Production process and application of directional aluminum-plated reflective product

Abstract

The application discloses a production process of a directional aluminum-plated light-reflecting product, which comprises the steps of planting beads, plating and compounding. The evaporator is arranged on one side of a transmission device, the distance between the evaporator and the center of the transmission device is 30-60 cm, and the angle between the transmission device and the evaporation direction is 25-50 degrees. The directional aluminum plating of the glass beads on the bead-planting film can be realized, the bead-planting film presents a gray side and a colorful side, and the apparent performance of the light-reflecting product is improved. The prepared light-reflecting product is very characteristic, and has a good light-reflecting effect in a specific direction. The colored adhesive layer can be observed under a specific angle, and the reflective layer can be gradually observed with the change of the angle, so that a splendid effect is presented. After the PET is subjected to corona treatment and then the adhesive is coated, the glass beads still have good water resistance, washing color fastness, light color fastness and low-temperature folding resistance after the single-side directional aluminum plating.

Description

Technical Field

[0001] This invention relates to a manufacturing process for directional aluminum-plated reflective products, specifically to optical elements other than lenses, under the G02B5 standard. Background Technology

[0002] Aluminum-plated reflective products are characterized by their eye-catching colors and reflective properties, proving highly effective in low-light conditions, especially at night. In recent years, people's pursuit of fashionable products has increased, and aluminum-plated reflective products not only reflect light in the dark but also display different colors in sunlight, offering a higher level of style. However, most aluminum plating processes currently on the market are full-surface aluminum plating, resulting in a gray surface that lacks vibrancy and style.

[0003] Chinese invention patent CN200910095843.3 discloses a beaded film for reflective fabric and a photocurable reflective beaded fabric composed of the beaded film. The reflective effect is achieved by vapor-depositing aluminum onto the surface of glass microspheres on the beaded film; however, the resulting reflective effect is gray and not aesthetically pleasing. Chinese invention patent CN202010968845.5 discloses a micro-elastic reflective fabric and its preparation method, which combines a beaded film with an elastic fabric. This improves the elasticity and abrasion resistance of reflective products, enhancing user comfort. However, the embedding depth of the elastic fabric and glass microspheres is relatively high, requiring more adhesive, resulting in higher production costs and a longer curing time. Summary of the Invention

[0004] To improve the color saturation of reflective products after beaded film and base fabric are laminated, the first aspect of this invention provides a manufacturing process for directional aluminum-plated reflective products, comprising the following steps:

[0005] (1) Beading: Coat the PET with adhesive, dry it, then distribute the glass microbeads evenly on the dried adhesive surface, and roll it up to obtain a beaded film.

[0006] (2) Coating: Aluminum is oriented onto the glass microspheres on the beaded film;

[0007] (3) Lamination: Coat the surface of the release PET film with colored composite adhesive, dry it, then laminate the colored composite adhesive with the base fabric, peel off the release PET film, laminate the base fabric with the oriented aluminum-plated beaded film, and peel off the PET to obtain the final product.

[0008] As a preferred embodiment, the specific parameters for the directional aluminum plating are as follows: vacuum degree ≤ 0.1 Pa, aluminum wire evaporation temperature ≥ 800℃.

[0009] As a preferred embodiment, the specific parameters of the directional aluminum plating equipment are as follows: the evaporator is located on one side of the transmission device, the distance between the evaporator and the center of the transmission device is 30-60cm, and the angle between the transmission device and the evaporation direction is 25°-50°.

[0010] During the experiment, the applicant discovered that by extending the distance between the evaporation boat and the plate drive, and by making the plate drive form a 25-50° angle with the aluminum vapor, an aluminum layer can be formed on one side of the microspheres, achieving directional aluminum plating. The resulting product exhibits a partially colored and partially gray effect, achieving color gradient. The applicant also found that in traditional processes, the aluminum coating is distributed on the outer surface of the glass microspheres, resulting in an overall gray visual effect. This application, by adjusting the parameters of the evaporation equipment, achieves excellent color effects while maintaining good adhesion to the substrate. Through directional aluminum plating, one side of the glass microspheres appears gray, and the other side appears colored, greatly improving the visual effect. Applying this to the production of gradient-colored fabrics can improve the gradient effect, making color changes more natural and smooth.

[0011] In a preferred embodiment, the directional aluminum vapor deposition material is selected from one or a combination of aluminum, copper, silver, and zinc sulfide.

[0012] In a preferred embodiment, the glass microspheres have a particle size of 20-120 μm, and a semi-enclosed coating is formed on the glass microspheres during directional aluminum plating, with the encapsulation area covering 1 / 3 to 1 / 2 of the surface area of ​​the glass microspheres. The glass microspheres are purchased from Mianyang Yangyao New Materials Co., Ltd. or Jiangyou Mingrui Reflective Materials Co., Ltd., but the purchasing company is not limited.

[0013] In a preferred embodiment, during the bead-planting step, the PET thickness is 20-100 μm, and the PET surface coated with adhesive needs to be corona-treated with a corona dyne value of 40-60 mN / m.

[0014] In a preferred embodiment, the adhesive coating thickness in the bead-planting step is 2-20 μm.

[0015] In a preferred embodiment, the adhesive coating thickness in the bead-planting step is 10-15 μm.

[0016] In a preferred embodiment, the adhesive coating thickness in the bead-planting step is 13 μm.

[0017] In a preferred embodiment, the composite step includes at least color paste, color powder, and adhesive in the color composite adhesive, wherein the mass fraction of the color paste is 1-40%.

[0018] In a preferred embodiment, the adhesive is selected from either polyurethane adhesives or polyacrylic adhesives. Preferably, the adhesive accounts for 60-99% by weight of the colored composite adhesive.

[0019] In a preferred embodiment, the thickness of the release PET film in the composite step is 3-40 μm.

[0020] In a preferred embodiment, in the composite step, the base fabric is selected from one or a combination of several of the following: polyester fabric, polyester-cotton (T / C) fabric, nylon fabric, and pure cotton fabric.

[0021] The second aspect of the present invention provides an application of a manufacturing process for directional aluminum-plated reflective products, which is applied to reflective color gradient products.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The production process of the directional aluminum-coated reflective product of the present invention, by setting the evaporator on one side of the transmission device, the distance between the evaporator and the center of the transmission device is 30-60cm, and the angle between the transmission device and the evaporation direction is 25°-50°, can realize the directional aluminum coating of glass microspheres on the beaded film, so that the beaded film presents a gray one side and a colored one side, which improves the appearance performance of the reflective product.

[0024] (2) The production process of the directional aluminum-coated reflective product of the present invention achieves 1 / 3-1 / 2 surface coating of glass microspheres by forming a semi-enclosed directional aluminum coating on the glass microspheres. This allows the glass microspheres to not only have good reflective effect in dark environments, but also good color effect in bright environments, resulting in better aesthetic performance.

[0025] (3) The production process of the directional aluminum-coated reflective product of the present invention involves corona treatment of PET followed by coating with adhesive, and the coating thickness is 2-20μm. This allows the glass microspheres to maintain good water resistance, color fastness to washing, color fastness to light exposure, and good low-temperature folding resistance after directional aluminum coating on one side.

[0026] (4) The reflective properties of the directional aluminum-coated reflective product of the present invention are highly distinctive, and it can have a good reflective effect in a specific direction. The colored adhesive layer can be observed at a specific angle, and the reflective layer can be gradually observed as the angle changes, thus presenting a gorgeous effect. Attached Figure Description

[0027] Figure 1 A photograph of the reflective product in a reflective state, prepared using the manufacturing process of the directional aluminum-plated reflective product of this application;

[0028] Figure 2 A photograph of a reflective product in a non-reflective state, prepared using the manufacturing process of the directional aluminum-plated reflective product of this application. Detailed Implementation

[0029] The present invention will now be described in detail through embodiments. It should be noted that the following embodiments are only for further illustration of the present invention and should not be construed as limiting the scope of protection of the present invention. Non-essential improvements and adjustments made by those skilled in the art based on the above description of the present invention still fall within the scope of protection of the present invention.

[0030] In addition, unless otherwise stated, all raw materials used are commercially available.

[0031] Example 1

[0032] A manufacturing process for a directional aluminum-coated reflective product includes the following steps:

[0033] (1) Beading: Coat the PET with adhesive, dry it, then distribute the glass microbeads evenly on the dried adhesive surface, and roll it up to obtain a beaded film.

[0034] (2) Coating: Aluminum is oriented onto the glass microspheres on the beaded film;

[0035] (3) Lamination: Coat the surface of the release PET film with colored composite adhesive, dry it, then laminate the colored composite adhesive with the base fabric, peel off the release PET film, laminate the base fabric with the oriented aluminum-plated beaded film, and peel off the PET to obtain the final product.

[0036] The specific parameters for the directional aluminum plating conditions are as follows: vacuum degree 0.1 Pa, aluminum wire evaporation temperature 800℃.

[0037] The specific parameters of the directional aluminum plating equipment are as follows: the evaporator is located on one side of the transmission device, the distance between the evaporator and the center of the transmission device is 50cm, and the angle between the transmission device and the evaporation direction is 40°.

[0038] The directional aluminum vapor deposition material is a combination of aluminum, copper, silver, and zinc sulfide, purchased from Pinghu Pacific Vacuum Technology Materials.

[0039] The glass microspheres have a particle size of 20-120 μm. During directional aluminum plating, a semi-enclosed coating is formed on the glass microspheres, covering an area of ​​5 / 12 of the surface area of ​​the glass microspheres. The glass microspheres were purchased from Mianyang Guangyao New Materials Co., Ltd.

[0040] In the bead-planting step, the PET thickness is 30μm, and the PET surface coated with adhesive needs to be corona-treated with a corona dyne value of 50mN / m.

[0041] In the bead-planting step, the adhesive coating thickness is 13 μm.

[0042] In the composite step, the colored composite adhesive includes color paste, color powder, and adhesive. The color paste has a mass fraction of 30%, and the adhesive is a polyurethane adhesive with a weight fraction of 65%. The colored composite adhesive is purchased from Hangzhou Xinghua Reflective Materials Co., Ltd.

[0043] In the composite process, the thickness of the release PET film is 36μm, and the base fabric is polyester-cotton fabric.

[0044] Example 2

[0045] A production process for a directional aluminum-coated reflective product, with the same steps as in Example 1, except that the PET is not corona-treated in the bead-planting step.

[0046] Example 3

[0047] A manufacturing process for a directional aluminum-coated reflective product, with the same steps as in Example 1, except that the adhesive coating thickness is 5 μm in the beading step.

[0048] Performance testing

[0049] 1. Water resistance: The water resistance of the reflective products prepared using the manufacturing process described in the example was tested according to ISO 5077-1984 standard.

[0050] 2. Colorfastness to washing: The colorfastness to washing of reflective products prepared using the manufacturing process described in the example was tested according to GB / T 12490-2014 standard. The degree of color change was assessed using a gray scale, with grade 1 being the worst and grade 5 the best.

[0051] 3. Colorfastness to light: The colorfastness to light of reflective products prepared using the manufacturing process described in the example was tested according to GB / T 8427-2019 standard. The degree of color change was assessed using a gray scale, with grade 1 being the worst and grade 5 being the best.

[0052] 4. Folding resistance: The folding resistance of the reflective products prepared using the production process of the example was tested in accordance with the FZ / T 01143-2018 standard in an environment of -15℃.

[0053] Examples 1-3 were tested according to the above standards, and the test results are shown in Table 1.

[0054] Table 1

[0055]

Claims

1. A manufacturing process for directional aluminum-plated reflective products, characterized in that, Includes the following steps: (1) Beading: Coating adhesive onto PET, drying, then evenly distributing glass microbeads onto the dried adhesive surface, and winding to obtain beaded film; (2) Coating: Aluminum is oriented onto the glass microspheres on the beaded film; (3) Lamination: Coat the surface of the release PET film with colored composite adhesive, dry it, then laminate the colored composite adhesive with the base fabric, peel off the release PET film, laminate the base fabric with the oriented aluminum-plated beaded film, and peel off the PET to obtain the final product; The specific conditions and parameters for the directional aluminum plating are as follows: vacuum degree ≤ 0.1 Pa, aluminum wire evaporation temperature ≥ 800℃; The directional aluminum plating is carried out in a directional aluminum plating equipment. The specific parameters of the directional aluminum plating equipment are as follows: the evaporator is located on one side of the transmission device, the distance between the evaporator and the center of the transmission device is 30-60cm, and the angle between the transmission device and the evaporation direction is 25°-50°. The glass microspheres have a particle size of 20-120μm. During directional aluminum plating, a semi-enclosed coating is formed on the glass microspheres, covering an area of ​​1 / 3 to 1 / 2 of the surface area of ​​the glass microspheres.

2. The manufacturing process of the directional aluminum-plated reflective product according to claim 1, characterized in that, The directional aluminum plating requires the use of vapor deposition materials, which are selected from one or a combination of aluminum, copper, silver, and zinc sulfide.

3. The manufacturing process of the directional aluminum-plated reflective product according to claim 1, characterized in that, In the bead-planting step, the thickness of the PET is 20-100μm, and the surface of the PET coated with adhesive needs to be corona-treated with a corona dyne value of 40-60 mN / m.

4. The manufacturing process of the directional aluminum-plated reflective product according to claim 1, characterized in that, In the bead-planting step, the adhesive coating thickness is 2-20 μm.

5. The manufacturing process of the directional aluminum-plated reflective product according to claim 1, characterized in that, In the composite step, the colored composite adhesive includes at least color paste, color powder, and adhesive, wherein the mass fraction of the color paste is 1-40%.

6. The manufacturing process of the directional aluminum-plated reflective product according to claim 1, characterized in that, In the composite step, the base fabric is selected from one or a combination of several of the following: polyester fabric, polyester-cotton fabric, nylon fabric, and pure cotton fabric.

7. An application of a manufacturing process for directional aluminum-plated reflective products according to any one of claims 1-6, characterized in that, It is used in reflective color gradient products.

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