CN103509314A - Modified polyformaldehyde material - Google Patents
Modified polyformaldehyde material Download PDFInfo
- Publication number
- CN103509314A CN103509314A CN201310412518.1A CN201310412518A CN103509314A CN 103509314 A CN103509314 A CN 103509314A CN 201310412518 A CN201310412518 A CN 201310412518A CN 103509314 A CN103509314 A CN 103509314A
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- polyformaldehyde
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- polyformaldehyde material
- modified
- modified polyformaldehyde
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/58—Component parts, details or accessories; Auxiliary operations
- B29B7/72—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
- B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
- B29B7/7461—Combinations of dissimilar mixers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/88—Adding charges, i.e. additives
- B29B7/90—Fillers or reinforcements, e.g. fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/12—Making granules characterised by structure or composition
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/12—Making granules characterised by structure or composition
- B29B9/14—Making granules characterised by structure or composition fibre-reinforced
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention aims to provide a modified polyformaldehyde material for improving the shrinkability of a polyformaldehyde material and a preparation method thereof. Polyformaldehyde is a side chain-free, high-density and high-crystallinity linear polymer and has excellent overall performances, and extremely-good wear resistance and self-lubrication property as well as good resistance to oil and peroxides are realized. Polyformaldehyde is a tough and elastic material which still maintains good creep resistance, geometric stability and shock resistance even under low temperature conditions. However, polyformaldehyde is a crystalline material and hard to absorb water. Owing to the high degree of crystallinity, polyformaldehyde has a very high shrinkage rate up to 2-3.5%. For different types of reinforcement materials, the shrinkage rates are different. Therefore, the shrinkage rate of polyformaldehyde is improved by means of glass fiber reinforcement. According to the invention, the shrinkage stability of the polyformaldehyde material can be improved greatly.
Description
Technical field
The invention belongs to polyformaldehyde material production technical field, is a kind of original deficiency of polyoxymethylene of improving specifically, makes it have modified polyformaldehyde material of good shrinkage and preparation method thereof.
Background technology
Polyoxymethylene, English name: polyoxymethylene, abbreviation title POM.Its chemical formula is: CH2O.Structural formula is as follows:
Polyoxymethylene is a kind of side chain that do not have, high-density, and the linear polymer of high crystalline, has excellent over-all properties.Its wear resistance and self lubricity are also superior than most engineering plastics, have again good oil resistant, resistance to superoxide performance.Very not acidproof, not resistance to highly basic and the not radiation of resistance to solar ultraviolet, polyoxymethylene is a kind of tough and tensile resilient material, even if still have at low temperatures good creep resistance characteristic, geometrical stability and impact property.The existing homopolymer material of polyoxymethylene also has copolymer material.Homopolymer material has good ductility/strength, fatigue resistance, but is not easy to processing.Copolymer material has good thermostability, chemical stability and is easy to processing.
But no matter homopolymer material or copolymer material are all crystalline material and be difficult for absorbing moisture.The high crystallization degree of polyoxymethylene causes it to have quite high shrinking percentage, can be up to 2% ~ 3.5%.For various enhancement type material, there is different shrinking percentages.Therefore by glass, strengthen the shrinking percentage of improving polyoxymethylene.
Summary of the invention
The object of this invention is to provide a kind of inotropic modified polyformaldehyde material of polyformaldehyde material and preparation method thereof that improves.
Modified polyformaldehyde material is comprised of following weight ratio raw material:
Polyoxymethylene raw material: 70 ~ 80
Alkali free glass fibre: 20 ~ 30
Oxidation inhibitor: 1.8 ~ 2.2
Tinting material: 0.6 ~ 1.0
Ultraviolet absorbers: 8.5 ~ 9.5
Photostabilizer: 8.5 ~ 9.5
Dispersed lubricant: 0.8 ~ 1.2
Glass compatilizer: 4.5 ~ 5.5
Oxidation inhibitor of the present invention is the multipolymer of ethene-octene; Ultraviolet absorbers is Octabenzone; Dispersion agent is TAS-2A.
The preparation method of this modified polyformaldehyde material, comprises the following steps: first above-mentioned various raw materials to be dry mixed to 3-5 minute in super mixer, then be placed in twin screw extruder through melt extruding, cooling, pelletizing, packaging final prod; Wherein, twin screw extruder one district's temperature is that 90-100 ℃， 2nd district are that 150-180 ℃， 3rd district are that 200-210 ℃， 4th district are 200-205 ℃; 5th district are 190-200 ℃, and the residence time is 1-2 minute, and pressure is 10-15Mpa.
The mechanical property of gained modified polyformaldehyde material of the present invention can reach use standard, and can greatly improve the shrinkage of polyformaldehyde material, makes polyformaldehyde material improve in use safety performance.
Embodiment
Below by embodiment, the present invention is described further, and following examples are only that the present invention will be described but not it is limited.
embodiment 1:
(1) by weight score to take respectively each raw material as follows:
Polyoxymethylene raw material: 75
Alkali free glass fibre: 25
Oxidation inhibitor (multipolymer of ethene-octene): 2.0
Tinting material: 0.8
Ultraviolet absorbers (Octabenzone): 9.0
Photostabilizer: 9.0
Dispersed lubricant (TAS-2A): 1.0
Glass compatilizer: 5.0
(2) first above-mentioned various raw materials are dry mixed to 3-5 minute in super mixer, then be placed in twin screw extruder through melt extruding, cooling, pelletizing, packaging final prod; Wherein, twin screw extruder one district's temperature is that 90-100 ℃， 2nd district are that 150-180 ℃， 3rd district are that 200-210 ℃， 4th district are 200-205 ℃; 5th district are 190-200 ℃, and the residence time is 1-2 minute, and pressure is 10-15Mpa.
experimental result:
| Characteristic parameter | Testing standard | Performance index | Polyoxymethylene raw material | Polyoxymethylene+glass |
| 1 tensile strength MPa | ASTM/D 638 | / | 65 | 80 |
| 2 elongation at break % | ASTM/D 638 | / | 27 | 27 |
| 3 flexural strength MPa | ASTM/D 790 | / | 64 | 94 |
| 4 modulus in flexure MPa | ASTM/D 790 | / | 2450 | 4500 |
| 5 IZOD notched Izod impact strength J/m | ASTM/D 256 | / | 123 | 90 |
Above-mentioned experimental result shows, the shrinkage of modified polyformaldehyde material obtains very significantly improving, and all the other mechanical properties also get a promotion and improve.
embodiment 2:
(1) by weight score to take respectively each raw material as follows:
Polyoxymethylene raw material: 70
Alkali free glass fibre: 20
Oxidation inhibitor (multipolymer of ethene-octene): 1.8
Tinting material: 0.6
Ultraviolet absorbers (Octabenzone): 8.5
Photostabilizer: 8.5
Dispersed lubricant (TAS-2A): 0.8
Glass compatilizer: 4.5
(2) first above-mentioned various raw materials are dry mixed to 3-5 minute in super mixer, then be placed in twin screw extruder through melt extruding, cooling, pelletizing, packaging final prod; Wherein, twin screw extruder one district's temperature is that 90-100 ℃， 2nd district are that 150-180 ℃， 3rd district are that 200-210 ℃， 4th district are 200-205 ℃; 5th district are 190-200 ℃, and the residence time is 1-2 minute, and pressure is 10-15Mpa.
?
experimental result:
| Characteristic parameter | Testing standard | Performance index | Polyoxymethylene raw material | Polyoxymethylene+glass |
| 1 tensile strength MPa | ASTM/D 638 | / | 65 | 72 |
| 2 elongation at break % | ASTM/D 638 | / | 27 | 27 |
| 3 flexural strength MPa | ASTM/D 790 | / | 64 | 88 |
| 4 modulus in flexure MPa | ASTM/D 790 | / | 2450 | 4427 |
| 5 IZOD notched Izod impact strength J/m | ASTM/D 256 | / | 123 | 96 |
Above-mentioned test result shows, the shrinkage of polyformaldehyde material is significantly improved and improves.
embodiment 3:
(1) by weight score to take respectively each raw material as follows:
Polyoxymethylene raw material: 80
Alkali free glass fibre: 30
Oxidation inhibitor (multipolymer of ethene-octene): 2.2
Tinting material: 1.0
Ultraviolet absorbers (Octabenzone): 9.5
Photostabilizer: 9.5
Dispersed lubricant (TAS-2A): 1.2
Glass compatilizer: 5.5
(2) first above-mentioned various raw materials are dry mixed to 3-5 minute in super mixer, then be placed in twin screw extruder through melt extruding, cooling, pelletizing, packaging final prod; Wherein, twin screw extruder one district's temperature is that 90-100 ℃， 2nd district are that 150-180 ℃， 3rd district are that 200-210 ℃， 4th district are 200-205 ℃; 5th district are 190-200 ℃, and the residence time is 1-2 minute, and pressure is 10-15Mpa.
experimental result:
| Characteristic parameter | Testing standard | Performance index | Polyoxymethylene raw material | Polyoxymethylene+glass |
| 1 tensile strength MPa | ASTM/D 638 | / | 65 | 76 |
| 2 elongation at break % | ASTM/D 638 | / | 27 | 27 |
| 3 flexural strength MPa | ASTM/D 790 | / | 64 | 91 |
| 4 modulus in flexure MPa | ASTM/D 790 | / | 2450 | 4480 |
| 5 IZOD notched Izod impact strength J/m | ASTM/D 256 | / | 123 | 92 |
Above-mentioned experimental result shows, the shrinkage of polyformaldehyde material obtains comparatively significantly improving.
Above-described embodiment is of the present invention illustrating, and is not used for limiting the present invention.By above-mentioned experiment, show, wherein embodiment 1 is optimum weight percent, and the performances such as the tensile strength of the modified polyformaldehyde material of manufacturing by present method, elongation at break, flexural strength and modulus in flexure have obtained obvious improvement.
Modified polyformaldehyde material of the present invention, can overcome the unsettled deficiency of the unborn shrinkability of polyoxymethylene, and for the application of polyformaldehyde material and further popularization, tool is of great significance.Also make the proud raising of safety coefficient in use such as electronic apparatus, machinery, instrument, daily light industry, automobile, building materials.
Claims (5)
1. modified polyformaldehyde material, is characterized in that: by following weight ratio raw material, formed,
Polyoxymethylene raw material: 70 ~ 80
Alkali free glass fibre: 20 ~ 30
Oxidation inhibitor: 1.8 ~ 2.2
Tinting material: 0.6 ~ 1.0
Ultraviolet absorbers: 8.5 ~ 9.5
Photostabilizer: 8.5 ~ 9.5
Dispersed lubricant: 0.8 ~ 1.2
Glass compatilizer: 4.5 ~ 5.5.
2. modified polyformaldehyde material according to claim 1, is characterized in that: optimum weight percent raw material consists of:
Polyoxymethylene raw material: 75
Alkali free glass fibre: 25
Oxidation inhibitor: 2.0
Tinting material: 0.8
Ultraviolet absorbers: 9.0
Photostabilizer: 9.0
Dispersed lubricant: 1.0
Glass compatilizer: 5.0.
3. modified polyformaldehyde material according to claim 1, is characterized in that: the multipolymer that oxidation inhibitor of the present invention is ethene-octene; Ultraviolet absorbers is Octabenzone; Dispersion agent is TAS-2A.
4. modified polyformaldehyde material according to claim 1, it is characterized in that: preparation method is, first above-mentioned various raw materials are dry mixed to 3-5 minute in super mixer, then be placed in twin screw extruder through melt extruding, cooling, pelletizing, packaging final prod; Wherein, twin screw extruder one district's temperature is that 90-100 ℃， 2nd district are that 150-180 ℃， 3rd district are that 200-210 ℃， 4th district are 200-205 ℃; 5th district are 190-200 ℃, and the residence time is 1-2 minute, and pressure is 10-15Mpa.
5. modified polyformaldehyde material according to claim 1, it is characterized in that: its mechanical property of modified polyformaldehyde material of the present invention can reach use standard, and can greatly improve the shrinkage of polyformaldehyde material, make polyformaldehyde material improve in use safety performance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310412518.1A CN103509314A (en) | 2013-09-11 | 2013-09-11 | Modified polyformaldehyde material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310412518.1A CN103509314A (en) | 2013-09-11 | 2013-09-11 | Modified polyformaldehyde material |
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| Publication Number | Publication Date |
|---|---|
| CN103509314A true CN103509314A (en) | 2014-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310412518.1A Pending CN103509314A (en) | 2013-09-11 | 2013-09-11 | Modified polyformaldehyde material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103881289A (en) * | 2014-04-01 | 2014-06-25 | 上海材料研究所 | Modified polyformaldehyde supporting material for 3D printing and preparation method thereof |
| CN109206834A (en) * | 2017-07-04 | 2019-01-15 | 镇江市睿泽文化传播有限公司 | A kind of acetal plastic with photostability |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101130620A (en) * | 2006-08-25 | 2008-02-27 | 佛山市顺德区汉达精密电子科技有限公司 | Polyoxymethylene modified material |
| CN102329471A (en) * | 2011-06-24 | 2012-01-25 | 深圳市科聚新材料有限公司 | Fiberglass-reinforced polyformaldehyde material and preparation method thereof |
| CN102516705A (en) * | 2011-12-16 | 2012-06-27 | 唐山中浩化工有限公司 | Polyformaldehyde composition with light stability |
-
2013
- 2013-09-11 CN CN201310412518.1A patent/CN103509314A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101130620A (en) * | 2006-08-25 | 2008-02-27 | 佛山市顺德区汉达精密电子科技有限公司 | Polyoxymethylene modified material |
| CN102329471A (en) * | 2011-06-24 | 2012-01-25 | 深圳市科聚新材料有限公司 | Fiberglass-reinforced polyformaldehyde material and preparation method thereof |
| CN102516705A (en) * | 2011-12-16 | 2012-06-27 | 唐山中浩化工有限公司 | Polyformaldehyde composition with light stability |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103881289A (en) * | 2014-04-01 | 2014-06-25 | 上海材料研究所 | Modified polyformaldehyde supporting material for 3D printing and preparation method thereof |
| CN103881289B (en) * | 2014-04-01 | 2016-10-12 | 上海材料研究所 | A kind of modified polyacetal backing material that can be used for 3D printing and preparation method thereof |
| CN109206834A (en) * | 2017-07-04 | 2019-01-15 | 镇江市睿泽文化传播有限公司 | A kind of acetal plastic with photostability |
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Application publication date: 20140115 |
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