TWI401345B - Method for manufacturing core yarn - Google Patents

Description

Core wire manufacturing method

The present invention relates to a method of manufacturing a core wire, and more particularly to a method of manufacturing a high rigidity core wire suitable for a drive belt.

Industrial progress, a variety of large-scale machinery or vehicles developed, many of the engines of the machine or vehicle to drive the belt to achieve the transmission purpose.

In order to adapt to the various rotation modes and speeds of the engine, the rigidity and strength of the transmission belt are one of the most important considerations. At present, in order to improve the strength of the transmission belt, in the process of the transmission belt, a core wire is added into the base material of the transmission belt, and the strength of the transmission belt is assisted and strengthened by the core wire.

In order to increase the strength, the core wire is mostly twisted with high-rigidity and low-deformation fibers to reduce the possibility of deformation of the transmission belt, and in order to make the core wire fully function in the transmission belt, most of the surface treatment agent containing toluene The core wire is processed so that the core wire can be tightly coupled with the substrate of the drive belt, so that when the drive belt is used, the core wire is separated from the drive belt, causing the drive belt to break or be damaged.

However, the conventional surface treatment method can only achieve the bonding strength between the surface of the core wire and the transmission belt, but fails to increase the strength of the fiber bundle between the core wires. Therefore, when the transmission belt is trimmed and ground, the core wire is Will open along the trimming position and hairiness, which affects the subsequent state of the core wire and the drive belt, so that the core wire is easily separated from the drive belt from the trimming position, thus reducing the efficiency and service life of the drive belt.

Furthermore, the surface treatment agent containing toluene has environmental concerns and harmful effects on the human body, and a surface treatment agent containing toluene is used in the process. If it is improperly recycled, it will have ecological and human health effects, and the transmission belt It will generate high temperature during use and will also release gas containing toluene, which is harmful to human body for a long time. Therefore, how to improve the bonding strength between the core wire and the transmission belt, and how to improve the damage caused by toluene is an urgent problem to be solved.

In view of the above-mentioned problems, it is an object of the present invention to provide a core wire manufacturing method for solving the problem of poor bonding strength between fiber bundles of a conventional core wire and between a core wire and a drive belt substrate, and further improving the inclusion. The defect that the treatment agent of toluene causes harm to the human body or the environment.

According to an object of the present invention, a core wire manufacturing method is provided, comprising the steps of: kneading a plurality of yarns to form an untreated core wire; impregnating the untreated core wire with an aqueous treating agent to form the untreated core wire into a first a core wire; impregnating the first core wire with a latex treatment agent to form the second core wire; and performing a heat extension molding process on the second core wire to form the core wire.

Among them, the yarn is composed of highly rigid fibers, and the high-rigidity fibers include polyester fibers or aromatic polyamide fibers.

The aqueous treatment agent is an aqueous thermosetting polyurethane type interface treatment agent, and the aqueous treatment agent has a solid content of 26% to 36%, a viscosity system of 930 to 1100 cps, and a concentration of 3 to 6 weight. percentage. And the impregnation rate of the first core wire is between 1% and 14%.

The preparation method of the latex treatment agent comprises: dissolving a resorcinol resin in a pure water to form a first solution; adjusting the pH value of the first solution to a predetermined pH value, and simultaneously stirring, The first solution is formed into a second solution; a bridging agent is added to the second solution, and simultaneously stirred to form a third solution; the third solution is allowed to stand; and a latex is added to be allowed to stand. The third solution is then formed to form a latex treatment agent.

Wherein, the predetermined pH of the second solution is 10±0.3, and the bridging agent is formaldehyde. Further, the weight percentages of the pure water, resorcinol resin and formaldehyde of the third solution are 81% to 87%, 8% to 9%, and 4% to 11%, respectively.

Among them, the latex is made of Vinyl Pyridine latex (VP latex), Styrene Butadiene Rubber (SBR latex) and Chlorosulfonated Polyethylene latex (CSM latex). Composed of.

Wherein, the extension tension of the heat extension forming process is at least equal to or greater than 60 kg, and the heating temperature is between 200 ° C and 250 ° C.

As described above, the core wire manufacturing method according to the present invention may have one or more of the following advantages:
(1) According to the core wire manufactured by the core wire manufacturing method, the latex treatment agent can be immersed between the yarns by the aqueous treating agent to strengthen the bonding strength between the yarns of the core wire, thereby cutting the transmission belt in the process of the transmission belt. When edged and ground, the core wire that is cut or ground does not bloom or hairiness.

(2) The core wire manufactured by the core wire manufacturing method improves the ability of the core wire surface to adsorb the latex treatment agent by the aqueous treatment agent, and further improves the adhesion strength between the core wire and the transmission belt by the latex treatment agent, so that the core wire is not easily separated from the transmission belt. Further, the physical properties of the core wire can be sufficiently exhibited.

Please refer to FIG. 1 , which is a flow chart of a method for manufacturing a core wire according to the present invention. The steps include:
(S10) kneading a plurality of yarns to form an untreated core wire;
(S20) impregnating the untreated core wire with an aqueous treating agent to form the untreated core wire into a first core wire;
(S30) impregnating the first core wire with a latex treatment agent to form the first core wire to form a second core wire;
(S40) performing a heat extension molding process on the second core wire to form the second core wire into a core wire.

Please refer to FIG. 2, which is a schematic view of the untreated core of the present invention. In the figure, the untreated core wire 10 is formed by twisting a plurality of yarns 101, and each yarn 101 is formed by twisting a plurality of high-rigidity fibers 1011. In the present embodiment, the untreated core 10 is formed by twisting three yarns 101, but it is not limited thereto, and the number of the yarns 101 may be increased or decreased as needed. In the present embodiment, the high-rigidity fiber 1011 is represented by a polyester fiber or an aromatic polyamide fiber, but is not limited thereto.

Please refer to FIG. 3, which is a schematic diagram of the impregnation process of the present invention. The first impregnation tank 21 and the second impregnation tank 31 are included, and the first impregnation tank 21 is filled with the aqueous treatment agent 22, and the second impregnation tank 31 is filled with the latex treatment agent 32. The untreated core wire 10 passes through the first impregnation tank 21, adsorbs the aqueous treatment agent 22 to form the first core wire 11, and the first core wire 11 passes through the second impregnation tank 31 to adsorb the latex treatment agent 32 to form the second core wire 12.

In the present embodiment, the aqueous treatment agent 22 is represented by an aqueous thermosetting polyurethane type interface treatment agent, and the aqueous treatment agent 22 has a solid content of 30%, a viscosity of 1000 cps, and a concentration of 5% by weight. And the impregnation rate of the first core wire is 12%, but not limited thereto.

Please refer to FIG. 4, which is a flow chart of the preparation of the latex treatment agent of the present invention. The latex treatment agent 32 shown in Fig. 3 is prepared by the method as shown in Fig. 4, and the steps thereof include:
(S31) dissolving a resorcinol resin in a pure water to form a first solution;
(S32) adjusting the pH value of the first solution to a predetermined pH value, and simultaneously stirring, so that the first solution forms a second solution;
(S33) adding a bridging agent to the second solution, and simultaneously stirring, so that the second solution forms a third solution;
(S34) leaving the third solution; and
(S35) A latex is added to the third solution after standing to form a latex treatment agent.

In this embodiment, wherein the predetermined pH value of the step (S32) is 9.7 is weakly alkaline, and the additive for adjusting the pH value of the first solution in the step (S32) is sodium hydroxide (NaOH), the step ( The bridging agent of S33) is formaldehyde, the standing time of step (S34) is two hours, and the latex added in step (S35) is composed of VP latex, SBR latex and CSM latex, and pure water and m-benzene. The ratio of diphenol resin to formaldehyde is 10:1:0.82, while the weight percentages of VP latex, SBR latex and CSM latex relative to the third solution are 56%, 20% and 20%, respectively, but this is not limit.

Please refer to FIG. 5, which is a schematic diagram of the heat extension of the present invention. The second core wire 12 enters the heat treatment device 40 and applies a stable extension pulling force to the second core wire 12 to shape the second core wire 12 into the core wire 13. In the present embodiment, the heat treatment device 40 is represented by an oven, and the heat treatment temperature is represented by 220 ° C, the extension tensile force is represented by 60 kg, and the traveling speed of the second core wire 12 in the heat treatment device 40 is 60-80 Feet/minute, but not limited to this.

The impregnation process as shown in Fig. 3 causes the aqueous treatment agent 22 to enter between the yarns 101 of the untreated core 10 and the fibers 1011, thereby reinforcing the strength of each of the fibers 1011 and the respective yarns 101, and allowing the latex to be applied. The adhesion of the treatment agent 32 to the second core wire 12 is stronger, further bringing the strength between the core wire 13 and the drive belt (not shown) to 9 to 20 kgf. Due to the increase of the strength, when the drive belt is trimmed or high-speed wedged, the cut core wire 13 does not bloom, and the hairiness is not lifted, so that the core wire 13 provided on the transmission belt can fully exert its physical properties.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

10‧‧‧Untreated core wire

101‧‧‧Yarn

1011‧‧‧High rigidity fiber

11‧‧‧first core

12‧‧‧second core wire

13‧‧‧core

21‧‧‧First impregnation tank

22‧‧‧Water treatment agent

31‧‧‧Second impregnation tank

32‧‧‧Latex treatment agent

40‧‧‧ Heat treatment unit

S10, S20, S30, S31, S32, S33, S34, S40‧‧

Figure 1 is a flow chart of a method for manufacturing a core wire of the present invention;
Figure 2 is a schematic view of the untreated core of the present invention;
Figure 3 is a schematic view of the impregnation process of the present invention;
Fig. 4 is a flow chart showing the preparation of the latex treating agent of the present invention; and Fig. 5 is a schematic view showing the heat extending setting of the present invention.

S10, S20, S30, S40‧‧‧ steps

Claims (10)

A core wire manufacturing method for manufacturing a core wire, and the core wire is suitable for a transmission belt, and the core wire manufacturing method comprises the following steps:
Combining a plurality of yarns to form an untreated core wire;
Immersing the untreated core wire with an aqueous treating agent to form the untreated core wire into a first core wire;
The first core wire is impregnated with a latex treatment agent to form a second core wire; and the second core wire is subjected to a heat extension forming process by a heat treatment device, so that the second core wire forms the core wire. The method of manufacturing a core wire according to claim 1, wherein the yarn is composed of a high-rigidity fiber, and the high-rigidity fiber comprises a polyester fiber or an aromatic polyamide fiber. The method for manufacturing a core wire according to claim 1, wherein the aqueous treatment agent is an aqueous thermosetting polyurethane type interface treatment agent, and the solid content of the aqueous treatment agent is between 26% and 36%, and the viscosity system is Between 930 and 1100 cps and a concentration between 3 and 6 weight percent. The core wire manufacturing method according to claim 3, wherein the first core wire has an impregnation rate of from 1% to 14%. The method for manufacturing a core wire according to claim 1, wherein the method for preparing the latex treatment agent comprises:
Dissolving a resorcinol resin in a pure water to form a first solution;
Adjusting the pH value of the first solution to a predetermined pH value while stirring, so that the first solution forms a second solution;
Adding a bridging agent to the second solution while stirring, so that the second solution forms a third solution;
The third solution is allowed to stand; and a latex is added to the third solution after standing to form the latex treatment agent. The method of manufacturing a core wire according to claim 5, wherein the predetermined pH value is 10 ± 0.3. The method of manufacturing a core wire according to claim 5, wherein the bridging agent is formaldehyde. The method for manufacturing a core wire according to claim 7, wherein the third solution has a weight percentage of the pure water, the resorcinol resin, and the formaldehyde of 81% to 87% and 8% to 9%, respectively. 4% to 11%. The method of manufacturing a core wire according to claim 5, wherein the latex is composed of vinyl acridine latex, styrene-butadiene rubber latex, and chlorosulfonated polyethylene latex. The method of manufacturing a core wire according to claim 1, wherein the extension of the heat-stretching process is at least equal to or greater than 60 kg, and the heating temperature is between 200 ° C and 250 ° C.