WO2021103175A1

WO2021103175A1 - On-line hot laminating process for automobile sealing strip flocking belt

Info

Publication number: WO2021103175A1
Application number: PCT/CN2019/125086
Authority: WO
Inventors: 陈正林
Original assignee: 陈正林
Priority date: 2019-11-28
Filing date: 2019-12-13
Publication date: 2021-06-03
Also published as: CN110843268A

Abstract

Disclosed is an on-line hot laminating process for an automobile sealing strip flocking belt, belonging to the technical field of sealing strip flocking. After a sealing strip is vulcanized or cured, a flocking belt is subjected to hot lamination, wherein by utilizing the temperature of the vulcanized or cured sealing strip, the flocking belt is subjected to hot melt lamination such that not only is waste heat utilization beneficial to environmental protection and energy conservation achieved, but also on-line laminating in a sealing strip production process is realized, thereby decreasing the complexity of a subsequent flocking process, saving on a technological process, and reducing the cost. Moreover, compared with a sealing strip produced by using traditional electrostatic flocking, a sealing strip produced by using the hot laminating process is better in in terms of flocking effect and more uniform in terms of fluff coverage, the possibility of the friction force between the sealing strip and glass being increased due to non-uniform flocking during use is reduced, and noise of automobile glass in the lifting process is reduced.

Description

On-line thermal bonding process for flocking tape of automobile sealing strip

Cross-references to related applications

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on November 28, 2019, the application number is 2019111947968, and the invention title is "An online heat bonding process for automobile sealing strip flocking tape". The entire content of the application is approved. The reference is incorporated in this application.

Technical field

The invention belongs to the technical field of automobile sealing strip flocking, in particular to an on-line thermal bonding process for automobile sealing strip flocking tape.

Background technique

In the production of automobile sealing strips such as glass guide grooves and water-cut strips, flocking or flocking is required on the contact surface of the sealing strip and the glass to reduce the friction and noise of the glass lifting and improve the sealing and comfort of the car. The prior art adopts the process of on-line electrostatic flocking or off-line electrostatic flocking. There are two main types:

1. On-line electrostatic flocking. The disadvantage is that the existing seal factory uses oily flocking glue for on-line electrostatic flocking. Currently, there is no water-based glue on the market that can meet the requirements. Therefore, there are many toxic and harmful substances on the construction site and it is not environmentally friendly. , And the current flocking process is also complicated, especially when part of the cross-section shape is curved, there will often be leakage of glue and other phenomena, resulting in large scraps.

2. PE tape lamination + online electrostatic flocking. The disadvantage is that PE tape can only be attached to the bottom edge, not the lip edge. The bottom edge and the lip edge need to be combined with two processes, which is more cumbersome. At the same time, the PE tape Although the abrasion resistance is good, it is not resistant to high temperature, and the sealing effect is not good, which is easy to cause abnormal noise of the glass lifting.

Therefore, there is a need for a more environmentally friendly and easy-to-produce sealing strip flocking process, which can reduce costs and improve the flocking effect.

Summary of the invention

1. The technical problem to be solved by the invention

The purpose of the present invention is to solve the problems of poor flocking effect of the existing sealing strip flocking process, complex process, and insufficient environmental protection.

2. Technical solution

In order to achieve the above objective, the technical solution provided by the present invention is as follows:

The present invention provides an on-line thermal bonding process for flocking tapes of automobile sealing strips. After the sealing strips are vulcanized or cured, the flocking tapes are thermally bonded.

Preferably, it includes the following steps:

Step 1. Forming, extruding the material of the sealing strip from a high-temperature die to obtain the sealing strip;

Step two, vulcanize or cure, vulcanize or cure the sealing strip obtained by extrusion molding;

Step three, bonding, heat bonding the flocking tape and the vulcanized or cured sealing strip.

Preferably, the first step is specifically heating and melting the sealing strip compound and then extruding it through a die to obtain a flexible sealing strip with a shape.

Preferably, the second step is specifically that the soft sealing strip obtained by extrusion molding is heated to vulcanize or heat cured to obtain the required sealing strip with hardness and resilience.

Preferably, the step 3 is specifically that the flocking tape is thermally fused and bonded to the surface of the sealing strip with hardness and resilience using the vulcanization residual heat after vulcanization or the curing residual heat after curing to obtain a sealing strip with a flocked surface .

Preferably, the vulcanization in the second step is specifically to increase the hardness and elasticity of the flexible sealing strip by heating and vulcanization, and the heating temperature of the vulcanization is 120 to 350°C; the curing in the second step is specifically to increase the softness by heating and curing The hardness and elasticity of the sealing strip, the heating temperature for curing is 120～350℃

Preferably, the hot-melt bonding in the step 3 specifically involves pulling and pressing the flocking tape on the surface of the sealing strip, and the flocking tape is heated by the vulcanization waste heat after the sealing strip is cured or the curing waste heat after the sealing strip is cured. Heating, the back glue of the flocking tape is heated to melt and adhere to the surface of the sealing strip.

Preferably, the temperature at which the flocking tape in the third step is hot-melt bonded using the vulcanization waste heat after vulcanization is 80-290°C; the flocking tape in the third step is hot-melt bonded using the cured waste heat after curing. The combined temperature is 80～290℃

Preferably, the bonding speed of the thermal bonding process is 1 m/min to 35 m/min.

Preferably, when the vulcanized sealing strip and the flocking tape are thermally bonded, pressure is applied to the bonding surface of the sealing strip and the flocking tape, and the pressure range is 1.5-28N.

3. Beneficial effects

Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

The present invention is an on-line thermal bonding process for flocking tape of automobile sealing strips. After the sealing strip is vulcanized or cured, the flocking tape is thermally bonded, and the flocking tape is thermally fused using the temperature of the sealing strip after vulcanization or curing. It not only makes use of waste heat that is conducive to environmental protection and energy saving, but also realizes online bonding in the production process of sealing strips, which reduces the cumbersome process of subsequent flocking, saves the energy consumption of process procedures such as curing box electricity, and reduces cost. At the same time, compared to the sealing strip produced by the traditional electrostatic flocking, the sealing strip produced by the thermal bonding process has a better flocking effect, and the fuzz coverage is more uniform. During use, the possibility of increased friction with the glass caused by uneven flocking is reduced, and the noise of the car glass during the lifting process is reduced.

Description of the drawings

Fig. 1 is a flow chart of an on-line thermal bonding process for flocking tape of automobile weather strips according to the present invention.

Detailed ways

In order to enable those skilled in the art to better understand the solution of the application, the technical solutions in the embodiments of the application will be described clearly and completely in conjunction with the drawings in the embodiments of the application. Obviously, the described embodiments are only These are a part of the embodiments of this application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work should fall within the protection scope of this application.

It should be noted that the terms “first” and “second” in the specification and claims of the application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances for the purposes of the embodiments of the present application described herein. In addition, the terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to what is clearly listed. Those steps or units may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or equipment.

In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", The orientation or positional relationship indicated by "vertical", "horizontal", "horizontal", "longitudinal", etc. are based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit that the indicated device, element, or component must have a specific orientation, or be constructed and operated in a specific orientation.

In addition, some of the above terms may be used to indicate other meanings in addition to the orientation or position relationship. For example, the term "shang" may also be used to indicate a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

In addition, the terms "installed", "set", "provided", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediary, or between two devices, elements or components. Connectivity within the room. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in this application can be understood according to specific circumstances.

It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other if there is no conflict. Hereinafter, the present application will be described in detail with reference to the drawings and in conjunction with the embodiments.

Example 1

Referring to Figure 1, an online thermal bonding process for flocking tape of automotive weather strips in this embodiment, the flocking tape is thermally bonded after vulcanization or curing of the sealing strip, and the temperature of the sealing strip after vulcanization or curing is used to flock the flocking tape. The hot-melt bonding of the flock tape not only makes use of waste heat beneficial to environmental protection and energy saving, but also realizes online bonding in the production process of the sealing strip, which reduces the cumbersome process of subsequent flocking, saves process procedures and reduces costs. At the same time, compared to the sealing strip produced by the traditional electrostatic flocking, the sealing strip produced by the thermal bonding process has a better flocking effect, and the fuzz coverage is more uniform. During use, the possibility of increased friction with the glass caused by uneven flocking is reduced, and the noise of the car glass during the lifting process is reduced. In the process of use, the harmful VOC and harmful irritating gas content of the seal in the car is reduced.

The process of this embodiment includes the following steps:

Among them, the first step is specifically heating and melting the sealing strip rubber material and then extruding it through a die to obtain a flexible sealing strip with a shape.

Among them, the second step is specifically to heat vulcanize or heat cure the soft sealing strip obtained by extrusion to obtain the required hardness and resilience sealing strip, and the vulcanization specifically refers to increasing the hardness and elasticity of the soft sealing strip by heating and vulcanizing. The heating temperature of the vulcanization is 120-350°C. In this embodiment, 250°C is preferred. When the temperature of the flexible sealing strip is 250°C, the linear macromolecules in the flexible sealing strip transform into a three-dimensional network structure, so that The soft sealing strip gradually becomes harder, and at the same time the elasticity gradually rises, and finally a sealing strip with hardness and resilience is obtained. Curing specifically refers to improving the hardness and elasticity of the flexible sealing strip by heating and curing.

The heating temperature for curing in this embodiment is 120-350°C. In this embodiment, 250°C is preferred. During the curing process, the linear macromolecules in the flexible sealing strip transform into a three-dimensional network structure, so that the flexible sealing strip gradually changes Hard, while the elasticity gradually rises, and finally a sealing strip with hardness and resilience is obtained. Curing specifically refers to improving the hardness and elasticity of the flexible sealing strip by heating and curing.

Step 3 of this embodiment is specifically to use the vulcanization residual heat after vulcanization or the curing residual heat after curing to heat-melt and bond the flocking tape to the surface of the sealing strip with hardness and resilience to obtain a sealing strip with a flocked surface. Hot-melt bonding is specifically to pull and press the flocking tape on the surface of the sealing strip. The flocking tape is heated by the vulcanization residual heat after the sealing strip is cured or is heated by the curing residual heat after the sealing strip is cured, and the back glue of the flocking tape is heated. Melt and adhere to the surface of the sealing strip. The flocking tape uses the vulcanization waste heat after vulcanization for thermal fusion bonding at a temperature of 80～290℃, and the flocking tape uses the solidification waste heat after curing for thermal fusion bonding at a temperature of 80 ～290℃.

The bonding speed of the thermal bonding process in this embodiment is 1m/min～35m/min. When the bonding speed is too fast, the back glue of the flocking tape is not completely combined with the sealing strip and the bonding is completed. The effect is not good. When the bonding speed is too low, the temperature of the sealing strip that is not bonded after vulcanization or curing will decrease during bonding due to the slow bonding speed, making the backing of the flocking tape not better. Thermal melting causes the flocking belt and the flocking belt to not be tightly combined, and the effect cannot be achieved.

When the vulcanized sealing strip and the flocking tape of this embodiment are thermally bonded, pressure is applied to the bonding surface of the sealing strip and the flocking tape, and the pressure range is 1.5-28N.

In this embodiment, when the vulcanized or cured sealing strip is in contact with the flocking tape, since the sealing strip is heated to 250°C during the vulcanization or curing process, the heat of the sealing strip will be transferred to the flocking tape and the flocking tape will be transferred to the flocking tape. The temperature of the flocking tape rises to 200°C. At this time, the adhesive of the flocking tape is heated and melted into a molten state. The adhesive in the molten state is pressed on the bonding surface, and the adhesive in the molten state is squeezed and sealed under the pressure. The surface of the strip is in full contact, and the gap between the flocking tape and the sealing strip is filled and glued. The flocking tape and the sealing strip are firmer, and the flocking strip of the sealing strip fits more evenly and seals. During use, the strip will not cause noise due to the uneven fit between the flocking tape and the flocked surface and the car glass.

At the same time, the bonding speed of this embodiment is preferably 15m/min, so that the flocking tape and the sealing strip will not be tightly combined with the sealing strip due to the excessively fast bonding speed during the production process, and it will not be caused by the flocking tape and the sealing strip. If the bonding speed is too slow, the temperature of the flocking tape and the sealing strip is lowered, and the bonding of the flocking tape and the sealing strip is unstable.

The above-mentioned embodiments only express a certain embodiment of the present invention. The description is more specific and detailed, but it should not be construed as a limitation on the scope of the present invention; it should be pointed out that for those of ordinary skill in the art That is to say, without departing from the concept of the present invention, several modifications and improvements can be made, which belong to the scope of protection of the present invention; therefore, the scope of protection of the patent of the present invention should be subject to the appended claims.

Claims

An on-line thermal bonding process for flocking tapes of automobile sealing strips is characterized in that the flocking tapes are thermally bonded after the sealing strips are vulcanized or cured.
The on-line thermal bonding process for flocking tape of automobile weather strip according to claim 1, characterized in that it comprises the following steps:

Step 1. Forming, extruding the material of the sealing strip from a high-temperature die to obtain the sealing strip;

Step two, vulcanize or cure, vulcanize or cure the sealing strip obtained by extrusion molding;

Step three, bonding, heat bonding the flocking tape and the vulcanized or cured sealing strip.
The on-line heat bonding process for flocking automotive weather strips according to claim 2, characterized in that: the step one is specifically heating and melting the sealing strip rubber material and then extruding it through a die to obtain a soft shape. Sexual sealing strip.
The on-line thermal bonding process for automobile sealing strip flocking tape according to claim 2, characterized in that: the step two is specifically that the soft sealing strip obtained by extrusion molding is heated to vulcanize or heat to obtain the desired The sealing strip with hardness and resilience.
The on-line thermal bonding process for automobile sealing strip flocking tape according to claim 2, characterized in that: the step three is specifically to heat the flocking tape using vulcanization waste heat after vulcanization or curing waste heat after curing. It is attached to the surface of the sealing strip with hardness and resilience to obtain a sealing strip with a flocked surface.
According to claim 4, an on-line heat bonding process for flocking strips of automotive weather strips, characterized in that: the vulcanization of the second step is specifically to increase the hardness and elasticity of the soft weather strips by heating and vulcanizing, and the vulcanized The heating temperature is 120-350°C; the curing in the second step is specifically to increase the hardness and elasticity of the flexible sealing strip by heating and curing, and the heating temperature of the curing is 120-350°C
The on-line heat bonding process for flocking tape of automobile weather strip according to claim 5, characterized in that: the hot-melt bonding in step 3 is specifically pulling and pressing the flocking tape on the surface of the weather strip , The flocking tape is heated by the vulcanization residual heat after the sealing strip is vulcanized or is heated by the curing residual heat after the sealing strip is cured, and the back glue of the flocking tape is heated to melt and adhere to the surface of the sealing strip.
According to claim 5, an on-line thermal bonding process for flocking tape for automobile weather strips, characterized in that the temperature at which the flocking tape in step 3 is thermally fused and bonded using vulcanized waste heat after vulcanization is 80~ 290℃; the temperature of the flocking tape in the third step is 80～290℃ for hot-melt bonding using the solidified waste heat after curing.
The on-line thermal bonding process for flocking strips of automobile weather strips according to any one of claims 1-8, wherein the bonding speed of the thermal bonding process is 1m/min to 35m/min.
The on-line thermal bonding process for flocking tape of automobile weather strip according to claim 9, characterized in that: when the vulcanized sealing strip and flocking tape are thermally bonded, the sealing strip and the flocking tape are bonded together The surface is under pressure, and the range of the pressure is 1.5-28N.