阅读说明：本技术 一种lcp膜制备生产用的吹膜方法 (Film blowing method for LCP film preparation and production ) 是由 刘勇 王帅 张威 李永刚 于 2021-09-06 设计创作，主要内容包括：本发明公开了一种LCP膜制备生产用的吹膜方法,包括以下步骤：S101、熔融塑化、S102、挤出成型、S103、吹胀加工、S104、定型处理、S105、覆膜处理、S106、拉伸加工、S107、冷却处理、S108、牵引加工、S109、收卷处理；本发明通过柔性密封囊内壁对管坯的贴合实施形位限定的作用,能有效的避免成型膨胀的管坯在形成LCP膜前出现褶皱的情况,且通过在塑料薄膜表面通过拉伸器具对管坯实施拉伸定型,从而能够有效的提升管坯LCP膜的张力,使得LCP膜各部分更加均匀,通过拉伸应力的脱离效果使得塑料膜自动脱落以便提取管坯LCP膜时,避免出现贴附不均的情况,弥补现有技术中的不足。(The invention discloses a film blowing method for LCP film preparation and production, which comprises the following steps: s101, melt plasticizing, S102, extrusion molding, S103, inflation processing, S104, setting processing, S105, film coating processing, S106, stretching processing, S107, cooling processing, S108, drawing processing, S109 and winding processing; according to the invention, through the effect of limiting the shape and position of the inner wall of the flexible sealing bag for the attachment of the tube blank, the condition that the formed and expanded tube blank is wrinkled before the LCP film is formed can be effectively avoided, and the surface of the plastic film is subjected to stretching and shaping through a stretching device, so that the tension of the LCP film of the tube blank can be effectively improved, all parts of the LCP film are more uniform, the plastic film automatically falls off through the separation effect of the stretching stress so as to be convenient for extracting the LCP film of the tube blank, the condition of uneven attachment is avoided, and the defects in the prior art are overcome.)

1. A film blowing method for preparing and producing LCP films is characterized by comprising the following steps:

s101, melting and plasticizing: extracting raw materials prepared from the LCP film, and transferring the raw materials into an extruder through a conveyor for melt processing;

s102, extrusion molding: extruding the melted and plasticized raw materials at a discharge port of the extruder through an annular neck mold to form a tube blank structure;

s103, inflation processing: filling type compressed air is arranged in the extruder, and the compressed air is injected into the inner cavity of the raw material forming the tube blank structure, so that the raw material of the tube blank structure is expanded;

s104, shaping treatment: performing cage sealing on the periphery of the expanded pipe blank through a flexible sealing bag, and clamping the flexible sealing bag through a flattening device;

s105, film coating treatment: attaching the inner wall of the flexible sealing bag to the expanded tube blank through a plastic film;

s106, stretching: taking down the flexible sealing bag, and stretching and shaping the pipe blank on the surface of the plastic film through a stretching device;

s107, cooling treatment: cooling the shaped pipe blank in a standing mode;

s108, traction processing: the cooled formed tube blank is detached from the plastic film, and secondary stretching is carried out through a traction mechanism to obtain a complete film body;

s109, winding treatment: and winding and storing the obtained film body through a winding device.

2. A film blowing method for producing LCP films according to claim 1,

the melt plastifying preparation raw materials are hydroxybenzoic acid and 6-hydroxy-2-naphthoic acid monomer polymer.

3. A film blowing method for producing LCP films according to claim 1,

the extrusion molding ring-shaped port die and the tube blank structure are arranged in a collinear way, a material receiving chamber is arranged on the periphery of a discharge port of the extruder and used as an isolated protection mechanism of the tube blank structure.

4. A film blowing method for producing LCP films according to claim 1,

the injection rate of compressed air for blowing processing is the same as the extrusion rate of the tube blank of the extruder, and the expansion rate of the tube blank is less than the injection rate of the compressed air.

5. A film blowing method for producing LCP films according to claim 3,

the flexible sealing bag of design processing is located and connects material indoor portion, flexible sealing bag inner wall and the laminating of pipe blank, flattening device specifically is parallel grip block, and parallel grip block is used for adjusting the physique state of flexible sealing bag.

6. A film blowing method for producing LCP films according to claim 1,

the plastic film subjected to film covering treatment is attached to the inside of the flexible sealing bag, and the viscosity coefficient between the flexible sealing bag and the plastic film is not larger than that between the expansion pipe blank and the plastic film.

7. A film blowing method for producing LCP films according to claim 1,

in the stretching process, the flexible sealing bag and the plastic film are detached, the clamping end of the stretcher is fixed with the tube blank, the tube blank is stretched, the plastic film on the surface of the tube blank is suspended, and the tube blank is stretched until the plastic film is separated from the tube blank under the action of gravity.

8. A film blowing method for producing LCP films according to claim 1,

and the standing cooling time of the cooling treatment is not less than 8 hours, and the pipe blank subjected to the standing treatment is in a suspended state.

9. A film blowing method for producing LCP films according to claim 7,

the plastic film of drawing processing is implemented through the mechanism of leveling and is got rid of, and the mechanism of leveling displacement direction and pipe are parallel state, the tensile stress of tractor is less than the tensile stress of elongator.

10. A film blowing method for producing LCP films according to claim 1,

the film bodies subjected to rolling treatment are annularly arranged by using a rolling device.

Technical Field

The invention relates to the technical field of film blowing methods, in particular to a film blowing method for LCP film preparation and production.

Background

LCP is liquid crystal polymer/macromolecule, a kind of wholly aromatic liquid crystal polyester macromolecule material composed of rigid macromolecule chain structure, is a new type high performance special engineering plastic.

The LCP film has the characteristics of low dielectric constant, low dielectric loss, low water absorption and stable performance, is an ideal 5G high-frequency high-speed FCCL base material, and can be widely applied to the fields of 5G mobile phone antennas, camera soft boards, high-speed transmission lines of notebook computers, smart watch antennas and the like.

LCP from resin material to the final mobile phone antenna module application needs the following steps: LCP resin-film-flexible copper clad laminate FCCL-flexible circuit board FPC-antenna module. LCP resin obtains the LCP film after processing, and the LCP film obtains FCCL after FCCL manufacturer covers copper, and the soft board enterprise processes FCCL into FPC again, and the blown film method among the prior art still has following not enough when preparing the LCP film to LCP resin processing:

in the film blowing method in the prior art, when the LCP film is prepared, compressed air injected into a tube blank is difficult to perform shape limitation on the blown tube blank when the tube blank is further blown, so that the formed LCP film is easy to wrinkle and adhere unevenly.

Disclosure of Invention

The invention aims to provide a film blowing method for LCP film preparation production, which aims to solve the problem that the shape limitation of a blown tube blank is difficult to carry out.

In order to achieve the purpose, the invention adopts a technical scheme that: a film blowing method for preparing LCP film is provided, which comprises the following steps: s101, melting and plasticizing: extracting raw materials prepared from the LCP film, and transferring the raw materials into an extruder through a conveyor for melt processing; s102, extrusion molding: extruding the melted and plasticized raw materials at a discharge port of the extruder through an annular neck mold to form a tube blank structure; s103, inflation processing: filling type compressed air is arranged in the extruder, and the compressed air is injected into the inner cavity of the raw material forming the tube blank structure, so that the raw material of the tube blank structure is expanded; s104, shaping treatment: performing cage sealing on the periphery of the expanded pipe blank through a flexible sealing bag, and clamping the flexible sealing bag through a flattening device; s105, film coating treatment: attaching the inner wall of the flexible sealing bag to the expanded tube blank through a plastic film; s106, stretching: taking down the flexible sealing bag, and stretching and shaping the pipe blank on the surface of the plastic film through a stretching device; s107, cooling treatment: cooling the shaped pipe blank in a standing mode; s108, traction processing: the cooled formed tube blank is detached from the plastic film, and secondary stretching is carried out through a traction mechanism to obtain a complete film body; s109, winding treatment: and winding and storing the obtained film body through a winding device.

Wherein, the melt plasticizing preparation raw material is hydroxybenzoic acid and 6-hydroxy-2-naphthoic acid monomer polymer.

The extrusion molding ring-shaped mouth mold and the tube blank structure are arranged in a collinear mode, a material receiving chamber is arranged on the periphery of a discharge port of the extruder, and the material receiving chamber is used as an air-isolation protection mechanism of the tube blank structure.

The injection rate of compressed air for blowing processing is the same as the extrusion rate of the tube blank of the extruder, and the expansion rate of the tube blank is smaller than the injection rate of the compressed air.

The shaping device comprises a shaping chamber, a material receiving chamber, a material conveying chamber, a flattening device, a pressing device and a pressing device, wherein the shaping chamber is used for shaping the flexible sealing bag, the inner wall of the flexible sealing bag is attached to a pipe blank, the flattening device is specifically a parallel clamping plate, and the parallel clamping plate is used for adjusting the shape state of the flexible sealing bag.

The plastic film subjected to film covering treatment is attached to the inside of the flexible sealing bag, and the viscosity coefficient between the flexible sealing bag and the plastic film is not larger than the viscosity coefficient between the expansion pipe blank and the plastic film.

The method comprises the following steps of stretching, removing the flexible sealing bag and the plastic film, fixing the clamping end of the stretcher and the tube blank, stretching the tube blank, wherein the plastic film on the surface of the tube blank is suspended until the plastic film is separated from the tube blank under the action of gravity.

And the standing cooling time of the cooling treatment is not less than 8 hours, and the pipe blank subjected to the standing treatment is in a suspended state.

The plastic film of the traction processing is removed through the leveling mechanism, the displacement direction of the leveling mechanism is parallel to the tube blank, and the tensile stress of the tractor is smaller than that of the stretcher.

The film bodies subjected to rolling treatment are annularly arranged by using a rolling device.

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

above scheme implements the effect that the position was prescribed a limit to through the laminating of flexible sealing bag inner wall to the pipe, thereby can effectually avoid the expanded pipe of shaping the condition of fold to appear before forming the LCP membrane, and implement tensile design to the pipe blank through stretching appliance on the plastic film surface, thereby can effectually promote the tension of pipe LCP membrane, make LCP membrane each part more even, make unsettled form pipe LCP membrane can carry out parallel stretching through the centre gripping tensile effect with the help of the elongator simultaneously, and make the plastic film drop automatically so that when drawing the pipe LCP membrane through tensile stress's the effect that breaks away from, avoid appearing attached uneven condition, remedy not enough among the prior art.

Drawings

FIG. 1 is a flow chart of the method of the present invention;

FIG. 2 is a schematic view of the annular die structure of the present invention;

fig. 3 is a schematic structural view of a receiving chamber of the invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a film blowing method for preparing LCP film comprises the following steps:

s101, melting and plasticizing: the raw material for LCP film preparation was extracted and transferred by a conveyor into an extruder for melt processing.

In some embodiments, the melt-plasticized preparation raw material is specifically hydroxybenzoic acid and 6-hydroxy-2-naphthoic acid monomer polymer, and the hydroxybenzoic acid and the 6-hydroxy-2-naphthoic acid monomer polymer can bring better processability, so that an optimal matrix resin effect can be provided for preparing the LCP film, and the adaptive effect of each process of the LCP film can be effectively improved.

S102, extrusion molding: and extruding the melted and plasticized raw materials at a discharge port of the extruder through an annular die to form a pipe blank structure.

In some embodiments, the raw materials after the melting and plasticizing are extruded through an annular opening die at a discharge port of an extruder, so that the matrix resin is preliminarily limited in implementation form, subsequent compressed air injection processing is facilitated, a tube blank structure is formed, the effect of hollow inner cavities can be achieved through the tube blank structure, the annular opening die and the tube blank structure which are subjected to extrusion forming are arranged in a collinear mode, the size of the tube blank which is subjected to extrusion forming is synchronous with that of the annular opening die, extrusion errors are avoided, a receiving chamber is arranged on the periphery of a discharge port of the extruder, and the receiving chamber is used as an air isolation protection mechanism of the tube blank structure and provides a pollution-free forming environment for the tube blank which is subjected to extrusion forming.

S103, inflation processing: filling type compressed air is arranged in the extruder, and the compressed air is injected into the inner cavity of the raw material forming the tube blank structure, so that the raw material of the tube blank structure can be expanded.

In some embodiments, filled compressed air is arranged in the extruder, the compressed air is injected into the inner cavity of the raw material forming the tube blank structure, so that the raw material of the tube blank structure can be expanded, the formed tube blank can be more smoothly prevented from blocking when being separated from the annular neck mold, the expansibility of the tube blank structure is improved, the injection rate of the compressed air for inflation processing is the same as the extrusion rate of the tube blank of the extruder, the expansion rate of the tube blank is smaller than the injection rate of the compressed air, the compressed air injected at the same rate is utilized, the expansion and the forming of the tube blank are synchronously changed, and the condition that the broken opening is generated due to the stress difference at the separation position of the tube blank and the annular neck mold is avoided.

S104, shaping treatment: and performing cage sealing on the periphery of the expanded pipe blank through a flexible sealing bag, and clamping the flexible sealing bag through a flattening device.

In some embodiments, the enclosuring seal is carried out on the periphery of the tube blank under expansion through a flexible sealing bag, so as to provide a range-limited effect for the forming of the tube blank, further, the tube blank is subjected to shape limitation during the blowing and expanding process so as to avoid the condition of uneven attachment in the expanding process, the flexible sealing bag is clamped by a flattening device, so that the joint degree of the tube blank is further improved, the shaped flexible sealing bag is positioned in the material receiving chamber, the inner wall of the flexible sealing bag is jointed with the tube blank, the flattening device is a parallel clamping plate which is used for adjusting the shape state of the flexible sealing bag, the shape and position limitation is realized through the attaching effect of the inner wall of the flexible sealing bag on the tube blank, and the effect of indirect reset adjustment on the tube blank is realized by adjusting the flexible sealing bag through the parallel clamping plates, so that the condition that the formed and expanded tube blank is folded is effectively avoided.

S105, film coating treatment: the inner wall of the flexible sealing bag is attached to the expanded tube blank through a plastic film.

In some embodiments, the inner wall of the flexible sealing bag is attached to the expanded pipe blank through a plastic film so as to facilitate the detachment of the pipe blank from the flexible sealing bag, the plastic film subjected to film covering treatment is attached to the inner part of the flexible sealing bag, the viscosity coefficient between the flexible sealing bag and the plastic film is not larger than that between the expanded pipe blank and the plastic film, and the pipe blank subjected to shape and position limitation is detached from the flexible sealing bag through the plastic film by virtue of the difference of the viscosity coefficients so as to facilitate the subsequent stretching processing treatment.

S106, stretching: taking off the flexible sealing bag, and stretching and shaping the tube blank on the surface of the plastic film by a stretching device

In some embodiments, the flexible sealing bag is taken down, the surface of the plastic film is stretched and shaped through a stretching device, so that the tension of the tube blank is improved, all parts of the tube blank are more uniform, the flexible sealing bag and the plastic film are removed in the stretching process, the clamping end of the stretching device is fixed with the tube blank, the tube blank is stretched, the plastic film on the surface of the tube blank is suspended, the tube blank is stretched until the plastic film is separated through the action of gravity, the suspended tube blank can be stretched in parallel through the clamping and stretching action of the stretching device, and the plastic film automatically falls off through the separation effect of the stretching stress, so that the rough surface condition is avoided when the tube blank is extracted.

S107, cooling treatment: and (5) cooling the shaped pipe blank in a standing mode.

In some embodiments, the shaped tube blank is subjected to cooling treatment in a standing mode so as to achieve shape shaping, the standing cooling time of the cooling treatment is not less than 8 hours, the tube blank subjected to standing treatment is in a suspended state, and the purpose that the formed plastic film of the tube blank can be independently formed can be achieved through long-time standing cooling.

S108, traction processing: and (4) detaching the cooled formed tube blank from the plastic film, and performing secondary stretching through a traction mechanism to obtain a complete film body.

In some embodiments, the cooled formed tube blank is detached from the plastic film, secondary stretching is performed through the traction mechanism, a complete film body is obtained, so that the tensile stress of the LCP film is improved, the plastic film subjected to traction processing is removed through the leveling mechanism, the displacement direction of the leveling mechanism is parallel to the tube blank, the tensile stress of the traction machine is smaller than that of the stretcher, and the final opening stress of the LCP film is adjusted through multiple times of stretching.

S109, winding treatment: the membrane body that will acquire is implemented the rolling through the coiling mechanism and is saved, and the membrane body that the rolling was handled utilizes the coiling mechanism to be cyclic annular and arranges to it is convenient for transport to reduce the storage capacity that the space occupied promotion LCP membrane.

To sum up, carry out the effect that the form and position was prescribed a limit to through the laminating of flexible sealing bag inner wall to the pipe, thereby can effectually avoid the expanded pipe of shaping the condition of fold to appear before forming the LCP membrane, and through implement tensile design to the pipe base at the plastic film surface through elongator, thereby can effectually promote the tension of pipe LCP membrane, make LCP membrane each part more even, simultaneously make unsettled form pipe LCP membrane can carry out parallel stretching through the centre gripping tensile effect with the help of the elongator, and make the plastic film drop automatically so that when drawing the pipe LCP membrane through tensile stress's the effect that breaks away from, avoid appearing the attached uneven condition, can effectually eliminate the defective defect when attached through this blown film method, reach the higher effect of further blown film adhesion strength.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.