CN110628072A - Polylactic acid microporous foaming material, manufacturing method and jigsaw puzzle - Google Patents
Polylactic acid microporous foaming material, manufacturing method and jigsaw puzzle Download PDFInfo
- Publication number
- CN110628072A CN110628072A CN201911023700.1A CN201911023700A CN110628072A CN 110628072 A CN110628072 A CN 110628072A CN 201911023700 A CN201911023700 A CN 201911023700A CN 110628072 A CN110628072 A CN 110628072A
- Authority
- CN
- China
- Prior art keywords
- polylactic acid
- chain extender
- foaming
- agent
- parts
- 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.)
- Pending
Links
Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
- A63F9/00—Games not otherwise provided for
- A63F9/06—Patience; Other games for self-amusement
- A63F9/10—Two-dimensional jig-saw puzzles
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
- C08J9/102—Azo-compounds
- C08J9/103—Azodicarbonamide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention relates to a polylactic acid microcellular foaming material, a manufacturing method and a jigsaw puzzle, wherein the polylactic acid microcellular foaming material is prepared from the following formula: 90-100 parts of polylactic acid, 0-2 parts of chain extender, 0-3 parts of foaming agent, 0-3 parts of nucleating agent and 0-2 parts of active agent. When in preparation, the polylactic acid, the chain extender and the activator are uniformly mixed, extruded and granulated, and then uniformly mixed with the foaming agent and the nucleating agent and extruded. The polylactic acid with good compatibility and dissolving power is used as a main component for preparing the polylactic acid microporous foaming material, the degradability of the polylactic acid is further improved through the chain extender, full biodegradation and quick degradation can be realized, the polylactic acid microporous foaming material is green, environment-friendly and pollution-free, and meanwhile, the polylactic acid microporous foaming material has excellent chemical property and mechanical property, can be repeatedly used, is easy to produce and process, and is beneficial to mass production and wide application.
Description
Technical Field
The invention belongs to the technical field of foaming materials and toys, and particularly relates to a polylactic acid microporous foaming material, a manufacturing method thereof and a jigsaw puzzle.
Background
At present, the existing planar jigsaw puzzle is mainly made of materials such as paper boards, plastics, wood and the like, and the performance of the materials is limited, so that the planar jigsaw puzzle on the market has various problems. For example, the flat jigsaw puzzle made of cardboard is not resistant to water, sweat stain and the like, is easy to deform, soften and the like in the using process, and has extremely low reuse rate; the performance of the plane jigsaw puzzle made of the plastic is superior to that of the other two types, but the future development prospect is great as seen from European forbidden plastic; the wooden plane jigsaw puzzle has the problems of rough printing pattern, easy swelling caused by soaking in water, etc. Therefore, finding a novel environment-friendly manufacturing material for the plane jigsaw puzzle is an urgent problem to be solved in the field of jigsaw puzzles.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the polylactic acid microporous foam material which is easy to degrade, high in degradation speed, green, environment-friendly, pollution-free, excellent in chemical property and mechanical property, capable of being repeatedly used, easy to produce and process, beneficial to mass production and widely applied, the preparation method of the polylactic acid microporous foam material and the jigsaw puzzle toy prepared from the polylactic acid microporous foam material.
In order to solve the technical problems, the invention adopts the following technical scheme:
a polylactic acid microporous foaming material is prepared from the following formula: 90-100 parts of polylactic acid, 0-2 parts of chain extender, 0-3 parts of foaming agent, 0-3 parts of nucleating agent and 0-2 parts of active agent.
Further, the melt flow rate of the polylactic acid is 3-7 g/10 min.
Further, the chain extender is used for improving the melt strength of the polylactic acid and is one or two of a CX-1 chain extender and an ADR chain extender.
Further, the foaming agent is one or more than two of foaming agent master batches, a composite foaming agent and an AC foaming agent, wherein the composite foaming agent is prepared by compounding the AC foaming agent and sodium bicarbonate.
Further, the nucleating agent is talcum powder, and the active agent is liquid paraffin.
Further, the nucleating agent is superfine talcum powder with the average grain diameter of 1 mu m.
A method for preparing polylactic acid microporous foaming material,
uniformly mixing polylactic acid, a chain extender and an activator;
adding a mixed material of polylactic acid, a chain extender and an activator into a double screw to extrude a sample strip, sending the sample strip to a granulator, and dragging and cutting the sample strip into particles by the granulator;
and cooling and drying the particles, uniformly mixing the particles with a foaming agent and a nucleating agent, adding the mixture into an extruder, and extruding to obtain the polylactic acid microporous foaming material.
Further, before uniformly mixing the polylactic acid, the chain extender and the activator, drying the polylactic acid at 80 ℃ for 4 hours and drying the chain extender at 50 ℃ for 8 hours; cooling and drying the particles, specifically: and (3) cooling the granules by using water in a cooling water tank, and then drying the granules in a drying box for 8 hours at the temperature of 50 ℃.
Further, after the particles are cooled and dried, the particles are uniformly mixed with a foaming agent and a nucleating agent, the mixture is added into a single-screw extruder to be extruded and molded into a plate foaming sample, and the plate foaming sample is cut and flattened to prepare the polylactic acid microporous foaming plate.
An environment-friendly plane jigsaw puzzle comprises a base material, wherein the base material is a polylactic acid microporous foaming plate.
The invention mainly has the following beneficial effects:
according to the technical scheme, full biodegradation and rapid degradation can be realized, the polylactic acid microporous foaming material is green, environment-friendly and pollution-free, and meanwhile, the polylactic acid microporous foaming material is excellent in chemical property and mechanical property, can be repeatedly used, is easy to produce and process, and is beneficial to mass production and wide application.
Drawings
FIG. 1 is a flow chart of a method for manufacturing a polylactic acid microcellular foam material according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention relates to a polylactic acid microporous foaming material which is prepared from the following formula: 90-100 parts of polylactic acid (PLA), 0-2 parts of chain extender, 0-3 parts of foaming agent, 0-3 parts of nucleating agent and 0-2 parts of activator. Wherein the melt flow rate of the polylactic acid is 3-7 g/10min, such as: the polylactic acid is NATUREWORKS2002D polylactic acid thermoplastic plastic; the chain extender is used for improving the melt strength of the polylactic acid and can be one or two of CX-1 chain extender and ADR chain extender; the foaming agent can be one or more than two of foaming agent master batches, composite foaming agents and AC foaming agents, and the composite foaming agents are prepared by compounding the AC foaming agents and sodium bicarbonate; the nucleating agent is talcum powder (preferably superfine talcum powder with the average grain diameter of 1 mu m); the active agent is liquid paraffin.
As shown in fig. 1, the method for manufacturing the polylactic acid microcellular foaming material of the present invention comprises the following steps:
and step S1, uniformly mixing the polylactic acid, the chain extender and the activator.
Step S2, adding a mixed material of polylactic acid, a chain extender and an activator into a double screw to extrude a sample strip, sending the sample strip to a granulator, and dragging and cutting the sample strip into particles by the granulator; the temperature (DEG C, from the feed port to the extrusion section) of each section of the double-screw extruder is 140 ℃, 170 ℃, 190 ℃ and 170 ℃ respectively, and the screw rotating speed is 60 r/min.
And step S3, cooling and drying the particles, uniformly mixing the particles with a foaming agent and a nucleating agent, adding the mixture into an extruder, and extruding to obtain the polylactic acid microporous foaming material.
Wherein, before uniformly mixing the polylactic acid, the chain extender and the activator, the polylactic acid is dried for 4 hours at the temperature of 80 ℃ and the chain extender is dried for 8 hours at the temperature of 50 ℃; cooling and drying the particles, specifically: and (3) cooling the granules by using water in a cooling water tank, and then drying the granules in a drying box for 8 hours at the temperature of 50 ℃.
In addition, if the polylactic acid microporous foaming material is a polylactic acid microporous foaming plate, the particles are cooled and dried, then are uniformly mixed with a foaming agent and a nucleating agent, then are added into a single-screw extruder to be extruded and molded into a plate foaming sample, and then are cut and flattened; the temperature of each section of the single-screw extruder is as follows: 140 ℃, 170 ℃, 180 ℃, 170 ℃, the head temperature is 130-170 ℃, the screw rotating speed is 10-40 r/min, and the length value of the straight section of the outlet of the head neck mold is 5-15 mm.
The polylactic acid microcellular foaming material and the manufacturing method of the present invention are further described by three examples.
Example one:
the polylactic acid microporous foaming material is prepared from the following formula:
when the polylactic acid microporous foamed material is manufactured, firstly, the American NATUREWORKS2002D polylactic acid thermoplastic is dried for 4 hours at the temperature of 80 ℃, the ADR chain extender is dried for 8 hours at the temperature of 50 ℃, then the American NATUREWORKS2002D polylactic acid thermoplastic, the ADR chain extender and liquid paraffin are uniformly mixed, then the mixed material of the American NATUREWORKS2002D polylactic acid thermoplastic, the ADR chain extender and the liquid paraffin is added into a double screw to be extruded into a sample strip, the sample strip is sent to a granulator to be drawn and cut into particles by the granulator, finally, the particles are cooled by cooling water in a cooling water tank, are placed in a drying box to be dried for 8 hours at the temperature of 50 ℃, are uniformly mixed with a foaming agent and a nucleating agent in a high-speed mixer, and then are extruded by a single screw extruder to prepare the polylactic acid microporous foamed material. Wherein the temperature of each section of the double-screw extruder is respectively 140 ℃, 170 ℃, 190 ℃, 170 ℃, and the screw rotating speed is 60 r/min; the temperature of each section of the single-screw extruder is as follows: 140 ℃, 170 ℃, 180 ℃, 170 ℃, the head temperature is 150 ℃, the screw rotating speed is 20r/min, and the length value of the straight section of the outlet of the head neck ring mold is 10 mm.
According to national standards GB/T6343-2009 and GB/T6344-2008, the foaming material is subjected to apparent density and tensile strength tests, wherein the foaming sample bar of the first example has the apparent density of 0.47g/cm3 and the tensile strength of 19.6MPa, and the average size of cells is 63 mu m measured by a scanning electron microscope. In addition, the prepared polylactic acid foamed sheet keeps the advantage of polylactic acid biodegradation, and completely meets the American ASTM D6400 and European Union EN13432 degradation certification standard.
Example two:
the polylactic acid microporous foaming material is prepared from the following formula:
when the polylactic acid microporous foamed material is manufactured, firstly, the American NATUREWORKS2002D polylactic acid thermoplastic is dried for 4 hours at the temperature of 80 ℃, the ADR chain extender is dried for 8 hours at the temperature of 50 ℃, then the American NATUREWORKS2002D polylactic acid thermoplastic, the ADR chain extender and liquid paraffin are uniformly mixed, then the mixed material of the American NATUREWORKS2002D polylactic acid thermoplastic, the ADR chain extender and the liquid paraffin is added into a double screw to be extruded into a sample strip, the sample strip is sent to a granulator to be drawn and cut into particles by the granulator, finally, the particles are cooled by cooling water in a cooling water tank, are placed in a drying box to be dried for 8 hours at the temperature of 50 ℃, are uniformly mixed with a foaming agent and a nucleating agent in a high-speed mixer, and then are extruded by a single screw extruder to prepare the polylactic acid microporous foamed material. Wherein the temperature of each section of the double-screw extruder is respectively 140 ℃, 170 ℃, 190 ℃, 170 ℃, and the screw rotating speed is 60 r/min; the temperature of each section of the single-screw extruder is as follows: 140 ℃, 170 ℃, 180 ℃, 170 ℃, 160 ℃ of the head temperature, 30r/min of screw rotation speed and 8mm of the length of the straight section of the outlet of the mouth mold of the head.
According to national standards GB/T6343-2009 and GB/T6344-2008, the foaming material is subjected to apparent density and tensile strength tests, the apparent density of the foaming sample strip of the second example is 0.6g/cm3, the tensile strength is 8.7MPa, and the average size of cells is 56 μm measured by a scanning electron microscope. In addition, the prepared polylactic acid foamed sheet keeps the advantage of polylactic acid biodegradation, and completely meets the American ASTM D6400 and European Union EN13432 degradation certification standard.
Example three:
the polylactic acid microporous foaming material is prepared from the following formula:
when the polylactic acid microporous foamed material is manufactured, firstly, the American NATUREWORKS2002D polylactic acid thermoplastic is dried for 4 hours at the temperature of 80 ℃, a CX-1 chain extender is dried for 8 hours at the temperature of 50 ℃, then the American NATUREWORKS2002D polylactic acid thermoplastic, the CX-1 chain extender and liquid paraffin are uniformly mixed, then the mixed material of the American NATUREWORKS2002D polylactic acid thermoplastic, the CX-1 chain extender and the liquid paraffin is added into a double screw to be extruded into a sample bar, the sample bar is sent to a granulator to be drawn and cut into particles by the granulator, finally, the particles are cooled by cooling water in a cooling water tank and then are placed in a drying box to be dried for 8 hours at the temperature of 50 ℃, then the particles are uniformly mixed with a foaming agent and a nucleating agent in a high-speed mixer, and then the single screw extruder is used for extrusion to manufacture the polylactic acid microporous foamed. Wherein the temperature of each section of the double-screw extruder is respectively 140 ℃, 170 ℃, 190 ℃, 170 ℃, and the screw rotating speed is 60 r/min; the temperature of each section of the single-screw extruder is as follows: 140 ℃, 170 ℃, 180 ℃, 170 ℃, the head temperature is 140 ℃, the screw rotating speed is 38r/min, and the length of the straight section of the outlet of the head neck mold is 12 mm.
The foam materials were tested for apparent density and tensile strength according to national standards GB/T6343-2009 and GB/T6344-2008, and the foam sample bars of example three had an apparent density of 0.67g/cm3 and a tensile strength of 12.4MPa, and the average cell size was 53 μm as measured by scanning electron microscopy. In addition, the prepared polylactic acid foamed sheet keeps the advantage of polylactic acid biodegradation, completely accords with the degradation certification standard of American ASTMD6400 and European Union EN13432, can be completely degraded by microorganisms in the nature after being used, finally generates carbon dioxide and water, does not pollute the environment, and has important significance for relieving the shortage of petroleum resources and solving white pollution.
In conclusion, the polylactic acid with good compatibility and dissolving power is used as the main component for preparing the polylactic acid microporous foaming material, the degradability of the polylactic acid is further improved through the chain extender, full biodegradation and rapid degradation can be realized, the polylactic acid microporous foaming material is green, environment-friendly and pollution-free, and meanwhile, the polylactic acid microporous foaming material has excellent chemical property and mechanical property, can be repeatedly used, is easy to produce and process, and is beneficial to mass production and wide application.
The invention also provides an environment-friendly plane jigsaw puzzle, which comprises a base material, wherein the base material is a polylactic acid microporous foaming plate, the polylactic acid microporous foaming plate is manufactured into a jigsaw puzzle through flexo printing and laser cutting, and then the front surface of the jigsaw puzzle and the chamfer angle of the side surface of the contact edge are subjected to fine machining to form an arc chamfer angle, and then the jigsaw puzzle is packaged and delivered out of a warehouse.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. The polylactic acid microporous foaming material is characterized by being prepared from the following formula: 90-100 parts of polylactic acid, 0-2 parts of chain extender, 0-3 parts of foaming agent, 0-3 parts of nucleating agent and 0-2 parts of active agent.
2. The polylactic acid microcellular foaming material according to claim 1, wherein the melt flow rate of the polylactic acid is 3 to 7g/10 min.
3. The polylactic acid microcellular foam material according to claim 1 or 2, wherein the chain extender is one or both of a CX-1 chain extender and an ADR chain extender for improving melt strength of the polylactic acid.
4. The polylactic acid microcellular foam material according to claim 1 or 2, wherein the foaming agent is one or more of foaming agent master batch, composite foaming agent and AC foaming agent, wherein the composite foaming agent is prepared by compounding AC foaming agent and sodium bicarbonate.
5. The microcellular polylactic acid foam according to claim 1 or 2, wherein the nucleating agent is talc, and the active agent is liquid paraffin.
6. The microcellular polylactic acid foam according to claim 5, wherein said nucleating agent is ultrafine talc having an average particle diameter of 1 μm.
7. A method for preparing polylactic acid microporous foaming material is characterized in that,
uniformly mixing polylactic acid, a chain extender and an activator;
adding a mixed material of polylactic acid, a chain extender and an activator into a double screw to extrude a sample strip, sending the sample strip to a granulator, and dragging and cutting the sample strip into particles by the granulator;
and cooling and drying the particles, uniformly mixing the particles with a foaming agent and a nucleating agent, adding the mixture into an extruder, and extruding to obtain the polylactic acid microporous foaming material.
8. The method of claim 7, wherein the polylactic acid is dried at 80 ℃ for 4 hours and the chain extender is dried at 50 ℃ for 8 hours before the polylactic acid, the chain extender and the activator are uniformly mixed; cooling and drying the particles, specifically: and (3) cooling the granules by using water in a cooling water tank, and then drying the granules in a drying box for 8 hours at the temperature of 50 ℃.
9. The method as claimed in claim 7, wherein the pellets are cooled, dried, mixed with the foaming agent and the nucleating agent uniformly, added into a single screw extruder, extruded to form a foamed sample of the plate, cut and flattened to form the polylactic acid microcellular foamed plate.
10. An environment-friendly plane jigsaw puzzle is characterized by comprising a base material, wherein the base material is a polylactic acid microporous foaming board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911023700.1A CN110628072A (en) | 2019-10-25 | 2019-10-25 | Polylactic acid microporous foaming material, manufacturing method and jigsaw puzzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911023700.1A CN110628072A (en) | 2019-10-25 | 2019-10-25 | Polylactic acid microporous foaming material, manufacturing method and jigsaw puzzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110628072A true CN110628072A (en) | 2019-12-31 |
Family
ID=68977712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911023700.1A Pending CN110628072A (en) | 2019-10-25 | 2019-10-25 | Polylactic acid microporous foaming material, manufacturing method and jigsaw puzzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110628072A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111825968A (en) * | 2020-08-13 | 2020-10-27 | 合聚高分子材料科技(广东)有限公司 | Polylactic acid foaming material and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1958668A (en) * | 2006-10-12 | 2007-05-09 | 同济大学 | Plastic foam sheet material of poly lactic acid as suction plastic, and preparation method |
| KR20090008899A (en) * | 2007-07-19 | 2009-01-22 | 정지수 | Polymer composition of polylactic acid, foam sheet using the same, manufacturing method thereof and use of foam-molding product thereby |
| CN109651783A (en) * | 2018-12-12 | 2019-04-19 | 重庆普利特新材料有限公司 | A kind of fretting map natural fibre reinforced polylactic acid composite material and preparation method thereof |
-
2019
- 2019-10-25 CN CN201911023700.1A patent/CN110628072A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1958668A (en) * | 2006-10-12 | 2007-05-09 | 同济大学 | Plastic foam sheet material of poly lactic acid as suction plastic, and preparation method |
| KR20090008899A (en) * | 2007-07-19 | 2009-01-22 | 정지수 | Polymer composition of polylactic acid, foam sheet using the same, manufacturing method thereof and use of foam-molding product thereby |
| CN109651783A (en) * | 2018-12-12 | 2019-04-19 | 重庆普利特新材料有限公司 | A kind of fretting map natural fibre reinforced polylactic acid composite material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 廖润华等: "《环境治理功能材料》", 30 April 2017, 中国建材工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111825968A (en) * | 2020-08-13 | 2020-10-27 | 合聚高分子材料科技(广东)有限公司 | Polylactic acid foaming material and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102304260A (en) | Polyvinyl alcohol foaming material and manufacture method thereof | |
| CN103360682B (en) | Heat-insulated degradable polypropylene foaming material and production method thereof | |
| CN110317399B (en) | Expanded flame-retardant polypropylene lightweight material and continuous extrusion foaming preparation method thereof | |
| CN110283438B (en) | Base resin for blow molding degradable film and blow molding degradable film | |
| US20180016420A1 (en) | Method for producing modified polyester resin reinforced with carbon fiber | |
| CN113736129B (en) | Lignin-containing biodegradable polyester composite bead foaming material with high crystallization rate and preparation method thereof | |
| CN104371296A (en) | Poly-methyl ethylene carbonate composition and preparation method thereof | |
| JP2018039952A (en) | Method for producing sheet | |
| CN109370005A (en) | One kind can silk-screen blow molding fretting map tool box and preparation method thereof | |
| CN113652029A (en) | Micro-foaming polypropylene composition and preparation method and application thereof | |
| CN110628072A (en) | Polylactic acid microporous foaming material, manufacturing method and jigsaw puzzle | |
| CN105602114A (en) | Polypropylene foamed composite board and manufacturing method thereof | |
| CN1800249A (en) | Biodegradable starch-base foaming composition and foaming product containing same | |
| CN111748122B (en) | Expandable biodegradable particles and high-foaming-rate biodegradable expanded beads with antistatic function | |
| CN117264382A (en) | High-barrier high-mechanical-property full-biodegradable mulching film and preparation method thereof | |
| CN111138704A (en) | Application of high-melt-strength PVC (polyvinyl chloride) foaming regulator in foaming plate | |
| EP2537891A1 (en) | Manufacturing method for resin composition containing fine paper powder | |
| CN114736404B (en) | Polyvinyl alcohol product capable of remarkably improving plasticizer migration and preparation method thereof | |
| CN111171366A (en) | Low-density polypropylene bead foam and preparation method and application thereof | |
| CN103923382B (en) | A kind of low melting point height can cementability expanded polypropylene beads and preparation method thereof | |
| CN111117124A (en) | Hot water soluble polyvinyl alcohol film and preparation method and application thereof | |
| CN112876824A (en) | Degradable PBST/PPC composite foaming material and preparation method thereof | |
| JP2005336217A (en) | Composite material and method for producing the same | |
| CN112341724A (en) | Composition for preparing microcellular foam material, microcellular foam material and preparation method thereof | |
| CN111205520A (en) | Micro-foaming ball for pet and manufacturing method thereof |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191231 |
|
| RJ01 | Rejection of invention patent application after publication |