CN103286900A - Device for producing polyvinyl alcohol (PVA) films - Google Patents
Device for producing polyvinyl alcohol (PVA) films Download PDFInfo
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- CN103286900A CN103286900A CN 201210057224 CN201210057224A CN103286900A CN 103286900 A CN103286900 A CN 103286900A CN 201210057224 CN201210057224 CN 201210057224 CN 201210057224 A CN201210057224 A CN 201210057224A CN 103286900 A CN103286900 A CN 103286900A
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- polyvinyl alcohol
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Abstract
The invention discloses a device for producing polyvinyl alcohol (PVA) films. The device comprises a decoiling device, a sheet laying table, a paper storage device, a prime coat device, a prime coat drying tunnel, a prime coat cooling roller, a floating coat device, a floating coat drying tunnel, a floating coat cooling roller, a topcoat device, a topcoat drying tunnel, a topcoat cooling roller, a trimming device and a winding device, wherein the 3-5 cooling rollers are circular rollers which cling to one another and are arranged in parallel. The device has the advantages of continuously carrying out the stable production of the PVA degradable films and realizing industrialized application.
Description
Technical field
The present invention relates to a kind of processing equipment device, a kind of process units of polyvinyl alcohol film especially is provided.
Background technology
For adapting to the requirement of New Times, plastic package material is except requiring to satisfy the requirement that packaging quality and quantity etc. is improved market day by day, and its development must be to economize on resources energy savings, easy to be recycled with the back, easily dispose or easily dissolved by environment or be degraded to the starting point of technological development.Plastics package new material, new technology, new technology, new product continue to bring out, and forward high-performance, multi-functional, active adoption new raw material, new technology, widen application and directions such as plastics package and environmental protection coordinated development develop.
Polyvinyl alcohol film (PVA film), not only have than advantages such as general thin better intensity, transparency, chemically-resistant article, oil resistivity, impressionability, heat-sealable, antistatic behaviours, but also have special barrier properties for gases, fragrance protectiveness, glossiness.The most outstanding characteristics of polyvinyl alcohol film are that it has water-soluble, biodegradable characteristic.Because these properties of having of polyvinyl alcohol film, so it extensively is used to the barrier layer, embroidery film, protective articles material inner lining layer, discarded object packaging material of packing film, multilayer complex films etc.
The mode of production of existing PVA film classics is to use solution casting method production, and the product of producing by this way has surfacing, and transparency is good, and glossiness is strong, and it is few to include additive.The technology that domestic present employing solution casting method is produced the PVA film mainly contains two classes: steel band The tape casting and cylinder The tape casting.The steel band The tape casting be with PVA solution after the steel band of widely different commentaries on classics coating curtain coating, through the oven drying film forming; The cylinder The tape casting adopts carries out curtain coating at the rotary drum cylinder surface, and utilizes the inner heating, drying film of cylinder of hollow to form film.
When adopting the steel band The tape casting to produce the PVA film, owing to the wide cut steel band is difficult to accomplish the smooth of surface, make that curtain coating can not be too low with PVA solution requirement concentration, to avoid the in uneven thickness of film.The relative PVA solution of high concentration, the many defectives when causing the coating curtain coating, bubble etc. is carried in, coating not high as surface irregularity, film light brightness secretly.And when adopting the cylinder The tape casting to produce the PVA film, though can adopt the PVA solution of low concentration, because the rotary drum diameter of cylinder can not be done too greatly, the heated drying time of filming is short, and distance is short, causes that production efficiency is low, and the energy consumption of unit product value is higher.
The full great majority of existing cast film unit all are PP, PE, EVA etc. polymeric resin single or multiple lift coextrusion casting film units, can not be for the production of the water-solubility PVA cast film.At present, the water-solubility PVA cast film all is by blow moiding method production, is exactly with extrusion-blown modling behind the polyvinyl alcohol modification.It is very unstable that but this method is produced, can't serialization production, be difficult to realize industrial applications.
Summary of the invention
Technical problem to be solved by this invention is: the process units that a kind of polyvinyl alcohol film is provided.This device adopts crawler belt and oily medium warm-up mill, can realize the serialization production of water-solubility PVA degradable film.
The technical solution used in the present invention is:
A kind of process units of polyvinyl alcohol film, comprise successively the decoiling equipment that connects, sheet laying table, storage paper device, primary coat device, primary coat drying tunnel, primary coat chill roll, middle coating device, in be coated with drying tunnel, in be coated with that chill roll, face coating device, face are coated with drying tunnel, face is coated with chill roll, trimming device, wrap-up, described chill roll be 3-5 mutually near the round roller that be arranged in parallel.
Further, to be coated with drying tunnel be oven structure for described primary coat drying tunnel and face.
Further, described baking oven top setting is by fan.
The process units of polyvinyl alcohol film of the present invention, can carry out the steady production of PVA degradable film, and can according to the PVA resin raw material and difference such as water-solubility PVA viscosity adjust accordingly, thereby can serialization production, and then realize industrial applications.Small investment of the present invention, the water-soluble polyvinyl alcohol film quality of producing is good, and production cost is low, the production efficiency height.
Description of drawings
Fig. 1 is structural representation of the present invention.
The specific embodiment
Specifically describe below by the present invention of embodiment.
The device of using in the described curtain coating coating line comprise decoiling equipment 1, sheet laying table 2, storage paper device 3, primary coat device 4, primary coat drying tunnel 5, primary coat chill roll 6, middle coating device 7, in be coated with drying tunnel 8, in be coated with that chill roll 9, face coating device 10, face are coated with drying tunnel 11, face is coated with chill roll 12, side cut and wrap-up 13, release liners wrap-up 14, they connect successively.Drying tunnel adopts baking oven, and oven temperature is controlled at 100 ℃-150 ℃.
It is as follows to utilize this device to carry out the process that the PVA cast film produces: uncoiling, tension adjustment, correction, storage paper, primary coat, primary coat oven dry, primary coat cooling, in be coated with, in be coated with oven dry, in be coated with that cooling, face are coated with, face is coated with oven dry, face is coated with cooling, peel off, side cut, rolling.
Those skilled in the art will recognize that; the above-mentioned specific embodiment is exemplary; be in order to make those skilled in the art can better understand this patent content; should not be understood as the restriction to this patent protection domain; change or modify so long as disclose spiritual any being equal to of doing according to this patent, all fall into this patent protection domain.
Claims (3)
1. the process units of a polyvinyl alcohol film, comprise successively the decoiling equipment that connects, sheet laying table, storage paper device, primary coat device, primary coat drying tunnel, primary coat chill roll, middle coating device, in be coated with drying tunnel, in be coated with that chill roll, face coating device, face are coated with drying tunnel, face is coated with chill roll, trimming device, wrap-up, it is characterized in that: described chill roll be 3-5 mutually near the round roller that be arranged in parallel.
2. process units according to claim 1, it is characterized in that: it is oven structure that described primary coat drying tunnel and face are coated with drying tunnel.
3. process units according to claim 1, it is characterized in that: described baking oven top arranges by fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210057224 CN103286900A (en) | 2012-03-05 | 2012-03-05 | Device for producing polyvinyl alcohol (PVA) films |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210057224 CN103286900A (en) | 2012-03-05 | 2012-03-05 | Device for producing polyvinyl alcohol (PVA) films |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103286900A true CN103286900A (en) | 2013-09-11 |
Family
ID=49088685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210057224 Pending CN103286900A (en) | 2012-03-05 | 2012-03-05 | Device for producing polyvinyl alcohol (PVA) films |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103286900A (en) |
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2012
- 2012-03-05 CN CN 201210057224 patent/CN103286900A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| DD01 | Delivery of document by public notice |
Addressee: Shanghai Zhouli Packing Material Co., Ltd. Document name: Notification of before Expiration of Request of Examination as to Substance |
|
| DD01 | Delivery of document by public notice |
Addressee: Shanghai Zhouli Packing Material Co., Ltd. Document name: Notification that Application Deemed to be Withdrawn |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130911 |