Preparation process of food oil-proof paper

Abstract

The invention discloses a preparation process of food oil-proof paper, and relates to the technical field of oil-proof papers, and an oil-proof coating is prepared from the following raw materials in parts by weight: 100 parts of flaky soil, 70-100 parts of latex, 0.1-0.2 part of a dispersing agent, 0.1-0.2 part of a defoaming agent, 0-2 parts of sodium carboxymethyl cellulose, 0-1 part of a water-resistant agent, 0-1 part of a lubricating agent and 0-0.5 part of NaOH; the raw materials are uniformly mixed and stirred to obtain the oil-proof coating for later use; preparing food-grade body paper, and coating the oil-proof coating prepared in the step 1 on a coating machine; the coated paper is subjected to infrared drying treatment; and performing an oil-proof grade test on the dried paper. The oil-proof paper is obtained by coating the raw paper with the oil-proof coating and drying, the obtained oil-proof paper has excellent oil-proof performance, and the manufacturing method is flexible, convenient to implement and low in cost.

Description

Technical Field

[0001] The invention relates to the technical field of oil-proof paper, and in particular to a preparation process of food oil-proof paper. Background Art

[0002] At present, as the application of paper is becoming more and more extensive, many applications require paper to have a certain degree of oil resistance, such as packaging paper for various foods. In addition to oil resistance, as society pays more and more attention to environmental protection, oil-proof materials using plastic, PE coating, or fluorine-containing coating are becoming less and less accepted by the public. Research and development of new, efficient, environmentally friendly, and low-cost oil-proof paper will become the mainstream of the development of the oil-proof paper field. Summary of the invention

[0003] The purpose of the present invention is to address the defects and shortcomings of the prior art and provide a preparation process for food oil-proof paper. The oil-proof coating is coated on base paper and the oil-proof paper is obtained after drying. The obtained oil-proof paper has excellent oil-proof performance, and the manufacturing method is flexible, easy to implement and low in cost.

[0004] To achieve the above object, the present invention adopts the following technical solution: its steps are as follows:

[0005] Step 1, preparation of oil-proof coating: raw materials by weight: 100 parts of flaky soil, 70-100 parts of latex, 0.1-0.2 parts of dispersant, 0.1-0.2 parts of defoamer, 0-2 parts of sodium carboxymethyl cellulose, 0-1 parts of water-resistant agent, 0-1 parts of lubricant, 0-0.5 parts of NaOH; the above raw materials are mixed and stirred to obtain the oil-proof coating, which is set aside;

[0006] Step 2: Prepare food-grade base paper and apply the oil-proof coating prepared in step 1 on a coating machine;

[0007] Step 3, subjecting the coated paper to infrared drying treatment;

[0008] Step 4: Test the oil-proof grade of the dried paper.

[0009] Furthermore, the oil-proof coating in step 1 has a solid content of 50-55%, a viscosity of 800-1000 cps, and a pH of 6.0-8.0.

[0010] Furthermore, the latex in step 1 is low-odor styrene acrylic latex and meets food grade standards.

[0011] Furthermore, the water-resistance agent in step 1 is potassium zirconium carbonate water-resistance agent.

[0012] Furthermore, the coating in step 2 is a single coating, and the coating amount is 5-8 g / ㎡.

[0013] Furthermore, the infrared drying temperature in step 3 is 105-115° C., and the drying time is 2-5 min.

[0014] Furthermore, the coating in step 2 is a two-layer coating, firstly, a coating is applied to the surface layer of the food-grade base paper, and the coating is performed by controlling the coating speed and coating pressure of the coating machine to ensure that the coating amount is 4-6g / ㎡, and then the coating is infrared dried at 105-115℃ for 2-5min. Then, a second coating is performed on the basis of this coating, and the coating amount is 4-7g / ㎡, and the coating is infrared dried at 105℃ for 2-5min.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a preparation process of food oil-proof paper, by coating an oil-proof coating on base paper and obtaining the oil-proof paper after drying, the obtained oil-proof paper has excellent oil-proof performance, and the manufacturing method is flexible, easy to implement and low in cost. DETAILED DESCRIPTION

[0016] The technical solution of the present invention is described clearly and completely below, and the preferred embodiments in the description are only used as examples. All other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the present invention.

[0017] Embodiment 1:

[0018] The steps of this embodiment are as follows:

[0019] Step 1, preparation of oil-proof coating: raw materials by weight: 100 parts of flaky soil, 70 parts of latex, 0.1 parts of dispersant, 0.1 parts of defoamer, 1 part of sodium carboxymethyl cellulose, 1 part of water-resistant agent, 1 part of lubricant, 0.5 parts of NaOH; the above raw materials are mixed and stirred evenly to obtain the oil-proof coating, and the obtained oil-proof coating has a solid content of 51%, a viscosity of 880 cps, and a pH of 7.5; the latex is a low-odor styrene-acrylic latex, which meets food grade standards; the water-resistant agent is a potassium zirconium carbonate water-resistant agent;

[0020] Step 2: Prepare food-grade base paper and apply a layer of oil-proof coating prepared in step 1 on the coating machine, with a coating amount of 5g / ㎡;

[0021] Step 3, subjecting the coated paper to infrared drying treatment, the infrared drying temperature is 105°C, and the drying time is 5 minutes;

[0022] Step 4: Test the oil resistance of the dried paper and it can reach level 3.

[0023] Embodiment 2:

[0024] The steps of this embodiment are as follows:

[0025] Step 1, preparation of oil-proof coating: raw materials by weight: 100 parts of flaky soil, 100 parts of latex, 0.1 parts of dispersant, 0.1 parts of defoamer, 1 part of sodium carboxymethyl cellulose, 1 part of water-resistant agent, 1 part of lubricant, 0.5 parts of NaOH; the above raw materials are mixed and stirred evenly to obtain the oil-proof coating, and the obtained oil-proof coating has a solid content of 54%, a viscosity of 900 cps, and a pH of 7.5; the latex is a low-odor styrene-acrylic latex that meets food grade standards; the water-resistant agent is a potassium zirconium carbonate water-resistant agent;

[0026] Step 2: Prepare food-grade base paper and apply a layer of oil-proof coating prepared in step 1 on the coating machine, with a coating amount of 8g / ㎡;

[0027] Step 3, subjecting the coated paper to infrared drying treatment, the infrared drying temperature is 105°C, and the drying time is 5 minutes;

[0028] Step 4: Test the oil resistance level of the dried paper, which can reach level 9.

[0029] Embodiment three:

[0030] The steps of this embodiment are as follows:

[0031] Step 1, preparation of oil-proof coating: raw materials by weight: 100 parts of flaky soil, 70 parts of latex, 0.1 parts of dispersant, 0.1 parts of defoamer, 1 part of sodium carboxymethyl cellulose, 1 part of water-resistant agent, 1 part of lubricant, 0.5 parts of NaOH; the above raw materials are mixed and stirred evenly to obtain the oil-proof coating, and the obtained oil-proof coating has a solid content of 51%, a viscosity of 880 cps, and a pH of 7.5; the latex is a low-odor styrene-acrylic latex, which meets food grade standards; the water-resistant agent is a potassium zirconium carbonate water-resistant agent;

[0032] Step 2: Prepare food-grade base paper and apply a layer of oil-proof coating prepared in step 1 on the coating machine, with a coating amount of 4g / ㎡;

[0033] Step 3, subjecting the coated paper in step 2 to infrared drying, the infrared drying temperature is 105°C, and the drying time is 5 minutes;

[0034] Step 4: Continue to apply a second coat on the coating dried in step 3, with a coating amount of 4g / ㎡, and perform infrared drying at 105℃ for 5min after coating;

[0035] Step 5: Test the oil resistance level of the dried paper, which can reach level 9.

[0036] Embodiment 4:

[0037] The steps of this embodiment are as follows:

[0038] Step 1, preparation of oil-proof coating: raw materials by weight: 100 parts of flaky soil, 100 parts of latex, 0.1 parts of dispersant, 0.1 parts of defoamer, 1 part of sodium carboxymethyl cellulose, 1 part of water-resistant agent, 1 part of lubricant, 0.5 parts of NaOH; the above raw materials are mixed and stirred evenly to obtain the oil-proof coating, and the obtained oil-proof coating has a solid content of 54%, a viscosity of 900 cps, and a pH of 7.5; the latex is a low-odor styrene-acrylic latex that meets food grade standards; the water-resistant agent is a potassium zirconium carbonate water-resistant agent;

[0039] Step 2: Prepare food-grade base paper and apply a layer of oil-proof coating prepared in step 1 on the coating machine, with a coating amount of 6g / ㎡;

[0040] Step 3, subjecting the coated paper in step 2 to infrared drying treatment, the infrared drying temperature is 115°C, and the drying time is 5 minutes;

[0041] Step 4: Continue to apply a second coat on the coating dried in step 3, with a coating amount of 7g / ㎡, and perform infrared drying at 105℃ for 5min after coating;

[0042] Step 5: Test the oil resistance level of the dried paper, which can reach level 12.

[0043] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a preparation process of food oil-proof paper, by coating an oil-proof coating on base paper and obtaining the oil-proof paper after drying, the obtained oil-proof paper has excellent oil-proof performance, and the manufacturing method is flexible, easy to implement and low in cost.

[0044] For those skilled in the art, they can modify the technical solutions described in the aforementioned embodiments and make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A preparation process of food oil-proof paper, characterized in that: Its steps are as follows: Step (1), preparation of oil-proof coating: raw materials by weight: 100 parts of flaky soil, 70-100 parts of latex, 0.1-0.2 parts of dispersant, 0.1-0.2 parts of defoamer, 0-2 parts of sodium carboxymethyl cellulose, 0-1 parts of water-resistance agent, 0-1 parts of lubricant, 0-0.5 parts of NaOH; the above raw materials are mixed and stirred to obtain the oil-proof coating, which is set aside; Step (2), preparing food-grade base paper, and coating it on a coating machine using the oil-proof coating prepared in step (1); Step (3), subjecting the coated paper to infrared drying; Step (4), testing the oil resistance level of the dried paper.

2. The process for preparing a food oil-proof paper according to claim 1, characterized in that: The oil-proof coating in step (1) has a solid content of 50-55%, a viscosity of 800-1000 cps, and a pH of 6.0-8.

0.

3. The process for preparing a food oil-proof paper according to claim 2, characterized in that: The latex in step (1) is low-odor styrene-acrylic latex and meets food grade standards.

4. The process for preparing a food oil-proof paper according to claim 3, characterized in that: The water-resistance agent in the step (1) is potassium zirconium carbonate water-resistance agent.

5. The process for preparing a food oil-proof paper according to claim 4, characterized in that: The coating in step (2) is a single coat, and the coating amount is 5-8 g / ㎡.

6. The process for preparing a food oil-proof paper according to claim 5, characterized in that: The infrared drying temperature in step (3) is 105-115° C., and the drying time is 2-5 min.

7. The process for preparing a food oil-proof paper according to claim 4, characterized in that: The coating in step (2) is a two-pass coating, wherein a coating is first applied to the surface layer of the food-grade base paper, and the coating is performed by controlling the coating speed and coating pressure of the coating machine to ensure that the coating amount is 4-6 g / m2. After coating, the coating is infrared dried at 105-115°C for 2-5 min, and then a second coating is performed on the basis of this coating, with a coating amount of 4-7 g / m2. After coating, the coating is infrared dried at 105°C for 2-5 min.