Preparation method of self-adhesion reinforced glass fiber composite coated board paper

Abstract

The invention provides a preparation method of self-adhesion reinforced glass fiber composite coated board paper, and relates to the field of glass fiber coated board paper. The preparation method of the self-adhesive reinforced glass fiber composite coated board paper comprises the following steps: selecting two glass fibers with relatively large glass-transition temperature difference, taking the glass fiber with high glass-transition temperature as a main body material, taking the glass fiber with low glass-transition temperature as an auxiliary material, and preparing the self-adhesive reinforced glass fiber composite coated board paper. Weighing the main material and the auxiliary material according to the mass ratio of (4-6): 1; fully and uniformly mixing the main body material and the auxiliary material, and molding and drying the mixture to obtain a coated board paper precursor; the coated paper precursor is subjected to heat treatment, the heat treatment temperature is higher than the glass transition temperature of the auxiliary material but lower than the softening point over-high temperature of the auxiliary material, and the auxiliary material is softened and bonded with the main body material. According to the invention, the proportion of the glass fiber material is optimized, bonding is realized by utilizing the characteristics of the glass material, and the mechanical property of the coated paper is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of glass fiber coated paper, in particular to a method for preparing self-adhesive reinforced glass fiber composite coated paper. Background Art

[0002] Glass transition temperature (Tg) refers to the temperature corresponding to the transition from glassy state to highly elastic state. Glass transition is an inherent property of amorphous polymer materials and a macroscopic manifestation of the change in the form of polymer motion. It directly affects the performance and process performance of the material. Therefore, it has long been the main content of polymer physics research. Glass transition temperature (Tg) is the lowest temperature at which molecular chain segments can move. Its level is directly related to the flexibility of the molecular chain. The greater the flexibility of the molecular chain, the lower the glass transition temperature; the greater the rigidity of the molecular chain, the higher the glass transition temperature.

[0003] In the prior art, there are similar products on the market that use the strategy of constructing bonding points between fibers. However, most products use the method of adding a binder to create bonding points between glass fibers. This method has significant drawbacks because the organic binder used is easily aged in an acid solution, which will greatly shorten the service life of the coated paper and cannot meet the needs of long-term stable use. Therefore, a new method is urgently needed to prepare glass fiber composite coated paper to overcome the shortcomings of the prior art. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a method for preparing a self-adhesive reinforced glass fiber composite coated paper, which solves the problems raised by the above-mentioned background technology.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented by the following technical scheme: A method for preparing a self-adhesive reinforced glass fiber composite coated paper comprises the following steps:

[0008] Step 1: Material selection:

[0009] Select two glass fibers with greatly different glass transition temperatures, use the glass fiber with high glass transition temperature as the main material, and use the glass fiber with low glass transition temperature as the auxiliary material, and weigh the main material and the auxiliary material in a mass ratio of 4-6:1;

[0010] Step 2: Coated paper preparation:

[0011] The main material and the auxiliary material are fully mixed, and then formed and dried to obtain a coated paper precursor;

[0012] Step 3: Heat treatment bonding:

[0013] The coated paper precursor is heat treated at a temperature higher than the glass transition temperature of the auxiliary material but lower than the excessive temperature of its softening point, so that the auxiliary material softens and bonds with the main material to prepare a self-bonding reinforced glass fiber composite coated paper.

[0014] Preferably, in step 1, the main material is quartz glass fiber, and its glass transition temperature is 1000-1100°C; the auxiliary material is silicone-modified glass fiber, and its glass transition temperature is 300-400°C.

[0015] Preferably, in step 1, the main material is high-silica glass fiber, and its glass transition temperature is 900-1000°C; the auxiliary material is silicone-modified glass fiber, and its glass transition temperature is 300-400°C.

[0016] Preferably, in step one, the main material is aluminoborosilicate glass fiber, and its glass transition temperature is 700-800°C; the auxiliary material is organosilicon-modified glass fiber, and its glass transition temperature is 300-400°C.

[0017] Preferably, in step 2, the drying temperature is 60-80° C., and the drying time is 1-1.5 hours.

[0018] Preferably, in step three, the heat treatment temperature is 400-450° C., and the heat treatment time is 1-2 hours.

[0019] Preferably, the method further comprises selecting appropriate glass fibers and chemical fibers for mixing and heat treatment to prepare a composite material.

[0020] (III) Beneficial effects

[0021] The present invention provides a method for preparing a self-adhesive reinforced glass fiber composite coated paper. It has the following beneficial effects:

[0022] 1. The present invention avoids the use of organic binders, thereby overcoming the problem that organic binders are easily aged in acid solutions and significantly prolonging the service life of coated paper.

[0023] 2. By selecting appropriate glass fiber materials and optimizing the ratio, the characteristics of the glass material itself are used to achieve bonding, which effectively improves the mechanical properties of the coated paper. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic flow chart of the preparation method of the present invention. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Embodiment 1:

[0027] like Figure 1 As shown, an embodiment of the present invention provides a method for preparing a self-adhesive reinforced glass fiber composite coated paper, comprising the following steps:

[0028] Step 1: Material selection:

[0029] Select two glass fibers with greatly different glass transition temperatures, use the glass fiber with high glass transition temperature as the main material, and use the glass fiber with low glass transition temperature as the auxiliary material, and weigh the main material and the auxiliary material in a mass ratio of 4:1;

[0030] Specifically, the main material is quartz glass fiber, whose glass transition temperature is 1000°C; the auxiliary material is silicone-modified glass fiber, whose glass transition temperature is 400°C;

[0031] Step 2: Coated paper preparation:

[0032] The main material and the auxiliary material are fully mixed, and then formed and dried to obtain a coated paper precursor;

[0033] Specifically, the drying temperature is 60° C., and the drying time is 1 hour.

[0034] Step 3: Heat treatment bonding:

[0035] The coated paper precursor is heat treated at a temperature higher than the glass transition temperature of the auxiliary material but lower than the excessive temperature of its softening point, so that the auxiliary material softens and bonds with the main material to prepare a self-bonding reinforced glass fiber composite coated paper.

[0036] Specifically, the heat treatment temperature is 420° C., and the heat treatment time is 1 hour.

[0037] Embodiment 2:

[0038] The difference between this embodiment and embodiment 1 is that: in step 1, the main material and auxiliary material are weighed in a mass ratio of 6:1; in step 2, the drying temperature is 80°C and the drying time is 1.5 hours; in step 3, the heat treatment temperature is 450°C and the heat treatment time is 2 hours.

[0039] Embodiment three:

[0040] like Figure 1 As shown, an embodiment of the present invention provides a method for preparing a self-adhesive reinforced glass fiber composite coated paper, comprising the following steps:

[0041] Step 1: Material selection:

[0042] Select two glass fibers with greatly different glass transition temperatures, use the glass fiber with high glass transition temperature as the main material, and use the glass fiber with low glass transition temperature as the auxiliary material, and weigh the main material and the auxiliary material in a mass ratio of 4:1;

[0043] Specifically, the main material is high-silica glass fiber, whose glass transition temperature is 900°C; the auxiliary material is organosilicon-modified glass fiber, whose glass transition temperature is 400°C;

[0044] Step 2: Coated paper preparation:

[0045] The main material and the auxiliary material are fully mixed, and then formed and dried to obtain a coated paper precursor;

[0046] Specifically, the drying temperature is 60° C., and the drying time is 1 hour.

[0047] Step 3: Heat treatment bonding:

[0048] The coated paper precursor is heat treated at a temperature higher than the glass transition temperature of the auxiliary material but lower than the excessive temperature of its softening point, so that the auxiliary material softens and bonds with the main material to prepare a self-bonding reinforced glass fiber composite coated paper.

[0049] Specifically, the heat treatment temperature is 420° C., and the heat treatment time is 1 hour.

[0050] Embodiment 4:

[0051] The difference between this embodiment and embodiment three is that: in step one, the main material and auxiliary material are weighed in a mass ratio of 6:1; in step two, the drying temperature is 80°C and the drying time is 1.5 hours; in step three, the heat treatment temperature is 450°C and the heat treatment time is 2 hours.

[0052] Embodiment five:

[0053] like Figure 1 As shown, an embodiment of the present invention provides a method for preparing a self-adhesive reinforced glass fiber composite coated paper, comprising the following steps:

[0054] Step 1: Material selection:

[0055] Select two glass fibers with greatly different glass transition temperatures, use the glass fiber with high glass transition temperature as the main material, and use the glass fiber with low glass transition temperature as the auxiliary material, and weigh the main material and the auxiliary material in a mass ratio of 4:1;

[0056] Specifically, the main material is aluminoborosilicate glass fiber, whose glass transition temperature is 700°C; the auxiliary material is organosilicon-modified glass fiber, whose glass transition temperature is 400°C;

[0057] Step 2: Coated paper preparation:

[0058] The main material and the auxiliary material are fully mixed, and then formed and dried to obtain a coated paper precursor;

[0059] Specifically, the drying temperature is 60° C., and the drying time is 1 hour.

[0060] Step 3: Heat treatment bonding:

[0061] The coated paper precursor is heat treated at a temperature higher than the glass transition temperature of the auxiliary material but lower than the excessive temperature of its softening point, so that the auxiliary material softens and bonds with the main material to prepare a self-bonding reinforced glass fiber composite coated paper.

[0062] Specifically, the heat treatment temperature is 420° C., and the heat treatment time is 1 hour.

[0063] Embodiment six:

[0064] The difference between this embodiment and embodiment 5 is that: in step 1, the main material and auxiliary material are weighed in a mass ratio of 6:1; in step 2, the drying temperature is 80°C and the drying time is 1.5 hours; in step 3, the heat treatment temperature is 450°C and the heat treatment time is 2 hours.

[0065] Embodiment seven:

[0066] The embodiment of the present invention also provides a method for preparing a self-adhesive reinforced glass fiber composite coated paper, comprising the following steps:

[0067] Step 1: Material selection:

[0068] Using chemical fiber material as the main material and glass fiber with low glass transition temperature as the auxiliary material, the main material and the auxiliary material are weighed in a mass ratio of 4:1;

[0069] Specifically, the main material is aramid fiber, whose glass transition temperature is 350°C; the auxiliary material is silicone-modified glass fiber, whose glass transition temperature is 300°C;

[0070] Step 2: Coated paper preparation:

[0071] The main material and the auxiliary material are fully mixed, and then formed and dried to obtain a coated paper precursor;

[0072] Specifically, the drying temperature is 60° C., and the drying time is 1 hour.

[0073] Step 3: Heat treatment bonding:

[0074] The coated paper precursor is subjected to heat treatment at a temperature higher than the glass transition temperature of the auxiliary material but lower than the excessive temperature of its softening point, so that the auxiliary material is softened and bonded to the main material to prepare a composite material.

[0075] Specifically, the heat treatment temperature is 320° C., and the heat treatment time is 1 hour.

[0076] Comparative Example:

[0077] A method for preparing glass fiber composite coated paper comprises the following steps:

[0078] Step 1: Glass fiber pretreatment:

[0079] The glass fiber is immersed in a treatment solution containing a silane coupling agent, a dispersant and a solvent for 1 hour at a temperature of 80° C., and then taken out and dried at a temperature of 150° C. for 0.5 hour;

[0080] Step 2: Apply adhesive:

[0081] The pretreated glass fibers are uniformly dispersed in a binder solution, wherein the binder solution comprises a self-crosslinking polymer emulsion, a thickener and a defoamer, and the mass ratio of the glass fibers to the binder solution is 4:1. The binder solution containing the glass fibers is coated on the surface of the base paper by a coating device;

[0082] Step 3: Drying and curing:

[0083] The coated paper is sent to a drying oven for drying and curing at a temperature of 200°C for 1 hour to cure the binder and form a glass fiber composite coated paper.

[0084] Experimental example:

[0085] The properties of the composite coated paper prepared in Examples 1 to 6 and the comparative example were tested, and the results are shown in the following table:

[0086] Example Tensile strength(KN / m) Tear strength(KN / m) Viscosity (Pa*s) Embodiment 1 1.5 1.2 35.7 Embodiment 2 1.6 1.3 36.1 Embodiment 3 1.5 1.2 35.8 Embodiment 4 1.6 1.3 36.2 Embodiment 5 1.5 1.2 35.9 Embodiment 6 1.6 1.3 36.3 Comparative Example 0.8 0.7 24.7

[0087] According to the above table, the composite coated paper of Examples 1 to 6 is superior to the glass fiber composite coated paper of the comparative example in terms of tensile strength, tear strength and viscosity. This shows that the preparation method of the present invention can significantly improve the mechanical properties and performance of coated paper. In particular, the composite coated paper of Example 6 reaches the highest value in all performance indicators, which may be due to the use of more optimized ratios and temperature control during material selection and heat treatment. By comparing the experimental results, it can be concluded that the preparation method of the present invention not only effectively solves the problem of binder aging in the prior art, but also achieves a comprehensive improvement in the performance of coated paper through reasonable selection of materials and optimization of processes.

[0088] In summary, the present invention avoids the use of organic binders, thereby overcoming the problem that organic binders are easily aged in acid solutions and significantly extending the service life of coated paper; secondly, by selecting suitable glass fiber materials and optimizing the ratio, the characteristics of the glass material itself are used to achieve bonding, thereby effectively improving the mechanical properties of coated paper.

[0089] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a self-adhesive reinforced glass fiber composite coated paper, characterized in that: The following steps are involved: Step 1: Material selection: Select two glass fibers with greatly different glass transition temperatures, use the glass fiber with high glass transition temperature as the main material, and use the glass fiber with low glass transition temperature as the auxiliary material, and weigh the main material and the auxiliary material in a mass ratio of 4-6:1; Step 2: Coated paper preparation: The main material and the auxiliary material are fully mixed, and then formed and dried to obtain a coated paper precursor; Step 3: Heat treatment bonding: The coated paper precursor is heat treated at a temperature higher than the glass transition temperature of the auxiliary material but lower than the excessive temperature of its softening point, so that the auxiliary material softens and bonds with the main material to prepare a self-bonding reinforced glass fiber composite coated paper.

2. The method for preparing a self-adhesive reinforced glass fiber composite coated paper according to claim 1, characterized in that: In step 1, the main material is quartz glass fiber, and its glass transition temperature is 1000-1100°C; the auxiliary material is silicone-modified glass fiber, and its glass transition temperature is 300-400°C.

3. The method for preparing a self-adhesive reinforced glass fiber composite coated paper according to claim 1, characterized in that: In step 1, the main material is high-silica glass fiber, and its glass transition temperature is 900-1000°C; the auxiliary material is silicone-modified glass fiber, and its glass transition temperature is 300-400°C.

4. The method for preparing a self-adhesive reinforced glass fiber composite coated paper according to claim 1, characterized in that: In step 1, the main material is aluminoborosilicate glass fiber, and its glass transition temperature is 700-800°C; the auxiliary material is organosilicon-modified glass fiber, and its glass transition temperature is 300-400°C.

5. The method for preparing a self-adhesive reinforced glass fiber composite coated paper according to claim 1, characterized in that: In step 2, the drying temperature is 60-80° C., and the drying time is 1-1.5 hours.

6. The method for preparing a self-adhesive reinforced glass fiber composite coated paper according to claim 2, 3 or 4, characterized in that: In step three, the heat treatment temperature is 400-450° C., and the heat treatment time is 1-2 hours.

7. The method for preparing a self-adhesive reinforced glass fiber composite coated paper according to claim 1, characterized in that: The method also includes selecting appropriate glass fiber and chemical fiber for mixing and heat treatment to prepare composite materials.

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