阅读说明：本技术 一种纸箱增强剂 (Carton reinforcing agent ) 是由 袁善东 钟明良 汪彪 于 2020-12-29 设计创作，主要内容包括：本发明公开了一种纸箱增强剂,包括以下重量份数原料：季胺烷基醚1～3份、聚丙烯酰胺2～3份、单体50～60份、功能性单体5～10份、定若剂5～10份、非离子乳化剂1～2份、引发剂1～2份、四硼酸钠1～2份、纯碱5～10份。本发明应用到纸箱制造过程中可加强纤维层与层之间的连接力,减小纸板中存在的空隙,从而提高纸箱的挺度和环压强度,并防止纸箱受潮,即使纸箱具有一定的抗水性。(The invention discloses a carton reinforcing agent which comprises the following raw materials in parts by weight: 1-3 parts of quaternary amine alkyl ether, 2-3 parts of polyacrylamide, 50-60 parts of monomer, 5-10 parts of functional monomer, 5-10 parts of fixing agent, 1-2 parts of non-ionic emulsifier, 1-2 parts of initiator, 1-2 parts of sodium tetraborate and 5-10 parts of sodium carbonate. When the invention is applied to the manufacturing process of the carton, the connection force between the fiber layers can be enhanced, and the gaps in the carton can be reduced, thereby improving the stiffness and the ring crush strength of the carton, preventing the carton from being affected with damp, and even if the carton has certain water resistance.)

1. The carton reinforcing agent is characterized by comprising the following raw materials in parts by weight: 1-3 parts of quaternary amine alkyl ether, 2-3 parts of polyacrylamide, 50-60 parts of monomer, 5-10 parts of functional monomer, 5-10 parts of fixing agent, 1-2 parts of non-ionic emulsifier, 1-2 parts of initiator, 1-2 parts of sodium tetraborate and 5-10 parts of sodium carbonate.

2. The carton reinforcement of claim 1, wherein: the weight parts of the raw materials are as follows: 1.2-2.6 parts of quaternary amine alkyl ether, 2.2-2.8 parts of polyacrylamide, 52-58 parts of monomer, 6.2-8.6 parts of functional monomer, 5.6-8.8 parts of fixing agent, 1.3-1.8 parts of nonionic emulsifier, 1.2-1.8 parts of initiator, 1.2-1.8 parts of sodium tetraborate and 6-8 parts of sodium carbonate.

3. A carton reinforcement according to claim 1 or 2, characterized in that: the monomer comprises the following raw materials in parts by weight: 20-30 parts of hard monomer, 10-20 parts of soft monomer and 5-15 parts of cationic monomer.

4. A carton reinforcement according to claim 3, characterized in that: the hard monomer is at least one of acrylamide and vinyl acetate, the soft monomer is at least one of butyl acrylate and isooctyl acrylate, and the cationic monomer is acryloyloxyethyl trimethyl ammonium chloride.

5. A carton reinforcement according to claim 3, characterized in that: the functional monomer is at least one of MAA methacrylic acid or acrylamide.

6. The carton reinforcement of claim 1, wherein: the nonionic emulsifier is isomeric tridecanol polyoxyethylene ether.

7. The carton reinforcement of claim 1, wherein: the initiator is inorganic peroxide.

Technical Field

The invention relates to the technical field of carton manufacturing, in particular to a carton reinforcing agent.

Background

The packaging carton has the advantages of light weight, low price, no pollution, easy recycling and the like, and is widely used for packaging common and special products. The cardboard paper in China is generally made of straw pulp and waste paper pulp, and has the defects of poor stiffness, low ring crush strength, easy dampness and the like. On the other hand, if the paper is made from all wood pulp, the cost will be greatly increased.

The paperboard has a layered structure, is randomly arranged in a plane, is mutually staggered, is mainly oriented in two dimensions, is mainly connected between layers by intermolecular force and hydrogen bonds, and has fewer active points than the layers. The research shows that the apparent density of the paper is 0.6-0.7 g/cm³Approximately half the fiber density, i.e., approximately 50% of the sheet volume is fibers and 50% is voids, with a large amount of air being present between the layers of fibers. Therefore, to improve the stiffness and ring crush strength of the carton and to avoid moisture, it is necessary to improve the strength of the carton, i.e., to strengthen the bonding between fiber layers, and to add various reinforcing agents to achieve the purpose of strengthening the adsorption between fiber layers and between various particles by utilizing the chemical and physical bonding between the reinforcing agents and the fibers.

The reinforcing agent used in China at present mainly comprises starch, carboxymethyl starch, anionic starch, cationic starch, polyvinyl alcohol, carboxymethyl cellulose, vegetable gum, polyacrylamide polymer and the like, wherein the starch and modified products thereof have large application. Most of polyacrylamide is prepared by a sol polymerization method, generally only the tensile strength of paper is enhanced, and the effect on the ring crush strength is not obvious.

Disclosure of Invention

In view of the above-mentioned disadvantages, an object of the present invention is to provide a carton reinforcing agent which enhances the loop crush strength of a carton, improves the stiffness thereof, and prevents the carton from being affected with moisture.

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

the carton reinforcing agent comprises the following raw materials in parts by weight: 1-3 parts of quaternary amine alkyl ether, 2-3 parts of polyacrylamide, 50-60 parts of monomer, 5-10 parts of functional monomer, 5-10 parts of fixing agent, 1-2 parts of non-ionic emulsifier, 1-2 parts of initiator, 1-2 parts of sodium tetraborate and 5-10 parts of sodium carbonate.

Preferably, the raw materials comprise the following components in parts by weight: 1.2-2.6 parts of quaternary amine alkyl ether, 2.2-2.8 parts of polyacrylamide, 52-58 parts of monomer, 6.2-8.6 parts of functional monomer, 5.6-8.8 parts of fixing agent, 1.3-1.8 parts of nonionic emulsifier, 1.2-1.8 parts of initiator, 1.2-1.8 parts of sodium tetraborate and 6-8 parts of sodium carbonate.

Preferably, the monomer comprises the following raw materials in parts by weight: 20-30 parts of hard monomer, 10-20 parts of soft monomer and 5-15 parts of cationic monomer.

Preferably, the hard monomer is at least one of acrylamide and vinyl acetate, the soft monomer is at least one of butyl acrylate and isooctyl acrylate, and the cationic monomer is acryloyloxyethyl trimethyl ammonium chloride.

Preferably, the functional monomer is at least one of MAA methacrylic acid or acrylamide.

Preferably, the nonionic emulsifier is isomeric tridecanol polyoxyethylene ether.

Preferably, the initiator is an inorganic peroxide.

The invention has the beneficial effects that: the quaternary amine alkyl ether has strong cationic property, is suitable for a large pH range, is supplemented with polyacrylamide, and is added with a monomer, a functional monomer, a stabilizer, a nonionic emulsifier, an initiator, sodium tetraborate and soda ash as raw materials to prepare a reinforcing agent for the carton, so that the connection force between fiber layers is enhanced, and gaps in the carton are reduced, thereby improving the stiffness and the ring crush strength of the carton, preventing the carton from being affected with damp, and even if the carton has certain water resistance.

Detailed Description

In order to explain the technical content, the objects and the effects of the present invention in detail, the following description will be given in conjunction with the embodiments.

Example 1:

the carton reinforcing agent comprises the following raw materials in parts by weight: 1 part of quaternary amine alkyl ether, 2 parts of polyacrylamide, 50 parts of monomer, 5 parts of functional monomer, 5 parts of stabilizer, 1 part of nonionic emulsifier, 1 part of initiator, 1 part of sodium tetraborate and 5 parts of soda ash.

In this embodiment, the monomer includes the following raw materials in parts by weight: 20 parts of hard monomer, 10 parts of soft monomer and 5 parts of cationic monomer.

In this embodiment, the hard monomer is at least one of acrylamide and vinyl acetate, the soft monomer is at least one of butyl acrylate and isooctyl acrylate, and the cationic monomer is acryloyloxyethyl trimethyl ammonium chloride.

Further, the functional monomer is at least one of MAA methacrylic acid or acrylamide.

Further, the nonionic emulsifier is isomeric tridecanol polyoxyethylene ether.

In this example, the initiator is an inorganic peroxide.

Example 2:

the carton reinforcing agent comprises the following raw materials in parts by weight: 2.1 parts of quaternary amine alkyl ether, 2.6 parts of polyacrylamide, 55 parts of monomer, 7 parts of functional monomer, 6 parts of stabilizer, 1.6 parts of nonionic emulsifier, 1.4 parts of initiator, 1.4 parts of sodium tetraborate and 7 parts of soda ash.

Further, the monomer comprises the following raw materials in parts by weight: 14 parts of hard monomer, 16 parts of soft monomer and 10 parts of cationic monomer.

Example 3:

the carton reinforcing agent comprises the following raw materials in parts by weight: 3 parts of quaternary amine alkyl ether, 3 parts of polyacrylamide, 60 parts of monomer, 10 parts of functional monomer, 10 parts of stabilizer, 2 parts of nonionic emulsifier, 2 parts of initiator, 2 parts of sodium tetraborate and 10 parts of soda ash.

Further, the monomer comprises the following raw materials in parts by weight: 30 parts of hard monomer, 20 parts of soft monomer and 15 parts of cationic monomer.

The reinforcing agent disclosed by the invention is combined with hydroxyl groups rich in paperboard fibers to form hydrogen bonds, so that the connection among all fiber layers is enhanced, and an interpenetrating network is formed, thereby enhancing the stiffness and ring crush strength of the carton, and enabling the carton to have certain moisture resistance.

Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention.