CN112029245A - Degradable plastic fastener and preparation method thereof - Google Patents
Degradable plastic fastener and preparation method thereof Download PDFInfo
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- CN112029245A CN112029245A CN202010985490.0A CN202010985490A CN112029245A CN 112029245 A CN112029245 A CN 112029245A CN 202010985490 A CN202010985490 A CN 202010985490A CN 112029245 A CN112029245 A CN 112029245A
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- degradable plastic
- mixture
- fastener
- plastic fastener
- starch
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- 229920006238 degradable plastic Polymers 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 20
- 229920002472 Starch Polymers 0.000 claims abstract description 16
- 229920000747 poly(lactic acid) Polymers 0.000 claims abstract description 16
- 239000004626 polylactic acid Substances 0.000 claims abstract description 16
- 239000008107 starch Substances 0.000 claims abstract description 16
- 235000019698 starch Nutrition 0.000 claims abstract description 16
- 239000012745 toughening agent Substances 0.000 claims abstract description 16
- 238000002156 mixing Methods 0.000 claims abstract description 12
- -1 polybutylene succinate Polymers 0.000 claims abstract description 10
- 239000004631 polybutylene succinate Substances 0.000 claims abstract description 10
- 229920002961 polybutylene succinate Polymers 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- ZMKVBUOZONDYBW-UHFFFAOYSA-N 1,6-dioxecane-2,5-dione Chemical compound O=C1CCC(=O)OCCCCO1 ZMKVBUOZONDYBW-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 238000000465 moulding Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 4
- KDYFGRWQOYBRFD-UHFFFAOYSA-N succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 claims description 4
- 229920002988 biodegradable polymer Polymers 0.000 claims description 2
- 239000004621 biodegradable polymer Substances 0.000 claims description 2
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical compound CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000001384 succinic acid Substances 0.000 claims description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 8
- 239000001569 carbon dioxide Substances 0.000 abstract description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 102000004190 Enzymes Human genes 0.000 abstract description 3
- 108090000790 Enzymes Proteins 0.000 abstract description 3
- 241001465754 Metazoa Species 0.000 abstract description 3
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 abstract description 3
- 244000005700 microbiome Species 0.000 abstract description 3
- 239000003292 glue Substances 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- 229920000704 biodegradable plastic Polymers 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 239000011259 mixed solution Substances 0.000 description 5
- 239000004597 plastic additive Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical group C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- 239000003063 flame retardant Substances 0.000 description 4
- 239000003999 initiator Substances 0.000 description 4
- 239000000178 monomer Substances 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011265 semifinished product Substances 0.000 description 4
- 239000003381 stabilizer Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 239000002562 thickening agent Substances 0.000 description 4
- 239000004677 Nylon Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 229920001778 nylon Polymers 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/06—Biodegradable
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Biological Depolymerization Polymers (AREA)
- Slide Fasteners (AREA)
Abstract
The invention discloses a degradable plastic fastener and a preparation method thereof, wherein the fastener mainly comprises the following components in percentage by mass: 60-90% of poly (butylene succinate), 5-45% of polylactic acid, 0.1-5% of starch and 0.1-2% of toughening agent. The preparation method comprises the following steps: uniformly mixing the dried polybutylene succinate, polylactic acid and starch to obtain a first mixture; adding a toughening agent into the first mixture and uniformly mixing to obtain a second mixture; heating the mixture II to a molten state; and injecting the mixture II in the molten state into a mold, pressurizing, cooling and molding to obtain the required degradable plastic fastener. The degradable plastic fastener and the preparation method thereof provided by the invention can be decomposed by various microorganisms or enzymes in animals and plants in nature and finally decomposed into carbon dioxide and water, and have good biocompatibility and bioabsorbability.
Description
Technical Field
The invention relates to the field of degradable plastics, in particular to a degradable plastic fastener and a preparation method thereof.
Background
The glue needle (nail) is divided into a nylon glue needle, a washing glue needle, a standard glue needle, an I-shaped glue needle, a question mark glue needle and the like, the main material is TPU or PP or nylon, the glue needle is widely applied to clothing factories, washing factories, toy factories and the like, and the glue needle (nail) is generally used in cooperation with a tag hanging gun or a glue needle machine to firmly connect a product tag with a product or similar packages together so as to increase the brand recognition degree of the product.
However, the rubber needle is a disposable product, which is not convenient to recycle, and the current rubber needle and rubber nail are both non-degradable plastic wastes, which causes more and more serious environmental pollution.
The invention application with the application number of 202010195373.4 discloses a degradable plastic fastening rubber needle and a preparation method thereof, wherein the degradable plastic fastening rubber needle comprises the following components in percentage by weight: 65-80% of TPU, 10-20% of styrene monomer, 0-20% of polar monomer, 2-5% of thickening agent and initiator: 0.05-0.2%, thermal-oxygen resistant stabilizer 0.1-0.5%, anaerobic biodegradable plastic additive: 0.1-3%, resin: 1-3%, flame retardant: 2 to 5 percent. The preparation method comprises the following steps: the method comprises the following steps: sieving the TPU to obtain powder of 120-140 meshes; step two: uniformly mixing a styrene monomer, a polar monomer and a thickening agent to obtain a mixed solution, and extruding to obtain a mixed solution; step three: mixing the TPU with the size of 120-140 meshes with the mixed solution, adding the initiator, the anti-thermal-oxygen stabilizer and the resin, and uniformly stirring to obtain a semi-molten solution; step four: adding a flame retardant and an anaerobic biodegradable plastic additive into the solution in a semi-molten state, and stirring to obtain a semi-finished product; step five: heating the semi-finished product at high temperature to obtain a solution in a molten state; step six: pouring the solution in a molten state into a mold; step seven: and (5) cooling and forming. Said invention utilizes the addition of anaerobic biodegradable plastic additive, after the rubber needle and rubber nail are embedded in the soil or deep sea and isolated from natural air for several days, they are gradually degraded into water and carbon dioxide, etc. so that the pollution of plastics to natural environment can be effectively reduced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a degradable plastic fastener and a preparation method thereof, the plastic fastener can be decomposed by various microorganisms or enzymes in animals and plants in nature and finally decomposed into carbon dioxide and water, and has good biocompatibility and bioabsorbability.
The technical scheme adopted by the invention for solving the technical problem is as follows: a degradable plastic fastener, which consists essentially of the following components in percentage by mass: 60-90% of poly (butylene succinate), 5-45% of polylactic acid, 0.1-5% of starch and 0.1-2% of toughening agent.
Further, the fastener mainly comprises the following components in percentage by mass: 60% of polybutylene succinate, 45% of polylactic acid, 4% of starch and 1% of toughening agent.
Further, the fastener mainly comprises the following components in percentage by mass: 70% of poly (butylene succinate), 25.5% of polylactic acid, 4% of starch and 0.5% of toughening agent.
Further, the fastener mainly comprises the following components in percentage by mass: 85% of polybutylene succinate, 10% of polylactic acid, 4% of starch and 1% of toughening agent.
Further, the polybutylene succinate is a biodegradable polymer formed by esterifying succinic acid and butanediol.
A method of making a degradable plastic fastener, the method comprising the steps of:
uniformly mixing dried polybutylene succinate, polylactic acid and starch to obtain a first mixture;
step two, adding a toughening agent into the mixture I and uniformly mixing to obtain a mixture II;
step three, heating the mixture II to a molten state;
and step four, injecting the mixture II in the molten state into a mold, pressurizing, cooling and molding to obtain the required degradable plastic fastener.
Further, in the third step, the heating temperature is 150-280 ℃.
Further, in the fourth step, the temperature of the die is 50-60 ℃, and the pressure is 60-90 MPa.
The invention has the beneficial effects that: compared with the prior art, the degradable plastic fastener provided by the invention can be decomposed by various microorganisms or enzymes in animals and plants in nature, and finally decomposed into carbon dioxide and water, and has good biocompatibility and bioabsorbability. The biodegradable plastic fastener is tested by EN13432-2000 test standard, and the biological resolvability reaches 90% in 180 days; the raw materials formed by the traditional PP/nylon/TPU/Rset/rPP can not complete biodegradation within 180 days. The degradable plastic fastener provided by the invention can be mainly applied to hanging tags, series packaging of products, washing products and the like.
Detailed Description
The invention is further illustrated by the following specific examples. These examples are intended to illustrate the invention and are not intended to limit the scope of the invention.
Example 1
A degradable plastic fastener, which consists essentially of the following components in percentage by mass: 85% of polybutylene succinate, 10% of polylactic acid, 4% of starch and 1% of toughening agent.
The preparation method of the degradable plastic fastener comprises the following steps: uniformly mixing the dried polybutylene succinate, polylactic acid and starch to obtain a first mixture; adding a toughening agent into the first mixture and uniformly mixing to obtain a second mixture; heating the mixture II to a molten state, wherein the heating temperature is 150-280 ℃; and injecting the mixture II in the molten state into a mold, pressurizing, cooling and molding to obtain the required degradable plastic fastener, wherein the temperature of the mold is 50-60 ℃, and the pressure is 70-90 MPa. The prepared fasteners are buried and tested according to EN13432-2000 inspection standard to obtain degradation data 1.
Example 2
A degradable plastic fastener, which consists essentially of the following components in percentage by mass: 85% of poly (butylene succinate), 10% of polylactic acid, 4% of starch and 1% of toughening agent
The preparation method is the same as example 1. And (4) burying the prepared fastener, and testing according to EN13432-2000 inspection standard to obtain degradation data 2.
Example 3
A degradable plastic fastener, which consists essentially of the following components in percentage by mass: 70% of poly (butylene succinate), 25.5% of polylactic acid, 4% of starch and 0.5% of toughening agent.
The preparation method is the same as example 1. And (4) burying the prepared fastener, and testing according to EN13432-2000 inspection standard to obtain degradation data 3.
Comparative example 1
A degradable plastic fastener, which consists essentially of the following components in percentage by mass: TPU 68%, styrene monomer 15%, polar monomer 5%, thickener 3%, initiator: 0.1%, thermal oxidation resistant stabilizer 0.4%, anaerobic biodegradable plastic additive: 2%, resin: 3%, flame retardant: 5 percent. The preparation method of the degradable plastic fastener comprises the following steps: sieving TPU, uniformly mixing a styrene monomer, a polar monomer and a thickening agent to obtain a mixed solution, mixing the TPU with 120 meshes and 140 meshes with the mixed solution, adding an initiator, an anti-thermal-oxygen stabilizer and resin, uniformly stirring to obtain a semi-molten solution, adding a flame retardant and an anaerobic biodegradable plastic additive into the semi-molten solution, stirring to obtain a semi-finished product, heating the semi-finished product at high temperature to obtain a molten solution, pouring the molten solution into a mold, cooling and molding, burying a molded fastener, and testing according to EN13432-2000 test standard to obtain comparative data 1.
| Examples of the invention | Example 1 | Example 2 | Example 3 | Comparative example 1 |
| Time of degradation | 175 days | 170 days | 162 days | 360 days |
The above embodiments are only for illustrating the invention and are not to be construed as limiting the invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention, therefore, all equivalent technical solutions also belong to the scope of the invention, and the scope of the invention is defined by the claims.
Claims (8)
1. A degradable plastic fastener is characterized in that the fastener mainly comprises the following components in percentage by mass: 60-90% of poly (butylene succinate), 5-45% of polylactic acid, 0.1-5% of starch and 0.1-2% of toughening agent.
2. The degradable plastic fastener of claim 1, wherein: the fastener mainly comprises the following components in percentage by mass: 60% of polybutylene succinate, 45% of polylactic acid, 4% of starch and 1% of toughening agent.
3. The degradable plastic fastener of claim 1, wherein: the fastener mainly comprises the following components in percentage by mass: 70% of poly (butylene succinate), 25.5% of polylactic acid, 4% of starch and 0.5% of toughening agent.
4. The degradable plastic fastener of claim 1, wherein: the fastener mainly comprises the following components in percentage by mass: 85% of polybutylene succinate, 10% of polylactic acid, 4% of starch and 1% of toughening agent.
5. The degradable plastic fastener of claim 1, wherein: the poly (butylene succinate) is a biodegradable polymer formed by esterifying succinic acid and butanediol.
6. A method of making the degradable plastic fastener of claim 1, comprising the steps of:
uniformly mixing dried polybutylene succinate, polylactic acid and starch to obtain a first mixture;
step two, adding a toughening agent into the mixture I and uniformly mixing to obtain a mixture II;
step three, heating the mixture II to a molten state;
and step four, injecting the mixture II in the molten state into a mold, pressurizing, cooling and molding to obtain the required degradable plastic fastener.
7. The method of claim 6, wherein the step of preparing a degradable plastic fastener comprises: in the third step, the heating temperature is 150-280 ℃.
8. The method of claim 6, wherein the step of preparing a degradable plastic fastener comprises: in the fourth step, the temperature of the die is 50-60 ℃, and the pressure is 60-90 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010985490.0A CN112029245A (en) | 2020-09-18 | 2020-09-18 | Degradable plastic fastener and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010985490.0A CN112029245A (en) | 2020-09-18 | 2020-09-18 | Degradable plastic fastener and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112029245A true CN112029245A (en) | 2020-12-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010985490.0A Pending CN112029245A (en) | 2020-09-18 | 2020-09-18 | Degradable plastic fastener and preparation method thereof |
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| Country | Link |
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| CN (1) | CN112029245A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112662153A (en) * | 2020-12-23 | 2021-04-16 | 广州赢盛塑料制品有限公司 | Environment-friendly degradable packaging bottle and preparation method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11124494A (en) * | 1997-10-23 | 1999-05-11 | Ykk Corp | Biodegradable resin molded product |
| CN1224737A (en) * | 1997-12-15 | 1999-08-04 | Ykk株式会社 | Formed article of biodegradable resin |
| CN105670248A (en) * | 2014-12-04 | 2016-06-15 | 河南青源天仁生物技术有限公司 | Full-degradable seedling breeding plate with PLA/PBS as base material and preparation method thereof |
| CN108219391A (en) * | 2017-12-05 | 2018-06-29 | 湖北光合生物科技有限公司 | A kind of poly butylene succinate composite material and preparation method thereof |
| CN109627702A (en) * | 2018-10-26 | 2019-04-16 | 惠州市中海源新材料科技有限公司 | A kind of Degradable environment protection polymer composite |
| WO2019155398A1 (en) * | 2018-02-07 | 2019-08-15 | Csir | Biodegradable plastic |
| JP2020124849A (en) * | 2019-02-05 | 2020-08-20 | 株式会社トスカバノック | Molding method for plastic products |
-
2020
- 2020-09-18 CN CN202010985490.0A patent/CN112029245A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11124494A (en) * | 1997-10-23 | 1999-05-11 | Ykk Corp | Biodegradable resin molded product |
| CN1224737A (en) * | 1997-12-15 | 1999-08-04 | Ykk株式会社 | Formed article of biodegradable resin |
| CN105670248A (en) * | 2014-12-04 | 2016-06-15 | 河南青源天仁生物技术有限公司 | Full-degradable seedling breeding plate with PLA/PBS as base material and preparation method thereof |
| CN108219391A (en) * | 2017-12-05 | 2018-06-29 | 湖北光合生物科技有限公司 | A kind of poly butylene succinate composite material and preparation method thereof |
| WO2019155398A1 (en) * | 2018-02-07 | 2019-08-15 | Csir | Biodegradable plastic |
| CN109627702A (en) * | 2018-10-26 | 2019-04-16 | 惠州市中海源新材料科技有限公司 | A kind of Degradable environment protection polymer composite |
| JP2020124849A (en) * | 2019-02-05 | 2020-08-20 | 株式会社トスカバノック | Molding method for plastic products |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112662153A (en) * | 2020-12-23 | 2021-04-16 | 广州赢盛塑料制品有限公司 | Environment-friendly degradable packaging bottle and preparation method thereof |
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