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A curved surface protective film and its coating and laminating method and molding method

A technology of protective film and curved surface, which is applied in the direction of chemical instruments and methods, synthetic resin layered products, coatings, etc. It can solve the problems of poor product durability, inaccurate alignment, and high viscosity of acrylic adhesive, so as to improve the bonding stability High performance, safe and simple operation, good fluidity of silica gel

Active Publication Date: 2019-04-02
GUANGZHOU EHANG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) TPU+acrylic adhesive film: TPU material belongs to the soft film series, which is soft overall and not straight enough, resulting in inaccurate alignment during film application and high requirements for film application techniques; moreover, acrylic adhesive has high viscosity and poor fluidity, which requires With the help of the corresponding scratch card to assist the exhaust, it affects the overall film experience;
[0005] (2) Hot-bent PET film: PET is used as the base material, lacks other hardened layer design, the surface hardness of the product is low, the overall is less than 3H (tested according to JIS 5600-5-4: 1999), and the product durability is poor;
[0006] (3) Hot-bending tempered glass film: high cost, and the edges are easily broken. Due to the rigidity of the glass as a whole, the tolerance value in the hot-bending process cannot be compensated by the corresponding glue layer, and there will be no glue in the middle of the product, which will affect the control sensitivity

Method used

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  • A curved surface protective film and its coating and laminating method and molding method
  • A curved surface protective film and its coating and laminating method and molding method
  • A curved surface protective film and its coating and laminating method and molding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] A curved surface protective film, which is prepared according to the following method:

[0081] 1. Coating and lamination

[0082] The first coating step: take a PET substrate layer with a thickness of 125 μm, and apply polyurethane acrylic resin with a thickness of 18 μm on the top and bottom surfaces of the PET substrate by roller coating, and the coating roller is a ceramic helical tooth pattern Roller, the speed of the coating roller is 40m / min, and the feeding speed of the PET substrate is 30m / min; after the polyurethane acrylic resin is cured, the first hardened layer and the second hardened layer are formed; combined with oven drying and ultraviolet light irradiation successively Two ways of curing treatment, the temperature of the oven is 50-100 ℃, the drying time is 2-4min; the power of the ultraviolet lamp is 80-100W / cm, and the irradiation time is 3-5s;

[0083] The first laminating step: take the first PET release film of acrylic glue type with a thickness ...

Embodiment 2

[0096] The difference between Example 2 and Example 1 is: the thickness of the first PET release film is 40 μm; the thickness of the PET substrate is 188 μm; the thickness of the first hardened layer is 15 μm, and the thickness of the second hardened layer is 20 μm; The thickness of the fluorinated silicone release layer is 60 μm;

[0097] In the second lamination step, the operation of aging treatment is as follows: standing at 50° C. for 24 hours.

[0098] Others are the same as in Example 1.

Embodiment 3

[0100] The difference between embodiment 3 and embodiment 1 is: in the first coating step, the rotating speed of coating roller is 20m / min, and the feeding speed of PET substrate is 3m / min;

[0101] In the second coating step, the high-viscosity silica gel is cured at 120°C for 150s to form a silica gel layer;

[0102] In the mold heating step, the temperature of the first heating box is 140°C, the temperature of the second heating box is 170°C, and the temperature of the third heating box is 220°C; the storage time of the graphite mold in the first heating box is 15min. The storage time in the second incubator and the third incubator is 5min;

[0103] In the step of pressing down the mold, the pressing speed is 500cm / min, and the pressing time is 2min;

[0104] In the step of cooling the mould, the down-pressing cylinder keeps the pressed state and enters the freezer together with the mold, and the temperature of the freezer is 0° C. for 10 minutes.

[0105] Others are the ...

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Abstract

A curved surface protective film, comprising a first PET release film (40), a first hardening layer (20), a base material layer (10), a second hardening layer (30), a silica gel layer (50), and a fluorinated organosilicone release layer (60) that are stacked sequentially from top to bottom. The first PET release film (40) comprises a PET release film body and a first adhesive layer disposed below the PET release film body. The curved surface protective film has high hardness and high stability after fitting a curved surface mobile phone, is capable of fitting a curved surface screen well, is durable and resistant to scratch, thereby providing a more stable, effective and comprehensive protection for the curved surface mobile phone screen, and is easy to apply, thereby providing good user experience. Also disclosed is a coating and laminating method for a curved surface protective film. The coating and laminating method has a simple process, few steps, and safe operation. Also disclosed is a forming method for a curved surface protective film. The forming method has a simple process, safe and simple operation, and low costs.

Description

technical field [0001] The invention relates to the technical field of a protective film, in particular to a curved surface protective film and a coating and laminating method and a molding method thereof. Background technique [0002] 2.5D curved surface mobile phones and 3D curved surface mobile phones are becoming more and more popular. From the flagship phones released in 2015-2016, it can be seen that the market share of curved surface mobile phones is close to 90%. Moreover, it can be judged from the increasing data and some statistical information that the development trend of curved mobile phones is a major trend, and the market share will continue to increase. With the rapid development of mobile phones, the existing mobile phone protective film has become more and more difficult to meet the needs of consumers. In order to cater to the development of curved mobile phones, protective films for curved mobile phones have emerged one after another. The existing curved...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B7/06B32B7/12B32B27/08B32B27/30B32B27/36B32B27/40B65D65/40B29C65/48B29L7/00B29L9/00
CPCB29C65/48B29C66/45B29C66/723B29L2007/00B29L2009/00B32B7/06B32B7/12B32B27/08B32B27/308B32B27/36B32B27/365B32B27/40B32B2255/10B32B2255/20B32B2307/554B32B2457/20B65D65/40
Inventor 蓝志锋施明张建伟
Owner GUANGZHOU EHANG ELECTRONICS CO LTD
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