WO2012109999A1

WO2012109999A1 - Processing method and related processing device for binding fluoroplastic to polyethylene terephthalate layer surface

Info

Publication number: WO2012109999A1
Application number: PCT/CN2012/071248
Authority: WO
Inventors: 李民
Original assignee: 上海海优威电子技术有限公司
Priority date: 2011-02-18
Filing date: 2012-02-17
Publication date: 2012-08-23
Also published as: CN102179934A

Abstract

The present invention relates to a processing method for binding fluoroplastic to a polyethylene terephthalate layer surface. Fluoroplastic is extruded and cast onto a polyethylene terephthalate layer surface. Both are pressed into a fixed shape. The fluoroplastic is a multilayer plastic comprising a fluoroplastic layer. The multilayer plastic is extruded and cast onto the polyethylene terephthalate layer surface by means of multilayer coextrusion. The fluoroplastic layer of the multilayer plastic is the external layer farthest from the polyethylene terephthalate layer. Each other layer is compatible with its own two neighboring layers. The plastic bound to the polyethylene terephthalate layer is highly compatible with the polyethylene terephthalate layer. The fluoroplastic is extruded and cast-coated onto the polyethylene terephthalate layer surface. The fluoroplastic and the polyethylene terephthalate layer are pressed into a fixed shape by at least two oppositely arranged shaping rolls. The present invention is smart in design, and simplifies the process, enhances binding strength, and lowers production costs. The present invention is environmentally friendly and suited for large-scale application.

Description

Processing method and related processing equipment for bonding fluoroplastics to the surface of polyethylene terephthalate layer

The invention relates to the technical field of plastic processing, in particular to the technical field of bonding between different plastic layers, in particular to a processing method and related processing equipment for bonding fluoroplastics to the surface of a polyethylene terephthalate layer. . Background technique

Multi-layer coextrusion and cast coating are two common methods of producing plastic film. Multi-layer coextrusion technology has developed rapidly in recent years and has become one of the important production methods for food packaging and pharmaceutical packaging film. At present, the common food packaging bags are basically multi-layer extrusion, such as three layers of co-extruded CPP film. It is formed into a film having a multi-layer structure by melting different plastics into the same mold and simultaneously being extruded, and the layers are bonded to each other. Due to the high production speed of the multi-layer extrusion technology and the high bonding strength between the layers of the film, the film produced by this technology is increasingly replacing the film originally produced by the composite technology. The composite technique is a method of producing a composite film by coating a glue between previously produced films and then laminating the films together. More and more composites between plastic films have been replaced by multi-layer coextrusion, which is still more used in the production of films such as paper-plastic composites, paper-aluminum composites, and aluminum-plastic composites. Cast coating is also a commonly used plastic production technique in which an extruder is used to melt a plastic and then extrude it onto a substrate. The more common substrates are aluminum sheets, non-woven fabrics, fiberglass cloths, and plastic films. However, there is no technique for combining multi-layer coextrusion and cast coating.

Fluoroplastics have good weather resistance due to fluorine content, low surface energy, self-cleaning properties, and very difficult to bond. Most of the fluoroplastics can be processed by hot melt forming. Common fluoroplastics are polyvinylidene fluoride (PVDF), ethylene-tetrafluoroethylene copolymer (ETFE), ethylene-chlorotrifluoroethylene copolymer (ECTFE), and four. Fluoroethylene-hexafluoropropylene-vinylidene fluoride copolymer (THV) and the like.

The bonding of the fluoroplastic to the polyethylene terephthalate layer is typically carried out using a composite process using a polyurethane, acrylate or epoxy binder between the two layers of plastic. The binder typically contains a solvent or water to dilute the viscosity of the binder body. The composite film obtained by the composite process generally has a bond strength of less than 8 Newtons/cm. Moreover, the binder used needs to be diluted with a large amount of solvent, so that a volatile solvent is required in the production process to make the production slow and pollute the environment.

Therefore, there is a need to provide a processing method for bonding a fluoroplastic to a surface of a polyethylene terephthalate layer, thereby encapsulating the process, enhancing the bonding strength, reducing the production cost, and being environmentally friendly. Summary of the invention

SUMMARY OF THE INVENTION The object of the present invention is to overcome the above-mentioned shortcomings of the prior art, and to provide a processing method and related processing equipment for bonding a fluoroplastic to a surface of a polyethylene terephthalate layer, which bonds the fluoroplastic to Polyethylene terephthalate layer The surface processing method is ingeniously designed, the process is consolidated, the bonding strength is enhanced, and the solvent is not used, and the process of volatilizing the solvent is not required, thereby reducing the production cost and being environmentally friendly, and is suitable for large-scale popularization and application.

In order to achieve the above object, in a first aspect of the invention, there is provided a processing method for bonding a fluoroplastic to a surface of a polyethylene terephthalate layer, characterized in that the fluoroplastic multilayer is The film was extruded and extruded onto the surface of the polyethylene terephthalate layer, and then the fluoroplastic and the polyethylene terephthalate layer (PET layer) were extrusion-shaped.

Preferably, the fluoroplastic is a multilayer plastic comprising a fluoroplastic layer, which is coextruded and extruded by a plurality of layers to the surface of the polyethylene terephthalate layer, and extruded. After casting to the surface of the polyethylene terephthalate layer, the fluoroplastic layer is located away from the outermost layer of the polyethylene terephthalate layer.

Preferably, the fluoroplastic is two to six layers of plastic, the outermost layer is a fluoroplastic layer, and the remaining layers have good compatibility with two adjacent layers, and the polyethylene terephthalate is bonded. The plastic of the ester layer has good compatibility with the polyethylene terephthalate layer.

Preferably, the fluoroplastic and the polyethylene terephthalate layer are subjected to the extrusion setting by at least two or more oppositely disposed shaping rolls.

In a second aspect of the invention, there is provided a processing apparatus for bonding a fluoroplastic to a surface of a polyethylene terephthalate layer, characterized in that it comprises a polyethylene terephthalate layer feeding member a multi-layer co-extruded member and an extruded shaped member, the multi-layer co-extruded member being located downstream of the polyethylene terephthalate layer feed member and fed with the polyethylene terephthalate layer The component is configured to cast a plurality of layers of plastic extruded from the multi-layer coextruded component into a fluoroplastic layer to the polyethylene terephthalate layer feeding member. A surface of the ethylene glycolate layer, the extrusion shaped member being located downstream of the multilayer coextruded component for squeezing the multilayer plastic and the polyethylene terephthalate layer.

Preferably, the polyethylene terephthalate layer feeding member is a polyethylene terephthalate layer unwinding device. Preferably, the multi-layer co-extruded component comprises an extrusion die and two to six extruders, each of which is connected to the extrusion die, the extrusion die and the polyterephthalic acid The glycolate layer feed member is cooperatively disposed such that the fluoroplastic extrusion member casts the extruded multilayer plastic to the surface of the polyethylene terephthalate layer through the extrusion die.

More preferably, the fluoroplastic is a multi-layer plastic comprising a fluoroplastic layer, the number of layers being two to six layers, after casting to the surface of the polyethylene terephthalate layer, the fluoroplastic layer is located Keep away from the outermost layer of the polyethylene terephthalate layer. The plastic adjacent to the polyethylene terephthalate layer is compatible with polyethylene terephthalate, and the remaining layers are compatible with the adjacent two layers.

Preferably, the extrusion-shaped member comprises at least two shaped rolls that are opposite in position.

Preferably, the processing device for bonding the fluoroplastic to the surface of the polyethylene terephthalate layer further comprises pretreatment a component, the pretreatment component being located between the polyethylene terephthalate layer feeding member and the fluoroplastic extrusion member for electrically charging the surface of the polyethylene terephthalate layer Halo, plasma, heat or flame pretreatment.

Preferably, the processing device for bonding the fluoroplastic to the surface of the polyethylene terephthalate layer further comprises a winding member, the winding member being located downstream of the extrusion shaping member, The multilayered plastic and polyethylene terephthalate layers that have been composited are collected.

The beneficial effects of the present invention are specifically as follows:

1. The method for bonding a fluoroplastic to a surface of a polyethylene terephthalate layer of the present invention is to coextrude and extrude the fluoroplastic multilayer to the polyethylene terephthalate The surface of the ester layer, and then the fluoroplastic and the polyethylene terephthalate layer are extruded and shaped, the concept is ingenious, the process is finished, the bonding strength is enhanced, the production cost is lowered, and the environment is very environmentally friendly. Suitable for large-scale promotion of applications.

2. The processing apparatus for bonding a fluoroplastic to a surface of a polyethylene terephthalate layer of the present invention comprises a polyethylene terephthalate layer feeding member, a multilayer co-extruded member, and an extruded shaped member, Thereby, the multilayered plastic extruded from the multi-layer co-extruded component is a fluoroplastic layer, and the poly-ethylene terephthalate is conveyed to the polyethylene terephthalate layer feeding member. a layer surface, and the multi-layer plastic and the polyethylene terephthalate layer are pressed and shaped by the extrusion-shaped member, the structure is clean, easy to operate, and can be assembled by using off-the-shelf components, The transformation cost is low and it is suitable for large-scale promotion and application.

3. The processing apparatus of the present invention for bonding a fluoroplastic to a surface of a polyethylene terephthalate layer may further comprise a pretreatment component for extrusion casting to a polyethylene terephthalate in a fluoroplastic. The surface of the polyethylene terephthalate layer is subjected to corona, plasma, heating or flame pretreatment on the surface of the polyethylene glycol layer to increase its surface energy, which can further enhance the fluoroplastic and polyethylene terephthalate. The bond strength of the glycol ester layer.

4. The processing apparatus of the present invention for bonding a fluoroplastic to a surface of a polyethylene terephthalate layer may further comprise a winding member located at the end of the processing device for collection The multi-layer plastic and polyethylene terephthalate layer have been compounded to facilitate operation and increase production efficiency. Brief Description of the Drawings Fig. 1 is a front elevational view showing a specific embodiment of a processing apparatus for bonding a fluoroplastic to a surface of a polyethylene terephthalate layer of the present invention. detailed description

In order to more clearly understand the technical content of the present invention, the following embodiments are specifically described.

Referring to FIG. 1, the present invention first provides a method for bonding a fluoroplastic to a surface of a polyethylene terephthalate layer. a processing method, which coextrudes and extrudes the fluoroplastic 1 to the surface of the polyethylene terephthalate layer 2 (PET layer), and then the fluoroplastic 1 and the poly The ethylene terephthalate layer 2 is extruded and shaped.

Fluoroplastics 1 can be any heat processable fluoroplastic or a mixture of fluoroplastics or fluoroplastics and other plastics. Preferably, the fluoroplastic 1 is a multilayer plastic comprising a fluoroplastic layer, which is coextruded by multiple layers and extruded onto the surface of the polyethylene terephthalate layer 2, After extrusion casting onto the surface of the polyethylene terephthalate layer, the fluoroplastic layer is located away from the outermost layer of the polyethylene terephthalate layer 2. The number of layers of the multilayer plastic may be any, preferably 2-6 layers, and the plastic adjacent to the polyethylene terephthalate layer 2 is compatible with the polyethylene terephthalate layer. The plastic adjacent to the fluoroplastic layer is compatible with the fluoroplastic layer, and the remaining layers of plastic are compatible with the adjacent layers.

Preferably, the fluoroplastic 1 is coextruded and extruded, and then coated on the surface of the polyethylene terephthalate layer 2 to effect extrusion casting to the polyethylene terephthalate. The surface of the alcohol ester layer 2.

Referring to FIG. 1 , the processing device for bonding a fluoroplastic to a surface of a polyethylene terephthalate layer provided by the present invention comprises a polyethylene terephthalate layer feeding member 4 and a multilayer coextrusion. a member 5 and an extrusion-shaped member 6, the fluoroplastic extrusion member 5 being located downstream of the polyethylene terephthalate layer feeding member 4 and fed with the polyethylene terephthalate layer The component 4 is cooperatively provided for casting the fluoroplastic 1 extruded by the multilayer coextruded component 5 to the polyethylene terephthalate delivered by the polyethylene terephthalate layer feeding member 4. On the surface of the layer 2, the extrusion-shaped member 6 is located downstream of the fluoroplastic extrusion member 5 for pressing and shaping the fluoroplastic 1 and the polyethylene terephthalate layer 2.

Extrusion shaping can be achieved by any suitable means. Preferably, the fluoroplastic 1 and the polyethylene terephthalate layer 2 are subjected to the extrusion setting by at least two shaped rolls 61, 62 disposed at opposite positions, and the shaping roll may be metal. Roll or rubber roller. Referring to FIG. 1, in a specific embodiment of the present invention, the fluoroplastic 1 and the polyethylene terephthalate layer 2 are passed through two oppositely disposed shaping rolls 61, 62, and two The mutually squeezing shaped rolls 61 and 62 are pressed and shaped to form a multilayer composite film or sheet 3, and after repeated reshaping or cooling, the formed multilayer composite film or sheet 3 can be wound or sliced. machining.

The polyethylene terephthalate layer feed member 4 can be coated with any suitable member. Referring to Fig. 1, in a specific embodiment of the present invention, the polyethylene terephthalate layer feeding member 4 is a polyethylene terephthalate layer unwinding device. To control the unwinding of the polyethylene terephthalate layer 2. It is passed gently below the outlet of the extrusion die 51 described below.

The fluoroplastic extrusion component 5 can be coated with any suitable component. Preferably, the fluoroplastic extrusion member 5 comprises an extrusion die 51 and a plurality of extruders 52, each of which is connected to the extrusion die 51, the extrusion die a 51 with the polyethylene terephthalate layer feeding member 4 so that the fluoroplastic extrusion member 5 casts the extruded fluoroplastic 1 to the polymerization through the extrusion die 51 The surface of the ethylene terephthalate layer 2. The number of extruders 52 may be any, for example, 2-6, and different molten plastics enter the extrusion die 51 through the dispenser or directly into the extrusion die 51 having a plurality of cavities, thereby extruding 2-6 layers. Multi-layer plastic. Referring to Figure 1, in a particular embodiment of the invention, the number of extruders 52 is two.

In order to improve the adhesion of the surface of the multilayer plastic and the polyethylene terephthalate layer 2, preferably, the processing device for bonding the fluoroplastic to the surface of the polyethylene terephthalate layer Also included is a pretreatment component (not shown) located between the polyethylene terephthalate layer feed component 4 and the fluoroplastic extrusion component 5 for the pairing The surface of the ethylene phthalate layer 2 is subjected to corona, plasma, heating or flame pretreatment. The pretreatment component can be, for example, a corona machine, a plasma machine, an oven, a flame processor.

In order to facilitate the collection of the final product, the processing device for bonding the fluoroplastic to the surface of the polyethylene terephthalate layer further includes a winding member (not shown), and the winding member is located at the processing device At the end, a film or sheet 3 for collecting the fluoroplastic 1 and polyethylene terephthalate layer 2 which has been compounded is used. The winding member can be, for example, a winder.

Example 1

The device consists of the following components arranged in order:

(1) Polyethylene terephthalate layer unwinding device, controlling constant speed unwinding, speed from 5 meters to 100 meters / minute;

(2) Corona machine;

(3) Two extruders 52, the diameter of the screw is 120 mm for extruding the fluoroplastic layer, and the other screw is 75 mm for extruding the adhesive resin layer, and the temperature of the fluoroplastic layer is extruded. At 240 degrees Celsius, the temperature of the extrusion bonding resin head is 200 degrees Celsius;

(4) Two extruders 52 are placed at an angular interval of 60 degrees from the unwinding direction of the polyethylene terephthalate layer 2;

(5) Two extruders 52 are connected to the distributor through a connecting rod, and the dispenser is connected to the extrusion die 51. The extrusion die 51 is located directly above the polyethylene terephthalate layer 2, and the extruded film is a multilayer plastic. The total thickness of 1 is 10 filaments;

(6) Two sets of fixed rolls 61 and 62, both of which are metal rolls, each having a diameter of 250 mm. The setting roller 62 is at a height of 60 degrees of the setting roller 61, as shown in Fig. 1;

(7) Winding machine, winding speed from 5 meters to 100 meters / minute.

After the winding, the peel strength between the fluoroplastic 1 and the polyethylene terephthalate layer 2 was measured to be 12 N/cm. Example 2

(1) Polyethylene terephthalate layer unwinding device, controlling constant speed unwinding, speed of 20 meters to 200 meters / minute; (2) oven, heating temperature is room temperature to 250 degrees Celsius; (3) Three extruders 52 having a screw diameter of 75 mm and three extruders 52 placed at an angle of 45 degrees.

(4) The materials extruded by the three extruders 52 are fluoroplastic layer/mixture layer of fluoroplastic and acrylate resin/adhesive resin layer, fluoroplastic layer extruder head temperature is 240 degrees, fluoroplastic and sticky The temperature of the extruder layer of the resin mixture is 220 degrees, and the temperature of the adhesive resin layer extruder head is 200 degrees;

(5) Three extruders 52 are directly connected to an extrusion die 51 having a multi-cavity cavity, and the extrusion die 51 is located directly above the polyethylene terephthalate layer 2, and the extruded film is the total of the multilayer plastic 1 1 wire thickness;

(6) Three shaped rolls, two metal rolls, one rubber roll. The metal roll has a diameter of 300 mm and the rubber roll has a diameter of 250 mm. The rubber roller is 15 degrees higher than the metal roller;

(7) a post-processing component such as a corona processor;

(8) Winding machine, winding speed from 20 meters to 200 meters / minute.

After the winding, the peel strength between the fluoroplastic 1 and the polyethylene terephthalate layer 2 was measured to be 20 N/cm. This embodiment adds a post-processing component-corona machine which can be constructed in the same manner as the pre-treatment component to increase the surface energy of the composite product for further use. Example 3

(1) Polyethylene terephthalate layer unwinding device, controlling constant speed unwinding, unwinding speed 10 to 300 meters; (2) Flame treatment machine;

(3) Six extruders 52, with a screw diameter of 75 mm, one extruded fluoroplastic, three extruded transition plastics, and two extruded water vapor barrier layers. Three of the six extruders 52 were placed on one platform and the other three were placed under the platform. The extruders 52 are all placed at an angle of 45 degrees.

(4) The materials extruded by the six extruders 52 are respectively a fluoroplastic layer/adhesive resin layer/nylon layer/adhesive resin layer/EVOH layer/adhesive resin layer;

(5) Six extruders 52 are connected to the dispenser, and the dispenser is connected to the extrusion die 51. The extrusion die 51 is located directly above the polyethylene terephthalate layer 2, and the extruded film is the total of the multilayer plastic 1 5 wires in thickness;

(6) Two setting rolls 61 and 62, a metal roll and a rubber roll. The metal roll has a diameter of 300 mm and the rubber roll has a diameter of 150 mm. The rubber roller is 60 degrees higher than the metal roller;

(7) Winding machine, winding speed from 10 meters to 300 meters.

After the winding, the peel strength between the fluoroplastic 1 and the polyethylene terephthalate 2 was tested and it was impossible to separate. Therefore, the processing method of the present invention for bonding a fluoroplastic to a surface of a polyethylene terephthalate layer simultaneously comprises a multilayer coextrusion and extrusion coating process by extruding the fluoroplastic to the Polyethylene terephthalate layer surface, of course Thereafter, the fluoroplastic and the polyethylene terephthalate layer (PET layer) are extrusion-shaped, thereby bonding the fluoroplastic to the surface of the polyethylene terephthalate layer, and the concept is unique and formed. The product has a high bond strength.

In summary, the processing method for bonding the fluoroplastic to the surface of the polyethylene terephthalate layer of the present invention is ingeniously designed, the process is consolidated, the bonding strength is enhanced, and the solvent is not required to be evaporated. The process, so the production cost is reduced, the production speed is increased, and it is very environmentally friendly, which is suitable for large-scale promotion and application.

In this specification, the invention has been described with reference to specific embodiments thereof. However, it will be apparent that various modifications and changes can be made without departing from the spirit and scope of the invention. Accordingly, the specification and figures are to be regarded as illustrative and not limiting.

Claims

Rights request

A processing method for bonding a fluoroplastic to a surface of a polyethylene terephthalate layer, characterized in that the fluoroplastic is coextruded and extruded by a plurality of layers to the polyparaphenylene The surface of the ethylene glycolate layer is then extruded and shaped into the fluoroplastic and the polyethylene terephthalate layer.

2 . The processing method for bonding a fluoroplastic to a surface of a polyethylene terephthalate layer according to claim 1 , wherein the fluoroplastic is a multilayer plastic comprising a fluoroplastic layer, The multilayer plastic is cast and extruded onto the surface of the polyethylene terephthalate layer by multilayer coextrusion, and after extrusion casting onto the surface of the polyethylene terephthalate layer, the fluorine The plastic layer is located away from the outermost layer of the polyethylene terephthalate layer.

3. The method for bonding a fluoroplastic to a surface of a polyethylene terephthalate layer according to claim 1, wherein the fluoroplastic is two to six layers of plastic, and the outermost layer is fluorine. The plastic layer has good compatibility with the adjacent two layers, and the plastic bonding the polyethylene terephthalate layer has good compatibility with the polyethylene terephthalate layer. Sex.

4. The method of bonding a fluoroplastic to a surface of a polyethylene terephthalate layer according to claim 1, wherein the fluoroplastic and the polyethylene terephthalate are The ester layer is formed by at least two or more oppositely disposed shaped rolls.

A processing apparatus for bonding a fluoroplastic to a surface of a polyethylene terephthalate layer, comprising: a polyethylene terephthalate layer feeding member, a multilayer co-extruded member, and a squeezing a pressure-setting member, the multi-layer co-extruded member is located downstream of the polyethylene terephthalate layer feeding member, and is disposed in cooperation with the polyethylene terephthalate layer feeding member for The multilayer plastic extruded from the outer layer of the multi-layer co-extruded component is a fluoroplastic layer cast to the surface of the polyethylene terephthalate layer conveyed by the polyethylene terephthalate layer feeding member The extrusion shaped member is located downstream of the multilayer coextruded component for squeezing the multilayer plastic and the polyethylene terephthalate layer.

6. The processing apparatus for bonding a fluoroplastic to a surface of a polyethylene terephthalate layer according to claim 5, wherein the polyethylene terephthalate layer feeding member is a polymer A polyethylene terephthalate layer unwinding device.

7. The processing apparatus for bonding a fluoroplastic to a surface of a polyethylene terephthalate layer according to claim 5, wherein the multilayer co-extruded member comprises an extrusion die and two to six An extruder, each of which is coupled to the extrusion die, the extrusion die being disposed in cooperation with the polyethylene terephthalate layer feeding member such that the multilayer co-extruded member passes the The extrusion die casts the extruded multilayer plastic to the surface of the polyethylene terephthalate layer.

8. The processing apparatus for bonding a fluoroplastic to a surface of a polyethylene terephthalate layer according to claim 5, wherein the extrusion-shaped member comprises at least two fixed rolls of opposite positions . A processing apparatus for bonding a fluoroplastic to a surface of a polyethylene terephthalate layer according to claim 5, wherein said fluoroplastic is bonded to polyethylene terephthalate The processing device of the layer surface further includes a pretreatment member between the polyethylene terephthalate layer feeding member and the multilayer coextrusion member for the polyparaphenylene The surface of the ethylene glycolate layer is subjected to corona, plasma, heat or flame pretreatment.

A processing apparatus for bonding a fluoroplastic to a surface of a polyethylene terephthalate layer according to claim 5, wherein said fluoroplastic is bonded to polyethylene terephthalate The processing apparatus of the layer surface further includes a winding member located downstream of the extrusion shaping member for collecting the multilayered plastic and polyethylene terephthalate layer that has been composited.