WO2023123868A1 - 一种采用三泡成型法制备尼龙表层筒膜的工艺 - Google Patents

一种采用三泡成型法制备尼龙表层筒膜的工艺 Download PDF

Info

Publication number
WO2023123868A1
WO2023123868A1 PCT/CN2022/097269 CN2022097269W WO2023123868A1 WO 2023123868 A1 WO2023123868 A1 WO 2023123868A1 CN 2022097269 W CN2022097269 W CN 2022097269W WO 2023123868 A1 WO2023123868 A1 WO 2023123868A1
Authority
WO
WIPO (PCT)
Prior art keywords
film
bubble
steam
tube film
surface layer
Prior art date
Application number
PCT/CN2022/097269
Other languages
English (en)
French (fr)
Inventor
党宝庆
杨伟
吴大江
范文春
Original Assignee
升辉新材料股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 升辉新材料股份有限公司 filed Critical 升辉新材料股份有限公司
Publication of WO2023123868A1 publication Critical patent/WO2023123868A1/zh

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/49—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using two or more extruders to feed one die or nozzle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
    • F26B3/30—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun from infrared-emitting elements

Definitions

  • the invention relates to the technical field of nylon materials, in particular to a process for preparing a nylon surface tube membrane by a three-bubble molding method.
  • Nylon 6 (PA6) and nylon 66 (PA66) are crystalline thermoplastic materials; for crystalline polymers, they cool quickly during blow molding The nylon material cannot be naturally crystallized and shaped. After processing and molding, the nylon on the surface of the product is very easy to absorb moisture in the air. After the surface nylon absorbs water, it will have a great impact on the physical indicators such as the appearance, size, and shrinkage rate of the product. The width of the film roll shrinks seriously, the roll surface is uneven, and the length and width of the bag change greatly. After the surface is exposed to the air for a certain period of time, it will wrinkle, which will affect the appearance and quality of film rolls and bags, and also affect some other physical performance indicators. Aspects such as packaging, storage, transportation of product in addition can be very troublesome because of this problem.
  • the purpose of the present invention is to overcome the defects existing in the prior art, and provide a molding process of nylon heat-shrinkable film on the surface of the three-bubble method. Smaller and more stable, with high puncture strength and good heat sealing effect.
  • the technical solution of the present invention is a process for preparing a nylon surface tube film by a three-bubble molding method, which includes the following steps in turn: one bubble is extruded from the tube film through a multi-layer co-extrusion film head and inflated into the film bubble , two-bubble heating and blowing tube film, three-bubble tube film shaping, and tube film winding; the second-bubble heating and blow-up tube film process also includes humidifying and toughening the tube film surface, and the three-bubble shaping process includes Drying and heating the surface layer of the cylindrical membrane; the humidification and toughening treatment includes treating the surface layer of the cylindrical membrane with alcohols for toughening.
  • the humidifying and toughening treatment on the surface of the tube film includes humidifying the surface layer of the tube film by steam.
  • the steam humidification method has high calorific value, good humidification effect and fast uniform speed.
  • a further technical solution is that the alcohols used in the steam humidification treatment process for the surface layer of the tube membrane are one or more of methanol, ethanol, tert-butanol, and isopropanol, and the alcohols account for the volume ratio of the steam 1-5%.
  • Steam and alcohol are mixed and heated, humidification and toughening are carried out simultaneously, the calorific value is stable, the mass transfer is rapid, and the penetration is strong, which promotes the chemical interaction between the alcohol and the surface of the nylon material, and the nylon heat shrinkable film produces a significant toughening effect.
  • a further technical solution is that, in the step of humidifying and toughening the surface of the cylindrical film, a steam pipe is provided near the surface of the cylindrical film, and a casing is provided outside the steam pipe, and the steam pipe is a cylindrical spiral distribution structure, A steam discharge hole is opened at the position where the inner side wall of the steam pipe is opposite to the nylon surface membrane.
  • the material of the steam pipe and shell is 304 stainless steel, and the setting of the outlet hole of the steam pipe can realize uniform spraying on the membrane bubble. Relying on the steam pressure to blow the mist-like temperature steam and alcohol mixed gas to the surface of the film, so that the surface of the film absorbs moisture, and the uniformity of the steam is achieved by adjusting the pressure of the steam and controlling the temperature.
  • the cylindrical spiral steam pipe is in close contact with the nylon surface of the film roll, and the contact time is 1-3 seconds, fully absorbing moisture, and the size is uniform and stable. It solves the problem of large waste and poor effect of adding water to toughen the surface of the annular membrane, and is better than the current flat method of moisture absorption.
  • a further technical solution is that a porous or mesh structure baffle is provided at the opening position of the steam discharge hole.
  • the porous or mesh-shaped baffle can evenly disperse the steam gas on the surface of the heat-shrinkable film, which is evenly heated and has a good mass transfer effect.
  • a further technical solution is that a manual valve is provided at the inlet of the steam pipeline to control the steam flow rate to 8-15L/min. Manual valves can be used to control steam flow.
  • a further technical solution is that an annular water receiving pan is installed at the bottom of the steam pipe, and a waste gas recovery system is arranged above the steam pipe.
  • the arrangement of the ring-shaped water receiving tray is used to collect and discharge the liquefied alcohol and water substances to prevent environmental pollution, and the liquefied alcohol and water substances can also be reused.
  • the exhaust gas recovery system is used to recover organic vapors to prevent environmental pollution.
  • a further technical solution is that the temperature of the steam is 40-100° C., the pressure is 0.2-0.6 MPa, and the contact time between the steam and the surface of the nylon surface tube membrane is 1-3 seconds.
  • the difficulty of this process lies in the control of steam pressure and temperature. If the steam pressure is too high, the steam will be excessive, and the moisture on the surface of the membrane will be too saturated to absorb, and the excessive steam will become water overflowing, resulting in waste of energy resources. , At the same time, it affects the subsequent drying operation, resulting in increased energy consumption and decreased output. If there is too little steam and the film absorbs unevenly and unsaturated, the technical problem of uncontrollable post-shrinkage on the product surface cannot be solved.
  • the surface of the film roll and the bag will also have unevenness. After the film absorbs water, it enters the oven for shaping and winding, so that the film can be deformed under the condition of moisture and tension, so that the product can be processed after aging And use, so that it is more stable.
  • the drying and heating step adopts an infrared heating method, and the drying temperature is 150-300°C.
  • Infrared refers to electromagnetic waves with a wavelength in the range of approximately 0.77-1000 ⁇ m.
  • infrared heating which is also called far-infrared heating. Since most organic compounds have strong absorption characteristics to far infrared rays, heating with infrared rays will have higher thermal efficiency.
  • the film roll After absorbing moisture, the film roll enters infrared heating to dry the surface and remove free water, while the moisture absorbed by nylon is bound water, which will not be affected under the control of infrared drying temperature, ensuring the crystallization of nylon material.
  • a further technical scheme is that after the winding step, the tube film needs to be placed for 48-72 hours to carry out subsequent processing steps.
  • the product Before the three-bubble setting, the product is treated with water vapor, and then the finished film is shaped and rolled. Let the film absorb moisture in advance and reach saturation, roll it up under a certain tension, place it for 48-72 hours (the crystallization process after aging), and then unwind it for subsequent processing. At this time, the appearance, size and shrinkage of the film will be improved Nice improvement. Packaging, storage and transportation are also solved accordingly.
  • the advantages and beneficial effects of the present invention are that it solves the technical problem of uncontrollable post-shrinkage on the product surface after the nylon material product is blown.
  • the original size change rate was 12-15%, but now it can be controlled at about 4-6%.
  • the shrinkage of the film is more stable.
  • the original shrinkage rate changed from 7-8%, and now it is controlled at 2-3%. Due to the improvement of the flatness of the film, the subsequent processing has brought an increase in the yield, which is currently increased to 5%. Subsequent processing and production adjustments used to be 20 meters per minute, but now they are 35-40 meters per minute due to the improvement of the flatness of the film.
  • the puncture strength becomes larger, greater than 45N, and the heat sealing effect of subsequent products is good.
  • the product is toughened by water vapor and alcohol, and then the finished film is shaped and rolled. Let the film absorb moisture in advance and reach saturation, roll it up under a certain tension, place it for 48-72 hours (the crystallization process after aging), and then unwind it for subsequent processing. At this time, the appearance, size and shrinkage of the film will be improved Nice improvement. Packaging, storage and transportation are also solved accordingly.
  • the invention is easy to operate and implement, has remarkable effect and has strong application prospect.
  • Fig. 1 is a kind of process flow diagram that adopts three-bubble molding method of the present invention to prepare nylon surface layer tube film;
  • Fig. 2 is a kind of process steam pipeline structure schematic diagram that adopts three-bubble forming method to prepare nylon surface layer tube film of the present invention
  • Fig. 3 is a kind of technical porous structure blocking plate that adopts three-bubble forming method to prepare nylon surface layer tube membrane of the present invention
  • Fig. 4 is a kind of technological mesh structure retainer that adopts three-bubble forming method to prepare nylon surface layer tubular film of the present invention
  • a kind of technology that adopts three-bubble molding method to prepare nylon surface layer tube film comprises the following steps in turn: one bubble is extruded tube film through multi-layer co-extrusion film head and is inflated into film bubble, two The tube film is heated and inflated by bubbles, the tube film is shaped by three bubbles, and the tube film is rewound; the process of heating and expanding the tube film by two bubbles also includes humidifying and toughening the surface layer of the tube film, and the process of shaping the tube film by three bubbles includes The step of drying and heating the surface layer; the humidification and toughening treatment includes treating the surface layer of the tube membrane with alcohol toughening.
  • the humidifying and toughening treatment of the surface layer of the tube film includes humidifying the surface layer of the tube film by steam.
  • the alcohol used in the process of steam humidifying the surface layer of the tube membrane is methanol, and the volume ratio of methanol to steam is 1%.
  • a steam pipe is arranged near the surface layer of the cylindrical film, and a casing is arranged outside the steam pipe.
  • the wall is provided with a steam discharge hole at a position opposite to the nylon surface tube membrane.
  • a porous structure baffle is provided at the opening position of the steam discharge hole.
  • a manual valve is provided at the entrance of the steam pipeline to control the steam flow rate to 8L/min.
  • An annular water receiving tray is installed at the bottom of the steam pipe, and a waste gas recovery system is arranged above the steam pipe.
  • the temperature of the steam is 40° C.
  • the pressure is 0.2 MPa
  • the contact time between the steam and the surface of the nylon surface tube membrane is 1 second.
  • the drying and heating step adopts an infrared heating method, and the drying temperature is 150°C. After the winding, place it for 48 hours before performing subsequent processing steps.
  • a process for preparing nylon surface tube film by three-bubble molding method includes the following steps in turn: one bubble is extruded from the tube film through a multi-layer co-extrusion film head and injected into the film bubble Inflating, second-bubble heating and inflating the tube film, three-bubble tube film shaping, and tube film winding; the process of the second-bubble heating and blow-up tube film also includes humidifying and toughening the surface of the tube film, and the three-bubble shaping process includes Drying and heating the surface of the tube membrane; the humidification and toughening treatment includes treating the surface of the tube membrane with alcohols for toughening.
  • the humidifying and toughening treatment of the surface layer of the tube film includes humidifying the surface layer of the tube film by steam.
  • the alcohol used in the process of steam humidifying the surface layer of the tube membrane is ethanol, and the volume ratio of ethanol to the steam is 5%.
  • a steam pipe is arranged near the surface layer of the cylindrical film, and a casing is arranged outside the steam pipe.
  • the wall is provided with a steam discharge hole at a position opposite to the nylon surface tube membrane.
  • a net structure baffle is provided at the opening position of the steam discharge hole.
  • a manual valve is provided at the inlet of the steam pipeline to control the steam flow rate to 15L/min.
  • An annular water receiving tray is installed at the bottom of the steam pipe, and a waste gas recovery system is arranged above the steam pipe.
  • the temperature of the steam is 100° C.
  • the pressure is 0.6 MPa
  • the contact time between the steam and the surface of the nylon surface tube membrane is 3 seconds.
  • the drying and heating step adopts an infrared heating method, and the drying temperature is 300°C. After the winding, place it for 72 hours before performing subsequent processing steps.
  • a kind of technology that adopts three-bubble molding method to prepare nylon surface layer tube film comprises the following steps in turn: one bubble is extruded tube film through multi-layer co-extrusion film head and is inflated into film bubble, two The tube film is heated and inflated by bubbles, the tube film is shaped by three bubbles, and the tube film is rewound; the process of heating and expanding the tube film by two bubbles also includes humidifying and toughening the surface layer of the tube film, and the process of shaping the tube film by three bubbles includes The step of drying and heating the surface layer; the humidification and toughening treatment includes treating the surface layer of the tube membrane with alcohol toughening.
  • the humidifying and toughening treatment of the surface layer of the tube film includes humidifying the surface layer of the tube film by steam.
  • the alcohol used in the process of steam humidifying the surface layer of the tube film is tert-butanol, and the volume ratio of tert-butanol to steam is 3%.
  • a steam pipe is arranged near the surface layer of the cylindrical film, and a casing is arranged outside the steam pipe.
  • the wall is provided with a steam discharge hole at a position opposite to the nylon surface tube membrane.
  • a porous structure baffle is provided at the opening position of the steam discharge hole.
  • a manual valve is provided at the inlet of the steam pipeline to control the steam flow rate to 10 L/min.
  • An annular water receiving tray is installed at the bottom of the steam pipe, and a waste gas recovery system is arranged above the steam pipe.
  • the temperature of the steam is 100° C.
  • the pressure is 0.2 MPa
  • the contact time between the steam and the surface of the nylon surface tube membrane is 3 seconds.
  • the drying and heating step adopts an infrared heating method, and the drying temperature is 200°C. After the winding, place it for 72 hours before performing subsequent processing steps.
  • a steam pipe is arranged near the surface layer of the cylindrical film, and a casing is arranged outside the steam pipe.
  • the wall is provided with a steam discharge hole at a position opposite to the nylon surface tube membrane.
  • a net structure baffle is provided at the opening position of the steam discharge hole.
  • the entrance of the steam pipeline is provided with a manual valve to control the flow of steam to 12L/min.
  • An annular water receiving tray is installed at the bottom of the steam pipe, and a waste gas recovery system is arranged above the steam pipe.
  • the temperature of the steam is 40° C.
  • the pressure is 0.6 MPa
  • the contact time between the steam and the surface of the nylon surface tube membrane is 1 second.
  • the drying and heating step adopts an infrared heating method, and the drying temperature is 250°C. After the winding, place it for 48 hours before performing subsequent processing steps.
  • a process for preparing nylon surface tube film by three-bubble molding method includes the following steps in turn: one bubble is extruded from the tube film through a multi-layer co-extrusion film head and injected into the film bubble Inflating, second-bubble heating and inflating the tube film, three-bubble tube film shaping, and tube film winding; the process of the second-bubble heating and blow-up tube film also includes humidifying and toughening the surface of the tube film, and the three-bubble shaping process includes The step of drying and heating the surface layer of the tube film; the alcohol used in the steam humidification treatment on the surface layer of the tube film is ethanol, and the volume ratio of ethanol to the steam is 1%.
  • a steam pipe is arranged near the surface layer of the cylindrical film, and a casing is arranged outside the steam pipe.
  • the wall is provided with a steam discharge hole at a position opposite to the nylon surface tube membrane.
  • a net structure baffle is provided at the opening position of the steam discharge hole.
  • a manual valve is provided at the entrance of the steam pipeline to control the steam flow rate to 8L/min.
  • An annular water receiving tray is installed at the bottom of the steam pipe, and a waste gas recovery system is arranged above the steam pipe.
  • the temperature of the steam is 70° C.
  • the pressure is 0.4 MPa
  • the contact time between the steam and the surface of the nylon surface tube membrane is 3 seconds.
  • the drying and heating step adopts an infrared heating method, and the drying temperature is 250°C. After the winding, place it for 60 hours before carrying out subsequent processing steps.
  • a kind of technology that adopts three-bubble molding method to prepare nylon surface layer tube film comprises the following steps in turn: one bubble is extruded tube film through multi-layer co-extrusion film head and is inflated into film bubble, two The tube film is heated and inflated by bubbles, the tube film is shaped by three bubbles, and the tube film is rewound; the process of heating and expanding the tube film by two bubbles also includes humidifying and toughening the surface layer of the tube film, and the process of shaping the tube film by three bubbles includes The step of drying and heating the surface layer; the humidification and toughening treatment includes treating the surface layer of the tube membrane with alcohol toughening.
  • the humidifying and toughening treatment of the surface layer of the tube film includes humidifying the surface layer of the tube film by steam.
  • the alcohol used in the process of steam humidifying the surface layer of the tube film is isopropanol, and the volume ratio of isopropanol to steam is 2%.
  • a steam pipe is arranged near the surface layer of the cylindrical film, and a casing is arranged outside the steam pipe.
  • the wall is provided with a steam discharge hole at a position opposite to the nylon surface tube membrane.
  • a porous structure baffle is provided at the opening position of the steam discharge hole.
  • a manual valve is provided at the inlet of the steam pipeline to control the steam flow rate to 15L/min.
  • the bottom of the steam pipeline is equipped with an annular water receiving pan, and a waste gas recovery system is arranged above the steam pipeline.
  • the temperature of the steam is 60° C.
  • the pressure is 0.5 MPa
  • the contact time between the steam and the surface of the nylon surface tube membrane is 2.5 seconds.
  • the drying and heating step adopts an infrared heating method, and the drying temperature is 150°C. After the winding 6 was placed for 55 hours, subsequent processing steps were performed.
  • the comparative example is based on Example 6, and the difference is that the nylon surface tube film in Comparative Example 1 is not subjected to alcohol toughening treatment, and the nylon surface tube film in Comparative Example 2 is humidified by adding isopropanol to the humidifier.
  • the shrinkage rate of the invented product is 2-3%, and the shrinkage rate of the comparative example 1 reaches 8%, the difference is obvious, and it is also obviously better than the comparative example 2.
  • the puncture strength of the invention is greater than 45N, and the puncture strength of the nylon surface membrane of Comparative Example 1 is only 25.6N.
  • the invention has good heat-sealing properties, and the comparative example 1 is broken when heat-sealed, while the comparative example 2 is wrinkled when heat-sealed, and the processing technology of embodiments 1-6 has obvious advantages.
  • the present invention solves the technical problem of uncontrollable back shrinkage on the product surface after blow molding of nylon material products. Change the appearance of the heat shrinkable film, and the flatness of the film becomes better.
  • the original size change rate was 12-15%, but now it can be controlled at about 4-6%.
  • the shrinkage of the film is more stable.
  • the original shrinkage rate changed from 7-8%, and now it is controlled at 2-3%. Due to the improvement of the flatness of the film, the subsequent processing has brought an increase in the yield, which is currently increased to 5%. Subsequent processing and production adjustments used to be 20 meters per minute, but now they are 35-40 meters per minute due to the improvement of the flatness of the film.
  • the puncture strength becomes larger, greater than 45N, and the heat sealing effect of subsequent products is good.
  • the product is toughened by water vapor and alcohol, and then the finished film is shaped and rolled. Let the film absorb moisture in advance and reach saturation, roll it up under a certain tension, place it for 48-72 hours (the crystallization process after aging), and then unwind it for subsequent processing. At this time, the appearance, size and shrinkage of the film will be improved Nice improvement. Packaging, storage and transportation are also solved accordingly.
  • the invention is easy to operate and implement, has remarkable effect and has strong application prospect.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • General Engineering & Computer Science (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

本发明公开了一种采用三泡成型法制备尼龙表层筒膜的工艺，其特征在于：依次包括如下步骤：一泡通过多层共挤膜头挤出筒膜并向膜泡内充气、二泡加热吹涨筒膜、三泡筒膜定型、筒膜收卷；所述二泡加热吹涨筒膜过程中还包括对筒膜表层进行加湿增韧处理，三泡定型过程中包括对筒膜表层进行烘干加热步骤；所述加湿增韧处理包括采用醇类增韧对筒膜表层进行处理。本发明可实现改变热收缩膜外观，尺寸变化率变小，膜的收缩率变小且更稳定，穿刺强度大，热封效果好。

Description

一种采用三泡成型法制备尼龙表层筒膜的工艺 技术领域
本发明涉及尼龙材料技术领域，具体涉及一种采用三泡成型法制备尼龙表层筒膜的工艺。
背景技术
一般的尼龙材料容易吸水，含有亲水酰胺基，尼龙6(PA6)，尼龙66(PA66)，是一种结晶性热塑性材料；对结晶性聚合物而言，在吹塑加工时很迅速的冷却使得尼龙材料无法自然结晶定型。在加工成型以后产品表层的尼龙非常容易吸收到空气中的水份。表层尼龙吸收水份后会对产品的外观、尺寸、收缩率等物理指标带来的了很大的影响，膜卷的宽度收缩严重，卷表不平整，袋子的长度和宽度的尺寸变化大，表面暴露在空气中一定的时间后就会有变皱的现象，影响膜卷和袋子的外观和质量，同时还影响一些其他物理性能的指标。另外产品的包装、储存、运输等方面会由于这一问题而非常麻烦。
考虑让表层尼龙材料在生产加工过程中提前吸收水份，并达到饱和的方式来解决表层尼龙材料产品吹塑后在产品表面后收缩不可控的问题。并将研究方向和新增装置设计在二泡生产过程和三泡生产过程中。在二泡生产时通过加装加湿设备提前让表层吸水，但是由于二泡的距离较长，且是由下向上运行，加湿设备无法做到稳定和均匀，产品表面多余的水分也无法被及时收集和处理。
因此研究一种薄膜外观好，平整度佳尺寸变化率小，伸缩率低的三泡法表层尼龙热收缩膜的成型加工工艺是本领域技术人员亟待解决的技术问题。
发明内容
本发明的目的在于，克服现有技术中存在的缺陷，提供一种三泡 法表层尼龙热收缩膜的成型加工工艺，可实现改变热收缩膜外观，尺寸变化率变小，膜的收缩率变小且更稳定，穿刺强度大，热封效果好。
为实现上述目的，本发明的技术方案是一种采用三泡成型法制备尼龙表层筒膜的工艺，依次包括如下步骤：一泡通过多层共挤膜头挤出筒膜并向膜泡内充气、二泡加热吹涨筒膜、三泡筒膜定型、筒膜收卷；所述二泡加热吹涨筒膜过程中还包括对筒膜表层进行加湿增韧处理，三泡定型过程中包括对筒膜表层进行烘干加热步骤；所述加湿增韧处理包括采用醇类增韧对筒膜表层进行处理。
进一步的技术方案是，所述对筒膜表层进行加湿增韧处理包括通过蒸汽对筒膜表层进行加湿处理。蒸汽加湿的方式，热值高，加湿效果好，均匀速度快。
进一步的技术方案是，所述对筒膜表层进行蒸汽加湿处理过程中使用的醇类为甲醇、乙醇、叔丁醇、异丙醇中的一种或几种，所述醇类占蒸汽体积比为1-5％。蒸汽与醇类混合加热，加湿增韧同步进行，热值稳定，传质迅速、穿透性强，促进醇类物质与尼龙材料表面产生化学作用，尼龙热收缩膜产生显著的增韧效果。
进一步的技术方案是，在所述对筒膜表层进行加湿增韧处理步骤中，在筒膜表层附近设置有蒸汽管道，蒸汽管道外设有外壳，所述蒸汽管道为圆筒状盘旋分布结构，在所述蒸汽管道内侧壁与尼龙表层筒膜相对位置开设有蒸汽排出孔。蒸汽管道、外壳材质为304不锈钢，蒸汽管道排出孔的设置，能在膜泡上实现均匀的喷洒。依靠蒸汽压力作用将雾状的有温度的蒸汽和醇混合气体吹到膜的表面，让膜的表面吸收到水分，通过调整蒸汽的压力和控制温度来达到蒸汽的均匀度。圆筒状盘旋蒸汽管道与膜卷尼龙表层筒膜接触紧密，接触时间1-3秒，充分吸潮，尺寸均匀、稳定。解决了环形膜表面的加水增韧浪费大、效果差的问题，优于现在的平法吸潮。
进一步的技术方案是，所述蒸汽排出孔的开口位置处设有多孔状 或网状结构挡片。多孔状或网状结构挡片可以均匀的将蒸汽气体更加分散均匀施加于热收缩膜表面，受热均匀，传质效果好。
进一步的技术方案是，所述蒸汽管道接入口处设置有手动阀，控制蒸汽流量为8-15L/min。手动阀可以用于控制蒸汽流量。
进一步的技术方案是，所述蒸汽管道底部安装有环形接水盘，蒸汽管道上方设置有废气回收系统。环形接水盘的设置用于收集和排出液化的醇水物质，防止污染环境，液化的醇水物质还可以回用。废气回收系统用于回收有机蒸汽，防止污染环境。
进一步的技术方案是，所述蒸汽温度为40-100℃，压力为0.2-0.6MPa，蒸汽与尼龙表层筒膜表面的接触时间为1-3秒。该工艺的难度在于对蒸汽压力和温度的控制，如果蒸汽压力过大，蒸汽会过量，膜的表层的水分会过于饱和吸收不了，过多的蒸汽变成水溢出来的现象，造成能源资源浪费，同时影响后续烘干操作，造成能耗增加，产量下降。如果蒸汽太少膜吸收不均匀和不饱和的情况下，则无法解决产品表面后收缩不可控的技术性难题。膜卷和袋子的表面还会有不平整的现象，膜吸收水分之后再进入烘箱定型，收卷，让膜在有水分有张力的情况下进行形变，使产品在熟化完成后再进行后道加工和使用，这样才更稳定。
进一步的技术方案是，所述烘干加热步骤采用红外加热方式，烘干温度为150-300℃。红外线是指波长大约在0.77-1000μm范围的电磁波。对工业加热而言，利用波长2.5-15μm电磁波加热即为红外加热，习惯上也称之为远红外加热。由于大多数有机化合物对远红外线有强烈的吸收特性，因此，利用红外线加热会有较高的热效率。吸潮后的膜卷进入红外加热，吸干表面，去除游离水，而与尼龙吸湿的水分为结合水，在红外烘干温度控制下，则不受影响，保证了尼龙材料的结晶定型。
进一步的技术方案是，在所述收卷步骤后筒膜需要放置48-72小 时再进行后续处理步骤。三泡定型前产品经过水蒸汽的处理，然后再定型、收卷成品膜。让薄膜提前吸收到水分并达到饱和状态，在一定的张力下收卷，放置48-72个小时(熟化后结晶过程)之后再放卷进行后续加工，此时膜的外观、尺寸、收缩率得到很好的改善。包装、储存、运输也相应的得到解决。
本发明的优点和有益效果在于：解决了尼龙材料产品吹塑后在产品表面后收缩不可控的技术性难题。改变热收缩膜外观，薄膜平整度变得更好。原来尺寸变化率为12-15％，现在能够控制在4-6％左右。膜的收缩率更稳定。原来的收缩率变化7-8％，现在控制在2-3％。由于膜的平整度提高给后续的加工带来了成品率的提高，目前提高到5％。后续的加工生产调整之前是每分钟20米，由于膜的平整度改善现在每分钟35-40米。穿刺强度变大，大于45N，同时后续产品热封效果好。三泡定型前产品经过水蒸汽加醇类的增韧处理，然后再定型、收卷成品膜。让薄膜提前吸收到水分并达到饱和状态，在一定的张力下收卷，放置48-72个小时(熟化后结晶过程)之后再放卷进行后续加工，此时膜的外观、尺寸、收缩率得到很好的改善。包装、储存、运输也相应的得到解决。本发明易于操作实施，效果显著，具有较强的应用前景。
附图说明
图1是本发明一种采用三泡成型法制备尼龙表层筒膜的工艺流程图；
图2是本发明一种采用三泡成型法制备尼龙表层筒膜的工艺蒸汽管道结构示意图；
图3是本发明一种采用三泡成型法制备尼龙表层筒膜的工艺多孔状结构挡片；
图4是本发明一种采用三泡成型法制备尼龙表层筒膜的工艺网状结构挡片；
图中：1、一泡筒膜挤出膜管；2、二泡加热吹涨筒膜；3、红外加热；4、接水盘；5、三泡筒膜定型；6、筒膜收卷；7、外壳；8、蒸汽排出孔；9、尼龙表层筒膜；10、蒸汽管道；11、多孔状结构挡片；12、网状结构挡片；13、废气回收系统；14、蒸汽加湿增韧。
具体实施方式
下面结合附图和实施例，对本发明的具体实施方式作进一步描述。以下实施例仅用于更加清楚地说明本发明的技术方案，而不能以此来限制本发明的保护范围。
实施例1
如图1至图3所示，一种采用三泡成型法制备尼龙表层筒膜的工艺，依次包括如下步骤：一泡通过多层共挤膜头挤出筒膜并向膜泡内充气、二泡加热吹涨筒膜、三泡筒膜定型、筒膜收卷；所述二泡加热吹涨筒膜过程中还包括对筒膜表层进行加湿增韧处理，三泡定型过程中包括对筒膜表层进行烘干加热步骤；所述加湿增韧处理包括采用醇类增韧对筒膜表层进行处理。所述对筒膜表层进行加湿增韧处理包括通过蒸汽对筒膜表层进行加湿处理。所述对筒膜表层进行蒸汽加湿处理过程中使用的醇类为甲醇，甲醇占蒸汽体积比为1％。在所述对筒膜表层进行加湿增韧处理步骤中，在筒膜表层附近设置有蒸汽管道，蒸汽管道外设有外壳，所述蒸汽管道为圆筒状盘旋分布结构，在所述蒸汽管道内侧壁与尼龙表层筒膜相对位置开设有蒸汽排出孔。所述蒸汽排出孔的开口位置处设有多孔状结构挡片。所述蒸汽管道接入口处设置有手动阀，控制蒸汽流量为8L/min。所述蒸汽管道底部安装有环形接水盘，蒸汽管道上方设置有废气回收系统。所述蒸汽温度为40℃，压力为0.2MPa，蒸汽与尼龙表层筒膜表面的接触时间为1秒。所述烘干加热步骤采用红外加热方式，烘干温度为150℃。所述收卷后放置48小时再进行后续处理步骤。
实施例2
如图1、图2、图4所示，一种采用三泡成型法制备尼龙表层筒膜的工艺，依次包括如下步骤：一泡通过多层共挤膜头挤出筒膜并向膜泡内充气、二泡加热吹涨筒膜、三泡筒膜定型、筒膜收卷；所述二泡加热吹涨筒膜过程中还包括对筒膜表层进行加湿增韧处理，三泡定型过程中包括对筒膜表层进行烘干加热步骤；所述加湿增韧处理包括采用醇类增韧对筒膜表层进行处理。所述对筒膜表层进行加湿增韧处理包括通过蒸汽对筒膜表层进行加湿处理。所述对筒膜表层进行蒸汽加湿处理过程中使用的醇类为乙醇，乙醇占蒸汽体积比为5％。在所述对筒膜表层进行加湿增韧处理步骤中，在筒膜表层附近设置有蒸汽管道，蒸汽管道外设有外壳，所述蒸汽管道为圆筒状盘旋分布结构，在所述蒸汽管道内侧壁与尼龙表层筒膜相对位置开设有蒸汽排出孔。所述蒸汽排出孔的开口位置处设有网状结构挡片。所述蒸汽管道接入口处设置有手动阀，控制蒸汽流量为15L/min。所述蒸汽管道底部安装有环形接水盘，蒸汽管道上方设置有废气回收系统。所述蒸汽温度为100℃，压力为0.6MPa，蒸汽与尼龙表层筒膜表面的接触时间为3秒。所述烘干加热步骤采用红外加热方式，烘干温度为300℃。所述收卷后放置72小时再进行后续处理步骤。
实施例3
如图1至图3所示，一种采用三泡成型法制备尼龙表层筒膜的工艺，依次包括如下步骤：一泡通过多层共挤膜头挤出筒膜并向膜泡内充气、二泡加热吹涨筒膜、三泡筒膜定型、筒膜收卷；所述二泡加热吹涨筒膜过程中还包括对筒膜表层进行加湿增韧处理，三泡定型过程中包括对筒膜表层进行烘干加热步骤；所述加湿增韧处理包括采用醇类增韧对筒膜表层进行处理。所述对筒膜表层进行加湿增韧处理包括通过蒸汽对筒膜表层进行加湿处理。所述对筒膜表层进行蒸汽加湿处理过程中使用的醇类为叔丁醇，叔丁醇占蒸汽体积比为3％。在所述对筒膜表层进行加湿增韧处理步骤中，在筒膜表层附近设置有蒸汽管 道，蒸汽管道外设有外壳，所述蒸汽管道为圆筒状盘旋分布结构，在所述蒸汽管道内侧壁与尼龙表层筒膜相对位置开设有蒸汽排出孔。所述蒸汽排出孔的开口位置处设有多孔状结构挡片。所述蒸汽管道接入口处设置有手动阀，控制蒸汽流量为10L/min。所述蒸汽管道底部安装有环形接水盘，蒸汽管道上方设置有废气回收系统。所述蒸汽温度为100℃，压力为0.2MPa，蒸汽与尼龙表层筒膜表面的接触时间为3秒。所述烘干加热步骤采用红外加热方式，烘干温度为200℃。所述收卷后放置72小时再进行后续处理步骤。
实施例4
如图1、图2、图4所示，一种采用三泡成型法制备尼龙表层筒膜的工艺，依次包括如下步骤：一泡通过多层共挤膜头挤出筒膜并向膜泡内充气、二泡加热吹涨筒膜、三泡筒膜定型、筒膜收卷；所述二泡加热吹涨筒膜过程中还包括对筒膜表层进行加湿增韧处理，三泡定型过程中包括对筒膜表层进行烘干加热步骤；所述对筒膜表层进行蒸汽加湿处理使用乙醇wt％：异丙醇wt％＝3:1的醇类，所述醇类占蒸汽体积比为4％。在所述对筒膜表层进行加湿增韧处理步骤中，在筒膜表层附近设置有蒸汽管道，蒸汽管道外设有外壳，所述蒸汽管道为圆筒状盘旋分布结构，在所述蒸汽管道内侧壁与尼龙表层筒膜相对位置开设有蒸汽排出孔。所述蒸汽排出孔的开口位置处设有网状结构挡片。所述蒸汽管道接入口处设置有手动阀，控制蒸汽流量为12L/min。所述蒸汽管道底部安装有环形接水盘，蒸汽管道上方设置有废气回收系统。所述蒸汽温度为40℃，压力为0.6MPa，蒸汽与尼龙表层筒膜表面的接触时间为1秒。所述烘干加热步骤采用红外加热方式，烘干温度为250℃。所述收卷后放置48小时再进行后续处理步骤。
实施例5
如图1、图2、图4所示，一种采用三泡成型法制备尼龙表层筒膜的工艺，依次包括如下步骤：一泡通过多层共挤膜头挤出筒膜并向膜 泡内充气、二泡加热吹涨筒膜、三泡筒膜定型、筒膜收卷；所述二泡加热吹涨筒膜过程中还包括对筒膜表层进行加湿增韧处理，三泡定型过程中包括对筒膜表层进行烘干加热步骤；所述对筒膜表层进行蒸汽加湿处理使用的醇类为乙醇，乙醇占蒸汽体积比为1％。在所述对筒膜表层进行加湿增韧处理步骤中，在筒膜表层附近设置有蒸汽管道，蒸汽管道外设有外壳，所述蒸汽管道为圆筒状盘旋分布结构，在所述蒸汽管道内侧壁与尼龙表层筒膜相对位置开设有蒸汽排出孔。所述蒸汽排出孔的开口位置处设有网状结构挡片。所述蒸汽管道接入口处设置有手动阀，控制蒸汽流量为8L/min。所述蒸汽管道底部安装有环形接水盘，蒸汽管道上方设置有废气回收系统。所述蒸汽温度为70℃，压力为0.4MPa，蒸汽与尼龙表层筒膜表面的接触时间为3秒。所述烘干加热步骤采用红外加热方式，烘干温度为250℃。所述收卷后放置60小时再进行后续处理步骤。
实施例6
如图1至图3所示，一种采用三泡成型法制备尼龙表层筒膜的工艺，依次包括如下步骤：一泡通过多层共挤膜头挤出筒膜并向膜泡内充气、二泡加热吹涨筒膜、三泡筒膜定型、筒膜收卷；所述二泡加热吹涨筒膜过程中还包括对筒膜表层进行加湿增韧处理，三泡定型过程中包括对筒膜表层进行烘干加热步骤；所述加湿增韧处理包括采用醇类增韧对筒膜表层进行处理。所述对筒膜表层进行加湿增韧处理包括通过蒸汽对筒膜表层进行加湿处理。所述对筒膜表层进行蒸汽加湿处理过程中使用的醇类为异丙醇，异丙醇占蒸汽体积比为2％。在所述对筒膜表层进行加湿增韧处理步骤中，在筒膜表层附近设置有蒸汽管道，蒸汽管道外设有外壳，所述蒸汽管道为圆筒状盘旋分布结构，在所述蒸汽管道内侧壁与尼龙表层筒膜相对位置开设有蒸汽排出孔。所述蒸汽排出孔的开口位置处设有多孔状结构挡片。所述蒸汽管道接入口处设置有手动阀，控制蒸汽流量为15L/min。所述蒸汽管道底部安 装有环形接水盘，蒸汽管道上方设置有废气回收系统。所述蒸汽温度为60℃，压力为0.5MPa，蒸汽与尼龙表层筒膜表面的接触时间为2.5秒。所述烘干加热步骤采用红外加热方式，烘干温度为150℃。所述收卷6后放置55小时再进行后续处理步骤。
对比例
对比例以实施例6为基础，区别在于，对比例1中尼龙表层筒膜未进行醇类增韧处理，对比例2中尼龙表层筒膜采用加湿器加入异丙醇加湿。
实施例1-6的发明与对比例实验结果
测试项目 外观 尺寸变化率 收缩率 穿刺强度(N) 热封性能
实施例1 平整 4.5％ 2％ 45.1 良好
实施例2 平整 4.0％ 2％ 48.4 良好
实施例3 平整 5.3％ 3％ 49.7 良好
实施例4 平整 5.2％ 2％ 54.3 良好
实施例5 平整 6.0％ 3％ 47.9 良好
实施例6 平整 5.7％ 3％ 49.2 良好
对比例1 变形 13.2％ 8％ 25.6 破开
对比例2 变形 10.6％ 7％ 37.2 起皱
通过上表数据可以看出实施例1-6的发明尼龙表层筒膜外观平整，而对比例1尼龙表层筒膜未进行醇类增韧处理，对比例2尼龙表层筒膜采用加湿器加入异丙醇加湿它们在外观上均发生了变形的现象。发明的尺寸变化率最高6％，而对比例1尺寸变化率达到了13.2％，对比例2虽然采用了加湿器加湿，但是其传质能力差，加湿效率低，利用湿度平衡传递，产品尺寸变化率达到10.6％。发明的产品收缩率在2-3％，对比例1的收缩率达到8％，差距明显，也明显优于对比例2。发明的穿刺强度大于45N，对比例1尼龙表层筒膜穿刺强度仅有25.6N。发明具有良好的热封性能，对比例1热封时破开，而对比例2热封时起 皱，实施例1-6的加工工艺具有明显优势。
综上所述本发明解决了尼龙材料产品吹塑后在产品表面后收缩不可控的技术性难题。改变热收缩膜外观，薄膜平整度变得更好。原来尺寸变化率为12-15％，现在能够控制在4-6％左右。膜的收缩率更稳定。原来的收缩率变化7-8％，现在控制在2-3％。由于膜的平整度提高给后续的加工带来了成品率的提高，目前提高到5％。后续的加工生产调整之前是每分钟20米，由于膜的平整度改善现在每分钟35-40米。穿刺强度变大，大于45N，同时后续产品热封效果好。三泡定型前产品经过水蒸汽加醇类的增韧处理，然后再定型、收卷成品膜。让薄膜提前吸收到水分并达到饱和状态，在一定的张力下收卷，放置48-72个小时(熟化后结晶过程)之后再放卷进行后续加工，此时膜的外观、尺寸、收缩率得到很好的改善。包装、储存、运输也相应的得到解决。本发明易于操作实施，效果显著，具有较强的应用前景。
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明技术原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。

Claims (10)

  1. 一种采用三泡成型法制备尼龙表层筒膜的工艺，其特征在于：依次包括如下步骤：一泡通过多层共挤膜头挤出筒膜并向膜泡内充气、二泡加热吹涨筒膜、三泡筒膜定型、筒膜收卷；所述二泡加热吹涨筒膜过程中还包括对筒膜表层进行加湿增韧处理，三泡定型过程中包括对筒膜表层进行烘干加热步骤；所述加湿增韧处理包括采用醇类增韧对筒膜表层进行处理。
  2. 根据权利要求1所述的一种采用三泡成型法制备尼龙表层筒膜的工艺，其特征在于：所述对筒膜表层进行加湿增韧处理包括通过蒸汽对筒膜表层进行加湿处理。
  3. 根据权利要求2所述的一种采用三泡成型法制备尼龙表层筒膜的工艺，其特征在于：所述对筒膜表层进行蒸汽加湿处理过程中使用的醇类为甲醇、乙醇、叔丁醇、异丙醇中的一种或几种，所述醇类占蒸汽体积比为1-5％。
  4. 根据权利要求3所述的一种采用三泡成型法制备尼龙表层筒膜的工艺，其特征在于：在所述对筒膜表层进行加湿增韧处理步骤中，在筒膜表层附近设置有蒸汽管道，蒸汽管道外设有外壳，所述蒸汽管道为圆筒状盘旋分布结构，在所述蒸汽管道内侧壁与尼龙表层筒膜相对位置开设有蒸汽排出孔。
  5. 根据权利要求4所述的一种采用三泡成型法制备尼龙表层筒膜的工艺，其特征在于：所述蒸汽排出孔的开口位置处设有多孔状或网状结构挡片。
  6. 根据权利要求5所述的一种采用三泡成型法制备尼龙表层筒膜的工艺，其特征在于：所述蒸汽管道接入口处设置有手动阀，控制蒸汽流量为8-15L/min。
  7. 根据权利要求6所述的一种采用三泡成型法制备尼龙表层筒膜的工艺，其特征在于：所述蒸汽管道底部安装有环形接水盘，蒸汽管 道上方设置有废气回收系统。
  8. 根据权利要求7所述的一种采用三泡成型法制备尼龙表层筒膜的工艺，其特征在于：所述蒸汽温度为40-100℃，压力为0.2-0.6MPa，蒸汽与尼龙表层筒膜表面的接触时间为1-3秒。
  9. 根据权利要求8所述的一种采用三泡成型法制备尼龙表层筒膜的工艺，其特征在于：所述烘干加热步骤采用红外加热方式，烘干温度为150-300℃。
  10. 根据权利要求9所述的一种采用三泡成型法制备尼龙表层筒膜的工艺，其特征在于：在所述收卷步骤后筒膜需要放置48-72小时再进行后续处理步骤。
PCT/CN2022/097269 2021-12-30 2022-06-07 一种采用三泡成型法制备尼龙表层筒膜的工艺 WO2023123868A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202111654818.1A CN114434768B (zh) 2021-12-30 2021-12-30 一种采用三泡成型法制备尼龙表层筒膜的工艺
CN202111654818.1 2021-12-30

Publications (1)

Publication Number Publication Date
WO2023123868A1 true WO2023123868A1 (zh) 2023-07-06

Family

ID=81365398

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/097269 WO2023123868A1 (zh) 2021-12-30 2022-06-07 一种采用三泡成型法制备尼龙表层筒膜的工艺

Country Status (2)

Country Link
CN (1) CN114434768B (zh)
WO (1) WO2023123868A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114434768B (zh) * 2021-12-30 2024-04-23 升辉新材料股份有限公司 一种采用三泡成型法制备尼龙表层筒膜的工艺

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004217803A (ja) * 2003-01-15 2004-08-05 Dainippon Printing Co Ltd バリア性フィルムおよびその製造法
CN101941295A (zh) * 2010-03-15 2011-01-12 天津运城塑业有限公司 双向拉伸尼龙薄膜改性设备及使用方法
CN105040124A (zh) * 2015-06-26 2015-11-11 北京三联虹普新合纤技术服务股份有限公司 一种粗旦尼龙6全牵伸母丝纤维生产工艺
CN204817037U (zh) * 2015-07-24 2015-12-02 宁波沥高复合材料有限公司 一种尼龙膜在线加湿装置
CN109367046A (zh) * 2018-09-26 2019-02-22 江阴长庚高科技材料有限公司 一种高抗冲双向拉伸聚酰胺薄膜及其三泡生产方法与应用
CN114434768A (zh) * 2021-12-30 2022-05-06 升辉新材料股份有限公司 一种采用三泡成型法制备尼龙表层筒膜的工艺

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5115144B2 (zh) * 1972-02-23 1976-05-14
JP4428690B2 (ja) * 2003-04-25 2010-03-10 清二 加川 ポリブチレンテレフタレートフィルムの製造方法及び製造装置、並びに形状記憶ポリブチレンテレフタレート積層フィルム
MX2014016023A (es) * 2014-12-19 2016-04-08 Zubex Ind Sa De Cv Proceso de obtención de una película biorentada, coextruida y de bajo espesor fabricada por proceso de 3 burbujas que al momento de ser termoformada proporciona un espesor uniforme en la charola formada.
CN107009608A (zh) * 2016-01-28 2017-08-04 扬州泛亚薄膜材料有限公司 红外线二次加热吹膜法pvc热收缩膜制作设备
CN108527898B (zh) * 2018-04-02 2019-12-06 江阴市格瑞包装材料有限公司 一种多层共挤膜的抗卷曲处理工艺
CN109334060B (zh) * 2018-10-18 2021-02-09 宜兴市光辉包装材料有限公司 二泡内注水吹胀pvc热收缩标签膜制备方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004217803A (ja) * 2003-01-15 2004-08-05 Dainippon Printing Co Ltd バリア性フィルムおよびその製造法
CN101941295A (zh) * 2010-03-15 2011-01-12 天津运城塑业有限公司 双向拉伸尼龙薄膜改性设备及使用方法
CN105040124A (zh) * 2015-06-26 2015-11-11 北京三联虹普新合纤技术服务股份有限公司 一种粗旦尼龙6全牵伸母丝纤维生产工艺
CN204817037U (zh) * 2015-07-24 2015-12-02 宁波沥高复合材料有限公司 一种尼龙膜在线加湿装置
CN109367046A (zh) * 2018-09-26 2019-02-22 江阴长庚高科技材料有限公司 一种高抗冲双向拉伸聚酰胺薄膜及其三泡生产方法与应用
CN114434768A (zh) * 2021-12-30 2022-05-06 升辉新材料股份有限公司 一种采用三泡成型法制备尼龙表层筒膜的工艺

Also Published As

Publication number Publication date
CN114434768B (zh) 2024-04-23
CN114434768A (zh) 2022-05-06

Similar Documents

Publication Publication Date Title
WO2020047958A1 (zh) 一种超临界流体制备无模立体结构发泡制品的方法
WO2023123868A1 (zh) 一种采用三泡成型法制备尼龙表层筒膜的工艺
US4525377A (en) Method of applying coating
WO2018040624A1 (zh) 一种制备热塑性聚合物发泡珠粒的方法
CN105733516A (zh) 一种基于石墨烯的复合相变膜及其制备方法
CN106393542B (zh) 一种高效型eps泡沫产品的生产工艺
CN111113746A (zh) 一种用于高分子化工材料加工的冷却成型装置
CN111668432B (zh) 一种锂离子电池涂层隔膜及其加工工艺
CN102672872B (zh) 一种电子辐照交联聚乙烯发泡设备
JP6097151B2 (ja) ガス分離膜の製造方法
CN107399733A (zh) 一种卷对卷的石墨烯薄膜制备装置
US4443399A (en) Method of producing biaxially oriented sheet or film and apparatus therefor
CN206796589U (zh) 一种塑料编织袋扁丝拉丝机
CN209512447U (zh) 锂电池隔膜干燥装置
CN108359123B (zh) 一种热塑性聚合物发泡珠粒及其制备方法
CN100355554C (zh) 连续生产正交复合双向抗拉有热封层筒形膜的方法及装置
CN107839206B (zh) 膜延伸装置以及膜制造方法
CN1311960C (zh) 连续生产正交复合双向抗拉有热封层筒形膜的方法及装置
CN211662466U (zh) 一种用于高分子化工材料加工的冷却成型装置
CN211782289U (zh) 一种微生态产品用喷雾干燥装置
CN109137617B (zh) 一种涂布生产装置及其使用方法
CN107946539A (zh) 涂布烘干设备
CN218876256U (zh) 一种pvb加热拉伸展平装置
CN210362114U (zh) 一种用于生产收缩膜的二次加热装置
CN212619688U (zh) 一种瓦楞纸箱生产线的低成本烘干装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22913157

Country of ref document: EP

Kind code of ref document: A1