Low-stripping electrostatic pressure PU protective film and preparation process thereof

Abstract

The invention discloses a low-stripping electrostatic pressure PU protective film which at least comprises an antistatic release layer, a polyurethane adhesive layer, a PET base material layer and anantistatic coating which are sequentially arranged from top to bottom, wherein the antistatic release layer is a single-sided release surface anti-impact electric film, the release force of the release surface of the antistatic release layer is 50-100g / mm, and the impedance value of the antistatic release layer is 10 caret 8 to 10 caret 10 ohm; and the impedance value of the antistatic coating is10 caret 6 to 10 caret 9 ohm. According to the protective film disclosed by the invention, an obvious improvement effect is obviously achieved under the film tearing electrostatic voltage, and the iris phenomenon generated when the PU protective film is used can be effectively reduced.

Description

technical field

[0001] The invention relates to a PU protective film and a preparation process thereof, in particular to a low peeling static voltage PU protective film and a preparation process thereof. Background technique

[0002] According to the purpose, the protective film can be divided into digital product protective film, car protective film, household protective film, food preservation protective film, etc. With the popularization of digital products such as mobile phones in China, protective film has gradually become a kind of screen protective film Collectively, and its functions in the field of screen protective films are also varied. PU protective film is a functional protective film produced with transparent PET film as the base material. It is mainly used for ITO film, cover glass, TP process, modules and It is used for protection such as complete machine shipment, but the existing PU protective film has poor light transmission performance, poor foam removal ...

Examples

Embodiment 1

[0026] The PU protective film of this embodiment is an antistatic release layer, a polyurethane adhesive layer, a PET substrate layer, and an antistatic coating from top to bottom. 1. The antistatic release layer is usually a single-sided release surface anti-shock film, the release force is 50-100g / mm, and the impedance value is 10^8-10^10Ω. 2. As a polyurethane adhesive layer, it is required to have a strong Excellent aging resistance (high temperature aging, UV aging, etc.); good bonding performance to component materials; dry glue thickness of 8-10μm, pure polyurethane polymer. Use this formula to coat dry glue with a thickness of 8-10 μm, and test it on a PET substrate of 50 μm: 180° peel force 1-3g, 3. The PET substrate layer is 50 μm, the transmittance is greater than 90%, and the haze is less than 2 % PET substrate; 4. The antistatic coating is usually a polythiophene coating, and its impedance value is about 10^6-10^9Ω.

[0027] Production process:

[0028] Select m...

Embodiment 2

[0046] The PU protective film of this embodiment is an antistatic release layer, a polyurethane adhesive layer, a PET substrate layer, and an antistatic coating from top to bottom. 1. The antistatic release layer is usually a single-sided release surface anti-shock film, the release force is 50-100g / mm, and the impedance value is 10^8-10^10Ω. 2. As a polyurethane adhesive layer, it is required to have a strong Excellent aging resistance (high temperature aging, UV aging, etc.); good bonding performance to component materials; dry glue thickness of 8-10μm, pure polyurethane polymer. Use this formula to coat dry glue with a thickness of 8-10 μm, and test it on a PET substrate of 50 μm: 180° peel force 1-3g, 3. The PET substrate layer is 50 μm, the transmittance is greater than 90%, and the haze is less than 2 % PET substrate; 4. The antistatic coating is usually a polythiophene coating, and its impedance value is about 10^6-10^9Ω.

[0047] Production process:

[0048] Select m...

Embodiment 3

[0065] The PU protective film of this embodiment is an antistatic release layer, a polyurethane adhesive layer, a PET substrate layer, and an antistatic coating from top to bottom. 1. The antistatic release layer is usually a single-sided release surface anti-shock film, the release force is 50-100g / mm, and the impedance value is 10^8-10^10Ω. 2. As a polyurethane adhesive layer, it is required to have a strong Excellent aging resistance (high temperature aging, UV aging, etc.); good bonding performance to component materials; dry glue thickness of 8-10μm, pure polyurethane polymer. Use this formula to coat dry glue with a thickness of 8-10 μm, and test it on a PET substrate of 50 μm: 180° peel force 1-3g, 3. The PET substrate layer is 50 μm, the transmittance is greater than 90%, and the haze is less than 2 % PET substrate; 4. The antistatic coating is usually a polythiophene coating, and its impedance value is about 10^6-10^9Ω.

[0066] Production process:

[0067] Select m...

technical field

[0001] The invention relates to a PU protective film and a preparation process thereof, in particular to a low peeling static voltage PU protective film and a preparation process thereof. Background technique

[0002] According to the purpose, the protective film can be divided into digital product protective film, car protective film, household protective film, food preservation protective film, etc. With the popularization of digital products such as mobile phones in China, protective film has gradually become a kind of screen protective film Collectively, and its functions in the field of screen protective films are also varied. PU protective film is a functional protective film produced with transparent PET film as the base material. It is mainly used for ITO film, cover glass, TP process, modules and It is used for protection such as complete machine shipment, but the existing PU protective film has poor light transmission performance, poor foam removal ...

Examples

Embodiment 1

[0026] The PU protective film of this embodiment is an antistatic release layer, a polyurethane adhesive layer, a PET substrate layer, and an antistatic coating from top to bottom. 1. The antistatic release layer is usually a single-sided release surface anti-shock film, the release force is 50-100g / mm, and the impedance value is 10^8-10^10Ω. 2. As a polyurethane adhesive layer, it is required to have a strong Excellent aging resistance (high temperature aging, UV aging, etc.); good bonding performance to component materials; dry glue thickness of 8-10μm, pure polyurethane polymer. Use this formula to coat dry glue with a thickness of 8-10 μm, and test it on a PET substrate of 50 μm: 180° peel force 1-3g, 3. The PET substrate layer is 50 μm, the transmittance is greater than 90%, and the haze is less than 2 % PET substrate; 4. The antistatic coating is usually a polythiophene coating, and its impedance value is about 10^6-10^9Ω.

[0027] Production process:

[0028] Select m...

Embodiment 2

[0046] The PU protective film of this embodiment is an antistatic release layer, a polyurethane adhesive layer, a PET substrate layer, and an antistatic coating from top to bottom. 1. The antistatic release layer is usually a single-sided release surface anti-shock film, the release force is 50-100g / mm, and the impedance value is 10^8-10^10Ω. 2. As a polyurethane adhesive layer, it is required to have a strong Excellent aging resistance (high temperature aging, UV aging, etc.); good bonding performance to component materials; dry glue thickness of 8-10μm, pure polyurethane polymer. Use this formula to coat dry glue with a thickness of 8-10 μm, and test it on a PET substrate of 50 μm: 180° peel force 1-3g, 3. The PET substrate layer is 50 μm, the transmittance is greater than 90%, and the haze is less than 2 % PET substrate; 4. The antistatic coating is usually a polythiophene coating, and its impedance value is about 10^6-10^9Ω.

[0047] Production process:

[0048] Select m...

Embodiment 3

[0065] The PU protective film of this embodiment is an antistatic release layer, a polyurethane adhesive layer, a PET substrate layer, and an antistatic coating from top to bottom. 1. The antistatic release layer is usually a single-sided release surface anti-shock film, the release force is 50-100g / mm, and the impedance value is 10^8-10^10Ω. 2. As a polyurethane adhesive layer, it is required to have a strong Excellent aging resistance (high temperature aging, UV aging, etc.); good bonding performance to component materials; dry glue thickness of 8-10μm, pure polyurethane polymer. Use this formula to coat dry glue with a thickness of 8-10 μm, and test it on a PET substrate of 50 μm: 180° peel force 1-3g, 3. The PET substrate layer is 50 μm, the transmittance is greater than 90%, and the haze is less than 2 % PET substrate; 4. The antistatic coating is usually a polythiophene coating, and its impedance value is about 10^6-10^9Ω.

[0066] Production process:

[0067] Select m...

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