WO2021238969A1 - 用于 pet 膜的涂层组合物、 pet 转印膜及其制备方法和应用 - Google Patents

用于 pet 膜的涂层组合物、 pet 转印膜及其制备方法和应用 Download PDF

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WO2021238969A1
WO2021238969A1 PCT/CN2021/095987 CN2021095987W WO2021238969A1 WO 2021238969 A1 WO2021238969 A1 WO 2021238969A1 CN 2021095987 W CN2021095987 W CN 2021095987W WO 2021238969 A1 WO2021238969 A1 WO 2021238969A1
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coating composition
pet
transfer film
parts
film
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PCT/CN2021/095987
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English (en)
French (fr)
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刘德祥
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珠海天威新材料股份有限公司
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Publication of WO2021238969A1 publication Critical patent/WO2021238969A1/zh

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    • 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
    • C09D129/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Coating compositions based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Coating compositions based on derivatives of such polymers
    • C09D129/14—Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols
    • 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
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/0427—Coating with only one layer of a composition containing a polymer binder
    • 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
    • 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/65—Additives macromolecular
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
    • D06P3/58—Material containing hydroxyl groups
    • D06P3/60—Natural or regenerated cellulose
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
    • D06P3/82—Textiles which contain different kinds of fibres
    • D06P3/8204—Textiles which contain different kinds of fibres fibres of different chemical nature
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
    • D06P5/003—Transfer printing
    • 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
    • C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • 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
    • C08J2429/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
    • C08J2429/02—Homopolymers or copolymers of unsaturated alcohols
    • C08J2429/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
    • 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
    • C08J2429/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
    • C08J2429/14—Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols
    • 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
    • C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2475/04—Polyurethanes
    • C08J2475/08—Polyurethanes from polyethers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend

Definitions

  • the present invention is based on the Chinese patent with the patent number 202010470172.0 and the name "Coating composition for PET film, PET transfer film and its preparation method and application".
  • the present invention relates to the field of inkjet printing, especially a kind of Coating composition for PET film, PET transfer film, and preparation method and application thereof.
  • Heat transfer refers to printing a pattern on a PET film coated with a release agent. After drying, the patterned film is heated to the surface of the clothing fabric through high temperature and high pressure, and the waste film is torn off, and the pattern can be transferred. Printed on the surface of the garment fabric.
  • the heat transfer transfer process currently on the market is the traditional silk screen transfer process plus engraving technology. The process is complicated and cannot meet the requirements of small batch and individualized production.
  • the water-based pigment ink has good color performance and has the advantage of environmental protection.
  • the printing effect of water-based pigment ink on PET film coated with release agent is not ideal.
  • the ink droplets When the amount of ink is small, the ink droplets appear on the film as water droplets, causing the phenomenon of ink accumulation; when the amount of ink is large , Ink droplets are easy to permeate on the film, and the fineness of the printed pattern is low.
  • the first object of the present invention is to provide a coating composition that improves the ink absorption capacity of the PET film.
  • the second object of the present invention is to provide a PET transfer film with improved ink absorption capability.
  • the third object of the present invention is to provide a method for preparing a PET transfer film.
  • the fourth object of the present invention is to provide an application of PET transfer film.
  • the coating composition for PET film provided by the present invention is based on a total weight of 100 parts, and includes the following components in a weight ratio: 10 parts to 30 parts of polyvinyl butyral ester, 5-10 parts of water-based polyurethane, 5-10 parts of polyvinyl alcohol and 0.5-1 part of coupling agent, the balance being water.
  • the waterborne polyurethane is a modified waterborne aliphatic polyether polyurethane, and the waterborne aliphatic polyether polyurethane contains a self-crosslinking group or the terminal group of the waterborne aliphatic polyether polyurethane can be hydroxyl, carboxyl, carboxymethyl or Aldehyde group.
  • polyvinyl alcohol is acetyl vinyl polyvinyl alcohol.
  • a further solution is that the coupling agent is a silane coupling agent.
  • a further solution is that the ratio of polyvinyl alcohol to coupling agent is 10:1.
  • the coating composition further includes one or more of calcium stearate emulsion, ultrafine aluminum silicate, and polyether-siloxane copolymer.
  • the PET transfer film provided by the present invention is coated with the above-mentioned coating composition.
  • the method for preparing a PET transfer film includes the steps of preparing a coating composition and coating sequentially, wherein the PET transfer film is the above-mentioned PET transfer film, and the coating
  • the preparation steps of the composition include:
  • the coating step is: uniformly coating the coating composition obtained in the coating composition preparation step on the PET film, and drying at 80°C to 170°C.
  • the PET transfer film is the above-mentioned PET transfer film, and the PET transfer film is applied to the printing process of pure cotton or cotton blended fabric.
  • Polyvinyl butyral ester has the effect of absorbing ink. Both polyvinyl butyral ester and the resin in the ink are polar molecules, and their molecular structures are similar. According to the similar compatibility, polyvinyl butyral ester and ink have Compatibility, and the polyvinyl butyral itself is a network structure, the gaps in the holes of the polyvinyl butyral can lock the ink, and after the coating composition is applied to the PET film, the PET conversion can be improved.
  • Cross-linking slows down the diffusion of ink to the inner layer of the coating and prevents the ink from being mixed into the coating longitudinally, which can further increase the transfer rate of the transfer film and increase the image resolution; while the water-based polyurethane can react by itself to form a network structure after coating.
  • the ink is locked in the network structure, so that the water resistance, corrosion resistance and mechanical strength of the coating film are greatly improved.
  • the water-based aliphatic polyether polyurethane contains self-crosslinking groups, which can make the water-based polyurethane itself react to form a network structure and improve the ink absorption capacity of the PET film.
  • the water-based aliphatic polyether polyurethane contains hydroxyl and carboxyl groups Active groups such as carboxymethyl or aldehyde groups can react with the waterborne polyurethane's own groups under heating to form a network structure, thereby improving the ink absorption capacity of the PET film.
  • the PET transfer film is coated with a coating composition.
  • the coating composition has good ink absorption ability, which allows the ink to penetrate in the depth direction on the PET transfer film, and can prevent patterns in the PET transfer film printing process. Bleeding occurs around, and it will not be miscible before the ink dries, so as to avoid affecting the printing fineness of the ink, and it exhibits higher resolution when transferring and restoring images.
  • the coating composition After the coating composition is uniformly coated on the PET film, the coating composition can be heated to facilitate the reaction of the coating composition on the film, improve the ink absorption capacity of the coating composition, and fix the coating composition on the film.
  • the PET transfer film is transferred to pure cotton or cotton blended fabric. After transfer, it does not re-stick, and has little effect on the fabric's sense of use.
  • the pattern does not fade or crack, and it can be used for printing with color ink and white ink at the same time.
  • the effect is that it can also display colorful printing effects on dark fabrics, while meeting the color fastness test requirements of the textile printing industry.
  • Figure 1 is a list of the components and their contents in three embodiments of the PET transfer film of the present invention.
  • Figure 2 is a comparison table of the performance test results of three examples of the PET transfer film of the present invention.
  • the coating composition of the present invention includes 10 parts to 30 parts of polyvinyl butyral ester, 5 parts to 10 parts of water-based polyurethane, 5 parts to 10 parts of polyvinyl alcohol, and 0.5 parts of polyvinyl butyral ester.
  • the water-based polyurethane is modified water-based aliphatic polyether polyurethane
  • the polyvinyl alcohol is acetyl vinyl polyvinyl alcohol
  • the coupling agent is a silane coupling agent
  • polyvinyl alcohol The ratio of the coupling agent to the coupling agent is 10:1
  • the coating composition also includes one or two or more auxiliary agents among calcium stearate emulsion, ultrafine aluminum silicate and polyether-siloxane copolymer, In this way, the ink is locked in the network structure, and the transfer rate of the saturated ink absorption high transfer film that the PET transfer film can bear is increased, and the image resolution and the water resistance, corrosion resistance and mechanical strength of the coating film are improved at the same time , Improve the performance of the coating composition.
  • the above coating composition is coated on the PET transfer film, so that the PET transfer film can be used in the printing process of pure cotton or cotton blended fabric to prevent bleeding around the pattern, and it will not be mixed before the ink is dried.
  • the PET transfer film can be used in the printing process of pure cotton or cotton blended fabric to prevent bleeding around the pattern, and it will not be mixed before the ink is dried.
  • it exhibits higher resolution when transferring and restoring the image, and does not re-stick after transfer, has little effect on the feeling of use of the fabric, the pattern does not fade, does not crack, and can adapt to color
  • the effect of printing with ink and white ink at the same time can also show colorful printing effects on dark fabrics, while meeting the color fastness test requirements of the textile printing industry.
  • each component in the coating composition is the percentage of the component in the total weight of the coating composition, wherein the total weight of each component of the coating composition The weight is based on 100 parts.
  • the coating composition in each embodiment is used to prepare a PET transfer film, wherein the preparation method of the PET transfer film in each embodiment is the same.
  • the preparation of the PET transfer film is followed by the coating composition preparation step and the coating step in sequence;
  • the coating composition preparation step includes:
  • the coating step is: uniformly coating the coating composition obtained in the coating composition preparation step on the PET film, and drying at 170° C. to obtain the PET transfer film.
  • the printing media are the PET transfer film prepared in the above-mentioned Example 1, Example 2 and Example 3 and the commercially available PET film in Comparative Example 1, according to a single color block , 100% inkjet setting for inkjet printing. Then, the thermal transfer printing process was performed on the pure cotton fabric at 170°C, and the printing effect and the transfer effect of the ink were compared by the following test.
  • Test item 1 Fineness
  • Test item 2 transfer effect
  • Test item 3 Color fastness to washing
  • Test item 4 Color fastness to rubbing
  • the experimental results of the above-mentioned test items are as follows: the ink printed patterns on the PET transfer films prepared in Example 1, Example 2 and Example 3, and the imprint boundary was clear and non-bleeding, and the fineness was high.
  • the ink will bleed and cannot form a regular shape, and the transfer process cannot be performed; the ink is on the PET transfer film prepared in Example 1, Example 2 and Example 3.
  • the washing fastness of the transferred fabric can reach Grade 4 to Grade 5, and the color fastness to dry rubbing can reach Grade 4 to Grade 5.
  • the rubbing fastness reaches grade 4 to grade 5, which meets the color fastness test requirements of the textile printing industry; therefore, the PET film is used to lock the ink to avoid bleeding, and improve the washing fastness and rubbing resistance of the fabric after transfer performance.
  • the present invention is used in applications where the PET transfer film is used for the thermal transfer process.
  • the present invention applies a coating composition for locking the ink on the PET transfer film, and the polyvinyl alcohol in the coating composition
  • Polyvinyl butyral ester has the effect of absorbing ink.
  • Polyvinyl butyral ester and the resin in the ink are both polar molecules, and their molecular structures are similar. According to the similar compatibility, polyvinyl butyral ester is compatible with the ink. And the polyvinyl butyral ester itself has a network structure. The gaps in the holes of the polyvinyl butyral ester can lock the ink.
  • the PET transfer film can be improved.
  • Both the polyvinyl alcohol and the coupling agent are slowly cross-linked in the coating. It slows down the diffusion of ink to the inner layer of the coating and prevents the ink from being mixed into the coating longitudinally, which can further increase the transfer rate of the transfer film and increase the image resolution; while the water-based polyurethane can react by itself to form a network structure after the film is coated to lock the ink Tightly within the network structure, it can prevent bleeding around the pattern in the PET transfer film printing process, and it will not be miscible before the ink dries, avoiding affecting the printing fineness of the ink, and the performance is higher when transferring and restoring the image.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Textile Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Health & Medical Sciences (AREA)
  • Decoration By Transfer Pictures (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)

Abstract

本发明涉及喷墨打印领域，并本发明提供一种用于PET膜的涂层组合物、PET转印膜及其制备方法和应用，该涂层组合物按总重量为100份计包括以下重量比组分：10份～30份的聚乙烯醇缩丁醛酯、5份～10份的水性聚氨酯、5份～10份聚乙烯醇和0.5份～1份的偶联剂和余量的水，将该涂层组合物涂布在PET膜上，该PET膜应用于纯棉或棉混纺织物的印花工艺，涂层组合物中的聚乙烯醇缩丁醛酯是网状结构，具有吸墨作用，聚乙烯醇和偶联剂两者在涂层中缓慢交联，减缓墨水往涂层内层扩散，阻止墨水纵向混入涂层中，水性聚氨酯通过自身反应，涂膜后形成网络结构，将墨水锁紧在网络结构内，涂层组合物应用在PET膜上后，可提高PET转印膜所能承载的饱和吸墨量。

Description

用于PET膜的涂层组合物、PET转印膜及其制备方法和应用 技术领域
本发明基于专利号为202010470172.0、名称为“用于PET膜的涂层组合物、PET转印膜及其制备方法和应用”的中国专利，本发明涉及喷墨打印领域，尤其是涉及一种用于PET膜的涂层组合物、PET转印膜及其制备方法和应用。
 背景技术
“烫画”是指把图案印刷到涂有离型剂的PET膜上，干燥后，用这种带有图案的膜通过高温高压烫到服装面料的表面，撕离废膜，图案就可以转印到服装面料表面。目前市场上的烫画转印工艺为传统丝印转移工艺外加雕刻技术，其工序复杂，无法满足小批量及个性化的生产。为简化工序，开始使用水性颜料墨水喷墨打印完成烫画转印工艺，水性颜料墨水色彩表现性好，具有环保的优势。但是水性颜料墨水在一般涂有离型剂的PET膜上的打印效果不理想，当墨量较少时，墨滴在膜上呈水珠状，出现聚墨的现象；当墨量较大时，墨滴在膜上很容易渗化，打印图案的精细度低。
 技术问题
本发明的第一目的是提供一种提高PET膜吸墨能力的涂层组合物。
本发明的第二目的是提供一种提高吸墨能力的PET转印膜。
本发明的第三目的是提供一种PET转印膜的制备方法。
本发明的第四目的是提供一种PET转印膜的应用。
 技术解决方案
为了实现上述的第一目的，本发明提供的用于PET膜的涂层组合物按总重量为100份计，包括以下重量比组分：10份～30份的聚乙烯醇缩丁醛酯、5份～10份的水性聚氨酯、5份～10份聚乙烯醇和0.5份～1份的偶联剂，余量为水。
进一步的方案是，水性聚氨酯为改性水性脂肪族聚醚聚氨酯，水性脂肪族聚醚聚氨酯上含有自交联基团或水性脂肪族聚醚聚氨酯的端基可为羟基、羧基、羧甲基或醛基。
进一步的方案是，聚乙烯醇为乙酰乙烯基聚乙烯醇。
进一步的方案是，偶联剂为硅烷偶联剂。
进一步的方案是，聚乙烯醇与偶联剂的比值为10:1。
进一步方案是，涂层组合物还包括硬脂酸钙乳液、超细硅酸铝和聚醚-硅氧烷共聚物中的一种或两种以上。
为实现本发明的第二目的，本发明提供的PET转印膜上涂布有上述的涂层组合物。
为实现本发明的第三目的，本发明提供的PET转印膜的制备方法，包括依次进行涂层组合物制备步骤和涂布步骤，其中PET转印膜为上述的PET转印膜，涂层组合物制备步骤包括：
1）将聚乙烯醇缩丁醛酯和聚乙烯醇按比例混合，并搅拌；
2）在不断搅拌的过程中，往1）的混合溶液加入水性聚氨酯和偶联剂；
3）往2）中的混合溶液加入水，搅拌均匀后过滤，得到涂层组合物。
涂布步骤为：将涂层组合物制备步骤得到的涂层组合物均匀地涂布在PET膜上，在80℃～170℃烘干。
为实现本发明的第四目的，本发明提供的 PET转印膜的应用， PET转印膜如上述的PET转印膜， PET转印膜应用于纯棉或棉混纺织物的印花工艺。
 有益效果
聚乙烯醇缩丁醛酯具有吸墨作用，聚乙烯醇缩丁醛酯与墨水中的树脂均属于极性分子，并且分子结构相似，根据相似相溶，聚乙烯醇缩丁醛酯与墨水具有相容性，并且聚乙烯醇缩丁醛酯自身是网状结构，聚乙烯醇缩丁醛酯的孔内缝隙能够锁住墨水，将涂层组合物应用在PET膜上后，可提高PET转印膜所能承载的饱和吸墨量，并使得墨水停留在涂层表层或内表层而不往四周流动，使得干燥后墨水无扩散的现象，聚乙烯醇和偶联剂两者在涂层中缓慢交联，减缓墨水往涂层内层扩散，阻止墨水纵向混入涂层中，进一步能够提高转印膜的转移率，提高图像分辨率；而水性聚氨酯可通过自身反应，涂膜后形成网络结构，将墨水锁紧在网络结构内，从而使涂膜的耐水性、耐腐蚀性及机械强度到了极大提高。
其中，水性脂肪族聚醚聚氨酯上含有自交联基团，可使水性聚氨酯自身基团发生反应，形成网络结构，提高PET膜的吸墨能力，当水性脂肪族聚醚聚氨酯上含有羟基、羧基、羧甲基或醛基等活性基团，在加热的条件下可使水性聚氨酯自身基团发生反应，形成网络结构，从而提高PET膜的吸墨能力。
PET转印膜上涂布有涂层组合物，该涂层组合物具有很好的吸墨能力，使得墨水在PET转印膜上沿深度方向渗透，在PET转印膜印花工艺中可防止花纹四周出现渗化，而且在墨水干化前不会混溶，避免影响墨水的打印精细度，转印还原图像时表现较高的分辨率。
将涂层组合物均匀地涂布在PET膜上后，通过加热便于涂层组合物在膜上发生反应，提高涂层组合物的吸墨能力,并将涂层组合物固定在膜上。
通过该PET转印膜转印在纯棉或棉混纺织物上，转印后不返粘，对织物的使用感影响较小，图案不掉色，不裂纹，并且能适应彩墨和白墨同时打印的效果，在深色织物上也能显示出色彩丰富的打印效果的同时，满足纺织品印花行业的色牢度测试要求。
 附图说明
图1是本发明PET转印膜三个实施例中各组分及其含量的列表。
图2是本发明PET转印膜三个实施例性能测试结果对比表。
 本发明的最佳实施方式
本发明的涂层组合物按总重量为100份计，包括10份～30份的聚乙烯醇缩丁醛酯、5份～10份的水性聚氨酯、5份～10份聚乙烯醇、0.5份～1份的偶联剂和余量的水，优选地水性聚氨酯为改性水性脂肪族聚醚聚氨酯，聚乙烯醇为乙酰乙烯基聚乙烯醇，偶联剂为硅烷偶联剂，聚乙烯醇与偶联剂的比值为10:1，并且涂层组合物还包括硬脂酸钙乳液、超细硅酸铝和聚醚-硅氧烷共聚物中的一种或两种以上的辅助剂，从而将墨水锁紧在网络结构内，提高PET转印膜所能承载的饱和吸墨量高转印膜的转移率，提高图像分辨率和涂膜的耐水性、耐腐蚀性及机械强度的同时，提高涂层组合物各性能。
将以上的涂层组合物涂布在PET转印膜上，使得PET转印膜应用在纯棉或棉混纺织物的印花工艺中可防止花纹四周出现渗化，而且在墨水干化前不会混溶，避免影响墨水的打印精细度，转印还原图像时表现较高的分辨率，并且转印后不返粘，对织物的使用感影响较小，图案不掉色，不裂纹，并且能适应彩墨和白墨同时打印的效果，在深色织物上也能显示出色彩丰富的打印效果的同时，满足纺织品印花行业的色牢度测试要求。
下面通过具体实施例来进一步说明本发明的技术方案，更好地理解本发明。
按图1所示的比例组成各实施例的涂层组合物，其中涂层组合物中的各成分均是该成分占涂层组合物的总重量的百分比，其中涂层组合物各成分的总重量按100份计。
使用各实施例中的涂层组合物制备PET转印膜，其中各实施例中制备PET转印膜的制备方法相同。
PET转印膜的制备依次进行涂层组合物制备步骤和涂布步骤；涂层组合物制备步骤包括：
1）将聚乙烯醇缩丁醛酯和聚乙烯醇按比例混合，并搅拌；
2）在不断搅拌的过程中，按比例往1）的混合溶液加入水性聚氨酯和偶联剂；
3）往2）中的混合溶液加入水，搅拌均匀后用200目滤网进行过滤，得到涂层组合物。
涂布步骤为：将涂层组合物制备步骤得到的涂层组合物均匀地涂布在PET膜上，在170℃烘干，即可得到PET转印膜。
PET转印膜的性能测试
取墨水500mL，在EPSON -T3280喷墨打印机上进行打印，打印介质分别为上述实施例1、实施例2和实施例3制备的PET转印膜以及对比例1市售PET膜，按照单一色块，100%喷墨设置进行喷墨打印。然后在170℃下在纯棉织物上进行热转印印花工艺，就墨水的打印效果与转印效果通过以下测试进行对比。
测试项目1：精细度
取上述各实施例完成喷墨打印的PET转印膜，利用手持放大镜观测印迹渗化情况。若印迹边界清晰无渗化，表示水性颜料墨水在PET膜上的打印精细度较高，若印迹边界有齿锯，表示水性颜料墨水在PET膜上的打印精细度较低，测试结果见下表2。
测试项目2：转印效果
取上述各实施例完成转印的PET转印膜，观察PET膜上墨水的残留情况。若PET转印膜上墨水的印迹较少，表示转印效果较好，若PET转印膜上墨水的印迹较多，表示转印效果较差，测试结果见下表2。
测试项目3：耐水洗色牢度测试
取上述各实施例完成转印的印花织物，根据GB/T 5713-2013进行耐水洗色牢度测试，利用变色用灰色样卡，依靠原样和试样褪色后的色差来进行评判，评定试样的变色级数，共分5个等级，数值越大，表示耐水洗色牢度越好，测试结果见下表2。
测试项目4：耐摩擦色牢度
取上述各实施例完成转印的印花织物，根据GB/T 3920-2008进行耐干/湿摩擦色牢度测试，以白布沾色程度作为评价原则，共分5级，数值越大，表示耐摩擦牢度越好，测试结果见图2。
上述各项测试项目的实验结果如下：墨水在实施例1、实施例2和实施例3制备的PET转印膜上打印图案，印迹边界清晰无渗化，精细度较高。而在对比例1的市售普通PET膜上墨水会发生渗化，无法形成规整的形状，无法进行转印工艺；墨水在实施例1、实施例2和实施例3制备的PET转印膜上进行热转印后，PET膜上无明显残留印迹，转印效果好，转印后的织物的耐水洗牢度达到4级～5级，耐干摩擦色牢度达到4级～5级，耐湿摩擦牢度达到4级～5级，满足纺织品印花行业的色牢度测试要求；因此使用该PET膜对墨水进行锁水，避免渗化现象，提高转印后织物的耐水洗牢度和耐摩擦性能。
最后需要强调的是，本发明不限于上述实施方式，如各组分含量的改变等变化也应该包括在本发明权利要求的保护范围内。
 工业实用性
本发明用于使用PET转印膜进行热转印工艺的应用场合，本发明通过将用于锁紧墨水的涂层组合物涂布在PET转印膜上，涂层组合物中的聚乙烯醇缩丁醛酯具有吸墨作用，聚乙烯醇缩丁醛酯与墨水中的树脂均属于极性分子，并且分子结构相似，根据相似相溶，聚乙烯醇缩丁醛酯与墨水具有相容性，并且聚乙烯醇缩丁醛酯自身是网状结构，聚乙烯醇缩丁醛酯的孔内缝隙能够锁住墨水，将涂层组合物应用在PET膜上后，可提高PET转印膜所能承载的饱和吸墨量，并使得墨水停留在涂层表层或内表层而不往四周流动，使得干燥后墨水无扩散的现象，聚乙烯醇和偶联剂两者在涂层中缓慢交联，减缓墨水往涂层内层扩散，阻止墨水纵向混入涂层中，进一步能够提高转印膜的转移率，提高图像分辨率；而水性聚氨酯可通过自身反应，涂膜后形成网络结构，将墨水锁紧在网络结构内，使得在PET转印膜印花工艺中可防止花纹四周出现渗化，而且在墨水干化前不会混溶，避免影响墨水的打印精细度，转印还原图像时表现较高的分辨率；当通过该PET转印膜转印在纯棉或棉混纺织物上，转印后不返粘，对织物的使用感影响较小，图案不掉色，不裂纹，并且能适应彩墨和白墨同时打印的效果，在深色织物上也能显示出色彩丰富的打印效果的同时，满足纺织品印花行业的色牢度测试要求。
 

Claims (9)

  1. 用于PET膜的涂层组合物，其特征在于：按总重量为100份计，包括以下重量比组分：10份～30份的聚乙烯醇缩丁醛酯、5份～10份的水性聚氨酯、5份～10份聚乙烯醇、0.5份～1份的偶联剂和余量为水。
  2. 根据权利要求1所述的用于PET膜的涂层组合物，其特征在于：
    所述水性聚氨酯为改性水性脂肪族聚醚聚氨酯，所述水性脂肪族聚醚聚氨酯上含有自交联基团或所述水性脂肪族聚醚聚氨酯的端基可为羟基、羧基、羧甲基或醛基。
  3. 根据权利要求1所述的用于PET膜的涂层组合物，其特征在于：
    所述聚乙烯醇为乙酰乙烯基聚乙烯醇。
  4. 根据权利要求4所述的用于PET膜的涂层组合物，其特征在于：
    所述偶联剂为硅烷偶联剂。
  5. 根据权利要求1所述的用于PET膜的涂层组合物，其特征在于：
    所述聚乙烯醇与所述偶联剂的比值为10:1。
  6. 根据权利要求1至5任一项所述的用于PET膜的涂层组合物，其特征在于：
    所述涂层组合物还包括硬脂酸钙乳液、超细硅酸铝和聚醚-硅氧烷共聚物中的一种或两种以上。
  7. PET转印膜，其特征在于：所述PET转印膜上涂布有如权利要求1至6任一项所述的涂层组合物。
  8. PET转印膜的制备方法，其特征在于：所述PET转印膜为权利要求7所述的PET转印膜，所述制备方法包括依次进行涂层组合物制备步骤和涂布步骤；
    所述涂层组合物制备步骤包括：
    1）将所述聚乙烯醇缩丁醛酯和所述聚乙烯醇按比例混合，并搅拌；
    2）在不断搅拌的过程中，往1）的混合溶液加入所述水性聚氨酯和所述偶联剂；
    3）往2）中的混合溶液加入水，搅拌均匀后过滤，得到涂层组合物；
    所述涂布步骤为：将所述涂层组合物制备步骤得到的所述涂层组合物均匀地涂布在PET膜上，在80℃～170℃烘干。
  9. PET转印膜的应用，其特征在于：所述PET转印膜如权利要求7所述的PET转印膜，所述PET转印膜应用于纯棉或棉混纺织物的印花工艺。
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