TWI682951B - Method for preparing contact lens with hydrophilic functional group by applying plasma surface modification treatment - Google Patents

Abstract

The invention relates to a method for manufacturing a contact lens with a hydrophilic functional group by applying plasma surface modification treatment. The extrusion side surface of the male mold is used to generate a functional group film with a hydrophilic function through a plasma device The base material of the contact lens is added to the accommodating groove of the mold, and then the male mold and the female mold are combined with each other to make the base material squeezed to produce the shape of the contact lens. After forming, the male mold can be separated from the female mold to complete the production. The functional side film with a hydrophilic function is formed on the extrusion side surface of the male mold, so when the male mold is separated from the female mold, the male mold is It is not easy to stick to the surface of the cured substrate, so that it can quickly detach from the substrate, and at the same time reduce the stress on the surface of the substrate, thereby avoiding the occurrence of cracks and damage to the substrate, thereby improving the speed of the process and the product The purpose of yield.

Description

Method for preparing contact lens with hydrophilic functional group by applying plasma surface modification treatment

The invention relates to a method for manufacturing a contact lens with a hydrophilic functional group by applying a plasma surface modification treatment, in particular, a surface of the male mold has a functional group film with a hydrophilic function that can be generated through a plasma device, In this way, the male mold can be quickly detached from the substrate, thereby avoiding the occurrence of substrate cracking, damage, etc., thereby achieving the purpose of improving the process speed and product yield.

With the development and innovation of various electronic and electrical products, people have brought many conveniences in daily life and work, especially the advent of a large number of 3C electronic products, which has caused the popularization of applications in communications and the Internet. Many people are immersed in the field of use of 3C electronic products, and a large number of applications of 3C electronic products for a long time, whether they are office workers, student groups, middle-aged and elderly people, etc., also cover a very wide range, which leads to the phenomenon of low-headed people. As a result, the visual impairment and injury of many people's eyes are becoming more and more serious, and the population of myopia is relatively improved.

Furthermore, in order to solve the problem of myopia, most people currently wear glasses for myopia, contact lenses for myopia, corneal myopia surgery, or corrective lenses for keratoplasty. However, in order to wear comfort and beauty, most people will Choose to wear contact lenses, and the general contact lens manufacturing method is to add the basic material of contact lenses (such as polyhydroxyethyl methacrylate, etc.) to the groove of the lower mold first, and press the bumps of the upper mold Into the groove of the lower mold to make the base material Extruded into the shape of contact lenses, and then cured the basic material by curing equipment, and after curing is completed, the upper mold can be separated from the lower mold, thereby completing the manufacturing.

However, since the base materials of contact lenses are mostly sticky, when the bumps of the upper mold are separated from the cured base materials, the base materials are not easily separated from the bumps, so that a greater force must be applied to make The bumps are detached from the base material, which causes the surface of the base material to be subjected to greater stress, which in turn makes the base material prone to cracking, damage, etc., thereby affecting the overall manufacturing yield.

Therefore, how to solve the above-mentioned lack of inconvenience and inconvenience is the direction of improvement for those engaged in this industry.

Therefore, in view of the above-mentioned deficiencies, the inventors collected relevant information, evaluated and considered through many parties, and based on years of experience in this industry, through continuous trial and modification, they designed this application plasma surface modification treatment preparation He is the inventor of the invention patent for the manufacturing method of contact lenses with hydrophilic functional groups.

The main purpose of the present invention is that the plasma device can spray plasma onto the extrusion side surface of the male mold, so that the extrusion side surface generates a functional base film with a hydrophilic function and is accommodated in the receiving groove of the mother mold The base material of the contact lens is added, and then the male mold and the female mold are combined with each other, so that the base material is pressed to produce the shape of the contact lens, and then the base material can be cured and shaped by the curing device, and then the The male mold is separated from the female mold to complete the production. Because the extrusion side surface of the male mold has a functional base film with a hydrophilic function that can be generated through a plasma device, the functional base film with a hydrophilic function can be used to make the male When the mold is detached from the master mold, the male mold is not easy to stick to the surface of the cured substrate, so that it can quickly detach from the substrate, and at the same time reduce the stress applied to the surface of the substrate In order to avoid the occurrence of substrate cracking, damage, etc., in order to achieve the purpose of improving the process speed and product yield.

The secondary purpose of the present invention is that in the process of combining the male mold with the female mold, the surface of the base material will be attached with a functional group with a hydrophilic function on the surface of the male mold, so when the base material is cured and formed, the cured base The surface of the material can also have a hydrophilic function to achieve the purpose of improving the comfort when wearing.

Another object of the present invention is that the plasma device can be processed on the extrusion side surface of the male die by using argon plasma, and the argon plasma can only cause the surface of the extrusion side to have a hydrophilic function The functional-based film prevents the male mold from being etched, thereby achieving the purpose of maintaining accuracy and product yield during production.

Another object of the present invention is that the plasma device is a plurality of coating heads with plasma spraying in a conventional reciprocating manner, and the plurality of coating heads can raise the extrusion side surface of the male mold to produce a functional-based film with a hydrophilic function The speed, and the reciprocating rotation can improve the uniformity of the functional base film with a hydrophilic function, so that the extrusion side surface of the male die can quickly and stably generate the functional base film with a hydrophilic function.

1‧‧‧ male model

11‧‧‧Squeeze side

12‧‧‧stop block

2‧‧‧Master

21‧‧‧Accommodation slot

22‧‧‧step

3‧‧‧Plasma device

30‧‧‧Plasma

31‧‧‧Coating head

4‧‧‧Add device

5‧‧‧ Base material

6‧‧‧curing device

The first figure is a flowchart of the present invention.

The second figure is a schematic diagram of the operation of the present invention (1).

The third figure is a schematic diagram of the operation of the present invention (2).

The fourth figure is a schematic diagram of action (3) of the present invention.

The fifth figure is a flowchart of another embodiment of the present invention.

In order to achieve the above-mentioned objectives and effects, the technical means and structure adopted by the present invention, the drawings and details of the preferred embodiments of the present invention are described in detail below. Their features and functions are as follows, so that they can fully understand.

Please refer to the first, second, third, and fourth diagrams, which are the flow charts and action diagrams (1), (2) and (3) of the present invention. It can be clearly seen from the figures that the present invention applies plasma surface modification The manufacturing method for processing and preparing contact lenses with hydrophilic functional groups can be performed according to the following steps:

(A) First, the plasma device 3 can be used to process the plasma 30 on the surface of the extrusion side 11 of the male mold 1 so that the surface of the extrusion side 11 of the male mold 1 produces a functional-based film having a hydrophilic function.

(B) By adding the device 4, the base material 5 of the contact lens is built into the accommodating groove 21 of the master mold 2.

(C) The male mold 1 and the female mold 2 are combined with each other, so that the extrusion side 11 of the male mold 1 is pressed into the accommodating groove 21 of the female mold 2, and the base material 5 is pressed to produce contact lenses shape.

(D) The substrate 5 can be cured and formed by the curing device 6 and the male mold 1 is separated from the female mold 2 to complete the production of contact lenses.

In the above step (A), the extrusion side 11 of the male mold 1 is convexly arc-shaped, and a plurality of stoppers 12 are provided around the extrusion side 11, and in this step (B), the accommodating groove 21 of the female mold 2 It is in a concave arc shape, and a step surface 22 for stopping on the plurality of stop blocks 12 is provided around the accommodating groove 21.

In the above step (A), the plasma 30 of the plasma device 3 may be an argon plasma, and the plasma device 3 has a plurality of coating heads 31 capable of reciprocating rotation. The plasma 30 is sprayed in a reciprocating rotation, and the parameters in the plasma device 3 can be used according to the following settings. The distance between the plasma device 3 and the extrusion side 11 of the male die 1 can be between 1~5 cm, and the working gas flow rate of the plasma device 3 can be between 1~5L/min, and the carrier gas flow rate can be between 5~15sccm. The output power can be between 60 and 100 watts, and the surface of the extrusion side 11 of the male die 1 can be surely formed with a hydrophilic functional thin film by setting the above parameters.

Furthermore, the substrate 5 in the above step (B) may be polyhydroxyethyl methacrylate (HEMA), silicone hydrogel (Silicon Hydrogel) or other materials for making contact lenses.

However, the curing device 6 in the above step (D) can be a thermal curing device, a UV light curing device, or other curing device 6 that can cure and shape the substrate 5, and the curing device 6 can be made according to the characteristics of the substrate 5 Choose to use (for example: the substrate 5 contains a UV curing absorbent, the curing device 6 can be a UV light curing device); and the curing device 6 is preferably heated or irradiated to the male mold 1 and 360 ° The surface of the master mold 2 allows the substrate 5 to uniformly generate a curing reaction, but in practical applications, it is not limited to this, and the curing device 6 only needs to be capable of curing the substrate 5 to form.

The preferred embodiment of the present invention uses the plural coating heads 31 of the plasma device 3 to spray the argon plasma 30 uniformly on the surface of the extrusion side 11 of the male die 1 in a convoluted manner. , The surface modification reaction occurs on the surface of its extrusion side 11, thereby making the extrusion A functional group film with a hydrophilic function is formed on the surface of the pressing side 11, and then the liquid contact lens substrate 5 is added into the accommodating groove 21 of the female mold 2 through the adding device 4, and the male mold 1 is combined downward The female mold 2 further presses the extrusion side 11 of the male mold 1 into the accommodating groove 21 of the female mold 2, and at the same time, the plurality of stop blocks 12 of the male mold 1 are subjected to the step surface 22 of the female mold 2 Stop, and the substrate 5 located in the accommodating groove 21 will be squeezed to assume the shape of a contact lens, and then the squeezed substrate 5 can be cured by the curing device 6 and the substrate 5 is to be cured After that, the male mold 1 can be detached upward from the female mold 2, so that the extrusion side 11 of the male mold 1 is separated from the cured substrate 5 due to the argon plasma on the surface of the extrusion side 11 of the male mold 1 The injection of 30 produces a functional base film with a hydrophilic function, so when the extrusion side 11 of the male mold 1 is separated from the cured substrate 5, it is not easy to stick to the surface of the substrate 5, thereby making the male mold 1 can be quickly detached from the substrate 5, and at the same time can reduce the stress applied to the surface of the substrate 5, thereby achieving the effect of avoiding damage and destruction of the substrate 5.

Furthermore, after the male mold 1 is separated from the female mold 2, it is preferable to add saline, phosphate buffered saline (Phosphate Buffer Saline; PBS) or other hydration materials in the accommodating tank 21 of the female mold 2 , In order to hydrate the cured substrate 5, but in actual application, the cured substrate 5 in the storage tank 21 can also be taken into another packaging container (not shown in the figure) and placed in the packaging container A hydration material is added to hydrate the cured substrate 5, and after the substrate 5 to be cured is hydrated, packaging, packaging and other steps can be performed to make a contact lens product.

Please refer to the fifth figure again, which is a flowchart of another embodiment of the present invention. It can be clearly seen from the figure that the present invention can perform the following steps before step (A): (A01) is The plasma device 3 can be used to process the plasma 30 on the master mold In the accommodating groove 21 of 2, a functional base film having a hydrophilic function is generated on the inner surface of the accommodating groove 21 of the master mold 2.

In another embodiment of the present invention, after a functional base film having a hydrophilic function is generated on the inner surface of the accommodating groove 21 of the master mold 2, the cured substrate 5 can be easily taken out of the accommodating groove 21 of the master mold 2 It is further avoided that the cured substrate 5 is broken or damaged.

The present invention has the following advantages:

(1) The surface of the extrusion side 11 of the male mold 1 can be used to generate a functional group film with a hydrophilic function through the plasma device 3, that is, the male mold 1 can be separated from the mother through the functional group film with a hydrophilic function When mold 2, the male mold 1 is not easy to stick to the surface of the cured substrate 5, so that it can quickly detach from the substrate 5, and at the same time reduce the stress on the surface of the substrate 5 to avoid cracking and damage of the substrate 5 When such circumstances occur, the effect of increasing the process speed and product yield is achieved.

(2) The surface of the extrusion side 11 of the male mold 1 is formed with a functional film with a hydrophilic function. When the extrusion side 11 is pressed in, the surface of the substrate 5 is attached with a hydrophilic function Functional groups, so after the base material 5 is cured and formed, the surface of the cured base material 5 may also have a hydrophilic function to improve the comfort when wearing.

(3) The plasma device 3 can be processed on the surface of the extrusion side 11 of the male mold 1 by using the argon plasma 30, and the penetration of the argon plasma 30 only makes the surface of the extrusion side 11 hydrophilic The functional functional thin film can prevent the male mold 1 from being etched, thereby maintaining the accuracy and product yield during production.

(4) The plasma device 3 is capable of spraying the plasma 30 in a reciprocating rotation through a plurality of coating heads 31, and the plurality of coating heads 31 can raise the extrusion of the male mold 1 The speed at which the functional-based film with hydrophilic function is generated on the surface of the side 11 and the uniformity of the functional-based film with hydrophilic function can be improved by reciprocating rotation, so that the surface of the extrusion side 11 of the male die 1 is fast, The utility model can stably generate functional film with hydrophilic function.

The above detailed description is for the description of a preferred feasible embodiment of the present invention, but this embodiment is not intended to limit the scope of the patent application of the present invention. Any other changes and modifications made without departing from the spirit of the art disclosed by the present invention Changes should be included in the scope of patents covered by the present invention.

In summary, the above-mentioned method for preparing contact lenses with hydrophilic functional groups by applying plasma surface modification treatment of the present invention in practical application and implementation, in order to indeed achieve its efficacy and purpose, the present invention is truly an excellent practicality In order to meet the requirements of the invention patent application, I filed an application in accordance with the law. I hope the review committee will grant this case as soon as possible to protect the inventor’s hard research and development and creation. If there is any doubt in the review committee of the Jun Bureau, please feel free to write instructions People must try their best to cooperate, really feel virtuous.

Claims (3)

A method for manufacturing a contact lens with a hydrophilic functional group by applying plasma surface modification treatment can be performed according to the following steps: (A) The plasma device is used to process the plasma in the accommodating groove of the mother mold, so that The inner surface of the accommodating groove of the master mold produces a functional-based film with a hydrophilic function. The plasma device can be used to process the plasma on the extrusion side surface of the male mold to produce the extrusion side surface of the male mold. A functional base film with a hydrophilic function, the plasma device is a plurality of coating heads with reciprocating swirling spray plasma, the distance between the plasma device and the extrusion side of the male die is between 1 and 5 cm, and The working gas flow rate of the plasma device is between 1~5L/min, the carrier gas flow rate is between 5~15sccm and the output power is between 60~100 watts; (B) and through the addition device The base material of the contact lens comes from the accommodating groove of the female mold; (C) The male mold and the female mold are combined with each other, so that the extrusion side of the male mold is pressed into the accommodating groove of the female mold, and then The substrate is pressed to produce the shape of a contact lens. The extrusion side of the male mold is convex arc-shaped, and a plurality of stoppers are provided around the extrusion side, and the receiving groove of the female mold is Concave arc shape, and there are steps around the accommodating groove for stopping on the plurality of stop blocks; (D) the base material can be cured and shaped by the curing device, and the male mold is separated from the female mold The curing device is a thermal curing device, UV light curing device, or other curing device that can cure and shape the substrate. The method for manufacturing contact lenses with hydrophilic functional groups by applying plasma surface modification treatment as described in item 1 of the patent scope, wherein the plasma of the plasma device in step (A) is argon gas Pulp. As described in item 1 of the patent application scope, a method for manufacturing a contact lens with a hydrophilic functional group by applying plasma surface modification treatment, wherein the substrate in step (B) is polyhydroxyethyl methacrylate, silicone glue or Other materials for making contact lenses.

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