CN114672058A - Composite PTFE film rubber sucker and preparation method thereof - Google Patents
Composite PTFE film rubber sucker and preparation method thereof Download PDFInfo
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- CN114672058A CN114672058A CN202210290150.5A CN202210290150A CN114672058A CN 114672058 A CN114672058 A CN 114672058A CN 202210290150 A CN202210290150 A CN 202210290150A CN 114672058 A CN114672058 A CN 114672058A
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- ptfe film
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- rubber sucker
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- 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
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/12—Chemical modification
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- 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
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/06—Coating with compositions not containing macromolecular substances
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- 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
- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08J2327/18—Homopolymers or copolymers of tetrafluoroethylene
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Laminated Bodies (AREA)
Abstract
The invention belongs to the field of high polymer materials, and particularly relates to a composite PTFE film rubber sucker and a preparation method thereof, wherein the composite PTFE film rubber sucker comprises the following steps: (1) cleaning the PTFE film, and drying to obtain a treated film; (2) treating the treated film by using the mixed solution, and adding a binder to obtain a film to be vulcanized; the mixed solution consists of sodium, naphthenic oil and tetrahydrofuran; (3) and placing the film to be vulcanized on the rubber, and vulcanizing to obtain the composite PTFE film rubber sucker. The invention creates a processing technology for compounding the PTFE film on the surface of the rubber sucker, effectively solves the problems of abrasion, fading and temperature resistance of the rubber sucker in the using process, and has good market prospect.
Description
Technical Field
The invention belongs to the field of high polymer materials, and particularly relates to a composite PTFE film rubber sucker and a preparation method thereof.
Background
Suction cups, also known as spreaders, are one of the equipment actuators. Generally, gripping an article with suction cups is one of the least expensive methods. With the continuous development of the automation industry, the demand of the sucker is continuously increased, and meanwhile, higher performance requirements such as abrasion, fading, temperature resistance and the like are provided for the sucker.
Polytetrafluoroethylene (abbreviated as PTFE), commonly known as "plastic king", is a high molecular polymer prepared by polymerizing tetrafluoroethylene as a monomer. The polymer is white wax, translucent, excellent in heat resistance and cold resistance, and can be used at-180-260 ℃ for a long time. The material has the characteristics of non-stickiness, acid and alkali resistance, wear resistance and resistance to various organic solvents, and is almost insoluble in all solvents. Meanwhile, the polytetrafluoroethylene has the characteristic of high temperature resistance, has extremely low friction coefficient, can be used for lubricating, and becomes an ideal coating for easily cleaning the inner layer of the water pipe.
The traditional method for spraying PTFE solution to treat the surface of the rubber sucker can only be maintained for a short period of time, and the effect of maintaining PTFE on the surface of the rubber sucker for a long time cannot be realized.
The sodium naphthalene treatment solution is a treatment solution specially used for treating PTFE. The purpose is to increase the surface tension and to facilitate bonding of substrates that have surfaces that are difficult to bond.
The sodium naphthalene treatment liquid is prepared by dissolving or complexing sodium and naphthalene in equal amount in active ether such as tetrahydrofuran, ethylene glycol dimethyl ether, etc. The mechanism of modifying the PTFE surface by the sodium naphthalene treatment solution is as follows: sodium firstly transfers outer electrons to an empty orbit of naphthalene to form anion free radicals, and then forms ion pairs with Na; the naphthyl anion is transferred to the PTFE, which loses fluoride ion and forms a neutral group. These groups are then crosslinked by regenerating C-C bonds; or the group receives an electron again to form a carbanion, and then the carbanion reacts with a protic solvent to generate a C-H bond; or lose fluoride ion to form a C ═ C double bond. Therefore, sodium in the treatment solution can break the C-F bond on the PTFE surface (or a few microns from the surface), deprive F atoms, defluorinate the surface and form a carbonized layer. Infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) show that the modified PTFE surface has active groups such as a hydroxyl group, a carbonyl group, a carboxyl group and the like, thereby improving the bonding property of the PTFE surface.
Brecht et al treated PTFE with a sodium-naphthalene-tetrahydrofuran solution for 30 seconds reduced the F/C atomic ratio (which means the mass ratio) on the PTFE surface from 2 to 0.17, and introduced oxygen-containing groups (0/C atomic ratio of 0.2).
Zhengjun and the like adopt sodium-naphthalene treatment solution to carry out surface modification on the PTFE microporous membrane. The results show that: a rough treatment layer is formed on the surface of the modified PTFE film; the content of the F element on the surface of the film is obviously reduced; when the treatment solution concentration is 0.4mol/L, the treatment conditions are set, and the hydrophilicity and the adhesive property of the film are obviously improved.
Although the chemical modification method of the sodium-naphthalene complex has a good effect on the modification of the PTFE surface, the main disadvantages are that:
the surface of the treated PTFE is obviously darkened or brownish black;
secondly, a large amount of toxic waste liquid needs to be treated, and the operation danger is high.
Disclosure of Invention
The invention provides a preparation method of a composite PTFE film rubber sucker, which comprises the following steps:
(1) cleaning the PTFE film, and drying to obtain a treatment film;
(2) treating the treated film by using the mixed solution, and adding a binder to obtain a film to be vulcanized; the mixed solution consists of 20-25 parts by weight of sodium, 100-140 parts by weight of naphthenic oil and 900-1100 parts by weight of tetrahydrofuran;
(3) and placing the film to be vulcanized on the rubber, and vulcanizing to obtain the composite PTFE film rubber sucker.
Preferably, the thickness of the PTFE film is 0.1-0.3 mm.
Preferably, in the step (1), an alcohol solvent is used for washing.
Further, the alcohol solvent is one or more of absolute ethyl alcohol, methanol and glycol.
Preferably, the naphthenic oil is Nytex810 naphthenic oil.
Preferably, the adhesives are adhesive kemel 211 and adhesive kemel 411.
Preferably, in the step (3), the temperature for vulcanization is 160-180 ℃.
Preferably, in the step (3), the vulcanizing time is 8-12 min.
Preferably, in the step (3), the pressure for vulcanization is 15-20 MPa.
Preferably, in the step (3), the vulcanization is performed in a mold by using a press vulcanizer.
The invention also provides the composite PTFE film rubber sucker prepared by the preparation method.
Preferably, the naphthenic oil is Nytex810 naphthenic oil. Naphthenic oils contain more naphthenes and less n-paraffins, and naphthenic base oils have many excellent properties, such as: no wax, low pour point, good chemical compatibility, and compatibility with many chemicals, group materials, and polymers.
Further, the Nytex810 naphthenic base oil contains 11 wt% of aromatic hydrocarbons (CA), 47 wt% of paraffinic hydrocarbons (CP) and 42 wt% of naphthenic hydrocarbons (CN).
Naphthenic oil has a saturated cyclic carbon chain structure, has the characteristics of low pour point, high density, high viscosity, no toxic or side effect and the like, and a saturated branched chain is generally connected on the ring of the naphthenic oil. Because of the structure, the naphthenic oil has partial properties of both aromatic hydrocarbons and straight-chain hydrocarbons, and because the naphthenic oil is derived from natural petroleum, the naphthenic oil has the advantages of low price, reliable source and the like, the naphthenic oil can be specially used in many fields.
Naphthenic oils are a reasonable choice of several specific properties: high dissolving power; excellent low temperature performance; excellent compatibility with certain resins and polymers; good plasticization and intersolubility with rubber;
compared with the prior art, the technical scheme of the invention has the following advantages:
according to the invention, naphthenic oil is adopted to replace naphthalene in the conventional sodium naphthalene treatment fluid to treat the PTFE film to obtain the composite PTFE film rubber sucker. The naphthenic oil contains more naphthenic hydrocarbon and less normal alkane, and because of the structure, the naphthenic oil has partial properties of both aromatic hydrocarbon and straight-chain hydrocarbon, and has the advantages of low price, reliable source and the like because the naphthenic oil is derived from natural petroleum. Meanwhile, naphthenic base oils have many excellent characteristics, such as: the product has the characteristics of saturated cyclic carbon chain structure, no wax, low pour point, good chemical compatibility (compatible with a plurality of chemicals, group substances and polymers), high density, high viscosity, no toxic or side effect and the like, and a saturated branched chain is generally connected on the ring of the product.
Meanwhile, the preparation method of the composite PTFE film on the surface of the rubber sucker is adopted, so that the characteristic of darkening of the surface of the rubber sucker is improved.
Detailed Description
The present invention is further described below in conjunction with specific examples to enable those skilled in the art to better understand the present invention and to practice it, but the examples are not intended to limit the present invention.
Example 1
And cleaning the PTFE film by absolute ethyl alcohol, and drying at normal temperature. Then, the cleaned PTFE film was coated on one side with a solution containing 23mg of metallic sodium, 128mg of Nytex810 naphthenic base oil and 1000mg of tetrahydrofuran, and dried at room temperature. And (3) coating an adhesive on one side of the PTFE film, namely coating a Kelly 211 adhesive, drying at room temperature and then coating a Kernel 411 adhesive. And putting the PTFE film on the surface of the rubber, vulcanizing and molding in a mold, and keeping the temperature at 170 ℃ for 10min and the pressure at 18mPa to obtain the composite PTFE film rubber sucker.
Example 2
And cleaning the PTFE film by absolute ethyl alcohol, and drying at normal temperature. Then, the cleaned PTFE film was coated on one side with a solution containing 20mg of metallic sodium, 100mg of Nytex810 naphthenic base oil and 900mg of tetrahydrofuran, and dried at room temperature. And (3) coating an adhesive on one side of the PTFE film, namely coating a Kelly 211 adhesive, drying at room temperature and then coating a Kernel 411 adhesive. And putting the PTFE film on the surface of the rubber, vulcanizing and molding in a mold, and keeping the temperature at 160 ℃ for 8min and the pressure at 15mPa to obtain the composite PTFE film rubber sucker.
Example 3
And cleaning the PTFE film by absolute ethyl alcohol, and drying at normal temperature. Then, the cleaned PTFE film was coated on one side with a solution containing 25mg of metallic sodium, 140mg of Nytex810 naphthenic base oil and 1100mg of tetrahydrofuran, and dried at room temperature. And (3) coating an adhesive on one side of the PTFE film, namely coating a Kelly 211 adhesive, drying at room temperature and then coating a Kernel 411 adhesive. And putting the PTFE film on the surface of the rubber, vulcanizing and molding in a mold, and keeping the temperature at 180 ℃ for 12min and the pressure at 20mPa to obtain the composite PTFE film rubber sucker.
Example 4
And cleaning the PTFE film by adopting methanol, and drying at normal temperature. Then, the cleaned PTFE film was coated on one side with a solution containing 24mg of metallic sodium, 130mg of Nytex810 naphthenic base oil and 980mg of tetrahydrofuran, and dried at room temperature. And (3) coating an adhesive on one side of the PTFE film, namely coating a Kelly 211 adhesive, drying at room temperature and then coating a Kernel 411 adhesive. And putting the PTFE film on the surface of the rubber, vulcanizing and molding in a mold, and keeping the temperature at 175 ℃, the temperature for 11min and the pressure at 18mPa to obtain the composite PTFE film rubber sucker.
Example 5
And cleaning the PTFE film by adopting ethylene glycol, and drying at normal temperature. Then, the cleaned PTFE film was coated on one side with a solution containing 21mg of sodium metal, 135mg of Nytex810 naphthenic oil and 1060mg of tetrahydrofuran, and dried at room temperature. And (3) coating an adhesive on one side of the PTFE film, namely coating a Kelly 211 adhesive, drying at room temperature and then coating a Kernel 411 adhesive. And putting the PTFE film on the surface of the rubber, vulcanizing and molding in a mold, and keeping the temperature at 175 ℃, the temperature for 11min and the pressure at 18mPa to obtain the composite PTFE film rubber sucker.
Comparative example 1
And cleaning the PTFE film by absolute ethyl alcohol, and drying at normal temperature. Then, the cleaned PTFE film is coated with a solution containing 23mg of metallic sodium, 128mg of naphthalene and 1000mg of tetrahydrofuran on one side and dried at normal temperature. And (3) coating an adhesive on one side of the PTFE film, namely coating a Kelly 211 adhesive, drying at room temperature and then coating a Kernel 411 adhesive. And putting the PTFE film on the surface of the rubber, vulcanizing and molding in a mold, and keeping the temperature at 170 ℃ for 10min and the pressure at 18mPa to obtain the composite PTFE film rubber sucker.
Comparative example 2
And cleaning the PTFE film by adopting ethylene glycol, and drying at normal temperature. Then, the cleaned PTFE film is coated with a solution containing 23mg of metallic sodium, 100mg of naphthalene and 1000mg of tetrahydrofuran on one side and dried at normal temperature. And (3) coating an adhesive on one side of the PTFE film, namely coating a Kelly 211 adhesive, drying at room temperature and then coating a Kernel 411 adhesive. And putting the PTFE film on the surface of the rubber, vulcanizing and molding in a mold, and keeping the temperature at 170 ℃ for 10min and the pressure at 18mPa to obtain the composite PTFE film rubber sucker.
Comparative example 3
And cleaning the PTFE film by adopting ethylene glycol, and drying at normal temperature. Then, a solution containing 23mg of metallic sodium, 140mg of naphthalene and 1000mg of tetrahydrofuran was applied to one side of the cleaned PTFE film, and the film was dried at normal temperature. And (3) coating an adhesive on one side of the PTFE film, namely coating a Kelly 211 adhesive, drying at room temperature and then coating a Kelly 411 adhesive. And putting the PTFE film on the surface of the rubber, vulcanizing and molding in a mold, and keeping the temperature at 170 ℃ for 10min and the pressure at 18mPa to obtain the composite PTFE film rubber sucker.
Comparison of effects
The abrasion performance test is carried out by adopting GB/T9867-1988, and the density of the sample is measured according to the GB/T533 standard; the color-losing performance adopts a black wiping test, and the black wiping test is carried out by using a product and white paper; the temperature resistance is tested by adopting an aging oven at 150 ℃ for 24h and whether the PTFE film and the rubber fall off or not.
Table 1 comparison of performance testing of products in examples 1-3 and comparative example 1
| Example 1 | Example 2 | Example 3 | Comparative example 1 | |
| Abrasion Performance/cm3 | 0.02 | 0.03 | 0.02 | 0.03 |
| Color fading property | No color loss | No color loss | No color loss | No color loss |
| Temperature resistance | Without falling off | Without falling off | Without falling off | Without falling off |
| Surface of | Light brown | Light black color | Light brown | Brown black color |
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (10)
1. The preparation method of the composite PTFE film rubber suction cup is characterized by comprising the following steps:
(1) cleaning the PTFE film and then treating the PTFE film by using a mixed solution to obtain a treated film; the mixed solution consists of 20-25 parts by weight of sodium, 100-140 parts by weight of naphthenic oil and 900-1100 parts by weight of tetrahydrofuran;
(2) adding a binder into the treated film to obtain a film to be vulcanized;
(3) and placing the film to be vulcanized on the rubber, and vulcanizing to obtain the composite PTFE film rubber sucker.
2. The method for preparing the composite PTFE membrane rubber suction cup of claim 1, wherein the PTFE membrane has a thickness of 0.1 to 0.3 mm.
3. The method for preparing the composite PTFE film rubber sucker according to claim 1, wherein in the step (1), the cleaning is carried out by using an alcohol solvent.
4. The method for preparing the composite PTFE film rubber sucker according to claim 3, wherein the alcohol solvent is one or more of absolute ethyl alcohol, methanol and ethylene glycol.
5. The method of manufacturing a composite PTFE membrane rubber suction cup of claim 1, wherein said naphthenic oil is Nytex810 naphthenic oil.
6. The method of making a composite PTFE membrane rubber suction cup according to claim 1, wherein said adhesive is adhesive kemel 211 and adhesive kemel 411.
7. The method for preparing the composite PTFE film rubber sucker according to claim 1, wherein in the step (3), the temperature for vulcanization is 160-180 ℃.
8. The method for preparing the composite PTFE film rubber sucker according to claim 1, wherein in the step (3), the vulcanization time is 8-12 min.
9. The method for preparing the composite PTFE film rubber suction cup according to claim 1, wherein in the step (3), the vulcanization pressure is 15-20 MPa.
10. A composite PTFE film rubber sucker prepared by the method of any one of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210290150.5A CN114672058B (en) | 2022-03-23 | 2022-03-23 | Composite PTFE film rubber sucker and preparation method thereof |
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| CN202210290150.5A CN114672058B (en) | 2022-03-23 | 2022-03-23 | Composite PTFE film rubber sucker and preparation method thereof |
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| CN114672058A true CN114672058A (en) | 2022-06-28 |
| CN114672058B CN114672058B (en) | 2023-05-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115612143A (en) * | 2022-09-21 | 2023-01-17 | 上海应用技术大学 | PTFE heat treatment surface modification method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2386212A (en) * | 1940-01-03 | 1945-10-09 | Honorary Advisory Council Sci | Composite article and method of bonding rubber to a corrodible material |
| JPS5251480A (en) * | 1975-10-23 | 1977-04-25 | Daikin Ind Ltd | Composite material and a process for preparing it |
| CN108189525A (en) * | 2017-12-12 | 2018-06-22 | 昆明理工大学 | A kind of method for improving laminated film adhesive property |
| CN112976621A (en) * | 2021-03-15 | 2021-06-18 | 日照市恒通水处理设备有限公司 | Processing technology of PTFE composite membrane |
-
2022
- 2022-03-23 CN CN202210290150.5A patent/CN114672058B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2386212A (en) * | 1940-01-03 | 1945-10-09 | Honorary Advisory Council Sci | Composite article and method of bonding rubber to a corrodible material |
| JPS5251480A (en) * | 1975-10-23 | 1977-04-25 | Daikin Ind Ltd | Composite material and a process for preparing it |
| CN108189525A (en) * | 2017-12-12 | 2018-06-22 | 昆明理工大学 | A kind of method for improving laminated film adhesive property |
| CN112976621A (en) * | 2021-03-15 | 2021-06-18 | 日照市恒通水处理设备有限公司 | Processing technology of PTFE composite membrane |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115612143A (en) * | 2022-09-21 | 2023-01-17 | 上海应用技术大学 | PTFE heat treatment surface modification method |
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| CN114672058B (en) | 2023-05-12 |
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