CN115008780A - Preparation method of high-adhesiveness PTFE adhesive tape - Google Patents
Preparation method of high-adhesiveness PTFE adhesive tape Download PDFInfo
- Publication number
- CN115008780A CN115008780A CN202210683549.XA CN202210683549A CN115008780A CN 115008780 A CN115008780 A CN 115008780A CN 202210683549 A CN202210683549 A CN 202210683549A CN 115008780 A CN115008780 A CN 115008780A
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- Prior art keywords
- adhesive tape
- ptfe
- component
- blank
- adhesiveness
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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
- 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
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/001—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore a shaping technique combined with cutting, e.g. in parts or slices combined with rearranging and joining the cut parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
- B29K2027/18—PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses a preparation method of a high-adhesiveness PTFE adhesive tape, belonging to the field of PTFE adhesive tape preparation; a preparation method of a high-adhesiveness PTFE adhesive tape comprises the following steps: preparing a component A and a component B as raw materials, prepressing the component A and the component B into a blank bar, pushing the blank bar into a bar, rolling the bar into a blank film, putting the rolled blank film into an oven for degreasing and longitudinally stretching to form an adhesive tape primary body, slitting and coating a coating liquid on the adhesive tape primary body, and covering the adhesive tape primary body on a dust removal filter bag sewing needle hole and a lap joint gap; wherein the component A is obtained by uniformly mixing 28 percent of M-type solvent oil and PTFE resin and then storing the mixture in a drying room; the component B is obtained by uniformly mixing 28% of M-type solvent oil, 10% of glycerol and PTFE resin and then storing the mixture in a drying room; the surface roughness of the PTFE blank membrane is increased, and the PTFE blank membrane can be tightly connected with the suture of the dedusting filter material by coating the adhesive on the surface of the PTFE blank membrane.
Description
Technical Field
The invention belongs to the field of preparation of PTFE adhesive tapes, and particularly relates to a preparation method of a high-adhesiveness PTFE adhesive tape.
Background
As one of the important structures of the bag type dust collector, the dust collection cloth bag plays a vital role in the process of filtering smoke particles in the whole dust collector; however, because the sewing positions of the bag head, the bag body and the bag bottom of the dust removal filter bag have sewing needle holes and filter material lap joints, the dust removal filter bag repeatedly filters and removes dust for a long time in the operation process of the dust remover, and dust risks to permeate or even penetrate through the needle holes and the joints of the filter bag. In order to meet the increasingly strict environmental protection requirement and reduce the risk that dust leaks from filter bag pinholes and gaps and leads to emission exceeding standard, PTFE adhesive tapes are mostly used for pasting at present to carry out leak-proof treatment on the filter bag body pinholes, but the PEFE adhesive tapes fall off in the operation of actual working conditions, and the risk that dust leaks from the pinholes exists.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a preparation method of a high-adhesiveness PTFE adhesive tape, and provides a preparation method which can prevent the PTFE adhesive tape from falling off in the actual working condition using process.
The purpose of the invention can be realized by the following technical scheme:
a preparation method of a high-adhesiveness PTFE adhesive tape is characterized by comprising the following steps:
s1: respectively preparing a component A and a component B as raw materials;
s2: prepressing the component A and the component B into a blank bar;
s3: pushing the blank bar material in the S2 into a bar material, and rolling the bar material into a blank film;
s4: putting the rolled blank film into an oven for degreasing and longitudinal stretching to form an adhesive tape primary body, and slitting;
s5: coating the adhesive liquid on the adhesive tape primary body;
wherein the component A is obtained by uniformly mixing 28 percent of M-type solvent oil and PTFE resin and then storing the mixture in a drying room; the component B is obtained by uniformly mixing 28% of M-type solvent oil, 10% of glycerol and PTFE resin and then storing the mixture in a drying room.
The invention has the beneficial effects that:
1. the PTFE blank membrane is subjected to surface modification treatment (roughening), and the surface of the PTFE blank membrane is coated with a high-temperature-resistant adhesive, so that the PTFE blank membrane can be tightly connected with a suture of a dedusting filter material;
2. the surface of the PTFE adhesive tape is subjected to roughening treatment, when the adhesive is coated, the adhesive can be collected by the groove on the surface of the adhesive tape, the adhesive can enter the needle eye in the hot pressing process, the adhesive is connected with the PTFE adhesive tape on one side and is connected with the dust removal filter bag on the other side through the plugging needle eye, a bridge effect is achieved, the PTFE adhesive tape and the dust removal filter bag can be connected together more perfectly without falling off;
3. the surface of the PTFE blank film is roughened, the treatment is simpler and more convenient, and the operation practicability is strong.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
Example 1:
the preparation method of the high-adhesiveness PTFE adhesive tape comprises the following steps:
step 1: preparing a bi-component blank film raw material;
and (2) component A: adding 28% of M-type solvent oil into PTFE resin through a V-type mixer in a mode of adding and spraying at the same time, and mixing for 25 min;
and (B) component: uniformly mixing M-type solvent oil (28%), glycerol (10%) and PTFE resin, and adding 28% of M-type solvent oil into a V-type mixer while spraying and stirring for mixing;
placing the two component raw materials in a drying room with the temperature of 50 ℃ and storing for more than 12 h;
step 2: pushing;
adding the component A and the component B into a prepressing material cylinder through a pushing press machine (a partition plate is arranged in the material cylinder, and after the two raw materials are added into the material cylinder, the partition plate is pulled out, so that the two raw materials with different components are in contact with each other at the boundary in one material cylinder, but are not fully mixed), and prepressing and maintaining the pressure of the raw materials through a prepressing rod to obtain a prepressing blank bar;
and step 3: pushing and pressing and rolling;
feeding the bar obtained in the step 2 into a pushing machine for pushing to obtain a bar with the diameter of 18mm, feeding the bi-component bar into a rolling machine for rolling to obtain a blank film with the thickness of 400 mu m and the width of 12cm, and rolling for later use;
and 4, step 4: degreasing and longitudinally drawing;
placing the rolled blank film into an oven at the temperature of 200 ℃ for deoiling and longitudinal stretching to obtain a blank film (adhesive tape primary body) with the thickness of 170 mu m and the width of 12cm, and cutting the adhesive tape primary body into required widths by a splitting machine;
and 5: gluing;
the glue coating liquid is configured by the method mentioned in the patent CN111793443B and is coated on the adhesive tape initial body; the adhesive tape is primarily coated on a sewing needle hole and an overlap joint seam of the dust removal filter bag through a coating adhesive tape machine, the thickness of the PTFE adhesive tape is 170 mu m, the width of the PTFE adhesive tape is 2.2cm, and the specific parameters of the coating adhesive tape machine are as follows: the temperature is 665 ℃, the speed of the adhesive tape is 14m/min, and the pressure is 0.64 MPa.
Example 2:
step 1: preparing a bi-component blank film raw material;
and (2) component A: adding 28% of M-type solvent oil into PTFE resin through a V-type mixer in a mode of adding and spraying at the same time, and mixing for 25 min;
and (B) component: uniformly mixing M-type solvent oil (28%), glycerol (10%) and PTFE resin, and adding 28% of M-type solvent oil into a V-type mixer while spraying and stirring for mixing;
placing the two component raw materials in a drying room with the temperature of 50 ℃ and storing for more than 12 h;
step 2: pushing;
adding the component A and the component B into a prepressing charging barrel through a pushing press machine (a partition plate is arranged in the barrel, and after the two raw materials are added into the charging barrel, the partition plate is pulled out, so that the two raw materials with different components are in a charging barrel, the boundaries are contacted, but the two raw materials are not fully mixed), and prepressing and maintaining the pressure of the raw materials through a prepressing rod to obtain a prepressing bar;
and step 3: pressing and rolling:
feeding the bar obtained in the step 2 into a pushing machine for pushing to obtain a bar with the diameter of 18mm, feeding the bi-component bar into a rolling machine for rolling to obtain a blank film with the thickness of 400 mu m and the width of 12cm, and rolling for later use;
and 4, step 4: degreasing and longitudinally drawing;
placing the rolled blank film into an oven at the temperature of 200 ℃ for deoiling and longitudinal stretching to obtain a blank film (adhesive tape primary body) with the thickness of 175 mu m and the width of 11cm, and cutting the adhesive tape primary body into required widths by a splitting machine;
and 5: gluing;
the glue coating liquid is configured by the method mentioned in the patent CN111793443B and is coated on the rubber strip initial body; covering the adhesive tape on the positions of the sewing needle holes and the lap joints of the dust-removing filter bags by using a tape covering machine, wherein the thickness of the PTFE adhesive tape is 175 mu m, the width of the PTFE adhesive tape is 2.2cm, and the specific parameters of the tape covering machine are as follows: the temperature is 665 ℃, the speed of the adhesive tape is 14m/min, and the pressure is 0.66 MPa.
Example 3:
step 1: preparing a bi-component blank film raw material;
and (2) component A: adding 28% of M-type solvent oil into PTFE resin through a V-type mixer in a mode of adding and spraying at the same time, and mixing for 25 min;
and (B) component: uniformly mixing M-type solvent oil (28%), glycerol (10%) and PTFE resin, and adding 28% of M-type solvent oil into a V-type mixer while spraying and stirring for mixing;
placing the two component raw materials in a drying room with the temperature of 50 ℃ and storing for more than 12 h;
step 2: pushing;
adding the component A and the component B into a prepressing material cylinder through a pushing press machine (a partition plate is arranged in the cylinder, and after the two raw materials are added into the material cylinder, the partition plate is pulled out, so that the two raw materials with different components are in contact with each other at the boundary in one material cylinder, but are not fully mixed), and prepressing and maintaining the pressure of the raw materials through a prepressing rod to obtain a prepressing blank bar;
and step 3: pushing and pressing and rolling;
feeding the bar obtained in the step 2 into a pushing machine for pushing to obtain a bar with the diameter of 18mm, feeding the bi-component bar into a rolling machine for rolling to obtain a blank film with the thickness of 400 mu m and the width of 12cm, and rolling for later use;
and 4, step 4: degreasing and longitudinally drawing;
placing the rolled blank film into an oven at the temperature of 200 ℃ for deoiling and longitudinal stretching to obtain a blank film (adhesive tape primary body) with the thickness of 180 mu m and the width of 10cm, and cutting the adhesive tape primary body into required widths by a splitting machine;
and 5: gluing;
the glue coating liquid is configured by the method mentioned in the patent CN111793443B and is coated on the rubber strip initial body; the adhesive tape is primarily coated on a sewing needle hole and an overlap joint seam of the dust removal filter bag through a coating adhesive tape machine, the thickness of the PTFE adhesive tape is 180 mu m, the width of the PTFE adhesive tape is 2.2cm, and the specific parameters of the coating adhesive tape machine are as follows: the temperature is 665 ℃, the speed of the adhesive tape is 14m/min, and the pressure is 0.68 MPa.
Comparative example 1:
step 1: preparing a blank film raw material;
adding 28% of M-type solvent oil into PTFE resin through a V-type mixer in a mode of adding and spraying at the same time, and mixing for 25 min; then placing the mixed raw materials in a drying room with the temperature of 50 ℃ for more than 12h to obtain mixed raw materials, and placing the raw materials in the drying room with the temperature of 50 ℃ for more than 12 h;
step 2: pushing;
adding raw materials into a prepressing charging barrel through a pushing and pressing machine, prepressing and maintaining pressure of the raw materials through a prepressing rod to obtain a prepressing blank bar;
and 3, step 3: pressing/calendering;
feeding the bar obtained in the step 2 into a pushing machine for pushing to obtain a bar with the diameter of 18mm, feeding the bar into a rolling machine for rolling to obtain a blank film with the thickness of 400 mu m and the width of 12cm, and rolling for later use;
and 4, step 4: degreasing and longitudinally drawing;
placing the rolled blank film into an oven at the temperature of 200 ℃ for deoiling and longitudinal stretching to obtain a blank film (adhesive tape primary body) with the thickness of 175 mu m and the width of 11cm, and cutting the adhesive tape primary body into required widths by a splitting machine;
and 5: gluing;
the glue coating liquid is configured by the method mentioned in the patent CN111793443B and is coated on the rubber strip initial body; covering the adhesive tape on the positions of the sewing needle holes and the lap joints of the dust-removing filter bags by using a tape covering machine, wherein the thickness of the PTFE adhesive tape is 175 mu m, the width of the PTFE adhesive tape is 2.2cm, and the specific parameters of the tape covering machine are as follows: the temperature is 665 ℃, the speed of the adhesive tape is 14m/min, and the pressure is 0.66 MPa.
The tensile strength N1 of the samples in examples 1-3 and comparative example 1 is detected according to GB/T7753, then the samples are placed in an environment at 190 ℃ for 1 hour and then immediately cooled by a fan, the tensile strength N2 of the samples is detected again, the peel strength 1 of the samples is detected according to GB/T2792, the samples are placed in an environment at 190 ℃ for 24 hours and then the peel strength 2 of the samples is detected, and the obtained results are shown in Table 1;
table 1 results of performance testing:
from the test results in table 1, the results of examples 1 to 3 are clearly superior to those of comparative example 1, while the actual results of example 2 are the best.
Modification principle:
the PTFE blank membrane is subjected to surface modification treatment (roughening), and a high-temperature-resistant adhesive is coated on the surface of the PTFE blank membrane, so that the PTFE blank membrane can be tightly connected with a dedusting filter material suture line; the principle of the PTFE blank film surface modification treatment (roughening) is as follows: the glycerol added in the component B is removed in the oil removing stage after the glycerol is mixed with the PTFE resin and the extrusion aid, so that the place occupied by the glycerol in the original PTFE mixed resin is vacated to form holes with different sizes, and the holes can store different amounts of the adhesive and are tightly adhered to the dust removal filter bag; the graining is the magnitude of the peel strength, and the larger the peel strength, the better the graining.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (10)
1. A preparation method of a high-adhesiveness PTFE adhesive tape is characterized by comprising the following steps:
s1: respectively preparing a component A and a component B as raw materials;
s2: prepressing the component A and the component B into a blank bar;
s3: pushing the blank bar material in the S2 into a bar material, and rolling the bar material into a blank film;
s4: putting the rolled blank film into an oven for degreasing and longitudinal stretching to form an adhesive tape primary body, and slitting;
s5: coating the adhesive liquid on the adhesive tape primary body;
wherein the component A is obtained by uniformly mixing 28 percent of M-type solvent oil and PTFE resin and then storing the mixture in a drying room; the component B is obtained by uniformly mixing 28% of M-type solvent oil, 10% of glycerol and PTFE resin and then storing the mixture in a drying room.
2. A method for preparing a strip of highly adherent PTFE according to claim 1, wherein during the preparation of component A, the M-type solvent oil is added to the PTFE resin by spraying while adding through a V-type blender for a mixing time of 25 min.
3. The method for preparing a highly adhesive PTFE tape according to claim 1, wherein the M-type solvent oil is added to and mixed with the other raw materials by means of a V-type blender while stirring and spraying during the preparation of component B.
4. The method for preparing a high-adhesiveness PTFE adhesive tape according to claim 1, wherein the drying room temperature is 50 ℃ and the storage time is 12 hours or more in the process of preparing the component A and the component B.
5. The method of claim 1, wherein in step S3, the diameter of the raw material rod is 18mm, and the thickness of the raw material film obtained after rolling is 400 μm and the width is 12 cm.
6. The method for preparing a high-adhesiveness PTFE tape as described in claim 5, wherein in said S4, the thickness of said tape precursor is 170-180 μm and the width is 10-12 cm.
7. The method of claim 5, wherein in S4, the thickness of the rubber strip precursor is 175 μm and the width is 11 cm.
8. The application of a PTFE adhesive tape with high adhesiveness in a dedusting filter bag.
9. The use of claim 8, wherein the adhesive tape is applied to the sewing needle holes and lap seams of the dust filter bag.
10. The application of the dust removing filter bag as claimed in claim 9, wherein the adhesive tape is primarily coated on the sewing needle holes and lap seams of the dust removing filter bag through a tape coating machine; the specific parameters of the adhesive tape covering machine are as follows: the temperature is 665 ℃, the speed of the adhesive tape is 14m/min, and the pressure is 0.64-0.68 MPa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210683549.XA CN115008780A (en) | 2022-06-16 | 2022-06-16 | Preparation method of high-adhesiveness PTFE adhesive tape |
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| CN202210683549.XA CN115008780A (en) | 2022-06-16 | 2022-06-16 | Preparation method of high-adhesiveness PTFE adhesive tape |
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