Anti-sticking and wear-resistant belt for tobacco equipment and production method

Abstract

The present invention relates to an anti-sticking and wear-resistant belt for tobacco equipment and a production method thereof, and belongs to the field of tobacco machinery. Specifically comprising the following steps: Step 1, preparing a substrate and a composite resin, wherein the substrate can be a polyester fiber cloth or a nylon cloth according to the use environment. The composite resin material comprises 30-40wt% polysilazane, 10-25wt% dimethylsilane cage-based polysilsesquioxane, 10-30wt% polyimide, 5-20wt% polyurethane, and 10-20wt% filler; Step 2, laying a layer of substrate, depositing and coating the composite resin on the substrate after hot melting at 360°C, and infiltrating; Step 3, shaping the composite resin; Step 4, repeating steps 2 and 3 until the required thickness. The belt prepared by the present invention has low porosity, is colorless and transparent, and is smooth and beautiful. The raw material is food-grade non-toxic and odorless. The belt has good hydrophobic and oleophobic properties. The static angle of natural flavors, nicotine, grease, and other tobacco mixed oil stains is greater than 120 degrees, and the rolling angle is less than 10 degrees.

Description

Technical Field

[0001] The invention relates to an anti-sticking and wear-resistant belt for tobacco equipment and a production method thereof, belonging to the field of tobacco machinery. Background Art

[0002] In domestic threshing and redrying plants, cigarette factories and other related tobacco processing links, tobacco leaves, tobacco shreds, tobacco stems and other materials need to be threshed and separated, dried and baled, vacuum moisturized, dried and shredded, cut, blended, stored and aged, rolled and glued, packaged and transported.

[0003] Tobacco leaves themselves have complex ingredients, including complex compound components, such as tobacco amino acids, tobacco proteins, alkaloids, tar, natural flavors and inorganic compounds. In addition, different formulations of flavors and fragrances are added to tobacco materials during production, resulting in a high material precipitation rate, high oil content and complex ingredients. Materials are very likely to remain on the surface of existing belts, and the belt surface cannot be effectively cleaned after production is completed. When tobacco processing companies produce materials of different batches and formulations, residual stains on the belt surface will pollute and mix the materials, significantly affecting the design taste of different grades of tobacco products. This is a long-standing problem in the tobacco processing industry that needs to be solved urgently.

[0004] The existing belts in the tobacco industry are PVC belts and PE belts. PVC belts have high surface energy, serious stickiness, and are difficult to clean and will mix materials. PE is the abbreviation of polyethylene, which is a widely used polymer material. It has the advantages of food grade, good safety, good resistance to pyrolysis, stable chemical properties, and good heat resistance. PE belts are currently widely used in various production and storage equipment in the tobacco industry. The existing disadvantages of PE belts are: low surface hardness, poor wear resistance, large film porosity, and oil stains are easy to penetrate over time, which will increase the surface energy of the material, causing the material to scale easily and be difficult to clean. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an anti-sticking and wear-resistant belt for tobacco equipment and a production method thereof.

[0006] First, the present invention provides a method for producing an anti-sticking and wear-resistant belt for tobacco equipment, which specifically comprises the following steps:

[0007] Step 1, preparing a substrate and a composite resin, wherein the composite resin comprises 30-40wt% polysilazane, 10-25wt% dimethylsilane cage-based polysilsesquioxane, 10-30wt% polyimide, 5-20wt% polyurethane, and 10-20wt% filler;

[0008] Step 2: Lay a layer of substrate, melt the composite resin and deposit it on the substrate for infiltration;

[0009] Step 3, shaping the composite resin;

[0010] Step 4. Repeat steps 2 and 3 until the required thickness (1-3mm) is reached.

[0011] In step 1, use a PP plastic plate and a brush to remove stains on the surface of the substrate, then spray the surface of the substrate with 75wt% medical alcohol, wipe it clean with a clean non-woven cloth after 5 minutes, and repeat 3-5 times until the surface is smooth.

[0012] Then spray the surface of the substrate with anhydrous ethanol, quickly wipe it clean with a clean non-woven cloth, and repeat 2-3 times to ensure that there are no stains or moisture residue on the surface.

[0013] In step 1, the composite resin emulsion is matured for 2 hours and filtered through a double-layer filter screen with a mesh size of 500 or more before use.

[0014] The filler is titanium dioxide or silicon dioxide, aluminum oxide, silicon carbide, tungsten disulfide, and is used to improve hardness and friction resistance.

[0015] In step 2, the substrate is a woven fabric or a knitted fabric. The substrate is composed of yarns, and the yarns include monofilaments, twisted monofilaments or multifilaments. The substrate is a polyester fiber cloth or a nylon cloth.

[0016] In step 3, first place it at room temperature for 24 hours or blow it dry with 50 degrees hot air for 30 minutes to completely evaporate the moisture in the coating, and avoid ultraviolet radiation during this period. Then use a UV-LED machine to cure it for 5-10 seconds.

[0017] The present invention also provides an anti-sticking and wear-resistant belt for tobacco equipment, which is composed of a composite resin of a multi-layer substrate and a permeable coating substrate, wherein the composite resin includes 30-40wt% polysilazane, 10-25wt% dimethylsilane cage-based polysilsesquioxane, 10-30wt% polyimide, 5-20wt% polyurethane, and 10-20wt% filler.

[0018] The substrate material is polyester fiber cloth or nylon cloth.

[0019] The PE belts in the prior art are prone to oil seepage and sticky materials. The belts made of the new material of the present invention can overcome the existing shortcomings, reduce the mixing accidents between different batches of materials, and reduce the intensity and frequency of cleaning. Improving the toughness and wear resistance of the belts also increases the service life. In the composite resin of the present invention, polyimide and polyurethane are added to the silicone resin to toughen and harden the belts, and the belts have high density, are oil-proof, hydrophobic, oleophobic, and resistant to oil penetration. DETAILED DESCRIPTION

[0020] The present invention provides a method for producing an anti-sticking and wear-resistant belt for tobacco equipment, which specifically comprises the following steps:

[0021] Step 1, preparing a substrate and a composite resin, wherein the composite resin material comprises 30-40wt% polysilazane, 10-25wt% dimethylsilane cage-based polysilsesquioxane, 10-30wt% polyimide, 5-20wt% polyurethane, and 10-20wt% filler;

[0022] Step 2: Lay a layer of substrate and deposit the composite resin onto the substrate by spraying or roller brushing for penetration;

[0023] Step 3, shaping the composite resin;

[0024] Step 4. Repeat steps 2 and 3 until the required thickness is 1-3mm. Example

[0025] Step 1: Use a PP plastic plate and a brush to remove stains on the surface of the substrate, then spray the surface of the substrate with 75wt% medical alcohol, wipe it clean with a clean non-woven cloth after 5 minutes, and repeat 3 times until the surface is smooth.

[0026] Then spray the surface of the substrate with anhydrous ethanol, quickly wipe it clean with a clean non-woven cloth, and repeat twice to ensure that there is no stain or moisture residue on the surface.

[0027] The composite resin material includes 40wt% polysilazane, 10wt% dimethylsilane cage-based polysilsesquioxane, 10wt% polyimide, 20wt% polyurethane, and 20wt% filler. The composite resin emulsion is aged for 2 hours and filtered through a double-layer filter screen with a mesh size of 500 or more before use. The filler is titanium dioxide.

[0028] Step 2: After the composite resin is hot-melted, it is sprayed through a piezoelectric nozzle. The substrate is a woven fabric. The substrate is composed of yarn, the yarn is a monofilament, and the substrate material is polyester fiber cloth.

[0029] Step 3: Leave it at room temperature for 24 hours to allow the moisture in the coating to evaporate completely, and avoid ultraviolet light during this period. Then use a UV-LED machine to cure it for 5 seconds.

[0030] Step 4. Repeat steps 2 and 3 until the required thickness is 1-3mm. Example

[0031] Step 1: Use a PP plastic plate and a brush to remove stains on the surface of the substrate, then spray the surface of the substrate with 75wt% medical alcohol, wipe it clean with a clean non-woven cloth after 5 minutes, and repeat 5 times until the surface is smooth.

[0032] Then spray the surface of the substrate with anhydrous ethanol, quickly wipe it clean with a clean non-woven cloth, and repeat 3 times to ensure that there is no stain or moisture residue on the surface.

[0033] The composite resin material includes 35wt% polysilazane, 13wt% dimethylsilane cage-based polysilsesquioxane, 12wt% polyimide, 20wt% polyurethane, and 20wt% filler, wherein the filler is silicon dioxide. The composite resin emulsion is aged for 2 hours and filtered through a double-layer filter screen with a mesh size of 500 or more before use.

[0034] Step 2: The composite resin is melted and then sprayed and deposited. The substrate is a knitted fabric. The substrate is composed of yarn, and the yarn is multifilament. The substrate material is polyester fiber.

[0035] Step 3: Leave it at room temperature for 24 hours to allow the moisture in the coating to evaporate completely, and avoid ultraviolet light during this period. Then use a UV-LED machine to cure it for 10 seconds.

[0036] Step 4. Repeat steps 2 and 3 until the required thickness is 1-3mm. Example

[0037] Step 1: Use a PP plastic plate and a brush to remove stains on the surface of the substrate, then spray the surface of the substrate with 75wt% medical alcohol, wipe it clean with a clean non-woven cloth after 5 minutes, and repeat 3-5 times until the surface is smooth.

[0038] Then spray the surface of the substrate with anhydrous ethanol, quickly wipe it clean with a clean non-woven cloth, and repeat twice to ensure that there is no stain or moisture residue on the surface.

[0039] The composite resin material includes 32wt% polysilazane, 15wt% dimethylsilane cage-based polysilsesquioxane, 13wt% polyimide, 20wt% polyurethane, and 20wt% filler. The composite resin emulsion is aged for 2 hours and filtered through a double-layer filter screen with a mesh size of 500 or more before use. The filler is aluminum oxide.

[0040] Step 2: The composite resin is hot-melted and then sprayed. The substrate is a woven fabric. The substrate is composed of yarns, which are twisted monofilaments. The substrate material is nylon.

[0041] Step 3: First, use 50 degrees Celsius hot air to dry for 30 minutes to completely evaporate the moisture in the coating, and avoid ultraviolet radiation during this period. Then use a UV-LED machine to cure it for 10 seconds.

[0042] Step 4. Repeat steps 2 and 3 until the required thickness is 1-3mm. Example

[0043] Step 1: Use a PP plastic plate and a brush to remove stains on the surface of the substrate, then spray the surface of the substrate with 75wt% medical alcohol, wipe it clean with a clean non-woven cloth after 5 minutes, and repeat 3-5 times until the surface is smooth.

[0044] Then spray the surface of the substrate with anhydrous ethanol, quickly wipe it clean with a clean non-woven cloth, and repeat twice to ensure that there is no stain or moisture residue on the surface.

[0045] The composite resin material includes 35wt% polysilazane, 20wt% dimethylsilane cage-based polysilsesquioxane, 15wt% polyimide, 10wt% polyurethane, and 20wt% filler, wherein the filler is aluminum oxide.

[0046] The composite resin emulsion is matured for 2 hours and filtered through a double-layer filter with a mesh size of 500 or more before use.

[0047] Step 2: The composite resin is hot-melted and then sprayed. The substrate is a woven fabric. The substrate is composed of yarns, which are twisted monofilaments. The substrate material is nylon.

[0048] Step 3: First, use 50 degrees Celsius hot air to dry for 30 minutes to completely evaporate the moisture in the coating, and avoid ultraviolet radiation during this period. Then use a UV-LED machine to cure it for 10 seconds.

[0049] Step 4. Repeat steps 2 and 3 until the required thickness is 1-3mm. Example

[0050] Step 1: Use a PP plastic plate and a brush to remove stains on the surface of the substrate, then spray the surface of the substrate with 75wt% medical alcohol, wipe it clean with a clean non-woven cloth after 5 minutes, and repeat 3-5 times until the surface is smooth.

[0051] Then spray the surface of the substrate with anhydrous ethanol, quickly wipe it clean with a clean non-woven cloth, and repeat twice to ensure that there is no stain or moisture residue on the surface.

[0052] The composite resin material comprises 30 wt % polysilazane, 25 wt % dimethylsilane cage-based polysilsesquioxane, 30 wt % polyimide, 5 wt % polyurethane, and 10 wt % filler, wherein the filler is aluminum oxide.

[0053] The composite resin emulsion is matured for 2 hours and filtered through a double-layer filter with a mesh size of 500 or more before use.

[0054] Step 2: The composite resin is hot-melted and then sprayed. The substrate is a woven fabric. The substrate is composed of yarns, which are twisted monofilaments. The substrate material is nylon.

[0055] Step 3: First, use 50 degrees Celsius hot air to dry for 30 minutes to completely evaporate the moisture in the coating, and avoid ultraviolet radiation during this period. Then use a UV-LED machine to cure it for 10 seconds.

[0056] Step 4. Repeat steps 2 and 3 until the required thickness is 1-3mm.

[0057] The anti-sticking performance of the belt prepared in the embodiment was tested by a contact angle tester, and the results are as follows:

[0058]

[0059] The belt prepared by the present invention is suitable for conveyors, lifting feeders, electronic belt scales, storage cabinets, cigarette pack conveying channels, and other tobacco processing equipment using belts in the tobacco processing industry. It has the following effects: low porosity, smooth and beautiful appearance. The raw materials are food-grade, non-toxic and odorless. It has good chemical stability and has no chemical reaction when in long-term contact with materials. The belt has good hydrophobicity and oleophobicity, and the static angle for natural flavors, nicotine, grease, and other tobacco mixed oils is greater than 120 degrees, and the rolling angle is less than 10 degrees. The resin substrate used in the belt meets the requirements of the national food grade standard. The belt has good flexibility. It has good bending and deformation resistance when the speed is less than 50 meters per minute. The belt has good temperature resistance and meets the long-term use requirements within -20 degrees Celsius to 180 degrees Celsius. The elongation rate of the belt is consistent with that of the existing traditional belt, and there is no need to change the installation size of the existing equipment.

Claims

1. A method for producing an anti-sticking and wear-resistant belt for tobacco equipment, comprising the following steps: Step 1, preparing a substrate and a composite resin, wherein the composite resin comprises 30-40wt% polysilazane, 10-25wt% dimethylsilane cage-based polysilsesquioxane, 10-30wt% polyimide, 5-20wt% polyurethane, and 10-20wt% filler; Step 2: Lay a layer of substrate, melt the composite resin and deposit it on the substrate for infiltration; Step 3, shaping the composite resin; Step 4: Repeat steps 2 and 3 until the required thickness is reached.

2. The production method according to claim 1, characterized in that In step 1, use a PP plastic plate and a brush to remove stains on the surface of the substrate, then spray the surface of the substrate with 75wt% medical alcohol, wipe it clean with a clean non-woven cloth after 5 minutes, and repeat 3-5 times until the surface is smooth; Then spray the surface of the substrate with anhydrous ethanol, quickly wipe it clean with a clean non-woven cloth, and repeat 2-3 times to ensure that there are no stains or moisture residue on the surface.

3. The production method according to claim 1, characterized in that In step 1, the composite resin emulsion is matured for 2 hours and filtered through a double-layer filter screen with a mesh size of 500 or more before use.

4. The production method according to claim 1, characterized in that In step 1, the filler is titanium dioxide or silicon dioxide, aluminum oxide, silicon carbide, or tungsten disulfide.

5. The production method according to claim 1, characterized in that: In step 2, the substrate is a woven fabric or a knitted fabric.

6. The production method according to claim 5, characterized in that The substrate is composed of yarns, which include monofilaments, twisted monofilaments or multifilaments.

7. The production method according to claim 5 or 6, characterized in that: The substrate material is polyester fiber cloth or nylon cloth.

8. The production method according to claim 1, characterized in that: In step three, first place it at room temperature for 24 hours or blow dry it with 50 degrees Celsius hot air for 30 minutes to allow the moisture in the composite resin to evaporate completely, and avoid ultraviolet radiation during the process; then use a UV-LED machine to cure it for 5-10 seconds.

9. An anti-stick and wear-resistant belt for tobacco equipment, composed of a multi-layer substrate and a composite resin that permeates and coats the substrate, the composite resin comprising 30-40wt% polysilazane, 10-25wt% dimethylsilane cage-based polysilsesquioxane, 10-30wt% polyimide, 5-20wt% polyurethane, and 10-20wt% filler.

10. The anti-sticking wear-resistant belt according to claim 9, characterized in that: The substrate is polyester fiber cloth or nylon cloth.

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