CN109955470A

CN109955470A - A kind of preparation method of fexible film

Info

Publication number: CN109955470A
Application number: CN201711428145.1A
Authority: CN
Inventors: 金闯
Original assignee: Taicang Sidike New Material Science and Technology Co Ltd
Current assignee: Taicang Sidike New Material Science and Technology Co Ltd
Priority date: 2017-12-26
Filing date: 2017-12-26
Publication date: 2019-07-02

Abstract

The invention discloses a kind of preparation methods of fexible film, characterized in that it comprises the following steps: squeezes out a thermoplastic resin by an extruder；And the thermoplastic resin is imprinted with a flexible die and an idler wheel mechanism, the flexible die has one first figure, to form a fexible film with a second graph.The preparation method of fexible film provided in an embodiment of the present invention, pass through the cooperation of flexible die and idler wheel mechanism, it can be in the case where not using the expensive idler wheel with pattern, produce the fexible film with high quality, not only cost reduces, and fexible film during stretching will not be different from the material of basement membrane because of design layer, and cracking occurs, deforms or falls off.

Description

A kind of preparation method of fexible film

Technical field

The present invention relates to a kind of preparation process of film, especially a kind of preparation method of fexible film.

Background technique

As the development of such as electronic products such as smart phone, tablet computer, intelligent appliance is getting faster, to fexible film Demand and day Ju increase, the bending resistance of most of engineering plastics is poor, it is easy to fracture or generate folding line.Also, in mesh Preceding consumer view packaging multiple for various product, in addition to pursuing performance, texture and personalization for product are also quite particular about. For example, the shelling machine of present electronic product must have the shell of colorful shiny surface, and the pattern having a sense of hierarchy, to meet Requirement of the user to texture.

Compared to traditional surface decorating method, such as spraying, thermal transfer, overlay film technology are compared, and in-mold transfer printing technology is Surface decoration technique in fashion at present.In the technology of in-mold transfer printing, generally there can be pattern in being arranged one in mold again Decorative layer, by printing off the pattern of user demand during ejection formation, common decorative layer, which can be selected, to be conducive to demould Flexible material.As shown in Figure 1, a kind of its manufacturing process for showing decorative layer, the basement membrane M without surface pattern processing is by idler wheel 11 roll out, and adhesive S is applied to the surface of basement membrane M by adhesive coating mechanism 12, since idler wheel 13 has the pattern to be imprinted Mirror image pattern adhesive S can be imprinted out to desired stereochemical structure pattern with pressure roller 14 and 13 mutual extrusion of idler wheel, When adhesive S solidification after, at the decorative layer M ' with pattern, finally finished product is involved in by idler wheel 15.

Normally, adhesive S is to select photosensitive resin, when pressure roller 14 and 13 mutual extrusion of idler wheel, and is pressed on adhesive S After printing off pattern, ultraviolet light is further increased, adhesive S can be solidified.However, due to the material of adhesive S and basement membrane M It is not identical, the ductility of the two also can difference, cause decorative layer M ' when the cladding for being applied to different objects stretches, in mould The design layer of ornament materials M ' is easy to produce cracking, deforms or fall off, so that yields reduces.On the other hand, the prior art In, adhesive S can also directly use material identical with basement membrane M as material, to avoid the generation of the above problem, but no matter Why is the material of adhesive S, and the idler wheel 13 with pattern used in the process of such processing procedure, cost is higher, is unfavorable for Reduce cost.

Summary of the invention

To solve existing technical problem, the embodiment of the invention provides a kind of preparation method of fexible film, energy At least solve the above-mentioned problems in the prior art.

To achieve the goals above, the preparation method of a kind of fexible film provided in an embodiment of the present invention, including following step It is rapid:

One thermoplastic resin is squeezed out by an extruder；

And the thermoplastic resin is imprinted with a flexible die and an idler wheel mechanism, the flexible die has one first figure Shape, to form a fexible film with a second graph.

Preferably, wherein the flexible die includes a graph layer and a base, first figure is set to institute State graph layer.

Preferably, wherein the material of the graph layer is photosensitive resin.

Preferably, wherein the material of the thermoplastic resin include polyvinyl chloride, polycarbonate, high density polyethylene (HDPE), Medium density polyethylene, low density polyethylene (LDPE), polypropylene, polystyrene, nylon, polymethyl methacrylate, polyurethane, poly- amino One of formic acid esters, acrylonitrile-butadiene-styrene (ABS), linear low density polyethylene or ethylene/vinyl alcohol copolymer are more Kind.

Preferably, wherein first figure and the second graph mirror image each other.

Preferably, wherein the thermoplastic resin further includes weight percent between 0.1% to 5.0% lubricant.

Preferably, wherein there are two the rollings for rolling the thermoplastic resin and the flexible die for the idler wheel mechanism tool Wheel.

Preferably, further including the following steps: the spacing of two idler wheels of adjustment, to change the thickness of the fexible film Degree.

Preferably, further including the following steps: adjustment two idler wheels surface temperature to 130 DEG C to 180 DEG C it Between.

Compared with the prior art, the preparation method of fexible film provided in an embodiment of the present invention passes through flexible die and rolling The cooperation of mechanism is taken turns, can be produced in the case where not using the expensive idler wheel with pattern with high quality Fexible film, not only cost reduces, and fexible film during stretching will not be different from the material of basement membrane because of design layer, And cracking occurs, deforms or falls off.

Detailed description of the invention

Fig. 1 is a kind of manufacturing process schematic diagram of fexible film of the prior art.

Fig. 2 is a kind of flow chart of the preparation method of fexible film of the embodiment of the present invention.

Fig. 3 is a kind of schematic diagram of the manufacturing equipment of the preparation method of fexible film according to an embodiment of the present invention.

Fig. 4 is a kind of schematic diagram of one of the preparation method of fexible film of the invention flexible die.

Fig. 5 is the schematic diagram of the fexible film in a kind of preparation method of fexible film of the invention.

Fig. 6 is a kind of schematic diagram of the manufacturing equipment of the preparation method of fexible film according to an embodiment of the present invention.

[main appended drawing reference]

11,13,15,221,222,231,232,241,61,62 ... idler wheel

12 ... adhesive coating mechanisms

14 ... pressure rollers

21 ... extruders

22 ... idler wheel mechanisms

3 ... thermoplastic resins

4 ... flexible dies

41 ... graph layers

42 ... bases

421 ... first figures

5,5a ... fexible film

51 ... second graphs

M ... basement membrane

M ' ... decorative layer

S ... adhesive

Specific embodiment

Technical solution of the present invention is further described in detail below in conjunction with attached drawing.

As described in Figure 2, fexible film produced by the preparation method of fexible film according to the present invention can not only be made For in-mold decoration (In-Mold Decoration, IMD) material of in-mold transfer printing, also can be used as when another membrane material produces Flexible die, can also be directly as the pad pasting or coating (Out-side Mold Decoration, OMD) etc. of any article Deng article covering material, or as the optical diaphragm of opto-electronics, the e.g. common brightness enhancement film of display, diffusion Film, preventing from scraping film or anti-reflective film.For example, fexible film 5 can be used as decorative layer, such as be turned pattern by in-mold transfer printing It is printed on the products such as luggage case, the casing of laptop, the dorsal shield of mobile phone, Portable electronic product outer casing or any appearance member Surface can also be used as the surface that coated fertilizer is directly attached at the said goods in a manner of pad pasting or coating, and make above-mentioned The surface of product not only has the pattern of stereochemical structure, and product can also be allowed to obtain the scratch resistant protection in surface.Wherein, pattern can be Arbitrarily devised two dimension or d pattern, e.g. hair line, lenticule, mosaic or other geometrical patterns.

In preferred embodiment provided by the invention, the production method of fexible film includes step S01 and S02.For convenience Understand, it is shown referring to figure 3..

In step S01, a thermoplastic resin 3 is squeezed out by an extruder 21, wherein the material of thermoplastic resin 3 is for example Being includes polyvinyl chloride (Polyvinyl Chloride, PVC), polycarbonate (Poly Carbonate, PC), high-density polyethylene Alkene (high density polyethylene, HDPE), medium density polyethylene (Medium Density Polyethylene, MDPE), low density polyethylene (LDPE) (low density polyethylene, LDPE), polypropylene (Polypropylene, PP), poly- Styrene (Polystyrene, PS), nylon (Nylon), polymethyl methacrylate (Polymethylmethacrylate, PMMA), polyurethane (polyurethanes, PU), polyurethanes (thermoplastic polyurethanes, TPU), Acrylonitrile-butadiene-styrene (ABS) (Acrylonitrile Butadiene Styrene, ABS), linear low density polyethylene (Linear Low Density Polyethylene, LLDPE) or ethylene/vinyl alcohol copolymer (Ethylene vinyl Alcohol, EVOH) one of or it is a variety of, naturally it is also possible to be other any the technical field of the invention technical staff institutes Well known any thermoplastic resin, the present invention are not limited to such implementation.In addition, extruder can be skill belonging to the present invention Any type known to the technical staff of art field.In the present embodiment, thermoplastic resin 3 is by taking polycarbonate as an example, via crowded Machine be squeezed out by extruder 21 after heating at the polycarbonate of molten condition (flowable state) out, it is more acurrate for be by squeezing The extruder head (T-die) of machine 21 squeezes out out, to carry out subsequent step.

In step S02, thermoplastic resin 3 is imprinted with a flexible die 4 and an idler wheel mechanism 22, flexible die 4 has one First figure 421, to form a fexible film 5 with a second graph 51.As shown in figure 3, idler wheel mechanism 22 may include two A adjacent rollers 221,222 have a spacing between idler wheel 221,222.In the present embodiment, at least partly flexible mold 4 is to set It is placed between idler wheel 221,222, more specifically, flexible die 4 is sent out by an idler wheel 231, by idler wheel 221,222 Between after, then packed up by another idler wheel 232, to recycle or reuse flexible die 4.In this, the first figure 421 and the second figure Shape 51 can have different designs for three-dimensional micro-structure, practical pattern according to demand.

In the present embodiment, for accurate, idler wheel mechanism 22 and extruder head come under some of extruder 21, but squeeze out Component included by machine 21 is not limited only to this.

As shown in figure 4, it is a kind of schematic diagram of the flexible die used in the preparation method of fexible film of the invention, Such as it can be part (such as circular dashed line region a) enlarged drawing of flexible die 4 in Fig. 3.In the present embodiment, flexible die 4 It may include a graph layer 41 and a base 42, wherein the first figure 421 is positioned at the surface of graph layer 41.For example, base 42 material may include polycarbonate (Poly Carbonate, PC), polyterephthalic acid ethane diacid ester (Polyethylene Terephthalate, PET), without extended polypropylene (Casted Polypropylene, CPP) or co-extrusion pressure oriented polypropylene (OPP) (Oriented polypropylene, OPP) etc..The material of graph layer 41 can be photosensitive resin.In the present embodiment, flexible die The surface pencil hardness of tool 4 can be between B to 2H.In addition, in various embodiments, flexible die 4 is also possible to be integrally formed, The present invention is without restriction.

In the present embodiment, thermoplastic resin 3 is extruded between idler wheel 221 and idler wheel 222 by extruder, and flexible die Tool 4 also is located between idler wheel 221 and idler wheel 222, therefore passes through the rolling of idler wheel 221 and idler wheel 222, can be in thermoplastic resin 3 Surface imprint go out a second graph 51, and formed such as Fig. 5 (fexible film 5 shown in circular dashed line region b) in Fig. 3, finally It is recycled by idler wheel 241, wherein fexible film 5 is integrally formed.It is noted that since second graph 51 is via tool There is the flexible die 4 of the first figure 421 to imprint out, therefore, the first figure 421 and second graph 51 mirror image each other.In addition, logical Cross the spacing between adjustment idler wheel 221 and idler wheel 222, thus it is possible to vary the thickness of the fexible film 5 of institute's output, such as reduce idler wheel Spacing between 221 and idler wheel 222, can the relatively thin fexible film 5 of output；Conversely, increasing between idler wheel 221 and idler wheel 222 Spacing, then can the thicker fexible film 5 of output.Moreover, the surface heating temperature of idler wheel 221 and/or idler wheel 222 is adjusted, The replication rate of changeable fexible film 5, to obtain preferred 35%~100% replication rate, wherein replication rate described herein is Refer to the depth ratio of second graph 51 and the first figure 421, such as the depth of the first figure 421 is 100 μm, and second produced The depth of figure 51 is 60 μm, then its replication rate is then 60%.Wherein, depth can be mean depth or depth capacity.

The fexible film 5 produced through the above steps is integrally formed, shore hardness can between 30shore A~ Between 50shore D and its glass transition temperature can be at 40 degree Celsius or more, and too low glass transition temperature material is rolling Ratio of briquetting can be kept too low because of hot mastication when pressure.

In addition to this, thermoplastic resin 3 may include a lubricant, and material can be molecular weight between 3000~200000 Between amide waxe, poly- silicon oxygen, hard acid ester salt, polyethylene wax (PE Wax), polypropylene wax, erucyl amide (Erucylamide) Or Hirst wax (Hoechst Wax) etc., and the weight percent of its addition can be between 0.1%~5.0%.Lubricant can Being made an addition among thermoplastic resin 3 in a manner of mixing (compound).By adding lubricant, thermoplastic resin can be made It is formed by fexible film 5 after rouge 3 is embossed to be easier to separate with flexible die 4, and when fexible film 5 is as decorative layer, Demoulding operation after can help to ejection formation.

In addition, more may include a cleaning agent in the material of graph layer 41 on flexible die 4, material can be for example organosilicon Surfactant, and the weight percent of its addition can be between 0.5% to 5.0%.In this way, which flexible die can be reduced 4 adhesive force when removing with fexible film 5 is repeated with obtaining preferred replication rate and promoting surface flatness and flexible die 4 The number used.

As shown in fig. 6, it sets for the processing procedure of the preparation method of another fexible film of preferred embodiment according to the present invention Standby schematic diagram.In the present embodiment, the thermoplastic resin 3 that the extruder head of extruder 21 is squeezed out first is extruded into idler wheel 61,62 Between gap, be formed by curing film after the rolling of idler wheel 61,62, can then be heated again make film again and have it is plastic Property, film is rolled by the idler wheel 221, the idler wheel 222 (idler wheel mechanism 22) that are oppositely arranged, and flexible die 4 is cooperated to be arranged in rolling Between wheel 221, idler wheel 222, to form the fexible film 5a with second graph, in this, idler wheel 61,62 belongs to extruder 21 A part, idler wheel mechanism 22 is then the independent idler wheel mechanism being additionally arranged.Generally speaking, compared to previous embodiment, this reality Example is applied by idler wheel 61,62 first by 3 roll-down type of thermoplastic resin at film, then carries out one patterned processing.In other words, in different realities It applies in example, thermoplastic resin 3, which is also possible to provide in the form of ready-made film (illiquidity), gives idler wheel mechanism 22, as long as first passing through Heating is crossed, coining processing can be carried out by making it have a degree of plasticity.In this way, provide the flexible die of the first figure Tool does not have to across idler wheel 61 and idler wheel 62, and forms the configuration of another idler wheel.It is noted that adding for film In addition a heating equipment can be arranged after film leaves idler wheel 61 and idler wheel 62 to carry out in heat；Either directly adjustment control rolling The surface temperature of wheel 221,222, to be heated.In the present embodiment, the surface temperature control of idler wheel 221,222 is Celsius 130 Between~280 degree.

Separately it is noted that fexible film made by the preparation method of fexible film according to the present invention, not only may be used As previously described purposes, it can also be used as flexible die and be used, it in other words, can be new as one by the fexible film of output Flexible die, to make another fexible film.

Moreover, since the first figure is to be located at 4 surface of flexible die, rather than idler wheel 222, therefore to be imprinted when changing Pattern when, it is only necessary to flexible die 4 is replaced, without remaking idler wheel 222, therefore can be the case where not increasing great amount of cost Under, improve the diversity of the second graph of the fexible film 5 of output.

In conclusion the preparation method of the fexible film provided according to the present invention, pass through flexible die and idler wheel mechanism Cooperation can produce the fexible film with high quality in the case where not using the expensive idler wheel with pattern, Not only cost reduce, and because fexible film be integrally formed, therefore during stretching will not because multilayered structure design layer with The material of basement membrane is different, and generates cracking, deforms or fall off.

The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all Within the spirit and principles in the present invention, made any modification, equivalent replacement and improvement etc. should be included in guarantor of the invention Within the scope of shield.

Claims

1. a kind of preparation method of fexible film, characterized in that it comprises the following steps:

One thermoplastic resin is squeezed out by an extruder；

And the thermoplastic resin is imprinted with a flexible die and an idler wheel mechanism, the flexible die has one first figure, To form a fexible film with a second graph.

2. the preparation method of fexible film as described in claim 1, which is characterized in that wherein the flexible die includes a figure Shape layer and a base, first figure are set to the graph layer.

3. the preparation method of fexible film as claimed in claim 2, which is characterized in that wherein the material of the graph layer is light Quick resin.

4. the preparation method of fexible film as described in claim 1, which is characterized in that the wherein material of the thermoplastic resin Including polyvinyl chloride, polycarbonate, high density polyethylene (HDPE), medium density polyethylene, low density polyethylene (LDPE), polypropylene, polystyrene, Nylon, polymethyl methacrylate, polyurethane, polyurethanes, acrylonitrile-butadiene-styrene (ABS), linear low density polyethylene One of alkene or ethylene/vinyl alcohol copolymer are a variety of.

5. the preparation method of fexible film as described in claim 1, which is characterized in that wherein first figure and described the Two figures mirror image each other.

6. the preparation method of fexible film as described in claim 1, which is characterized in that wherein the thermoplastic resin further includes Weight percent between 0.1% to 5.0% lubricant.

7. the preparation method of fexible film as described in claim 1, which is characterized in that wherein there are two the idler wheel mechanism tools Roll the idler wheel of the thermoplastic resin and the flexible die.

8. the preparation method of fexible film as claimed in claim 7, which is characterized in that further include the following steps: adjustment two The spacing of the idler wheel, to change the thickness of the fexible film.

9. the preparation method of fexible film as claimed in claim 7, which is characterized in that further include the following steps: adjustment two The surface temperature of the idler wheel is between 130 DEG C to 180 DEG C.