CN115536978A - Polyformaldehyde resin composition and preparation method and application thereof - Google Patents
Polyformaldehyde resin composition and preparation method and application thereof Download PDFInfo
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- CN115536978A CN115536978A CN202211201241.3A CN202211201241A CN115536978A CN 115536978 A CN115536978 A CN 115536978A CN 202211201241 A CN202211201241 A CN 202211201241A CN 115536978 A CN115536978 A CN 115536978A
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- molecular weight
- resin composition
- high molecular
- polyformaldehyde resin
- polyoxymethylene resin
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- 229920006324 polyoxymethylene Polymers 0.000 title claims abstract description 42
- 239000011342 resin composition Substances 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title abstract description 10
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 23
- 239000004705 High-molecular-weight polyethylene Substances 0.000 claims abstract description 19
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 19
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 19
- 229920005989 resin Polymers 0.000 claims abstract description 16
- 239000011347 resin Substances 0.000 claims abstract description 16
- 229930040373 Paraformaldehyde Natural products 0.000 claims description 17
- 239000003963 antioxidant agent Substances 0.000 claims description 12
- 230000003078 antioxidant effect Effects 0.000 claims description 12
- 239000006096 absorbing agent Substances 0.000 claims description 4
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000005469 granulation Methods 0.000 claims description 3
- 230000003179 granulation Effects 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 abstract description 7
- 239000004810 polytetrafluoroethylene Substances 0.000 abstract description 7
- 230000000052 comparative effect Effects 0.000 description 22
- 239000000463 material Substances 0.000 description 13
- 239000004594 Masterbatch (MB) Substances 0.000 description 11
- 229920003023 plastic Polymers 0.000 description 7
- 239000004033 plastic Substances 0.000 description 7
- 238000005299 abrasion Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000011056 performance test Methods 0.000 description 4
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 description 3
- 229920006351 engineering plastic Polymers 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920002538 Polyethylene Glycol 20000 Polymers 0.000 description 2
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 2
- POJWUDADGALRAB-UHFFFAOYSA-N allantoin Chemical compound NC(=O)NC1NC(=O)NC1=O POJWUDADGALRAB-UHFFFAOYSA-N 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 2
- 239000013065 commercial product Substances 0.000 description 2
- 150000002466 imines Chemical class 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 2
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 2
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 2
- OLFNXLXEGXRUOI-UHFFFAOYSA-N 2-(benzotriazol-2-yl)-4,6-bis(2-phenylpropan-2-yl)phenol Chemical compound C=1C(N2N=C3C=CC=CC3=N2)=C(O)C(C(C)(C)C=2C=CC=CC=2)=CC=1C(C)(C)C1=CC=CC=C1 OLFNXLXEGXRUOI-UHFFFAOYSA-N 0.000 description 1
- QSRJVOOOWGXUDY-UHFFFAOYSA-N 2-[2-[2-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propanoyloxy]ethoxy]ethoxy]ethyl 3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C)=CC(CCC(=O)OCCOCCOCCOC(=O)CCC=2C=C(C(O)=C(C)C=2)C(C)(C)C)=C1 QSRJVOOOWGXUDY-UHFFFAOYSA-N 0.000 description 1
- POJWUDADGALRAB-PVQJCKRUSA-N Allantoin Natural products NC(=O)N[C@@H]1NC(=O)NC1=O POJWUDADGALRAB-PVQJCKRUSA-N 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920002594 Polyethylene Glycol 8000 Polymers 0.000 description 1
- 229920012196 Polyoxymethylene Copolymer Polymers 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- VSVVZZQIUJXYQA-UHFFFAOYSA-N [3-(3-dodecylsulfanylpropanoyloxy)-2,2-bis(3-dodecylsulfanylpropanoyloxymethyl)propyl] 3-dodecylsulfanylpropanoate Chemical compound CCCCCCCCCCCCSCCC(=O)OCC(COC(=O)CCSCCCCCCCCCCCC)(COC(=O)CCSCCCCCCCCCCCC)COC(=O)CCSCCCCCCCCCCCC VSVVZZQIUJXYQA-UHFFFAOYSA-N 0.000 description 1
- 229960000458 allantoin Drugs 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 description 1
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel 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
- C08L59/00—Compositions of polyacetals; Compositions of derivatives of polyacetals
- C08L59/02—Polyacetals containing polyoxymethylene sequences only
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L59/00—Compositions of polyacetals; Compositions of derivatives of polyacetals
- C08L59/04—Copolyoxymethylenes
Abstract
The invention discloses a polyformaldehyde resin composition as well as a preparation method and an application thereof, wherein the polyformaldehyde resin composition comprises the following components in parts by weight: 100 parts of polyformaldehyde resin; 5-15 parts of ultrahigh molecular weight silicone; 5-8 parts of polytetrafluoroethylene; 0.4 to 1.2 portions of high molecular weight polyethylene glycol. The polyformaldehyde resin composition provided by the invention has the characteristics of low friction coefficient, high wear resistance and low mold deposit, and can be suitable for occasions with higher requirements on indexes such as lubricity, wear resistance and mold deposit.
Description
Technical Field
The invention belongs to the technical field of engineering plastics, and particularly relates to a polyformaldehyde resin composition as well as a preparation method and application thereof.
Background
Polyoxymethylene (POM) is a high-crystallinity engineering plastic, has excellent comprehensive mechanical properties, self-lubricating properties, wear resistance and fatigue resistance, is the best lubricating property of general engineering plastics, and is widely applied to products such as gears, bearings and the like. However, in some application scenarios, POM still has the problems of too high friction coefficient, insufficient wear resistance and the like, and the requirements of the use environment can be met by applying silicone grease and the like on the exterior.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a polyformaldehyde resin composition and a preparation method and application thereof. The polyformaldehyde resin composition provided by the invention has the characteristics of low friction coefficient, high wear resistance and low mold deposit, and can be suitable for occasions with higher requirements on indexes such as lubricity, wear resistance and mold deposit.
The method is realized by the following technical scheme:
the polyformaldehyde resin composition comprises the following components in parts by weight:
further, the polyformaldehyde resin is copolymerized polyformaldehyde resin and/or homopolymerized polyformaldehyde resin, the melt index of the polyformaldehyde resin is 2-27g/10min, the test standard is ISO 1133-1-2012, and the test conditions are 190 ℃ and 2.16KG.
Further, the number average molecular weight of the ultrahigh molecular weight silicone is 100 ten thousand or more, preferably 100 to 1000 ten thousand. The ultra-high molecular weight silicone and the polytetrafluoroethylene synergistically improve the wear resistance of the material. In addition, the ultra-high molecular weight silicone can also improve the lubricity of the material.
Specifically, the ultra-high molecular weight silicone can be used in the form of master batches, the carrier of the master batches can be polyethylene, thermoplastic polyurethane elastomer (TPU) or polyformaldehyde resin, the most preferable carrier of the master batches is polyformaldehyde resin, and the effective content of the ultra-high molecular weight silicone in the ultra-high molecular weight silicone master batches is 30-50%.
Further, the high molecular weight polyethylene glycol preferably has a number average molecular weight of 10000 to 20000. The high molecular weight polyethylene glycol acts to reduce mold fouling in the composition.
Specifically, the high molecular weight polyethylene glycol can also be used in the form of master batch, the carrier of the master batch can be low-density polyethylene, and the effective content of the high molecular weight polyethylene glycol in the high molecular weight polyethylene glycol master batch is 30-50%.
Further, the polyformaldehyde resin composition also comprises 0-1 part of an auxiliary agent.
Further, the auxiliary agent is one or more of an antioxidant, an aldehyde absorbing agent and a weather resisting agent, wherein the antioxidant comprises a main antioxidant and an auxiliary antioxidant.
Specifically, the antioxidant may be one or more of tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] pentaerythritol ester (primary antioxidant), bis [3- (1, 1-dimethylethyl) -4-hydroxy-5-methylpropanoic ] triethylene glycol (primary antioxidant), pentaerythritol tetrakis (3-laurylthiopropionate) (secondary antioxidant) and tris [2, 4-di-tert-butylphenyl ] phosphite (secondary antioxidant); the aldehyde absorbing agent can be allantoin and/or ethylene bis stearamide; the weather-resistant agent may be 2- (2H-benzotriazol-2-yl) -4, 6-bis (1-methyl-1-phenylethyl) phenol and/or poly [ [6- [ (1, 3-tetramethylbutyl) amine ] -1,3, 5-triazine-2, 4-diyl [ (2, 6-tetramethyl-4-piperidine) imine ] -1, 6-diadipy l [ (2, 6-tetramethyl-4-piperidine) imine ] ].
The invention also provides a preparation method of the polyoxymethylene resin composition, which comprises the following steps:
s1: weighing each component according to the proportion, and premixing each component to obtain a premix;
s2: and adding the premix into an extruder, and carrying out melt extrusion and granulation to obtain the polyformaldehyde resin composition.
Specifically, the extruder is a twin-screw extruder, and the temperatures of all cylinders from a feed inlet to a machine head of the twin-screw extruder are respectively as follows: 150-180 ℃, 170-220 ℃, 170-210 ℃, 170-200 ℃, 170-210 ℃, 170-220 ℃, the screw rotating speed of the double screw extruder is 250-350 r/min, the feeding amount is 50-200 kg/h, and the vacuum degree is (-0.1) -0MPa.
The invention also provides application of the polyformaldehyde resin composition in preparation of mechanical gears, bearings and daily consumer goods, and is particularly suitable for preparing parts with higher requirements on indexes such as lubricity, wear resistance and mold fouling.
Has the advantages that:
according to the invention, the ultra-high molecular weight silicone, the polytetrafluoroethylene and the high molecular weight polyethylene glycol are added into the polyformaldehyde resin, so that the friction coefficient of the material is greatly reduced, the wear resistance is improved, the material can be greatly applied to occasions with high requirements on lubricity and wear resistance, especially to the application occasions requiring the surface to be coated with the silicone oil, and the preparation method provided by the invention is simple, low in cost and high in efficiency.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
< preparation of examples and comparative examples >
The raw materials used in the examples and comparative examples of the present invention are derived from self-made or commercially available sources, but are not limited to these materials:
polyoxymethylene resin A: polyoxymethylene copolymer resin, designation POM M90-44, purchased from southbound gem;
polyoxymethylene resin B: a homo-polyoxymethylene resin, designation POM 500P, available from dupont, usa;
ultra-high molecular weight silicone a: the number average molecular weight is 100 ten thousand, chongqingbao seal cutting;
ultra-high molecular weight silicone B: the number average molecular weight is 1000 ten thousand, chongqing Bao seal character;
ultra-high molecular weight silicone C: the number average molecular weight is 50 ten thousand, chongqingbao seal cutting;
ultra-high molecular weight silicone D: the number average molecular weight is 20000 thousands, chongqingbao seal cutting;
ultra-high molecular weight silicone master batch: the effective content of the ultra-high molecular weight silicone in the master batch is 40wt%, the master batch carrier is polyformaldehyde resin, the number average molecular weight of the ultra-high molecular weight silicone in the master batch is 10000, the brand ZP-10000, and the manufacturer Chongqing Bao seal cutting is carried out;
polytetrafluoroethylene: trade designation F-5AEX R, available from Suwei;
high molecular weight polyethylene glycol a: the number average molecular weight is 8000, the trade mark PEG-8000, purchase from Guangzhou far reaching the new material;
high molecular weight polyethylene glycol B: the number average molecular weight is 10000, the trade name is PEG-10000, and the PEG-10000 is purchased from Guangzhou Yuanda new materials;
high molecular weight polyethylene glycol C: the number average molecular weight is 20000, the trade mark is PEG-20000, and the PEG-20000 is purchased from Guangzhou Dada new materials;
high molecular weight polyethylene glycol D: the number average molecular weight is 2000, the trade mark PEG-2000, purchased from Guangzhou Dada new material;
high molecular weight polyethylene glycol E: number average molecular weight 25000, designation PEG-25000, purchased from Guangzhou Yuntao New materials;
high molecular weight polyethylene glycol masterbatch: the effective content of the high molecular weight polyethylene glycol in the master batch is 40wt%, the number average molecular weight of the high molecular weight polyethylene glycol in the master batch is 20000, the master batch carrier is low density polyethylene, the brand number YBL-PEG2W, and manufacturers such as summer new materials;
main antioxidant: antioxidant 245, bis [3- (1, 1-dimethylethyl) -4-hydroxy-5-methylpropanoic acid ] triethylene glycol, commercially available, the same commercially available product was used in the parallel experiments;
auxiliary antioxidant: antioxidant 168, tris [ 2.4-di-tert-butylphenyl ] phosphite, commercially available, the same commercial product was used in the parallel experiments;
aldehyde absorbing agent: commercially available, parallel experiments used the same commercial product.
The preparation methods of the examples of the present invention and the comparative examples are as follows:
s1: weighing the components according to the proportion, and mixing the components in a high-speed mixer for 1-2 minutes to obtain a premix;
s2: and adding the premix into a double-screw extruder, and performing melt extrusion and granulation on the double-screw extruder at the temperature of 150-220 ℃ to obtain the polyformaldehyde resin composition.
Wherein, the double screw extruder is respectively to each section of thick bamboo temperature of aircraft nose by the charge door: 150 ℃, 170 ℃, 180 ℃, 190 ℃, 200 ℃, 220 ℃, the screw rotation speed is 300 r/min, the feeding amount is 100kg/h, and the vacuum degree is (-0.1) MPa.
In the present specification, the term "part(s)" means "part(s) by weight" unless otherwise specified.
< methods for Performance test >
The performance test method of each example and comparative example of the present invention is as follows:
evaluation of friction coefficient and wear resistance: (1) Friction between plastics, a plastic multifunctional friction tester, a load of 3.88N, a rotating speed of 200rpm, test time of 120min, recording a friction coefficient by equipment, and testing abrasion of a material; (2) Between plastic and metal (45 # steel), a plastic multifunctional friction tester with a load of 10N, a rotating speed of 500rpm and a test time of 120min, recording a friction coefficient by equipment, and testing the abrasion of a material;
mold fouling: the sample was continuously injection-molded into 200 molds in an injection molding machine at 230 ℃ and the collected mold deposit was weighed to observe the mold deposit on the surface of the mold.
TABLE 1 EXAMPLES 1-13 formulations
TABLE 2 Performance test results for examples 1-13
TABLE 3 comparative examples 1-8 formulations
TABLE 4 Performance test results for comparative examples 1-8
Comparative examples 1 and 2 compared with example 1, the amount of the ultra-high molecular weight silicone in comparative example 1 exceeds the lower limit, so that the friction coefficient between plastics and metals in comparative example 1 are increased, and the abrasion is also increased; the use of the ultra-high molecular weight silicone in comparative example 2 exceeded the upper limit, resulting in the generation of mold deposit and occurrence of a slip phenomenon during processing in comparative example 2.
Comparative example 3 compared to example 1, no addition of polytetrafluoroethylene resulted in an increase in the coefficient of friction between the plastic and the metal and increased wear of comparative example 3.
Comparative examples 4, 5 in comparison with example 1, the amount of polytetrafluoroethylene in comparative example 4 exceeded the lower limit, resulting in an increase in the coefficient of friction between plastics and metal and an increase in wear of comparative example 4; the use of polytetrafluoroethylene in comparative example 5 exceeded the upper limit, resulting in increased abrasion of comparative example 5, slight mold deposit, and poor processability.
Comparative example 6 in comparison to example 1, the absence of high molecular weight polyethylene glycol in the formulation resulted in increased abrasion of comparative example 6 and no processability.
Comparative examples 7 and 8 compared with example 1, the use of the high molecular weight polyethylene glycol in an excessive amount resulted in increased abrasion and mold deposit in comparative examples 7 and 8, and no processability.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. The polyformaldehyde resin composition is characterized by comprising the following components in parts by weight:
2. the polyoxymethylene resin composition of claim 1, wherein the polyoxymethylene resin is a copolyoxymethylene resin and/or a homopolyxymethylene resin.
3. The polyoxymethylene resin composition of claim 1, wherein the ultra-high molecular weight silicone has a number average molecular weight of 100 ten thousand or more, preferably 100 to 1000 ten thousand.
4. The polyoxymethylene resin composition of claim 1, wherein the high molecular weight polyethylene glycol has a number average molecular weight of 8000 to 22000.
5. The polyoxymethylene resin composition of claim 4, wherein the high molecular weight polyethylene glycol has a molecular weight of 10000 to 20000.
6. The polyoxymethylene resin composition of claim 1, further comprising 0 to 1 part of an auxiliary.
7. The polyoxymethylene resin composition of claim 6, wherein the auxiliary is one or more of an antioxidant, an aldehyde absorbing agent, and a weather resistant agent.
8. A method for producing the polyoxymethylene resin composition according to any one of claims 1 to 7, comprising the steps of:
s1: weighing the components according to the proportion, and premixing the components to obtain a premix;
s2: and adding the premix into an extruder, and carrying out melt extrusion and granulation to obtain the polyformaldehyde resin composition.
9. Use of the polyoxymethylene resin composition of any one of claims 1 to 7 for manufacturing mechanical gears, bearings and consumer goods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211201241.3A CN115536978A (en) | 2022-09-29 | 2022-09-29 | Polyformaldehyde resin composition and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211201241.3A CN115536978A (en) | 2022-09-29 | 2022-09-29 | Polyformaldehyde resin composition and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115536978A true CN115536978A (en) | 2022-12-30 |
Family
ID=84731206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211201241.3A Pending CN115536978A (en) | 2022-09-29 | 2022-09-29 | Polyformaldehyde resin composition and preparation method and application thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN115536978A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1420142A (en) * | 2001-11-16 | 2003-05-28 | 三菱瓦斯化学株式会社 | Polyformaldehyde resin composition and moulded articles thereof |
| JP2006160790A (en) * | 2004-12-02 | 2006-06-22 | Asahi Kasei Chemicals Corp | Sliding part for optical disc |
| US20080234413A1 (en) * | 2007-03-20 | 2008-09-25 | Kenichi Shinohara | Polyacetal resin composition |
| DE102008055840A1 (en) * | 2008-11-04 | 2010-05-12 | Ticona Gmbh | Composition, useful as molding parts of any type e.g. toothed wheels, gears, transport chains and rotary latches for car locks, comprises non-crosslinked ultra high molecular weight siloxane, silicone oil and polyoxymethylene polymer |
| JP2016148132A (en) * | 2015-02-13 | 2016-08-18 | 東レ株式会社 | Antistatic polyester fiber, polyester composition for antistatic fiber and manufacturing method of fiber consisting of the same |
| KR20170009401A (en) * | 2015-07-17 | 2017-01-25 | 한국엔지니어링플라스틱 주식회사 | Polyoxymethylene composition using laser making |
-
2022
- 2022-09-29 CN CN202211201241.3A patent/CN115536978A/en active Pending
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| JP2006160790A (en) * | 2004-12-02 | 2006-06-22 | Asahi Kasei Chemicals Corp | Sliding part for optical disc |
| US20080234413A1 (en) * | 2007-03-20 | 2008-09-25 | Kenichi Shinohara | Polyacetal resin composition |
| DE102008055840A1 (en) * | 2008-11-04 | 2010-05-12 | Ticona Gmbh | Composition, useful as molding parts of any type e.g. toothed wheels, gears, transport chains and rotary latches for car locks, comprises non-crosslinked ultra high molecular weight siloxane, silicone oil and polyoxymethylene polymer |
| JP2016148132A (en) * | 2015-02-13 | 2016-08-18 | 東レ株式会社 | Antistatic polyester fiber, polyester composition for antistatic fiber and manufacturing method of fiber consisting of the same |
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| Title |
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