阅读说明：本技术 一种低吸高效转移印花纸的制备方法 (Preparation method of low-absorption high-efficiency transfer printing paper ) 是由 吕亮 许在亮 侯发财 许燕飞 徐岩 于 2020-07-24 设计创作，主要内容包括：本发明提供了一种低吸高效转移印花纸的制备方法。该技术方案对原纸的纸浆成分加以改进,并采用了全新的制造工艺。本发明首先将苎麻打浆至25°SR,而后在85℃、1.5个大气压下熟化30min,再蒸干得到熟化苎麻浆；将其与针叶木浆按特定量混合后,加碳酸钙填料,进除渣器除渣,再进除气罐脱气,最后送入流浆箱上网,压榨,烘干,得到具有良好疏水性的原纸。在此基础上,以羧甲基纤维素钠、钛白粉、透明质酸钠、甲基丙烯酸二甲基氨基乙酯混配得到隔离层涂料,以汉生胶、二氧化硅、甲基丙烯酸甲酯、聚乙烯吡咯烷酮混配得到承印层涂料,经依次涂布得到成品。本发明使纸张吸水性得到显著降低,同时印花效果得到改善,具有突出的技术优势。(The invention provides a preparation method of low-absorption high-efficiency transfer printing paper. The technical proposal improves the pulp components of the base paper and adopts a brand new manufacturing process. Firstly, pulping ramie to 25 DEG SR, curing for 30min at 85 ℃ and 1.5 atmospheric pressure, and evaporating to dryness to obtain cured ramie pulp; mixing with softwood pulp according to a specific amount, adding calcium carbonate filler, deslagging in a deslagging device, degassing in a degassing tank, feeding into a head box, screening, squeezing and drying to obtain the base paper with good hydrophobicity. On the basis, the isolating layer coating is obtained by mixing sodium carboxymethylcellulose, titanium dioxide, sodium hyaluronate and dimethylaminoethyl methacrylate, the printing layer coating is obtained by mixing xanthan gum, silicon dioxide, methyl methacrylate and polyvinylpyrrolidone, and the finished product is obtained by coating in sequence. The invention obviously reduces the water absorption of paper, improves the printing effect and has outstanding technical advantages.)

1. A preparation method of low-absorption high-efficiency transfer printing paper is characterized by comprising the following steps:

1) mixing 24 parts by weight of ramie with 30 parts by weight of water, firstly crushing by using a hydrapulper, then pulping by using a double-disc mill to 25-degree SR, then curing for 30min at the temperature of 85 ℃ and under the condition of 1.5 atmospheric pressure, and then drying by distillation until the total amount of the mixture is 40 parts by weight, thereby obtaining cured ramie pulp;

2) taking 16 parts by weight of softwood pulp, crushing the softwood pulp by using a hydraulic pulper, pulping the softwood pulp by using a double-disc mill to reach 30-degree SR, adding the cured ramie pulp obtained in the step 1) into the softwood pulp, and uniformly mixing the cured ramie pulp to obtain mixed pulp;

3) adding 5 parts by weight of calcium carbonate filler into the mixed pulp, deslagging by a deslagging device, degassing by a degassing tank, feeding into a pulp flowing box for net surfing, and squeezing the wet paper leaves out of the net part and into a squeezing part until the dryness is not less than 45%; drying the paper sheet to dryness not less than 90% at the surface temperature of a drying cylinder of 75-105 ℃ under normal pressure, and drying the paper sheet to dryness not less than 95% at the surface temperature of the drying cylinder of 55-70 ℃ under 0.3 atmosphere to obtain base paper;

4) uniformly mixing sodium carboxymethylcellulose, titanium dioxide, sodium hyaluronate and dimethylaminoethyl methacrylate in a weight ratio of 5:2:3:1 to obtain an isolation layer coating; uniformly mixing xanthan gum, silicon dioxide, methyl methacrylate and polyvinylpyrrolidone in a weight ratio of 7:5:3:1.2 to obtain a printing layer coating;

5) 5.2g/m of the isolating layer coating obtained in the step 4)²Coating the coating weight of the adhesive on the surface of the base paper obtained in the step 3) to obtain an isolating layer; then the printing layer coating obtained in the step 4) is coated at the concentration of 1.5g/m²The coating amount of the low-absorption high-efficiency transfer printing paper is coated on the surface of the isolation layer, and the low-absorption high-efficiency transfer printing paper is obtained.

2. The method for preparing low-absorption high-efficiency transfer printing paper according to claim 1, wherein the paper weight in the step 3) is 45g/m²。

3. The preparation method of the low-absorption high-efficiency transfer printing paper as claimed in claim 1, characterized by further comprising the following step 6): and keeping the low-absorption high-efficiency transfer printing paper at the temperature of 52 ℃ for 8min, and then performing calendaring treatment at room temperature and under the pressure of 0.5-2 MPa.

4. The method for preparing low-absorption high-efficiency transfer printing paper as claimed in claim 1, wherein the isolating layer coating further comprises 0.8 part by weight of starch.

5. The method for preparing the transfer printing paper with low absorption and high efficiency as claimed in claim 1, wherein the print layer coating further comprises 1.8 parts by weight of tributyl phosphate.

6. The method for preparing the low-absorption high-efficiency transfer printing paper as claimed in claim 1, wherein the coating is realized by a sizing press, and the pressurizing pressure of the sizing press is as follows when the isolating layer coating is coated: the upper roller is 1-1.2 bar, and the lower roller is 1.2-1.5 bar.

7. The method for preparing low-absorption high-efficiency transfer printing paper according to claim 1, wherein the water absorption of the low-absorption high-efficiency transfer printing paper is less than 15g/m²。

Technical Field

The invention relates to the technical field of transfer printing paper, in particular to a preparation method of low-absorption high-efficiency transfer printing paper.

Background

The transfer printing is a printing method which prints dyes on other materials such as paper and transfers patterns to fabrics in a hot pressing mode and the like, and is mainly used for printing chemical fiber knitwear and clothing. The transfer printing paper is a functional paper which is specially used for printing patterns and transfers the patterns to printing stocks such as fabrics, porcelain, wood and the like by a heat treatment method.

Unlike conventional paper, transfer printed paper has specific requirements in terms of properties. Firstly, the paper surface should have enough surface strength to report that the paper surface does not drop fiber, powder or peel; during the printing and peeling process, the ink and the paper surface have certain tension, and the higher the speed, the higher the tension, so that the paper surface is required to have enough strength. Furthermore, to have some smoothness and tensile strength; the smoothness of the paper ensures that the printing colors are cohesive, the printing fine layers can be accurately reproduced, and the tensile strength of the paper ensures that the paper is not broken in the printing and transfer printing processes. In addition, the transfer printing paper has low affinity to the color ink, and the transfer printing paper is only an intermediate medium for transferring the pattern, so the low affinity can ensure that the pattern can be better transferred from the paper surface to the surface of a printed product, and the pattern cannot be influenced by excessive residue on the paper surface.

In recent years, transfer printing paper has made great progress in technical aspect, but because paper fiber has natural affinity with most color inks, the conventional transfer printing paper still has high adsorbability to color inks, which not only increases color ink consumption, but also influences paper strength and process stability in the transfer printing process. In addition, the conventional transfer printing paper needs to be improved in the aspect of transfer printing effect, the edge of a color area is easy to blur, and the color is not full enough.

Disclosure of Invention

The invention aims to overcome the technical defects of the prior art and provides a preparation method of low-absorption high-efficiency transfer printing paper so as to solve the technical problem that the absorption of the conventional transfer printing paper to color ink needs to be reduced in the prior art.

The invention also aims to solve the technical problem of how to further improve the transfer printing effect of the transfer printing paper.

In order to achieve the technical purpose, the invention adopts the following technical scheme:

a preparation method of low-absorption high-efficiency transfer printing paper comprises the following steps:

1) mixing 24 parts by weight of ramie with 30 parts by weight of water, firstly crushing by using a hydrapulper, then pulping by using a double-disc mill to 25-degree SR, then curing for 30min at the temperature of 85 ℃ and under the condition of 1.5 atmospheric pressure, and then drying by distillation until the total amount of the mixture is 40 parts by weight, thereby obtaining cured ramie pulp;

2) taking 16 parts by weight of softwood pulp, crushing the softwood pulp by using a hydraulic pulper, pulping the softwood pulp by using a double-disc mill to reach 30-degree SR, adding the cured ramie pulp obtained in the step 1) into the softwood pulp, and uniformly mixing the cured ramie pulp to obtain mixed pulp;

3) adding 5 parts by weight of calcium carbonate filler into the mixed pulp, deslagging by a deslagging device, degassing by a degassing tank, feeding into a pulp flowing box for net surfing, and squeezing the wet paper leaves out of the net part and into a squeezing part until the dryness is not less than 45%; drying the paper sheet to dryness not less than 90% at the surface temperature of a drying cylinder of 75-105 ℃ under normal pressure, and drying the paper sheet to dryness not less than 95% at the surface temperature of the drying cylinder of 55-70 ℃ under 0.3 atmosphere to obtain base paper;

4) uniformly mixing sodium carboxymethylcellulose, titanium dioxide, sodium hyaluronate and dimethylaminoethyl methacrylate in a weight ratio of 5:2:3:1 to obtain an isolation layer coating; uniformly mixing xanthan gum, silicon dioxide, methyl methacrylate and polyvinylpyrrolidone in a weight ratio of 7:5:3:1.2 to obtain a printing layer coating;

5) 5.2g/m of the isolating layer coating obtained in the step 4)²Coating the coating weight of the adhesive on the surface of the base paper obtained in the step 3) to obtain an isolating layer; then the printing layer coating obtained in the step 4) is coated at the concentration of 1.5g/m²The coating amount of the low-absorption high-efficiency transfer printing paper is coated on the surface of the isolation layer, and the low-absorption high-efficiency transfer printing paper is obtained.

Preferably, the basis weight of the paper in step 3) is 45g/m²。

Preferably, the method further comprises the following step 6): and keeping the low-absorption high-efficiency transfer printing paper at the temperature of 52 ℃ for 8min, and then performing calendaring treatment at room temperature and under the pressure of 0.5-2 MPa.

Preferably, the isolating layer coating also comprises 0.8 weight part of starch.

Preferably, the printing layer coating further comprises 1.8 parts by weight of tributyl phosphate.

Preferably, the coating is performed by a size press, and when the release layer coating is applied, the pressing pressure of the size press is: the upper roller is 1-1.2 bar, and the lower roller is 1.2-1.5 bar.

Preferably, the water absorption rate of the low-absorption high-efficiency transfer printing paper is less than 15g/m²。

The invention provides a preparation method of low-absorption high-efficiency transfer printing paper. The technical proposal improves the pulp components of the base paper and adopts a brand new manufacturing process. Specifically, the ramie is firstly pulped to 25 DEG SR, then is cured for 30min at 85 ℃ and 1.5 atmospheric pressures, and is evaporated to dryness to obtain cured ramie pulp; mixing cured ramie pulp and softwood pulp according to a specific amount, adding calcium carbonate filler, deslagging in a deslagging device, degassing in a degassing tank, feeding into a head box, screening, squeezing and drying to obtain base paper with good hydrophobicity. On the basis, sodium carboxymethylcellulose, titanium dioxide, sodium hyaluronate and dimethylaminoethyl methacrylate are mixed to obtain an isolation layer coating, xanthan gum, silicon dioxide, methyl methacrylate and polyvinylpyrrolidone are mixed to obtain a printing layer coating, and the low-absorption high-efficiency transfer printing paper is obtained by sequentially coating. Based on the process, the water absorption of the paper is obviously reduced, the printing effect is improved, and the process has outstanding technical advantages.

Detailed Description

Hereinafter, specific embodiments of the present invention will be described in detail. Well-known structures or functions may not be described in detail in the following embodiments in order to avoid unnecessarily obscuring the details. Approximating language, as used herein in the following examples, may be applied to identify quantitative representations that could permissibly vary in number without resulting in a change in the basic function. Unless defined otherwise, technical and scientific terms used in the following examples have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.