CN1046746C - Biologically decomposable synthetic material for producing plastic packing and its production process - Google Patents
Biologically decomposable synthetic material for producing plastic packing and its production process Download PDFInfo
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- CN1046746C CN1046746C CN 97125612 CN97125612A CN1046746C CN 1046746 C CN1046746 C CN 1046746C CN 97125612 CN97125612 CN 97125612 CN 97125612 A CN97125612 A CN 97125612A CN 1046746 C CN1046746 C CN 1046746C
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- starch
- fatty acid
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- synthetic material
- resin
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- Biological Depolymerization Polymers (AREA)
Abstract
The present invention relates to a biologically decomposable synthetic material for manufacturing plastic packaging objects. The raw material in the present invention has the following weight ratio of 100 of starch, 5 to 15 of fatty acid ester, 0.5 to 1 of unsaturated fatty acid and 80 to 90 of polyvinyl resin or polyvinyl chloride resin, wherein the water content of the starch is higher than 1%, and the starch is dried by calcium oxide. If the present invention uses cassava starch and polystyrene resin, the raw material has the following weight ratio of 100 of cassava starch, 8 to 10 of fatty acid ester, 0.8 to 1.2 of unsaturated fatty acid and 800 to 1000 of polystyrene resin. The manufacturing process of the plastic packaging objects is composed of the procedures of mixing, rolling, cooling and cutting. The biologically decomposable synthetic material has the characteristics of degradation and physicochemical properties of plastic, and the products are decomposable, and are favorable for environmental protection. The present invention has a simple manufacturing method.
Description
The present invention relates to make the technical formula and the manufacture method thereof of degradative plastics packing material.
At present, how widely used plastic goods packing (box, shell) on the market is that raw material is made with polyethylene, polypropylene, polyvinyl chloride, polystyrene plastic resin.Some advantage of these packing material tools is as intensity height, attractive in appearance, damp proof protection against the tide etc.Simultaneously a fatal shortcoming is arranged also: the plastic packing article after the use is abandoned in the shop or the roadside, causes white pollution and a century not mashed, leaves endless troubles.
The objective of the invention is, provide a kind of in order to make the biodegradable synthetic materials and the manufacture method thereof of package resin thing.
The present invention realizes by following technical solution:
In order to make the biodegradable synthetic materials of plastic packing article (bag, box, shell), has biodegradable.So-called biological degradability is at living microorganism, as: under the effect of bacterium, fungi and enzyme, it is all decomposed destroy and become the mesosome of microbial metabolism.This biodegradable synthetic materials that is present in the plastic packing article under the environment that microorganism exists, (is imbedded or is partly imbedded in the soil) when especially contacting with soil, and biological degradation will take place.For whole plastic packing article, initial surface degraded and filtering, then inside begins degraded, forms vesicular structure.This vesicular structure is easily oxidized, lytic enzyme becomes, or decomposes under above-mentioned multiple factor effect.The method that Here it is effectively degrades to the plastics macromole that is made of carbon and carbon connection chain.
The present invention is in order to make the biodegradable synthetic materials of plastic packing article, and selecting plastics (polyethylene, polyvinyl chloride, polypropylene, polystyrene) resin, starch (or lactose), fatty acid ester, unsaturated fatty acids is raw material.Higher as used starch water content, also to add an amount of siccative (calcium sulfate, calcium oxide etc.), this synthetic materials is compatible on physical chemistry.
Starch is compound of polysaccharide, generates sugar through hydrolysis.Starch has thermostability with relative controlled water-soluble under state of nature.Under wet condition, help biological degradation.Starch has adsorptivity, fatty acid ester, unsaturated fatty acids etc. can be adsorbed on its molecular surface.
Fatty acid ester, unsaturated fatty acids can be attracted to the starch molecule surface, and the energy autoxidation produces hydrogen peroxide or superoxide in physical environment.This is to contain one or several pair key because insatiable hunger is closed in the alkyl of lipid acid, as oleic acid is exactly.This oxide compound can block the carbochain of plastic molecules.This autoxidation is by metallic iron catalysis.Metallic iron can be added in the synthetic materials, also can be by the trace iron in the soil.
One, technical formula
Material name and weight ratio therebetween:
Starch 100
Fatty acid ester 5～15
Unsaturated fatty acids 0.5～1
Polyvinyl resin or polyvinyl chloride (PVC) RESINS 80～90
Has a two key in the alkyl of unsaturated fatty acids at least.Used Plastic Resin also can be polypropylene etc.If used starch water content greater than 1%, then should add fatty acid esters and insatiable hunger and close the siccative of fatty acid wt 2% (calcium oxide, calcium sulfate etc.).
Starch can be used corn, rice, tapioca (flour) or lactose.The mixing starch that the most handy corn, rice are made.
If in technical formula, adopt tapioca (flour) and polystyrene resin, then weight ratio therebetween should be:
Tapioca (flour) (moisture 2%) 100
Fatty acid ester 8～10
Unsaturated fatty acids 0.8～1.2
Polystyrene resin 800～1000
Calcium oxide 0.176～0.224
Two, manufacture method
Manufacture method is formed by mixing, roll, cool off, cut four procedures:
Mix, material is pressed the accurate weighing of technical formula, use the mixer uniform mixing.
Roll, the material that mixes is put into rolling machine, under 140～150 ℃ of temperature, rolled 8～10 minutes, extrude the thick slab of 2～4mm by rolling machine then.
Cooling will be cooled to normal temperature by the material that rolling machine extrudes, and will be stand-by.
Cutting is cut into particle with the refrigerative material with cutting machine.In order to and Plastic Resin, make corresponding plastic packing article by technology separately.
The synthetic materials that the present invention is biodegradable has the palpability degradability, has the physico-chemical property of plastics simultaneously.Raw materials used inexpensively easily purchase.With the plastic packing article of its production, can decompose disappearance, environmental.Its simpler is easy to grasp.
Embodiment 1: the synthetics of being made up of polyolefin resin, starch, fatty acid ester and lipid acid.
With the dry humidity of crossing in advance is 0.6% W-Gum 200 grams, ethyl olein 30 grams, and the low-gravity ethene of oleic acid 1 gram and 160 grams mix mutually, and squeeze film density is 0.920, and melt-flow index is 1.Mixed material rolled 10 minutes in two roller rolling machines, and temperature is 140 ℃.At last, a kind of white, slick synthetics extrudes from rolling machine.Hide is about 3 mm thick.After the cooling, be cut into particle with cutting machine.This synthetic materials as with proportion be 0.916, melt-flow index is 1 low-gravity polyethylene phase raw materials mixed, makes that the shared ratio of starch is 8% in final synthetic materials.
Raw material is mixed the simple helix extrusion machine that the back feeds 45 millimeters with filled polymer, compression ratio is 2.5: 1, L: the D ratio is 20: 1, when final die temperature is 175 ℃, with blown film stretcher and conventional mould blown film.This product is translucent fexible film.With the same polymkeric substance that does not contain starch and other material composition, compare with the product of same device fabrication: its junk shock strength is 265 grams, and forward tensile strength is 8.28MN/m
2, transverse tensile strength is 5.52MN/m
2, forward tear strength is 2.07MN/m
2, horizontal and tear strength is 1.73MN/m
2
Embodiment 2: the synthetic materials that contains polystyrene thermoplastic resin, starch fat and lipid acid.
With pre-dried 200 tapioca (flour)s of 300 grams, 300 gram granules of polystyrene, the medicinal alkyl olein of 30 grams mixes mutually with the pure oleic acid of 3 grams, in mixing tank, add thermal synthesis then, through 6 minutes add thermal synthesis after, material is poured in the two roller rolling machines that are preheated to 150 ℃, form the plastic board base, be cut into particulate state after waiting to lower the temperature, feed the simple helix forcing machine again, C: the D ratio is 25: 1, and the diameter of spiral propeller is 45 millimeters, for intravital ventilation of tube and volatilization, adopt two-stage sectional spiral propeller.The extrusion material of outlet of extruder enters mould, forms 0.7 mm thick, the film of 250 mm wides, and this film smooth surface is applicable to the thermoforming process.For example produce thin-walled package material or disposable water cup etc.
Claims (1)
1, a kind of biodegradable polystyrene material, it is characterized in that described material can be prepared from as follows: at first that starch is predrying, then with the above-mentioned starch of 300 grams, 300 gram granules of polystyrene, 30 gram ethyl oleins and 3 gram oleic acid uniform mixing, with mixed material Hybrid Heating 6 minutes in mixing tank, the material of Hybrid Heating is being preheated to two rod rolling machines formation slabs of 150 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97125612 CN1046746C (en) | 1997-12-24 | 1997-12-24 | Biologically decomposable synthetic material for producing plastic packing and its production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97125612 CN1046746C (en) | 1997-12-24 | 1997-12-24 | Biologically decomposable synthetic material for producing plastic packing and its production process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1184126A CN1184126A (en) | 1998-06-10 |
| CN1046746C true CN1046746C (en) | 1999-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97125612 Expired - Fee Related CN1046746C (en) | 1997-12-24 | 1997-12-24 | Biologically decomposable synthetic material for producing plastic packing and its production process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1046746C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7390841B2 (en) * | 2005-01-24 | 2008-06-24 | Biotech Products, Llc | Compostable vinyl halide polymer compositions and composite sheets |
| CN102019697B (en) * | 2010-10-11 | 2012-04-18 | 内蒙古大学 | Method for preparing light thermal insulation board by taking oxidized starch as binder |
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1997
- 1997-12-24 CN CN 97125612 patent/CN1046746C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1184126A (en) | 1998-06-10 |
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| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: PATENTEE; FROM: HUANG FA TO: LI GUIFANG |
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| CP03 | Change of name, title or address |
Address after: 115003, No. ten, Nanping lane, Nantong street, West downtown, Liaoning, Yingkou Patentee after: Li Guifang Address before: Zhonghe City, Taiwan, Taipei Patentee before: Huang Fa |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |