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A kind of tpu composite glue, protective film and preparation method thereof

A protective film and glue technology, applied in the field of optical film, can solve the problems of low hardness and modulus, which cannot meet the demand

Active Publication Date: 2022-04-26
NINGBO HUGHSTAR ADVANCED MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Coated TPU is widely used in protective films such as mobile phones and car displays because of its no polarization angle and simple preparation. However, the existing coated TPU has low hardness and modulus, and is especially used in car displays, etc. In the laminated optical film with higher hardness requirements, as the main component, it often cannot meet the demand

Method used

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  • A kind of tpu composite glue, protective film and preparation method thereof

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preparation example Construction

[0055] In the third aspect, the present application example provides a method for preparing the protective film 10 provided in the second aspect, which includes:

[0056] Apply the TPU composite glue to one surface of the second release film 13, dry and solidify to obtain the TPU adhesive layer 12; attach the first release film 11 to the side of the TPU adhesive layer 12 away from the second release film 13 On one side, aging treatment is performed to obtain the protective film 10 .

[0057] Since the release force of the first release film 11 is greater than that of the second release film 13, the second release film 13 is not easy to remove during actual use, so the TPU composite glue is applied to the second release film. One surface of the film 13 forms a TPU adhesive layer 12, and then attaches the first release film 11. This arrangement allows the first release film 11 to effectively protect the TPU adhesive layer 12, preventing the TPU adhesive layer 12 from being far a...

Embodiment 1

[0062] The protective film includes a first release film, a TPU adhesive layer and a second release film laminated in sequence. The release force of the first release film was 35 g / mm, and the release force of the second release film was 15 g / mm.

[0063] Wherein, protective film is made by following preparation method:

[0064] (1) Obtain TPU composite glue:

[0065] 100 parts by weight of aliphatic polyurethane acrylic resin (AA4835 of Eurasia Enterprise Co., Ltd.), 15 parts by weight of TPU particles (5715 of Lubrizol), and 90 parts by weight of ketone-aldehyde resin (KR of Anfeng Industrial Co., Ltd. -1021), 28 parts by weight of methyl ethyl ketone, 52 parts by weight of cyclohexanone, 0.4 parts by weight of polyester-modified hydroxyl-functional polydimethylsiloxane solution (Byk Chemicals, BYK-371), 15 parts by weight 2 parts of high-functionality HDI trimer (Covestro, aliphatic polyisocyanate series, N3700) were mixed to obtain TPU composite glue.

[0066] (2) Coat ...

Embodiment 2

[0069] Its difference with embodiment 1 only lies in:

[0070] The protective film includes a first release film, a TPU adhesive layer and a second release film laminated in sequence. The release force of the first release film was 46 g / mm, and the release force of the second release film was 16 g / mm.

[0071] Wherein, protective film is made by following preparation method:

[0072] (1) Obtain TPU composite glue:

[0073]60 parts by weight of aliphatic polyurethane acrylic resin (AA4835 of Eurasia Enterprise Co., Ltd.), 20 parts by weight of TPU particles (5715 of Lubrizol), and 70 parts by weight of ketone-formaldehyde resin (An Feng Industrial Co., Ltd. KR -1021), 32 parts by weight of methyl ethyl ketone, 47 parts by weight of cyclohexanone, 0.6 parts by weight of polyester-modified polydimethylsiloxane solution containing hydroxyl functional groups (BK, BYK-371), 10 Mix parts by weight of high-functionality HDI trimer (Covestro, aliphatic polyisocyanate series, N3700) ...

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Abstract

A TPU composite glue, a protective film and a preparation method thereof relate to the field of optical films. TPU composite glue, which is made from the following raw materials by weight: 60-100 parts by weight of aliphatic polyurethane acrylic resin, 15-20 parts by weight of TPU particles, 70-90 parts by weight of ketone-formaldehyde resin, 75-84 parts by weight organic solvent, 0.4-0.6 parts by weight of leveling agent, and 10-15 parts by weight of isocyanate curing agent, wherein the Shore hardness of TPU particles is not higher than 55D. In this application, the rational change of the raw materials of the TPU composite glue can effectively improve the hardness and modulus of the TPU adhesive layer formed after the TPU composite glue is cured, making it suitable for the application of protective film products such as mobile phones and car display screens.

Description

technical field [0001] The application relates to the field of optical films, in particular to a TPU composite glue, a protective film and a preparation method thereof. Background technique [0002] Thermoplastic polyurethane elastomer (TPU) is a high molecular polymer obtained by polymerization of diisocyanate, low molecular chain extender and macromolecular diol. It is a new type of organic polymer material. Thermoplastic polyurethane elastomer has the characteristics of other plastics Incomparable to rubber, it has excellent properties such as high strength, high toughness, wear resistance, oil resistance, cold resistance, aging resistance, environmental protection, non-toxicity, and degradability; It is used in many industrial and civil fields. [0003] Coated TPU is widely used in protective films such as mobile phones and car displays because of its no polarization angle and simple preparation. However, the existing coated TPU has low hardness and modulus, and is espe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/14C09J175/04C09J161/02C09J11/08C09J7/40C09J7/30
CPCC09J175/14C09J161/02C09J11/08C09J7/40C09J7/30C09J2301/408C08L75/04C08L61/02C08L75/14
Inventor 李妍汪阳董红星
Owner NINGBO HUGHSTAR ADVANCED MATERIAL TECH
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