阅读说明：本技术 可降解用快餐盒包装材料及其制法 (Degradable snack box packing material and its making process ) 是由 李晓燕 孙永健 刘洪均 李昌华 于 2020-12-24 设计创作，主要内容包括：本发明提供一种可降解用快餐盒包装材料及其制备方法。该包装材料包括食品级可降解聚酯类无纺布以及涂覆于无纺布表面的吸湿液,所述吸湿液的厚度为1-100nm,所述吸湿液包括丙烯酰胺-丙烯腈-丙烯酸三元共聚物吸水树脂。本申请提供的可降解用快餐盒包装材料用于一次性外卖餐盒时,在1h内使食物保鲜,口味佳且制得的材料在自然环境下可充分降解,即在使用后3个月内置于环境中可降解,降解后为绿色无害的物质,且制备方法简单易行、绿色环保是一种安全经济的制备工艺。(The invention provides a degradable snack box packaging material and a preparation method thereof. The packaging material comprises food-grade degradable polyester non-woven fabric and moisture absorption liquid coated on the surface of the non-woven fabric, wherein the thickness of the moisture absorption liquid is 1-100nm, and the moisture absorption liquid comprises acrylamide-acrylonitrile-acrylic acid terpolymer water absorption resin. When the degradable snack box packaging material provided by the application is used for disposable take-away snack boxes, food is kept fresh within 1h, the taste is good, the prepared material can be fully degraded in natural environment, namely, the material can be degraded in the environment after being used for 3 months, the degraded material is a green and harmless substance, and the preparation method is simple and easy, green and environment-friendly, and is a safe and economic preparation process.)

1. A degradable snack box packaging material is characterized by comprising food-grade degradable polyester non-woven fabric and moisture absorption liquid coated on the surface of the non-woven fabric,

wherein the thickness of the hygroscopic solution is 1-100 nm;

the absorbent liquid comprises acrylamide-acrylonitrile-acrylic acid terpolymer absorbent resin.

2. A degradable snack box packaging material of claim 1 wherein said acrylamide-acrylonitrile-acrylic acid terpolymer is present in an amount of 10 wt% to 30 wt% of the moisture absorbing liquid.

3. A method of making a degradable snack box packaging material of any of claims 1-2 comprising the steps of:

(1) adding room-temperature tap water into the reaction kettle, and then adding nano-scale sodium chloride until the nano-scale sodium chloride is completely dissolved to prepare a saturated sodium chloride solution;

(2) adding corn starch into a saturated sodium chloride solution, and stirring for 2-3 hours at the temperature of 30-60 ℃ to obtain a viscous liquid;

(3) adding acrylamide-acrylonitrile-acrylic acid terpolymer into the viscous liquid, raising the temperature of the reaction kettle to 60-80 ℃, continuously stirring until the terpolymer is completely dissolved, and cooling to obtain the hygroscopic solution;

(4) and adding the moisture absorption liquid to a coating machine, conventionally coating the front side and the back side of the food-grade degradable polyester non-woven fabric, and finally obtaining the degradable snack box packaging material after drying.

4. The method for preparing the degradable snack box packaging material of claim 3, wherein the food grade degradable polyester nonwoven fabric has a specification of 60-70 g/m²。

5. The method for preparing the degradable snack box packaging material of claim 3, wherein the polymerization degree of the acrylamide-acrylonitrile-acrylic acid terpolymer is 10000-1000000;

preferably, the molar weight ratio of the acrylamide, the acrylonitrile and the acrylic acid in the acrylamide-acrylonitrile-acrylic acid terpolymer is 1:1-2: 1-4.

6. The preparation method of the degradable snack box packaging material of claim 3, wherein the mass ratio of the corn starch to the acrylamide-acrylonitrile-acrylic acid terpolymer is 1: 20-30.

7. The method for preparing the degradable snack box packaging material as recited in claim 3, wherein the particle size of the sodium chloride edible salt is 100-300 nm.

8. The method for preparing a degradable snack box packaging material of claim 3, wherein the content of the acrylamide-acrylonitrile-acrylic acid terpolymer is 20 wt% to 30 wt% of the content of the moisture absorption liquid.

9. Use of a degradable snack box packaging material prepared according to any of claims 1-2 or a cocoa degradable snack box packaging material prepared according to any of claims 3-8 in food packaging.

10. Use according to claim 9, wherein the degradable snack box packaging material is used in disposable take-away snack boxes.

Technical Field

The invention relates to a degradable snack box packaging material, in particular to a degradable snack box packaging material and a preparation method thereof.

Background

With the development of social economy, people pursue to eat food instead of being full, and meanwhile, due to the high-speed development of the traffic industry, the food industry develops rapidly, and the circulation and the scale become wider and wider. During the circulation and transportation of food, how to maintain the quality of the food is a key.

The fast food is a dining mode selected by many people at present, the generated fast food garbage is more and more, great pressure is brought to the environment, and the food cannot be kept fresh due to overlong time in the fast food transportation process, so that high requirements are put forward for the fast food box used by the fast food, the fast food box material in the prior art cannot be degraded or is degraded for a long time, and therefore how to provide the degradable fast food box and ensure the taste of the food is a problem to be solved urgently.

Disclosure of Invention

The invention aims to provide a degradable snack box packaging material and a preparation method thereof so as to overcome the defects that the snack box material in the prior art can not be degraded or the degradation time is longer and the food can not be preserved.

In order to achieve the purpose, the technical scheme adopted by the invention comprises the following steps:

a degradable snack box packaging material comprises food-grade degradable polyester non-woven fabrics and moisture absorption liquid coated on the surface of the non-woven fabrics,

the absorbent liquid comprises acrylamide-acrylonitrile-acrylic acid terpolymer absorbent resin.

Wherein the thickness of the hygroscopic solution is 1-100 nm.

Optionally, the upper limit of the thickness of the hygroscopic solution is selected from 5nm, 10nm, 15nm, 20nm, 30nm, 40nm, 50nm, 60nm, 70nm, 80nm, 90nm, 100 nm; the lower limit of the thickness of the moisture absorption liquid is selected from 1nm, 5nm, 10nm, 15nm, 20nm, 30nm, 40nm, 50nm, 60nm, 70nm, 80nm and 90 nm.

Optionally, the content of the acrylamide-acrylonitrile-acrylic acid terpolymer is 10 wt% to 30 wt% of the content of the hygroscopic solution.

Optionally, the content of the acrylamide-acrylonitrile-acrylic acid terpolymer is 15 wt%, 20 wt%, 25 wt% and 30 wt% of the upper limit of the content of the hygroscopic solution; the lower limit of the content of the acrylamide-acrylonitrile-acrylic acid terpolymer is 10 wt%, 15 wt%, 20 wt% and 25 wt% of the content of the moisture absorption liquid.

A preparation method of a degradable snack box packaging material comprises the following steps:

(1) adding room-temperature tap water into the reaction kettle, and then adding nano-scale sodium chloride until the nano-scale sodium chloride is completely dissolved to prepare a saturated sodium chloride solution;

(2) adding corn starch into a saturated sodium chloride solution, and stirring for 2-3 hours at the temperature of 30-60 ℃ to obtain a viscous liquid;

(3) adding acrylamide-acrylonitrile-acrylic acid terpolymer into the viscous liquid, raising the temperature of the reaction kettle to 60-80 ℃, continuously stirring until the terpolymer is completely dissolved, and cooling to obtain the hygroscopic solution;

(4) and adding the moisture absorption liquid to a coating machine, conventionally coating the front surface and the back surface of the food-grade degradable polyester non-woven fabric, and finally obtaining the packaging material for preventing the fried chips from softening and mildewing after drying.

Optionally, the specification of the food-grade degradable polyester non-woven fabric is 60-70 g/m²。

Optionally, the specification of the food-grade degradable polyester non-woven fabric is 65g/m²。

Optionally, the polymerization degree of the acrylamide-acrylonitrile-acrylic acid terpolymer is 10000-1000000.

Optionally, the polymerization degree of the acrylamide-acrylonitrile-acrylic acid terpolymer is 50000-60000.

Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:1 to 2:1 to 4.

Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:1: 1.

Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:2: 1.

Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:1: 2.

Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:1: 3.

Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:1: 4.

Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:2: 2.

Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:2: 3.

Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:2: 4.

Optionally, the mass ratio of the corn starch to the acrylamide-acrylonitrile-acrylic acid terpolymer is 1: 20-30.

Optionally, the mass ratio of the corn starch to the acrylamide-acrylonitrile-acrylic acid terpolymer is 1: 20.

Optionally, the mass ratio of the corn starch to the acrylamide-acrylonitrile-acrylic acid terpolymer is 1: 25.

Optionally, the mass ratio of the corn starch to the acrylamide-acrylonitrile-acrylic acid terpolymer is 1: 30.

Optionally, the particle size of the sodium chloride edible salt is 100-300 nm.

Optionally, the upper limit of the particle size of the sodium chloride edible salt is selected from 150nm, 200nm, 250nm and 300 nm; the lower limit of the particle size of the sodium chloride edible salt is selected from 100nm, 150nm, 200nm and 250 nm.

The degradable snack box packaging material is applied to disposable take-out packaging boxes.

Compared with the prior art, the invention has the advantages that: when the degradable snack box packaging material provided by the application is used for disposable take-away snack boxes, food is kept fresh within 1h, the taste is good, the prepared material can be fully degraded in natural environment, namely, the material can be degraded in the environment after being used for 3 months, the degraded material is a green and harmless substance, and the preparation method is simple and easy, green and environment-friendly, and is a safe and economic preparation process.

Detailed Description

In view of the deficiencies in the prior art, the inventors of the present invention have made extensive studies and extensive practices to provide technical solutions of the present invention. The technical solution, its implementation and principles, etc. will be further explained as follows.

A degradable snack box packaging material comprises food-grade degradable polyester non-woven fabrics and moisture absorption liquid coated on the surface of the non-woven fabrics,

the absorbent liquid comprises acrylamide-acrylonitrile-acrylic acid terpolymer absorbent resin.

Wherein the thickness of the hygroscopic solution is 1-100 nm.

Optionally, the upper limit of the thickness of the hygroscopic solution is selected from 5nm, 10nm, 15nm, 20nm, 30nm, 40nm, 50nm, 60nm, 70nm, 80nm, 90nm, 100 nm; the lower limit of the thickness of the moisture absorption liquid is selected from 1nm, 5nm, 10nm, 15nm, 20nm, 30nm, 40nm, 50nm, 60nm, 70nm, 80nm and 90 nm.

Optionally, the content of the acrylamide-acrylonitrile-acrylic acid terpolymer is 10 wt% to 30 wt% of the content of the hygroscopic solution.

Optionally, the content of the acrylamide-acrylonitrile-acrylic acid terpolymer is 15 wt%, 20 wt%, 25 wt% and 30 wt% of the upper limit of the content of the hygroscopic solution; the lower limit of the content of the acrylamide-acrylonitrile-acrylic acid terpolymer is 10 wt%, 15 wt%, 20 wt% and 25 wt% of the content of the moisture absorption liquid.

A preparation method of a degradable snack box packaging material comprises the following steps:

(1) adding room-temperature tap water into the reaction kettle, and then adding nano-scale sodium chloride until the nano-scale sodium chloride is completely dissolved to prepare a saturated sodium chloride solution;

(2) adding corn starch into a saturated sodium chloride solution, and stirring for 2-3 hours at the temperature of 30-60 ℃ to obtain a viscous liquid;

(3) adding acrylamide-acrylonitrile-acrylic acid terpolymer into the viscous liquid, raising the temperature of the reaction kettle to 60-80 ℃, continuously stirring until the terpolymer is completely dissolved, and cooling to obtain the hygroscopic solution;

(4) and adding the moisture absorption liquid to a coating machine, conventionally coating the front surface and the back surface of the food-grade degradable polyester non-woven fabric, and finally obtaining the packaging material for preventing the fried chips from softening and mildewing after drying.

Optionally, the specification of the food-grade degradable polyester non-woven fabric is 60-70 g/m²。

Optionally, the specification of the food-grade degradable polyester non-woven fabric is 65g/m²。

Optionally, the polymerization degree of the acrylamide-acrylonitrile-acrylic acid terpolymer is 10000-1000000.

Optionally, the polymerization degree of the acrylamide-acrylonitrile-acrylic acid terpolymer is 50000-60000.

Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:1 to 2:1 to 4.

Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:1: 1.

Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:2: 1.

Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:1: 2.

Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:1: 3.

Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:1: 4.

Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:2: 2.

Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:2: 3.

Optionally, the acrylamide-acrylonitrile-acrylic acid terpolymer has a molar weight ratio of acrylamide, acrylonitrile, and acrylic acid of 1:2: 4.

Optionally, the mass ratio of the corn starch to the acrylamide-acrylonitrile-acrylic acid terpolymer is 1: 20-30.

Optionally, the mass ratio of the corn starch to the acrylamide-acrylonitrile-acrylic acid terpolymer is 1: 20.

Optionally, the mass ratio of the corn starch to the acrylamide-acrylonitrile-acrylic acid terpolymer is 1: 25.

Optionally, the mass ratio of the corn starch to the acrylamide-acrylonitrile-acrylic acid terpolymer is 1: 30.

Optionally, the particle size of the sodium chloride edible salt is 100-300 nm.

Optionally, the upper limit of the particle size of the sodium chloride edible salt is selected from 150nm, 200nm, 250nm and 300 nm; the lower limit of the particle size of the sodium chloride edible salt is selected from 100nm, 150nm, 200nm and 250 nm.

The degradable snack box packaging material is applied to food packaging.

Optionally, the degradable snack box packaging material is applied to a take-away snack box.

The technical solution of the present invention is further explained below with reference to several examples.

Each of the substances in the examples is commercially available.

Example 1

A preparation method of a degradable snack box packaging material comprises the following steps:

(1) adding room-temperature tap water into the reaction kettle, and then adding nano-scale sodium chloride until the nano-scale sodium chloride is completely dissolved to prepare a saturated sodium chloride solution;

(2) adding corn starch into a saturated sodium chloride solution, and stirring for 2 h at the temperature of 30 ℃ to obtain a viscous liquid;

(3) adding acrylamide-acrylonitrile-acrylic acid terpolymer into the viscous liquid, raising the temperature of the reaction kettle to 60 ℃, continuously stirring until the terpolymer is completely dissolved, and cooling to obtain the hygroscopic solution;

(4) and adding the moisture absorption liquid to a coating machine, conventionally coating the front surface and the back surface of the food-grade degradable polyester non-woven fabric, and finally obtaining the packaging material for preventing the fried chips from softening and mildewing after drying.

The molar weight ratio of acrylamide, acrylonitrile and acrylic acid in the acrylamide-acrylonitrile-acrylic acid terpolymer is 1:1: 1.

Example 2

A preparation method of a degradable snack box packaging material comprises the following steps:

(1) adding room-temperature tap water into the reaction kettle, and then adding nano-scale sodium chloride until the nano-scale sodium chloride is completely dissolved to prepare a saturated sodium chloride solution;

(2) adding corn starch into saturated sodium chloride solution, and stirring for 3h at 40 ℃ to obtain viscous liquid;

(3) adding acrylamide-acrylonitrile-acrylic acid terpolymer into the viscous liquid, raising the temperature of the reaction kettle to 80 ℃, continuously stirring until the terpolymer is completely dissolved, and cooling to obtain the hygroscopic solution;

(4) and adding the moisture absorption liquid to a coating machine, conventionally coating the front surface and the back surface of the food-grade degradable polyester non-woven fabric, and finally obtaining the packaging material for preventing the fried chips from softening and mildewing after drying.

The molar weight ratio of acrylamide, acrylonitrile and acrylic acid in the acrylamide-acrylonitrile-acrylic acid terpolymer is 1:2: 1.

Example 3

A preparation method of a degradable snack box packaging material comprises the following steps:

(1) adding room-temperature tap water into the reaction kettle, and then adding nano-scale sodium chloride until the nano-scale sodium chloride is completely dissolved to prepare a saturated sodium chloride solution;

(2) adding corn starch into saturated sodium chloride solution, and stirring at 50 deg.C for 3 hr to obtain viscous liquid;

(3) adding acrylamide-acrylonitrile-acrylic acid terpolymer into the viscous liquid, raising the temperature of the reaction kettle to 80 ℃, continuously stirring until the terpolymer is completely dissolved, and cooling to obtain the hygroscopic solution;

(4) and adding the moisture absorption liquid to a coating machine, conventionally coating the front surface and the back surface of the food-grade degradable polyester non-woven fabric, and finally obtaining the packaging material for preventing the fried chips from softening and mildewing after drying.

The molar weight ratio of acrylamide, acrylonitrile and acrylic acid in the acrylamide-acrylonitrile-acrylic acid terpolymer is 1:1: 2.

Example 4

A preparation method of a degradable snack box packaging material comprises the following steps:

(1) adding room-temperature tap water into the reaction kettle, and then adding nano-scale sodium chloride until the nano-scale sodium chloride is completely dissolved to prepare a saturated sodium chloride solution;

(2) adding corn starch into saturated sodium chloride solution, and stirring for 3h at 60 ℃ to obtain viscous liquid;

(3) adding acrylamide-acrylonitrile-acrylic acid terpolymer into the viscous liquid, raising the temperature of the reaction kettle to 80 ℃, continuously stirring until the terpolymer is completely dissolved, and cooling to obtain the hygroscopic solution;

(4) and adding the moisture absorption liquid to a coating machine, conventionally coating the front surface and the back surface of the food-grade degradable polyester non-woven fabric, and finally obtaining the packaging material for preventing the fried chips from softening and mildewing after drying.

The molar weight ratio of acrylamide, acrylonitrile and acrylic acid in the acrylamide-acrylonitrile-acrylic acid terpolymer is 1:1: 3.

When the degradable snack box packaging materials prepared in the embodiments 1 to 4 are used for disposable take-away snack boxes, food can be kept fresh within 1 hour, the taste is good, and the prepared materials can be fully degraded in natural environment, namely can be degraded in the environment within 3 months after being used, and become green and harmless substances after being degraded.

It should be understood that the above-mentioned embodiments are merely illustrative of the technical concepts and features of the present invention, which are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and therefore, the protection scope of the present invention is not limited thereby. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.