CN104401010A - Production process of plastic films - Google Patents
Production process of plastic films Download PDFInfo
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- CN104401010A CN104401010A CN201410700717.7A CN201410700717A CN104401010A CN 104401010 A CN104401010 A CN 104401010A CN 201410700717 A CN201410700717 A CN 201410700717A CN 104401010 A CN104401010 A CN 104401010A
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Abstract
The invention discloses a production process of plastic films. The production process of the plastic films comprises the following steps: melting, namely heating and melting polymeric resin, wherein the melting temperature is 350-420 DEG C; extruding film sheets with thickness of 0.3-0.5 cm by an extruder; drawing, namely sequentially drawing the film sheets for five times in the longitudinal and horizontal directions under the action of external force by using a longitudinal drawing machine and a horizontal drawing machine so as to orderly orientate and arrange molecular chains or crystal surfaces of high polymers in a direction parallel to the film surfaces; molding, namely pressing and molding the film sheets in the vertical direction by using a pressing plate under the tensioning state; cooling, namely putting the molded film sheets in a cooling water tank, wherein the temperature of the water in the water tank is 15 DEG C. The produced plastic film has the properties of barrier property, optical property, heat resistance, cold resistance, size stability, thickness uniformity in thickness and the like, and has the characteristics of high production rate, high productivity, high efficiency and the like, and is quick in market development.
Description
Technical field
The present invention relates to film production process field, particularly a kind of production technology of plastic sheeting.
Background technology
Plastic film production process: the method for processing forming of plastic sheeting has multiple, such as, have rolling process, the tape casting, blow moulding, pulling method etc., biaxial stretching film becomes the focus that people pay close attention in recent years.From now on, biaxial tension technology will more towards features film, as future developments such as thick film stretching, thin film stretching, multi-layer co-extruded stretchings.In recent years, what adaptation packaging industry required packing material improves constantly, and various functional membrane market development is rapid.The plastic sheeting produced through biaxial tension effectively can improve the multiple performance such as tensile property (hot strength be the 3-5 of non-stretched film doubly), barrier property, optical property, heat-resisting cold resistance, dimensional stability, thickness evenness of material, and have that speed of production is fast, production capacity is large, efficiency high, market develops rapidly.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of production technology of plastic sheeting, to solve the above-mentioned multinomial defect caused in prior art.
For achieving the above object, the invention provides following technical scheme: a kind of production technology of plastic sheeting, comprises the steps:
1) melting, by polymeric resin heating and melting, melt temperature is 350-420 DEG C, is extruded the diaphragm of thickness 0.3-0.5cm by extruder;
2) stretch, during by vertical machine drawing and transverse stretching machine, under external force, successively longitudinally carry out the stretching of 5 multiples with transverse direction, thus make the strand of high polymer or crystal plane on the direction being parallel to thin film planar, carry out orientation and ordered arrangement;
3) shape, diaphragm under tension, carries out compacting-shaping by pressing plate in the vertical direction;
4) cool, the diaphragm after sizing is placed in cooling water tank, and the temperature of Water in Water Tanks is 15 DEG C.
Preferably, described polymeric resin comprises PET section, silica, calcium carbonate and barium sulfate.
Preferably, described step 2) stretch before, first carry out crystallization and dry process, adopt with crystallizing bed packed column, be furnished with dry air preparation facilities simultaneously, comprise air compressor machine, molecular sieve moisture separator, heater, crystallization and baking temperature are at about 150-170 DEG C, and drying time is about 3.5-4 hour.
The beneficial effect of above technical scheme is adopted to be: prepare burden and mix raw material that conventional polyester film uses and mainly have light PET to cut into slices and masterbatch is cut into slices.Masterbatch section refers to that the PET containing additive cuts into slices, and additive has silica, calcium carbonate, barium sulfate, kaolin etc., corresponding masterbatch should be selected to cut into slices according to the different purposes of film.Polyester film generally adopts cutting into slices and bright chip adapted containing silicon original material of certain content, its effect is by silicon dioxide microparticle distribution in the film, increase the roughness on film surface microcosmic, a small amount of air can be held between film when making rolling, to prevent film blocking, bright chip and a certain proportion of masterbatch enter subsequent processing after cutting into slices and being mixed by measuring mixer; Crystallization and drying: the high polymer be inclined to there being moisture absorption, such as PET, PA, PC etc., before carrying out biaxial tension, must first carry out giving crystallization and dry process.One is the softening point improving polymer, avoids it in drying and melt extrudes the mutual adhesion of resin particle in process, caking; Two is remove moisture in resin, prevents the polymer containing ester group from hydrolytic degradation and generation bubble occurring melt extruding in process.
Detailed description of the invention
Describe the preferred embodiment of the present invention in detail.
The specific embodiment of the present invention: a kind of production technology of plastic sheeting, comprises the steps:
1) melting, by polymeric resin heating and melting, melt temperature is 405 DEG C, is extruded the diaphragm of thickness 0.4cm by extruder;
2) stretch, during by vertical machine drawing and transverse stretching machine, under external force, successively longitudinally carry out the stretching of 5 multiples with transverse direction, thus make the strand of high polymer or crystal plane on the direction being parallel to thin film planar, carry out orientation and ordered arrangement;
3) shape, diaphragm under tension, carries out compacting-shaping by pressing plate in the vertical direction;
4) cool, the diaphragm after sizing is placed in cooling water tank, and the temperature of Water in Water Tanks is 15 DEG C.
5) polymeric resin comprises PET section, silica, calcium carbonate and barium sulfate.
Step 2) stretch before, first carry out crystallization and dry process, adopt with crystallizing bed packed column, be furnished with dry air preparation facilities simultaneously, comprise air compressor machine, molecular sieve moisture separator, heater, crystallization and baking temperature at about 160 DEG C, about 4 hours drying times.
Prepare burden and mix raw material that conventional polyester film uses and mainly have light PET to cut into slices and masterbatch is cut into slices.Masterbatch section refers to that the PET containing additive cuts into slices, and additive has silica, calcium carbonate, barium sulfate, kaolin etc., corresponding masterbatch should be selected to cut into slices according to the different purposes of film.Polyester film generally adopts cutting into slices and bright chip adapted containing silicon original material of certain content, its effect is by silicon dioxide microparticle distribution in the film, increase the roughness on film surface microcosmic, a small amount of air can be held between film when making rolling, to prevent film blocking, bright chip and a certain proportion of masterbatch enter subsequent processing after cutting into slices and being mixed by measuring mixer; Crystallization and drying: the high polymer be inclined to there being moisture absorption, such as PET, PA, PC etc., before carrying out biaxial tension, must first carry out giving crystallization and dry process.One is the softening point improving polymer, avoids it in drying and melt extrudes the mutual adhesion of resin particle in process, caking; Two is remove moisture in resin, prevents the polymer containing ester group from hydrolytic degradation and generation bubble occurring melt extruding in process.
Above-described is only the preferred embodiment of the present invention, it should be pointed out that for the person of ordinary skill of the art, and without departing from the concept of the premise of the invention, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (3)
1. a production technology for plastic sheeting, is characterized in that: comprise the steps:
1) melting, by polymeric resin heating and melting, melt temperature is 350-420 DEG C, is extruded the diaphragm of thickness 0.3-0.5cm by extruder;
2) stretch, during by vertical machine drawing and transverse stretching machine, under external force, successively longitudinally carry out the stretching of 5 multiples with transverse direction, thus make the strand of high polymer or crystal plane on the direction being parallel to thin film planar, carry out orientation and ordered arrangement;
3) shape, diaphragm under tension, carries out compacting-shaping by pressing plate in the vertical direction;
4) cool, the diaphragm after sizing is placed in cooling water tank, and the temperature of Water in Water Tanks is 15 DEG C.
2. the production technology of plastic sheeting according to claim 1, is characterized in that: described polymeric resin comprises PET section, silica, calcium carbonate and barium sulfate.
3. the production technology of plastic sheeting according to claim 1, it is characterized in that: described step 2) stretch before, first carry out crystallization and dry process, adopt with crystallizing bed packed column, is furnished with dry air preparation facilities simultaneously, comprise air compressor machine, molecular sieve moisture separator, heater, crystallization and baking temperature are at about 150-170 DEG C, and drying time is about 3.5-4 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410700717.7A CN104401010A (en) | 2014-11-28 | 2014-11-28 | Production process of plastic films |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410700717.7A CN104401010A (en) | 2014-11-28 | 2014-11-28 | Production process of plastic films |
Publications (1)
| Publication Number | Publication Date |
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| CN104401010A true CN104401010A (en) | 2015-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410700717.7A Pending CN104401010A (en) | 2014-11-28 | 2014-11-28 | Production process of plastic films |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108656584A (en) * | 2018-05-06 | 2018-10-16 | 厦门市韬至知识产权服务有限公司 | A kind of high compound membrane preparation methods of compactness BOPET-UV |
| CN111546738A (en) * | 2020-05-29 | 2020-08-18 | 江苏鼎良电气科技有限公司 | Flame-retardant biaxially oriented polyester film and manufacturing method thereof |
| CN114103079A (en) * | 2021-11-18 | 2022-03-01 | 嘉兴逸轩新材料科技有限公司 | Preparation process of PET transfer film with high vapor permeability and moisture permeability |
Citations (5)
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|---|---|---|---|---|
| US5626703A (en) * | 1992-01-20 | 1997-05-06 | Mazda Motor Corporation | Method for preparing a liquid crystal resin composite material and molding a product from the same |
| US6114439A (en) * | 1997-04-24 | 2000-09-05 | Industrial Technology Research Institute | Crosslinkable aqueous polyester emulsion and process for preparing the same |
| CN103612396A (en) * | 2013-11-08 | 2014-03-05 | 苏州市双赢包装材料有限公司 | Production process of plastic films |
| CN103897357A (en) * | 2012-12-27 | 2014-07-02 | 天津世起科技发展有限公司 | Polyester film and manufacture method thereof |
| CN103950204A (en) * | 2014-05-15 | 2014-07-30 | 杨帆 | Production device of BOPP (Biaxially-Oriented Polypropylene) film |
-
2014
- 2014-11-28 CN CN201410700717.7A patent/CN104401010A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5626703A (en) * | 1992-01-20 | 1997-05-06 | Mazda Motor Corporation | Method for preparing a liquid crystal resin composite material and molding a product from the same |
| US6114439A (en) * | 1997-04-24 | 2000-09-05 | Industrial Technology Research Institute | Crosslinkable aqueous polyester emulsion and process for preparing the same |
| CN103897357A (en) * | 2012-12-27 | 2014-07-02 | 天津世起科技发展有限公司 | Polyester film and manufacture method thereof |
| CN103612396A (en) * | 2013-11-08 | 2014-03-05 | 苏州市双赢包装材料有限公司 | Production process of plastic films |
| CN103950204A (en) * | 2014-05-15 | 2014-07-30 | 杨帆 | Production device of BOPP (Biaxially-Oriented Polypropylene) film |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108656584A (en) * | 2018-05-06 | 2018-10-16 | 厦门市韬至知识产权服务有限公司 | A kind of high compound membrane preparation methods of compactness BOPET-UV |
| CN111546738A (en) * | 2020-05-29 | 2020-08-18 | 江苏鼎良电气科技有限公司 | Flame-retardant biaxially oriented polyester film and manufacturing method thereof |
| CN114103079A (en) * | 2021-11-18 | 2022-03-01 | 嘉兴逸轩新材料科技有限公司 | Preparation process of PET transfer film with high vapor permeability and moisture permeability |
| CN114103079B (en) * | 2021-11-18 | 2022-09-13 | 嘉兴逸轩新材料科技有限公司 | Preparation process of PET transfer film with high vapor permeability and moisture permeability |
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Application publication date: 20150311 |
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