Manufacturing process of suede canvas

Abstract

According to the manufacturing process of the suede canvas, in the scheme, a screen printing device is used for gluing the canvas, then electrostatic flocking equipment is used for flocking, the forming speed of the canvas is high, a subsequently formed pattern can have more spatial stereoscopic impression through flocking, the aesthetic requirement is met, in the scheme, the components of a glue solution are limited, and the production efficiency is improved. Water-borne epoxy resin is matched with water-borne polyurethane and polyethyleneimine to form an interpenetrating network structure, the hardness, water resistance, scraping resistance and the like are improved, and by adding polyethyleneimine and nano titanium dioxide, the adhesive force with the canvas and the flocking firmness are improved.

Description

Technical Field

[0001] The invention relates to the technical field of canvas, and in particular to a manufacturing process of velvet canvas. Background Art

[0002] With the improvement of living standards and aesthetics, traditional calligraphy and painting can no longer meet people's diversified needs. Suede calligraphy and painting are popular in the market because of their strong spatial three-dimensional sense. Conventionally, the velvet is implanted on the canvas through the electrostatic flocking process. Before flocking, glue needs to be brushed on the canvas. The formed glue film is adhered to the canvas and used to adhere the velvet. The defect is that the bonding strength between conventional glue and canvas is poor, and the glue film is prone to falling off later, which needs to be improved. Summary of the invention

[0003] To solve at least one of the above technical defects, the present invention provides the following technical solutions:

[0004] This application document discloses a manufacturing process of suede canvas, comprising the following steps:

[0005] First, the canvas is coated with glue using a silk-screen device, wherein the glue solution includes, by weight, 30-45 parts of waterborne epoxy resin, 20-30 parts of waterborne polyurethane, 0.4-0.6 parts of polyethyleneimine, 0.05-0.08% of nano titanium dioxide, and 4-12 parts of additives;

[0006] Second, the electrostatic flocking equipment performs high-voltage electrostatic flocking on the glued canvas;

[0007] Third, dry and clean the flocked canvas.

[0008] In this scheme, the canvas is glued with a silk-screen device, and then flocked with an electrostatic flocking device. The canvas is formed quickly, and the subsequent formed pattern can be made more three-dimensional through flocking to meet aesthetic needs. In this scheme, the components of the glue are limited, and water-based epoxy resin is combined with water-based polyurethane and polyethyleneimine to form an interpenetrating network configuration, which helps to improve hardness, water resistance and scratch resistance. The addition of polyethyleneimine and nano-titanium dioxide helps to improve the adhesion to the canvas and the firmness of flocking.

[0009] Furthermore, the parameters of the high-voltage electrostatic flocking are set as follows: voltage 260-380V, current 18-23A, and flocking time 10-14s. Under the limited parameters, flocking can be performed better and faster, and the flocking effect is good.

[0010] Furthermore, in the third step, the drying temperature is 100-140° C., and the drying time is 70-100 seconds. In the second step, the fluff is made of viscose material. Limiting the drying temperature helps shorten the drying time. The viscose fluff can further improve the bonding strength with the glue brushed on the canvas.

[0011] Furthermore, the auxiliary agent includes a film-forming auxiliary agent and a thickener, wherein the mass ratio of the film-forming auxiliary agent to the thickener is 2-4:1, and the film-forming auxiliary agent and the thickener can better enable the glue to form a film.

[0012] Furthermore, the film-forming aid is of alcohol ester type or alcohol type, and the thickener is of polyacrylic acid type or cellulose type.

[0013] Furthermore, in the second step, the screen printing plate in the electrostatic flocking equipment is pressed on the canvas, and the glue is scraped with a scraper, and the scraper pressure is 1.5-3KG to better scrape the glue liquid.

[0014] Furthermore, the canvas is oil canvas or white card paper.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention designs the flocking process of the canvas, so that the subsequently formed pattern has a stronger sense of space, the canvas forming speed is greatly improved, and the adhesive composition ratio of the glue is limited to improve the bonding strength between the glue and the canvas and the fluff, thereby improving the stability of the flocking. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with specific embodiments.

[0018] Example 1

[0019] A manufacturing process of suede canvas comprises the following steps:

[0020] First, a semi-automatic silk-screen printing device is used to apply glue to the canvas. The canvas is an oil canvas. During the gluing process, the semi-automatic silk-screen printing device presses the canvas with a silk-screen printing plate, and then a scraper is used to scrape the glue under a pressure of 2KG. The glue liquid includes 32 parts of water-based epoxy resin (2384w / 57WA), 23 parts of water-based polyurethane (1630A), 0.4 parts of polyethyleneimine, 0.05% of nano titanium dioxide, and 8 parts of additives by mass. The additives include film-forming additives and thickeners. The mass ratio of film-forming additives to thickeners is 3:1. The film-forming additive is alcohol ester twelve, and the thickener is RM-8W.

[0021] Second, the electrostatic flocking equipment performs high-voltage electrostatic flocking on the glued canvas, and the parameters are set as follows: voltage 300V, current 20A, flocking time 10s, and the fluff is made of viscose material.

[0022] Third, dry the flocked canvas at 100°C for 80 seconds, and then clean up the excess fluff.

[0023] Example 2

[0024] A manufacturing process of suede canvas comprises the following steps:

[0025] First, a semi-automatic silk-screen printing device is used to apply glue to the canvas. The canvas is an oil canvas. During the gluing process, the semi-automatic silk-screen printing device presses the canvas with a silk-screen printing plate, and then a scraper is used to scrape the glue under a pressure of 3KG. The glue liquid includes 36 parts of water-based epoxy resin (2384w / 57WA), 26 parts of water-based polyurethane (1630A), 0.5 parts of polyethyleneimine, 0.06% of nano titanium dioxide, and 10 parts of additives by mass. The additives include film-forming additives and thickeners. The mass ratio of film-forming additives to thickeners is 4:1. The film-forming additive is alcohol ester twelve, and the thickener is RM-8W.

[0026] Second, the electrostatic flocking equipment performs high-voltage electrostatic flocking on the glued canvas, and the parameters are set as follows: voltage 320V, current 19A, flocking time 10s, and the fluff is made of viscose material.

[0027] Third, dry the flocked canvas at 120°C for 70 seconds, and then clean up the excess fluff.

[0028] Example 3

[0029] A manufacturing process of suede canvas comprises the following steps:

[0030] First, a semi-automatic silk-screen printing device is used to apply glue to the canvas. The canvas is an oil canvas. During the gluing process, the semi-automatic silk-screen printing device presses the canvas with a silk-screen printing plate, and then a scraper is used to scrape the glue under a pressure of 4KG. The glue liquid includes 40 parts of water-based epoxy resin (2384w / 57WA), 29 parts of water-based polyurethane (1630A), 0.5 parts of polyethyleneimine, 0.07% of nano titanium dioxide, and 10 parts of additives by mass. The additives include film-forming additives and thickeners. The mass ratio of film-forming additives to thickeners is 3:1. The film-forming additive is alcohol ester twelve, and the thickener is RM-8W.

[0031] Second, the electrostatic flocking equipment performs high-voltage electrostatic flocking on the glued canvas, and the parameters are set as follows: voltage 320V, current 20A, flocking time 12s, and the fluff is made of viscose material.

[0032] Third, dry the flocked canvas at 130°C for 90 seconds, and then clean up the excess fluff.

[0033] Comparative Example 1

[0034] Compared with Example 1, the glue in this example does not contain nano titanium dioxide.

[0035] In the test of the formed canvas, it was found that the bonding strength between the adhesive film formed by the adhesive liquid in Comparative Example 1 and the canvas was about 80% of the corresponding bonding strength in Example 1. After the pattern was formed on the fluff, the canvas had a stronger sense of space and could meet the existing aesthetic needs.

[0036] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A process for producing suede canvas, characterized in that: The following steps are involved: First, the canvas is coated with glue using a silk-screen device, wherein the glue solution includes, by weight, 30-45 parts of waterborne epoxy resin, 20-30 parts of waterborne polyurethane, 0.4-0.6 parts of polyethyleneimine, 0.05-0.08% of nano titanium dioxide, and 4-12 parts of additives; Second, the electrostatic flocking equipment performs high-voltage electrostatic flocking on the glued canvas; Third, dry and clean the flocked canvas.

2. The manufacturing process of a suede canvas according to claim 1, characterized in that: The parameters of the high-voltage electrostatic flocking are set as follows: voltage 260-380V, current 18-23A, and flocking time 10-14s.

3. The manufacturing process of a suede canvas according to claim 1, characterized in that: In the third step, the drying temperature is 100-140° C., the drying time is 70-100 seconds, and in the second step, the fluff is made of viscose material.

4. The manufacturing process of a suede canvas according to claim 1, characterized in that: The auxiliary agent includes a film-forming auxiliary agent and a thickener, wherein the mass ratio of the film-forming auxiliary agent to the thickener is 2-4:

1.

5. The manufacturing process of a suede canvas according to claim 4, characterized in that: The film-forming aid is of alcohol ester type or alcohol type, and the thickener is of polyacrylic acid type or cellulose type.

6. The manufacturing process of a suede canvas according to claim 1, characterized in that: In the second step, the screen printing plate in the electrostatic flocking equipment is pressed on the canvas, and the glue is scraped with a scraper, and the scraper pressure is 1.5-3KG.

7. The manufacturing process of a suede canvas according to claim 1, characterized in that: The canvas is oil canvas or white card paper.