CN110922727A - Degradable lunch box - Google Patents
Degradable lunch box Download PDFInfo
- Publication number
- CN110922727A CN110922727A CN201911166843.8A CN201911166843A CN110922727A CN 110922727 A CN110922727 A CN 110922727A CN 201911166843 A CN201911166843 A CN 201911166843A CN 110922727 A CN110922727 A CN 110922727A
- Authority
- CN
- China
- Prior art keywords
- parts
- polylactic acid
- box
- lunch box
- box body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
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
- C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
- A45C11/00—Receptacles for purposes not provided for in groups A45C1/00-A45C9/00
- A45C11/20—Lunch or picnic boxes or the like
-
- 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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- 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
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention belongs to the technical field of catering articles, and provides a degradable lunch box which comprises a box body and a box cover, wherein the box body and the box cover are both made of polylactic acid composite materials. The box body and the box cover are made of the following materials: 97-99 parts of right-handed polylactic acid, 1-3 parts of left-handed polylactic acid, 5-50 parts of vinyl acetate, 2-5 parts of chain extender, 1-5 parts of flexibilizer, 100-200 parts of ethyl butyl perfluoroether, 200-600 parts of organic alcohol, 80-200 parts of organochlorosilane and 30-100 parts of trialkyl monochlorosilane.
Description
Technical Field
The invention belongs to the technical field of preparation of catering articles, and relates to a degradable lunch box.
Background
With the taking-out into people's life, the taking-out has become the lifestyle of many people, and according to survey data, 146 hundred million lunch boxes are used in China in average year, most of the lunch boxes are not degradable, the result of the large use is irreversible pollution and damage to the environment, and at present, some degradable lunch boxes are also available in the market, but the price of the degradable lunch box is higher, the merchant is not far away to use, and the reason that the price of the degradable lunch box is high is that the preparation cost of the degradable material is higher, so that the degradable lunch box with low cost is needed to be provided.
Disclosure of Invention
The invention aims to provide a degradable lunch box, which solves the problem that the degradable lunch box in the prior art is high in preparation cost.
The technical scheme adopted by the invention is that,
a degradable lunch box comprises a box body and a box cover, wherein the box body and the box cover are both made of polylactic acid composite materials.
Yet another feature of the present invention is that,
the preparation method of the box body and the box cover comprises the following steps:
firstly, sequentially adding dextro-lactide, an initiator and a catalyst into a solvent at a high temperature, and reacting to prepare dextro-polylactic acid;
secondly, weighing 97-99 parts of the right-handed polylactic acid, 1-3 parts of the left-handed polylactic acid, 5-50 parts of vinyl acetate, 2-5 parts of a chain extender, 1-5 parts of a flexibilizer, 100-200 parts of ethyl butyl perfluoroether, 200-600 parts of organic alcohol, 80-200 parts of organic chlorosilane and 30-100 parts of trialkyl monochlorosilane according to the mass fraction, and uniformly mixing to obtain a mixture;
thirdly, putting the mixture obtained in the second step into a double-screw extruder, extruding and granulating to obtain master batches;
step four, mixing 15-20 parts of talcum powder with the master batch obtained in the step three to obtain a precursor;
fifthly, putting the precursor obtained in the fourth step into a double-screw extruder, and extruding to obtain the polylactic acid composite material;
and sixthly, respectively pressing the polylactic acid composite material prepared in the fifth step into a box body and a box cover of the lunch box by using a mould.
In the first step, the mass ratio of the initiator to the dextrorotatory lactide is 6-9: 1000, and the dosage of the catalyst is 0.4-0.6% of the mass of the dextrorotatory lactide.
The initiator is isopropanol, the catalyst is aluminum isopropoxide, and the solvent is dichloromethane.
The reaction temperature is 120-140 ℃.
The invention has the beneficial effects that the materials used for preparing the lunch box are common, the components of the lunch box comprise the poly-D-lactic acid and poly-L-lactic acid, the preparation method is simple, compared with the existing degradable lunch box, the preparation process is simpler and more environment-friendly, the high temperature resistance of the lunch box is improved, and meanwhile, the components of the lunch box contain vinyl acetate, so that the flexibility of the lunch box is improved.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
A degradable lunch box comprises a box body and a box cover, wherein the box body and the box cover are both made of polylactic acid composite materials.
The preparation method of the box body and the box cover comprises the following steps:
the method comprises the following steps of firstly, sequentially adding dextrorotatory lactide, an initiator and a catalyst into a solvent at a high temperature, and reacting to prepare dextrorotatory polylactic acid, wherein the mass ratio of the initiator to the dextrorotatory lactide is 6-9: 1000, the dosage of the catalyst is 0.4-0.6% of the mass of the dextrorotatory lactide, the initiator is isopropanol, the catalyst is aluminum isopropoxide, the solvent is dichloromethane, and the reaction temperature is 120-140 ℃;
secondly, weighing 97-99 parts of the right-handed polylactic acid, 1-3 parts of the left-handed polylactic acid, 5-50 parts of vinyl acetate, 2-5 parts of a chain extender, 1-5 parts of a flexibilizer, 100-200 parts of ethyl butyl perfluoroether, 200-600 parts of organic alcohol, 80-200 parts of organic chlorosilane and 30-100 parts of trialkyl monochlorosilane according to the mass fraction, and uniformly mixing to obtain a mixture;
thirdly, putting the mixture obtained in the second step into a double-screw extruder, extruding and granulating to obtain master batches;
step four, mixing 15-20 parts of talcum powder with the master batch obtained in the step three to obtain a precursor;
fifthly, putting the precursor obtained in the fourth step into a double-screw extruder, and extruding to obtain the polylactic acid composite material;
and sixthly, respectively pressing the polylactic acid composite material prepared in the fifth step into a box body and a box cover of the lunch box by using a mould.
Example 1
Firstly, sequentially adding dextrorotatory lactide, an initiator and a catalyst into a solvent at a high temperature, and reacting to prepare dextrorotatory polylactic acid, wherein the mass ratio of the initiator to the dextrorotatory lactide is 6:1000, the dosage of the catalyst is 0.4 percent of the mass of the dextrorotatory lactide, the initiator is isopropanol, the catalyst is aluminum isopropoxide, the solvent is dichloromethane, and the reaction temperature is 120 ℃;
secondly, weighing 97 parts of the right-handed polylactic acid, 1 part of the left-handed polylactic acid, 5 parts of vinyl acetate, 2 parts of a chain extender, 1 part of a toughening agent, 100 parts of ethyl butyl perfluoroether, 200 parts of organic alcohol, 80 parts of organochlorosilane and 30 parts of trihydrocarbyl monochlorosilane according to the mass fraction, and uniformly mixing to obtain a mixture;
thirdly, putting the mixture obtained in the second step into a double-screw extruder, extruding and granulating to obtain master batches;
step four, taking 15 parts of talcum powder, and mixing the talcum powder with the master batch obtained in the step three to obtain a precursor;
fifthly, putting the precursor obtained in the fourth step into a double-screw extruder, and extruding to obtain the polylactic acid composite material;
and sixthly, respectively pressing the polylactic acid composite material prepared in the fifth step into a box body and a box cover of the lunch box by using a mould.
Example 2
The method comprises the following steps of firstly, sequentially adding dextrorotatory lactide, an initiator and a catalyst into a solvent at a high temperature, and reacting to prepare dextrorotatory polylactic acid, wherein the mass ratio of the initiator to the dextrorotatory lactide is 9:1000, the dosage of the catalyst is 0.6 percent of the mass of the dextrorotatory lactide, the initiator is isopropanol, the catalyst is aluminum isopropoxide, the solvent is dichloromethane, and the reaction temperature is 140 ℃;
secondly, respectively weighing 99 parts of the right-handed polylactic acid, 3 parts of the left-handed polylactic acid, 50 parts of vinyl acetate, 5 parts of a chain extender, 5 parts of a toughening agent, 200 parts of ethyl butyl perfluoroether, 600 parts of organic alcohol, 200 parts of organochlorosilane and 100 parts of trihydrocarbyl monochlorosilane prepared in the first step according to mass fraction, and uniformly mixing to obtain a mixture;
thirdly, putting the mixture obtained in the second step into a double-screw extruder, extruding and granulating to obtain master batches;
step four, taking 20 parts of talcum powder, and mixing the talcum powder with the master batch obtained in the step three to obtain a precursor;
fifthly, putting the precursor obtained in the fourth step into a double-screw extruder, and extruding to obtain the polylactic acid composite material;
and sixthly, respectively pressing the polylactic acid composite material prepared in the fifth step into a box body and a box cover of the lunch box by using a mould.
Example 3
The method comprises the following steps of firstly, sequentially adding dextrorotatory lactide, an initiator and a catalyst into a solvent at a high temperature, and reacting to prepare dextrorotatory polylactic acid, wherein the mass ratio of the initiator to the dextrorotatory lactide is 7.5:1000, the dosage of the catalyst is 0.4 percent of the mass of the dextrorotatory lactide, the initiator is isopropanol, the catalyst is aluminum isopropoxide, the solvent is dichloromethane, and the reaction temperature is 130 ℃;
secondly, respectively weighing 98 parts of the right-handed polylactic acid, 2 parts of the left-handed polylactic acid, 30 parts of vinyl acetate, 3.5 parts of a chain extender, 3 parts of a toughening agent, 150 parts of ethyl butyl perfluoroether, 400 parts of organic alcohol, 140 parts of organochlorosilane and 65 parts of trihydrocarbyl monochlorosilane according to the mass fraction, and uniformly mixing to obtain a mixture;
thirdly, putting the mixture obtained in the second step into a double-screw extruder, extruding and granulating to obtain master batches;
fourthly, taking 17.5 parts of talcum powder, and mixing the talcum powder with the master batch obtained in the third step to obtain a precursor;
fifthly, putting the precursor obtained in the fourth step into a double-screw extruder, and extruding to obtain the polylactic acid composite material;
and sixthly, respectively pressing the polylactic acid composite material prepared in the fifth step into a box body and a box cover of the lunch box by using a mould.
Claims (5)
1. A degradable lunch box is characterized by comprising a box body and a box cover, wherein the box body and the box cover are both made of polylactic acid composite materials.
2. The degradable lunch box of claim 1, wherein the box body and the box cover are prepared by the following steps:
firstly, sequentially adding dextro-lactide, an initiator and a catalyst into a solvent at a high temperature, and reacting to prepare dextro-polylactic acid;
secondly, weighing 97-99 parts of the right-handed polylactic acid, 1-3 parts of the left-handed polylactic acid, 5-50 parts of vinyl acetate, 2-5 parts of a chain extender, 1-5 parts of a flexibilizer, 100-200 parts of ethyl butyl perfluoroether, 200-600 parts of organic alcohol, 80-200 parts of organic chlorosilane and 30-100 parts of trialkyl monochlorosilane according to the mass fraction, and uniformly mixing to obtain a mixture;
thirdly, putting the mixture obtained in the second step into a double-screw extruder, extruding and granulating to obtain master batches;
step four, mixing 15-20 parts of talcum powder with the master batch obtained in the step three to obtain a precursor;
and fifthly, putting the precursor obtained in the fourth step into a double-screw extruder, and extruding to obtain the polylactic acid composite material.
And sixthly, respectively pressing the polylactic acid composite material prepared in the fifth step into a box body and a box cover of the lunch box by using a mould.
3. The degradable lunch box of claim 2, wherein in the first step, the mass ratio of the initiator to the D-lactide is 6-9: 1000, and the amount of the catalyst is 0.4-0.6% of the mass of the D-lactide.
4. The degradable lunch box of claim 3, wherein the initiator is isopropanol, the catalyst is aluminum isopropoxide, and the solvent is dichloromethane.
5. A degradable lunch box according to claim 3, wherein the reaction temperature is 120 ℃ to 140 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911166843.8A CN110922727A (en) | 2019-11-25 | 2019-11-25 | Degradable lunch box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911166843.8A CN110922727A (en) | 2019-11-25 | 2019-11-25 | Degradable lunch box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110922727A true CN110922727A (en) | 2020-03-27 |
Family
ID=69850942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911166843.8A Withdrawn CN110922727A (en) | 2019-11-25 | 2019-11-25 | Degradable lunch box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110922727A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113498920A (en) * | 2021-08-11 | 2021-10-15 | 苏州丰连实业有限公司 | Environment-friendly heat-resistant lunch box and preparation method thereof |
-
2019
- 2019-11-25 CN CN201911166843.8A patent/CN110922727A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113498920A (en) * | 2021-08-11 | 2021-10-15 | 苏州丰连实业有限公司 | Environment-friendly heat-resistant lunch box and preparation method thereof |
| CN113498920B (en) * | 2021-08-11 | 2023-04-11 | 苏州丰连实业有限公司 | Environment-friendly heat-resistant lunch box and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102115606A (en) | Adhesive and method for preparing metal powder injection molding feedstock from same | |
| CA2630488A1 (en) | Novel borozirconate systems in completion systems | |
| WO2009004745A1 (en) | Polyethylene terephthalate graft copolymer resin and process for producing molded object thereof | |
| CN110922727A (en) | Degradable lunch box | |
| CN104610892A (en) | Formula of environment-friendly particle hot-melt type pressure-sensitive adhesive and preparation method for adhesive | |
| CN103601870B (en) | A kind of low gloss powder coating epoxy resin and its preparation method and application | |
| CN102744815A (en) | Polyurethane foaming releasing agent and preparation method thereof | |
| CN101486805B (en) | Preparation of calcium zinc composite stabilizer for processing plastic | |
| CN102702725A (en) | Preparation method of leadless high-density plasticine | |
| CN103642064A (en) | Regeneration technique of urea-formaldehyde resin and composite material containing regenerated urea-formaldehyde resin | |
| CN103937397B (en) | A kind of dermatoglyph powder coating | |
| CN103820067B (en) | Hot transfer printing backsize composition of dry method PU and preparation method thereof | |
| CN104015458B (en) | A kind of preparation method of high-strength amino SMC modification moulding compound | |
| CN104073314A (en) | Solid fuel production method | |
| CN103102779A (en) | High-grade and high-firmness transparent primer and preparation method thereof | |
| CN112430384B (en) | Preparation process of bio-based degradable renewable energy polymeric plastic particles | |
| CN102336882B (en) | Environmentally-friendly storage-stable polyurethane composition for reaction injection molding and preparation method thereof | |
| CN102775644B (en) | Nanocomposite starch micro-foaming biodegradable material | |
| CN102964770B (en) | A kind of Magnetic heat-resistant plastic alloy material and preparation method thereof | |
| CN204222418U (en) | A kind of ink-jet advertisement consumptive material | |
| CN101440087B (en) | Phthalimide diglycidyl ether and preparation thereof | |
| AU6691800A (en) | Method for producing flat articles from renewable raw materials | |
| CN104072739A (en) | Hydrolysis resisting aqueous alkyd resin and preparation method thereof | |
| CN102174224A (en) | Environmentally-friendly frozen food packaging material and method for producing frozen food package by using same | |
| CN108034082A (en) | A kind of preparation method of starch composite foam material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200327 |