A kind of water-based spray adhesive specially used for luggage and its preparation method

Abstract

The present invention discloses a water-based spray adhesive for bags and a preparation method thereof. The water-based spray adhesive comprises a main material and an auxiliary agent, wherein the main material comprises 50 to 100 parts by weight of water-based SIS latex, 50 to 100 parts by weight of acrylic emulsion, and 75 to 100 parts by weight of water-based tackifying resin emulsion; the auxiliary agent comprises 1.5 to 2.0 parts by weight of an environmentally friendly plasticizer, 1.0 to 2.0 parts by weight of a thickener, 0.5 to 2.0 parts by weight of a stabilizer, 0.5 to 1.0 parts by weight of a defoamer, and 2.0 parts by weight of a drying agent. It can be seen from the present invention that the thickener in the present invention can produce good compatibility with the water-based SIS latex, thereby greatly reducing the permeability of the glue. In addition, the water-based terpene resin and the plasticizer can work together with the SIS latex to effectively improve the open time performance of the product.

Description

Technical Field

[0001] The invention relates to a water-based spray adhesive special for bags and a preparation method thereof. Background Art

[0002] The spray glue used for bags is a type of adhesive that is sprayed on the surface of sponges, leather, cloth and other materials to play a bonding role. At present, the spray glue used in the market for making bags is mainly organic solvent-based spray glue. Organic solvent-based spray glue uses organic solvents as dispersion media and diluents. Organic solvents are easy to volatilize and spread into the air to pollute the environment. Some products contain toxic and harmful solvents such as benzene and ethylene dichloride, which are harmful to people's health. Water-based spray glue is mainly water-based chloroprene, which has a short open time and high raw material cost. The rapid spraying and bonding performance of water-based spray glue is not as good as that of solvent-based spray glue, and its short open time limits its application range.

[0003] Water-based spray adhesive for bags is mainly used for bonding materials such as sponges, leather, cloth, and foam, especially for the hem bonding of leather and leather, and cloth and cloth, which requires strong adhesion and a certain open time. The main problems of spray adhesive on the market are as follows:

[0004] 1. When water-based spray glue is sprayed on the fabric, due to the presence of some holes in the fabric, the water-based glue evaporates slowly, and it is easy for the glue to penetrate into the other side of the fabric, affecting the appearance of the finished bag;

[0005] 2. The cost of water-based spray adhesive is high, and the purchasing cost of end users increases significantly, which directly affects the economic benefits of luggage manufacturers;

[0006] 3. The water-based spray adhesive currently used for luggage on the market has a short open time, with a bonding time of only a dozen minutes, which cannot meet the operating process of mass production in the luggage industry and affects work efficiency.

[0007] In summary, the current defects of water-based spray adhesives, such as glue seepage, high cost, and short open time, have greatly limited the use of water-based spray adhesives in the luggage industry. Summary of the invention

[0008] In view of this, in order to overcome the problems existing in the existing spray adhesive on the market, the present invention proposes a water-based spray adhesive specifically for bags.

[0009] In order to solve the above technical problems, the present invention adopts the following technical solutions to achieve the above problems:

[0010] The water-based spray adhesive for bags and suitcases of the present invention uses water-based SIS latex, acrylic emulsion, water-based tackifying resin and the like as main raw materials, and is added with environmentally friendly plasticizers, thickeners, stabilizers, defoamers, special-effect drying agents and other auxiliary agents. The production process is divided into two steps, namely, obtaining the required water-based spray adhesive for bags and suitcases.

[0011] 1) Preparation of composite emulsion: SIS latex, acrylic emulsion, and water-based tackifying resin are added to a reaction device respectively, and the dispersion speed is controlled at 200-500 r / min and the dispersion time is 30 minutes. Then, part of deionized water is added, and the dispersion speed is controlled at 100-300 r / min and the dispersion time is 60 minutes. The composite emulsion is prepared after uniform dispersion.

[0012] 2) Preparation of water-based spray adhesive: Add environmentally friendly plasticizers, thickeners, stabilizers, defoamers, special-effect drying agents and other additives to the composite emulsion, control the dispersion speed to 200-500r / min, and the dispersion time to 30 minutes; the water-based spray adhesive for luggage is obtained after uniform dispersion, and then add a small amount of deionized water to adjust according to the different viscosity requirements of customers, and control the dispersion speed to 100-300r / min when adding and adjusting.

[0013] The aqueous SIS latex is preferably an anionic aqueous emulsion, such as 1105, 1106, etc., with a solid content of 45-55% and a viscosity of 100-300 mPa.s / 25°C.

[0014] The acrylic emulsion preferably has a solid content of 45-55% and a viscosity of 200-300 mPa.s / 25°C.

[0015] The aqueous tackifying resin preferably has a solid content of 45-55% and a viscosity of 300-500 mPa.s / 25°C.

[0016] The environmentally friendly plasticizer is a benzoate plasticizer, preferably BL706, with a purity of 95%-98%.

[0017] The water-based tackifying resin is selected from water-based rosin resin, water-based terpene phenolic resin, and water-based alkyl phenolic resin.

[0018] The stabilizer is preferably aqueous nano magnesium oxide or aqueous nano zinc oxide.

[0019] The thickener is preferably gum arabic or polyacrylamide.

[0020] The defoaming agent is preferably silicone polyether, silicone resin, or dimethyl polysiloxane.

[0021] The special effect drier is preferably an organotin drier.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The product has good anti-penetration properties. This product has good compatibility with SIS latex by adding thickeners. After the glue is sprayed, the glue layer will not penetrate to the other side of the material after solidification on the surface of the material. It is particularly suitable for soft materials with large pores to achieve good anti-penetration effects.

[0024] 2. Excellent open time performance: This product uses SIS latex as the main material, and by adding thickeners, plasticizers and other additives, it effectively improves the open time performance of the product, and can maintain strong viscosity for a long time, meeting the process requirements of the luggage industry. For oily leather and imitation leather materials, it has excellent initial adhesion and final adhesion, and improves the curvature adhesion firmness and stability between leather and sponge.

[0025] 3. High cost performance: This product synthesizes composite emulsion to prepare an emulsion with good compatibility with SIS latex and excellent performance, which can replace the high-priced chloroprene latex and enhance the competitiveness of the product. It solves the problem of high price of water-based chloroprene adhesive.

[0026] 4. The product has moderate viscosity and can be used for both spraying and brushing. It can meet the construction process requirements of different manufacturers, ensuring a wide range of product applications. It improves the defect that the current water-based chloroprene adhesive is only suitable for construction with a spray gun, and avoids the spraying process being affected by air pressure, which easily generates mist and affects the construction environment.

[0027] 5. The product can meet the HJ2541-2016 Environmental Labeling Certification Standard (Ten-Ring Product Certification Standard), has a low total volatile organic compound content, can meet European environmental protection standards, and complies with ROHS and REACH certification. DETAILED DESCRIPTION

[0028] In order to allow those skilled in the art to understand the present invention more clearly and intuitively, the present invention will be further described below.

[0029] The water-based spray adhesive for bags and suitcases of the present invention uses water-based SIS latex, acrylic emulsion, water-based tackifying resin and the like as main raw materials, and is added with environmentally friendly plasticizers, thickeners, stabilizers, defoamers, special-effect drying agents and other auxiliary agents. The production process is divided into two steps, namely, obtaining the required water-based spray adhesive for bags and suitcases.

[0030] 1) Preparation of composite emulsion: SIS latex, acrylic emulsion, and water-based tackifying resin are added to a reaction device respectively, and the dispersion speed is controlled at 200-500 r / min and the dispersion time is 30 minutes. Then, part of deionized water is added, and the dispersion speed is controlled at 100-300 r / min and the dispersion time is 60 minutes. The composite emulsion is prepared after uniform dispersion.

[0031] 2) Preparation of water-based spray adhesive: Add environmentally friendly plasticizers, thickeners, stabilizers, defoamers, special-effect drying agents and other additives to the composite emulsion, control the dispersion speed to 200-500r / min, and the dispersion time to 30 minutes; the water-based spray adhesive for luggage is obtained after uniform dispersion, and then add a small amount of deionized water to adjust according to the different viscosity requirements of customers, and control the dispersion speed to 100-300r / min when adding and adjusting.

[0032] The aqueous SIS latex is preferably an anionic aqueous emulsion of the SIS type, such as Motian Chemical S1105, S1105A, etc., with a solid content of 45-55% and a viscosity of 100-300mpa.s / 25°C. The acrylic emulsion is preferably a solid content of 45-55% and a viscosity of 200-300mpa.s / 25°C. The aqueous tackifying resin is preferably a solid content of 45-55% and a viscosity of 300-500mpa.s / 25°C. The environmentally friendly plasticizer is a benzoate plasticizer, preferably BL706 of Jinjia New Materials, with a content of 95%-98%. The aqueous tackifying resin is preferably an aqueous rosin resin, an aqueous terpene phenolic resin, and an aqueous alkyl phenolic resin. The stabilizer is preferably an aqueous nano magnesium oxide and an aqueous nano zinc oxide from Japan's Shendao. The thickener is preferably gum arabic and polyacrylamide. The defoamer is preferably silicone polyether, silicone resin, and dimethyl polysiloxane. The special effect drier is preferably an organotin drier.

[0033] The compositions of the water-based spray adhesives for bags and suitcases of Examples 1 to 3 and Comparative Examples 1 to 3 are shown in Table 1.

[0034] Table 1

[0035]

[0036] The production process of the water-based spray adhesive for bags in each embodiment and comparative example is divided into two steps:

[0037] 1) Preparation of composite emulsion: SIS latex, acrylic emulsion, and water-based tackifying resin were added to the reaction device respectively, and the dispersion speed was controlled to 500 r / min, and the dispersion time was 30 minutes. Then, part of deionized water was added, and the dispersion speed was controlled to 300 r / min, and the dispersion time was 60 minutes. The composite emulsion was prepared after uniform dispersion.

[0038] 2) Preparation of water-based spray adhesive: Add environmentally friendly plasticizers, thickeners, stabilizers, defoamers, special drying agents and other additives to the composite emulsion, control the dispersion speed to 500r / min, and the dispersion time to 30 minutes. Disperse evenly to obtain the water-based spray adhesive for luggage, and then add a small amount of deionized water to adjust the viscosity according to the different needs of customers. When adding materials, control the dispersion speed to 100-300r / min.

[0039] Note: The preparation method of the comparative example is the same as the preparation method of the embodiment except that the dosage of some components is different and some components are missing and not added.

[0040] The performance test results of the products prepared according to the above examples are shown in Table 2:

[0041] Table 2

[0042]

[0043] The test results of various properties of the products prepared according to the above comparative examples are shown in Table 3:

[0044] Table 3

[0045]

[0046] By comparing the examples and comparative examples, it can be seen that the thickener in the present invention can produce good compatibility with the water-based SIS latex, thereby greatly reducing the permeability of the glue. In addition, the water-based terpene resin and the plasticizer can work together with the SIS latex to effectively improve the open time performance of the product.

[0047] The above description of the embodiments is to facilitate the understanding and application of the present invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the embodiments herein, and improvements and modifications made to the present invention by those skilled in the art based on the disclosure of the present invention should be within the scope of protection of the present invention.

Claims

1. A water-based spray adhesive for bags, characterized in that: It includes main ingredients and auxiliary agents, among which, The main ingredients include 50-100 parts by weight of aqueous SIS latex, 50-100 parts by weight of acrylic emulsion, and 75-100 parts by weight of aqueous tackifying resin; The auxiliary agent includes 1.5-2.0 parts by mass of a benzoate plasticizer, 1.0-2.0 parts by mass of a thickener, 0.5-2.0 parts by mass of a stabilizer, 0.5-1.0 parts by mass of a defoamer, and 2.0 parts by mass of a drying agent; The water-based SIS latex is an anionic water-based emulsion with a solid content of 45-55% and a viscosity of 100-300 mpa.s / 25°C; the acrylic emulsion has a solid content of 45-55% and a viscosity of 200-300 mpa.s / 25°C; The thickener is gum arabic; The solid content of the aqueous tackifying resin is 45-55%, and the viscosity is 300-500 mPa.s / 25°C.

2. The water-based spray adhesive for bags as claimed in claim 1, characterized in that: The purity content of the benzoate plasticizer is 95%-98%.

3. The water-based spray adhesive for bags as claimed in claim 1, characterized in that: The water-based tackifying resin is at least one of a water-based rosin resin, a water-based terpene phenolic resin, and a water-based alkylphenolic resin.

4. The water-based spray adhesive for bags as claimed in claim 1, characterized in that: The stabilizer is aqueous nano magnesium oxide or aqueous nano zinc oxide.

5. The water-based spray adhesive for bags as claimed in claim 1, characterized in that: The defoaming agent is silicone polyether, silicone resin or dimethyl polysiloxane; The drier is an organotin drier.

6. The method for preparing the water-based spray adhesive for bags according to any one of claims 1 to 5, characterized in that: There are two steps: 1) Preparation of composite emulsion: SIS latex, acrylic emulsion and water-based tackifying resin were added to the reaction device respectively, the dispersion speed was controlled at 200-500 r / min, the dispersion time was 30 minutes, and then part of deionized water was added, the dispersion speed was controlled at 100-300 r / min, the dispersion time was 60 minutes, and the composite emulsion was prepared after uniform dispersion; 2) Preparation of water-based spray adhesive: Add environmentally friendly plasticizer, thickener, stabilizer, defoamer, special-effect drying agent to the composite emulsion, control the dispersion speed to 200~500r / min, and the dispersion time to 30 minutes; After uniform dispersion, add deionized water to adjust the viscosity, and control the dispersion speed at 100~300r / min during adjustment.

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