CN114472114A - Preparation method of TPU electronic packaging leather material - Google Patents

Preparation method of TPU electronic packaging leather material Download PDF

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Publication number
CN114472114A
CN114472114A CN202210084903.7A CN202210084903A CN114472114A CN 114472114 A CN114472114 A CN 114472114A CN 202210084903 A CN202210084903 A CN 202210084903A CN 114472114 A CN114472114 A CN 114472114A
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parts
layer
wear
resistant
tpu
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李炎
高金岗
张哲�
王建伟
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WARREN SYNTHETIC LEATHER (SUZHOU) CO Ltd
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WARREN SYNTHETIC LEATHER (SUZHOU) CO Ltd
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Priority to CN202210084903.7A priority Critical patent/CN114472114A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
    • B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/56—Three layers or more
    • B05D7/58—No clear coat specified
    • B05D7/584—No clear coat specified at least some layers being let to dry, at least partially, before applying the next layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2502/00—Acrylic polymers
    • B05D2502/005—Acrylic polymers modified
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2503/00—Polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2601/00—Inorganic fillers
    • B05D2601/20—Inorganic fillers used for non-pigmentation effect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2602/00—Organic fillers

Abstract

The application belongs to the technical field of packaging leather materials, and particularly relates to a preparation method of a TPU electronic packaging leather material, which comprises the following steps: (1) coating a PU layer mixture on the surface of release paper, and drying to obtain a PU layer; (2) coating a TPU layer molten material on the surface of the PU layer, and solidifying to obtain a TPU layer; (3) removing the release paper, coating the wear-resistant coating on the other side of the PU layer, and drying to obtain a wear-resistant layer; (4) and coating an antifouling coating on the surface of the wear-resistant layer, and drying to obtain the antifouling layer. According to the preparation method of the TPU electronic packaging leather material, the PU layer is directly formed on the surface of the release paper, the TPU layer is obtained on the surface of the PU layer, the thinner TPU layer replaces a base cloth layer and a base fabric layer in the traditional synthetic leather, the thickness of a product can be effectively reduced while the product performance is ensured, and the wear-resistant layer and the antifouling layer which are arranged simultaneously can provide good wear-resistant antifouling characteristics.

Description

Preparation method of TPU electronic packaging leather material
Technical Field
The application belongs to the technical field of packaging leather materials, and particularly relates to a preparation method of a TPU electronic packaging leather material.
Background
In recent years, with the increasing occupancy of synthetic leather in the field of electronic packaging, more and more mobile phones, flat panels and pen-type electronic products adopt synthetic leather as a packaging material. In the field of electronic packaging, TPU synthetic leather, which is a name of elastic glass, is gradually favored by more electronic brands because it has transparency similar to glass, and elasticity and hand feeling of leather.
The conventional synthetic leather generally comprises a base cloth layer, a bass foaming layer and a surface layer, and the synthetic leather obtained in this way is generally large in thickness and difficult to further reduce in thickness, which is contrary to the direction of pursuing lightness and thinness of electronic products, and is not beneficial to helping the electronic products to develop towards the direction of lightness and thinness.
For the above reasons, it is necessary to develop a new packaging leather material, which is suitable for the packaging of electronic products and has a reduced thickness, and thus, it is necessary to make a certain contribution to the thinning of electronic products.
Disclosure of Invention
In order to solve the problems, the application discloses a preparation method of a TPU electronic packaging leather material, the preparation method directly forms a PU layer on the surface of release paper, obtains the TPU layer on the surface of the PU layer, and replaces a base cloth layer and a base fabric layer in the traditional synthetic leather with a thinner TPU layer, so that the thickness of a product can be effectively reduced while the performance of the product is ensured, and meanwhile, the arranged wear-resistant layer and the antifouling layer can provide good wear-resistant antifouling property.
The application provides a preparation method of a TPU electronic packaging leather material, which adopts the following technical scheme:
a preparation method of a TPU electronic packaging leather material comprises the following steps:
(1) coating a PU layer mixture on the surface of release paper, and drying to obtain a PU layer;
(2) coating a TPU layer molten material on the surface of the PU layer, and cooling and solidifying the PU layer through a cooling roller to obtain a TPU layer;
(3) removing the release paper, coating the wear-resistant coating on the other side of the PU layer, and drying to obtain a wear-resistant layer;
(4) and coating an antifouling coating on the surface of the wear-resistant layer, and drying to obtain the antifouling layer.
The preparation method of the application subverts the traditional synthetic leather preparation process taking the base cloth layer as the base, and uses the thinner TPU layer to replace the traditional base cloth layer and the traditional Bass layer, so that the thickness of the product is greatly reduced while the physical properties of the product are ensured, and the product has transparency similar to glass, elasticity similar to leather, good hand feeling, and wear-resistant and antifouling properties.
Preferably, the PU layer mixture comprises the following components in parts by weight:
polyurethane resin 100 parts
100-120 parts of solvent
0-0.2 parts of flatting agent
1-2 parts of wear-resistant auxiliary agent
1-3 parts of yellowing-resistant auxiliary agent
0-2 parts of anti-flooding additive
8-15 parts of color paste.
Preferably, the solvent comprises the following components in parts by weight:
70-80 parts of DMF
40-50 parts of ethyl ester.
Preferably, the TPU layer molten material comprises the following components in parts by weight:
TPU particle 100 parts
3-15 parts of color master batch.
Preferably, the wear-resistant coating comprises the following components in parts by weight:
100 portions of water-based resin
3-5 parts of cross-linking agent
3-8 parts of a wear-resistant auxiliary agent.
The wear-resistant coating with the proportion can obtain good wear resistance, provides good guarantee for the PU layer, and can play a good role in protecting the PU layer inside even if the antifouling layer is worn.
Preferably, the aqueous resin is aqueous polyurethane, and the crosslinking agent is an isocyanate crosslinking agent.
Preferably, the antifouling paint comprises the following components in parts by weight:
100 portions of oleoresin
8-12 parts of curing agent
0.5-2 parts of wear-resistant auxiliary agent
3-8 parts of wear-resistant powder
0-2 parts of a yellowing resistant auxiliary agent.
The antifouling paint prepared according to the proportion has the advantages of good antifouling effect, certain fingerprint and stain resistance, good wear resistance, effective improvement of the surface wear-resistant effect of the TPU electronic packaging leather material, and improvement of the service life of an antifouling layer.
Preferably, the oleoresin is an organosilicon modified acrylic resin; the total mass percentage of the wear-resistant auxiliary agent and the wear-resistant powder in the antifouling paint is not less than 5%.
The oleoresin is organic silicon modified acrylic resin, which is beneficial to reducing the surface energy of the antifouling layer and improving the stain resistance effect.
Preferably, the total mass percentage of the wear-resistant assistant and the wear-resistant powder in the antifouling paint is 5.9-6.3%, and the usage ratio of the wear-resistant assistant to the wear-resistant powder is 1: 4-6.
The antifouling paint is added with the wear-resistant additive and the wear-resistant powder simultaneously, the mass ratio of the wear-resistant additive to the wear-resistant powder is controlled within a certain range, and the wear-resistant additive and the wear-resistant powder play a good synergistic wear-resistant role, so that the wear-resistant performance of an antifouling layer is improved, and the overall hand feeling is improved.
Preferably, the wear-resistant auxiliary is an organic silicon wear-resistant auxiliary; the wear-resistant powder is sericite powder, and the particle size is 15-20 mu m.
The wear-resistant assistant is selected from organosilicon wear-resistant assistants, the wear-resistant powder is selected from sericite powder with the particle size of 15-20 mu m, and the sericite powder and the wear-resistant powder have a synergistic effect, so that a good wear-resistant effect is achieved, and a good hand feeling is obtained.
The application has the following beneficial effects:
(1) according to the preparation method of the TPU electronic packaging leather material, the PU layer is directly formed on the surface of the release paper, the TPU layer is obtained on the surface of the PU layer, the thinner TPU layer replaces a base cloth layer and a base fabric layer in the traditional synthetic leather, the thickness of a product can be effectively reduced while the product performance is ensured, and the wear-resistant layer and the antifouling layer which are arranged simultaneously can provide good wear-resistant antifouling characteristics.
(2) The antifouling paint for preparing the antifouling layer is based on the oleoresin, and is added with the wear-resistant auxiliary agent, the wear-resistant powder and the like, so that the antifouling paint has a good antifouling effect, plays a certain role in fingerprint prevention and stain resistance, has good wear resistance, can effectively improve the surface wear-resistant effect of the TPU electronic packaging leather material, and prolongs the service life of the antifouling layer.
(3) The anti-abrasion additive and the anti-abrasion powder added in the anti-fouling paint are added according to a certain mass ratio, the anti-abrasion additive is an organic silicon type anti-abrasion additive, the anti-abrasion powder is sericite powder, and the anti-abrasion powder and the sericite powder have a synergistic effect, so that a good anti-abrasion effect can be achieved, and a good hand feeling can be obtained.
Drawings
The present application is further described below with reference to the drawings and examples.
FIG. 1 is a schematic structural view of a TPU electronic packaging leather material prepared by the present application;
in the figure: 1. a PU layer; 2. a TPU layer; 3. a wear layer; 4. and an antifouling layer.
Detailed Description
The present application will now be described in further detail with reference to examples.
The TPU electronic packaging leather material prepared by the application has a structure as shown in figure 1, wherein from bottom to top: TPU layer 2, PU layer 1, wear layer 3 and antifouling layer 4.
The waterborne polyurethane SC-6633 used in the application is purchased from Wenzhou thinking New materials Co., Ltd; abrasion resistance aid HM-186 is available from Steyr Fine coatings (Suzhou) Inc.; oleoresin 3311F was obtained from puss polymer materials ltd, jiaxing; curing agent 299 is purchased from blisk polymer materials ltd; the wear-resistant auxiliary 9520 is purchased from Shanghai minister next practical Co Ltd; the wear-resistant auxiliary 4251 is purchased from Hangzhou Chong scientific and technological development company, Ltd; sericite powder was purchased from Chuzhou Gerui mining, Inc.; the silicon micropowder is purchased from Chuzhou Gerui mining Limited liability company; oleoresin SD-6377M was obtained from Huai' an Yongyu chemical Co., Ltd.
Example 1
Preparing raw materials:
PU layer mixture:
the solvent is prepared by mixing 70 parts of DMF and 40 parts of ethyl ester;
the PU layer mixture comprises: 100 parts of polyurethane resin, 100 parts of solvent, 1 part of wear-resistant additive 9520, 1 part of yellowing-resistant additive UV-571 and 8 parts of color paste.
Melting of TPU layer:
100 parts of TPU particles and 3 parts of color master batch.
Wear-resistant paint:
100 parts of waterborne polyurethane SC-6633, 3 parts of HDI and 8 parts of wear-resistant additive HM-186.
Antifouling paint:
100 parts of oleoresin 3311F, 8 parts of curing agent 299, 0.9 part of wear-resistant additive 9520 and 5.1 parts of sericite powder.
Preparing a TPU electronic packaging leather material:
(1) firstly coating a PU layer mixture on the surface of release paper, and then sequentially passing through a 60 +/-10 ℃ temperature zone, a 70 +/-10 ℃ temperature zone, a 80 +/-5 ℃ temperature zone and a 110 +/-5 ℃ temperature zone at a speed of 6 m/min; then coating the PU layer mixture for the second time, and then sequentially passing through a 60 +/-5 ℃ temperature zone, a 70 +/-5 ℃ temperature zone, a 80 +/-5 ℃ temperature zone, a 90 +/-5 ℃ temperature zone and a 110 +/-5 ℃ temperature zone at the speed of 6 m/min; finally, coating the PU layer mixture for the third time, and then sequentially passing through a 70 +/-5 ℃ temperature zone, a 80 +/-5 ℃ temperature zone and a 90 +/-5 ℃ temperature zone at the speed of 6 m/min; obtaining a PU layer;
(2) extruding the molten material to spray a film on the back of the PU layer by a double screw at the temperature of 170-;
(3) removing the release paper, coating the wear-resistant coating on the surface of the PU layer, and sequentially passing through a 130 +/-5 ℃ temperature zone, a 130 +/-5 ℃ temperature zone and a 150 +/-5 ℃ temperature zone at a speed of 7 m/min to obtain a wear-resistant layer;
(4) coating antifouling paint on the surface of the wear-resistant layer, and then sequentially passing through a temperature region of 130 +/-5 ℃, a temperature region of 130 +/-5 ℃ and a temperature region of 150 +/-5 ℃ at the speed of 6 m/min to obtain the antifouling layer.
Example 2
Preparing raw materials:
PU layer mixture:
the solvent is formed by mixing 80 parts of DMF and 50 parts of ethyl ester;
the PU layer mixture comprises: 100 parts of polyurethane resin, 120 parts of solvent, 0.2 part of flatting agent, 2 parts of wear-resistant assistant 9520, 3 parts of yellowing-resistant assistant UV-571, 2 parts of anti-flooding assistant and 15 parts of color paste.
Melting of TPU layer:
100 parts of TPU particles and 15 parts of color masterbatch.
Wear-resistant paint:
100 parts of waterborne polyurethane SC-6633, 5 parts of HDI and 3 parts of wear-resistant additive HM-186.
Antifouling paint:
100 parts of oleoresin 3311F, 12 parts of curing agent 299, 1.7 parts of wear-resistant additive 9520, 6.8 parts of sericite powder and 2 parts of yellowing-resistant additive UV-571.
Preparing a TPU electronic packaging leather material:
(1) firstly coating a PU layer mixture on the surface of release paper, and then sequentially passing through a 60 +/-10 ℃ temperature zone, a 70 +/-10 ℃ temperature zone, a 80 +/-5 ℃ temperature zone and a 110 +/-5 ℃ temperature zone at a speed of 6 m/min; then coating the PU layer mixture for the second time, and then sequentially passing through a 60 +/-5 ℃ temperature zone, a 70 +/-5 ℃ temperature zone, a 80 +/-5 ℃ temperature zone, a 90 +/-5 ℃ temperature zone and a 110 +/-5 ℃ temperature zone at the speed of 6 m/min; finally, coating the PU layer mixture for the third time, and then sequentially passing through a 70 +/-5 ℃ temperature zone, a 80 +/-5 ℃ temperature zone and a 90 +/-5 ℃ temperature zone at the speed of 6 m/min; obtaining a PU layer;
(2) extruding the molten material to spray a film on the back of the PU layer by a double screw at the temperature of 170-;
(3) removing the release paper, coating the wear-resistant coating on the surface of the PU layer, and sequentially passing through a 130 +/-5 ℃ temperature zone, a 130 +/-5 ℃ temperature zone and a 150 +/-5 ℃ temperature zone at a speed of 7 m/min to obtain a wear-resistant layer;
(4) coating antifouling paint on the surface of the wear-resistant layer, and then sequentially passing through a temperature region of 130 +/-5 ℃, a temperature region of 130 +/-5 ℃ and a temperature region of 150 +/-5 ℃ at the speed of 6 m/min to obtain the antifouling layer.
Example 3
Preparing raw materials:
PU layer mixture:
the solvent is formed by mixing 75 parts of DMF and 45 parts of ethyl ester;
the PU layer mixture comprises: 100 parts of polyurethane resin, 110 parts of solvent, 0.1 part of flatting agent, 1.5 parts of wear-resistant assistant 9520, 2 parts of yellowing-resistant assistant UV-571, 1 part of anti-flooding assistant and 11 parts of color paste.
Melting of TPU layer:
100 parts of TPU particles and 9 parts of color masterbatch.
Wear-resistant paint:
100 parts of waterborne polyurethane SC-6633, 4 parts of HDI and 6 parts of wear-resistant additive HM-186.
Antifouling paint:
100 parts of oleoresin 3311F, 10 parts of curing agent 299, 1.2 parts of wear-resistant additive 9520, 6 parts of sericite powder and 1 part of yellowing-resistant additive UV-571.
Preparing a TPU electronic packaging leather material:
(1) firstly coating a PU layer mixture on the surface of release paper, and then sequentially passing through a 60 +/-10 ℃ temperature zone, a 70 +/-10 ℃ temperature zone, a 80 +/-5 ℃ temperature zone and a 110 +/-5 ℃ temperature zone at a speed of 6 m/min; then coating the PU layer mixture for the second time, and then sequentially passing through a 60 +/-5 ℃ temperature zone, a 70 +/-5 ℃ temperature zone, a 80 +/-5 ℃ temperature zone, a 90 +/-5 ℃ temperature zone and a 110 +/-5 ℃ temperature zone at the speed of 6 m/min; finally, coating the PU layer mixture for the third time, and then sequentially passing through a 70 +/-5 ℃ temperature zone, a 80 +/-5 ℃ temperature zone and a 90 +/-5 ℃ temperature zone at the speed of 6 m/min; obtaining a PU layer;
(2) extruding the molten material to spray a film on the back of the PU layer by a double screw at the temperature of 170-;
(3) removing the release paper, coating the wear-resistant coating on the surface of the PU layer, and sequentially passing through a 130 +/-5 ℃ temperature zone, a 130 +/-5 ℃ temperature zone and a 150 +/-5 ℃ temperature zone at a speed of 7 m/min to obtain a wear-resistant layer;
(4) coating antifouling paint on the surface of the wear-resistant layer, and then sequentially passing through a temperature region of 130 +/-5 ℃, a temperature region of 130 +/-5 ℃ and a temperature region of 150 +/-5 ℃ at the speed of 6 m/min to obtain the antifouling layer.
Example 4
Preparing raw materials:
PU layer mixture:
the solvent is formed by mixing 75 parts of DMF and 45 parts of ethyl ester;
the PU layer mixture comprises: 100 parts of polyurethane resin, 110 parts of solvent, 0.1 part of flatting agent, 1.5 parts of wear-resistant assistant 9520, 2 parts of yellowing-resistant assistant UV-571, 1 part of anti-flooding assistant and 11 parts of color paste.
Melting of TPU layer:
100 parts of TPU particles and 9 parts of color masterbatch.
Wear-resistant paint:
100 parts of waterborne polyurethane SC-6633, 4 parts of HDI and 6 parts of wear-resistant additive HM-186.
Antifouling paint:
100 parts of oleoresin 3311F, 10 parts of curing agent 299, 1.8 parts of wear-resistant additive 9520, 5.4 parts of sericite powder and 1 part of yellowing-resistant additive UV-571.
Preparing a TPU electronic packaging leather material:
(1) firstly coating a PU layer mixture on the surface of release paper, and then sequentially passing through a 60 +/-10 ℃ temperature zone, a 70 +/-10 ℃ temperature zone, a 80 +/-5 ℃ temperature zone and a 110 +/-5 ℃ temperature zone at a speed of 6 m/min; then coating the PU layer mixture for the second time, and then sequentially passing through a 60 +/-5 ℃ temperature zone, a 70 +/-5 ℃ temperature zone, a 80 +/-5 ℃ temperature zone, a 90 +/-5 ℃ temperature zone and a 110 +/-5 ℃ temperature zone at the speed of 6 m/min; finally, coating the PU layer mixture for the third time, and then sequentially passing through a 70 +/-5 ℃ temperature zone, a 80 +/-5 ℃ temperature zone and a 90 +/-5 ℃ temperature zone at the speed of 6 m/min; obtaining a PU layer;
(2) extruding the molten material to spray a film on the back of the PU layer by a double screw at the temperature of 170-;
(3) removing the release paper, coating the wear-resistant coating on the surface of the PU layer, and sequentially passing through a 130 +/-5 ℃ temperature zone, a 130 +/-5 ℃ temperature zone and a 150 +/-5 ℃ temperature zone at a speed of 7 m/min to obtain a wear-resistant layer;
(4) coating antifouling paint on the surface of the wear-resistant layer, and then sequentially passing through a temperature region of 130 +/-5 ℃, a temperature region of 130 +/-5 ℃ and a temperature region of 150 +/-5 ℃ at the speed of 6 m/min to obtain the antifouling layer.
Example 5
Preparing raw materials:
PU layer mixture:
the solvent is formed by mixing 75 parts of DMF and 45 parts of ethyl ester;
the PU layer mixture comprises: 100 parts of polyurethane resin, 110 parts of solvent, 0.1 part of flatting agent, 1.5 parts of wear-resistant assistant 9520, 2 parts of yellowing-resistant assistant UV-571, 1 part of anti-flooding assistant and 11 parts of color paste.
Melting of TPU layer:
100 parts of TPU particles and 9 parts of color masterbatch.
Wear-resistant paint:
100 parts of waterborne polyurethane SC-6633, 4 parts of HDI and 6 parts of wear-resistant additive HM-186.
Antifouling paint:
100 parts of oleoresin 3311F, 10 parts of curing agent 299, 0.9 part of wear-resistant additive 9520, 6.3 parts of sericite powder and 1 part of yellowing-resistant additive UV-571.
Preparing a TPU electronic packaging leather material:
(1) firstly coating a PU layer mixture on the surface of release paper, and then sequentially passing through a 60 +/-10 ℃ temperature zone, a 70 +/-10 ℃ temperature zone, a 80 +/-5 ℃ temperature zone and a 110 +/-5 ℃ temperature zone at a speed of 6 m/min; then coating the PU layer mixture for the second time, and then sequentially passing through a 60 +/-5 ℃ temperature zone, a 70 +/-5 ℃ temperature zone, a 80 +/-5 ℃ temperature zone, a 90 +/-5 ℃ temperature zone and a 110 +/-5 ℃ temperature zone at the speed of 6 m/min; finally, coating the PU layer mixture for the third time, and then sequentially passing through a 70 +/-5 ℃ temperature zone, a 80 +/-5 ℃ temperature zone and a 90 +/-5 ℃ temperature zone at the speed of 6 m/min; obtaining a PU layer;
(2) extruding the molten material to spray a film on the back of the PU layer by a double screw at the temperature of 170-;
(3) removing the release paper, coating the wear-resistant coating on the surface of the PU layer, and sequentially passing through a 130 +/-5 ℃ temperature zone, a 130 +/-5 ℃ temperature zone and a 150 +/-5 ℃ temperature zone at a speed of 7 m/min to obtain a wear-resistant layer;
(4) coating antifouling paint on the surface of the wear-resistant layer, and then sequentially passing through a temperature region of 130 +/-5 ℃, a temperature region of 130 +/-5 ℃ and a temperature region of 150 +/-5 ℃ at the speed of 6 m/min to obtain the antifouling layer.
Comparative example 1
Preparing raw materials:
PU layer mixture:
the solvent is formed by mixing 75 parts of DMF and 45 parts of ethyl ester;
the PU layer mixture comprises the following components: 100 parts of polyurethane resin, 110 parts of solvent, 0.1 part of flatting agent, 1.5 parts of wear-resistant assistant 9520, 2 parts of yellowing-resistant assistant UV-571, 1 part of anti-flooding assistant and 11 parts of color paste.
Melting of TPU layer:
100 parts of TPU particles and 9 parts of color masterbatch.
Wear-resistant paint:
100 parts of waterborne polyurethane SC-6633, 4 parts of HDI and 6 parts of wear-resistant additive HM-186.
Antifouling paint:
100 parts of oleoresin SD-6377M, 10 parts of curing agent 299, 1.2 parts of wear-resistant additive 9520, 6 parts of sericite powder and 1 part of yellowing-resistant additive UV-571.
Preparing a TPU electronic packaging leather material:
(1) firstly coating a PU layer mixture on the surface of release paper, and then sequentially passing through a 60 +/-10 ℃ temperature zone, a 70 +/-10 ℃ temperature zone, a 80 +/-5 ℃ temperature zone and a 110 +/-5 ℃ temperature zone at a speed of 6 m/min; then coating the PU layer mixture for the second time, and then sequentially passing through a 60 +/-5 ℃ temperature zone, a 70 +/-5 ℃ temperature zone, a 80 +/-5 ℃ temperature zone, a 90 +/-5 ℃ temperature zone and a 110 +/-5 ℃ temperature zone at the speed of 6 m/min; finally, coating the PU layer mixture for the third time, and then sequentially passing through a 70 +/-5 ℃ temperature zone, a 80 +/-5 ℃ temperature zone and a 90 +/-5 ℃ temperature zone at the speed of 6 m/min; obtaining a PU layer;
(2) extruding the molten material to spray a film on the back of the PU layer by a double screw at the temperature of 170-;
(3) removing the release paper, coating the wear-resistant coating on the surface of the PU layer, and sequentially passing through a 130 +/-5 ℃ temperature zone, a 130 +/-5 ℃ temperature zone and a 150 +/-5 ℃ temperature zone at a speed of 7 m/min to obtain a wear-resistant layer;
(4) coating antifouling paint on the surface of the wear-resistant layer, and then sequentially passing through a temperature region of 130 +/-5 ℃, a temperature region of 130 +/-5 ℃ and a temperature region of 150 +/-5 ℃ at the speed of 6 m/min to obtain the antifouling layer.
Comparative example 2
Preparing raw materials:
PU layer mixture:
the solvent is formed by mixing 75 parts of DMF and 45 parts of ethyl ester;
the PU layer mixture comprises: 100 parts of polyurethane resin, 110 parts of solvent, 0.1 part of flatting agent, 1.5 parts of wear-resistant assistant 9520, 2 parts of yellowing-resistant assistant UV-571, 1 part of anti-flooding assistant and 11 parts of color paste.
Melting of TPU layer:
100 parts of TPU particles and 9 parts of color masterbatch.
Wear-resistant paint:
100 parts of waterborne polyurethane SC-6633, 4 parts of HDI and 6 parts of wear-resistant additive HM-186.
Antifouling paint:
100 parts of oleoresin 3311F, 10 parts of curing agent 299, 1.2 parts of wear-resistant assistant 4251, 6 parts of sericite powder and 1 part of yellowing-resistant assistant UV-571.
Preparing a TPU electronic packaging leather material:
(1) firstly coating a PU layer mixture on the surface of release paper, and then sequentially passing through a 60 +/-10 ℃ temperature zone, a 70 +/-10 ℃ temperature zone, a 80 +/-5 ℃ temperature zone and a 110 +/-5 ℃ temperature zone at a speed of 6 m/min; then coating the PU layer mixture for the second time, and then sequentially passing through a 60 +/-5 ℃ temperature zone, a 70 +/-5 ℃ temperature zone, a 80 +/-5 ℃ temperature zone, a 90 +/-5 ℃ temperature zone and a 110 +/-5 ℃ temperature zone at the speed of 6 m/min; finally, coating the PU layer mixture for the third time, and then sequentially passing through a 70 +/-5 ℃ temperature zone, a 80 +/-5 ℃ temperature zone and a 90 +/-5 ℃ temperature zone at the speed of 6 m/min; obtaining a PU layer;
(2) extruding a molten material curtain film at the temperature of 200 ℃ through a double screw at 170-;
(3) removing the release paper, coating the wear-resistant coating on the surface of the PU layer, and sequentially passing through a 130 +/-5 ℃ temperature zone, a 130 +/-5 ℃ temperature zone and a 150 +/-5 ℃ temperature zone at a speed of 7 m/min to obtain a wear-resistant layer;
(4) coating antifouling paint on the surface of the wear-resistant layer, and then sequentially passing through a temperature region of 130 +/-5 ℃, a temperature region of 130 +/-5 ℃ and a temperature region of 150 +/-5 ℃ at the speed of 6 m/min to obtain the antifouling layer.
Comparative example 3
Preparing raw materials:
PU layer mixture:
the solvent is formed by mixing 75 parts of DMF and 45 parts of ethyl ester;
the PU layer mixture comprises: 100 parts of polyurethane resin, 110 parts of solvent, 0.1 part of flatting agent, 1.5 parts of wear-resistant assistant 9520, 2 parts of yellowing-resistant assistant UV-571, 1 part of anti-flooding assistant and 11 parts of color paste.
Melting of TPU layer:
100 parts of TPU particles and 9 parts of color masterbatch.
Wear-resistant paint:
100 parts of waterborne polyurethane SC-6633, 4 parts of HDI and 6 parts of wear-resistant additive HM-186.
Antifouling paint:
100 parts of oleoresin 3311F, 10 parts of curing agent 299, 1.2 parts of wear-resistant additive 9520, 6 parts of silicon micropowder and 1 part of yellowing-resistant additive UV-571.
Preparing a TPU electronic packaging leather material:
(1) firstly coating a PU layer mixture on the surface of release paper, and then sequentially passing through a 60 +/-10 ℃ temperature zone, a 70 +/-10 ℃ temperature zone, a 80 +/-5 ℃ temperature zone and a 110 +/-5 ℃ temperature zone at a speed of 6 m/min; then coating the PU layer mixture for the second time, and then sequentially passing through a 60 +/-5 ℃ temperature zone, a 70 +/-5 ℃ temperature zone, a 80 +/-5 ℃ temperature zone, a 90 +/-5 ℃ temperature zone and a 110 +/-5 ℃ temperature zone at the speed of 6 m/min; finally, coating the PU layer mixture for the third time, and then sequentially passing through a 70 +/-5 ℃ temperature zone, a 80 +/-5 ℃ temperature zone and a 90 +/-5 ℃ temperature zone at the speed of 6 m/min; obtaining a PU layer;
(2) extruding the molten material to spray a film on the back of the PU layer by a double screw at the temperature of 170-;
(3) removing the release paper, coating the wear-resistant coating on the surface of the PU layer, and sequentially passing through a 130 +/-5 ℃ temperature zone, a 130 +/-5 ℃ temperature zone and a 150 +/-5 ℃ temperature zone at a speed of 7 m/min to obtain a wear-resistant layer;
(4) coating antifouling paint on the surface of the wear-resistant layer, and then sequentially passing through a temperature region of 130 +/-5 ℃, a temperature region of 130 +/-5 ℃ and a temperature region of 150 +/-5 ℃ at the speed of 6 m/min to obtain the antifouling layer.
The TPU electronic packaging leather materials prepared in each example and each comparative example are subjected to performance tests, and the test results are shown in Table 1.
RCA wear resistance: and loading 175 g, fixing the product on a jig, enabling the surface to be tested to be vertical to the roller, and rubbing for more than 200 times to be qualified.
Light resistance: sticking the sample on the non-irradiation surface with black adhesive paper, and subjecting the treated sample to black board temperature of 60 deg.C and irradiance of 0.63W/m2And irradiating at 55 ℃ in the condensation chamber for 4 h for condensation for 4 h, wherein the cycle is one cycle and the total time is 96 h. After the test, no cracks, no blisters, no peeling were scored as OK, otherwise as NG.
5N hardness bar: the product is fixed, the surface to be tested is tightly attached to the jig and cannot be suspended, each product is tested at 3 positions, the hardness bar is perpendicular to the test surface and moves at a constant speed of more than 20 mm, no scratch or drop occurs under the condition of 5N, and the result is recorded as OK, otherwise, the result is recorded as NG.
Lipstick resistance: selecting 3 squares of 1X 1cm on the surface of a sample, repeatedly coating the squares with the Robinia pseudoacacia R31S/B33, standing for 24 hours in a room temperature environment, repeatedly wiping for 10 times by cotton cloth, and marking as OK if no coloring, no crack, no bubble and no shedding are generated after wiping, or marking as NG if not.
Hand feeling: compared with the standard product, the hand feeling is similar to or better than that of the standard product and is recorded as OK, and is recorded as NG.
TABLE 1
RCA wear-resisting (second) Light resistance 5N hardness rod Lipstick Hand feeling
Example 1 230 OK OK OK OK
Example 2 280 OK OK OK OK
Example 3 250 OK OK OK OK
Example 4 275 OK NG OK NG
Example 5 215 OK OK OK OK
Comparative example 1 205 NG NG NG OK
Comparative example 2 185 OK NG OK OK
Comparative example 3 210 OK OK OK NG
As can be seen from Table 1, the RCA wear resistance of the leather materials prepared in the embodiments 1-3 of the application can reach more than 200 times, and the light resistance, the 5N hardness bar test, the lipstick resistance test and the hand feeling test are all qualified.
Example 4 is different from example 3 in that less wear-resistant additive 9520 and more sericite powder are added, and although the RCA wear-resistant times are improved, hardness bar test and hand feeling are deteriorated, which indicates that the increase of sericite powder can improve wear resistance, but the hand feeling is affected.
The difference between example 5 and example 3 is that more wear-resistant additive 9520 and less sericite powder are added, and although the light resistance, hardness bar, lipstick resistance and hand feeling are all qualified, the RCA wear-resistant times are reduced to 215, which shows that controlling the wear-resistant additive and the wear-resistant powder in a certain proportion helps to balance the performance of the product.
In comparative example 1, the oleoresin SD-6377M was used in place of the oleoresin 3311F in example 3, and the properties were significantly reduced except for satisfactory hand, indicating that SD-6377M is not suitable for use in the system.
In comparative example 2, the wear-resistant additive 4251 is used to replace the wear-resistant additive 9520 in example 3, so that the wear resistance and hardness are poor, and the effect of using the wear-resistant additive 4251 in combination with wear-resistant powder is poor.
The wear-resistant powder used in comparative example 3 was a fine silica powder, and as compared with example 3, the RCA wear resistance times were decreased, and the hand was deteriorated. It is shown that the wear-resistant additive 9520 and the sericite powder are adopted to help obtain better wear-resistant effect.
The thickness of the leather material prepared by the embodiment is only 0.2-0.3 mm, the thickness is smaller than that of the material prepared by the traditional mode (the thickness is more than 0.4 mm), and the physical property can completely reach the level of the base cloth material and is even better.
The present embodiment is merely illustrative and not restrictive, and various changes and modifications may be made by persons skilled in the art without departing from the scope of the present invention as defined in the appended claims. The technical scope of the present application is not limited to the contents of the specification, and must be determined according to the scope of the claims.

Claims (10)

1. A preparation method of a TPU electronic packaging leather material is characterized by comprising the following steps: the method comprises the following steps:
(1) coating a PU layer mixture on the surface of release paper, and drying to obtain a PU layer;
(2) coating a TPU layer molten material on the surface of the PU layer, and cooling and solidifying the PU layer through a cooling roller to obtain a TPU layer;
(3) removing the release paper, coating the wear-resistant coating on the other side of the PU layer, and drying to obtain a wear-resistant layer;
(4) and coating an antifouling coating on the surface of the wear-resistant layer, and drying to obtain the antifouling layer.
2. The process for preparing the TPU electronic packaging leather material as claimed in claim 1, wherein: the PU layer mixture comprises the following components in parts by weight:
polyurethane resin 100 parts
100-120 parts of solvent
0-0.2 parts of flatting agent
1-2 parts of wear-resistant auxiliary agent
1-3 parts of yellowing-resistant auxiliary agent
0-2 parts of anti-flooding additive
8-15 parts of color paste.
3. The process for preparing the TPU electronic packaging leather material as claimed in claim 2, wherein: the solvent comprises the following components in parts by weight:
70-80 parts of DMF
40-50 parts of ethyl ester.
4. The process for preparing the TPU electronic packaging leather material as claimed in claim 1, wherein: the TPU layer molten material comprises the following components in parts by weight:
TPU particle 100 parts
3-15 parts of color master batch.
5. The process for preparing the TPU electronic packaging leather material as claimed in claim 1, wherein: the wear-resistant coating comprises the following components in parts by weight:
100 portions of water-based resin
3-5 parts of cross-linking agent
3-8 parts of a wear-resistant auxiliary agent.
6. The method for preparing the TPU electronic packaging leather material as claimed in claim 5, characterized in that: the waterborne resin is waterborne polyurethane, and the cross-linking agent is isocyanate cross-linking agent.
7. The process for preparing the TPU electronic packaging leather material as claimed in claim 1, wherein: the antifouling paint comprises the following components in parts by weight:
100 portions of oleoresin
8-12 parts of curing agent
0.5-2 parts of wear-resistant auxiliary agent
3-8 parts of wear-resistant powder
0-2 parts of a yellowing resistant auxiliary agent.
8. The process for preparing the TPU electronic packaging leather material of claim 7, wherein: the oleoresin is organic silicon modified acrylic resin; the total mass percentage of the wear-resistant auxiliary agent and the wear-resistant powder in the antifouling paint is not less than 5%.
9. The process for preparing the TPU electronic packaging leather material of claim 7, wherein: the antifouling paint comprises 5.9-6.3% of wear-resistant auxiliary and wear-resistant powder by mass, and the mass ratio of the wear-resistant auxiliary to the wear-resistant powder is 1: 4-6.
10. The process for preparing the TPU electronic packaging leather material of claim 7, wherein: the wear-resistant auxiliary agent is an organic silicon wear-resistant auxiliary agent; the wear-resistant powder is sericite powder, and the particle size is 15-20 mu m.
CN202210084903.7A 2022-01-25 2022-01-25 Preparation method of TPU electronic packaging leather material Pending CN114472114A (en)

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