WO2018000552A1

WO2018000552A1 - Method for fabricating greenhouse film

Info

Publication number: WO2018000552A1
Application number: PCT/CN2016/095911
Authority: WO
Inventors: 梅未; 甘汉南
Original assignee: 伯恩太阳能科技有限公司
Priority date: 2016-06-29
Filing date: 2016-08-18
Publication date: 2018-01-04
Also published as: CN106142535B; CN106142535A

Abstract

A method for fabricating a greenhouse film, the method comprising: under the action of a traction force, having a plurality of plastic pressing film stripes (1) and plastic films (2) sequentially move synchronously towards each process, the plurality of plastic pressing film stripes (1) being in a parallel arrangement and the plastic pressing film stripes (1) being in a flat shape; each piece of the plastic pressing film stripes (1) and the plastic films (2) are subjected to a thermal composite process to receive a thermal composite treatment, the heating temperature on the side of each piece of the plastic pressing film stripes (1) being between 220℃ and 240℃; the heating temperature on the side of each piece of the plastic films (2) is between 160℃ and 190℃, each piece of the plastic pressing film stripes (1) is thermal composited with the plastic films (2) to form an integral body, which is then subjected to a cooling treatment to obtain a corresponding greenhouse film. The method improves the binding fastness performance between a plastic pressing film and a plastic film, thereby improving the tensile strength performance of a greenhouse.

Description

Method for manufacturing greenhouse film

Technical field

The invention relates to a method for manufacturing a greenhouse film, and belongs to the technical field of agricultural materials.

Background technique

Agricultural greenhouse technology has been widely used in agricultural production in most parts of China, and plastic film is commonly used in agricultural greenhouses. However, due to the soft material of plastic film, the tensile strength is relatively poor, when used in greenhouses. Due to the large area of the greenhouse film, it is easy to cause damage, resulting in poor practical use. Therefore, existing greenhouse films are mostly supported by means of a rigid skeleton. On the other hand, since the greenhouse film is often repeatedly pulled or tensioned during use and construction, the single plastic film is relatively inferior in tensile strength and softness, and it is difficult to be tightened, and the force is too strong. On the contrary, the greenhouse film will be damaged. Therefore, in order to improve the strength and tensile strength of the greenhouse film, the overall performance of the greenhouse film is generally improved by providing a plurality of cable films on the greenhouse film, so that it can be used not only by repeated pulling but also by the greenhouse film. The use area is larger. For example, a Chinese patent application (Publication No.: CN104855178A) discloses a method for heat sealing a cable film, which comprises disposing the bottom plastic film on a working surface; then placing a cable on the bottom plastic film, and then pulling the cable The surface is covered with a plastic film on the surface, and the surface plastic film or the surface plastic film and the bottom plastic film are heated simultaneously on both sides of the cable, and the surface plastic film and the bottom plastic film are pressed, so that the surface plastic film and the bottom plastic film are in the cable. The two sides are in close contact, combined with heat and pressure, and after cooling, they are formed into a unitary structure. Although the method reinforces the tensile properties of the plastic film to some extent by laminating a plurality of mutually parallel cables on the plastic film, however, since it is only by using two layers of plastic film, the cable is tight. Wrapped, the cable is slidable, pulling the cable At the same time, the plastic film cannot be driven at the same time. If the film of the greenhouse is partially wrinkled or uneven during use, the plastic film itself needs to be pulled to remove the wrinkles or uneven parts. Therefore, the problem of poor pull resistance still exists; Since the overall area of the film is relatively large, it is difficult to convey or pull during the manufacturing process, and the use of the multilayer film makes the processing process more complicated, and the requirements for the setting are correspondingly improved, which is not conducive to practical operation and the like.

Summary of the invention

The present invention is directed to the defects existing in the prior art, and provides a method for fabricating a greenhouse film, which solves the problem of how to simplify the operation and improve the bonding force between the lamination tape and the film and the tear resistance of the film.

The object of the present invention is achieved by the following technical solution, a method for manufacturing a greenhouse film, the method comprising the following steps:

The plurality of plastic laminating strips and the plastic film are sequentially moved synchronously toward each process under the action of the traction force, the plurality of plastic laminating strips are arranged in parallel, and the plastic laminating strips are flat, so that each strip The plastic laminating tape is thermally composited with the plastic film through a thermal lamination process, and the heating temperature of each plastic laminating tape side is 220 ° C to 240 ° C; the heating temperature of each plastic film side is 160 ° C to 190 °C, so that each plastic laminating tape is thermally combined with the plastic film, and then moved to the next process, so that after cooling, the corresponding greenhouse film is obtained.

By separately heating the plastic laminating tape and the plastic film, each plastic laminating tape is directly combined with the plastic film. On the one hand, after the composite plastic laminating tape, the overall tensile strength of the plastic film can be effectively improved. Since the plastic laminating tape is relatively fixed to the plastic film, the portion of the plastic laminating tape can be directly pulled during use. To achieve the effect of straightening or flattening the plastic film, there is no damage to the plastic film due to excessive pulling force; at the same time, since the plastic laminating tape is directly laminated on the plastic film, only a single layer of plastic is needed. The film can be used, which greatly simplifies the production process and makes the operation process simpler, since only a single layer is used. Thin also reduces costs to a certain extent. On the other hand, since the present invention is directly integrated into one body, since the plastic film is relatively thin and the plastic film tape is relatively thick, if the same heat sealing temperature is used, if the temperature is too high, the plastic film is easily melted during the heat sealing process, and the temperature is high. Too low is likely to cause poor composite effect. Therefore, the inventors have found through research that by using different heating temperatures on both sides of the plastic laminating tape and the plastic film, the heating temperature on the plastic laminating tape side is relatively higher than the heating temperature on the plastic film side, and heating is performed separately. Therefore, the better thermal combination of the two is integrated into one, achieving the effect of high composite strength, achieving a simplified process while ensuring the strength of the product and the yield of the product.

In the above method for producing a greenhouse film, preferably, the heating temperature on each plastic laminating tape side is heated by a long heating block, and the elongated heating block is attached to each plastic laminating tape. The surface of the plastic film is heated by a cylindrical heating roller or a long heating block, and the cylindrical heating roller or the elongated heating block is attached to the plastic film. a heating surface of the elongated heating block is adjacent to a heating surface of the cylindrical heating roller or the elongated heating block, and each plastic laminating tape is thermally integrated with the plastic film. . Since the thickness of the plastic laminating tape is relatively thick, by using a long heating block to perform high-temperature heating, the plastic laminating tape can be preheated by heating in advance when entering the long heating block, so that The plastic laminating tape can better soften the state; on the other hand, by using a cylindrical heating roller, the plastic film can be heated relative to the line contact, and at the same time, combined with low-temperature heating, the two can be better. The thermal composite is integrated, and the thermal heating is performed by directly bringing the long heating block into contact with the cylindrical heating roller. By using a cylindrical heating roller, the heating roller can be more effectively rolled. The thermal lamination of the plastic laminating tape and the plastic film can be carried out in the next process, which can also ensure the bonding force of the two after heat sealing. Of course, since the heating temperature of the plastic film side is relatively low, the strip is used. The heating block is heated to achieve a better composite effect.

In the above method for producing a greenhouse film, preferably, the strip-shaped heating block is attached to the heating surface of each of the plastic lamination belts to have the same width as the corresponding plastic lamination belt. The heating block can be used to heat the plastic laminating tape more effectively, and the heated area of the plastic laminating tape is more uniformly heated, which is advantageous for better bonding with each contact point of the plastic film; meanwhile, due to plastic pressure The heating temperature of the strip-shaped heating pressure on the side of the film strip is relatively high, and by adjusting the size thereof, it is possible to better protect the surrounding plastic film from being damaged. Further preferably, the elongated heating block has a length of 15 cm to 20 cm. When the plastic film side is also heated by the elongated heating block, the length of the long heating block on the side of the plastic film tape side and the plastic film side may be 15 cm to 20 cm. It can make the heating block heat the plastic laminating tape better, so that it has sufficient preheating time, so that the effect of thermocompression is better.

In the above method for producing a greenhouse film, preferably, when each of the plastic lamination tapes and the plastic film passes between a long heating block and a cylindrical heating roller or a long heating block, Each of the plastic laminating tape and the plastic film are moved in the vertical direction under the action of traction. Since the plastic laminating tape and the plastic film itself have a certain weight, and the present invention is completed by separately heating the plastic laminating tape and the plastic film on both sides, if it is operated in the horizontal direction, The self-gravity action makes it easy for the plastic laminating tape and the plastic film to be pressed down on the heating block or the heating roller below. On the one hand, the underlying material is easily heated to cause melting or damage; on the other hand, the film is added. The friction between the whole and the heating member below may easily cause the film to break during the pulling process, and after the vertical direction is moved, the above problems can be well solved, and the two can be well integrated. Guarantee the quality of the product.

In the above method for producing a greenhouse film, preferably, each of the plastic laminating tapes and the plastic film simultaneously move at a pulling speed of 10 m/sec to 15 m/sec. The reason that the two in the heating process is more reasonable in the heating part can make the effect of the heat compounding, and at the same time, can also make the plastic film tape and the plastic film have a certain tension. Tightening exists, which can make the heat-sealing between the two smoother, without wrinkles and other phenomena, so that the bonding force of the pressing is better, and it is more favorable for the rapid progress of the pipeline.

In the above method for producing a greenhouse film, preferably, the plastic laminating tape is prepared by the following method:

A. moving a plurality of twisted polyester threads parallel and on the same plane forward by the traction force, and then heating the twisted polyester thread through the heating zone to be in a softened state;

B. Further, the twisted polyester thread is subjected to a molten thermoplastic resin, and the twisted polyester thread is combined with the molten thermoplastic resin, and the thermoplastic resin formed by curing the twisted polyester fiber in a molten state is cured. In the layer, a flat plastic film strip is formed, and the plastic laminating strip is cooled to obtain a corresponding finished plastic laminating strip. Since the twisted polyester thread has a certain spiral state, it is equivalent to making the surface of the polyester thread have a certain roughness, rather than a smooth state, so that the thermoplastic resin coated on the outer layer is in contact with the twisted polyester thread. The surface is formed in a state equivalent to the inlay, which increases the bonding force between the polyester thread and the thermoplastic resin, so that the sliding phenomenon is less likely to occur; at the same time, the heat is softened by first heating the twisted polyester thread for the purpose of The polyester resin is better combined with the molten thermoplastic resin, which is equivalent to a state in which the surface between the two is partially inlaid or staggered, and a synergistic effect can be formed by using a twisted polyester thread. Instead of a simple coating state, the bonding force between the twisted polyester thread and the thermoplastic resin can be improved, and the bonding force between the polyester thread and the thermoplastic resin coated on the outer layer can be improved as a whole, so that it can be used. It will not fall off during the process. In addition, by coating a plurality of parallel twisted polyester threads in the plastic laminating tape, the overall strength property of the laminating tape is improved, and the product is less likely to be broken, thereby improving the composite with the plastic film. The overall strength properties of the film; at the same time, due to the presence of the twisted polyester thread, after thermal compounding with the plastic film, the bonding force between the plastic film and the plastic laminating tape is also increased to some extent, and the bonding fastness performance is improved.

In the above method for producing a greenhouse film, preferably, the temperature of the heat treatment in the step A in the preparation of the plastic film tape is from 140 ° C to 170 ° C. The polyester wire can be softened at a high temperature to improve the bonding force with the thermoplastic resin, and at least the polyester wire is melted to ensure the strength property, thereby ensuring the overall strength performance of the film.

In the above method for producing a greenhouse film, it is preferable that the twisted polyester thread is in a tension state during the heat treatment in the step A. Since the twisted polyester thread is more or less loose during the production process, the filaments are fluffed or fluffed. By heating the state to make it tension, the polyester yarn can be subjected to a certain reforming process to make the filament Re-stretching, so as to effectively remove the defects of the wool or fluffing, so that the twisting line compounded in the thermoplastic resin and each wire in the twisting line are in a better tension state, effectively ensuring the coated polyester thread The bonding force effect with the thermoplastic resin improves the overall strength properties of the plastic film by increasing the strength of the plastic laminating tape.

In the above method for producing a greenhouse film, preferably, the molten resin in the molten state in the step B in the preparation of the pressure-coated film tape contains silica gel, and the percentage of the mass of the thermoplastic resin in the molten state is 30% by weight. 40wt%. On the one hand, it can improve the adhesion between the polyester thread and the thermoplastic resin, so as to have better bonding fastness performance; on the other hand, by adding silica gel, the formed laminating tape can be made to have better flexibility. It can better combine the plastic laminating tape with the plastic film, which is beneficial to ensure the bonding effect of the two. As a still further preferred, the silica gel accounts for 33% by weight to 35% by weight based on the mass of the thermoplastic resin in a molten state. Most preferably, the molten thermoplastic resin in step B is mainly made up of the following mass percentage components:

Polypropylene: 30% by weight to 40% by weight; Polyethylene: 30% by weight to 40% by weight; Silica gel: 30% by weight to 40% by weight. It can not only improve the bonding force with the polyester thread, but also ensure the good flexibility of the laminating tape. It has better compatibility with the plastic film, and is more beneficial to the plastic laminating tape and the plastic film. Between The combination of fastness.

In summary, the present invention has the following advantages over the prior art:

1. By separately heating the plastic laminating tape and the plastic film, the plastic laminating tape is directly combined with the plastic film, and the heating temperature of the plastic laminating tape side is much higher than the heating temperature of the plastic film side. The thermal fusion of the two materials with uneven thickness is integrated to improve the strength of the plastic film. At the same time, since the plastic laminating tape is directly laminated on the plastic film, it is only required to pass through the film when pulling or flattening the film. Pulling the plastic laminating tape can achieve the pulling or finishing of the whole film, and the strength of the plastic laminating tape is relatively higher than that of the plastic film, so that the corresponding strength is improved; However, the operation process and the cost reduction effect are greatly simplified.

2. By heating the plastic laminating tape with a long heating block, the plastic laminating tape can be preheated to a better softening state, which is a good solution for the laminating tape. The problem is that the thickness is thick and the heat is uneven or the softening effect cannot be achieved. At the same time, the plastic film is heated by the cylindrical heating roller which is heated at a low temperature, so that the high bonding force after heat sealing is well realized.

3. By making the length of the heating surface of the strip-shaped heating block attached to the plastic laminating strip side the same as the width of the plastic laminating strip, the laminating strip can be effectively heated to make the heating uniformity good, thereby The plastic laminating tape has a better softening state, and there is no defect that local heating is caused to cause softening, thereby achieving the bonding fastness with the plastic film, and there is no problem that the partial heat cannot be integrated into one body, as a whole. Improves the bonding fastness between the plastic laminate and the plastic film.

4. By coating a plurality of parallel twisted polyester threads in the plastic laminating tape, the overall strength performance of the laminating tape can be improved, and the phenomenon of cracking and the like is less likely to occur, thereby improving the overall film composited with the plastic film. Strength performance; At the same time, due to the presence of the twisted polyester thread, after thermal compounding with the plastic film, the bonding force between the plastic film and the plastic laminating tape is also increased to some extent, and the bonding fastness performance is improved.

BRIEF DESCRIPTION OF THE DRAWINGS:

Figure 1 is a schematic perspective view of the greenhouse film.

2 is a schematic enlarged perspective view of a plastic laminating tape in the greenhouse film.

Fig. 3 is a schematic enlarged perspective view showing the surface of the plastic laminating tape in the greenhouse film partially turned up.

Fig. 4 is a schematic enlarged view showing the twisted polyester thread in the plastic lamination belt.

In the figure, 1, plastic laminating tape; 11 thermoplastic resin layer; 12, twisted polyester thread, 2, plastic film.

detailed description

The technical solutions of the present invention are further specifically described below by way of specific embodiments, but the present invention is not limited to the embodiments.

The size of the greenhouse film mentioned in the following embodiments can be adjusted according to actual needs, and there is no specific limitation. In addition, the number of the heat-sealing plastic laminating strips 1 on the greenhouse film can also be adjusted according to actual needs. Generally, the interval between the plastic film strips 1 adjacent to each other on the plastic film 2 is about 6 meters, which can improve the overall strength of the film of the greenhouse, and the plastic film strip 1 on the plastic film 2 can be adjusted according to actual needs. Each of the pieces is thermally composited in turn; of course, it is also possible to use a plurality of plastic laminating strips 1 to perform thermal recombination simultaneously.

Specifically, as shown in FIG. 1 , the greenhouse film comprises a plurality of plastic laminating tapes 1 and a plastic film 2, wherein a plurality of plastic lamination tapes 1 are thermally laminated on the same side of the plastic film 1 , of course, The plastic laminating tape 1 is disposed on both sides of the plastic film 2. Generally, the interval between the two adjacent plastic lamination tapes 1 is 1 m, and the interval can be appropriately adjusted according to the strength requirement. If the interval is 1.5 meters, 2 meters, etc., in the actual production processing, three plastic laminating strips 1 can be synchronously thermally composited on the plastic film 2, and of course, according to the width of the plastic film 2 4, 5, 8, 10, or even more plastic laminating strips 1 are simultaneously thermally laminated on the plastic film 2, wherein the plastic lamination film The end of the belt 1 may be flush with the edge of the plastic film 2 in the width direction, or the end of the plastic lamination belt 1 may be slightly longer than the edge of the width direction of the plastic film 2, which is advantageous for pulling.

As shown in Figs. 2 to 4, the plastic laminating tape 1 includes a twisted polyester thread 12 and a thermoplastic resin layer 11, and the twisted polyester thread 12 is coated in the thermoplastic resin layer 11 by thermal compounding, wherein The polyester threads are arranged in parallel along the length of the plastic laminating strip 1. The plastic laminating tape 1 is flat, and the length can be selected and adjusted according to the needs of the actual plastic film. It is preferable to provide 6-8 twisted polyester threads 12 in the plastic laminating tape for the thermoplastic resin layer. The transparency of 1 can be adjusted according to the materials selected. Of course, the twisted polyester thread 12 can also be replaced by other twisted polyester fiber strands, such as twisted nylon thread.

For better explanation, the following embodiment specifically describes the thermal recombination between the plastic laminating tape 1 and the plastic film 2, and at the same time, the plastic film 2 made of a PE material is not limited to the material. The plastic film 2 can be made of other plastic film 2 made of a PP material or the like.

Example 1

According to the number of the plastic laminating tapes 1 disposed on the PE plastic film 2, the corresponding plastic laminating tape 1 of the corresponding number of rolls is placed at the unwinding start for unwinding; likewise, the wound PE plastic film 2 is wound. Corresponding placement is performed at the beginning of the unwinding; the plastic laminating tape 1 and the PE plastic film 2 are sequentially moved to the next process by a traction mechanism disposed on the subsequent process, wherein the traction mechanism is preferably placed in the heat The compounding process (the thermal lamination process of the plastic laminating tape 1 and the PE plastic film 2) and the cooling treatment process; no matter how many plastic laminating tapes are thermally composited on the PE plastic film 2, each of the production lines can be sequentially The root is subjected to a complete process and then subjected to the next process; a plurality of plastic film tapes 1 can also be simultaneously subjected to simultaneous thermal composite treatment. In this embodiment, the thermal composite is performed synchronously, and the plastic film 2 is heated at intervals of 1 meter. A plastic laminating tape 1 is composited, and 7 plastic laminating tapes 1 are thermally composited, and the width of the plastic film 2 is 6 meters, and the length can be adjusted as needed to make the plastic pressure The film tape 1 is thermally composited with a plastic film tape 1 at intervals of 1 meter in the width direction of the plastic film 2.

When the production line is just running, each plastic laminating tape 1 and PE plastic film 2 can be manually guided to the traction mechanism, and then the traction force of each plastic laminating tape 1 and PE plastic film 2 in the traction mechanism can be made. Under the action of the two, the synchronous movement is sequentially performed to each process, and a plurality of guiding mechanisms can be set for guiding in the middle, and each plastic laminating tape 1 and the PE plastic film 2 that are synchronously moved are subjected to thermal composite processing through thermal compounding, and thermal compounding is performed. During the treatment, the heating temperature of each plastic laminating strip 1 side is 240 ° C; the heating temperature of the PE plastic film 2 side is 190 ° C, and the thermocompression is directly performed while heating, so that each plastic laminating strip 1 is After being thermally integrated with the PE plastic film 2, after pulling and moving through the traction mechanism in the next process, each plastic laminating tape 1 and the PE plastic film 2 are simultaneously thermally integrated into one body, and after air cooling through the next process. The winding is performed to obtain a corresponding greenhouse film, wherein the traction after the traction mechanism can be pulled by the power of the winding mechanism.

Example 2

According to the number of the plastic laminating tapes 1 disposed on the PE plastic film 2, the corresponding plastic laminating tape 1 of the corresponding number of rolls is placed at the unwinding start for unwinding; likewise, the wound PE plastic film 2 is wound. Corresponding placement is performed at the beginning of unwinding; unwinding is carried out by each of the plastic laminating tape 1 and the PE plastic film 2, which are arranged in the subsequent process, wherein the traction mechanism is preferably set. In the thermal compounding process (each plastic laminating tape 1 and the PE plastic film 2 thermal lamination process) and the cooling treatment process; in this embodiment, each plastic laminating tape 1 and the PE plastic film 2 are simultaneously thermally composited. And the width of the plastic film 2 is 6 meters, the length can be adjusted as needed, so that the plastic laminating tape 1 is thermally composited at intervals of the width of the plastic film 2 with five plastic laminating strips 1, wherein the width of the plastic film 2 The two edges of the direction are each thermally combined with a plastic laminating strip 2.

When the production line is just running, each plastic laminating tape 1 and PE plastic film 2 can be manually guided to the traction mechanism, and then continuous production can be achieved. Then, each plastic laminating tape 1 and PE plastic film 2 are sequentially moved synchronously to each process under the traction force of the traction mechanism, so that the synchronous moving speed is 10 m/s (equivalent to the traction speed). In the middle, a plurality of conventional guiding mechanisms can be set for guiding, and each plastic laminating strip 1 and the PE plastic film 2 that are synchronously moved are first subjected to thermal lamination processing through a thermal lamination process, and each plastic laminating tape is subjected to thermal composite processing. The heating temperature on the 1 side is 220 ° C. The heating process is performed by heating the strip-shaped heating block, and the long heating block is attached to the outer surface of each plastic laminating strip 1; at the same time, the PE plastic film 2 is made. The heating temperature of the side is 160 ° C, and heating is performed by a cylindrical heating roller during heating, the heating roller can be rolled, and the cylindrical heating roller is attached to the outer surface of the PE plastic film 2, preferably the position of the heating roller. a portion in the middle of the elongated heating block; wherein the heating surface of the elongated heating block is adjacent to the heating surface of the cylindrical heating roller, and each plastic lamination tape 1 can be combined with the PE plastic film 2 The thermal compression is performed while being heated, wherein each of the plastic laminating tape 1 and the PE plastic film 2 are moved between the elongated heating block and the cylindrical heating roller under the traction force, so that each strip The plastic laminating tape 1 and the PE plastic film 2 are both moved in the vertical direction, and the two can enter the thermal recombination process from above by the action of the traction force, and then the thermal composite process is performed from below; Under the action of traction force, the thermal composite process is entered from below, and then the thermal composite process is performed from above, so that each plastic laminating tape 1 is thermally composited with the PE plastic film 2, and then moved to the traction mechanism through the next process. So that each plastic laminating tape 1 and the PE plastic film 2 are thermally composited into one body, and then air-cooled through the next process, and then wound up to obtain a corresponding greenhouse film, wherein the traction after the traction mechanism can be retracted. The power of the mechanism is towing.

Example 3

According to the number of the plastic laminating tapes 1 disposed on the PE plastic film 2, the corresponding plastic laminating tape 1 of the corresponding number of rolls is placed at the unwinding start for unwinding; likewise, the wound PE plastic film 2 is wound. Corresponding placement is performed at the beginning of the unwinding; unwinding of each plastic laminating tape 1 and PE plastic is carried out by a traction mechanism disposed on the subsequent process The film 2 is sequentially moved to each process. Among them, it is preferable to arrange the traction mechanism between the thermal lamination process (the thermal lamination process of each plastic lamination tape 1 and the PE plastic film 2) and the cooling treatment process; Each plastic laminating strip 1 and PE plastic film 2 are simultaneously thermally composited, and the width of the plastic film 2 is 6 meters, and the length can be adjusted as needed, so that the plastic laminating strips 1 are equally spaced along the width direction of the plastic film 2. The thermal composite has eight plastic laminating strips 1, wherein the plastic film strip 2 is thermally composited at both edges in the width direction. Simultaneously carried out by hot-bonding 8 plastic laminating press belts;

When the production line is just running, each plastic laminating tape 1 and PE plastic film 2 can be manually guided to the traction mechanism, and then the continuous production process can be achieved, and then each plastic lamination tape can be 1 and PE plastic film 2 under the action of the traction mechanism of the traction mechanism to move synchronously to each process, so that the synchronous moving speed is 10m / s (equivalent to the traction speed), a plurality of conventional guiding mechanisms can be set in the middle to guide, first Each of the plastic laminating tape 1 and the PE plastic film 2 that are synchronously moved are subjected to a thermal lamination process through a thermal lamination process, and the heating temperature of each plastic laminating tape 1 side is 230° C., and the heating process is long. The strip-shaped heating block is heated, and a long heating block is attached to the outer surface of each of the plastic laminating strips 1, and a long heating block is attached to the heating of each of the plastic laminating strips 1. The width of the surface is the same as the width of each plastic laminating strip 1 and the length of the elongated heating block is 15 cm; at the same time, the heating temperature of the side of the PE plastic film 2 is 180 ° C, and the heating is performed in a cylindrical manner during heating. Roll Heating, the heating roller can roll, and the cylindrical heating roller is attached to the outer surface of the PE plastic film 2, and the position of the heating roller is located in the middle portion of the elongated heating block; wherein, the strip-shaped portion The heating surface of the heating block is close to the heating surface of the cylindrical heating roller, and each plastic laminating tape 1 and the PE plastic film 2 can be directly thermo-compressed while being heated, wherein each plastic laminating tape 1 When the PE plastic film 2 is moved between the elongated heating block and the cylindrical heating roller under the action of the traction force, each of the plastic laminating tape 1 and the PE plastic film 2 are moved in the vertical direction, By making the two in traction Under the action, it enters the thermal compounding process from above, and then heats the composite process from below. Of course, it is also possible to make the two into the thermal compounding process from the bottom under the action of traction force, and then carry out the thermal compounding process from above to make each plastic lamination film After the belt 1 is thermally composited with the PE plastic film 2, and then pulled through the traction mechanism in the next process, each plastic laminating strip 1 and the PE plastic film 2 are thermally composited, and air-cooled through the next process. After that, the winding is performed to obtain a corresponding greenhouse film, wherein the traction after the traction mechanism can be pulled by the power of the winding mechanism.

Example 4

According to the number of the plastic laminating tapes 1 disposed on the PE plastic film, the corresponding plastic laminating tape 1 of the corresponding number of rolls is placed at the unwinding start for unwinding; likewise, the wound PE plastic film 2 is correspondingly The placing is performed at the beginning of the unwinding to unwind; the plastic laminating tape 1 and the PE plastic film 2 are sequentially moved to each process by a pulling mechanism disposed on the subsequent process, wherein the traction mechanism is preferably disposed at The thermal compounding process (the thermal lamination process of each plastic laminating tape 1 and the PE plastic film 2) and the cooling treatment process; in this embodiment, each plastic laminating tape 1 and the PE plastic film 2 are simultaneously thermally composited. And the width of the plastic film 2 is 6 meters, and the length can be adjusted as needed, so that the plastic laminating tape 1 is thermally composited along the width direction of the plastic film 2 with three plastic laminating tapes 1, wherein the width of the plastic film 2 is made. The two sides of the direction are thermally composited with a plastic laminating strip 2, which is synchronously carried out by thermally laminating three plastic laminating press belts.

When the production line is just running, each plastic laminating tape 1 and PE plastic film 2 can be manually guided to the traction mechanism, and then the continuous production process can be achieved, and then each plastic lamination tape is Under the action of the traction force of the traction mechanism, the PE plastic film 2 is sequentially moved synchronously to each process, so that the synchronous moving speed is 15 m/s (corresponding to the traction speed), and a plurality of conventional guiding mechanisms can be set for guiding in the middle. Each of the plastic laminating tape 1 and the PE plastic film 2 which are synchronously moved are subjected to a thermal lamination process through a thermal lamination process, and the heating temperature of each plastic laminating tape 1 side is 220° C., and the heating process adopts a long strip shape. Heating block Heating, and attaching a long heating block to the outer surface of each plastic laminating strip 1, and attaching the elongated heating block to the width of the heating surface of each plastic laminating strip 1 and the plastic pressing The width of the film strip is the same and the length of the long heating block is 20 cm; at the same time, the heating temperature of the PE plastic film 2 side is 170 ° C, and the PE plastic film 2 side is also heated by a long heating block during heating. Heating and laminating the heating block on the outer surface of the PE plastic film 2, and at the same time, the width of the heating surface of the elongated heating block attached to the side of the plastic film 1 is the same as the width of the plastic laminating tape 2 And the length of the elongated heating block is 20 cm, and the position of the elongated heating block is located in the middle of the longitudinal direction of the relatively long heating block; wherein the two elongated heating blocks are The heating surfaces are oppositely arranged and close to each other, so that each plastic laminating strip 1 and the PE plastic film 2 can be directly thermo-compressed while being heated, wherein each plastic laminating strip 1 and the PE plastic film 2 are in traction. Move down through long strips of heating block and cylindrical When the heating roller is between, each plastic laminating tape 1 and the PE plastic film 2 are moved in the vertical direction, and the two can enter the thermal recombination process from above by the traction force, and then move out of the thermal composite from below. In the process, of course, the two may enter the thermal recombination process from the bottom under the action of the traction force, and then remove the thermal recombination process from above, so that each plastic lamination tape 1 and the PE plastic film 2 are thermally composited together, and then After the next process is pulled and moved through the traction mechanism, each plastic laminating tape 1 is thermally composited with the PE plastic film 2, and then air-cooled after the next process, and the corresponding greenhouse film is obtained. The traction after the traction mechanism can be pulled by the power of the winding mechanism.

Example 5

The polyester monofilament used in this embodiment can be processed by a conventional method: if the high-viscosity molten polyester raw material is selected first, and then after being metered, the conventional method of spinning, cooling, oiling, stretching and heat setting is adopted. After the process, it is further processed by winding to obtain the corresponding high-strength industrial polyester yarn product. For example, the processing method of the corresponding polyester yarn in the Chinese patent (authorization publication number: CN102797055B) can be processed by other conventional methods, and will not be described herein.

The width of the plastic lamination tape 1 in this embodiment can be adjusted according to actual needs. However, for better explanation, the width of the plastic lamination tape 1 in the following embodiments is 1.2 cm, but is not limited to the width range.

The polyester yarn is twisted, that is, a plurality of polyester monofilaments are firstly twisted to form a single twisted polyester thread having a specification of 1100 dtex/192f; and then, six single twisted polyester threads are again subjected to twisting treatment. Forming a composite twisted polyester thread, winding and forming, and standby; and the composite twisted polyester thread has a specification of 6000D;

According to the number of twisted polyester threads 12 disposed in the plastic laminating tape 1, the correspondingly wound twisted polyester thread 12 of the corresponding number of rolls is placed at the beginning of unwinding for unwinding, and at the same time by setting in the successor The traction mechanism in the process drives the twisted polyester thread 12 to move forward, wherein the traction mechanism is disposed between the coating process (the twisting process of the twisted polyester thread 12 and the thermoplastic compound) and the cooling process, and the plastic film is selected in the embodiment. The belt 1 is covered with 8 twisted polyester threads 12 arranged in parallel;

Specifically, the eight twisted polyester threads 12 which are parallel and on the same plane are moved forward by the traction force of the above-mentioned traction mechanism, and a plurality of guiding mechanisms can be provided in the middle of the movement as needed, and then The twisted polyester yarn 12 which is synchronously moved is moved to the heating zone to heat the twisted polyester thread 12, so that the heating temperature when the twisted polyester thread 12 enters the heating zone is 140 ° C, and the twisted polyester thread 12 is removed from the heating zone. The heating temperature is 170 ° C, and the twisted polyester thread 12 is in a tension state when it passes through the heating zone, so that it is in a softened state;

On the other hand, the thermoplastic resin raw material can be first placed in the hopper of the twin-screw extruder, and then extruded and melted, and the temperature of the conveying section of the twin-screw extruder is set to 160 ° C to 170 ° C in turn; The temperature is 185 ° C ~ 195 ° C; the temperature of the mixing section is 200 ° C ~ 220 ° C and the temperature of the homogenization section is 225 ° C ~ 235 ° C, at the same time, the head temperature of the twin-screw extruder is set to 245 ° C ~ 255 °C, a molten thermoplastic resin is obtained, so that the molten thermoplastic resin is placed in the die of the twin-screw extruder; the processing of the thermoplastic resin in the molten state is in the overall processing line Can be continuously and continuously;

Then, the heated polyester resin 12 in the softened state after the heat treatment is passed through the molten thermoplastic resin at the die in the twin-screw extruder to adjust the viscosity of the molten thermoplastic resin to 0.75 dL/g to 0.95 dL. /g, the twisted polyester thread 12 is compounded with the thermoplastic resin, and then moved away from the corresponding outlet at the die as the twisted polyester thread moves forward, wherein the shape of the outlet can be in the shape of the laminating strip Correspondingly, the twisted polyester thread 12 is coated in the thermoplastic resin layer 11 formed by curing the molten thermoplastic resin, and a flat plastic lamination tape 1 is formed, and the thickness of the plastic lamination tape 1 is substantially larger than The diameter of the polyester fiber 12 can be twisted. Then, after the plastic film tape 1 semi-finished product passes through the traction mechanism, the plastic film tape 1 semi-finished product is first moved through the hot water at a temperature of 40 ° C to 60 ° C for pre-cooling treatment, and then It is cooled by water at normal temperature, and then heat-set by hot air at a temperature of 40 ° C to 60 ° C to remove moisture from the surface, and the movement after the traction mechanism can pass through the winder. Rolling forces on the drive belt that the film is moved forward semifinished product to give the corresponding finished plastic film tape 1. The breaking strength of the obtained plastic laminated tape 1 was 34.5 MPa.

Example 6

The specific preparation method of the plastic laminating tape 1 of the present embodiment is the same as that of the embodiment 5, and is not described herein again. The only difference is that the thermoplastic resin raw material is made of the following mass percentage components: polypropylene: 30 wt%; polyethylene 40% by weight; silica gel: 30% by weight. After the test, the breaking strength of the plastic laminated tape obtained in the present example was 34.4 MPa.

Example 7

The specific preparation method of the plastic laminating tape 1 of the present embodiment is the same as that of the embodiment 1, and will not be described herein again. The only difference is that the thermoplastic resin raw material is made of the following mass percentage components: polypropylene: 35 wt%; polyethylene : 30 wt%; silica gel: 35 wt%. After the test, the breaking strength of the plastic laminated tape obtained in the present example was 34.00 MPa.

Example 8

The specific preparation method of the plastic laminating tape 1 of the present embodiment is the same as that of the embodiment 1, and will not be described herein again. The only difference is that the thermoplastic resin raw material is made of the following mass percentage components: polypropylene: 30 wt%; polyethylene : 30 wt%; silica gel: 40 wt%. After the test, the breaking strength of the plastic laminated tape obtained in the present example was 34.6 MPa.

Example 9

The polyester yarn is twisted, that is, a plurality of polyester monofilaments are firstly twisted to form a single twisted polyester thread having a specification of 1100 dtex/192f; the twist of the single twisted polyester thread can be 45 degrees per meter; Then, six single twisted polyester threads are again subjected to twisting treatment to form a composite twisted polyester thread 12, which is formed by winding, and the composite twisted polyester thread 12 has a specification of 6000D, so that the twist of the polyester thread is increased. 45 degrees per meter; spare;

According to the number of twisted polyester threads 12 disposed in the plastic laminating tape 1, the correspondingly wound twisted polyester thread 12 of the corresponding number of rolls is placed at the beginning of unwinding for unwinding, and at the same time by setting in the successor The traction mechanism in the process drives the twisted polyester thread 12 to move forward, wherein the traction mechanism is disposed between the coating process (the twisting process of the twisted polyester thread 12 and the thermoplastic compound) and the cooling process, and the plastic film is selected in the embodiment. The belt 1 is covered with 8 twisted polyester threads 12 arranged in parallel along the length of the lamination belt;

Specifically, the eight twisted polyester threads 12 which are parallel and in the same plane are moved forward by the traction force of the above-mentioned traction mechanism, so that the moving speed of the twisted polyester thread 12 is 15 m/s (that is, equivalent to traction Speed), in the process of moving, a plurality of guiding mechanisms can be provided in the middle according to the need, which is beneficial to keep the twisted polyester thread 12 in a relatively tight state, and then move the twisted polyester thread 12 which is synchronously moved to the heating section. The twisted polyester thread 12 is heat treated so that the heating temperature when the twisted polyester thread 12 enters the heating zone is 140 ° C, and the heating temperature when the twisted polyester thread 12 is removed from the heating zone is 170 ° C, the inlet in the heating zone It can also be set between the exit and the exit. The heating temperature is 150 ° C, so that the twisted polyester thread 12 is gradually heated during the heating interval, which is beneficial to more uniform heating, and can effectively remove the phenomenon of hair or burrs, and at the same time, the twisted polyester thread 12 is heated. When the tension is in a state of tension, a tensioning mechanism can be provided to cause the twisted polyester thread 12 to be tensioned by the tensioning mechanism to be in a softened state;

On the other hand, the thermoplastic resin raw material can be first placed in the hopper of the twin-screw extruder, and then extruded and melted, and the temperature of the conveying section of the twin-screw extruder is set to 160 ° C in turn; the temperature of the melting section is 195. °C; the temperature of the mixing section is 220 ° C and the temperature of the homogenization section is 235 ° C. At the same time, the head temperature of the twin-screw extruder is set to 245 ° C to obtain a thermoplastic resin in a molten state, and the thermoplastic resin in a molten state is obtained. At the die of the twin-screw extruder; the processing of the thermoplastic resin in the molten state can be carried out synchronously and continuously in the entire processing line; the above-mentioned thermoplastic resin raw material is made of the following mass percentage components: polypropylene: 30 wt %; polyethylene: 35 wt%; silica gel: 35 wt%.

Then, the twisted polyester yarn 12 in the softened state after the heat treatment is passed through a thermoplastic resin in a molten state in the die of the twin-screw extruder, so that the twisted polyester thread 12 is compounded with the thermoplastic resin, and then added. The polyester filament 12 moves forward and is removed from the corresponding outlet at the die, wherein the shape of the outlet can correspond to the shape of the plastic laminating tape, and the twisted polyester thread 12 is coated with the thermoplastic resin in a molten state. After curing, the thermoplastic resin layer 11 is formed, and a flat plastic laminating tape 1 semi-finished product is formed. The thickness of the plastic laminating tape 1 is substantially larger than the diameter of the twisted polyester fiber 12, and then the plastic lamination tape is After the semi-finished product passes through the traction mechanism, the plastic film lamination 1 semi-finished product is firstly moved through the hot water with a temperature of 40 ° C to 60 ° C for pre-cooling treatment, and then subjected to cooling treatment by water at a normal temperature state, and then the temperature is 40. The hot air is heated at °C~60°C to remove the moisture from the surface, and the corresponding finished plastic laminating tape 1 is obtained. After the traction mechanism, the movement can pass through the winding power belt on the winding mechanism. Move the plastic laminating tape 1 semi-finished product forward. After the test, the breaking strength of the finished film laminating tape is 34.3 MPa.

Example 10

The specific manufacturing method of the greenhouse film in this embodiment is as follows:

First, the corresponding plastic laminating tape was processed according to the method of Example 9, and the plastic laminating tape 1 and the PE plastic film 2 were thermally composited in the same manner as in the third embodiment, and finally the corresponding greenhouse film was obtained.

The specific embodiments described in the present invention are merely illustrative of the spirit of the invention. A person skilled in the art can make various modifications or additions to the specific embodiments described or in a similar manner, without departing from the spirit of the invention or as defined by the appended claims. The scope.

While the invention has been described in detail and shown in the embodiments of the embodiments

Claims

A method for manufacturing a greenhouse film, characterized in that the method comprises the following steps:

The plurality of plastic laminating tapes (1) and the plastic film (2) are sequentially moved synchronously toward each process under the action of the traction force, and the plurality of plastic laminating tapes (1) are arranged in parallel, and the plastic pressing is performed. The film strip (1) is flat, so that each plastic laminating strip (1) is thermally composited with the plastic film (2) through a thermal lamination process, and the heating temperature of the side of each plastic laminating strip (1) is made. It is 220 ° C ~ 240 ° C; the heating temperature of each plastic film (2) side is 160 ° C ~ 190 ° C, so that each plastic laminating tape (1) is thermally combined with the plastic film (2), and then Pulling the movement in the next process, after cooling, the corresponding greenhouse film is obtained.
The method for producing a greenhouse film according to claim 1, wherein the heating temperature on the side of each of the plastic film strips (1) is heated by a long heating block, and the strip-shaped heating block is attached On the surface of each plastic lamination tape (1); the heating temperature on the side of the plastic film (2) is heated by a cylindrical heating roller or a long heating block, and the cylindrical heating roller or long a strip-shaped heating block is attached to the surface of the plastic film (2); the heating surface of the elongated heating block is close to the heating surface of the cylindrical heating roller or the elongated heating block, and It is possible to thermally combine each of the plastic laminating strips (1) with the plastic film (2).
The method for manufacturing a greenhouse film according to claim 2, wherein the strip-shaped heating block is attached to the width of the heating surface of each plastic laminating tape (1) and the corresponding plastic laminating tape (1) The width is the same.
The method for producing a greenhouse film according to claim 2 or 3, characterized in that the length of the elongated heating block is 15 cm to 20 cm.
The method for manufacturing a greenhouse film according to claim 2 or 3, wherein each of the plastic laminating tapes (1) and the plastic film (2) passes through a long heating block and a cylindrical heating roller or When the strips are between the heating blocks, each of the plastic laminating tapes (1) and the plastic film (2) are moved in the vertical direction under the action of the traction force.
The method for manufacturing a greenhouse film according to claim 1, wherein the pulling speed of each of the plastic laminating tapes (1) and the plastic film (2) is 10 m/sec to 15 m/sec.
The method for fabricating a greenhouse film according to claim 1, wherein the plastic laminating tape (1) is prepared by the following method:

A. moving a plurality of twisted polyester threads (12) parallel and on the same plane forward by the traction force, and then heating the twisted polyester thread (12) through the heating zone to be in a softened state;

B. The twisted polyester thread (12) is subjected to a molten thermoplastic resin, and the twisted polyester thread (12) is integrated with the molten thermoplastic resin, and the twisted polyester thread (12) is coated in a molten state. In the thermoplastic resin layer (11) formed by curing the thermoplastic resin, a flat semi-finished film is formed, and the laminating tape is subjected to a cooling treatment to obtain a corresponding finished plastic laminating tape 1.
The method for producing a greenhouse film according to claim 7, wherein the temperature of the heat treatment in the step A is from 140 ° C to 170 ° C.
The method for producing a greenhouse film according to claim 8, wherein the twisted polyester thread (12) is in a tensioned state during the heat treatment in the step A.
The method for producing a greenhouse film according to any one of claims 7 to 9, wherein in the step B, the molten thermoplastic resin contains silica gel, and the percentage of the mass of the thermoplastic resin in the molten state is 30% by weight. 40wt%.
The method for producing a greenhouse film according to claim 9, wherein the molten thermoplastic resin in the step B is mainly made of the following mass percentage components:

Polypropylene: 30 wt to 40 wt%; polyethylene: 30 wt to 40 wt; silica gel: 30 wt to 40 wt.