Transparent ceramic coating material for PLA tableware surface treatment and construction technology

Abstract

The invention provides a transparent ceramic coating material for PLA tableware surface treatment and a construction process. The transparent ceramic coating material for PLA tableware surface treatment comprises the following components in parts by mass: 10 parts of a component A and 1 part of a component B, the component A comprises 90 parts of ceramic resin; 0.2 to 0.5 part of a wetting agent; 0.2 to 0.5 part of a flatting agent; 10 parts of anhydrous alcohol; and the component B comprises a curing agent. The hardness of the processed PLA tableware reaches 6H, the coating is glittering and translucent, and the attractiveness of the product is improved; after being boiled in water at 95 DEG C for 151 hours, the coating does not fall off; the color is not changed after being baked at high temperature and is not changed after being baked for 1 hour under the condition of 180 DEG C; in addition, the coating is ultrathin and is only 5-8 microns, so that the cost is low.

Description

Technical Field

[0001] The invention relates to the technical field of PLA tableware, and in particular to a transparent ceramic coating material and a construction process for surface treatment of PLA tableware. Background Art

[0002] PLA, the full name of which is Polylactic Acid, is a bio-based plastic made from renewable resources (such as corn starch or sugar cane). PLA has received widespread attention for its biodegradability and environmental friendliness. The PLA tableware currently developed is expected to replace melamine tableware on a large scale, with an annual domestic and international market capacity of 600,000 tons, so the product has huge economic benefits. However, the tableware made of this material has an obvious defect, that is, the surface hardness is too low, and it is easy to be scratched during use, which reduces the appearance and shortens the service life. Summary of the invention

[0003] The invention proposes a transparent ceramic coating material and a construction process for surface treatment of PLA tableware, which solves the defect that the surface hardness of the existing PLA tableware is too low and is easily scratched during use, thereby reducing the appearance and shortening the service life.

[0004] The technical solution of the present invention is as follows:

[0005] The present invention firstly proposes a transparent ceramic coating material for surface treatment of PLA tableware, which comprises 10 parts of component A and 1 part of component B by weight;

[0006] In parts by mass, component A includes:

[0007] Ceramic resin: 90 parts;

[0008] Wetting agent: 0.2-0.5 parts;

[0009] Leveling agent: 0.2-0.5 parts;

[0010] Anhydrous alcohol: 10 parts;

[0011] Component B includes: a curing agent.

[0012] Preferably, when used, component A and component B are fully mixed, and the mixed solution should be used up within 8 hours.

[0013] Preferably, component A is prepared by sequentially adding anhydrous alcohol, a wetting agent, and a leveling agent into the ceramic resin and stirring the mixture fully using a mixer.

[0014] The present invention secondly proposes a construction process for surface treatment of PLA tableware, comprising the following steps:

[0015] (1) Pretreatment of PLA tableware

[0016] Inject plasma water into the ultrasonic cleaner, and introduce anhydrous alcohol in a mass ratio of ionized water to anhydrous alcohol of 10:1, and vibrate and clean the PLA tableware for 5 minutes; take out the PLA tableware, wipe it clean with a dust-free cleaning cloth, and put the PLA tableware into an oven for drying at 25°C for 5-10 minutes;

[0017] (2) Spraying

[0018] a. Use the transparent ceramic coating material for surface treatment of PLA tableware described above, fully mix component A and component B, filter with a 350-mesh funnel, and spray the filtered components into a paint can;

[0019] b. Spraying should be carried out in a clean workshop of 100,000 grade, with a temperature of 20-26 degrees and a humidity not exceeding 85%;

[0020] c. Use a can-type, 1.5 mm caliber spray gun to spray the surface of the PLA tableware with a thickness of 5-8 microns;

[0021] (3) Curing

[0022] Put the sprayed PLA tableware into the oven, first dry it at 25 degrees for 1-20 minutes, then raise the temperature to 80 degrees within 15 minutes, maintain it for 20 minutes, then raise the temperature to 180 degrees within 15 minutes, maintain it for 1 hour, and finally cool it to 80 degrees in the oven and take out the PLA tableware.

[0023] Beneficial effects of the present invention: Through experiments and verification, the transparent ceramic coating material for surface treatment of PLA tableware of the present invention, after being sprayed on the surface of PLA tableware, can make the hardness of PLA tableware reach 6H, the coating is crystal clear, and the aesthetics of the product is improved; it is boiled in water at 95 degrees and does not fall off for 151 hours; it does not change color when baked at high temperature, and it does not change color when baked at 180 degrees for 1 hour; in addition, the coating is ultra-thin, only 5-8 microns, and the cost is low. DETAILED DESCRIPTION

[0024] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Example 1

[0026] A transparent ceramic coating material for surface treatment of PLA tableware.

[0027] In parts by mass, it includes 10 parts of component A and 1 part of component B;

[0028] In parts by mass, component A includes:

[0029] Ceramic resin: 90 parts;

[0030] Wetting agent: 0.2-0.5 parts;

[0031] Leveling agent: 0.2-0.5 parts;

[0032] Anhydrous alcohol: 10 parts;

[0033] Component B includes: a curing agent.

[0034] Preferably, when used, component A and component B are fully mixed, and the mixed solution should be used up within 8 hours.

[0035] Preferably, component A is prepared by sequentially adding anhydrous alcohol, a wetting agent, and a leveling agent into the ceramic resin and stirring the mixture fully using a mixer.

[0036] Example 2

[0037] A construction process for surface treatment of PLA tableware, comprising the following steps:

[0038] (1) Pretreatment of PLA tableware

[0039] Inject plasma water into the ultrasonic cleaner, and introduce anhydrous alcohol in a mass ratio of ionized water to anhydrous alcohol of 10:1, and vibrate and clean the PLA tableware for 5 minutes; take out the PLA tableware, wipe it clean with a dust-free cleaning cloth, and put the PLA tableware into an oven for drying at 25°C for 5-10 minutes;

[0040] (2) Spraying

[0041] a. Use the transparent ceramic coating material for surface treatment of PLA tableware in Example 1, fully mix component A and component B, filter with a 350-mesh funnel, and spray the filtered components into a paint can;

[0042] b. Spraying should be carried out in a clean workshop of 100,000 grade, with a temperature of 20-26 degrees and a humidity not exceeding 85%;

[0043] c. Use a can-type, 1.5 mm caliber spray gun to spray the surface of the PLA tableware with a thickness between 5-8 microns.

[0044] (3) Curing

[0045] Put the sprayed PLA tableware into the oven, first dry it at 25 degrees for 1-20 minutes, then raise the temperature to 80 degrees within 15 minutes, maintain it for 20 minutes, then raise the temperature to 180 degrees within 15 minutes, maintain it for 1 hour, and finally cool it to 80 degrees in the oven and take out the PLA tableware.

[0046] Performance Testing

[0047] The transparent ceramic coating material for surface treatment of PLA tableware in Example 1 and the construction process in Example 2 are used to process PLA tableware.

[0048] (1) Hardness test

[0049] The 6 processed PLA tableware were tested separately using a hardness tester, and the hardness of the 5 PLA tableware was 6H.

[0050] (2) Boiling test

[0051] The five processed PLA tableware were boiled in 95-degree hot water. The PLA tableware was integrated and immersed in water, and the temperature was kept at 95 degrees. The tableware was boiled for 151 hours, and the transparent ceramic coating material sprayed on the surface for surface treatment of the PLA tableware did not fall off.

[0052] (3) High temperature resistance and anti-discoloration test

[0053] The 8 processed PLA tableware were placed in an oven at 180 degrees for 1 hour. After cooling, the color of the surface coating of the PLA tableware was observed. All 10 were transparent and did not change to other colors.

[0054] Through the above tests, it can be known that the transparent ceramic coating material used for the surface treatment of PLA tableware and the PLA tableware processed by the construction process of Example 2 have high hardness, good boiling resistance, and good high temperature resistance and anti-discoloration performance. In addition, through the curing process in Example 2, it can also be known that PLA tableware can withstand a temperature of 180 degrees. In addition, the spraying thickness is between 5-8 microns, and the cost is low.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A transparent ceramic coating material for surface treatment of PLA tableware, characterized by: In parts by mass, it includes 10 parts of component A and 1 part of component B; In parts by mass, component A includes: Ceramic resin: 90 parts; Wetting agent: 0.2-0.5 parts; Leveling agent: 0.2-0.5 parts; Anhydrous alcohol: 10 parts; Component B includes: a curing agent.

2. The transparent ceramic coating material for surface treatment of PLA tableware according to claim 1, characterized in that: When using, component A and component B should be fully mixed and the mixed solution should be used up within 8 hours.

3. The transparent ceramic coating material for surface treatment of PLA tableware according to claim 1, characterized in that: The preparation of component A is to add anhydrous alcohol, wetting agent and leveling agent to the ceramic resin in sequence and use a mixer to stir them thoroughly.

4. A construction process for surface treatment of PLA tableware, characterized in that: The following steps are involved: (1) Pretreatment of PLA tableware Inject plasma water into the ultrasonic cleaner, and introduce anhydrous alcohol in a mass ratio of ionized water to anhydrous alcohol of 10:1, and vibrate and clean the PLA tableware for 5 minutes; take out the PLA tableware, wipe it clean with a dust-free cleaning cloth, and put the PLA tableware into an oven for drying at 25°C for 5-10 minutes; (2) Spraying a. Use the transparent ceramic coating material for surface treatment of PLA tableware in claim 1, fully mix component A and component B, filter with a 350-mesh funnel, and spray the filtered components into a paint can; b. Spraying should be carried out in a clean workshop of 100,000 grade, with a temperature of 20-26 degrees and a humidity not exceeding 85%; c. Use a can-type, 1.5 mm caliber spray gun to spray the surface of the PLA tableware with a thickness of 5-8 microns; (3) Curing Put the sprayed PLA tableware into the oven, first dry it at 25 degrees for 1-20 minutes, then raise the temperature to 80 degrees within 15 minutes, maintain it for 20 minutes, then raise the temperature to 180 degrees within 15 minutes, maintain it for 1 hour, and finally cool it to 80 degrees in the oven and take out the PLA tableware.