WO2024012075A1 - 一种抗刮拉丝膜及其装置、制备方法和应用 - Google Patents

一种抗刮拉丝膜及其装置、制备方法和应用 Download PDF

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Publication number
WO2024012075A1
WO2024012075A1 PCT/CN2023/097064 CN2023097064W WO2024012075A1 WO 2024012075 A1 WO2024012075 A1 WO 2024012075A1 CN 2023097064 W CN2023097064 W CN 2023097064W WO 2024012075 A1 WO2024012075 A1 WO 2024012075A1
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Prior art keywords
scratch
drawing film
component
coating
roller
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PCT/CN2023/097064
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English (en)
French (fr)
Inventor
周鹏
沈渊
孙亮
潘家鑫
胡耀忠
曹建
Original Assignee
凯鑫森(上海)功能性薄膜产业股份有限公司
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Publication of WO2024012075A1 publication Critical patent/WO2024012075A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/14—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a travelling band
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C13/00—Means for manipulating or holding work, e.g. for separate articles
    • B05C13/02—Means for manipulating or holding work, e.g. for separate articles for particular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
    • B05C9/12—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation being performed after the application
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
    • B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
    • B05D3/065—After-treatment
    • B05D3/067—Curing or cross-linking the coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
    • B05D7/04—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber to surfaces of films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified
    • B05D7/544—No clear coat specified the first layer is let to dry at least partially before applying the second layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified
    • B05D7/546—No clear coat specified each layer being cured, at least partially, separately

Definitions

  • the invention relates to the technical field of scratch-resistant wire drawing films, and in particular to an anti-scratch wire drawing film and its device, preparation method and application.
  • One of the preparation methods of anti-scratch drawn film is to complete the preparation of drawn polyethylene terephthalate (PET) film on a drawing machine.
  • PET polyethylene terephthalate
  • the substrate passes between the opposite rollers, relying on the opposite rollers.
  • the lines on the surface of the roller grind out a brushed texture on the surface of the substrate to obtain a brushed PET film.
  • the above method mainly uses mechanical friction to destroy the film surface to form drawing patterns and textures.
  • the shortcomings of this method are: first, mechanical friction destroys the structure of the surface of the substrate and reduces the strength of the substrate itself, making quality problems prone to occur during later processing and use. Secondly, the wire drawing texture produced by mechanical friction can only be vertical wire drawing texture, that is, the wire drawing direction can only be parallel to the traveling direction of the substrate, and horizontal grain texture cannot be produced, which restricts the later application scope. Thirdly, the current drawing film prepared by mechanical friction method is not very refined, the texture is rough and blurred, and the drawing effect is poor.
  • the second method of preparing anti-scratch drawing film is through ultraviolet (UV) imprinting process.
  • UV ultraviolet
  • This method is to coat the surface of the transparent film substrate with a layer of UV-curable resin paint, and then press it through a special roller mold. Printing, UV irradiation is performed during the printing process to instantly solidify the paint.
  • the invention patent with publication number CN107797379A discloses a method for preparing a drawing film using ultraviolet light micro-nano imprinting technology.
  • the ultraviolet light curing glue is cured on the surface of the PET base material using ultraviolet light curing molding equipment to form a layer that is combined with the PET base material.
  • the UV curing molding equipment includes an unwinding section, a UV embossing forming section and a rewinding section;
  • the UV embossing forming section includes a drawing mold plate roller, which is arranged on both sides of the drawing mold plate roller.
  • the left support roller and the right support roller on the side, UV glue supply system and UV lamp set.
  • the disclosed process does not cause any damage to the surface of the PET substrate, and the prepared PET drawing film has good post-processing and use performance.
  • the distance between the dense textures of the drawing structure is about 5 to 10 ⁇ m, making it difficult to release the film; especially for the horizontal drawing structure, the direction of the structural lines is perpendicular to the rotation direction of the plate roller, and the UV glue is difficult to peel off from the plate roller.
  • the microstructure of the plate roller The residual UV glue inside will form periodic defects. If used for a long time, the microstructure of the plate roller will be filled with UV resin, making the plate roller unusable.
  • the common problem of both is low production efficiency and slow speed; the production speed of ordinary wire drawing film is 10M/min, and the production speed of horizontal stripe fine wire drawing film is ⁇ 5M/min. If the speed is too fast, bubbles will be formed, and the transfer effect of the release structure will be poor.
  • the purpose of the present invention is to provide an anti-scratch drawing film and its device, preparation method and application.
  • the production speed is fast and the efficiency is high, forming
  • the anti-scratch brushed film has high hardness, the surface of the cured layer has a concave structure, and has excellent scratch resistance.
  • the present invention adopts the following technical solutions:
  • the present invention provides an anti-scratch drawing film device, which includes an unwinding component, a pre-coating component, a secondary curing component and a winding component that are electrically connected in sequence;
  • the pre-coating components include a laminating roller, a driven roller, a pre-curing part and a liquid tank;
  • the laminating roller and the driven roller are connected by a transmission strip, and the surface of the transmission strip is provided with at least one (for example, 2, 4, 6, 8, 10, etc.) protrusions.
  • the working principle of the anti-scratch drawing film device is: the substrate is sent from the unwinding device, and pre-coating is performed on the pre-coating component.
  • the transmission strip is first passed through the liquid tank, and the transmission strip is Under the action of the rubber roller, the surface of the bulge is impregnated with the cured resin in the liquid tank, and then transported to the base material on the surface of the laminating roller through the conveyor strip.
  • the cured resin is Transfer to the surface of the substrate and solidify to form a pre-coat with a concave structure corresponding to the protrusions; before entering the secondary curing component, add cured resin to the surface of the pre-coat, then perform secondary curing, winding, and preparation A film with a recessed scratch-resistant structure was obtained.
  • the anti-scratch drawing film device is simple, and the raised surface of the transmission strip can be designed with horizontal or vertical stripes as needed. No special rollers are needed, and the cost is low.
  • the transmission strip provided with the protrusions solidifies during transfer.
  • the resin forms a concave structure, which is more conducive to improving the scratch resistance of the film layer; in addition, the cured resin is placed in the liquid tank and then transferred to the surface of the substrate by the transmission strip.
  • the formed pre-coat layer can be formed first and then transferred The effect is good; the pre-coated parts play the role of pre-filled structure, which can greatly improve production efficiency and speed up production.
  • the film layer formed by the secondary curing parts has high surface hardness and is not easily scratched and damaged.
  • an auxiliary roller is provided between the unwinding component and the pre-coating component.
  • the auxiliary roller is arranged according to the needs of the device, and the auxiliary roller arranged between the unwinding component and the pre-coating component facilitates the transportation of the substrate.
  • the pre-cured part is provided on one side of the laminating roller.
  • the pre-cured part is on the other side where the cured layer is provided.
  • the material of the laminating roller includes silicone.
  • the laminating roller in the device can use a silicone laminating roller, which has good adhesion to the substrate.
  • the process of transferring the cured resin to the surface of the substrate is simpler, and it also facilitates the transfer of UV glue from the roller. Upper peeling further improves the processing speed.
  • the hardness of the laminating roller is 30-40A, such as 32A, 34A, 36A, 38A, etc.
  • the pre-cured part includes an electrodeless UV mercury lamp.
  • the liquid tank includes at least one (for example, 2, 4, 6, 8, 10, etc.) rubber rollers.
  • an auxiliary roller is provided between the pre-coating component and the secondary curing component.
  • an auxiliary roller is provided between the secondary curing component and the winding component.
  • the present invention provides a method for preparing a scratch-resistant drawing film, which is realized by the scratch-resistant drawing film device described in the first aspect;
  • the preparation method includes the following steps:
  • the wavelength of ultraviolet light in the pre-curing is 320-370nm (such as 330nm, 340nm, 350nm, 360nm, etc., further preferably 356nm), and the energy is 10-30mj/cm 2 (such as 12mj/cm 2 , 14mj/cm 2 , 16mj/cm 2 , 18mj/cm 2 , 20mj/cm 2 , 22mj/cm 2 , 24mj/cm 2 , 26mj/cm 2 , 28mj/cm 2 , etc.).
  • the energy is 10-30mj/cm 2 (such as 12mj/cm 2 , 14mj/cm 2 , 16mj/cm 2 , 18mj/cm 2 , 20mj/cm 2 , 22mj/cm 2 , 24mj/cm 2 , 26mj/cm 2 , 28mj/cm 2 , etc.).
  • the material of the substrate includes polyethylene terephthalate and/or polycarbonate.
  • the cured resin includes acrylic UV liquid resin.
  • the secondary curing method includes ultraviolet curing.
  • the wavelength of ultraviolet light in the ultraviolet curing is 375-420nm (such as 380nm, 390nm, 400nm, 410nm, etc., further preferably 385nm), and the energy is >200mj/cm 2 (such as 220mj/cm 2 , 240mj/cm 2 , 260mj/cm 2 , 280mj/cm 2 etc.).
  • the preparation method includes the following steps:
  • the present invention provides an anti-scratch drawing film, which is obtained by the preparation method described in the second aspect;
  • the scratch-resistant drawing film includes a base material and a cured layer disposed on the surface of the base material;
  • the surface of the solidified layer is provided with at least one recessed area.
  • the thickness of the solidified layer is 20-500 ⁇ m, such as 50 ⁇ m, 100 ⁇ m, 150 ⁇ m, 200 ⁇ m, 250 ⁇ m, 300 ⁇ m, 350 ⁇ m, 400 ⁇ m, 450 ⁇ m, etc.
  • the present invention provides an application of an anti-scratch drawing film, that is, a home appliance casing.
  • the surface of the home appliance casing is provided with the scratch-resistant drawing film described in the third aspect.
  • the present invention has the following beneficial effects:
  • the device of the present invention does not require the processing of expensive drawing mold rollers; if new defects are added to the film surface, the film can be directly replaced, and the process can be completed in about 10 minutes.
  • the device has high preparation efficiency and is simple and easy to operate.
  • the device of the present invention has a fast production speed, the prepared scratch-resistant drawing film has high surface hardness, and the surface of the solidified layer has a concave structure.
  • the surface hardness of the scratch-resistant drawing film formed by the device of the present invention is above 4H, and the production speed is above 30M/min.
  • Figure 1 is a schematic structural diagram of the anti-scratch drawing film device according to the present invention.
  • an anti-scratch drawing film device is used to prepare an anti-scratch drawing film.
  • the structural schematic diagram of the scratch-resistant drawing film device is shown in Figure 1.
  • the anti-scratch drawing film device includes an unwinding component 1, a pre-winding component 1, and a pre-winding component 1 that are electrically connected in sequence.
  • the coating part, the secondary curing part 3 and the winding part 4; the pre-coating part includes a laminating roller 21, a driven roller 22, a pre-curing part 25 and a liquid tank 24.
  • the laminating roller 21 and the driven roller 22 are driven by The strips 23 are connected, and the surface of the transmission strip 23 is provided with at least one (for example, 2, 4, 6, 8, 10, etc.) protrusions.
  • the liquid tank 24 includes at least one (for example, 2, 4, 6, 8, 10, etc.) rollers 241 with rubber.
  • the pre-curing part 25 is arranged on the side of the laminating roller 21.
  • An auxiliary roller is arranged between the unwinding part 1 and the pre-coating part.
  • An auxiliary roller is arranged between the pre-coating part and the secondary curing part 3.
  • the secondary curing part An auxiliary roller is provided between 3 and the winding part 4.
  • the material of the laminating roller 21 is silica gel, and the hardness is 30-40A (such as 32A, 34A, 36A, 38A, etc.).
  • the pre-curing part 25 includes an electrodeless UV mercury lamp.
  • the structure of the convex surface of the transmission strip 23 can be designed as needed, for example, the convex surface has horizontal stripes.
  • the working principle of the anti-scratch drawing film device is: the substrate is sent from the unwinding device (i.e., the unwinding part 1), and pre-coating is performed in the pre-coating part.
  • the conveyor strip is first 23 passes through the liquid tank 24. Under the action of the rubber roller 241, the surface of the protrusions on the transmission strip 23 is impregnated with the cured resin in the liquid tank 24, and then transported to the base material on the surface of the laminating roller 21 through the transmission strip 23.
  • a film with a concave scratch-resistant structure is prepared.
  • the anti-scratch drawing film includes a base material (material is polyethylene terephthalate, purchased from SKC, brand V7610) and a cured layer (thickness) disposed on the surface of the base material. is 200 ⁇ m, and the raw material is cured resin, which is an acrylic UV liquid resin, purchased from Feikai, with the brand number 0018).
  • the anti-scratch drawing film is prepared by the following method.
  • the preparation method includes the following steps:
  • the anti-scratch drawing film includes a base material (material is polycarbonate, purchased from TECHNOLLOY, brand name: C000Z) and a cured layer (thickness is 20 ⁇ m, the raw material is cured
  • the resin is an acrylic UV liquid resin, purchased from Haihong (brand name: 16A).
  • the anti-scratch drawing film is prepared by the following method.
  • the preparation method includes the following steps:
  • the anti-scratch drawing film includes a base material (material is polyethylene terephthalate). Acid glycol ester, purchased from SKC, brand name V7610) and a cured layer (thickness 500 ⁇ m, raw material is cured resin, purchased from SKC, brand name V7610) on the surface of the substrate, which is an acrylic UV liquid resin, purchased from QUNTOP, brand name 4908).
  • the anti-scratch drawing film is prepared by the following method.
  • the preparation method includes the following steps:
  • Example 1 The difference between this comparative example and Example 1 is that the preparation of the scratch-resistant drawing film is completed on a drawing machine.
  • the anti-scratch drawing film includes a base material (made of polyethylene terephthalate, purchased from SKC, brand V7610) and a cured layer (thickness) disposed on the surface of the base material. is 200 ⁇ m, and the raw material is cured resin, which is an acrylic UV liquid resin, purchased from Feikai, with the brand number 0018).
  • the anti-scratch drawing film is prepared by the following method.
  • the preparation method includes the following steps:
  • the substrate passes between the pair of rollers, and relying on the lines on the surface of the pair of rollers, a brushed texture is ground on the surface of the substrate to obtain a brushed PET film.
  • Example 1 The difference between this comparative example and Example 1 is that the scratch-resistant drawing film is prepared through a UV embossing process.
  • the anti-scratch drawing film includes a base material (made of polyethylene terephthalate, purchased from SKC, brand V7610) and a cured layer (thickness) disposed on the surface of the base material. is 200 ⁇ m, and the raw material is cured resin, which is an acrylic UV liquid resin, purchased from Feikai, with the brand number 0018).
  • the anti-scratch drawing film is prepared by the following method.
  • the preparation method includes the following steps:
  • a layer of cured resin is coated on the surface of the substrate and embossed using the roller mold disclosed in the Chinese invention patent with publication number CN107797379A. UV irradiation is performed during the embossing process to instantly solidify the resin to form a cured layer and obtain an anti- Scrape the brushed film.
  • Test requirements The sliding direction of the pencil is perpendicular to the direction of the material structure, and the pencil and the test sample form an angle of 45 degrees;
  • Judgment criteria If there is no scratch on the prism layer visually, proceed to the next gradient pencil hardness test, and record the pencil hardness until the prism layer is scratched.
  • Comparative Examples 1-2 and Example 1 show that the performance of Comparative Examples 1-2 is not as good as Example 1, which proves that the anti-scratch drawing film device of the present invention is more conducive to the simple, fast and cheap preparation of anti-scratch drawing film devices with excellent performance compared to the devices or methods of the prior art. Anti-scratch brushed film.
  • the present invention illustrates the detailed methods of the present invention through the above embodiments, but the present invention is not limited to the above detailed methods, that is, it does not mean that the present invention must rely on the above detailed methods to be implemented.
  • Those skilled in the art should understand that any improvements to the present invention, equivalent replacement of raw materials of the product of the present invention, addition of auxiliary ingredients, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Physics & Mathematics (AREA)
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Abstract

本发明涉及一种抗刮拉丝膜及其装置、制备方法和应用，所述抗刮拉丝膜装置包括依次电连接的放卷部件、预涂布部件、二次固化部件和收卷部件；所述预涂布部件包括贴合辊、从动辊、预固化件和液槽；所述贴合辊和从动辊由传动条连接，所述传动条表面设置有至少一个凸起。利用本发明所述抗刮拉丝膜装置进行作业时，生产速度快，效率高，形成的抗刮拉丝膜硬度高，固化层表面具有凹陷结构，抗刮性能优异。

Description

一种抗刮拉丝膜及其装置、制备方法和应用 技术领域
本发明涉及抗刮拉丝膜技术领域，尤其涉及一种抗刮拉丝膜及其装置、制备方法和应用。
背景技术
能制备性能优异而且工艺简单的抗刮拉丝膜是目前的研究重点。
抗刮拉丝膜的制备方法之一是在拉丝机上完成拉丝聚对苯二甲酸乙二醇酯(PET)薄膜的制备，利用拉丝机的对辊，基材从对辊之间穿过，依靠对辊表面的纹线，在基材表面磨出拉丝纹理，得到拉丝PET薄膜。上述方法主要是根据机械摩擦的方法在膜表面进行破坏而形成拉丝图案和纹路。
这种方法不足之处在于：首先，机械摩擦破坏了基材表面的结构，降低了基材本身的强度，在后期的加工和使用过程中容易出现质量问题。其次，机械摩擦的方法生产的拉丝纹，只能是竖向拉丝纹理，即拉丝方向只能是平行于基材行进方向，无法制备横纹纹理，这就制约了后期的应用范围。再次，目前利用机械摩擦的方法制备的拉丝膜精细化不高，纹理比较粗糙模糊，拉丝效果较差。
抗刮拉丝膜的制备方法之二是通过紫外(UV)压印工艺制备，此方法是将透明的薄膜基材表面涂布一层可以进行UV固化的树脂涂料，经过特制的辊筒模具进行压印，在压印过程中进行UV照射，使涂料瞬间固化。
公开号为CN107797379A的发明专利公开了一种紫外光微纳米压印技术制备拉丝膜的方法，以紫外光固化成型设备使紫外光固化胶水在PET基材表面固化后形成一层与PET基材结合良好的拉丝结构膜层；所述紫外光固化成型设备包括开卷区间，紫外光压印成型区间及收卷区间；所述紫外光压印成型区间包括拉丝模具版辊，设置在拉丝模具版辊两侧的左侧支撑辊和右侧支撑辊，UV胶水供胶系统和UV灯组。其公开的工艺对PET基材表面没有任何破坏，所制备的PET拉丝膜具有良好的后期加工和使用性能。
但是紫外压印工艺中的局限如下：
(1)需要使用特殊的拉丝模具版辊，此模具版辊加工工艺复杂，成本高；特别是横纹细拉丝，纹路方向与版辊转动方向垂直，就注定了加工时辊子无法转动，只能小区域研磨加工；上述加工工艺导致单辊的加工成本很高，单只辊子费用达到30万元人民币。
(2)拉丝结构纹路密集结构的间距在5～10μm左右，脱膜困难；特别是横纹拉丝结构，结构纹路方向同版辊转动方向垂直，UV胶从版辊上难剥离，版辊微结构内UV胶的残留会形成周期缺陷，长时间使用版辊微结构会被UV树脂填充满，从而导致版辊无法使用。
不论是拉丝机生产还是紫外压印工艺，二者共同的问题是生产效率低，速度慢；普通拉丝膜生产速度10M/min，如果是横纹细拉丝膜生产速度＜5M/min。速度过快会形成气泡，脱膜结构转印效果差。
综上所述，开发一种利于抗刮拉丝膜制备的装置是至关重要的。
发明内容
针对现有技术的不足，本发明的目的在于提供一种抗刮拉丝膜及其装置、制备方法和应用，利用本发明所述抗刮拉丝膜装置进行作业时，生产速度快，效率高，形成的抗刮拉丝膜硬度高，固化层表面具有凹陷结构，抗刮性能优异。
为达此目的，本发明采用以下技术方案：
第一方面，本发明提供一种抗刮拉丝膜装置，所述抗刮拉丝膜装置包括依次电连接的放卷部件、预涂布部件、二次固化部件和收卷部件；
所述预涂布部件包括贴合辊、从动辊、预固化件和液槽；
所述贴合辊和从动辊由传动条连接，所述传动条表面设置有至少一个(例如2个、4个、6个、8个、10个等)凸起。
本发明中，所述抗刮拉丝膜装置的工作原理是：从放卷装置发送基材，在预涂布部件进行预涂布，预涂布时，先将传送条经过液槽，传动条上的凸起在带胶辊的作用下，表面浸渍有液槽中的固化树脂，然后再经传送条输送至贴合辊表面的基材上，在两个贴合辊的作用下，将固化树脂转移至基材表面，固化，形成与凸起对应的含有凹陷结构的预涂层；在进入二次固化部件前，在预涂层表面补加固化树脂，再进行二次固化，收卷，制备得到具有凹陷抗刮结构的薄膜。
本发明中，所述抗刮拉丝膜装置简单，传动条的凸起表面可根据需要设计横纹或纵纹，无需特别的辊子，成本低，设置有凸起的传动条在转印时，固化树脂形成凹陷结构，更利于提升膜层的抗刮性；除此之外，将固化树脂设置于液槽中，再由传动条转移至基材表面，形成的预涂层能够先成型，转印效果好；预涂布部件起到预先填充结构的作用，可以大大提高生产效率，生产速度快。二次固化部件形成的膜层，表面硬度高，不易被划伤破坏。
优选地，所述放卷部件和预涂布部件之间设置有辅助辊。
本发明中，辅助辊根据装置需要进行设置，所述放卷部件和预涂布部件之间设置的辅助辊助于基材的传送。
优选地，所述预固化件设置于贴合辊一侧。
本发明中，所述预固化件在设置固化层的另一侧。
优选地，所述贴合辊的材质包括硅胶。
本发明中，所述装置中贴合辊可以使用硅胶贴合辊，与基材贴合性好，在制备膜层式，固化树脂转移至基材表面的过程更简单，也利于UV胶从辊上剥离，进一步提升加工速度快。
优选地，所述贴合辊的硬度为30-40A，例如32A、34A、36A、38A等。
优选地，所述预固化件包括无极UV汞灯。
优选地，所述液槽包括至少一个(例如2个、4个、6个、8个、10个等)带胶辊。
优选地，所述预涂布部件和二次固化部件之间设置有辅助辊。
优选地，所述二次固化部件和收卷部件之间设置有辅助辊。
第二方面，本发明提供一种抗刮拉丝膜的制备方法，所述制备方法由第一方面所述的抗刮拉丝膜装置实现；
所述制备方法包括如下步骤：
(1)将基材经放卷部件传送至预涂布部件的贴合辊，启动预涂布部件，通过传动条将设置于液槽中的固化树脂转移至与贴合辊接触的基材表面，再通过预固化件进行预固化，形成预涂层；
(2)在预涂层表面设置固化树脂，然后通过二次固化部件完成二次固化；
(3)在收卷装置完成收卷，得到抗刮拉丝膜。
优选地，步骤(1)中，所述预固化中紫外线的波长为320-370nm(例如330nm、340nm、350nm、360nm等，进一步优选356nm)，能量为10-30mj/cm2(例如12mj/cm2、14mj/cm2、16mj/cm2、18mj/cm2、20mj/cm2、22mj/cm2、24mj/cm2、26mj/cm2、28mj/cm2等)。
优选地，所述基材的材质包括聚对苯二甲酸乙二醇酯和/或聚碳酸酯。
优选地，所述固化树脂包括丙烯酸紫外液态树脂。
优选地，步骤(2)中，所述二次固化的方式包括紫外光固化。
优选地，所述紫外光固化中紫外线的波长为375-420nm(例如380nm、390nm、400nm、410nm等，进一步优选385nm)，能量＞200mj/cm2(例如220mj/cm2、240mj/cm2、260mj/cm2、280mj/cm2等)。
作为优选的技术方案，所述制备方法包括如下步骤：
(1)将基材经放卷部件传送至预涂布部件的贴合辊，启动预涂布部件，通过传动条将设置于液槽中的丙烯酸紫外液态树脂转移至与贴合辊接触的基材表面，再通过预固化件在紫外线的波长为320-370nm和能量为10-30mj/cm2的条件下预固化，形成预涂层；
(2)在预涂层表面设置固化树脂，然后通过二次固化部件在紫外线的波长为375-420nm和能量＞200mj/cm2的条件下，完成二次固化；
(3)在收卷装置(即收卷部件)完成收卷，得到抗刮拉丝膜。
第三方面，本发明提供一种抗刮拉丝膜，所述抗刮拉丝膜由第二方面所述的制备方法得到；
所述抗刮拉丝膜包括基材和设置于所述基材表面的固化层；
所述固化层表面设置有至少一个凹陷区域。
优选地，所述固化层的厚度为20-500μm，例如50μm、100μm、150μm、200μm、250μm、300μm、350μm、400μm、450μm等。
第四方面，本发明提供一种抗刮拉丝膜的应用，即一种家电外壳，所述家电外壳的表面设置有第三方面所述的抗刮拉丝膜。
相对于现有技术，本发明具有以下有益效果：
(1)本发明所述装置无需加工昂贵的拉丝模具版辊；若膜表面新增缺陷以后直接更换膜即可，10min左右完成，所述装置备机效率高，简单易操作。
(2)本发明所述装置生产速度快，制备的抗刮拉丝膜表面硬度高，固化层表面具有凹陷结构。
(3)本发明所述装置形成的抗刮拉丝膜的表面硬度在4H以上，生产速度在30M/min以上。
附图说明
图1是本发明所述抗刮拉丝膜装置的结构示意图。
其中：1-放卷部件；21-贴合辊；22-从动辊；23-传动条；24-液槽；241-带胶辊；25-预固化件；3-二次固化部件；4-收卷部件。
具体实施方式
为便于理解本发明，本发明列举实施例如下。本领域技术人员应该明了，所述实施例仅仅是帮助理解本发明，不应视为对本发明的具体限制。
本发明各实施例中，使用一种抗刮拉丝膜装置进行抗刮拉丝膜的制备，其结构示意图如图1所示，所述抗刮拉丝膜装置包括依次电连接的放卷部件1、预涂布部件、二次固化部件3和收卷部件4；预涂布部件包括贴合辊21、从动辊22、预固化件25和液槽24，贴合辊21和从动辊22由传动条23连接，传动条23表面设置有至少一个(例如2个、4个、6个、8个、10个等)凸起。液槽24包括至少一个(例如2个、4个、6个、8个、10个等)带胶辊241。预固化件25设置于贴合辊21一侧，放卷部件1和预涂布部件之间设置有辅助辊，预涂布部件和二次固化部件3之间设置有辅助辊，二次固化部件3和收卷部件4之间设置有辅助辊。
示例性地，贴合辊21的材质为硅胶，硬度为30-40A(例如32A、34A、36A、38A等)。
示例性地，预固化件25包括无极UV汞灯。
示例性地，传动条23表面凸起的结构可根据需要设计，例如凸起表面具有横纹。
本发明中，所述抗刮拉丝膜装置的工作原理是：从放卷装置(即放卷部件1)发送基材，在预涂布部件进行预涂布，预涂布时，先将传送条23经过液槽24，传动条23上的凸起在带胶辊241的作用下，表面浸渍有液槽24中的固化树脂，然后再经传送条23输送至贴合辊21表面的基材上，在两个贴合辊21 的作用下，将固化树脂转移至基材表面，固化，形成与凸起对应的含有凹陷结构的预涂层；在进入二次固化部件3前，在预涂层表面补加固化树脂，再进行二次固化，收卷，制备得到具有凹陷抗刮结构的薄膜。
实施例1
本实施例提供一种抗刮拉丝膜，抗刮拉丝膜包括基材(材质为聚对苯二甲酸乙二醇酯，购于SKC，牌号为V7610)和设置于基材表面的固化层(厚度为200μm，原料为固化树脂，属于丙烯酸紫外液态树脂，购于飞凯，牌号为0018)。
抗刮拉丝膜由如下方法制备，制备方法包括如下步骤：
(1)将基材经放卷部件1传送至预涂布部件的贴合辊21，启动预涂布部件，通过传动条23将设置于液槽24中的丙烯酸紫外液态树脂转移至与贴合辊21接触的基材表面，再通过预固化件25在紫外线的波长为365nm和能量为20mj/cm2的条件下预固化，形成预涂层；
(2)在预涂层表面设置固化树脂，然后通过二次固化部件3在紫外线的波长为385nm和能量250mj/cm2的条件下，完成二次固化；
(3)在收卷装置(即收卷部件4)完成收卷，得到抗刮拉丝膜。
实施例2
本实施例提供一种抗刮拉丝膜，抗刮拉丝膜包括基材(材质为聚碳酸酯，购于TECHNOLLOY，牌号为C000Z)和设置于基材表面的固化层(厚度为20μm，原料为固化树脂，属于丙烯酸紫外液态树脂，购于海宏牌号为16A)。
抗刮拉丝膜由如下方法制备，制备方法包括如下步骤：
(1)将基材经放卷部件1传送至预涂布部件的贴合辊21，启动预涂布部件，通过传动条23将设置于液槽24中的丙烯酸紫外液态树脂转移至与贴合辊21接触的基材表面，再通过预固化件25在紫外线的波长为365nm和能量为10mj/cm2的条件下预固化，形成预涂层；
(2)在预涂层表面设置固化树脂，然后通过二次固化部件3在紫外线的波长为385nm和能量400mj/cm2的条件下，完成二次固化；
(3)在收卷装置(即收卷部件4)完成收卷，得到抗刮拉丝膜。
实施例3
本实施例提供一种抗刮拉丝膜，抗刮拉丝膜包括基材(材质为聚对苯二甲 酸乙二醇酯，购于SKC，牌号为V7610)和设置于基材表面的固化层(厚度为500μm，原料为固化树脂，属于丙烯酸紫外液态树脂，购于QUNTOP牌号为4908)。
抗刮拉丝膜由如下方法制备，制备方法包括如下步骤：
(1)将基材经放卷部件1传送至预涂布部件的贴合辊21，启动预涂布部件，通过传动条23将设置于液槽24中的丙烯酸紫外液态树脂转移至与贴合辊21接触的基材表面，再通过预固化件25在紫外线的波长为365nm和能量为30mj/cm2的条件下预固化，形成预涂层；
(2)在预涂层表面设置固化树脂，然后通过二次固化部件3在紫外线的波长为385nm和能量300mj/cm2的条件下，完成二次固化；
(3)在收卷装置(即收卷部件4)完成收卷，得到抗刮拉丝膜。
对比例1
本对比例与实施例1的区别在于在拉丝机上完成抗刮拉丝膜的制备。
本对比例提供一种抗刮拉丝膜，抗刮拉丝膜包括基材(材质为聚对苯二甲酸乙二醇酯，购于SKC，牌号为V7610)和设置于基材表面的固化层(厚度为200μm，原料为固化树脂，属于丙烯酸紫外液态树脂，购于飞凯，牌号为0018)。
抗刮拉丝膜由如下方法制备，制备方法包括如下步骤：
利用拉丝机的对辊，基材从对辊之间穿过，依靠对辊表面的纹线，在基材表面磨出拉丝纹理，得到拉丝PET薄膜。
对比例2
本对比例与实施例1的区别在于通过紫外压印工艺制备抗刮拉丝膜。
本对比例提供一种抗刮拉丝膜，抗刮拉丝膜包括基材(材质为聚对苯二甲酸乙二醇酯，购于SKC，牌号为V7610)和设置于基材表面的固化层(厚度为200μm，原料为固化树脂，属于丙烯酸紫外液态树脂，购于飞凯，牌号为0018)。
抗刮拉丝膜由如下方法制备，制备方法包括如下步骤：
在基材表面涂布一层固化树脂，经过公开号为CN107797379A的中国发明专利中公开的辊筒模具进行压印，在压印过程中进行UV照射，使树脂瞬间固化，形成固化层，得到抗刮拉丝膜。
性能测试
将实施例1-3和对比例1-2的抗刮拉丝膜进行如下测试：
(1)表面硬度：ASTM D3363铅笔硬度计、荷重250g；
测试要求：铅笔滑动方向垂直于材料结构方向，铅笔与测试样品成45度夹角；
判定标准：目视如棱镜层无划穿进入下一梯度铅笔硬度测试，直至划穿记录其铅笔硬度。
(2)生产速度：机台实际转动速度，单位M/min。
测试结果汇总于表1中。
表1-实施例1-3和对比例1-2的测试数据汇总
分析表1数据可知，本发明抗刮拉丝膜装置形成的抗刮拉丝膜的表面硬度在4H以上，生产速度在30M/min以上。本发明装置无需加工昂贵的拉丝模具版辊；若膜表面新增缺陷以后直接更换膜即可，10min左右完成，装置备机效率高，简单易操作；本发明装置生产速度快，制备的抗刮拉丝膜表面硬度高。
分析对比例1-2与实施例1可知，对比例1-2性能不如实施例1，证明本发明抗刮拉丝膜装置相对于现有技术的装置或方法更利于简单快速廉价地制备性能优异的抗刮拉丝膜。
申请人声明，本发明通过上述实施例来说明本发明的详细方法，但本发明并不局限于上述详细方法，即不意味着本发明必须依赖上述详细方法才能实施。所属技术领域的技术人员应该明了，对本发明的任何改进，对本发明产品各原料的等效替换及辅助成分的添加、具体方式的选择等，均落在本发明的保护范围和公开范围之内。

Claims (10)

  1. 一种抗刮拉丝膜装置，其特征在于，所述抗刮拉丝膜装置包括依次电连接的放卷部件、预涂布部件、二次固化部件和收卷部件；
    所述预涂布部件包括贴合辊、从动辊、预固化件和液槽；
    所述贴合辊和所述从动辊由传动条连接，所述传动条表面设置有至少一个凸起。
  2. 根据权利要求1所述的抗刮拉丝膜装置，其特征在于，所述放卷部件和所述预涂布部件之间设置有辅助辊；
    优选地，所述预固化件设置于所述贴合辊一侧；
    优选地，所述贴合辊的材质包括硅胶；
    优选地，所述贴合辊的硬度为30-40A；
    优选地，所述预固化件包括无极UV汞灯；
    优选地，所述液槽包括至少一个带胶辊。
  3. 根据权利要求1或2所述的抗刮拉丝膜装置，其特征在于，所述预涂布部件和所述二次固化部件之间设置有辅助辊；
    优选地，所述二次固化部件和所述收卷部件之间设置有辅助辊。
  4. 一种抗刮拉丝膜的制备方法，其特征在于，所述制备方法由权利要求1-3任一项所述的抗刮拉丝膜装置实现；
    所述制备方法包括如下步骤：
    (1)将基材经放卷部件传送至预涂布部件的贴合辊，启动预涂布部件，通过传动条将设置于液槽中的固化树脂转移至与贴合辊接触的基材表面，再通过预固化件进行预固化，形成预涂层；
    (2)在预涂层表面设置固化树脂，然后通过二次固化部件完成二次固化；
    (3)在收卷部件完成收卷，得到抗刮拉丝膜。
  5. 根据权利要求4所述的制备方法，其特征在于，步骤(1)中，所述预固化中紫外线的波长为320-370nm，能量为10-30mj/cm2；
    优选地，所述基材的材质包括聚对苯二甲酸乙二醇酯和/或聚碳酸酯；
    优选地，所述固化树脂包括丙烯酸紫外液态树脂。
  6. 根据权利要求4或5所述的制备方法，其特征在于，步骤(2)中，所述二次固化的方式包括紫外光固化；
    优选地，所述紫外光固化中紫外线的波长为375-420nm，能量＞200mj/cm2。
  7. 根据权利要求4所述的制备方法，其特征在于，所述制备方法包括如下步骤：
    (1)将基材经放卷部件传送至预涂布部件的贴合辊，启动预涂布部件，通过传动条将设置于液槽中的丙烯酸紫外液态树脂转移至与贴合辊接触的基材表面，再通过预固化件在紫外线的波长为320-370nm和能量为10-30mj/cm2的条件下预固化，形成预涂层；
    (2)在预涂层表面设置固化树脂，然后通过二次固化部件在紫外线的波长为375-420nm和能量＞200mj/cm2的条件下，完成二次固化；
    (3)在收卷部件完成收卷，得到抗刮拉丝膜。
  8. 一种抗刮拉丝膜，其特征在于，所述抗刮拉丝膜由权利要求4-6任一项所述的制备方法得到；
    所述抗刮拉丝膜包括基材和设置于所述基材表面的固化层；
    所述固化层表面设置有至少一个凹陷区域。
  9. 根据权利要求8所述的抗刮拉丝膜，其特征在于，所述固化层的厚度为20-500μm。
  10. 一种家电外壳，其特征在于，所述家电外壳的表面设置有权利要求8或9所述的抗刮拉丝膜。
PCT/CN2023/097064 2022-07-13 2023-05-30 一种抗刮拉丝膜及其装置、制备方法和应用 WO2024012075A1 (zh)

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