CN112962328B - Special interlayer process for thin film material - Google Patents
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- CN112962328B CN112962328B CN202110152852.2A CN202110152852A CN112962328B CN 112962328 B CN112962328 B CN 112962328B CN 202110152852 A CN202110152852 A CN 202110152852A CN 112962328 B CN112962328 B CN 112962328B
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
- D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
- D06N3/145—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes two or more layers of polyurethanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
- D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
- D06N3/142—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes mixture of polyurethanes with other resins in the same layer
- D06N3/144—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes mixture of polyurethanes with other resins in the same layer with polyurethane and polymerisation products, e.g. acrylics, PVC
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
- C08J2375/06—Polyurethanes from polyesters
Abstract
The invention relates to the technical field of interlayer processing, in particular to a special interlayer process for a thin film material, which comprises the following steps: (1) coating polyurethane polyacrylate UV coating on the surface of a workpiece to be processed, and performing UV semi-curing to form a semi-cured adhesive layer; (2) paving a plurality of TPU colored thin films on the surface of the semi-solidified glue layer; (3) and coating a polyurethane polyacrylate UV coating on the semi-cured adhesive layer paved with the TPU colored film, and performing UV full curing to form the special interlayer. According to the invention, the TPU colored film is clamped in the two layers of polyurethane polyacrylate UV coatings, so that a special flaky color effect is realized, the appearance is mislaid, the smooth surface is still formed by touching with hands, the hand feeling is good, and the problem of falling of the TPU colored film is basically avoided.
Description
Technical Field
The invention relates to the technical field of interlayer processing, in particular to a special interlayer process for a thin film material.
Background
Zippers (zippers), which are connectors for uniting or separating articles by means of a continuous arrangement of zipper teeth, are now widely used in clothing, bags, tents, etc. The zipper cloth bag is used as an important part for bearing the zipper teeth and other zipper components, and the appearance of the zipper cloth bag also has great influence on the overall appearance of the garment. The existing zipper cloth belt has a single expression mode, generally only has simple color expression, and the problems of color loss, fading and the like are easily caused by dyeing.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention aims to provide a special interlayer process for a thin film material.
The purpose of the invention is realized by the following technical scheme:
a special interlayer process for a thin film material comprises the following steps:
(1) coating polyurethane polyacrylate UV coating on the surface of a workpiece to be processed, and performing UV semi-curing to form a semi-cured adhesive layer;
(2) paving a plurality of TPU colored thin films on the surface of the semi-solidified glue layer;
(3) coating polyurethane polyacrylate UV coating on the semi-cured glue layer paved with the TPU colored film, and performing UV full curing to form a special interlayer;
the polyurethane polyacrylate UV coating comprises the following raw materials in parts by weight:
40-60 parts of polyurethane prepolymer
15-25 parts of acrylic monomer
1-2 parts of a photoinitiator;
the preparation method of the polyurethane prepolymer comprises the following steps: mixing 25-35 parts by weight of isocyanate, 10-15 parts by weight of hydroxyethyl acrylate, 0.05-0.1 part by weight of catalyst and 0.01-0.03 part by weight of polymerization inhibitor, heating to 70-90 ℃, carrying out heat preservation reaction for 2-3h, adding 40-60 parts by weight of polyether polyol, and carrying out heat preservation reaction for 2-3h to obtain the polyurethane prepolymer;
the TPU colored film comprises the following raw materials in parts by weight:
the preparation method of the hydroxyl polyacrylate comprises the following steps: mixing 10-20 parts by weight of hydroxyethyl acrylate, 15-25 parts by weight of methyl methacrylate, 2-6 parts by weight of acrylic acid, 12-16 parts by weight of trimethylolpropane triacrylate, 0.1-0.2 part by weight of ammonium persulfate and 80-100 parts by weight of deionized water, heating to 50-70 ℃, reacting for 1-2h, filtering, drying and washing to obtain the hydroxyl polyacrylate.
According to the invention, the TPU colored film is clamped in the two layers of polyurethane polyacrylate UV coatings, so that a special flaky color effect is realized, the appearance is mislaid, the smooth surface is still formed by touching with hands, the hand feeling is good, and the problem of falling of the TPU colored film is basically avoided.
However, the TPU colored film serving as the interlayer inevitably has the problems of poor compatibility and large mechanical difference with a glue layer formed by curing a urethane polyacrylate UV coating, and a to-be-processed member, such as a zipper cloth tape, is easily subjected to stress concentration at an interface between the TPU colored film and the glue layer in the repeated bending process, so that whitening is easily caused, the appearance effect is affected, and the durability of the product is reduced.
According to the invention, firstly, the polyurethane polyacrylate UV coating is used as a solidified outer adhesive layer, the TPU colored film is used as an interlayer, and the polyurethane UV coating and the TPU colored film are both made of polyurethane materials, so that the compatibility is better, and the solidified adhesive layer is tightly combined with the TPU colored film; in addition, in the TPU colored film, trimethylolpropane triacrylate is used as a monomer to prepare hydroxyl acrylate, the hydroxyl acrylate is added into a polyurethane system to form an interpenetrating network, the prepared TPU colored film has more carbon-carbon double bond active groups, and can be further subjected to free radical initiated polymerization with a semi-cured polyurethane polyacrylate UV coating and a polyurethane polyacrylate UV coating which does not start to be cured, so that the bridging of molecular chains is realized, a common network polymer is formed, the integral interface performance is improved, the phenomenon of whitening caused by repeated bending is avoided, the integral toughness of a special interlayer material can be obviously improved, cracks are not easy to occur, and the durability of a special interlayer is greatly improved.
In the preparation method of the polyurethane prepolymer, the isocyanate is isophorone diisocyanate, the catalyst is an organic tin catalyst, and the polymerization inhibitor is hydroquinone and/or p-methoxyphenol.
Wherein the acrylic monomer consists of ethoxy ethyl acrylate, trimethylolpropane triacrylate and isobornyl acrylate in a weight ratio of 1-2:1-3: 1. In the acrylic monomers selected by the invention, ethoxy ethyl ethoxy acrylate can obviously improve the flexibility of the adhesive layer, trimethylolpropane triacrylate has a multifunctional group, so that the curing rate can be improved, the crosslinking effect of the adhesive layer and a TPU colored film can also be improved, isobornyl acrylate can reduce the curing shrinkage rate, and the phenomenon that the adhesive layer generates excessive internal stress due to the excessively high curing rate is avoided.
Wherein the photoinitiator consists of a photoinitiator 184 and a photoinitiator TPO according to the weight ratio of 1: 1.
In the TPU colored film, the isocyanate is diphenylmethane diisocyanate, the polyester polyol is polycaprolactone diol, the chain extender is 1, 4-butanediol and/or 1, 6-hexanediol, and the catalyst is an organic tin catalyst.
Wherein the weight average molecular weight of the polyester polyol is 1500-2000.
The preparation method of the TPU colored film comprises the following steps: weighing polyester polyol, hydroxyl polyacrylate, a chain extender, a pigment and a catalyst according to the formula ratio, and heating to 90-110 ℃ to obtain a premix; weighing isocyanate, heating to 50-70 ℃, adding the isocyanate into the premix, mixing, carrying out tape casting film forming, and cutting and forming to obtain the TPU colored film.
Wherein, the TPU colored film is cuboid, the length is 4-6mm, the width is 1-3mm, and the thickness is 100-200 μm.
Wherein the irradiation intensity of the UV semi-curing is 200-300mJ/cm2The time is 4-6 s; the irradiation intensity of the UV full-curing is 400-500mJ/cm2The time is 6-10 s.
The semi-curing of the invention can ensure that the semi-cured layer has certain initial adhesion, thereby firmly bonding the TPU colored film to the surface and avoiding the displacement or dislocation of the TPU colored film in the secondary coating process so as to expose the surface.
Wherein, the piece to be processed is a zipper cloth belt, a vamp or a dress.
The invention has the beneficial effects that:
1. according to the invention, the TPU colored film is clamped in the two layers of polyurethane polyacrylate UV coatings, so that a special flaky color effect is realized, the appearance is mislaid, the smooth surface is still formed by touching with hands, the hand feeling is good, and the problem of falling of the TPU colored film is basically avoided;
2. according to the invention, firstly, the polyurethane polyacrylate UV coating is used as a solidified outer adhesive layer, the TPU colored film is used as an interlayer, and the polyurethane UV coating and the TPU colored film are both made of polyurethane materials, so that the compatibility is better, and the solidified adhesive layer is tightly combined with the TPU colored film; in addition, in the TPU colored film, trimethylolpropane triacrylate is used as a monomer to prepare hydroxyl acrylate, the hydroxyl acrylate is added into a polyurethane system to form an interpenetrating network, the prepared TPU colored film has more carbon-carbon double bond active groups, and can be further subjected to free radical initiated polymerization with a semi-cured polyurethane polyacrylate UV coating and a polyurethane polyacrylate UV coating which does not start to be cured, so that the bridging of molecular chains is realized, a common network polymer is formed, the integral interface performance is improved, the phenomenon of whitening caused by repeated bending is avoided, the integral toughness of a special interlayer material can be obviously improved, cracks are not easy to occur, and the durability of a special interlayer is greatly improved.
Detailed Description
The present invention will be further described with reference to the following examples for facilitating understanding of those skilled in the art, and the description of the embodiments is not intended to limit the present invention.
Example 1
A special interlayer process for a thin film material comprises the following steps:
(1) coating polyurethane polyacrylate UV coating on the surface of a workpiece to be processed, and performing UV semi-curing to form a semi-cured adhesive layer;
(2) paving a plurality of TPU colored thin films on the surface of the semi-solidified glue layer;
(3) coating polyurethane polyacrylate UV coating on the semi-cured glue layer paved with the TPU colored film, and performing UV full curing to form a special interlayer;
the polyurethane polyacrylate UV coating comprises the following raw materials in parts by weight:
40 parts of polyurethane prepolymer
Acrylic acid monomer 15 parts
1 part of photoinitiator;
the preparation method of the polyurethane prepolymer comprises the following steps: mixing 25 parts by weight of isocyanate, 10 parts by weight of hydroxyethyl acrylate, 0.05 part by weight of catalyst and 0.01 part by weight of polymerization inhibitor, heating to 70 ℃, carrying out heat preservation reaction for 2 hours, adding 40 parts by weight of polyether polyol, and carrying out heat preservation reaction for 2 hours to obtain the polyurethane prepolymer;
the TPU colored film comprises the following raw materials in parts by weight:
the preparation method of the hydroxyl polyacrylate comprises the following steps: mixing 10 parts by weight of hydroxyethyl acrylate, 15 parts by weight of methyl methacrylate, 2 parts by weight of acrylic acid, 12 parts by weight of trimethylolpropane triacrylate, 0.1 part by weight of ammonium persulfate and 80 parts by weight of deionized water, heating to 50 ℃, reacting for 1 hour, filtering, drying and washing to obtain the hydroxyl polyacrylate.
In the preparation method of the polyurethane prepolymer, the isocyanate is isophorone diisocyanate, the catalyst is an organic tin catalyst, and the polymerization inhibitor is hydroquinone.
The acrylic monomer is composed of ethoxy ethyl acrylate, trimethylolpropane triacrylate and isobornyl acrylate according to the weight ratio of 1:1: 1.
Wherein the photoinitiator consists of a photoinitiator 184 and a photoinitiator TPO according to the weight ratio of 1: 1.
In the TPU colored film, the isocyanate is diphenylmethane diisocyanate, the polyester polyol is polycaprolactone diol, the chain extender is 1, 4-butanediol, and the catalyst is an organic tin catalyst.
Wherein the polyester polyol has a weight average molecular weight of 1500.
The preparation method of the TPU colored film comprises the following steps: weighing polyester polyol, hydroxyl polyacrylate, a chain extender, a pigment and a catalyst according to the formula ratio, and heating to 90 ℃ to obtain a premix; weighing isocyanate, heating to 50 ℃, adding the isocyanate into the premix, mixing, carrying out tape casting film forming, and cutting and forming to obtain the TPU colored film.
The TPU colored film is cuboid, 4mm in length, 1mm in width and 100 microns in thickness.
Wherein the irradiation intensity of the UV semi-curing is 200mJ/cm2The time is 4 s; the irradiation intensity of the UV full-curing is 400mJ/cm2The time is 6 s.
Wherein, the piece to be processed is a zipper cloth belt.
Example 2
A special interlayer process for a thin film material comprises the following steps:
(1) coating polyurethane polyacrylate UV coating on the surface of a workpiece to be processed, and performing UV semi-curing to form a semi-cured adhesive layer;
(2) paving a plurality of TPU colored thin films on the surface of the semi-solidified glue layer;
(3) coating polyurethane polyacrylate UV coating on the semi-cured glue layer paved with the TPU colored film, and performing UV full curing to form a special interlayer;
the polyurethane polyacrylate UV coating comprises the following raw materials in parts by weight:
60 parts of polyurethane prepolymer
Acrylic acid monomer 25 parts
2 parts of a photoinitiator;
the preparation method of the polyurethane prepolymer comprises the following steps: mixing 35 parts by weight of isocyanate, 15 parts by weight of hydroxyethyl acrylate, 0.1 part by weight of catalyst and 0.03 part by weight of polymerization inhibitor, heating to 90 ℃, carrying out heat preservation reaction for 3 hours, adding 60 parts by weight of polyether polyol, and carrying out heat preservation reaction for 3 hours to obtain the polyurethane prepolymer;
the TPU colored film comprises the following raw materials in parts by weight:
the preparation method of the hydroxyl polyacrylate comprises the following steps: and (2) mixing 20 parts by weight of hydroxyethyl acrylate, 25 parts by weight of methyl methacrylate, 6 parts by weight of acrylic acid, 16 parts by weight of trimethylolpropane triacrylate, 0.2 part by weight of ammonium persulfate and 100 parts by weight of deionized water, heating to 70 ℃, reacting for 2 hours, filtering, drying and washing to obtain the hydroxyl polyacrylate.
In the preparation method of the polyurethane prepolymer, the isocyanate is isophorone diisocyanate, the catalyst is an organic tin catalyst, and the polymerization inhibitor is p-methoxyphenol.
The acrylic monomer is composed of ethoxy ethyl acrylate, trimethylolpropane triacrylate and isobornyl acrylate according to the weight ratio of 2:3: 1.
Wherein the photoinitiator consists of a photoinitiator 184 and a photoinitiator TPO according to the weight ratio of 1: 1.
In the TPU colored film, the isocyanate is diphenylmethane diisocyanate, the polyester polyol is polycaprolactone diol, the chain extender is 1, 6-hexanediol, and the catalyst is an organic tin catalyst.
Wherein the polyester polyol has a weight average molecular weight of 2000.
The preparation method of the TPU colored film comprises the following steps: weighing polyester polyol, hydroxyl polyacrylate, a chain extender, a pigment and a catalyst according to the formula ratio, and heating to 110 ℃ to obtain a premix; weighing isocyanate, heating to 70 ℃, adding the isocyanate into the premix, mixing, carrying out tape casting film forming, and cutting and forming to obtain the TPU colored film.
The TPU colored film is cuboid, 6mm in length, 3mm in width and 200 microns in thickness.
Wherein the irradiation intensity of the UV semi-curing is 300mJ/cm2The time is 6 s; the irradiation intensity of the UV full-curing is 500mJ/cm2The time is 10 s.
Wherein, the piece to be processed is a zipper cloth belt.
Example 3
A special interlayer process for a thin film material comprises the following steps:
(1) coating polyurethane polyacrylate UV coating on the surface of a workpiece to be processed, and performing UV semi-curing to form a semi-cured adhesive layer;
(2) paving a plurality of TPU colored thin films on the surface of the semi-solidified glue layer;
(3) coating polyurethane polyacrylate UV coating on the semi-cured glue layer paved with the TPU colored film, and performing UV full curing to form a special interlayer;
the polyurethane polyacrylate UV coating comprises the following raw materials in parts by weight:
50 parts of polyurethane prepolymer
Acrylic acid monomer 20 parts
1.5 parts of a photoinitiator;
the preparation method of the polyurethane prepolymer comprises the following steps: mixing 30 parts by weight of isocyanate, 12.5 parts by weight of hydroxyethyl acrylate, 0.075 part by weight of catalyst and 0.02 part by weight of polymerization inhibitor, heating to 80 ℃, carrying out heat preservation reaction for 2.5 hours, adding 50 parts by weight of polyether polyol, and carrying out heat preservation reaction for 2.5 hours to obtain the polyurethane prepolymer;
the TPU colored film comprises the following raw materials in parts by weight:
the preparation method of the hydroxyl polyacrylate comprises the following steps: mixing 15 parts by weight of hydroxyethyl acrylate, 20 parts by weight of methyl methacrylate, 4 parts by weight of acrylic acid, 14 parts by weight of trimethylolpropane triacrylate, 0.15 part by weight of ammonium persulfate and 90 parts by weight of deionized water, heating to 60 ℃, reacting for 1.5h, filtering, drying and washing to obtain the hydroxyl polyacrylate.
In the preparation method of the polyurethane prepolymer, the isocyanate is isophorone diisocyanate, the catalyst is an organic tin catalyst, and the polymerization inhibitor is a mixture of hydroquinone and p-methoxyphenol in a weight ratio of 1: 1.
The acrylic monomer is composed of ethoxy ethyl acrylate, trimethylolpropane triacrylate and isobornyl acrylate according to the weight ratio of 1.5:2: 1.
Wherein the photoinitiator consists of a photoinitiator 184 and a photoinitiator TPO according to the weight ratio of 1: 1.
In the TPU colored film, the isocyanate is diphenylmethane diisocyanate, the polyester polyol is polycaprolactone diol, the chain extender is a mixture of 1, 4-butanediol and 1, 6-hexanediol according to a weight ratio of 1:1, and the catalyst is an organic tin catalyst.
Wherein the polyester polyol has a weight average molecular weight of 1800.
The preparation method of the TPU colored film comprises the following steps: weighing polyester polyol, hydroxyl polyacrylate, a chain extender, a pigment and a catalyst according to the formula ratio, and heating to 100 ℃ to obtain a premix; weighing isocyanate, heating to 60 ℃, adding the isocyanate into the premix, mixing, carrying out tape casting film forming, and cutting and forming to obtain the TPU colored film.
The TPU colored film is cuboid, 5mm in length, 2mm in width and 150 microns in thickness.
Wherein the irradiation intensity of the UV semi-curing is 250mJ/cm2For 5 s; the irradiation intensity of the UV full-curing is 450mJ/cm2And the time is 8 s.
Wherein, the piece to be processed is a zipper cloth belt.
Comparative example 1
This comparative example differs from example 3 in that:
the preparation method of the hydroxyl polyacrylate comprises the following steps: and mixing 28 parts by weight of hydroxyethyl acrylate, 33 parts by weight of methyl methacrylate, 6 parts by weight of acrylic acid, 0.2 part by weight of ammonium persulfate and 100 parts by weight of deionized water, heating to 70 ℃ for reaction for 2 hours, filtering, drying and washing to obtain the hydroxyl polyacrylate.
Comparative example 2
This comparative example differs from example 3 in that:
the TPU colored film comprises the following raw materials in parts by weight:
comparative example 3
This comparative example differs from example 3 in that:
the acrylic monomer consists of ethoxy ethyl acrylate and isobornyl acrylate in a weight ratio of 3: 2.
The zipper cloth tapes of example 3 and comparative examples 1 to 3 were bent at an angle of-150 ° - +150 ° to the same point (with the TPU colored film), and the bending was repeated 4000 times to observe the results. The phenomenon of whitening appears near the TPU colored films of the comparative examples 1-3, wherein the whitening position of the comparative examples 1 and 3 mainly appears at the junction of the TPU colored film and the adhesive layer, and the TPU colored film does not have obvious whitening; comparative example 2 obvious whitening occurs in the TPU colored film and the interface between the TPU colored film and the adhesive layer. Therefore, firstly, the toughness of the TPU colored film can be obviously improved by an interpenetrating network structure formed by adding the hydroxyl polyacrylate, and the trimethylolpropane triacrylate is added into both the TPU colored film and the adhesive layer to promote the TPU colored film and the adhesive layer to form a network cross-linking structure, so that the interface performance is improved, and the TPU colored film and the adhesive layer have better bending resistance.
The above-described embodiments are preferred implementations of the present invention, and the present invention may be implemented in other ways without departing from the spirit of the present invention.
Claims (10)
1. A special interlayer process for a film material is characterized in that: the method comprises the following steps:
(1) coating polyurethane polyacrylate UV coating on the surface of a workpiece to be processed, and performing UV semi-curing to form a semi-cured adhesive layer;
(2) paving a plurality of TPU colored thin films on the surface of the semi-solidified glue layer;
(3) coating polyurethane polyacrylate UV coating on the semi-cured glue layer paved with the TPU colored film, and performing UV full curing to form a special interlayer;
the polyurethane polyacrylate UV coating comprises the following raw materials in parts by weight:
40-60 parts of polyurethane prepolymer
15-25 parts of acrylic monomer
1-2 parts of a photoinitiator;
the preparation method of the polyurethane prepolymer comprises the following steps: mixing 25-35 parts by weight of isocyanate, 10-15 parts by weight of hydroxyethyl acrylate, 0.05-0.1 part by weight of catalyst and 0.01-0.03 part by weight of polymerization inhibitor, heating to 70-90 ℃, carrying out heat preservation reaction for 2-3h, adding 40-60 parts by weight of polyether polyol, and carrying out heat preservation reaction for 2-3h to obtain the polyurethane prepolymer;
the TPU colored film comprises the following raw materials in parts by weight:
the preparation method of the hydroxyl polyacrylate comprises the following steps: mixing 10-20 parts by weight of hydroxyethyl acrylate, 15-25 parts by weight of methyl methacrylate, 2-6 parts by weight of acrylic acid, 12-16 parts by weight of trimethylolpropane triacrylate, 0.1-0.2 part by weight of ammonium persulfate and 80-100 parts by weight of deionized water, heating to 50-70 ℃, reacting for 1-2h, filtering, drying and washing to obtain the hydroxyl polyacrylate.
2. A special interlayer process of film material according to claim 1, characterized by: in the preparation method of the polyurethane prepolymer, the isocyanate is isophorone diisocyanate, the catalyst is an organic tin catalyst, and the polymerization inhibitor is hydroquinone and/or p-methoxyphenol.
3. A special interlayer process of film material according to claim 1, characterized by: the acrylic monomer consists of ethoxy ethyl acrylate, trimethylolpropane triacrylate and isobornyl acrylate in the weight ratio of 1-2:1-3: 1.
4. A special interlayer process of film material according to claim 1, characterized by: the photoinitiator consists of photoinitiator 184 and photoinitiator TPO in a weight ratio of 1: 1.
5. A special interlayer process of film material according to claim 1, characterized by: in the TPU colored film, the isocyanate is diphenylmethane diisocyanate, the polyester polyol is polycaprolactone diol, the chain extender is 1, 4-butanediol and/or 1, 6-hexanediol, and the catalyst is an organic tin catalyst.
6. A process according to claim 5, characterized in that: the weight average molecular weight of the polyester polyol is 1500-2000.
7. A special interlayer process of film material according to claim 1, characterized by: the preparation method of the TPU colored film comprises the following steps: weighing polyester polyol, hydroxyl polyacrylate, a chain extender, a pigment and a catalyst according to the formula ratio, and heating to 90-110 ℃ to obtain a premix; weighing isocyanate, heating to 50-70 ℃, adding the isocyanate into the premix, mixing, carrying out tape casting film forming, and cutting and forming to obtain the TPU colored film.
8. A process according to claim 7, characterized in that: the TPU colored film is cuboid, the length is 4-6mm, the width is 1-3mm, and the thickness is 100-200 mu m.
9. A special interlayer process of film material according to claim 1, characterized by: the irradiation intensity of the UV semi-curing is 200-300mJ/cm2The time is 4-6 s; the irradiation intensity of the UV full-curing is 400-500mJ/cm2The time is 6-10 s.
10. A special interlayer process of film material according to claim 1, characterized by: the workpiece to be machined is a zipper cloth belt, a vamp or a dress.
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| CN101423941A (en) * | 2008-06-06 | 2009-05-06 | 东莞劲胜精密组件股份有限公司 | Vacuum coating surface color spraying technology |
| JP2010275373A (en) * | 2009-05-26 | 2010-12-09 | Toagosei Co Ltd | Active energy ray-curable type composition for optical film or sheet and active energy ray-curable type adhesive film or sheet |
| CN102178132A (en) * | 2011-04-18 | 2011-09-14 | 张炳华 | Semi-transparent colloidal food with auspicious characters or patterns and preparation method thereof |
| CN108977093A (en) * | 2014-05-09 | 2018-12-11 | 深圳光启创新技术有限公司 | The method and flexibility absorbing material of micro-structure interlayer are added between silicone rubber matrix |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101423941A (en) * | 2008-06-06 | 2009-05-06 | 东莞劲胜精密组件股份有限公司 | Vacuum coating surface color spraying technology |
| JP2010275373A (en) * | 2009-05-26 | 2010-12-09 | Toagosei Co Ltd | Active energy ray-curable type composition for optical film or sheet and active energy ray-curable type adhesive film or sheet |
| CN102178132A (en) * | 2011-04-18 | 2011-09-14 | 张炳华 | Semi-transparent colloidal food with auspicious characters or patterns and preparation method thereof |
| CN108977093A (en) * | 2014-05-09 | 2018-12-11 | 深圳光启创新技术有限公司 | The method and flexibility absorbing material of micro-structure interlayer are added between silicone rubber matrix |
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