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Low-climbing high-dyne-value polyurethane protective film and preparation method thereof

A technology of polyurethane and protective film, which is applied in the direction of polyurea/polyurethane adhesive, film/sheet release liner, film/sheet adhesive, etc. It can solve problems that have not yet been seen, and achieve good surface tension, Oxidation and scratch prevention, good stability effect

Active Publication Date: 2021-10-01
SICHUAN DONGFANG INSULATING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the protective films on the surface of copper foil mainly include silica gel and acrylic protective films. In the prior art, CN106752754A discloses "a kind of adhesive-backed polyurethane protective film and its preparation method", which is mainly used in the automobile industry to enhance the friction resistance of the automobile surface Performance and weather resistance; CN109111868A discloses "a kind of ultra-low tearing voltage polyurethane protective film and its preparation method", which is used as an antistatic protective film for touch screen processing; there is no protective film for copper foil tape in the prior art, At the same time, this protective film not only has temperature resistance, and the adhesive force climbs no more than 300% of the initial adhesive force after temperature resistance, but also has a polyurethane protective film with a high factor value on the surface of copper foil.

Method used

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  • Low-climbing high-dyne-value polyurethane protective film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1: see accompanying drawing.

[0049] A method for preparing a low-climb high factor polyurethane protective film, the steps are:

[0050] a. Prepare polyurethane adhesive (or polyurethane adhesive resin composition):

[0051] At room temperature, put 50 parts by mass of polyurethane prepolymer, 5 parts by mass of isocyanate curing agent [methyl diisocyanate (TDI for short)], 3 parts by mass of heat-resistant hardener (Shanghai Nagase Trading Co., Ltd. Lion King) whose brand name is CROSSLINKING AGENT N temperature-resistant hardener), 1 mass part of retarder (BPU retarder of Nanjing Box New Material Co., Ltd.), 70 mass parts of organic solvent (ethyl acetate), mix well (form System uniform solution), that is, the polyurethane adhesive is prepared; the viscosity of the polyurethane adhesive is (25°C) 230cps;

[0052] b. Preparation of low-climb high-value polyurethane protective film:

[0053] Take the PET film, coat (or call it coating) a layer of primer ...

Embodiment 2

[0057] Embodiment 2: see accompanying drawing.

[0058] A method for preparing a low-climb high factor polyurethane protective film, the steps are:

[0059] a. Prepare polyurethane adhesive (or polyurethane adhesive resin composition):

[0060] At room temperature, put 55 parts by mass of polyurethane prepolymer, 7 parts by mass of isocyanate curing agent [isophorone diisocyanate (IPDI for short)], 2 parts by mass of heat-resistant hardener (Shanghai Nagase Trading Co., Ltd. ( That is, the temperature-resistant hardener whose brand name is CROSSLINKING AGENT N), 1 part by mass retarder (BT-180 retarder from Nanjing Box New Material Co., Ltd.), 80 parts by mass organic solvent (ethyl acetate), Mix evenly (to form a uniform solution of the system), and the polyurethane adhesive is obtained; the viscosity of the obtained polyurethane adhesive is (25°C) 245cps;

[0061] b. Preparation of low-climb high-value polyurethane protective film:

[0062] Take a PET film, apply a layer ...

Embodiment 3

[0066] Embodiment 3: see accompanying drawing.

[0067] A method for preparing a low-climb high factor polyurethane protective film, the steps are:

[0068] a. Prepare polyurethane adhesive (or polyurethane adhesive resin composition):

[0069]At room temperature, put 70 parts by mass of polyurethane prepolymer, 8 parts by mass of isocyanate curing agent [diphenylmethane diisocyanate (MDI for short)], 6 parts by mass of heat-resistant hardener (Zhongshan Heli Chemical Co., Ltd. 3053 temperature-resistant hardener), 3 parts by mass of retarder (Zhengzhou Yuhe Chemical Products Co., Ltd. or Shanghai Yuanji Chemical Co., Ltd. acetylacetone), 80 parts by mass of organic solvent (ethyl acetate), mix well (formation system uniform solution), that is, the polyurethane adhesive is prepared; the viscosity of the polyurethane adhesive is (25°C) 391cps;

[0070] b. Preparation of low-climb high-value polyurethane protective film:

[0071] Take a PET film, apply a layer of primer solut...

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Abstract

The invention discloses a low-climbing high-dyne-value polyurethane protective film and a preparation method thereof. The low-climbing high-dyne-value polyurethane protective film is characterized in that the low-climbing high-dyne-value polyurethane protective film is formed by sequentially compounding a PET thin film layer, a bottom coating layer, a polyurethane adhesive layer, a release layer and a PET thin film layer. The preparation method comprises the following steps: mixing polyurethane prepolymer, an isocyanate curing agent, a temperature-resistant hardening agent, a retarder and an organic solvent to prepare the polyurethane adhesive; coating the single surface of the PET film layer with bottom coating liquid, and drying to form the bottom coating layer; and coating the polyurethane adhesive on the bottom coating layer, drying through a drying tunnel with the temperature of 65-130 DEG C and the total length of 24-45m at the linear speed of 10-35m / min, compounding with a single-sided release PET film, and curing to obtain the low-climbing high-dyne-value polyurethane protective film. The low-climbing high-dyne polyurethane protective film disclosed by the invention is suitable for protecting the copper foil surface of the copper foil adhesive tape in the transportation, storage and manufacturing processes of the copper foil adhesive tape, and is good in performance and high in practicability.

Description

technical field [0001] The invention belongs to a layered product and its preparation, and relates to a low-climb high factor polyurethane protective film and a preparation method thereof. The (prepared) low-climbing high-value polyurethane protective film of the present invention is mainly used on copper foil tapes to protect the copper foil surface of the copper foil tape and prevent the surface of the copper foil from being oxidized, scratched, deliquescent, etc., without affecting Copper foil tape is used in the subsequent process of mobile phones, notebook computers and other digital products. Background technique [0002] With the rapid development of electronic products, copper foil tape is widely used in the transportation, storage and manufacturing process of touch display panels of mobile phones, computers and other digital products. On the one hand, copper foil tape is easily oxidized during transportation and storage. and scratches, etc., it is necessary to prot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/25C09J7/30C09J175/04C09J7/40
CPCC09J7/255C09J7/30C09J175/04C09J7/403C09J2467/006C09J2467/005C09J2301/122Y02E10/72
Inventor 张峰师强李杰霞余莉
Owner SICHUAN DONGFANG INSULATING MATERIAL
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