CN112373076A - Preparation method of high-barrier steaming-resistant easy-to-uncover film and easy-to-uncover film - Google Patents
Preparation method of high-barrier steaming-resistant easy-to-uncover film and easy-to-uncover film Download PDFInfo
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- CN112373076A CN112373076A CN202011123417.9A CN202011123417A CN112373076A CN 112373076 A CN112373076 A CN 112373076A CN 202011123417 A CN202011123417 A CN 202011123417A CN 112373076 A CN112373076 A CN 112373076A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
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- 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
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
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- 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
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- 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
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/023—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets using multilayered plates or sheets
-
- 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
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
- B29C55/06—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with the direction of feed
- B29C55/065—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with the direction of feed in several stretching steps
-
- 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
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/02—Thermal after-treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
-
- 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
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/02—Thermal after-treatment
- B29C2071/022—Annealing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/54—Yield strength; Tensile strength
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
The invention relates to a preparation method of a high-barrier steaming-resistant easy-uncovering film and the easy-uncovering film, and the product structure is as follows: PP/SUYLN/PA/PVDC/PA/SUYLN/release material; the production steps are that step 1, 9 layers of co-extrusion equipment are adopted to produce the film for extrusion production; step 2, extruding a film, and enabling the melt to be rapidly cooled and shaped through a rapid cooling device; step 3, drawing the film into an annealing and stretching treatment system, and performing preheating through an oven and repeated stretching and shaping through multiple rollers; and 4, rolling the stretched and shaped film by using a rolling device to form a high-barrier steaming-resistant easy-uncovering film finished product. The invention ensures high barrier property, boiling resistance and easy uncovering property through material structure design; meanwhile, a special annealing and stretching treatment system is arranged after film blowing, the transverse and longitudinal stretching difference of the film is adjusted, and the crystallinity and the grain size of the film are changed through repeated heating, cooling and alternate rapid heating and quenching change of temperature, so that the transverse and longitudinal difference of the material is more balanced.
Description
Technical Field
The invention relates to the technical field of packaging films, in particular to a production method of a preparation method of a high-barrier steaming-resistant easy-uncovering film.
Background
In the production and processing process of meat food, two cooking processes, namely high-temperature high-pressure sterilization and low-temperature normal-pressure sterilization, exist all the time. The meat food sterilized at low temperature has fresh and tender mouthfeel and better preservation of various nutritional ingredients because the heating temperature is low and the fiber of the meat is not damaged; but because only the pathogenic bacteria are killed, a large amount of putrefying bacteria still exist, the quality guarantee period is short, and the loss in the circulation field is easily caused. The meat food sterilized at high temperature has excessive shrinkage of meat fiber due to high heating temperature, and has no taste like low temperature sterilized product, but has long shelf life due to killing all bacteria and eliminating putrefaction intrinsic factor.
If the meat food sterilized at high temperature is made of high-barrier packaging materials, the meat food not only can be stored at normal temperature for a long time, but also is convenient to transport, store and sell, and is very suitable for the consumption requirements of the modern society. Therefore, the development of meat products which are storage-resistant at normal temperature is a great development direction for the meat food industry. The packaging industry conforms to the development trend, and the packaging industry is innovative, can meet the needs of the food industry and can win a wide market for the packaging industry.
The easy-to-tear material of the steam-resistant film is more popular in the market as a packaging material convenient to use, and the easy-to-tear products in the current market have the condition of large difference of longitudinal and transverse easy-to-tear strength, so that the problems of bag breaking, leakage and the like exist in the actual use.
In order to obtain a high-barrier cooking-resistant easy-open film with better performance for meat packaging, further research and improvement on the structure and production process of the packaging film are necessary.
Disclosure of Invention
The invention aims to provide a preparation method of a high-barrier steaming-resistant easy-uncovering film and the easy-uncovering film, which aim to meet the requirements of meat packaging on related performance, and particularly have small longitudinal and transverse easy-uncovering strength difference.
In order to achieve the above object, a first aspect of the present invention provides a method for preparing a high-barrier, steam-resistant and easy-to-tear film, comprising the steps of:
step 1, adopting 9 layers of co-extrusion equipment to perform production film extrusion production;
the product structure is as follows: PP/SUYLN/PA/PVDC/PA/SUYLN/release material;
and 4, rolling the stretched and shaped film by using a rolling device to form a high-barrier steaming-resistant easy-uncovering film finished product.
As a further improvement of the invention, in the step 1, the diameter of a screw of the co-extrusion equipment is 50mm, the length-diameter ratio is 25-35: 1, and the screw is an alloy corrosion-resistant screw;
the extrusion die adopts a die head with the diameter of 300mm, and the gap between the die heads is 3-4 mm.
As a further improvement of the present invention, in the step 3, the annealing and stretching treatment system comprises a preheating oven, a preheating roller set and a cooling roller set;
the film is firstly put into the preheating oven to be heated to 45 +/-10 ℃;
the film is wound around the preheating roller group and the cooling roller group, and the film repeatedly passes through the preheating roller and the cooling roller to be subjected to repeated shock heating and shock cooling treatment.
Furthermore, a plurality of guide rollers are arranged in the preheating oven, and the film bypasses the roller group consisting of the guide rollers.
Further, the surface temperature of each preheating roller in the preheating roller group is set to be 100 +/-5 ℃; the contact time is more than 0.5S;
the surface temperature of each cooling roller in the cooling roller group is set to be 25 +/-5 ℃; the contact time is greater than 0.5S.
Further, the preheating rollers of the preheating roller group are stretching rollers, and the film is stretched in the longitudinal direction while being heated.
And further, the longitudinal stretching multiplying power of the preheating roller set to the film is 0.7-1.
In a second aspect of the invention, a high-barrier and boiling-resistant easy-uncovering film is provided, which is characterized by being prepared by adopting the steps; wherein the content of the first and second substances,
PA/SUYLN is adopted to provide stiffness and mechanical properties;
PVDC is adopted to provide gas barrier property;
PP is adopted to provide moisture resistance;
easy-to-tear material is adopted to provide easy-to-peel performance.
Furthermore, the overall thickness of the high-barrier steaming-resistant easy-uncovering film product is 50-300 microns.
Aiming at the high-barrier steaming-resistant easy-uncovering performance, the special easy-uncovering film is prepared; the high barrier property, the boiling resistance and the easy uncovering property are ensured through the structural design of the material; meanwhile, a special annealing and stretching treatment system is arranged after film blowing, the transverse and longitudinal stretching difference of the film is adjusted, and the crystallinity and the grain size of the film are changed through repeated heating, cooling and alternate rapid heating and quenching change of temperature, so that the transverse and longitudinal difference of the material is more balanced.
Compared with the prior art, the invention has the advantages and beneficial effects that:
1. the structure is simple, and the film blowing manufacture is easy;
2. a special annealing and stretching treatment system is arranged, so that the crystallinity and the grain size of the film are improved, the transverse and longitudinal differences of the material are more balanced, the deformation of the film material is uniform in the film uncovering process, and better uncovering easiness is obtained;
3. the annealing and stretching treatment system adopts the temperature alternation shock heating and quenching change, does not reduce the running speed of the film and meets the normal film blowing production requirement;
4. the pre-stretching is carried out in the heating process, and the pre-stretching is more uniform and stable through the sectional heating and stretching.
Drawings
FIG. 1 is a schematic view of an annealing and stretching treatment system according to the present invention.
Detailed Description
The invention is further described below with reference to the following figures and specific examples.
The invention provides a high-barrier steaming-resistant easy-uncovering film which is prepared by adopting a multi-layer co-extrusion mode;
the product structure is as follows: PP/SUYLN/PA/PVDC/PA/SUYLN/release material; and (5) producing by using a water-cooling line.
Due to the difference between the material property and the actual processing crystallinity, the structural design of the film product comprises the following steps:
use of PA/SUYLN, Polyamide/surlyn resin (SuYLN, tradename therein) to provide stiffness and mechanical properties;
PVDC (polyvinyl dichloride) is adopted to provide good gas barrier property;
PP and polypropylene are adopted to provide good moisture resistance;
the easy-to-tear material is adopted, so that good easy-to-peel performance is provided; the release material is available from Basel corporation under the designation SP 2000B.
According to the requirements of specific application occasions, the overall thickness of the high-barrier steaming-resistant easy-uncovering film product is generally 50-275 microns.
The high-barrier steaming-resistant easy-uncovering film is produced by adopting 9 layers of co-extrusion equipment, the diameter of a screw rod of the co-extrusion equipment is 50mm, the length-diameter ratio is 25-35: 1, and the screw rod is an alloy corrosion-resistant screw rod; the extrusion die adopts a die head with the diameter of 300mm, and the gap between the die heads is 3-4 mm.
The material is plasticized and extruded, and the melt is rapidly cooled and shaped through a rapid cooling device, so that the film has low crystallinity. And then drawing the film into an annealing and stretching treatment system, preheating the film by an oven and repeatedly stretching and shaping the film by a plurality of rollers to reduce the orientation difference of the material in the transverse and longitudinal directions, and rolling the stretched and shaped film by a rolling device.
The physical properties of the material in the transverse and longitudinal directions are different due to inconsistent transverse and longitudinal stretching, and the maximum difference is 2-3 times; therefore, the film formed by extrusion needs to be annealed and stretched, so that the transverse and longitudinal orientation of the film tends to be balanced, and the crystallinity and the grain size can be better controlled, thereby balancing the easy-to-tear strength.
The annealing and stretching treatment system comprises a preheating oven 1, a preheating roller set 3 and a cooling roller set 4 as shown in figure 1; a plurality of guide rollers 2 are arranged in the preheating oven 1, a film is enabled to bypass the roller sets through the roller sets formed by the guide rollers 2, the preheating oven 1 is fully heated, and the temperature in the preheating oven 1 is set to be 50 +/-10 ℃; the surface temperature of the film output after being preheated by the preheating oven 1 is controlled to be 45 +/-10 ℃; then the film passes through the preheating roller group 3 and the cooling roller group 4, repeatedly passes through the preheating roller and the cooling roller, and changes the crystallinity and the grain size of the film through repeated heating, cooling and temperature change, thereby leading the transverse and longitudinal difference of the material to be more balanced.
Specifically, the method comprises the following steps:
the surface temperature of each preheating roller in the preheating roller group 3 is set to be 100 +/-5 ℃; the contact time is more than 0.5S;
the surface temperature of each cooling roller in the cooling roller group 4 is set to be 25 +/-5 ℃; the contact time is more than 0.5S;
the surface temperature difference between the preheating roller and the cooling roller is about 75 ℃, and the crystal structure of the plastic film is improved through repeated quick heating and quick cooling treatment.
Furthermore, the speed control device is used for controlling the rotating speed of each preheating roller in the guide roller 2 and the preheating roller group 3 and the rotating speed of each cooling roller in the cooling roller group 4, so that the film is stretched in the winding process, particularly when passing through the preheating rollers of the preheating roller group 3, the film is stretched, the stretching ratio is controlled to be 0.7-1, and the transverse and longitudinal stretching difference of the material is more balanced.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the embodiments disclosed, but is capable of various modifications and substitutions without departing from the spirit of the invention.
Claims (8)
1. A preparation method of a high-barrier steaming-resistant easy-uncovering film is characterized by comprising the following steps:
step 1, adopting 9 layers of co-extrusion equipment to perform production film extrusion production;
the product structure is as follows: PP/SUYLN/PA/PVDC/PA/SUYLN/release material;
step 2, extruding a film, and enabling the melt to be rapidly cooled and shaped through a rapid cooling device;
step 3, drawing the film into an annealing and stretching treatment system, and performing preheating through an oven and repeated stretching and shaping through multiple rollers;
and 4, rolling the stretched and shaped film by using a rolling device to form a high-barrier steaming-resistant easy-uncovering film finished product.
2. The preparation method of the high-barrier steaming-resistant easy-uncovering film according to claim 1, characterized in that the screw diameter of the co-extrusion equipment in the step 1 is 50mm, the length-diameter ratio is 25-35: 1, and the screw is an alloy corrosion-resistant screw;
the extrusion die adopts a die head with the diameter of 300mm, and the gap between the die heads is 3-4 mm.
3. The method for preparing the high-barrier cooking-resistant easy-release film according to claim 1, wherein in the step 3, the annealing and stretching treatment system comprises a preheating oven, a preheating roller set and a cooling roller set;
the film is firstly put into the preheating oven to be heated to 45 +/-10 ℃;
the film is wound around the preheating roller group and the cooling roller group, and the film repeatedly passes through the preheating roller and the cooling roller to be subjected to repeated shock heating and shock cooling treatment.
4. The method for preparing the high-barrier cooking-resistant easy-uncovering film according to claim 3, characterized in that a plurality of guide rollers are arranged in the preheating oven, and the film bypasses a roller group consisting of the guide rollers.
5. The method for preparing the high-barrier cooking-resistant easy-release film according to claim 3, wherein the surface temperature of each preheating roller in the preheating roller group is set to be 100 ℃ +/-5 ℃; the contact time is more than 0.5S;
the surface temperature of each cooling roller in the cooling roller group is set to be 25 +/-5 ℃; the contact time is greater than 0.5S.
6. The method for preparing a high-barrier boiling-resistant easy-open film according to claim 5, wherein the preheating rollers of the preheating roller group are stretching rollers, and the film is stretched in the longitudinal direction while being heated.
And further, the longitudinal stretching multiplying power of the preheating roller set to the film is 0.7-1.
7. A high barrier and retort resistant easy-release film, which is characterized by being prepared by the steps of any one of the claims 1 to 6; wherein the content of the first and second substances,
PA/SUYLN is adopted to provide stiffness and mechanical properties;
PVDC is adopted to provide gas barrier property;
PP is adopted to provide moisture resistance;
easy-to-tear material is adopted to provide easy-to-peel performance.
8. The high-barrier boiling-resistant easy-release film as claimed in claim 7, wherein the overall thickness of the high-barrier boiling-resistant easy-release film product is 50-300 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011123417.9A CN112373076A (en) | 2020-10-20 | 2020-10-20 | Preparation method of high-barrier steaming-resistant easy-to-uncover film and easy-to-uncover film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011123417.9A CN112373076A (en) | 2020-10-20 | 2020-10-20 | Preparation method of high-barrier steaming-resistant easy-to-uncover film and easy-to-uncover film |
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| Publication Number | Publication Date |
|---|---|
| CN112373076A true CN112373076A (en) | 2021-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011123417.9A Withdrawn CN112373076A (en) | 2020-10-20 | 2020-10-20 | Preparation method of high-barrier steaming-resistant easy-to-uncover film and easy-to-uncover film |
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| CN (1) | CN112373076A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080233393A1 (en) * | 2007-03-22 | 2008-09-25 | Theodore Coburn | Film to enclose composite structures |
| CN102029709A (en) * | 2009-10-05 | 2011-04-27 | 大连大富塑料彩印有限公司 | Method for manufacturing polymer film |
| CN103146190A (en) * | 2013-02-26 | 2013-06-12 | 上海凯赛生物技术研发中心有限公司 | Nylon film |
| CN104191626A (en) * | 2014-08-27 | 2014-12-10 | 桂林电器科学研究院有限公司 | High-low-temperature alternate processing process for manufacturing polyimide film and production line of polyimide film |
| CN104494177A (en) * | 2014-12-22 | 2015-04-08 | 江阴申隆包装材料有限公司 | System for producing back sealing strips |
| CN107351496A (en) * | 2017-07-17 | 2017-11-17 | 安徽国风塑业股份有限公司 | A kind of high-barrier type biaxial tension co-extrusion film and preparation method |
| CN206968010U (en) * | 2017-06-16 | 2018-02-06 | 东莞市光志光电有限公司 | A kind of coextrusion mold optics film device |
| CN207059210U (en) * | 2017-06-23 | 2018-03-02 | 烟台丰福莱薄膜科技有限公司 | A kind of online longitudinal tensile fixture for producing longitudinal Straight-line easily-torn thin film |
-
2020
- 2020-10-20 CN CN202011123417.9A patent/CN112373076A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080233393A1 (en) * | 2007-03-22 | 2008-09-25 | Theodore Coburn | Film to enclose composite structures |
| CN102029709A (en) * | 2009-10-05 | 2011-04-27 | 大连大富塑料彩印有限公司 | Method for manufacturing polymer film |
| CN103146190A (en) * | 2013-02-26 | 2013-06-12 | 上海凯赛生物技术研发中心有限公司 | Nylon film |
| CN104191626A (en) * | 2014-08-27 | 2014-12-10 | 桂林电器科学研究院有限公司 | High-low-temperature alternate processing process for manufacturing polyimide film and production line of polyimide film |
| CN104494177A (en) * | 2014-12-22 | 2015-04-08 | 江阴申隆包装材料有限公司 | System for producing back sealing strips |
| CN206968010U (en) * | 2017-06-16 | 2018-02-06 | 东莞市光志光电有限公司 | A kind of coextrusion mold optics film device |
| CN207059210U (en) * | 2017-06-23 | 2018-03-02 | 烟台丰福莱薄膜科技有限公司 | A kind of online longitudinal tensile fixture for producing longitudinal Straight-line easily-torn thin film |
| CN107351496A (en) * | 2017-07-17 | 2017-11-17 | 安徽国风塑业股份有限公司 | A kind of high-barrier type biaxial tension co-extrusion film and preparation method |
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Address after: 214400 No.2 Tonggang Road, Changjing Town, Jiangyin, Wuxi, Jiangsu Province Applicant after: Shenghui New Material Co.,Ltd. Address before: No.2, Tonggang Road, Changjing Town, Jiangyin, Wuxi City, Jiangsu Province Applicant before: JIANGYIN SUNRISE PACKAGING MATERIAL Co.,Ltd. |
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Application publication date: 20210219 |