CN111849159A - Nylon 6T composite material and preparation method thereof - Google Patents
Nylon 6T composite material and preparation method thereof Download PDFInfo
- Publication number
- CN111849159A CN111849159A CN202010813779.4A CN202010813779A CN111849159A CN 111849159 A CN111849159 A CN 111849159A CN 202010813779 A CN202010813779 A CN 202010813779A CN 111849159 A CN111849159 A CN 111849159A
- Authority
- CN
- China
- Prior art keywords
- parts
- nylon
- composite material
- coupling agent
- raw materials
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/327—Aluminium phosphate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/04—Antistatic
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention discloses a nylon 6T composite material, which is prepared from the following raw materials in parts by weight: 70-80 parts of nylon 6T, 6615-30 parts of nylon, 65-10 parts of nylon, 5-10 parts of polyethylene, 2-6 parts of propylene glycol, 10-15 parts of glass fiber, 5-10 parts of acidic alumina, 1-3 parts of nano silicon dioxide, 1-2 parts of carbon nano tube, 4-6 parts of nano titanium dioxide, 4-8 parts of coupling agent and 5-8 parts of flame retardant; the composite material has the advantages that through the selection of the raw materials in specific parts by weight, the composite material has lower melting temperature, the processing performance of the composite material is improved, the composite material is guaranteed to have excellent aging resistance and mechanical property, and meanwhile, the composite material has a certain antistatic function.
Description
Technical Field
The invention relates to the technical field of nylon materials, in particular to a nylon 6T composite material and a preparation method thereof.
Background
Nylon is a synthetic fiber, and is a term for polyamide fiber (chinlon). The appearance of nylon gives a brand-new look to textiles, the synthesis of the nylon is a major breakthrough in the synthetic fiber industry, and the semi-aromatic polyamide which is also a very important milestone in high polymer chemistry is a polyamide resin.
The semi-aromatic polyamide introduces aromatic rings into polyamide molecular chains, so that the heat resistance and the mechanical property of the material are improved, the prior board room ancestor polyamide products comprise polyamide 6T, 10T, 66 and the like, however, the melting point of the nylon 6T is 370 ℃, so that the processing is difficult, and in addition, the nylon 6T is easy to heat, oxygen and age in the using process, so that the service life of the product is influenced.
Disclosure of Invention
The invention aims to provide a nylon 6T composite material and a preparation method thereof, and the composite material has the advantages that through selection of raw materials, the composite material has a lower melting temperature, the processing performance of the composite material is improved, the composite material is guaranteed to have excellent aging resistance and mechanical properties, and meanwhile, the composite material has a certain antistatic function.
In order to achieve the above purpose of the present invention, the following technical solutions are adopted:
the invention provides a nylon 6T composite material, which is prepared from the following raw materials in parts by weight:
70-80 parts of nylon 6T, 6615-30 parts of nylon, 65-10 parts of nylon, 5-10 parts of polyethylene, 2-6 parts of propylene glycol, 10-15 parts of glass fiber, 5-10 parts of acidic alumina, 1-3 parts of nano silicon dioxide, 1-2 parts of carbon nano tube, 4-6 parts of nano titanium dioxide, 4-8 parts of coupling agent and 5-8 parts of flame retardant.
According to the composite material, through selection of the raw materials in specific parts by weight, the composite material has a lower melting temperature, the processing performance of the composite material is improved, the composite material is guaranteed to have excellent aging resistance and mechanical properties, and meanwhile, the composite material has a certain antistatic function.
Preferably, the composite material is prepared from the following raw materials in parts by weight:
nylon 6T 75 parts, nylon 6620 parts, nylon 68 parts, polyethylene 8 parts, propylene glycol 4 parts, glass fiber 12 parts, acid alumina 8 parts, nano silicon dioxide 2 parts, carbon nano tube 1.5 parts, nano titanium dioxide 5 parts, coupling agent 6 parts and flame retardant 6 parts.
Preferably, the coupling agent is a silane coupling agent; more preferably, the silane coupling agent is coupling agent KH570 and/or coupling agent KH 560. By adding the coupling agent, the interface performance of the glass fiber, the nano silicon dioxide, the carbon nano tube and the nano silicon dioxide can be better improved, the full mixing of all raw materials can be better promoted, and the improvement of the overall performance of the composite material is facilitated.
Preferably, the flame retardant is aluminum hypophosphite.
The second aspect of the present invention provides a preparation method of the above composite material, comprising the following steps:
weighing the following raw materials in parts by weight:
and mixing and stirring the raw materials uniformly, and performing melt extrusion granulation to obtain the composite material.
Preferably, the stirring speed is 600-800 r/min; the stirring temperature is 240-260 ℃; the stirring time is 20-30 min.
Preferably, the melting temperature is 290-330 ℃.
Compared with the prior art, the invention has the beneficial effects that at least:
according to the composite material, through selection of the raw materials in specific parts by weight, the composite material has a lower melting temperature, the processing performance of the composite material is improved, the composite material is guaranteed to have excellent aging resistance and mechanical properties, and meanwhile, the composite material has a certain antistatic function.
Detailed Description
The following describes embodiments of the present invention in detail with reference to the following embodiments. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains, and each raw material may be purchased.
Example 1
Composite nylon-6T material
The nylon 6T composite material is prepared from the following raw materials in parts by weight:
70 parts of nylon 6T, 6630 part of nylon, 610 parts of nylon, 5 parts of polyethylene, 6 parts of propylene glycol, 10 parts of glass fiber, 10 parts of acidic alumina, 3 parts of nano silicon dioxide, 1 part of carbon nano tube, 6 parts of nano titanium dioxide, 5604 parts of coupling agent KH and 8 parts of aluminum hypophosphite.
Second, preparation method
The preparation method of the nylon 6T composite material comprises the following steps:
weighing the following raw materials in parts by weight:
mixing the raw materials, stirring at the temperature of 260 ℃ for 20min at the speed of 600r/min, and then performing melt extrusion granulation at the temperature of 290 ℃ to obtain the nylon 6T composite material.
Example 2
Composite nylon-6T material
The nylon 6T composite material is prepared from the following raw materials in parts by weight:
nylon 6T 80 parts, nylon 6615 parts, nylon 65 parts, polyethylene 10 parts, propylene glycol 2 parts, glass fiber 15 parts, acid alumina 5 parts, nano silicon dioxide 1 part, carbon nano tube 2 parts, nano titanium dioxide 4 parts, coupling agent KH 5708 parts and aluminum hypophosphite 5 parts.
Second, preparation method
The preparation method of the nylon 6T composite material comprises the following steps:
weighing the following raw materials in parts by weight:
mixing the raw materials, stirring at 240 ℃ at 800r/min for 30min, and then performing melt extrusion granulation at 330 ℃ to obtain the nylon 6T composite material.
Example 3
Composite nylon-6T material
The nylon 6T composite material is prepared from the following raw materials in parts by weight:
nylon 6T 75 parts, nylon 6620 parts, nylon 68 parts, polyethylene 8 parts, propylene glycol 4 parts, glass fiber 12 parts, acid alumina 8 parts, nano silicon dioxide 2 parts, carbon nano tube 1.5 parts, nano titanium dioxide 5 parts, coupling agent 5706 parts and aluminum hypophosphite 6 parts.
Second, preparation method
The preparation method of the nylon 6T composite material comprises the following steps:
weighing the following raw materials in parts by weight:
mixing the raw materials, stirring at 250 ℃ for 30min at 800r/min, and then performing melt extrusion granulation at 300 ℃ to obtain the nylon 6T composite material.
Comparative example 1
The comparative example is a nylon 6T composite material, which is substantially the same as the nylon 6T composite material in example 3, except that nylon 66 in example 3 is replaced with nylon 6 of the same fraction;
the preparation method of the nylon 6T composite material is the same as that in example 3.
Comparative example 2
The comparative example is a nylon 6T composite, which is substantially the same as the nylon 6T composite in example 3, except that the polyethylene in example 3 is replaced with propylene glycol of the same fraction;
the preparation method of the nylon 6T composite material is the same as that in example 3.
Comparative example 3
The comparative example is a nylon 6T composite material, and the nylon 6T composite material is substantially the same as the nylon 6T composite material in example 3, except that the carbon nanotubes in example 3 are replaced with nano titanium dioxide of the same fraction;
the preparation method of the nylon 6T composite material is the same as that in example 3.
Comparative example 4
The comparative example is a nylon 6T composite material, and the nylon 6T composite material is substantially the same as the nylon 6T composite material in example 3, except that the acid alumina in example 3 is replaced with nano-silica in an equal fraction;
the preparation method of the nylon 6T composite material is the same as that in example 3.
Experimental example 1
Obtaining nylon 6T composite materials prepared in embodiments 1-3 and comparative examples 1-4 of the invention;
the flow rate of each nylon 6T composite material was measured according to the melt mass flow rate of GB/T3682-2000 thermoplastic, and the measurement results are shown in Table 1:
TABLE 1
As can be seen from Table 1:
the nylon 6T composite material prepared by the embodiment of the invention has excellent fluidity, is easy to process and is convenient for production of products.
Experimental example 2
Obtaining the nylon 6T composite material prepared in each embodiment and the comparative example;
the mechanical properties of the nylon 6T composite material are detected according to GB/T1040.5-2008 and GB/T9341-2008, and the detection results are shown in Table 2:
TABLE 2
| Group of | Tensile Strength (MPa) | Flexural Strength (MPa) | Heat distortion temperature (. degree. C.) |
| Example 1 | 189.7 | 206.3 | 277 |
| Example 2 | 192.5 | 201.7 | 283 |
| Example 3 | 197.4 | 213.4 | 286 |
| Comparative example 1 | 176.1 | 184.2 | 263 |
| Comparative example 2 | 184.6 | 181.9 | 253 |
| Comparative example 3 | 189.5 | 197.3 | 285 |
| Comparative example 4 | 198.9 | 215.7 | 251 |
As can be seen from Table 2:
as can be seen from the experimental data in Table 2, the nylon 6T composite material prepared in the embodiment of the invention has excellent mechanical properties and heat resistance.
Experimental example 3
Obtaining the nylon 6T composite materials prepared in the embodiments 1-3 and the comparative examples 1-4 of the invention, and preparing the composite materials into sheets with the thickness of 5 mm;
the resistivity of each material was measured using a high-precision four-probe resistivity measuring instrument (kund technologies ltd., guangzhou), and the measurement results are shown in table 3:
TABLE 3
| Group of | Resistivity (ohm cm) |
| Example 1 | 8.1×105 |
| Example 2 | 7.4×105 |
| Example 3 | 3.6×105 |
| Comparative example 1 | 4.3×105 |
| Comparative example 2 | 3.2×105 |
| Comparative example 3 | 4.8×106 |
| Comparative example 4 | 7.8×105 |
As can be seen from Table 3:
as can be seen from the experimental data in Table 3, the nylon 6T composite material prepared by the embodiment of the invention has lower resistivity and higher antistatic performance.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (8)
1. The nylon 6T composite material is characterized by being prepared from the following raw materials in parts by weight:
70-80 parts of nylon 6T, 6615-30 parts of nylon, 65-10 parts of nylon, 5-10 parts of polyethylene, 2-6 parts of propylene glycol, 10-15 parts of glass fiber, 5-10 parts of acidic alumina, 1-3 parts of nano silicon dioxide, 1-2 parts of carbon nano tube, 4-6 parts of nano titanium dioxide, 4-8 parts of coupling agent and 5-8 parts of flame retardant.
2. The composite material as claimed in claim 1, which is prepared from the following raw materials in parts by weight:
nylon 6T 75 parts, nylon 6620 parts, nylon 68 parts, polyethylene 8 parts, propylene glycol 4 parts, glass fiber 12 parts, acid alumina 8 parts, nano silicon dioxide 2 parts, carbon nano tube 1.5 parts, nano titanium dioxide 5 parts, coupling agent 6 parts and flame retardant 6 parts.
3. Composite material according to claim 1 or 2, characterized in that the coupling agent is a silane coupling agent.
4. Composite according to claim 3, characterized in that said silane coupling agent is the coupling agent KH570 and/or the coupling agent KH 560.
5. The composite material according to claim 1 or 2, characterized in that the flame retardant is aluminum hypophosphite.
6. A method of preparing a composite material as claimed in any one of claims 1 to 5, comprising the steps of:
weighing the following raw materials in parts by weight:
and mixing and stirring the raw materials uniformly, and performing melt extrusion granulation to obtain the composite material.
7. The preparation method according to claim 6, wherein the stirring speed is 600 to 800 r/min; the stirring temperature is 240-260 ℃; the stirring time is 20-30 min.
8. The method according to claim 6, wherein the melting temperature is 290 to 330 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010813779.4A CN111849159A (en) | 2020-08-13 | 2020-08-13 | Nylon 6T composite material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010813779.4A CN111849159A (en) | 2020-08-13 | 2020-08-13 | Nylon 6T composite material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111849159A true CN111849159A (en) | 2020-10-30 |
Family
ID=72968675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010813779.4A Pending CN111849159A (en) | 2020-08-13 | 2020-08-13 | Nylon 6T composite material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111849159A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113121995A (en) * | 2021-04-19 | 2021-07-16 | 江苏扬农化工集团有限公司 | Nylon composite material with wear-resisting and antistatic properties as well as preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0834881A (en) * | 1994-07-22 | 1996-02-06 | Ube Ind Ltd | Polyamide/polypropylene resin composition |
| CN102863788A (en) * | 2012-09-28 | 2013-01-09 | 合肥杰事杰新材料股份有限公司 | Low-surface-resistance high-glass-fiber reinforced flame-retardant nylon resin composition and preparation method thereof |
| CN106280421A (en) * | 2016-08-31 | 2017-01-04 | 浙江新力新材料股份有限公司 | A kind of antistatic/electroconductive nylon 6 composite and preparation method thereof |
| CN111363349A (en) * | 2020-03-27 | 2020-07-03 | 苏州禾润昌新材料有限公司 | Flame-retardant antistatic reinforced nylon composite material and preparation method thereof |
-
2020
- 2020-08-13 CN CN202010813779.4A patent/CN111849159A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0834881A (en) * | 1994-07-22 | 1996-02-06 | Ube Ind Ltd | Polyamide/polypropylene resin composition |
| CN102863788A (en) * | 2012-09-28 | 2013-01-09 | 合肥杰事杰新材料股份有限公司 | Low-surface-resistance high-glass-fiber reinforced flame-retardant nylon resin composition and preparation method thereof |
| CN106280421A (en) * | 2016-08-31 | 2017-01-04 | 浙江新力新材料股份有限公司 | A kind of antistatic/electroconductive nylon 6 composite and preparation method thereof |
| CN111363349A (en) * | 2020-03-27 | 2020-07-03 | 苏州禾润昌新材料有限公司 | Flame-retardant antistatic reinforced nylon composite material and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113121995A (en) * | 2021-04-19 | 2021-07-16 | 江苏扬农化工集团有限公司 | Nylon composite material with wear-resisting and antistatic properties as well as preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110746625B (en) | Preparation method of modified cyano resin hot-melt prepreg | |
| CN105802019A (en) | Graphene/glass fiber reinforcement polypropylene composite material and preparation method thereof | |
| CN106751379A (en) | Product prepared by a kind of fused glass pellet technique and preparation method thereof | |
| CN102504529A (en) | Halogen-free flame-retardant long glass fiber reinforced nylon 6 material and preparation method thereof | |
| CN112852157A (en) | Conductive PPS composite material with good epoxy adhesive force and preparation method thereof | |
| CN110256825A (en) | A kind of fiberglass reinforced fire retardant PET composite material and preparation method thereof | |
| CN112500571B (en) | Preparation method of bismaleimide prepreg | |
| CN105331073A (en) | Basalt fiber enhanced PC/ABS composite material and preparation method thereof | |
| CN108047712A (en) | Fire-retardant Nylon 66 composite material and preparation method thereof | |
| CN113549323A (en) | High-strength high-flow low-warpage long glass fiber reinforced polyamide composite material, and preparation method and application thereof | |
| CN111849159A (en) | Nylon 6T composite material and preparation method thereof | |
| CN103408905A (en) | PBT composite material and preparation method thereof | |
| CN115322567B (en) | Non-buckling-deformation reinforced heat-conducting nylon material and preparation method thereof | |
| CN111849163A (en) | High-performance polyphenylene sulfide/polyamide electromagnetic shielding composite material and preparation method thereof | |
| CN103509319A (en) | Glass fiber reinforced PC (Polycarbonate)/ABS (Acrylonitrile Butadiene Styrene) composite material and preparation method thereof | |
| CN106967297A (en) | High content short glass fiber enhancing polyphenyl thioether composite material and preparation method thereof | |
| CN113372647B (en) | Polypropylene compound with high-precision FDM printing performance and preparation method thereof | |
| CN110698838B (en) | Flexible conductive film based on polycarbonate and preparation method thereof | |
| CN103509343A (en) | Glass fiber reinforced polyphenylene sulfide/polyphenyl ether composite material and preparation method thereof | |
| CN111849158A (en) | High-temperature nylon composite material and preparation method thereof | |
| CN105504670A (en) | Polyether-ether-ketone composite material | |
| CN101906245B (en) | Polycarbonate-poly(arylene ether nitrile) alloy and preparation method thereof | |
| CN103205114A (en) | Preparation method of flame-retarded polyamide composite material modified by styrene-acrylonitrile copolymer | |
| CN112111118A (en) | Flexible polytetrafluoroethylene product and preparation process thereof | |
| CN111040282A (en) | High-strength high-heat-resistance polyethylene glass fiber reinforced belt and preparation 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 |