KR102130917B1 - Protection Film For LED Light Diffuser and Manufacturing Method Thereof - Google Patents

Abstract

The present invention relates to a protective film for an LED lighting diffusion plate and a manufacturing method thereof. According to the present invention, the manufacturing method of the protective film for an LED lighting diffusion plate comprises: a base film layer manufacturing step; a corona treatment step; a light diffusion composition coating step; an aqueous acrylic emulsion adhesive manufacturing step; an aqueous acrylic emulsion adhesive coating step; a uniformizing step; a wax coating step; a hot air drying step; a static electricity removing step; a winding step; and an aging and curing step. According to the present invention, the physical properties of a protective film can be improved.

Description

Protection film for LED light diffusion plate and its manufacturing method{Protection Film For LED Light Diffuser and Manufacturing Method Thereof}

In the present invention, by applying a water-soluble acrylic emulsion-based adhesive to the film and aging and curing, it is possible to improve the physical properties of the protective film by preventing air bubbles, tunneling and lifting, and emitting light provided by the light source by applying a light diffusion bead. And protection for the LED light diffuser, which can diffuse and fill the light-diffusing beads of the porous structure with particles of the insect-repelling effect to gradually release particles into the atmosphere to effectively eradicate and eradicate harmful insects gathering around the light. It relates to a film and a manufacturing method thereof.

It is composed of throwing force, cohesive force, adhesive force, and tack as strength constitution diagram of the adhesive layer. Keying means the bonding force between the support and the adhesive, and can be maximized when the base film surface is treated with corona or primer. Cohesion refers to the strength of the adhesive itself, and depends on the molecular spacing, crosslinking degree, molecular connection, and molecular weight of the components used as the adhesive.

Adhesion refers to the peeling force, which is related to the adhesive force at the interface with the adhesive and the magnitude of the viscoelastic deformation energy of the adhesive, and is practically a criterion for whether the attached protective film falls off. Tack refers to the property that wets the adherend well, and can be seen as the ease of attaching the protective film to the other object, such as surface adhesion and initial adhesion.

The pressure-sensitive adhesive having the above properties exhibits neither a solid nor a liquid state. That is, the pressure-sensitive adhesive is a semi-fluid that is an intermediate state between a stable solid and an unstable liquid (solution) and has metastable properties. It is recognized that the term metastableness necessarily indicates changes over time.

On the other hand, the adhesive that is considered to be the most ideal should not move with a little force. Therefore, to adhere the protective film to the adherend and remove the adhesive without leaving it on the other adherend, it is necessary that the size of the properties of the adhesive be configured as follows.

Throwing force 〉Cohesive force 〉Adhesive force 〉Tech

However, it is not easy to obtain a physical property value suitable for the purpose by taking a good balance of the strength of each property of the above-mentioned pressure-sensitive adhesive.

In lighting, it is common to attach a protective film in the production process. The protective film is intended to protect the surface of the lighting. During the processing process, the phenomenon occurs in the air due to air bubbles, tunneling and excitation due to the deterioration of the solvent resistance and physical properties of the protective film. There is a problem that a large amount of loss occurs due to contamination of the adhesive layer and contamination and shape deformation due to residual solvents.

The light from the LED (Light Emitting Diode) lamp hits the diffuser plate and diffuses the light. The diffused light must have excellent diffusive transmittance as well as excellent refractive transmittance. However, the protective film for the diffuser used in the past is between the layers of low density polyethylene film. Many films have been used for imparting pressure-sensitive adhesives.

However, in the case of the existing general low-density polyethylene-based protective film, when the diffuser plate is processed into a flat plate and stored or transported, the workability is poor and the loss is great, and the peeling force of the protective film due to excitation or change over time Problems, such as rising, have been pointed out. In addition, in the case of a protective film applied with an existing acrylate, there was a problem in that the adhesive remains on the diffusion plate and is contaminated when the protective film is peeled off.

In addition, the existing diffusion plate protection film is for protecting the surface of the diffusion plate. During the processing process, airborne and foreign matters were mixed due to the occurrence of bubbles, tunnel phenomenon, and floating phenomenon due to the decrease in heat resistance and physical properties of the protective film, and the adhesion layer was destroyed. (Agglomeration, interface, etc.) Contamination and shape deformation occurred in the diffusion plate due to the phenomenon and residual solvent, resulting in a lot of loss.

In addition, the conventional protective film for LED light diffusion plates is exposed to environmental problems by grafting a protective film containing volatile organic compounds (VOC).

Republic of Korea Registered Patent No. 10-1135090

The present invention is to solve the above problems, by applying a water-soluble acrylic emulsion-based adhesive to the corona layer of the base film and aged and cured to prevent air bubbles, tunneling and lifting, thereby improving the properties of the protective film. , It is an object to provide a protective film for the LED light diffusion plate and a manufacturing method thereof.

Another object of the present invention is to provide a protective film for an LED light diffusion plate and a manufacturing method thereof, which can emit and diffuse light provided from a light source by applying a light diffusion bead.

Another object of the present invention is to diffuse the LED light, which can gradually release particles showing the insect repellent effect into the atmosphere by filling the repellent composition with a light-diffusing bead having a porous structure in order to effectively eradicate and eradicate harmful insects gathered around the light. It is to provide a protective film for a plate and a manufacturing method thereof.

The configuration of the present invention as a means for achieving the above object is a low-density polyethylene (LDPE) single layer laminated on the outer surface and the inner surface centered on a single layer of linear low-density polyethylene (LLDPE) base film layer made of 30 ~ 80㎛ thickness Preparing a; Corona-treating one surface of the base film layer under conditions ranging from 40 to 46 dyne/cm; Coating a light diffusion composition on one surface of the base film layer that is not corona treated; Prepare an aqueous acrylic emulsion adhesive by mixing 60 to 90 parts by weight of the adhesive-reinforced monomer, 2 to 15 parts by weight of the cohesive-strengthened monomer, 2 to 25 parts by weight of the crosslinking monomer, 0.5 to 3 parts by weight of an isocyanate curing agent, and 5 to 30 parts by weight of water To do; Applying 10 to 18 g of an aqueous acrylic emulsion pressure-sensitive adhesive per 1 m 2 to one surface of the corona-treated base film layer using a mesh roller composed of diagonal cells; Homogenizing both surfaces of the base film layer coated with the light-diffusing composition and the aqueous acrylic emulsion adhesive using a rotating bar; Applying a wax to one surface of the base film layer in which the light diffusion composition is homogenized; Drying the base film layer coated with the water-based acrylic emulsion pressure sensitive adhesive at a pressure of 0.8 kgf/cm 2 with a drying temperature cycle divided into 90° C. to 105° C. to 115° C. to 110° C. to 90° C. sections; Removing static electricity from the film layer on which the adhesive layer is formed; Winding the static-removed film layer using a rolling roller equipped with silicone having a hardness of 40 to 60 A and having a crown treatment of 1.5 to 2 degrees; And aging and curing the wound film layer in a range of 50 to 70° C. for 12 to 72 hours.

The composition of the present invention, the step of applying the above-mentioned light-diffusion composition, based on 100 parts by weight of the total composition, 40 to 48 parts by weight of calcium carbonate, 30 to 35 parts by weight of light-diffusing beads, 11 parts by weight of silicic acid, 1 to stabilizer It is preferable to use a light-diffusing composition containing 3 parts by weight.

The configuration of the present invention, the above-mentioned light-diffusion beads, the micropore is connected at regular intervals, and includes an outer wall in which a spherical separation space is formed, and an insect repellent composition filled in the spherical separation space inside the outer wall. , 120 ~ 180 mesh particle size is preferred.

In the configuration of the present invention, the step of preparing the above-mentioned aqueous acrylic emulsion pressure sensitive adhesive uses at least one of butyl acrylate, decyl acrylate, isopropyl acrylate, and 2-ethylhexyl acrylate as the adhesion-enhancing monomer, and cohesive force. At least one of methyl methacrylate and pentyl methacrylate is used as the reinforcing monomer, hydroxyethyl methacrylate is used as the crosslinking monomer, and isoprondiisocyanate, hexamethylenediisocyanate, and tolenedi are used as isocyanate curing agents. It is preferable to use at least one of isocyanates.

In the configuration of the present invention, the step of applying the above-described aqueous acrylic emulsion pressure-sensitive adhesive, the step of raising the pressure-sensitive adhesive while rotating the mesh roller is composed of cells diagonally; Interlocking the adhesive inserted into the cell of the mesh roller and transferring it to the surface of the rotating rubber roller; It is preferable to include the step of applying a pressure-sensitive adhesive rubber roller to the surface of the corona-treated base film layer to apply the pressure-sensitive adhesive.

In the configuration of the present invention, the step of homogenizing both surfaces of the base film layer described above comprises: first uniformizing the surface of the base film layer using a rotating bar having a rotational speed of 1500 to 1800 m/min; And it is preferable that the first uniformized base film layer surface comprising the step of uniformly secondary using a rotating bar of a rotational speed of 600 ~ 900 m / min.

The protective film for the LED light diffusion plate according to the present invention can be applied to the actual industry, and it is possible to improve the physical properties of the protective film by preventing air bubbles, tunneling and excitation by applying and curing the water-soluble acrylic emulsion-based adhesive on the film. In addition, by applying a light-diffusing bead, the light provided from the light source can be emitted and diffused, and the insect-repellent composition is filled with a light-diffusing bead having a porous structure to effectively eradicate and eradicate harmful insects gathered around the light, thereby exhibiting an insect repellent effect. Particles can slowly release into the atmosphere.

1 is a flow chart of a method of manufacturing a protective film for an LED light diffusion plate according to the present invention.
2 is a cross-sectional view of a light diffusing bead according to this invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to describe in detail that a person skilled in the art to which the present invention pertains can easily implement the present invention. Other objects, features, and operational advantages, including the objects, actions, and effects of this invention will be more apparent from the description of the preferred embodiment.

For reference, the embodiments disclosed herein are merely selected and suggested the most preferred embodiments among the various possible examples to assist the understanding of those skilled in the art, and the technical spirit of the present invention is limited or limited only by the presented embodiments No, it is revealed that various changes, additions, and changes are possible within a range that does not depart from the technical spirit of the present invention, and that other exemplary embodiments are possible.

In addition, the term or word expression used in the specification and claims is defined based on the principle that the inventor can appropriately define the concept of a term in order to best describe his or her invention. It should not be interpreted as being limited only to a dictionary or a meaning, and it should be interpreted as a meaning and a concept corresponding to the technical idea of the present invention. As an example, a singular expression includes a plural expression unless the context clearly indicates otherwise.

1 is a flow chart of a method of manufacturing a protective film for an LED light diffusion plate according to the present invention.

As shown in Figure 1, the configuration of the method of manufacturing a protective film for an LED light diffusion plate according to the present invention, a single layer of low density polyethylene (LDPE) is laminated on the outer surface and the inner surface around a single layer of linear low density polyethylene (LLDPE) Preparing a base film layer made of 30 ~ 80㎛ thickness (S10); Corona treatment on the one side of the base film layer in the condition of 40 to 46 dyne/cm (S20); Applying a light-diffusing composition to one surface of the base film layer that is not corona treated (S30); Prepare an aqueous acrylic emulsion adhesive by mixing 60 to 90 parts by weight of the adhesive-reinforced monomer, 2 to 15 parts by weight of the cohesive-strengthened monomer, 2 to 25 parts by weight of the crosslinking monomer, 0.5 to 3 parts by weight of an isocyanate curing agent, and 5 to 30 parts by weight of water Step (S40); Applying 10 to 18 g of an aqueous acrylic emulsion pressure-sensitive adhesive per 1 m2 on one surface of the corona-treated base film layer using a mesh roller composed of diagonal cells (S50); Homogenizing both surfaces of the base film layer coated with the light-diffusing composition and the aqueous acrylic emulsion adhesive using a rotating bar (S60); Applying a wax to one surface of the base film layer in which the light diffusion composition is homogenized (S70); Drying the base film layer coated with the water-based acrylic emulsion adhesive at a pressure of 0.8 kgf/cm 2 with a drying temperature cycle divided into 90°C → 105°C → 115°C → 110°C → 90°C (S80); Removing static electricity of the film layer on which the adhesive layer is formed (S90); Winding the static-removed film layer using a rolling roller equipped with silicon having a hardness of 40 to 60 A and having a crown treatment of 1.5 to 2 degrees (S100); And aging and curing the wound film layer in the range of 50-70° C. for 12-72 hours (S110).

In the step (S10) of manufacturing the base film layer, when the film is composed of only low-density polyethylene (LDPE), the tensile strength and impact resistance are weak, so the low-density is centered around the linear low-density polyethylene (LLDPE) layer, which has better rigidity than LDPE. Polyethylene (LDPE) is composed of multiple layers.

The base film layer has a thickness in the range of 30 to 80 μm, preferably 40 to 70 μm. When the thickness of the base film layer is less than 30 μm, deformation due to external force can easily come during the manufacturing process, and when the thickness is greater than 80 μm, the rigidity is too large to cause uniform adhesion and excitement. This is undesirable because it can occur.

In the step (S10) of preparing the base film layer, the linear low-density polyethylene and the low-density polyethylene may further include 0.5 to 5 parts by weight of a neutralizing agent and 0.5 to 5 parts by weight of an antioxidant based on 100 parts by weight of a polyethylene resin.

The antioxidant imparts long-term radical stability of the base film layer. When the amount of the antioxidant input is less than 0.5 part by weight, long-term radical stability is lowered, and when it exceeds 5 parts by weight, the cost increases.

In the above-mentioned corona treatment step (S20), the base film layer improves adhesion performance with an adhesive formed later. When the corona treatment is not performed, the adhesive force between the base film layer and the adhesive layer is lowered, and the components of the adhesive constituting the adhesive layer may be transferred depending on the surface tension of the adherend.

The step (S30) of applying the above-described light-diffusing composition is based on 100 parts by weight of the total composition, 40 to 48 parts by weight of calcium carbonate, 30 to 35 parts by weight of light-diffusing beads, 11 parts by weight of silicic acid, and 1 to 3 parts by weight of stabilizer Use a light diffusing composition containing.

In the step (S40) of preparing the above-mentioned aqueous acrylic emulsion adhesive, at least one of butyl acrylate, decyl acrylate, isopropyl acrylate, and 2-ethylhexyl acrylate is used as the adhesion-enhancing monomer.

In the step (S40) of preparing the above-mentioned aqueous acrylic emulsion adhesive, at least one of methyl methacrylate and pentyl methacrylate is used as a cohesive strength-enhancing monomer.

In the step (S40) of preparing the above-described aqueous acrylic emulsion adhesive, hydroxyethyl methacrylate is used as a crosslinking monomer.

The acrylic emulsion resin used in the step (S40) of preparing the above-mentioned aqueous acrylic emulsion adhesive is excellent in weather resistance and oil resistance, and at the same time, as a constituent monomer, has good copolymerization with other vinyl monomers, polarity of the adherend and internal stress of the adhesive layer As a functional monomer in consideration of strengthening, it has a characteristic that includes both a hydroxyl group and a carboxyl group.

The acrylate-based resin may have an initial weight average molecular weight in the range of 200,000 to 800,000, preferably 300,000 to 600,000.

In the step (S40) of preparing the above-mentioned aqueous acrylic emulsion adhesive, at least one of isoprone diisocyanate, hexamethylene diisocyanate, and tolylene diisocyanate is used as the isocyanate curing agent.

Isocyanate-based curing agents have excellent reactivity and crosslinking properties even at room temperature, so they can be made three-dimensional by urea bonds with -NCO groups in -OH groups or -COOH groups in adhesives, resulting in cohesion, heat resistance, solvent resistance, and durability. It is possible to improve mechanical properties and environmental resistance.

The isocyanate-based curing agent may be used in an amount of 0.5 to 3 parts by weight, preferably 1 to 2 parts by weight, based on 100 parts by weight of the acrylate-based resin in the pressure-sensitive adhesive. When the amount of the isocyanate-based curing agent used is less than 0.5 weight, the adherend may be contaminated due to a decrease in cohesive strength and heat resistance due to a decrease in crosslinking density, and also a tendency for a large change in adhesive strength over time, and an amount of the isocyanate-based curing agent used When it exceeds 3 parts by weight, the monomer remaining after participating in crosslinking may become a contaminant for the adherend, and there is a problem in that adhesion deterioration and aging phenomenon are promoted.

When the amount of water used is less than 5 parts by weight in the step of preparing the aqueous acrylic emulsion adhesive (S40), the viscosity tends to increase rapidly and the adhesive coating property tends to decrease over time after mixing the curing agent, and the amount of water used is more than 30 parts by weight There is a problem that the adhesion coating property is lowered and whitening occurs.

The step of applying the above-mentioned aqueous acrylic emulsion pressure-sensitive adhesive (S50) includes: a step of raising the pressure-sensitive adhesive while the mesh roller composed of cells in a diagonal line rotates (S51); Step of interlocking the adhesive inserted into the cell of the mesh roller to the surface of the rotating rubber roller (S52); And applying a pressure-sensitive adhesive to the surface of the corona-treated base film layer by applying a pressure-sensitive adhesive rubber roller (S53).

After completing the step (S80) of applying an aqueous acrylic emulsion pressure-sensitive adhesive at 10 to 18 g/m 2 and applying hot air to dry (S80), the strength and adhesion of the pressure-sensitive adhesive are most preferred as the drying weight becomes 6 to 14 g/m 2. When the adhesive coating amount of the adhesive layer is less than 10 g/m 2, adhesive cohesive force and adhesion to the adhered plate decrease, and when it exceeds 18 g/m 2, there is a problem in that adhesive coating property and dryness decrease.

The conventional coating method mainly applied the general mesh roller type of the gravure bar coating method, but this method is mainly used for the conventional solvent type oil-based adhesive, and is grafted with the water-based acrylic emulsion-based adhesive. As a result, the production process density is unstable and the productivity decreases significantly.

In order to prevent the above problems, the present invention applies a mesh roller (not shown) composed of cells in a diagonal line rather than a regular mesh roller processed into a uniform cell, and is applied in a diagonal type rather than cumulatively applying the adhesive in one direction. It allows a more uniform application.

When coating in the manner of applying the aqueous acrylic emulsion pressure-sensitive adhesive (S50), formation of a more uniform pressure-sensitive adhesive and drying are also facilitated, and the production line speed is 25 to 35m/min when the conventional coating method is performed. Productivity can be significantly increased because the progress can be performed at a line speed of 60 to 80 m/min.

The step of uniformizing both surfaces of the base film layer (S60) includes: first uniformizing the surface of the base film layer using a rotating bar having a rotational speed of 1500 to 1800 m/min (S61); And a second uniforming step (S62) of the surface of the primary uniformed base film layer using a rotating bar having a rotational speed of 600 to 900 m/min.

In the step of drying by applying the hot air (S80), when a conveyor belt type drying furnace is used, a solvent often remains in the protective film, and due to the activity of the residual solvent, the crosslink density decreases and the adhesion layer breaks down. In addition, it causes problems such as contamination (transfer, etc.) of the adherend due to an increase in late adhesion. In order to solve this, the present invention uses a beltless steel material to improve the drying ability by allowing the internal radiant heat to be transferred to the base film coated with the adhesive by drying, so that the solvent of the adhesive is completely evaporated and caused by residual solvent. Can solve the problem.

In addition, in order to prevent contamination of foreign substances that may be generated in the process of transferring hot air, hot air from which foreign matter has been removed is supplied by inserting a three-stage filter (1st: pre-filter → 2nd: medium filter → 3rd: HEPA filter). Can be installed.

The drying speed is maintained in the range of up to 100 m/min, preferably 60 to 80 m/min, in terms of removal of residual solvent and adhesion coating stability. At this time, if the first section of the drying temperature cycle divided into 90℃→105℃→115℃→110℃→90℃ section exceeds 90℃, the dry state of the adhesive coating film is not uniform and intensive drying occurs only at the adhesive interface. Therefore, it maintains an unstable dry state.

In addition, the base film layer discharged in the drying step (S80) in order to prevent wrinkles (washing phenomenon) and shrinkage of the base film layer according to the drying temperature may be maintained by using a separate expander roller.

In the step (S90) of removing the static electricity of the film layer, static electricity generated in the process of transferring the base film layer coated with the adhesive may be removed by grounding a separate ionizer facility and an static electricity removal cable.

Winding using the above-described rolling roller (S100), while the force is concentrated toward both ends, tensile force is applied in the longitudinal direction to prevent the phenomenon of air bubbles being mixed around the shiwa phenomenon and the central part, and the surface roughness Use a stable and durable rolling roller.

The rolling roller has a crown treatment of 1.5 to 2 degrees and uses a silicone having a hardness of 40 to 60 A, and through the distribution of force, the film seeks to stabilize the tensile force generated in the longitudinal and transverse directions and bubbles. It is possible to prevent mixing and film deformation.

The above-mentioned aging and curing step (S110), in order to increase the molecular weight or crosslink density of the protective film adhesive layer, the temperature is in the range of 12 to 72 hours in a state where warmth can be circulated at 50 to 70°C, preferably In the following, it aged for 24 to 48 hours.

Initially, the average molecular weight of the acrylic emulsion-based resin was measured in the range of 200,000 to 800,000. As the cross-linking progressed, the average molecular weight of the acrylic emulsion-based resin increased geometrically, resulting in stable cross-linking density, maximizing cohesiveness and heat resistance to form stable adhesion. Became.

2 is a cross-sectional view of a light diffusing bead according to this invention.

As shown in FIG. 2, the light-diffusing bead 300 according to the present invention, the micropore 301a is connected at regular intervals, and an outer wall 301 having a spherical separation space 301b formed therein , It comprises a repellent composition 302 filled in the spherical spaced space 301b inside the outer wall.

The above-described light diffusion beads 300 have a particle size of preferably 120 to 180 mesh, and when the particle size is larger than 120 mesh, when the light diffusion composition is applied to the base film (S30), the light diffusion beads are separated. , If the particle size is smaller than 180 mesh, there is a problem that the insect repellent effect is not exhibited due to the small amount of the repellent composition.

As the above-described insect repellent composition 302, camphor essential oil, coarse charcoal powder, lacquer extract, etc. may be used, and ingredients such as camphor, saprole, and cineol contained in camphor essential oil have excellent antibacterial activity, strong volatility, and a refreshing and strong fragrance. It exhibits characteristics, and has a porous structure, so it has an excellent adsorption and deodorization effect, absorbs impurities and odors, and exhibits excellent antibacterial activity and insect repellent effect of urushiol contained in lacquer extract.

Epoxysided soybean oil may be used as the above-described stabilizer, and the elasticity and processability of the composition may be improved.

(Experimental example)

The adhesive strength at room temperature and the change in adhesive strength after heating were measured and compared. The results are shown in Tables 1 to 2 below.

Condition
Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 adhesive Adhesion enhancing monomer Butyl acrylate 2-ethylhexyl acrylate Butyl acrylate Butyl acrylate Ethyl acrylate Parts by weight 60 60 50 100 60 Cohesive Strengthening Monomer Methyl methacrylate Methyl methacrylate Methyl methacrylate Methyl methacrylate Methyl methacrylate Parts by weight 5 15 3 18 5 Crosslinking
Monomer Hydroxyethyl methacrylate Hydroxyethyl methacrylate Hydroxyethyl methacrylate Hydroxyethyl methacrylate Hydroxyethyl methacrylate Parts by weight 25 25 25 25 25

Temperature Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 25℃ 2.4gf/mm 8.0gf/mm 2.0gf/mm 8.0gf/mm 1.8gf/mm 50℃ 4.0gf/mm 14.0gf/mm 3.1gf/mm 3.8gf/mm 2.5gf/mm

As in the above results, in the case of Example 1 and Example 2, stable characteristics were exhibited even with changes over time, and the adhesive liquid transition phenomenon did not occur due to excellent peel strength. On the other hand, in Comparative Example 1, in which the added amount of the adhesive-reinforced monomer was less than in Example, the adhesive strength before and after warming was measured weaker than in Example. In the case of Comparative Example 2 in which the amount of the adhesion-reinforced monomer was more added in the implementation, the adhesive strength was the same as in Example 2 before heating, but the adhesive melted after heating and the cohesive strength was rapidly weakened and easily separated to measure the adhesive strength to be low. In Comparative Example 3, in which the carbon number of the adhesive-reinforced monomer was less than that of Example, the adhesive strength before and after heating was weaker than that of Example. Therefore, the adhesive force of the protective film for the LED light diffusion plate of the present invention can be applied to improve the adhesive force.

300: light diffusion beads 301: outer wall
301a: micropore 301b: inner space
302: insect repellent composition

Claims (8)

Manufacturing a base film layer having a thickness of 30 to 80 μm by laminating a single layer of low density polyethylene (LDPE) on the outer surface and the inner surface with a single layer of linear low density polyethylene (LLDPE);
Corona-treating one surface of the base film layer under conditions ranging from 40 to 46 dyne/cm;
Coating a light diffusion composition on one surface of the base film layer that is not corona treated;
Prepare an aqueous acrylic emulsion adhesive by mixing 60 to 90 parts by weight of the adhesive-reinforced monomer, 2 to 15 parts by weight of the cohesive-strengthened monomer, 2 to 25 parts by weight of the crosslinking monomer, 0.5 to 3 parts by weight of an isocyanate curing agent, and 5 to 30 parts by weight of water To do;
Applying 10 to 18 g of an aqueous acrylic emulsion pressure-sensitive adhesive per 1 m 2 to one surface of the corona-treated base film layer using a mesh roller composed of diagonal cells;
Homogenizing both surfaces of the base film layer coated with the light-diffusing composition and the aqueous acrylic emulsion adhesive using a rotating bar;
Applying a wax to one surface of the base film layer in which the light diffusion composition is homogenized;
Drying the base film layer coated with the water-based acrylic emulsion pressure sensitive adhesive at a pressure of 0.8 kgf/cm 2 with a drying temperature cycle divided into 90° C. to 105° C. to 115° C. to 110° C. to 90° C. sections;
Removing the static electricity of the film layer on which the adhesive is formed;
Winding the static-removed film layer using a rolling roller equipped with silicone having a hardness of 40 to 60 A and having a crown treatment of 1.5 to 2 degrees; And
Comprising the step of aging and curing the wound film layer in the range of 50 ~ 70 ℃ 12 ~ 72 hours,
The step of applying the light diffusion composition is based on 100 parts by weight of the total composition, 40 to 48 parts by weight of calcium carbonate, 30 to 35 parts by weight of light diffusion beads, 11 parts by weight of silicic acid, and 1 to 3 parts by weight of stabilizer A method of manufacturing a protective film for an LED light diffusion plate, characterized by using a diffusion composition. delete According to claim 1,
The above light diffusion beads,
The LED is characterized in that the micropore is connected at regular intervals and includes an outer wall in which a spherical separation space is formed, and an insect repellent composition filled in the spherical separation space inside the outer wall, and has a particle size of 120 to 180 mesh. Method for manufacturing a protective film for a light diffusion plate. delete According to claim 1,
The step of preparing the above-described aqueous acrylic emulsion adhesive,
At least one or more of butyl acrylate, decyl acrylate, isopropyl acrylate, and 2-ethylhexyl acrylate is used as the adhesion enhancing monomer, and at least one of methyl methacrylate and pentyl methacrylate is used as the cohesive strength enhancing monomer. And, using a hydroxyethyl methacrylate as a crosslinking monomer, and an isoprene diisocyanate, hexamethylene diisocyanate, at least one of tolylene diisocyanate as an isocyanate-based curing agent, characterized in that at least one of the protective film for the LED light diffusion plate Manufacturing method. According to claim 1,
The step of applying the aqueous acrylic emulsion pressure-sensitive adhesive,
Step of raising the pressure-sensitive adhesive while rotating the mesh roller is composed of cells diagonally;
Interlocking the adhesive inserted into the cell of the mesh roller and transferring it to the surface of the rotating rubber roller; And
A method of manufacturing a protective film for an LED lighting diffuser plate comprising the step of applying a pressure-sensitive adhesive rubber roller to a surface of the corona-treated base film layer to apply the pressure-sensitive adhesive. According to claim 1,
Uniforming both surfaces of the base film layer described above,
First uniformizing the surface of the base film layer by using a rotating bar having a rotational speed of 1500 to 1800 m/min; And
A method of manufacturing a protective film for an LED lighting diffuser plate comprising the step of uniformly uniforming the surface of the primary uniformed base film layer using a rotating bar having a rotational speed of 600 to 900 m/min. A protective film for an LED lighting diffuser plate, characterized in that it is manufactured by the manufacturing method of any one of claims 1 or 3 or 5 to 7.

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