CN1520985A - Method and device for manufacturing fluorine resin composite board - Google Patents

Abstract

A method for preparing composite board of fluorine resin and its apparatus, mainly utilize the radiant heat source to illuminate the fluorine resin board and glass fiber cloth to the temperature above the melting point of fluorine resin, and then through the temperature control roller train in the apparatus, the pressure fit fluorine resin board and glass fiber cloth, make the above-mentioned material weld and combine into the composite board of fluorine resin; in addition, the process is that under the condition of low tension, the single side of the fluorine resin plate is locally heated to the temperature above the melting point of the fluorine resin, so as to reduce the negative factors of the influence of heat and stress on the characteristics of the fluorine resin and obtain the fluorine resin composite plate with the optimal performance.

Description

Fluorine resin composite sheet manufacturing method and device thereof

technical field

The invention relates to a manufacturing method and a device for a fluororesin composite plate.

Background technique

Due to its excellent temperature resistance, chemical corrosion resistance, and high-purity cleanliness, fluororesin is very suitable for the production, storage, and transportation of high-purity chemicals in modern industries; such as semiconductor products. The high-tech industry has very strict and high standards for the purity of the chemicals used and the cleanliness of the containers containing these chemicals.

Common fluorine resin materials include polytetrafluoroethylene (PTFE), tetrafluoroethylene and perfluoropropyl vinyl ether copolymer (PFA), tetrafluoroethylene and hexafluoropropylene copolymer (PEP), tetrafluoroethylene Ethylene and ethylene copolymer (ETFE), polychlorotrifluoroethylene (PCTFE), tetrafluoroethylene and ethylene copolymer (ETFE), trifluoroethylene and ethylene copolymer (ECTFE), polyvinylidene fluoride (PVDF), etc. All kinds of fluorine resins are made into plates to store chemicals, so as to achieve corrosion resistance and maintain the high purity quality of chemicals. Its main flaws are:

Due to the excellent low surface tension anti-adhesive properties of fluororesin itself, it causes troubles when it is bonded and fixed to the equipment substrate.

Contents of the invention

The main purpose of the present invention is to provide a manufacturing method and device for a fluororesin composite plate, which mainly utilizes a radiant heat source to irradiate the fluororesin plate and glass fiber cloth to a temperature above the melting point of the fluororesin, and then passes through the temperature in the device. The control roller group presses the fluororesin sheet and glass fiber cloth to weld and combine it into a fluororesin composite sheet, and the process is under low tension conditions, and one side of the fluororesin sheet is locally heated to a temperature above the melting point of the fluororesin , reduce the negative factors of heat and stress on the properties of fluororesin, and achieve the purpose of obtaining fluororesin composite plates with the best performance.

Another object of the present invention is to provide a method for manufacturing a fluororesin composite plate and its device, and to provide the fluororesin plate with another interface to be adhered and fixed to the base material of the equipment, so as to improve the bond between the fluororesin and the base material. Purpose of bonding relationship.

The object of the present invention is achieved in this way: a method for manufacturing a fluororesin composite plate, comprising fusing the fluororesin plate with another medium to form a composite plate, characterized in that it includes the following steps:

(1) Put the fluororesin sheet and the medium into the preheating zone together, and use a low-temperature heat source to heat all the materials evenly under low tension conditions to avoid residual stress on the fluororesin sheet, and after the fluororesin sheet is preheated , the temperature of the material must be controlled below the melting point of the fluororesin;

(2) Guide the preheated fluororesin plate to the melting zone together with the medium through the guide wheel, heat it on one side with a high-temperature heat source, and under low tension conditions, make one side of the fluororesin plate partially heated to the melting point of the fluororesin The above temperature makes the fluororesin sheet weldable;

(3) After the composite material has been heated at high temperature, it is guided to the pressing area by the rollers, and the temperature-controlled roller group in the pressing area is used to implement the welding auxiliary pressing of the composite material, and at the same time cooperate with the tempering treatment to avoid compounding. Plate residual stress, and at the same time control the crystallinity of the fluororesin composite plate.

It also includes: the pressed fluororesin composite sheet is transported to the quality inspection area, and the rollers of the high-voltage leakage detection device are used to detect whether there are pores or holes in the fluororesin composite sheet.

It also includes: the inspected fluororesin composite board, through the lamination roller in the packaging area, the single-sided film lamination operation of the polyvinyl chloride film is carried out, and then the finished product is coiled by the coiling wheel.

The medium is glass fiber cloth. The heat source of the preheating zone is radiation irradiation at low temperature. The heat source temperature setting value in the preheating zone is adjusted according to the thickness of the fluororesin sheet and the production speed of the process. The heat source of the melting zone is the irradiation of high temperature radiation.

The present invention also provides a manufacturing device for a fluororesin composite plate, which is characterized in that it includes the following components in sequence: one roll is provided with a tension adjusting shaft seat for the fluororesin plate and the other is provided with a Tension adjustment shaft seat for fused dielectric material;

Rollers for guiding the output of each material;

a first guide wheel for gathering said materials;

A preheating furnace is installed in the preheating zone;

second guide wheel;

In the fusion zone, there are high-temperature radiation heaters on the upper and lower floors, upper and lower rollers, hot air fans for shaping, and most temperature-controlled roller groups for auxiliary pressing;

a finished take-up wheel;

The preheated fluororesin composite plate is guided by the second guide wheel into the fusion zone, and the high-temperature heater on the upper layer of the fusion zone, under the condition of low tension, heats the outer side of the fluororesin plate locally to fluorine through high-temperature radiation irradiation on the outside. The temperature above the melting point of the fluororesin; Among them, the surface temperature of the upper roller in contact with the fluororesin plate must be controlled so that the surface temperature of the upper roller must be controlled below the melting point of the fluororesin. After the fluororesin plate leaves the upper high-temperature radiation heater , before entering the lower roller, use a hot air blower to heat the surface of the glass fiber cloth, so that the temperature of the glass fiber cloth reaches the same temperature as the fluororesin sheet, and the lower roller is also heated to the melting point of the fluororesin through the lower high-temperature radiation heater, so that Fluorine resin and glass fiber cloth are in a weldable state.

A high-voltage leakage detection device roller set is connected behind the fusion zone to detect whether the fluororesin composite plate has pores or holes.

Between the fusion zone and the finished product take-up wheel, there is a roll of tension adjustment shaft seat with PVC film and its driving roller, so that the inspected fluororesin composite plate can be coated with PVC film on one side by the film roller. Film pasting operation, and then take up the finished product by the take-up wheel.

Further description will be provided below in combination with preferred embodiments and accompanying drawings.

Description of drawings

Fig. 1 is a schematic diagram of the process of producing a fluororesin composite plate by the device of the present invention.

Detailed ways

As shown in Figure 1, the device used in the manufacture of fluororesin composite plates of the present invention includes in sequence:

A roll of tension adjusting axle seat 11 provided with fluororesin sheet material, a roll of tension adjusting axle seat 21 provided with fluororesin film, and a roll of tension adjusting axle seat 31 provided with glass fiber cloth;

Rollers 12, 22, 32 for guiding the output of each material;

a first guide wheel a for gathering the materials;

A preheating furnace 5 is provided with an upper radiation heater 51 and a lower radiation heater 52;

second guide wheel b;

High-temperature radiation heaters 61, 62 on the upper and lower floors;

The third guide wheel group c includes upper and lower rollers c1, c2; a hot air blower 7 is used for shaping;

scroll wheel d;

Most temperature control roller sets d1, d2, d3, d4 for transmission;

High voltage leakage detection device roller group e1, e2;

The tension adjustment shaft seat 8 and its transmission rollers 81, 82 are provided with PVC film;

Finished take-up wheel 9;

Its manufacturing method and steps include:

1. Install materials such as fluororesin plate 10, fluororesin film 20 (PFA or FEP film, PTFE composite plate) and glass fiber cloth 30 on individual tension adjustment shafts in the preparation area in the order shown in Figure 1. Seats 11, 21, 31;

2. The materials 11, 21 and 31 installed in order are guided by the rollers 12, 22 and 32 respectively and assembled together, and enter the preheating zone through the first guide wheel a. There is an upper layer in the preheating furnace 5 used in the preheating zone The radiant heater 51 and the lower radiant heater 52 can be adjusted respectively according to the material specifications; wherein, the heat source temperature setting value of the preheating furnace 5 is adjusted according to factors such as the thickness of the fluororesin plate and the production speed of the process, and the fluorine After the plain resin plate is preheated, the temperature of the material must be controlled below the melting point of the fluorine resin;

3. The preheated composite material enters the melting zone through the second guide wheel b, and the semicircular high-temperature radiation heater 61 on the upper layer of the melting zone is irradiated from the outside under low tension conditions to make the outside of the fluororesin plate 10 Partial heating to a temperature above the melting point of the fluororesin; among them, the surface temperature of the upper roller c1 of the third roller group c in contact with the fluororesin plate 10 must be controlled so that the surface temperature of the upper roller c1 must be controlled below the melting point of the fluororesin After the fluororesin plate leaves the upper semicircular high-temperature radiation heater 61 and before entering the lower roller c1, a hot air blower 7 can be used to heat the surface of the glass fiber cloth 30, so that the temperature of the glass fiber cloth 30 also reaches the temperature of the fluororesin plate. 10 at the same temperature, and the lower roller c2 is also heated to the melting point of the fluorine resin through the lower semicircular high-temperature radiation heater 62, so that the fluorine resin 10 and the glass fiber cloth 30 can be welded together; as for the upper roller c1 The gap control between the lower roller c2 is based on the thickness of the final fluororesin composite sheet, so that all materials can get the best welding effect under this condition;

4. After heating, the composite materials 10, 20, 30 are guided to the pressing area by the roller d, and the temperature-controlled roller groups d1, d2, d3, and d4 in the pressing area are used to perform composite material welding and auxiliary pressing, and cooperate with the implementation Tempering treatment to avoid residual stress of the composite sheet, and at the same time control the crystallinity of the fluororesin composite sheet;

5. The pressed fluororesin composite sheet is transported to the quality inspection area. In the quality inspection area, the rollers e1 and e2 of the high-voltage leakage detection device can be used to detect whether there are pores or holes in the fluororesin composite sheet. defect phenomenon;

6. The inspected fluororesin composite board 91 passes through the lamination rollers 81 and 82 in the packaging area, and performs the single-side lamination operation of the PVC film 8a, and is then taken up by the take-up wheel 9 to complete the whole process.

In the above method, taking the actual production of 2.5mm PTFE fluororesin composite sheet as an example, the parameters can be preset as follows:

PTFE sheet 10 thickness: 2mm;

PFA film 20 thickness: 0.127mm;

Glass fiber cloth 30 thickness: 0.5mm;

Tension adjustment axle seat 11, 21, 31 tension: 150Kg;

The temperature setting value of the upper radiation heater 51 of the preheating furnace: 300°C;

The temperature setting value of the lower radiation heater 52 of the preheating furnace: 250°C;

The temperature setting value of the semicircular high-temperature radiation heater 61 on the upper layer of the melting zone: 400°C;

The temperature setting value of the semicircular high-temperature radiation heater 62 in the lower layer of the melting zone: 360°C;

The temperature setting value of the upper roller c1 in the melting zone: 300°C;

The temperature setting value of c2 of the lower roller in the melting zone: 330°C;

The setting value of the gap between the upper roller c1 and the lower roller c2 in the melting zone: 2.5mm;

Temperature setting value of hot air blower 7 in melting zone: 400°C;

The temperature setting value of the temperature control roller d in the pressing area: 330°C;

The temperature setting value of the temperature control roller d1 in the pressing area: 300°C;

The temperature setting value of the temperature control roller d2 in the pressing area: 250°C;

The temperature control rolling d3 temperature setting value in the pressing area: 80°C;

The temperature setting value of the temperature control roller d4 in the pressing area: 20°C;

High-voltage leakage detection device roller e1, e2 detection setting value in the quality inspection area: DC20000v;

PVC film 8a thickness: 0.3mm;

Process feeding speed: 5M/Hr;

According to the above process, the 2.5mm PTFE fluororesin composite sheet can be obtained with the following physical properties:

(1) Specific gravity: 2.174 (the specific gravity of the original PTFE sheet is 2.182).

(2) Peel strength value between PTFE sheet and glass fiber cloth: 21.9N/cm.

In this way, the manufacturing method of the present invention can obtain a composite plate material in which the fluororesin plate material and the glass fiber cloth are welded together, thereby increasing the firmness of bonding between the plate material and the base material of the equipment.

The above-mentioned embodiments are only preferred states derived from the technical features of the present invention, and are not intended to limit the present invention. All other similar structures, materials or simple design changes used should fall within the protection scope of the present invention Cover included.

Claims (10)

1. A method for manufacturing a fluororesin composite plate, comprising fusing the fluororesin plate with another medium to form a composite plate, characterized in that it includes the following steps: (1) Put the fluororesin sheet and the medium into the preheating zone together, and use a low-temperature heat source to heat all the materials evenly under low tension conditions to avoid residual stress on the fluororesin sheet, and after the fluororesin sheet is preheated , the temperature of the material must be controlled below the melting point of the fluororesin; (2) Guide the preheated fluororesin plate to the melting zone together with the medium through the guide wheel, heat it on one side with a high-temperature heat source, and under low tension conditions, make one side of the fluororesin plate partially heated to the melting point of the fluororesin The above temperature makes the fluororesin sheet weldable; (3) After the composite material has been heated at high temperature, it is guided to the pressing area by the rollers, and the temperature-controlled roller group in the pressing area is used to implement the welding auxiliary pressing of the composite material, and at the same time cooperate with the tempering treatment to avoid compounding. Plate residual stress, and at the same time control the crystallinity of the fluororesin composite plate. 2. The manufacturing method of fluororesin composite sheet according to claim 1, characterized in that: it also includes: the fluororesin composite sheet that has been pressed is transported to the quality inspection area, and is picked up by high-voltage leakage The roller of the measuring device is used to detect whether there are pores or holes in the fluororesin composite sheet. 3. The manufacturing method of the fluororesin composite board according to claim 2, characterized in that it also includes: the inspected fluororesin composite board is passed through the film roller in the packaging area to carry out the single-layering of the polyvinyl chloride film. The surface film is applied, and then the finished product is coiled by the coiling wheel. 4. The manufacturing method of fluororesin composite board according to claim 1, characterized in that: the medium is glass fiber cloth. 5. The manufacturing method of fluororesin composite board according to claim 1, characterized in that: the heat source in the preheating zone is low-temperature radiation irradiation. 6. The manufacturing method of fluororesin composite sheet according to one of claims 1 or 5, characterized in that: the heat source temperature setting value in the preheating zone is determined according to the thickness of the fluororesin sheet and the production speed of the process Adjustment. 7. The manufacturing method of fluororesin composite plate according to claim 1, characterized in that: the heat source of the melting zone is the irradiation of high temperature radiation. 8. A manufacturing device for fluororesin composite boards, characterized in that it includes the following components in sequence: One roll is provided with the tension adjustment shaft seat of the fluororesin plate and the other is provided with the tension adjustment shaft seat of the medium material fused with the fluororesin plate; the rollers for guiding the output of the various materials; the assembly of the various materials The first guide wheel; a preheating furnace is installed in a preheating zone; the second guide wheel; a fusion zone is equipped with high-temperature radiation heaters on the upper and lower layers, upper and lower rollers, and hot air blowers for shaping, most of which are for auxiliary A set of temperature-controlled rollers for pressing; a coiling wheel for finished products; The preheated fluororesin composite plate is guided by the second guide wheel into the fusion zone, and the high-temperature heater on the upper layer of the fusion zone, under the condition of low tension, heats the outer side of the fluororesin plate locally to fluorine through high-temperature radiation irradiation on the outside. The temperature above the melting point of the fluororesin; Among them, the surface temperature of the upper roller in contact with the fluororesin plate must be controlled so that the surface temperature of the upper roller must be controlled below the melting point of the fluororesin. After the fluororesin plate leaves the upper high-temperature radiation heater , before entering the lower roller, use a hot air blower to heat the surface of the glass fiber cloth, so that the temperature of the glass fiber cloth reaches the same temperature as the fluororesin sheet, and the lower roller is also heated to the melting point of the fluororesin through the lower high-temperature radiation heater, so that Fluorine resin and glass fiber cloth are in a weldable state. 9. The manufacturing device of fluororesin composite sheet according to claim 8, characterized in that: the fusion zone is followed by a high-voltage leakage detection device roller set, which is used to detect whether the fluororesin composite sheet has pores or breaks. Hole blemishes. 10. The manufacturing device of fluororesin composite board according to claim 8, characterized in that: between the fusion zone and the finished product take-up wheel, there is a roll of tension adjustment shaft seat with PVC film and its driving roller , so that the inspected fluororesin composite sheet is applied to one side of the polyvinyl chloride film by the laminating roller, and then coiled by the coiling wheel to be a finished product.