CN105965748A - Polytetrafluoroethylene film manufacturing process - Google Patents
Polytetrafluoroethylene film manufacturing process Download PDFInfo
- Publication number
- CN105965748A CN105965748A CN201610391697.9A CN201610391697A CN105965748A CN 105965748 A CN105965748 A CN 105965748A CN 201610391697 A CN201610391697 A CN 201610391697A CN 105965748 A CN105965748 A CN 105965748A
- Authority
- CN
- China
- Prior art keywords
- film
- degrees celsius
- cooling
- polytetrafluoroethylene
- pigment
- 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.)
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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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/003—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor characterised by the choice of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/006—Pressing and sintering powders, granules or fibres
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
- B29C43/24—Calendering
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/52—Heating or cooling
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/58—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/58—Measuring, controlling or regulating
- B29C2043/5808—Measuring, controlling or regulating pressure or compressing force
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/58—Measuring, controlling or regulating
- B29C2043/5816—Measuring, controlling or regulating temperature
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a polytetrafluoroethylene film manufacturing process. The process comprises the following steps: raw materials are selected; polytetrafluoroethylene resins are mixed with pigment; a mixture is dried, molded through compression, sintered and cooled; a cooled film is shaped through blowing, and is turned by a turning mode; a calendered film is compounded on various base materials; and the film is wound. The polytetrafluoroethylene film manufacturing process is compact in process flow design; and the produced product can satisfy industrial product demands.
Description
Technical field
The present invention relates to fluorine plastic product manufacture field, particularly relate to a kind of polytetrafluoroethylene film processing technology.
Background technology
Polytetrafluoroethylene film has high chemical stability, low-friction coefficient, high-low temperature resistant, high-temperature resistant reaches 260 degrees Celsius, anti-aging, polytetrafluoroethylene film is commonly called as King, degerming, dedusting sector application is extensive, anti-SARS clothing main material uses politef to make, at chemical industry, oil, the fields such as pharmacy, politef is commonly used to make sealing member, packing ring, pad and packing material, in electric capacity industry, fluorine plastic film is also widely used, all of strong acid can be born, reducing agent and the effect of various organic solvent, polytetrafluoroethylene film has the characteristic that reactance voltage intensity is best in current material.
The equipment volume that traditional mode of production polytetrafluoroethylene film needs is big, takes up room big, and technique is loaded down with trivial details, to this end, the invention provides a kind of polytetrafluoroethylene film processing technology, flow scheme design is compact, and the goods of production disclosure satisfy that industrial requirement.
Summary of the invention
The technical problem that present invention mainly solves is to provide a kind of polytetrafluoroethylene film processing technology, it is possible to meeting polytetrafluoroethylene film processing request, can make finished product is the various ways such as perforated membrane, micro-filtration membrane, colour film.
Described a kind of polytetrafluoroethylene film processing technology, comprises the steps:
The first step: the selection of raw material, polytetrafluoroethylene film selects suspension polymerisation polyflon, require that particle diameter is at below 150um, make colorful film, the color pigment selected possesses heat resistance, strong coloring force, the pigment stable to chemical reagent, particular product, adds the fillers such as glass fibre, carbon fiber, graphite, bronze powder.
Second step: polyflon and pigment mixing, mix homogeneously after suspension injecting tetrafluoroethylene resin adds a certain amount of coloring agent.
3rd step: be dried the compound in second step, removes solvent so that material ripening.
4th step: compression molding, compression molding, rationally it is chosen to type hydraulic machine and mould, material is extrusion forming in mould cavity, and forcing press thrust is typically chosen 20 MPA to 40MPA, a kind of anti-case of optimization technique, hydraulic press uses Bidirectional-pressure mode to suppress so that material is mixed into material base.And the centre bore at blank is pressed into special core rod.
5th step: sintering, the blank of 8 the 4th steps is sintered in being placed on sintering furnace, it is sintered to cylinder blank, a kind of optimal technical scheme, sintering uses intermittent mode, first, preformed blank is heated to 330 degrees Celsius, rise temperature control 30 degrees Celsius per hour to 70 degrees Celsius per hour between, cohesion becomes the idiosome of definite shape；Next is heated to 370 degrees Celsius to 380 degrees Celsius, is incubated 3 hours.
6th step: cooling, after having sintered, carries out cooling process, and by pigment and polyflon heat conductivity, the coefficient of expansion is inconsistent, and therefore rate of cooling wants slow, and cooling is within 20 degrees Celsius per hour speed.
7th step: the thin film of cooling is carried out blowing mould sizing.
8th step: the film rolling semi-directional film in the 7th step, rolling temperature is different along with film thickness, and calendering multiple is between 2 to 3 times, and uses vertical drawing and horizontal pull-mode, and semi-directional film is stretched.
9th step: use turning mode, uses turning the film of cooling.
Tenth step: the film after calendering is compounded on various base material, such as polyester felt, PET, PP non-woven fabrics etc..
11st step: thin film crimps, uses winder rolling, under the conditions of 20 to 30 DEG C, and curling packing.
The invention has the beneficial effects as follows: one polytetrafluoroethylene film processing technology of the present invention, technical flow design is compact, and the product of production disclosure satisfy that the demand of industrialization product.
Detailed description of the invention
Below presently preferred embodiments of the present invention is described in detail, so that advantages and features of the invention can be easier to be readily appreciated by one skilled in the art, thus protection scope of the present invention is made apparent clear and definite defining.
The embodiment of the present invention includes:
Described a kind of polytetrafluoroethylene film processing technology, comprises the steps:
The first step: the selection of raw material, polytetrafluoroethylene film selects suspension polymerisation polyflon, require that particle diameter is at below 150um, make colorful film, the color pigment selected possesses heat resistance, strong coloring force, the pigment stable to chemical reagent, particular product, adds the fillers such as glass fibre, carbon fiber, graphite, bronze powder.
Second step: polyflon and pigment mixing, mix homogeneously after suspension injecting tetrafluoroethylene resin adds a certain amount of coloring agent.
3rd step: be dried the compound in second step, removes solvent so that material ripening.
4th step: compression molding, compression molding, rationally it is chosen to type hydraulic machine and mould, material is extrusion forming in mould cavity, forcing press thrust is typically chosen 20 MPA to 40MPA, a kind of anti-case of optimization technique, and hydraulic press uses Bidirectional-pressure mode to suppress, material is made to be mixed into material base, and at the centre bore press-in special core rod of blank.
5th step: sintering, the blank of 8 the 4th steps is sintered in being placed on sintering furnace, it is sintered to cylinder blank, a kind of optimal technical scheme, sintering uses intermittent mode, first, preformed blank is heated to 330 degrees Celsius, rise temperature control 30 degrees Celsius per hour to 70 degrees Celsius per hour between, cohesion becomes the idiosome of definite shape；Next is heated to 370 degrees Celsius to 380 degrees Celsius, is incubated 3 hours.
6th step: cooling, after having sintered, carries out cooling process, and by pigment and polyflon heat conductivity, the coefficient of expansion is inconsistent, and therefore rate of cooling wants slow, and cooling is within 20 degrees Celsius per hour speed.
7th step: the thin film of cooling is carried out blowing mould sizing.
8th step: the film rolling semi-directional film in the 7th step, rolling temperature is different along with film thickness, and calendering multiple is between 2 to 3 times, and uses vertical drawing and horizontal pull-mode, and semi-directional film is stretched.
9th step: use turning mode, uses turning the film of cooling.
Tenth step: the film after calendering is compounded on various base material, such as polyester felt, PET, PP non-woven fabrics etc..
11st step: thin film crimps, uses winder rolling, under the conditions of 20 to 30 DEG C, and curling packing.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the invention content to be made or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, the most in like manner it is included in the scope of patent protection of the present invention.
Claims (3)
1. a polytetrafluoroethylene film processing technology, it is characterised in that including: following steps:
The first step: the selection of raw material, polytetrafluoroethylene film selects suspension polymerisation polyflon, it is desirable to particle diameter, at below 150um, makes colorful film, and the color pigment of selection possesses heat resistance, strong coloring force, the pigment stable to chemical reagent；
Second step: polyflon and pigment mixing, mix homogeneously after suspension injecting tetrafluoroethylene resin adds a certain amount of coloring agent；
3rd step: be dried the compound in second step, removes solvent so that material ripening；
4th step: compression molding, is rationally chosen to type hydraulic machine and mould, and material is extrusion forming in mould cavity, and forcing press thrust is typically chosen 20 MPA to 40MPA；
5th step: sintering, is sintered in the blank of the 4th step is placed on sintering furnace, is sintered to cylinder blank；
6th step: cooling, after having sintered, carries out cooling process, and by pigment and polyflon heat conductivity, the coefficient of expansion is inconsistent, and therefore rate of cooling wants slow, and cooling is within 20 degrees Celsius per hour speed；
7th step: the thin film of cooling is carried out blowing mould sizing；
8th step: the film rolling semi-directional film in the 7th step, rolling temperature is different along with film thickness, and calendering multiple is between 2 to 3 times, and uses vertical drawing and horizontal pull-mode, and semi-directional film is stretched；
9th step: use turning mode, uses turning the film of cooling；
Tenth step: the film after calendering is compounded on various base material；
11st step: thin film crimps, uses winder rolling, under the conditions of 20 to 30 DEG C, and curling packing.
A kind of polytetrafluoroethylene film processing technology the most according to claim 1, it is characterised in that in the 4th described step, hydraulic press uses Bidirectional-pressure mode to suppress so that material is mixed into material base, and at the centre bore press-in special core rod of blank.
A kind of polytetrafluoroethylene film processing technology the most according to claim 1, it is characterized in that, in the 5th described step, sintering uses intermittent mode, first, preformed blank is heated to 330 degrees Celsius, rise temperature control 30 degrees Celsius per hour to 70 degrees Celsius per hour between, cohesion becomes the idiosome of definite shape, and next is heated to 370 degrees Celsius to 380 degrees Celsius, is incubated 3 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610391697.9A CN105965748A (en) | 2016-06-06 | 2016-06-06 | Polytetrafluoroethylene film manufacturing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610391697.9A CN105965748A (en) | 2016-06-06 | 2016-06-06 | Polytetrafluoroethylene film manufacturing process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105965748A true CN105965748A (en) | 2016-09-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610391697.9A Pending CN105965748A (en) | 2016-06-06 | 2016-06-06 | Polytetrafluoroethylene film manufacturing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105965748A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108773088A (en) * | 2018-05-18 | 2018-11-09 | 浙江德清科赛塑料制品有限公司 | A kind of polytetrafluoroethylene (PTFE) preservative film and preparation method thereof with self-cleaning function |
| CN111013396A (en) * | 2019-11-08 | 2020-04-17 | 芜湖成德龙过滤设备有限公司 | Polytetrafluoroethylene filter membrane production line |
| CN112091245A (en) * | 2019-06-18 | 2020-12-18 | 浙江德清科赛塑料制品有限公司 | Preheating treatment process for turning PTFE (Polytetrafluoroethylene) lathe blank |
-
2016
- 2016-06-06 CN CN201610391697.9A patent/CN105965748A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108773088A (en) * | 2018-05-18 | 2018-11-09 | 浙江德清科赛塑料制品有限公司 | A kind of polytetrafluoroethylene (PTFE) preservative film and preparation method thereof with self-cleaning function |
| CN112091245A (en) * | 2019-06-18 | 2020-12-18 | 浙江德清科赛塑料制品有限公司 | Preheating treatment process for turning PTFE (Polytetrafluoroethylene) lathe blank |
| CN111013396A (en) * | 2019-11-08 | 2020-04-17 | 芜湖成德龙过滤设备有限公司 | Polytetrafluoroethylene filter membrane production line |
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Application publication date: 20160928 |