 5 to 30%.

The polyolefin is one or more of polyethylene, polystyrene, and polypropylene; the plasticizer is glycerin, ethylene glycol, sorbitol, xylitol, maltitol, diethylene glycol, One or more of polyethylene glycol, or urea; the heat stabilizer is stearic acid 4 bow, stearic acid, barium stearate, dibutyl tin dilaurate, di-n-octyl tin dilaurate Or one or more of calcium complex stabilizers; the compatibilizer is a silane coupling agent, an aluminate coupling agent, an ethylene-vinyl acetate copolymer EVA, One or more of ethylene-acrylic acid copolymer EAA; the nucleating agent is one or more of sodium benzoate, calcium carbonate, talc, white carbon black; the lubricant is ethylene double One or more of stearic acid amide, polyethylene wax, oxidized polyethylene wax, stearic acid 4 bow, polypropylene wax or liquid paraffin.

The preparation method of the invention comprises the following steps:

1) The weight ratios are: 50 ~ 80 parts of wet biomass, 5 ~ 25 water, 5 ~ 40 parts of polyolefin, 3 ~ 10 parts of plasticizer, 0 ~ 5 parts of heat stabilizer, 0.5 ~ 5 parts of compatibilizer, 0 ~ 3 parts of nucleating agent, 0 ~ 3 parts of lubricant, added to the high-speed mixer according to the ratio, stirred at 60 ~ 150 ° C for 3 ~ 30min, evenly mixed, Cool down and discharge.

2) Add the above-mentioned mixed materials to a common screw extruder, and extrude and foam at 90~200 °C, control the temperature of the front part of the screw to be 90~120 °C, and the temperature of the latter part is 140~200°. C is extruded as soon as possible. After the material is extruded, the pressure is suddenly reduced to normal pressure, and the moisture in the material suddenly expands to cause the material to foam. After cooling, the foamed material is obtained. By using different dies, it can be made into a sheet, strip or other shape of foam cushioning packaging material.

The invention has the following characteristics:

1) Using renewable biomass resources as the main raw material, using crop waste resources, saving some petrochemical resources, and the products obtained are cheap.

2) Using water as a foaming agent, it is economical and environmentally friendly.

3) No special foaming extruder is needed. It is not necessary to add the foaming agent to the material in a special way. As long as the ordinary screw extruder can be extruded and foamed.

4) The foaming ratio of the obtained foamed material is between 5 and 50 times, and the density of the foamed product is between 0.01 and O.lg/cm ³ . detailed description

The present invention is further described below in conjunction with the embodiments:

Example 1:

70kg of corn starch was first added to 20kg of water, then 20kg of polyethylene, 5kg of glycerin, 2kg of calcium stearate, 1kg of silane coupling agent, 1kg of sodium benzoate, 1kg of ethylene bisstearamide to high speed In the mixer, stir at 60~140 °C for 3~30min, mix evenly, cool down and discharge. The above materials were placed in a twin-screw extruder and extruded at 90 to 200 ° C for extrusion. The temperature of the front section of the control screw is 90 °C, the temperature of the rear part of the screw is gradually increased to 140 °C, and the foaming is extruded as soon as possible, so that the material stays in the high temperature zone for too long.

Example 2:

60kg of corn starch is first added to 20kg of water, then 30kg of polypropylene, 5kg of ethylene glycol, 2kg of stearic acid 4 bow, 1kg of silane coupling agent, 1kg of carbonic acid 4 bow, 1kg of ethylene double hard Add the fat amide to the high-speed mixer, stir at 60~140 °C for 3~30min, mix evenly, cool down and discharge. The above materials were placed in a twin-screw extruder and extruded at 90 to 200 ° C for extrusion. The temperature of the front section of the control screw is 120 °C, the temperature of the rear part of the screw is gradually increased to 200 °C, and the foaming is extruded as soon as possible, so that the material does not stay in the high temperature zone for too long.

Example 3:

70 kg of corn starch was first added to 20 kg of water, then 20 kg of polystyrene, 5 kg of sorbitol, 2 kg of stearic acid, 1 kg of aluminate coupling agent, 1 kg of sodium benzoate, 1 kg of polyethylene wax to In a high-speed mixer, stir at 60~140 °C for 3~30min, mix evenly, cool down and discharge. The above materials were placed in a twin-screw extruder and extruded at 90 to 200 ° C for extrusion. Control the temperature of the front part of the screw at 100 °C, the temperature of the rear part of the screw gradually rises to 160 °C, and extrude the foam as soon as possible. The material stays in the high temperature zone for too long.

Example 4:

60 kg of corn starch was first added to 20 kg of water, then 30 kg of polyethylene, 5 kg of maltitol, 2 kg of barium stearate, 1 kg of ethylene-acrylic acid copolymer, 1 kg of 4 碳酸 carbonate, 1 kg of polyethylene wax were added. In a high-speed mixer, stir at 60~140 °C for 3~30min, mix evenly, cool down and discharge. The above materials were added to a twin-screw extruder and extruded at 90 to 200 ° C for extrusion. The temperature of the front part of the control screw is 110 °C, the temperature of the rear part of the screw is gradually increased to 180 °C, and it is extruded as soon as possible, so that the material does not stay in the high temperature area for too long.

Example 5

Add 70kg of bamboo powder to 15kg of water, then add 20kg of polypropylene, 5kg of diethylene glycol, 2kg of stearic acid, 1kg of aluminate coupling agent, 1kg of talc, lkg of poly Propylene wax to high-speed mixer, stir at 60~140 °C for 3~30min, mix evenly, cool down and discharge. The above materials were placed in a twin-screw extruder and extruded at 90 to 200 ° C for extrusion. The temperature of the front section of the control screw is at 100 °C, the temperature of the rear part of the screw is gradually raised to 190 °C, and the foaming is extruded as soon as possible, so that the material stays in the high temperature zone for too long.

Example 6:

Add 70kg of cotton wool powder to 15kg of water, then add 20kg of polystyrene, 5kg of polyethylene glycol, 2kg of barium stearate, 1kg of ethylene-acrylic acid copolymer, lkg of talcum powder, lkg The polypropylene wax is mixed into a high-speed mixer, stirred at 60 to 140 ° C for 3 to 30 minutes, mixed evenly, and cooled to discharge. The above materials were placed in a twin-screw extruder and extruded at 90 to 200 ° C for extrusion. The temperature of the front section of the control screw is at 90 °C, the temperature of the rear part of the screw is gradually increased to 160 °C, and the foaming is extruded as soon as possible, so that the material does not stay in the high temperature zone for too long. Add 60kg of cotton wool powder to 10kg of water, then add 30kg of polyethylene, 5kg of glycerin, 2kg of dibutyltin dilaurate, 1kg of ethylene-vinyl acetate copolymer, 1kg of white carbon black, 1kg of The liquid paraffin is mixed into a high-speed mixer, stirred at 60~140 °C for 3~30min, mixed evenly, and cooled and discharged. The above materials were placed in a twin-screw extruder and extruded at 90 to 200 °C. The temperature of the front part of the control screw is at 90 °C, the temperature of the rear part of the screw is gradually increased to 140 °C, and the foaming is extruded as soon as possible, so that the material does not stay in the high temperature zone for too long.

Example 8

The wood powder with a wet weight of 80 kg was first added to 24 kg of water, then 20 kg of polypropylene, 5 kg of xylitol, 2 kg of di-n-octyltin dilaurate, 1 kg of ethylene-vinyl acetate copolymer, 1 kg of white carbon black, 1kg of liquid paraffin into a high-speed mixer, stir at 3~301^11 at 60~140°, mix evenly, cool down and discharge. The above materials were placed in a twin-screw extruder and extruded at 90 to 200 °C. The temperature of the front section of the control screw is 120 °C, the temperature of the rear part of the screw is gradually increased to 200 °C, and the foaming is extruded as soon as possible, so that the material does not stay in the high temperature zone for too long.

Example 9

Add 50kg of wood powder to 24kg of water, then add 20kg of polyethylene, 5kg of urea, 2kg of calcium compound stabilizer, 1kg of silane coupling agent, 1kg of talc, lkg of liquid paraffin, according to The mixture is added to a high-speed mixer, stirred at 60 ~ 140 ° C for 3 ~ 30min, mixed and hooked, cooled and discharged. The above materials were placed in a twin-screw extruder and extruded at 90 to 200 ° C for foaming. The temperature of the front part of the control screw is at 100 °C, the temperature of the rear part of the screw is gradually increased to 200 °C, and it is extruded as quickly as possible, so that the material does not stay in the high temperature area for too long.

Example 10: 20kg of corn starch, 20kg of wood flour, 20kg of cotton wool powder are mixed uniformly, then 20kg of water is added first, then 10kg of polyethylene, polystyrene and polypropylene are added, then 2kg of ethylene glycol and 2kg of sorbitol are added. 1kg xylitol, 1kg of stearic acid 4丐, 0.5kg of barium stearate, 0.5kg of dibutyltin dilaurate, 0.5kg of silane coupling agent, 0.5kg of ethylene-vinyl acetate copolymer, 0.5kg of carbonic acid 4丐, 0.5kg sodium benzoate, 0.5kg of ethylene bis stearamide, 0.5kg of polypropylene wax into a high-speed mixer, stir at 60~140 °C for 3~30min, mix evenly, cool down and discharge. The above materials were placed in a twin-screw extruder and extruded at 90 to 200 ° C for extrusion. The temperature of the front section of the control screw is 120 °C, the temperature of the rear part of the screw is gradually increased to 200 °C, and the foaming is extruded as soon as possible, so that the residence time of the material in the high temperature zone is not too long.

Claims

Claim

1. A biomass material foaming plastic using water as a foaming agent, which is prepared from the raw materials of the following components in parts by weight: 50 to 80 parts of renewable biomass material, 5 to 25 water, 5 to 40 parts of polyolefin, 3 to 10 parts of plasticizer, 0 to 5 parts of heat stabilizer, 0.5 to 5 parts of compatibilizer, 0 to 3 parts of nucleating agent, 0 to 3 parts of lubrication Agent.

2. A foaming material for biomass material using water as a foaming agent according to claim 1, which is prepared from the raw materials of the following components in parts by weight: 60 parts of renewable biomass raw materials, 20 water, 10 parts of polyolefin, 5 parts of plasticizer, 2 parts of heat stabilizer, 1 part of compatibilizer, 1 part of nucleating agent, 1 part of lubricant.

The foaming material of biomass material with water as a foaming agent according to claim 1 or 2, wherein the renewable biomass material is one of starch, cellulose, lignin or A variety.

The foaming plastic material of biomass material with water as a foaming agent according to claim 1 or 2, wherein the polyolefin is one or more of polyethylene, polystyrene and polypropylene. .

The foaming plastic material of biomass material using water as a foaming agent according to claim 1 or 2, wherein the plasticizer is glycerin, ethylene glycol, sorbitol, xylitol, maltitol One or more of diethylene glycol, polyethylene glycol or urea;

The foaming plastic material of biomass material with water as a foaming agent according to claim 1 or 2, wherein the heat stabilizer is 4丐 stearic acid, stearic acid, and barium stearate. One or more of dibutyltin dilaurate or di-n-octyltin dilaurate.

7. A foaming material for biomass material using water as a foaming agent according to claim 1 or 2. The compatibilizer is one or more of a silane coupling agent, an aluminate coupling agent, an ethylene-vinyl acetate copolymer or an ethylene-acrylic acid copolymer.

The foaming plastic material of biomass material with water as a foaming agent according to claim 1 or 2, wherein the nucleating agent is sodium benzoate, carbonic acid 4 bow, talc powder, white carbon black One or more.

The foaming plastic material of biomass material with water as a foaming agent according to claim 1 or 2, wherein the lubricant is ethylene bis stearamide, polyethylene wax, oxidized polyethylene wax, One or more of stearic acid 4 bow, polypropylene wax or liquid paraffin.

10. A method of preparing a foamed plastic material of biomass material using water as a foaming agent, comprising the steps of:

1) Renewable biomass material with a weight ratio of 50 to 80 parts, 5 to 30 water, 5 to 40 parts of polyolefin, 3 to 10 parts of plasticizer, 0 to 5 parts of heat stabilizer, 0.5 ~ 5 parts of compatibilizer, 0 ~ 3 parts of nucleating agent, 0 ~ 3 parts of lubricant are added to the high-speed mixer according to the ratio, stirred at 60 ~ 150 °C for 3 ~ 30min, mixed evenly, cool down Material

2) Add the above-mentioned mixed materials to a common screw extruder, extrude and foam at 90 ~ 200 °C, control the front part of the screw at a lower temperature, the latter part of the temperature is higher and extrude as soon as possible, the material After being extruded, the pressure suddenly drops to normal pressure, and the moisture in the material suddenly expands to cause foaming of the material, and the material of the present invention is obtained after cooling.