阅读说明：本技术 一种永久抗静电轻型毛毡输送带制作方法 (Method for manufacturing permanent antistatic light felt conveyer belt ) 是由 童亚彪 于 2021-08-26 设计创作，主要内容包括：本发明提供一种永久抗静电轻型毛毡输送带制作方法,包括如下步骤：分别通过碳纳米水性溶液和羧基丁苯胶乳溶液进行毛毡浸渍,使溶液完全渗透到毛毡中,烘干后得毛毡纤维层；将所得毛毡纤维层的纤维面进行打磨；织物定型；PVC/PU胶水底涂；将所得毛毡层与织物层贴合,得永久抗静电轻型毛毡输送带。本发明是通过两步法浸渍毛毡,使其获得抗静电性能,再通过打磨使毛毡获得较好的外观,与其他材质贴合得到永久抗静电毛毡输送带。(The invention provides a method for manufacturing a permanent antistatic light felt conveyor belt, which comprises the following steps: respectively dipping the felt by using a carbon nano aqueous solution and a carboxylic styrene-butadiene latex solution to enable the solution to be completely permeated into the felt, and drying to obtain a felt fiber layer; polishing the fiber surface of the obtained felt fiber layer; shaping the fabric; PVC/PU glue prime coat; and (5) attaching the obtained felt layer to the fabric layer to obtain the permanent antistatic light felt conveyor belt. The invention adopts a two-step method to dip the felt to obtain antistatic performance, and then polishes the felt to obtain better appearance, and the felt is attached to other materials to obtain the permanent antistatic felt conveyer belt.)

1. A method for manufacturing a permanent antistatic light felt conveyor belt is characterized by comprising the following steps:

step a), impregnating the felt through a carbon nano aqueous solution, completely permeating the solution into the felt, drying, continuously impregnating the felt through a carboxylic styrene-butadiene latex solution, completely permeating the solution into the felt, and drying;

step b) polishing the fiber surface of the felt obtained in the step a) to obtain a felt layer;

c) shaping the polyester fabric at high temperature to obtain a fabric layer;

d) priming the bottom surface of the fabric layer obtained in the step c) twice by using PVC/PU glue;

coating PU glue on the reverse side of the felt fiber layer obtained in the step e) and attaching the PU glue to the bottom coating surface of the fabric layer obtained in the step d) to obtain the permanent antistatic light felt conveyor belt.

2. The method for manufacturing the permanent antistatic light felt conveyor belt according to claim 1, wherein in the carbon nano aqueous solution in the step a), the carbon nano aqueous material: 60 parts of water: 40.

3. the method for manufacturing a permanent antistatic light felt conveyor belt according to claim 1, wherein in the carboxylic styrene-butadiene latex solution in the step a), the carboxylic styrene-butadiene latex A: carboxylated styrene-butadiene latex B: accelerator (b): curing agent: color paste is 85-90: 10: 15: 3-5: 2-4: 2 to 3.

4. The method for manufacturing a permanent antistatic light felt conveyor belt according to claim 2, wherein the carbon nano water-based material is a uniform solution of carbon nanotubes dispersed in water, and the solid content is about 2.5%.

5. The method for manufacturing the permanent antistatic light felt conveyor belt according to claim 3, wherein the carboxylated styrene-butadiene latex A/B is carboxylated styrene-butadiene latex with different hardness, the glass transition temperature Tg of the carboxylated styrene-butadiene latex A is-27 ℃, and the glass transition temperature Tg of the carboxylated styrene-butadiene latex B is-35 ℃.

6. The permanent antistatic light felt conveyor belt manufactured according to the method of any one of claims 1 to 5, characterized by comprising a felt fiber layer, a felt fabric layer, a PVC or PU layer and a bottom fabric layer in sequence from top to bottom.

Technical Field

The invention relates to a method for manufacturing a permanent antistatic light felt conveyor belt, and belongs to the field of chemical industry.

Background

The antistatic conveying belt is generally made of PVC and TPU, the material is subjected to antistatic performance through PVC formula design or modification of TPU, and then the light conveying belt is manufactured through a coating or calendering mode.

However, the belt body of the conveying belt made of PVC or TPU has higher surface hardness and poor elasticity compared with the felt, and is difficult to play a better protection role on conveyed objects with higher requirements; on the other hand, the PVC/PU material has high antistatic index of 10⁸Omega, if the antistatic effect is to be equal to good, the antistatic agent needs to be mixed with PVC or PU materialThe material has good compatibility, and the processing performance and the service performance of the material cannot be influenced, and the general PVC/PU product is 10⁸～10⁹Omega, if a better antistatic effect is needed, directional development is needed, and the cost is higher.

Disclosure of Invention

Aiming at the problems in the prior art, the manufacturing method of the permanent antistatic light felt conveyor belt has the characteristics of easiness in disassembly and washing, antibiosis, stable transportation and the like.

The technical scheme provided by the invention is as follows:

a method for manufacturing a permanent antistatic light felt conveyor belt specifically comprises the following steps:

step a), carrying out felt impregnation through a carbon nano aqueous solution, completely permeating the solution into the felt, and drying;

step b) dipping the felt obtained in the step a) by a carboxylic styrene-butadiene latex solution, and drying the felt after the solution is completely infiltrated into the felt;

step c) polishing the fiber surface of the felt obtained in the step b) to obtain a felt fiber layer; on one hand, the appearance is required, and on the other hand, the flatness of the belt body is ensured;

step d) high-temperature setting of the polyester fabric to obtain a fabric layer; by means of high-temperature setting, on one hand, the fabric is shrunk, and the fabric is guaranteed not to shrink when in use; on the other hand, the flatness of the fabric can be improved, for example, wrinkles can be greatly improved (factors influencing the flatness of the belt body);

and e) priming the fabric layer obtained in the step d) twice with PVC/PU glue, and attaching the fabric layer to the felt fiber layer obtained in the step c) to obtain the integral single-side coated glue of the permanent antistatic light felt conveyor belt felt, wherein the adhesive strength of the felt and PVC or PU is ensured for attaching to the next step. PVC or PU on felt and bottom fabric is the needs of guaranteeing the post-processing joint intensity, because in use generally all be annular conveyer belt, all need the joint to accomplish, if do not have PVC or PU joint intensity very low, can seriously influence the life of conveyer belt.

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

the felt fiber layer provides softness and resilience for the conveyor belt body and can protect the surface of conveyed articles; the felt fabric layer provides certain strength, the problem of large felt shrinkage in a two-step method can be solved, and cost is saved. (the pure felt has a much higher thermal shrinkage ratio than the felt with the fabric core); on the other hand, the felt has a fabric core layer, so that the requirement of a bottom fabric layer can be reduced.

The method is environment-friendly: the dipping latex is an aqueous solvent, the solid content is about 50 percent, and the harmful discharge is reduced;

the design is changeable: the lower the antistatic index is, the better the antistatic effect is, the more the charge accumulation in the use process can be reduced, the generation of static electricity can be prevented, and the light conveyor belt (10) with different antistatic indexes can be obtained according to the requirements through the invention⁵～10⁸Omega), the integral hardness of the belt body can be adjusted through the soft and hard proportion of the latex. The method comprises the following steps:

carbon nano aqueous solution: 60 parts of water: 40, this kind of carbon nanometer water-based material is the even solution of carbon nanometer material dispersion in aqueous, and general solid content is about 2.5%, can be with any proportion "mutual solution" of water (carbon nanometer granule evenly disperses in liquid, can adjust carbon nanotube solid content, adjusts the antistatic index in surface), can mix with water according to antistatic demand, wait to the solution of different antistatic grades.

② carboxylic styrene-butadiene latex A: carboxylated styrene-butadiene latex B: accelerator (b): curing agent: color paste is 85-90: 10: 15: 3-5: 2-4: 2-3; the carboxylic styrene-butadiene latex A/B is carboxylic styrene-butadiene latex with different hardness, and the required hardness can be designed according to the hardness requirement.

Drawings

FIG. 1 is a schematic view of a process for making a felt fiber layer of a permanent antistatic light felt conveyor belt according to the present invention;

FIG. 2 is a schematic structural view of a permanent antistatic light felt conveyor belt provided by the present invention;

FIG. 3 is a schematic view of the structure of the felt fiber layer of the permanent antistatic light felt conveyor belt provided by the invention;

wherein, 1, felt; 2. a PVC or PU layer; 3. a fabric layer; 11. a felt fiber layer; 12. a felt fabric layer.

Detailed Description

The present invention will be further specifically described with reference to the drawings and examples.

Example 1

As shown in figure 1, the application provides a permanent antistatic light felt conveyor belt, which is obtained by impregnating felt through a two-step method to obtain antistatic performance, polishing to obtain better appearance of the felt and attaching the felt to other materials. The preparation method comprises the following steps:

(1) the material is polyester staple fiber with the thickness of 4.0-4.5 mm and the air permeability of 220-260L/dm²A gram weight of 1000g/m at min²The felt (the felt is prepared by compounding a felt fiber layer and a felt fabric layer by adopting a needle punching method, the needle punching method is one of dry-method non-woven fabrics, short fibers are loosened, carded and paved into a fiber net, then the fiber net and the fabric layer are reinforced into the felt by the needle, the needle is provided with barbs, the fiber net is repeatedly punched, the barbs are reinforced by fibers to form the felt), and the felt layer is impregnated by a two-step method to obtain the felt layer, which specifically comprises the following steps:

soaking a carbon nano aqueous solution (carbon nano aqueous material: water: 60: 40) to enable the solution to completely permeate into felt, and drying for later use; the carbon nano water-based material is a uniform dispersion body which uniformly disperses carbon nano tubes in an aqueous solution, has conductive performance, generally has the solid content of about 2.5 percent, can be mutually soluble with water in any proportion (carbon nano particles are uniformly dispersed in liquid), can be mixed with water according to antistatic requirements, and can be used for waiting for solutions with different antistatic grades;

dipping a carboxylated styrene-butadiene latex solution (a carboxylated styrene-butadiene latex A, a carboxylated styrene-butadiene latex B, an accelerator, a curing agent and color paste of 85-90: 10: 15: 3-5: 2-4: 2-3), and drying to vulcanize the latex material; the carboxylic styrene-butadiene latex A/B is carboxylic styrene-butadiene latex with different hardness, the glass transition temperature Tg of the carboxylic styrene-butadiene latex A is-27 ℃, the glass transition temperature Tg of the carboxylic styrene-butadiene latex B is-35 ℃, and the required hardness can be designed according to the hardness requirement;

(2) polishing the fiber surface of the felt obtained in the step (1) to obtain a felt fiber layer, wherein the felt fiber layer has appearance requirements and ensures the flatness of the belt body;

(3) the polyester fabric is shaped in a high-temperature mode, so that the fabric is shrunk and cannot be shrunk in use, and the flatness of the fabric can be improved (for example, wrinkles influencing the flatness of a belt body are avoided to a great extent) to obtain a fabric layer;

(4) coating the fabric layer obtained in the step (3) with PVC/PU glue for two times, so as to meet the requirement of adhesive coating amount, and generally, the coating amount is large, and the peel strength is high;

(5) coating PU glue on the reverse side of the felt fiber layer obtained in the step (2), and bonding the felt fiber layer obtained in the step c) in a laminating manner to obtain the permanent antistatic light felt conveyor belt.

Preferably, after impregnation, the felt is pressed through a plurality of rollers to squeeze out the excess slurry.

The reason for adopting the two-step method is as follows: firstly, if the carbon nano water-based material is mixed with latex for use, the felt can block and attach the carbon nano particles to the surface of the felt like a filter, and when the felt is polished in the next working section, the carbon nano particles can run off along with the polishing materials, so that the felt does not have antistatic property or the antistatic effect is reduced. Secondly, dipping the carbon nano solution to enable the carbon nano particles to be uniformly dispersed in the felt to form a stroke net structure with antistatic performance, fixing the carbon nano particles on fibers by using latex, and enabling the carbon nano particles not to easily fall off when the conveyer belt is used, so that the permanent antistatic performance is ensured, and the carbon nano particles are prevented from polluting articles.

Effect test

The surface antistatic index measurements were made at various locations on the permanently antistatic light felt web made in the above example and the results are shown in table 1:

TABLE 1

As can be seen from the above table, the surface antistatic property is low, the antistatic effect is good, the surface felt is permanently antistatic, and the surface felt can keep good antistatic effect as long as the felt does not completely fall off or is damaged even if the felt surface is abraded.