Antistatic easy-to-clean wear-resistant cigarette filter conveying pipeline composite material and preparation method thereof

Abstract

The invention discloses an antistatic easy-to-clean wear-resistant cigarette filter conveying pipeline composite material and a preparation method thereof, the composite material comprises the following components in percentage by mass: 75%-85% of transparent polyamide, 10%-20% of an antistatic agent, 3%-5% of a compatilizer, 1%-2% of a wear-resistant agent and 0.5%-1% of a flow modifier, and the sum of the mass percentages of the components is 100%. The surface resistance of the prepared antistatic wear-resistant polymer composite material is as low as 106-109 ohm, the friction coefficient is lower than 0.2, and a conveying pipeline processed by the antistatic wear-resistant polymer composite material has the advantages of being antistatic, easy to clean, high in wear resistance, visual, light in weight, bendable to install and the like, can replace a traditional metal pipeline and is used for conveying cigarette filters.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high polymer composite materials, in particular to an anti-static, easy-to-clean and wear-resistant cigarette filter conveying pipeline composite material and a preparation method thereof. BACKGROUND

[0002] In the tobacco industry, the conveying of cigarette filters is an important link in the production of finished cigarette. Food-grade stainless steel has the characteristics of high strength, corrosion resistance, hygiene and environmental protection, and is widely used in cigarette filter conveying pipelines. However, the traditional stainless steel material has the following problems in the long-term use process:

[0003] (1) Non-visualization: the stainless steel pipe is not transparent, and the internal conveying situation cannot be directly monitored, making fault diagnosis difficult;

[0004] (2) Easy to block: the joint of the stainless steel pipe is prone to blockage, affecting the conveying efficiency;

[0005] (3) High installation and maintenance cost: the stainless steel is heavy and difficult to install, and the joint is prone to wear and tear and needs to be replaced frequently.

[0006] Transparent polyamide has the characteristics of transparency, high strength and high toughness, and is non-toxic and odorless, meeting the FDA and EU standards, and can be used in the food field. Its light transmittance is more than 90%, and when used as the main material of the cigarette filter conveying pipeline, it can realize full-process visual monitoring. However, the anti-static ability of polyamide itself is insufficient, and it needs to be modified to resist static electricity to prevent the accumulation of static electricity on the surface and ensure the cleanliness and stability of the product. SUMMARY

[0007] The technical problem to be solved by the present application is to overcome the technical defects of the background art and provide an anti-static, easy-to-clean and wear-resistant cigarette filter conveying pipeline composite material and a preparation method thereof. The anti-static and wear-resistant high polymer composite material prepared by the present application has a surface resistance as low as 10 6 ~10 9 Ω, and a friction coefficient less than 0.2. The conveying pipeline processed therefrom has the advantages of anti-static, easy-to-clean, high wear resistance, visualization, light weight and bendable installation, and can replace traditional metal pipelines and be used for conveying cigarette filters.

[0008] The technical solution adopted by the present application to solve the above technical problems is as follows:

[0009] An anti-static, easy-to-clean and wear-resistant cigarette filter conveying pipeline composite material, the material formula is as follows:

[0010] Base material: transparent polyamide (75wt%-85wt%)

[0011] Fillers and processing aids are shown in Table 1.

[0012] Table 1 mass percentage of each filler and processing aid in the anti-static easy-to-clean wear-resistant cigarette filter conveying pipeline composite material of the application and its role

[0013] Filler name Mass ratio / wt% Effect Antistatic agent 10~20 Make the material have permanent antistatic ability Compatibilizer 3~5 Improve the compatibility and dispersibility of the filler and the matrix Abrasion resistance agent 1~3 Reduce the friction coefficient and wear of the material Flow modifier 0.5~1 Improve the processing performance of the material

[0014] An anti-static easy-to-clean wear-resistant cigarette filter conveying pipeline composite material, comprising the following components in percentage by mass: transparent polyamide 75-85%, anti-static agent 10-20%, compatibility agent 3-5%, wear-resistant agent 1-3%, flow modifier 0.5-1%, and the sum of the mass percentages of the components is 100%.

[0015] Preferably, the number average molecular weight of the transparent polyamide is 15-50 thousand, more preferably 15-30 thousand.

[0016] Preferably, the anti-static agent is an internal additive, more preferably any one of polyol ester, fatty amide, and polyoxyethylene.

[0017] Preferably, the compatibility agent is a maleic anhydride graft, more preferably POE-g-MAH.

[0018] Preferably, the wear-resistant agent is a transparent copolymer, more preferably ethylene / alpha-olefin-based resin.

[0019] Preferably, the flow modifier is a hyperbranched polymer, more preferably any one of HyPer C181, HyPer C182, and HyPer C18D.

[0020] The preparation method of the anti-static easy-to-clean wear-resistant cigarette filter conveying pipeline composite material as described above comprises melt blending, granulation, and extrusion molding, and specifically comprises the following steps:

[0021] (1) weighing each component in proportion and mixing uniformly;

[0022] (2) melt blending through a double-screw extruder and extruding and granulating;

[0023] (3) molding through a single-screw extruder to obtain the anti-static easy-to-clean wear-resistant cigarette filter conveying pipeline composite material.

[0024] Preferably, in step (2), the processing temperature of the double-screw extruder is 200-220°C, and the screw rotation speed is 300-500 rpm.

[0025] Preferably, in step (3), the processing temperature during extrusion molding is 200-220°C, and the pressure is 10-15 bar.

[0026] Compared with the prior art, the anti-static easy-to-clean wear-resistant cigarette filter conveying pipeline composite material of the application has the following beneficial effects:

[0027] The application adopts modified transparent polyamide as the main material of the conveying pipeline, the final product has high light transmittance, realizes whole-process visual monitoring, the friction coefficient is lower than 0.2, the friction resistance is effectively reduced, and the conveying efficiency is improved. The application uses an internal additive antistatic agent, realizes long-lasting antistatic effect through uniform dispersion in the material, has good compatibility with the polyamide matrix, avoids the risk of precipitation, after antistatic modification, the surface resistance of the pipeline is reduced to 10 6 ~10 9 Ω, effectively inhibits static accumulation, reduces dust adsorption, and keeps the inner wall clean for a long time. At the same time, the plastic pipeline can adopt integrated jointless design and can be installed in a curved way, avoiding the blockage and difficult cleaning problem of the connection part of the traditional stainless steel pipe. DETAILED DESCRIPTION

[0028] In order to better understand the content of the application, the following further describes in combination with specific examples. It should be understood that these examples are only used to further illustrate the application, and are not used to limit the scope of the application. In addition, it should be understood that after reading the content described in the application, the person skilled in the art makes some non-essential modifications or adjustments to the application, which still belongs to the protection scope of the application.

[0029] Example 1

[0030] A preparation method of an antistatic easy-to-clean wear-resistant cigarette filter conveying pipeline composite material, the steps are as follows:

[0031] (1) 84.5wt% of dry transparent polyamide 84.5wt% (number average molecular weight: 20,000), 10wt% of antistatic agent polyoxyethylene, 4wt% of compatible agent POE-g-MAH, 1wt% of wear-resistant agent ethylene / alpha-olefin-based resin, and 0.5wt% of flow modifier HyPer C18D are weighed and uniformly mixed in a high-speed mixer;

[0032] (2) The mixed material is melt-extruded through a double-screw extruder and granulated through a granulator; wherein the processing temperature of the double-screw extruder is 210℃, and the screw rotation speed is 350rpm;

[0033] (3) The modified transparent polyamide particles are dried and then extruded into a shape through a single-screw extruder, thereby obtaining the antistatic easy-to-clean wear-resistant cigarette filter conveying pipeline composite material, wherein the processing temperature during extrusion is 210℃, and the pressure is 12bar.

[0034] Example 2

[0035] The specific procedure of Example 1 was followed, except that the formulation was changed to: transparent polyamide 80.5 wt% (number average molecular weight: 20,000), antistatic agent polyoxyethylene 15 wt%, compatibilizer POE-g-MAH 3 wt%, abrasion resistant agent ethylene / alpha-olefin based resin 1 wt%, flow modifier HyPer C18D 0.5 wt%

[0036] Example 3

[0037] The specific procedure of Example 1 was followed, except that the formulation was changed to: transparent polyamide 79.5 wt% (number average molecular weight: 20,000), antistatic agent polyoxyethylene 15 wt%, compatibilizer POE-g-MAH 3 wt%, abrasion resistant agent ethylene / alpha-olefin based resin 2 wt%, flow modifier HyPer C18D 0.5 wt%.

[0038] Example 4

[0039] The specific procedure of Example 1 was followed, except that the formulation was changed to: transparent polyamide 76.5 wt% (number average molecular weight: 20,000), antistatic agent polyoxyethylene 18 wt%, compatibilizer POE-g-MAH 3 wt%, abrasion resistant agent ethylene / alpha-olefin based resin 2 wt%, flow modifier HyPer C18D 0.5 wt%.

[0040] Comparative Example 1

[0041] The specific procedure of Example 1 was followed, except that the formulation was changed to: transparent polyamide 99.5 wt% (number average molecular weight: 20,000), flow modifier HyPer C18D 0.5 wt%.

[0042] Comparative Example 2

[0043] The specific procedure of Example 1 was followed, except that the formulation was changed to: transparent polyamide 89.5 wt% (number average molecular weight: 20,000), antistatic agent polyoxyethylene 10 wt%, flow modifier HyPer C18D 0.5 wt%.

[0044] The surface resistance, coefficient of friction, and wear rate of the materials prepared in Examples 1-4 and Comparative Examples 1-2 above are shown in Table 2. The surface resistance of the materials was tested according to IEC 60093, and the coefficient of friction and wear rate were tested according to ASTM D3702 (load 500 N, rotation speed 100 r / min, for 1.5 h).

[0045] Table 2 Test results of surface resistance, coefficient of friction, and wear rate of the materials prepared in Examples 1-4 and Comparative Examples 1-2

[0046] Implementation case Surface resistance / Ω Friction coefficient Wear amount / % Example 1 10 9 ]] 0.19 0.42 Example 2 10 8 ]] 0.14 0.39 Example 3 10 8 ]] 0.10 0.21 Example 4 10 7 ]] 0.13 0.35 Comparative example 1 >10 12 ]] 0.27 0.47 Comparative example 2 10 9 ]] 0.30 0.53

[0047] As shown in Table 2, after the antistatic modification, the surface resistance of the transparent polyamide (Examples 1-4) is significantly reduced compared with the unmodified sample (Comparative Example 1), and with the increase of the content of the antistatic agent, the surface resistance of the composite material is continuously reduced, and the surface resistance of the modified material is stabilized at 10 6 ~10 9 , which meets the antistatic requirements of the product.

[0048] As can be seen from the data of Examples 1-4 and Comparative Examples 1-2, the addition of the antistatic agent increases the friction coefficient and the wear amount of the material, but by compounding 1-2 wt% of the wear-resistant agent, the friction coefficient and the wear amount of the material can be reduced to the unmodified level or even lower; after the modification, the friction coefficient of the composite material is less than 0.2, which can effectively reduce the friction resistance and improve the conveying efficiency of the cigarette filter.

[0049] The antistatic easy-to-clean wear-resistant cigarette filter conveying pipeline composite material of the present application has the characteristics of visualization, antistatic, easy-to-clean, wear-resistant, etc., and can replace the traditional metal pipeline to realize clean and efficient conveying of the cigarette filter, reduce the blocking phenomenon in the conveying process, and reduce the installation and maintenance cost.

[0050] The above description is not a limitation of the present application, and the present application is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary skilled in the art within the essential scope of the present application shall also belong to the protection scope of the present application.

Claims

1. A composite material for an antistatic, easy-to-clean, and wear-resistant cigarette filter conveying pipe, characterized in that, By mass percentage, it includes the following components: 75%~85% transparent polyamide, 10%~20% antistatic agent, 3%~5% compatibilizer, 1%~2% abrasion resistant agent, and 0.5%~1% flow modifier, with the sum of the mass percentages of each component being 100%.

2. The antistatic, easy-to-clean, wear-resistant cigarette filter conveying pipe composite material as described in claim 1, characterized in that, The transparent polyamide has a number-average molecular weight of 15,000 to 50,000.

3. The antistatic, easy-to-clean, wear-resistant cigarette filter conveying pipe composite material as described in claim 1, characterized in that, The antistatic agent is an internal additive.

4. The antistatic, easy-to-clean, wear-resistant cigarette filter conveying pipe composite material as described in claim 1, wherein the antistatic agent is any one of polyol ester, fatty amide, and polyoxyethylene.

5. The antistatic, easy-to-clean, wear-resistant cigarette filter conveying pipe composite material as described in claim 1, characterized in that, The compatibilizer is a maleic anhydride graft.

6. The antistatic, easy-to-clean, wear-resistant cigarette filter conveying pipe composite material as described in claim 1, characterized in that, The abrasion-resistant agent is a transparent copolymer.

7. The antistatic, easy-to-clean, wear-resistant cigarette filter conveying pipe composite material as described in claim 1, characterized in that, The flow modifier is a hyperbranched polymer.

8. A method for preparing an antistatic, easy-to-clean, wear-resistant cigarette filter conveying pipe composite material as described in any one of claims 1 to 7, characterized in that, Includes the following steps: (1) Weigh each component according to the proportion and mix them evenly; (2) Melt blending and extrusion granulation are carried out using a twin-screw extruder; (3) The antistatic, easy-to-clean, wear-resistant cigarette filter conveying pipe composite material is obtained by molding with a single screw extruder.

9. The preparation method of the antistatic, easy-to-clean, wear-resistant cigarette filter conveying pipe composite material as described in claim 8, characterized in that, In step (2), the processing temperature of the twin-screw extruder is 200~220℃ and the screw speed is 300~500rpm.

10. The method for preparing an antistatic, easy-to-clean, wear-resistant cigarette filter conveying pipe composite material as described in claim 8, characterized in that, In step (3), the extrusion molding process is carried out at a temperature of 200~220℃ and a pressure of 10~15 bar.