1. The high-performance wireless book hot melt adhesive is characterized by comprising the following raw materials in parts by weight: 20-50 parts of EVA, 20-60 parts of tackifier, 10-20 parts of lubricant, 1-10 parts of plasticizer, 0.1-1 part of antioxidant, 1-10 parts of sodium carboxymethylcellulose, 1-10 parts of ethylene bis stearamide and 0.1-1 part of brightener.

2. The high performance wireless book-binding hot melt adhesive of claim 1, wherein the EVA is composed of EVA710, EVA722, and EVA 750.

3. The high-performance wireless book binding hot melt adhesive according to claim 2, wherein the mass ratio of the EVA710 to the EVA722 to the EVA750 is 1-2: 1-2.

4. The high-performance wireless book-binding hot melt adhesive according to claim 1, wherein the tackifier is one or both of rosin modified resin and petroleum resin.

5. The high performance cordless book-top hot melt adhesive of claim 1, wherein said lubricant is one or more of a fully refined paraffin wax, a polyethylene wax and a fischer-tropsch wax.

6. The high performance no-wire book wrap hot melt adhesive of claim 1, wherein said plasticizer is polyisobutylene.

7. The high-performance wireless book binding hot melt adhesive according to claim 1, wherein the antioxidant is pentaerythritol tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ].

8. The high performance wireless book-binding hot melt adhesive according to claim 1, wherein the whitening agent is titanium dioxide.

9. The preparation method of the high-performance wireless book-binding hot melt adhesive according to any one of claims 1 to 8, characterized by comprising the following steps:

(1) weighing the raw materials in proportion;

(2) adding the lubricant into a reaction kettle, heating to 150-170 ℃, and stirring until the lubricant is completely dissolved;

(3) then sequentially adding EVA, a tackifier, a plasticizer, an antioxidant, sodium carboxymethylcellulose, ethylene bis stearamide and a whitening agent, and stirring for 2-3 hours until the materials are completely dissolved;

(4) stirring and mixing evenly, extruding and molding, and discharging.

Background

The hot melt adhesive is an adhesive which is heated, melted and applied with glue and can be quickly bonded at room temperature. The hot melt adhesive using polyester as the matrix has the advantages of good thermal stability, chemical corrosion resistance, good insulating property, no public nuisance and the like, and is widely applied to the industries of packaging, binding, shoemaking and the like.

The prior art is used for the hot melt adhesive that books and periodicals were bound and mostly uses EVA as the base resin, for example, Chinese patent CN109609058A provides a crosslinking type EVA hot melt adhesive, it provides a can low temperature press and scald, and heat resistance and bonding effect better crosslinking type EVA hot melt adhesive, this hot melt adhesive comprises low melting finger type EVA hot melt adhesive, high melting finger type EVA hot melt adhesive and meteorological silica, though it has improved heat resistance and adhesiveness of traditional EVA hot melt adhesive, but this crosslinking type EVA hot melt adhesive has the problem that low temperature fragility is low and easily peel off for books and periodicals are bound. And the hot melt adhesive used for book binding at present has the defects of low bonding strength, low-temperature brittleness, empty glue on the back of a book, short service life and the like. Therefore, the development of a wireless book-cover hot melt adhesive with excellent performance is not slow.

Disclosure of Invention

In view of the above, the invention provides a high-performance wireless book-binding hot melt adhesive, which is low in price of raw materials and low in cost, wherein the porosity and brittleness of the hot melt adhesive are improved by adding sodium carboxymethyl cellulose as a modifier, the cohesive strength of an adhesive layer is enhanced, and the wear resistance, high temperature, luster and adhesive force of the book-binding hot melt adhesive are improved by adding ethylene bis stearamide as a dispersing agent, so that the hot melt adhesive has wider application.

The high-performance wireless book hot melt adhesive prepared by the invention comprises the following raw materials: 20-50 parts of EVA, 20-60 parts of tackifier, 10-20 parts of lubricant, 1-10 parts of plasticizer, 0.1-1 part of antioxidant, 1-10 parts of sodium carboxymethylcellulose, 1-10 parts of ethylene bis stearamide and 0.1-1 part of brightener.

Preferably, the EVA is composed of EVA710, EVA722, and EVA 750.

Preferably, the mass ratio of the EVA710 to the EVA722 to the EVA750 is 1-2: 1-2.

Preferably, the tackifier is one or two of rosin modified resin and petroleum resin.

Preferably, the lubricant is one or more of a fully refined paraffin wax, a polyethylene wax and a fischer-tropsch wax.

Preferably, the plasticizer is polyisobutylene.

Preferably, the antioxidant is pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ].

Preferably, the whitening agent is titanium dioxide.

The preparation method of the high-performance wireless book-binding hot melt adhesive comprises the following steps:

(1) weighing the raw materials in proportion;

(2) adding the lubricant into a reaction kettle, heating to 150-170 ℃, and stirring until the lubricant is completely dissolved;

(3) then sequentially adding EVA, a tackifier, a plasticizer, an antioxidant, sodium carboxymethylcellulose, ethylene bis stearamide and a whitening agent, and stirring for 2-3 hours to completely dissolve the materials;

(4) stirring and mixing evenly, extruding and molding, and discharging.

The sodium carboxymethyl cellulose is a derivative with an ether structure obtained by chemically modifying natural cellulose, and the porosity and brittleness of the hot melt adhesive can be greatly improved by utilizing the fiber structure of the sodium carboxymethyl cellulose to be blended into the colloid. According to the invention, sodium carboxymethylcellulose is used as a modifier, so that the cohesive strength of the adhesive layer can be enhanced.

Polar amide groups exist in Ethylene Bis Stearamide (EBS) molecules, can be inserted into polymer resin, reduce the interaction among molecules, and play a role of a lubricant, so that the glue has better wettability and the adhesive force of the glue is improved; EBS can migrate from the inside of the resin melt to the surface, so that the friction among particles is reduced, the glossiness of the colloid surface is improved, and the EBS has higher melting point and structural stability. The ethylene bis stearamide is used as a dispersing agent and is matched with an antioxidant, so that the heat resistance and weather resistance of the colloid can be greatly improved, and the stability of the colloid is improved; and due to the addition of the EBS, better compatibility is increased among colloid molecules, and the overall wear resistance of the colloid is improved.

Compared with the prior art, the invention has the following beneficial effects:

the high-performance wireless book hot melt adhesive provided by the invention comprises EVA, a tackifier, a lubricant, a plasticizer, an antioxidant, sodium carboxymethylcellulose, ethylene bis stearamide and a whitening agent, and has the advantages of low price of raw materials and 2-3 times lower cost than the traditional hot melt adhesive.

According to the invention, sodium carboxymethylcellulose is used as a modifier, so that the porosity and brittleness of the hot melt adhesive can be greatly improved, and the cohesive strength of the adhesive layer is enhanced; the ethylene bis stearamide is added as a dispersing agent, so that the wear resistance, high temperature property, gloss and adhesive force of the book hot melt adhesive can be improved, and the book hot melt adhesive is high in bonding strength, low temperature resistant, few in bubbles and long in service life, so that the hot melt adhesive has wider application.

Detailed Description

The invention provides a high-performance wireless book-binding hot melt adhesive, which comprises the following raw materials: 20-50 parts of EVA, 20-60 parts of tackifier, 10-20 parts of lubricant, 1-10 parts of plasticizer, 0.1-1 part of antioxidant, 1-10 parts of sodium carboxymethylcellulose, 1-10 parts of ethylene bis stearamide and 0.1-1 part of brightener.

In the examples of the present invention, EVA consists of EVA710, EVA722, and EVA750, where the VA content in EVA710 is 28%, and the melt index is 18; the EVA722 has VA content of 28% and melt index of 400; EVA750 has a VA content of 32% and a melt index of 30.

In the embodiment of the invention, the rosin modified resin is purchased from Guangdong Ke Maolin chemical industry Co., Ltd, and has the model number of KA 146; petroleum resins are available from Heng materials science and technology, Inc. under the model number HM-1000.

The present invention will be further described with reference to the following examples.

Example 1

A high-performance wireless book hot melt adhesive is composed of the following raw materials in parts by weight:

EVA71015 parts, EVA72213 parts, EVA75010 parts, rosin modified resin 20 parts, petroleum resin 18 parts, fully refined paraffin 11 parts, polyethylene wax 2 parts, Fischer-Tropsch wax 3 parts, polyisobutylene 4 parts, tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester 0.3 part, sodium carboxymethylcellulose 2 parts, ethylene bis stearamide 2 parts, and titanium dioxide 0.4 part.

The preparation method of the high-performance wireless book-binding hot melt adhesive comprises the following steps:

(1) weighing the raw materials according to the weight ratio;

(2) adding the fully refined paraffin, the polyethylene wax and the Fischer-Tropsch wax into a reaction kettle, heating to 170 ℃, and stirring until the fully refined paraffin, the polyethylene wax and the Fischer-Tropsch wax are completely dissolved;

(3) then sequentially adding EVA, rosin modified resin, petroleum resin, polyisobutylene, antioxidant, sodium carboxymethylcellulose, ethylene bis stearamide and titanium dioxide, and stirring for 2 hours to completely dissolve the materials;

(4) and after all the materials are stirred and mixed uniformly, extruding, molding and discharging.

Example 2

A high-performance wireless book hot melt adhesive is composed of the following raw materials in parts by weight:

EVA71014 parts, EVA72211 parts, EVA75015 parts, rosin modified resin 15 parts, petroleum resin 18 parts, fully refined paraffin 12 parts, polyethylene wax 2 parts, Fischer-Tropsch wax 4 parts, polyisobutylene 4 parts, pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] 0.4 part, sodium carboxymethylcellulose 3 parts, ethylene bis stearamide 2 parts, and titanium dioxide 0.4 part.

The preparation method of the high-performance wireless book-binding hot melt adhesive comprises the following steps:

(1) weighing the raw materials according to the weight ratio;

(2) adding the fully refined paraffin, the polyethylene wax and the Fischer-Tropsch wax into a reaction kettle, heating to 170 ℃, and stirring until the fully refined paraffin, the polyethylene wax and the Fischer-Tropsch wax are completely dissolved;

(3) then sequentially adding EVA, rosin modified resin, petroleum resin, polyisobutylene, antioxidant, sodium carboxymethylcellulose, ethylene bis stearamide and titanium dioxide, and stirring for 2 hours to completely dissolve the materials;

(4) and after all the materials are stirred and mixed uniformly, extruding, molding and discharging.

Example 3

A high-performance wireless book hot melt adhesive is composed of the following raw materials in parts by weight:

EVA71012 parts, EVA72210 parts, EVA75016 parts, rosin modified resin 18 parts, petroleum resin 17 parts, fully refined paraffin 10 parts, polyethylene wax 3 parts, Fischer-Tropsch wax 3 parts, polyisobutylene 5 parts, tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester 0.4 part, sodium carboxymethylcellulose 3.5 parts, ethylene bis stearamide 2.5 parts, and titanium dioxide 0.4 part.

The preparation method of the high-performance wireless book-binding hot melt adhesive comprises the following steps:

(1) weighing the raw materials according to the weight ratio;

(2) adding the fully refined paraffin, the polyethylene wax and the Fischer-Tropsch wax into a reaction kettle, heating to 170 ℃, and stirring until the fully refined paraffin, the polyethylene wax and the Fischer-Tropsch wax are completely dissolved;

(3) then sequentially adding EVA, rosin modified resin, petroleum resin, polyisobutylene, antioxidant, sodium carboxymethylcellulose, ethylene bis stearamide and titanium dioxide, and stirring for 2 hours to completely dissolve the materials;

(4) and after all the materials are stirred and mixed uniformly, extruding, molding and discharging.

Comparative examples 1 to 6

The book back glue is prepared as comparative examples 1 to 6 according to example 1 of application No. 201210374417.5 book back glue and a production method thereof.

The performance tests of the high-performance wireless book-packed hot melt adhesives prepared in the embodiments 1 to 3 are carried out, and the test results are shown in table 1.

TABLE 1

And (3) carrying out performance test on the high-performance wireless book-packed hot melt adhesives prepared in the comparison ratios of 1-6, wherein the test results are shown in Table 2.

TABLE 2

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.