阅读说明：本技术 一种密胺树脂产品的印花方法及密胺容器 (Printing method of melamine resin product and melamine container ) 是由 陈杰 于 2019-10-23 设计创作，主要内容包括：本发明公开了一种密胺树脂产品的印花方法,包括以下步骤：烘烤、配制三聚氰胺甲醛树脂浆水、刷浆、烘烤、裁剪、预热、压制成型、贴花、加金、抛光、检验、包装。本发明的印花方法通过三次压塑成型制成密胺餐具产品,第一次压塑制成素面的密胺餐具产品,第二次压塑将花纸印在密胺餐具产品的外表面,第三次压塑把花纸贴在了密胺餐具产品的内表面,使得密胺餐具产品上的花色图案不易被破坏,具有瓷器一般的亮泽、光泽,外观精美,且硬度高,耐磕碰,耐腐蚀,稳定性好。(The invention discloses a printing method of a melamine resin product, which comprises the following steps: baking, preparing melamine formaldehyde resin slurry, brushing slurry, baking, cutting, preheating, pressing and forming, applique, gold adding, polishing, inspecting and packaging. The printing method of the invention prepares the melamine tableware product by three times of compression molding, prepares the plain melamine tableware product by the first compression molding, prints the pattern paper on the outer surface of the melamine tableware product by the second compression molding, and pastes the pattern paper on the inner surface of the melamine tableware product by the third compression molding, so that the pattern and color on the melamine tableware product are not easy to be damaged, and the melamine tableware product has the advantages of common brightness and luster of porcelain, exquisite appearance, high hardness, collision resistance, corrosion resistance and good stability.)

1. A method for printing melamine resin products, comprising the steps of:

(1) baking, namely hanging the long fiber stained paper in a baking oven at the temperature of 80-85 ℃ to bake the ink on the stained paper;

(2) preparing melamine formaldehyde resin slurry, firstly adding industrial purified water with the temperature of 90-95 ℃ and the mass of 700 g into a stirrer, wherein the water quality of the industrial purified water requires that the resistivity is more than or equal to 5M omega cm, then 218 g of 907-, stirring for 1 minute, then adding 32 grams of 906- & ltSUB & gt 250# LG model finishing powder, 32 grams of 906- & ltSUB & gt 2202# LG model finishing powder and 10 grams of 906-LG23# LG model finishing powder which are manufactured by Nanjing Bihua Biotech limited company, and stirring for 3 minutes to prepare melamine formaldehyde resin slurry;

(3) brushing pulp, namely brushing a layer of the melamine formaldehyde resin pulp water prepared in the step (2) on two sides of the baked stained paper in the step (1);

(4) baking, namely putting the stained paper brushed with the slurry in the step (3) into a baking oven for baking;

(5) cutting, cutting the baked stained paper in the step (4) according to the size of the flower-shaped pattern, and bonding the left end and the right end of the stained paper into a whole set of cylindrical shape by using glue to prepare a stained paper finished product;

(6) preheating, namely weighing the melamine resin powder by using a raw material box according to the mass of a melamine container product to be produced, and uniformly preheating the weighed melamine resin powder until the melamine resin powder is changed into a block shape which is coagulated but not scattered from a powder shape;

(7) pressing and molding, namely pouring blocky melamine resin powder into a compression molding machine for first compression molding and curing molding to prepare a plain melamine container product;

(8) applique, uniformly covering the finished pattern paper in the step (5) on the outer circumferential surface of the plain melamine container product in the step (7), starting the printing procedure of a compression molding machine to perform secondary compression molding, and printing the finished pattern paper on the melamine container product;

(9) adding gold, uniformly scattering a layer of light powder on the outer surface of the stained paper of the melamine container product, and starting a compression molding machine to perform third compression molding to obtain a finished melamine container product.

2. A method of printing a melamine resin product according to claim 1, wherein: the melamine resin powder is prepared from melamine formaldehyde resin, cellulose, pigment and additives.

3. A method of printing a melamine resin product according to claim 2, wherein: the melamine resin is prepared by performing hydroxymethylation reaction on melamine and formaldehyde and then performing polycondensation, wherein the hydroxymethylation reaction equation of the melamine and the formaldehyde is as follows:

4. a method of printing a melamine resin product according to claim 2 or 3, wherein: after the step (9), the method further comprises the following steps:

(10) polishing, namely polishing and polishing the rough edges of the melamine container finished product produced in the step (9);

(11) and (4) inspecting and packaging, performing quality inspection on the melamine container finished product, picking out unqualified and inferior products, and packaging the qualified melamine container product into a warehouse.

5. A method of printing a melamine resin product according to claim 1, wherein: preparing melamine formaldehyde resin slurry in the step (2), wherein the water quality of the industrial purified water requires the resistivity of 5M omega cm.

6. A method of printing a melamine resin product according to claim 1, wherein: and (1) baking, namely hanging the long fiber stained paper in a baking oven at the temperature of 82 ℃ for baking.

7. A melamine container characterized by: the melamine container is made by the printing process of any one of claims 1 to 6.

8. A melamine container according to claim 7, wherein: the melamine container is melamine tableware.

9. A melamine container according to claim 8, wherein: the inner surface and the outer surface of the melamine tableware are green.

10. A melamine container according to claim 8, wherein: the inner surface of the melamine tableware is white, and the outer surface of the melamine tableware is red.

Technical Field

The invention relates to the technical field of melamine tableware printing, in particular to a printing method of a melamine resin product and a melamine container.

Background

At present, melamine tableware, also called porcelain-like tableware, is formed by heating, pressurizing and pressing melamine resin powder. Melamine tableware is used in catering industry, children's diet industry, etc. because of its light weight, beautiful appearance, low temperature resistance, and non-fragility. The main component of melamine resin powder for producing melamine tableware is melamine formaldehyde resin, and the melamine resin powder is a three-dimensional net structure, so that the melamine resin powder belongs to a thermosetting raw material. The traditional printing method of melamine resin products is that melamine resin powder is heated, pressurized and pressed to form a plain melamine resin product, then stained paper is simply pasted on the outer surface of the melamine resin product, the printing effect is poor, and the outer surface of the melamine resin product is dark, dull, uneven and rough in appearance. Moreover, the stained paper is easy to deform and fade.

Disclosure of Invention

The invention aims to provide a printing method of a melamine resin product with good printing effect and a melamine container.

In order to achieve the above object, a first aspect of the present invention provides a method for printing melamine resin products, comprising the steps of:

(1) baking, namely hanging the long fiber stained paper in a baking oven at the temperature of 80-85 ℃ to bake the ink on the stained paper;

(2) preparing melamine formaldehyde resin slurry, firstly adding industrial purified water with the temperature of 90-95 ℃ and the mass of 700 g into a stirrer, wherein the water quality of the industrial purified water requires that the resistivity is more than or equal to 5M omega cm, then 218 g of 907-, stirring for 1 minute, then adding 32 grams of 906- & ltSUB & gt 250# LG model finishing powder, 32 grams of 906- & ltSUB & gt 2202# LG model finishing powder and 10 grams of 906-LG23# LG model finishing powder which are manufactured by Nanjing Bihua Biotech limited company, and stirring for 3 minutes to prepare melamine formaldehyde resin slurry;

(3) brushing pulp, namely brushing a layer of the melamine formaldehyde resin pulp water prepared in the step (2) on two sides of the baked stained paper in the step (1);

(4) baking, namely putting the stained paper brushed with the slurry in the step (3) into a baking oven for baking;

(5) cutting, cutting the baked stained paper in the step (4) according to the size of the flower-shaped pattern, and bonding the left end and the right end of the stained paper into a whole set of cylindrical shape by using glue to prepare a stained paper finished product;

(6) preheating, namely weighing the melamine resin powder by using a raw material box according to the mass of a melamine container product to be produced, and uniformly preheating the weighed melamine resin powder until the melamine resin powder is changed into a block shape which is coagulated but not scattered from a powder shape;

(7) pressing and molding, namely pouring blocky melamine resin powder into a compression molding machine for first compression molding and curing molding to prepare a plain melamine container product;

(8) applique, evenly sleeving the finished stained paper in the step (5) on the outer circumferential surface of the plain melamine tableware product in the step (7), starting the printing program of the compression molding machine to perform secondary compression molding, and printing the finished stained paper on the melamine container product;

(9) adding gold, uniformly scattering a layer of light powder on the outer surface of the stained paper of the melamine container product, and starting a compression molding machine to perform third compression molding to obtain a finished melamine container product.

Further, the melamine resin powder is made of melamine formaldehyde resin, cellulose, pigment, and additives.

Further, in the production process of melamine resin, melamine resin is produced by the polycondensation of melamine and formaldehyde through the hydroxymethylation reaction, melamine resin is a thermosetting amino resin with a wide range of applications, and the hydroxymethylation reaction equation of melamine and formaldehyde is as follows:

further, step (9) is followed by:

(10) polishing, namely polishing and polishing the rough edges of the melamine container finished product produced in the step (9);

(11) and (4) inspecting and packaging, performing quality inspection on the melamine container finished product, picking out unqualified and inferior products, and packaging the qualified melamine container product into a warehouse.

Further, the melamine formaldehyde resin slurry is prepared in the step (2), and the water quality of the industrial pure water requires the resistivity to be 5M omega cm.

Further, baking in the step (1), namely hanging the long fiber stained paper in a baking oven with the temperature of 82 ℃ for baking.

In a second aspect of the present invention, there is provided a melamine container comprising the melamine container according to any one of the above aspects.

Further, the melamine container is melamine tableware.

Further, the inner and outer surfaces of the melamine tableware were green.

Further, the inner surface of the melamine tableware was white, and the outer surface was red.

In summary, the technical scheme of the invention has the following beneficial effects: the printing method comprises the following steps of (2) preparing melamine formaldehyde resin slurry required by brushing the stained paper by specific components and proportions, and brushing the stained paper by using the melamine formaldehyde resin slurry, wherein the brushed stained paper has clear and fine pattern layers, saturated colors, accurate color register, no moire and picture defects, ideal ductility and difficult fracture during transfer and ideal barbecuing effect. Because the compression molding machine is formed by high-temperature and high-pressure curing, when general stained paper is subjected to secondary compression molding and pasting in the step (8), the stained paper is easy to deform and wrinkle, so that the color and luster of the stained paper are damaged, and the melamine formaldehyde resin slurry prepared in the step (2) is brushed on the surface of the stained paper, so that the stained paper is not easy to deform and fade, has good stability, and can keep the color and luster of the stained paper. In addition, the melamine tableware product is molded by three times of compression molding, the melamine tableware product with a plain surface is manufactured by the first compression molding, the pattern paper is printed on the outer surface of the melamine tableware product by the second compression molding, and the light powder is covered on the outer surface of the pattern paper by the third compression molding to isolate the pattern paper from the external environment, so that the pattern and design of the pattern paper on the melamine tableware product are not easy to damage, and the pattern and design have the general brightness and luster of porcelain, exquisite appearance, high hardness, collision resistance, corrosion resistance and good stability.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, but the scope of the present invention is not limited thereto.

The embodiment provides a printing method of melamine resin products, which comprises the following steps:

(1) baking, namely hanging a wad of 50 pieces of long fiber stained paper in a baking oven at the temperature of 80-85 ℃ to bake the printing ink on the stained paper, wherein the temperature is preferably 82 ℃;

(2) preparing melamine formaldehyde resin slurry, firstly adding industrial purified water with the temperature of 90-95 ℃ and the mass of 700 g into a stirrer, wherein the water quality of the industrial purified water requires that the resistivity is more than or equal to 5M omega cm, then 218 g of 907-, stirring for 1 minute, then adding 32 grams of 906- & ltSUB & gt 250# LG model finishing powder, 32 grams of 906- & ltSUB & gt 2202# LG model finishing powder and 10 grams of 906-LG23# LG model finishing powder which are manufactured by Nanjing Bihua Biotech limited company, and stirring for 3 minutes to prepare melamine formaldehyde resin slurry;

(3) brushing pulp, namely brushing a layer of the melamine formaldehyde resin pulp water prepared in the step (2) on two sides of the baked stained paper in the step (1);

(4) baking, namely putting the stained paper brushed with the slurry in the step (3) into a baking oven for baking;

(5) cutting, cutting the baked stained paper in the step (4) according to the size of the flower-shaped pattern, and bonding the left end and the right end of the stained paper into a whole set of cylindrical shape by using glue to prepare a stained paper finished product;

(6) preheating, namely weighing the melamine resin powder by using a raw material box according to the mass of a melamine container product to be produced, and uniformly preheating the weighed melamine resin powder until the melamine resin powder is changed into a block shape which is coagulated but not scattered from a powder shape;

(7) pressing and molding, namely pouring blocky melamine resin powder into a compression molding machine for first compression molding and curing molding to prepare a plain melamine container product;

(8) applique, uniformly covering the finished pattern paper in the step (5) on the outer circumferential surface of the plain melamine container product in the step (7), starting the printing procedure of a compression molding machine to perform secondary compression molding, and printing the finished pattern paper on the melamine container product;

(9) adding gold, uniformly scattering a layer of light powder on the outer surface of the stained paper of the melamine container product, and starting a compression molding machine to perform third compression molding to obtain a finished melamine container product. The quantity of the light powder which can not be scattered is too small, otherwise the color and luster degree of the melamine container product can be influenced, certainly, the quantity of the light powder which can not be scattered is too large, the patterns and colors which are scattered with more stained paper can be covered, and only one layer of the light powder needs to be scattered.

In the present embodiment, the melamine resin powder is made of melamine formaldehyde resin, cellulose, pigment, and additives.

In the production process of melamine resin, melamine resin is prepared by performing hydroxymethylation reaction on melamine and formaldehyde and then performing polycondensation, the melamine resin is thermosetting amino resin with wide application range, and the hydroxymethylation reaction equation of the melamine and the formaldehyde is as follows:

specifically, step (9) is followed by:

(10) polishing, namely polishing and polishing the rough edges of the melamine container finished product produced in the step (9), so that the edge opening of the melamine container product is smoother, and the outside is more exquisite;

(11) and (4) inspecting and packaging, performing quality inspection on the melamine container finished product, picking out unqualified and inferior products, and packaging the qualified melamine container product into a warehouse.

In a second aspect of the present invention, there is provided a melamine container comprising the melamine container according to any one of the above aspects.

Specifically, the melamine container is melamine tableware.

As a preferred embodiment of this example, both the inner and outer surfaces of the melamine tableware were green. The melamine tableware with green color or other single color is produced by changing the pigment of melamine resin powder into pigment of corresponding color.

In another preferred embodiment of this embodiment, the melamine tableware article has white inner surface and red outer surface. The production of said two-colour melamine tableware is made up by using melamine tableware whose white plain surface is made up by compression moulding, then uniformly scattering a layer of melamine resin powder with red pigment on its external surface, then making compression moulding and curing so as to obtain the invented product.

In summary, the technical scheme of the invention has the following beneficial effects: the printing method comprises the following steps of (2) preparing melamine formaldehyde resin slurry required by brushing the stained paper by specific components and proportions, and brushing the stained paper by using the melamine formaldehyde resin slurry, wherein the brushed stained paper has clear and fine pattern layers, saturated colors, accurate color register, no moire and picture defects, ideal ductility and difficult fracture during transfer and ideal barbecuing effect. Because the compression molding machine is formed by high-temperature and high-pressure curing, when general stained paper is subjected to secondary compression molding and pasting in the step (8), the stained paper is easy to deform and wrinkle, so that the color and luster of the stained paper are damaged, and the melamine formaldehyde resin slurry prepared in the step (2) is brushed on the surface of the stained paper, so that the stained paper is not easy to deform and fade, has good stability, and can keep the color and luster of the stained paper. In addition, the melamine tableware product is molded by three times of compression molding, the melamine tableware product with a plain surface is manufactured by the first compression molding, the pattern paper is printed on the outer surface of the melamine tableware product by the second compression molding, and the light powder is covered on the outer surface of the pattern paper by the third compression molding to isolate the pattern paper from the external environment, so that the pattern and design of the pattern paper on the melamine tableware product are not easy to damage, and the pattern and design have the general brightness and luster of porcelain, exquisite appearance, high hardness, collision resistance, corrosion resistance and good stability.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.