CN110947242A - Production process of polytetrafluoroethylene composite needled felt - Google Patents
Production process of polytetrafluoroethylene composite needled felt Download PDFInfo
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- CN110947242A CN110947242A CN201911364190.4A CN201911364190A CN110947242A CN 110947242 A CN110947242 A CN 110947242A CN 201911364190 A CN201911364190 A CN 201911364190A CN 110947242 A CN110947242 A CN 110947242A
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- needling
- polytetrafluoroethylene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
- B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
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- Chemical Kinetics & Catalysis (AREA)
- Nonwoven Fabrics (AREA)
- Filtering Materials (AREA)
Abstract
A production process of a polytetrafluoroethylene fiber composite needled felt mainly comprises the following steps: (1) the static electricity is eliminated, the mixture is fully loosened after being mixed with fine denier polyphenylene sulfide, and the mixture is placed for 24 hours; (2) discharging the carding machine and the lapping machine to the ground; (3) feeding the fiber into a cotton mixing bin, performing cotton mixing and scattering work, and automatically feeding the fiber into a carding machine through a leather curtain to form a laminated single-sided wool net; (4) implanting polytetrafluoroethylene cloth under the cross laminated coarse mesh formed by the cross lapping machine, and then forming a blank felt together by a roller needling machine and a pre-needling machine; (5) pricking a fiber mesh layer on the reverse side of the embryonic felt to form a base material; (6) the needle-punched substrate was heat-set using a tenter setting machine, and then subjected to an impregnation treatment with a polytetrafluoroethylene dispersion of 20%. Compared with the original pure polytetrafluoroethylene needled felt, the felt has better filtering efficiency and low resistance effect, improves the service life of blowing resistance and wear resistance, and prolongs the service life of the cloth bag.
Description
Technical Field
The invention relates to the technical field of filter material production, in particular to a production technology of a polytetrafluoroethylene composite needled felt.
Background
The filter material is a product produced by adopting a needle punching production device, and is characterized by a gradient front-back surface structure and mainly used for manufacturing a main body of a bag dust removal filter bag. The dust removing filter bag is arranged in the bag-type dust remover, dust is attached to the outer surface of the filter bag, when dust-containing gas passes through the dust remover, the dust is captured on the outer surface of the dust removing filter bag, and clean gas enters the filter bag through the filter material. The size of dust is cloth rule, minimum with naked eye invisible, and the emission requirement is more and more strict, and through the bag-type dust removal filter bag of this kind of filter material production, the gas permeable surface forms the type of falling funnel, has better filtration efficiency and low resistance effect than original pure polytetrafluoroethylene acupuncture felt, simultaneously great improvement its resistant jetting and wear-resisting life-span, prolonged the life-span of sack use.
Disclosure of Invention
The invention aims to provide a production technology of a polytetrafluoroethylene composite needled felt, which solves the technical problems.
In order to achieve the technical purpose and achieve the technical requirements, the invention adopts the technical scheme that: a production process of a polytetrafluoroethylene fiber composite needled felt mainly comprises the following steps: .
Step 1: preparing an antistatic agent liquid medicine according to the proportion of 5 percent in advance, uniformly spraying the antistatic agent liquid medicine on the polytetrafluoroethylene fibers, mixing and fully scattering the polytetrafluoroethylene fibers, and then grounding and standing for 24 hours.
Step 2: fully discharging the opening machine, the cotton box, the carding machine, the cross lapping machine and other equipment in a grounding way, and humidifying the humidity of a workshop to be more than 45%.
And step 3: and feeding the mixed fibers into a multi-bin cotton mixer, and performing mixing and scattering work for 2-4 times.
And 4, step 4: and (3) passing the mixed fibers through a carding machine, carding the fibers into tidy fibers, and cross lapping the fibers through a lapping machine to form a fleece layer, wherein the gram weight of the fleece layer is controlled to be about 250g/m 2.
And 5: and (3) implanting polytetrafluoroethylene cloth under the crossed and laminated coarse nets formed by the crossed lapping machine, and then forming a blank felt together by a roller needling machine and a pre-needling machine.
Step 6: and then reinforcing the fiber by an upper needling main needling machine and a lower needling main needling machine to form a plain felt, wherein the needling depth is 5-10mm, the needling density is controlled to be 500-700 needles/cm 2, and the drawing ratio of the fiber web is controlled to be within 5 percent.
And 7: the needle-punched substrate is heat-set using a tenter setting machine and then subjected to a dipping treatment.
As a preferred technical scheme: in the step 1, the polytetrafluoroethylene fiber is 3.5D x 61mm, the polyphenylene sulfide fiber is 2D x 51mm, and the polytetrafluoroethylene fiber and the polyphenylene sulfide fiber are mixed and fully scattered according to the proportion of 4: 1.
As a preferred technical scheme: and in the step 2, the processing workshop is sealed, the temperature is controlled to be 15-30 ℃, and the relative humidity is controlled to be 45-65%.
As a preferred technical scheme: the needling process in the step 5 comprises the following steps: pre-needling and main needling, namely pre-needling the base cloth and the single-layer wool net, then pre-needling the other surface, and finally reinforcing the main needling.
As a preferred technical scheme: and 4-8 layers of cross lapping of the lapping machine in the step 4.
As a preferred technical scheme: and 7, controlling the heat setting temperature to be 260-275 ℃, controlling the heat setting time to be 5min, and then adopting polytetrafluoroethylene dispersion liquid with the concentration of 20% to carry out dip-dyeing type dipping treatment.
The invention can produce the polytetrafluoroethylene composite needled felt, and the needled filter felt has better filtering efficiency and low resistance effect than the original pure polytetrafluoroethylene needled felt, greatly improves the service life of the polytetrafluoroethylene composite needled felt, and prolongs the service life of a cloth bag.
The specific implementation mode is as follows:
step 1: preparing an antistatic agent liquid medicine according to the proportion of 5 percent in advance, uniformly spraying the antistatic agent liquid medicine on the polytetrafluoroethylene fibers, mixing and fully scattering the polytetrafluoroethylene fibers, and then grounding and standing for 24 hours.
Step 2: fully discharging the opening machine, the cotton box, the carding machine, the cross lapping machine and other equipment in a grounding way, and humidifying the humidity of a workshop to be more than 45%.
And step 3: and feeding the mixed fibers into a multi-bin cotton mixer, and performing mixing and scattering work for 2-4 times.
And 4, step 4: and (3) passing the mixed fibers through a carding machine, carding the fibers into tidy fibers, and cross lapping the fibers through a lapping machine to form a fleece layer, wherein the gram weight of the fleece layer is controlled to be about 250g/m 2.
And 5: and (3) implanting polytetrafluoroethylene cloth under the crossed and laminated coarse nets formed by the crossed lapping machine, and then forming a blank felt together by a roller needling machine and a pre-needling machine.
Step 6: and then reinforcing the fiber by an upper needling main needling machine and a lower needling main needling machine to form a plain felt, wherein the needling depth is 5-10mm, the needling density is controlled to be 500-700 needles/cm 2, and the drawing ratio of the fiber web is controlled to be within 5 percent.
And 7: the needle-punched substrate is heat-set using a tenter setting machine and then subjected to a dipping treatment.
As a preferred technical scheme: in the step 1, the polytetrafluoroethylene fiber is 3.5D x 61mm, the polyphenylene sulfide fiber is 2D x 51mm, and the polytetrafluoroethylene fiber and the polyphenylene sulfide fiber are mixed and fully scattered according to the proportion of 4: 1. And in the step 2, the processing workshop is sealed, the temperature is controlled to be 15-30 ℃, and the relative humidity is controlled to be 45-65%. The needling process in the step 5 comprises the following steps: pre-needling and main needling, namely pre-needling the base cloth and the single-layer wool net, then pre-needling the other surface of the base cloth and the single-layer wool net, and finally reinforcing the main needling; the number of layers of the cross lapping of the lapping machine in the step 4 is 4-8, the heat setting temperature in the step 7 is controlled at 260-275 ℃, the heat setting time is 5min, and then the impregnation type dipping treatment is carried out by adopting polytetrafluoroethylene dispersion liquid with the concentration of 20%.
In the specific implementation: (1) eliminating the static electricity of the polytetrafluoroethylene fiber by using an antistatic agent, then mixing the polytetrafluoroethylene fiber with the polyphenylene sulfide fiber according to the proportion of 4:1, fully opening the mixture, and then standing for 24 hours; (2) fully grounding and discharging the carding machine and the lapping machine; (3) feeding the fiber into a cotton mixing bin, performing cotton mixing and scattering work, and automatically feeding the fiber into a carding machine through a leather curtain to form a laminated single-sided wool net; (4) implanting polytetrafluoroethylene cloth under the cross laminated coarse mesh formed by the cross lapping machine, and then forming a blank felt together by a roller needling machine and a pre-needling machine; (5) then, a fiber mesh layer is punched on the reverse side of the embryonic felt by the same method to form a base material; (6) the needle-punched substrate was heat-set using a tenter setting machine, and then subjected to an impregnation treatment with a polytetrafluoroethylene dispersion of 20%. The filter material is produced and then made into a dust removal filter bag for use. The bag-type dust-removing filter bag produced by the filter material has the advantages that the air-permeable surface forms an inverted funnel shape, the filter bag has better filtering efficiency and low resistance effect compared with the original pure polytetrafluoroethylene needled felt, the service life of the bag-type dust-removing filter bag is greatly prolonged, and the service life of the bag-type dust-removing filter bag is prolonged.
The above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, but not intended to limit the scope of the present invention, and all equivalent technical solutions also belong to the scope of the present invention, and the scope of the present invention should be defined by the claims.
Claims (6)
1. A production process of a polytetrafluoroethylene composite needled felt comprises the following steps:
step 1: preparing an antistatic agent liquid medicine according to a proportion of 5% in advance, uniformly spraying the antistatic agent liquid medicine on polytetrafluoroethylene fibers, mixing and fully scattering the polytetrafluoroethylene fibers, and then grounding and standing for 24 hours;
step 2: fully grounding and discharging equipment such as an opener, a cotton box, a carding machine, a cross lapping machine and the like, and humidifying the humidity of a workshop to be more than 45%;
and step 3: feeding the mixed fibers into a multi-bin cotton mixer, and performing mixing and scattering work for 2-4 times;
and 4, step 4: the mixed fibers are carded into tidy fibers through a carding machine, and the fibers are crossly lapped through a lapping machine to form a wool net layer, wherein the gram weight of the wool net layer is controlled to be about 250g/m 2;
and 5: implanting polytetrafluoroethylene cloth under the cross laminated coarse mesh formed by the cross lapping machine, and then forming a blank felt together by a roller needling machine and a pre-needling machine;
step 6: then reinforcing the fiber by an upper needling main needling machine and a lower needling main needling machine to form a plain felt, wherein the needling depth is 5-10mm, the needling density is controlled at 500-700 needles/cm 2, and the fiber web drafting ratio is controlled within 5 percent;
and 7: the needle-punched substrate is heat-set using a tenter setting machine and then subjected to a dipping treatment.
2. The production process of the polytetrafluoroethylene composite needled felt according to claim 1, which is characterized by comprising the following steps of: in the step 1, the polytetrafluoroethylene fiber is 3.5D x 61mm, the polyphenylene sulfide fiber is 2D x 51mm, and the polytetrafluoroethylene fiber and the polyphenylene sulfide fiber are mixed and fully scattered according to the proportion of 4: 1.
3. The production process of the polytetrafluoroethylene composite needled felt according to claim 1, which is characterized by comprising the following steps of: and in the step 2, the processing workshop is sealed, the temperature is controlled to be 15-30 ℃, and the relative humidity is controlled to be 45-65%.
4. The production process of the polytetrafluoroethylene composite needled felt according to claim 1, which is characterized by comprising the following steps of: the needling process in the step 5 comprises the following steps: pre-needling and main needling, namely pre-needling the base cloth and the single-layer wool net, then pre-needling the other surface, and finally reinforcing the main needling.
5. The production process of the polytetrafluoroethylene composite needled felt according to claim 1, which is characterized by comprising the following steps of: and 4-8 layers of cross lapping of the lapping machine in the step 4.
6. The production process of the polytetrafluoroethylene composite needled felt according to claim 1, which is characterized by comprising the following steps of: and 7, controlling the heat setting temperature to be 260-275 ℃, controlling the heat setting time to be 5min, and then adopting polytetrafluoroethylene dispersion liquid with the concentration of 20% to carry out dip-dyeing type dipping treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911364190.4A CN110947242A (en) | 2019-12-26 | 2019-12-26 | Production process of polytetrafluoroethylene composite needled felt |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911364190.4A CN110947242A (en) | 2019-12-26 | 2019-12-26 | Production process of polytetrafluoroethylene composite needled felt |
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| CN110947242A true CN110947242A (en) | 2020-04-03 |
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| CN201911364190.4A Withdrawn CN110947242A (en) | 2019-12-26 | 2019-12-26 | Production process of polytetrafluoroethylene composite needled felt |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111804063A (en) * | 2020-08-05 | 2020-10-23 | 山东兴国新力环保科技股份有限公司 | Preparation method of high-temperature-resistant filter material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1982523A (en) * | 2005-12-16 | 2007-06-20 | 厦门三维丝环保工业有限公司 | Production of needled filtering felt of polytef fibre |
| CN104771958A (en) * | 2015-03-25 | 2015-07-15 | 浙江华基环保科技有限公司 | Polyphenylene sulfide-polytetrafluoroethylene composite needle felt and making method thereof |
| CN109943973A (en) * | 2017-12-18 | 2019-06-28 | 广安玖源新材料有限公司 | A kind of polyphenylene sulfide and polytetrafluoroethylene (PTFE) compound spiked felt and its manufacturing method |
-
2019
- 2019-12-26 CN CN201911364190.4A patent/CN110947242A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1982523A (en) * | 2005-12-16 | 2007-06-20 | 厦门三维丝环保工业有限公司 | Production of needled filtering felt of polytef fibre |
| CN104771958A (en) * | 2015-03-25 | 2015-07-15 | 浙江华基环保科技有限公司 | Polyphenylene sulfide-polytetrafluoroethylene composite needle felt and making method thereof |
| CN109943973A (en) * | 2017-12-18 | 2019-06-28 | 广安玖源新材料有限公司 | A kind of polyphenylene sulfide and polytetrafluoroethylene (PTFE) compound spiked felt and its manufacturing method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111804063A (en) * | 2020-08-05 | 2020-10-23 | 山东兴国新力环保科技股份有限公司 | Preparation method of high-temperature-resistant filter material |
| CN111804063B (en) * | 2020-08-05 | 2022-09-09 | 山东兴国新力环保科技股份有限公司 | Preparation method of high-temperature-resistant filter material |
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Application publication date: 20200403 |