KR101263641B1 - The ultem thin-film coating layer formed on the surface of how frames - Google Patents

Abstract

PURPOSE: A thin film forming method for an Ultem glass frame is provided to improve the quality of the Ultem glass frame including a high tensile strength, stability for skin, abradability, luster integrity, etc. CONSTITUTION: A thin film forming method for Ultem glass frame comprises the following steps: forming a thin metal film on the Ultem glass frame; forming a primer coating layer on the thin metal film; coating a surface finishing layer on the primer coating layer; and forming a color transfer layer(50) by adding a pigment on the primer coating layer in the step of forming the primer coating layer or by pressurizing a transcription paper on the surface finishing layer. [Reference numerals] (AA) Start; (BB) Surface active agent treating step; (CC) Plasma surface treating step; (DD) Metal thin film layer forming step; (EE) Primer coating step; (FF) Surface finishing layer coating step; (GG) Drying process; (HH) Form a color transfer layer; (II) End

Description

The Ultem thin-film coating layer formed on the surface of how frames}

The present invention relates to the formation of a thin film coating layer for improving the difficult paintability on the surface of the spectacle frame made of ultem (polyetherimide) and its processing method.

The spectacle frame is basically not only light and harmless to the human body, but also needs to be comfortable to wear, and in particular, requires excellent elasticity and a high degree of warpage that does not easily break.

As a representative frame material for satisfying this, alloy materials such as titanium (Ti) have been used a lot, but manufacturing and production costs including material costs are so high that they have to be sold at high prices. The production of eyeglass frames using Ultem material, which is more advantageous to the fastness of the design, the design (shape, color, pattern, etc.) and the infinite change demands of the consumers, has been greatly attracting attention.

That is, the official chemical name polyetherimide (PEI), a thermoplastic special engineering plastic, is called abbreviation "PEI", and is "Ultem" which has been used since its distribution in the United States, which was first developed in the market. (Ultem) "(hereinafter referred to herein as " ultem " ).

Ultem resin eyeglass frames are extremely light and have a high mechanical strength comparable to that of alloy materials. They also have excellent flexural modulus that does not break easily even when bent at 180 °. Glass transition temperature of 217 °), long-term heat index (RTI, 170) and high temperature drying (110-160) are possible, excellent smoke resistance, low smoke generation (in compliance with ABD, FAR, NBS regulations), excellent dimensional stability (creep And low sensitivity and uniform coefficient of thermal expansion)
On the surface of Ultem spectacle frames, the surface coating process for beautiful decoration, texture, and surface protection is very complicated and difficult, and despite the considerable research and efforts in the field of spectacle frame manufacturing, it has not been able to produce perfect products yet. It's going crazy. The cause is that the thinner is added to a commercial paint to adjust the viscosity to perform a spraying process. The thinner used is mixed with various organic solvents, and the types of mixtures are alcohols, esters, ethers, ketones, etc. As it is mixed with hydrocarbons, the surface of the Ultem spectacle frame is directly contacted with the mixed thinner, so that the gradual reforming changes and cracks or breaks occur. There is a fatal problem because it can be seen that it is easily broken in the handling process after a certain period of time.
As a result, there are many companies that produce Ultem eyeglass frames using only precision surface polishing technology without coating.

delete

delete

delete

delete

delete

Accordingly, in the present invention, in order to provide a reasonable method for sufficiently protecting and maintaining the disadvantages of the Ultem spectacle frame (vulnerable to organic solvents), a beautiful metal thin film layer is obtained on the surface of the Ultem spectacle frame, which is a synthetic resin, and the thin film is formed. In addition to exhibiting excellent adhesion through the effective treatment of Ultem material, the quality improvement including high tensile strength, skin safety, wear and gloss integrity, etc. is achieved through the excellent physical properties of the coating applied thereon and the formation of an advantageous coating layer. The technical problem is presented with a focus on providing a new method of forming a thin film coating layer of Ultem spectacle frame with high fastness that can contribute greatly to the process.

The present invention for achieving the above technical problem is the surface of the injection molded uncoated Ultem (Ultem) spectacle frame, after the surface active agent treatment step for removing the fine foreign substances that may remain due to various causes, through the modification of the surface Plasma treatment is performed continuously to increase the adhesion of the thin film, and the surface of the modified Ultem material is chromium (Cr), nickel (Ni), stainless steel (Sus), titanium (Ti), etc. by vacuum deposition. Performing at least one metal thin film layer forming step selected from among high purity metal materials, including a primer coating layer forming step to increase adhesion between the metal thin film and the surface finish layer to be described later, and (if necessary) Color can be produced by the addition of a pigment), the surface of the primer coating layer to prevent discoloration and to maintain good fastness It was done by performing a layer coating step.

In the method of forming a thin film coating layer on the surface of the Ultem material of the present invention, a metal thin film layer is formed on the surface of the Ultem spectacle frame by which the coating is not realized by vacuum evaporation, so that the Ultem is sufficiently wrapped and blocked. Since the primer coating layer and the surface finishing layer are sequentially coated in the state, it is possible to reliably protect the Ultem material, which is vulnerable to chemical resistance, from the polar organic solvent included in the coating layer, and thus the excellent material possessed by the Ultem material. Indeed, it is a great invention that the performance and performance of functions can be sustained.

1 is a process chart showing a preferred embodiment of the present invention
2 is a structure of a coating film formed on the ultem material in turn
Figure 3 is another embodiment of the structure further formed a color transfer layer

~ 1000

범위 내로 하는 것이 바람직하다.
이렇게, 울템(Ultem) 안경테 표면에 직접적으로 금속박막층(20)을 증착하는 것은 이후 단계에서 실시되는 도막에 구성되어 있는 용매와의 직접적인 접촉을 피할 수 있도록 함으로서, 극성의 유기용제로부터 내약품성에 취약한 울템(Ultem) 소재의 보호와 함께 도장성이 한층 자유로워지는 등 상당한 이점이 제공된다.

또한, 상기 금속박막층(20) 위에는, 그 금속박막층(20)과 후속처리가 필요한 상부의 표면마감층(40) 사이에 그 밀착성을 높이기 위해 일정 두께의 프라이머도막층(30)을 형성시키는 프라이머도포단계를 실시하게 되는 데,

상기 프라이머도막층(30)의 구성 성분은 아래 표 1과 같이, 총 100wt%에 대하여 에스테르 수지 18 ~ 20wt%, 멜라민 수지 1 ~ 3wt%, 포름알데히드 0.1wt%, 솔벤트 나프타 2 ~ 5wt%, 이소프로필 알코올 6 ~ 7wt%, 톨루엔 28.8wt%, 메틸 에틸 케톤 6.6wt%, 시클로헥사논 30 ~ 33wt%, 이소부탄올 1 ~ 3wt% 가 혼합된 것이다.Ultem spectacle frame surface thin film coating layer forming method of the present invention will be described in detail as shown in Figures 1 to 3 attached,

First, a surface active agent treatment step is performed on the surface of the injection-molded Ultem spectacle frame to first remove the fine foreign substances that may remain due to various causes with the surface active agent .

Next, the surface of the surface treated Ultem material (Ultem) material, as well as to remove the secondary particles of the ultra-fine particles that have not been completely processed in the surface treatment step, of course, in particular through the effective modification of the Ultem material of the thin film Implement a high voltage plasma treatment step that greatly aids adhesion buildup.

On the surface of the Ultem spectacle frame modified through the high voltage plasma treatment step, a metal thin film layer having a constant thickness to reliably block, isolate, and protect the Ultem material, which is extremely vulnerable to chemicals, from the polar solvent of the subsequent coating layer. Forming 20 The metal thin film layer forming step is performed,

In this case, the metal thin film layer 20 may be formed by evaporating one or more high-purity metal materials selected from chromium (Cr), nickel (Ni) stainless steel (Sus), and titanium (Ti) in a high vacuum region of 10-4 Torr or more using a vacuum evaporator. The thickness of the metal thin film layer 20 is 500 depending on the selected metal, although there is a slight difference.

To 1000

It is preferable to carry out in a range.
Thus, depositing the metal thin film layer 20 directly on the Ultem spectacle frame surface avoids direct contact with the solvent comprised in the coating film carried out in a later step, thereby making it vulnerable to chemical resistance from polar organic solvents. Significant advantages are provided, such as greater freedom of paintability with protection of Ultem materials.

In addition, on the metal thin film layer 20, a primer coating for forming a primer coating layer 30 having a predetermined thickness in order to increase the adhesion between the metal thin film layer 20 and the upper surface finishing layer 40 that requires subsequent processing. To take steps ,

The components of the primer coating layer 30, as shown in Table 1 below, with respect to the total 100wt% ester resin 18 ~ 20wt%, melamine resin 1 ~ 3wt%, formaldehyde 0.1wt%, solvent naphtha 2 ~ 5wt%, iso 6-7 wt% of propyl alcohol, 28.8 wt% of toluene, 6.6 wt% of methyl ethyl ketone, 30-33 wt% of cyclohexanone, and 1 to 3 wt% of isobutanol.

delete

delete

delete

delete

delete

delete

delete

Material name Content (wt%) Ester resin 19 to 22 Melamine resin 1-4 Formaldehyde 0.1 Solvent naphtha 2 to 5 Isopropyl alcohol 6 to 9 Toluene 29.8 Methyl ethyl ketone 6.6 Cyclohexanone 31 to 34 Isobutanol (butyl alcohol) 1-4 gun 100 (wt%)

Subsequently, on the primer coating layer 30, a surface finish layer coating step of forming a surface finish layer 40 to maintain a certain fastness together with decolorization prevention and surface protection is further performed.
At this time, the composition of the surface finishing layer 40 is made of acrylic resin 35 ~ 45wt%, melamine resin 10 ~ 25wt%, xylene 35 ~ 45wt%, solvent naphtha 2 ~ 8wt%, mixed paint.

delete

Material name Content (wt%) Acrylic Resin 25 to 35 Melamine resin 10-20 Xylene 35-45 Solvent naphtha 2 to 5 gun 100 (wt%)

The coating method of the primer coating layer 30 and the surface finishing layer 40 is applied by a conventional spray injection method, the thickness thereof is ideally applied to 8 to 25, respectively.

When the method for forming the Ultem spectacle frame surface thin film coating layer of the present invention is summarized, the surface active agent treatment step plasma treatment step metal thin film deposition step primer coating step surface finish layer coating step drying step, as a result Ultem (Ultem) From the spectacle frame surface 10, the metal thin film layer 20, the primer coating layer 30, and the surface finishing layer 40 are formed.

The above process can finish the method for forming the Ultem spectacle frame surface thin film coating layer of the present invention, but in the case of applying a color for a higher decoration, any one selected from the following two color treatment processes It can be carried out in a method.

One method is to include a color in the primer coating layer 30 during the primer coating step. In this case, when the pigment is dissolved in a solvent and 0.5 to 6 wt% is added to the primer constituent solution, the color is applied together with the primer coating. Can be obtained simultaneously.

Another method is to adhere the transfer paper (film) containing a pattern and color variously designed with a sublimable dye on the surface finish layer 40 to the surface finish layer 40, and then to about 110 to 160 By pressing for about 2 to 8 minutes at a high temperature, a colorful color transfer layer 50 may be obtained on the surface finish layer 40 due to the transfer of colors and patterns designed on the transfer paper (transfer film).

delete

delete

delete

delete

delete

10: Ultem spectacle frame 20: metal thin film layer
30: primer coating layer 40: surface finishing layer
50: color transfer layer

Claims (4)

The official chemical name is polyetherimide (PEI), but in this field, on the surface of the Ultem spectacle frame 10 commonly referred to as Ultem,

Performing a " metal thin film layer forming step" of forming a metal thin film layer 20 having a constant thickness, which can avoid direct contact with a solvent through a vacuum evaporator and become more free of paintability;

On the metal thin film layer 20, 18 to 20 wt% ester resin, 1 to 3 wt% melamine resin, 0.1 wt% formaldehyde, 2 to 5 wt% solvent naphtha, 6 to 7 wt% isopropyl alcohol, 28.8 wt% toluene, methyl ethyl Performing a “ primer coating step” for forming a primer coating layer 30 containing 6.6 wt% of ketone, 30 to 33 wt% of cyclohexanone, and 1 to 3 wt% of isobutanol;

On the primer coating layer 30, a " surface finish " for applying a surface finish layer 40 in which acrylic resin 35 to 45 wt%, melamine resin 10 to 25 wt%, xylene 35 to 45 wt%, and solvent naphtha 2 to 8 wt% is mixed Layer coating step " ;

In the primer coating step of forming the primer coating layer 30, to the physical properties of the primer coating layer 30, by adding a pigment of 0.5 ~ 6wt% to produce a color, or the surface finish layer 40 The transfer paper (film) in which the pattern and color are designed with a sublimable dye on the close contact and then pressurized for 2 to 8 minutes at a temperature of 110 ℃ ~ 160 ℃ to produce a color by a transfer method to form a color transfer layer (50) Performing a “ color processing step” of any one of the selected ones; Method for forming a thin film coating layer on the surface of the Ultem spectacle frame. delete delete delete

Images