CN212555127U - High-shrinkage high-barrier film blowing production equipment - Google Patents
High-shrinkage high-barrier film blowing production equipment Download PDFInfo
- Publication number
- CN212555127U CN212555127U CN202020333801.0U CN202020333801U CN212555127U CN 212555127 U CN212555127 U CN 212555127U CN 202020333801 U CN202020333801 U CN 202020333801U CN 212555127 U CN212555127 U CN 212555127U
- Authority
- CN
- China
- Prior art keywords
- forming unit
- nip roller
- bubble forming
- traction nip
- traction
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 238000010096 film blowing Methods 0.000 title claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 230000007246 mechanism Effects 0.000 claims abstract description 39
- 238000003860 storage Methods 0.000 claims abstract description 11
- 238000004804 winding Methods 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims description 31
- 238000001125 extrusion Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 14
- 239000000919 ceramic Substances 0.000 claims description 4
- 230000005855 radiation Effects 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 2
- 230000005012 migration Effects 0.000 claims description 2
- 238000013508 migration Methods 0.000 claims description 2
- 238000005187 foaming Methods 0.000 abstract description 7
- 239000000463 material Substances 0.000 description 13
- 230000008569 process Effects 0.000 description 10
- 235000013372 meat Nutrition 0.000 description 7
- 239000012785 packaging film Substances 0.000 description 6
- 229920006280 packaging film Polymers 0.000 description 6
- 229920006257 Heat-shrinkable film Polymers 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 235000013622 meat product Nutrition 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 238000009998 heat setting Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
Images
Landscapes
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
A high-shrinkage high-barrier film blowing production device comprises a first bubble forming unit, a second bubble forming unit, a third bubble forming unit and a finished film winding unit, wherein a cold water bath mechanism is arranged between the first bubble forming unit and the second bubble forming unit; the cold water bath mechanism comprises a cold water tank, a cooler is matched with the cold water tank, and a guide roller is arranged in the cold water tank; a hot water bath mechanism is also arranged between the second bubble forming unit and the third bubble forming unit; the hot water bath mechanism comprises a hot water tank, a heater is matched with the hot water tank, and a guide roller is arranged in the hot water tank; and a film storage mechanism is also arranged between the second bubble forming unit and the third bubble forming unit. The utility model discloses make the workman can implement the foaming and the work of aerifing of third bubble very leisurely, and the film shrinkage factor of producing is big and stable, and the skin performance is good.
Description
Technical Field
The utility model belongs to the technical field of film production equipment, concretely relates to blown film production equipment for producing high shrinkage factor high resistant barrier film.
Background
The heat shrinkable film is a thermoplastic plastic film which is shrunk by heating in the using process, and can be applied to chilled meat preservation. The ideal chilled meat packaging film requires good barrier property, low heat shrinkage use temperature, high heat shrinkage stability and large shrinkage rate, so that the film has good skin property and low shrinkage force (to avoid extrusion of blood). Therefore, the chilled fresh meat packaging film is a multilayer co-extrusion composite film.
In the multilayer co-extrusion production process of the heat shrinkable film, after a molten resin material is extruded from a die head, the molten resin material is directly clamped by a traction clamping roller above or below the die head to form a film bubble, the film bubble is vertically and rapidly drawn by the traction clamping roller to be stretched and thinned, and meanwhile, the thinned film bubble is blown in the radial direction (horizontal direction) under the action of compressed air because the film bubble is filled with the compressed air.
Blown film processes for producing heat shrinkable films are generally classified into single bubble process, double bubble process and triple bubble process. The common single-bubble method and double-bubble method are not suitable for producing the heat shrinkable film for packaging the chilled fresh meat products.
The three-bubble blown film production equipment comprises a first bubble forming unit, a second bubble forming unit, a third bubble forming unit and a finished product film winding unit, wherein the second bubble forming unit is positioned at the downstream of the first bubble forming unit, the third bubble forming unit is positioned at the downstream of the second bubble forming unit, and the finished product film winding unit is positioned at the downstream of the third bubble forming unit; the first bubble forming unit comprises an extrusion die head and a first traction nip roller, an extrusion opening of the extrusion die head faces downwards, and the first traction nip roller is positioned below the extrusion die head; the second bubble forming unit comprises a second traction nip roller and a third traction nip roller, the second traction nip roller is positioned above the third traction nip roller, and a heating box is arranged between the second traction nip roller and the third traction nip roller; the third bubble forming unit comprises a fourth traction nip roller and a fifth traction nip roller, the fourth traction nip roller is positioned above the fifth traction nip roller, and a heating box is arranged between the fourth traction nip roller and the fifth traction nip roller; the rotating speed of the third traction nip roller is greater than that of the second traction nip roller, and the rotating speed of the second traction nip roller is equal to that of the first traction nip roller; the rotating speed of the fourth traction nip roller and the rotating speed of the fifth traction nip roller are both equal to the rotating speed of the third traction nip roller.
In the initial stage of each film blowing, when the front end of the film bubble blank is just extruded from the machine head, the traction nip rollers are temporarily opened and cannot clamp the film bubble, and workers need to hold the front end of the film bubble to sequentially pass through the first traction nip roller, the second traction nip roller, the third traction nip roller, the fourth traction nip roller and the fifth traction nip roller. After the film bubble passes through the second traction nip roller and the third traction nip roller, the second traction nip roller and the third traction nip roller begin to clamp and close, and a second bubble is formed; after the film bubble passes through the fourth traction nip roller and the fifth traction nip roller, the fourth traction nip roller and the fifth traction nip roller start to clamp and close, a third bubble is formed, the process is called foaming, and the foaming process is also aerated.
The existing three-bubble blown film production equipment still has the following problems to be perfected:
the first, chilled meat product packaging film requires a large longitudinal stretch ratio of the film, typically up to about 3.5:1, which is typically performed in the second bubble forming unit, meaning that the third pulling nip will rotate at about 3.5 times the speed of the second pulling nip. After the second bubble is formed, a worker must hold the front end of the bubble to guide the front end of the bubble from the third traction nip roller to the fourth traction nip roller, the distance between the third traction nip roller and the fourth traction nip roller is long, the bubble must vertically climb for a long distance, the moving speed of the worker is limited, the third traction nip roller rotates fast and continuously conveys the film downstream at a high speed at the moment, the moving speed of the worker is often possibly lower than the speed of conveying the film out of the third traction nip roller, the film threading worker often appears busy and disorderly hands and feet and cannot timely pull the film to cause the film to be detained, the detained film is easily entangled with each other or other external parts, and the film threading failure is caused and must come again.
Secondly, the cold fresh meat packaging film has higher requirements on barrier property, heat shrinkage service temperature, heat shrinkage stability, heat shrinkage rate and shrinkage force, which means that the composite structure of the cold fresh meat packaging film is complex, and the material composition of each layer of the film is complex. In the structure of the traditional film blowing production equipment, an infrared heating mode is simply adopted, the temperature and shrinkage rate of each layer are difficult to control accurately, particularly the heating effect on a hydrophilic nylon layer is more unstable, the molecular orientation of the components of each layer after stretching is not ideal, and the performance requirement of the film for packaging cold fresh meat can not be met well.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned shortcoming and provide a high separation film blown film production facility of high shrinkage percentage, it can make the workman can implement the bubbling and the work of aerifing of third bubble very leisurely, and the film shrinkage percentage of producing is big and stable, and the skin performance is good.
The purpose can be realized according to the following scheme: a high-shrinkage high-barrier film blowing production device comprises a first bubble forming unit, a second bubble forming unit, a third bubble forming unit and a finished film winding unit, wherein the second bubble forming unit is positioned at the downstream of the first bubble forming unit, the third bubble forming unit is positioned at the downstream of the second bubble forming unit, and the finished film winding unit is positioned at the downstream of the third bubble forming unit;
the first bubble forming unit comprises an extrusion die head and a first traction nip roller, an extrusion opening of the extrusion die head faces downwards, and the first traction nip roller is positioned below the extrusion die head;
the second bubble forming unit comprises a second traction nip roller and a third traction nip roller, the second traction nip roller is positioned above the third traction nip roller, a far infrared heating box is arranged between the second traction nip roller and the third traction nip roller, and the far infrared heating box is provided with a plurality of far infrared radiation ceramic heating elements with adjustable heating power;
the third bubble forming unit comprises a fourth traction nip roller and a fifth traction nip roller, the fourth traction nip roller is positioned above the fifth traction nip roller, an infrared heating box is arranged between the fourth traction nip roller and the fifth traction nip roller, and the infrared heating box is provided with an infrared heating element;
the rotating speed of the third traction nip roller is greater than that of the second traction nip roller, and the rotating speed of the second traction nip roller is equal to that of the first traction nip roller; the rotating speed of the fourth traction nip roller and the rotating speed of the fifth traction nip roller are both equal to the rotating speed of the third traction nip roller;
the device is mainly characterized in that a cold water bath mechanism is arranged between the first bubble forming unit and the second bubble forming unit; the cold water bath mechanism comprises a cold water tank, a cooler is matched with the cold water tank, and a guide roller is arranged in the cold water tank;
a hot water bath mechanism is also arranged between the second bubble forming unit and the third bubble forming unit; the hot water bath mechanism comprises a hot water tank, a heater is matched with the hot water tank, and a guide roller is arranged in the hot water tank;
a film storage mechanism is also arranged between the second bubble forming unit and the third bubble forming unit; store up membrane mechanism and include many fixed rollers and movable roll, wherein each fixed roller arranges into a vertical column, and each movable roll arranges into another vertical column, and the vertical position of fixed roller and movable roll forms cross arrangement, and each movable roll is installed on the movable roll support, still is equipped with the electric drive mechanism who drives movable roll support horizontal migration that makes a round trip.
The utility model has the advantages of it is following and effect:
firstly, a film storage mechanism is arranged between the second bubble forming unit and the third bubble forming unit, so that in the foaming process, when the third traction clamping roller rotates rapidly and continuously conveys the film material downstream at a high speed, the film material can be temporarily stored by the film storage mechanism (specifically, the horizontal distance between the fixed roller and the movable roller is pulled away, and the film path is prolonged), and thus, workers can very leisurely carry out the foaming and inflation work of the third bubble.
A cold water bath mechanism is arranged between the first bubble forming unit and the second bubble forming unit; when the film blank is just extruded, the film blank is quenched by low-temperature water immersion bath, so that the high polymer is in an amorphous state, and the subsequent stretching and blowing are convenient.
Thirdly, a hot water bath mechanism is arranged between the second bubble forming unit and the third bubble forming unit, and the third bubble forming unit is provided with an infrared heating box; like this, can implement two kinds of heat setting modes of water bath damp heat design and dry heat design to the film after the inflation drawing, especially take care of the heating effect of the strong PA layer (nylon layer) of hydrophilicity for whole design is effectual, and the hand feel is soft after the design, and the shrinkage factor after the design is stable, has satisfied the demand of cold fresh meat packaging film, makes its barrier properties good, and thermal shrinkage service temperature is low, and thermal shrinkage stability is high, and the shrinkage factor is big, and the skin performance is good.
Drawings
Fig. 1 is a schematic view of the overall structure and the operation state of the embodiment of the present invention.
Fig. 2 is a schematic view of the cold water bath mechanism of fig. 1.
Fig. 3 is a schematic view of the hot water bath mechanism of fig. 1.
FIG. 4 is a schematic structural diagram of the film storing mechanism in FIG. 1 before film storing.
Fig. 5 is a schematic structural diagram of the film storage mechanism in fig. 1 after film storage.
Detailed Description
The high-shrinkage high-barrier film blowing production equipment shown in fig. 1 comprises a first bubble forming unit 1, a second bubble forming unit 2, a third bubble forming unit 3 and a finished film winding unit, wherein the second bubble forming unit 2 is positioned at the downstream of the first bubble forming unit 1, the third bubble forming unit 3 is positioned at the downstream of the second bubble forming unit 2, and the finished film winding unit is positioned at the downstream of the third bubble forming unit 3; the first bubble forming unit 1 comprises an extrusion die head 11 and a first traction nip roller 41, wherein an extrusion opening of the extrusion die head 11 faces downwards, and the first traction nip roller 41 is positioned below the extrusion die head; the second bubble forming unit 2 comprises a second traction nip roller 42 and a third traction nip roller 43, the second traction nip roller 42 is positioned above the third traction nip roller 43, a far infrared heating box 21 is arranged between the second traction nip roller 42 and the third traction nip roller 43, the far infrared heating box 21 is provided with a plurality of far infrared radiation ceramic heating elements with adjustable heating power and a temperature measuring mechanism; the third bubble forming unit 3 comprises a fourth traction nip roller 44 and a fifth traction nip roller 45, the fourth traction nip roller 44 is positioned above the fifth traction nip roller 45, an infrared heating box 31 is arranged between the fourth traction nip roller 44 and the fifth traction nip roller 45, and the infrared heating box 31 is provided with an infrared heating element.
As shown in fig. 1 and 2, a cold water bath mechanism 5 is further provided between the first bubble forming unit 1 and the second bubble forming unit 2; the cold water bath mechanism 5 comprises a cold water tank 51, a cooler 52 is arranged on the cold water tank 51 in a matching way, and a guide roller 53 is arranged in the cold water tank 51;
as shown in fig. 1 and 3, a hot water bath mechanism 6 is further provided between the second bubble forming unit 2 and the third bubble forming unit 3; the hot water bath mechanism 6 comprises a hot water tank 61, a heater 62 is arranged on the hot water tank 61 in a matching way, and a guide roller 63 is arranged in the hot water tank 61;
as shown in fig. 1, 4 and 5, a film storage mechanism 7 is further arranged between the second bubble forming unit 2 and the third bubble forming unit 3; the film storage mechanism 7 comprises a plurality of fixed rollers 71 and movable rollers 72, wherein each fixed roller 71 is arranged into a vertical column, each movable roller 72 is arranged into another vertical column, the vertical positions of the fixed rollers 71 and the movable rollers 72 form a crossed arrangement, each movable roller 72 is installed on the movable roller support 70, and an electric driving mechanism for driving the movable roller support to horizontally move back and forth is further arranged.
The rotation speed of the third traction nip 43 is equal to 3.5 times the rotation speed of the second traction nip 32, and the rotation speed of the second traction nip 42 is equal to the rotation speed of the first traction nip 41; the rotation speed of the fourth drawing nip roller 44 and the rotation speed of the fifth drawing nip roller 45 are both equal to the rotation speed of the third drawing nip roller 43.
The working process and principle of the above embodiment are as follows:
as shown in fig. 1, a molten resin material is continuously extruded downward from an extrusion die 11 to form a tubular film blank, and the state of the film blank at this time is referred to as a first bubble 10 of the film blank; the film blank runs through the first traction nip roller 41, the first bubble 10 of the film blank is clamped by the first traction nip roller 41 to become a double-layer film material 8, and the double-layer film material 8 is guided into a cold water tank 51 (the inside of which is provided with cold water with the temperature of about 8 ℃) and bypasses a guide roller 53 in the cold water tank, as shown in figure 2; the film blank just extruded is soaked in low-temperature water and quenched, so that the high polymer is in an amorphous state, and subsequent stretching and blowing are facilitated;
then, the film blank enters between a second traction nip roller 32 and a third traction nip roller 33 of the second bubble forming unit 2, the state of the film blank is called as a second bubble 20, in the second bubble forming unit 2, a far infrared radiation ceramic heating element heats the film blank second bubble 20 to be higher than the glass transition temperature and lower than the melting point, the rotating speed of a third traction nip roller 43 reaches 3.5 times of the rotating speed of a second traction nip roller 42, and under the action of traction force and compressed air, the film blank second bubble 20 is stretched and blown by 3.5 times;
after the second bubble forming, the film blank is clamped by the third traction nip roller 43 to become the double-layer film material 8 again, after the film blank is stretched and blown by the second bubble forming unit 2, the residual stress exists in the film blank, so that the double-layer film material 8 is guided into a hot water tank 61 (the inside of the hot water tank is provided with hot water of about 80 ℃), and bypasses a guide roller 63 in the hot water tank 61 to be formed by a hot water bath method, the residence time of the film blank in the hot water tank 61 is about 3-5 seconds, the film blank is subjected to hot and humid forming by a water bath, and the special requirements of a PA layer are taken into consideration, as shown in FIG. 3; and then, the film blank enters a space between a fourth traction nip roller 34 and a fifth traction nip roller 35 of a third bubble forming unit, the state of the film blank is called as a third bubble 30, the third bubble 30 enters an infrared heating box 31 to be heated to a proper temperature, and finally the third bubble 30 is pulled out by a fifth traction nip roller 45 to form a double-layer finished film 80 which is wound by a finished film winding unit. In the third bubble forming unit 3, the speeds of the fourth drawing nip roller 44 and the fifth drawing nip roller 45 are equal, the third bubble 30 is not stretched or blown, and the heating in the third bubble forming unit mainly makes the molecular arrangement of the film blank more stable, the shrinkage rate more stable, and the stability under the conventional state is achieved.
In addition, during the foaming process, when the third drawing nip roller 43 rapidly rotates and continuously delivers the double-layered film 8 downstream at a high speed, the film storage mechanism can temporarily store the film 8, specifically, the electric driving mechanism pulls the movable roller 72 in fig. 1 and 4 to the right, pulls the horizontal transverse distance between the movable roller and the fixed roller, and extends the path of the film 8 after the pulling to the right as shown in fig. 5, so that the double-layered film 8 delivered from the third drawing nip roller can be temporarily stored between the fixed roller 71 and the movable roller 72 of the film storage mechanism, and the worker can very easily perform the foaming and inflation operations of the third bubble 30. After the third bubble 30 is completely foamed and inflated, the movable roller 72 in fig. 5 can be pushed back to the left, shortening the path of the film material, releasing the film material, and the released double-layer film material 8 is slowly absorbed by the downstream mechanism.
Claims (1)
1. A high-shrinkage high-barrier film blowing production device comprises a first bubble forming unit, a second bubble forming unit, a third bubble forming unit and a finished film winding unit, wherein the second bubble forming unit is positioned at the downstream of the first bubble forming unit, the third bubble forming unit is positioned at the downstream of the second bubble forming unit, and the finished film winding unit is positioned at the downstream of the third bubble forming unit; the first bubble forming unit comprises an extrusion die head and a first traction nip roller, an extrusion opening of the extrusion die head faces downwards, and the first traction nip roller is positioned below the extrusion die head; the second bubble forming unit comprises a second traction nip roller and a third traction nip roller, the second traction nip roller is positioned above the third traction nip roller, a far infrared heating box is arranged between the second traction nip roller and the third traction nip roller, and the far infrared heating box is provided with a plurality of far infrared radiation ceramic heating elements with adjustable heating power; the third bubble forming unit comprises a fourth traction nip roller and a fifth traction nip roller, the fourth traction nip roller is positioned above the fifth traction nip roller, an infrared heating box is arranged between the fourth traction nip roller and the fifth traction nip roller, and the infrared heating box is provided with an infrared heating element; the rotating speed of the third traction nip roller is greater than that of the second traction nip roller, and the rotating speed of the second traction nip roller is equal to that of the first traction nip roller; the rotating speed of the fourth traction nip roller and the rotating speed of the fifth traction nip roller are both equal to the rotating speed of the third traction nip roller; the method is characterized in that: a cold water bath mechanism is also arranged between the first bubble forming unit and the second bubble forming unit; the cold water bath mechanism comprises a cold water tank, a cooler is matched with the cold water tank, and a guide roller is arranged in the cold water tank; a hot water bath mechanism is also arranged between the second bubble forming unit and the third bubble forming unit; the hot water bath mechanism comprises a hot water tank, a heater is matched with the hot water tank, and a guide roller is arranged in the hot water tank; a film storage mechanism is also arranged between the second bubble forming unit and the third bubble forming unit; store up membrane mechanism and include many fixed rollers and movable roll, wherein each fixed roller arranges into a vertical column, and each movable roll arranges into another vertical column, and the vertical position of fixed roller and movable roll forms cross arrangement, and each movable roll is installed on the movable roll support, still is equipped with the electric drive mechanism who drives movable roll support horizontal migration that makes a round trip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020333801.0U CN212555127U (en) | 2020-03-17 | 2020-03-17 | High-shrinkage high-barrier film blowing production equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020333801.0U CN212555127U (en) | 2020-03-17 | 2020-03-17 | High-shrinkage high-barrier film blowing production equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212555127U true CN212555127U (en) | 2021-02-19 |
Family
ID=74618511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020333801.0U Active CN212555127U (en) | 2020-03-17 | 2020-03-17 | High-shrinkage high-barrier film blowing production equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212555127U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114770970A (en) * | 2022-04-28 | 2022-07-22 | 西德装备(广东)有限公司 | Online tensile integrative production line of blown film |
| CN114905728A (en) * | 2022-05-18 | 2022-08-16 | 西德装备(广东)有限公司 | Preparation method of blown film on-line secondary stretching film |
-
2020
- 2020-03-17 CN CN202020333801.0U patent/CN212555127U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114770970A (en) * | 2022-04-28 | 2022-07-22 | 西德装备(广东)有限公司 | Online tensile integrative production line of blown film |
| CN114905728A (en) * | 2022-05-18 | 2022-08-16 | 西德装备(广东)有限公司 | Preparation method of blown film on-line secondary stretching film |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212555127U (en) | High-shrinkage high-barrier film blowing production equipment | |
| US3342657A (en) | Process and apparatus for producing laminated oriented thermoplastic film | |
| US3551540A (en) | Process for the continuous production of uniaxially and biaxially oriented films | |
| US4379117A (en) | Method for preparing a film of vinylidene chloride polymer | |
| EP2321116B1 (en) | Method and apparatus for manufacture of a polymer film, which is oriented under an angle to its longitudinal direction | |
| JPH09509903A (en) | Method for producing biaxially stretched thermoplastic film | |
| JPH0239978B2 (en) | ||
| US3960997A (en) | Method of manufacturing biaxially stretched shrink foils and an apparatus for carrying the method into effect | |
| US5282915A (en) | Method and apparatus for producing continuous plastic-fabric bicomponent lamina | |
| CN1160185C (en) | Method and implement for producing bidirectional stretching-resistant tube-shape compound diaphragm and plain compound liaphragm | |
| KR101291376B1 (en) | An improved process and apparatus for producing a shrinkable plastic film by environment-friendly resin material | |
| US3471606A (en) | Producing thermoplastic films | |
| WO2015031122A1 (en) | Process for forming film | |
| US5350471A (en) | Production of cross-laminated film from tube | |
| US4842907A (en) | Biaxially stretched tubularly extruded film with transverse closure strip | |
| CN111283992B (en) | Transverse stretching device for BOPP film production | |
| US4931003A (en) | Apparatus for making biaxially stretched tubularly extended film with transverse closure strip | |
| US3751542A (en) | Orientation of tubing for a continuous process for making blow molded containers | |
| CN101733927A (en) | Method and equipment for producing shrinkable film through core rod type tube-film bi-directional drawing device | |
| US3687585A (en) | Apparatus for manufacturing synthetic resin tube provided with heat-shrinking property | |
| CN216100516U (en) | Incessant plastic uptake shaping water pocket apparatus for producing | |
| CN205588731U (en) | Anti membrane of tearing of isotropic tensile and manufacturing installation thereof | |
| CN113021839A (en) | PET (polyethylene terephthalate) foaming material molding extruder for automotive interior and using method thereof | |
| CN209208066U (en) | A kind of tear-proof membrane production equipment | |
| CN203994689U (en) | Battery diaphragm simple tension micro molding equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |