WO2008142207A1 - Method for coating transparent plastic products - Google Patents

Method for coating transparent plastic products Download PDF

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Publication number
WO2008142207A1
WO2008142207A1 PCT/FI2008/050288 FI2008050288W WO2008142207A1 WO 2008142207 A1 WO2008142207 A1 WO 2008142207A1 FI 2008050288 W FI2008050288 W FI 2008050288W WO 2008142207 A1 WO2008142207 A1 WO 2008142207A1
Authority
WO
WIPO (PCT)
Prior art keywords
coating
product
plastic product
plastic
onto
Prior art date
Application number
PCT/FI2008/050288
Other languages
French (fr)
Inventor
Tommi Stenroos
Torolf Pelin
Tomi Dahlberg
Original Assignee
Pintavision Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from FI20070411A external-priority patent/FI20070411A0/en
Application filed by Pintavision Oy filed Critical Pintavision Oy
Publication of WO2008142207A1 publication Critical patent/WO2008142207A1/en

Links

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/046—Forming abrasion-resistant coatings; Forming surface-hardening coatings
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • 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
    • B05D1/002—Processes for applying liquids or other fluent materials the substrate being rotated
    • B05D1/005—Spin 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
    • B05D2201/00—Polymeric substrate or laminate
    • 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
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/584—Scratch resistance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/754—Self-cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/14—Printing or colouring
    • B32B38/145—Printing

Definitions

  • An object of this invention is a method for coating transparent plastic products such as protective windows of mobile phones, wherein the method the scratchable surface of the plastic product is protected with hard-coating and the opposite surface of the plastic product is provided with a printing, such as a logo and/or text, upon which is provided a protective layer.
  • the invention is also related to a product, e.g. the protective window of a mobile phone.
  • Finnish patent FIl 17621 discloses a method for producing a protective window.
  • the protective window is provided with a logo and the scratchable surface is protected with hard-coating.
  • the protective windows are dislodged from the workpiece, after which they are attached in the cover of mobile phones.
  • This invention relates to a new method, which is characterized in that the plastic product is produced of a plate preform, which handling in the production of plastic products is performed from the processing location in the middle of the plate preform, such as a hole.
  • the production method for plastic products according to the invention is more inexpensive than all the other known methods.
  • the handling of the plate preform from a working phase and a work place to another is performed without touching with hands to the base plate, whereby the plastic product and all coatings, which belong to the plastic product, will remain clean throughout the whole production and coating process and after that regardless of the number of the process phases.
  • the method ensures the production of the nearest possible high quality of the end product.
  • the production and coating process is from the beginning to the end - from the production of the plate preform to the packed product - also faster than the other known production and coating processes for protective windows, because the phases of the production process for protective windows are in chain.
  • the examples of various embodiments of the invention are described in dependent claims of the patent claim set.
  • Figure 1 illustrates a plastic product according to one embodiment in an axonometric view
  • Figure 2 illustrates a plastic product according to another embodiment in an axonometric view
  • Figure 3 illustrates a disc preform 21, from which the plastic products are cut out.
  • the plastic products 3, 12 are produced, for example, by injection moulding with a sort of injection moulding equipment used for the production of CD/DVD discs and its further processing equipment. Plastic products can also be produced with another equipment, which enables the use of the method described in the patent FI-117621.
  • FIG. 1 The top surface of the plastic product is hard-coated 2 by the "spin- coating” method, in which varnish spreads equally from the center point outwards due to the centrifugal force in a direction of the radius onto the whole surface of the disc 21 (Fig. 3).
  • Functional coating 1 such as sol gel or nanotube structure-coating, is provided onto the hard-coating 2.
  • a characteristic of this coating may be, for example, self cleaning, scratch free, reflection preventive, etc.
  • Functional coating may also be hard diamond or sapphire surface provided by laser ablation.
  • One or more printings 5, 6, for example by means of tampo or silk screen printing or laser printing is made onto the opposite side, i.e. the underside, of the plastic product 3.
  • logos the name of companies or another information and background color can be made with printings.
  • diffractive surfaces which may be reflection preventive or decorative hologram figures, can also be made onto the surface of the plastic product.
  • decorative metal surfaces for example silver or gold colored frames around the protective window or metal colored logos and/or text, can be made onto the product.
  • the last coatings may be "primer” i.e. prime color/varnish 8 and protective varnish layer 9.
  • FIG 2 The top surface of the plastic product 12 is hard-coated 1 1 by the "spin- coating" method.
  • One printing 12, for example name/logo "PINT AVISION” with white pigment is made onto the opposite side of the plastic product.
  • a printing 13 of blue pigment may be for the background color and in the same for prime color. The printings are protected with protective varnish 15.
  • Figures 1 and 2 shows two extremes, where in Figure 1 there are several layers on both sides of the plastic product 3 and in Figure 2 there are only one layer above the plastic product 12 and three layers beneath the plastic product. Between said extremes are found numerous choices when the embodiments described in the patent claims are combined in a proper and desired way.
  • the end product may also be comprised of two plastic products, with which have decorative surfaces inbetween and the outer surfaces are provided with protective coating. More than two plastic products can also be superimposed, three, four or five and various decorative surfaces in the middle layers, whereby stereoscopic and 3D effect is achieved.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Laminated Bodies (AREA)

Abstract

An object of this invention is a method for coating transparent plastic products, such as the protective windows of mobile phones, wherein the scratchable surface of the plastic product (3, 12) is protected with hard-coating (2, 11) and the opposite surface of the plastic product is provided with a printing (5, 13) such as a logo and/or text, upon which is provided a protective layer (9, 15). Plastic product is produced of a plate preform (21), which handling in the production of plastic products is performed from the processing location in the middle of the plate preform, such as a hole (22).

Description

Method for coating transparent plastic products
An object of this invention is a method for coating transparent plastic products such as protective windows of mobile phones, wherein the method the scratchable surface of the plastic product is protected with hard-coating and the opposite surface of the plastic product is provided with a printing, such as a logo and/or text, upon which is provided a protective layer. The invention is also related to a product, e.g. the protective window of a mobile phone.
For example, Finnish patent FIl 17621 discloses a method for producing a protective window. The protective window is provided with a logo and the scratchable surface is protected with hard-coating. The protective windows are dislodged from the workpiece, after which they are attached in the cover of mobile phones.
This invention relates to a new method, which is characterized in that the plastic product is produced of a plate preform, which handling in the production of plastic products is performed from the processing location in the middle of the plate preform, such as a hole. The production method for plastic products according to the invention is more inexpensive than all the other known methods. Thus the handling of the plate preform from a working phase and a work place to another is performed without touching with hands to the base plate, whereby the plastic product and all coatings, which belong to the plastic product, will remain clean throughout the whole production and coating process and after that regardless of the number of the process phases. At the same time the method ensures the production of the nearest possible high quality of the end product. The production and coating process, as a whole, is from the beginning to the end - from the production of the plate preform to the packed product - also faster than the other known production and coating processes for protective windows, because the phases of the production process for protective windows are in chain. The examples of various embodiments of the invention are described in dependent claims of the patent claim set.
The invention is described in the following with an example by citing the enclosed drawing, wherein
Figure 1 illustrates a plastic product according to one embodiment in an axonometric view, Figure 2 illustrates a plastic product according to another embodiment in an axonometric view and
Figure 3 illustrates a disc preform 21, from which the plastic products are cut out.
The plastic products 3, 12 are produced, for example, by injection moulding with a sort of injection moulding equipment used for the production of CD/DVD discs and its further processing equipment. Plastic products can also be produced with another equipment, which enables the use of the method described in the patent FI-117621.
Figure 1. The top surface of the plastic product is hard-coated 2 by the "spin- coating" method, in which varnish spreads equally from the center point outwards due to the centrifugal force in a direction of the radius onto the whole surface of the disc 21 (Fig. 3). Functional coating 1, such as sol gel or nanotube structure-coating, is provided onto the hard-coating 2. A characteristic of this coating may be, for example, self cleaning, scratch free, reflection preventive, etc. Functional coating may also be hard diamond or sapphire surface provided by laser ablation. One or more printings 5, 6, for example by means of tampo or silk screen printing or laser printing is made onto the opposite side, i.e. the underside, of the plastic product 3. Logos, the name of companies or another information and background color can be made with printings. The same time with injection molding, diffractive surfaces, which may be reflection preventive or decorative hologram figures, can also be made onto the surface of the plastic product. By means of laser ablation and masking decorative metal surfaces, for example silver or gold colored frames around the protective window or metal colored logos and/or text, can be made onto the product. The last coatings may be "primer" i.e. prime color/varnish 8 and protective varnish layer 9.
Figure 2. The top surface of the plastic product 12 is hard-coated 1 1 by the "spin- coating" method. One printing 12, for example name/logo "PINT AVISION" with white pigment is made onto the opposite side of the plastic product. A printing 13 of blue pigment may be for the background color and in the same for prime color. The printings are protected with protective varnish 15.
Figures 1 and 2 shows two extremes, where in Figure 1 there are several layers on both sides of the plastic product 3 and in Figure 2 there are only one layer above the plastic product 12 and three layers beneath the plastic product. Between said extremes are found numerous choices when the embodiments described in the patent claims are combined in a proper and desired way. Naturally, the end product may also be comprised of two plastic products, with which have decorative surfaces inbetween and the outer surfaces are provided with protective coating. More than two plastic products can also be superimposed, three, four or five and various decorative surfaces in the middle layers, whereby stereoscopic and 3D effect is achieved.

Claims

Claims
1. A method for coating transparent plastic products, such as protective windows of mobile phones, wherein the scratchable surface of the plastic product (3, 12) is protected with hard-coating (2, 1 1) and the opposite surface of the plastic product is provided with a printing (5 ,13), such as a logo and/or a text, upon which is provided a protective layer (9, 15), characterized in that the plastic product is produced of a plate preform (21), the handling of which in the production of plastic products is performed from the processing location in the middle of the plate preform, such as a hole (22).
2. A method according to claim Error! Reference source not found., characterized in that the hard-coating (2) is provided onto the surface of the plate preform by the "spin-coating" method, in which varnish spreads uniformly from the center point outwards due to the centrifugal force in a direction of the radius onto the whole surface of the plate (21).
3. A method according to claim Error! Reference source not found, or 2, characterized in that the functional coating (1), such as sol gel, is provided onto the hard-coating (2).
4. A method according to any preceding claim, characterized in that the functional coating (1), such as nanotube structure-coating, is provided onto the hard-coating.
5. A method according to any preceding claim, characterized in that the functional coating (1) is provided by means of laser-ablation, such as a diamond surface, aluminum oxide, titanium dioxide or another photocatalystical, zinc, silver, iron, copper, tungsten, silicon, molybdenum, strontium or compositions of these.
6. A method according to any preceding claim, characterized in that the printing (5, 6) coming onto the opposite side, i.e. the underside, of the plastic product (3) is provided by means of tampo printing or silk screen printing or laser printing.
7. A method according to any preceding claim, characterized in that two or more printings (5, 6) are made one upon the other/adjacent with two or more colors.
8. A method according to any preceding claim, characterized in that a diffractive coating (4) is made onto the surface of the plastic product.
9. A method according to any preceding claim, characterized in that a decorative metal surface (7), such as aluminum, silver, copper, gold, etc., is provided by means of laser ablation.
10. A method according to any preceding claim, characterized in that the "primer" -coating (8) is provided onto printings/metallization.
1 1. A method according to any preceding claim, characterized in that coatings (4, 5, 6, 7, 8) on the opposite side, i.e. underside, of the plastic product are protected with protective varnish layer (9).
12. A product provided by according to any preceding claim, characterized in that the thickness of the plastic product (3) is 0.5-2.5 mm.
13. A product according to claim 12, such as the protective window of a mobile phone, characterized in that the thickness of the hard-coating layer above the plastic product is 2-10 μm.
14. A product according to claim 12 or 13, characterized in that the thickness of the functional coating (1) is 0.1-10 μm.
15. A product according to claim 12, 13 or 14, characterized in that the thicknesses of printings (5, 6) are 1.5-20 μm.
16. A product according to claim 12-15, characterized in that the thickness of the "prime" (8) is 10 μm.
17. A product according to claim 12-16, characterized in that the thickness of the metal surface (7) is 5-200 run.
18. A product according to claim 12-17, characterized in that the protective varnish layer on the underside of the product is 5 μm.
PCT/FI2008/050288 2007-05-24 2008-05-20 Method for coating transparent plastic products WO2008142207A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FI20070411A FI20070411A0 (en) 2007-05-24 2007-05-24 A method for manufacturing a solar cell
FI20070411 2007-05-24
FI20070682 2007-09-07
FI20070682A FI20070682L (en) 2007-05-24 2007-09-07 Procedure for surface coating transparent plastic products

Publications (1)

Publication Number Publication Date
WO2008142207A1 true WO2008142207A1 (en) 2008-11-27

Family

ID=38572880

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2008/050288 WO2008142207A1 (en) 2007-05-24 2008-05-20 Method for coating transparent plastic products

Country Status (2)

Country Link
FI (1) FI20070682L (en)
WO (1) WO2008142207A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104368511A (en) * 2014-11-13 2015-02-25 东莞广泽汽车饰件有限公司 Processing technology for plastic product surface pattern

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003066307A1 (en) * 2002-02-06 2003-08-14 Jari Ruuttu A method for improving the quality of e.g. an optic product, such as a mobile phone lens
WO2004011158A1 (en) * 2002-07-31 2004-02-05 Vision-Ease Lens, Inc. Spin application of thermally cured coatings
US20050175831A1 (en) * 2004-02-06 2005-08-11 Dong-Ryul Kim Plastic substrate having multi-layer structure and method for preparing the same
WO2006050230A2 (en) * 2004-10-28 2006-05-11 Nypro Inc. System, device, and method for producing thin plastic lenses
WO2006090000A1 (en) * 2005-02-23 2006-08-31 Pintavision Oy Workpiece comprising detachable optical products and method for manufacturing the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003066307A1 (en) * 2002-02-06 2003-08-14 Jari Ruuttu A method for improving the quality of e.g. an optic product, such as a mobile phone lens
WO2004011158A1 (en) * 2002-07-31 2004-02-05 Vision-Ease Lens, Inc. Spin application of thermally cured coatings
US20050175831A1 (en) * 2004-02-06 2005-08-11 Dong-Ryul Kim Plastic substrate having multi-layer structure and method for preparing the same
WO2006050230A2 (en) * 2004-10-28 2006-05-11 Nypro Inc. System, device, and method for producing thin plastic lenses
WO2006090000A1 (en) * 2005-02-23 2006-08-31 Pintavision Oy Workpiece comprising detachable optical products and method for manufacturing the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104368511A (en) * 2014-11-13 2015-02-25 东莞广泽汽车饰件有限公司 Processing technology for plastic product surface pattern

Also Published As

Publication number Publication date
FI20070682A0 (en) 2007-09-07
FI20070682L (en) 2008-11-25

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