CN1238412C - Totally degradable foam buffer packaging material and its manufacturing method - Google Patents
Totally degradable foam buffer packaging material and its manufacturing method Download PDFInfo
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- CN1238412C CN1238412C CN 200310110045 CN200310110045A CN1238412C CN 1238412 C CN1238412 C CN 1238412C CN 200310110045 CN200310110045 CN 200310110045 CN 200310110045 A CN200310110045 A CN 200310110045A CN 1238412 C CN1238412 C CN 1238412C
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Abstract
The present invention relates to a foam cushioning packaging material which is full biodegradable, and a preparation method thereof. The present invention is mainly used for solving white pollution caused by the vast use of foam polystyrene. The present invention is characterized by using amylum which is more than 80% as a base material, by using superfine polyvinyl alcohol as a film-forming reinforcing agent, by using water as a foaming agent, and by additionally using a nucleating agent and a flow modifier to form the foam cushioning packaging material. After the mixture is mixed by a blending homogenizer, the mixture is delivered to an equidirectional double-screw extruder of which the length-diameter ratio is 44. Under the condition that the rotate speed of screws is from 150 to 400 rpm, products are molded through one-time extrusion. The product is suitable for substituting foamed polystyrene which has no shape requirements and is used for filling.
Description
Technical field
The present invention relates to a kind of amortizing packaging material and manufacture method thereof of fully biodegradable.
Background technology
In recent years, along with the growing interest of people to the resource and environment problem, produce complete biodegradable buffering package goods with renewable resources, can under state of nature, be microbiological degradation Cheng Shui and carbonic acid gas after using, in being studied thing, starch is with its wide material sources, and is cheap and become global research and development focus.
At first people's developing focus is with Griflin, C.J.L. (Adv, Chem, Ser, 134 (1974) 159-170) technology is the biological disintegration plastics of thermoplastics/starch mix type of core, because in this series products only is that starch is biodegradable, and other thermoplastic resin is still not biodegradable, this class material still works the mischief to environment.
1989, people such as N.Cacourse lead first to file first piece (USpatent 4863655 after preparing biodegradable foam wrapping material patent with high amylose starch, 1989) be that (US5043196 appears in the research of substrate preparation biodegradation cushioning packing material in a large number, with high straight chain and modified starch; US6107371).2002, J.Willett (Polymer (43) 2002 5935-5947) on the polymkeric substance magazine delivered review article, has concluded the characteristic of various foaming systems.Based on this class technology, national of the United States's starch company has developed the loose fill supply the market of Eco-form series.This material has use properties and fully biodegradable preferably, but because what use is that higher high straight chain of price and modified starch are raw material, and (as EPS) compares with general-purpose plastics, the market value that this material is higher has limited it and used widely.
Use the lower low straight chain content ecosystem starch of price to prepare biodegradable amortizing packaging material, can effectively reduce the goods cost, but because amylose starch is different with the crystal property of amylopectin, therefore compare with the Eco-form series product, biodegradable amortizing packaging material with low straight chain content ecosystem starch preparation is hard and crisp, performance is easily affected by environment, can't realize widespread use.Chinese patent CN1361048A; CN1052187C has the shape amortizing packaging material by compression molding production, owing to can't realize the continuity industrialized production, and do not solve above-mentioned technical barrier, and therefore also can't produce the suitable product of cost performance and general-purpose plastics.
Summary of the invention
The foam amortizing packaging material that the purpose of this invention is to provide a kind of fully biodegradable;
Another object of the present invention provides a kind of manufacture method of foam amortizing packaging material of fully biodegradable.
Starch is to use as base material among the present invention, and 1. its effect has the mixture of reduction cost, 2. is the biological degradability that guarantees base material, but pure starchbased product intensity difference, moral character is crisp, can't prepare high quality material.Add polyvinyl alcohol in starch based material, can improve foamy improved strength fragility, because polyvinyl alcohol has biological degradability, therefore this interpolation does not influence the system biodegradability.Behind the polyvinyl alcohol super-refinement, be more conducive to following process.Oligoamide have three greatly the effect.(1) consistency of raising starch and polyvinyl alcohol.(2) reduce foam unit weight, improve foaming properties.(3) improve the system processing characteristics, enlarge process window; Compare with independent use, the composite use of inorganic, organic nucleating agent not only can be played better nucleating effect, and can significantly improve the toughness and the attached water of end article.Water is to use separately as unique whipping agent among the present invention, and this not only can make the stability of the course of processing be improved, and, reduced production cost.
Complete biodegradable amortizing packaging material of the present invention is formed: the starch of 80-90.2%, the polyvinyl alcohol of 1-7.4%, the low-molecular-weight polyamide resin of 1-3.2%, the 1-1.3% inorganic nucleator, 1.2-1.5% fiber-like nucleator, surplus whipping agent are water, and wherein used starch is W-Gum, potato starch, wheat starch or tapioca (flour), its particle diameter is between the 80-300 order, and best particle size range is between the 150-300 order; Used polyvinyl alcohol is the micronized polyethylene alcohol of complete hydrolysis, and its particle diameter should be greater than 20 orders, and its range of viscosities is 0.005-0.065Pa.s/20 ℃, and best viscosity is 0.025-0.065Pa.s/20 ℃; Low molecular polyamides is made by gelled acid and the polycondensation of many ammoniums of polyalkenes, wherein gelled acid is linoleic acid dimer or eleostearic acid dimer, the many ammoniums of polyalkenes are diethylenetriamine or triethylene tetramine, its range of viscosities is 50-500mPa.s/25 ℃, and best range of viscosities is 150-500mPa.s; Inorganic nucleator is that lime carbonate, silicon-dioxide are or/and talcum powder; The fiber-like nucleator is that glass fibre, straw fiber, xylon are or/and the auxiliary nucleator of cotton fibre conduct; Whipping agent is a water;
Preparation technology is as follows: at first each component is measured separately by the prescription requirement and is placed the high-speed mixing clarifixator to mix, the airtight ageing of said composition is 24 hours then, by the length-to-diameter ratio with eight sections heating is that 44: 1 automatically cleaning twin screw is extruded, this moment, the speed range of forcing machine was in the 150-400rpm level, cross the foam buffer product that low rotating speed is unfavorable for making the uniform in foaming excellent property, under optimum revolution 250-400rpm condition, the foam buffering package goods that make, its performance is as follows, apparent density≤47Kg/m
3, compressive strength is greater than 18kpa, and breaking load is greater than the amortizing packaging material of 5N.This material with 70 ℃ of hot-water soaks reduction in bulk in 1 minute greater than 70%.This product does not produce static, and price and EPS are similar, is to substitute to fill with amorphism requirement polystyrene foamed, solves the ideal product of white pollution.
Embodiment
Following examples are used to illustrate the present invention, but are not limited to the present invention.
Embodiment 1:
By weight percentage, get 80 parts of W-Gums (150 order), 7.4 part micronized polyethylene alcohol (viscosity 0.050Pa.s/20 ℃), 1.1 part lime carbonate, 1.2 part straw fiber and 2.9 parts of oligoamides (viscosity 500mPa.s) placed high-speed mixing material machine premix 1 minute, then 7.4 parts of water are slowly added the material system continuously, material mixed 15 minutes then, ageing is placed and is directly added length after 24 hours through heating in the automatically cleaning twin screws than eight sections that are 44: 1 in airtight bag, at rotating speed is under the 300rpm condition, makes goods.
Embodiment 2:
By weight percentage, 85.3 parts of extracting corn starch (200 order), 3.1 parts (viscosity 0.065Pa.s/20 ℃) of micronized polyethylene alcohol, 1.1 parts of talcum powder, fine 1.2 parts of grass, the working method that oligoamide 3.1 parts (viscosity 400mPa.s) press embodiment 1 makes corresponding goods behind 6.2 parts of water of adding.
Example 3:
By weight percentage, 86.6 parts of extracting corn starch (300 order), 3.2 parts (viscosity 0.025Pa.s/20 ℃) of micronized polyethylene alcohol, silica 1 .1 part, 1.2 parts in glass fibre, oligoamide 3.2 parts of (viscosity 150mPa.s) and 4.7 parts of water, ageing is placed and is directly added length after 24 hours through heating in the automatically cleaning twin screws than eight sections that are 44: 1 in airtight bag, at rotating speed is under the 150rpm condition, makes goods.
Embodiment 4:
By weight percentage, 87.2 parts of extracting corn starch (300 order), 4 parts (viscosity 0.005Pa.s/20 ℃) of micronized polyethylene alcohol, 1.2 part cotton fibre, 1 part of talcum powder, 1.2 parts of oligoamides (viscosity 500mPa.s) and 5.4 parts of water, ageing is placed and is directly added length after 24 hours through heating in the automatically cleaning twin screws than eight sections that are 44: 1 in airtight bag, at rotating speed is under the 350rpm condition, makes goods.
Embodiment 5:
By weight percentage, 90.2 parts of extracting corn starch (150 order), 1 part (viscosity 0.050Pa.s/20 ℃) of micronized polyethylene alcohol, 1.3 part xylon, 1 part of talcum powder and 1.3 parts of oligoamides (viscosity 50mPa.s) and 5.2 parts of water, ageing is placed and is directly added long after 24 hours to be under the 250rpm condition through than being in eight sections heating automatically cleaning twin screws of 44: 1 at rotating speed, to make goods in airtight bag.
Embodiment 6:
By weight percentage, get 80 parts of W-Gums (80 order), 7.4 part micronized polyethylene alcohol (viscosity 0.050Pa.s/20 ℃), 1 part of lime carbonate, 1.3 part straw fiber and 2.9 parts of oligoamides (viscosity 200mPa.s) placed high-speed mixing material machine premix 1 minute, then 7.4 parts of water are slowly added the material system continuously, material mixed 15 minutes then, ageing is placed and is directly added length after 24 hours through heating in the automatically cleaning twin screws than eight sections that are 44: 1 in airtight bag, at rotating speed is under the 400rpm condition, makes goods.
Embodiment 7:
By weight percentage, 84 parts of the beans starch that fetches earth (100 order), 4.4 parts (viscosity 0.065Pa.s/20 ℃) of micronized polyethylene alcohol, 1.1 parts of talcum powder, fine 1.2 parts of grass, the working method that oligoamide 3.1 parts (viscosity 400mPa.s) is pressed embodiment 1, after adding 6.2 parts of water, make corresponding goods.
Example 8:
By weight percentage, 87 parts of beans starch (150 order) fetch earth, 3.8 parts (viscosity 0.025Pa.s/20 ℃) of micronized polyethylene alcohol, silica 1 .3 part, 1.2 parts in glass fibre, oligoamide 3 parts of (viscosity 350mPa.s) and 4.7 parts of water, ageing is placed and is directly added length after 24 hours through heating in the automatically cleaning twin screws than eight sections that are 44: 1 in airtight bag, at rotating speed is under the 350rpm condition, makes goods.
Embodiment 9:
By weight percentage, 88.2 parts of beans starch (80 order) fetch earth, 2.6 parts (viscosity 0.005Pa.s/20 ℃) of micronized polyethylene alcohol, 1.5 part cotton fibre, 1 part of talcum powder, 1.3 parts of oligoamides (viscosity 500mPa.s) and 5.4 parts of water, ageing is placed and is directly added length after 24 hours through heating in the automatically cleaning twin screws than eight sections that are 44: 1 in airtight bag, at rotating speed is under the 250rpm condition, makes goods.
Embodiment 10:
By weight percentage, 90.2 parts of beans starch (200 order) fetch earth, 1 part (viscosity 0.050Pa.s/20 ℃) of micronized polyethylene alcohol, 1.2 part xylon, 1 part of talcum powder and 1.3 parts of oligoamides (viscosity 50mPa.s) and 5.3 parts of water, ageing is placed and is directly added long after 24 hours to be under the 250rpm condition through than being in eight sections heating automatically cleaning twin screws of 44: 1 at rotating speed, to make goods in airtight bag.
Embodiment 11:
By weight percentage, get 80 portions of wheat starches (80 order), 7.4 parts of micronized polyethylene alcohol (viscosity 0.035Pa.s/20 ℃), 1.1 part lime carbonate, 1.2 part straw fiber and 2.9 parts of oligoamides (viscosity 300mPa.s), placed high-speed mixing material machine premix 1 minute, then 7.4 parts of water are slowly added the material system continuously, material mixed 15 minutes then, ageing is placed and is directly added length after 24 hours through heating in the automatically cleaning twin screws than eight sections that are 44: 1 in airtight bag, at rotating speed is under the 400rpm condition, makes goods.
Embodiment 12:
By weight percentage, get 85 parts of wheat starches (100 order), 5 parts (viscosity 0.065Pa.s/20 ℃) of micronized polyethylene alcohol, 1.3 parts of talcum powder, fine 1.5 parts of grass, the working method that oligoamide 1 part (viscosity 400mPa.s) press embodiment 1 makes corresponding goods behind 6.2 parts of water of adding.
Embodiment 13:
By weight percentage, get 87 parts of wheat starches (150 order), 3.8 parts (viscosity 0.025Pa.s/20 ℃) of micronized polyethylene alcohol, silica 1 part, 1.2 parts in glass fibre, oligoamide 3.2 parts of (viscosity 150mPa.s) and 3.8 parts of water, ageing is placed and is directly added length after 24 hours through heating in the automatically cleaning twin screws than eight sections that are 44: 1 in airtight bag, at rotating speed is under the 150rpm condition, makes goods.
Embodiment 14:
By weight percentage, get 88.2 parts of wheat starches (80 order), 2.6 parts (viscosity 0.065Pa.s/20 ℃) of micronized polyethylene alcohol, 1.4 part cotton fibre, 1.1 part talcum powder, 1.3 parts of oligoamides (viscosity 350mPa.s) and 5.4 parts of water, the ageing placement directly adds long through heating in the automatically cleaning twin screws than eight sections that are 44: 1 after 24 hours in airtight bag, at rotating speed is under the 350rpm condition, makes goods.
Embodiment 15:
By weight percentage, get 90.2 parts of wheat starches (150 order), 1 part (viscosity 0.050Pa.s/20 ℃) of micronized polyethylene alcohol, 1.4 part straw fiber, 1 part of talcum powder and 2 parts of oligoamides (viscosity 50mPa.s) and 4.4 parts of water, ageing is placed and is directly added long after 24 hours to be under the 250rpm condition through than being in eight sections heating automatically cleaning twin screws of 44: 1 at rotating speed, to make goods in airtight bag.
Embodiment 16:
By weight percentage, get 82 parts of tapioca (flour)s (150 order), 7 parts (viscosity 0.065Pa.s/20 ℃) of micronized polyethylene alcohol, silica 1 .3 part, 1.4 parts of straw fibers, oligoamide 3.2 parts of (viscosity 150mPa.s) and 5.1 parts of water, ageing is placed and is directly added length after 24 hours through heating in the automatically cleaning twin screws than eight sections that are 44: 1 in airtight bag, at rotating speed is under the 150rpm condition, makes goods.
Embodiment 17:
By weight percentage, get 89 parts of tapioca (flour)s (250 order), 3 parts (viscosity 0.065Pa.s/20 ℃) of micronized polyethylene alcohol, 1.4 part cotton fibre, 1.1 part talcum powder, 1.3 parts of oligoamides (viscosity 500mPa.s) and 4.2 parts of water, the ageing placement directly adds long through heating in the automatically cleaning twin screws than eight sections that are 44: 1 after 24 hours in airtight bag, at rotating speed is under the 400rpm condition, makes goods.
Embodiment 18:
By weight percentage, get 90 parts of tapioca (flour)s (80 order), 1 part (viscosity 0.050Pa.s/20 ℃) of micronized polyethylene alcohol, 1.5 part straw fiber, 1 part of talcum powder and 2.1 parts of oligoamides (viscosity 50mPa.s) and 4.4 parts of water, ageing is placed and is directly added long after 24 hours to be under the 300rpm condition through than being in eight sections heating automatically cleaning twin screws of 44: 1 at rotating speed, to make goods in airtight bag.
Claims (7)
1, a kind of foam amortizing packaging material of fully biodegradable, be that following each component is at first mixed through the high-speed mixing clarifixator, airtight ageing is after 24 hours, by having eight sections heating length-to-diameter ratios is 44: 1 automatically cleaning twin screw extruder, control speed range 150-400rpm extrudes and makes, the described weight percent of respectively forming is: the starch of 80-90.2%, the polyvinyl alcohol of 1-7.4%, the low-molecular-weight polyamide resin of 1-3.2%, the 1-1.3% inorganic nucleator, the whipping agent water of 1.2-1.5% fiber-like nucleator and surplus, wherein used starch are W-Gum, potato starch, wheat starch or tapioca (flour), particle diameter is between the 80-300 order, used polyvinyl alcohol is the micronized polyethylene alcohol of complete hydrolysis, and particle diameter is greater than 20 orders, and range of viscosities is 0.005-0.065Pa.s/20 ℃;
Low-molecular-weight polyamide resin, range of viscosities are 50-500mPa.s/25 ℃.
2, fully biodegradable foam amortizing packaging material as claimed in claim 1 is characterized in that described low molecular polyamides makes by gelled acid and the polycondensation of many ammoniums of polyalkenes.
3, fully biodegradable foam amortizing packaging material as claimed in claim 2 is characterized in that described gelled acid is linoleic acid dimer or eleostearic acid dimer.
4, fully biodegradable foam amortizing packaging material as claimed in claim 2 is characterized in that the many ammoniums of described polyalkenes are diethylenetriamine or triethylene tetramine.
5, fully biodegradable foam amortizing packaging material as claimed in claim 1 is characterized in that described inorganic nucleator is that lime carbonate, silicon-dioxide are or/and talcum powder; The fiber-like nucleator is that glass fibre, straw fiber, xylon are or/and cotton fibre.
6, a kind of preparation method of foam amortizing packaging material of fully biodegradable, raw material is formed: the starch of 80-90.2%, the polyvinyl alcohol of 1-7.4%, the low-molecular-weight polyamide resin of 1-3.2%, the 1-1.3% inorganic nucleator, 1.2-1.5% fiber-like nucleator, whipping agent, wherein used starch are W-Gum, potato starch, wheat starch or tapioca (flour), particle diameter is between the 80-600 order, used polyvinyl alcohol is the micronized polyethylene alcohol of complete hydrolysis, particle diameter is greater than 20 orders, and range of viscosities is 0.005-0.065Pa.s/20 ℃, low-molecular-weight polyamide resin, range of viscosities is 50-500mPa.s/25 ℃, and whipping agent is a water; Each component is at first mixed through mixed clarifixator at a high speed, and airtight ageing is after 24 hours, is 44: 1 automatically cleaning twin screw extruder by having eight sections heating major diameters, and control speed range 150-400rpm extrudes.
7. the manufacture method of fully biodegradable foam amortizing packaging material as claimed in claim 6 is characterized in that described automatically cleaning twin screw extruder control optimum revolution scope is 250-400rpm.
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| CN 200310110045 CN1238412C (en) | 2003-11-17 | 2003-11-17 | Totally degradable foam buffer packaging material and its manufacturing method |
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| CN 200310110045 CN1238412C (en) | 2003-11-17 | 2003-11-17 | Totally degradable foam buffer packaging material and its manufacturing method |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101475709B (en) * | 2008-01-04 | 2012-03-21 | 财团法人工业技术研究院 | Preparation of starch foaming body |
| CN101519503A (en) * | 2009-04-03 | 2009-09-02 | 武汉华丽生物材料有限公司 | Biomass material foamed plastic taking water as foaming agent and preparation method thereof |
| CA2670216A1 (en) * | 2009-06-22 | 2010-12-22 | Carlo Fascio | Biodegradable packaging of starch and fiber made by extrusion |
| CN107053796A (en) * | 2009-07-10 | 2017-08-18 | 康宁股份有限公司 | Thin polymer film for protective glass plate |
| CN105968547A (en) * | 2016-05-19 | 2016-09-28 | 苏州倍力特物流设备有限公司 | Cushion packaging material and preparation method thereof |
| CN108341994B (en) * | 2018-02-12 | 2020-12-22 | 华南理工大学 | Starch-based foaming material and preparation method thereof |
| CN110408225A (en) * | 2019-06-21 | 2019-11-05 | 涂民强 | A kind of preparation method of composite plant fiber buffer packaging material |
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